diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp')
26 files changed, 9470 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_asn1.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_asn1.c new file mode 100644 index 0000000..f35b760 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_asn1.c @@ -0,0 +1,749 @@ +/** + * @file + * Abstract Syntax Notation One (ISO 8824, 8825) encoding + * + * @todo not optimised (yet), favor correctness over speed, favor speed over size + */ + +/* + * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Christiaan Simons <christiaan.simons@axon.tv> + * Martin Hentschel <info@cl-soft.de> + */ + +#include "lwip/apps/snmp_opts.h" + +#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */ + +#include "snmp_asn1.h" + +#define PBUF_OP_EXEC(code) \ + if ((code) != ERR_OK) { \ + return ERR_BUF; \ + } + +/** + * Encodes a TLV into a pbuf stream. + * + * @param pbuf_stream points to a pbuf stream + * @param tlv TLV to encode + * @return ERR_OK if successful, ERR_ARG if we can't (or won't) encode + */ +err_t +snmp_ans1_enc_tlv(struct snmp_pbuf_stream* pbuf_stream, struct snmp_asn1_tlv* tlv) +{ + u8_t data; + u8_t length_bytes_required; + + /* write type */ + if ((tlv->type & SNMP_ASN1_DATATYPE_MASK) == SNMP_ASN1_DATATYPE_EXTENDED) { + /* extended format is not used by SNMP so we do not accept those values */ + return ERR_ARG; + } + if (tlv->type_len != 0) { + /* any other value as auto is not accepted for type (we always use one byte because extended syntax is prohibited) */ + return ERR_ARG; + } + + PBUF_OP_EXEC(snmp_pbuf_stream_write(pbuf_stream, tlv->type)); + tlv->type_len = 1; + + /* write length */ + if (tlv->value_len <= 127) { + length_bytes_required = 1; + } else if (tlv->value_len <= 255) { + length_bytes_required = 2; + } else { + length_bytes_required = 3; + } + + /* check for forced min length */ + if (tlv->length_len > 0) { + if (tlv->length_len < length_bytes_required) { + /* unable to code requested length in requested number of bytes */ + return ERR_ARG; + } + + length_bytes_required = tlv->length_len; + } else { + tlv->length_len = length_bytes_required; + } + + if (length_bytes_required > 1) { + /* multi byte representation required */ + length_bytes_required--; + data = 0x80 | length_bytes_required; /* extended length definition, 1 length byte follows */ + + PBUF_OP_EXEC(snmp_pbuf_stream_write(pbuf_stream, data)); + + while (length_bytes_required > 1) { + if (length_bytes_required == 2) { + /* append high byte */ + data = (u8_t)(tlv->value_len >> 8); + } else { + /* append leading 0x00 */ + data = 0x00; + } + + PBUF_OP_EXEC(snmp_pbuf_stream_write(pbuf_stream, data)); + length_bytes_required--; + } + } + + /* append low byte */ + data = (u8_t)(tlv->value_len & 0xFF); + PBUF_OP_EXEC(snmp_pbuf_stream_write(pbuf_stream, data)); + + return ERR_OK; +} + +/** + * Encodes raw data (octet string, opaque) into a pbuf chained ASN1 msg. + * + * @param pbuf_stream points to a pbuf stream + * @param raw_len raw data length + * @param raw points raw data + * @return ERR_OK if successful, ERR_ARG if we can't (or won't) encode + */ +err_t +snmp_asn1_enc_raw(struct snmp_pbuf_stream* pbuf_stream, const u8_t *raw, u16_t raw_len) +{ + PBUF_OP_EXEC(snmp_pbuf_stream_writebuf(pbuf_stream, raw, raw_len)); + + return ERR_OK; +} + +/** + * Encodes u32_t (counter, gauge, timeticks) into a pbuf chained ASN1 msg. + * + * @param pbuf_stream points to a pbuf stream + * @param octets_needed encoding length (from snmp_asn1_enc_u32t_cnt()) + * @param value is the host order u32_t value to be encoded + * @return ERR_OK if successful, ERR_ARG if we can't (or won't) encode + * + * @see snmp_asn1_enc_u32t_cnt() + */ +err_t +snmp_asn1_enc_u32t(struct snmp_pbuf_stream* pbuf_stream, u16_t octets_needed, u32_t value) +{ + if (octets_needed > 5) { + return ERR_ARG; + } + if (octets_needed == 5) { + /* not enough bits in 'value' add leading 0x00 */ + PBUF_OP_EXEC(snmp_pbuf_stream_write(pbuf_stream, 0x00)); + octets_needed--; + } + + while (octets_needed > 1) { + octets_needed--; + PBUF_OP_EXEC(snmp_pbuf_stream_write(pbuf_stream, (u8_t)(value >> (octets_needed << 3)))); + } + + /* (only) one least significant octet */ + PBUF_OP_EXEC(snmp_pbuf_stream_write(pbuf_stream, (u8_t)value)); + + return ERR_OK; +} + +/** + * Encodes u64_t (counter64) into a pbuf chained ASN1 msg. + * + * @param pbuf_stream points to a pbuf stream + * @param octets_needed encoding length (from snmp_asn1_enc_u32t_cnt()) + * @param value is the host order u32_t value to be encoded + * @return ERR_OK if successful, ERR_ARG if we can't (or won't) encode + * + * @see snmp_asn1_enc_u64t_cnt() + */ +err_t +snmp_asn1_enc_u64t(struct snmp_pbuf_stream* pbuf_stream, u16_t octets_needed, const u32_t* value) +{ + if (octets_needed > 9) { + return ERR_ARG; + } + if (octets_needed == 9) { + /* not enough bits in 'value' add leading 0x00 */ + PBUF_OP_EXEC(snmp_pbuf_stream_write(pbuf_stream, 0x00)); + octets_needed--; + } + + while (octets_needed > 4) { + octets_needed--; + PBUF_OP_EXEC(snmp_pbuf_stream_write(pbuf_stream, (u8_t)(*value >> ((octets_needed-4) << 3)))); + } + + /* skip to low u32 */ + value++; + + while (octets_needed > 1) { + octets_needed--; + PBUF_OP_EXEC(snmp_pbuf_stream_write(pbuf_stream, (u8_t)(*value >> (octets_needed << 3)))); + } + + /* always write at least one octet (also in case of value == 0) */ + PBUF_OP_EXEC(snmp_pbuf_stream_write(pbuf_stream, (u8_t)(*value))); + + return ERR_OK; +} + +/** + * Encodes s32_t integer into a pbuf chained ASN1 msg. + * + * @param pbuf_stream points to a pbuf stream + * @param octets_needed encoding length (from snmp_asn1_enc_s32t_cnt()) + * @param value is the host order s32_t value to be encoded + * @return ERR_OK if successful, ERR_ARG if we can't (or won't) encode + * + * @see snmp_asn1_enc_s32t_cnt() + */ +err_t +snmp_asn1_enc_s32t(struct snmp_pbuf_stream* pbuf_stream, u16_t octets_needed, s32_t value) +{ + while (octets_needed > 1) { + octets_needed--; + + PBUF_OP_EXEC(snmp_pbuf_stream_write(pbuf_stream, (u8_t)(value >> (octets_needed << 3)))); + } + + /* (only) one least significant octet */ + PBUF_OP_EXEC(snmp_pbuf_stream_write(pbuf_stream, (u8_t)value)); + + return ERR_OK; +} + +/** + * Encodes object identifier into a pbuf chained ASN1 msg. + * + * @param pbuf_stream points to a pbuf stream + * @param oid points to object identifier array + * @param oid_len object identifier array length + * @return ERR_OK if successful, ERR_ARG if we can't (or won't) encode + */ +err_t +snmp_asn1_enc_oid(struct snmp_pbuf_stream* pbuf_stream, const u32_t *oid, u16_t oid_len) +{ + if (oid_len > 1) { + /* write compressed first two sub id's */ + u32_t compressed_byte = ((oid[0] * 40) + oid[1]); + PBUF_OP_EXEC(snmp_pbuf_stream_write(pbuf_stream, (u8_t)compressed_byte)); + oid_len -= 2; + oid += 2; + } else { + /* @bug: allow empty varbinds for symmetry (we must decode them for getnext), allow partial compression?? */ + /* ident_len <= 1, at least we need zeroDotZero (0.0) (ident_len == 2) */ + return ERR_ARG; + } + + while (oid_len > 0) { + u32_t sub_id; + u8_t shift, tail; + + oid_len--; + sub_id = *oid; + tail = 0; + shift = 28; + while (shift > 0) { + u8_t code; + + code = (u8_t)(sub_id >> shift); + if ((code != 0) || (tail != 0)) { + tail = 1; + PBUF_OP_EXEC(snmp_pbuf_stream_write(pbuf_stream, code | 0x80)); + } + shift -= 7; + } + PBUF_OP_EXEC(snmp_pbuf_stream_write(pbuf_stream, (u8_t)sub_id & 0x7F)); + + /* proceed to next sub-identifier */ + oid++; + } + return ERR_OK; +} + +/** + * Returns octet count for length. + * + * @param length parameter length + * @param octets_needed points to the return value + */ +void +snmp_asn1_enc_length_cnt(u16_t length, u8_t *octets_needed) +{ + if (length < 0x80U) { + *octets_needed = 1; + } else if (length < 0x100U) { + *octets_needed = 2; + } else { + *octets_needed = 3; + } +} + +/** + * Returns octet count for an u32_t. + * + * @param value value to be encoded + * @param octets_needed points to the return value + * + * @note ASN coded integers are _always_ signed. E.g. +0xFFFF is coded + * as 0x00,0xFF,0xFF. Note the leading sign octet. A positive value + * of 0xFFFFFFFF is preceded with 0x00 and the length is 5 octets!! + */ +void +snmp_asn1_enc_u32t_cnt(u32_t value, u16_t *octets_needed) +{ + if (value < 0x80UL) { + *octets_needed = 1; + } else if (value < 0x8000UL) { + *octets_needed = 2; + } else if (value < 0x800000UL) { + *octets_needed = 3; + } else if (value < 0x80000000UL) { + *octets_needed = 4; + } else { + *octets_needed = 5; + } +} + +/** + * Returns octet count for an u64_t. + * + * @param value value to be encoded + * @param octets_needed points to the return value + * + * @note ASN coded integers are _always_ signed. E.g. +0xFFFF is coded + * as 0x00,0xFF,0xFF. Note the leading sign octet. A positive value + * of 0xFFFFFFFF is preceded with 0x00 and the length is 5 octets!! + */ +void +snmp_asn1_enc_u64t_cnt(const u32_t *value, u16_t *octets_needed) +{ + /* check if high u32 is 0 */ + if (*value == 0x00) { + /* only low u32 is important */ + value++; + snmp_asn1_enc_u32t_cnt(*value, octets_needed); + } else { + /* low u32 does not matter for length determination */ + snmp_asn1_enc_u32t_cnt(*value, octets_needed); + *octets_needed = *octets_needed + 4; /* add the 4 bytes of low u32 */ + } +} + +/** + * Returns octet count for an s32_t. + * + * @param value value to be encoded + * @param octets_needed points to the return value + * + * @note ASN coded integers are _always_ signed. + */ +void +snmp_asn1_enc_s32t_cnt(s32_t value, u16_t *octets_needed) +{ + if (value < 0) { + value = ~value; + } + if (value < 0x80L) { + *octets_needed = 1; + } else if (value < 0x8000L) { + *octets_needed = 2; + } else if (value < 0x800000L) { + *octets_needed = 3; + } else { + *octets_needed = 4; + } +} + +/** + * Returns octet count for an object identifier. + * + * @param oid points to object identifier array + * @param oid_len object identifier array length + * @param octets_needed points to the return value + */ +void +snmp_asn1_enc_oid_cnt(const u32_t *oid, u16_t oid_len, u16_t *octets_needed) +{ + u32_t sub_id; + + *octets_needed = 0; + if (oid_len > 1) { + /* compressed prefix in one octet */ + (*octets_needed)++; + oid_len -= 2; + oid += 2; + } + while (oid_len > 0) { + oid_len--; + sub_id = *oid; + + sub_id >>= 7; + (*octets_needed)++; + while (sub_id > 0) { + sub_id >>= 7; + (*octets_needed)++; + } + oid++; + } +} + +/** + * Decodes a TLV from a pbuf stream. + * + * @param pbuf_stream points to a pbuf stream + * @param tlv returns decoded TLV + * @return ERR_OK if successful, ERR_VAL if we can't decode + */ +err_t +snmp_asn1_dec_tlv(struct snmp_pbuf_stream* pbuf_stream, struct snmp_asn1_tlv* tlv) +{ + u8_t data; + + /* decode type first */ + PBUF_OP_EXEC(snmp_pbuf_stream_read(pbuf_stream, &data)); + tlv->type = data; + + if ((tlv->type & SNMP_ASN1_DATATYPE_MASK) == SNMP_ASN1_DATATYPE_EXTENDED) { + /* extended format is not used by SNMP so we do not accept those values */ + return ERR_VAL; + } + tlv->type_len = 1; + + /* now, decode length */ + PBUF_OP_EXEC(snmp_pbuf_stream_read(pbuf_stream, &data)); + + if (data < 0x80) { /* short form */ + tlv->length_len = 1; + tlv->value_len = data; + } else if (data > 0x80) { /* long form */ + u8_t length_bytes = data - 0x80; + tlv->length_len = length_bytes + 1; /* this byte + defined number of length bytes following */ + tlv->value_len = 0; + + while (length_bytes > 0) { + /* we only support up to u16.maxvalue-1 (2 bytes) but have to accept leading zero bytes */ + if (tlv->value_len > 0xFF) { + return ERR_VAL; + } + PBUF_OP_EXEC(snmp_pbuf_stream_read(pbuf_stream, &data)); + tlv->value_len <<= 8; + tlv->value_len |= data; + + /* take care for special value used for indefinite length */ + if (tlv->value_len == 0xFFFF) { + return ERR_VAL; + } + + length_bytes--; + } + } else { /* data == 0x80 indefinite length form */ + /* (not allowed for SNMP; RFC 1157, 3.2.2) */ + return ERR_VAL; + } + + return ERR_OK; +} + +/** + * Decodes positive integer (counter, gauge, timeticks) into u32_t. + * + * @param pbuf_stream points to a pbuf stream + * @param len length of the coded integer field + * @param value return host order integer + * @return ERR_OK if successful, ERR_ARG if we can't (or won't) decode + * + * @note ASN coded integers are _always_ signed. E.g. +0xFFFF is coded + * as 0x00,0xFF,0xFF. Note the leading sign octet. A positive value + * of 0xFFFFFFFF is preceded with 0x00 and the length is 5 octets!! + */ +err_t +snmp_asn1_dec_u32t(struct snmp_pbuf_stream *pbuf_stream, u16_t len, u32_t *value) +{ + u8_t data; + + if ((len > 0) && (len <= 5)) { + PBUF_OP_EXEC(snmp_pbuf_stream_read(pbuf_stream, &data)); + + /* expecting sign bit to be zero, only unsigned please! */ + if (((len == 5) && (data == 0x00)) || ((len < 5) && ((data & 0x80) == 0))) { + *value = data; + len--; + + while (len > 0) { + PBUF_OP_EXEC(snmp_pbuf_stream_read(pbuf_stream, &data)); + len--; + + *value <<= 8; + *value |= data; + } + + return ERR_OK; + } + } + + return ERR_VAL; +} + +/** + * Decodes large positive integer (counter64) into 2x u32_t. + * + * @param pbuf_stream points to a pbuf stream + * @param len length of the coded integer field + * @param value return host order integer + * @return ERR_OK if successful, ERR_ARG if we can't (or won't) decode + * + * @note ASN coded integers are _always_ signed. E.g. +0xFFFF is coded + * as 0x00,0xFF,0xFF. Note the leading sign octet. A positive value + * of 0xFFFFFFFF is preceded with 0x00 and the length is 5 octets!! + */ +err_t +snmp_asn1_dec_u64t(struct snmp_pbuf_stream *pbuf_stream, u16_t len, u32_t *value) +{ + u8_t data; + + if (len <= 4) { + /* high u32 is 0 */ + *value = 0; + /* directly skip to low u32 */ + value++; + } + + if ((len > 0) && (len <= 9)) { + PBUF_OP_EXEC(snmp_pbuf_stream_read(pbuf_stream, &data)); + + /* expecting sign bit to be zero, only unsigned please! */ + if (((len == 9) && (data == 0x00)) || ((len < 9) && ((data & 0x80) == 0))) { + *value = data; + len--; + + while (len > 0) { + PBUF_OP_EXEC(snmp_pbuf_stream_read(pbuf_stream, &data)); + + if (len == 4) { + /* skip to low u32 */ + value++; + *value = 0; + } else { + *value <<= 8; + } + + *value |= data; + len--; + } + + return ERR_OK; + } + } + + return ERR_VAL; +} + +/** + * Decodes integer into s32_t. + * + * @param pbuf_stream points to a pbuf stream + * @param len length of the coded integer field + * @param value return host order integer + * @return ERR_OK if successful, ERR_ARG if we can't (or won't) decode + * + * @note ASN coded integers are _always_ signed! + */ +err_t +snmp_asn1_dec_s32t(struct snmp_pbuf_stream *pbuf_stream, u16_t len, s32_t *value) +{ +#if BYTE_ORDER == LITTLE_ENDIAN + u8_t *lsb_ptr = (u8_t*)value; +#endif +#if BYTE_ORDER == BIG_ENDIAN + u8_t *lsb_ptr = (u8_t*)value + sizeof(s32_t) - 1; +#endif + u8_t sign; + u8_t data; + + if ((len > 0) && (len < 5)) { + PBUF_OP_EXEC(snmp_pbuf_stream_read(pbuf_stream, &data)); + len--; + + if (data & 0x80) { + /* negative, start from -1 */ + *value = -1; + sign = 1; + *lsb_ptr &= data; + } else { + /* positive, start from 0 */ + *value = 0; + sign = 0; + *lsb_ptr |= data; + } + + /* OR/AND octets with value */ + while (len > 0) { + PBUF_OP_EXEC(snmp_pbuf_stream_read(pbuf_stream, &data)); + len--; + +#if BYTE_ORDER == LITTLE_ENDIAN + *value <<= 8; +#endif +#if BYTE_ORDER == BIG_ENDIAN + *value >>= 8; +#endif + + if (sign) { + *lsb_ptr |= 255; + *lsb_ptr &= data; + } else { + *lsb_ptr |= data; + } + } + + return ERR_OK; + } + + return ERR_VAL; +} + +/** + * Decodes object identifier from incoming message into array of u32_t. + * + * @param pbuf_stream points to a pbuf stream + * @param len length of the coded object identifier + * @param oid return decoded object identifier + * @param oid_len return decoded object identifier length + * @param oid_max_len size of oid buffer + * @return ERR_OK if successful, ERR_ARG if we can't (or won't) decode + */ +err_t +snmp_asn1_dec_oid(struct snmp_pbuf_stream *pbuf_stream, u16_t len, u32_t* oid, u8_t* oid_len, u8_t oid_max_len) +{ + u32_t *oid_ptr; + u8_t data; + + *oid_len = 0; + oid_ptr = oid; + if (len > 0) { + if (oid_max_len < 2) { + return ERR_MEM; + } + + PBUF_OP_EXEC(snmp_pbuf_stream_read(pbuf_stream, &data)); + len--; + + /* first compressed octet */ + if (data == 0x2B) { + /* (most) common case 1.3 (iso.org) */ + *oid_ptr = 1; + oid_ptr++; + *oid_ptr = 3; + oid_ptr++; + } else if (data < 40) { + *oid_ptr = 0; + oid_ptr++; + *oid_ptr = data; + oid_ptr++; + } else if (data < 80) { + *oid_ptr = 1; + oid_ptr++; + *oid_ptr = data - 40; + oid_ptr++; + } else { + *oid_ptr = 2; + oid_ptr++; + *oid_ptr = data - 80; + oid_ptr++; + } + *oid_len = 2; + } else { + /* accepting zero length identifiers e.g. for getnext operation. uncommon but valid */ + return ERR_OK; + } + + while ((len > 0) && (*oid_len < oid_max_len)) { + PBUF_OP_EXEC(snmp_pbuf_stream_read(pbuf_stream, &data)); + len--; + + if ((data & 0x80) == 0x00) { + /* sub-identifier uses single octet */ + *oid_ptr = data; + } else { + /* sub-identifier uses multiple octets */ + u32_t sub_id = (data & ~0x80); + while ((len > 0) && ((data & 0x80) != 0)) { + PBUF_OP_EXEC(snmp_pbuf_stream_read(pbuf_stream, &data)); + len--; + + sub_id = (sub_id << 7) + (data & ~0x80); + } + + if ((data & 0x80) != 0) { + /* "more bytes following" bit still set at end of len */ + return ERR_VAL; + } + *oid_ptr = sub_id; + } + oid_ptr++; + (*oid_len)++; + } + + if (len > 0) { + /* OID to long to fit in our buffer */ + return ERR_MEM; + } + + return ERR_OK; +} + +/** + * Decodes (copies) raw data (ip-addresses, octet strings, opaque encoding) + * from incoming message into array. + * + * @param pbuf_stream points to a pbuf stream + * @param len length of the coded raw data (zero is valid, e.g. empty string!) + * @param buf return raw bytes + * @param buf_len returns length of the raw return value + * @param buf_max_len buffer size + * @return ERR_OK if successful, ERR_ARG if we can't (or won't) decode + */ +err_t +snmp_asn1_dec_raw(struct snmp_pbuf_stream *pbuf_stream, u16_t len, u8_t *buf, u16_t* buf_len, u16_t buf_max_len) +{ + if (len > buf_max_len) { + /* not enough dst space */ + return ERR_MEM; + } + *buf_len = len; + + while (len > 0) { + PBUF_OP_EXEC(snmp_pbuf_stream_read(pbuf_stream, buf)); + buf++; + len--; + } + + return ERR_OK; +} + +#endif /* LWIP_SNMP */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_asn1.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_asn1.h new file mode 100644 index 0000000..ec50d8c --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_asn1.h @@ -0,0 +1,108 @@ +/** + * @file + * Abstract Syntax Notation One (ISO 8824, 8825) codec. + */ + +/* + * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands. + * Copyright (c) 2016 Elias Oenal. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Christiaan Simons <christiaan.simons@axon.tv> + * Martin Hentschel <info@cl-soft.de> + * Elias Oenal <lwip@eliasoenal.com> + */ + +#ifndef LWIP_HDR_APPS_SNMP_ASN1_H +#define LWIP_HDR_APPS_SNMP_ASN1_H + +#include "lwip/apps/snmp_opts.h" + +#if LWIP_SNMP + +#include "lwip/err.h" +#include "lwip/apps/snmp_core.h" +#include "snmp_pbuf_stream.h" + +#ifdef __cplusplus +extern "C" { +#endif + +#define SNMP_ASN1_TLV_INDEFINITE_LENGTH 0x80 + +#define SNMP_ASN1_CLASS_MASK 0xC0 +#define SNMP_ASN1_CONTENTTYPE_MASK 0x20 +#define SNMP_ASN1_DATATYPE_MASK 0x1F +#define SNMP_ASN1_DATATYPE_EXTENDED 0x1F /* DataType indicating that datatype is encoded in following bytes */ + +/* context specific (SNMP) tags (from SNMP spec. RFC1157) */ +#define SNMP_ASN1_CONTEXT_PDU_GET_REQ 0 +#define SNMP_ASN1_CONTEXT_PDU_GET_NEXT_REQ 1 +#define SNMP_ASN1_CONTEXT_PDU_GET_RESP 2 +#define SNMP_ASN1_CONTEXT_PDU_SET_REQ 3 +#define SNMP_ASN1_CONTEXT_PDU_TRAP 4 +#define SNMP_ASN1_CONTEXT_PDU_GET_BULK_REQ 5 + +#define SNMP_ASN1_CONTEXT_VARBIND_NO_SUCH_OBJECT 0 +#define SNMP_ASN1_CONTEXT_VARBIND_END_OF_MIB_VIEW 2 + +struct snmp_asn1_tlv +{ + u8_t type; /* only U8 because extended types are not specified by SNMP */ + u8_t type_len; /* encoded length of 'type' field (normally 1) */ + u8_t length_len; /* indicates how many bytes are required to encode the 'value_len' field */ + u16_t value_len; /* encoded length of the value */ +}; +#define SNMP_ASN1_TLV_HDR_LENGTH(tlv) ((tlv).type_len + (tlv).length_len) +#define SNMP_ASN1_TLV_LENGTH(tlv) ((tlv).type_len + (tlv).length_len + (tlv).value_len) +#define SNMP_ASN1_SET_TLV_PARAMS(tlv, type_, length_len_, value_len_) do { (tlv).type = (type_); (tlv).type_len = 0; (tlv).length_len = (length_len_); (tlv).value_len = (value_len_); } while (0); + +err_t snmp_asn1_dec_tlv(struct snmp_pbuf_stream* pbuf_stream, struct snmp_asn1_tlv* tlv); +err_t snmp_asn1_dec_u32t(struct snmp_pbuf_stream *pbuf_stream, u16_t len, u32_t *value); +err_t snmp_asn1_dec_u64t(struct snmp_pbuf_stream *pbuf_stream, u16_t len, u32_t *value); +err_t snmp_asn1_dec_s32t(struct snmp_pbuf_stream *pbuf_stream, u16_t len, s32_t *value); +err_t snmp_asn1_dec_oid(struct snmp_pbuf_stream *pbuf_stream, u16_t len, u32_t* oid, u8_t* oid_len, u8_t oid_max_len); +err_t snmp_asn1_dec_raw(struct snmp_pbuf_stream *pbuf_stream, u16_t len, u8_t *buf, u16_t* buf_len, u16_t buf_max_len); + +err_t snmp_ans1_enc_tlv(struct snmp_pbuf_stream* pbuf_stream, struct snmp_asn1_tlv* tlv); + +void snmp_asn1_enc_length_cnt(u16_t length, u8_t *octets_needed); +void snmp_asn1_enc_u32t_cnt(u32_t value, u16_t *octets_needed); +void snmp_asn1_enc_u64t_cnt(const u32_t *value, u16_t *octets_needed); +void snmp_asn1_enc_s32t_cnt(s32_t value, u16_t *octets_needed); +void snmp_asn1_enc_oid_cnt(const u32_t *oid, u16_t oid_len, u16_t *octets_needed); +err_t snmp_asn1_enc_oid(struct snmp_pbuf_stream* pbuf_stream, const u32_t *oid, u16_t oid_len); +err_t snmp_asn1_enc_s32t(struct snmp_pbuf_stream* pbuf_stream, u16_t octets_needed, s32_t value); +err_t snmp_asn1_enc_u32t(struct snmp_pbuf_stream* pbuf_stream, u16_t octets_needed, u32_t value); +err_t snmp_asn1_enc_u64t(struct snmp_pbuf_stream* pbuf_stream, u16_t octets_needed, const u32_t* value); +err_t snmp_asn1_enc_raw(struct snmp_pbuf_stream* pbuf_stream, const u8_t *raw, u16_t raw_len); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_SNMP */ + +#endif /* LWIP_HDR_APPS_SNMP_ASN1_H */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_core.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_core.c new file mode 100644 index 0000000..c041833 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_core.c @@ -0,0 +1,1349 @@ +/** + * @file + * MIB tree access/construction functions. + */ + +/* + * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Christiaan Simons <christiaan.simons@axon.tv> + * Martin Hentschel <info@cl-soft.de> +*/ + +/** + * @defgroup snmp SNMPv2c agent + * @ingroup apps + * SNMPv2c compatible agent\n + * There is also a MIB compiler and a MIB viewer in lwIP contrib repository + * (lwip-contrib/apps/LwipMibCompiler).\n + * The agent implements the most important MIB2 MIBs including IPv6 support + * (interfaces, UDP, TCP, SNMP, ICMP, SYSTEM). IP MIB is an older version + * whithout IPv6 statistics (TODO).\n + * Rewritten by Martin Hentschel <info@cl-soft.de> and + * Dirk Ziegelmeier <dziegel@gmx.de>\n + * Work on SNMPv3 has started, but is not finished.\n + * + * 0 Agent Capabilities + * ==================== + * + * Features: + * --------- + * - SNMPv2c support. + * - Low RAM usage - no memory pools, stack only. + * - MIB2 implementation is separated from SNMP stack. + * - Support for multiple MIBs (snmp_set_mibs() call) - e.g. for private MIB. + * - Simple and generic API for MIB implementation. + * - Comfortable node types and helper functions for scalar arrays and tables. + * - Counter64, bit and truthvalue datatype support. + * - Callbacks for SNMP writes e.g. to implement persistency. + * - Runs on two APIs: RAW and netconn. + * - Async API is gone - the stack now supports netconn API instead, + * so blocking operations can be done in MIB calls. + * SNMP runs in a worker thread when netconn API is used. + * - Simplified thread sync support for MIBs - useful when MIBs + * need to access variables shared with other threads where no locking is + * possible. Used in MIB2 to access lwIP stats from lwIP thread. + * + * MIB compiler (code generator): + * ------------------------------ + * - Provided in lwIP contrib repository. + * - Written in C#. MIB viewer used Windows Forms. + * - Developed on Windows with Visual Studio 2010. + * - Can be compiled and used on all platforms with http://www.monodevelop.com/. + * - Based on a heavily modified version of of SharpSnmpLib (a4bd05c6afb4) + * (https://sharpsnmplib.codeplex.com/SourceControl/network/forks/Nemo157/MIBParserUpdate). + * - MIB parser, C file generation framework and LWIP code generation are cleanly + * separated, which means the code may be useful as a base for code generation + * of other SNMP agents. + * + * Notes: + * ------ + * - Stack and MIB compiler were used to implement a Profinet device. + * Compiled/implemented MIBs: LLDP-MIB, LLDP-EXT-DOT3-MIB, LLDP-EXT-PNO-MIB. + * + * SNMPv1 per RFC1157 and SNMPv2c per RFC 3416 + * ------------------------------------------- + * Note the S in SNMP stands for "Simple". Note that "Simple" is + * relative. SNMP is simple compared to the complex ISO network + * management protocols CMIP (Common Management Information Protocol) + * and CMOT (CMip Over Tcp). + * + * MIB II + * ------ + * The standard lwIP stack management information base. + * This is a required MIB, so this is always enabled. + * The groups EGP, CMOT and transmission are disabled by default. + * + * Most mib-2 objects are not writable except: + * sysName, sysLocation, sysContact, snmpEnableAuthenTraps. + * Writing to or changing the ARP and IP address and route + * tables is not possible. + * + * Note lwIP has a very limited notion of IP routing. It currently + * doen't have a route table and doesn't have a notion of the U,G,H flags. + * Instead lwIP uses the interface list with only one default interface + * acting as a single gateway interface (G) for the default route. + * + * The agent returns a "virtual table" with the default route 0.0.0.0 + * for the default interface and network routes (no H) for each + * network interface in the netif_list. + * All routes are considered to be up (U). + * + * Loading additional MIBs + * ----------------------- + * MIBs can only be added in compile-time, not in run-time. + * + * + * 1 Building the Agent + * ==================== + * First of all you'll need to add the following define + * to your local lwipopts.h: + * \#define LWIP_SNMP 1 + * + * and add the source files your makefile. + * + * Note you'll might need to adapt you network driver to update + * the mib2 variables for your interface. + * + * 2 Running the Agent + * =================== + * The following function calls must be made in your program to + * actually get the SNMP agent running. + * + * Before starting the agent you should supply pointers + * for sysContact, sysLocation, and snmpEnableAuthenTraps. + * You can do this by calling + * + * - snmp_mib2_set_syscontact() + * - snmp_mib2_set_syslocation() + * - snmp_set_auth_traps_enabled() + * + * You can register a callback which is called on successful write access: + * snmp_set_write_callback(). + * + * Additionally you may want to set + * + * - snmp_mib2_set_sysdescr() + * - snmp_set_device_enterprise_oid() + * - snmp_mib2_set_sysname() + * + * Also before starting the agent you need to setup + * one or more trap destinations using these calls: + * + * - snmp_trap_dst_enable() + * - snmp_trap_dst_ip_set() + * + * If you need more than MIB2, set the MIBs you want to use + * by snmp_set_mibs(). + * + * Finally, enable the agent by calling snmp_init() + * + * @defgroup snmp_core Core + * @ingroup snmp + * + * @defgroup snmp_traps Traps + * @ingroup snmp + */ + +#include "lwip/apps/snmp_opts.h" + +#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/apps/snmp.h" +#include "lwip/apps/snmp_core.h" +#include "snmp_core_priv.h" +#include "lwip/netif.h" +#include <string.h> + + +#if (LWIP_SNMP && (SNMP_TRAP_DESTINATIONS<=0)) + #error "If you want to use SNMP, you have to define SNMP_TRAP_DESTINATIONS>=1 in your lwipopts.h" +#endif +#if (!LWIP_UDP && LWIP_SNMP) + #error "If you want to use SNMP, you have to define LWIP_UDP=1 in your lwipopts.h" +#endif + +struct snmp_statistics snmp_stats; +static const struct snmp_obj_id snmp_device_enterprise_oid_default = {SNMP_DEVICE_ENTERPRISE_OID_LEN, SNMP_DEVICE_ENTERPRISE_OID}; +static const struct snmp_obj_id* snmp_device_enterprise_oid = &snmp_device_enterprise_oid_default; + +const u32_t snmp_zero_dot_zero_values[] = { 0, 0 }; +const struct snmp_obj_id_const_ref snmp_zero_dot_zero = { LWIP_ARRAYSIZE(snmp_zero_dot_zero_values), snmp_zero_dot_zero_values }; + + +#if SNMP_LWIP_MIB2 +#include "lwip/apps/snmp_mib2.h" +static const struct snmp_mib* const default_mibs[] = { &mib2 }; +static u8_t snmp_num_mibs = 1; +#else +static const struct snmp_mib* const default_mibs[] = { NULL }; +static u8_t snmp_num_mibs = 0; +#endif + +/* List of known mibs */ +static struct snmp_mib const * const *snmp_mibs = default_mibs; + +/** + * @ingroup snmp_core + * Sets the MIBs to use. + * Example: call snmp_set_mibs() as follows: + * static const struct snmp_mib *my_snmp_mibs[] = { + * &mib2, + * &private_mib + * }; + * snmp_set_mibs(my_snmp_mibs, LWIP_ARRAYSIZE(my_snmp_mibs)); + */ +void +snmp_set_mibs(const struct snmp_mib **mibs, u8_t num_mibs) +{ + LWIP_ASSERT("mibs pointer must be != NULL", (mibs != NULL)); + LWIP_ASSERT("num_mibs pointer must be != 0", (num_mibs != 0)); + snmp_mibs = mibs; + snmp_num_mibs = num_mibs; +} + +/** + * @ingroup snmp_core + * 'device enterprise oid' is used for 'device OID' field in trap PDU's (for identification of generating device) + * as well as for value returned by MIB-2 'sysObjectID' field (if internal MIB2 implementation is used). + * The 'device enterprise oid' shall point to an OID located under 'private-enterprises' branch (1.3.6.1.4.1.XXX). If a vendor + * wants to provide a custom object there, he has to get its own enterprise oid from IANA (http://www.iana.org). It + * is not allowed to use LWIP enterprise ID! + * In order to identify a specific device it is recommended to create a dedicated OID for each device type under its own + * enterprise oid. + * e.g. + * device a > 1.3.6.1.4.1.XXX(ent-oid).1(devices).1(device a) + * device b > 1.3.6.1.4.1.XXX(ent-oid).1(devices).2(device b) + * for more details see description of 'sysObjectID' field in RFC1213-MIB + */ +void snmp_set_device_enterprise_oid(const struct snmp_obj_id* device_enterprise_oid) +{ + if (device_enterprise_oid == NULL) { + snmp_device_enterprise_oid = &snmp_device_enterprise_oid_default; + } else { + snmp_device_enterprise_oid = device_enterprise_oid; + } +} + +/** + * @ingroup snmp_core + * Get 'device enterprise oid' + */ +const struct snmp_obj_id* snmp_get_device_enterprise_oid(void) +{ + return snmp_device_enterprise_oid; +} + +#if LWIP_IPV4 +/** + * Conversion from InetAddressIPv4 oid to lwIP ip4_addr + * @param oid points to u32_t ident[4] input + * @param ip points to output struct + */ +u8_t +snmp_oid_to_ip4(const u32_t *oid, ip4_addr_t *ip) +{ + if ((oid[0] > 0xFF) || + (oid[1] > 0xFF) || + (oid[2] > 0xFF) || + (oid[3] > 0xFF)) { + ip4_addr_copy(*ip, *IP4_ADDR_ANY4); + return 0; + } + + IP4_ADDR(ip, oid[0], oid[1], oid[2], oid[3]); + return 1; +} + +/** + * Convert ip4_addr to InetAddressIPv4 (no InetAddressType) + * @param ip points to input struct + * @param oid points to u32_t ident[4] output + */ +void +snmp_ip4_to_oid(const ip4_addr_t *ip, u32_t *oid) +{ + oid[0] = ip4_addr1(ip); + oid[1] = ip4_addr2(ip); + oid[2] = ip4_addr3(ip); + oid[3] = ip4_addr4(ip); +} +#endif /* LWIP_IPV4 */ + +#if LWIP_IPV6 +/** + * Conversion from InetAddressIPv6 oid to lwIP ip6_addr + * @param oid points to u32_t oid[16] input + * @param ip points to output struct + */ +u8_t +snmp_oid_to_ip6(const u32_t *oid, ip6_addr_t *ip) +{ + if ((oid[0] > 0xFF) || + (oid[1] > 0xFF) || + (oid[2] > 0xFF) || + (oid[3] > 0xFF) || + (oid[4] > 0xFF) || + (oid[5] > 0xFF) || + (oid[6] > 0xFF) || + (oid[7] > 0xFF) || + (oid[8] > 0xFF) || + (oid[9] > 0xFF) || + (oid[10] > 0xFF) || + (oid[11] > 0xFF) || + (oid[12] > 0xFF) || + (oid[13] > 0xFF) || + (oid[14] > 0xFF) || + (oid[15] > 0xFF)) { + ip6_addr_set_any(ip); + return 0; + } + + ip->addr[0] = (oid[0] << 24) | (oid[1] << 16) | (oid[2] << 8) | (oid[3] << 0); + ip->addr[1] = (oid[4] << 24) | (oid[5] << 16) | (oid[6] << 8) | (oid[7] << 0); + ip->addr[2] = (oid[8] << 24) | (oid[9] << 16) | (oid[10] << 8) | (oid[11] << 0); + ip->addr[3] = (oid[12] << 24) | (oid[13] << 16) | (oid[14] << 8) | (oid[15] << 0); + return 1; +} + +/** + * Convert ip6_addr to InetAddressIPv6 (no InetAddressType) + * @param ip points to input struct + * @param oid points to u32_t ident[16] output + */ +void +snmp_ip6_to_oid(const ip6_addr_t *ip, u32_t *oid) +{ + oid[0] = (ip->addr[0] & 0xFF000000) >> 24; + oid[1] = (ip->addr[0] & 0x00FF0000) >> 16; + oid[2] = (ip->addr[0] & 0x0000FF00) >> 8; + oid[3] = (ip->addr[0] & 0x000000FF) >> 0; + oid[4] = (ip->addr[1] & 0xFF000000) >> 24; + oid[5] = (ip->addr[1] & 0x00FF0000) >> 16; + oid[6] = (ip->addr[1] & 0x0000FF00) >> 8; + oid[7] = (ip->addr[1] & 0x000000FF) >> 0; + oid[8] = (ip->addr[2] & 0xFF000000) >> 24; + oid[9] = (ip->addr[2] & 0x00FF0000) >> 16; + oid[10] = (ip->addr[2] & 0x0000FF00) >> 8; + oid[11] = (ip->addr[2] & 0x000000FF) >> 0; + oid[12] = (ip->addr[3] & 0xFF000000) >> 24; + oid[13] = (ip->addr[3] & 0x00FF0000) >> 16; + oid[14] = (ip->addr[3] & 0x0000FF00) >> 8; + oid[15] = (ip->addr[3] & 0x000000FF) >> 0; +} +#endif /* LWIP_IPV6 */ + +#if LWIP_IPV4 || LWIP_IPV6 +/** + * Convert to InetAddressType+InetAddress+InetPortNumber + * @param ip IP address + * @param port Port + * @param oid OID + * @return OID length + */ +u8_t +snmp_ip_port_to_oid(const ip_addr_t *ip, u16_t port, u32_t *oid) +{ + u8_t idx; + + idx = snmp_ip_to_oid(ip, oid); + oid[idx] = port; + idx++; + + return idx; +} + +/** + * Convert to InetAddressType+InetAddress + * @param ip IP address + * @param oid OID + * @return OID length + */ +u8_t +snmp_ip_to_oid(const ip_addr_t *ip, u32_t *oid) +{ + if (IP_IS_ANY_TYPE_VAL(*ip)) { + oid[0] = 0; /* any */ + oid[1] = 0; /* no IP OIDs follow */ + return 2; + } else if (IP_IS_V6(ip)) { +#if LWIP_IPV6 + oid[0] = 2; /* ipv6 */ + oid[1] = 16; /* 16 InetAddressIPv6 OIDs follow */ + snmp_ip6_to_oid(ip_2_ip6(ip), &oid[2]); + return 18; +#else /* LWIP_IPV6 */ + return 0; +#endif /* LWIP_IPV6 */ + } else { +#if LWIP_IPV4 + oid[0] = 1; /* ipv4 */ + oid[1] = 4; /* 4 InetAddressIPv4 OIDs follow */ + snmp_ip4_to_oid(ip_2_ip4(ip), &oid[2]); + return 6; +#else /* LWIP_IPV4 */ + return 0; +#endif /* LWIP_IPV4 */ + } +} + +/** + * Convert from InetAddressType+InetAddress to ip_addr_t + * @param oid OID + * @param oid_len OID length + * @param ip IP address + * @return Parsed OID length + */ +u8_t +snmp_oid_to_ip(const u32_t *oid, u8_t oid_len, ip_addr_t *ip) +{ + /* InetAddressType */ + if (oid_len < 1) { + return 0; + } + + if (oid[0] == 0) { /* any */ + /* 1x InetAddressType, 1x OID len */ + if (oid_len < 2) { + return 0; + } + if (oid[1] != 0) { + return 0; + } + + memset(ip, 0, sizeof(*ip)); + IP_SET_TYPE(ip, IPADDR_TYPE_ANY); + + return 2; + } else if (oid[0] == 1) { /* ipv4 */ +#if LWIP_IPV4 + /* 1x InetAddressType, 1x OID len, 4x InetAddressIPv4 */ + if (oid_len < 6) { + return 0; + } + + /* 4x ipv4 OID */ + if (oid[1] != 4) { + return 0; + } + + IP_SET_TYPE(ip, IPADDR_TYPE_V4); + if (!snmp_oid_to_ip4(&oid[2], ip_2_ip4(ip))) { + return 0; + } + + return 6; +#else /* LWIP_IPV4 */ + return 0; +#endif /* LWIP_IPV4 */ + } else if (oid[0] == 2) { /* ipv6 */ +#if LWIP_IPV6 + /* 1x InetAddressType, 1x OID len, 16x InetAddressIPv6 */ + if (oid_len < 18) { + return 0; + } + + /* 16x ipv6 OID */ + if (oid[1] != 16) { + return 0; + } + + IP_SET_TYPE(ip, IPADDR_TYPE_V6); + if (!snmp_oid_to_ip6(&oid[2], ip_2_ip6(ip))) { + return 0; + } + + return 18; +#else /* LWIP_IPV6 */ + return 0; +#endif /* LWIP_IPV6 */ + } else { /* unsupported InetAddressType */ + return 0; + } +} + +/** + * Convert from InetAddressType+InetAddress+InetPortNumber to ip_addr_t and u16_t + * @param oid OID + * @param oid_len OID length + * @param ip IP address + * @param port Port + * @return Parsed OID length + */ +u8_t +snmp_oid_to_ip_port(const u32_t *oid, u8_t oid_len, ip_addr_t *ip, u16_t *port) +{ + u8_t idx = 0; + + /* InetAddressType + InetAddress */ + idx += snmp_oid_to_ip(&oid[idx], oid_len-idx, ip); + if (idx == 0) { + return 0; + } + + /* InetPortNumber */ + if (oid_len < (idx+1)) { + return 0; + } + if (oid[idx] > 0xffff) { + return 0; + } + *port = (u16_t)oid[idx]; + idx++; + + return idx; +} + +#endif /* LWIP_IPV4 || LWIP_IPV6 */ + +/** + * Assign an OID to struct snmp_obj_id + * @param target Assignment target + * @param oid OID + * @param oid_len OID length + */ +void +snmp_oid_assign(struct snmp_obj_id* target, const u32_t *oid, u8_t oid_len) +{ + LWIP_ASSERT("oid_len <= LWIP_SNMP_OBJ_ID_LEN", oid_len <= SNMP_MAX_OBJ_ID_LEN); + + target->len = oid_len; + + if (oid_len > 0) { + MEMCPY(target->id, oid, oid_len * sizeof(u32_t)); + } +} + +/** + * Prefix an OID to OID in struct snmp_obj_id + * @param target Assignment target to prefix + * @param oid OID + * @param oid_len OID length + */ +void +snmp_oid_prefix(struct snmp_obj_id* target, const u32_t *oid, u8_t oid_len) +{ + LWIP_ASSERT("target->len + oid_len <= LWIP_SNMP_OBJ_ID_LEN", (target->len + oid_len) <= SNMP_MAX_OBJ_ID_LEN); + + if (oid_len > 0) { + /* move existing OID to make room at the beginning for OID to insert */ + int i; + for (i = target->len-1; i>=0; i--) { + target->id[i + oid_len] = target->id[i]; + } + + /* paste oid at the beginning */ + MEMCPY(target->id, oid, oid_len * sizeof(u32_t)); + } +} + +/** + * Combine two OIDs into struct snmp_obj_id + * @param target Assignmet target + * @param oid1 OID 1 + * @param oid1_len OID 1 length + * @param oid2 OID 2 + * @param oid2_len OID 2 length + */ +void +snmp_oid_combine(struct snmp_obj_id* target, const u32_t *oid1, u8_t oid1_len, const u32_t *oid2, u8_t oid2_len) +{ + snmp_oid_assign(target, oid1, oid1_len); + snmp_oid_append(target, oid2, oid2_len); +} + +/** + * Append OIDs to struct snmp_obj_id + * @param target Assignment target to append to + * @param oid OID + * @param oid_len OID length + */ +void +snmp_oid_append(struct snmp_obj_id* target, const u32_t *oid, u8_t oid_len) +{ + LWIP_ASSERT("offset + oid_len <= LWIP_SNMP_OBJ_ID_LEN", (target->len + oid_len) <= SNMP_MAX_OBJ_ID_LEN); + + if (oid_len > 0) { + MEMCPY(&target->id[target->len], oid, oid_len * sizeof(u32_t)); + target->len += oid_len; + } +} + +/** + * Compare two OIDs + * @param oid1 OID 1 + * @param oid1_len OID 1 length + * @param oid2 OID 2 + * @param oid2_len OID 2 length + * @return -1: OID1<OID2 1: OID1 >OID2 0: equal + */ +s8_t +snmp_oid_compare(const u32_t *oid1, u8_t oid1_len, const u32_t *oid2, u8_t oid2_len) +{ + u8_t level = 0; + LWIP_ASSERT("'oid1' param must not be NULL or 'oid1_len' param be 0!", (oid1 != NULL) || (oid1_len == 0)); + LWIP_ASSERT("'oid2' param must not be NULL or 'oid2_len' param be 0!", (oid2 != NULL) || (oid2_len == 0)); + + while ((level < oid1_len) && (level < oid2_len)) { + if (*oid1 < *oid2) { + return -1; + } + if (*oid1 > *oid2) { + return 1; + } + + level++; + oid1++; + oid2++; + } + + /* common part of both OID's is equal, compare length */ + if (oid1_len < oid2_len) { + return -1; + } + if (oid1_len > oid2_len) { + return 1; + } + + /* they are equal */ + return 0; +} + + +/** + * Check of two OIDs are equal + * @param oid1 OID 1 + * @param oid1_len OID 1 length + * @param oid2 OID 2 + * @param oid2_len OID 2 length + * @return 1: equal 0: non-equal + */ +u8_t +snmp_oid_equal(const u32_t *oid1, u8_t oid1_len, const u32_t *oid2, u8_t oid2_len) +{ + return (snmp_oid_compare(oid1, oid1_len, oid2, oid2_len) == 0)? 1 : 0; +} + +/** + * Convert netif to interface index + * @param netif netif + * @return index + */ +u8_t +netif_to_num(const struct netif *netif) +{ + u8_t result = 0; + struct netif *netif_iterator = netif_list; + + while (netif_iterator != NULL) { + result++; + + if (netif_iterator == netif) { + return result; + } + + netif_iterator = netif_iterator->next; + } + + LWIP_ASSERT("netif not found in netif_list", 0); + return 0; +} + +static const struct snmp_mib* +snmp_get_mib_from_oid(const u32_t *oid, u8_t oid_len) +{ + const u32_t* list_oid; + const u32_t* searched_oid; + u8_t i, l; + + u8_t max_match_len = 0; + const struct snmp_mib* matched_mib = NULL; + + LWIP_ASSERT("'oid' param must not be NULL!", (oid != NULL)); + + if (oid_len == 0) { + return NULL; + } + + for (i = 0; i < snmp_num_mibs; i++) { + LWIP_ASSERT("MIB array not initialized correctly", (snmp_mibs[i] != NULL)); + LWIP_ASSERT("MIB array not initialized correctly - base OID is NULL", (snmp_mibs[i]->base_oid != NULL)); + + if (oid_len >= snmp_mibs[i]->base_oid_len) { + l = snmp_mibs[i]->base_oid_len; + list_oid = snmp_mibs[i]->base_oid; + searched_oid = oid; + + while (l > 0) { + if (*list_oid != *searched_oid) { + break; + } + + l--; + list_oid++; + searched_oid++; + } + + if ((l == 0) && (snmp_mibs[i]->base_oid_len > max_match_len)) { + max_match_len = snmp_mibs[i]->base_oid_len; + matched_mib = snmp_mibs[i]; + } + } + } + + return matched_mib; +} + +static const struct snmp_mib* +snmp_get_next_mib(const u32_t *oid, u8_t oid_len) +{ + u8_t i; + const struct snmp_mib* next_mib = NULL; + + LWIP_ASSERT("'oid' param must not be NULL!", (oid != NULL)); + + if (oid_len == 0) { + return NULL; + } + + for (i = 0; i < snmp_num_mibs; i++) { + if (snmp_mibs[i]->base_oid != NULL) { + /* check if mib is located behind starting point */ + if (snmp_oid_compare(snmp_mibs[i]->base_oid, snmp_mibs[i]->base_oid_len, oid, oid_len) > 0) { + if ((next_mib == NULL) || + (snmp_oid_compare(snmp_mibs[i]->base_oid, snmp_mibs[i]->base_oid_len, + next_mib->base_oid, next_mib->base_oid_len) < 0)) { + next_mib = snmp_mibs[i]; + } + } + } + } + + return next_mib; +} + +static const struct snmp_mib* +snmp_get_mib_between(const u32_t *oid1, u8_t oid1_len, const u32_t *oid2, u8_t oid2_len) +{ + const struct snmp_mib* next_mib = snmp_get_next_mib(oid1, oid1_len); + + LWIP_ASSERT("'oid2' param must not be NULL!", (oid2 != NULL)); + LWIP_ASSERT("'oid2_len' param must be greater than 0!", (oid2_len > 0)); + + if (next_mib != NULL) { + if (snmp_oid_compare(next_mib->base_oid, next_mib->base_oid_len, oid2, oid2_len) < 0) { + return next_mib; + } + } + + return NULL; +} + +u8_t +snmp_get_node_instance_from_oid(const u32_t *oid, u8_t oid_len, struct snmp_node_instance* node_instance) +{ + u8_t result = SNMP_ERR_NOSUCHOBJECT; + const struct snmp_mib *mib; + const struct snmp_node *mn = NULL; + + mib = snmp_get_mib_from_oid(oid, oid_len); + if (mib != NULL) { + u8_t oid_instance_len; + + mn = snmp_mib_tree_resolve_exact(mib, oid, oid_len, &oid_instance_len); + if ((mn != NULL) && (mn->node_type != SNMP_NODE_TREE)) { + /* get instance */ + const struct snmp_leaf_node* leaf_node = (const struct snmp_leaf_node*)(const void*)mn; + + node_instance->node = mn; + snmp_oid_assign(&node_instance->instance_oid, oid + (oid_len - oid_instance_len), oid_instance_len); + + result = leaf_node->get_instance( + oid, + oid_len - oid_instance_len, + node_instance); + +#ifdef LWIP_DEBUG + if (result == SNMP_ERR_NOERROR) { + if (((node_instance->access & SNMP_NODE_INSTANCE_ACCESS_READ) != 0) && (node_instance->get_value == NULL)) { + LWIP_DEBUGF(SNMP_DEBUG, ("SNMP inconsistent access: node is readable but no get_value function is specified\n")); + } + if (((node_instance->access & SNMP_NODE_INSTANCE_ACCESS_WRITE) != 0) && (node_instance->set_value == NULL)) { + LWIP_DEBUGF(SNMP_DEBUG, ("SNMP inconsistent access: node is writable but no set_value and/or set_test function is specified\n")); + } + } +#endif + } + } + + return result; +} + +u8_t +snmp_get_next_node_instance_from_oid(const u32_t *oid, u8_t oid_len, snmp_validate_node_instance_method validate_node_instance_method, void* validate_node_instance_arg, struct snmp_obj_id* node_oid, struct snmp_node_instance* node_instance) +{ + const struct snmp_mib *mib; + const struct snmp_node *mn = NULL; + const u32_t* start_oid = NULL; + u8_t start_oid_len = 0; + + /* resolve target MIB from passed OID */ + mib = snmp_get_mib_from_oid(oid, oid_len); + if (mib == NULL) { + /* passed OID does not reference any known MIB, start at the next closest MIB */ + mib = snmp_get_next_mib(oid, oid_len); + + if (mib != NULL) { + start_oid = mib->base_oid; + start_oid_len = mib->base_oid_len; + } + } else { + start_oid = oid; + start_oid_len = oid_len; + } + + /* resolve target node from MIB, skip to next MIB if no suitable node is found in current MIB */ + while ((mib != NULL) && (mn == NULL)) { + u8_t oid_instance_len; + + /* check if OID directly references a node inside current MIB, in this case we have to ask this node for the next instance */ + mn = snmp_mib_tree_resolve_exact(mib, start_oid, start_oid_len, &oid_instance_len); + if (mn != NULL) { + snmp_oid_assign(node_oid, start_oid, start_oid_len - oid_instance_len); /* set oid to node */ + snmp_oid_assign(&node_instance->instance_oid, start_oid + (start_oid_len - oid_instance_len), oid_instance_len); /* set (relative) instance oid */ + } else { + /* OID does not reference a node, search for the next closest node inside MIB; set instance_oid.len to zero because we want the first instance of this node */ + mn = snmp_mib_tree_resolve_next(mib, start_oid, start_oid_len, node_oid); + node_instance->instance_oid.len = 0; + } + + /* validate the node; if the node has no further instance or the returned instance is invalid, search for the next in MIB and validate again */ + node_instance->node = mn; + while (mn != NULL) { + u8_t result; + + /* clear fields which may have values from previous loops */ + node_instance->asn1_type = 0; + node_instance->access = SNMP_NODE_INSTANCE_NOT_ACCESSIBLE; + node_instance->get_value = NULL; + node_instance->set_test = NULL; + node_instance->set_value = NULL; + node_instance->release_instance = NULL; + node_instance->reference.ptr = NULL; + node_instance->reference_len = 0; + + result = ((const struct snmp_leaf_node*)(const void*)mn)->get_next_instance( + node_oid->id, + node_oid->len, + node_instance); + + if (result == SNMP_ERR_NOERROR) { +#ifdef LWIP_DEBUG + if (((node_instance->access & SNMP_NODE_INSTANCE_ACCESS_READ) != 0) && (node_instance->get_value == NULL)) { + LWIP_DEBUGF(SNMP_DEBUG, ("SNMP inconsistent access: node is readable but no get_value function is specified\n")); + } + if (((node_instance->access & SNMP_NODE_INSTANCE_ACCESS_WRITE) != 0) && (node_instance->set_value == NULL)) { + LWIP_DEBUGF(SNMP_DEBUG, ("SNMP inconsistent access: node is writable but no set_value function is specified\n")); + } +#endif + + /* validate node because the node may be not accessible for example (but let the caller decide what is valid */ + if ((validate_node_instance_method == NULL) || + (validate_node_instance_method(node_instance, validate_node_instance_arg) == SNMP_ERR_NOERROR)) { + /* node_oid "returns" the full result OID (including the instance part) */ + snmp_oid_append(node_oid, node_instance->instance_oid.id, node_instance->instance_oid.len); + break; + } + + if (node_instance->release_instance != NULL) { + node_instance->release_instance(node_instance); + } + /* + the instance itself is not valid, ask for next instance from same node. + we don't have to change any variables because node_instance->instance_oid is used as input (starting point) + as well as output (resulting next OID), so we have to simply call get_next_instance method again + */ + } else { + if (node_instance->release_instance != NULL) { + node_instance->release_instance(node_instance); + } + + /* the node has no further instance, skip to next node */ + mn = snmp_mib_tree_resolve_next(mib, node_oid->id, node_oid->len, &node_instance->instance_oid); /* misuse node_instance->instance_oid as tmp buffer */ + if (mn != NULL) { + /* prepare for next loop */ + snmp_oid_assign(node_oid, node_instance->instance_oid.id, node_instance->instance_oid.len); + node_instance->instance_oid.len = 0; + node_instance->node = mn; + } + } + } + + if (mn != NULL) { + /* + we found a suitable next node, + now we have to check if a inner MIB is located between the searched OID and the resulting OID. + this is possible because MIB's may be located anywhere in the global tree, that means also in + the subtree of another MIB (e.g. if searched OID is .2 and resulting OID is .4, then another + MIB having .3 as root node may exist) + */ + const struct snmp_mib *intermediate_mib; + intermediate_mib = snmp_get_mib_between(start_oid, start_oid_len, node_oid->id, node_oid->len); + + if (intermediate_mib != NULL) { + /* search for first node inside intermediate mib in next loop */ + if (node_instance->release_instance != NULL) { + node_instance->release_instance(node_instance); + } + + mn = NULL; + mib = intermediate_mib; + start_oid = mib->base_oid; + start_oid_len = mib->base_oid_len; + } + /* else { we found out target node } */ + } else { + /* + there is no further (suitable) node inside this MIB, search for the next MIB with following priority + 1. search for inner MIB's (whose root is located inside tree of current MIB) + 2. search for surrouding MIB's (where the current MIB is the inner MIB) and continue there if any + 3. take the next closest MIB (not being related to the current MIB) + */ + const struct snmp_mib *next_mib; + next_mib = snmp_get_next_mib(start_oid, start_oid_len); /* returns MIB's related to point 1 and 3 */ + + /* is the found MIB an inner MIB? (point 1) */ + if ((next_mib != NULL) && (next_mib->base_oid_len > mib->base_oid_len) && + (snmp_oid_compare(next_mib->base_oid, mib->base_oid_len, mib->base_oid, mib->base_oid_len) == 0)) { + /* yes it is -> continue at inner MIB */ + mib = next_mib; + start_oid = mib->base_oid; + start_oid_len = mib->base_oid_len; + } else { + /* check if there is a surrounding mib where to continue (point 2) (only possible if OID length > 1) */ + if (mib->base_oid_len > 1) { + mib = snmp_get_mib_from_oid(mib->base_oid, mib->base_oid_len - 1); + + if (mib == NULL) { + /* no surrounding mib, use next mib encountered above (point 3) */ + mib = next_mib; + + if (mib != NULL) { + start_oid = mib->base_oid; + start_oid_len = mib->base_oid_len; + } + } + /* else { start_oid stays the same because we want to continue from current offset in surrounding mib (point 2) } */ + } + } + } + } + + if (mib == NULL) { + /* loop is only left when mib == null (error) or mib_node != NULL (success) */ + return SNMP_ERR_ENDOFMIBVIEW; + } + + return SNMP_ERR_NOERROR; +} + +/** + * Searches tree for the supplied object identifier. + * + */ +const struct snmp_node * +snmp_mib_tree_resolve_exact(const struct snmp_mib *mib, const u32_t *oid, u8_t oid_len, u8_t* oid_instance_len) +{ + const struct snmp_node* const* node = &mib->root_node; + u8_t oid_offset = mib->base_oid_len; + + while ((oid_offset < oid_len) && ((*node)->node_type == SNMP_NODE_TREE)) { + /* search for matching sub node */ + u32_t subnode_oid = *(oid + oid_offset); + + u32_t i = (*(const struct snmp_tree_node* const*)node)->subnode_count; + node = (*(const struct snmp_tree_node* const*)node)->subnodes; + while ((i > 0) && ((*node)->oid != subnode_oid)) { + node++; + i--; + } + + if (i == 0) { + /* no matching subnode found */ + return NULL; + } + + oid_offset++; + } + + if ((*node)->node_type != SNMP_NODE_TREE) { + /* we found a leaf node */ + *oid_instance_len = oid_len - oid_offset; + return (*node); + } + + return NULL; +} + +const struct snmp_node* +snmp_mib_tree_resolve_next(const struct snmp_mib *mib, const u32_t *oid, u8_t oid_len, struct snmp_obj_id* oidret) +{ + u8_t oid_offset = mib->base_oid_len; + const struct snmp_node* const* node; + const struct snmp_tree_node* node_stack[SNMP_MAX_OBJ_ID_LEN]; + s32_t nsi = 0; /* NodeStackIndex */ + u32_t subnode_oid; + + if (mib->root_node->node_type != SNMP_NODE_TREE) { + /* a next operation on a mib with only a leaf node will always return NULL because there is no other node */ + return NULL; + } + + /* first build node stack related to passed oid (as far as possible), then go backwards to determine the next node */ + node_stack[nsi] = (const struct snmp_tree_node*)(const void*)mib->root_node; + while (oid_offset < oid_len) { + /* search for matching sub node */ + u32_t i = node_stack[nsi]->subnode_count; + node = node_stack[nsi]->subnodes; + + subnode_oid = *(oid + oid_offset); + + while ((i > 0) && ((*node)->oid != subnode_oid)) { + node++; + i--; + } + + if ((i == 0) || ((*node)->node_type != SNMP_NODE_TREE)) { + /* no (matching) tree-subnode found */ + break; + } + nsi++; + node_stack[nsi] = (const struct snmp_tree_node*)(const void*)(*node); + + oid_offset++; + } + + + if (oid_offset >= oid_len) { + /* passed oid references a tree node -> return first useable sub node of it */ + subnode_oid = 0; + } else { + subnode_oid = *(oid + oid_offset) + 1; + } + + while (nsi >= 0) { + const struct snmp_node* subnode = NULL; + + /* find next node on current level */ + s32_t i = node_stack[nsi]->subnode_count; + node = node_stack[nsi]->subnodes; + while (i > 0) { + if ((*node)->oid == subnode_oid) { + subnode = *node; + break; + } else if (((*node)->oid > subnode_oid) && ((subnode == NULL) || ((*node)->oid < subnode->oid))) { + subnode = *node; + } + + node++; + i--; + } + + if (subnode == NULL) { + /* no further node found on this level, go one level up and start searching with index of current node*/ + subnode_oid = node_stack[nsi]->node.oid + 1; + nsi--; + } else { + if (subnode->node_type == SNMP_NODE_TREE) { + /* next is a tree node, go into it and start searching */ + nsi++; + node_stack[nsi] = (const struct snmp_tree_node*)(const void*)subnode; + subnode_oid = 0; + } else { + /* we found a leaf node -> fill oidret and return it */ + snmp_oid_assign(oidret, mib->base_oid, mib->base_oid_len); + i = 1; + while (i <= nsi) { + oidret->id[oidret->len] = node_stack[i]->node.oid; + oidret->len++; + i++; + } + + oidret->id[oidret->len] = subnode->oid; + oidret->len++; + + return subnode; + } + } + } + + return NULL; +} + +/** initialize struct next_oid_state using this function before passing it to next_oid_check */ +void +snmp_next_oid_init(struct snmp_next_oid_state *state, + const u32_t *start_oid, u8_t start_oid_len, + u32_t *next_oid_buf, u8_t next_oid_max_len) +{ + state->start_oid = start_oid; + state->start_oid_len = start_oid_len; + state->next_oid = next_oid_buf; + state->next_oid_len = 0; + state->next_oid_max_len = next_oid_max_len; + state->status = SNMP_NEXT_OID_STATUS_NO_MATCH; +} + +/** checks if the passed incomplete OID may be a possible candidate for snmp_next_oid_check(); +this methid is intended if the complete OID is not yet known but it is very expensive to build it up, +so it is possible to test the starting part before building up the complete oid and pass it to snmp_next_oid_check()*/ +u8_t +snmp_next_oid_precheck(struct snmp_next_oid_state *state, const u32_t *oid, const u8_t oid_len) +{ + if (state->status != SNMP_NEXT_OID_STATUS_BUF_TO_SMALL) { + u8_t start_oid_len = (oid_len < state->start_oid_len) ? oid_len : state->start_oid_len; + + /* check passed OID is located behind start offset */ + if (snmp_oid_compare(oid, oid_len, state->start_oid, start_oid_len) >= 0) { + /* check if new oid is located closer to start oid than current closest oid */ + if ((state->status == SNMP_NEXT_OID_STATUS_NO_MATCH) || + (snmp_oid_compare(oid, oid_len, state->next_oid, state->next_oid_len) < 0)) { + return 1; + } + } + } + + return 0; +} + +/** checks the passed OID if it is a candidate to be the next one (get_next); returns !=0 if passed oid is currently closest, otherwise 0 */ +u8_t +snmp_next_oid_check(struct snmp_next_oid_state *state, const u32_t *oid, const u8_t oid_len, void* reference) +{ + /* do not overwrite a fail result */ + if (state->status != SNMP_NEXT_OID_STATUS_BUF_TO_SMALL) { + /* check passed OID is located behind start offset */ + if (snmp_oid_compare(oid, oid_len, state->start_oid, state->start_oid_len) > 0) { + /* check if new oid is located closer to start oid than current closest oid */ + if ((state->status == SNMP_NEXT_OID_STATUS_NO_MATCH) || + (snmp_oid_compare(oid, oid_len, state->next_oid, state->next_oid_len) < 0)) { + if (oid_len <= state->next_oid_max_len) { + MEMCPY(state->next_oid, oid, oid_len * sizeof(u32_t)); + state->next_oid_len = oid_len; + state->status = SNMP_NEXT_OID_STATUS_SUCCESS; + state->reference = reference; + return 1; + } else { + state->status = SNMP_NEXT_OID_STATUS_BUF_TO_SMALL; + } + } + } + } + + return 0; +} + +u8_t +snmp_oid_in_range(const u32_t *oid_in, u8_t oid_len, const struct snmp_oid_range *oid_ranges, u8_t oid_ranges_len) +{ + u8_t i; + + if (oid_len != oid_ranges_len) { + return 0; + } + + for (i = 0; i < oid_ranges_len; i++) { + if ((oid_in[i] < oid_ranges[i].min) || (oid_in[i] > oid_ranges[i].max)) { + return 0; + } + } + + return 1; +} + +snmp_err_t +snmp_set_test_ok(struct snmp_node_instance* instance, u16_t value_len, void* value) +{ + LWIP_UNUSED_ARG(instance); + LWIP_UNUSED_ARG(value_len); + LWIP_UNUSED_ARG(value); + + return SNMP_ERR_NOERROR; +} + +/** + * Decodes BITS pseudotype value from ASN.1 OctetString. + * + * @note Because BITS pseudo type is encoded as OCTET STRING, it cannot directly + * be encoded/decoded by the agent. Instead call this function as required from + * get/test/set methods. + * + * @param buf points to a buffer holding the ASN1 octet string + * @param buf_len length of octet string + * @param bit_value decoded Bit value with Bit0 == LSB + * @return ERR_OK if successful, ERR_ARG if bit value contains more than 32 bit + */ +err_t +snmp_decode_bits(const u8_t *buf, u32_t buf_len, u32_t *bit_value) +{ + u8_t b; + u8_t bits_processed = 0; + *bit_value = 0; + + while (buf_len > 0) { + /* any bit set in this byte? */ + if (*buf != 0x00) { + if (bits_processed >= 32) { + /* accept more than 4 bytes, but only when no bits are set */ + return ERR_VAL; + } + + b = *buf; + do { + if (b & 0x80) { + *bit_value |= (1 << bits_processed); + } + bits_processed++; + b <<= 1; + } + while ((bits_processed & 0x07) != 0); /* &0x07 -> % 8 */ + } else { + bits_processed += 8; + } + + buf_len--; + buf++; + } + + return ERR_OK; +} + +err_t +snmp_decode_truthvalue(const s32_t *asn1_value, u8_t *bool_value) +{ + /* defined by RFC1443: + TruthValue ::= TEXTUAL-CONVENTION + STATUS current + DESCRIPTION + "Represents a boolean value." + SYNTAX INTEGER { true(1), false(2) } + */ + + if ((asn1_value == NULL) || (bool_value == NULL)) { + return ERR_ARG; + } + + if (*asn1_value == 1) { + *bool_value = 1; + } else if (*asn1_value == 2) { + *bool_value = 0; + } else { + return ERR_VAL; + } + + return ERR_OK; +} + +/** + * Encodes BITS pseudotype value into ASN.1 OctetString. + * + * @note Because BITS pseudo type is encoded as OCTET STRING, it cannot directly + * be encoded/decoded by the agent. Instead call this function as required from + * get/test/set methods. + * + * @param buf points to a buffer where the resulting ASN1 octet string is stored to + * @param buf_len max length of the bufffer + * @param bit_value Bit value to encode with Bit0 == LSB + * @param bit_count Number of possible bits for the bit value (according to rfc we have to send all bits independant from their truth value) + * @return number of bytes used from buffer to store the resulting OctetString + */ +u8_t +snmp_encode_bits(u8_t *buf, u32_t buf_len, u32_t bit_value, u8_t bit_count) +{ + u8_t len = 0; + u8_t min_bytes = (bit_count + 7) >> 3; /* >>3 -> / 8 */ + + while ((buf_len > 0) && (bit_value != 0x00)) { + s8_t i = 7; + *buf = 0x00; + while (i >= 0) { + if (bit_value & 0x01) { + *buf |= 0x01; + } + + if (i > 0) { + *buf <<= 1; + } + + bit_value >>= 1; + i--; + } + + buf++; + buf_len--; + len++; + } + + if (len < min_bytes) { + buf += len; + buf_len -= len; + + while ((len < min_bytes) && (buf_len > 0)) { + *buf = 0x00; + buf++; + buf_len--; + len++; + } + } + + return len; +} + +u8_t +snmp_encode_truthvalue(s32_t *asn1_value, u32_t bool_value) +{ + /* defined by RFC1443: + TruthValue ::= TEXTUAL-CONVENTION + STATUS current + DESCRIPTION + "Represents a boolean value." + SYNTAX INTEGER { true(1), false(2) } + */ + + if (asn1_value == NULL) { + return 0; + } + + if (bool_value) { + *asn1_value = 1; /* defined by RFC1443 */ + } else { + *asn1_value = 2; /* defined by RFC1443 */ + } + + return sizeof(s32_t); +} + +#endif /* LWIP_SNMP */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_core_priv.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_core_priv.h new file mode 100644 index 0000000..5552177 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_core_priv.h @@ -0,0 +1,76 @@ +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Martin Hentschel <info@cl-soft.de> + * + */ + +#ifndef LWIP_HDR_APPS_SNMP_CORE_PRIV_H +#define LWIP_HDR_APPS_SNMP_CORE_PRIV_H + +#include "lwip/apps/snmp_opts.h" + +#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/apps/snmp_core.h" +#include "snmp_asn1.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* (outdated) SNMPv1 error codes + * shall not be used by MIBS anymore, nevertheless required from core for properly answering a v1 request + */ +#define SNMP_ERR_NOSUCHNAME 2 +#define SNMP_ERR_BADVALUE 3 +#define SNMP_ERR_READONLY 4 +/* error codes which are internal and shall not be used by MIBS + * shall not be used by MIBS anymore, nevertheless required from core for properly answering a v1 request + */ +#define SNMP_ERR_TOOBIG 1 +#define SNMP_ERR_AUTHORIZATIONERROR 16 +#define SNMP_ERR_NOSUCHOBJECT SNMP_VARBIND_EXCEPTION_OFFSET + SNMP_ASN1_CONTEXT_VARBIND_NO_SUCH_OBJECT +#define SNMP_ERR_ENDOFMIBVIEW SNMP_VARBIND_EXCEPTION_OFFSET + SNMP_ASN1_CONTEXT_VARBIND_END_OF_MIB_VIEW + + +const struct snmp_node* snmp_mib_tree_resolve_exact(const struct snmp_mib *mib, const u32_t *oid, u8_t oid_len, u8_t* oid_instance_len); +const struct snmp_node* snmp_mib_tree_resolve_next(const struct snmp_mib *mib, const u32_t *oid, u8_t oid_len, struct snmp_obj_id* oidret); + +typedef u8_t (*snmp_validate_node_instance_method)(struct snmp_node_instance*, void*); + +u8_t snmp_get_node_instance_from_oid(const u32_t *oid, u8_t oid_len, struct snmp_node_instance* node_instance); +u8_t snmp_get_next_node_instance_from_oid(const u32_t *oid, u8_t oid_len, snmp_validate_node_instance_method validate_node_instance_method, void* validate_node_instance_arg, struct snmp_obj_id* node_oid, struct snmp_node_instance* node_instance); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_SNMP */ + +#endif /* LWIP_HDR_APPS_SNMP_CORE_PRIV_H */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2.c new file mode 100644 index 0000000..9d8c43c --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2.c @@ -0,0 +1,116 @@ +/** + * @file + * Management Information Base II (RFC1213) objects and functions. + */ + +/* + * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Dirk Ziegelmeier <dziegel@gmx.de> + * Christiaan Simons <christiaan.simons@axon.tv> + */ + +/** + * @defgroup snmp_mib2 MIB2 + * @ingroup snmp + */ + +#include "lwip/apps/snmp_opts.h" + +#if LWIP_SNMP && SNMP_LWIP_MIB2 /* don't build if not configured for use in lwipopts.h */ + +#if !LWIP_STATS +#error LWIP_SNMP MIB2 needs LWIP_STATS (for MIB2) +#endif +#if !MIB2_STATS +#error LWIP_SNMP MIB2 needs MIB2_STATS (for MIB2) +#endif + +#include "lwip/snmp.h" +#include "lwip/apps/snmp.h" +#include "lwip/apps/snmp_core.h" +#include "lwip/apps/snmp_mib2.h" +#include "lwip/apps/snmp_scalar.h" + +#if SNMP_USE_NETCONN +#include "lwip/tcpip.h" +#include "lwip/priv/tcpip_priv.h" +void +snmp_mib2_lwip_synchronizer(snmp_threadsync_called_fn fn, void* arg) +{ +#if LWIP_TCPIP_CORE_LOCKING + LOCK_TCPIP_CORE(); + fn(arg); + UNLOCK_TCPIP_CORE(); +#else + tcpip_callback(fn, arg); +#endif +} + +struct snmp_threadsync_instance snmp_mib2_lwip_locks; +#endif + +/* dot3 and EtherLike MIB not planned. (transmission .1.3.6.1.2.1.10) */ +/* historical (some say hysterical). (cmot .1.3.6.1.2.1.9) */ +/* lwIP has no EGP, thus may not implement it. (egp .1.3.6.1.2.1.8) */ + +/* --- mib-2 .1.3.6.1.2.1 ----------------------------------------------------- */ +extern const struct snmp_scalar_array_node snmp_mib2_snmp_root; +extern const struct snmp_tree_node snmp_mib2_udp_root; +extern const struct snmp_tree_node snmp_mib2_tcp_root; +extern const struct snmp_scalar_array_node snmp_mib2_icmp_root; +extern const struct snmp_tree_node snmp_mib2_interface_root; +extern const struct snmp_scalar_array_node snmp_mib2_system_node; +extern const struct snmp_tree_node snmp_mib2_at_root; +extern const struct snmp_tree_node snmp_mib2_ip_root; + +static const struct snmp_node* const mib2_nodes[] = { + &snmp_mib2_system_node.node.node, + &snmp_mib2_interface_root.node, +#if LWIP_ARP && LWIP_IPV4 + &snmp_mib2_at_root.node, +#endif /* LWIP_ARP && LWIP_IPV4 */ +#if LWIP_IPV4 + &snmp_mib2_ip_root.node, +#endif /* LWIP_IPV4 */ +#if LWIP_ICMP + &snmp_mib2_icmp_root.node.node, +#endif /* LWIP_ICMP */ +#if LWIP_TCP + &snmp_mib2_tcp_root.node, +#endif /* LWIP_TCP */ +#if LWIP_UDP + &snmp_mib2_udp_root.node, +#endif /* LWIP_UDP */ + &snmp_mib2_snmp_root.node.node +}; + +static const struct snmp_tree_node mib2_root = SNMP_CREATE_TREE_NODE(1, mib2_nodes); + +static const u32_t mib2_base_oid_arr[] = { 1,3,6,1,2,1 }; +const struct snmp_mib mib2 = SNMP_MIB_CREATE(mib2_base_oid_arr, &mib2_root.node); + +#endif /* LWIP_SNMP && SNMP_LWIP_MIB2 */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2_icmp.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2_icmp.c new file mode 100644 index 0000000..995bd32 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2_icmp.c @@ -0,0 +1,182 @@ +/** + * @file + * Management Information Base II (RFC1213) ICMP objects and functions. + */ + +/* + * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Dirk Ziegelmeier <dziegel@gmx.de> + * Christiaan Simons <christiaan.simons@axon.tv> + */ + +#include "lwip/snmp.h" +#include "lwip/apps/snmp.h" +#include "lwip/apps/snmp_core.h" +#include "lwip/apps/snmp_mib2.h" +#include "lwip/apps/snmp_table.h" +#include "lwip/apps/snmp_scalar.h" +#include "lwip/icmp.h" +#include "lwip/stats.h" + +#if LWIP_SNMP && SNMP_LWIP_MIB2 && LWIP_ICMP + +#if SNMP_USE_NETCONN +#define SYNC_NODE_NAME(node_name) node_name ## _synced +#define CREATE_LWIP_SYNC_NODE(oid, node_name) \ + static const struct snmp_threadsync_node node_name ## _synced = SNMP_CREATE_THREAD_SYNC_NODE(oid, &node_name.node, &snmp_mib2_lwip_locks); +#else +#define SYNC_NODE_NAME(node_name) node_name +#define CREATE_LWIP_SYNC_NODE(oid, node_name) +#endif + +/* --- icmp .1.3.6.1.2.1.5 ----------------------------------------------------- */ + +static s16_t +icmp_get_value(const struct snmp_scalar_array_node_def *node, void *value) +{ + u32_t *uint_ptr = (u32_t*)value; + + switch (node->oid) { + case 1: /* icmpInMsgs */ + *uint_ptr = STATS_GET(mib2.icmpinmsgs); + return sizeof(*uint_ptr); + case 2: /* icmpInErrors */ + *uint_ptr = STATS_GET(mib2.icmpinerrors); + return sizeof(*uint_ptr); + case 3: /* icmpInDestUnreachs */ + *uint_ptr = STATS_GET(mib2.icmpindestunreachs); + return sizeof(*uint_ptr); + case 4: /* icmpInTimeExcds */ + *uint_ptr = STATS_GET(mib2.icmpintimeexcds); + return sizeof(*uint_ptr); + case 5: /* icmpInParmProbs */ + *uint_ptr = STATS_GET(mib2.icmpinparmprobs); + return sizeof(*uint_ptr); + case 6: /* icmpInSrcQuenchs */ + *uint_ptr = STATS_GET(mib2.icmpinsrcquenchs); + return sizeof(*uint_ptr); + case 7: /* icmpInRedirects */ + *uint_ptr = STATS_GET(mib2.icmpinredirects); + return sizeof(*uint_ptr); + case 8: /* icmpInEchos */ + *uint_ptr = STATS_GET(mib2.icmpinechos); + return sizeof(*uint_ptr); + case 9: /* icmpInEchoReps */ + *uint_ptr = STATS_GET(mib2.icmpinechoreps); + return sizeof(*uint_ptr); + case 10: /* icmpInTimestamps */ + *uint_ptr = STATS_GET(mib2.icmpintimestamps); + return sizeof(*uint_ptr); + case 11: /* icmpInTimestampReps */ + *uint_ptr = STATS_GET(mib2.icmpintimestampreps); + return sizeof(*uint_ptr); + case 12: /* icmpInAddrMasks */ + *uint_ptr = STATS_GET(mib2.icmpinaddrmasks); + return sizeof(*uint_ptr); + case 13: /* icmpInAddrMaskReps */ + *uint_ptr = STATS_GET(mib2.icmpinaddrmaskreps); + return sizeof(*uint_ptr); + case 14: /* icmpOutMsgs */ + *uint_ptr = STATS_GET(mib2.icmpoutmsgs); + return sizeof(*uint_ptr); + case 15: /* icmpOutErrors */ + *uint_ptr = STATS_GET(mib2.icmpouterrors); + return sizeof(*uint_ptr); + case 16: /* icmpOutDestUnreachs */ + *uint_ptr = STATS_GET(mib2.icmpoutdestunreachs); + return sizeof(*uint_ptr); + case 17: /* icmpOutTimeExcds */ + *uint_ptr = STATS_GET(mib2.icmpouttimeexcds); + return sizeof(*uint_ptr); + case 18: /* icmpOutParmProbs: not supported -> always 0 */ + *uint_ptr = 0; + return sizeof(*uint_ptr); + case 19: /* icmpOutSrcQuenchs: not supported -> always 0 */ + *uint_ptr = 0; + return sizeof(*uint_ptr); + case 20: /* icmpOutRedirects: not supported -> always 0 */ + *uint_ptr = 0; + return sizeof(*uint_ptr); + case 21: /* icmpOutEchos */ + *uint_ptr = STATS_GET(mib2.icmpoutechos); + return sizeof(*uint_ptr); + case 22: /* icmpOutEchoReps */ + *uint_ptr = STATS_GET(mib2.icmpoutechoreps); + return sizeof(*uint_ptr); + case 23: /* icmpOutTimestamps: not supported -> always 0 */ + *uint_ptr = 0; + return sizeof(*uint_ptr); + case 24: /* icmpOutTimestampReps: not supported -> always 0 */ + *uint_ptr = 0; + return sizeof(*uint_ptr); + case 25: /* icmpOutAddrMasks: not supported -> always 0 */ + *uint_ptr = 0; + return sizeof(*uint_ptr); + case 26: /* icmpOutAddrMaskReps: not supported -> always 0 */ + *uint_ptr = 0; + return sizeof(*uint_ptr); + default: + LWIP_DEBUGF(SNMP_MIB_DEBUG,("icmp_get_value(): unknown id: %"S32_F"\n", node->oid)); + break; + } + + return 0; +} + + +static const struct snmp_scalar_array_node_def icmp_nodes[] = { + { 1, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + { 2, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + { 3, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + { 4, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + { 5, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + { 6, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + { 7, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + { 8, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + { 9, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + {10, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + {11, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + {12, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + {13, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + {14, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + {15, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + {16, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + {17, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + {18, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + {19, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + {20, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + {21, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + {22, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + {23, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + {24, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + {25, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, + {26, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY} +}; + +const struct snmp_scalar_array_node snmp_mib2_icmp_root = SNMP_SCALAR_CREATE_ARRAY_NODE(5, icmp_nodes, icmp_get_value, NULL, NULL); + +#endif /* LWIP_SNMP && SNMP_LWIP_MIB2 && LWIP_ICMP */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2_interfaces.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2_interfaces.c new file mode 100644 index 0000000..979b507 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2_interfaces.c @@ -0,0 +1,375 @@ +/** + * @file + * Management Information Base II (RFC1213) INTERFACES objects and functions. + */ + +/* + * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Dirk Ziegelmeier <dziegel@gmx.de> + * Christiaan Simons <christiaan.simons@axon.tv> + */ + +#include "lwip/snmp.h" +#include "lwip/apps/snmp.h" +#include "lwip/apps/snmp_core.h" +#include "lwip/apps/snmp_mib2.h" +#include "lwip/apps/snmp_table.h" +#include "lwip/apps/snmp_scalar.h" +#include "lwip/netif.h" +#include "lwip/stats.h" + +#include <string.h> + +#if LWIP_SNMP && SNMP_LWIP_MIB2 + +#if SNMP_USE_NETCONN +#define SYNC_NODE_NAME(node_name) node_name ## _synced +#define CREATE_LWIP_SYNC_NODE(oid, node_name) \ + static const struct snmp_threadsync_node node_name ## _synced = SNMP_CREATE_THREAD_SYNC_NODE(oid, &node_name.node, &snmp_mib2_lwip_locks); +#else +#define SYNC_NODE_NAME(node_name) node_name +#define CREATE_LWIP_SYNC_NODE(oid, node_name) +#endif + + +/* --- interfaces .1.3.6.1.2.1.2 ----------------------------------------------------- */ + +static s16_t +interfaces_get_value(struct snmp_node_instance* instance, void* value) +{ + if (instance->node->oid == 1) { + s32_t *sint_ptr = (s32_t*)value; + s32_t num_netifs = 0; + + struct netif *netif = netif_list; + while (netif != NULL) { + num_netifs++; + netif = netif->next; + } + + *sint_ptr = num_netifs; + return sizeof(*sint_ptr); + } + + return 0; +} + +/* list of allowed value ranges for incoming OID */ +static const struct snmp_oid_range interfaces_Table_oid_ranges[] = { + { 1, 0xff } /* netif->num is u8_t */ +}; + +static const u8_t iftable_ifOutQLen = 0; + +static const u8_t iftable_ifOperStatus_up = 1; +static const u8_t iftable_ifOperStatus_down = 2; + +static const u8_t iftable_ifAdminStatus_up = 1; +static const u8_t iftable_ifAdminStatus_lowerLayerDown = 7; +static const u8_t iftable_ifAdminStatus_down = 2; + +static snmp_err_t +interfaces_Table_get_cell_instance(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, struct snmp_node_instance* cell_instance) +{ + u32_t ifIndex; + struct netif *netif; + + LWIP_UNUSED_ARG(column); + + /* check if incoming OID length and if values are in plausible range */ + if (!snmp_oid_in_range(row_oid, row_oid_len, interfaces_Table_oid_ranges, LWIP_ARRAYSIZE(interfaces_Table_oid_ranges))) { + return SNMP_ERR_NOSUCHINSTANCE; + } + + /* get netif index from incoming OID */ + ifIndex = row_oid[0]; + + /* find netif with index */ + netif = netif_list; + while (netif != NULL) { + if (netif_to_num(netif) == ifIndex) { + /* store netif pointer for subsequent operations (get/test/set) */ + cell_instance->reference.ptr = netif; + return SNMP_ERR_NOERROR; + } + netif = netif->next; + } + + /* not found */ + return SNMP_ERR_NOSUCHINSTANCE; +} + +static snmp_err_t +interfaces_Table_get_next_cell_instance(const u32_t* column, struct snmp_obj_id* row_oid, struct snmp_node_instance* cell_instance) +{ + struct netif *netif; + struct snmp_next_oid_state state; + u32_t result_temp[LWIP_ARRAYSIZE(interfaces_Table_oid_ranges)]; + + LWIP_UNUSED_ARG(column); + + /* init struct to search next oid */ + snmp_next_oid_init(&state, row_oid->id, row_oid->len, result_temp, LWIP_ARRAYSIZE(interfaces_Table_oid_ranges)); + + /* iterate over all possible OIDs to find the next one */ + netif = netif_list; + while (netif != NULL) { + u32_t test_oid[LWIP_ARRAYSIZE(interfaces_Table_oid_ranges)]; + test_oid[0] = netif_to_num(netif); + + /* check generated OID: is it a candidate for the next one? */ + snmp_next_oid_check(&state, test_oid, LWIP_ARRAYSIZE(interfaces_Table_oid_ranges), netif); + + netif = netif->next; + } + + /* did we find a next one? */ + if (state.status == SNMP_NEXT_OID_STATUS_SUCCESS) { + snmp_oid_assign(row_oid, state.next_oid, state.next_oid_len); + /* store netif pointer for subsequent operations (get/test/set) */ + cell_instance->reference.ptr = /* (struct netif*) */state.reference; + return SNMP_ERR_NOERROR; + } + + /* not found */ + return SNMP_ERR_NOSUCHINSTANCE; +} + +static s16_t +interfaces_Table_get_value(struct snmp_node_instance* instance, void* value) +{ + struct netif *netif = (struct netif*)instance->reference.ptr; + u32_t* value_u32 = (u32_t*)value; + s32_t* value_s32 = (s32_t*)value; + u16_t value_len; + + switch (SNMP_TABLE_GET_COLUMN_FROM_OID(instance->instance_oid.id)) + { + case 1: /* ifIndex */ + *value_s32 = netif_to_num(netif); + value_len = sizeof(*value_s32); + break; + case 2: /* ifDescr */ + value_len = sizeof(netif->name); + MEMCPY(value, netif->name, value_len); + break; + case 3: /* ifType */ + *value_s32 = netif->link_type; + value_len = sizeof(*value_s32); + break; + case 4: /* ifMtu */ + *value_s32 = netif->mtu; + value_len = sizeof(*value_s32); + break; + case 5: /* ifSpeed */ + *value_u32 = netif->link_speed; + value_len = sizeof(*value_u32); + break; + case 6: /* ifPhysAddress */ + value_len = sizeof(netif->hwaddr); + MEMCPY(value, &netif->hwaddr, value_len); + break; + case 7: /* ifAdminStatus */ + if (netif_is_up(netif)) { + *value_s32 = iftable_ifOperStatus_up; + } else { + *value_s32 = iftable_ifOperStatus_down; + } + value_len = sizeof(*value_s32); + break; + case 8: /* ifOperStatus */ + if (netif_is_up(netif)) { + if (netif_is_link_up(netif)) { + *value_s32 = iftable_ifAdminStatus_up; + } else { + *value_s32 = iftable_ifAdminStatus_lowerLayerDown; + } + } else { + *value_s32 = iftable_ifAdminStatus_down; + } + value_len = sizeof(*value_s32); + break; + case 9: /* ifLastChange */ + *value_u32 = netif->ts; + value_len = sizeof(*value_u32); + break; + case 10: /* ifInOctets */ + *value_u32 = netif->mib2_counters.ifinoctets; + value_len = sizeof(*value_u32); + break; + case 11: /* ifInUcastPkts */ + *value_u32 = netif->mib2_counters.ifinucastpkts; + value_len = sizeof(*value_u32); + break; + case 12: /* ifInNUcastPkts */ + *value_u32 = netif->mib2_counters.ifinnucastpkts; + value_len = sizeof(*value_u32); + break; + case 13: /* ifInDiscards */ + *value_u32 = netif->mib2_counters.ifindiscards; + value_len = sizeof(*value_u32); + break; + case 14: /* ifInErrors */ + *value_u32 = netif->mib2_counters.ifinerrors; + value_len = sizeof(*value_u32); + break; + case 15: /* ifInUnkownProtos */ + *value_u32 = netif->mib2_counters.ifinunknownprotos; + value_len = sizeof(*value_u32); + break; + case 16: /* ifOutOctets */ + *value_u32 = netif->mib2_counters.ifoutoctets; + value_len = sizeof(*value_u32); + break; + case 17: /* ifOutUcastPkts */ + *value_u32 = netif->mib2_counters.ifoutucastpkts; + value_len = sizeof(*value_u32); + break; + case 18: /* ifOutNUcastPkts */ + *value_u32 = netif->mib2_counters.ifoutnucastpkts; + value_len = sizeof(*value_u32); + break; + case 19: /* ifOutDiscarts */ + *value_u32 = netif->mib2_counters.ifoutdiscards; + value_len = sizeof(*value_u32); + break; + case 20: /* ifOutErrors */ + *value_u32 = netif->mib2_counters.ifouterrors; + value_len = sizeof(*value_u32); + break; + case 21: /* ifOutQLen */ + *value_u32 = iftable_ifOutQLen; + value_len = sizeof(*value_u32); + break; + /** @note returning zeroDotZero (0.0) no media specific MIB support */ + case 22: /* ifSpecific */ + value_len = snmp_zero_dot_zero.len * sizeof(u32_t); + MEMCPY(value, snmp_zero_dot_zero.id, value_len); + break; + default: + return 0; + } + + return value_len; +} + +#if !SNMP_SAFE_REQUESTS + +static snmp_err_t +interfaces_Table_set_test(struct snmp_node_instance* instance, u16_t len, void *value) +{ + s32_t *sint_ptr = (s32_t*)value; + + /* stack should never call this method for another column, + because all other columns are set to readonly */ + LWIP_ASSERT("Invalid column", (SNMP_TABLE_GET_COLUMN_FROM_OID(instance->instance_oid.id) == 7)); + LWIP_UNUSED_ARG(len); + + if (*sint_ptr == 1 || *sint_ptr == 2) { + return SNMP_ERR_NOERROR; + } + + return SNMP_ERR_WRONGVALUE; +} + +static snmp_err_t +interfaces_Table_set_value(struct snmp_node_instance* instance, u16_t len, void *value) +{ + struct netif *netif = (struct netif*)instance->reference.ptr; + s32_t *sint_ptr = (s32_t*)value; + + /* stack should never call this method for another column, + because all other columns are set to readonly */ + LWIP_ASSERT("Invalid column", (SNMP_TABLE_GET_COLUMN_FROM_OID(instance->instance_oid.id) == 7)); + LWIP_UNUSED_ARG(len); + + if (*sint_ptr == 1) { + netif_set_up(netif); + } else if (*sint_ptr == 2) { + netif_set_down(netif); + } + + return SNMP_ERR_NOERROR; +} + +#endif /* SNMP_SAFE_REQUESTS */ + +static const struct snmp_scalar_node interfaces_Number = SNMP_SCALAR_CREATE_NODE_READONLY(1, SNMP_ASN1_TYPE_INTEGER, interfaces_get_value); + +static const struct snmp_table_col_def interfaces_Table_columns[] = { + { 1, SNMP_ASN1_TYPE_INTEGER, SNMP_NODE_INSTANCE_READ_ONLY }, /* ifIndex */ + { 2, SNMP_ASN1_TYPE_OCTET_STRING, SNMP_NODE_INSTANCE_READ_ONLY }, /* ifDescr */ + { 3, SNMP_ASN1_TYPE_INTEGER, SNMP_NODE_INSTANCE_READ_ONLY }, /* ifType */ + { 4, SNMP_ASN1_TYPE_INTEGER, SNMP_NODE_INSTANCE_READ_ONLY }, /* ifMtu */ + { 5, SNMP_ASN1_TYPE_GAUGE, SNMP_NODE_INSTANCE_READ_ONLY }, /* ifSpeed */ + { 6, SNMP_ASN1_TYPE_OCTET_STRING, SNMP_NODE_INSTANCE_READ_ONLY }, /* ifPhysAddress */ +#if !SNMP_SAFE_REQUESTS + { 7, SNMP_ASN1_TYPE_INTEGER, SNMP_NODE_INSTANCE_READ_WRITE }, /* ifAdminStatus */ +#else + { 7, SNMP_ASN1_TYPE_INTEGER, SNMP_NODE_INSTANCE_READ_ONLY }, /* ifAdminStatus */ +#endif + { 8, SNMP_ASN1_TYPE_INTEGER, SNMP_NODE_INSTANCE_READ_ONLY }, /* ifOperStatus */ + { 9, SNMP_ASN1_TYPE_TIMETICKS, SNMP_NODE_INSTANCE_READ_ONLY }, /* ifLastChange */ + { 10, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY }, /* ifInOctets */ + { 11, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY }, /* ifInUcastPkts */ + { 12, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY }, /* ifInNUcastPkts */ + { 13, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY }, /* ifInDiscarts */ + { 14, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY }, /* ifInErrors */ + { 15, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY }, /* ifInUnkownProtos */ + { 16, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY }, /* ifOutOctets */ + { 17, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY }, /* ifOutUcastPkts */ + { 18, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY }, /* ifOutNUcastPkts */ + { 19, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY }, /* ifOutDiscarts */ + { 20, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY }, /* ifOutErrors */ + { 21, SNMP_ASN1_TYPE_GAUGE, SNMP_NODE_INSTANCE_READ_ONLY }, /* ifOutQLen */ + { 22, SNMP_ASN1_TYPE_OBJECT_ID, SNMP_NODE_INSTANCE_READ_ONLY } /* ifSpecific */ +}; + +#if !SNMP_SAFE_REQUESTS +static const struct snmp_table_node interfaces_Table = SNMP_TABLE_CREATE( + 2, interfaces_Table_columns, + interfaces_Table_get_cell_instance, interfaces_Table_get_next_cell_instance, + interfaces_Table_get_value, interfaces_Table_set_test, interfaces_Table_set_value); +#else +static const struct snmp_table_node interfaces_Table = SNMP_TABLE_CREATE( + 2, interfaces_Table_columns, + interfaces_Table_get_cell_instance, interfaces_Table_get_next_cell_instance, + interfaces_Table_get_value, NULL, NULL); +#endif + +/* the following nodes access variables in LWIP stack from SNMP worker thread and must therefore be synced to LWIP (TCPIP) thread */ +CREATE_LWIP_SYNC_NODE(1, interfaces_Number) +CREATE_LWIP_SYNC_NODE(2, interfaces_Table) + +static const struct snmp_node* const interface_nodes[] = { + &SYNC_NODE_NAME(interfaces_Number).node.node, + &SYNC_NODE_NAME(interfaces_Table).node.node +}; + +const struct snmp_tree_node snmp_mib2_interface_root = SNMP_CREATE_TREE_NODE(2, interface_nodes); + +#endif /* LWIP_SNMP && SNMP_LWIP_MIB2 */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2_ip.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2_ip.c new file mode 100644 index 0000000..4f05180 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2_ip.c @@ -0,0 +1,743 @@ +/** + * @file + * Management Information Base II (RFC1213) IP objects and functions. + */ + +/* + * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Dirk Ziegelmeier <dziegel@gmx.de> + * Christiaan Simons <christiaan.simons@axon.tv> + */ + +#include "lwip/snmp.h" +#include "lwip/apps/snmp.h" +#include "lwip/apps/snmp_core.h" +#include "lwip/apps/snmp_mib2.h" +#include "lwip/apps/snmp_table.h" +#include "lwip/apps/snmp_scalar.h" +#include "lwip/stats.h" +#include "lwip/netif.h" +#include "lwip/ip.h" +#include "lwip/etharp.h" + +#if LWIP_SNMP && SNMP_LWIP_MIB2 + +#if SNMP_USE_NETCONN +#define SYNC_NODE_NAME(node_name) node_name ## _synced +#define CREATE_LWIP_SYNC_NODE(oid, node_name) \ + static const struct snmp_threadsync_node node_name ## _synced = SNMP_CREATE_THREAD_SYNC_NODE(oid, &node_name.node, &snmp_mib2_lwip_locks); +#else +#define SYNC_NODE_NAME(node_name) node_name +#define CREATE_LWIP_SYNC_NODE(oid, node_name) +#endif + +#if LWIP_IPV4 +/* --- ip .1.3.6.1.2.1.4 ----------------------------------------------------- */ + +static s16_t +ip_get_value(struct snmp_node_instance* instance, void* value) +{ + s32_t* sint_ptr = (s32_t*)value; + u32_t* uint_ptr = (u32_t*)value; + + switch (instance->node->oid) { + case 1: /* ipForwarding */ +#if IP_FORWARD + /* forwarding */ + *sint_ptr = 1; +#else + /* not-forwarding */ + *sint_ptr = 2; +#endif + return sizeof(*sint_ptr); + case 2: /* ipDefaultTTL */ + *sint_ptr = IP_DEFAULT_TTL; + return sizeof(*sint_ptr); + case 3: /* ipInReceives */ + *uint_ptr = STATS_GET(mib2.ipinreceives); + return sizeof(*uint_ptr); + case 4: /* ipInHdrErrors */ + *uint_ptr = STATS_GET(mib2.ipinhdrerrors); + return sizeof(*uint_ptr); + case 5: /* ipInAddrErrors */ + *uint_ptr = STATS_GET(mib2.ipinaddrerrors); + return sizeof(*uint_ptr); + case 6: /* ipForwDatagrams */ + *uint_ptr = STATS_GET(mib2.ipforwdatagrams); + return sizeof(*uint_ptr); + case 7: /* ipInUnknownProtos */ + *uint_ptr = STATS_GET(mib2.ipinunknownprotos); + return sizeof(*uint_ptr); + case 8: /* ipInDiscards */ + *uint_ptr = STATS_GET(mib2.ipindiscards); + return sizeof(*uint_ptr); + case 9: /* ipInDelivers */ + *uint_ptr = STATS_GET(mib2.ipindelivers); + return sizeof(*uint_ptr); + case 10: /* ipOutRequests */ + *uint_ptr = STATS_GET(mib2.ipoutrequests); + return sizeof(*uint_ptr); + case 11: /* ipOutDiscards */ + *uint_ptr = STATS_GET(mib2.ipoutdiscards); + return sizeof(*uint_ptr); + case 12: /* ipOutNoRoutes */ + *uint_ptr = STATS_GET(mib2.ipoutnoroutes); + return sizeof(*uint_ptr); + case 13: /* ipReasmTimeout */ +#if IP_REASSEMBLY + *sint_ptr = IP_REASS_MAXAGE; +#else + *sint_ptr = 0; +#endif + return sizeof(*sint_ptr); + case 14: /* ipReasmReqds */ + *uint_ptr = STATS_GET(mib2.ipreasmreqds); + return sizeof(*uint_ptr); + case 15: /* ipReasmOKs */ + *uint_ptr = STATS_GET(mib2.ipreasmoks); + return sizeof(*uint_ptr); + case 16: /* ipReasmFails */ + *uint_ptr = STATS_GET(mib2.ipreasmfails); + return sizeof(*uint_ptr); + case 17: /* ipFragOKs */ + *uint_ptr = STATS_GET(mib2.ipfragoks); + return sizeof(*uint_ptr); + case 18: /* ipFragFails */ + *uint_ptr = STATS_GET(mib2.ipfragfails); + return sizeof(*uint_ptr); + case 19: /* ipFragCreates */ + *uint_ptr = STATS_GET(mib2.ipfragcreates); + return sizeof(*uint_ptr); + case 23: /* ipRoutingDiscards: not supported -> always 0 */ + *uint_ptr = 0; + return sizeof(*uint_ptr); + default: + LWIP_DEBUGF(SNMP_MIB_DEBUG,("ip_get_value(): unknown id: %"S32_F"\n", instance->node->oid)); + break; + } + + return 0; +} + +/** + * Test ip object value before setting. + * + * @param instance node instance + * @param len return value space (in bytes) + * @param value points to (varbind) space to copy value from. + * + * @note we allow set if the value matches the hardwired value, + * otherwise return badvalue. + */ +static snmp_err_t +ip_set_test(struct snmp_node_instance* instance, u16_t len, void *value) +{ + snmp_err_t ret = SNMP_ERR_WRONGVALUE; + s32_t *sint_ptr = (s32_t*)value; + + LWIP_UNUSED_ARG(len); + switch (instance->node->oid) { + case 1: /* ipForwarding */ +#if IP_FORWARD + /* forwarding */ + if (*sint_ptr == 1) +#else + /* not-forwarding */ + if (*sint_ptr == 2) +#endif + { + ret = SNMP_ERR_NOERROR; + } + break; + case 2: /* ipDefaultTTL */ + if (*sint_ptr == IP_DEFAULT_TTL) { + ret = SNMP_ERR_NOERROR; + } + break; + default: + LWIP_DEBUGF(SNMP_MIB_DEBUG,("ip_set_test(): unknown id: %"S32_F"\n", instance->node->oid)); + break; + } + + return ret; +} + +static snmp_err_t +ip_set_value(struct snmp_node_instance* instance, u16_t len, void *value) +{ + LWIP_UNUSED_ARG(instance); + LWIP_UNUSED_ARG(len); + LWIP_UNUSED_ARG(value); + /* nothing to do here because in set_test we only accept values being the same as our own stored value -> no need to store anything */ + return SNMP_ERR_NOERROR; +} + +/* --- ipAddrTable --- */ + +/* list of allowed value ranges for incoming OID */ +static const struct snmp_oid_range ip_AddrTable_oid_ranges[] = { + { 0, 0xff }, /* IP A */ + { 0, 0xff }, /* IP B */ + { 0, 0xff }, /* IP C */ + { 0, 0xff } /* IP D */ +}; + +static snmp_err_t +ip_AddrTable_get_cell_value_core(struct netif *netif, const u32_t* column, union snmp_variant_value* value, u32_t* value_len) +{ + LWIP_UNUSED_ARG(value_len); + + switch (*column) { + case 1: /* ipAdEntAddr */ + value->u32 = netif_ip4_addr(netif)->addr; + break; + case 2: /* ipAdEntIfIndex */ + value->u32 = netif_to_num(netif); + break; + case 3: /* ipAdEntNetMask */ + value->u32 = netif_ip4_netmask(netif)->addr; + break; + case 4: /* ipAdEntBcastAddr */ + /* lwIP oddity, there's no broadcast + address in the netif we can rely on */ + value->u32 = IPADDR_BROADCAST & 1; + break; + case 5: /* ipAdEntReasmMaxSize */ +#if IP_REASSEMBLY + /* @todo The theoretical maximum is IP_REASS_MAX_PBUFS * size of the pbufs, + * but only if receiving one fragmented packet at a time. + * The current solution is to calculate for 2 simultaneous packets... + */ + value->u32 = (IP_HLEN + ((IP_REASS_MAX_PBUFS/2) * + (PBUF_POOL_BUFSIZE - PBUF_LINK_ENCAPSULATION_HLEN - PBUF_LINK_HLEN - IP_HLEN))); +#else + /** @todo returning MTU would be a bad thing and + returning a wild guess like '576' isn't good either */ + value->u32 = 0; +#endif + break; + default: + return SNMP_ERR_NOSUCHINSTANCE; + } + + return SNMP_ERR_NOERROR; +} + +static snmp_err_t +ip_AddrTable_get_cell_value(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, union snmp_variant_value* value, u32_t* value_len) +{ + ip4_addr_t ip; + struct netif *netif; + + /* check if incoming OID length and if values are in plausible range */ + if (!snmp_oid_in_range(row_oid, row_oid_len, ip_AddrTable_oid_ranges, LWIP_ARRAYSIZE(ip_AddrTable_oid_ranges))) { + return SNMP_ERR_NOSUCHINSTANCE; + } + + /* get IP from incoming OID */ + snmp_oid_to_ip4(&row_oid[0], &ip); /* we know it succeeds because of oid_in_range check above */ + + /* find netif with requested ip */ + netif = netif_list; + while (netif != NULL) { + if (ip4_addr_cmp(&ip, netif_ip4_addr(netif))) { + /* fill in object properties */ + return ip_AddrTable_get_cell_value_core(netif, column, value, value_len); + } + + netif = netif->next; + } + + /* not found */ + return SNMP_ERR_NOSUCHINSTANCE; +} + +static snmp_err_t +ip_AddrTable_get_next_cell_instance_and_value(const u32_t* column, struct snmp_obj_id* row_oid, union snmp_variant_value* value, u32_t* value_len) +{ + struct netif *netif; + struct snmp_next_oid_state state; + u32_t result_temp[LWIP_ARRAYSIZE(ip_AddrTable_oid_ranges)]; + + /* init struct to search next oid */ + snmp_next_oid_init(&state, row_oid->id, row_oid->len, result_temp, LWIP_ARRAYSIZE(ip_AddrTable_oid_ranges)); + + /* iterate over all possible OIDs to find the next one */ + netif = netif_list; + while (netif != NULL) { + u32_t test_oid[LWIP_ARRAYSIZE(ip_AddrTable_oid_ranges)]; + snmp_ip4_to_oid(netif_ip4_addr(netif), &test_oid[0]); + + /* check generated OID: is it a candidate for the next one? */ + snmp_next_oid_check(&state, test_oid, LWIP_ARRAYSIZE(ip_AddrTable_oid_ranges), netif); + + netif = netif->next; + } + + /* did we find a next one? */ + if (state.status == SNMP_NEXT_OID_STATUS_SUCCESS) { + snmp_oid_assign(row_oid, state.next_oid, state.next_oid_len); + /* fill in object properties */ + return ip_AddrTable_get_cell_value_core((struct netif*)state.reference, column, value, value_len); + } + + /* not found */ + return SNMP_ERR_NOSUCHINSTANCE; +} + +/* --- ipRouteTable --- */ + +/* list of allowed value ranges for incoming OID */ +static const struct snmp_oid_range ip_RouteTable_oid_ranges[] = { + { 0, 0xff }, /* IP A */ + { 0, 0xff }, /* IP B */ + { 0, 0xff }, /* IP C */ + { 0, 0xff }, /* IP D */ +}; + +static snmp_err_t +ip_RouteTable_get_cell_value_core(struct netif *netif, u8_t default_route, const u32_t* column, union snmp_variant_value* value, u32_t* value_len) +{ + switch (*column) { + case 1: /* ipRouteDest */ + if (default_route) { + /* default rte has 0.0.0.0 dest */ + value->u32 = IP4_ADDR_ANY4->addr; + } else { + /* netifs have netaddress dest */ + ip4_addr_t tmp; + ip4_addr_get_network(&tmp, netif_ip4_addr(netif), netif_ip4_netmask(netif)); + value->u32 = tmp.addr; + } + break; + case 2: /* ipRouteIfIndex */ + value->u32 = netif_to_num(netif); + break; + case 3: /* ipRouteMetric1 */ + if (default_route) { + value->s32 = 1; /* default */ + } else { + value->s32 = 0; /* normal */ + } + break; + case 4: /* ipRouteMetric2 */ + case 5: /* ipRouteMetric3 */ + case 6: /* ipRouteMetric4 */ + value->s32 = -1; /* none */ + break; + case 7: /* ipRouteNextHop */ + if (default_route) { + /* default rte: gateway */ + value->u32 = netif_ip4_gw(netif)->addr; + } else { + /* other rtes: netif ip_addr */ + value->u32 = netif_ip4_addr(netif)->addr; + } + break; + case 8: /* ipRouteType */ + if (default_route) { + /* default rte is indirect */ + value->u32 = 4; /* indirect */ + } else { + /* other rtes are direct */ + value->u32 = 3; /* direct */ + } + break; + case 9: /* ipRouteProto */ + /* locally defined routes */ + value->u32 = 2; /* local */ + break; + case 10: /* ipRouteAge */ + /* @todo (sysuptime - timestamp last change) / 100 */ + value->u32 = 0; + break; + case 11: /* ipRouteMask */ + if (default_route) { + /* default rte use 0.0.0.0 mask */ + value->u32 = IP4_ADDR_ANY4->addr; + } else { + /* other rtes use netmask */ + value->u32 = netif_ip4_netmask(netif)->addr; + } + break; + case 12: /* ipRouteMetric5 */ + value->s32 = -1; /* none */ + break; + case 13: /* ipRouteInfo */ + value->const_ptr = snmp_zero_dot_zero.id; + *value_len = snmp_zero_dot_zero.len * sizeof(u32_t); + break; + default: + return SNMP_ERR_NOSUCHINSTANCE; + } + + return SNMP_ERR_NOERROR; +} + +static snmp_err_t +ip_RouteTable_get_cell_value(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, union snmp_variant_value* value, u32_t* value_len) +{ + ip4_addr_t test_ip; + struct netif *netif; + + /* check if incoming OID length and if values are in plausible range */ + if (!snmp_oid_in_range(row_oid, row_oid_len, ip_RouteTable_oid_ranges, LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges))) { + return SNMP_ERR_NOSUCHINSTANCE; + } + + /* get IP and port from incoming OID */ + snmp_oid_to_ip4(&row_oid[0], &test_ip); /* we know it succeeds because of oid_in_range check above */ + + /* default route is on default netif */ + if (ip4_addr_isany_val(test_ip) && (netif_default != NULL)) { + /* fill in object properties */ + return ip_RouteTable_get_cell_value_core(netif_default, 1, column, value, value_len); + } + + /* find netif with requested route */ + netif = netif_list; + while (netif != NULL) { + ip4_addr_t dst; + ip4_addr_get_network(&dst, netif_ip4_addr(netif), netif_ip4_netmask(netif)); + + if (ip4_addr_cmp(&dst, &test_ip)) { + /* fill in object properties */ + return ip_RouteTable_get_cell_value_core(netif, 0, column, value, value_len); + } + + netif = netif->next; + } + + /* not found */ + return SNMP_ERR_NOSUCHINSTANCE; +} + +static snmp_err_t +ip_RouteTable_get_next_cell_instance_and_value(const u32_t* column, struct snmp_obj_id* row_oid, union snmp_variant_value* value, u32_t* value_len) +{ + struct netif *netif; + struct snmp_next_oid_state state; + u32_t result_temp[LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges)]; + u32_t test_oid[LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges)]; + + /* init struct to search next oid */ + snmp_next_oid_init(&state, row_oid->id, row_oid->len, result_temp, LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges)); + + /* check default route */ + if (netif_default != NULL) { + snmp_ip4_to_oid(IP4_ADDR_ANY4, &test_oid[0]); + snmp_next_oid_check(&state, test_oid, LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges), netif_default); + } + + /* iterate over all possible OIDs to find the next one */ + netif = netif_list; + while (netif != NULL) { + ip4_addr_t dst; + ip4_addr_get_network(&dst, netif_ip4_addr(netif), netif_ip4_netmask(netif)); + + /* check generated OID: is it a candidate for the next one? */ + if (!ip4_addr_isany_val(dst)) { + snmp_ip4_to_oid(&dst, &test_oid[0]); + snmp_next_oid_check(&state, test_oid, LWIP_ARRAYSIZE(ip_RouteTable_oid_ranges), netif); + } + + netif = netif->next; + } + + /* did we find a next one? */ + if (state.status == SNMP_NEXT_OID_STATUS_SUCCESS) { + ip4_addr_t dst; + snmp_oid_to_ip4(&result_temp[0], &dst); + snmp_oid_assign(row_oid, state.next_oid, state.next_oid_len); + /* fill in object properties */ + return ip_RouteTable_get_cell_value_core((struct netif*)state.reference, ip4_addr_isany_val(dst), column, value, value_len); + } else { + /* not found */ + return SNMP_ERR_NOSUCHINSTANCE; + } +} + +#if LWIP_ARP && LWIP_IPV4 +/* --- ipNetToMediaTable --- */ + +/* list of allowed value ranges for incoming OID */ +static const struct snmp_oid_range ip_NetToMediaTable_oid_ranges[] = { + { 1, 0xff }, /* IfIndex */ + { 0, 0xff }, /* IP A */ + { 0, 0xff }, /* IP B */ + { 0, 0xff }, /* IP C */ + { 0, 0xff } /* IP D */ +}; + +static snmp_err_t +ip_NetToMediaTable_get_cell_value_core(u8_t arp_table_index, const u32_t* column, union snmp_variant_value* value, u32_t* value_len) +{ + ip4_addr_t *ip; + struct netif *netif; + struct eth_addr *ethaddr; + + etharp_get_entry(arp_table_index, &ip, &netif, ðaddr); + + /* value */ + switch (*column) { + case 1: /* atIfIndex / ipNetToMediaIfIndex */ + value->u32 = netif_to_num(netif); + break; + case 2: /* atPhysAddress / ipNetToMediaPhysAddress */ + value->ptr = ethaddr; + *value_len = sizeof(*ethaddr); + break; + case 3: /* atNetAddress / ipNetToMediaNetAddress */ + value->u32 = ip->addr; + break; + case 4: /* ipNetToMediaType */ + value->u32 = 3; /* dynamic*/ + break; + default: + return SNMP_ERR_NOSUCHINSTANCE; + } + + return SNMP_ERR_NOERROR; +} + +static snmp_err_t +ip_NetToMediaTable_get_cell_value(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, union snmp_variant_value* value, u32_t* value_len) +{ + ip4_addr_t ip_in; + u8_t netif_index; + u8_t i; + + /* check if incoming OID length and if values are in plausible range */ + if (!snmp_oid_in_range(row_oid, row_oid_len, ip_NetToMediaTable_oid_ranges, LWIP_ARRAYSIZE(ip_NetToMediaTable_oid_ranges))) { + return SNMP_ERR_NOSUCHINSTANCE; + } + + /* get IP from incoming OID */ + netif_index = (u8_t)row_oid[0]; + snmp_oid_to_ip4(&row_oid[1], &ip_in); /* we know it succeeds because of oid_in_range check above */ + + /* find requested entry */ + for (i=0; i<ARP_TABLE_SIZE; i++) { + ip4_addr_t *ip; + struct netif *netif; + struct eth_addr *ethaddr; + + if (etharp_get_entry(i, &ip, &netif, ðaddr)) { + if ((netif_index == netif_to_num(netif)) && ip4_addr_cmp(&ip_in, ip)) { + /* fill in object properties */ + return ip_NetToMediaTable_get_cell_value_core(i, column, value, value_len); + } + } + } + + /* not found */ + return SNMP_ERR_NOSUCHINSTANCE; +} + +static snmp_err_t +ip_NetToMediaTable_get_next_cell_instance_and_value(const u32_t* column, struct snmp_obj_id* row_oid, union snmp_variant_value* value, u32_t* value_len) +{ + u8_t i; + struct snmp_next_oid_state state; + u32_t result_temp[LWIP_ARRAYSIZE(ip_NetToMediaTable_oid_ranges)]; + + /* init struct to search next oid */ + snmp_next_oid_init(&state, row_oid->id, row_oid->len, result_temp, LWIP_ARRAYSIZE(ip_NetToMediaTable_oid_ranges)); + + /* iterate over all possible OIDs to find the next one */ + for (i=0; i<ARP_TABLE_SIZE; i++) { + ip4_addr_t *ip; + struct netif *netif; + struct eth_addr *ethaddr; + + if (etharp_get_entry(i, &ip, &netif, ðaddr)) { + u32_t test_oid[LWIP_ARRAYSIZE(ip_NetToMediaTable_oid_ranges)]; + + test_oid[0] = netif_to_num(netif); + snmp_ip4_to_oid(ip, &test_oid[1]); + + /* check generated OID: is it a candidate for the next one? */ + snmp_next_oid_check(&state, test_oid, LWIP_ARRAYSIZE(ip_NetToMediaTable_oid_ranges), LWIP_PTR_NUMERIC_CAST(void*, i)); + } + } + + /* did we find a next one? */ + if (state.status == SNMP_NEXT_OID_STATUS_SUCCESS) { + snmp_oid_assign(row_oid, state.next_oid, state.next_oid_len); + /* fill in object properties */ + return ip_NetToMediaTable_get_cell_value_core(LWIP_PTR_NUMERIC_CAST(u8_t, state.reference), column, value, value_len); + } + + /* not found */ + return SNMP_ERR_NOSUCHINSTANCE; +} + +#endif /* LWIP_ARP && LWIP_IPV4 */ + +static const struct snmp_scalar_node ip_Forwarding = SNMP_SCALAR_CREATE_NODE(1, SNMP_NODE_INSTANCE_READ_WRITE, SNMP_ASN1_TYPE_INTEGER, ip_get_value, ip_set_test, ip_set_value); +static const struct snmp_scalar_node ip_DefaultTTL = SNMP_SCALAR_CREATE_NODE(2, SNMP_NODE_INSTANCE_READ_WRITE, SNMP_ASN1_TYPE_INTEGER, ip_get_value, ip_set_test, ip_set_value); +static const struct snmp_scalar_node ip_InReceives = SNMP_SCALAR_CREATE_NODE_READONLY(3, SNMP_ASN1_TYPE_COUNTER, ip_get_value); +static const struct snmp_scalar_node ip_InHdrErrors = SNMP_SCALAR_CREATE_NODE_READONLY(4, SNMP_ASN1_TYPE_COUNTER, ip_get_value); +static const struct snmp_scalar_node ip_InAddrErrors = SNMP_SCALAR_CREATE_NODE_READONLY(5, SNMP_ASN1_TYPE_COUNTER, ip_get_value); +static const struct snmp_scalar_node ip_ForwDatagrams = SNMP_SCALAR_CREATE_NODE_READONLY(6, SNMP_ASN1_TYPE_COUNTER, ip_get_value); +static const struct snmp_scalar_node ip_InUnknownProtos = SNMP_SCALAR_CREATE_NODE_READONLY(7, SNMP_ASN1_TYPE_COUNTER, ip_get_value); +static const struct snmp_scalar_node ip_InDiscards = SNMP_SCALAR_CREATE_NODE_READONLY(8, SNMP_ASN1_TYPE_COUNTER, ip_get_value); +static const struct snmp_scalar_node ip_InDelivers = SNMP_SCALAR_CREATE_NODE_READONLY(9, SNMP_ASN1_TYPE_COUNTER, ip_get_value); +static const struct snmp_scalar_node ip_OutRequests = SNMP_SCALAR_CREATE_NODE_READONLY(10, SNMP_ASN1_TYPE_COUNTER, ip_get_value); +static const struct snmp_scalar_node ip_OutDiscards = SNMP_SCALAR_CREATE_NODE_READONLY(11, SNMP_ASN1_TYPE_COUNTER, ip_get_value); +static const struct snmp_scalar_node ip_OutNoRoutes = SNMP_SCALAR_CREATE_NODE_READONLY(12, SNMP_ASN1_TYPE_COUNTER, ip_get_value); +static const struct snmp_scalar_node ip_ReasmTimeout = SNMP_SCALAR_CREATE_NODE_READONLY(13, SNMP_ASN1_TYPE_INTEGER, ip_get_value); +static const struct snmp_scalar_node ip_ReasmReqds = SNMP_SCALAR_CREATE_NODE_READONLY(14, SNMP_ASN1_TYPE_COUNTER, ip_get_value); +static const struct snmp_scalar_node ip_ReasmOKs = SNMP_SCALAR_CREATE_NODE_READONLY(15, SNMP_ASN1_TYPE_COUNTER, ip_get_value); +static const struct snmp_scalar_node ip_ReasmFails = SNMP_SCALAR_CREATE_NODE_READONLY(16, SNMP_ASN1_TYPE_COUNTER, ip_get_value); +static const struct snmp_scalar_node ip_FragOKs = SNMP_SCALAR_CREATE_NODE_READONLY(17, SNMP_ASN1_TYPE_COUNTER, ip_get_value); +static const struct snmp_scalar_node ip_FragFails = SNMP_SCALAR_CREATE_NODE_READONLY(18, SNMP_ASN1_TYPE_COUNTER, ip_get_value); +static const struct snmp_scalar_node ip_FragCreates = SNMP_SCALAR_CREATE_NODE_READONLY(19, SNMP_ASN1_TYPE_COUNTER, ip_get_value); +static const struct snmp_scalar_node ip_RoutingDiscards = SNMP_SCALAR_CREATE_NODE_READONLY(23, SNMP_ASN1_TYPE_COUNTER, ip_get_value); + +static const struct snmp_table_simple_col_def ip_AddrTable_columns[] = { + { 1, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipAdEntAddr */ + { 2, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipAdEntIfIndex */ + { 3, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipAdEntNetMask */ + { 4, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipAdEntBcastAddr */ + { 5, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 } /* ipAdEntReasmMaxSize */ +}; + +static const struct snmp_table_simple_node ip_AddrTable = SNMP_TABLE_CREATE_SIMPLE(20, ip_AddrTable_columns, ip_AddrTable_get_cell_value, ip_AddrTable_get_next_cell_instance_and_value); + +static const struct snmp_table_simple_col_def ip_RouteTable_columns[] = { + { 1, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteDest */ + { 2, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteIfIndex */ + { 3, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_S32 }, /* ipRouteMetric1 */ + { 4, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_S32 }, /* ipRouteMetric2 */ + { 5, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_S32 }, /* ipRouteMetric3 */ + { 6, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_S32 }, /* ipRouteMetric4 */ + { 7, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteNextHop */ + { 8, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteType */ + { 9, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteProto */ + { 10, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteAge */ + { 11, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipRouteMask */ + { 12, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_S32 }, /* ipRouteMetric5 */ + { 13, SNMP_ASN1_TYPE_OBJECT_ID, SNMP_VARIANT_VALUE_TYPE_PTR } /* ipRouteInfo */ +}; + +static const struct snmp_table_simple_node ip_RouteTable = SNMP_TABLE_CREATE_SIMPLE(21, ip_RouteTable_columns, ip_RouteTable_get_cell_value, ip_RouteTable_get_next_cell_instance_and_value); +#endif /* LWIP_IPV4 */ + +#if LWIP_ARP && LWIP_IPV4 +static const struct snmp_table_simple_col_def ip_NetToMediaTable_columns[] = { + { 1, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipNetToMediaIfIndex */ + { 2, SNMP_ASN1_TYPE_OCTET_STRING, SNMP_VARIANT_VALUE_TYPE_PTR }, /* ipNetToMediaPhysAddress */ + { 3, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* ipNetToMediaNetAddress */ + { 4, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 } /* ipNetToMediaType */ +}; + +static const struct snmp_table_simple_node ip_NetToMediaTable = SNMP_TABLE_CREATE_SIMPLE(22, ip_NetToMediaTable_columns, ip_NetToMediaTable_get_cell_value, ip_NetToMediaTable_get_next_cell_instance_and_value); +#endif /* LWIP_ARP && LWIP_IPV4 */ + +#if LWIP_IPV4 +/* the following nodes access variables in LWIP stack from SNMP worker thread and must therefore be synced to LWIP (TCPIP) thread */ +CREATE_LWIP_SYNC_NODE( 1, ip_Forwarding) +CREATE_LWIP_SYNC_NODE( 2, ip_DefaultTTL) +CREATE_LWIP_SYNC_NODE( 3, ip_InReceives) +CREATE_LWIP_SYNC_NODE( 4, ip_InHdrErrors) +CREATE_LWIP_SYNC_NODE( 5, ip_InAddrErrors) +CREATE_LWIP_SYNC_NODE( 6, ip_ForwDatagrams) +CREATE_LWIP_SYNC_NODE( 7, ip_InUnknownProtos) +CREATE_LWIP_SYNC_NODE( 8, ip_InDiscards) +CREATE_LWIP_SYNC_NODE( 9, ip_InDelivers) +CREATE_LWIP_SYNC_NODE(10, ip_OutRequests) +CREATE_LWIP_SYNC_NODE(11, ip_OutDiscards) +CREATE_LWIP_SYNC_NODE(12, ip_OutNoRoutes) +CREATE_LWIP_SYNC_NODE(13, ip_ReasmTimeout) +CREATE_LWIP_SYNC_NODE(14, ip_ReasmReqds) +CREATE_LWIP_SYNC_NODE(15, ip_ReasmOKs) +CREATE_LWIP_SYNC_NODE(15, ip_ReasmFails) +CREATE_LWIP_SYNC_NODE(17, ip_FragOKs) +CREATE_LWIP_SYNC_NODE(18, ip_FragFails) +CREATE_LWIP_SYNC_NODE(19, ip_FragCreates) +CREATE_LWIP_SYNC_NODE(20, ip_AddrTable) +CREATE_LWIP_SYNC_NODE(21, ip_RouteTable) +#if LWIP_ARP +CREATE_LWIP_SYNC_NODE(22, ip_NetToMediaTable) +#endif /* LWIP_ARP */ +CREATE_LWIP_SYNC_NODE(23, ip_RoutingDiscards) + +static const struct snmp_node* const ip_nodes[] = { + &SYNC_NODE_NAME(ip_Forwarding).node.node, + &SYNC_NODE_NAME(ip_DefaultTTL).node.node, + &SYNC_NODE_NAME(ip_InReceives).node.node, + &SYNC_NODE_NAME(ip_InHdrErrors).node.node, + &SYNC_NODE_NAME(ip_InAddrErrors).node.node, + &SYNC_NODE_NAME(ip_ForwDatagrams).node.node, + &SYNC_NODE_NAME(ip_InUnknownProtos).node.node, + &SYNC_NODE_NAME(ip_InDiscards).node.node, + &SYNC_NODE_NAME(ip_InDelivers).node.node, + &SYNC_NODE_NAME(ip_OutRequests).node.node, + &SYNC_NODE_NAME(ip_OutDiscards).node.node, + &SYNC_NODE_NAME(ip_OutNoRoutes).node.node, + &SYNC_NODE_NAME(ip_ReasmTimeout).node.node, + &SYNC_NODE_NAME(ip_ReasmReqds).node.node, + &SYNC_NODE_NAME(ip_ReasmOKs).node.node, + &SYNC_NODE_NAME(ip_ReasmFails).node.node, + &SYNC_NODE_NAME(ip_FragOKs).node.node, + &SYNC_NODE_NAME(ip_FragFails).node.node, + &SYNC_NODE_NAME(ip_FragCreates).node.node, + &SYNC_NODE_NAME(ip_AddrTable).node.node, + &SYNC_NODE_NAME(ip_RouteTable).node.node, +#if LWIP_ARP + &SYNC_NODE_NAME(ip_NetToMediaTable).node.node, +#endif /* LWIP_ARP */ + &SYNC_NODE_NAME(ip_RoutingDiscards).node.node +}; + +const struct snmp_tree_node snmp_mib2_ip_root = SNMP_CREATE_TREE_NODE(4, ip_nodes); +#endif /* LWIP_IPV4 */ + +/* --- at .1.3.6.1.2.1.3 ----------------------------------------------------- */ + +#if LWIP_ARP && LWIP_IPV4 +/* at node table is a subset of ip_nettomedia table (same rows but less columns) */ +static const struct snmp_table_simple_col_def at_Table_columns[] = { + { 1, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* atIfIndex */ + { 2, SNMP_ASN1_TYPE_OCTET_STRING, SNMP_VARIANT_VALUE_TYPE_PTR }, /* atPhysAddress */ + { 3, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 } /* atNetAddress */ +}; + +static const struct snmp_table_simple_node at_Table = SNMP_TABLE_CREATE_SIMPLE(1, at_Table_columns, ip_NetToMediaTable_get_cell_value, ip_NetToMediaTable_get_next_cell_instance_and_value); + +/* the following nodes access variables in LWIP stack from SNMP worker thread and must therefore be synced to LWIP (TCPIP) thread */ +CREATE_LWIP_SYNC_NODE(1, at_Table) + +static const struct snmp_node* const at_nodes[] = { + &SYNC_NODE_NAME(at_Table).node.node +}; + +const struct snmp_tree_node snmp_mib2_at_root = SNMP_CREATE_TREE_NODE(3, at_nodes); +#endif /* LWIP_ARP && LWIP_IPV4 */ + +#endif /* LWIP_SNMP && SNMP_LWIP_MIB2 */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2_snmp.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2_snmp.c new file mode 100644 index 0000000..8a36d61 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2_snmp.c @@ -0,0 +1,227 @@ +/** + * @file + * Management Information Base II (RFC1213) SNMP objects and functions. + */ + +/* + * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Dirk Ziegelmeier <dziegel@gmx.de> + * Christiaan Simons <christiaan.simons@axon.tv> + */ + +#include "lwip/snmp.h" +#include "lwip/apps/snmp.h" +#include "lwip/apps/snmp_core.h" +#include "lwip/apps/snmp_mib2.h" +#include "lwip/apps/snmp_scalar.h" + +#if LWIP_SNMP && SNMP_LWIP_MIB2 + +#define MIB2_AUTH_TRAPS_ENABLED 1 +#define MIB2_AUTH_TRAPS_DISABLED 2 + +/* --- snmp .1.3.6.1.2.1.11 ----------------------------------------------------- */ +static s16_t +snmp_get_value(const struct snmp_scalar_array_node_def *node, void *value) +{ + u32_t *uint_ptr = (u32_t*)value; + switch (node->oid) { + case 1: /* snmpInPkts */ + *uint_ptr = snmp_stats.inpkts; + break; + case 2: /* snmpOutPkts */ + *uint_ptr = snmp_stats.outpkts; + break; + case 3: /* snmpInBadVersions */ + *uint_ptr = snmp_stats.inbadversions; + break; + case 4: /* snmpInBadCommunityNames */ + *uint_ptr = snmp_stats.inbadcommunitynames; + break; + case 5: /* snmpInBadCommunityUses */ + *uint_ptr = snmp_stats.inbadcommunityuses; + break; + case 6: /* snmpInASNParseErrs */ + *uint_ptr = snmp_stats.inasnparseerrs; + break; + case 8: /* snmpInTooBigs */ + *uint_ptr = snmp_stats.intoobigs; + break; + case 9: /* snmpInNoSuchNames */ + *uint_ptr = snmp_stats.innosuchnames; + break; + case 10: /* snmpInBadValues */ + *uint_ptr = snmp_stats.inbadvalues; + break; + case 11: /* snmpInReadOnlys */ + *uint_ptr = snmp_stats.inreadonlys; + break; + case 12: /* snmpInGenErrs */ + *uint_ptr = snmp_stats.ingenerrs; + break; + case 13: /* snmpInTotalReqVars */ + *uint_ptr = snmp_stats.intotalreqvars; + break; + case 14: /* snmpInTotalSetVars */ + *uint_ptr = snmp_stats.intotalsetvars; + break; + case 15: /* snmpInGetRequests */ + *uint_ptr = snmp_stats.ingetrequests; + break; + case 16: /* snmpInGetNexts */ + *uint_ptr = snmp_stats.ingetnexts; + break; + case 17: /* snmpInSetRequests */ + *uint_ptr = snmp_stats.insetrequests; + break; + case 18: /* snmpInGetResponses */ + *uint_ptr = snmp_stats.ingetresponses; + break; + case 19: /* snmpInTraps */ + *uint_ptr = snmp_stats.intraps; + break; + case 20: /* snmpOutTooBigs */ + *uint_ptr = snmp_stats.outtoobigs; + break; + case 21: /* snmpOutNoSuchNames */ + *uint_ptr = snmp_stats.outnosuchnames; + break; + case 22: /* snmpOutBadValues */ + *uint_ptr = snmp_stats.outbadvalues; + break; + case 24: /* snmpOutGenErrs */ + *uint_ptr = snmp_stats.outgenerrs; + break; + case 25: /* snmpOutGetRequests */ + *uint_ptr = snmp_stats.outgetrequests; + break; + case 26: /* snmpOutGetNexts */ + *uint_ptr = snmp_stats.outgetnexts; + break; + case 27: /* snmpOutSetRequests */ + *uint_ptr = snmp_stats.outsetrequests; + break; + case 28: /* snmpOutGetResponses */ + *uint_ptr = snmp_stats.outgetresponses; + break; + case 29: /* snmpOutTraps */ + *uint_ptr = snmp_stats.outtraps; + break; + case 30: /* snmpEnableAuthenTraps */ + if (snmp_get_auth_traps_enabled() == SNMP_AUTH_TRAPS_DISABLED) { + *uint_ptr = MIB2_AUTH_TRAPS_DISABLED; + } else { + *uint_ptr = MIB2_AUTH_TRAPS_ENABLED; + } + break; + case 31: /* snmpSilentDrops */ + *uint_ptr = 0; /* not supported */ + break; + case 32: /* snmpProxyDrops */ + *uint_ptr = 0; /* not supported */ + break; + default: + LWIP_DEBUGF(SNMP_MIB_DEBUG,("snmp_get_value(): unknown id: %"S32_F"\n", node->oid)); + return 0; + } + + return sizeof(*uint_ptr); +} + +static snmp_err_t +snmp_set_test(const struct snmp_scalar_array_node_def *node, u16_t len, void *value) +{ + snmp_err_t ret = SNMP_ERR_WRONGVALUE; + LWIP_UNUSED_ARG(len); + + if (node->oid == 30) { + /* snmpEnableAuthenTraps */ + s32_t *sint_ptr = (s32_t*)value; + + /* we should have writable non-volatile mem here */ + if ((*sint_ptr == MIB2_AUTH_TRAPS_DISABLED) || (*sint_ptr == MIB2_AUTH_TRAPS_ENABLED)) { + ret = SNMP_ERR_NOERROR; + } + } + return ret; +} + +static snmp_err_t +snmp_set_value(const struct snmp_scalar_array_node_def *node, u16_t len, void *value) +{ + LWIP_UNUSED_ARG(len); + + if (node->oid == 30) { + /* snmpEnableAuthenTraps */ + s32_t *sint_ptr = (s32_t*)value; + if (*sint_ptr == MIB2_AUTH_TRAPS_DISABLED) { + snmp_set_auth_traps_enabled(SNMP_AUTH_TRAPS_DISABLED); + } else { + snmp_set_auth_traps_enabled(SNMP_AUTH_TRAPS_ENABLED); + } + } + + return SNMP_ERR_NOERROR; +} + +/* the following nodes access variables in SNMP stack (snmp_stats) from SNMP worker thread -> OK, no sync needed */ +static const struct snmp_scalar_array_node_def snmp_nodes[] = { + { 1, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpInPkts */ + { 2, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpOutPkts */ + { 3, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpInBadVersions */ + { 4, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpInBadCommunityNames */ + { 5, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpInBadCommunityUses */ + { 6, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpInASNParseErrs */ + { 8, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpInTooBigs */ + { 9, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpInNoSuchNames */ + {10, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpInBadValues */ + {11, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpInReadOnlys */ + {12, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpInGenErrs */ + {13, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpInTotalReqVars */ + {14, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpInTotalSetVars */ + {15, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpInGetRequests */ + {16, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpInGetNexts */ + {17, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpInSetRequests */ + {18, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpInGetResponses */ + {19, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpInTraps */ + {20, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpOutTooBigs */ + {21, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpOutNoSuchNames */ + {22, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpOutBadValues */ + {24, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpOutGenErrs */ + {25, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpOutGetRequests */ + {26, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpOutGetNexts */ + {27, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpOutSetRequests */ + {28, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpOutGetResponses */ + {29, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpOutTraps */ + {30, SNMP_ASN1_TYPE_INTEGER, SNMP_NODE_INSTANCE_READ_WRITE}, /* snmpEnableAuthenTraps */ + {31, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY}, /* snmpSilentDrops */ + {32, SNMP_ASN1_TYPE_COUNTER, SNMP_NODE_INSTANCE_READ_ONLY} /* snmpProxyDrops */ +}; + +const struct snmp_scalar_array_node snmp_mib2_snmp_root = SNMP_SCALAR_CREATE_ARRAY_NODE(11, snmp_nodes, snmp_get_value, snmp_set_test, snmp_set_value); + +#endif /* LWIP_SNMP && SNMP_LWIP_MIB2 */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2_system.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2_system.c new file mode 100644 index 0000000..90e5780 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2_system.c @@ -0,0 +1,377 @@ +/** + * @file + * Management Information Base II (RFC1213) SYSTEM objects and functions. + */ + +/* + * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Dirk Ziegelmeier <dziegel@gmx.de> + * Christiaan Simons <christiaan.simons@axon.tv> + */ + +#include "lwip/snmp.h" +#include "lwip/apps/snmp.h" +#include "lwip/apps/snmp_core.h" +#include "lwip/apps/snmp_mib2.h" +#include "lwip/apps/snmp_table.h" +#include "lwip/apps/snmp_scalar.h" +#include "lwip/sys.h" + +#include <string.h> + +#if LWIP_SNMP && SNMP_LWIP_MIB2 + +#if SNMP_USE_NETCONN +#define SYNC_NODE_NAME(node_name) node_name ## _synced +#define CREATE_LWIP_SYNC_NODE(oid, node_name) \ + static const struct snmp_threadsync_node node_name ## _synced = SNMP_CREATE_THREAD_SYNC_NODE(oid, &node_name.node, &snmp_mib2_lwip_locks); +#else +#define SYNC_NODE_NAME(node_name) node_name +#define CREATE_LWIP_SYNC_NODE(oid, node_name) +#endif + +/* --- system .1.3.6.1.2.1.1 ----------------------------------------------------- */ + +/** mib-2.system.sysDescr */ +static const u8_t sysdescr_default[] = SNMP_LWIP_MIB2_SYSDESC; +static const u8_t* sysdescr = sysdescr_default; +static const u16_t* sysdescr_len = NULL; /* use strlen for determining len */ + +/** mib-2.system.sysContact */ +static const u8_t syscontact_default[] = SNMP_LWIP_MIB2_SYSCONTACT; +static const u8_t* syscontact = syscontact_default; +static const u16_t* syscontact_len = NULL; /* use strlen for determining len */ +static u8_t* syscontact_wr = NULL; /* if writable, points to the same buffer as syscontact (required for correct constness) */ +static u16_t* syscontact_wr_len = NULL; /* if writable, points to the same buffer as syscontact_len (required for correct constness) */ +static u16_t syscontact_bufsize = 0; /* 0=not writable */ + +/** mib-2.system.sysName */ +static const u8_t sysname_default[] = SNMP_LWIP_MIB2_SYSNAME; +static const u8_t* sysname = sysname_default; +static const u16_t* sysname_len = NULL; /* use strlen for determining len */ +static u8_t* sysname_wr = NULL; /* if writable, points to the same buffer as sysname (required for correct constness) */ +static u16_t* sysname_wr_len = NULL; /* if writable, points to the same buffer as sysname_len (required for correct constness) */ +static u16_t sysname_bufsize = 0; /* 0=not writable */ + +/** mib-2.system.sysLocation */ +static const u8_t syslocation_default[] = SNMP_LWIP_MIB2_SYSLOCATION; +static const u8_t* syslocation = syslocation_default; +static const u16_t* syslocation_len = NULL; /* use strlen for determining len */ +static u8_t* syslocation_wr = NULL; /* if writable, points to the same buffer as syslocation (required for correct constness) */ +static u16_t* syslocation_wr_len = NULL; /* if writable, points to the same buffer as syslocation_len (required for correct constness) */ +static u16_t syslocation_bufsize = 0; /* 0=not writable */ + +/** + * @ingroup snmp_mib2 + * Initializes sysDescr pointers. + * + * @param str if non-NULL then copy str pointer + * @param len points to string length, excluding zero terminator + */ +void +snmp_mib2_set_sysdescr(const u8_t *str, const u16_t *len) +{ + if (str != NULL) { + sysdescr = str; + sysdescr_len = len; + } +} + +/** + * @ingroup snmp_mib2 + * Initializes sysContact pointers + * + * @param ocstr if non-NULL then copy str pointer + * @param ocstrlen points to string length, excluding zero terminator. + * if set to NULL it is assumed that ocstr is NULL-terminated. + * @param bufsize size of the buffer in bytes. + * (this is required because the buffer can be overwritten by snmp-set) + * if ocstrlen is NULL buffer needs space for terminating 0 byte. + * otherwise complete buffer is used for string. + * if bufsize is set to 0, the value is regarded as read-only. + */ +void +snmp_mib2_set_syscontact(u8_t *ocstr, u16_t *ocstrlen, u16_t bufsize) +{ + if (ocstr != NULL) { + syscontact = ocstr; + syscontact_wr = ocstr; + syscontact_len = ocstrlen; + syscontact_wr_len = ocstrlen; + syscontact_bufsize = bufsize; + } +} + +/** + * @ingroup snmp_mib2 + * see \ref snmp_mib2_set_syscontact but set pointer to readonly memory + */ +void +snmp_mib2_set_syscontact_readonly(const u8_t *ocstr, const u16_t *ocstrlen) +{ + if (ocstr != NULL) { + syscontact = ocstr; + syscontact_len = ocstrlen; + syscontact_wr = NULL; + syscontact_wr_len = NULL; + syscontact_bufsize = 0; + } +} + + +/** + * @ingroup snmp_mib2 + * Initializes sysName pointers + * + * @param ocstr if non-NULL then copy str pointer + * @param ocstrlen points to string length, excluding zero terminator. + * if set to NULL it is assumed that ocstr is NULL-terminated. + * @param bufsize size of the buffer in bytes. + * (this is required because the buffer can be overwritten by snmp-set) + * if ocstrlen is NULL buffer needs space for terminating 0 byte. + * otherwise complete buffer is used for string. + * if bufsize is set to 0, the value is regarded as read-only. + */ +void +snmp_mib2_set_sysname(u8_t *ocstr, u16_t *ocstrlen, u16_t bufsize) +{ + if (ocstr != NULL) { + sysname = ocstr; + sysname_wr = ocstr; + sysname_len = ocstrlen; + sysname_wr_len = ocstrlen; + sysname_bufsize = bufsize; + } +} + +/** + * @ingroup snmp_mib2 + * see \ref snmp_mib2_set_sysname but set pointer to readonly memory + */ +void +snmp_mib2_set_sysname_readonly(const u8_t *ocstr, const u16_t *ocstrlen) +{ + if (ocstr != NULL) { + sysname = ocstr; + sysname_len = ocstrlen; + sysname_wr = NULL; + sysname_wr_len = NULL; + sysname_bufsize = 0; + } +} + +/** + * @ingroup snmp_mib2 + * Initializes sysLocation pointers + * + * @param ocstr if non-NULL then copy str pointer + * @param ocstrlen points to string length, excluding zero terminator. + * if set to NULL it is assumed that ocstr is NULL-terminated. + * @param bufsize size of the buffer in bytes. + * (this is required because the buffer can be overwritten by snmp-set) + * if ocstrlen is NULL buffer needs space for terminating 0 byte. + * otherwise complete buffer is used for string. + * if bufsize is set to 0, the value is regarded as read-only. + */ +void +snmp_mib2_set_syslocation(u8_t *ocstr, u16_t *ocstrlen, u16_t bufsize) +{ + if (ocstr != NULL) { + syslocation = ocstr; + syslocation_wr = ocstr; + syslocation_len = ocstrlen; + syslocation_wr_len = ocstrlen; + syslocation_bufsize = bufsize; + } +} + +/** + * @ingroup snmp_mib2 + * see \ref snmp_mib2_set_syslocation but set pointer to readonly memory + */ +void +snmp_mib2_set_syslocation_readonly(const u8_t *ocstr, const u16_t *ocstrlen) +{ + if (ocstr != NULL) { + syslocation = ocstr; + syslocation_len = ocstrlen; + syslocation_wr = NULL; + syslocation_wr_len = NULL; + syslocation_bufsize = 0; + } +} + + +static s16_t +system_get_value(const struct snmp_scalar_array_node_def *node, void *value) +{ + const u8_t* var = NULL; + const s16_t* var_len; + u16_t result; + + switch (node->oid) { + case 1: /* sysDescr */ + var = sysdescr; + var_len = (const s16_t*)sysdescr_len; + break; + case 2: /* sysObjectID */ + { + const struct snmp_obj_id* dev_enterprise_oid = snmp_get_device_enterprise_oid(); + MEMCPY(value, dev_enterprise_oid->id, dev_enterprise_oid->len * sizeof(u32_t)); + return dev_enterprise_oid->len * sizeof(u32_t); + } + case 3: /* sysUpTime */ + MIB2_COPY_SYSUPTIME_TO((u32_t*)value); + return sizeof(u32_t); + case 4: /* sysContact */ + var = syscontact; + var_len = (const s16_t*)syscontact_len; + break; + case 5: /* sysName */ + var = sysname; + var_len = (const s16_t*)sysname_len; + break; + case 6: /* sysLocation */ + var = syslocation; + var_len = (const s16_t*)syslocation_len; + break; + case 7: /* sysServices */ + *(s32_t*)value = SNMP_SYSSERVICES; + return sizeof(s32_t); + default: + LWIP_DEBUGF(SNMP_MIB_DEBUG,("system_get_value(): unknown id: %"S32_F"\n", node->oid)); + return 0; + } + + /* handle string values (OID 1,4,5 and 6) */ + LWIP_ASSERT("", (value != NULL)); + if (var_len == NULL) { + result = (s16_t)strlen((const char*)var); + } else { + result = *var_len; + } + MEMCPY(value, var, result); + return result; +} + +static snmp_err_t +system_set_test(const struct snmp_scalar_array_node_def *node, u16_t len, void *value) +{ + snmp_err_t ret = SNMP_ERR_WRONGVALUE; + const u16_t* var_bufsize = NULL; + const u16_t* var_wr_len; + + LWIP_UNUSED_ARG(value); + + switch (node->oid) { + case 4: /* sysContact */ + var_bufsize = &syscontact_bufsize; + var_wr_len = syscontact_wr_len; + break; + case 5: /* sysName */ + var_bufsize = &sysname_bufsize; + var_wr_len = sysname_wr_len; + break; + case 6: /* sysLocation */ + var_bufsize = &syslocation_bufsize; + var_wr_len = syslocation_wr_len; + break; + default: + LWIP_DEBUGF(SNMP_MIB_DEBUG,("system_set_test(): unknown id: %"S32_F"\n", node->oid)); + return ret; + } + + /* check if value is writable at all */ + if (*var_bufsize > 0) { + if (var_wr_len == NULL) { + /* we have to take the terminating 0 into account */ + if (len < *var_bufsize) { + ret = SNMP_ERR_NOERROR; + } + } else { + if (len <= *var_bufsize) { + ret = SNMP_ERR_NOERROR; + } + } + } else { + ret = SNMP_ERR_NOTWRITABLE; + } + + return ret; +} + +static snmp_err_t +system_set_value(const struct snmp_scalar_array_node_def *node, u16_t len, void *value) +{ + u8_t* var_wr = NULL; + u16_t* var_wr_len; + + switch (node->oid) { + case 4: /* sysContact */ + var_wr = syscontact_wr; + var_wr_len = syscontact_wr_len; + break; + case 5: /* sysName */ + var_wr = sysname_wr; + var_wr_len = sysname_wr_len; + break; + case 6: /* sysLocation */ + var_wr = syslocation_wr; + var_wr_len = syslocation_wr_len; + break; + default: + LWIP_DEBUGF(SNMP_MIB_DEBUG,("system_set_value(): unknown id: %"S32_F"\n", node->oid)); + return SNMP_ERR_GENERROR; + } + + /* no need to check size of target buffer, this was already done in set_test method */ + LWIP_ASSERT("", var_wr != NULL); + MEMCPY(var_wr, value, len); + + if (var_wr_len == NULL) { + /* add terminating 0 */ + var_wr[len] = 0; + } else { + *var_wr_len = len; + } + + return SNMP_ERR_NOERROR; +} + +static const struct snmp_scalar_array_node_def system_nodes[] = { + {1, SNMP_ASN1_TYPE_OCTET_STRING, SNMP_NODE_INSTANCE_READ_ONLY}, /* sysDescr */ + {2, SNMP_ASN1_TYPE_OBJECT_ID, SNMP_NODE_INSTANCE_READ_ONLY}, /* sysObjectID */ + {3, SNMP_ASN1_TYPE_TIMETICKS, SNMP_NODE_INSTANCE_READ_ONLY}, /* sysUpTime */ + {4, SNMP_ASN1_TYPE_OCTET_STRING, SNMP_NODE_INSTANCE_READ_WRITE}, /* sysContact */ + {5, SNMP_ASN1_TYPE_OCTET_STRING, SNMP_NODE_INSTANCE_READ_WRITE}, /* sysName */ + {6, SNMP_ASN1_TYPE_OCTET_STRING, SNMP_NODE_INSTANCE_READ_WRITE}, /* sysLocation */ + {7, SNMP_ASN1_TYPE_INTEGER, SNMP_NODE_INSTANCE_READ_ONLY} /* sysServices */ +}; + +const struct snmp_scalar_array_node snmp_mib2_system_node = SNMP_SCALAR_CREATE_ARRAY_NODE(1, system_nodes, system_get_value, system_set_test, system_set_value); + +#endif /* LWIP_SNMP && SNMP_LWIP_MIB2 */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2_tcp.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2_tcp.c new file mode 100644 index 0000000..21f6965 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2_tcp.c @@ -0,0 +1,594 @@ +/** + * @file + * Management Information Base II (RFC1213) TCP objects and functions. + */ + +/* + * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Dirk Ziegelmeier <dziegel@gmx.de> + * Christiaan Simons <christiaan.simons@axon.tv> + */ + +#include "lwip/snmp.h" +#include "lwip/apps/snmp.h" +#include "lwip/apps/snmp_core.h" +#include "lwip/apps/snmp_mib2.h" +#include "lwip/apps/snmp_table.h" +#include "lwip/apps/snmp_scalar.h" +#include "lwip/tcp.h" +#include "lwip/priv/tcp_priv.h" +#include "lwip/stats.h" + +#include <string.h> + +#if LWIP_SNMP && SNMP_LWIP_MIB2 && LWIP_TCP + +#if SNMP_USE_NETCONN +#define SYNC_NODE_NAME(node_name) node_name ## _synced +#define CREATE_LWIP_SYNC_NODE(oid, node_name) \ + static const struct snmp_threadsync_node node_name ## _synced = SNMP_CREATE_THREAD_SYNC_NODE(oid, &node_name.node, &snmp_mib2_lwip_locks); +#else +#define SYNC_NODE_NAME(node_name) node_name +#define CREATE_LWIP_SYNC_NODE(oid, node_name) +#endif + +/* --- tcp .1.3.6.1.2.1.6 ----------------------------------------------------- */ + +static s16_t +tcp_get_value(struct snmp_node_instance* instance, void* value) +{ + u32_t *uint_ptr = (u32_t*)value; + s32_t *sint_ptr = (s32_t*)value; + + switch (instance->node->oid) { + case 1: /* tcpRtoAlgorithm, vanj(4) */ + *sint_ptr = 4; + return sizeof(*sint_ptr); + case 2: /* tcpRtoMin */ + /* @todo not the actual value, a guess, + needs to be calculated */ + *sint_ptr = 1000; + return sizeof(*sint_ptr); + case 3: /* tcpRtoMax */ + /* @todo not the actual value, a guess, + needs to be calculated */ + *sint_ptr = 60000; + return sizeof(*sint_ptr); + case 4: /* tcpMaxConn */ + *sint_ptr = MEMP_NUM_TCP_PCB; + return sizeof(*sint_ptr); + case 5: /* tcpActiveOpens */ + *uint_ptr = STATS_GET(mib2.tcpactiveopens); + return sizeof(*uint_ptr); + case 6: /* tcpPassiveOpens */ + *uint_ptr = STATS_GET(mib2.tcppassiveopens); + return sizeof(*uint_ptr); + case 7: /* tcpAttemptFails */ + *uint_ptr = STATS_GET(mib2.tcpattemptfails); + return sizeof(*uint_ptr); + case 8: /* tcpEstabResets */ + *uint_ptr = STATS_GET(mib2.tcpestabresets); + return sizeof(*uint_ptr); + case 9: /* tcpCurrEstab */ + { + u16_t tcpcurrestab = 0; + struct tcp_pcb *pcb = tcp_active_pcbs; + while (pcb != NULL) { + if ((pcb->state == ESTABLISHED) || + (pcb->state == CLOSE_WAIT)) { + tcpcurrestab++; + } + pcb = pcb->next; + } + *uint_ptr = tcpcurrestab; + } + return sizeof(*uint_ptr); + case 10: /* tcpInSegs */ + *uint_ptr = STATS_GET(mib2.tcpinsegs); + return sizeof(*uint_ptr); + case 11: /* tcpOutSegs */ + *uint_ptr = STATS_GET(mib2.tcpoutsegs); + return sizeof(*uint_ptr); + case 12: /* tcpRetransSegs */ + *uint_ptr = STATS_GET(mib2.tcpretranssegs); + return sizeof(*uint_ptr); + case 14: /* tcpInErrs */ + *uint_ptr = STATS_GET(mib2.tcpinerrs); + return sizeof(*uint_ptr); + case 15: /* tcpOutRsts */ + *uint_ptr = STATS_GET(mib2.tcpoutrsts); + return sizeof(*uint_ptr); + case 17: /* tcpHCInSegs */ + memset(value, 0, 2*sizeof(u32_t)); /* not supported */ + return 2*sizeof(u32_t); + case 18: /* tcpHCOutSegs */ + memset(value, 0, 2*sizeof(u32_t)); /* not supported */ + return 2*sizeof(u32_t); + default: + LWIP_DEBUGF(SNMP_MIB_DEBUG,("tcp_get_value(): unknown id: %"S32_F"\n", instance->node->oid)); + break; + } + + return 0; +} + +/* --- tcpConnTable --- */ + +#if LWIP_IPV4 + +/* list of allowed value ranges for incoming OID */ +static const struct snmp_oid_range tcp_ConnTable_oid_ranges[] = { + { 0, 0xff }, /* IP A */ + { 0, 0xff }, /* IP B */ + { 0, 0xff }, /* IP C */ + { 0, 0xff }, /* IP D */ + { 0, 0xffff }, /* Port */ + { 0, 0xff }, /* IP A */ + { 0, 0xff }, /* IP B */ + { 0, 0xff }, /* IP C */ + { 0, 0xff }, /* IP D */ + { 0, 0xffff } /* Port */ +}; + +static snmp_err_t +tcp_ConnTable_get_cell_value_core(struct tcp_pcb *pcb, const u32_t* column, union snmp_variant_value* value, u32_t* value_len) +{ + LWIP_UNUSED_ARG(value_len); + + /* value */ + switch (*column) { + case 1: /* tcpConnState */ + value->u32 = pcb->state + 1; + break; + case 2: /* tcpConnLocalAddress */ + value->u32 = ip_2_ip4(&pcb->local_ip)->addr; + break; + case 3: /* tcpConnLocalPort */ + value->u32 = pcb->local_port; + break; + case 4: /* tcpConnRemAddress */ + if (pcb->state == LISTEN) { + value->u32 = IP4_ADDR_ANY4->addr; + } else { + value->u32 = ip_2_ip4(&pcb->remote_ip)->addr; + } + break; + case 5: /* tcpConnRemPort */ + if (pcb->state == LISTEN) { + value->u32 = 0; + } else { + value->u32 = pcb->remote_port; + } + break; + default: + LWIP_ASSERT("invalid id", 0); + return SNMP_ERR_NOSUCHINSTANCE; + } + + return SNMP_ERR_NOERROR; +} + +static snmp_err_t +tcp_ConnTable_get_cell_value(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, union snmp_variant_value* value, u32_t* value_len) +{ + u8_t i; + ip4_addr_t local_ip; + ip4_addr_t remote_ip; + u16_t local_port; + u16_t remote_port; + struct tcp_pcb *pcb; + + /* check if incoming OID length and if values are in plausible range */ + if (!snmp_oid_in_range(row_oid, row_oid_len, tcp_ConnTable_oid_ranges, LWIP_ARRAYSIZE(tcp_ConnTable_oid_ranges))) { + return SNMP_ERR_NOSUCHINSTANCE; + } + + /* get IPs and ports from incoming OID */ + snmp_oid_to_ip4(&row_oid[0], &local_ip); /* we know it succeeds because of oid_in_range check above */ + local_port = (u16_t)row_oid[4]; + snmp_oid_to_ip4(&row_oid[5], &remote_ip); /* we know it succeeds because of oid_in_range check above */ + remote_port = (u16_t)row_oid[9]; + + /* find tcp_pcb with requested ips and ports */ + for (i = 0; i < LWIP_ARRAYSIZE(tcp_pcb_lists); i++) { + pcb = *tcp_pcb_lists[i]; + + while (pcb != NULL) { + /* do local IP and local port match? */ + if (IP_IS_V4_VAL(pcb->local_ip) && + ip4_addr_cmp(&local_ip, ip_2_ip4(&pcb->local_ip)) && (local_port == pcb->local_port)) { + + /* PCBs in state LISTEN are not connected and have no remote_ip or remote_port */ + if (pcb->state == LISTEN) { + if (ip4_addr_cmp(&remote_ip, IP4_ADDR_ANY4) && (remote_port == 0)) { + /* fill in object properties */ + return tcp_ConnTable_get_cell_value_core(pcb, column, value, value_len); + } + } else { + if (IP_IS_V4_VAL(pcb->remote_ip) && + ip4_addr_cmp(&remote_ip, ip_2_ip4(&pcb->remote_ip)) && (remote_port == pcb->remote_port)) { + /* fill in object properties */ + return tcp_ConnTable_get_cell_value_core(pcb, column, value, value_len); + } + } + } + + pcb = pcb->next; + } + } + + /* not found */ + return SNMP_ERR_NOSUCHINSTANCE; +} + +static snmp_err_t +tcp_ConnTable_get_next_cell_instance_and_value(const u32_t* column, struct snmp_obj_id* row_oid, union snmp_variant_value* value, u32_t* value_len) +{ + u8_t i; + struct tcp_pcb *pcb; + struct snmp_next_oid_state state; + u32_t result_temp[LWIP_ARRAYSIZE(tcp_ConnTable_oid_ranges)]; + + /* init struct to search next oid */ + snmp_next_oid_init(&state, row_oid->id, row_oid->len, result_temp, LWIP_ARRAYSIZE(tcp_ConnTable_oid_ranges)); + + /* iterate over all possible OIDs to find the next one */ + for (i = 0; i < LWIP_ARRAYSIZE(tcp_pcb_lists); i++) { + pcb = *tcp_pcb_lists[i]; + while (pcb != NULL) { + u32_t test_oid[LWIP_ARRAYSIZE(tcp_ConnTable_oid_ranges)]; + + if (IP_IS_V4_VAL(pcb->local_ip)) { + snmp_ip4_to_oid(ip_2_ip4(&pcb->local_ip), &test_oid[0]); + test_oid[4] = pcb->local_port; + + /* PCBs in state LISTEN are not connected and have no remote_ip or remote_port */ + if (pcb->state == LISTEN) { + snmp_ip4_to_oid(IP4_ADDR_ANY4, &test_oid[5]); + test_oid[9] = 0; + } else { + if (IP_IS_V6_VAL(pcb->remote_ip)) { /* should never happen */ + continue; + } + snmp_ip4_to_oid(ip_2_ip4(&pcb->remote_ip), &test_oid[5]); + test_oid[9] = pcb->remote_port; + } + + /* check generated OID: is it a candidate for the next one? */ + snmp_next_oid_check(&state, test_oid, LWIP_ARRAYSIZE(tcp_ConnTable_oid_ranges), pcb); + } + + pcb = pcb->next; + } + } + + /* did we find a next one? */ + if (state.status == SNMP_NEXT_OID_STATUS_SUCCESS) { + snmp_oid_assign(row_oid, state.next_oid, state.next_oid_len); + /* fill in object properties */ + return tcp_ConnTable_get_cell_value_core((struct tcp_pcb*)state.reference, column, value, value_len); + } + + /* not found */ + return SNMP_ERR_NOSUCHINSTANCE; +} + +#endif /* LWIP_IPV4 */ + +/* --- tcpConnectionTable --- */ + +static snmp_err_t +tcp_ConnectionTable_get_cell_value_core(const u32_t* column, struct tcp_pcb *pcb, union snmp_variant_value* value) +{ + /* all items except tcpConnectionState and tcpConnectionProcess are declared as not-accessible */ + switch (*column) { + case 7: /* tcpConnectionState */ + value->u32 = pcb->state + 1; + break; + case 8: /* tcpConnectionProcess */ + value->u32 = 0; /* not supported */ + break; + default: + return SNMP_ERR_NOSUCHINSTANCE; + } + + return SNMP_ERR_NOERROR; +} + +static snmp_err_t +tcp_ConnectionTable_get_cell_value(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, union snmp_variant_value* value, u32_t* value_len) +{ + ip_addr_t local_ip, remote_ip; + u16_t local_port, remote_port; + struct tcp_pcb *pcb; + u8_t idx = 0; + u8_t i; + struct tcp_pcb ** const tcp_pcb_nonlisten_lists[] = {&tcp_bound_pcbs, &tcp_active_pcbs, &tcp_tw_pcbs}; + + LWIP_UNUSED_ARG(value_len); + + /* tcpConnectionLocalAddressType + tcpConnectionLocalAddress + tcpConnectionLocalPort */ + idx += snmp_oid_to_ip_port(&row_oid[idx], row_oid_len-idx, &local_ip, &local_port); + if (idx == 0) { + return SNMP_ERR_NOSUCHINSTANCE; + } + + /* tcpConnectionRemAddressType + tcpConnectionRemAddress + tcpConnectionRemPort */ + idx += snmp_oid_to_ip_port(&row_oid[idx], row_oid_len-idx, &remote_ip, &remote_port); + if (idx == 0) { + return SNMP_ERR_NOSUCHINSTANCE; + } + + /* find tcp_pcb with requested ip and port*/ + for (i = 0; i < LWIP_ARRAYSIZE(tcp_pcb_nonlisten_lists); i++) { + pcb = *tcp_pcb_nonlisten_lists[i]; + + while (pcb != NULL) { + if (ip_addr_cmp(&local_ip, &pcb->local_ip) && + (local_port == pcb->local_port) && + ip_addr_cmp(&remote_ip, &pcb->remote_ip) && + (remote_port == pcb->remote_port)) { + /* fill in object properties */ + return tcp_ConnectionTable_get_cell_value_core(column, pcb, value); + } + pcb = pcb->next; + } + } + + /* not found */ + return SNMP_ERR_NOSUCHINSTANCE; +} + +static snmp_err_t +tcp_ConnectionTable_get_next_cell_instance_and_value(const u32_t* column, struct snmp_obj_id* row_oid, union snmp_variant_value* value, u32_t* value_len) +{ + struct tcp_pcb *pcb; + struct snmp_next_oid_state state; + /* 1x tcpConnectionLocalAddressType + 1x OID len + 16x tcpConnectionLocalAddress + 1x tcpConnectionLocalPort + * 1x tcpConnectionRemAddressType + 1x OID len + 16x tcpConnectionRemAddress + 1x tcpConnectionRemPort */ + u32_t result_temp[38]; + u8_t i; + struct tcp_pcb ** const tcp_pcb_nonlisten_lists[] = {&tcp_bound_pcbs, &tcp_active_pcbs, &tcp_tw_pcbs}; + + LWIP_UNUSED_ARG(value_len); + + /* init struct to search next oid */ + snmp_next_oid_init(&state, row_oid->id, row_oid->len, result_temp, LWIP_ARRAYSIZE(result_temp)); + + /* iterate over all possible OIDs to find the next one */ + for (i = 0; i < LWIP_ARRAYSIZE(tcp_pcb_nonlisten_lists); i++) { + pcb = *tcp_pcb_nonlisten_lists[i]; + + while (pcb != NULL) { + u8_t idx = 0; + u32_t test_oid[LWIP_ARRAYSIZE(result_temp)]; + + /* tcpConnectionLocalAddressType + tcpConnectionLocalAddress + tcpConnectionLocalPort */ + idx += snmp_ip_port_to_oid(&pcb->local_ip, pcb->local_port, &test_oid[idx]); + + /* tcpConnectionRemAddressType + tcpConnectionRemAddress + tcpConnectionRemPort */ + idx += snmp_ip_port_to_oid(&pcb->remote_ip, pcb->remote_port, &test_oid[idx]); + + /* check generated OID: is it a candidate for the next one? */ + snmp_next_oid_check(&state, test_oid, idx, pcb); + + pcb = pcb->next; + } + } + + /* did we find a next one? */ + if (state.status == SNMP_NEXT_OID_STATUS_SUCCESS) { + snmp_oid_assign(row_oid, state.next_oid, state.next_oid_len); + /* fill in object properties */ + return tcp_ConnectionTable_get_cell_value_core(column, (struct tcp_pcb*)state.reference, value); + } else { + /* not found */ + return SNMP_ERR_NOSUCHINSTANCE; + } +} + +/* --- tcpListenerTable --- */ + +static snmp_err_t +tcp_ListenerTable_get_cell_value_core(const u32_t* column, union snmp_variant_value* value) +{ + /* all items except tcpListenerProcess are declared as not-accessible */ + switch (*column) { + case 4: /* tcpListenerProcess */ + value->u32 = 0; /* not supported */ + break; + default: + return SNMP_ERR_NOSUCHINSTANCE; + } + + return SNMP_ERR_NOERROR; +} + +static snmp_err_t +tcp_ListenerTable_get_cell_value(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, union snmp_variant_value* value, u32_t* value_len) +{ + ip_addr_t local_ip; + u16_t local_port; + struct tcp_pcb_listen *pcb; + u8_t idx = 0; + + LWIP_UNUSED_ARG(value_len); + + /* tcpListenerLocalAddressType + tcpListenerLocalAddress + tcpListenerLocalPort */ + idx += snmp_oid_to_ip_port(&row_oid[idx], row_oid_len-idx, &local_ip, &local_port); + if (idx == 0) { + return SNMP_ERR_NOSUCHINSTANCE; + } + + /* find tcp_pcb with requested ip and port*/ + pcb = tcp_listen_pcbs.listen_pcbs; + while (pcb != NULL) { + if (ip_addr_cmp(&local_ip, &pcb->local_ip) && + (local_port == pcb->local_port)) { + /* fill in object properties */ + return tcp_ListenerTable_get_cell_value_core(column, value); + } + pcb = pcb->next; + } + + /* not found */ + return SNMP_ERR_NOSUCHINSTANCE; +} + +static snmp_err_t +tcp_ListenerTable_get_next_cell_instance_and_value(const u32_t* column, struct snmp_obj_id* row_oid, union snmp_variant_value* value, u32_t* value_len) +{ + struct tcp_pcb_listen *pcb; + struct snmp_next_oid_state state; + /* 1x tcpListenerLocalAddressType + 1x OID len + 16x tcpListenerLocalAddress + 1x tcpListenerLocalPort */ + u32_t result_temp[19]; + + LWIP_UNUSED_ARG(value_len); + + /* init struct to search next oid */ + snmp_next_oid_init(&state, row_oid->id, row_oid->len, result_temp, LWIP_ARRAYSIZE(result_temp)); + + /* iterate over all possible OIDs to find the next one */ + pcb = tcp_listen_pcbs.listen_pcbs; + while (pcb != NULL) { + u8_t idx = 0; + u32_t test_oid[LWIP_ARRAYSIZE(result_temp)]; + + /* tcpListenerLocalAddressType + tcpListenerLocalAddress + tcpListenerLocalPort */ + idx += snmp_ip_port_to_oid(&pcb->local_ip, pcb->local_port, &test_oid[idx]); + + /* check generated OID: is it a candidate for the next one? */ + snmp_next_oid_check(&state, test_oid, idx, NULL); + + pcb = pcb->next; + } + + /* did we find a next one? */ + if (state.status == SNMP_NEXT_OID_STATUS_SUCCESS) { + snmp_oid_assign(row_oid, state.next_oid, state.next_oid_len); + /* fill in object properties */ + return tcp_ListenerTable_get_cell_value_core(column, value); + } else { + /* not found */ + return SNMP_ERR_NOSUCHINSTANCE; + } +} + +static const struct snmp_scalar_node tcp_RtoAlgorithm = SNMP_SCALAR_CREATE_NODE_READONLY(1, SNMP_ASN1_TYPE_INTEGER, tcp_get_value); +static const struct snmp_scalar_node tcp_RtoMin = SNMP_SCALAR_CREATE_NODE_READONLY(2, SNMP_ASN1_TYPE_INTEGER, tcp_get_value); +static const struct snmp_scalar_node tcp_RtoMax = SNMP_SCALAR_CREATE_NODE_READONLY(3, SNMP_ASN1_TYPE_INTEGER, tcp_get_value); +static const struct snmp_scalar_node tcp_MaxConn = SNMP_SCALAR_CREATE_NODE_READONLY(4, SNMP_ASN1_TYPE_INTEGER, tcp_get_value); +static const struct snmp_scalar_node tcp_ActiveOpens = SNMP_SCALAR_CREATE_NODE_READONLY(5, SNMP_ASN1_TYPE_COUNTER, tcp_get_value); +static const struct snmp_scalar_node tcp_PassiveOpens = SNMP_SCALAR_CREATE_NODE_READONLY(6, SNMP_ASN1_TYPE_COUNTER, tcp_get_value); +static const struct snmp_scalar_node tcp_AttemptFails = SNMP_SCALAR_CREATE_NODE_READONLY(7, SNMP_ASN1_TYPE_COUNTER, tcp_get_value); +static const struct snmp_scalar_node tcp_EstabResets = SNMP_SCALAR_CREATE_NODE_READONLY(8, SNMP_ASN1_TYPE_COUNTER, tcp_get_value); +static const struct snmp_scalar_node tcp_CurrEstab = SNMP_SCALAR_CREATE_NODE_READONLY(9, SNMP_ASN1_TYPE_GAUGE, tcp_get_value); +static const struct snmp_scalar_node tcp_InSegs = SNMP_SCALAR_CREATE_NODE_READONLY(10, SNMP_ASN1_TYPE_COUNTER, tcp_get_value); +static const struct snmp_scalar_node tcp_OutSegs = SNMP_SCALAR_CREATE_NODE_READONLY(11, SNMP_ASN1_TYPE_COUNTER, tcp_get_value); +static const struct snmp_scalar_node tcp_RetransSegs = SNMP_SCALAR_CREATE_NODE_READONLY(12, SNMP_ASN1_TYPE_COUNTER, tcp_get_value); +static const struct snmp_scalar_node tcp_InErrs = SNMP_SCALAR_CREATE_NODE_READONLY(14, SNMP_ASN1_TYPE_COUNTER, tcp_get_value); +static const struct snmp_scalar_node tcp_OutRsts = SNMP_SCALAR_CREATE_NODE_READONLY(15, SNMP_ASN1_TYPE_COUNTER, tcp_get_value); +static const struct snmp_scalar_node tcp_HCInSegs = SNMP_SCALAR_CREATE_NODE_READONLY(17, SNMP_ASN1_TYPE_COUNTER64, tcp_get_value); +static const struct snmp_scalar_node tcp_HCOutSegs = SNMP_SCALAR_CREATE_NODE_READONLY(18, SNMP_ASN1_TYPE_COUNTER64, tcp_get_value); + +#if LWIP_IPV4 +static const struct snmp_table_simple_col_def tcp_ConnTable_columns[] = { + { 1, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* tcpConnState */ + { 2, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* tcpConnLocalAddress */ + { 3, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* tcpConnLocalPort */ + { 4, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* tcpConnRemAddress */ + { 5, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 } /* tcpConnRemPort */ +}; + +static const struct snmp_table_simple_node tcp_ConnTable = SNMP_TABLE_CREATE_SIMPLE(13, tcp_ConnTable_columns, tcp_ConnTable_get_cell_value, tcp_ConnTable_get_next_cell_instance_and_value); +#endif /* LWIP_IPV4 */ + +static const struct snmp_table_simple_col_def tcp_ConnectionTable_columns[] = { + /* all items except tcpConnectionState and tcpConnectionProcess are declared as not-accessible */ + { 7, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 }, /* tcpConnectionState */ + { 8, SNMP_ASN1_TYPE_UNSIGNED32, SNMP_VARIANT_VALUE_TYPE_U32 } /* tcpConnectionProcess */ +}; + +static const struct snmp_table_simple_node tcp_ConnectionTable = SNMP_TABLE_CREATE_SIMPLE(19, tcp_ConnectionTable_columns, tcp_ConnectionTable_get_cell_value, tcp_ConnectionTable_get_next_cell_instance_and_value); + + +static const struct snmp_table_simple_col_def tcp_ListenerTable_columns[] = { + /* all items except tcpListenerProcess are declared as not-accessible */ + { 4, SNMP_ASN1_TYPE_UNSIGNED32, SNMP_VARIANT_VALUE_TYPE_U32 } /* tcpListenerProcess */ +}; + +static const struct snmp_table_simple_node tcp_ListenerTable = SNMP_TABLE_CREATE_SIMPLE(20, tcp_ListenerTable_columns, tcp_ListenerTable_get_cell_value, tcp_ListenerTable_get_next_cell_instance_and_value); + +/* the following nodes access variables in LWIP stack from SNMP worker thread and must therefore be synced to LWIP (TCPIP) thread */ +CREATE_LWIP_SYNC_NODE( 1, tcp_RtoAlgorithm) +CREATE_LWIP_SYNC_NODE( 2, tcp_RtoMin) +CREATE_LWIP_SYNC_NODE( 3, tcp_RtoMax) +CREATE_LWIP_SYNC_NODE( 4, tcp_MaxConn) +CREATE_LWIP_SYNC_NODE( 5, tcp_ActiveOpens) +CREATE_LWIP_SYNC_NODE( 6, tcp_PassiveOpens) +CREATE_LWIP_SYNC_NODE( 7, tcp_AttemptFails) +CREATE_LWIP_SYNC_NODE( 8, tcp_EstabResets) +CREATE_LWIP_SYNC_NODE( 9, tcp_CurrEstab) +CREATE_LWIP_SYNC_NODE(10, tcp_InSegs) +CREATE_LWIP_SYNC_NODE(11, tcp_OutSegs) +CREATE_LWIP_SYNC_NODE(12, tcp_RetransSegs) +#if LWIP_IPV4 +CREATE_LWIP_SYNC_NODE(13, tcp_ConnTable) +#endif /* LWIP_IPV4 */ +CREATE_LWIP_SYNC_NODE(14, tcp_InErrs) +CREATE_LWIP_SYNC_NODE(15, tcp_OutRsts) +CREATE_LWIP_SYNC_NODE(17, tcp_HCInSegs) +CREATE_LWIP_SYNC_NODE(18, tcp_HCOutSegs) +CREATE_LWIP_SYNC_NODE(19, tcp_ConnectionTable) +CREATE_LWIP_SYNC_NODE(20, tcp_ListenerTable) + +static const struct snmp_node* const tcp_nodes[] = { + &SYNC_NODE_NAME(tcp_RtoAlgorithm).node.node, + &SYNC_NODE_NAME(tcp_RtoMin).node.node, + &SYNC_NODE_NAME(tcp_RtoMax).node.node, + &SYNC_NODE_NAME(tcp_MaxConn).node.node, + &SYNC_NODE_NAME(tcp_ActiveOpens).node.node, + &SYNC_NODE_NAME(tcp_PassiveOpens).node.node, + &SYNC_NODE_NAME(tcp_AttemptFails).node.node, + &SYNC_NODE_NAME(tcp_EstabResets).node.node, + &SYNC_NODE_NAME(tcp_CurrEstab).node.node, + &SYNC_NODE_NAME(tcp_InSegs).node.node, + &SYNC_NODE_NAME(tcp_OutSegs).node.node, + &SYNC_NODE_NAME(tcp_RetransSegs).node.node, +#if LWIP_IPV4 + &SYNC_NODE_NAME(tcp_ConnTable).node.node, +#endif /* LWIP_IPV4 */ + &SYNC_NODE_NAME(tcp_InErrs).node.node, + &SYNC_NODE_NAME(tcp_OutRsts).node.node, + &SYNC_NODE_NAME(tcp_HCInSegs).node.node, + &SYNC_NODE_NAME(tcp_HCOutSegs).node.node, + &SYNC_NODE_NAME(tcp_ConnectionTable).node.node, + &SYNC_NODE_NAME(tcp_ListenerTable).node.node +}; + +const struct snmp_tree_node snmp_mib2_tcp_root = SNMP_CREATE_TREE_NODE(6, tcp_nodes); +#endif /* LWIP_SNMP && SNMP_LWIP_MIB2 && LWIP_TCP */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2_udp.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2_udp.c new file mode 100644 index 0000000..6a983df --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_mib2_udp.c @@ -0,0 +1,357 @@ +/** + * @file + * Management Information Base II (RFC1213) UDP objects and functions. + */ + +/* + * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Dirk Ziegelmeier <dziegel@gmx.de> + * Christiaan Simons <christiaan.simons@axon.tv> + */ + +#include "lwip/snmp.h" +#include "lwip/apps/snmp.h" +#include "lwip/apps/snmp_core.h" +#include "lwip/apps/snmp_mib2.h" +#include "lwip/apps/snmp_table.h" +#include "lwip/apps/snmp_scalar.h" +#include "lwip/udp.h" +#include "lwip/stats.h" + +#include <string.h> + +#if LWIP_SNMP && SNMP_LWIP_MIB2 && LWIP_UDP + +#if SNMP_USE_NETCONN +#define SYNC_NODE_NAME(node_name) node_name ## _synced +#define CREATE_LWIP_SYNC_NODE(oid, node_name) \ + static const struct snmp_threadsync_node node_name ## _synced = SNMP_CREATE_THREAD_SYNC_NODE(oid, &node_name.node, &snmp_mib2_lwip_locks); +#else +#define SYNC_NODE_NAME(node_name) node_name +#define CREATE_LWIP_SYNC_NODE(oid, node_name) +#endif + +/* --- udp .1.3.6.1.2.1.7 ----------------------------------------------------- */ + +static s16_t +udp_get_value(struct snmp_node_instance* instance, void* value) +{ + u32_t *uint_ptr = (u32_t*)value; + + switch (instance->node->oid) { + case 1: /* udpInDatagrams */ + *uint_ptr = STATS_GET(mib2.udpindatagrams); + return sizeof(*uint_ptr); + case 2: /* udpNoPorts */ + *uint_ptr = STATS_GET(mib2.udpnoports); + return sizeof(*uint_ptr); + case 3: /* udpInErrors */ + *uint_ptr = STATS_GET(mib2.udpinerrors); + return sizeof(*uint_ptr); + case 4: /* udpOutDatagrams */ + *uint_ptr = STATS_GET(mib2.udpoutdatagrams); + return sizeof(*uint_ptr); + case 8: /* udpHCInDatagrams */ + memset(value, 0, 2*sizeof(u32_t)); /* not supported */ + return 2*sizeof(u32_t); + case 9: /* udpHCOutDatagrams */ + memset(value, 0, 2*sizeof(u32_t)); /* not supported */ + return 2*sizeof(u32_t); + default: + LWIP_DEBUGF(SNMP_MIB_DEBUG,("udp_get_value(): unknown id: %"S32_F"\n", instance->node->oid)); + break; + } + + return 0; +} + +/* --- udpEndpointTable --- */ + +static snmp_err_t +udp_endpointTable_get_cell_value_core(const u32_t* column, union snmp_variant_value* value) +{ + /* all items except udpEndpointProcess are declared as not-accessible */ + switch (*column) { + case 8: /* udpEndpointProcess */ + value->u32 = 0; /* not supported */ + break; + default: + return SNMP_ERR_NOSUCHINSTANCE; + } + + return SNMP_ERR_NOERROR; +} + +static snmp_err_t +udp_endpointTable_get_cell_value(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, union snmp_variant_value* value, u32_t* value_len) +{ + ip_addr_t local_ip, remote_ip; + u16_t local_port, remote_port; + struct udp_pcb *pcb; + u8_t idx = 0; + + LWIP_UNUSED_ARG(value_len); + + /* udpEndpointLocalAddressType + udpEndpointLocalAddress + udpEndpointLocalPort */ + idx += snmp_oid_to_ip_port(&row_oid[idx], row_oid_len-idx, &local_ip, &local_port); + if (idx == 0) { + return SNMP_ERR_NOSUCHINSTANCE; + } + + /* udpEndpointRemoteAddressType + udpEndpointRemoteAddress + udpEndpointRemotePort */ + idx += snmp_oid_to_ip_port(&row_oid[idx], row_oid_len-idx, &remote_ip, &remote_port); + if (idx == 0) { + return SNMP_ERR_NOSUCHINSTANCE; + } + + /* udpEndpointInstance */ + if (row_oid_len < (idx+1)) { + return SNMP_ERR_NOSUCHINSTANCE; + } + if (row_oid[idx] != 0) { + return SNMP_ERR_NOSUCHINSTANCE; + } + + /* find udp_pcb with requested ip and port*/ + pcb = udp_pcbs; + while (pcb != NULL) { + if (ip_addr_cmp(&local_ip, &pcb->local_ip) && + (local_port == pcb->local_port) && + ip_addr_cmp(&remote_ip, &pcb->remote_ip) && + (remote_port == pcb->remote_port)) { + /* fill in object properties */ + return udp_endpointTable_get_cell_value_core(column, value); + } + pcb = pcb->next; + } + + /* not found */ + return SNMP_ERR_NOSUCHINSTANCE; +} + +static snmp_err_t +udp_endpointTable_get_next_cell_instance_and_value(const u32_t* column, struct snmp_obj_id* row_oid, union snmp_variant_value* value, u32_t* value_len) +{ + struct udp_pcb *pcb; + struct snmp_next_oid_state state; + /* 1x udpEndpointLocalAddressType + 1x OID len + 16x udpEndpointLocalAddress + 1x udpEndpointLocalPort + + * 1x udpEndpointRemoteAddressType + 1x OID len + 16x udpEndpointRemoteAddress + 1x udpEndpointRemotePort + + * 1x udpEndpointInstance = 39 + */ + u32_t result_temp[39]; + + LWIP_UNUSED_ARG(value_len); + + /* init struct to search next oid */ + snmp_next_oid_init(&state, row_oid->id, row_oid->len, result_temp, LWIP_ARRAYSIZE(result_temp)); + + /* iterate over all possible OIDs to find the next one */ + pcb = udp_pcbs; + while (pcb != NULL) { + u32_t test_oid[LWIP_ARRAYSIZE(result_temp)]; + u8_t idx = 0; + + /* udpEndpointLocalAddressType + udpEndpointLocalAddress + udpEndpointLocalPort */ + idx += snmp_ip_port_to_oid(&pcb->local_ip, pcb->local_port, &test_oid[idx]); + + /* udpEndpointRemoteAddressType + udpEndpointRemoteAddress + udpEndpointRemotePort */ + idx += snmp_ip_port_to_oid(&pcb->remote_ip, pcb->remote_port, &test_oid[idx]); + + test_oid[idx] = 0; /* udpEndpointInstance */ + idx++; + + /* check generated OID: is it a candidate for the next one? */ + snmp_next_oid_check(&state, test_oid, idx, NULL); + + pcb = pcb->next; + } + + /* did we find a next one? */ + if (state.status == SNMP_NEXT_OID_STATUS_SUCCESS) { + snmp_oid_assign(row_oid, state.next_oid, state.next_oid_len); + /* fill in object properties */ + return udp_endpointTable_get_cell_value_core(column, value); + } else { + /* not found */ + return SNMP_ERR_NOSUCHINSTANCE; + } +} + +/* --- udpTable --- */ + +#if LWIP_IPV4 + +/* list of allowed value ranges for incoming OID */ +static const struct snmp_oid_range udp_Table_oid_ranges[] = { + { 0, 0xff }, /* IP A */ + { 0, 0xff }, /* IP B */ + { 0, 0xff }, /* IP C */ + { 0, 0xff }, /* IP D */ + { 1, 0xffff } /* Port */ +}; + +static snmp_err_t +udp_Table_get_cell_value_core(struct udp_pcb *pcb, const u32_t* column, union snmp_variant_value* value, u32_t* value_len) +{ + LWIP_UNUSED_ARG(value_len); + + switch (*column) { + case 1: /* udpLocalAddress */ + /* set reference to PCB local IP and return a generic node that copies IP4 addresses */ + value->u32 = ip_2_ip4(&pcb->local_ip)->addr; + break; + case 2: /* udpLocalPort */ + /* set reference to PCB local port and return a generic node that copies u16_t values */ + value->u32 = pcb->local_port; + break; + default: + return SNMP_ERR_NOSUCHINSTANCE; + } + + return SNMP_ERR_NOERROR; +} + +static snmp_err_t +udp_Table_get_cell_value(const u32_t* column, const u32_t* row_oid, u8_t row_oid_len, union snmp_variant_value* value, u32_t* value_len) +{ + ip4_addr_t ip; + u16_t port; + struct udp_pcb *pcb; + + /* check if incoming OID length and if values are in plausible range */ + if (!snmp_oid_in_range(row_oid, row_oid_len, udp_Table_oid_ranges, LWIP_ARRAYSIZE(udp_Table_oid_ranges))) { + return SNMP_ERR_NOSUCHINSTANCE; + } + + /* get IP and port from incoming OID */ + snmp_oid_to_ip4(&row_oid[0], &ip); /* we know it succeeds because of oid_in_range check above */ + port = (u16_t)row_oid[4]; + + /* find udp_pcb with requested ip and port*/ + pcb = udp_pcbs; + while (pcb != NULL) { + if (IP_IS_V4_VAL(pcb->local_ip)) { + if (ip4_addr_cmp(&ip, ip_2_ip4(&pcb->local_ip)) && (port == pcb->local_port)) { + /* fill in object properties */ + return udp_Table_get_cell_value_core(pcb, column, value, value_len); + } + } + pcb = pcb->next; + } + + /* not found */ + return SNMP_ERR_NOSUCHINSTANCE; +} + +static snmp_err_t +udp_Table_get_next_cell_instance_and_value(const u32_t* column, struct snmp_obj_id* row_oid, union snmp_variant_value* value, u32_t* value_len) +{ + struct udp_pcb *pcb; + struct snmp_next_oid_state state; + u32_t result_temp[LWIP_ARRAYSIZE(udp_Table_oid_ranges)]; + + /* init struct to search next oid */ + snmp_next_oid_init(&state, row_oid->id, row_oid->len, result_temp, LWIP_ARRAYSIZE(udp_Table_oid_ranges)); + + /* iterate over all possible OIDs to find the next one */ + pcb = udp_pcbs; + while (pcb != NULL) { + u32_t test_oid[LWIP_ARRAYSIZE(udp_Table_oid_ranges)]; + + if (IP_IS_V4_VAL(pcb->local_ip)) { + snmp_ip4_to_oid(ip_2_ip4(&pcb->local_ip), &test_oid[0]); + test_oid[4] = pcb->local_port; + + /* check generated OID: is it a candidate for the next one? */ + snmp_next_oid_check(&state, test_oid, LWIP_ARRAYSIZE(udp_Table_oid_ranges), pcb); + } + + pcb = pcb->next; + } + + /* did we find a next one? */ + if (state.status == SNMP_NEXT_OID_STATUS_SUCCESS) { + snmp_oid_assign(row_oid, state.next_oid, state.next_oid_len); + /* fill in object properties */ + return udp_Table_get_cell_value_core((struct udp_pcb*)state.reference, column, value, value_len); + } else { + /* not found */ + return SNMP_ERR_NOSUCHINSTANCE; + } +} + +#endif /* LWIP_IPV4 */ + +static const struct snmp_scalar_node udp_inDatagrams = SNMP_SCALAR_CREATE_NODE_READONLY(1, SNMP_ASN1_TYPE_COUNTER, udp_get_value); +static const struct snmp_scalar_node udp_noPorts = SNMP_SCALAR_CREATE_NODE_READONLY(2, SNMP_ASN1_TYPE_COUNTER, udp_get_value); +static const struct snmp_scalar_node udp_inErrors = SNMP_SCALAR_CREATE_NODE_READONLY(3, SNMP_ASN1_TYPE_COUNTER, udp_get_value); +static const struct snmp_scalar_node udp_outDatagrams = SNMP_SCALAR_CREATE_NODE_READONLY(4, SNMP_ASN1_TYPE_COUNTER, udp_get_value); +static const struct snmp_scalar_node udp_HCInDatagrams = SNMP_SCALAR_CREATE_NODE_READONLY(8, SNMP_ASN1_TYPE_COUNTER64, udp_get_value); +static const struct snmp_scalar_node udp_HCOutDatagrams = SNMP_SCALAR_CREATE_NODE_READONLY(9, SNMP_ASN1_TYPE_COUNTER64, udp_get_value); + +#if LWIP_IPV4 +static const struct snmp_table_simple_col_def udp_Table_columns[] = { + { 1, SNMP_ASN1_TYPE_IPADDR, SNMP_VARIANT_VALUE_TYPE_U32 }, /* udpLocalAddress */ + { 2, SNMP_ASN1_TYPE_INTEGER, SNMP_VARIANT_VALUE_TYPE_U32 } /* udpLocalPort */ +}; +static const struct snmp_table_simple_node udp_Table = SNMP_TABLE_CREATE_SIMPLE(5, udp_Table_columns, udp_Table_get_cell_value, udp_Table_get_next_cell_instance_and_value); +#endif /* LWIP_IPV4 */ + +static const struct snmp_table_simple_col_def udp_endpointTable_columns[] = { + /* all items except udpEndpointProcess are declared as not-accessible */ + { 8, SNMP_ASN1_TYPE_UNSIGNED32, SNMP_VARIANT_VALUE_TYPE_U32 } /* udpEndpointProcess */ +}; + +static const struct snmp_table_simple_node udp_endpointTable = SNMP_TABLE_CREATE_SIMPLE(7, udp_endpointTable_columns, udp_endpointTable_get_cell_value, udp_endpointTable_get_next_cell_instance_and_value); + +/* the following nodes access variables in LWIP stack from SNMP worker thread and must therefore be synced to LWIP (TCPIP) thread */ +CREATE_LWIP_SYNC_NODE(1, udp_inDatagrams) +CREATE_LWIP_SYNC_NODE(2, udp_noPorts) +CREATE_LWIP_SYNC_NODE(3, udp_inErrors) +CREATE_LWIP_SYNC_NODE(4, udp_outDatagrams) +#if LWIP_IPV4 +CREATE_LWIP_SYNC_NODE(5, udp_Table) +#endif /* LWIP_IPV4 */ +CREATE_LWIP_SYNC_NODE(7, udp_endpointTable) +CREATE_LWIP_SYNC_NODE(8, udp_HCInDatagrams) +CREATE_LWIP_SYNC_NODE(9, udp_HCOutDatagrams) + +static const struct snmp_node* const udp_nodes[] = { + &SYNC_NODE_NAME(udp_inDatagrams).node.node, + &SYNC_NODE_NAME(udp_noPorts).node.node, + &SYNC_NODE_NAME(udp_inErrors).node.node, + &SYNC_NODE_NAME(udp_outDatagrams).node.node, +#if LWIP_IPV4 + &SYNC_NODE_NAME(udp_Table).node.node, +#endif /* LWIP_IPV4 */ + &SYNC_NODE_NAME(udp_endpointTable).node.node, + &SYNC_NODE_NAME(udp_HCInDatagrams).node.node, + &SYNC_NODE_NAME(udp_HCOutDatagrams).node.node +}; + +const struct snmp_tree_node snmp_mib2_udp_root = SNMP_CREATE_TREE_NODE(7, udp_nodes); +#endif /* LWIP_SNMP && SNMP_LWIP_MIB2 && LWIP_UDP */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_msg.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_msg.c new file mode 100644 index 0000000..0cb7ca9 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_msg.c @@ -0,0 +1,1668 @@ +/** + * @file + * SNMP message processing (RFC1157). + */ + +/* + * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands. + * Copyright (c) 2016 Elias Oenal. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Christiaan Simons <christiaan.simons@axon.tv> + * Martin Hentschel <info@cl-soft.de> + * Elias Oenal <lwip@eliasoenal.com> + */ + +#include "lwip/apps/snmp_opts.h" + +#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */ + +#include "snmp_msg.h" +#include "snmp_asn1.h" +#include "snmp_core_priv.h" +#include "lwip/ip_addr.h" +#include "lwip/stats.h" + +#if LWIP_SNMP_V3 +#include "lwip/apps/snmpv3.h" +#include "snmpv3_priv.h" +#ifdef LWIP_SNMPV3_INCLUDE_ENGINE +#include LWIP_SNMPV3_INCLUDE_ENGINE +#endif +#endif + +#include <string.h> + +/* public (non-static) constants */ +/** SNMP community string */ +const char *snmp_community = SNMP_COMMUNITY; +/** SNMP community string for write access */ +const char *snmp_community_write = SNMP_COMMUNITY_WRITE; +/** SNMP community string for sending traps */ +const char *snmp_community_trap = SNMP_COMMUNITY_TRAP; + +snmp_write_callback_fct snmp_write_callback = NULL; +void* snmp_write_callback_arg = NULL; + +/** + * @ingroup snmp_core + * Returns current SNMP community string. + * @return current SNMP community string + */ +const char * +snmp_get_community(void) +{ + return snmp_community; +} + +/** + * @ingroup snmp_core + * Sets SNMP community string. + * The string itself (its storage) must be valid throughout the whole life of + * program (or until it is changed to sth else). + * + * @param community is a pointer to new community string + */ +void +snmp_set_community(const char * const community) +{ + LWIP_ASSERT("community string is too long!", strlen(community) <= SNMP_MAX_COMMUNITY_STR_LEN); + snmp_community = community; +} + +/** + * @ingroup snmp_core + * Returns current SNMP write-access community string. + * @return current SNMP write-access community string + */ +const char * +snmp_get_community_write(void) +{ + return snmp_community_write; +} + +/** + * @ingroup snmp_traps + * Returns current SNMP community string used for sending traps. + * @return current SNMP community string used for sending traps + */ +const char * +snmp_get_community_trap(void) +{ + return snmp_community_trap; +} + +/** + * @ingroup snmp_core + * Sets SNMP community string for write-access. + * The string itself (its storage) must be valid throughout the whole life of + * program (or until it is changed to sth else). + * + * @param community is a pointer to new write-access community string + */ +void +snmp_set_community_write(const char * const community) +{ + LWIP_ASSERT("community string must not be NULL", community != NULL); + LWIP_ASSERT("community string is too long!", strlen(community) <= SNMP_MAX_COMMUNITY_STR_LEN); + snmp_community_write = community; +} + +/** + * @ingroup snmp_traps + * Sets SNMP community string used for sending traps. + * The string itself (its storage) must be valid throughout the whole life of + * program (or until it is changed to sth else). + * + * @param community is a pointer to new trap community string + */ +void +snmp_set_community_trap(const char * const community) +{ + LWIP_ASSERT("community string is too long!", strlen(community) <= SNMP_MAX_COMMUNITY_STR_LEN); + snmp_community_trap = community; +} + +/** + * @ingroup snmp_core + * Callback fired on every successful write access + */ +void +snmp_set_write_callback(snmp_write_callback_fct write_callback, void* callback_arg) +{ + snmp_write_callback = write_callback; + snmp_write_callback_arg = callback_arg; +} + +/* ----------------------------------------------------------------------- */ +/* forward declarations */ +/* ----------------------------------------------------------------------- */ + +static err_t snmp_process_get_request(struct snmp_request *request); +static err_t snmp_process_getnext_request(struct snmp_request *request); +static err_t snmp_process_getbulk_request(struct snmp_request *request); +static err_t snmp_process_set_request(struct snmp_request *request); + +static err_t snmp_parse_inbound_frame(struct snmp_request *request); +static err_t snmp_prepare_outbound_frame(struct snmp_request *request); +static err_t snmp_complete_outbound_frame(struct snmp_request *request); +static void snmp_execute_write_callbacks(struct snmp_request *request); + + +/* ----------------------------------------------------------------------- */ +/* implementation */ +/* ----------------------------------------------------------------------- */ + +void +snmp_receive(void *handle, struct pbuf *p, const ip_addr_t *source_ip, u16_t port) +{ + err_t err; + struct snmp_request request; + + memset(&request, 0, sizeof(request)); + request.handle = handle; + request.source_ip = source_ip; + request.source_port = port; + request.inbound_pbuf = p; + + snmp_stats.inpkts++; + + err = snmp_parse_inbound_frame(&request); + if (err == ERR_OK) { + err = snmp_prepare_outbound_frame(&request); + if (err == ERR_OK) { + + if (request.error_status == SNMP_ERR_NOERROR) { + /* only process frame if we do not already have an error to return (e.g. all readonly) */ + if (request.request_type == SNMP_ASN1_CONTEXT_PDU_GET_REQ) { + err = snmp_process_get_request(&request); + } else if (request.request_type == SNMP_ASN1_CONTEXT_PDU_GET_NEXT_REQ) { + err = snmp_process_getnext_request(&request); + } else if (request.request_type == SNMP_ASN1_CONTEXT_PDU_GET_BULK_REQ) { + err = snmp_process_getbulk_request(&request); + } else if (request.request_type == SNMP_ASN1_CONTEXT_PDU_SET_REQ) { + err = snmp_process_set_request(&request); + } + } + + if (err == ERR_OK) { + err = snmp_complete_outbound_frame(&request); + + if (err == ERR_OK) { + err = snmp_sendto(request.handle, request.outbound_pbuf, request.source_ip, request.source_port); + + if ((request.request_type == SNMP_ASN1_CONTEXT_PDU_SET_REQ) + && (request.error_status == SNMP_ERR_NOERROR) + && (snmp_write_callback != NULL)) { + /* raise write notification for all written objects */ + snmp_execute_write_callbacks(&request); + } + } + } + } + + if (request.outbound_pbuf != NULL) { + pbuf_free(request.outbound_pbuf); + } + } +} + +static u8_t +snmp_msg_getnext_validate_node_inst(struct snmp_node_instance* node_instance, void* validate_arg) +{ + if (((node_instance->access & SNMP_NODE_INSTANCE_ACCESS_READ) != SNMP_NODE_INSTANCE_ACCESS_READ) || (node_instance->get_value == NULL)) { + return SNMP_ERR_NOSUCHINSTANCE; + } + + if ((node_instance->asn1_type == SNMP_ASN1_TYPE_COUNTER64) && (((struct snmp_request*)validate_arg)->version == SNMP_VERSION_1)) { + /* according to RFC 2089 skip Counter64 objects in GetNext requests from v1 clients */ + return SNMP_ERR_NOSUCHINSTANCE; + } + + return SNMP_ERR_NOERROR; +} + +static void +snmp_process_varbind(struct snmp_request *request, struct snmp_varbind *vb, u8_t get_next) +{ + err_t err; + struct snmp_node_instance node_instance; + memset(&node_instance, 0, sizeof(node_instance)); + + if (get_next) { + struct snmp_obj_id result_oid; + request->error_status = snmp_get_next_node_instance_from_oid(vb->oid.id, vb->oid.len, snmp_msg_getnext_validate_node_inst, request, &result_oid, &node_instance); + + if (request->error_status == SNMP_ERR_NOERROR) { + snmp_oid_assign(&vb->oid, result_oid.id, result_oid.len); + } + } else { + request->error_status = snmp_get_node_instance_from_oid(vb->oid.id, vb->oid.len, &node_instance); + + if (request->error_status == SNMP_ERR_NOERROR) { + /* use 'getnext_validate' method for validation to avoid code duplication (some checks have to be executed here) */ + request->error_status = snmp_msg_getnext_validate_node_inst(&node_instance, request); + + if (request->error_status != SNMP_ERR_NOERROR) { + if (node_instance.release_instance != NULL) { + node_instance.release_instance(&node_instance); + } + } + } + } + + if (request->error_status != SNMP_ERR_NOERROR) { + if (request->error_status >= SNMP_VARBIND_EXCEPTION_OFFSET) { + if ((request->version == SNMP_VERSION_2c) || request->version == SNMP_VERSION_3) { + /* in SNMP v2c a varbind related exception is stored in varbind and not in frame header */ + vb->type = (SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_CLASS_CONTEXT | (request->error_status & SNMP_VARBIND_EXCEPTION_MASK)); + vb->value_len = 0; + + err = snmp_append_outbound_varbind(&(request->outbound_pbuf_stream), vb); + if (err == ERR_OK) { + /* we stored the exception in varbind -> go on */ + request->error_status = SNMP_ERR_NOERROR; + } else if (err == ERR_BUF) { + request->error_status = SNMP_ERR_TOOBIG; + } else { + request->error_status = SNMP_ERR_GENERROR; + } + } + } else { + /* according to RFC 1157/1905, all other errors only return genError */ + request->error_status = SNMP_ERR_GENERROR; + } + } else { + s16_t len = node_instance.get_value(&node_instance, vb->value); + vb->type = node_instance.asn1_type; + + if(len >= 0) { + vb->value_len = (u16_t)len; /* cast is OK because we checked >= 0 above */ + + LWIP_ASSERT("SNMP_MAX_VALUE_SIZE is configured too low", (vb->value_len & ~SNMP_GET_VALUE_RAW_DATA) <= SNMP_MAX_VALUE_SIZE); + err = snmp_append_outbound_varbind(&request->outbound_pbuf_stream, vb); + + if (err == ERR_BUF) { + request->error_status = SNMP_ERR_TOOBIG; + } else if (err != ERR_OK) { + request->error_status = SNMP_ERR_GENERROR; + } + } else { + request->error_status = SNMP_ERR_GENERROR; + } + + if (node_instance.release_instance != NULL) { + node_instance.release_instance(&node_instance); + } + } +} + + +/** + * Service an internal or external event for SNMP GET. + * + * @param request points to the associated message process state + */ +static err_t +snmp_process_get_request(struct snmp_request *request) +{ + snmp_vb_enumerator_err_t err; + struct snmp_varbind vb; + vb.value = request->value_buffer; + + LWIP_DEBUGF(SNMP_DEBUG, ("SNMP get request\n")); + + while (request->error_status == SNMP_ERR_NOERROR) { + err = snmp_vb_enumerator_get_next(&request->inbound_varbind_enumerator, &vb); + if (err == SNMP_VB_ENUMERATOR_ERR_OK) { + if ((vb.type == SNMP_ASN1_TYPE_NULL) && (vb.value_len == 0)) { + snmp_process_varbind(request, &vb, 0); + } else { + request->error_status = SNMP_ERR_GENERROR; + } + } else if (err == SNMP_VB_ENUMERATOR_ERR_EOVB) { + /* no more varbinds in request */ + break; + } else if (err == SNMP_VB_ENUMERATOR_ERR_ASN1ERROR) { + /* malformed ASN.1, don't answer */ + return ERR_ARG; + } else { + request->error_status = SNMP_ERR_GENERROR; + } + } + + return ERR_OK; +} + +/** + * Service an internal or external event for SNMP GET. + * + * @param request points to the associated message process state + */ +static err_t +snmp_process_getnext_request(struct snmp_request *request) +{ + snmp_vb_enumerator_err_t err; + struct snmp_varbind vb; + vb.value = request->value_buffer; + + LWIP_DEBUGF(SNMP_DEBUG, ("SNMP get-next request\n")); + + while (request->error_status == SNMP_ERR_NOERROR) { + err = snmp_vb_enumerator_get_next(&request->inbound_varbind_enumerator, &vb); + if (err == SNMP_VB_ENUMERATOR_ERR_OK) { + if ((vb.type == SNMP_ASN1_TYPE_NULL) && (vb.value_len == 0)) { + snmp_process_varbind(request, &vb, 1); + } else { + request->error_status = SNMP_ERR_GENERROR; + } + } else if (err == SNMP_VB_ENUMERATOR_ERR_EOVB) { + /* no more varbinds in request */ + break; + } else if (err == SNMP_VB_ENUMERATOR_ERR_ASN1ERROR) { + /* malformed ASN.1, don't answer */ + return ERR_ARG; + } else { + request->error_status = SNMP_ERR_GENERROR; + } + } + + return ERR_OK; +} + +/** + * Service an internal or external event for SNMP GETBULKT. + * + * @param request points to the associated message process state + */ +static err_t +snmp_process_getbulk_request(struct snmp_request *request) +{ + snmp_vb_enumerator_err_t err; + s32_t non_repeaters = request->non_repeaters; + s32_t repetitions; + u16_t repetition_offset = 0; + struct snmp_varbind_enumerator repetition_varbind_enumerator; + struct snmp_varbind vb; + vb.value = request->value_buffer; + + if (SNMP_LWIP_GETBULK_MAX_REPETITIONS > 0) { + repetitions = LWIP_MIN(request->max_repetitions, SNMP_LWIP_GETBULK_MAX_REPETITIONS); + } else { + repetitions = request->max_repetitions; + } + + LWIP_DEBUGF(SNMP_DEBUG, ("SNMP get-bulk request\n")); + + /* process non repeaters and first repetition */ + while (request->error_status == SNMP_ERR_NOERROR) { + if (non_repeaters == 0) { + repetition_offset = request->outbound_pbuf_stream.offset; + + if (repetitions == 0) { + /* do not resolve repeaters when repetitions is set to 0 */ + break; + } + repetitions--; + } + + err = snmp_vb_enumerator_get_next(&request->inbound_varbind_enumerator, &vb); + if (err == SNMP_VB_ENUMERATOR_ERR_EOVB) { + /* no more varbinds in request */ + break; + } else if (err == SNMP_VB_ENUMERATOR_ERR_ASN1ERROR) { + /* malformed ASN.1, don't answer */ + return ERR_ARG; + } else if ((err != SNMP_VB_ENUMERATOR_ERR_OK) || (vb.type != SNMP_ASN1_TYPE_NULL) || (vb.value_len != 0)) { + request->error_status = SNMP_ERR_GENERROR; + } else { + snmp_process_varbind(request, &vb, 1); + non_repeaters--; + } + } + + /* process repetitions > 1 */ + while ((request->error_status == SNMP_ERR_NOERROR) && (repetitions > 0) && (request->outbound_pbuf_stream.offset != repetition_offset)) { + + u8_t all_endofmibview = 1; + + snmp_vb_enumerator_init(&repetition_varbind_enumerator, request->outbound_pbuf, repetition_offset, request->outbound_pbuf_stream.offset - repetition_offset); + repetition_offset = request->outbound_pbuf_stream.offset; /* for next loop */ + + while (request->error_status == SNMP_ERR_NOERROR) { + vb.value = NULL; /* do NOT decode value (we enumerate outbound buffer here, so all varbinds have values assigned) */ + err = snmp_vb_enumerator_get_next(&repetition_varbind_enumerator, &vb); + if (err == SNMP_VB_ENUMERATOR_ERR_OK) { + vb.value = request->value_buffer; + snmp_process_varbind(request, &vb, 1); + + if (request->error_status != SNMP_ERR_NOERROR) { + /* already set correct error-index (here it cannot be taken from inbound varbind enumerator) */ + request->error_index = request->non_repeaters + repetition_varbind_enumerator.varbind_count; + } else if (vb.type != (SNMP_ASN1_CONTENTTYPE_PRIMITIVE | SNMP_ASN1_CLASS_CONTEXT | SNMP_ASN1_CONTEXT_VARBIND_END_OF_MIB_VIEW)) { + all_endofmibview = 0; + } + } else if (err == SNMP_VB_ENUMERATOR_ERR_EOVB) { + /* no more varbinds in request */ + break; + } else { + LWIP_DEBUGF(SNMP_DEBUG, ("Very strange, we cannot parse the varbind output that we created just before!")); + request->error_status = SNMP_ERR_GENERROR; + request->error_index = request->non_repeaters + repetition_varbind_enumerator.varbind_count; + } + } + + if ((request->error_status == SNMP_ERR_NOERROR) && all_endofmibview) { + /* stop when all varbinds in a loop return EndOfMibView */ + break; + } + + repetitions--; + } + + if (request->error_status == SNMP_ERR_TOOBIG) { + /* for GetBulk it is ok, if not all requested variables fit into the response -> just return the varbinds added so far */ + request->error_status = SNMP_ERR_NOERROR; + } + + return ERR_OK; +} + +/** + * Service an internal or external event for SNMP SET. + * + * @param request points to the associated message process state + */ +static err_t +snmp_process_set_request(struct snmp_request *request) +{ + snmp_vb_enumerator_err_t err; + struct snmp_varbind vb; + vb.value = request->value_buffer; + + LWIP_DEBUGF(SNMP_DEBUG, ("SNMP set request\n")); + + /* perform set test on all objects */ + while (request->error_status == SNMP_ERR_NOERROR) { + err = snmp_vb_enumerator_get_next(&request->inbound_varbind_enumerator, &vb); + if (err == SNMP_VB_ENUMERATOR_ERR_OK) { + struct snmp_node_instance node_instance; + memset(&node_instance, 0, sizeof(node_instance)); + + request->error_status = snmp_get_node_instance_from_oid(vb.oid.id, vb.oid.len, &node_instance); + if (request->error_status == SNMP_ERR_NOERROR) { + if (node_instance.asn1_type != vb.type) { + request->error_status = SNMP_ERR_WRONGTYPE; + } else if (((node_instance.access & SNMP_NODE_INSTANCE_ACCESS_WRITE) != SNMP_NODE_INSTANCE_ACCESS_WRITE) || (node_instance.set_value == NULL)) { + request->error_status = SNMP_ERR_NOTWRITABLE; + } else { + if (node_instance.set_test != NULL) { + request->error_status = node_instance.set_test(&node_instance, vb.value_len, vb.value); + } + } + + if (node_instance.release_instance != NULL) { + node_instance.release_instance(&node_instance); + } + } + } else if (err == SNMP_VB_ENUMERATOR_ERR_EOVB) { + /* no more varbinds in request */ + break; + } else if (err == SNMP_VB_ENUMERATOR_ERR_INVALIDLENGTH) { + request->error_status = SNMP_ERR_WRONGLENGTH; + } else if (err == SNMP_VB_ENUMERATOR_ERR_ASN1ERROR) { + /* malformed ASN.1, don't answer */ + return ERR_ARG; + } else { + request->error_status = SNMP_ERR_GENERROR; + } + } + + /* perform real set operation on all objects */ + if (request->error_status == SNMP_ERR_NOERROR) { + snmp_vb_enumerator_init(&request->inbound_varbind_enumerator, request->inbound_pbuf, request->inbound_varbind_offset, request->inbound_varbind_len); + while (request->error_status == SNMP_ERR_NOERROR) { + err = snmp_vb_enumerator_get_next(&request->inbound_varbind_enumerator, &vb); + if (err == SNMP_VB_ENUMERATOR_ERR_OK) { + struct snmp_node_instance node_instance; + memset(&node_instance, 0, sizeof(node_instance)); + request->error_status = snmp_get_node_instance_from_oid(vb.oid.id, vb.oid.len, &node_instance); + if (request->error_status == SNMP_ERR_NOERROR) { + if (node_instance.set_value(&node_instance, vb.value_len, vb.value) != SNMP_ERR_NOERROR) { + if (request->inbound_varbind_enumerator.varbind_count == 1) { + request->error_status = SNMP_ERR_COMMITFAILED; + } else { + /* we cannot undo the set operations done so far */ + request->error_status = SNMP_ERR_UNDOFAILED; + } + } + + if (node_instance.release_instance != NULL) { + node_instance.release_instance(&node_instance); + } + } + } else if (err == SNMP_VB_ENUMERATOR_ERR_EOVB) { + /* no more varbinds in request */ + break; + } else { + /* first time enumerating varbinds work but second time not, although nothing should have changed in between ??? */ + request->error_status = SNMP_ERR_GENERROR; + } + } + } + + return ERR_OK; +} + +#define PARSE_EXEC(code, retValue) \ + if ((code) != ERR_OK) { \ + LWIP_DEBUGF(SNMP_DEBUG, ("Malformed ASN.1 detected.\n")); \ + snmp_stats.inasnparseerrs++; \ + return retValue; \ + } + +#define PARSE_ASSERT(cond, retValue) \ + if (!(cond)) { \ + LWIP_DEBUGF(SNMP_DEBUG, ("SNMP parse assertion failed!: " # cond)); \ + snmp_stats.inasnparseerrs++; \ + return retValue; \ + } + +#define BUILD_EXEC(code, retValue) \ + if ((code) != ERR_OK) { \ + LWIP_DEBUGF(SNMP_DEBUG, ("SNMP error during creation of outbound frame!: " # code)); \ + return retValue; \ + } + +#define IF_PARSE_EXEC(code) PARSE_EXEC(code, ERR_ARG) +#define IF_PARSE_ASSERT(code) PARSE_ASSERT(code, ERR_ARG) + +/** + * Checks and decodes incoming SNMP message header, logs header errors. + * + * @param request points to the current message request state return + * @return + * - ERR_OK SNMP header is sane and accepted + * - ERR_VAL SNMP header is either malformed or rejected + */ +static err_t +snmp_parse_inbound_frame(struct snmp_request *request) +{ + struct snmp_pbuf_stream pbuf_stream; + struct snmp_asn1_tlv tlv; + s32_t parent_tlv_value_len; + s32_t s32_value; + err_t err; + + IF_PARSE_EXEC(snmp_pbuf_stream_init(&pbuf_stream, request->inbound_pbuf, 0, request->inbound_pbuf->tot_len)); + + /* decode main container consisting of version, community and PDU */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT((tlv.type == SNMP_ASN1_TYPE_SEQUENCE) && (tlv.value_len == pbuf_stream.length)); + parent_tlv_value_len = tlv.value_len; + + /* decode version */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_INTEGER); + parent_tlv_value_len -= SNMP_ASN1_TLV_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + + IF_PARSE_EXEC(snmp_asn1_dec_s32t(&pbuf_stream, tlv.value_len, &s32_value)); + if ((s32_value != SNMP_VERSION_1) && + (s32_value != SNMP_VERSION_2c) +#if LWIP_SNMP_V3 + && (s32_value != SNMP_VERSION_3) +#endif + ) + { + /* unsupported SNMP version */ + snmp_stats.inbadversions++; + return ERR_ARG; + } + request->version = (u8_t)s32_value; + +#if LWIP_SNMP_V3 + if (request->version == SNMP_VERSION_3) { + u16_t u16_value; + u16_t inbound_msgAuthenticationParameters_offset; + + /* SNMPv3 doesn't use communities */ + /* @todo: Differentiate read/write access */ + strcpy((char*)request->community, snmp_community); + request->community_strlen = (u16_t)strlen(snmp_community); + + /* RFC3414 globalData */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_SEQUENCE); + parent_tlv_value_len -= SNMP_ASN1_TLV_HDR_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + + /* decode msgID */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_INTEGER); + parent_tlv_value_len -= SNMP_ASN1_TLV_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + + IF_PARSE_EXEC(snmp_asn1_dec_s32t(&pbuf_stream, tlv.value_len, &s32_value)); + request->msg_id = s32_value; + + /* decode msgMaxSize */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_INTEGER); + parent_tlv_value_len -= SNMP_ASN1_TLV_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + + IF_PARSE_EXEC(snmp_asn1_dec_s32t(&pbuf_stream, tlv.value_len, &s32_value)); + request->msg_max_size = s32_value; + + /* decode msgFlags */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_OCTET_STRING); + parent_tlv_value_len -= SNMP_ASN1_TLV_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + + IF_PARSE_EXEC(snmp_asn1_dec_s32t(&pbuf_stream, tlv.value_len, &s32_value)); + request->msg_flags = (u8_t)s32_value; + + /* decode msgSecurityModel */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_INTEGER); + parent_tlv_value_len -= SNMP_ASN1_TLV_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + + IF_PARSE_EXEC(snmp_asn1_dec_s32t(&pbuf_stream, tlv.value_len, &s32_value)); + request->msg_security_model = s32_value; + + /* RFC3414 msgSecurityParameters + * The User-based Security Model defines the contents of the OCTET + * STRING as a SEQUENCE. + * + * We skip the protective dummy OCTET STRING header + * to access the SEQUENCE header. + */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_OCTET_STRING); + parent_tlv_value_len -= SNMP_ASN1_TLV_HDR_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + + /* msgSecurityParameters SEQUENCE header */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_SEQUENCE); + parent_tlv_value_len -= SNMP_ASN1_TLV_HDR_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + + /* decode msgAuthoritativeEngineID */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_OCTET_STRING); + parent_tlv_value_len -= SNMP_ASN1_TLV_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + + IF_PARSE_EXEC(snmp_asn1_dec_raw(&pbuf_stream, tlv.value_len, request->msg_authoritative_engine_id, + &u16_value, SNMP_V3_MAX_ENGINE_ID_LENGTH)); + request->msg_authoritative_engine_id_len = (u8_t)u16_value; + + /* msgAuthoritativeEngineBoots */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_INTEGER); + parent_tlv_value_len -= SNMP_ASN1_TLV_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + IF_PARSE_EXEC(snmp_asn1_dec_s32t(&pbuf_stream, tlv.value_len, &request->msg_authoritative_engine_boots)); + + /* msgAuthoritativeEngineTime */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_INTEGER); + parent_tlv_value_len -= SNMP_ASN1_TLV_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + IF_PARSE_EXEC(snmp_asn1_dec_s32t(&pbuf_stream, tlv.value_len, &request->msg_authoritative_engine_time)); + /* @todo: Implement time window checking */ + + /* msgUserName */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_OCTET_STRING); + parent_tlv_value_len -= SNMP_ASN1_TLV_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + + IF_PARSE_EXEC(snmp_asn1_dec_raw(&pbuf_stream, tlv.value_len, request->msg_user_name, + &u16_value, SNMP_V3_MAX_USER_LENGTH)); + request->msg_user_name_len = (u8_t)u16_value; + /* @todo: Implement unknown user error response */ + IF_PARSE_EXEC(snmpv3_get_user((char*)request->msg_user_name, NULL, NULL, NULL, NULL)); + + /* msgAuthenticationParameters */ + memset(request->msg_authentication_parameters, 0, SNMP_V3_MAX_AUTH_PARAM_LENGTH); + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_OCTET_STRING); + parent_tlv_value_len -= SNMP_ASN1_TLV_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + /* Remember position */ + inbound_msgAuthenticationParameters_offset = pbuf_stream.offset; + LWIP_UNUSED_ARG(inbound_msgAuthenticationParameters_offset); + /* Read auth parameters */ + IF_PARSE_ASSERT(tlv.value_len <= SNMP_V3_MAX_AUTH_PARAM_LENGTH); + IF_PARSE_EXEC(snmp_asn1_dec_raw(&pbuf_stream, tlv.value_len, request->msg_authentication_parameters, + &u16_value, tlv.value_len)); + +#if LWIP_SNMP_V3_CRYPTO + if (request->msg_flags & SNMP_V3_AUTH_FLAG) { + const u8_t zero_arr[SNMP_V3_MAX_AUTH_PARAM_LENGTH] = { 0 }; + u8_t key[20]; + u8_t algo; + u8_t hmac[LWIP_MAX(SNMP_V3_SHA_LEN, SNMP_V3_MD5_LEN)]; + struct snmp_pbuf_stream auth_stream; + + /* Rewind stream */ + IF_PARSE_EXEC(snmp_pbuf_stream_init(&pbuf_stream, request->inbound_pbuf, 0, request->inbound_pbuf->tot_len)); + IF_PARSE_EXEC(snmp_pbuf_stream_seek_abs(&pbuf_stream, inbound_msgAuthenticationParameters_offset)); + /* Set auth parameters to zero for verification */ + IF_PARSE_EXEC(snmp_asn1_enc_raw(&pbuf_stream, zero_arr, tlv.value_len)); + + /* Verify authentication */ + IF_PARSE_EXEC(snmp_pbuf_stream_init(&auth_stream, request->inbound_pbuf, 0, request->inbound_pbuf->tot_len)); + + IF_PARSE_EXEC(snmpv3_get_user((char*)request->msg_user_name, &algo, key, NULL, NULL)); + IF_PARSE_EXEC(snmpv3_auth(&auth_stream, request->inbound_pbuf->tot_len, key, algo, hmac)); + /* @todo: Implement error response */ + IF_PARSE_EXEC(memcmp(request->msg_authentication_parameters, hmac, SNMP_V3_MAX_AUTH_PARAM_LENGTH)); + } +#else + /* Ungraceful exit if we encounter cryptography and don't support it. + * @todo: Implement error response + */ + IF_PARSE_ASSERT(!(request->msg_flags & (SNMP_V3_AUTH_FLAG | SNMP_V3_PRIV_FLAG))); +#endif + + /* msgPrivacyParameters */ + memset(request->msg_privacy_parameters, 0, SNMP_V3_MAX_PRIV_PARAM_LENGTH); + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_OCTET_STRING); + parent_tlv_value_len -= SNMP_ASN1_TLV_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + + IF_PARSE_EXEC(snmp_asn1_dec_raw(&pbuf_stream, tlv.value_len, request->msg_privacy_parameters, + &u16_value, SNMP_V3_MAX_PRIV_PARAM_LENGTH)); + +#if LWIP_SNMP_V3_CRYPTO + /* Decrypt message */ + if (request->msg_flags & SNMP_V3_PRIV_FLAG) { + u8_t key[20]; + u8_t algo; + + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_OCTET_STRING); + parent_tlv_value_len -= SNMP_ASN1_TLV_HDR_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + + IF_PARSE_EXEC(snmpv3_get_user((char*)request->msg_user_name, NULL, NULL, &algo, key)); + IF_PARSE_EXEC(snmpv3_crypt(&pbuf_stream, tlv.value_len, key, + request->msg_privacy_parameters, request->msg_authoritative_engine_boots, + request->msg_authoritative_engine_time, algo, SNMP_V3_PRIV_MODE_DECRYPT)); + } +#endif + + /* Scoped PDU + * Encryption context + */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_SEQUENCE); + parent_tlv_value_len -= SNMP_ASN1_TLV_HDR_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + + /* contextEngineID */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_OCTET_STRING); + parent_tlv_value_len -= SNMP_ASN1_TLV_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + + IF_PARSE_EXEC(snmp_asn1_dec_raw(&pbuf_stream, tlv.value_len, request->context_engine_id, + &u16_value, SNMP_V3_MAX_ENGINE_ID_LENGTH)); + request->context_engine_id_len = (u8_t)u16_value; + + /* contextName */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_OCTET_STRING); + parent_tlv_value_len -= SNMP_ASN1_TLV_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + + IF_PARSE_EXEC(snmp_asn1_dec_raw(&pbuf_stream, tlv.value_len, request->context_name, + &u16_value, SNMP_V3_MAX_ENGINE_ID_LENGTH)); + request->context_name_len = (u8_t)u16_value; + } else +#endif + { + /* decode community */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_OCTET_STRING); + parent_tlv_value_len -= SNMP_ASN1_TLV_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + + err = snmp_asn1_dec_raw(&pbuf_stream, tlv.value_len, request->community, &request->community_strlen, SNMP_MAX_COMMUNITY_STR_LEN); + if (err == ERR_MEM) { + /* community string does not fit in our buffer -> its too long -> its invalid */ + request->community_strlen = 0; + snmp_pbuf_stream_seek(&pbuf_stream, tlv.value_len); + } else { + IF_PARSE_ASSERT(err == ERR_OK); + } + /* add zero terminator */ + request->community[request->community_strlen] = 0; + } + + /* decode PDU type (next container level) */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.value_len <= pbuf_stream.length); + request->inbound_padding_len = pbuf_stream.length - tlv.value_len; + parent_tlv_value_len = tlv.value_len; + + /* validate PDU type */ + switch(tlv.type) { + case (SNMP_ASN1_CLASS_CONTEXT | SNMP_ASN1_CONTENTTYPE_CONSTRUCTED | SNMP_ASN1_CONTEXT_PDU_GET_REQ): + /* GetRequest PDU */ + snmp_stats.ingetrequests++; + break; + case (SNMP_ASN1_CLASS_CONTEXT | SNMP_ASN1_CONTENTTYPE_CONSTRUCTED | SNMP_ASN1_CONTEXT_PDU_GET_NEXT_REQ): + /* GetNextRequest PDU */ + snmp_stats.ingetnexts++; + break; + case (SNMP_ASN1_CLASS_CONTEXT | SNMP_ASN1_CONTENTTYPE_CONSTRUCTED | SNMP_ASN1_CONTEXT_PDU_GET_BULK_REQ): + /* GetBulkRequest PDU */ + if (request->version < SNMP_VERSION_2c) { + /* RFC2089: invalid, drop packet */ + return ERR_ARG; + } + break; + case (SNMP_ASN1_CLASS_CONTEXT | SNMP_ASN1_CONTENTTYPE_CONSTRUCTED | SNMP_ASN1_CONTEXT_PDU_SET_REQ): + /* SetRequest PDU */ + snmp_stats.insetrequests++; + break; + default: + /* unsupported input PDU for this agent (no parse error) */ + LWIP_DEBUGF(SNMP_DEBUG, ("Unknown/Invalid SNMP PDU type received: %d", tlv.type)); \ + return ERR_ARG; + break; + } + request->request_type = tlv.type & SNMP_ASN1_DATATYPE_MASK; + + /* validate community (do this after decoding PDU type because we don't want to increase 'inbadcommunitynames' for wrong frame types */ + if (request->community_strlen == 0) { + /* community string was too long or really empty*/ + snmp_stats.inbadcommunitynames++; + snmp_authfail_trap(); + return ERR_ARG; + } else if (request->request_type == SNMP_ASN1_CONTEXT_PDU_SET_REQ) { + if (snmp_community_write[0] == 0) { + /* our write community is empty, that means all our objects are readonly */ + request->error_status = SNMP_ERR_NOTWRITABLE; + request->error_index = 1; + } else if (strncmp(snmp_community_write, (const char*)request->community, SNMP_MAX_COMMUNITY_STR_LEN) != 0) { + /* community name does not match */ + snmp_stats.inbadcommunitynames++; + snmp_authfail_trap(); + return ERR_ARG; + } + } else { + if (strncmp(snmp_community, (const char*)request->community, SNMP_MAX_COMMUNITY_STR_LEN) != 0) { + /* community name does not match */ + snmp_stats.inbadcommunitynames++; + snmp_authfail_trap(); + return ERR_ARG; + } + } + + /* decode request ID */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_INTEGER); + parent_tlv_value_len -= SNMP_ASN1_TLV_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + + IF_PARSE_EXEC(snmp_asn1_dec_s32t(&pbuf_stream, tlv.value_len, &request->request_id)); + + /* decode error status / non-repeaters */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_INTEGER); + parent_tlv_value_len -= SNMP_ASN1_TLV_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + + if (request->request_type == SNMP_ASN1_CONTEXT_PDU_GET_BULK_REQ) { + IF_PARSE_EXEC(snmp_asn1_dec_s32t(&pbuf_stream, tlv.value_len, &request->non_repeaters)); + if (request->non_repeaters < 0) { + /* RFC 1905, 4.2.3 */ + request->non_repeaters = 0; + } + } else { + /* only check valid value, don't touch 'request->error_status', maybe a response error status was already set to above; */ + IF_PARSE_EXEC(snmp_asn1_dec_s32t(&pbuf_stream, tlv.value_len, &s32_value)); + IF_PARSE_ASSERT(s32_value == SNMP_ERR_NOERROR); + } + + /* decode error index / max-repetitions */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT(tlv.type == SNMP_ASN1_TYPE_INTEGER); + parent_tlv_value_len -= SNMP_ASN1_TLV_LENGTH(tlv); + IF_PARSE_ASSERT(parent_tlv_value_len > 0); + + if (request->request_type == SNMP_ASN1_CONTEXT_PDU_GET_BULK_REQ) { + IF_PARSE_EXEC(snmp_asn1_dec_s32t(&pbuf_stream, tlv.value_len, &request->max_repetitions)); + if (request->max_repetitions < 0) { + /* RFC 1905, 4.2.3 */ + request->max_repetitions = 0; + } + } else { + IF_PARSE_EXEC(snmp_asn1_dec_s32t(&pbuf_stream, tlv.value_len, &request->error_index)); + IF_PARSE_ASSERT(s32_value == 0); + } + + /* decode varbind-list type (next container level) */ + IF_PARSE_EXEC(snmp_asn1_dec_tlv(&pbuf_stream, &tlv)); + IF_PARSE_ASSERT((tlv.type == SNMP_ASN1_TYPE_SEQUENCE) && (tlv.value_len <= pbuf_stream.length)); + + request->inbound_varbind_offset = pbuf_stream.offset; + request->inbound_varbind_len = pbuf_stream.length - request->inbound_padding_len; + snmp_vb_enumerator_init(&(request->inbound_varbind_enumerator), request->inbound_pbuf, request->inbound_varbind_offset, request->inbound_varbind_len); + + return ERR_OK; +} + +#define OF_BUILD_EXEC(code) BUILD_EXEC(code, ERR_ARG) + +static err_t +snmp_prepare_outbound_frame(struct snmp_request *request) +{ + struct snmp_asn1_tlv tlv; + struct snmp_pbuf_stream* pbuf_stream = &(request->outbound_pbuf_stream); + + /* try allocating pbuf(s) for maximum response size */ + request->outbound_pbuf = pbuf_alloc(PBUF_TRANSPORT, 1472, PBUF_RAM); + if (request->outbound_pbuf == NULL) { + return ERR_MEM; + } + + snmp_pbuf_stream_init(pbuf_stream, request->outbound_pbuf, 0, request->outbound_pbuf->tot_len); + + /* 'Message' sequence */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_SEQUENCE, 3, 0); + OF_BUILD_EXEC( snmp_ans1_enc_tlv(pbuf_stream, &tlv) ); + + /* version */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_INTEGER, 0, 0); + snmp_asn1_enc_s32t_cnt(request->version, &tlv.value_len); + OF_BUILD_EXEC( snmp_ans1_enc_tlv(pbuf_stream, &tlv) ); + OF_BUILD_EXEC( snmp_asn1_enc_s32t(pbuf_stream, tlv.value_len, request->version) ); + +#if LWIP_SNMP_V3 + if (request->version < SNMP_VERSION_3) { +#endif + /* community */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_OCTET_STRING, 0, request->community_strlen); + OF_BUILD_EXEC( snmp_ans1_enc_tlv(pbuf_stream, &tlv) ); + OF_BUILD_EXEC( snmp_asn1_enc_raw(pbuf_stream, request->community, request->community_strlen) ); +#if LWIP_SNMP_V3 + } else { + const char* id; + + /* globalData */ + request->outbound_msg_global_data_offset = pbuf_stream->offset; + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_SEQUENCE, 1, 0); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv)); + + /* msgID */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_INTEGER, 0, 1); + snmp_asn1_enc_s32t_cnt(request->msg_id, &tlv.value_len); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv)); + OF_BUILD_EXEC(snmp_asn1_enc_s32t(pbuf_stream, tlv.value_len, request->msg_id)); + + /* msgMaxSize */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_INTEGER, 0, 1); + snmp_asn1_enc_s32t_cnt(request->msg_max_size, &tlv.value_len); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv)); + OF_BUILD_EXEC(snmp_asn1_enc_s32t(pbuf_stream, tlv.value_len, request->msg_max_size)); + + /* msgFlags */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_OCTET_STRING, 0, 1); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv)); + OF_BUILD_EXEC(snmp_asn1_enc_raw(pbuf_stream, &request->msg_flags, 1)); + + /* msgSecurityModel */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_INTEGER, 0, 1); + snmp_asn1_enc_s32t_cnt(request->msg_security_model, &tlv.value_len); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv)); + OF_BUILD_EXEC(snmp_asn1_enc_s32t(pbuf_stream, tlv.value_len, request->msg_security_model)); + + /* end of msgGlobalData */ + request->outbound_msg_global_data_end = pbuf_stream->offset; + + /* msgSecurityParameters */ + request->outbound_msg_security_parameters_str_offset = pbuf_stream->offset; + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_OCTET_STRING, 1, 0); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv)); + + request->outbound_msg_security_parameters_seq_offset = pbuf_stream->offset; + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_SEQUENCE, 1, 0); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv)); + + /* msgAuthoritativeEngineID */ + snmpv3_get_engine_id(&id, &request->msg_authoritative_engine_id_len); + MEMCPY(request->msg_authoritative_engine_id, id, request->msg_authoritative_engine_id_len); + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_OCTET_STRING, 0, request->msg_authoritative_engine_id_len); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv)); + OF_BUILD_EXEC(snmp_asn1_enc_raw(pbuf_stream, request->msg_authoritative_engine_id, request->msg_authoritative_engine_id_len)); + + request->msg_authoritative_engine_time = snmpv3_get_engine_time(); + request->msg_authoritative_engine_boots = snmpv3_get_engine_boots(); + + /* msgAuthoritativeEngineBoots */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_INTEGER, 0, 0); + snmp_asn1_enc_s32t_cnt(request->msg_authoritative_engine_boots, &tlv.value_len); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv)); + OF_BUILD_EXEC(snmp_asn1_enc_s32t(pbuf_stream, tlv.value_len, request->msg_authoritative_engine_boots)); + + /* msgAuthoritativeEngineTime */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_INTEGER, 0, 0); + snmp_asn1_enc_s32t_cnt(request->msg_authoritative_engine_time, &tlv.value_len); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv)); + OF_BUILD_EXEC(snmp_asn1_enc_s32t(pbuf_stream, tlv.value_len, request->msg_authoritative_engine_time)); + + /* msgUserName */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_OCTET_STRING, 0, request->msg_user_name_len); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv)); + OF_BUILD_EXEC(snmp_asn1_enc_raw(pbuf_stream, request->msg_user_name, request->msg_user_name_len)); + +#if LWIP_SNMP_V3_CRYPTO + /* msgAuthenticationParameters */ + if (request->msg_flags & SNMP_V3_AUTH_FLAG) { + memset(request->msg_authentication_parameters, 0, SNMP_V3_MAX_AUTH_PARAM_LENGTH); + request->outbound_msg_authentication_parameters_offset = pbuf_stream->offset; + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_OCTET_STRING, 1, SNMP_V3_MAX_AUTH_PARAM_LENGTH); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv)); + OF_BUILD_EXEC(snmp_asn1_enc_raw(pbuf_stream, request->msg_authentication_parameters, SNMP_V3_MAX_AUTH_PARAM_LENGTH)); + } else +#endif + { + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_OCTET_STRING, 0, 0); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv)); + } + +#if LWIP_SNMP_V3_CRYPTO + /* msgPrivacyParameters */ + if (request->msg_flags & SNMP_V3_PRIV_FLAG) { + snmpv3_build_priv_param(request->msg_privacy_parameters); + + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_OCTET_STRING, 0, SNMP_V3_MAX_PRIV_PARAM_LENGTH); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv)); + OF_BUILD_EXEC(snmp_asn1_enc_raw(pbuf_stream, request->msg_privacy_parameters, SNMP_V3_MAX_PRIV_PARAM_LENGTH)); + } else +#endif + { + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_OCTET_STRING, 0, 0); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv) ); + } + + /* End of msgSecurityParameters, so we can calculate the length of this sequence later */ + request->outbound_msg_security_parameters_end = pbuf_stream->offset; + +#if LWIP_SNMP_V3_CRYPTO + /* For encryption we have to encapsulate the payload in an octet string */ + if (request->msg_flags & SNMP_V3_PRIV_FLAG) { + request->outbound_scoped_pdu_string_offset = pbuf_stream->offset; + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_OCTET_STRING, 3, 0); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv)); + } +#endif + /* Scoped PDU + * Encryption context + */ + request->outbound_scoped_pdu_seq_offset = pbuf_stream->offset; + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_SEQUENCE, 3, 0); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv)); + + /* contextEngineID */ + snmpv3_get_engine_id(&id, &request->context_engine_id_len); + MEMCPY(request->context_engine_id, id, request->context_engine_id_len); + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_OCTET_STRING, 0, request->context_engine_id_len); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv)); + OF_BUILD_EXEC(snmp_asn1_enc_raw(pbuf_stream, request->context_engine_id, request->context_engine_id_len)); + + /* contextName */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_OCTET_STRING, 0, request->context_name_len); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv)); + OF_BUILD_EXEC(snmp_asn1_enc_raw(pbuf_stream, request->context_name, request->context_name_len)); + } +#endif + + /* 'PDU' sequence */ + request->outbound_pdu_offset = pbuf_stream->offset; + SNMP_ASN1_SET_TLV_PARAMS(tlv, (SNMP_ASN1_CLASS_CONTEXT | SNMP_ASN1_CONTENTTYPE_CONSTRUCTED | SNMP_ASN1_CONTEXT_PDU_GET_RESP), 3, 0); + OF_BUILD_EXEC( snmp_ans1_enc_tlv(pbuf_stream, &tlv) ); + + /* request ID */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_INTEGER, 0, 0); + snmp_asn1_enc_s32t_cnt(request->request_id, &tlv.value_len); + OF_BUILD_EXEC( snmp_ans1_enc_tlv(pbuf_stream, &tlv) ); + OF_BUILD_EXEC( snmp_asn1_enc_s32t(pbuf_stream, tlv.value_len, request->request_id) ); + + /* error status */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_INTEGER, 0, 1); + OF_BUILD_EXEC( snmp_ans1_enc_tlv(pbuf_stream, &tlv) ); + request->outbound_error_status_offset = pbuf_stream->offset; + OF_BUILD_EXEC( snmp_pbuf_stream_write(pbuf_stream, 0) ); + + /* error index */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_INTEGER, 0, 1); + OF_BUILD_EXEC( snmp_ans1_enc_tlv(pbuf_stream, &tlv) ); + request->outbound_error_index_offset = pbuf_stream->offset; + OF_BUILD_EXEC( snmp_pbuf_stream_write(pbuf_stream, 0) ); + + /* 'VarBindList' sequence */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_SEQUENCE, 3, 0); + OF_BUILD_EXEC( snmp_ans1_enc_tlv(pbuf_stream, &tlv) ); + + request->outbound_varbind_offset = pbuf_stream->offset; + + return ERR_OK; +} + +/** Calculate the length of a varbind list */ +err_t +snmp_varbind_length(struct snmp_varbind *varbind, struct snmp_varbind_len *len) +{ + /* calculate required lengths */ + snmp_asn1_enc_oid_cnt(varbind->oid.id, varbind->oid.len, &len->oid_value_len); + snmp_asn1_enc_length_cnt(len->oid_value_len, &len->oid_len_len); + + if (varbind->value_len == 0) { + len->value_value_len = 0; + } else if (varbind->value_len & SNMP_GET_VALUE_RAW_DATA) { + len->value_value_len = varbind->value_len & (~SNMP_GET_VALUE_RAW_DATA); + } else { + switch (varbind->type) { + case SNMP_ASN1_TYPE_INTEGER: + if (varbind->value_len != sizeof (s32_t)) { + return ERR_VAL; + } + snmp_asn1_enc_s32t_cnt(*((s32_t*) varbind->value), &len->value_value_len); + break; + case SNMP_ASN1_TYPE_COUNTER: + case SNMP_ASN1_TYPE_GAUGE: + case SNMP_ASN1_TYPE_TIMETICKS: + if (varbind->value_len != sizeof (u32_t)) { + return ERR_VAL; + } + snmp_asn1_enc_u32t_cnt(*((u32_t*) varbind->value), &len->value_value_len); + break; + case SNMP_ASN1_TYPE_OCTET_STRING: + case SNMP_ASN1_TYPE_IPADDR: + case SNMP_ASN1_TYPE_OPAQUE: + len->value_value_len = varbind->value_len; + break; + case SNMP_ASN1_TYPE_NULL: + if (varbind->value_len != 0) { + return ERR_VAL; + } + len->value_value_len = 0; + break; + case SNMP_ASN1_TYPE_OBJECT_ID: + if ((varbind->value_len & 0x03) != 0) { + return ERR_VAL; + } + snmp_asn1_enc_oid_cnt((u32_t*) varbind->value, varbind->value_len >> 2, &len->value_value_len); + break; + case SNMP_ASN1_TYPE_COUNTER64: + if (varbind->value_len != (2 * sizeof (u32_t))) { + return ERR_VAL; + } + snmp_asn1_enc_u64t_cnt((u32_t*) varbind->value, &len->value_value_len); + break; + default: + /* unsupported type */ + return ERR_VAL; + } + } + snmp_asn1_enc_length_cnt(len->value_value_len, &len->value_len_len); + + len->vb_value_len = 1 + len->oid_len_len + len->oid_value_len + 1 + len->value_len_len + len->value_value_len; + snmp_asn1_enc_length_cnt(len->vb_value_len, &len->vb_len_len); + + return ERR_OK; +} + +#define OVB_BUILD_EXEC(code) BUILD_EXEC(code, ERR_ARG) + +err_t +snmp_append_outbound_varbind(struct snmp_pbuf_stream *pbuf_stream, struct snmp_varbind* varbind) +{ + struct snmp_asn1_tlv tlv; + struct snmp_varbind_len len; + err_t err; + + err = snmp_varbind_length(varbind, &len); + + if (err != ERR_OK) { + return err; + } + + /* check length already before adding first data because in case of GetBulk, + * data added so far is returned and therefore no partial data shall be added + */ + if ((1 + len.vb_len_len + len.vb_value_len) > pbuf_stream->length) { + return ERR_BUF; + } + + /* 'VarBind' sequence */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_SEQUENCE, len.vb_len_len, len.vb_value_len); + OVB_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv)); + + /* VarBind OID */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_OBJECT_ID, len.oid_len_len, len.oid_value_len); + OVB_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv)); + OVB_BUILD_EXEC(snmp_asn1_enc_oid(pbuf_stream, varbind->oid.id, varbind->oid.len)); + + /* VarBind value */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, varbind->type, len.value_len_len, len.value_value_len); + OVB_BUILD_EXEC(snmp_ans1_enc_tlv(pbuf_stream, &tlv)); + + if (len.value_value_len > 0) { + if (varbind->value_len & SNMP_GET_VALUE_RAW_DATA) { + OVB_BUILD_EXEC(snmp_asn1_enc_raw(pbuf_stream, (u8_t*) varbind->value, len.value_value_len)); + } else { + switch (varbind->type) { + case SNMP_ASN1_TYPE_INTEGER: + OVB_BUILD_EXEC(snmp_asn1_enc_s32t(pbuf_stream, len.value_value_len, *((s32_t*) varbind->value))); + break; + case SNMP_ASN1_TYPE_COUNTER: + case SNMP_ASN1_TYPE_GAUGE: + case SNMP_ASN1_TYPE_TIMETICKS: + OVB_BUILD_EXEC(snmp_asn1_enc_u32t(pbuf_stream, len.value_value_len, *((u32_t*) varbind->value))); + break; + case SNMP_ASN1_TYPE_OCTET_STRING: + case SNMP_ASN1_TYPE_IPADDR: + case SNMP_ASN1_TYPE_OPAQUE: + OVB_BUILD_EXEC(snmp_asn1_enc_raw(pbuf_stream, (u8_t*) varbind->value, len.value_value_len)); + len.value_value_len = varbind->value_len; + break; + case SNMP_ASN1_TYPE_OBJECT_ID: + OVB_BUILD_EXEC(snmp_asn1_enc_oid(pbuf_stream, (u32_t*) varbind->value, varbind->value_len / sizeof (u32_t))); + break; + case SNMP_ASN1_TYPE_COUNTER64: + OVB_BUILD_EXEC(snmp_asn1_enc_u64t(pbuf_stream, len.value_value_len, (u32_t*) varbind->value)); + break; + default: + LWIP_ASSERT("Unknown variable type", 0); + break; + } + } + } + + return ERR_OK; +} + +static err_t +snmp_complete_outbound_frame(struct snmp_request *request) +{ + struct snmp_asn1_tlv tlv; + u16_t frame_size; + u8_t outbound_padding = 0; + + if (request->version == SNMP_VERSION_1) { + if (request->error_status != SNMP_ERR_NOERROR) { + /* map v2c error codes to v1 compliant error code (according to RFC 2089) */ + switch (request->error_status) { + /* mapping of implementation specific "virtual" error codes + * (during processing of frame we already stored them in error_status field, + * so no need to check all varbinds here for those exceptions as suggested by RFC) */ + case SNMP_ERR_NOSUCHINSTANCE: + case SNMP_ERR_NOSUCHOBJECT: + case SNMP_ERR_ENDOFMIBVIEW: + request->error_status = SNMP_ERR_NOSUCHNAME; + break; + /* mapping according to RFC */ + case SNMP_ERR_WRONGVALUE: + case SNMP_ERR_WRONGENCODING: + case SNMP_ERR_WRONGTYPE: + case SNMP_ERR_WRONGLENGTH: + case SNMP_ERR_INCONSISTENTVALUE: + request->error_status = SNMP_ERR_BADVALUE; + break; + case SNMP_ERR_NOACCESS: + case SNMP_ERR_NOTWRITABLE: + case SNMP_ERR_NOCREATION: + case SNMP_ERR_INCONSISTENTNAME: + case SNMP_ERR_AUTHORIZATIONERROR: + request->error_status = SNMP_ERR_NOSUCHNAME; + break; + case SNMP_ERR_RESOURCEUNAVAILABLE: + case SNMP_ERR_COMMITFAILED: + case SNMP_ERR_UNDOFAILED: + default: + request->error_status = SNMP_ERR_GENERROR; + break; + } + } + } else { + if (request->request_type == SNMP_ASN1_CONTEXT_PDU_SET_REQ) { + /* map error codes to according to RFC 1905 (4.2.5. The SetRequest-PDU) return 'NotWritable' for unknown OIDs) */ + switch (request->error_status) { + case SNMP_ERR_NOSUCHINSTANCE: + case SNMP_ERR_NOSUCHOBJECT: + case SNMP_ERR_ENDOFMIBVIEW: + request->error_status = SNMP_ERR_NOTWRITABLE; + break; + default: + break; + } + } + + if (request->error_status >= SNMP_VARBIND_EXCEPTION_OFFSET) { + /* should never occur because v2 frames store exceptions directly inside varbinds and not as frame error_status */ + LWIP_DEBUGF(SNMP_DEBUG, ("snmp_complete_outbound_frame() > Found v2 request with varbind exception code stored as error status!\n")); + return ERR_ARG; + } + } + + if ((request->error_status != SNMP_ERR_NOERROR) || (request->request_type == SNMP_ASN1_CONTEXT_PDU_SET_REQ)) { + /* all inbound vars are returned in response without any modification for error responses and successful set requests*/ + struct snmp_pbuf_stream inbound_stream; + OF_BUILD_EXEC( snmp_pbuf_stream_init(&inbound_stream, request->inbound_pbuf, request->inbound_varbind_offset, request->inbound_varbind_len) ); + OF_BUILD_EXEC( snmp_pbuf_stream_init(&(request->outbound_pbuf_stream), request->outbound_pbuf, request->outbound_varbind_offset, request->outbound_pbuf->tot_len - request->outbound_varbind_offset) ); + snmp_pbuf_stream_writeto(&inbound_stream, &(request->outbound_pbuf_stream), 0); + } + + frame_size = request->outbound_pbuf_stream.offset; + +#if LWIP_SNMP_V3 && LWIP_SNMP_V3_CRYPTO + /* Calculate padding for encryption */ + if (request->version == SNMP_VERSION_3 && (request->msg_flags & SNMP_V3_PRIV_FLAG)) { + u8_t i; + outbound_padding = (8 - (u8_t)((frame_size - request->outbound_scoped_pdu_seq_offset) & 0x07)) & 0x07; + for (i = 0; i < outbound_padding; i++) { + snmp_pbuf_stream_write(&request->outbound_pbuf_stream, 0); + } + } +#endif + + /* complete missing length in 'Message' sequence ; 'Message' tlv is located at the beginning (offset 0) */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_SEQUENCE, 3, frame_size + outbound_padding - 1 - 3); /* - type - length_len(fixed, see snmp_prepare_outbound_frame()) */ + OF_BUILD_EXEC( snmp_pbuf_stream_init(&(request->outbound_pbuf_stream), request->outbound_pbuf, 0, request->outbound_pbuf->tot_len) ); + OF_BUILD_EXEC( snmp_ans1_enc_tlv(&(request->outbound_pbuf_stream), &tlv) ); + +#if LWIP_SNMP_V3 + if (request->version == SNMP_VERSION_3) { + /* complete missing length in 'globalData' sequence */ + /* - type - length_len(fixed, see snmp_prepare_outbound_frame()) */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_SEQUENCE, 1, request->outbound_msg_global_data_end + - request->outbound_msg_global_data_offset - 1 - 1); + OF_BUILD_EXEC(snmp_pbuf_stream_seek_abs(&(request->outbound_pbuf_stream), request->outbound_msg_global_data_offset)); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(&(request->outbound_pbuf_stream), &tlv)); + + /* complete missing length in 'msgSecurityParameters' sequence */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_OCTET_STRING, 1, request->outbound_msg_security_parameters_end + - request->outbound_msg_security_parameters_str_offset - 1 - 1); + OF_BUILD_EXEC(snmp_pbuf_stream_seek_abs(&(request->outbound_pbuf_stream), request->outbound_msg_security_parameters_str_offset)); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(&(request->outbound_pbuf_stream), &tlv)); + + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_SEQUENCE, 1, request->outbound_msg_security_parameters_end + - request->outbound_msg_security_parameters_seq_offset - 1 - 1); + OF_BUILD_EXEC(snmp_pbuf_stream_seek_abs(&(request->outbound_pbuf_stream), request->outbound_msg_security_parameters_seq_offset)); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(&(request->outbound_pbuf_stream), &tlv)); + + /* complete missing length in scoped PDU sequence */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_SEQUENCE, 3, frame_size - request->outbound_scoped_pdu_seq_offset - 1 - 3); + OF_BUILD_EXEC(snmp_pbuf_stream_seek_abs(&(request->outbound_pbuf_stream), request->outbound_scoped_pdu_seq_offset)); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(&(request->outbound_pbuf_stream), &tlv)); + } +#endif + + /* complete missing length in 'PDU' sequence */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, (SNMP_ASN1_CLASS_CONTEXT | SNMP_ASN1_CONTENTTYPE_CONSTRUCTED | SNMP_ASN1_CONTEXT_PDU_GET_RESP), 3, + frame_size - request->outbound_pdu_offset - 1 - 3); /* - type - length_len(fixed, see snmp_prepare_outbound_frame()) */ + OF_BUILD_EXEC( snmp_pbuf_stream_seek_abs(&(request->outbound_pbuf_stream), request->outbound_pdu_offset) ); + OF_BUILD_EXEC( snmp_ans1_enc_tlv(&(request->outbound_pbuf_stream), &tlv) ); + + /* process and encode final error status */ + if (request->error_status != 0) { + u16_t len; + snmp_asn1_enc_s32t_cnt(request->error_status, &len); + if (len != 1) { + /* error, we only reserved one byte for it */ + return ERR_ARG; + } + OF_BUILD_EXEC( snmp_pbuf_stream_seek_abs(&(request->outbound_pbuf_stream), request->outbound_error_status_offset) ); + OF_BUILD_EXEC( snmp_asn1_enc_s32t(&(request->outbound_pbuf_stream), len, request->error_status) ); + + /* for compatibility to v1, log statistics; in v2 (RFC 1907) these statistics are obsoleted */ + switch (request->error_status) { + case SNMP_ERR_TOOBIG: + snmp_stats.outtoobigs++; + break; + case SNMP_ERR_NOSUCHNAME: + snmp_stats.outnosuchnames++; + break; + case SNMP_ERR_BADVALUE: + snmp_stats.outbadvalues++; + break; + case SNMP_ERR_GENERROR: + default: + snmp_stats.outgenerrs++; + break; + } + + if (request->error_status == SNMP_ERR_TOOBIG) { + request->error_index = 0; /* defined by RFC 1157 */ + } else if (request->error_index == 0) { + /* set index to varbind where error occured (if not already set before, e.g. during GetBulk processing) */ + request->error_index = request->inbound_varbind_enumerator.varbind_count; + } + } else { + if (request->request_type == SNMP_ASN1_CONTEXT_PDU_SET_REQ) { + snmp_stats.intotalsetvars += request->inbound_varbind_enumerator.varbind_count; + } else { + snmp_stats.intotalreqvars += request->inbound_varbind_enumerator.varbind_count; + } + } + + /* encode final error index*/ + if (request->error_index != 0) { + u16_t len; + snmp_asn1_enc_s32t_cnt(request->error_index, &len); + if (len != 1) { + /* error, we only reserved one byte for it */ + return ERR_VAL; + } + OF_BUILD_EXEC( snmp_pbuf_stream_seek_abs(&(request->outbound_pbuf_stream), request->outbound_error_index_offset) ); + OF_BUILD_EXEC( snmp_asn1_enc_s32t(&(request->outbound_pbuf_stream), len, request->error_index) ); + } + + /* complete missing length in 'VarBindList' sequence ; 'VarBindList' tlv is located directly before varbind offset */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_SEQUENCE, 3, frame_size - request->outbound_varbind_offset); + OF_BUILD_EXEC( snmp_pbuf_stream_seek_abs(&(request->outbound_pbuf_stream), request->outbound_varbind_offset - 1 - 3) ); /* - type - length_len(fixed, see snmp_prepare_outbound_frame()) */ + OF_BUILD_EXEC( snmp_ans1_enc_tlv(&(request->outbound_pbuf_stream), &tlv) ); + + /* Authenticate response */ +#if LWIP_SNMP_V3 && LWIP_SNMP_V3_CRYPTO + /* Encrypt response */ + if (request->version == SNMP_VERSION_3 && (request->msg_flags & SNMP_V3_PRIV_FLAG)) { + u8_t key[20]; + u8_t algo; + + /* complete missing length in PDU sequence */ + OF_BUILD_EXEC(snmp_pbuf_stream_init(&request->outbound_pbuf_stream, request->outbound_pbuf, 0, request->outbound_pbuf->tot_len)); + OF_BUILD_EXEC(snmp_pbuf_stream_seek_abs(&(request->outbound_pbuf_stream), request->outbound_scoped_pdu_string_offset)); + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_OCTET_STRING, 3, frame_size + outbound_padding + - request->outbound_scoped_pdu_string_offset - 1 - 3); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(&(request->outbound_pbuf_stream), &tlv)); + + OF_BUILD_EXEC(snmpv3_get_user((char*)request->msg_user_name, NULL, NULL, &algo, key)); + + OF_BUILD_EXEC(snmpv3_crypt(&request->outbound_pbuf_stream, tlv.value_len, key, + request->msg_privacy_parameters, request->msg_authoritative_engine_boots, + request->msg_authoritative_engine_time, algo, SNMP_V3_PRIV_MODE_ENCRYPT)); + } + + if (request->version == SNMP_VERSION_3 && (request->msg_flags & SNMP_V3_AUTH_FLAG)) { + u8_t key[20]; + u8_t algo; + u8_t hmac[20]; + + OF_BUILD_EXEC(snmpv3_get_user((char*)request->msg_user_name, &algo, key, NULL, NULL)); + OF_BUILD_EXEC(snmp_pbuf_stream_init(&(request->outbound_pbuf_stream), + request->outbound_pbuf, 0, request->outbound_pbuf->tot_len)); + OF_BUILD_EXEC(snmpv3_auth(&request->outbound_pbuf_stream, frame_size + outbound_padding, key, algo, hmac)); + + MEMCPY(request->msg_authentication_parameters, hmac, SNMP_V3_MAX_AUTH_PARAM_LENGTH); + OF_BUILD_EXEC(snmp_pbuf_stream_init(&request->outbound_pbuf_stream, + request->outbound_pbuf, 0, request->outbound_pbuf->tot_len)); + OF_BUILD_EXEC(snmp_pbuf_stream_seek_abs(&request->outbound_pbuf_stream, + request->outbound_msg_authentication_parameters_offset)); + + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_OCTET_STRING, 1, SNMP_V3_MAX_AUTH_PARAM_LENGTH); + OF_BUILD_EXEC(snmp_ans1_enc_tlv(&request->outbound_pbuf_stream, &tlv)); + OF_BUILD_EXEC(snmp_asn1_enc_raw(&request->outbound_pbuf_stream, + request->msg_authentication_parameters, SNMP_V3_MAX_AUTH_PARAM_LENGTH)); + } +#endif + + pbuf_realloc(request->outbound_pbuf, frame_size + outbound_padding); + + snmp_stats.outgetresponses++; + snmp_stats.outpkts++; + + return ERR_OK; +} + +static void +snmp_execute_write_callbacks(struct snmp_request *request) +{ + struct snmp_varbind_enumerator inbound_varbind_enumerator; + struct snmp_varbind vb; + + snmp_vb_enumerator_init(&inbound_varbind_enumerator, request->inbound_pbuf, request->inbound_varbind_offset, request->inbound_varbind_len); + vb.value = NULL; /* do NOT decode value (we enumerate outbound buffer here, so all varbinds have values assigned, which we don't need here) */ + + while (snmp_vb_enumerator_get_next(&inbound_varbind_enumerator, &vb) == SNMP_VB_ENUMERATOR_ERR_OK) { + snmp_write_callback(vb.oid.id, vb.oid.len, snmp_write_callback_arg); + } +} + + +/* ----------------------------------------------------------------------- */ +/* VarBind enumerator methods */ +/* ----------------------------------------------------------------------- */ + +void +snmp_vb_enumerator_init(struct snmp_varbind_enumerator* enumerator, struct pbuf* p, u16_t offset, u16_t length) +{ + snmp_pbuf_stream_init(&(enumerator->pbuf_stream), p, offset, length); + enumerator->varbind_count = 0; +} + +#define VB_PARSE_EXEC(code) PARSE_EXEC(code, SNMP_VB_ENUMERATOR_ERR_ASN1ERROR) +#define VB_PARSE_ASSERT(code) PARSE_ASSERT(code, SNMP_VB_ENUMERATOR_ERR_ASN1ERROR) + +snmp_vb_enumerator_err_t +snmp_vb_enumerator_get_next(struct snmp_varbind_enumerator* enumerator, struct snmp_varbind* varbind) +{ + struct snmp_asn1_tlv tlv; + u16_t varbind_len; + err_t err; + + if (enumerator->pbuf_stream.length == 0) + { + return SNMP_VB_ENUMERATOR_ERR_EOVB; + } + enumerator->varbind_count++; + + /* decode varbind itself (parent container of a varbind) */ + VB_PARSE_EXEC(snmp_asn1_dec_tlv(&(enumerator->pbuf_stream), &tlv)); + VB_PARSE_ASSERT((tlv.type == SNMP_ASN1_TYPE_SEQUENCE) && (tlv.value_len <= enumerator->pbuf_stream.length)); + varbind_len = tlv.value_len; + + /* decode varbind name (object id) */ + VB_PARSE_EXEC(snmp_asn1_dec_tlv(&(enumerator->pbuf_stream), &tlv)); + VB_PARSE_ASSERT((tlv.type == SNMP_ASN1_TYPE_OBJECT_ID) && (SNMP_ASN1_TLV_LENGTH(tlv) < varbind_len) && (tlv.value_len < enumerator->pbuf_stream.length)); + + VB_PARSE_EXEC(snmp_asn1_dec_oid(&(enumerator->pbuf_stream), tlv.value_len, varbind->oid.id, &(varbind->oid.len), SNMP_MAX_OBJ_ID_LEN)); + varbind_len -= SNMP_ASN1_TLV_LENGTH(tlv); + + /* decode varbind value (object id) */ + VB_PARSE_EXEC(snmp_asn1_dec_tlv(&(enumerator->pbuf_stream), &tlv)); + VB_PARSE_ASSERT((SNMP_ASN1_TLV_LENGTH(tlv) == varbind_len) && (tlv.value_len <= enumerator->pbuf_stream.length)); + varbind->type = tlv.type; + + /* shall the value be decoded ? */ + if (varbind->value != NULL) { + switch (varbind->type) { + case SNMP_ASN1_TYPE_INTEGER: + VB_PARSE_EXEC(snmp_asn1_dec_s32t(&(enumerator->pbuf_stream), tlv.value_len, (s32_t*)varbind->value)); + varbind->value_len = sizeof(s32_t*); + break; + case SNMP_ASN1_TYPE_COUNTER: + case SNMP_ASN1_TYPE_GAUGE: + case SNMP_ASN1_TYPE_TIMETICKS: + VB_PARSE_EXEC(snmp_asn1_dec_u32t(&(enumerator->pbuf_stream), tlv.value_len, (u32_t*)varbind->value)); + varbind->value_len = sizeof(u32_t*); + break; + case SNMP_ASN1_TYPE_OCTET_STRING: + case SNMP_ASN1_TYPE_OPAQUE: + err = snmp_asn1_dec_raw(&(enumerator->pbuf_stream), tlv.value_len, (u8_t*)varbind->value, &varbind->value_len, SNMP_MAX_VALUE_SIZE); + if (err == ERR_MEM) { + return SNMP_VB_ENUMERATOR_ERR_INVALIDLENGTH; + } + VB_PARSE_ASSERT(err == ERR_OK); + break; + case SNMP_ASN1_TYPE_NULL: + varbind->value_len = 0; + break; + case SNMP_ASN1_TYPE_OBJECT_ID: + /* misuse tlv.length_len as OID_length transporter */ + err = snmp_asn1_dec_oid(&(enumerator->pbuf_stream), tlv.value_len, (u32_t*)varbind->value, &tlv.length_len, SNMP_MAX_OBJ_ID_LEN); + if (err == ERR_MEM) { + return SNMP_VB_ENUMERATOR_ERR_INVALIDLENGTH; + } + VB_PARSE_ASSERT(err == ERR_OK); + varbind->value_len = tlv.length_len * sizeof(u32_t); + break; + case SNMP_ASN1_TYPE_IPADDR: + if (tlv.value_len == 4) { + /* must be exactly 4 octets! */ + VB_PARSE_EXEC(snmp_asn1_dec_raw(&(enumerator->pbuf_stream), tlv.value_len, (u8_t*)varbind->value, &varbind->value_len, SNMP_MAX_VALUE_SIZE)); + } else { + VB_PARSE_ASSERT(0); + } + break; + case SNMP_ASN1_TYPE_COUNTER64: + VB_PARSE_EXEC(snmp_asn1_dec_u64t(&(enumerator->pbuf_stream), tlv.value_len, (u32_t*)varbind->value)); + varbind->value_len = 2 * sizeof(u32_t*); + break; + default: + VB_PARSE_ASSERT(0); + break; + } + } else { + snmp_pbuf_stream_seek(&(enumerator->pbuf_stream), tlv.value_len); + varbind->value_len = tlv.value_len; + } + + return SNMP_VB_ENUMERATOR_ERR_OK; +} + +#endif /* LWIP_SNMP */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_msg.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_msg.h new file mode 100644 index 0000000..2d01ef3 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_msg.h @@ -0,0 +1,194 @@ +/** + * @file + * SNMP Agent message handling structures (internal API, do not use in client code). + */ + +/* + * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands. + * Copyright (c) 2016 Elias Oenal. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Christiaan Simons <christiaan.simons@axon.tv> + * Martin Hentschel <info@cl-soft.de> + * Elias Oenal <lwip@eliasoenal.com> + */ + +#ifndef LWIP_HDR_APPS_SNMP_MSG_H +#define LWIP_HDR_APPS_SNMP_MSG_H + +#include "lwip/apps/snmp_opts.h" + +#if LWIP_SNMP + +#include "lwip/apps/snmp.h" +#include "lwip/apps/snmp_core.h" +#include "snmp_pbuf_stream.h" +#include "lwip/ip_addr.h" +#include "lwip/err.h" + +#if LWIP_SNMP_V3 +#include "snmpv3_priv.h" +#endif + + +#ifdef __cplusplus +extern "C" { +#endif + +/* The listen port of the SNMP agent. Clients have to make their requests to + this port. Most standard clients won't work if you change this! */ +#ifndef SNMP_IN_PORT +#define SNMP_IN_PORT 161 +#endif +/* The remote port the SNMP agent sends traps to. Most standard trap sinks won't + work if you change this! */ +#ifndef SNMP_TRAP_PORT +#define SNMP_TRAP_PORT 162 +#endif + +/* version defines used in PDU */ +#define SNMP_VERSION_1 0 +#define SNMP_VERSION_2c 1 +#define SNMP_VERSION_3 3 + +struct snmp_varbind_enumerator +{ + struct snmp_pbuf_stream pbuf_stream; + u16_t varbind_count; +}; + +typedef enum { + SNMP_VB_ENUMERATOR_ERR_OK = 0, + SNMP_VB_ENUMERATOR_ERR_EOVB = 1, + SNMP_VB_ENUMERATOR_ERR_ASN1ERROR = 2, + SNMP_VB_ENUMERATOR_ERR_INVALIDLENGTH = 3 +} snmp_vb_enumerator_err_t; + +void snmp_vb_enumerator_init(struct snmp_varbind_enumerator* enumerator, struct pbuf* p, u16_t offset, u16_t length); +snmp_vb_enumerator_err_t snmp_vb_enumerator_get_next(struct snmp_varbind_enumerator* enumerator, struct snmp_varbind* varbind); + +struct snmp_request +{ + /* Communication handle */ + void *handle; + /* source IP address */ + const ip_addr_t *source_ip; + /* source UDP port */ + u16_t source_port; + /* incoming snmp version */ + u8_t version; + /* community name (zero terminated) */ + u8_t community[SNMP_MAX_COMMUNITY_STR_LEN + 1]; + /* community string length (exclusive zero term) */ + u16_t community_strlen; + /* request type */ + u8_t request_type; + /* request ID */ + s32_t request_id; + /* error status */ + s32_t error_status; + /* error index */ + s32_t error_index; + /* non-repeaters (getBulkRequest (SNMPv2c)) */ + s32_t non_repeaters; + /* max-repetitions (getBulkRequest (SNMPv2c)) */ + s32_t max_repetitions; + +#if LWIP_SNMP_V3 + s32_t msg_id; + s32_t msg_max_size; + u8_t msg_flags; + s32_t msg_security_model; + u8_t msg_authoritative_engine_id[SNMP_V3_MAX_ENGINE_ID_LENGTH]; + u8_t msg_authoritative_engine_id_len; + s32_t msg_authoritative_engine_boots; + s32_t msg_authoritative_engine_time; + u8_t msg_user_name[SNMP_V3_MAX_USER_LENGTH]; + u8_t msg_user_name_len; + u8_t msg_authentication_parameters[SNMP_V3_MAX_AUTH_PARAM_LENGTH]; + u8_t msg_privacy_parameters[SNMP_V3_MAX_PRIV_PARAM_LENGTH]; + u8_t context_engine_id[SNMP_V3_MAX_ENGINE_ID_LENGTH]; + u8_t context_engine_id_len; + u8_t context_name[SNMP_V3_MAX_ENGINE_ID_LENGTH]; + u8_t context_name_len; +#endif + + struct pbuf *inbound_pbuf; + struct snmp_varbind_enumerator inbound_varbind_enumerator; + u16_t inbound_varbind_offset; + u16_t inbound_varbind_len; + u16_t inbound_padding_len; + + struct pbuf *outbound_pbuf; + struct snmp_pbuf_stream outbound_pbuf_stream; + u16_t outbound_pdu_offset; + u16_t outbound_error_status_offset; + u16_t outbound_error_index_offset; + u16_t outbound_varbind_offset; +#if LWIP_SNMP_V3 + u16_t outbound_msg_global_data_offset; + u16_t outbound_msg_global_data_end; + u16_t outbound_msg_security_parameters_str_offset; + u16_t outbound_msg_security_parameters_seq_offset; + u16_t outbound_msg_security_parameters_end; + u16_t outbound_msg_authentication_parameters_offset; + u16_t outbound_scoped_pdu_seq_offset; + u16_t outbound_scoped_pdu_string_offset; +#endif + + u8_t value_buffer[SNMP_MAX_VALUE_SIZE]; +}; + +/** A helper struct keeping length information about varbinds */ +struct snmp_varbind_len +{ + u8_t vb_len_len; + u16_t vb_value_len; + u8_t oid_len_len; + u16_t oid_value_len; + u8_t value_len_len; + u16_t value_value_len; +}; + +/** Agent community string */ +extern const char *snmp_community; +/** Agent community string for write access */ +extern const char *snmp_community_write; +/** handle for sending traps */ +extern void* snmp_traps_handle; + +void snmp_receive(void *handle, struct pbuf *p, const ip_addr_t *source_ip, u16_t port); +err_t snmp_sendto(void *handle, struct pbuf *p, const ip_addr_t *dst, u16_t port); +u8_t snmp_get_local_ip_for_dst(void* handle, const ip_addr_t *dst, ip_addr_t *result); +err_t snmp_varbind_length(struct snmp_varbind *varbind, struct snmp_varbind_len *len); +err_t snmp_append_outbound_varbind(struct snmp_pbuf_stream *pbuf_stream, struct snmp_varbind* varbind); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_SNMP */ + +#endif /* LWIP_HDR_APPS_SNMP_MSG_H */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_netconn.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_netconn.c new file mode 100644 index 0000000..24c3e26 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_netconn.c @@ -0,0 +1,121 @@ +/** + * @file + * SNMP netconn frontend. + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Dirk Ziegelmeier <dziegel@gmx.de> + */ + +#include "lwip/apps/snmp_opts.h" + +#if LWIP_SNMP && SNMP_USE_NETCONN + +#include <string.h> +#include "lwip/api.h" +#include "lwip/ip.h" +#include "lwip/udp.h" +#include "snmp_msg.h" +#include "lwip/sys.h" + +/** SNMP netconn API worker thread */ +static void +snmp_netconn_thread(void *arg) +{ + struct netconn *conn; + struct netbuf *buf; + err_t err; + LWIP_UNUSED_ARG(arg); + + /* Bind to SNMP port with default IP address */ +#if LWIP_IPV6 + conn = netconn_new(NETCONN_UDP_IPV6); + netconn_bind(conn, IP6_ADDR_ANY, SNMP_IN_PORT); +#else /* LWIP_IPV6 */ + conn = netconn_new(NETCONN_UDP); + netconn_bind(conn, IP4_ADDR_ANY, SNMP_IN_PORT); +#endif /* LWIP_IPV6 */ + LWIP_ERROR("snmp_netconn: invalid conn", (conn != NULL), return;); + + snmp_traps_handle = conn; + + do { + err = netconn_recv(conn, &buf); + + if (err == ERR_OK) { + snmp_receive(conn, buf->p, &buf->addr, buf->port); + } + + if (buf != NULL) { + netbuf_delete(buf); + } + } while(1); +} + +err_t +snmp_sendto(void *handle, struct pbuf *p, const ip_addr_t *dst, u16_t port) +{ + err_t result; + struct netbuf buf; + + memset(&buf, 0, sizeof(buf)); + buf.p = p; + result = netconn_sendto((struct netconn*)handle, &buf, dst, port); + + return result; +} + +u8_t +snmp_get_local_ip_for_dst(void* handle, const ip_addr_t *dst, ip_addr_t *result) +{ + struct netconn* conn = (struct netconn*)handle; + struct netif *dst_if; + const ip_addr_t* dst_ip; + + LWIP_UNUSED_ARG(conn); /* unused in case of IPV4 only configuration */ + + ip_route_get_local_ip(&conn->pcb.udp->local_ip, dst, dst_if, dst_ip); + + if ((dst_if != NULL) && (dst_ip != NULL)) { + ip_addr_copy(*result, *dst_ip); + return 1; + } else { + return 0; + } +} + +/** + * Starts SNMP Agent. + */ +void +snmp_init(void) +{ + sys_thread_new("snmp_netconn", snmp_netconn_thread, NULL, SNMP_STACK_SIZE, SNMP_THREAD_PRIO); +} + +#endif /* LWIP_SNMP && SNMP_USE_NETCONN */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_pbuf_stream.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_pbuf_stream.c new file mode 100644 index 0000000..3c1217d --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_pbuf_stream.c @@ -0,0 +1,156 @@ +/** + * @file + * SNMP pbuf stream wrapper implementation (internal API, do not use in client code). + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Martin Hentschel <info@cl-soft.de> + * + */ + +#include "lwip/apps/snmp_opts.h" + +#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */ + +#include "snmp_pbuf_stream.h" +#include "lwip/def.h" +#include <string.h> + +err_t +snmp_pbuf_stream_init(struct snmp_pbuf_stream* pbuf_stream, struct pbuf* p, u16_t offset, u16_t length) +{ + pbuf_stream->offset = offset; + pbuf_stream->length = length; + pbuf_stream->pbuf = p; + + return ERR_OK; +} + +err_t +snmp_pbuf_stream_read(struct snmp_pbuf_stream* pbuf_stream, u8_t* data) +{ + if (pbuf_stream->length == 0) { + return ERR_BUF; + } + + if (pbuf_copy_partial(pbuf_stream->pbuf, data, 1, pbuf_stream->offset) == 0) { + return ERR_BUF; + } + + pbuf_stream->offset++; + pbuf_stream->length--; + + return ERR_OK; +} + +err_t +snmp_pbuf_stream_write(struct snmp_pbuf_stream* pbuf_stream, u8_t data) +{ + return snmp_pbuf_stream_writebuf(pbuf_stream, &data, 1); +} + +err_t +snmp_pbuf_stream_writebuf(struct snmp_pbuf_stream* pbuf_stream, const void* buf, u16_t buf_len) +{ + if (pbuf_stream->length < buf_len) { + return ERR_BUF; + } + + if (pbuf_take_at(pbuf_stream->pbuf, buf, buf_len, pbuf_stream->offset) != ERR_OK) { + return ERR_BUF; + } + + pbuf_stream->offset += buf_len; + pbuf_stream->length -= buf_len; + + return ERR_OK; +} + +err_t +snmp_pbuf_stream_writeto(struct snmp_pbuf_stream* pbuf_stream, struct snmp_pbuf_stream* target_pbuf_stream, u16_t len) +{ + + if ((pbuf_stream == NULL) || (target_pbuf_stream == NULL)) { + return ERR_ARG; + } + if ((len > pbuf_stream->length) || (len > target_pbuf_stream->length)) { + return ERR_ARG; + } + + if (len == 0) { + len = LWIP_MIN(pbuf_stream->length, target_pbuf_stream->length); + } + + while (len > 0) { + u16_t chunk_len; + err_t err; + u16_t target_offset; + struct pbuf* pbuf = pbuf_skip(pbuf_stream->pbuf, pbuf_stream->offset, &target_offset); + + if ((pbuf == NULL) || (pbuf->len == 0)) { + return ERR_BUF; + } + + chunk_len = LWIP_MIN(len, pbuf->len); + err = snmp_pbuf_stream_writebuf(target_pbuf_stream, &((u8_t*)pbuf->payload)[target_offset], chunk_len); + if (err != ERR_OK) { + return err; + } + + pbuf_stream->offset += chunk_len; + pbuf_stream->length -= chunk_len; + len -= chunk_len; + } + + return ERR_OK; +} + +err_t +snmp_pbuf_stream_seek(struct snmp_pbuf_stream* pbuf_stream, s32_t offset) +{ + if ((offset < 0) || (offset > pbuf_stream->length)) { + /* we cannot seek backwards or forward behind stream end */ + return ERR_ARG; + } + + pbuf_stream->offset += (u16_t)offset; + pbuf_stream->length -= (u16_t)offset; + + return ERR_OK; +} + +err_t +snmp_pbuf_stream_seek_abs(struct snmp_pbuf_stream* pbuf_stream, u32_t offset) +{ + s32_t rel_offset = offset - pbuf_stream->offset; + return snmp_pbuf_stream_seek(pbuf_stream, rel_offset); +} + +#endif /* LWIP_SNMP */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_pbuf_stream.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_pbuf_stream.h new file mode 100644 index 0000000..9778de7 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_pbuf_stream.h @@ -0,0 +1,73 @@ +/** + * @file + * SNMP pbuf stream wrapper (internal API, do not use in client code). + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Martin Hentschel <info@cl-soft.de> + * + */ + +#ifndef LWIP_HDR_APPS_SNMP_PBUF_STREAM_H +#define LWIP_HDR_APPS_SNMP_PBUF_STREAM_H + +#include "lwip/apps/snmp_opts.h" + +#if LWIP_SNMP + +#include "lwip/err.h" +#include "lwip/pbuf.h" + +#ifdef __cplusplus +extern "C" { +#endif + +struct snmp_pbuf_stream +{ + struct pbuf* pbuf; + u16_t offset; + u16_t length; +}; + +err_t snmp_pbuf_stream_init(struct snmp_pbuf_stream* pbuf_stream, struct pbuf* p, u16_t offset, u16_t length); +err_t snmp_pbuf_stream_read(struct snmp_pbuf_stream* pbuf_stream, u8_t* data); +err_t snmp_pbuf_stream_write(struct snmp_pbuf_stream* pbuf_stream, u8_t data); +err_t snmp_pbuf_stream_writebuf(struct snmp_pbuf_stream* pbuf_stream, const void* buf, u16_t buf_len); +err_t snmp_pbuf_stream_writeto(struct snmp_pbuf_stream* pbuf_stream, struct snmp_pbuf_stream* target_pbuf_stream, u16_t len); +err_t snmp_pbuf_stream_seek(struct snmp_pbuf_stream* pbuf_stream, s32_t offset); +err_t snmp_pbuf_stream_seek_abs(struct snmp_pbuf_stream* pbuf_stream, u32_t offset); + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_SNMP */ + +#endif /* LWIP_HDR_APPS_SNMP_PBUF_STREAM_H */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_raw.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_raw.c new file mode 100644 index 0000000..4a40864 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_raw.c @@ -0,0 +1,100 @@ +/** + * @file + * SNMP RAW API frontend. + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Dirk Ziegelmeier <dziegel@gmx.de> + */ + +#include "lwip/apps/snmp_opts.h" +#include "lwip/ip_addr.h" + +#if LWIP_SNMP && SNMP_USE_RAW + +#include "lwip/udp.h" +#include "lwip/ip.h" +#include "snmp_msg.h" + +/* lwIP UDP receive callback function */ +static void +snmp_recv(void *arg, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr, u16_t port) +{ + LWIP_UNUSED_ARG(arg); + + snmp_receive(pcb, p, addr, port); + + pbuf_free(p); +} + +err_t +snmp_sendto(void *handle, struct pbuf *p, const ip_addr_t *dst, u16_t port) +{ + return udp_sendto((struct udp_pcb*)handle, p, dst, port); +} + +u8_t +snmp_get_local_ip_for_dst(void* handle, const ip_addr_t *dst, ip_addr_t *result) +{ + struct udp_pcb* udp_pcb = (struct udp_pcb*)handle; + struct netif *dst_if; + const ip_addr_t* dst_ip; + + LWIP_UNUSED_ARG(udp_pcb); /* unused in case of IPV4 only configuration */ + + ip_route_get_local_ip(&udp_pcb->local_ip, dst, dst_if, dst_ip); + + if ((dst_if != NULL) && (dst_ip != NULL)) { + ip_addr_copy(*result, *dst_ip); + return 1; + } else { + return 0; + } +} + +/** + * @ingroup snmp_core + * Starts SNMP Agent. + * Allocates UDP pcb and binds it to IP_ANY_TYPE port 161. + */ +void +snmp_init(void) +{ + err_t err; + + struct udp_pcb *snmp_pcb = udp_new_ip_type(IPADDR_TYPE_ANY); + LWIP_ERROR("snmp_raw: no PCB", (snmp_pcb != NULL), return;); + + snmp_traps_handle = snmp_pcb; + + udp_recv(snmp_pcb, snmp_recv, (void *)SNMP_IN_PORT); + err = udp_bind(snmp_pcb, IP_ANY_TYPE, SNMP_IN_PORT); + LWIP_ERROR("snmp_raw: Unable to bind PCB", (err == ERR_OK), return;); +} + +#endif /* LWIP_SNMP && SNMP_USE_RAW */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_scalar.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_scalar.c new file mode 100644 index 0000000..136c9ec --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_scalar.c @@ -0,0 +1,220 @@ +/** + * @file + * SNMP scalar node support implementation. + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Martin Hentschel <info@cl-soft.de> + * + */ + +#include "lwip/apps/snmp_opts.h" + +#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/apps/snmp_scalar.h" +#include "lwip/apps/snmp_core.h" + +static s16_t snmp_scalar_array_get_value(struct snmp_node_instance* instance, void* value); +static snmp_err_t snmp_scalar_array_set_test(struct snmp_node_instance* instance, u16_t value_len, void* value); +static snmp_err_t snmp_scalar_array_set_value(struct snmp_node_instance* instance, u16_t value_len, void* value); + +snmp_err_t +snmp_scalar_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance) +{ + const struct snmp_scalar_node* scalar_node = (const struct snmp_scalar_node*)(const void*)instance->node; + + LWIP_UNUSED_ARG(root_oid); + LWIP_UNUSED_ARG(root_oid_len); + + /* scalar only has one dedicated instance: .0 */ + if ((instance->instance_oid.len != 1) || (instance->instance_oid.id[0] != 0)) { + return SNMP_ERR_NOSUCHINSTANCE; + } + + instance->access = scalar_node->access; + instance->asn1_type = scalar_node->asn1_type; + instance->get_value = scalar_node->get_value; + instance->set_test = scalar_node->set_test; + instance->set_value = scalar_node->set_value; + return SNMP_ERR_NOERROR; +} + +snmp_err_t +snmp_scalar_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance) +{ + /* because our only instance is .0 we can only return a next instance if no instance oid is passed */ + if (instance->instance_oid.len == 0) { + instance->instance_oid.len = 1; + instance->instance_oid.id[0] = 0; + + return snmp_scalar_get_instance(root_oid, root_oid_len, instance); + } + + return SNMP_ERR_NOSUCHINSTANCE; +} + + +snmp_err_t +snmp_scalar_array_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance) +{ + LWIP_UNUSED_ARG(root_oid); + LWIP_UNUSED_ARG(root_oid_len); + + if ((instance->instance_oid.len == 2) && (instance->instance_oid.id[1] == 0)) { + const struct snmp_scalar_array_node* array_node = (const struct snmp_scalar_array_node*)(const void*)instance->node; + const struct snmp_scalar_array_node_def* array_node_def = array_node->array_nodes; + u32_t i = 0; + + while (i < array_node->array_node_count) { + if (array_node_def->oid == instance->instance_oid.id[0]) { + break; + } + + array_node_def++; + i++; + } + + if (i < array_node->array_node_count) { + instance->access = array_node_def->access; + instance->asn1_type = array_node_def->asn1_type; + instance->get_value = snmp_scalar_array_get_value; + instance->set_test = snmp_scalar_array_set_test; + instance->set_value = snmp_scalar_array_set_value; + instance->reference.const_ptr = array_node_def; + + return SNMP_ERR_NOERROR; + } + } + + return SNMP_ERR_NOSUCHINSTANCE; +} + +snmp_err_t +snmp_scalar_array_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance) +{ + const struct snmp_scalar_array_node* array_node = (const struct snmp_scalar_array_node*)(const void*)instance->node; + const struct snmp_scalar_array_node_def* array_node_def = array_node->array_nodes; + const struct snmp_scalar_array_node_def* result = NULL; + + LWIP_UNUSED_ARG(root_oid); + LWIP_UNUSED_ARG(root_oid_len); + + if ((instance->instance_oid.len == 0) && (array_node->array_node_count > 0)) { + /* return node with lowest OID */ + u16_t i = 0; + + result = array_node_def; + array_node_def++; + + for (i = 1; i < array_node->array_node_count; i++) { + if (array_node_def->oid < result->oid) { + result = array_node_def; + } + array_node_def++; + } + } else if (instance->instance_oid.len >= 1) { + if (instance->instance_oid.len == 1) { + /* if we have the requested OID we return its instance, otherwise we search for the next available */ + u16_t i = 0; + while (i < array_node->array_node_count) { + if (array_node_def->oid == instance->instance_oid.id[0]) { + result = array_node_def; + break; + } + + array_node_def++; + i++; + } + } + if (result == NULL) { + u32_t oid_dist = 0xFFFFFFFFUL; + u16_t i = 0; + array_node_def = array_node->array_nodes; /* may be already at the end when if case before was executed without result -> reinitialize to start */ + while (i < array_node->array_node_count) { + if ((array_node_def->oid > instance->instance_oid.id[0]) && + ((u32_t)(array_node_def->oid - instance->instance_oid.id[0]) < oid_dist)) { + result = array_node_def; + oid_dist = array_node_def->oid - instance->instance_oid.id[0]; + } + + array_node_def++; + i++; + } + } + } + + if (result == NULL) { + /* nothing to return */ + return SNMP_ERR_NOSUCHINSTANCE; + } + + instance->instance_oid.len = 2; + instance->instance_oid.id[0] = result->oid; + instance->instance_oid.id[1] = 0; + + instance->access = result->access; + instance->asn1_type = result->asn1_type; + instance->get_value = snmp_scalar_array_get_value; + instance->set_test = snmp_scalar_array_set_test; + instance->set_value = snmp_scalar_array_set_value; + instance->reference.const_ptr = result; + + return SNMP_ERR_NOERROR; +} + +static s16_t +snmp_scalar_array_get_value(struct snmp_node_instance* instance, void* value) +{ + const struct snmp_scalar_array_node* array_node = (const struct snmp_scalar_array_node*)(const void*)instance->node; + const struct snmp_scalar_array_node_def* array_node_def = (const struct snmp_scalar_array_node_def*)instance->reference.const_ptr; + + return array_node->get_value(array_node_def, value); +} + +static snmp_err_t +snmp_scalar_array_set_test(struct snmp_node_instance* instance, u16_t value_len, void* value) +{ + const struct snmp_scalar_array_node* array_node = (const struct snmp_scalar_array_node*)(const void*)instance->node; + const struct snmp_scalar_array_node_def* array_node_def = (const struct snmp_scalar_array_node_def*)instance->reference.const_ptr; + + return array_node->set_test(array_node_def, value_len, value); +} + +static snmp_err_t +snmp_scalar_array_set_value(struct snmp_node_instance* instance, u16_t value_len, void* value) +{ + const struct snmp_scalar_array_node* array_node = (const struct snmp_scalar_array_node*)(const void*)instance->node; + const struct snmp_scalar_array_node_def* array_node_def = (const struct snmp_scalar_array_node_def*)instance->reference.const_ptr; + + return array_node->set_value(array_node_def, value_len, value); +} + +#endif /* LWIP_SNMP */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_table.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_table.c new file mode 100644 index 0000000..63ca595 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_table.c @@ -0,0 +1,343 @@ +/** + * @file + * SNMP table support implementation. + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Martin Hentschel <info@cl-soft.de> + * + */ + +#include "lwip/apps/snmp_opts.h" + +#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/apps/snmp_core.h" +#include "lwip/apps/snmp_table.h" +#include <string.h> + +snmp_err_t snmp_table_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance) +{ + snmp_err_t ret = SNMP_ERR_NOSUCHINSTANCE; + const struct snmp_table_node* table_node = (const struct snmp_table_node*)(const void*)instance->node; + + LWIP_UNUSED_ARG(root_oid); + LWIP_UNUSED_ARG(root_oid_len); + + /* check min. length (fixed row entry definition, column, row instance oid with at least one entry */ + /* fixed row entry always has oid 1 */ + if ((instance->instance_oid.len >= 3) && (instance->instance_oid.id[0] == 1)) { + /* search column */ + const struct snmp_table_col_def* col_def = table_node->columns; + u16_t i = table_node->column_count; + while (i > 0) { + if (col_def->index == instance->instance_oid.id[1]) { + break; + } + + col_def++; + i--; + } + + if (i > 0) { + /* everything may be overwritten by get_cell_instance_method() in order to implement special handling for single columns/cells */ + instance->asn1_type = col_def->asn1_type; + instance->access = col_def->access; + instance->get_value = table_node->get_value; + instance->set_test = table_node->set_test; + instance->set_value = table_node->set_value; + + ret = table_node->get_cell_instance( + &(instance->instance_oid.id[1]), + &(instance->instance_oid.id[2]), + instance->instance_oid.len-2, + instance); + } + } + + return ret; +} + +snmp_err_t snmp_table_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance) +{ + const struct snmp_table_node* table_node = (const struct snmp_table_node*)(const void*)instance->node; + const struct snmp_table_col_def* col_def; + struct snmp_obj_id row_oid; + u32_t column = 0; + snmp_err_t result; + + LWIP_UNUSED_ARG(root_oid); + LWIP_UNUSED_ARG(root_oid_len); + + /* check that first part of id is 0 or 1, referencing fixed row entry */ + if ((instance->instance_oid.len > 0) && (instance->instance_oid.id[0] > 1)) { + return SNMP_ERR_NOSUCHINSTANCE; + } + if (instance->instance_oid.len > 1) { + column = instance->instance_oid.id[1]; + } + if (instance->instance_oid.len > 2) { + snmp_oid_assign(&row_oid, &(instance->instance_oid.id[2]), instance->instance_oid.len - 2); + } else { + row_oid.len = 0; + } + + instance->get_value = table_node->get_value; + instance->set_test = table_node->set_test; + instance->set_value = table_node->set_value; + + /* resolve column and value */ + do { + u16_t i; + const struct snmp_table_col_def* next_col_def = NULL; + col_def = table_node->columns; + + for (i = 0; i < table_node->column_count; i++) { + if (col_def->index == column) { + next_col_def = col_def; + break; + } else if ((col_def->index > column) && ((next_col_def == NULL) || (col_def->index < next_col_def->index))) { + next_col_def = col_def; + } + col_def++; + } + + if (next_col_def == NULL) { + /* no further column found */ + return SNMP_ERR_NOSUCHINSTANCE; + } + + instance->asn1_type = next_col_def->asn1_type; + instance->access = next_col_def->access; + + result = table_node->get_next_cell_instance( + &next_col_def->index, + &row_oid, + instance); + + if (result == SNMP_ERR_NOERROR) { + col_def = next_col_def; + break; + } + + row_oid.len = 0; /* reset row_oid because we switch to next column and start with the first entry there */ + column = next_col_def->index + 1; + } while (1); + + /* build resulting oid */ + instance->instance_oid.len = 2; + instance->instance_oid.id[0] = 1; + instance->instance_oid.id[1] = col_def->index; + snmp_oid_append(&instance->instance_oid, row_oid.id, row_oid.len); + + return SNMP_ERR_NOERROR; +} + + +snmp_err_t snmp_table_simple_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance) +{ + snmp_err_t ret = SNMP_ERR_NOSUCHINSTANCE; + const struct snmp_table_simple_node* table_node = (const struct snmp_table_simple_node*)(const void*)instance->node; + + LWIP_UNUSED_ARG(root_oid); + LWIP_UNUSED_ARG(root_oid_len); + + /* check min. length (fixed row entry definition, column, row instance oid with at least one entry */ + /* fixed row entry always has oid 1 */ + if ((instance->instance_oid.len >= 3) && (instance->instance_oid.id[0] == 1)) { + ret = table_node->get_cell_value( + &(instance->instance_oid.id[1]), + &(instance->instance_oid.id[2]), + instance->instance_oid.len-2, + &instance->reference, + &instance->reference_len); + + if (ret == SNMP_ERR_NOERROR) { + /* search column */ + const struct snmp_table_simple_col_def* col_def = table_node->columns; + u32_t i = table_node->column_count; + while (i > 0) { + if (col_def->index == instance->instance_oid.id[1]) { + break; + } + + col_def++; + i--; + } + + if (i > 0) { + instance->asn1_type = col_def->asn1_type; + instance->access = SNMP_NODE_INSTANCE_READ_ONLY; + instance->set_test = NULL; + instance->set_value = NULL; + + switch (col_def->data_type) { + case SNMP_VARIANT_VALUE_TYPE_U32: + instance->get_value = snmp_table_extract_value_from_u32ref; + break; + case SNMP_VARIANT_VALUE_TYPE_S32: + instance->get_value = snmp_table_extract_value_from_s32ref; + break; + case SNMP_VARIANT_VALUE_TYPE_PTR: /* fall through */ + case SNMP_VARIANT_VALUE_TYPE_CONST_PTR: + instance->get_value = snmp_table_extract_value_from_refconstptr; + break; + default: + LWIP_DEBUGF(SNMP_DEBUG, ("snmp_table_simple_get_instance(): unknown column data_type: %d\n", col_def->data_type)); + return SNMP_ERR_GENERROR; + } + + ret = SNMP_ERR_NOERROR; + } else { + ret = SNMP_ERR_NOSUCHINSTANCE; + } + } + } + + return ret; +} + +snmp_err_t snmp_table_simple_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance) +{ + const struct snmp_table_simple_node* table_node = (const struct snmp_table_simple_node*)(const void*)instance->node; + const struct snmp_table_simple_col_def* col_def; + struct snmp_obj_id row_oid; + u32_t column = 0; + snmp_err_t result; + + LWIP_UNUSED_ARG(root_oid); + LWIP_UNUSED_ARG(root_oid_len); + + /* check that first part of id is 0 or 1, referencing fixed row entry */ + if ((instance->instance_oid.len > 0) && (instance->instance_oid.id[0] > 1)) { + return SNMP_ERR_NOSUCHINSTANCE; + } + if (instance->instance_oid.len > 1) { + column = instance->instance_oid.id[1]; + } + if (instance->instance_oid.len > 2) { + snmp_oid_assign(&row_oid, &(instance->instance_oid.id[2]), instance->instance_oid.len - 2); + } else { + row_oid.len = 0; + } + + /* resolve column and value */ + do { + u32_t i; + const struct snmp_table_simple_col_def* next_col_def = NULL; + col_def = table_node->columns; + + for (i = 0; i < table_node->column_count; i++) { + if (col_def->index == column) { + next_col_def = col_def; + break; + } else if ((col_def->index > column) && ((next_col_def == NULL) || + (col_def->index < next_col_def->index))) { + next_col_def = col_def; + } + col_def++; + } + + if (next_col_def == NULL) { + /* no further column found */ + return SNMP_ERR_NOSUCHINSTANCE; + } + + result = table_node->get_next_cell_instance_and_value( + &next_col_def->index, + &row_oid, + &instance->reference, + &instance->reference_len); + + if (result == SNMP_ERR_NOERROR) { + col_def = next_col_def; + break; + } + + row_oid.len = 0; /* reset row_oid because we switch to next column and start with the first entry there */ + column = next_col_def->index + 1; + } + while (1); + + instance->asn1_type = col_def->asn1_type; + instance->access = SNMP_NODE_INSTANCE_READ_ONLY; + instance->set_test = NULL; + instance->set_value = NULL; + + switch (col_def->data_type) { + case SNMP_VARIANT_VALUE_TYPE_U32: + instance->get_value = snmp_table_extract_value_from_u32ref; + break; + case SNMP_VARIANT_VALUE_TYPE_S32: + instance->get_value = snmp_table_extract_value_from_s32ref; + break; + case SNMP_VARIANT_VALUE_TYPE_PTR: /* fall through */ + case SNMP_VARIANT_VALUE_TYPE_CONST_PTR: + instance->get_value = snmp_table_extract_value_from_refconstptr; + break; + default: + LWIP_DEBUGF(SNMP_DEBUG, ("snmp_table_simple_get_instance(): unknown column data_type: %d\n", col_def->data_type)); + return SNMP_ERR_GENERROR; + } + + /* build resulting oid */ + instance->instance_oid.len = 2; + instance->instance_oid.id[0] = 1; + instance->instance_oid.id[1] = col_def->index; + snmp_oid_append(&instance->instance_oid, row_oid.id, row_oid.len); + + return SNMP_ERR_NOERROR; +} + + +s16_t +snmp_table_extract_value_from_s32ref(struct snmp_node_instance* instance, void* value) +{ + s32_t *dst = (s32_t*)value; + *dst = instance->reference.s32; + return sizeof(*dst); +} + +s16_t +snmp_table_extract_value_from_u32ref(struct snmp_node_instance* instance, void* value) +{ + u32_t *dst = (u32_t*)value; + *dst = instance->reference.u32; + return sizeof(*dst); +} + +s16_t +snmp_table_extract_value_from_refconstptr(struct snmp_node_instance* instance, void* value) +{ + MEMCPY(value, instance->reference.const_ptr, instance->reference_len); + return (u16_t)instance->reference_len; +} + +#endif /* LWIP_SNMP */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_threadsync.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_threadsync.c new file mode 100644 index 0000000..204f265 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_threadsync.c @@ -0,0 +1,219 @@ +/** + * @file + * SNMP thread synchronization implementation. + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Dirk Ziegelmeier <dziegel@gmx.de> + */ + +#include "lwip/apps/snmp_opts.h" + +#if LWIP_SNMP && (NO_SYS == 0) /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/apps/snmp_threadsync.h" +#include "lwip/apps/snmp_core.h" +#include "lwip/sys.h" +#include <string.h> + +static void +call_synced_function(struct threadsync_data *call_data, snmp_threadsync_called_fn fn) +{ + sys_mutex_lock(&call_data->threadsync_node->instance->sem_usage_mutex); + call_data->threadsync_node->instance->sync_fn(fn, call_data); + sys_sem_wait(&call_data->threadsync_node->instance->sem); + sys_mutex_unlock(&call_data->threadsync_node->instance->sem_usage_mutex); +} + +static void +threadsync_get_value_synced(void *ctx) +{ + struct threadsync_data *call_data = (struct threadsync_data*)ctx; + + call_data->retval.s16 = call_data->proxy_instance.get_value(&call_data->proxy_instance, call_data->arg1.value); + + sys_sem_signal(&call_data->threadsync_node->instance->sem); +} + +static s16_t +threadsync_get_value(struct snmp_node_instance* instance, void* value) +{ + struct threadsync_data *call_data = (struct threadsync_data*)instance->reference.ptr; + + call_data->arg1.value = value; + call_synced_function(call_data, threadsync_get_value_synced); + + return call_data->retval.s16; +} + +static void +threadsync_set_test_synced(void *ctx) +{ + struct threadsync_data *call_data = (struct threadsync_data*)ctx; + + call_data->retval.err = call_data->proxy_instance.set_test(&call_data->proxy_instance, call_data->arg2.len, call_data->arg1.value); + + sys_sem_signal(&call_data->threadsync_node->instance->sem); +} + +static snmp_err_t +threadsync_set_test(struct snmp_node_instance* instance, u16_t len, void *value) +{ + struct threadsync_data *call_data = (struct threadsync_data*)instance->reference.ptr; + + call_data->arg1.value = value; + call_data->arg2.len = len; + call_synced_function(call_data, threadsync_set_test_synced); + + return call_data->retval.err; +} + +static void +threadsync_set_value_synced(void *ctx) +{ + struct threadsync_data *call_data = (struct threadsync_data*)ctx; + + call_data->retval.err = call_data->proxy_instance.set_value(&call_data->proxy_instance, call_data->arg2.len, call_data->arg1.value); + + sys_sem_signal(&call_data->threadsync_node->instance->sem); +} + +static snmp_err_t +threadsync_set_value(struct snmp_node_instance* instance, u16_t len, void *value) +{ + struct threadsync_data *call_data = (struct threadsync_data*)instance->reference.ptr; + + call_data->arg1.value = value; + call_data->arg2.len = len; + call_synced_function(call_data, threadsync_set_value_synced); + + return call_data->retval.err; +} + +static void +threadsync_release_instance_synced(void* ctx) +{ + struct threadsync_data *call_data = (struct threadsync_data*)ctx; + + call_data->proxy_instance.release_instance(&call_data->proxy_instance); + + sys_sem_signal(&call_data->threadsync_node->instance->sem); +} + +static void +threadsync_release_instance(struct snmp_node_instance *instance) +{ + struct threadsync_data *call_data = (struct threadsync_data*)instance->reference.ptr; + + if (call_data->proxy_instance.release_instance != NULL) { + call_synced_function(call_data, threadsync_release_instance_synced); + } +} + +static void +get_instance_synced(void* ctx) +{ + struct threadsync_data *call_data = (struct threadsync_data*)ctx; + const struct snmp_leaf_node *leaf = (const struct snmp_leaf_node*)(const void*)call_data->proxy_instance.node; + + call_data->retval.err = leaf->get_instance(call_data->arg1.root_oid, call_data->arg2.root_oid_len, &call_data->proxy_instance); + + sys_sem_signal(&call_data->threadsync_node->instance->sem); +} + +static void +get_next_instance_synced(void* ctx) +{ + struct threadsync_data *call_data = (struct threadsync_data*)ctx; + const struct snmp_leaf_node *leaf = (const struct snmp_leaf_node*)(const void*)call_data->proxy_instance.node; + + call_data->retval.err = leaf->get_next_instance(call_data->arg1.root_oid, call_data->arg2.root_oid_len, &call_data->proxy_instance); + + sys_sem_signal(&call_data->threadsync_node->instance->sem); +} + +static snmp_err_t +do_sync(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance, snmp_threadsync_called_fn fn) +{ + const struct snmp_threadsync_node *threadsync_node = (const struct snmp_threadsync_node*)(const void*)instance->node; + struct threadsync_data *call_data = &threadsync_node->instance->data; + + if (threadsync_node->node.node.oid != threadsync_node->target->node.oid) { + LWIP_DEBUGF(SNMP_DEBUG, ("Sync node OID does not match target node OID")); + return SNMP_ERR_NOSUCHINSTANCE; + } + + memset(&call_data->proxy_instance, 0, sizeof(call_data->proxy_instance)); + + instance->reference.ptr = call_data; + snmp_oid_assign(&call_data->proxy_instance.instance_oid, instance->instance_oid.id, instance->instance_oid.len); + + call_data->proxy_instance.node = &threadsync_node->target->node; + call_data->threadsync_node = threadsync_node; + + call_data->arg1.root_oid = root_oid; + call_data->arg2.root_oid_len = root_oid_len; + call_synced_function(call_data, fn); + + if (call_data->retval.err == SNMP_ERR_NOERROR) { + instance->access = call_data->proxy_instance.access; + instance->asn1_type = call_data->proxy_instance.asn1_type; + instance->release_instance = threadsync_release_instance; + instance->get_value = (call_data->proxy_instance.get_value != NULL)? threadsync_get_value : NULL; + instance->set_value = (call_data->proxy_instance.set_value != NULL)? threadsync_set_value : NULL; + instance->set_test = (call_data->proxy_instance.set_test != NULL)? threadsync_set_test : NULL; + snmp_oid_assign(&instance->instance_oid, call_data->proxy_instance.instance_oid.id, call_data->proxy_instance.instance_oid.len); + } + + return call_data->retval.err; +} + +snmp_err_t +snmp_threadsync_get_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance) +{ + return do_sync(root_oid, root_oid_len, instance, get_instance_synced); +} + +snmp_err_t +snmp_threadsync_get_next_instance(const u32_t *root_oid, u8_t root_oid_len, struct snmp_node_instance* instance) +{ + return do_sync(root_oid, root_oid_len, instance, get_next_instance_synced); +} + +/** Initializes thread synchronization instance */ +void snmp_threadsync_init(struct snmp_threadsync_instance *instance, snmp_threadsync_synchronizer_fn sync_fn) +{ + err_t err = sys_mutex_new(&instance->sem_usage_mutex); + LWIP_ASSERT("Failed to set up mutex", err == ERR_OK); + err = sys_sem_new(&instance->sem, 0); + LWIP_UNUSED_ARG(err); /* in case of LWIP_NOASSERT */ + LWIP_ASSERT("Failed to set up semaphore", err == ERR_OK); + instance->sync_fn = sync_fn; +} + +#endif /* LWIP_SNMP */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_traps.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_traps.c new file mode 100644 index 0000000..0d2df64 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmp_traps.c @@ -0,0 +1,445 @@ +/** + * @file + * SNMPv1 traps implementation. + */ + +/* + * Copyright (c) 2001-2004 Swedish Institute of Computer Science. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Martin Hentschel + * Christiaan Simons <christiaan.simons@axon.tv> + * + */ + +#include "lwip/apps/snmp_opts.h" + +#if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */ + +#include <string.h> + +#include "lwip/snmp.h" +#include "lwip/sys.h" +#include "lwip/apps/snmp.h" +#include "lwip/apps/snmp_core.h" +#include "snmp_msg.h" +#include "snmp_asn1.h" +#include "snmp_core_priv.h" + +struct snmp_msg_trap +{ + /* source enterprise ID (sysObjectID) */ + const struct snmp_obj_id *enterprise; + /* source IP address, raw network order format */ + ip_addr_t sip; + /* generic trap code */ + u32_t gen_trap; + /* specific trap code */ + u32_t spc_trap; + /* timestamp */ + u32_t ts; + /* snmp_version */ + u32_t snmp_version; + + /* output trap lengths used in ASN encoding */ + /* encoding pdu length */ + u16_t pdulen; + /* encoding community length */ + u16_t comlen; + /* encoding sequence length */ + u16_t seqlen; + /* encoding varbinds sequence length */ + u16_t vbseqlen; +}; + +static u16_t snmp_trap_varbind_sum(struct snmp_msg_trap *trap, struct snmp_varbind *varbinds); +static u16_t snmp_trap_header_sum(struct snmp_msg_trap *trap, u16_t vb_len); +static void snmp_trap_header_enc(struct snmp_msg_trap *trap, struct snmp_pbuf_stream *pbuf_stream); +static void snmp_trap_varbind_enc(struct snmp_msg_trap *trap, struct snmp_pbuf_stream *pbuf_stream, struct snmp_varbind *varbinds); + +/** Agent community string for sending traps */ +extern const char *snmp_community_trap; + +void* snmp_traps_handle; + +struct snmp_trap_dst +{ + /* destination IP address in network order */ + ip_addr_t dip; + /* set to 0 when disabled, >0 when enabled */ + u8_t enable; +}; +static struct snmp_trap_dst trap_dst[SNMP_TRAP_DESTINATIONS]; + +static u8_t snmp_auth_traps_enabled = 0; + +/** + * @ingroup snmp_traps + * Sets enable switch for this trap destination. + * @param dst_idx index in 0 .. SNMP_TRAP_DESTINATIONS-1 + * @param enable switch if 0 destination is disabled >0 enabled. + */ +void +snmp_trap_dst_enable(u8_t dst_idx, u8_t enable) +{ + if (dst_idx < SNMP_TRAP_DESTINATIONS) { + trap_dst[dst_idx].enable = enable; + } +} + +/** + * @ingroup snmp_traps + * Sets IPv4 address for this trap destination. + * @param dst_idx index in 0 .. SNMP_TRAP_DESTINATIONS-1 + * @param dst IPv4 address in host order. + */ +void +snmp_trap_dst_ip_set(u8_t dst_idx, const ip_addr_t *dst) +{ + if (dst_idx < SNMP_TRAP_DESTINATIONS) { + ip_addr_set(&trap_dst[dst_idx].dip, dst); + } +} + +/** + * @ingroup snmp_traps + * Enable/disable authentication traps + */ +void +snmp_set_auth_traps_enabled(u8_t enable) +{ + snmp_auth_traps_enabled = enable; +} + +/** + * @ingroup snmp_traps + * Get authentication traps enabled state + */ +u8_t +snmp_get_auth_traps_enabled(void) +{ + return snmp_auth_traps_enabled; +} + + +/** + * @ingroup snmp_traps + * Sends a generic or enterprise specific trap message. + * + * @param eoid points to enterprise object identifier + * @param generic_trap is the trap code + * @param specific_trap used for enterprise traps when generic_trap == 6 + * @param varbinds linked list of varbinds to be sent + * @return ERR_OK when success, ERR_MEM if we're out of memory + * + * @note the use of the enterprise identifier field + * is per RFC1215. + * Use .iso.org.dod.internet.mgmt.mib-2.snmp for generic traps + * and .iso.org.dod.internet.private.enterprises.yourenterprise + * (sysObjectID) for specific traps. + */ +err_t +snmp_send_trap(const struct snmp_obj_id* eoid, s32_t generic_trap, s32_t specific_trap, struct snmp_varbind *varbinds) +{ + struct snmp_msg_trap trap_msg; + struct snmp_trap_dst *td; + struct pbuf *p; + u16_t i, tot_len; + err_t err = ERR_OK; + + trap_msg.snmp_version = 0; + + for (i = 0, td = &trap_dst[0]; i < SNMP_TRAP_DESTINATIONS; i++, td++) { + if ((td->enable != 0) && !ip_addr_isany(&td->dip)) { + /* lookup current source address for this dst */ + if (snmp_get_local_ip_for_dst(snmp_traps_handle, &td->dip, &trap_msg.sip)) { + if (eoid == NULL) { + trap_msg.enterprise = snmp_get_device_enterprise_oid(); + } else { + trap_msg.enterprise = eoid; + } + + trap_msg.gen_trap = generic_trap; + if (generic_trap == SNMP_GENTRAP_ENTERPRISE_SPECIFIC) { + trap_msg.spc_trap = specific_trap; + } else { + trap_msg.spc_trap = 0; + } + + MIB2_COPY_SYSUPTIME_TO(&trap_msg.ts); + + /* pass 0, calculate length fields */ + tot_len = snmp_trap_varbind_sum(&trap_msg, varbinds); + tot_len = snmp_trap_header_sum(&trap_msg, tot_len); + + /* allocate pbuf(s) */ + p = pbuf_alloc(PBUF_TRANSPORT, tot_len, PBUF_RAM); + if (p != NULL) { + struct snmp_pbuf_stream pbuf_stream; + snmp_pbuf_stream_init(&pbuf_stream, p, 0, tot_len); + + /* pass 1, encode packet ino the pbuf(s) */ + snmp_trap_header_enc(&trap_msg, &pbuf_stream); + snmp_trap_varbind_enc(&trap_msg, &pbuf_stream, varbinds); + + snmp_stats.outtraps++; + snmp_stats.outpkts++; + + /** send to the TRAP destination */ + snmp_sendto(snmp_traps_handle, p, &td->dip, SNMP_TRAP_PORT); + pbuf_free(p); + } else { + err = ERR_MEM; + } + } else { + /* routing error */ + err = ERR_RTE; + } + } + } + return err; +} + +/** + * @ingroup snmp_traps + * Send generic SNMP trap + */ +err_t +snmp_send_trap_generic(s32_t generic_trap) +{ + static const struct snmp_obj_id oid = { 7, { 1, 3, 6, 1, 2, 1, 11 } }; + return snmp_send_trap(&oid, generic_trap, 0, NULL); +} + +/** + * @ingroup snmp_traps + * Send specific SNMP trap with variable bindings + */ +err_t +snmp_send_trap_specific(s32_t specific_trap, struct snmp_varbind *varbinds) +{ + return snmp_send_trap(NULL, SNMP_GENTRAP_ENTERPRISE_SPECIFIC, specific_trap, varbinds); +} + +/** + * @ingroup snmp_traps + * Send coldstart trap + */ +void +snmp_coldstart_trap(void) +{ + snmp_send_trap_generic(SNMP_GENTRAP_COLDSTART); +} + +/** + * @ingroup snmp_traps + * Send authentication failure trap (used internally by agent) + */ +void +snmp_authfail_trap(void) +{ + if (snmp_auth_traps_enabled != 0) { + snmp_send_trap_generic(SNMP_GENTRAP_AUTH_FAILURE); + } +} + +static u16_t +snmp_trap_varbind_sum(struct snmp_msg_trap *trap, struct snmp_varbind *varbinds) +{ + struct snmp_varbind *varbind; + u16_t tot_len; + u8_t tot_len_len; + + tot_len = 0; + varbind = varbinds; + while (varbind != NULL) { + struct snmp_varbind_len len; + + if (snmp_varbind_length(varbind, &len) == ERR_OK) { + tot_len += 1 + len.vb_len_len + len.vb_value_len; + } + + varbind = varbind->next; + } + + trap->vbseqlen = tot_len; + snmp_asn1_enc_length_cnt(trap->vbseqlen, &tot_len_len); + tot_len += 1 + tot_len_len; + + return tot_len; +} + +/** + * Sums trap header field lengths from tail to head and + * returns trap_header_lengths for second encoding pass. + * + * @param trap Trap message + * @param vb_len varbind-list length + * @return the required length for encoding the trap header + */ +static u16_t +snmp_trap_header_sum(struct snmp_msg_trap *trap, u16_t vb_len) +{ + u16_t tot_len; + u16_t len; + u8_t lenlen; + + tot_len = vb_len; + + snmp_asn1_enc_u32t_cnt(trap->ts, &len); + snmp_asn1_enc_length_cnt(len, &lenlen); + tot_len += 1 + len + lenlen; + + snmp_asn1_enc_s32t_cnt(trap->spc_trap, &len); + snmp_asn1_enc_length_cnt(len, &lenlen); + tot_len += 1 + len + lenlen; + + snmp_asn1_enc_s32t_cnt(trap->gen_trap, &len); + snmp_asn1_enc_length_cnt(len, &lenlen); + tot_len += 1 + len + lenlen; + + if (IP_IS_V6_VAL(trap->sip)) { +#if LWIP_IPV6 + len = sizeof(ip_2_ip6(&trap->sip)->addr); +#endif + } else { +#if LWIP_IPV4 + len = sizeof(ip_2_ip4(&trap->sip)->addr); +#endif + } + snmp_asn1_enc_length_cnt(len, &lenlen); + tot_len += 1 + len + lenlen; + + snmp_asn1_enc_oid_cnt(trap->enterprise->id, trap->enterprise->len, &len); + snmp_asn1_enc_length_cnt(len, &lenlen); + tot_len += 1 + len + lenlen; + + trap->pdulen = tot_len; + snmp_asn1_enc_length_cnt(trap->pdulen, &lenlen); + tot_len += 1 + lenlen; + + trap->comlen = (u16_t)LWIP_MIN(strlen(snmp_community_trap), 0xFFFF); + snmp_asn1_enc_length_cnt(trap->comlen, &lenlen); + tot_len += 1 + lenlen + trap->comlen; + + snmp_asn1_enc_s32t_cnt(trap->snmp_version, &len); + snmp_asn1_enc_length_cnt(len, &lenlen); + tot_len += 1 + len + lenlen; + + trap->seqlen = tot_len; + snmp_asn1_enc_length_cnt(trap->seqlen, &lenlen); + tot_len += 1 + lenlen; + + return tot_len; +} + +static void +snmp_trap_varbind_enc(struct snmp_msg_trap *trap, struct snmp_pbuf_stream *pbuf_stream, struct snmp_varbind *varbinds) +{ + struct snmp_asn1_tlv tlv; + struct snmp_varbind *varbind; + + varbind = varbinds; + + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_SEQUENCE, 0, trap->vbseqlen); + snmp_ans1_enc_tlv(pbuf_stream, &tlv); + + while (varbind != NULL) { + snmp_append_outbound_varbind(pbuf_stream, varbind); + + varbind = varbind->next; + } +} + +/** + * Encodes trap header from head to tail. + */ +static void +snmp_trap_header_enc(struct snmp_msg_trap *trap, struct snmp_pbuf_stream *pbuf_stream) +{ + struct snmp_asn1_tlv tlv; + + /* 'Message' sequence */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_SEQUENCE, 0, trap->seqlen); + snmp_ans1_enc_tlv(pbuf_stream, &tlv); + + /* version */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_INTEGER, 0, 0); + snmp_asn1_enc_s32t_cnt(trap->snmp_version, &tlv.value_len); + snmp_ans1_enc_tlv(pbuf_stream, &tlv); + snmp_asn1_enc_s32t(pbuf_stream, tlv.value_len, trap->snmp_version); + + /* community */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_OCTET_STRING, 0, trap->comlen); + snmp_ans1_enc_tlv(pbuf_stream, &tlv); + snmp_asn1_enc_raw(pbuf_stream, (const u8_t *)snmp_community_trap, trap->comlen); + + /* 'PDU' sequence */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, (SNMP_ASN1_CLASS_CONTEXT | SNMP_ASN1_CONTENTTYPE_CONSTRUCTED | SNMP_ASN1_CONTEXT_PDU_TRAP), 0, trap->pdulen); + snmp_ans1_enc_tlv(pbuf_stream, &tlv); + + /* object ID */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_OBJECT_ID, 0, 0); + snmp_asn1_enc_oid_cnt(trap->enterprise->id, trap->enterprise->len, &tlv.value_len); + snmp_ans1_enc_tlv(pbuf_stream, &tlv); + snmp_asn1_enc_oid(pbuf_stream, trap->enterprise->id, trap->enterprise->len); + + /* IP addr */ + if (IP_IS_V6_VAL(trap->sip)) { +#if LWIP_IPV6 + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_IPADDR, 0, sizeof(ip_2_ip6(&trap->sip)->addr)); + snmp_ans1_enc_tlv(pbuf_stream, &tlv); + snmp_asn1_enc_raw(pbuf_stream, (const u8_t *)&ip_2_ip6(&trap->sip)->addr, sizeof(ip_2_ip6(&trap->sip)->addr)); +#endif + } else { +#if LWIP_IPV4 + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_IPADDR, 0, sizeof(ip_2_ip4(&trap->sip)->addr)); + snmp_ans1_enc_tlv(pbuf_stream, &tlv); + snmp_asn1_enc_raw(pbuf_stream, (const u8_t *)&ip_2_ip4(&trap->sip)->addr, sizeof(ip_2_ip4(&trap->sip)->addr)); +#endif + } + + /* trap length */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_INTEGER, 0, 0); + snmp_asn1_enc_s32t_cnt(trap->gen_trap, &tlv.value_len); + snmp_ans1_enc_tlv(pbuf_stream, &tlv); + snmp_asn1_enc_s32t(pbuf_stream, tlv.value_len, trap->gen_trap); + + /* specific trap */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_INTEGER, 0, 0); + snmp_asn1_enc_s32t_cnt(trap->spc_trap, &tlv.value_len); + snmp_ans1_enc_tlv(pbuf_stream, &tlv); + snmp_asn1_enc_s32t(pbuf_stream, tlv.value_len, trap->spc_trap); + + /* timestamp */ + SNMP_ASN1_SET_TLV_PARAMS(tlv, SNMP_ASN1_TYPE_TIMETICKS, 0, 0); + snmp_asn1_enc_s32t_cnt(trap->ts, &tlv.value_len); + snmp_ans1_enc_tlv(pbuf_stream, &tlv); + snmp_asn1_enc_s32t(pbuf_stream, tlv.value_len, trap->ts); +} + +#endif /* LWIP_SNMP */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmpv3.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmpv3.c new file mode 100644 index 0000000..69fb3a0 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmpv3.c @@ -0,0 +1,136 @@ +/** + * @file + * Additional SNMPv3 functionality RFC3414 and RFC3826. + */ + +/* + * Copyright (c) 2016 Elias Oenal. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Elias Oenal <lwip@eliasoenal.com> + */ + +#include "snmpv3_priv.h" +#include "lwip/apps/snmpv3.h" +#include "lwip/sys.h" +#include <string.h> + +#if LWIP_SNMP && LWIP_SNMP_V3 + +#ifdef LWIP_SNMPV3_INCLUDE_ENGINE +#include LWIP_SNMPV3_INCLUDE_ENGINE +#endif + +#define SNMP_MAX_TIME_BOOT 2147483647UL + +/** Call this if engine has been changed. Has to reset boots, see below */ +void +snmpv3_engine_id_changed(void) +{ + snmpv3_set_engine_boots(0); +} + +/** According to RFC3414 2.2.2. + * + * The number of times that the SNMP engine has + * (re-)initialized itself since snmpEngineID + * was last configured. + */ +u32_t +snmpv3_get_engine_boots_internal(void) +{ + if (snmpv3_get_engine_boots() == 0 || + snmpv3_get_engine_boots() < SNMP_MAX_TIME_BOOT) { + return snmpv3_get_engine_boots(); + } + + snmpv3_set_engine_boots(SNMP_MAX_TIME_BOOT); + return snmpv3_get_engine_boots(); +} + +/** RFC3414 2.2.2. + * + * Once the timer reaches 2147483647 it gets reset to zero and the + * engine boot ups get incremented. + */ +u32_t +snmpv3_get_engine_time_internal(void) +{ + if (snmpv3_get_engine_time() >= SNMP_MAX_TIME_BOOT) { + snmpv3_reset_engine_time(); + + if (snmpv3_get_engine_boots() < SNMP_MAX_TIME_BOOT - 1) { + snmpv3_set_engine_boots(snmpv3_get_engine_boots() + 1); + } else { + snmpv3_set_engine_boots(SNMP_MAX_TIME_BOOT); + } + } + + return snmpv3_get_engine_time(); +} + +#if LWIP_SNMP_V3_CRYPTO + +/* This function ignores the byte order suggestion in RFC3414 + * since it simply doesn't influence the effectiveness of an IV. + * + * Implementing RFC3826 priv param algorithm if LWIP_RAND is available. + * + * @todo: This is a potential thread safety issue. + */ +err_t +snmpv3_build_priv_param(u8_t* priv_param) +{ +#ifdef LWIP_RAND /* Based on RFC3826 */ + static u8_t init; + static u32_t priv1, priv2; + + /* Lazy initialisation */ + if (init == 0) { + init = 1; + priv1 = LWIP_RAND(); + priv2 = LWIP_RAND(); + } + + SMEMCPY(&priv_param[0], &priv1, sizeof(priv1)); + SMEMCPY(&priv_param[4], &priv2, sizeof(priv2)); + + /* Emulate 64bit increment */ + priv1++; + if (!priv1) { /* Overflow */ + priv2++; + } +#else /* Based on RFC3414 */ + static u32_t ctr; + u32_t boots = LWIP_SNMPV3_GET_ENGINE_BOOTS(); + SMEMCPY(&priv_param[0], &boots, 4); + SMEMCPY(&priv_param[4], &ctr, 4); + ctr++; +#endif + return ERR_OK; +} +#endif /* LWIP_SNMP_V3_CRYPTO */ + +#endif diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmpv3_dummy.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmpv3_dummy.c new file mode 100644 index 0000000..bdfe844 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmpv3_dummy.c @@ -0,0 +1,145 @@ +/** + * @file + * Dummy SNMPv3 functions. + */ + +/* + * Copyright (c) 2016 Elias Oenal. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Elias Oenal <lwip@eliasoenal.com> + * Dirk Ziegelmeier <dirk@ziegelmeier.net> + */ + +#include "lwip/apps/snmpv3.h" +#include "snmpv3_priv.h" +#include <string.h> +#include "lwip/err.h" + +#if LWIP_SNMP && LWIP_SNMP_V3 + +/** + * @param username is a pointer to a string. + * @param auth_algo is a pointer to u8_t. The implementation has to set this if user was found. + * @param auth_key is a pointer to a pointer to a string. Implementation has to set this if user was found. + * @param priv_algo is a pointer to u8_t. The implementation has to set this if user was found. + * @param priv_key is a pointer to a pointer to a string. Implementation has to set this if user was found. + */ +err_t +snmpv3_get_user(const char* username, u8_t *auth_algo, u8_t *auth_key, u8_t *priv_algo, u8_t *priv_key) +{ + const char* engine_id; + u8_t engine_id_len; + + if(strlen(username) == 0) { + return ERR_OK; + } + + if(memcmp(username, "lwip", 4) != 0) { + return ERR_VAL; + } + + snmpv3_get_engine_id(&engine_id, &engine_id_len); + + if(auth_key != NULL) { + snmpv3_password_to_key_sha((const u8_t*)"maplesyrup", 10, + (const u8_t*)engine_id, engine_id_len, + auth_key); + *auth_algo = SNMP_V3_AUTH_ALGO_SHA; + } + if(priv_key != NULL) { + snmpv3_password_to_key_sha((const u8_t*)"maplesyrup", 10, + (const u8_t*)engine_id, engine_id_len, + priv_key); + *priv_algo = SNMP_V3_PRIV_ALGO_DES; + } + return ERR_OK; +} + +/** + * Get engine ID from persistence + * @param id + * @param len + */ +void +snmpv3_get_engine_id(const char **id, u8_t *len) +{ + *id = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02"; + *len = 12; +} + +/** + * Store engine ID in persistence + * @param id + * @param len + */ +err_t +snmpv3_set_engine_id(const char *id, u8_t len) +{ + LWIP_UNUSED_ARG(id); + LWIP_UNUSED_ARG(len); + return ERR_OK; +} + +/** + * Get engine boots from persistence. Must be increased on each boot. + * @return + */ +u32_t +snmpv3_get_engine_boots(void) +{ + return 0; +} + +/** + * Store engine boots in persistence + * @param boots + */ +void +snmpv3_set_engine_boots(u32_t boots) +{ + LWIP_UNUSED_ARG(boots); +} + +/** + * RFC3414 2.2.2. + * Once the timer reaches 2147483647 it gets reset to zero and the + * engine boot ups get incremented. + */ +u32_t +snmpv3_get_engine_time(void) +{ + return 0; +} + +/** + * Reset current engine time to 0 + */ +void +snmpv3_reset_engine_time(void) +{ +} + +#endif /* LWIP_SNMP && LWIP_SNMP_V3 */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmpv3_mbedtls.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmpv3_mbedtls.c new file mode 100644 index 0000000..0b1eefb --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmpv3_mbedtls.c @@ -0,0 +1,331 @@ +/** + * @file + * SNMPv3 crypto/auth functions implemented for ARM mbedtls. + */ + +/* + * Copyright (c) 2016 Elias Oenal and Dirk Ziegelmeier. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Elias Oenal <lwip@eliasoenal.com> + * Dirk Ziegelmeier <dirk@ziegelmeier.net> + */ + +#include "lwip/apps/snmpv3.h" +#include "snmpv3_priv.h" +#include "lwip/arch.h" +#include "snmp_msg.h" +#include "lwip/sys.h" +#include <string.h> + +#if LWIP_SNMP && LWIP_SNMP_V3 && LWIP_SNMP_V3_MBEDTLS + +#include "mbedtls/md.h" +#include "mbedtls/cipher.h" + +#include "mbedtls/md5.h" +#include "mbedtls/sha1.h" + +err_t +snmpv3_auth(struct snmp_pbuf_stream* stream, u16_t length, + const u8_t* key, u8_t algo, u8_t* hmac_out) +{ + u32_t i; + u8_t key_len; + const mbedtls_md_info_t *md_info; + mbedtls_md_context_t ctx; + struct snmp_pbuf_stream read_stream; + snmp_pbuf_stream_init(&read_stream, stream->pbuf, stream->offset, stream->length); + + if (algo == SNMP_V3_AUTH_ALGO_MD5) { + md_info = mbedtls_md_info_from_type(MBEDTLS_MD_MD5); + key_len = SNMP_V3_MD5_LEN; + } else if (algo == SNMP_V3_AUTH_ALGO_SHA) { + md_info = mbedtls_md_info_from_type(MBEDTLS_MD_SHA1); + key_len = SNMP_V3_SHA_LEN; + } else { + return ERR_ARG; + } + + mbedtls_md_init(&ctx); + if(mbedtls_md_setup(&ctx, md_info, 1) != 0) { + return ERR_ARG; + } + + if (mbedtls_md_hmac_starts(&ctx, key, key_len) != 0) { + goto free_md; + } + + for (i = 0; i < length; i++) { + u8_t byte; + + if (snmp_pbuf_stream_read(&read_stream, &byte)) { + goto free_md; + } + + if (mbedtls_md_hmac_update(&ctx, &byte, 1) != 0) { + goto free_md; + } + } + + if (mbedtls_md_hmac_finish(&ctx, hmac_out) != 0) { + goto free_md; + } + + mbedtls_md_free(&ctx); + return ERR_OK; + +free_md: + mbedtls_md_free(&ctx); + return ERR_ARG; +} + +#if LWIP_SNMP_V3_CRYPTO + +err_t +snmpv3_crypt(struct snmp_pbuf_stream* stream, u16_t length, + const u8_t* key, const u8_t* priv_param, const u32_t engine_boots, + const u32_t engine_time, u8_t algo, u8_t mode) +{ + size_t i; + mbedtls_cipher_context_t ctx; + const mbedtls_cipher_info_t *cipher_info; + + struct snmp_pbuf_stream read_stream; + struct snmp_pbuf_stream write_stream; + snmp_pbuf_stream_init(&read_stream, stream->pbuf, stream->offset, stream->length); + snmp_pbuf_stream_init(&write_stream, stream->pbuf, stream->offset, stream->length); + mbedtls_cipher_init(&ctx); + + if (algo == SNMP_V3_PRIV_ALGO_DES) { + u8_t iv_local[8]; + u8_t out_bytes[8]; + size_t out_len; + + /* RFC 3414 mandates padding for DES */ + if ((length & 0x07) != 0) { + return ERR_ARG; + } + + cipher_info = mbedtls_cipher_info_from_type(MBEDTLS_CIPHER_DES_CBC); + if(mbedtls_cipher_setup(&ctx, cipher_info) != 0) { + return ERR_ARG; + } + if(mbedtls_cipher_set_padding_mode(&ctx, MBEDTLS_PADDING_NONE) != 0) { + return ERR_ARG; + } + if(mbedtls_cipher_setkey(&ctx, key, 8*8, (mode == SNMP_V3_PRIV_MODE_ENCRYPT)? MBEDTLS_ENCRYPT : MBEDTLS_DECRYPT) != 0) { + goto error; + } + + /* Prepare IV */ + for (i = 0; i < LWIP_ARRAYSIZE(iv_local); i++) { + iv_local[i] = priv_param[i] ^ key[i + 8]; + } + if(mbedtls_cipher_set_iv(&ctx, iv_local, LWIP_ARRAYSIZE(iv_local)) != 0) { + goto error; + } + + for (i = 0; i < length; i += 8) { + size_t j; + u8_t in_bytes[8]; + out_len = LWIP_ARRAYSIZE(out_bytes) ; + + for (j = 0; j < LWIP_ARRAYSIZE(in_bytes); j++) { + snmp_pbuf_stream_read(&read_stream, &in_bytes[j]); + } + + if(mbedtls_cipher_update(&ctx, in_bytes, LWIP_ARRAYSIZE(in_bytes), out_bytes, &out_len) != 0) { + goto error; + } + + snmp_pbuf_stream_writebuf(&write_stream, out_bytes, out_len); + } + + out_len = LWIP_ARRAYSIZE(out_bytes); + if(mbedtls_cipher_finish(&ctx, out_bytes, &out_len) != 0) { + goto error; + } + snmp_pbuf_stream_writebuf(&write_stream, out_bytes, out_len); + } else if (algo == SNMP_V3_PRIV_ALGO_AES) { + u8_t iv_local[16]; + + cipher_info = mbedtls_cipher_info_from_type(MBEDTLS_CIPHER_AES_128_CFB128); + if(mbedtls_cipher_setup(&ctx, cipher_info) != 0) { + return ERR_ARG; + } + if(mbedtls_cipher_setkey(&ctx, key, 16*8, (mode == SNMP_V3_PRIV_MODE_ENCRYPT)? MBEDTLS_ENCRYPT : MBEDTLS_DECRYPT) != 0) { + goto error; + } + + /* + * IV is the big endian concatenation of boots, + * uptime and priv param - see RFC3826. + */ + iv_local[0 + 0] = (engine_boots >> 24) & 0xFF; + iv_local[0 + 1] = (engine_boots >> 16) & 0xFF; + iv_local[0 + 2] = (engine_boots >> 8) & 0xFF; + iv_local[0 + 3] = (engine_boots >> 0) & 0xFF; + iv_local[4 + 0] = (engine_time >> 24) & 0xFF; + iv_local[4 + 1] = (engine_time >> 16) & 0xFF; + iv_local[4 + 2] = (engine_time >> 8) & 0xFF; + iv_local[4 + 3] = (engine_time >> 0) & 0xFF; + SMEMCPY(iv_local + 8, priv_param, 8); + if(mbedtls_cipher_set_iv(&ctx, iv_local, LWIP_ARRAYSIZE(iv_local)) != 0) { + goto error; + } + + for (i = 0; i < length; i++) { + u8_t in_byte; + u8_t out_byte; + size_t out_len = sizeof(out_byte); + + snmp_pbuf_stream_read(&read_stream, &in_byte); + if(mbedtls_cipher_update(&ctx, &in_byte, sizeof(in_byte), &out_byte, &out_len) != 0) { + goto error; + } + snmp_pbuf_stream_write(&write_stream, out_byte); + } + } else { + return ERR_ARG; + } + + mbedtls_cipher_free(&ctx); + return ERR_OK; + +error: + mbedtls_cipher_free(&ctx); + return ERR_OK; +} + +#endif /* LWIP_SNMP_V3_CRYPTO */ + +/* A.2.1. Password to Key Sample Code for MD5 */ +void +snmpv3_password_to_key_md5( + const u8_t *password, /* IN */ + u8_t passwordlen, /* IN */ + const u8_t *engineID, /* IN - pointer to snmpEngineID */ + u8_t engineLength,/* IN - length of snmpEngineID */ + u8_t *key) /* OUT - pointer to caller 16-octet buffer */ +{ + mbedtls_md5_context MD; + u8_t *cp, password_buf[64]; + u32_t password_index = 0; + u8_t i; + u32_t count = 0; + + mbedtls_md5_init(&MD); /* initialize MD5 */ + mbedtls_md5_starts(&MD); + + /**********************************************/ + /* Use while loop until we've done 1 Megabyte */ + /**********************************************/ + while (count < 1048576) { + cp = password_buf; + for (i = 0; i < 64; i++) { + /*************************************************/ + /* Take the next octet of the password, wrapping */ + /* to the beginning of the password as necessary.*/ + /*************************************************/ + *cp++ = password[password_index++ % passwordlen]; + } + mbedtls_md5_update(&MD, password_buf, 64); + count += 64; + } + mbedtls_md5_finish(&MD, key); /* tell MD5 we're done */ + + /*****************************************************/ + /* Now localize the key with the engineID and pass */ + /* through MD5 to produce final key */ + /* May want to ensure that engineLength <= 32, */ + /* otherwise need to use a buffer larger than 64 */ + /*****************************************************/ + SMEMCPY(password_buf, key, 16); + MEMCPY(password_buf + 16, engineID, engineLength); + SMEMCPY(password_buf + 16 + engineLength, key, 16); + + mbedtls_md5_starts(&MD); + mbedtls_md5_update(&MD, password_buf, 32 + engineLength); + mbedtls_md5_finish(&MD, key); + + mbedtls_md5_free(&MD); + return; +} + +/* A.2.2. Password to Key Sample Code for SHA */ +void +snmpv3_password_to_key_sha( + const u8_t *password, /* IN */ + u8_t passwordlen, /* IN */ + const u8_t *engineID, /* IN - pointer to snmpEngineID */ + u8_t engineLength,/* IN - length of snmpEngineID */ + u8_t *key) /* OUT - pointer to caller 20-octet buffer */ +{ + mbedtls_sha1_context SH; + u8_t *cp, password_buf[72]; + u32_t password_index = 0; + u8_t i; + u32_t count = 0; + + mbedtls_sha1_init(&SH); /* initialize SHA */ + mbedtls_sha1_starts(&SH); + + /**********************************************/ + /* Use while loop until we've done 1 Megabyte */ + /**********************************************/ + while (count < 1048576) { + cp = password_buf; + for (i = 0; i < 64; i++) { + /*************************************************/ + /* Take the next octet of the password, wrapping */ + /* to the beginning of the password as necessary.*/ + /*************************************************/ + *cp++ = password[password_index++ % passwordlen]; + } + mbedtls_sha1_update(&SH, password_buf, 64); + count += 64; + } + mbedtls_sha1_finish(&SH, key); /* tell SHA we're done */ + + /*****************************************************/ + /* Now localize the key with the engineID and pass */ + /* through SHA to produce final key */ + /* May want to ensure that engineLength <= 32, */ + /* otherwise need to use a buffer larger than 72 */ + /*****************************************************/ + SMEMCPY(password_buf, key, 20); + MEMCPY(password_buf + 20, engineID, engineLength); + SMEMCPY(password_buf + 20 + engineLength, key, 20); + + mbedtls_sha1_starts(&SH); + mbedtls_sha1_update(&SH, password_buf, 40 + engineLength); + mbedtls_sha1_finish(&SH, key); + + mbedtls_sha1_free(&SH); + return; +} + +#endif /* LWIP_SNMP && LWIP_SNMP_V3 && LWIP_SNMP_V3_MBEDTLS */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmpv3_priv.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmpv3_priv.h new file mode 100644 index 0000000..b87666d --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/apps/snmp/snmpv3_priv.h @@ -0,0 +1,66 @@ +/** + * @file + * Additional SNMPv3 functionality RFC3414 and RFC3826 (internal API, do not use in client code). + */ + +/* + * Copyright (c) 2016 Elias Oenal. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * Author: Elias Oenal <lwip@eliasoenal.com> + */ + +#ifndef LWIP_HDR_APPS_SNMP_V3_PRIV_H +#define LWIP_HDR_APPS_SNMP_V3_PRIV_H + +#include "lwip/apps/snmp_opts.h" + +#if LWIP_SNMP && LWIP_SNMP_V3 + +#include "snmp_pbuf_stream.h" + +/* According to RFC 3411 */ +#define SNMP_V3_MAX_ENGINE_ID_LENGTH 32 +#define SNMP_V3_MAX_USER_LENGTH 32 + +#define SNMP_V3_MAX_AUTH_PARAM_LENGTH 12 +#define SNMP_V3_MAX_PRIV_PARAM_LENGTH 8 + +#define SNMP_V3_AUTH_FLAG 0x01 +#define SNMP_V3_PRIV_FLAG 0x02 + +#define SNMP_V3_MD5_LEN 16 +#define SNMP_V3_SHA_LEN 20 + +u32_t snmpv3_get_engine_boots_internal(void); +u32_t snmpv3_get_engine_time_internal(void); +err_t snmpv3_auth(struct snmp_pbuf_stream* stream, u16_t length, const u8_t* key, u8_t algo, u8_t* hmac_out); +err_t snmpv3_crypt(struct snmp_pbuf_stream* stream, u16_t length, const u8_t* key, + const u8_t* priv_param, const u32_t engine_boots, const u32_t engine_time, u8_t algo, u8_t mode); +err_t snmpv3_build_priv_param(u8_t* priv_param); + +#endif + +#endif /* LWIP_HDR_APPS_SNMP_V3_PRIV_H */ |