diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/include/lwip/prot/tcp.h')
-rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/include/lwip/prot/tcp.h | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/include/lwip/prot/tcp.h b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/include/lwip/prot/tcp.h new file mode 100644 index 0000000..67fe7b9 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/include/lwip/prot/tcp.h @@ -0,0 +1,97 @@ +/** + * @file + * TCP protocol definitions + */ + +/* + * 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: Adam Dunkels <adam@sics.se> + * + */ +#ifndef LWIP_HDR_PROT_TCP_H +#define LWIP_HDR_PROT_TCP_H + +#include "lwip/arch.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/* Length of the TCP header, excluding options. */ +#define TCP_HLEN 20 + +/* Fields are (of course) in network byte order. + * Some fields are converted to host byte order in tcp_input(). + */ +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +struct tcp_hdr { + PACK_STRUCT_FIELD(u16_t src); + PACK_STRUCT_FIELD(u16_t dest); + PACK_STRUCT_FIELD(u32_t seqno); + PACK_STRUCT_FIELD(u32_t ackno); + PACK_STRUCT_FIELD(u16_t _hdrlen_rsvd_flags); + PACK_STRUCT_FIELD(u16_t wnd); + PACK_STRUCT_FIELD(u16_t chksum); + PACK_STRUCT_FIELD(u16_t urgp); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + +/* TCP header flags bits */ +#define TCP_FIN 0x01U +#define TCP_SYN 0x02U +#define TCP_RST 0x04U +#define TCP_PSH 0x08U +#define TCP_ACK 0x10U +#define TCP_URG 0x20U +#define TCP_ECE 0x40U +#define TCP_CWR 0x80U +/* Valid TCP header flags */ +#define TCP_FLAGS 0x3fU + +#define TCPH_HDRLEN(phdr) ((u16_t)(lwip_ntohs((phdr)->_hdrlen_rsvd_flags) >> 12)) +#define TCPH_FLAGS(phdr) ((u16_t)(lwip_ntohs((phdr)->_hdrlen_rsvd_flags) & TCP_FLAGS)) + +#define TCPH_HDRLEN_SET(phdr, len) (phdr)->_hdrlen_rsvd_flags = lwip_htons(((len) << 12) | TCPH_FLAGS(phdr)) +#define TCPH_FLAGS_SET(phdr, flags) (phdr)->_hdrlen_rsvd_flags = (((phdr)->_hdrlen_rsvd_flags & PP_HTONS(~TCP_FLAGS)) | lwip_htons(flags)) +#define TCPH_HDRLEN_FLAGS_SET(phdr, len, flags) (phdr)->_hdrlen_rsvd_flags = (u16_t)(lwip_htons((u16_t)((len) << 12) | (flags))) + +#define TCPH_SET_FLAG(phdr, flags ) (phdr)->_hdrlen_rsvd_flags = ((phdr)->_hdrlen_rsvd_flags | lwip_htons(flags)) +#define TCPH_UNSET_FLAG(phdr, flags) (phdr)->_hdrlen_rsvd_flags = ((phdr)->_hdrlen_rsvd_flags & ~lwip_htons(flags)) + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PROT_TCP_H */ |