diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api')
9 files changed, 7713 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/api_lib.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/api_lib.c new file mode 100644 index 0000000..3c1d6a6 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/api_lib.c @@ -0,0 +1,1010 @@ +/** + * @file + * Sequential API External module + * + * @defgroup netconn Netconn API + * @ingroup sequential_api + * Thread-safe, to be called from non-TCPIP threads only. + * TX/RX handling based on @ref netbuf (containing @ref pbuf) + * to avoid copying data around. + * + * @defgroup netconn_common Common functions + * @ingroup netconn + * For use with TCP and UDP + * + * @defgroup netconn_tcp TCP only + * @ingroup netconn + * TCP only functions + * + * @defgroup netconn_udp UDP only + * @ingroup netconn + * UDP only functions + */ + +/* + * 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> + */ + +/* This is the part of the API that is linked with + the application */ + +#include "lwip/opt.h" + +#if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/api.h" +#include "lwip/memp.h" + +#include "lwip/ip.h" +#include "lwip/raw.h" +#include "lwip/udp.h" +#include "lwip/priv/api_msg.h" +#include "lwip/priv/tcp_priv.h" +#include "lwip/priv/tcpip_priv.h" + +#include <string.h> + +#define API_MSG_VAR_REF(name) API_VAR_REF(name) +#define API_MSG_VAR_DECLARE(name) API_VAR_DECLARE(struct api_msg, name) +#define API_MSG_VAR_ALLOC(name) API_VAR_ALLOC(struct api_msg, MEMP_API_MSG, name, ERR_MEM) +#define API_MSG_VAR_ALLOC_RETURN_NULL(name) API_VAR_ALLOC(struct api_msg, MEMP_API_MSG, name, NULL) +#define API_MSG_VAR_FREE(name) API_VAR_FREE(MEMP_API_MSG, name) + +static err_t netconn_close_shutdown(struct netconn *conn, u8_t how); + +/** + * Call the lower part of a netconn_* function + * This function is then running in the thread context + * of tcpip_thread and has exclusive access to lwIP core code. + * + * @param fn function to call + * @param apimsg a struct containing the function to call and its parameters + * @return ERR_OK if the function was called, another err_t if not + */ +static err_t +netconn_apimsg(tcpip_callback_fn fn, struct api_msg *apimsg) +{ + err_t err; + +#ifdef LWIP_DEBUG + /* catch functions that don't set err */ + apimsg->err = ERR_VAL; +#endif /* LWIP_DEBUG */ + +#if LWIP_NETCONN_SEM_PER_THREAD + apimsg->op_completed_sem = LWIP_NETCONN_THREAD_SEM_GET(); +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + + err = tcpip_send_msg_wait_sem(fn, apimsg, LWIP_API_MSG_SEM(apimsg)); + if (err == ERR_OK) { + return apimsg->err; + } + return err; +} + +/** + * Create a new netconn (of a specific type) that has a callback function. + * The corresponding pcb is also created. + * + * @param t the type of 'connection' to create (@see enum netconn_type) + * @param proto the IP protocol for RAW IP pcbs + * @param callback a function to call on status changes (RX available, TX'ed) + * @return a newly allocated struct netconn or + * NULL on memory error + */ +struct netconn* +netconn_new_with_proto_and_callback(enum netconn_type t, u8_t proto, netconn_callback callback) +{ + struct netconn *conn; + API_MSG_VAR_DECLARE(msg); + API_MSG_VAR_ALLOC_RETURN_NULL(msg); + + conn = netconn_alloc(t, callback); + if (conn != NULL) { + err_t err; + + API_MSG_VAR_REF(msg).msg.n.proto = proto; + API_MSG_VAR_REF(msg).conn = conn; + err = netconn_apimsg(lwip_netconn_do_newconn, &API_MSG_VAR_REF(msg)); + if (err != ERR_OK) { + LWIP_ASSERT("freeing conn without freeing pcb", conn->pcb.tcp == NULL); + LWIP_ASSERT("conn has no recvmbox", sys_mbox_valid(&conn->recvmbox)); +#if LWIP_TCP + LWIP_ASSERT("conn->acceptmbox shouldn't exist", !sys_mbox_valid(&conn->acceptmbox)); +#endif /* LWIP_TCP */ +#if !LWIP_NETCONN_SEM_PER_THREAD + LWIP_ASSERT("conn has no op_completed", sys_sem_valid(&conn->op_completed)); + sys_sem_free(&conn->op_completed); +#endif /* !LWIP_NETCONN_SEM_PER_THREAD */ + sys_mbox_free(&conn->recvmbox); + memp_free(MEMP_NETCONN, conn); + API_MSG_VAR_FREE(msg); + return NULL; + } + } + API_MSG_VAR_FREE(msg); + return conn; +} + +/** + * @ingroup netconn_common + * Close a netconn 'connection' and free its resources. + * UDP and RAW connection are completely closed, TCP pcbs might still be in a waitstate + * after this returns. + * + * @param conn the netconn to delete + * @return ERR_OK if the connection was deleted + */ +err_t +netconn_delete(struct netconn *conn) +{ + err_t err; + API_MSG_VAR_DECLARE(msg); + + /* No ASSERT here because possible to get a (conn == NULL) if we got an accept error */ + if (conn == NULL) { + return ERR_OK; + } + + API_MSG_VAR_ALLOC(msg); + API_MSG_VAR_REF(msg).conn = conn; +#if LWIP_SO_SNDTIMEO || LWIP_SO_LINGER + /* get the time we started, which is later compared to + sys_now() + conn->send_timeout */ + API_MSG_VAR_REF(msg).msg.sd.time_started = sys_now(); +#else /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */ +#if LWIP_TCP + API_MSG_VAR_REF(msg).msg.sd.polls_left = + ((LWIP_TCP_CLOSE_TIMEOUT_MS_DEFAULT + TCP_SLOW_INTERVAL - 1) / TCP_SLOW_INTERVAL) + 1; +#endif /* LWIP_TCP */ +#endif /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */ + err = netconn_apimsg(lwip_netconn_do_delconn, &API_MSG_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); + + if (err != ERR_OK) { + return err; + } + + netconn_free(conn); + + return ERR_OK; +} + +/** + * Get the local or remote IP address and port of a netconn. + * For RAW netconns, this returns the protocol instead of a port! + * + * @param conn the netconn to query + * @param addr a pointer to which to save the IP address + * @param port a pointer to which to save the port (or protocol for RAW) + * @param local 1 to get the local IP address, 0 to get the remote one + * @return ERR_CONN for invalid connections + * ERR_OK if the information was retrieved + */ +err_t +netconn_getaddr(struct netconn *conn, ip_addr_t *addr, u16_t *port, u8_t local) +{ + API_MSG_VAR_DECLARE(msg); + err_t err; + + LWIP_ERROR("netconn_getaddr: invalid conn", (conn != NULL), return ERR_ARG;); + LWIP_ERROR("netconn_getaddr: invalid addr", (addr != NULL), return ERR_ARG;); + LWIP_ERROR("netconn_getaddr: invalid port", (port != NULL), return ERR_ARG;); + + API_MSG_VAR_ALLOC(msg); + API_MSG_VAR_REF(msg).conn = conn; + API_MSG_VAR_REF(msg).msg.ad.local = local; +#if LWIP_MPU_COMPATIBLE + err = netconn_apimsg(lwip_netconn_do_getaddr, &API_MSG_VAR_REF(msg)); + *addr = msg->msg.ad.ipaddr; + *port = msg->msg.ad.port; +#else /* LWIP_MPU_COMPATIBLE */ + msg.msg.ad.ipaddr = addr; + msg.msg.ad.port = port; + err = netconn_apimsg(lwip_netconn_do_getaddr, &msg); +#endif /* LWIP_MPU_COMPATIBLE */ + API_MSG_VAR_FREE(msg); + + return err; +} + +/** + * @ingroup netconn_common + * Bind a netconn to a specific local IP address and port. + * Binding one netconn twice might not always be checked correctly! + * + * @param conn the netconn to bind + * @param addr the local IP address to bind the netconn to + * (use IP4_ADDR_ANY/IP6_ADDR_ANY to bind to all addresses) + * @param port the local port to bind the netconn to (not used for RAW) + * @return ERR_OK if bound, any other err_t on failure + */ +err_t +netconn_bind(struct netconn *conn, const ip_addr_t *addr, u16_t port) +{ + API_MSG_VAR_DECLARE(msg); + err_t err; + + LWIP_ERROR("netconn_bind: invalid conn", (conn != NULL), return ERR_ARG;); + +#if LWIP_IPV4 + /* Don't propagate NULL pointer (IP_ADDR_ANY alias) to subsequent functions */ + if (addr == NULL) { + addr = IP4_ADDR_ANY; + } +#endif /* LWIP_IPV4 */ + +#if LWIP_IPV4 && LWIP_IPV6 + /* "Socket API like" dual-stack support: If IP to bind to is IP6_ADDR_ANY, + * and NETCONN_FLAG_IPV6_V6ONLY is 0, use IP_ANY_TYPE to bind + */ + if ((netconn_get_ipv6only(conn) == 0) && + ip_addr_cmp(addr, IP6_ADDR_ANY)) { + addr = IP_ANY_TYPE; + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + + API_MSG_VAR_ALLOC(msg); + API_MSG_VAR_REF(msg).conn = conn; + API_MSG_VAR_REF(msg).msg.bc.ipaddr = API_MSG_VAR_REF(addr); + API_MSG_VAR_REF(msg).msg.bc.port = port; + err = netconn_apimsg(lwip_netconn_do_bind, &API_MSG_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); + + return err; +} + +/** + * @ingroup netconn_common + * Connect a netconn to a specific remote IP address and port. + * + * @param conn the netconn to connect + * @param addr the remote IP address to connect to + * @param port the remote port to connect to (no used for RAW) + * @return ERR_OK if connected, return value of tcp_/udp_/raw_connect otherwise + */ +err_t +netconn_connect(struct netconn *conn, const ip_addr_t *addr, u16_t port) +{ + API_MSG_VAR_DECLARE(msg); + err_t err; + + LWIP_ERROR("netconn_connect: invalid conn", (conn != NULL), return ERR_ARG;); + +#if LWIP_IPV4 + /* Don't propagate NULL pointer (IP_ADDR_ANY alias) to subsequent functions */ + if (addr == NULL) { + addr = IP4_ADDR_ANY; + } +#endif /* LWIP_IPV4 */ + + API_MSG_VAR_ALLOC(msg); + API_MSG_VAR_REF(msg).conn = conn; + API_MSG_VAR_REF(msg).msg.bc.ipaddr = API_MSG_VAR_REF(addr); + API_MSG_VAR_REF(msg).msg.bc.port = port; + err = netconn_apimsg(lwip_netconn_do_connect, &API_MSG_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); + + return err; +} + +/** + * @ingroup netconn_udp + * Disconnect a netconn from its current peer (only valid for UDP netconns). + * + * @param conn the netconn to disconnect + * @return See @ref err_t + */ +err_t +netconn_disconnect(struct netconn *conn) +{ + API_MSG_VAR_DECLARE(msg); + err_t err; + + LWIP_ERROR("netconn_disconnect: invalid conn", (conn != NULL), return ERR_ARG;); + + API_MSG_VAR_ALLOC(msg); + API_MSG_VAR_REF(msg).conn = conn; + err = netconn_apimsg(lwip_netconn_do_disconnect, &API_MSG_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); + + return err; +} + +/** + * @ingroup netconn_tcp + * Set a TCP netconn into listen mode + * + * @param conn the tcp netconn to set to listen mode + * @param backlog the listen backlog, only used if TCP_LISTEN_BACKLOG==1 + * @return ERR_OK if the netconn was set to listen (UDP and RAW netconns + * don't return any error (yet?)) + */ +err_t +netconn_listen_with_backlog(struct netconn *conn, u8_t backlog) +{ +#if LWIP_TCP + API_MSG_VAR_DECLARE(msg); + err_t err; + + /* This does no harm. If TCP_LISTEN_BACKLOG is off, backlog is unused. */ + LWIP_UNUSED_ARG(backlog); + + LWIP_ERROR("netconn_listen: invalid conn", (conn != NULL), return ERR_ARG;); + + API_MSG_VAR_ALLOC(msg); + API_MSG_VAR_REF(msg).conn = conn; +#if TCP_LISTEN_BACKLOG + API_MSG_VAR_REF(msg).msg.lb.backlog = backlog; +#endif /* TCP_LISTEN_BACKLOG */ + err = netconn_apimsg(lwip_netconn_do_listen, &API_MSG_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); + + return err; +#else /* LWIP_TCP */ + LWIP_UNUSED_ARG(conn); + LWIP_UNUSED_ARG(backlog); + return ERR_ARG; +#endif /* LWIP_TCP */ +} + +/** + * @ingroup netconn_tcp + * Accept a new connection on a TCP listening netconn. + * + * @param conn the TCP listen netconn + * @param new_conn pointer where the new connection is stored + * @return ERR_OK if a new connection has been received or an error + * code otherwise + */ +err_t +netconn_accept(struct netconn *conn, struct netconn **new_conn) +{ +#if LWIP_TCP + void *accept_ptr; + struct netconn *newconn; +#if TCP_LISTEN_BACKLOG + API_MSG_VAR_DECLARE(msg); +#endif /* TCP_LISTEN_BACKLOG */ + + LWIP_ERROR("netconn_accept: invalid pointer", (new_conn != NULL), return ERR_ARG;); + *new_conn = NULL; + LWIP_ERROR("netconn_accept: invalid conn", (conn != NULL), return ERR_ARG;); + + if (ERR_IS_FATAL(conn->last_err)) { + /* don't recv on fatal errors: this might block the application task + waiting on acceptmbox forever! */ + return conn->last_err; + } + if (!sys_mbox_valid(&conn->acceptmbox)) { + return ERR_CLSD; + } + +#if TCP_LISTEN_BACKLOG + API_MSG_VAR_ALLOC(msg); +#endif /* TCP_LISTEN_BACKLOG */ + +#if LWIP_SO_RCVTIMEO + if (sys_arch_mbox_fetch(&conn->acceptmbox, &accept_ptr, conn->recv_timeout) == SYS_ARCH_TIMEOUT) { +#if TCP_LISTEN_BACKLOG + API_MSG_VAR_FREE(msg); +#endif /* TCP_LISTEN_BACKLOG */ + return ERR_TIMEOUT; + } +#else + sys_arch_mbox_fetch(&conn->acceptmbox, &accept_ptr, 0); +#endif /* LWIP_SO_RCVTIMEO*/ + newconn = (struct netconn *)accept_ptr; + /* Register event with callback */ + API_EVENT(conn, NETCONN_EVT_RCVMINUS, 0); + + if (accept_ptr == &netconn_aborted) { + /* a connection has been aborted: out of pcbs or out of netconns during accept */ + /* @todo: set netconn error, but this would be fatal and thus block further accepts */ +#if TCP_LISTEN_BACKLOG + API_MSG_VAR_FREE(msg); +#endif /* TCP_LISTEN_BACKLOG */ + return ERR_ABRT; + } + if (newconn == NULL) { + /* connection has been aborted */ + /* in this special case, we set the netconn error from application thread, as + on a ready-to-accept listening netconn, there should not be anything running + in tcpip_thread */ + NETCONN_SET_SAFE_ERR(conn, ERR_CLSD); +#if TCP_LISTEN_BACKLOG + API_MSG_VAR_FREE(msg); +#endif /* TCP_LISTEN_BACKLOG */ + return ERR_CLSD; + } +#if TCP_LISTEN_BACKLOG + /* Let the stack know that we have accepted the connection. */ + API_MSG_VAR_REF(msg).conn = newconn; + /* don't care for the return value of lwip_netconn_do_recv */ + netconn_apimsg(lwip_netconn_do_accepted, &API_MSG_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); +#endif /* TCP_LISTEN_BACKLOG */ + + *new_conn = newconn; + /* don't set conn->last_err: it's only ERR_OK, anyway */ + return ERR_OK; +#else /* LWIP_TCP */ + LWIP_UNUSED_ARG(conn); + LWIP_UNUSED_ARG(new_conn); + return ERR_ARG; +#endif /* LWIP_TCP */ +} + +/** + * @ingroup netconn_common + * Receive data: actual implementation that doesn't care whether pbuf or netbuf + * is received + * + * @param conn the netconn from which to receive data + * @param new_buf pointer where a new pbuf/netbuf is stored when received data + * @return ERR_OK if data has been received, an error code otherwise (timeout, + * memory error or another error) + */ +static err_t +netconn_recv_data(struct netconn *conn, void **new_buf) +{ + void *buf = NULL; + u16_t len; +#if LWIP_TCP + API_MSG_VAR_DECLARE(msg); +#if LWIP_MPU_COMPATIBLE + msg = NULL; +#endif +#endif /* LWIP_TCP */ + + LWIP_ERROR("netconn_recv: invalid pointer", (new_buf != NULL), return ERR_ARG;); + *new_buf = NULL; + LWIP_ERROR("netconn_recv: invalid conn", (conn != NULL), return ERR_ARG;); +#if LWIP_TCP +#if (LWIP_UDP || LWIP_RAW) + if (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP) +#endif /* (LWIP_UDP || LWIP_RAW) */ + { + if (!sys_mbox_valid(&conn->recvmbox)) { + /* This happens when calling this function after receiving FIN */ + return sys_mbox_valid(&conn->acceptmbox) ? ERR_CONN : ERR_CLSD; + } + } +#endif /* LWIP_TCP */ + LWIP_ERROR("netconn_recv: invalid recvmbox", sys_mbox_valid(&conn->recvmbox), return ERR_CONN;); + + if (ERR_IS_FATAL(conn->last_err)) { + /* don't recv on fatal errors: this might block the application task + waiting on recvmbox forever! */ + /* @todo: this does not allow us to fetch data that has been put into recvmbox + before the fatal error occurred - is that a problem? */ + return conn->last_err; + } +#if LWIP_TCP +#if (LWIP_UDP || LWIP_RAW) + if (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP) +#endif /* (LWIP_UDP || LWIP_RAW) */ + { + API_MSG_VAR_ALLOC(msg); + } +#endif /* LWIP_TCP */ + +#if LWIP_SO_RCVTIMEO + if (sys_arch_mbox_fetch(&conn->recvmbox, &buf, conn->recv_timeout) == SYS_ARCH_TIMEOUT) { +#if LWIP_TCP +#if (LWIP_UDP || LWIP_RAW) + if (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP) +#endif /* (LWIP_UDP || LWIP_RAW) */ + { + API_MSG_VAR_FREE(msg); + } +#endif /* LWIP_TCP */ + return ERR_TIMEOUT; + } +#else + sys_arch_mbox_fetch(&conn->recvmbox, &buf, 0); +#endif /* LWIP_SO_RCVTIMEO*/ + +#if LWIP_TCP +#if (LWIP_UDP || LWIP_RAW) + if (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP) +#endif /* (LWIP_UDP || LWIP_RAW) */ + { + /* Let the stack know that we have taken the data. */ + /* @todo: Speedup: Don't block and wait for the answer here + (to prevent multiple thread-switches). */ + API_MSG_VAR_REF(msg).conn = conn; + if (buf != NULL) { + API_MSG_VAR_REF(msg).msg.r.len = ((struct pbuf *)buf)->tot_len; + } else { + API_MSG_VAR_REF(msg).msg.r.len = 1; + } + + /* don't care for the return value of lwip_netconn_do_recv */ + netconn_apimsg(lwip_netconn_do_recv, &API_MSG_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); + + /* If we are closed, we indicate that we no longer wish to use the socket */ + if (buf == NULL) { + API_EVENT(conn, NETCONN_EVT_RCVMINUS, 0); + if (conn->pcb.ip == NULL) { + /* race condition: RST during recv */ + return conn->last_err == ERR_OK ? ERR_RST : conn->last_err; + } + /* RX side is closed, so deallocate the recvmbox */ + netconn_close_shutdown(conn, NETCONN_SHUT_RD); + /* Don' store ERR_CLSD as conn->err since we are only half-closed */ + return ERR_CLSD; + } + len = ((struct pbuf *)buf)->tot_len; + } +#endif /* LWIP_TCP */ +#if LWIP_TCP && (LWIP_UDP || LWIP_RAW) + else +#endif /* LWIP_TCP && (LWIP_UDP || LWIP_RAW) */ +#if (LWIP_UDP || LWIP_RAW) + { + LWIP_ASSERT("buf != NULL", buf != NULL); + len = netbuf_len((struct netbuf*)buf); + } +#endif /* (LWIP_UDP || LWIP_RAW) */ + +#if LWIP_SO_RCVBUF + SYS_ARCH_DEC(conn->recv_avail, len); +#endif /* LWIP_SO_RCVBUF */ + /* Register event with callback */ + API_EVENT(conn, NETCONN_EVT_RCVMINUS, len); + + LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_recv_data: received %p, len=%"U16_F"\n", buf, len)); + + *new_buf = buf; + /* don't set conn->last_err: it's only ERR_OK, anyway */ + return ERR_OK; +} + +/** + * @ingroup netconn_tcp + * Receive data (in form of a pbuf) from a TCP netconn + * + * @param conn the netconn from which to receive data + * @param new_buf pointer where a new pbuf is stored when received data + * @return ERR_OK if data has been received, an error code otherwise (timeout, + * memory error or another error) + * ERR_ARG if conn is not a TCP netconn + */ +err_t +netconn_recv_tcp_pbuf(struct netconn *conn, struct pbuf **new_buf) +{ + LWIP_ERROR("netconn_recv: invalid conn", (conn != NULL) && + NETCONNTYPE_GROUP(netconn_type(conn)) == NETCONN_TCP, return ERR_ARG;); + + return netconn_recv_data(conn, (void **)new_buf); +} + +/** + * @ingroup netconn_common + * Receive data (in form of a netbuf containing a packet buffer) from a netconn + * + * @param conn the netconn from which to receive data + * @param new_buf pointer where a new netbuf is stored when received data + * @return ERR_OK if data has been received, an error code otherwise (timeout, + * memory error or another error) + */ +err_t +netconn_recv(struct netconn *conn, struct netbuf **new_buf) +{ +#if LWIP_TCP + struct netbuf *buf = NULL; + err_t err; +#endif /* LWIP_TCP */ + + LWIP_ERROR("netconn_recv: invalid pointer", (new_buf != NULL), return ERR_ARG;); + *new_buf = NULL; + LWIP_ERROR("netconn_recv: invalid conn", (conn != NULL), return ERR_ARG;); + +#if LWIP_TCP +#if (LWIP_UDP || LWIP_RAW) + if (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP) +#endif /* (LWIP_UDP || LWIP_RAW) */ + { + struct pbuf *p = NULL; + /* This is not a listening netconn, since recvmbox is set */ + + buf = (struct netbuf *)memp_malloc(MEMP_NETBUF); + if (buf == NULL) { + return ERR_MEM; + } + + err = netconn_recv_data(conn, (void **)&p); + if (err != ERR_OK) { + memp_free(MEMP_NETBUF, buf); + return err; + } + LWIP_ASSERT("p != NULL", p != NULL); + + buf->p = p; + buf->ptr = p; + buf->port = 0; + ip_addr_set_zero(&buf->addr); + *new_buf = buf; + /* don't set conn->last_err: it's only ERR_OK, anyway */ + return ERR_OK; + } +#endif /* LWIP_TCP */ +#if LWIP_TCP && (LWIP_UDP || LWIP_RAW) + else +#endif /* LWIP_TCP && (LWIP_UDP || LWIP_RAW) */ + { +#if (LWIP_UDP || LWIP_RAW) + return netconn_recv_data(conn, (void **)new_buf); +#endif /* (LWIP_UDP || LWIP_RAW) */ + } +} + +/** + * @ingroup netconn_udp + * Send data (in form of a netbuf) to a specific remote IP address and port. + * Only to be used for UDP and RAW netconns (not TCP). + * + * @param conn the netconn over which to send data + * @param buf a netbuf containing the data to send + * @param addr the remote IP address to which to send the data + * @param port the remote port to which to send the data + * @return ERR_OK if data was sent, any other err_t on error + */ +err_t +netconn_sendto(struct netconn *conn, struct netbuf *buf, const ip_addr_t *addr, u16_t port) +{ + if (buf != NULL) { + ip_addr_set(&buf->addr, addr); + buf->port = port; + return netconn_send(conn, buf); + } + return ERR_VAL; +} + +/** + * @ingroup netconn_udp + * Send data over a UDP or RAW netconn (that is already connected). + * + * @param conn the UDP or RAW netconn over which to send data + * @param buf a netbuf containing the data to send + * @return ERR_OK if data was sent, any other err_t on error + */ +err_t +netconn_send(struct netconn *conn, struct netbuf *buf) +{ + API_MSG_VAR_DECLARE(msg); + err_t err; + + LWIP_ERROR("netconn_send: invalid conn", (conn != NULL), return ERR_ARG;); + + LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_send: sending %"U16_F" bytes\n", buf->p->tot_len)); + + API_MSG_VAR_ALLOC(msg); + API_MSG_VAR_REF(msg).conn = conn; + API_MSG_VAR_REF(msg).msg.b = buf; + err = netconn_apimsg(lwip_netconn_do_send, &API_MSG_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); + + return err; +} + +/** + * @ingroup netconn_tcp + * Send data over a TCP netconn. + * + * @param conn the TCP netconn over which to send data + * @param dataptr pointer to the application buffer that contains the data to send + * @param size size of the application data to send + * @param apiflags combination of following flags : + * - NETCONN_COPY: data will be copied into memory belonging to the stack + * - NETCONN_MORE: for TCP connection, PSH flag will be set on last segment sent + * - NETCONN_DONTBLOCK: only write the data if all data can be written at once + * @param bytes_written pointer to a location that receives the number of written bytes + * @return ERR_OK if data was sent, any other err_t on error + */ +err_t +netconn_write_partly(struct netconn *conn, const void *dataptr, size_t size, + u8_t apiflags, size_t *bytes_written) +{ + API_MSG_VAR_DECLARE(msg); + err_t err; + u8_t dontblock; + + LWIP_ERROR("netconn_write: invalid conn", (conn != NULL), return ERR_ARG;); + LWIP_ERROR("netconn_write: invalid conn->type", (NETCONNTYPE_GROUP(conn->type)== NETCONN_TCP), return ERR_VAL;); + if (size == 0) { + return ERR_OK; + } + dontblock = netconn_is_nonblocking(conn) || (apiflags & NETCONN_DONTBLOCK); +#if LWIP_SO_SNDTIMEO + if (conn->send_timeout != 0) { + dontblock = 1; + } +#endif /* LWIP_SO_SNDTIMEO */ + if (dontblock && !bytes_written) { + /* This implies netconn_write() cannot be used for non-blocking send, since + it has no way to return the number of bytes written. */ + return ERR_VAL; + } + + API_MSG_VAR_ALLOC(msg); + /* non-blocking write sends as much */ + API_MSG_VAR_REF(msg).conn = conn; + API_MSG_VAR_REF(msg).msg.w.dataptr = dataptr; + API_MSG_VAR_REF(msg).msg.w.apiflags = apiflags; + API_MSG_VAR_REF(msg).msg.w.len = size; +#if LWIP_SO_SNDTIMEO + if (conn->send_timeout != 0) { + /* get the time we started, which is later compared to + sys_now() + conn->send_timeout */ + API_MSG_VAR_REF(msg).msg.w.time_started = sys_now(); + } else { + API_MSG_VAR_REF(msg).msg.w.time_started = 0; + } +#endif /* LWIP_SO_SNDTIMEO */ + + /* For locking the core: this _can_ be delayed on low memory/low send buffer, + but if it is, this is done inside api_msg.c:do_write(), so we can use the + non-blocking version here. */ + err = netconn_apimsg(lwip_netconn_do_write, &API_MSG_VAR_REF(msg)); + if ((err == ERR_OK) && (bytes_written != NULL)) { + if (dontblock) { + /* nonblocking write: maybe the data has been sent partly */ + *bytes_written = API_MSG_VAR_REF(msg).msg.w.len; + } else { + /* blocking call succeeded: all data has been sent if it */ + *bytes_written = size; + } + } + API_MSG_VAR_FREE(msg); + + return err; +} + +/** + * @ingroup netconn_tcp + * Close or shutdown a TCP netconn (doesn't delete it). + * + * @param conn the TCP netconn to close or shutdown + * @param how fully close or only shutdown one side? + * @return ERR_OK if the netconn was closed, any other err_t on error + */ +static err_t +netconn_close_shutdown(struct netconn *conn, u8_t how) +{ + API_MSG_VAR_DECLARE(msg); + err_t err; + LWIP_UNUSED_ARG(how); + + LWIP_ERROR("netconn_close: invalid conn", (conn != NULL), return ERR_ARG;); + + API_MSG_VAR_ALLOC(msg); + API_MSG_VAR_REF(msg).conn = conn; +#if LWIP_TCP + /* shutting down both ends is the same as closing */ + API_MSG_VAR_REF(msg).msg.sd.shut = how; +#if LWIP_SO_SNDTIMEO || LWIP_SO_LINGER + /* get the time we started, which is later compared to + sys_now() + conn->send_timeout */ + API_MSG_VAR_REF(msg).msg.sd.time_started = sys_now(); +#else /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */ + API_MSG_VAR_REF(msg).msg.sd.polls_left = + ((LWIP_TCP_CLOSE_TIMEOUT_MS_DEFAULT + TCP_SLOW_INTERVAL - 1) / TCP_SLOW_INTERVAL) + 1; +#endif /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */ +#endif /* LWIP_TCP */ + err = netconn_apimsg(lwip_netconn_do_close, &API_MSG_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); + + return err; +} + +/** + * @ingroup netconn_tcp + * Close a TCP netconn (doesn't delete it). + * + * @param conn the TCP netconn to close + * @return ERR_OK if the netconn was closed, any other err_t on error + */ +err_t +netconn_close(struct netconn *conn) +{ + /* shutting down both ends is the same as closing */ + return netconn_close_shutdown(conn, NETCONN_SHUT_RDWR); +} + +/** + * @ingroup netconn_tcp + * Shut down one or both sides of a TCP netconn (doesn't delete it). + * + * @param conn the TCP netconn to shut down + * @param shut_rx shut down the RX side (no more read possible after this) + * @param shut_tx shut down the TX side (no more write possible after this) + * @return ERR_OK if the netconn was closed, any other err_t on error + */ +err_t +netconn_shutdown(struct netconn *conn, u8_t shut_rx, u8_t shut_tx) +{ + return netconn_close_shutdown(conn, (shut_rx ? NETCONN_SHUT_RD : 0) | (shut_tx ? NETCONN_SHUT_WR : 0)); +} + +#if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) +/** + * @ingroup netconn_udp + * Join multicast groups for UDP netconns. + * + * @param conn the UDP netconn for which to change multicast addresses + * @param multiaddr IP address of the multicast group to join or leave + * @param netif_addr the IP address of the network interface on which to send + * the igmp message + * @param join_or_leave flag whether to send a join- or leave-message + * @return ERR_OK if the action was taken, any err_t on error + */ +err_t +netconn_join_leave_group(struct netconn *conn, + const ip_addr_t *multiaddr, + const ip_addr_t *netif_addr, + enum netconn_igmp join_or_leave) +{ + API_MSG_VAR_DECLARE(msg); + err_t err; + + LWIP_ERROR("netconn_join_leave_group: invalid conn", (conn != NULL), return ERR_ARG;); + + API_MSG_VAR_ALLOC(msg); + +#if LWIP_IPV4 + /* Don't propagate NULL pointer (IP_ADDR_ANY alias) to subsequent functions */ + if (multiaddr == NULL) { + multiaddr = IP4_ADDR_ANY; + } + if (netif_addr == NULL) { + netif_addr = IP4_ADDR_ANY; + } +#endif /* LWIP_IPV4 */ + + API_MSG_VAR_REF(msg).conn = conn; + API_MSG_VAR_REF(msg).msg.jl.multiaddr = API_MSG_VAR_REF(multiaddr); + API_MSG_VAR_REF(msg).msg.jl.netif_addr = API_MSG_VAR_REF(netif_addr); + API_MSG_VAR_REF(msg).msg.jl.join_or_leave = join_or_leave; + err = netconn_apimsg(lwip_netconn_do_join_leave_group, &API_MSG_VAR_REF(msg)); + API_MSG_VAR_FREE(msg); + + return err; +} +#endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */ + +#if LWIP_DNS +/** + * @ingroup netconn_common + * Execute a DNS query, only one IP address is returned + * + * @param name a string representation of the DNS host name to query + * @param addr a preallocated ip_addr_t where to store the resolved IP address + * @param dns_addrtype IP address type (IPv4 / IPv6) + * @return ERR_OK: resolving succeeded + * ERR_MEM: memory error, try again later + * ERR_ARG: dns client not initialized or invalid hostname + * ERR_VAL: dns server response was invalid + */ +#if LWIP_IPV4 && LWIP_IPV6 +err_t +netconn_gethostbyname_addrtype(const char *name, ip_addr_t *addr, u8_t dns_addrtype) +#else +err_t +netconn_gethostbyname(const char *name, ip_addr_t *addr) +#endif +{ + API_VAR_DECLARE(struct dns_api_msg, msg); +#if !LWIP_MPU_COMPATIBLE + sys_sem_t sem; +#endif /* LWIP_MPU_COMPATIBLE */ + err_t err; + err_t cberr; + + LWIP_ERROR("netconn_gethostbyname: invalid name", (name != NULL), return ERR_ARG;); + LWIP_ERROR("netconn_gethostbyname: invalid addr", (addr != NULL), return ERR_ARG;); +#if LWIP_MPU_COMPATIBLE + if (strlen(name) >= DNS_MAX_NAME_LENGTH) { + return ERR_ARG; + } +#endif + + API_VAR_ALLOC(struct dns_api_msg, MEMP_DNS_API_MSG, msg, ERR_MEM); +#if LWIP_MPU_COMPATIBLE + strncpy(API_VAR_REF(msg).name, name, DNS_MAX_NAME_LENGTH-1); + API_VAR_REF(msg).name[DNS_MAX_NAME_LENGTH-1] = 0; +#else /* LWIP_MPU_COMPATIBLE */ + msg.err = &err; + msg.sem = &sem; + API_VAR_REF(msg).addr = API_VAR_REF(addr); + API_VAR_REF(msg).name = name; +#endif /* LWIP_MPU_COMPATIBLE */ +#if LWIP_IPV4 && LWIP_IPV6 + API_VAR_REF(msg).dns_addrtype = dns_addrtype; +#endif /* LWIP_IPV4 && LWIP_IPV6 */ +#if LWIP_NETCONN_SEM_PER_THREAD + API_VAR_REF(msg).sem = LWIP_NETCONN_THREAD_SEM_GET(); +#else /* LWIP_NETCONN_SEM_PER_THREAD*/ + err = sys_sem_new(API_EXPR_REF(API_VAR_REF(msg).sem), 0); + if (err != ERR_OK) { + API_VAR_FREE(MEMP_DNS_API_MSG, msg); + return err; + } +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + + cberr = tcpip_callback(lwip_netconn_do_gethostbyname, &API_VAR_REF(msg)); + if (cberr != ERR_OK) { +#if !LWIP_NETCONN_SEM_PER_THREAD + sys_sem_free(API_EXPR_REF(API_VAR_REF(msg).sem)); +#endif /* !LWIP_NETCONN_SEM_PER_THREAD */ + API_VAR_FREE(MEMP_DNS_API_MSG, msg); + return cberr; + } + sys_sem_wait(API_EXPR_REF_SEM(API_VAR_REF(msg).sem)); +#if !LWIP_NETCONN_SEM_PER_THREAD + sys_sem_free(API_EXPR_REF(API_VAR_REF(msg).sem)); +#endif /* !LWIP_NETCONN_SEM_PER_THREAD */ + +#if LWIP_MPU_COMPATIBLE + *addr = msg->addr; + err = msg->err; +#endif /* LWIP_MPU_COMPATIBLE */ + + API_VAR_FREE(MEMP_DNS_API_MSG, msg); + return err; +} +#endif /* LWIP_DNS*/ + +#if LWIP_NETCONN_SEM_PER_THREAD +void +netconn_thread_init(void) +{ + sys_sem_t *sem = LWIP_NETCONN_THREAD_SEM_GET(); + if ((sem == NULL) || !sys_sem_valid(sem)) { + /* call alloc only once */ + LWIP_NETCONN_THREAD_SEM_ALLOC(); + LWIP_ASSERT("LWIP_NETCONN_THREAD_SEM_ALLOC() failed", sys_sem_valid(LWIP_NETCONN_THREAD_SEM_GET())); + } +} + +void +netconn_thread_cleanup(void) +{ + sys_sem_t *sem = LWIP_NETCONN_THREAD_SEM_GET(); + if ((sem != NULL) && sys_sem_valid(sem)) { + /* call free only once */ + LWIP_NETCONN_THREAD_SEM_FREE(); + } +} +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + +#endif /* LWIP_NETCONN */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/api_msg.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/api_msg.c new file mode 100644 index 0000000..dd99c1e --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/api_msg.c @@ -0,0 +1,1947 @@ +/** + * @file + * Sequential API Internal module + * + */ + +/* + * 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> + * + */ + +#include "lwip/opt.h" + +#if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/priv/api_msg.h" + +#include "lwip/ip.h" +#include "lwip/ip_addr.h" +#include "lwip/udp.h" +#include "lwip/tcp.h" +#include "lwip/raw.h" + +#include "lwip/memp.h" +#include "lwip/igmp.h" +#include "lwip/dns.h" +#include "lwip/mld6.h" +#include "lwip/priv/tcpip_priv.h" + +#include <string.h> + +/* netconns are polled once per second (e.g. continue write on memory error) */ +#define NETCONN_TCP_POLL_INTERVAL 2 + +#define SET_NONBLOCKING_CONNECT(conn, val) do { if (val) { \ + (conn)->flags |= NETCONN_FLAG_IN_NONBLOCKING_CONNECT; \ +} else { \ + (conn)->flags &= ~ NETCONN_FLAG_IN_NONBLOCKING_CONNECT; }} while(0) +#define IN_NONBLOCKING_CONNECT(conn) (((conn)->flags & NETCONN_FLAG_IN_NONBLOCKING_CONNECT) != 0) + +/* forward declarations */ +#if LWIP_TCP +#if LWIP_TCPIP_CORE_LOCKING +#define WRITE_DELAYED , 1 +#define WRITE_DELAYED_PARAM , u8_t delayed +#else /* LWIP_TCPIP_CORE_LOCKING */ +#define WRITE_DELAYED +#define WRITE_DELAYED_PARAM +#endif /* LWIP_TCPIP_CORE_LOCKING */ +static err_t lwip_netconn_do_writemore(struct netconn *conn WRITE_DELAYED_PARAM); +static err_t lwip_netconn_do_close_internal(struct netconn *conn WRITE_DELAYED_PARAM); +#endif + +#if LWIP_TCPIP_CORE_LOCKING +#define TCPIP_APIMSG_ACK(m) NETCONN_SET_SAFE_ERR((m)->conn, (m)->err) +#else /* LWIP_TCPIP_CORE_LOCKING */ +#define TCPIP_APIMSG_ACK(m) do { NETCONN_SET_SAFE_ERR((m)->conn, (m)->err); sys_sem_signal(LWIP_API_MSG_SEM(m)); } while(0) +#endif /* LWIP_TCPIP_CORE_LOCKING */ + +#if LWIP_TCP +u8_t netconn_aborted; +#endif /* LWIP_TCP */ + +#if LWIP_RAW +/** + * Receive callback function for RAW netconns. + * Doesn't 'eat' the packet, only copies it and sends it to + * conn->recvmbox + * + * @see raw.h (struct raw_pcb.recv) for parameters and return value + */ +static u8_t +recv_raw(void *arg, struct raw_pcb *pcb, struct pbuf *p, + const ip_addr_t *addr) +{ + struct pbuf *q; + struct netbuf *buf; + struct netconn *conn; + + LWIP_UNUSED_ARG(addr); + conn = (struct netconn *)arg; + + if ((conn != NULL) && sys_mbox_valid(&conn->recvmbox)) { +#if LWIP_SO_RCVBUF + int recv_avail; + SYS_ARCH_GET(conn->recv_avail, recv_avail); + if ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize) { + return 0; + } +#endif /* LWIP_SO_RCVBUF */ + /* copy the whole packet into new pbufs */ + q = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM); + if (q != NULL) { + if (pbuf_copy(q, p) != ERR_OK) { + pbuf_free(q); + q = NULL; + } + } + + if (q != NULL) { + u16_t len; + buf = (struct netbuf *)memp_malloc(MEMP_NETBUF); + if (buf == NULL) { + pbuf_free(q); + return 0; + } + + buf->p = q; + buf->ptr = q; + ip_addr_copy(buf->addr, *ip_current_src_addr()); + buf->port = pcb->protocol; + + len = q->tot_len; + if (sys_mbox_trypost(&conn->recvmbox, buf) != ERR_OK) { + netbuf_delete(buf); + return 0; + } else { +#if LWIP_SO_RCVBUF + SYS_ARCH_INC(conn->recv_avail, len); +#endif /* LWIP_SO_RCVBUF */ + /* Register event with callback */ + API_EVENT(conn, NETCONN_EVT_RCVPLUS, len); + } + } + } + + return 0; /* do not eat the packet */ +} +#endif /* LWIP_RAW*/ + +#if LWIP_UDP +/** + * Receive callback function for UDP netconns. + * Posts the packet to conn->recvmbox or deletes it on memory error. + * + * @see udp.h (struct udp_pcb.recv) for parameters + */ +static void +recv_udp(void *arg, struct udp_pcb *pcb, struct pbuf *p, + const ip_addr_t *addr, u16_t port) +{ + struct netbuf *buf; + struct netconn *conn; + u16_t len; +#if LWIP_SO_RCVBUF + int recv_avail; +#endif /* LWIP_SO_RCVBUF */ + + LWIP_UNUSED_ARG(pcb); /* only used for asserts... */ + LWIP_ASSERT("recv_udp must have a pcb argument", pcb != NULL); + LWIP_ASSERT("recv_udp must have an argument", arg != NULL); + conn = (struct netconn *)arg; + LWIP_ASSERT("recv_udp: recv for wrong pcb!", conn->pcb.udp == pcb); + +#if LWIP_SO_RCVBUF + SYS_ARCH_GET(conn->recv_avail, recv_avail); + if ((conn == NULL) || !sys_mbox_valid(&conn->recvmbox) || + ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize)) { +#else /* LWIP_SO_RCVBUF */ + if ((conn == NULL) || !sys_mbox_valid(&conn->recvmbox)) { +#endif /* LWIP_SO_RCVBUF */ + pbuf_free(p); + return; + } + + buf = (struct netbuf *)memp_malloc(MEMP_NETBUF); + if (buf == NULL) { + pbuf_free(p); + return; + } else { + buf->p = p; + buf->ptr = p; + ip_addr_set(&buf->addr, addr); + buf->port = port; +#if LWIP_NETBUF_RECVINFO + { + /* get the UDP header - always in the first pbuf, ensured by udp_input */ + const struct udp_hdr* udphdr = (const struct udp_hdr*)ip_next_header_ptr(); +#if LWIP_CHECKSUM_ON_COPY + buf->flags = NETBUF_FLAG_DESTADDR; +#endif /* LWIP_CHECKSUM_ON_COPY */ + ip_addr_set(&buf->toaddr, ip_current_dest_addr()); + buf->toport_chksum = udphdr->dest; + } +#endif /* LWIP_NETBUF_RECVINFO */ + } + + len = p->tot_len; + if (sys_mbox_trypost(&conn->recvmbox, buf) != ERR_OK) { + netbuf_delete(buf); + return; + } else { +#if LWIP_SO_RCVBUF + SYS_ARCH_INC(conn->recv_avail, len); +#endif /* LWIP_SO_RCVBUF */ + /* Register event with callback */ + API_EVENT(conn, NETCONN_EVT_RCVPLUS, len); + } +} +#endif /* LWIP_UDP */ + +#if LWIP_TCP +/** + * Receive callback function for TCP netconns. + * Posts the packet to conn->recvmbox, but doesn't delete it on errors. + * + * @see tcp.h (struct tcp_pcb.recv) for parameters and return value + */ +static err_t +recv_tcp(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err) +{ + struct netconn *conn; + u16_t len; + + LWIP_UNUSED_ARG(pcb); + LWIP_ASSERT("recv_tcp must have a pcb argument", pcb != NULL); + LWIP_ASSERT("recv_tcp must have an argument", arg != NULL); + conn = (struct netconn *)arg; + + if (conn == NULL) { + return ERR_VAL; + } + LWIP_ASSERT("recv_tcp: recv for wrong pcb!", conn->pcb.tcp == pcb); + + if (!sys_mbox_valid(&conn->recvmbox)) { + /* recvmbox already deleted */ + if (p != NULL) { + tcp_recved(pcb, p->tot_len); + pbuf_free(p); + } + return ERR_OK; + } + /* Unlike for UDP or RAW pcbs, don't check for available space + using recv_avail since that could break the connection + (data is already ACKed) */ + + /* don't overwrite fatal errors! */ + if (err != ERR_OK) { + NETCONN_SET_SAFE_ERR(conn, err); + } + + if (p != NULL) { + len = p->tot_len; + } else { + len = 0; + } + + if (sys_mbox_trypost(&conn->recvmbox, p) != ERR_OK) { + /* don't deallocate p: it is presented to us later again from tcp_fasttmr! */ + return ERR_MEM; + } else { +#if LWIP_SO_RCVBUF + SYS_ARCH_INC(conn->recv_avail, len); +#endif /* LWIP_SO_RCVBUF */ + /* Register event with callback */ + API_EVENT(conn, NETCONN_EVT_RCVPLUS, len); + } + + return ERR_OK; +} + +/** + * Poll callback function for TCP netconns. + * Wakes up an application thread that waits for a connection to close + * or data to be sent. The application thread then takes the + * appropriate action to go on. + * + * Signals the conn->sem. + * netconn_close waits for conn->sem if closing failed. + * + * @see tcp.h (struct tcp_pcb.poll) for parameters and return value + */ +static err_t +poll_tcp(void *arg, struct tcp_pcb *pcb) +{ + struct netconn *conn = (struct netconn *)arg; + + LWIP_UNUSED_ARG(pcb); + LWIP_ASSERT("conn != NULL", (conn != NULL)); + + if (conn->state == NETCONN_WRITE) { + lwip_netconn_do_writemore(conn WRITE_DELAYED); + } else if (conn->state == NETCONN_CLOSE) { +#if !LWIP_SO_SNDTIMEO && !LWIP_SO_LINGER + if (conn->current_msg && conn->current_msg->msg.sd.polls_left) { + conn->current_msg->msg.sd.polls_left--; + } +#endif /* !LWIP_SO_SNDTIMEO && !LWIP_SO_LINGER */ + lwip_netconn_do_close_internal(conn WRITE_DELAYED); + } + /* @todo: implement connect timeout here? */ + + /* Did a nonblocking write fail before? Then check available write-space. */ + if (conn->flags & NETCONN_FLAG_CHECK_WRITESPACE) { + /* If the queued byte- or pbuf-count drops below the configured low-water limit, + let select mark this pcb as writable again. */ + if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT) && + (tcp_sndqueuelen(conn->pcb.tcp) < TCP_SNDQUEUELOWAT)) { + conn->flags &= ~NETCONN_FLAG_CHECK_WRITESPACE; + API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0); + } + } + + return ERR_OK; +} + +/** + * Sent callback function for TCP netconns. + * Signals the conn->sem and calls API_EVENT. + * netconn_write waits for conn->sem if send buffer is low. + * + * @see tcp.h (struct tcp_pcb.sent) for parameters and return value + */ +static err_t +sent_tcp(void *arg, struct tcp_pcb *pcb, u16_t len) +{ + struct netconn *conn = (struct netconn *)arg; + + LWIP_UNUSED_ARG(pcb); + LWIP_ASSERT("conn != NULL", (conn != NULL)); + + if (conn) { + if (conn->state == NETCONN_WRITE) { + lwip_netconn_do_writemore(conn WRITE_DELAYED); + } else if (conn->state == NETCONN_CLOSE) { + lwip_netconn_do_close_internal(conn WRITE_DELAYED); + } + + /* If the queued byte- or pbuf-count drops below the configured low-water limit, + let select mark this pcb as writable again. */ + if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT) && + (tcp_sndqueuelen(conn->pcb.tcp) < TCP_SNDQUEUELOWAT)) { + conn->flags &= ~NETCONN_FLAG_CHECK_WRITESPACE; + API_EVENT(conn, NETCONN_EVT_SENDPLUS, len); + } + } + + return ERR_OK; +} + +/** + * Error callback function for TCP netconns. + * Signals conn->sem, posts to all conn mboxes and calls API_EVENT. + * The application thread has then to decide what to do. + * + * @see tcp.h (struct tcp_pcb.err) for parameters + */ +static void +err_tcp(void *arg, err_t err) +{ + struct netconn *conn; + enum netconn_state old_state; + + conn = (struct netconn *)arg; + LWIP_ASSERT("conn != NULL", (conn != NULL)); + + conn->pcb.tcp = NULL; + + /* reset conn->state now before waking up other threads */ + old_state = conn->state; + conn->state = NETCONN_NONE; + + if (old_state == NETCONN_CLOSE) { + /* RST during close: let close return success & dealloc the netconn */ + err = ERR_OK; + NETCONN_SET_SAFE_ERR(conn, ERR_OK); + } else { + /* no check since this is always fatal! */ + SYS_ARCH_SET(conn->last_err, err); + } + + /* @todo: the type of NETCONN_EVT created should depend on 'old_state' */ + + /* Notify the user layer about a connection error. Used to signal select. */ + API_EVENT(conn, NETCONN_EVT_ERROR, 0); + /* Try to release selects pending on 'read' or 'write', too. + They will get an error if they actually try to read or write. */ + API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0); + API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0); + + /* pass NULL-message to recvmbox to wake up pending recv */ + if (sys_mbox_valid(&conn->recvmbox)) { + /* use trypost to prevent deadlock */ + sys_mbox_trypost(&conn->recvmbox, NULL); + } + /* pass NULL-message to acceptmbox to wake up pending accept */ + if (sys_mbox_valid(&conn->acceptmbox)) { + /* use trypost to preven deadlock */ + sys_mbox_trypost(&conn->acceptmbox, NULL); + } + + if ((old_state == NETCONN_WRITE) || (old_state == NETCONN_CLOSE) || + (old_state == NETCONN_CONNECT)) { + /* calling lwip_netconn_do_writemore/lwip_netconn_do_close_internal is not necessary + since the pcb has already been deleted! */ + int was_nonblocking_connect = IN_NONBLOCKING_CONNECT(conn); + SET_NONBLOCKING_CONNECT(conn, 0); + + if (!was_nonblocking_connect) { + sys_sem_t* op_completed_sem; + /* set error return code */ + LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL); + conn->current_msg->err = err; + op_completed_sem = LWIP_API_MSG_SEM(conn->current_msg); + LWIP_ASSERT("inavlid op_completed_sem", sys_sem_valid(op_completed_sem)); + conn->current_msg = NULL; + /* wake up the waiting task */ + NETCONN_SET_SAFE_ERR(conn, err); + sys_sem_signal(op_completed_sem); + } + } else { + LWIP_ASSERT("conn->current_msg == NULL", conn->current_msg == NULL); + } +} + +/** + * Setup a tcp_pcb with the correct callback function pointers + * and their arguments. + * + * @param conn the TCP netconn to setup + */ +static void +setup_tcp(struct netconn *conn) +{ + struct tcp_pcb *pcb; + + pcb = conn->pcb.tcp; + tcp_arg(pcb, conn); + tcp_recv(pcb, recv_tcp); + tcp_sent(pcb, sent_tcp); + tcp_poll(pcb, poll_tcp, NETCONN_TCP_POLL_INTERVAL); + tcp_err(pcb, err_tcp); +} + +/** + * Accept callback function for TCP netconns. + * Allocates a new netconn and posts that to conn->acceptmbox. + * + * @see tcp.h (struct tcp_pcb_listen.accept) for parameters and return value + */ +static err_t +accept_function(void *arg, struct tcp_pcb *newpcb, err_t err) +{ + struct netconn *newconn; + struct netconn *conn = (struct netconn *)arg; + + LWIP_DEBUGF(API_MSG_DEBUG, ("accept_function: newpcb->tate: %s\n", tcp_debug_state_str(newpcb->state))); + + if (conn == NULL) { + return ERR_VAL; + } + if (!sys_mbox_valid(&conn->acceptmbox)) { + LWIP_DEBUGF(API_MSG_DEBUG, ("accept_function: acceptmbox already deleted\n")); + return ERR_VAL; + } + + if (newpcb == NULL) { + /* out-of-pcbs during connect: pass on this error to the application */ + if (sys_mbox_trypost(&conn->acceptmbox, &netconn_aborted) == ERR_OK) { + /* Register event with callback */ + API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0); + } + return ERR_VAL; + } + + /* We have to set the callback here even though + * the new socket is unknown. newconn->socket is marked as -1. */ + newconn = netconn_alloc(conn->type, conn->callback); + if (newconn == NULL) { + /* outof netconns: pass on this error to the application */ + if (sys_mbox_trypost(&conn->acceptmbox, &netconn_aborted) == ERR_OK) { + /* Register event with callback */ + API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0); + } + return ERR_MEM; + } + newconn->pcb.tcp = newpcb; + setup_tcp(newconn); + /* no protection: when creating the pcb, the netconn is not yet known + to the application thread */ + newconn->last_err = err; + + /* handle backlog counter */ + tcp_backlog_delayed(newpcb); + + if (sys_mbox_trypost(&conn->acceptmbox, newconn) != ERR_OK) { + /* When returning != ERR_OK, the pcb is aborted in tcp_process(), + so do nothing here! */ + /* remove all references to this netconn from the pcb */ + struct tcp_pcb* pcb = newconn->pcb.tcp; + tcp_arg(pcb, NULL); + tcp_recv(pcb, NULL); + tcp_sent(pcb, NULL); + tcp_poll(pcb, NULL, 0); + tcp_err(pcb, NULL); + /* remove reference from to the pcb from this netconn */ + newconn->pcb.tcp = NULL; + /* no need to drain since we know the recvmbox is empty. */ + sys_mbox_free(&newconn->recvmbox); + sys_mbox_set_invalid(&newconn->recvmbox); + netconn_free(newconn); + return ERR_MEM; + } else { + /* Register event with callback */ + API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0); + } + + return ERR_OK; +} +#endif /* LWIP_TCP */ + +/** + * Create a new pcb of a specific type. + * Called from lwip_netconn_do_newconn(). + * + * @param msg the api_msg_msg describing the connection type + */ +static void +pcb_new(struct api_msg *msg) +{ + enum lwip_ip_addr_type iptype = IPADDR_TYPE_V4; + + LWIP_ASSERT("pcb_new: pcb already allocated", msg->conn->pcb.tcp == NULL); + +#if LWIP_IPV6 && LWIP_IPV4 + /* IPv6: Dual-stack by default, unless netconn_set_ipv6only() is called */ + if(NETCONNTYPE_ISIPV6(netconn_type(msg->conn))) { + iptype = IPADDR_TYPE_ANY; + } +#endif + + /* Allocate a PCB for this connection */ + switch(NETCONNTYPE_GROUP(msg->conn->type)) { +#if LWIP_RAW + case NETCONN_RAW: + msg->conn->pcb.raw = raw_new_ip_type(iptype, msg->msg.n.proto); + if (msg->conn->pcb.raw != NULL) { +#if LWIP_IPV6 + /* ICMPv6 packets should always have checksum calculated by the stack as per RFC 3542 chapter 3.1 */ + if (NETCONNTYPE_ISIPV6(msg->conn->type) && msg->conn->pcb.raw->protocol == IP6_NEXTH_ICMP6) { + msg->conn->pcb.raw->chksum_reqd = 1; + msg->conn->pcb.raw->chksum_offset = 2; + } +#endif /* LWIP_IPV6 */ + raw_recv(msg->conn->pcb.raw, recv_raw, msg->conn); + } + break; +#endif /* LWIP_RAW */ +#if LWIP_UDP + case NETCONN_UDP: + msg->conn->pcb.udp = udp_new_ip_type(iptype); + if (msg->conn->pcb.udp != NULL) { +#if LWIP_UDPLITE + if (NETCONNTYPE_ISUDPLITE(msg->conn->type)) { + udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_UDPLITE); + } +#endif /* LWIP_UDPLITE */ + if (NETCONNTYPE_ISUDPNOCHKSUM(msg->conn->type)) { + udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_NOCHKSUM); + } + udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn); + } + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + msg->conn->pcb.tcp = tcp_new_ip_type(iptype); + if (msg->conn->pcb.tcp != NULL) { + setup_tcp(msg->conn); + } + break; +#endif /* LWIP_TCP */ + default: + /* Unsupported netconn type, e.g. protocol disabled */ + msg->err = ERR_VAL; + return; + } + if (msg->conn->pcb.ip == NULL) { + msg->err = ERR_MEM; + } +} + +/** + * Create a new pcb of a specific type inside a netconn. + * Called from netconn_new_with_proto_and_callback. + * + * @param m the api_msg_msg describing the connection type + */ +void +lwip_netconn_do_newconn(void *m) +{ + struct api_msg *msg = (struct api_msg*)m; + + msg->err = ERR_OK; + if (msg->conn->pcb.tcp == NULL) { + pcb_new(msg); + } + /* Else? This "new" connection already has a PCB allocated. */ + /* Is this an error condition? Should it be deleted? */ + /* We currently just are happy and return. */ + + TCPIP_APIMSG_ACK(msg); +} + +/** + * Create a new netconn (of a specific type) that has a callback function. + * The corresponding pcb is NOT created! + * + * @param t the type of 'connection' to create (@see enum netconn_type) + * @param callback a function to call on status changes (RX available, TX'ed) + * @return a newly allocated struct netconn or + * NULL on memory error + */ +struct netconn* +netconn_alloc(enum netconn_type t, netconn_callback callback) +{ + struct netconn *conn; + int size; + + conn = (struct netconn *)memp_malloc(MEMP_NETCONN); + if (conn == NULL) { + return NULL; + } + + conn->last_err = ERR_OK; + conn->type = t; + conn->pcb.tcp = NULL; + + /* If all sizes are the same, every compiler should optimize this switch to nothing */ + switch(NETCONNTYPE_GROUP(t)) { +#if LWIP_RAW + case NETCONN_RAW: + size = DEFAULT_RAW_RECVMBOX_SIZE; + break; +#endif /* LWIP_RAW */ +#if LWIP_UDP + case NETCONN_UDP: + size = DEFAULT_UDP_RECVMBOX_SIZE; + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + size = DEFAULT_TCP_RECVMBOX_SIZE; + break; +#endif /* LWIP_TCP */ + default: + LWIP_ASSERT("netconn_alloc: undefined netconn_type", 0); + goto free_and_return; + } + + if (sys_mbox_new(&conn->recvmbox, size) != ERR_OK) { + goto free_and_return; + } +#if !LWIP_NETCONN_SEM_PER_THREAD + if (sys_sem_new(&conn->op_completed, 0) != ERR_OK) { + sys_mbox_free(&conn->recvmbox); + goto free_and_return; + } +#endif + +#if LWIP_TCP + sys_mbox_set_invalid(&conn->acceptmbox); +#endif + conn->state = NETCONN_NONE; +#if LWIP_SOCKET + /* initialize socket to -1 since 0 is a valid socket */ + conn->socket = -1; +#endif /* LWIP_SOCKET */ + conn->callback = callback; +#if LWIP_TCP + conn->current_msg = NULL; + conn->write_offset = 0; +#endif /* LWIP_TCP */ +#if LWIP_SO_SNDTIMEO + conn->send_timeout = 0; +#endif /* LWIP_SO_SNDTIMEO */ +#if LWIP_SO_RCVTIMEO + conn->recv_timeout = 0; +#endif /* LWIP_SO_RCVTIMEO */ +#if LWIP_SO_RCVBUF + conn->recv_bufsize = RECV_BUFSIZE_DEFAULT; + conn->recv_avail = 0; +#endif /* LWIP_SO_RCVBUF */ +#if LWIP_SO_LINGER + conn->linger = -1; +#endif /* LWIP_SO_LINGER */ + conn->flags = 0; + return conn; +free_and_return: + memp_free(MEMP_NETCONN, conn); + return NULL; +} + +/** + * Delete a netconn and all its resources. + * The pcb is NOT freed (since we might not be in the right thread context do this). + * + * @param conn the netconn to free + */ +void +netconn_free(struct netconn *conn) +{ + LWIP_ASSERT("PCB must be deallocated outside this function", conn->pcb.tcp == NULL); + LWIP_ASSERT("recvmbox must be deallocated before calling this function", + !sys_mbox_valid(&conn->recvmbox)); +#if LWIP_TCP + LWIP_ASSERT("acceptmbox must be deallocated before calling this function", + !sys_mbox_valid(&conn->acceptmbox)); +#endif /* LWIP_TCP */ + +#if !LWIP_NETCONN_SEM_PER_THREAD + sys_sem_free(&conn->op_completed); + sys_sem_set_invalid(&conn->op_completed); +#endif + + memp_free(MEMP_NETCONN, conn); +} + +/** + * Delete rcvmbox and acceptmbox of a netconn and free the left-over data in + * these mboxes + * + * @param conn the netconn to free + * @bytes_drained bytes drained from recvmbox + * @accepts_drained pending connections drained from acceptmbox + */ +static void +netconn_drain(struct netconn *conn) +{ + void *mem; +#if LWIP_TCP + struct pbuf *p; +#endif /* LWIP_TCP */ + + /* This runs in tcpip_thread, so we don't need to lock against rx packets */ + + /* Delete and drain the recvmbox. */ + if (sys_mbox_valid(&conn->recvmbox)) { + while (sys_mbox_tryfetch(&conn->recvmbox, &mem) != SYS_MBOX_EMPTY) { +#if LWIP_TCP + if (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP) { + if (mem != NULL) { + p = (struct pbuf*)mem; + /* pcb might be set to NULL already by err_tcp() */ + if (conn->pcb.tcp != NULL) { + tcp_recved(conn->pcb.tcp, p->tot_len); + } + pbuf_free(p); + } + } else +#endif /* LWIP_TCP */ + { + netbuf_delete((struct netbuf *)mem); + } + } + sys_mbox_free(&conn->recvmbox); + sys_mbox_set_invalid(&conn->recvmbox); + } + + /* Delete and drain the acceptmbox. */ +#if LWIP_TCP + if (sys_mbox_valid(&conn->acceptmbox)) { + while (sys_mbox_tryfetch(&conn->acceptmbox, &mem) != SYS_MBOX_EMPTY) { + if (mem != &netconn_aborted) { + struct netconn *newconn = (struct netconn *)mem; + /* Only tcp pcbs have an acceptmbox, so no need to check conn->type */ + /* pcb might be set to NULL already by err_tcp() */ + /* drain recvmbox */ + netconn_drain(newconn); + if (newconn->pcb.tcp != NULL) { + tcp_abort(newconn->pcb.tcp); + newconn->pcb.tcp = NULL; + } + netconn_free(newconn); + } + } + sys_mbox_free(&conn->acceptmbox); + sys_mbox_set_invalid(&conn->acceptmbox); + } +#endif /* LWIP_TCP */ +} + +#if LWIP_TCP +/** + * Internal helper function to close a TCP netconn: since this sometimes + * doesn't work at the first attempt, this function is called from multiple + * places. + * + * @param conn the TCP netconn to close + */ +static err_t +lwip_netconn_do_close_internal(struct netconn *conn WRITE_DELAYED_PARAM) +{ + err_t err; + u8_t shut, shut_rx, shut_tx, close; + u8_t close_finished = 0; + struct tcp_pcb* tpcb; +#if LWIP_SO_LINGER + u8_t linger_wait_required = 0; +#endif /* LWIP_SO_LINGER */ + + LWIP_ASSERT("invalid conn", (conn != NULL)); + LWIP_ASSERT("this is for tcp netconns only", (NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP)); + LWIP_ASSERT("conn must be in state NETCONN_CLOSE", (conn->state == NETCONN_CLOSE)); + LWIP_ASSERT("pcb already closed", (conn->pcb.tcp != NULL)); + LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL); + + tpcb = conn->pcb.tcp; + shut = conn->current_msg->msg.sd.shut; + shut_rx = shut & NETCONN_SHUT_RD; + shut_tx = shut & NETCONN_SHUT_WR; + /* shutting down both ends is the same as closing + (also if RD or WR side was shut down before already) */ + if (shut == NETCONN_SHUT_RDWR) { + close = 1; + } else if (shut_rx && + ((tpcb->state == FIN_WAIT_1) || + (tpcb->state == FIN_WAIT_2) || + (tpcb->state == CLOSING))) { + close = 1; + } else if (shut_tx && ((tpcb->flags & TF_RXCLOSED) != 0)) { + close = 1; + } else { + close = 0; + } + + /* Set back some callback pointers */ + if (close) { + tcp_arg(tpcb, NULL); + } + if (tpcb->state == LISTEN) { + tcp_accept(tpcb, NULL); + } else { + /* some callbacks have to be reset if tcp_close is not successful */ + if (shut_rx) { + tcp_recv(tpcb, NULL); + tcp_accept(tpcb, NULL); + } + if (shut_tx) { + tcp_sent(tpcb, NULL); + } + if (close) { + tcp_poll(tpcb, NULL, 0); + tcp_err(tpcb, NULL); + } + } + /* Try to close the connection */ + if (close) { +#if LWIP_SO_LINGER + /* check linger possibilites before calling tcp_close */ + err = ERR_OK; + /* linger enabled/required at all? (i.e. is there untransmitted data left?) */ + if ((conn->linger >= 0) && (conn->pcb.tcp->unsent || conn->pcb.tcp->unacked)) { + if ((conn->linger == 0)) { + /* data left but linger prevents waiting */ + tcp_abort(tpcb); + tpcb = NULL; + } else if (conn->linger > 0) { + /* data left and linger says we should wait */ + if (netconn_is_nonblocking(conn)) { + /* data left on a nonblocking netconn -> cannot linger */ + err = ERR_WOULDBLOCK; + } else if ((s32_t)(sys_now() - conn->current_msg->msg.sd.time_started) >= + (conn->linger * 1000)) { + /* data left but linger timeout has expired (this happens on further + calls to this function through poll_tcp */ + tcp_abort(tpcb); + tpcb = NULL; + } else { + /* data left -> need to wait for ACK after successful close */ + linger_wait_required = 1; + } + } + } + if ((err == ERR_OK) && (tpcb != NULL)) +#endif /* LWIP_SO_LINGER */ + { + err = tcp_close(tpcb); + } + } else { + err = tcp_shutdown(tpcb, shut_rx, shut_tx); + } + if (err == ERR_OK) { + close_finished = 1; +#if LWIP_SO_LINGER + if (linger_wait_required) { + /* wait for ACK of all unsent/unacked data by just getting called again */ + close_finished = 0; + err = ERR_INPROGRESS; + } +#endif /* LWIP_SO_LINGER */ + } else { + if (err == ERR_MEM) { + /* Closing failed because of memory shortage, try again later. Even for + nonblocking netconns, we have to wait since no standard socket application + is prepared for close failing because of resource shortage. + Check the timeout: this is kind of an lwip addition to the standard sockets: + we wait for some time when failing to allocate a segment for the FIN */ +#if LWIP_SO_SNDTIMEO || LWIP_SO_LINGER + s32_t close_timeout = LWIP_TCP_CLOSE_TIMEOUT_MS_DEFAULT; +#if LWIP_SO_SNDTIMEO + if (conn->send_timeout > 0) { + close_timeout = conn->send_timeout; + } +#endif /* LWIP_SO_SNDTIMEO */ +#if LWIP_SO_LINGER + if (conn->linger >= 0) { + /* use linger timeout (seconds) */ + close_timeout = conn->linger * 1000U; + } +#endif + if ((s32_t)(sys_now() - conn->current_msg->msg.sd.time_started) >= close_timeout) { +#else /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */ + if (conn->current_msg->msg.sd.polls_left == 0) { +#endif /* LWIP_SO_SNDTIMEO || LWIP_SO_LINGER */ + close_finished = 1; + if (close) { + /* in this case, we want to RST the connection */ + tcp_abort(tpcb); + err = ERR_OK; + } + } + } else { + /* Closing failed for a non-memory error: give up */ + close_finished = 1; + } + } + if (close_finished) { + /* Closing done (succeeded, non-memory error, nonblocking error or timeout) */ + sys_sem_t* op_completed_sem = LWIP_API_MSG_SEM(conn->current_msg); + conn->current_msg->err = err; + conn->current_msg = NULL; + conn->state = NETCONN_NONE; + if (err == ERR_OK) { + if (close) { + /* Set back some callback pointers as conn is going away */ + conn->pcb.tcp = NULL; + /* Trigger select() in socket layer. Make sure everybody notices activity + on the connection, error first! */ + API_EVENT(conn, NETCONN_EVT_ERROR, 0); + } + if (shut_rx) { + API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0); + } + if (shut_tx) { + API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0); + } + } + NETCONN_SET_SAFE_ERR(conn, err); +#if LWIP_TCPIP_CORE_LOCKING + if (delayed) +#endif + { + /* wake up the application task */ + sys_sem_signal(op_completed_sem); + } + return ERR_OK; + } + if (!close_finished) { + /* Closing failed and we want to wait: restore some of the callbacks */ + /* Closing of listen pcb will never fail! */ + LWIP_ASSERT("Closing a listen pcb may not fail!", (tpcb->state != LISTEN)); + if (shut_tx) { + tcp_sent(tpcb, sent_tcp); + } + /* when waiting for close, set up poll interval to 500ms */ + tcp_poll(tpcb, poll_tcp, 1); + tcp_err(tpcb, err_tcp); + tcp_arg(tpcb, conn); + /* don't restore recv callback: we don't want to receive any more data */ + } + /* If closing didn't succeed, we get called again either + from poll_tcp or from sent_tcp */ + LWIP_ASSERT("err != ERR_OK", err != ERR_OK); + return err; +} +#endif /* LWIP_TCP */ + +/** + * Delete the pcb inside a netconn. + * Called from netconn_delete. + * + * @param m the api_msg_msg pointing to the connection + */ +void +lwip_netconn_do_delconn(void *m) +{ + struct api_msg *msg = (struct api_msg*)m; + + enum netconn_state state = msg->conn->state; + LWIP_ASSERT("netconn state error", /* this only happens for TCP netconns */ + (state == NETCONN_NONE) || (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP)); +#if LWIP_NETCONN_FULLDUPLEX + /* In full duplex mode, blocking write/connect is aborted with ERR_CLSD */ + if (state != NETCONN_NONE) { + if ((state == NETCONN_WRITE) || + ((state == NETCONN_CONNECT) && !IN_NONBLOCKING_CONNECT(msg->conn))) { + /* close requested, abort running write/connect */ + sys_sem_t* op_completed_sem; + LWIP_ASSERT("msg->conn->current_msg != NULL", msg->conn->current_msg != NULL); + op_completed_sem = LWIP_API_MSG_SEM(msg->conn->current_msg); + msg->conn->current_msg->err = ERR_CLSD; + msg->conn->current_msg = NULL; + msg->conn->write_offset = 0; + msg->conn->state = NETCONN_NONE; + NETCONN_SET_SAFE_ERR(msg->conn, ERR_CLSD); + sys_sem_signal(op_completed_sem); + } + } +#else /* LWIP_NETCONN_FULLDUPLEX */ + if (((state != NETCONN_NONE) && + (state != NETCONN_LISTEN) && + (state != NETCONN_CONNECT)) || + ((state == NETCONN_CONNECT) && !IN_NONBLOCKING_CONNECT(msg->conn))) { + /* This means either a blocking write or blocking connect is running + (nonblocking write returns and sets state to NONE) */ + msg->err = ERR_INPROGRESS; + } else +#endif /* LWIP_NETCONN_FULLDUPLEX */ + { + LWIP_ASSERT("blocking connect in progress", + (state != NETCONN_CONNECT) || IN_NONBLOCKING_CONNECT(msg->conn)); + msg->err = ERR_OK; + /* Drain and delete mboxes */ + netconn_drain(msg->conn); + + if (msg->conn->pcb.tcp != NULL) { + + switch (NETCONNTYPE_GROUP(msg->conn->type)) { +#if LWIP_RAW + case NETCONN_RAW: + raw_remove(msg->conn->pcb.raw); + break; +#endif /* LWIP_RAW */ +#if LWIP_UDP + case NETCONN_UDP: + msg->conn->pcb.udp->recv_arg = NULL; + udp_remove(msg->conn->pcb.udp); + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL && + msg->conn->write_offset == 0); + msg->conn->state = NETCONN_CLOSE; + msg->msg.sd.shut = NETCONN_SHUT_RDWR; + msg->conn->current_msg = msg; +#if LWIP_TCPIP_CORE_LOCKING + if (lwip_netconn_do_close_internal(msg->conn, 0) != ERR_OK) { + LWIP_ASSERT("state!", msg->conn->state == NETCONN_CLOSE); + UNLOCK_TCPIP_CORE(); + sys_arch_sem_wait(LWIP_API_MSG_SEM(msg), 0); + LOCK_TCPIP_CORE(); + LWIP_ASSERT("state!", msg->conn->state == NETCONN_NONE); + } +#else /* LWIP_TCPIP_CORE_LOCKING */ + lwip_netconn_do_close_internal(msg->conn); +#endif /* LWIP_TCPIP_CORE_LOCKING */ + /* API_EVENT is called inside lwip_netconn_do_close_internal, before releasing + the application thread, so we can return at this point! */ + return; +#endif /* LWIP_TCP */ + default: + break; + } + msg->conn->pcb.tcp = NULL; + } + /* tcp netconns don't come here! */ + + /* @todo: this lets select make the socket readable and writable, + which is wrong! errfd instead? */ + API_EVENT(msg->conn, NETCONN_EVT_RCVPLUS, 0); + API_EVENT(msg->conn, NETCONN_EVT_SENDPLUS, 0); + } + if (sys_sem_valid(LWIP_API_MSG_SEM(msg))) { + TCPIP_APIMSG_ACK(msg); + } +} + +/** + * Bind a pcb contained in a netconn + * Called from netconn_bind. + * + * @param m the api_msg_msg pointing to the connection and containing + * the IP address and port to bind to + */ +void +lwip_netconn_do_bind(void *m) +{ + struct api_msg *msg = (struct api_msg*)m; + + if (ERR_IS_FATAL(msg->conn->last_err)) { + msg->err = msg->conn->last_err; + } else { + msg->err = ERR_VAL; + if (msg->conn->pcb.tcp != NULL) { + switch (NETCONNTYPE_GROUP(msg->conn->type)) { +#if LWIP_RAW + case NETCONN_RAW: + msg->err = raw_bind(msg->conn->pcb.raw, API_EXPR_REF(msg->msg.bc.ipaddr)); + break; +#endif /* LWIP_RAW */ +#if LWIP_UDP + case NETCONN_UDP: + msg->err = udp_bind(msg->conn->pcb.udp, API_EXPR_REF(msg->msg.bc.ipaddr), msg->msg.bc.port); + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + msg->err = tcp_bind(msg->conn->pcb.tcp, API_EXPR_REF(msg->msg.bc.ipaddr), msg->msg.bc.port); + break; +#endif /* LWIP_TCP */ + default: + break; + } + } + } + TCPIP_APIMSG_ACK(msg); +} + +#if LWIP_TCP +/** + * TCP callback function if a connection (opened by tcp_connect/lwip_netconn_do_connect) has + * been established (or reset by the remote host). + * + * @see tcp.h (struct tcp_pcb.connected) for parameters and return values + */ +static err_t +lwip_netconn_do_connected(void *arg, struct tcp_pcb *pcb, err_t err) +{ + struct netconn *conn; + int was_blocking; + sys_sem_t* op_completed_sem = NULL; + + LWIP_UNUSED_ARG(pcb); + + conn = (struct netconn *)arg; + + if (conn == NULL) { + return ERR_VAL; + } + + LWIP_ASSERT("conn->state == NETCONN_CONNECT", conn->state == NETCONN_CONNECT); + LWIP_ASSERT("(conn->current_msg != NULL) || conn->in_non_blocking_connect", + (conn->current_msg != NULL) || IN_NONBLOCKING_CONNECT(conn)); + + if (conn->current_msg != NULL) { + conn->current_msg->err = err; + op_completed_sem = LWIP_API_MSG_SEM(conn->current_msg); + } + if ((NETCONNTYPE_GROUP(conn->type) == NETCONN_TCP) && (err == ERR_OK)) { + setup_tcp(conn); + } + was_blocking = !IN_NONBLOCKING_CONNECT(conn); + SET_NONBLOCKING_CONNECT(conn, 0); + LWIP_ASSERT("blocking connect state error", + (was_blocking && op_completed_sem != NULL) || + (!was_blocking && op_completed_sem == NULL)); + conn->current_msg = NULL; + conn->state = NETCONN_NONE; + NETCONN_SET_SAFE_ERR(conn, ERR_OK); + API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0); + + if (was_blocking) { + sys_sem_signal(op_completed_sem); + } + return ERR_OK; +} +#endif /* LWIP_TCP */ + +/** + * Connect a pcb contained inside a netconn + * Called from netconn_connect. + * + * @param m the api_msg_msg pointing to the connection and containing + * the IP address and port to connect to + */ +void +lwip_netconn_do_connect(void *m) +{ + struct api_msg *msg = (struct api_msg*)m; + + if (msg->conn->pcb.tcp == NULL) { + /* This may happen when calling netconn_connect() a second time */ + msg->err = ERR_CLSD; + } else { + switch (NETCONNTYPE_GROUP(msg->conn->type)) { +#if LWIP_RAW + case NETCONN_RAW: + msg->err = raw_connect(msg->conn->pcb.raw, API_EXPR_REF(msg->msg.bc.ipaddr)); + break; +#endif /* LWIP_RAW */ +#if LWIP_UDP + case NETCONN_UDP: + msg->err = udp_connect(msg->conn->pcb.udp, API_EXPR_REF(msg->msg.bc.ipaddr), msg->msg.bc.port); + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + /* Prevent connect while doing any other action. */ + if (msg->conn->state == NETCONN_CONNECT) { + msg->err = ERR_ALREADY; + } else if (msg->conn->state != NETCONN_NONE) { + msg->err = ERR_ISCONN; + } else { + setup_tcp(msg->conn); + msg->err = tcp_connect(msg->conn->pcb.tcp, API_EXPR_REF(msg->msg.bc.ipaddr), + msg->msg.bc.port, lwip_netconn_do_connected); + if (msg->err == ERR_OK) { + u8_t non_blocking = netconn_is_nonblocking(msg->conn); + msg->conn->state = NETCONN_CONNECT; + SET_NONBLOCKING_CONNECT(msg->conn, non_blocking); + if (non_blocking) { + msg->err = ERR_INPROGRESS; + } else { + msg->conn->current_msg = msg; + /* sys_sem_signal() is called from lwip_netconn_do_connected (or err_tcp()), + when the connection is established! */ +#if LWIP_TCPIP_CORE_LOCKING + LWIP_ASSERT("state!", msg->conn->state == NETCONN_CONNECT); + UNLOCK_TCPIP_CORE(); + sys_arch_sem_wait(LWIP_API_MSG_SEM(msg), 0); + LOCK_TCPIP_CORE(); + LWIP_ASSERT("state!", msg->conn->state != NETCONN_CONNECT); +#endif /* LWIP_TCPIP_CORE_LOCKING */ + return; + } + } + } + break; +#endif /* LWIP_TCP */ + default: + LWIP_ERROR("Invalid netconn type", 0, do{ msg->err = ERR_VAL; }while(0)); + break; + } + } + /* For all other protocols, netconn_connect() calls TCPIP_APIMSG(), + so use TCPIP_APIMSG_ACK() here. */ + TCPIP_APIMSG_ACK(msg); +} + +/** + * Disconnect a pcb contained inside a netconn + * Only used for UDP netconns. + * Called from netconn_disconnect. + * + * @param m the api_msg_msg pointing to the connection to disconnect + */ +void +lwip_netconn_do_disconnect(void *m) +{ + struct api_msg *msg = (struct api_msg*)m; + +#if LWIP_UDP + if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) { + udp_disconnect(msg->conn->pcb.udp); + msg->err = ERR_OK; + } else +#endif /* LWIP_UDP */ + { + msg->err = ERR_VAL; + } + TCPIP_APIMSG_ACK(msg); +} + +#if LWIP_TCP +/** + * Set a TCP pcb contained in a netconn into listen mode + * Called from netconn_listen. + * + * @param m the api_msg_msg pointing to the connection + */ +void +lwip_netconn_do_listen(void *m) +{ + struct api_msg *msg = (struct api_msg*)m; + + if (ERR_IS_FATAL(msg->conn->last_err)) { + msg->err = msg->conn->last_err; + } else { + msg->err = ERR_CONN; + if (msg->conn->pcb.tcp != NULL) { + if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) { + if (msg->conn->state == NETCONN_NONE) { + struct tcp_pcb* lpcb; + if (msg->conn->pcb.tcp->state != CLOSED) { + /* connection is not closed, cannot listen */ + msg->err = ERR_VAL; + } else { + err_t err; + u8_t backlog; +#if TCP_LISTEN_BACKLOG + backlog = msg->msg.lb.backlog; +#else /* TCP_LISTEN_BACKLOG */ + backlog = TCP_DEFAULT_LISTEN_BACKLOG; +#endif /* TCP_LISTEN_BACKLOG */ +#if LWIP_IPV4 && LWIP_IPV6 + /* "Socket API like" dual-stack support: If IP to listen to is IP6_ADDR_ANY, + * and NETCONN_FLAG_IPV6_V6ONLY is NOT set, use IP_ANY_TYPE to listen + */ + if (ip_addr_cmp(&msg->conn->pcb.ip->local_ip, IP6_ADDR_ANY) && + (netconn_get_ipv6only(msg->conn) == 0)) { + /* change PCB type to IPADDR_TYPE_ANY */ + IP_SET_TYPE_VAL(msg->conn->pcb.tcp->local_ip, IPADDR_TYPE_ANY); + IP_SET_TYPE_VAL(msg->conn->pcb.tcp->remote_ip, IPADDR_TYPE_ANY); + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + + lpcb = tcp_listen_with_backlog_and_err(msg->conn->pcb.tcp, backlog, &err); + + if (lpcb == NULL) { + /* in this case, the old pcb is still allocated */ + msg->err = err; + } else { + /* delete the recvmbox and allocate the acceptmbox */ + if (sys_mbox_valid(&msg->conn->recvmbox)) { + /** @todo: should we drain the recvmbox here? */ + sys_mbox_free(&msg->conn->recvmbox); + sys_mbox_set_invalid(&msg->conn->recvmbox); + } + msg->err = ERR_OK; + if (!sys_mbox_valid(&msg->conn->acceptmbox)) { + msg->err = sys_mbox_new(&msg->conn->acceptmbox, DEFAULT_ACCEPTMBOX_SIZE); + } + if (msg->err == ERR_OK) { + msg->conn->state = NETCONN_LISTEN; + msg->conn->pcb.tcp = lpcb; + tcp_arg(msg->conn->pcb.tcp, msg->conn); + tcp_accept(msg->conn->pcb.tcp, accept_function); + } else { + /* since the old pcb is already deallocated, free lpcb now */ + tcp_close(lpcb); + msg->conn->pcb.tcp = NULL; + } + } + } + } else if (msg->conn->state == NETCONN_LISTEN) { + /* already listening, allow updating of the backlog */ + msg->err = ERR_OK; + tcp_backlog_set(msg->conn->pcb.tcp, msg->msg.lb.backlog); + } + } else { + msg->err = ERR_ARG; + } + } + } + TCPIP_APIMSG_ACK(msg); +} +#endif /* LWIP_TCP */ + +/** + * Send some data on a RAW or UDP pcb contained in a netconn + * Called from netconn_send + * + * @param m the api_msg_msg pointing to the connection + */ +void +lwip_netconn_do_send(void *m) +{ + struct api_msg *msg = (struct api_msg*)m; + + if (ERR_IS_FATAL(msg->conn->last_err)) { + msg->err = msg->conn->last_err; + } else { + msg->err = ERR_CONN; + if (msg->conn->pcb.tcp != NULL) { + switch (NETCONNTYPE_GROUP(msg->conn->type)) { +#if LWIP_RAW + case NETCONN_RAW: + if (ip_addr_isany(&msg->msg.b->addr) || IP_IS_ANY_TYPE_VAL(msg->msg.b->addr)) { + msg->err = raw_send(msg->conn->pcb.raw, msg->msg.b->p); + } else { + msg->err = raw_sendto(msg->conn->pcb.raw, msg->msg.b->p, &msg->msg.b->addr); + } + break; +#endif +#if LWIP_UDP + case NETCONN_UDP: +#if LWIP_CHECKSUM_ON_COPY + if (ip_addr_isany(&msg->msg.b->addr) || IP_IS_ANY_TYPE_VAL(msg->msg.b->addr)) { + msg->err = udp_send_chksum(msg->conn->pcb.udp, msg->msg.b->p, + msg->msg.b->flags & NETBUF_FLAG_CHKSUM, msg->msg.b->toport_chksum); + } else { + msg->err = udp_sendto_chksum(msg->conn->pcb.udp, msg->msg.b->p, + &msg->msg.b->addr, msg->msg.b->port, + msg->msg.b->flags & NETBUF_FLAG_CHKSUM, msg->msg.b->toport_chksum); + } +#else /* LWIP_CHECKSUM_ON_COPY */ + if (ip_addr_isany_val(msg->msg.b->addr) || IP_IS_ANY_TYPE_VAL(msg->msg.b->addr)) { + msg->err = udp_send(msg->conn->pcb.udp, msg->msg.b->p); + } else { + msg->err = udp_sendto(msg->conn->pcb.udp, msg->msg.b->p, &msg->msg.b->addr, msg->msg.b->port); + } +#endif /* LWIP_CHECKSUM_ON_COPY */ + break; +#endif /* LWIP_UDP */ + default: + break; + } + } + } + TCPIP_APIMSG_ACK(msg); +} + +#if LWIP_TCP +/** + * Indicate data has been received from a TCP pcb contained in a netconn + * Called from netconn_recv + * + * @param m the api_msg_msg pointing to the connection + */ +void +lwip_netconn_do_recv(void *m) +{ + struct api_msg *msg = (struct api_msg*)m; + + msg->err = ERR_OK; + if (msg->conn->pcb.tcp != NULL) { + if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) { + u32_t remaining = msg->msg.r.len; + do { + u16_t recved = (remaining > 0xffff) ? 0xffff : (u16_t)remaining; + tcp_recved(msg->conn->pcb.tcp, recved); + remaining -= recved; + } while (remaining != 0); + } + } + TCPIP_APIMSG_ACK(msg); +} + +#if TCP_LISTEN_BACKLOG +/** Indicate that a TCP pcb has been accepted + * Called from netconn_accept + * + * @param m the api_msg_msg pointing to the connection + */ +void +lwip_netconn_do_accepted(void *m) +{ + struct api_msg *msg = (struct api_msg*)m; + + msg->err = ERR_OK; + if (msg->conn->pcb.tcp != NULL) { + if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) { + tcp_backlog_accepted(msg->conn->pcb.tcp); + } + } + TCPIP_APIMSG_ACK(msg); +} +#endif /* TCP_LISTEN_BACKLOG */ + +/** + * See if more data needs to be written from a previous call to netconn_write. + * Called initially from lwip_netconn_do_write. If the first call can't send all data + * (because of low memory or empty send-buffer), this function is called again + * from sent_tcp() or poll_tcp() to send more data. If all data is sent, the + * blocking application thread (waiting in netconn_write) is released. + * + * @param conn netconn (that is currently in state NETCONN_WRITE) to process + * @return ERR_OK + * ERR_MEM if LWIP_TCPIP_CORE_LOCKING=1 and sending hasn't yet finished + */ +static err_t +lwip_netconn_do_writemore(struct netconn *conn WRITE_DELAYED_PARAM) +{ + err_t err; + const void *dataptr; + u16_t len, available; + u8_t write_finished = 0; + size_t diff; + u8_t dontblock; + u8_t apiflags; + + LWIP_ASSERT("conn != NULL", conn != NULL); + LWIP_ASSERT("conn->state == NETCONN_WRITE", (conn->state == NETCONN_WRITE)); + LWIP_ASSERT("conn->current_msg != NULL", conn->current_msg != NULL); + LWIP_ASSERT("conn->pcb.tcp != NULL", conn->pcb.tcp != NULL); + LWIP_ASSERT("conn->write_offset < conn->current_msg->msg.w.len", + conn->write_offset < conn->current_msg->msg.w.len); + + apiflags = conn->current_msg->msg.w.apiflags; + dontblock = netconn_is_nonblocking(conn) || (apiflags & NETCONN_DONTBLOCK); + +#if LWIP_SO_SNDTIMEO + if ((conn->send_timeout != 0) && + ((s32_t)(sys_now() - conn->current_msg->msg.w.time_started) >= conn->send_timeout)) { + write_finished = 1; + if (conn->write_offset == 0) { + /* nothing has been written */ + err = ERR_WOULDBLOCK; + conn->current_msg->msg.w.len = 0; + } else { + /* partial write */ + err = ERR_OK; + conn->current_msg->msg.w.len = conn->write_offset; + conn->write_offset = 0; + } + } else +#endif /* LWIP_SO_SNDTIMEO */ + { + dataptr = (const u8_t*)conn->current_msg->msg.w.dataptr + conn->write_offset; + diff = conn->current_msg->msg.w.len - conn->write_offset; + if (diff > 0xffffUL) { /* max_u16_t */ + len = 0xffff; + apiflags |= TCP_WRITE_FLAG_MORE; + } else { + len = (u16_t)diff; + } + available = tcp_sndbuf(conn->pcb.tcp); + if (available < len) { + /* don't try to write more than sendbuf */ + len = available; + if (dontblock) { + if (!len) { + err = ERR_WOULDBLOCK; + goto err_mem; + } + } else { + apiflags |= TCP_WRITE_FLAG_MORE; + } + } + LWIP_ASSERT("lwip_netconn_do_writemore: invalid length!", ((conn->write_offset + len) <= conn->current_msg->msg.w.len)); + err = tcp_write(conn->pcb.tcp, dataptr, len, apiflags); + /* if OK or memory error, check available space */ + if ((err == ERR_OK) || (err == ERR_MEM)) { +err_mem: + if (dontblock && (len < conn->current_msg->msg.w.len)) { + /* non-blocking write did not write everything: mark the pcb non-writable + and let poll_tcp check writable space to mark the pcb writable again */ + API_EVENT(conn, NETCONN_EVT_SENDMINUS, len); + conn->flags |= NETCONN_FLAG_CHECK_WRITESPACE; + } else if ((tcp_sndbuf(conn->pcb.tcp) <= TCP_SNDLOWAT) || + (tcp_sndqueuelen(conn->pcb.tcp) >= TCP_SNDQUEUELOWAT)) { + /* The queued byte- or pbuf-count exceeds the configured low-water limit, + let select mark this pcb as non-writable. */ + API_EVENT(conn, NETCONN_EVT_SENDMINUS, len); + } + } + + if (err == ERR_OK) { + err_t out_err; + conn->write_offset += len; + if ((conn->write_offset == conn->current_msg->msg.w.len) || dontblock) { + /* return sent length */ + conn->current_msg->msg.w.len = conn->write_offset; + /* everything was written */ + write_finished = 1; + } + out_err = tcp_output(conn->pcb.tcp); + if (ERR_IS_FATAL(out_err) || (out_err == ERR_RTE)) { + /* If tcp_output fails with fatal error or no route is found, + don't try writing any more but return the error + to the application thread. */ + err = out_err; + write_finished = 1; + conn->current_msg->msg.w.len = 0; + } + } else if (err == ERR_MEM) { + /* If ERR_MEM, we wait for sent_tcp or poll_tcp to be called. + For blocking sockets, we do NOT return to the application + thread, since ERR_MEM is only a temporary error! Non-blocking + will remain non-writable until sent_tcp/poll_tcp is called */ + + /* tcp_write returned ERR_MEM, try tcp_output anyway */ + err_t out_err = tcp_output(conn->pcb.tcp); + if (ERR_IS_FATAL(out_err) || (out_err == ERR_RTE)) { + /* If tcp_output fails with fatal error or no route is found, + don't try writing any more but return the error + to the application thread. */ + err = out_err; + write_finished = 1; + conn->current_msg->msg.w.len = 0; + } else if (dontblock) { + /* non-blocking write is done on ERR_MEM */ + err = ERR_WOULDBLOCK; + write_finished = 1; + conn->current_msg->msg.w.len = 0; + } + } else { + /* On errors != ERR_MEM, we don't try writing any more but return + the error to the application thread. */ + write_finished = 1; + conn->current_msg->msg.w.len = 0; + } + } + if (write_finished) { + /* everything was written: set back connection state + and back to application task */ + sys_sem_t* op_completed_sem = LWIP_API_MSG_SEM(conn->current_msg); + conn->current_msg->err = err; + conn->current_msg = NULL; + conn->write_offset = 0; + conn->state = NETCONN_NONE; + NETCONN_SET_SAFE_ERR(conn, err); +#if LWIP_TCPIP_CORE_LOCKING + if (delayed) +#endif + { + sys_sem_signal(op_completed_sem); + } + } +#if LWIP_TCPIP_CORE_LOCKING + else { + return ERR_MEM; + } +#endif + return ERR_OK; +} +#endif /* LWIP_TCP */ + +/** + * Send some data on a TCP pcb contained in a netconn + * Called from netconn_write + * + * @param m the api_msg_msg pointing to the connection + */ +void +lwip_netconn_do_write(void *m) +{ + struct api_msg *msg = (struct api_msg*)m; + + if (ERR_IS_FATAL(msg->conn->last_err)) { + msg->err = msg->conn->last_err; + } else { + if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) { +#if LWIP_TCP + if (msg->conn->state != NETCONN_NONE) { + /* netconn is connecting, closing or in blocking write */ + msg->err = ERR_INPROGRESS; + } else if (msg->conn->pcb.tcp != NULL) { + msg->conn->state = NETCONN_WRITE; + /* set all the variables used by lwip_netconn_do_writemore */ + LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL && + msg->conn->write_offset == 0); + LWIP_ASSERT("msg->msg.w.len != 0", msg->msg.w.len != 0); + msg->conn->current_msg = msg; + msg->conn->write_offset = 0; +#if LWIP_TCPIP_CORE_LOCKING + if (lwip_netconn_do_writemore(msg->conn, 0) != ERR_OK) { + LWIP_ASSERT("state!", msg->conn->state == NETCONN_WRITE); + UNLOCK_TCPIP_CORE(); + sys_arch_sem_wait(LWIP_API_MSG_SEM(msg), 0); + LOCK_TCPIP_CORE(); + LWIP_ASSERT("state!", msg->conn->state != NETCONN_WRITE); + } +#else /* LWIP_TCPIP_CORE_LOCKING */ + lwip_netconn_do_writemore(msg->conn); +#endif /* LWIP_TCPIP_CORE_LOCKING */ + /* for both cases: if lwip_netconn_do_writemore was called, don't ACK the APIMSG + since lwip_netconn_do_writemore ACKs it! */ + return; + } else { + msg->err = ERR_CONN; + } +#else /* LWIP_TCP */ + msg->err = ERR_VAL; +#endif /* LWIP_TCP */ +#if (LWIP_UDP || LWIP_RAW) + } else { + msg->err = ERR_VAL; +#endif /* (LWIP_UDP || LWIP_RAW) */ + } + } + TCPIP_APIMSG_ACK(msg); +} + +/** + * Return a connection's local or remote address + * Called from netconn_getaddr + * + * @param m the api_msg_msg pointing to the connection + */ +void +lwip_netconn_do_getaddr(void *m) +{ + struct api_msg *msg = (struct api_msg*)m; + + if (msg->conn->pcb.ip != NULL) { + if (msg->msg.ad.local) { + ip_addr_copy(API_EXPR_DEREF(msg->msg.ad.ipaddr), + msg->conn->pcb.ip->local_ip); + } else { + ip_addr_copy(API_EXPR_DEREF(msg->msg.ad.ipaddr), + msg->conn->pcb.ip->remote_ip); + } + + msg->err = ERR_OK; + switch (NETCONNTYPE_GROUP(msg->conn->type)) { +#if LWIP_RAW + case NETCONN_RAW: + if (msg->msg.ad.local) { + API_EXPR_DEREF(msg->msg.ad.port) = msg->conn->pcb.raw->protocol; + } else { + /* return an error as connecting is only a helper for upper layers */ + msg->err = ERR_CONN; + } + break; +#endif /* LWIP_RAW */ +#if LWIP_UDP + case NETCONN_UDP: + if (msg->msg.ad.local) { + API_EXPR_DEREF(msg->msg.ad.port) = msg->conn->pcb.udp->local_port; + } else { + if ((msg->conn->pcb.udp->flags & UDP_FLAGS_CONNECTED) == 0) { + msg->err = ERR_CONN; + } else { + API_EXPR_DEREF(msg->msg.ad.port) = msg->conn->pcb.udp->remote_port; + } + } + break; +#endif /* LWIP_UDP */ +#if LWIP_TCP + case NETCONN_TCP: + if ((msg->msg.ad.local == 0) && + ((msg->conn->pcb.tcp->state == CLOSED) || (msg->conn->pcb.tcp->state == LISTEN))) { + /* pcb is not connected and remote name is requested */ + msg->err = ERR_CONN; + } else { + API_EXPR_DEREF(msg->msg.ad.port) = (msg->msg.ad.local ? msg->conn->pcb.tcp->local_port : msg->conn->pcb.tcp->remote_port); + } + break; +#endif /* LWIP_TCP */ + default: + LWIP_ASSERT("invalid netconn_type", 0); + break; + } + } else { + msg->err = ERR_CONN; + } + TCPIP_APIMSG_ACK(msg); +} + +/** + * Close or half-shutdown a TCP pcb contained in a netconn + * Called from netconn_close + * In contrast to closing sockets, the netconn is not deallocated. + * + * @param m the api_msg_msg pointing to the connection + */ +void +lwip_netconn_do_close(void *m) +{ + struct api_msg *msg = (struct api_msg*)m; + +#if LWIP_TCP + enum netconn_state state = msg->conn->state; + /* First check if this is a TCP netconn and if it is in a correct state + (LISTEN doesn't support half shutdown) */ + if ((msg->conn->pcb.tcp != NULL) && + (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_TCP) && + ((msg->msg.sd.shut == NETCONN_SHUT_RDWR) || (state != NETCONN_LISTEN))) { + /* Check if we are in a connected state */ + if (state == NETCONN_CONNECT) { + /* TCP connect in progress: cannot shutdown */ + msg->err = ERR_CONN; + } else if (state == NETCONN_WRITE) { +#if LWIP_NETCONN_FULLDUPLEX + if (msg->msg.sd.shut & NETCONN_SHUT_WR) { + /* close requested, abort running write */ + sys_sem_t* write_completed_sem; + LWIP_ASSERT("msg->conn->current_msg != NULL", msg->conn->current_msg != NULL); + write_completed_sem = LWIP_API_MSG_SEM(msg->conn->current_msg); + msg->conn->current_msg->err = ERR_CLSD; + msg->conn->current_msg = NULL; + msg->conn->write_offset = 0; + msg->conn->state = NETCONN_NONE; + state = NETCONN_NONE; + NETCONN_SET_SAFE_ERR(msg->conn, ERR_CLSD); + sys_sem_signal(write_completed_sem); + } else { + LWIP_ASSERT("msg->msg.sd.shut == NETCONN_SHUT_RD", msg->msg.sd.shut == NETCONN_SHUT_RD); + /* In this case, let the write continue and do not interfere with + conn->current_msg or conn->state! */ + msg->err = tcp_shutdown(msg->conn->pcb.tcp, 1, 0); + } + } + if (state == NETCONN_NONE) { +#else /* LWIP_NETCONN_FULLDUPLEX */ + msg->err = ERR_INPROGRESS; + } else { +#endif /* LWIP_NETCONN_FULLDUPLEX */ + if (msg->msg.sd.shut & NETCONN_SHUT_RD) { + /* Drain and delete mboxes */ + netconn_drain(msg->conn); + } + LWIP_ASSERT("already writing or closing", msg->conn->current_msg == NULL && + msg->conn->write_offset == 0); + msg->conn->state = NETCONN_CLOSE; + msg->conn->current_msg = msg; +#if LWIP_TCPIP_CORE_LOCKING + if (lwip_netconn_do_close_internal(msg->conn, 0) != ERR_OK) { + LWIP_ASSERT("state!", msg->conn->state == NETCONN_CLOSE); + UNLOCK_TCPIP_CORE(); + sys_arch_sem_wait(LWIP_API_MSG_SEM(msg), 0); + LOCK_TCPIP_CORE(); + LWIP_ASSERT("state!", msg->conn->state == NETCONN_NONE); + } +#else /* LWIP_TCPIP_CORE_LOCKING */ + lwip_netconn_do_close_internal(msg->conn); +#endif /* LWIP_TCPIP_CORE_LOCKING */ + /* for tcp netconns, lwip_netconn_do_close_internal ACKs the message */ + return; + } + } else +#endif /* LWIP_TCP */ + { + msg->err = ERR_CONN; + } + TCPIP_APIMSG_ACK(msg); +} + +#if LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) +/** + * Join multicast groups for UDP netconns. + * Called from netconn_join_leave_group + * + * @param m the api_msg_msg pointing to the connection + */ +void +lwip_netconn_do_join_leave_group(void *m) +{ + struct api_msg *msg = (struct api_msg*)m; + + if (ERR_IS_FATAL(msg->conn->last_err)) { + msg->err = msg->conn->last_err; + } else { + if (msg->conn->pcb.tcp != NULL) { + if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) { +#if LWIP_UDP +#if LWIP_IPV6 && LWIP_IPV6_MLD + if (NETCONNTYPE_ISIPV6(msg->conn->type)) { + if (msg->msg.jl.join_or_leave == NETCONN_JOIN) { + msg->err = mld6_joingroup(ip_2_ip6(API_EXPR_REF(msg->msg.jl.netif_addr)), + ip_2_ip6(API_EXPR_REF(msg->msg.jl.multiaddr))); + } else { + msg->err = mld6_leavegroup(ip_2_ip6(API_EXPR_REF(msg->msg.jl.netif_addr)), + ip_2_ip6(API_EXPR_REF(msg->msg.jl.multiaddr))); + } + } + else +#endif /* LWIP_IPV6 && LWIP_IPV6_MLD */ + { +#if LWIP_IGMP + if (msg->msg.jl.join_or_leave == NETCONN_JOIN) { + msg->err = igmp_joingroup(ip_2_ip4(API_EXPR_REF(msg->msg.jl.netif_addr)), + ip_2_ip4(API_EXPR_REF(msg->msg.jl.multiaddr))); + } else { + msg->err = igmp_leavegroup(ip_2_ip4(API_EXPR_REF(msg->msg.jl.netif_addr)), + ip_2_ip4(API_EXPR_REF(msg->msg.jl.multiaddr))); + } +#endif /* LWIP_IGMP */ + } +#endif /* LWIP_UDP */ +#if (LWIP_TCP || LWIP_RAW) + } else { + msg->err = ERR_VAL; +#endif /* (LWIP_TCP || LWIP_RAW) */ + } + } else { + msg->err = ERR_CONN; + } + } + TCPIP_APIMSG_ACK(msg); +} +#endif /* LWIP_IGMP || (LWIP_IPV6 && LWIP_IPV6_MLD) */ + +#if LWIP_DNS +/** + * Callback function that is called when DNS name is resolved + * (or on timeout). A waiting application thread is waked up by + * signaling the semaphore. + */ +static void +lwip_netconn_do_dns_found(const char *name, const ip_addr_t *ipaddr, void *arg) +{ + struct dns_api_msg *msg = (struct dns_api_msg*)arg; + + /* we trust the internal implementation to be correct :-) */ + LWIP_UNUSED_ARG(name); + + if (ipaddr == NULL) { + /* timeout or memory error */ + API_EXPR_DEREF(msg->err) = ERR_VAL; + } else { + /* address was resolved */ + API_EXPR_DEREF(msg->err) = ERR_OK; + API_EXPR_DEREF(msg->addr) = *ipaddr; + } + /* wake up the application task waiting in netconn_gethostbyname */ + sys_sem_signal(API_EXPR_REF_SEM(msg->sem)); +} + +/** + * Execute a DNS query + * Called from netconn_gethostbyname + * + * @param arg the dns_api_msg pointing to the query + */ +void +lwip_netconn_do_gethostbyname(void *arg) +{ + struct dns_api_msg *msg = (struct dns_api_msg*)arg; + u8_t addrtype = +#if LWIP_IPV4 && LWIP_IPV6 + msg->dns_addrtype; +#else + LWIP_DNS_ADDRTYPE_DEFAULT; +#endif + + API_EXPR_DEREF(msg->err) = dns_gethostbyname_addrtype(msg->name, + API_EXPR_REF(msg->addr), lwip_netconn_do_dns_found, msg, addrtype); + if (API_EXPR_DEREF(msg->err) != ERR_INPROGRESS) { + /* on error or immediate success, wake up the application + * task waiting in netconn_gethostbyname */ + sys_sem_signal(API_EXPR_REF_SEM(msg->sem)); + } +} +#endif /* LWIP_DNS */ + +#endif /* LWIP_NETCONN */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/err.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/err.c new file mode 100644 index 0000000..35e9c02 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/err.c @@ -0,0 +1,115 @@ +/** + * @file + * Error Management module + * + */ + +/* + * 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> + * + */ + +#include "lwip/err.h" +#include "lwip/def.h" +#include "lwip/sys.h" + +#include "lwip/errno.h" + +#if !NO_SYS +/** Table to quickly map an lwIP error (err_t) to a socket error + * by using -err as an index */ +static const int err_to_errno_table[] = { + 0, /* ERR_OK 0 No error, everything OK. */ + ENOMEM, /* ERR_MEM -1 Out of memory error. */ + ENOBUFS, /* ERR_BUF -2 Buffer error. */ + EWOULDBLOCK, /* ERR_TIMEOUT -3 Timeout */ + EHOSTUNREACH, /* ERR_RTE -4 Routing problem. */ + EINPROGRESS, /* ERR_INPROGRESS -5 Operation in progress */ + EINVAL, /* ERR_VAL -6 Illegal value. */ + EWOULDBLOCK, /* ERR_WOULDBLOCK -7 Operation would block. */ + EADDRINUSE, /* ERR_USE -8 Address in use. */ + EALREADY, /* ERR_ALREADY -9 Already connecting. */ + EISCONN, /* ERR_ISCONN -10 Conn already established.*/ + ENOTCONN, /* ERR_CONN -11 Not connected. */ + -1, /* ERR_IF -12 Low-level netif error */ + ECONNABORTED, /* ERR_ABRT -13 Connection aborted. */ + ECONNRESET, /* ERR_RST -14 Connection reset. */ + ENOTCONN, /* ERR_CLSD -15 Connection closed. */ + EIO /* ERR_ARG -16 Illegal argument. */ +}; + +int +err_to_errno(err_t err) +{ + if ((err > 0) || (-err >= (err_t)LWIP_ARRAYSIZE(err_to_errno_table))) { + return EIO; + } + return err_to_errno_table[-err]; +} +#endif /* !NO_SYS */ + +#ifdef LWIP_DEBUG + +static const char *err_strerr[] = { + "Ok.", /* ERR_OK 0 */ + "Out of memory error.", /* ERR_MEM -1 */ + "Buffer error.", /* ERR_BUF -2 */ + "Timeout.", /* ERR_TIMEOUT -3 */ + "Routing problem.", /* ERR_RTE -4 */ + "Operation in progress.", /* ERR_INPROGRESS -5 */ + "Illegal value.", /* ERR_VAL -6 */ + "Operation would block.", /* ERR_WOULDBLOCK -7 */ + "Address in use.", /* ERR_USE -8 */ + "Already connecting.", /* ERR_ALREADY -9 */ + "Already connected.", /* ERR_ISCONN -10 */ + "Not connected.", /* ERR_CONN -11 */ + "Low-level netif error.", /* ERR_IF -12 */ + "Connection aborted.", /* ERR_ABRT -13 */ + "Connection reset.", /* ERR_RST -14 */ + "Connection closed.", /* ERR_CLSD -15 */ + "Illegal argument." /* ERR_ARG -16 */ +}; + +/** + * Convert an lwip internal error to a string representation. + * + * @param err an lwip internal err_t + * @return a string representation for err + */ +const char * +lwip_strerr(err_t err) +{ + if ((err > 0) || (-err >= (err_t)LWIP_ARRAYSIZE(err_strerr))) { + return "Unknown error."; + } + return err_strerr[-err]; +} + +#endif /* LWIP_DEBUG */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/netbuf.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/netbuf.c new file mode 100644 index 0000000..eb25011 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/netbuf.c @@ -0,0 +1,246 @@ +/** + * @file + * Network buffer management + * + * @defgroup netbuf Network buffers + * @ingroup netconn + * Network buffer descriptor for @ref netconn. Based on @ref pbuf internally + * to avoid copying data around.\n + * Buffers must not be shared accross multiple threads, all functions except + * netbuf_new() and netbuf_delete() are not thread-safe. + */ + +/* + * 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> + * + */ + +#include "lwip/opt.h" + +#if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/netbuf.h" +#include "lwip/memp.h" + +#include <string.h> + +/** + * @ingroup netbuf + * Create (allocate) and initialize a new netbuf. + * The netbuf doesn't yet contain a packet buffer! + * + * @return a pointer to a new netbuf + * NULL on lack of memory + */ +struct +netbuf *netbuf_new(void) +{ + struct netbuf *buf; + + buf = (struct netbuf *)memp_malloc(MEMP_NETBUF); + if (buf != NULL) { + memset(buf, 0, sizeof(struct netbuf)); + } + return buf; +} + +/** + * @ingroup netbuf + * Deallocate a netbuf allocated by netbuf_new(). + * + * @param buf pointer to a netbuf allocated by netbuf_new() + */ +void +netbuf_delete(struct netbuf *buf) +{ + if (buf != NULL) { + if (buf->p != NULL) { + pbuf_free(buf->p); + buf->p = buf->ptr = NULL; + } + memp_free(MEMP_NETBUF, buf); + } +} + +/** + * @ingroup netbuf + * Allocate memory for a packet buffer for a given netbuf. + * + * @param buf the netbuf for which to allocate a packet buffer + * @param size the size of the packet buffer to allocate + * @return pointer to the allocated memory + * NULL if no memory could be allocated + */ +void * +netbuf_alloc(struct netbuf *buf, u16_t size) +{ + LWIP_ERROR("netbuf_alloc: invalid buf", (buf != NULL), return NULL;); + + /* Deallocate any previously allocated memory. */ + if (buf->p != NULL) { + pbuf_free(buf->p); + } + buf->p = pbuf_alloc(PBUF_TRANSPORT, size, PBUF_RAM); + if (buf->p == NULL) { + return NULL; + } + LWIP_ASSERT("check that first pbuf can hold size", + (buf->p->len >= size)); + buf->ptr = buf->p; + return buf->p->payload; +} + +/** + * @ingroup netbuf + * Free the packet buffer included in a netbuf + * + * @param buf pointer to the netbuf which contains the packet buffer to free + */ +void +netbuf_free(struct netbuf *buf) +{ + LWIP_ERROR("netbuf_free: invalid buf", (buf != NULL), return;); + if (buf->p != NULL) { + pbuf_free(buf->p); + } + buf->p = buf->ptr = NULL; +} + +/** + * @ingroup netbuf + * Let a netbuf reference existing (non-volatile) data. + * + * @param buf netbuf which should reference the data + * @param dataptr pointer to the data to reference + * @param size size of the data + * @return ERR_OK if data is referenced + * ERR_MEM if data couldn't be referenced due to lack of memory + */ +err_t +netbuf_ref(struct netbuf *buf, const void *dataptr, u16_t size) +{ + LWIP_ERROR("netbuf_ref: invalid buf", (buf != NULL), return ERR_ARG;); + if (buf->p != NULL) { + pbuf_free(buf->p); + } + buf->p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_REF); + if (buf->p == NULL) { + buf->ptr = NULL; + return ERR_MEM; + } + ((struct pbuf_rom*)buf->p)->payload = dataptr; + buf->p->len = buf->p->tot_len = size; + buf->ptr = buf->p; + return ERR_OK; +} + +/** + * @ingroup netbuf + * Chain one netbuf to another (@see pbuf_chain) + * + * @param head the first netbuf + * @param tail netbuf to chain after head, freed by this function, may not be reference after returning + */ +void +netbuf_chain(struct netbuf *head, struct netbuf *tail) +{ + LWIP_ERROR("netbuf_chain: invalid head", (head != NULL), return;); + LWIP_ERROR("netbuf_chain: invalid tail", (tail != NULL), return;); + pbuf_cat(head->p, tail->p); + head->ptr = head->p; + memp_free(MEMP_NETBUF, tail); +} + +/** + * @ingroup netbuf + * Get the data pointer and length of the data inside a netbuf. + * + * @param buf netbuf to get the data from + * @param dataptr pointer to a void pointer where to store the data pointer + * @param len pointer to an u16_t where the length of the data is stored + * @return ERR_OK if the information was retrieved, + * ERR_BUF on error. + */ +err_t +netbuf_data(struct netbuf *buf, void **dataptr, u16_t *len) +{ + LWIP_ERROR("netbuf_data: invalid buf", (buf != NULL), return ERR_ARG;); + LWIP_ERROR("netbuf_data: invalid dataptr", (dataptr != NULL), return ERR_ARG;); + LWIP_ERROR("netbuf_data: invalid len", (len != NULL), return ERR_ARG;); + + if (buf->ptr == NULL) { + return ERR_BUF; + } + *dataptr = buf->ptr->payload; + *len = buf->ptr->len; + return ERR_OK; +} + +/** + * @ingroup netbuf + * Move the current data pointer of a packet buffer contained in a netbuf + * to the next part. + * The packet buffer itself is not modified. + * + * @param buf the netbuf to modify + * @return -1 if there is no next part + * 1 if moved to the next part but now there is no next part + * 0 if moved to the next part and there are still more parts + */ +s8_t +netbuf_next(struct netbuf *buf) +{ + LWIP_ERROR("netbuf_next: invalid buf", (buf != NULL), return -1;); + if (buf->ptr->next == NULL) { + return -1; + } + buf->ptr = buf->ptr->next; + if (buf->ptr->next == NULL) { + return 1; + } + return 0; +} + +/** + * @ingroup netbuf + * Move the current data pointer of a packet buffer contained in a netbuf + * to the beginning of the packet. + * The packet buffer itself is not modified. + * + * @param buf the netbuf to modify + */ +void +netbuf_first(struct netbuf *buf) +{ + LWIP_ERROR("netbuf_first: invalid buf", (buf != NULL), return;); + buf->ptr = buf->p; +} + +#endif /* LWIP_NETCONN */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/netdb.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/netdb.c new file mode 100644 index 0000000..ccd9586 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/netdb.c @@ -0,0 +1,413 @@ +/** + * @file + * API functions for name resolving + * + * @defgroup netdbapi NETDB API + * @ingroup socket + */ + +/* + * 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: Simon Goldschmidt + * + */ + +#include "lwip/netdb.h" + +#if LWIP_DNS && LWIP_SOCKET + +#include "lwip/err.h" +#include "lwip/mem.h" +#include "lwip/memp.h" +#include "lwip/ip_addr.h" +#include "lwip/api.h" +#include "lwip/dns.h" + +#include <string.h> /* memset */ +#include <stdlib.h> /* atoi */ + +/** helper struct for gethostbyname_r to access the char* buffer */ +struct gethostbyname_r_helper { + ip_addr_t *addr_list[2]; + ip_addr_t addr; + char *aliases; +}; + +/** h_errno is exported in netdb.h for access by applications. */ +#if LWIP_DNS_API_DECLARE_H_ERRNO +int h_errno; +#endif /* LWIP_DNS_API_DECLARE_H_ERRNO */ + +/** define "hostent" variables storage: 0 if we use a static (but unprotected) + * set of variables for lwip_gethostbyname, 1 if we use a local storage */ +#ifndef LWIP_DNS_API_HOSTENT_STORAGE +#define LWIP_DNS_API_HOSTENT_STORAGE 0 +#endif + +/** define "hostent" variables storage */ +#if LWIP_DNS_API_HOSTENT_STORAGE +#define HOSTENT_STORAGE +#else +#define HOSTENT_STORAGE static +#endif /* LWIP_DNS_API_STATIC_HOSTENT */ + +/** + * Returns an entry containing addresses of address family AF_INET + * for the host with name name. + * Due to dns_gethostbyname limitations, only one address is returned. + * + * @param name the hostname to resolve + * @return an entry containing addresses of address family AF_INET + * for the host with name name + */ +struct hostent* +lwip_gethostbyname(const char *name) +{ + err_t err; + ip_addr_t addr; + + /* buffer variables for lwip_gethostbyname() */ + HOSTENT_STORAGE struct hostent s_hostent; + HOSTENT_STORAGE char *s_aliases; + HOSTENT_STORAGE ip_addr_t s_hostent_addr; + HOSTENT_STORAGE ip_addr_t *s_phostent_addr[2]; + HOSTENT_STORAGE char s_hostname[DNS_MAX_NAME_LENGTH + 1]; + + /* query host IP address */ + err = netconn_gethostbyname(name, &addr); + if (err != ERR_OK) { + LWIP_DEBUGF(DNS_DEBUG, ("lwip_gethostbyname(%s) failed, err=%d\n", name, err)); + h_errno = HOST_NOT_FOUND; + return NULL; + } + + /* fill hostent */ + s_hostent_addr = addr; + s_phostent_addr[0] = &s_hostent_addr; + s_phostent_addr[1] = NULL; + strncpy(s_hostname, name, DNS_MAX_NAME_LENGTH); + s_hostname[DNS_MAX_NAME_LENGTH] = 0; + s_hostent.h_name = s_hostname; + s_aliases = NULL; + s_hostent.h_aliases = &s_aliases; + s_hostent.h_addrtype = AF_INET; + s_hostent.h_length = sizeof(ip_addr_t); + s_hostent.h_addr_list = (char**)&s_phostent_addr; + +#if DNS_DEBUG + /* dump hostent */ + LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_name == %s\n", s_hostent.h_name)); + LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_aliases == %p\n", (void*)s_hostent.h_aliases)); + /* h_aliases are always empty */ + LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addrtype == %d\n", s_hostent.h_addrtype)); + LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_length == %d\n", s_hostent.h_length)); + LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addr_list == %p\n", (void*)s_hostent.h_addr_list)); + if (s_hostent.h_addr_list != NULL) { + u8_t idx; + for (idx=0; s_hostent.h_addr_list[idx]; idx++) { + LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addr_list[%i] == %p\n", idx, s_hostent.h_addr_list[idx])); + LWIP_DEBUGF(DNS_DEBUG, ("hostent.h_addr_list[%i]-> == %s\n", idx, ipaddr_ntoa((ip_addr_t*)s_hostent.h_addr_list[idx]))); + } + } +#endif /* DNS_DEBUG */ + +#if LWIP_DNS_API_HOSTENT_STORAGE + /* this function should return the "per-thread" hostent after copy from s_hostent */ + return sys_thread_hostent(&s_hostent); +#else + return &s_hostent; +#endif /* LWIP_DNS_API_HOSTENT_STORAGE */ +} + +/** + * Thread-safe variant of lwip_gethostbyname: instead of using a static + * buffer, this function takes buffer and errno pointers as arguments + * and uses these for the result. + * + * @param name the hostname to resolve + * @param ret pre-allocated struct where to store the result + * @param buf pre-allocated buffer where to store additional data + * @param buflen the size of buf + * @param result pointer to a hostent pointer that is set to ret on success + * and set to zero on error + * @param h_errnop pointer to an int where to store errors (instead of modifying + * the global h_errno) + * @return 0 on success, non-zero on error, additional error information + * is stored in *h_errnop instead of h_errno to be thread-safe + */ +int +lwip_gethostbyname_r(const char *name, struct hostent *ret, char *buf, + size_t buflen, struct hostent **result, int *h_errnop) +{ + err_t err; + struct gethostbyname_r_helper *h; + char *hostname; + size_t namelen; + int lh_errno; + + if (h_errnop == NULL) { + /* ensure h_errnop is never NULL */ + h_errnop = &lh_errno; + } + + if (result == NULL) { + /* not all arguments given */ + *h_errnop = EINVAL; + return -1; + } + /* first thing to do: set *result to nothing */ + *result = NULL; + if ((name == NULL) || (ret == NULL) || (buf == NULL)) { + /* not all arguments given */ + *h_errnop = EINVAL; + return -1; + } + + namelen = strlen(name); + if (buflen < (sizeof(struct gethostbyname_r_helper) + namelen + 1 + (MEM_ALIGNMENT - 1))) { + /* buf can't hold the data needed + a copy of name */ + *h_errnop = ERANGE; + return -1; + } + + h = (struct gethostbyname_r_helper*)LWIP_MEM_ALIGN(buf); + hostname = ((char*)h) + sizeof(struct gethostbyname_r_helper); + + /* query host IP address */ + err = netconn_gethostbyname(name, &h->addr); + if (err != ERR_OK) { + LWIP_DEBUGF(DNS_DEBUG, ("lwip_gethostbyname(%s) failed, err=%d\n", name, err)); + *h_errnop = HOST_NOT_FOUND; + return -1; + } + + /* copy the hostname into buf */ + MEMCPY(hostname, name, namelen); + hostname[namelen] = 0; + + /* fill hostent */ + h->addr_list[0] = &h->addr; + h->addr_list[1] = NULL; + h->aliases = NULL; + ret->h_name = hostname; + ret->h_aliases = &h->aliases; + ret->h_addrtype = AF_INET; + ret->h_length = sizeof(ip_addr_t); + ret->h_addr_list = (char**)&h->addr_list; + + /* set result != NULL */ + *result = ret; + + /* return success */ + return 0; +} + +/** + * Frees one or more addrinfo structures returned by getaddrinfo(), along with + * any additional storage associated with those structures. If the ai_next field + * of the structure is not null, the entire list of structures is freed. + * + * @param ai struct addrinfo to free + */ +void +lwip_freeaddrinfo(struct addrinfo *ai) +{ + struct addrinfo *next; + + while (ai != NULL) { + next = ai->ai_next; + memp_free(MEMP_NETDB, ai); + ai = next; + } +} + +/** + * Translates the name of a service location (for example, a host name) and/or + * a service name and returns a set of socket addresses and associated + * information to be used in creating a socket with which to address the + * specified service. + * Memory for the result is allocated internally and must be freed by calling + * lwip_freeaddrinfo()! + * + * Due to a limitation in dns_gethostbyname, only the first address of a + * host is returned. + * Also, service names are not supported (only port numbers)! + * + * @param nodename descriptive name or address string of the host + * (may be NULL -> local address) + * @param servname port number as string of NULL + * @param hints structure containing input values that set socktype and protocol + * @param res pointer to a pointer where to store the result (set to NULL on failure) + * @return 0 on success, non-zero on failure + * + * @todo: implement AI_V4MAPPED, AI_ADDRCONFIG + */ +int +lwip_getaddrinfo(const char *nodename, const char *servname, + const struct addrinfo *hints, struct addrinfo **res) +{ + err_t err; + ip_addr_t addr; + struct addrinfo *ai; + struct sockaddr_storage *sa = NULL; + int port_nr = 0; + size_t total_size; + size_t namelen = 0; + int ai_family; + + if (res == NULL) { + return EAI_FAIL; + } + *res = NULL; + if ((nodename == NULL) && (servname == NULL)) { + return EAI_NONAME; + } + + if (hints != NULL) { + ai_family = hints->ai_family; + if ((ai_family != AF_UNSPEC) +#if LWIP_IPV4 + && (ai_family != AF_INET) +#endif /* LWIP_IPV4 */ +#if LWIP_IPV6 + && (ai_family != AF_INET6) +#endif /* LWIP_IPV6 */ + ) { + return EAI_FAMILY; + } + } else { + ai_family = AF_UNSPEC; + } + + if (servname != NULL) { + /* service name specified: convert to port number + * @todo?: currently, only ASCII integers (port numbers) are supported (AI_NUMERICSERV)! */ + port_nr = atoi(servname); + if ((port_nr <= 0) || (port_nr > 0xffff)) { + return EAI_SERVICE; + } + } + + if (nodename != NULL) { + /* service location specified, try to resolve */ + if ((hints != NULL) && (hints->ai_flags & AI_NUMERICHOST)) { + /* no DNS lookup, just parse for an address string */ + if (!ipaddr_aton(nodename, &addr)) { + return EAI_NONAME; + } +#if LWIP_IPV4 && LWIP_IPV6 + if ((IP_IS_V6_VAL(addr) && ai_family == AF_INET) || + (IP_IS_V4_VAL(addr) && ai_family == AF_INET6)) { + return EAI_NONAME; + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + } else { +#if LWIP_IPV4 && LWIP_IPV6 + /* AF_UNSPEC: prefer IPv4 */ + u8_t type = NETCONN_DNS_IPV4_IPV6; + if (ai_family == AF_INET) { + type = NETCONN_DNS_IPV4; + } else if (ai_family == AF_INET6) { + type = NETCONN_DNS_IPV6; + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + err = netconn_gethostbyname_addrtype(nodename, &addr, type); + if (err != ERR_OK) { + return EAI_FAIL; + } + } + } else { + /* service location specified, use loopback address */ + if ((hints != NULL) && (hints->ai_flags & AI_PASSIVE)) { + ip_addr_set_any(ai_family == AF_INET6, &addr); + } else { + ip_addr_set_loopback(ai_family == AF_INET6, &addr); + } + } + + total_size = sizeof(struct addrinfo) + sizeof(struct sockaddr_storage); + if (nodename != NULL) { + namelen = strlen(nodename); + if (namelen > DNS_MAX_NAME_LENGTH) { + /* invalid name length */ + return EAI_FAIL; + } + LWIP_ASSERT("namelen is too long", total_size + namelen + 1 > total_size); + total_size += namelen + 1; + } + /* If this fails, please report to lwip-devel! :-) */ + LWIP_ASSERT("total_size <= NETDB_ELEM_SIZE: please report this!", + total_size <= NETDB_ELEM_SIZE); + ai = (struct addrinfo *)memp_malloc(MEMP_NETDB); + if (ai == NULL) { + return EAI_MEMORY; + } + memset(ai, 0, total_size); + /* cast through void* to get rid of alignment warnings */ + sa = (struct sockaddr_storage *)(void*)((u8_t*)ai + sizeof(struct addrinfo)); + if (IP_IS_V6_VAL(addr)) { +#if LWIP_IPV6 + struct sockaddr_in6 *sa6 = (struct sockaddr_in6*)sa; + /* set up sockaddr */ + inet6_addr_from_ip6addr(&sa6->sin6_addr, ip_2_ip6(&addr)); + sa6->sin6_family = AF_INET6; + sa6->sin6_len = sizeof(struct sockaddr_in6); + sa6->sin6_port = lwip_htons((u16_t)port_nr); + ai->ai_family = AF_INET6; +#endif /* LWIP_IPV6 */ + } else { +#if LWIP_IPV4 + struct sockaddr_in *sa4 = (struct sockaddr_in*)sa; + /* set up sockaddr */ + inet_addr_from_ip4addr(&sa4->sin_addr, ip_2_ip4(&addr)); + sa4->sin_family = AF_INET; + sa4->sin_len = sizeof(struct sockaddr_in); + sa4->sin_port = lwip_htons((u16_t)port_nr); + ai->ai_family = AF_INET; +#endif /* LWIP_IPV4 */ + } + + /* set up addrinfo */ + if (hints != NULL) { + /* copy socktype & protocol from hints if specified */ + ai->ai_socktype = hints->ai_socktype; + ai->ai_protocol = hints->ai_protocol; + } + if (nodename != NULL) { + /* copy nodename to canonname if specified */ + ai->ai_canonname = ((char*)ai + sizeof(struct addrinfo) + sizeof(struct sockaddr_storage)); + MEMCPY(ai->ai_canonname, nodename, namelen); + ai->ai_canonname[namelen] = 0; + } + ai->ai_addrlen = sizeof(struct sockaddr_storage); + ai->ai_addr = (struct sockaddr*)sa; + + *res = ai; + + return 0; +} + +#endif /* LWIP_DNS && LWIP_SOCKET */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/netifapi.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/netifapi.c new file mode 100644 index 0000000..fef05a3 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/netifapi.c @@ -0,0 +1,221 @@ +/** + * @file + * Network Interface Sequential API module + * + * @defgroup netifapi NETIF API + * @ingroup sequential_api + * Thread-safe functions to be called from non-TCPIP threads + * + * @defgroup netifapi_netif NETIF related + * @ingroup netifapi + * To be called from non-TCPIP threads + */ + +/* + * 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. + * + */ + +#include "lwip/opt.h" + +#if LWIP_NETIF_API /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/netifapi.h" +#include "lwip/memp.h" +#include "lwip/priv/tcpip_priv.h" + +#define NETIFAPI_VAR_REF(name) API_VAR_REF(name) +#define NETIFAPI_VAR_DECLARE(name) API_VAR_DECLARE(struct netifapi_msg, name) +#define NETIFAPI_VAR_ALLOC(name) API_VAR_ALLOC(struct netifapi_msg, MEMP_NETIFAPI_MSG, name, ERR_MEM) +#define NETIFAPI_VAR_FREE(name) API_VAR_FREE(MEMP_NETIFAPI_MSG, name) + +/** + * Call netif_add() inside the tcpip_thread context. + */ +static err_t +netifapi_do_netif_add(struct tcpip_api_call_data *m) +{ + /* cast through void* to silence alignment warnings. + * We know it works because the structs have been instantiated as struct netifapi_msg */ + struct netifapi_msg *msg = (struct netifapi_msg*)(void*)m; + + if (!netif_add( msg->netif, +#if LWIP_IPV4 + API_EXPR_REF(msg->msg.add.ipaddr), + API_EXPR_REF(msg->msg.add.netmask), + API_EXPR_REF(msg->msg.add.gw), +#endif /* LWIP_IPV4 */ + msg->msg.add.state, + msg->msg.add.init, + msg->msg.add.input)) { + return ERR_IF; + } else { + return ERR_OK; + } +} + +#if LWIP_IPV4 +/** + * Call netif_set_addr() inside the tcpip_thread context. + */ +static err_t +netifapi_do_netif_set_addr(struct tcpip_api_call_data *m) +{ + /* cast through void* to silence alignment warnings. + * We know it works because the structs have been instantiated as struct netifapi_msg */ + struct netifapi_msg *msg = (struct netifapi_msg*)(void*)m; + + netif_set_addr( msg->netif, + API_EXPR_REF(msg->msg.add.ipaddr), + API_EXPR_REF(msg->msg.add.netmask), + API_EXPR_REF(msg->msg.add.gw)); + return ERR_OK; +} +#endif /* LWIP_IPV4 */ + +/** + * Call the "errtfunc" (or the "voidfunc" if "errtfunc" is NULL) inside the + * tcpip_thread context. + */ +static err_t +netifapi_do_netif_common(struct tcpip_api_call_data *m) +{ + /* cast through void* to silence alignment warnings. + * We know it works because the structs have been instantiated as struct netifapi_msg */ + struct netifapi_msg *msg = (struct netifapi_msg*)(void*)m; + + if (msg->msg.common.errtfunc != NULL) { + return msg->msg.common.errtfunc(msg->netif); + } else { + msg->msg.common.voidfunc(msg->netif); + return ERR_OK; + } +} + +/** + * @ingroup netifapi_netif + * Call netif_add() in a thread-safe way by running that function inside the + * tcpip_thread context. + * + * @note for params @see netif_add() + */ +err_t +netifapi_netif_add(struct netif *netif, +#if LWIP_IPV4 + const ip4_addr_t *ipaddr, const ip4_addr_t *netmask, const ip4_addr_t *gw, +#endif /* LWIP_IPV4 */ + void *state, netif_init_fn init, netif_input_fn input) +{ + err_t err; + NETIFAPI_VAR_DECLARE(msg); + NETIFAPI_VAR_ALLOC(msg); + +#if LWIP_IPV4 + if (ipaddr == NULL) { + ipaddr = IP4_ADDR_ANY4; + } + if (netmask == NULL) { + netmask = IP4_ADDR_ANY4; + } + if (gw == NULL) { + gw = IP4_ADDR_ANY4; + } +#endif /* LWIP_IPV4 */ + + NETIFAPI_VAR_REF(msg).netif = netif; +#if LWIP_IPV4 + NETIFAPI_VAR_REF(msg).msg.add.ipaddr = NETIFAPI_VAR_REF(ipaddr); + NETIFAPI_VAR_REF(msg).msg.add.netmask = NETIFAPI_VAR_REF(netmask); + NETIFAPI_VAR_REF(msg).msg.add.gw = NETIFAPI_VAR_REF(gw); +#endif /* LWIP_IPV4 */ + NETIFAPI_VAR_REF(msg).msg.add.state = state; + NETIFAPI_VAR_REF(msg).msg.add.init = init; + NETIFAPI_VAR_REF(msg).msg.add.input = input; + err = tcpip_api_call(netifapi_do_netif_add, &API_VAR_REF(msg).call); + NETIFAPI_VAR_FREE(msg); + return err; +} + +#if LWIP_IPV4 +/** + * @ingroup netifapi_netif + * Call netif_set_addr() in a thread-safe way by running that function inside the + * tcpip_thread context. + * + * @note for params @see netif_set_addr() + */ +err_t +netifapi_netif_set_addr(struct netif *netif, + const ip4_addr_t *ipaddr, + const ip4_addr_t *netmask, + const ip4_addr_t *gw) +{ + err_t err; + NETIFAPI_VAR_DECLARE(msg); + NETIFAPI_VAR_ALLOC(msg); + + if (ipaddr == NULL) { + ipaddr = IP4_ADDR_ANY4; + } + if (netmask == NULL) { + netmask = IP4_ADDR_ANY4; + } + if (gw == NULL) { + gw = IP4_ADDR_ANY4; + } + + NETIFAPI_VAR_REF(msg).netif = netif; + NETIFAPI_VAR_REF(msg).msg.add.ipaddr = NETIFAPI_VAR_REF(ipaddr); + NETIFAPI_VAR_REF(msg).msg.add.netmask = NETIFAPI_VAR_REF(netmask); + NETIFAPI_VAR_REF(msg).msg.add.gw = NETIFAPI_VAR_REF(gw); + err = tcpip_api_call(netifapi_do_netif_set_addr, &API_VAR_REF(msg).call); + NETIFAPI_VAR_FREE(msg); + return err; +} +#endif /* LWIP_IPV4 */ + +/** + * call the "errtfunc" (or the "voidfunc" if "errtfunc" is NULL) in a thread-safe + * way by running that function inside the tcpip_thread context. + * + * @note use only for functions where there is only "netif" parameter. + */ +err_t +netifapi_netif_common(struct netif *netif, netifapi_void_fn voidfunc, + netifapi_errt_fn errtfunc) +{ + err_t err; + NETIFAPI_VAR_DECLARE(msg); + NETIFAPI_VAR_ALLOC(msg); + + NETIFAPI_VAR_REF(msg).netif = netif; + NETIFAPI_VAR_REF(msg).msg.common.voidfunc = voidfunc; + NETIFAPI_VAR_REF(msg).msg.common.errtfunc = errtfunc; + err = tcpip_api_call(netifapi_do_netif_common, &API_VAR_REF(msg).call); + NETIFAPI_VAR_FREE(msg); + return err; +} + +#endif /* LWIP_NETIF_API */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/pppapi.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/pppapi.c new file mode 100644 index 0000000..5ba190e --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/pppapi.c @@ -0,0 +1,416 @@ +/** + * @file + * Point To Point Protocol Sequential API module + * + */ + +/* + * 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. + * + */ + +#include "lwip/opt.h" + +#if LWIP_PPP_API /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/pppapi.h" +#include "lwip/tcpip.h" +#include "netif/ppp/pppoe.h" +#include "netif/ppp/pppol2tp.h" +#include "netif/ppp/pppos.h" + +/** + * Call ppp_set_default() inside the tcpip_thread context. + */ +static void +pppapi_do_ppp_set_default(struct pppapi_msg_msg *msg) +{ + ppp_set_default(msg->ppp); + TCPIP_PPPAPI_ACK(msg); +} + +/** + * Call ppp_set_default() in a thread-safe way by running that function inside the + * tcpip_thread context. + */ +void +pppapi_set_default(ppp_pcb *pcb) +{ + struct pppapi_msg msg; + msg.function = pppapi_do_ppp_set_default; + msg.msg.ppp = pcb; + TCPIP_PPPAPI(&msg); +} + + +/** + * Call ppp_set_auth() inside the tcpip_thread context. + */ +static void +pppapi_do_ppp_set_auth(struct pppapi_msg_msg *msg) +{ + ppp_set_auth(msg->ppp, msg->msg.setauth.authtype, + msg->msg.setauth.user, msg->msg.setauth.passwd); + TCPIP_PPPAPI_ACK(msg); +} + +/** + * Call ppp_set_auth() in a thread-safe way by running that function inside the + * tcpip_thread context. + */ +void +pppapi_set_auth(ppp_pcb *pcb, u8_t authtype, const char *user, const char *passwd) +{ + struct pppapi_msg msg; + msg.function = pppapi_do_ppp_set_auth; + msg.msg.ppp = pcb; + msg.msg.msg.setauth.authtype = authtype; + msg.msg.msg.setauth.user = user; + msg.msg.msg.setauth.passwd = passwd; + TCPIP_PPPAPI(&msg); +} + + +#if PPP_NOTIFY_PHASE +/** + * Call ppp_set_notify_phase_callback() inside the tcpip_thread context. + */ +static void +pppapi_do_ppp_set_notify_phase_callback(struct pppapi_msg_msg *msg) +{ + ppp_set_notify_phase_callback(msg->ppp, msg->msg.setnotifyphasecb.notify_phase_cb); + TCPIP_PPPAPI_ACK(msg); +} + +/** + * Call ppp_set_notify_phase_callback() in a thread-safe way by running that function inside the + * tcpip_thread context. + */ +void +pppapi_set_notify_phase_callback(ppp_pcb *pcb, ppp_notify_phase_cb_fn notify_phase_cb) +{ + struct pppapi_msg msg; + msg.function = pppapi_do_ppp_set_notify_phase_callback; + msg.msg.ppp = pcb; + msg.msg.msg.setnotifyphasecb.notify_phase_cb = notify_phase_cb; + TCPIP_PPPAPI(&msg); +} +#endif /* PPP_NOTIFY_PHASE */ + + +#if PPPOS_SUPPORT +/** + * Call pppos_create() inside the tcpip_thread context. + */ +static void +pppapi_do_pppos_create(struct pppapi_msg_msg *msg) +{ + msg->ppp = pppos_create(msg->msg.serialcreate.pppif, msg->msg.serialcreate.fd, + msg->msg.serialcreate.link_status_cb, msg->msg.serialcreate.ctx_cb); + TCPIP_PPPAPI_ACK(msg); +} + +/** + * Call pppos_create() in a thread-safe way by running that function inside the + * tcpip_thread context. + */ +ppp_pcb* +pppapi_pppos_create(struct netif *pppif, sio_fd_t fd, ppp_link_status_cb_fn link_status_cb, + void *ctx_cb) +{ + struct pppapi_msg msg; + msg.function = pppapi_do_pppos_create; + msg.msg.msg.serialcreate.pppif = pppif; + msg.msg.msg.serialcreate.fd = fd; + msg.msg.msg.serialcreate.link_status_cb = link_status_cb; + msg.msg.msg.serialcreate.ctx_cb = ctx_cb; + TCPIP_PPPAPI(&msg); + return msg.msg.ppp; +} +#endif /* PPPOS_SUPPORT */ + + +#if PPPOE_SUPPORT +/** + * Call pppoe_create() inside the tcpip_thread context. + */ +static void +pppapi_do_pppoe_create(struct pppapi_msg_msg *msg) +{ + + msg->ppp = pppoe_create(msg->msg.ethernetcreate.pppif, msg->msg.ethernetcreate.ethif, + msg->msg.ethernetcreate.service_name, msg->msg.ethernetcreate.concentrator_name, + msg->msg.ethernetcreate.link_status_cb, msg->msg.ethernetcreate.ctx_cb); + TCPIP_PPPAPI_ACK(msg); +} + +/** + * Call pppoe_create() in a thread-safe way by running that function inside the + * tcpip_thread context. + */ +ppp_pcb* +pppapi_pppoe_create(struct netif *pppif, struct netif *ethif, const char *service_name, + const char *concentrator_name, ppp_link_status_cb_fn link_status_cb, + void *ctx_cb) +{ + struct pppapi_msg msg; + msg.function = pppapi_do_pppoe_create; + msg.msg.msg.ethernetcreate.pppif = pppif; + msg.msg.msg.ethernetcreate.ethif = ethif; + msg.msg.msg.ethernetcreate.service_name = service_name; + msg.msg.msg.ethernetcreate.concentrator_name = concentrator_name; + msg.msg.msg.ethernetcreate.link_status_cb = link_status_cb; + msg.msg.msg.ethernetcreate.ctx_cb = ctx_cb; + TCPIP_PPPAPI(&msg); + return msg.msg.ppp; +} +#endif /* PPPOE_SUPPORT */ + + +#if PPPOL2TP_SUPPORT +/** + * Call pppol2tp_create() inside the tcpip_thread context. + */ +static void +pppapi_do_pppol2tp_create(struct pppapi_msg_msg *msg) +{ + msg->ppp = pppol2tp_create(msg->msg.l2tpcreate.pppif, + msg->msg.l2tpcreate.netif, msg->msg.l2tpcreate.ipaddr, msg->msg.l2tpcreate.port, +#if PPPOL2TP_AUTH_SUPPORT + msg->msg.l2tpcreate.secret, + msg->msg.l2tpcreate.secret_len, +#else /* PPPOL2TP_AUTH_SUPPORT */ + NULL, +#endif /* PPPOL2TP_AUTH_SUPPORT */ + msg->msg.l2tpcreate.link_status_cb, msg->msg.l2tpcreate.ctx_cb); + TCPIP_PPPAPI_ACK(msg); +} + +/** + * Call pppol2tp_create() in a thread-safe way by running that function inside the + * tcpip_thread context. + */ +ppp_pcb* +pppapi_pppol2tp_create(struct netif *pppif, struct netif *netif, ip_addr_t *ipaddr, u16_t port, + u8_t *secret, u8_t secret_len, + ppp_link_status_cb_fn link_status_cb, void *ctx_cb) +{ + struct pppapi_msg msg; + msg.function = pppapi_do_pppol2tp_create; + msg.msg.msg.l2tpcreate.pppif = pppif; + msg.msg.msg.l2tpcreate.netif = netif; + msg.msg.msg.l2tpcreate.ipaddr = ipaddr; + msg.msg.msg.l2tpcreate.port = port; +#if PPPOL2TP_AUTH_SUPPORT + msg.msg.msg.l2tpcreate.secret = secret; + msg.msg.msg.l2tpcreate.secret_len = secret_len; +#endif /* PPPOL2TP_AUTH_SUPPORT */ + msg.msg.msg.l2tpcreate.link_status_cb = link_status_cb; + msg.msg.msg.l2tpcreate.ctx_cb = ctx_cb; + TCPIP_PPPAPI(&msg); + return msg.msg.ppp; +} + + +#if LWIP_IPV6 +/** + * Call pppol2tp_create_ip6() inside the tcpip_thread context. + */ +static void +pppapi_do_pppol2tp_create_ip6(struct pppapi_msg_msg *msg) +{ + msg->ppp = pppol2tp_create_ip6(msg->msg.l2tpcreateip6.pppif, + msg->msg.l2tpcreateip6.netif, msg->msg.l2tpcreateip6.ip6addr, msg->msg.l2tpcreateip6.port, +#if PPPOL2TP_AUTH_SUPPORT + msg->msg.l2tpcreateip6.secret, + msg->msg.l2tpcreateip6.secret_len, +#else /* PPPOL2TP_AUTH_SUPPORT */ + NULL, +#endif /* PPPOL2TP_AUTH_SUPPORT */ + msg->msg.l2tpcreateip6.link_status_cb, msg->msg.l2tpcreateip6.ctx_cb); + TCPIP_PPPAPI_ACK(msg); +} + +/** + * Call pppol2tp_create_ip6() in a thread-safe way by running that function inside the + * tcpip_thread context. + */ +ppp_pcb* +pppapi_pppol2tp_create_ip6(struct netif *pppif, struct netif *netif, ip6_addr_t *ip6addr, u16_t port, + u8_t *secret, u8_t secret_len, + ppp_link_status_cb_fn link_status_cb, void *ctx_cb) +{ + struct pppapi_msg msg; + msg.function = pppapi_do_pppol2tp_create_ip6; + msg.msg.msg.l2tpcreateip6.pppif = pppif; + msg.msg.msg.l2tpcreateip6.netif = netif; + msg.msg.msg.l2tpcreateip6.ip6addr = ip6addr; + msg.msg.msg.l2tpcreateip6.port = port; +#if PPPOL2TP_AUTH_SUPPORT + msg.msg.msg.l2tpcreateip6.secret = secret; + msg.msg.msg.l2tpcreateip6.secret_len = secret_len; +#endif /* PPPOL2TP_AUTH_SUPPORT */ + msg.msg.msg.l2tpcreateip6.link_status_cb = link_status_cb; + msg.msg.msg.l2tpcreateip6.ctx_cb = ctx_cb; + TCPIP_PPPAPI(&msg); + return msg.msg.ppp; +} +#endif /* LWIP_IPV6 */ +#endif /* PPPOL2TP_SUPPORT */ + + +/** + * Call ppp_connect() inside the tcpip_thread context. + */ +static void +pppapi_do_ppp_connect(struct pppapi_msg_msg *msg) +{ + msg->err = ppp_connect(msg->ppp, msg->msg.connect.holdoff); + TCPIP_PPPAPI_ACK(msg); +} + +/** + * Call ppp_connect() in a thread-safe way by running that function inside the + * tcpip_thread context. + */ +err_t +pppapi_connect(ppp_pcb *pcb, u16_t holdoff) +{ + struct pppapi_msg msg; + msg.function = pppapi_do_ppp_connect; + msg.msg.ppp = pcb; + msg.msg.msg.connect.holdoff = holdoff; + TCPIP_PPPAPI(&msg); + return msg.msg.err; +} + + +#if PPP_SERVER +/** + * Call ppp_listen() inside the tcpip_thread context. + */ +static void +pppapi_do_ppp_listen(struct pppapi_msg_msg *msg) +{ + msg->err = ppp_listen(msg->ppp, msg->msg.listen.addrs); + TCPIP_PPPAPI_ACK(msg); +} + +/** + * Call ppp_listen() in a thread-safe way by running that function inside the + * tcpip_thread context. + */ +err_t +pppapi_listen(ppp_pcb *pcb, struct ppp_addrs *addrs) +{ + struct pppapi_msg msg; + msg.function = pppapi_do_ppp_listen; + msg.msg.ppp = pcb; + msg.msg.msg.listen.addrs = addrs; + TCPIP_PPPAPI(&msg); + return msg.msg.err; +} +#endif /* PPP_SERVER */ + + +/** + * Call ppp_close() inside the tcpip_thread context. + */ +static void +pppapi_do_ppp_close(struct pppapi_msg_msg *msg) +{ + msg->err = ppp_close(msg->ppp, msg->msg.close.nocarrier); + TCPIP_PPPAPI_ACK(msg); +} + +/** + * Call ppp_close() in a thread-safe way by running that function inside the + * tcpip_thread context. + */ +err_t +pppapi_close(ppp_pcb *pcb, u8_t nocarrier) +{ + struct pppapi_msg msg; + msg.function = pppapi_do_ppp_close; + msg.msg.ppp = pcb; + msg.msg.msg.close.nocarrier = nocarrier; + TCPIP_PPPAPI(&msg); + return msg.msg.err; +} + + +/** + * Call ppp_free() inside the tcpip_thread context. + */ +static void +pppapi_do_ppp_free(struct pppapi_msg_msg *msg) +{ + msg->err = ppp_free(msg->ppp); + TCPIP_PPPAPI_ACK(msg); +} + +/** + * Call ppp_free() in a thread-safe way by running that function inside the + * tcpip_thread context. + */ +err_t +pppapi_free(ppp_pcb *pcb) +{ + struct pppapi_msg msg; + msg.function = pppapi_do_ppp_free; + msg.msg.ppp = pcb; + TCPIP_PPPAPI(&msg); + return msg.msg.err; +} + + +/** + * Call ppp_ioctl() inside the tcpip_thread context. + */ +static void +pppapi_do_ppp_ioctl(struct pppapi_msg_msg *msg) +{ + msg->err = ppp_ioctl(msg->ppp, msg->msg.ioctl.cmd, msg->msg.ioctl.arg); + TCPIP_PPPAPI_ACK(msg); +} + +/** + * Call ppp_ioctl() in a thread-safe way by running that function inside the + * tcpip_thread context. + */ +err_t +pppapi_ioctl(ppp_pcb *pcb, u8_t cmd, void *arg) +{ + struct pppapi_msg msg; + msg.function = pppapi_do_ppp_ioctl; + msg.msg.ppp = pcb; + msg.msg.msg.ioctl.cmd = cmd; + msg.msg.msg.ioctl.arg = arg; + TCPIP_PPPAPI(&msg); + return msg.msg.err; +} + + +#endif /* LWIP_PPP_API */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/sockets.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/sockets.c new file mode 100644 index 0000000..b763248 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/sockets.c @@ -0,0 +1,2827 @@ +/** + * @file + * Sockets BSD-Like API module + * + * @defgroup socket Socket API + * @ingroup sequential_api + * BSD-style socket API.\n + * Thread-safe, to be called from non-TCPIP threads only.\n + * Can be activated by defining @ref LWIP_SOCKET to 1.\n + * Header is in posix/sys/socket.h\b + */ + +/* + * 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> + * + * Improved by Marc Boucher <marc@mbsi.ca> and David Haas <dhaas@alum.rpi.edu> + * + */ + +#include "lwip/opt.h" + +#if LWIP_SOCKET /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/sockets.h" +#include "lwip/api.h" +#include "lwip/sys.h" +#include "lwip/igmp.h" +#include "lwip/inet.h" +#include "lwip/tcp.h" +#include "lwip/raw.h" +#include "lwip/udp.h" +#include "lwip/memp.h" +#include "lwip/pbuf.h" +#include "lwip/priv/tcpip_priv.h" +#if LWIP_CHECKSUM_ON_COPY +#include "lwip/inet_chksum.h" +#endif + +#include <string.h> + +/* If the netconn API is not required publicly, then we include the necessary + files here to get the implementation */ +#if !LWIP_NETCONN +#undef LWIP_NETCONN +#define LWIP_NETCONN 1 +#include "api_msg.c" +#include "api_lib.c" +#include "netbuf.c" +#undef LWIP_NETCONN +#define LWIP_NETCONN 0 +#endif + +#if LWIP_IPV4 +#define IP4ADDR_PORT_TO_SOCKADDR(sin, ipaddr, port) do { \ + (sin)->sin_len = sizeof(struct sockaddr_in); \ + (sin)->sin_family = AF_INET; \ + (sin)->sin_port = lwip_htons((port)); \ + inet_addr_from_ip4addr(&(sin)->sin_addr, ipaddr); \ + memset((sin)->sin_zero, 0, SIN_ZERO_LEN); }while(0) +#define SOCKADDR4_TO_IP4ADDR_PORT(sin, ipaddr, port) do { \ + inet_addr_to_ip4addr(ip_2_ip4(ipaddr), &((sin)->sin_addr)); \ + (port) = lwip_ntohs((sin)->sin_port); }while(0) +#endif /* LWIP_IPV4 */ + +#if LWIP_IPV6 +#define IP6ADDR_PORT_TO_SOCKADDR(sin6, ipaddr, port) do { \ + (sin6)->sin6_len = sizeof(struct sockaddr_in6); \ + (sin6)->sin6_family = AF_INET6; \ + (sin6)->sin6_port = lwip_htons((port)); \ + (sin6)->sin6_flowinfo = 0; \ + inet6_addr_from_ip6addr(&(sin6)->sin6_addr, ipaddr); \ + (sin6)->sin6_scope_id = 0; }while(0) +#define SOCKADDR6_TO_IP6ADDR_PORT(sin6, ipaddr, port) do { \ + inet6_addr_to_ip6addr(ip_2_ip6(ipaddr), &((sin6)->sin6_addr)); \ + (port) = lwip_ntohs((sin6)->sin6_port); }while(0) +#endif /* LWIP_IPV6 */ + +#if LWIP_IPV4 && LWIP_IPV6 +static void sockaddr_to_ipaddr_port(const struct sockaddr* sockaddr, ip_addr_t* ipaddr, u16_t* port); + +#define IS_SOCK_ADDR_LEN_VALID(namelen) (((namelen) == sizeof(struct sockaddr_in)) || \ + ((namelen) == sizeof(struct sockaddr_in6))) +#define IS_SOCK_ADDR_TYPE_VALID(name) (((name)->sa_family == AF_INET) || \ + ((name)->sa_family == AF_INET6)) +#define SOCK_ADDR_TYPE_MATCH(name, sock) \ + ((((name)->sa_family == AF_INET) && !(NETCONNTYPE_ISIPV6((sock)->conn->type))) || \ + (((name)->sa_family == AF_INET6) && (NETCONNTYPE_ISIPV6((sock)->conn->type)))) +#define IPADDR_PORT_TO_SOCKADDR(sockaddr, ipaddr, port) do { \ + if (IP_IS_V6(ipaddr)) { \ + IP6ADDR_PORT_TO_SOCKADDR((struct sockaddr_in6*)(void*)(sockaddr), ip_2_ip6(ipaddr), port); \ + } else { \ + IP4ADDR_PORT_TO_SOCKADDR((struct sockaddr_in*)(void*)(sockaddr), ip_2_ip4(ipaddr), port); \ + } } while(0) +#define SOCKADDR_TO_IPADDR_PORT(sockaddr, ipaddr, port) sockaddr_to_ipaddr_port(sockaddr, ipaddr, &(port)) +#define DOMAIN_TO_NETCONN_TYPE(domain, type) (((domain) == AF_INET) ? \ + (type) : (enum netconn_type)((type) | NETCONN_TYPE_IPV6)) +#elif LWIP_IPV6 /* LWIP_IPV4 && LWIP_IPV6 */ +#define IS_SOCK_ADDR_LEN_VALID(namelen) ((namelen) == sizeof(struct sockaddr_in6)) +#define IS_SOCK_ADDR_TYPE_VALID(name) ((name)->sa_family == AF_INET6) +#define SOCK_ADDR_TYPE_MATCH(name, sock) 1 +#define IPADDR_PORT_TO_SOCKADDR(sockaddr, ipaddr, port) \ + IP6ADDR_PORT_TO_SOCKADDR((struct sockaddr_in6*)(void*)(sockaddr), ip_2_ip6(ipaddr), port) +#define SOCKADDR_TO_IPADDR_PORT(sockaddr, ipaddr, port) \ + SOCKADDR6_TO_IP6ADDR_PORT((const struct sockaddr_in6*)(const void*)(sockaddr), ipaddr, port) +#define DOMAIN_TO_NETCONN_TYPE(domain, netconn_type) (netconn_type) +#else /*-> LWIP_IPV4: LWIP_IPV4 && LWIP_IPV6 */ +#define IS_SOCK_ADDR_LEN_VALID(namelen) ((namelen) == sizeof(struct sockaddr_in)) +#define IS_SOCK_ADDR_TYPE_VALID(name) ((name)->sa_family == AF_INET) +#define SOCK_ADDR_TYPE_MATCH(name, sock) 1 +#define IPADDR_PORT_TO_SOCKADDR(sockaddr, ipaddr, port) \ + IP4ADDR_PORT_TO_SOCKADDR((struct sockaddr_in*)(void*)(sockaddr), ip_2_ip4(ipaddr), port) +#define SOCKADDR_TO_IPADDR_PORT(sockaddr, ipaddr, port) \ + SOCKADDR4_TO_IP4ADDR_PORT((const struct sockaddr_in*)(const void*)(sockaddr), ipaddr, port) +#define DOMAIN_TO_NETCONN_TYPE(domain, netconn_type) (netconn_type) +#endif /* LWIP_IPV6 */ + +#define IS_SOCK_ADDR_TYPE_VALID_OR_UNSPEC(name) (((name)->sa_family == AF_UNSPEC) || \ + IS_SOCK_ADDR_TYPE_VALID(name)) +#define SOCK_ADDR_TYPE_MATCH_OR_UNSPEC(name, sock) (((name)->sa_family == AF_UNSPEC) || \ + SOCK_ADDR_TYPE_MATCH(name, sock)) +#define IS_SOCK_ADDR_ALIGNED(name) ((((mem_ptr_t)(name)) % 4) == 0) + + +#define LWIP_SOCKOPT_CHECK_OPTLEN(optlen, opttype) do { if ((optlen) < sizeof(opttype)) { return EINVAL; }}while(0) +#define LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, optlen, opttype) do { \ + LWIP_SOCKOPT_CHECK_OPTLEN(optlen, opttype); \ + if ((sock)->conn == NULL) { return EINVAL; } }while(0) +#define LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, optlen, opttype) do { \ + LWIP_SOCKOPT_CHECK_OPTLEN(optlen, opttype); \ + if (((sock)->conn == NULL) || ((sock)->conn->pcb.tcp == NULL)) { return EINVAL; } }while(0) +#define LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, opttype, netconntype) do { \ + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, optlen, opttype); \ + if (NETCONNTYPE_GROUP(netconn_type((sock)->conn)) != netconntype) { return ENOPROTOOPT; } }while(0) + + +#define LWIP_SETGETSOCKOPT_DATA_VAR_REF(name) API_VAR_REF(name) +#define LWIP_SETGETSOCKOPT_DATA_VAR_DECLARE(name) API_VAR_DECLARE(struct lwip_setgetsockopt_data, name) +#define LWIP_SETGETSOCKOPT_DATA_VAR_FREE(name) API_VAR_FREE(MEMP_SOCKET_SETGETSOCKOPT_DATA, name) +#if LWIP_MPU_COMPATIBLE +#define LWIP_SETGETSOCKOPT_DATA_VAR_ALLOC(name, sock) do { \ + name = (struct lwip_setgetsockopt_data *)memp_malloc(MEMP_SOCKET_SETGETSOCKOPT_DATA); \ + if (name == NULL) { \ + sock_set_errno(sock, ENOMEM); \ + return -1; \ + } }while(0) +#else /* LWIP_MPU_COMPATIBLE */ +#define LWIP_SETGETSOCKOPT_DATA_VAR_ALLOC(name, sock) +#endif /* LWIP_MPU_COMPATIBLE */ + +#if LWIP_SO_SNDRCVTIMEO_NONSTANDARD +#define LWIP_SO_SNDRCVTIMEO_OPTTYPE int +#define LWIP_SO_SNDRCVTIMEO_SET(optval, val) (*(int *)(optval) = (val)) +#define LWIP_SO_SNDRCVTIMEO_GET_MS(optval) ((s32_t)*(const int*)(optval)) +#else +#define LWIP_SO_SNDRCVTIMEO_OPTTYPE struct timeval +#define LWIP_SO_SNDRCVTIMEO_SET(optval, val) do { \ + s32_t loc = (val); \ + ((struct timeval *)(optval))->tv_sec = (loc) / 1000U; \ + ((struct timeval *)(optval))->tv_usec = ((loc) % 1000U) * 1000U; }while(0) +#define LWIP_SO_SNDRCVTIMEO_GET_MS(optval) ((((const struct timeval *)(optval))->tv_sec * 1000U) + (((const struct timeval *)(optval))->tv_usec / 1000U)) +#endif + +#define NUM_SOCKETS MEMP_NUM_NETCONN + +/** This is overridable for the rare case where more than 255 threads + * select on the same socket... + */ +#ifndef SELWAIT_T +#define SELWAIT_T u8_t +#endif + +/** Contains all internal pointers and states used for a socket */ +struct lwip_sock { + /** sockets currently are built on netconns, each socket has one netconn */ + struct netconn *conn; + /** data that was left from the previous read */ + void *lastdata; + /** offset in the data that was left from the previous read */ + u16_t lastoffset; + /** number of times data was received, set by event_callback(), + tested by the receive and select functions */ + s16_t rcvevent; + /** number of times data was ACKed (free send buffer), set by event_callback(), + tested by select */ + u16_t sendevent; + /** error happened for this socket, set by event_callback(), tested by select */ + u16_t errevent; + /** last error that occurred on this socket (in fact, all our errnos fit into an u8_t) */ + u8_t err; + /** counter of how many threads are waiting for this socket using select */ + SELWAIT_T select_waiting; +}; + +#if LWIP_NETCONN_SEM_PER_THREAD +#define SELECT_SEM_T sys_sem_t* +#define SELECT_SEM_PTR(sem) (sem) +#else /* LWIP_NETCONN_SEM_PER_THREAD */ +#define SELECT_SEM_T sys_sem_t +#define SELECT_SEM_PTR(sem) (&(sem)) +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + +/** Description for a task waiting in select */ +struct lwip_select_cb { + /** Pointer to the next waiting task */ + struct lwip_select_cb *next; + /** Pointer to the previous waiting task */ + struct lwip_select_cb *prev; + /** readset passed to select */ + fd_set *readset; + /** writeset passed to select */ + fd_set *writeset; + /** unimplemented: exceptset passed to select */ + fd_set *exceptset; + /** don't signal the same semaphore twice: set to 1 when signalled */ + int sem_signalled; + /** semaphore to wake up a task waiting for select */ + SELECT_SEM_T sem; +}; + +/** A struct sockaddr replacement that has the same alignment as sockaddr_in/ + * sockaddr_in6 if instantiated. + */ +union sockaddr_aligned { + struct sockaddr sa; +#if LWIP_IPV6 + struct sockaddr_in6 sin6; +#endif /* LWIP_IPV6 */ +#if LWIP_IPV4 + struct sockaddr_in sin; +#endif /* LWIP_IPV4 */ +}; + +#if LWIP_IGMP +/* Define the number of IPv4 multicast memberships, default is one per socket */ +#ifndef LWIP_SOCKET_MAX_MEMBERSHIPS +#define LWIP_SOCKET_MAX_MEMBERSHIPS NUM_SOCKETS +#endif + +/* This is to keep track of IP_ADD_MEMBERSHIP calls to drop the membership when + a socket is closed */ +struct lwip_socket_multicast_pair { + /** the socket */ + struct lwip_sock* sock; + /** the interface address */ + ip4_addr_t if_addr; + /** the group address */ + ip4_addr_t multi_addr; +}; + +struct lwip_socket_multicast_pair socket_ipv4_multicast_memberships[LWIP_SOCKET_MAX_MEMBERSHIPS]; + +static int lwip_socket_register_membership(int s, const ip4_addr_t *if_addr, const ip4_addr_t *multi_addr); +static void lwip_socket_unregister_membership(int s, const ip4_addr_t *if_addr, const ip4_addr_t *multi_addr); +static void lwip_socket_drop_registered_memberships(int s); +#endif /* LWIP_IGMP */ + +/** The global array of available sockets */ +static struct lwip_sock sockets[NUM_SOCKETS]; +/** The global list of tasks waiting for select */ +static struct lwip_select_cb *select_cb_list; +/** This counter is increased from lwip_select when the list is changed + and checked in event_callback to see if it has changed. */ +static volatile int select_cb_ctr; + +#if LWIP_SOCKET_SET_ERRNO +#ifndef set_errno +#define set_errno(err) do { if (err) { errno = (err); } } while(0) +#endif +#else /* LWIP_SOCKET_SET_ERRNO */ +#define set_errno(err) +#endif /* LWIP_SOCKET_SET_ERRNO */ + +#define sock_set_errno(sk, e) do { \ + const int sockerr = (e); \ + sk->err = (u8_t)sockerr; \ + set_errno(sockerr); \ +} while (0) + +/* Forward declaration of some functions */ +static void event_callback(struct netconn *conn, enum netconn_evt evt, u16_t len); +#if !LWIP_TCPIP_CORE_LOCKING +static void lwip_getsockopt_callback(void *arg); +static void lwip_setsockopt_callback(void *arg); +#endif +static u8_t lwip_getsockopt_impl(int s, int level, int optname, void *optval, socklen_t *optlen); +static u8_t lwip_setsockopt_impl(int s, int level, int optname, const void *optval, socklen_t optlen); + +#if LWIP_IPV4 && LWIP_IPV6 +static void +sockaddr_to_ipaddr_port(const struct sockaddr* sockaddr, ip_addr_t* ipaddr, u16_t* port) +{ + if ((sockaddr->sa_family) == AF_INET6) { + SOCKADDR6_TO_IP6ADDR_PORT((const struct sockaddr_in6*)(const void*)(sockaddr), ipaddr, *port); + ipaddr->type = IPADDR_TYPE_V6; + } else { + SOCKADDR4_TO_IP4ADDR_PORT((const struct sockaddr_in*)(const void*)(sockaddr), ipaddr, *port); + ipaddr->type = IPADDR_TYPE_V4; + } +} +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + +/** LWIP_NETCONN_SEM_PER_THREAD==1: initialize thread-local semaphore */ +void +lwip_socket_thread_init(void) +{ + netconn_thread_init(); +} + +/** LWIP_NETCONN_SEM_PER_THREAD==1: destroy thread-local semaphore */ +void +lwip_socket_thread_cleanup(void) +{ + netconn_thread_cleanup(); +} + +/** + * Map a externally used socket index to the internal socket representation. + * + * @param s externally used socket index + * @return struct lwip_sock for the socket or NULL if not found + */ +static struct lwip_sock * +get_socket(int s) +{ + struct lwip_sock *sock; + + s -= LWIP_SOCKET_OFFSET; + + if ((s < 0) || (s >= NUM_SOCKETS)) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("get_socket(%d): invalid\n", s + LWIP_SOCKET_OFFSET)); + set_errno(EBADF); + return NULL; + } + + sock = &sockets[s]; + + if (!sock->conn) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("get_socket(%d): not active\n", s + LWIP_SOCKET_OFFSET)); + set_errno(EBADF); + return NULL; + } + + return sock; +} + +/** + * Same as get_socket but doesn't set errno + * + * @param s externally used socket index + * @return struct lwip_sock for the socket or NULL if not found + */ +static struct lwip_sock * +tryget_socket(int s) +{ + s -= LWIP_SOCKET_OFFSET; + if ((s < 0) || (s >= NUM_SOCKETS)) { + return NULL; + } + if (!sockets[s].conn) { + return NULL; + } + return &sockets[s]; +} + +/** + * Allocate a new socket for a given netconn. + * + * @param newconn the netconn for which to allocate a socket + * @param accepted 1 if socket has been created by accept(), + * 0 if socket has been created by socket() + * @return the index of the new socket; -1 on error + */ +static int +alloc_socket(struct netconn *newconn, int accepted) +{ + int i; + SYS_ARCH_DECL_PROTECT(lev); + + /* allocate a new socket identifier */ + for (i = 0; i < NUM_SOCKETS; ++i) { + /* Protect socket array */ + SYS_ARCH_PROTECT(lev); + if (!sockets[i].conn && (sockets[i].select_waiting == 0)) { + sockets[i].conn = newconn; + /* The socket is not yet known to anyone, so no need to protect + after having marked it as used. */ + SYS_ARCH_UNPROTECT(lev); + sockets[i].lastdata = NULL; + sockets[i].lastoffset = 0; + sockets[i].rcvevent = 0; + /* TCP sendbuf is empty, but the socket is not yet writable until connected + * (unless it has been created by accept()). */ + sockets[i].sendevent = (NETCONNTYPE_GROUP(newconn->type) == NETCONN_TCP ? (accepted != 0) : 1); + sockets[i].errevent = 0; + sockets[i].err = 0; + return i + LWIP_SOCKET_OFFSET; + } + SYS_ARCH_UNPROTECT(lev); + } + return -1; +} + +/** Free a socket. The socket's netconn must have been + * delete before! + * + * @param sock the socket to free + * @param is_tcp != 0 for TCP sockets, used to free lastdata + */ +static void +free_socket(struct lwip_sock *sock, int is_tcp) +{ + void *lastdata; + + lastdata = sock->lastdata; + sock->lastdata = NULL; + sock->lastoffset = 0; + sock->err = 0; + + /* Protect socket array */ + SYS_ARCH_SET(sock->conn, NULL); + /* don't use 'sock' after this line, as another task might have allocated it */ + + if (lastdata != NULL) { + if (is_tcp) { + pbuf_free((struct pbuf *)lastdata); + } else { + netbuf_delete((struct netbuf *)lastdata); + } + } +} + +/* Below this, the well-known socket functions are implemented. + * Use google.com or opengroup.org to get a good description :-) + * + * Exceptions are documented! + */ + +int +lwip_accept(int s, struct sockaddr *addr, socklen_t *addrlen) +{ + struct lwip_sock *sock, *nsock; + struct netconn *newconn; + ip_addr_t naddr; + u16_t port = 0; + int newsock; + err_t err; + SYS_ARCH_DECL_PROTECT(lev); + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d)...\n", s)); + sock = get_socket(s); + if (!sock) { + return -1; + } + + if (netconn_is_nonblocking(sock->conn) && (sock->rcvevent <= 0)) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d): returning EWOULDBLOCK\n", s)); + set_errno(EWOULDBLOCK); + return -1; + } + + /* wait for a new connection */ + err = netconn_accept(sock->conn, &newconn); + if (err != ERR_OK) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d): netconn_acept failed, err=%d\n", s, err)); + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) { + sock_set_errno(sock, EOPNOTSUPP); + } else if (err == ERR_CLSD) { + sock_set_errno(sock, EINVAL); + } else { + sock_set_errno(sock, err_to_errno(err)); + } + return -1; + } + LWIP_ASSERT("newconn != NULL", newconn != NULL); + + newsock = alloc_socket(newconn, 1); + if (newsock == -1) { + netconn_delete(newconn); + sock_set_errno(sock, ENFILE); + return -1; + } + LWIP_ASSERT("invalid socket index", (newsock >= LWIP_SOCKET_OFFSET) && (newsock < NUM_SOCKETS + LWIP_SOCKET_OFFSET)); + LWIP_ASSERT("newconn->callback == event_callback", newconn->callback == event_callback); + nsock = &sockets[newsock - LWIP_SOCKET_OFFSET]; + + /* See event_callback: If data comes in right away after an accept, even + * though the server task might not have created a new socket yet. + * In that case, newconn->socket is counted down (newconn->socket--), + * so nsock->rcvevent is >= 1 here! + */ + SYS_ARCH_PROTECT(lev); + nsock->rcvevent += (s16_t)(-1 - newconn->socket); + newconn->socket = newsock; + SYS_ARCH_UNPROTECT(lev); + + /* Note that POSIX only requires us to check addr is non-NULL. addrlen must + * not be NULL if addr is valid. + */ + if (addr != NULL) { + union sockaddr_aligned tempaddr; + /* get the IP address and port of the remote host */ + err = netconn_peer(newconn, &naddr, &port); + if (err != ERR_OK) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d): netconn_peer failed, err=%d\n", s, err)); + netconn_delete(newconn); + free_socket(nsock, 1); + sock_set_errno(sock, err_to_errno(err)); + return -1; + } + LWIP_ASSERT("addr valid but addrlen NULL", addrlen != NULL); + + IPADDR_PORT_TO_SOCKADDR(&tempaddr, &naddr, port); + if (*addrlen > tempaddr.sa.sa_len) { + *addrlen = tempaddr.sa.sa_len; + } + MEMCPY(addr, &tempaddr, *addrlen); + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d) returning new sock=%d addr=", s, newsock)); + ip_addr_debug_print_val(SOCKETS_DEBUG, naddr); + LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F"\n", port)); + } else { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_accept(%d) returning new sock=%d", s, newsock)); + } + + sock_set_errno(sock, 0); + return newsock; +} + +int +lwip_bind(int s, const struct sockaddr *name, socklen_t namelen) +{ + struct lwip_sock *sock; + ip_addr_t local_addr; + u16_t local_port; + err_t err; + + sock = get_socket(s); + if (!sock) { + return -1; + } + + if (!SOCK_ADDR_TYPE_MATCH(name, sock)) { + /* sockaddr does not match socket type (IPv4/IPv6) */ + sock_set_errno(sock, err_to_errno(ERR_VAL)); + return -1; + } + + /* check size, family and alignment of 'name' */ + LWIP_ERROR("lwip_bind: invalid address", (IS_SOCK_ADDR_LEN_VALID(namelen) && + IS_SOCK_ADDR_TYPE_VALID(name) && IS_SOCK_ADDR_ALIGNED(name)), + sock_set_errno(sock, err_to_errno(ERR_ARG)); return -1;); + LWIP_UNUSED_ARG(namelen); + + SOCKADDR_TO_IPADDR_PORT(name, &local_addr, local_port); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_bind(%d, addr=", s)); + ip_addr_debug_print_val(SOCKETS_DEBUG, local_addr); + LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F")\n", local_port)); + +#if LWIP_IPV4 && LWIP_IPV6 + /* Dual-stack: Unmap IPv4 mapped IPv6 addresses */ + if (IP_IS_V6_VAL(local_addr) && ip6_addr_isipv4mappedipv6(ip_2_ip6(&local_addr))) { + unmap_ipv4_mapped_ipv6(ip_2_ip4(&local_addr), ip_2_ip6(&local_addr)); + IP_SET_TYPE_VAL(local_addr, IPADDR_TYPE_V4); + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + + err = netconn_bind(sock->conn, &local_addr, local_port); + + if (err != ERR_OK) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_bind(%d) failed, err=%d\n", s, err)); + sock_set_errno(sock, err_to_errno(err)); + return -1; + } + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_bind(%d) succeeded\n", s)); + sock_set_errno(sock, 0); + return 0; +} + +int +lwip_close(int s) +{ + struct lwip_sock *sock; + int is_tcp = 0; + err_t err; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_close(%d)\n", s)); + + sock = get_socket(s); + if (!sock) { + return -1; + } + + if (sock->conn != NULL) { + is_tcp = NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP; + } else { + LWIP_ASSERT("sock->lastdata == NULL", sock->lastdata == NULL); + } + +#if LWIP_IGMP + /* drop all possibly joined IGMP memberships */ + lwip_socket_drop_registered_memberships(s); +#endif /* LWIP_IGMP */ + + err = netconn_delete(sock->conn); + if (err != ERR_OK) { + sock_set_errno(sock, err_to_errno(err)); + return -1; + } + + free_socket(sock, is_tcp); + set_errno(0); + return 0; +} + +int +lwip_connect(int s, const struct sockaddr *name, socklen_t namelen) +{ + struct lwip_sock *sock; + err_t err; + + sock = get_socket(s); + if (!sock) { + return -1; + } + + if (!SOCK_ADDR_TYPE_MATCH_OR_UNSPEC(name, sock)) { + /* sockaddr does not match socket type (IPv4/IPv6) */ + sock_set_errno(sock, err_to_errno(ERR_VAL)); + return -1; + } + + LWIP_UNUSED_ARG(namelen); + if (name->sa_family == AF_UNSPEC) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d, AF_UNSPEC)\n", s)); + err = netconn_disconnect(sock->conn); + } else { + ip_addr_t remote_addr; + u16_t remote_port; + + /* check size, family and alignment of 'name' */ + LWIP_ERROR("lwip_connect: invalid address", IS_SOCK_ADDR_LEN_VALID(namelen) && + IS_SOCK_ADDR_TYPE_VALID_OR_UNSPEC(name) && IS_SOCK_ADDR_ALIGNED(name), + sock_set_errno(sock, err_to_errno(ERR_ARG)); return -1;); + + SOCKADDR_TO_IPADDR_PORT(name, &remote_addr, remote_port); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d, addr=", s)); + ip_addr_debug_print_val(SOCKETS_DEBUG, remote_addr); + LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F")\n", remote_port)); + +#if LWIP_IPV4 && LWIP_IPV6 + /* Dual-stack: Unmap IPv4 mapped IPv6 addresses */ + if (IP_IS_V6_VAL(remote_addr) && ip6_addr_isipv4mappedipv6(ip_2_ip6(&remote_addr))) { + unmap_ipv4_mapped_ipv6(ip_2_ip4(&remote_addr), ip_2_ip6(&remote_addr)); + IP_SET_TYPE_VAL(remote_addr, IPADDR_TYPE_V4); + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + + err = netconn_connect(sock->conn, &remote_addr, remote_port); + } + + if (err != ERR_OK) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d) failed, err=%d\n", s, err)); + sock_set_errno(sock, err_to_errno(err)); + return -1; + } + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_connect(%d) succeeded\n", s)); + sock_set_errno(sock, 0); + return 0; +} + +/** + * Set a socket into listen mode. + * The socket may not have been used for another connection previously. + * + * @param s the socket to set to listening mode + * @param backlog (ATTENTION: needs TCP_LISTEN_BACKLOG=1) + * @return 0 on success, non-zero on failure + */ +int +lwip_listen(int s, int backlog) +{ + struct lwip_sock *sock; + err_t err; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_listen(%d, backlog=%d)\n", s, backlog)); + + sock = get_socket(s); + if (!sock) { + return -1; + } + + /* limit the "backlog" parameter to fit in an u8_t */ + backlog = LWIP_MIN(LWIP_MAX(backlog, 0), 0xff); + + err = netconn_listen_with_backlog(sock->conn, (u8_t)backlog); + + if (err != ERR_OK) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_listen(%d) failed, err=%d\n", s, err)); + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) { + sock_set_errno(sock, EOPNOTSUPP); + return -1; + } + sock_set_errno(sock, err_to_errno(err)); + return -1; + } + + sock_set_errno(sock, 0); + return 0; +} + +int +lwip_recvfrom(int s, void *mem, size_t len, int flags, + struct sockaddr *from, socklen_t *fromlen) +{ + struct lwip_sock *sock; + void *buf = NULL; + struct pbuf *p; + u16_t buflen, copylen; + int off = 0; + u8_t done = 0; + err_t err; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d, %p, %"SZT_F", 0x%x, ..)\n", s, mem, len, flags)); + sock = get_socket(s); + if (!sock) { + return -1; + } + + do { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: top while sock->lastdata=%p\n", sock->lastdata)); + /* Check if there is data left from the last recv operation. */ + if (sock->lastdata) { + buf = sock->lastdata; + } else { + /* If this is non-blocking call, then check first */ + if (((flags & MSG_DONTWAIT) || netconn_is_nonblocking(sock->conn)) && + (sock->rcvevent <= 0)) { + if (off > 0) { + /* already received data, return that */ + sock_set_errno(sock, 0); + return off; + } + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): returning EWOULDBLOCK\n", s)); + set_errno(EWOULDBLOCK); + return -1; + } + + /* No data was left from the previous operation, so we try to get + some from the network. */ + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) { + err = netconn_recv_tcp_pbuf(sock->conn, (struct pbuf **)&buf); + } else { + err = netconn_recv(sock->conn, (struct netbuf **)&buf); + } + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: netconn_recv err=%d, netbuf=%p\n", + err, buf)); + + if (err != ERR_OK) { + if (off > 0) { + if (err == ERR_CLSD) { + /* closed but already received data, ensure select gets the FIN, too */ + event_callback(sock->conn, NETCONN_EVT_RCVPLUS, 0); + } + /* already received data, return that */ + sock_set_errno(sock, 0); + return off; + } + /* We should really do some error checking here. */ + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): buf == NULL, error is \"%s\"!\n", + s, lwip_strerr(err))); + sock_set_errno(sock, err_to_errno(err)); + if (err == ERR_CLSD) { + return 0; + } else { + return -1; + } + } + LWIP_ASSERT("buf != NULL", buf != NULL); + sock->lastdata = buf; + } + + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) { + p = (struct pbuf *)buf; + } else { + p = ((struct netbuf *)buf)->p; + } + buflen = p->tot_len; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: buflen=%"U16_F" len=%"SZT_F" off=%d sock->lastoffset=%"U16_F"\n", + buflen, len, off, sock->lastoffset)); + + buflen -= sock->lastoffset; + + if (len > buflen) { + copylen = buflen; + } else { + copylen = (u16_t)len; + } + + /* copy the contents of the received buffer into + the supplied memory pointer mem */ + pbuf_copy_partial(p, (u8_t*)mem + off, copylen, sock->lastoffset); + + off += copylen; + + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) { + LWIP_ASSERT("invalid copylen, len would underflow", len >= copylen); + len -= copylen; + if ((len <= 0) || + (p->flags & PBUF_FLAG_PUSH) || + (sock->rcvevent <= 0) || + ((flags & MSG_PEEK) != 0)) { + done = 1; + } + } else { + done = 1; + } + + /* Check to see from where the data was.*/ + if (done) { +#if !SOCKETS_DEBUG + if (from && fromlen) +#endif /* !SOCKETS_DEBUG */ + { + u16_t port; + ip_addr_t tmpaddr; + ip_addr_t *fromaddr; + union sockaddr_aligned saddr; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom(%d): addr=", s)); + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) { + fromaddr = &tmpaddr; + netconn_getaddr(sock->conn, fromaddr, &port, 0); + } else { + port = netbuf_fromport((struct netbuf *)buf); + fromaddr = netbuf_fromaddr((struct netbuf *)buf); + } + +#if LWIP_IPV4 && LWIP_IPV6 + /* Dual-stack: Map IPv4 addresses to IPv4 mapped IPv6 */ + if (NETCONNTYPE_ISIPV6(netconn_type(sock->conn)) && IP_IS_V4(fromaddr)) { + ip4_2_ipv4_mapped_ipv6(ip_2_ip6(fromaddr), ip_2_ip4(fromaddr)); + IP_SET_TYPE(fromaddr, IPADDR_TYPE_V6); + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + + IPADDR_PORT_TO_SOCKADDR(&saddr, fromaddr, port); + ip_addr_debug_print(SOCKETS_DEBUG, fromaddr); + LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F" len=%d\n", port, off)); +#if SOCKETS_DEBUG + if (from && fromlen) +#endif /* SOCKETS_DEBUG */ + { + if (*fromlen > saddr.sa.sa_len) { + *fromlen = saddr.sa.sa_len; + } + MEMCPY(from, &saddr, *fromlen); + } + } + } + + /* If we don't peek the incoming message... */ + if ((flags & MSG_PEEK) == 0) { + /* If this is a TCP socket, check if there is data left in the + buffer. If so, it should be saved in the sock structure for next + time around. */ + if ((NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) && (buflen - copylen > 0)) { + sock->lastdata = buf; + sock->lastoffset += copylen; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: lastdata now netbuf=%p\n", buf)); + } else { + sock->lastdata = NULL; + sock->lastoffset = 0; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_recvfrom: deleting netbuf=%p\n", buf)); + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) { + pbuf_free((struct pbuf *)buf); + } else { + netbuf_delete((struct netbuf *)buf); + } + buf = NULL; + } + } + } while (!done); + + sock_set_errno(sock, 0); + return off; +} + +int +lwip_read(int s, void *mem, size_t len) +{ + return lwip_recvfrom(s, mem, len, 0, NULL, NULL); +} + +int +lwip_recv(int s, void *mem, size_t len, int flags) +{ + return lwip_recvfrom(s, mem, len, flags, NULL, NULL); +} + +int +lwip_send(int s, const void *data, size_t size, int flags) +{ + struct lwip_sock *sock; + err_t err; + u8_t write_flags; + size_t written; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_send(%d, data=%p, size=%"SZT_F", flags=0x%x)\n", + s, data, size, flags)); + + sock = get_socket(s); + if (!sock) { + return -1; + } + + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) { +#if (LWIP_UDP || LWIP_RAW) + return lwip_sendto(s, data, size, flags, NULL, 0); +#else /* (LWIP_UDP || LWIP_RAW) */ + sock_set_errno(sock, err_to_errno(ERR_ARG)); + return -1; +#endif /* (LWIP_UDP || LWIP_RAW) */ + } + + write_flags = NETCONN_COPY | + ((flags & MSG_MORE) ? NETCONN_MORE : 0) | + ((flags & MSG_DONTWAIT) ? NETCONN_DONTBLOCK : 0); + written = 0; + err = netconn_write_partly(sock->conn, data, size, write_flags, &written); + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_send(%d) err=%d written=%"SZT_F"\n", s, err, written)); + sock_set_errno(sock, err_to_errno(err)); + return (err == ERR_OK ? (int)written : -1); +} + +int +lwip_sendmsg(int s, const struct msghdr *msg, int flags) +{ + struct lwip_sock *sock; + int i; +#if LWIP_TCP + u8_t write_flags; + size_t written; +#endif + int size = 0; + err_t err = ERR_OK; + + sock = get_socket(s); + if (!sock) { + return -1; + } + + LWIP_ERROR("lwip_sendmsg: invalid msghdr", msg != NULL, + sock_set_errno(sock, err_to_errno(ERR_ARG)); return -1;); + + LWIP_UNUSED_ARG(msg->msg_control); + LWIP_UNUSED_ARG(msg->msg_controllen); + LWIP_UNUSED_ARG(msg->msg_flags); + LWIP_ERROR("lwip_sendmsg: invalid msghdr iov", (msg->msg_iov != NULL && msg->msg_iovlen != 0), + sock_set_errno(sock, err_to_errno(ERR_ARG)); return -1;); + + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) { +#if LWIP_TCP + write_flags = NETCONN_COPY | + ((flags & MSG_MORE) ? NETCONN_MORE : 0) | + ((flags & MSG_DONTWAIT) ? NETCONN_DONTBLOCK : 0); + + for (i = 0; i < msg->msg_iovlen; i++) { + u8_t apiflags = write_flags; + if (i + 1 < msg->msg_iovlen) { + apiflags |= NETCONN_MORE; + } + written = 0; + err = netconn_write_partly(sock->conn, msg->msg_iov[i].iov_base, msg->msg_iov[i].iov_len, write_flags, &written); + if (err == ERR_OK) { + size += written; + /* check that the entire IO vector was accepected, if not return a partial write */ + if (written != msg->msg_iov[i].iov_len) + break; + } + /* none of this IO vector was accepted, but previous was, return partial write and conceal ERR_WOULDBLOCK */ + else if (err == ERR_WOULDBLOCK && size > 0) { + err = ERR_OK; + /* let ERR_WOULDBLOCK persist on the netconn since we are returning ERR_OK */ + break; + } else { + size = -1; + break; + } + } + sock_set_errno(sock, err_to_errno(err)); + return size; +#else /* LWIP_TCP */ + sock_set_errno(sock, err_to_errno(ERR_ARG)); + return -1; +#endif /* LWIP_TCP */ + } + /* else, UDP and RAW NETCONNs */ +#if LWIP_UDP || LWIP_RAW + { + struct netbuf *chain_buf; + + LWIP_UNUSED_ARG(flags); + LWIP_ERROR("lwip_sendmsg: invalid msghdr name", (((msg->msg_name == NULL) && (msg->msg_namelen == 0)) || + IS_SOCK_ADDR_LEN_VALID(msg->msg_namelen)) , + sock_set_errno(sock, err_to_errno(ERR_ARG)); return -1;); + + /* initialize chain buffer with destination */ + chain_buf = netbuf_new(); + if (!chain_buf) { + sock_set_errno(sock, err_to_errno(ERR_MEM)); + return -1; + } + if (msg->msg_name) { + u16_t remote_port; + SOCKADDR_TO_IPADDR_PORT((const struct sockaddr *)msg->msg_name, &chain_buf->addr, remote_port); + netbuf_fromport(chain_buf) = remote_port; + } +#if LWIP_NETIF_TX_SINGLE_PBUF + for (i = 0; i < msg->msg_iovlen; i++) { + size += msg->msg_iov[i].iov_len; + } + /* Allocate a new netbuf and copy the data into it. */ + if (netbuf_alloc(chain_buf, (u16_t)size) == NULL) { + err = ERR_MEM; + } else { + /* flatten the IO vectors */ + size_t offset = 0; + for (i = 0; i < msg->msg_iovlen; i++) { + MEMCPY(&((u8_t*)chain_buf->p->payload)[offset], msg->msg_iov[i].iov_base, msg->msg_iov[i].iov_len); + offset += msg->msg_iov[i].iov_len; + } +#if LWIP_CHECKSUM_ON_COPY + { + /* This can be improved by using LWIP_CHKSUM_COPY() and aggregating the checksum for each IO vector */ + u16_t chksum = ~inet_chksum_pbuf(chain_buf->p); + netbuf_set_chksum(chain_buf, chksum); + } +#endif /* LWIP_CHECKSUM_ON_COPY */ + err = ERR_OK; + } +#else /* LWIP_NETIF_TX_SINGLE_PBUF */ + /* create a chained netbuf from the IO vectors. NOTE: we assemble a pbuf chain + manually to avoid having to allocate, chain, and delete a netbuf for each iov */ + for (i = 0; i < msg->msg_iovlen; i++) { + struct pbuf *p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_REF); + if (p == NULL) { + err = ERR_MEM; /* let netbuf_delete() cleanup chain_buf */ + break; + } + p->payload = msg->msg_iov[i].iov_base; + LWIP_ASSERT("iov_len < u16_t", msg->msg_iov[i].iov_len <= 0xFFFF); + p->len = p->tot_len = (u16_t)msg->msg_iov[i].iov_len; + /* netbuf empty, add new pbuf */ + if (chain_buf->p == NULL) { + chain_buf->p = chain_buf->ptr = p; + /* add pbuf to existing pbuf chain */ + } else { + pbuf_cat(chain_buf->p, p); + } + } + /* save size of total chain */ + if (err == ERR_OK) { + size = netbuf_len(chain_buf); + } +#endif /* LWIP_NETIF_TX_SINGLE_PBUF */ + + if (err == ERR_OK) { +#if LWIP_IPV4 && LWIP_IPV6 + /* Dual-stack: Unmap IPv4 mapped IPv6 addresses */ + if (IP_IS_V6_VAL(chain_buf->addr) && ip6_addr_isipv4mappedipv6(ip_2_ip6(&chain_buf->addr))) { + unmap_ipv4_mapped_ipv6(ip_2_ip4(&chain_buf->addr), ip_2_ip6(&chain_buf->addr)); + IP_SET_TYPE_VAL(chain_buf->addr, IPADDR_TYPE_V4); + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + + /* send the data */ + err = netconn_send(sock->conn, chain_buf); + } + + /* deallocated the buffer */ + netbuf_delete(chain_buf); + + sock_set_errno(sock, err_to_errno(err)); + return (err == ERR_OK ? size : -1); + } +#else /* LWIP_UDP || LWIP_RAW */ + sock_set_errno(sock, err_to_errno(ERR_ARG)); + return -1; +#endif /* LWIP_UDP || LWIP_RAW */ +} + +int +lwip_sendto(int s, const void *data, size_t size, int flags, + const struct sockaddr *to, socklen_t tolen) +{ + struct lwip_sock *sock; + err_t err; + u16_t short_size; + u16_t remote_port; + struct netbuf buf; + + sock = get_socket(s); + if (!sock) { + return -1; + } + + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) == NETCONN_TCP) { +#if LWIP_TCP + return lwip_send(s, data, size, flags); +#else /* LWIP_TCP */ + LWIP_UNUSED_ARG(flags); + sock_set_errno(sock, err_to_errno(ERR_ARG)); + return -1; +#endif /* LWIP_TCP */ + } + + /* @todo: split into multiple sendto's? */ + LWIP_ASSERT("lwip_sendto: size must fit in u16_t", size <= 0xffff); + short_size = (u16_t)size; + LWIP_ERROR("lwip_sendto: invalid address", (((to == NULL) && (tolen == 0)) || + (IS_SOCK_ADDR_LEN_VALID(tolen) && + IS_SOCK_ADDR_TYPE_VALID(to) && IS_SOCK_ADDR_ALIGNED(to))), + sock_set_errno(sock, err_to_errno(ERR_ARG)); return -1;); + LWIP_UNUSED_ARG(tolen); + + /* initialize a buffer */ + buf.p = buf.ptr = NULL; +#if LWIP_CHECKSUM_ON_COPY + buf.flags = 0; +#endif /* LWIP_CHECKSUM_ON_COPY */ + if (to) { + SOCKADDR_TO_IPADDR_PORT(to, &buf.addr, remote_port); + } else { + remote_port = 0; + ip_addr_set_any(NETCONNTYPE_ISIPV6(netconn_type(sock->conn)), &buf.addr); + } + netbuf_fromport(&buf) = remote_port; + + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_sendto(%d, data=%p, short_size=%"U16_F", flags=0x%x to=", + s, data, short_size, flags)); + ip_addr_debug_print(SOCKETS_DEBUG, &buf.addr); + LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F"\n", remote_port)); + + /* make the buffer point to the data that should be sent */ +#if LWIP_NETIF_TX_SINGLE_PBUF + /* Allocate a new netbuf and copy the data into it. */ + if (netbuf_alloc(&buf, short_size) == NULL) { + err = ERR_MEM; + } else { +#if LWIP_CHECKSUM_ON_COPY + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_RAW) { + u16_t chksum = LWIP_CHKSUM_COPY(buf.p->payload, data, short_size); + netbuf_set_chksum(&buf, chksum); + } else +#endif /* LWIP_CHECKSUM_ON_COPY */ + { + MEMCPY(buf.p->payload, data, short_size); + } + err = ERR_OK; + } +#else /* LWIP_NETIF_TX_SINGLE_PBUF */ + err = netbuf_ref(&buf, data, short_size); +#endif /* LWIP_NETIF_TX_SINGLE_PBUF */ + if (err == ERR_OK) { +#if LWIP_IPV4 && LWIP_IPV6 + /* Dual-stack: Unmap IPv4 mapped IPv6 addresses */ + if (IP_IS_V6_VAL(buf.addr) && ip6_addr_isipv4mappedipv6(ip_2_ip6(&buf.addr))) { + unmap_ipv4_mapped_ipv6(ip_2_ip4(&buf.addr), ip_2_ip6(&buf.addr)); + IP_SET_TYPE_VAL(buf.addr, IPADDR_TYPE_V4); + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + + /* send the data */ + err = netconn_send(sock->conn, &buf); + } + + /* deallocated the buffer */ + netbuf_free(&buf); + + sock_set_errno(sock, err_to_errno(err)); + return (err == ERR_OK ? short_size : -1); +} + +int +lwip_socket(int domain, int type, int protocol) +{ + struct netconn *conn; + int i; + + LWIP_UNUSED_ARG(domain); /* @todo: check this */ + + /* create a netconn */ + switch (type) { + case SOCK_RAW: + conn = netconn_new_with_proto_and_callback(DOMAIN_TO_NETCONN_TYPE(domain, NETCONN_RAW), + (u8_t)protocol, event_callback); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_RAW, %d) = ", + domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol)); + break; + case SOCK_DGRAM: + conn = netconn_new_with_callback(DOMAIN_TO_NETCONN_TYPE(domain, + ((protocol == IPPROTO_UDPLITE) ? NETCONN_UDPLITE : NETCONN_UDP)) , + event_callback); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_DGRAM, %d) = ", + domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol)); + break; + case SOCK_STREAM: + conn = netconn_new_with_callback(DOMAIN_TO_NETCONN_TYPE(domain, NETCONN_TCP), event_callback); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%s, SOCK_STREAM, %d) = ", + domain == PF_INET ? "PF_INET" : "UNKNOWN", protocol)); + break; + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_socket(%d, %d/UNKNOWN, %d) = -1\n", + domain, type, protocol)); + set_errno(EINVAL); + return -1; + } + + if (!conn) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("-1 / ENOBUFS (could not create netconn)\n")); + set_errno(ENOBUFS); + return -1; + } + + i = alloc_socket(conn, 0); + + if (i == -1) { + netconn_delete(conn); + set_errno(ENFILE); + return -1; + } + conn->socket = i; + LWIP_DEBUGF(SOCKETS_DEBUG, ("%d\n", i)); + set_errno(0); + return i; +} + +int +lwip_write(int s, const void *data, size_t size) +{ + return lwip_send(s, data, size, 0); +} + +int +lwip_writev(int s, const struct iovec *iov, int iovcnt) +{ + struct msghdr msg; + + msg.msg_name = NULL; + msg.msg_namelen = 0; + /* Hack: we have to cast via number to cast from 'const' pointer to non-const. + Blame the opengroup standard for this inconsistency. */ + msg.msg_iov = LWIP_CONST_CAST(struct iovec *, iov); + msg.msg_iovlen = iovcnt; + msg.msg_control = NULL; + msg.msg_controllen = 0; + msg.msg_flags = 0; + return lwip_sendmsg(s, &msg, 0); +} + +/** + * Go through the readset and writeset lists and see which socket of the sockets + * set in the sets has events. On return, readset, writeset and exceptset have + * the sockets enabled that had events. + * + * @param maxfdp1 the highest socket index in the sets + * @param readset_in set of sockets to check for read events + * @param writeset_in set of sockets to check for write events + * @param exceptset_in set of sockets to check for error events + * @param readset_out set of sockets that had read events + * @param writeset_out set of sockets that had write events + * @param exceptset_out set os sockets that had error events + * @return number of sockets that had events (read/write/exception) (>= 0) + */ +static int +lwip_selscan(int maxfdp1, fd_set *readset_in, fd_set *writeset_in, fd_set *exceptset_in, + fd_set *readset_out, fd_set *writeset_out, fd_set *exceptset_out) +{ + int i, nready = 0; + fd_set lreadset, lwriteset, lexceptset; + struct lwip_sock *sock; + SYS_ARCH_DECL_PROTECT(lev); + + FD_ZERO(&lreadset); + FD_ZERO(&lwriteset); + FD_ZERO(&lexceptset); + + /* Go through each socket in each list to count number of sockets which + currently match */ + for (i = LWIP_SOCKET_OFFSET; i < maxfdp1; i++) { + /* if this FD is not in the set, continue */ + if (!(readset_in && FD_ISSET(i, readset_in)) && + !(writeset_in && FD_ISSET(i, writeset_in)) && + !(exceptset_in && FD_ISSET(i, exceptset_in))) { + continue; + } + /* First get the socket's status (protected)... */ + SYS_ARCH_PROTECT(lev); + sock = tryget_socket(i); + if (sock != NULL) { + void* lastdata = sock->lastdata; + s16_t rcvevent = sock->rcvevent; + u16_t sendevent = sock->sendevent; + u16_t errevent = sock->errevent; + SYS_ARCH_UNPROTECT(lev); + + /* ... then examine it: */ + /* See if netconn of this socket is ready for read */ + if (readset_in && FD_ISSET(i, readset_in) && ((lastdata != NULL) || (rcvevent > 0))) { + FD_SET(i, &lreadset); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_selscan: fd=%d ready for reading\n", i)); + nready++; + } + /* See if netconn of this socket is ready for write */ + if (writeset_in && FD_ISSET(i, writeset_in) && (sendevent != 0)) { + FD_SET(i, &lwriteset); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_selscan: fd=%d ready for writing\n", i)); + nready++; + } + /* See if netconn of this socket had an error */ + if (exceptset_in && FD_ISSET(i, exceptset_in) && (errevent != 0)) { + FD_SET(i, &lexceptset); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_selscan: fd=%d ready for exception\n", i)); + nready++; + } + } else { + SYS_ARCH_UNPROTECT(lev); + /* continue on to next FD in list */ + } + } + /* copy local sets to the ones provided as arguments */ + *readset_out = lreadset; + *writeset_out = lwriteset; + *exceptset_out = lexceptset; + + LWIP_ASSERT("nready >= 0", nready >= 0); + return nready; +} + +int +lwip_select(int maxfdp1, fd_set *readset, fd_set *writeset, fd_set *exceptset, + struct timeval *timeout) +{ + u32_t waitres = 0; + int nready; + fd_set lreadset, lwriteset, lexceptset; + u32_t msectimeout; + struct lwip_select_cb select_cb; + int i; + int maxfdp2; +#if LWIP_NETCONN_SEM_PER_THREAD + int waited = 0; +#endif + SYS_ARCH_DECL_PROTECT(lev); + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select(%d, %p, %p, %p, tvsec=%"S32_F" tvusec=%"S32_F")\n", + maxfdp1, (void *)readset, (void *) writeset, (void *) exceptset, + timeout ? (s32_t)timeout->tv_sec : (s32_t)-1, + timeout ? (s32_t)timeout->tv_usec : (s32_t)-1)); + + /* Go through each socket in each list to count number of sockets which + currently match */ + nready = lwip_selscan(maxfdp1, readset, writeset, exceptset, &lreadset, &lwriteset, &lexceptset); + + /* If we don't have any current events, then suspend if we are supposed to */ + if (!nready) { + if (timeout && timeout->tv_sec == 0 && timeout->tv_usec == 0) { + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: no timeout, returning 0\n")); + /* This is OK as the local fdsets are empty and nready is zero, + or we would have returned earlier. */ + goto return_copy_fdsets; + } + + /* None ready: add our semaphore to list: + We don't actually need any dynamic memory. Our entry on the + list is only valid while we are in this function, so it's ok + to use local variables. */ + + select_cb.next = NULL; + select_cb.prev = NULL; + select_cb.readset = readset; + select_cb.writeset = writeset; + select_cb.exceptset = exceptset; + select_cb.sem_signalled = 0; +#if LWIP_NETCONN_SEM_PER_THREAD + select_cb.sem = LWIP_NETCONN_THREAD_SEM_GET(); +#else /* LWIP_NETCONN_SEM_PER_THREAD */ + if (sys_sem_new(&select_cb.sem, 0) != ERR_OK) { + /* failed to create semaphore */ + set_errno(ENOMEM); + return -1; + } +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + + /* Protect the select_cb_list */ + SYS_ARCH_PROTECT(lev); + + /* Put this select_cb on top of list */ + select_cb.next = select_cb_list; + if (select_cb_list != NULL) { + select_cb_list->prev = &select_cb; + } + select_cb_list = &select_cb; + /* Increasing this counter tells event_callback that the list has changed. */ + select_cb_ctr++; + + /* Now we can safely unprotect */ + SYS_ARCH_UNPROTECT(lev); + + /* Increase select_waiting for each socket we are interested in */ + maxfdp2 = maxfdp1; + for (i = LWIP_SOCKET_OFFSET; i < maxfdp1; i++) { + if ((readset && FD_ISSET(i, readset)) || + (writeset && FD_ISSET(i, writeset)) || + (exceptset && FD_ISSET(i, exceptset))) { + struct lwip_sock *sock; + SYS_ARCH_PROTECT(lev); + sock = tryget_socket(i); + if (sock != NULL) { + sock->select_waiting++; + LWIP_ASSERT("sock->select_waiting > 0", sock->select_waiting > 0); + } else { + /* Not a valid socket */ + nready = -1; + maxfdp2 = i; + SYS_ARCH_UNPROTECT(lev); + break; + } + SYS_ARCH_UNPROTECT(lev); + } + } + + if (nready >= 0) { + /* Call lwip_selscan again: there could have been events between + the last scan (without us on the list) and putting us on the list! */ + nready = lwip_selscan(maxfdp1, readset, writeset, exceptset, &lreadset, &lwriteset, &lexceptset); + if (!nready) { + /* Still none ready, just wait to be woken */ + if (timeout == 0) { + /* Wait forever */ + msectimeout = 0; + } else { + msectimeout = ((timeout->tv_sec * 1000) + ((timeout->tv_usec + 500)/1000)); + if (msectimeout == 0) { + /* Wait 1ms at least (0 means wait forever) */ + msectimeout = 1; + } + } + + waitres = sys_arch_sem_wait(SELECT_SEM_PTR(select_cb.sem), msectimeout); +#if LWIP_NETCONN_SEM_PER_THREAD + waited = 1; +#endif + } + } + + /* Decrease select_waiting for each socket we are interested in */ + for (i = LWIP_SOCKET_OFFSET; i < maxfdp2; i++) { + if ((readset && FD_ISSET(i, readset)) || + (writeset && FD_ISSET(i, writeset)) || + (exceptset && FD_ISSET(i, exceptset))) { + struct lwip_sock *sock; + SYS_ARCH_PROTECT(lev); + sock = tryget_socket(i); + if (sock != NULL) { + /* for now, handle select_waiting==0... */ + LWIP_ASSERT("sock->select_waiting > 0", sock->select_waiting > 0); + if (sock->select_waiting > 0) { + sock->select_waiting--; + } + } else { + /* Not a valid socket */ + nready = -1; + } + SYS_ARCH_UNPROTECT(lev); + } + } + /* Take us off the list */ + SYS_ARCH_PROTECT(lev); + if (select_cb.next != NULL) { + select_cb.next->prev = select_cb.prev; + } + if (select_cb_list == &select_cb) { + LWIP_ASSERT("select_cb.prev == NULL", select_cb.prev == NULL); + select_cb_list = select_cb.next; + } else { + LWIP_ASSERT("select_cb.prev != NULL", select_cb.prev != NULL); + select_cb.prev->next = select_cb.next; + } + /* Increasing this counter tells event_callback that the list has changed. */ + select_cb_ctr++; + SYS_ARCH_UNPROTECT(lev); + +#if LWIP_NETCONN_SEM_PER_THREAD + if (select_cb.sem_signalled && (!waited || (waitres == SYS_ARCH_TIMEOUT))) { + /* don't leave the thread-local semaphore signalled */ + sys_arch_sem_wait(select_cb.sem, 1); + } +#else /* LWIP_NETCONN_SEM_PER_THREAD */ + sys_sem_free(&select_cb.sem); +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + + if (nready < 0) { + /* This happens when a socket got closed while waiting */ + set_errno(EBADF); + return -1; + } + + if (waitres == SYS_ARCH_TIMEOUT) { + /* Timeout */ + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: timeout expired\n")); + /* This is OK as the local fdsets are empty and nready is zero, + or we would have returned earlier. */ + goto return_copy_fdsets; + } + + /* See what's set */ + nready = lwip_selscan(maxfdp1, readset, writeset, exceptset, &lreadset, &lwriteset, &lexceptset); + } + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_select: nready=%d\n", nready)); +return_copy_fdsets: + set_errno(0); + if (readset) { + *readset = lreadset; + } + if (writeset) { + *writeset = lwriteset; + } + if (exceptset) { + *exceptset = lexceptset; + } + return nready; +} + +/** + * Callback registered in the netconn layer for each socket-netconn. + * Processes recvevent (data available) and wakes up tasks waiting for select. + */ +static void +event_callback(struct netconn *conn, enum netconn_evt evt, u16_t len) +{ + int s; + struct lwip_sock *sock; + struct lwip_select_cb *scb; + int last_select_cb_ctr; + SYS_ARCH_DECL_PROTECT(lev); + + LWIP_UNUSED_ARG(len); + + /* Get socket */ + if (conn) { + s = conn->socket; + if (s < 0) { + /* Data comes in right away after an accept, even though + * the server task might not have created a new socket yet. + * Just count down (or up) if that's the case and we + * will use the data later. Note that only receive events + * can happen before the new socket is set up. */ + SYS_ARCH_PROTECT(lev); + if (conn->socket < 0) { + if (evt == NETCONN_EVT_RCVPLUS) { + conn->socket--; + } + SYS_ARCH_UNPROTECT(lev); + return; + } + s = conn->socket; + SYS_ARCH_UNPROTECT(lev); + } + + sock = get_socket(s); + if (!sock) { + return; + } + } else { + return; + } + + SYS_ARCH_PROTECT(lev); + /* Set event as required */ + switch (evt) { + case NETCONN_EVT_RCVPLUS: + sock->rcvevent++; + break; + case NETCONN_EVT_RCVMINUS: + sock->rcvevent--; + break; + case NETCONN_EVT_SENDPLUS: + sock->sendevent = 1; + break; + case NETCONN_EVT_SENDMINUS: + sock->sendevent = 0; + break; + case NETCONN_EVT_ERROR: + sock->errevent = 1; + break; + default: + LWIP_ASSERT("unknown event", 0); + break; + } + + if (sock->select_waiting == 0) { + /* noone is waiting for this socket, no need to check select_cb_list */ + SYS_ARCH_UNPROTECT(lev); + return; + } + + /* Now decide if anyone is waiting for this socket */ + /* NOTE: This code goes through the select_cb_list list multiple times + ONLY IF a select was actually waiting. We go through the list the number + of waiting select calls + 1. This list is expected to be small. */ + + /* At this point, SYS_ARCH is still protected! */ +again: + for (scb = select_cb_list; scb != NULL; scb = scb->next) { + /* remember the state of select_cb_list to detect changes */ + last_select_cb_ctr = select_cb_ctr; + if (scb->sem_signalled == 0) { + /* semaphore not signalled yet */ + int do_signal = 0; + /* Test this select call for our socket */ + if (sock->rcvevent > 0) { + if (scb->readset && FD_ISSET(s, scb->readset)) { + do_signal = 1; + } + } + if (sock->sendevent != 0) { + if (!do_signal && scb->writeset && FD_ISSET(s, scb->writeset)) { + do_signal = 1; + } + } + if (sock->errevent != 0) { + if (!do_signal && scb->exceptset && FD_ISSET(s, scb->exceptset)) { + do_signal = 1; + } + } + if (do_signal) { + scb->sem_signalled = 1; + /* Don't call SYS_ARCH_UNPROTECT() before signaling the semaphore, as this might + lead to the select thread taking itself off the list, invalidating the semaphore. */ + sys_sem_signal(SELECT_SEM_PTR(scb->sem)); + } + } + /* unlock interrupts with each step */ + SYS_ARCH_UNPROTECT(lev); + /* this makes sure interrupt protection time is short */ + SYS_ARCH_PROTECT(lev); + if (last_select_cb_ctr != select_cb_ctr) { + /* someone has changed select_cb_list, restart at the beginning */ + goto again; + } + } + SYS_ARCH_UNPROTECT(lev); +} + +/** + * Close one end of a full-duplex connection. + */ +int +lwip_shutdown(int s, int how) +{ + struct lwip_sock *sock; + err_t err; + u8_t shut_rx = 0, shut_tx = 0; + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_shutdown(%d, how=%d)\n", s, how)); + + sock = get_socket(s); + if (!sock) { + return -1; + } + + if (sock->conn != NULL) { + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) { + sock_set_errno(sock, EOPNOTSUPP); + return -1; + } + } else { + sock_set_errno(sock, ENOTCONN); + return -1; + } + + if (how == SHUT_RD) { + shut_rx = 1; + } else if (how == SHUT_WR) { + shut_tx = 1; + } else if (how == SHUT_RDWR) { + shut_rx = 1; + shut_tx = 1; + } else { + sock_set_errno(sock, EINVAL); + return -1; + } + err = netconn_shutdown(sock->conn, shut_rx, shut_tx); + + sock_set_errno(sock, err_to_errno(err)); + return (err == ERR_OK ? 0 : -1); +} + +static int +lwip_getaddrname(int s, struct sockaddr *name, socklen_t *namelen, u8_t local) +{ + struct lwip_sock *sock; + union sockaddr_aligned saddr; + ip_addr_t naddr; + u16_t port; + err_t err; + + sock = get_socket(s); + if (!sock) { + return -1; + } + + /* get the IP address and port */ + err = netconn_getaddr(sock->conn, &naddr, &port, local); + if (err != ERR_OK) { + sock_set_errno(sock, err_to_errno(err)); + return -1; + } + +#if LWIP_IPV4 && LWIP_IPV6 + /* Dual-stack: Map IPv4 addresses to IPv4 mapped IPv6 */ + if (NETCONNTYPE_ISIPV6(netconn_type(sock->conn)) && + IP_IS_V4_VAL(naddr)) { + ip4_2_ipv4_mapped_ipv6(ip_2_ip6(&naddr), ip_2_ip4(&naddr)); + IP_SET_TYPE_VAL(naddr, IPADDR_TYPE_V6); + } +#endif /* LWIP_IPV4 && LWIP_IPV6 */ + + IPADDR_PORT_TO_SOCKADDR(&saddr, &naddr, port); + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getaddrname(%d, addr=", s)); + ip_addr_debug_print_val(SOCKETS_DEBUG, naddr); + LWIP_DEBUGF(SOCKETS_DEBUG, (" port=%"U16_F")\n", port)); + + if (*namelen > saddr.sa.sa_len) { + *namelen = saddr.sa.sa_len; + } + MEMCPY(name, &saddr, *namelen); + + sock_set_errno(sock, 0); + return 0; +} + +int +lwip_getpeername(int s, struct sockaddr *name, socklen_t *namelen) +{ + return lwip_getaddrname(s, name, namelen, 0); +} + +int +lwip_getsockname(int s, struct sockaddr *name, socklen_t *namelen) +{ + return lwip_getaddrname(s, name, namelen, 1); +} + +int +lwip_getsockopt(int s, int level, int optname, void *optval, socklen_t *optlen) +{ + u8_t err; + struct lwip_sock *sock = get_socket(s); +#if !LWIP_TCPIP_CORE_LOCKING + LWIP_SETGETSOCKOPT_DATA_VAR_DECLARE(data); +#endif /* !LWIP_TCPIP_CORE_LOCKING */ + + if (!sock) { + return -1; + } + + if ((NULL == optval) || (NULL == optlen)) { + sock_set_errno(sock, EFAULT); + return -1; + } + +#if LWIP_TCPIP_CORE_LOCKING + /* core-locking can just call the -impl function */ + LOCK_TCPIP_CORE(); + err = lwip_getsockopt_impl(s, level, optname, optval, optlen); + UNLOCK_TCPIP_CORE(); + +#else /* LWIP_TCPIP_CORE_LOCKING */ + +#if LWIP_MPU_COMPATIBLE + /* MPU_COMPATIBLE copies the optval data, so check for max size here */ + if (*optlen > LWIP_SETGETSOCKOPT_MAXOPTLEN) { + sock_set_errno(sock, ENOBUFS); + return -1; + } +#endif /* LWIP_MPU_COMPATIBLE */ + + LWIP_SETGETSOCKOPT_DATA_VAR_ALLOC(data, sock); + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).s = s; + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).level = level; + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).optname = optname; + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).optlen = *optlen; +#if !LWIP_MPU_COMPATIBLE + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).optval.p = optval; +#endif /* !LWIP_MPU_COMPATIBLE */ + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).err = 0; +#if LWIP_NETCONN_SEM_PER_THREAD + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).completed_sem = LWIP_NETCONN_THREAD_SEM_GET(); +#else + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).completed_sem = &sock->conn->op_completed; +#endif + err = tcpip_callback(lwip_getsockopt_callback, &LWIP_SETGETSOCKOPT_DATA_VAR_REF(data)); + if (err != ERR_OK) { + LWIP_SETGETSOCKOPT_DATA_VAR_FREE(data); + sock_set_errno(sock, err_to_errno(err)); + return -1; + } + sys_arch_sem_wait((sys_sem_t*)(LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).completed_sem), 0); + + /* write back optlen and optval */ + *optlen = LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).optlen; +#if LWIP_MPU_COMPATIBLE + MEMCPY(optval, LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).optval, + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).optlen); +#endif /* LWIP_MPU_COMPATIBLE */ + + /* maybe lwip_getsockopt_internal has changed err */ + err = LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).err; + LWIP_SETGETSOCKOPT_DATA_VAR_FREE(data); +#endif /* LWIP_TCPIP_CORE_LOCKING */ + + sock_set_errno(sock, err); + return err ? -1 : 0; +} + +#if !LWIP_TCPIP_CORE_LOCKING +/** lwip_getsockopt_callback: only used without CORE_LOCKING + * to get into the tcpip_thread + */ +static void +lwip_getsockopt_callback(void *arg) +{ + struct lwip_setgetsockopt_data *data; + LWIP_ASSERT("arg != NULL", arg != NULL); + data = (struct lwip_setgetsockopt_data*)arg; + + data->err = lwip_getsockopt_impl(data->s, data->level, data->optname, +#if LWIP_MPU_COMPATIBLE + data->optval, +#else /* LWIP_MPU_COMPATIBLE */ + data->optval.p, +#endif /* LWIP_MPU_COMPATIBLE */ + &data->optlen); + + sys_sem_signal((sys_sem_t*)(data->completed_sem)); +} +#endif /* LWIP_TCPIP_CORE_LOCKING */ + +/** lwip_getsockopt_impl: the actual implementation of getsockopt: + * same argument as lwip_getsockopt, either called directly or through callback + */ +static u8_t +lwip_getsockopt_impl(int s, int level, int optname, void *optval, socklen_t *optlen) +{ + u8_t err = 0; + struct lwip_sock *sock = tryget_socket(s); + if (!sock) { + return EBADF; + } + + switch (level) { + +/* Level: SOL_SOCKET */ + case SOL_SOCKET: + switch (optname) { + +#if LWIP_TCP + case SO_ACCEPTCONN: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, *optlen, int); + if (NETCONNTYPE_GROUP(sock->conn->type) != NETCONN_TCP) { + return ENOPROTOOPT; + } + if ((sock->conn->pcb.tcp != NULL) && (sock->conn->pcb.tcp->state == LISTEN)) { + *(int*)optval = 1; + } else { + *(int*)optval = 0; + } + break; +#endif /* LWIP_TCP */ + + /* The option flags */ + case SO_BROADCAST: + case SO_KEEPALIVE: +#if SO_REUSE + case SO_REUSEADDR: +#endif /* SO_REUSE */ + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, *optlen, int); + *(int*)optval = ip_get_option(sock->conn->pcb.ip, optname); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, optname=0x%x, ..) = %s\n", + s, optname, (*(int*)optval?"on":"off"))); + break; + + case SO_TYPE: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, *optlen, int); + switch (NETCONNTYPE_GROUP(netconn_type(sock->conn))) { + case NETCONN_RAW: + *(int*)optval = SOCK_RAW; + break; + case NETCONN_TCP: + *(int*)optval = SOCK_STREAM; + break; + case NETCONN_UDP: + *(int*)optval = SOCK_DGRAM; + break; + default: /* unrecognized socket type */ + *(int*)optval = netconn_type(sock->conn); + LWIP_DEBUGF(SOCKETS_DEBUG, + ("lwip_getsockopt(%d, SOL_SOCKET, SO_TYPE): unrecognized socket type %d\n", + s, *(int *)optval)); + } /* switch (netconn_type(sock->conn)) */ + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, SO_TYPE) = %d\n", + s, *(int *)optval)); + break; + + case SO_ERROR: + LWIP_SOCKOPT_CHECK_OPTLEN(*optlen, int); + /* only overwrite ERR_OK or temporary errors */ + if (((sock->err == 0) || (sock->err == EINPROGRESS)) && (sock->conn != NULL)) { + sock_set_errno(sock, err_to_errno(sock->conn->last_err)); + } + *(int *)optval = (sock->err == 0xFF ? (int)-1 : (int)sock->err); + sock->err = 0; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, SO_ERROR) = %d\n", + s, *(int *)optval)); + break; + +#if LWIP_SO_SNDTIMEO + case SO_SNDTIMEO: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, *optlen, LWIP_SO_SNDRCVTIMEO_OPTTYPE); + LWIP_SO_SNDRCVTIMEO_SET(optval, netconn_get_sendtimeout(sock->conn)); + break; +#endif /* LWIP_SO_SNDTIMEO */ +#if LWIP_SO_RCVTIMEO + case SO_RCVTIMEO: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, *optlen, LWIP_SO_SNDRCVTIMEO_OPTTYPE); + LWIP_SO_SNDRCVTIMEO_SET(optval, netconn_get_recvtimeout(sock->conn)); + break; +#endif /* LWIP_SO_RCVTIMEO */ +#if LWIP_SO_RCVBUF + case SO_RCVBUF: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, *optlen, int); + *(int *)optval = netconn_get_recvbufsize(sock->conn); + break; +#endif /* LWIP_SO_RCVBUF */ +#if LWIP_SO_LINGER + case SO_LINGER: + { + s16_t conn_linger; + struct linger* linger = (struct linger*)optval; + LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, *optlen, struct linger); + conn_linger = sock->conn->linger; + if (conn_linger >= 0) { + linger->l_onoff = 1; + linger->l_linger = (int)conn_linger; + } else { + linger->l_onoff = 0; + linger->l_linger = 0; + } + } + break; +#endif /* LWIP_SO_LINGER */ +#if LWIP_UDP + case SO_NO_CHECK: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, *optlen, int, NETCONN_UDP); +#if LWIP_UDPLITE + if ((udp_flags(sock->conn->pcb.udp) & UDP_FLAGS_UDPLITE) != 0) { + /* this flag is only available for UDP, not for UDP lite */ + return EAFNOSUPPORT; + } +#endif /* LWIP_UDPLITE */ + *(int*)optval = (udp_flags(sock->conn->pcb.udp) & UDP_FLAGS_NOCHKSUM) ? 1 : 0; + break; +#endif /* LWIP_UDP*/ + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, SOL_SOCKET, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; + +/* Level: IPPROTO_IP */ + case IPPROTO_IP: + switch (optname) { + case IP_TTL: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, *optlen, int); + *(int*)optval = sock->conn->pcb.ip->ttl; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_TTL) = %d\n", + s, *(int *)optval)); + break; + case IP_TOS: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, *optlen, int); + *(int*)optval = sock->conn->pcb.ip->tos; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_TOS) = %d\n", + s, *(int *)optval)); + break; +#if LWIP_MULTICAST_TX_OPTIONS + case IP_MULTICAST_TTL: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, *optlen, u8_t); + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_UDP) { + return ENOPROTOOPT; + } + *(u8_t*)optval = udp_get_multicast_ttl(sock->conn->pcb.udp); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_MULTICAST_TTL) = %d\n", + s, *(int *)optval)); + break; + case IP_MULTICAST_IF: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, *optlen, struct in_addr); + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_UDP) { + return ENOPROTOOPT; + } + inet_addr_from_ip4addr((struct in_addr*)optval, udp_get_multicast_netif_addr(sock->conn->pcb.udp)); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_MULTICAST_IF) = 0x%"X32_F"\n", + s, *(u32_t *)optval)); + break; + case IP_MULTICAST_LOOP: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, *optlen, u8_t); + if ((sock->conn->pcb.udp->flags & UDP_FLAGS_MULTICAST_LOOP) != 0) { + *(u8_t*)optval = 1; + } else { + *(u8_t*)optval = 0; + } + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, IP_MULTICAST_LOOP) = %d\n", + s, *(int *)optval)); + break; +#endif /* LWIP_MULTICAST_TX_OPTIONS */ + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IP, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; + +#if LWIP_TCP +/* Level: IPPROTO_TCP */ + case IPPROTO_TCP: + /* Special case: all IPPROTO_TCP option take an int */ + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, *optlen, int, NETCONN_TCP); + if (sock->conn->pcb.tcp->state == LISTEN) { + return EINVAL; + } + switch (optname) { + case TCP_NODELAY: + *(int*)optval = tcp_nagle_disabled(sock->conn->pcb.tcp); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, TCP_NODELAY) = %s\n", + s, (*(int*)optval)?"on":"off") ); + break; + case TCP_KEEPALIVE: + *(int*)optval = (int)sock->conn->pcb.tcp->keep_idle; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, TCP_KEEPALIVE) = %d\n", + s, *(int *)optval)); + break; + +#if LWIP_TCP_KEEPALIVE + case TCP_KEEPIDLE: + *(int*)optval = (int)(sock->conn->pcb.tcp->keep_idle/1000); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, TCP_KEEPIDLE) = %d\n", + s, *(int *)optval)); + break; + case TCP_KEEPINTVL: + *(int*)optval = (int)(sock->conn->pcb.tcp->keep_intvl/1000); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, TCP_KEEPINTVL) = %d\n", + s, *(int *)optval)); + break; + case TCP_KEEPCNT: + *(int*)optval = (int)sock->conn->pcb.tcp->keep_cnt; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, TCP_KEEPCNT) = %d\n", + s, *(int *)optval)); + break; +#endif /* LWIP_TCP_KEEPALIVE */ + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_TCP, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; +#endif /* LWIP_TCP */ + +#if LWIP_IPV6 +/* Level: IPPROTO_IPV6 */ + case IPPROTO_IPV6: + switch (optname) { + case IPV6_V6ONLY: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, *optlen, int); + *(int*)optval = (netconn_get_ipv6only(sock->conn) ? 1 : 0); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IPV6, IPV6_V6ONLY) = %d\n", + s, *(int *)optval)); + break; + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_IPV6, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; +#endif /* LWIP_IPV6 */ + +#if LWIP_UDP && LWIP_UDPLITE + /* Level: IPPROTO_UDPLITE */ + case IPPROTO_UDPLITE: + /* Special case: all IPPROTO_UDPLITE option take an int */ + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, *optlen, int); + /* If this is no UDP lite socket, ignore any options. */ + if (!NETCONNTYPE_ISUDPLITE(netconn_type(sock->conn))) { + return ENOPROTOOPT; + } + switch (optname) { + case UDPLITE_SEND_CSCOV: + *(int*)optval = sock->conn->pcb.udp->chksum_len_tx; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV) = %d\n", + s, (*(int*)optval)) ); + break; + case UDPLITE_RECV_CSCOV: + *(int*)optval = sock->conn->pcb.udp->chksum_len_rx; + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV) = %d\n", + s, (*(int*)optval)) ); + break; + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_UDPLITE, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; +#endif /* LWIP_UDP */ + /* Level: IPPROTO_RAW */ + case IPPROTO_RAW: + switch (optname) { +#if LWIP_IPV6 && LWIP_RAW + case IPV6_CHECKSUM: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, *optlen, int, NETCONN_RAW); + if (sock->conn->pcb.raw->chksum_reqd == 0) { + *(int *)optval = -1; + } else { + *(int *)optval = sock->conn->pcb.raw->chksum_offset; + } + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_RAW, IPV6_CHECKSUM) = %d\n", + s, (*(int*)optval)) ); + break; +#endif /* LWIP_IPV6 && LWIP_RAW */ + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, IPPROTO_RAW, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_getsockopt(%d, level=0x%x, UNIMPL: optname=0x%x, ..)\n", + s, level, optname)); + err = ENOPROTOOPT; + break; + } /* switch (level) */ + + return err; +} + +int +lwip_setsockopt(int s, int level, int optname, const void *optval, socklen_t optlen) +{ + u8_t err = 0; + struct lwip_sock *sock = get_socket(s); +#if !LWIP_TCPIP_CORE_LOCKING + LWIP_SETGETSOCKOPT_DATA_VAR_DECLARE(data); +#endif /* !LWIP_TCPIP_CORE_LOCKING */ + + if (!sock) { + return -1; + } + + if (NULL == optval) { + sock_set_errno(sock, EFAULT); + return -1; + } + +#if LWIP_TCPIP_CORE_LOCKING + /* core-locking can just call the -impl function */ + LOCK_TCPIP_CORE(); + err = lwip_setsockopt_impl(s, level, optname, optval, optlen); + UNLOCK_TCPIP_CORE(); + +#else /* LWIP_TCPIP_CORE_LOCKING */ + +#if LWIP_MPU_COMPATIBLE + /* MPU_COMPATIBLE copies the optval data, so check for max size here */ + if (optlen > LWIP_SETGETSOCKOPT_MAXOPTLEN) { + sock_set_errno(sock, ENOBUFS); + return -1; + } +#endif /* LWIP_MPU_COMPATIBLE */ + + LWIP_SETGETSOCKOPT_DATA_VAR_ALLOC(data, sock); + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).s = s; + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).level = level; + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).optname = optname; + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).optlen = optlen; +#if LWIP_MPU_COMPATIBLE + MEMCPY(LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).optval, optval, optlen); +#else /* LWIP_MPU_COMPATIBLE */ + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).optval.pc = (const void*)optval; +#endif /* LWIP_MPU_COMPATIBLE */ + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).err = 0; +#if LWIP_NETCONN_SEM_PER_THREAD + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).completed_sem = LWIP_NETCONN_THREAD_SEM_GET(); +#else + LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).completed_sem = &sock->conn->op_completed; +#endif + err = tcpip_callback(lwip_setsockopt_callback, &LWIP_SETGETSOCKOPT_DATA_VAR_REF(data)); + if (err != ERR_OK) { + LWIP_SETGETSOCKOPT_DATA_VAR_FREE(data); + sock_set_errno(sock, err_to_errno(err)); + return -1; + } + sys_arch_sem_wait((sys_sem_t*)(LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).completed_sem), 0); + + /* maybe lwip_getsockopt_internal has changed err */ + err = LWIP_SETGETSOCKOPT_DATA_VAR_REF(data).err; + LWIP_SETGETSOCKOPT_DATA_VAR_FREE(data); +#endif /* LWIP_TCPIP_CORE_LOCKING */ + + sock_set_errno(sock, err); + return err ? -1 : 0; +} + +#if !LWIP_TCPIP_CORE_LOCKING +/** lwip_setsockopt_callback: only used without CORE_LOCKING + * to get into the tcpip_thread + */ +static void +lwip_setsockopt_callback(void *arg) +{ + struct lwip_setgetsockopt_data *data; + LWIP_ASSERT("arg != NULL", arg != NULL); + data = (struct lwip_setgetsockopt_data*)arg; + + data->err = lwip_setsockopt_impl(data->s, data->level, data->optname, +#if LWIP_MPU_COMPATIBLE + data->optval, +#else /* LWIP_MPU_COMPATIBLE */ + data->optval.pc, +#endif /* LWIP_MPU_COMPATIBLE */ + data->optlen); + + sys_sem_signal((sys_sem_t*)(data->completed_sem)); +} +#endif /* LWIP_TCPIP_CORE_LOCKING */ + +/** lwip_setsockopt_impl: the actual implementation of setsockopt: + * same argument as lwip_setsockopt, either called directly or through callback + */ +static u8_t +lwip_setsockopt_impl(int s, int level, int optname, const void *optval, socklen_t optlen) +{ + u8_t err = 0; + struct lwip_sock *sock = tryget_socket(s); + if (!sock) { + return EBADF; + } + + switch (level) { + +/* Level: SOL_SOCKET */ + case SOL_SOCKET: + switch (optname) { + + /* SO_ACCEPTCONN is get-only */ + + /* The option flags */ + case SO_BROADCAST: + case SO_KEEPALIVE: +#if SO_REUSE + case SO_REUSEADDR: +#endif /* SO_REUSE */ + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, optlen, int); + if (*(const int*)optval) { + ip_set_option(sock->conn->pcb.ip, optname); + } else { + ip_reset_option(sock->conn->pcb.ip, optname); + } + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, SOL_SOCKET, optname=0x%x, ..) -> %s\n", + s, optname, (*(const int*)optval?"on":"off"))); + break; + + /* SO_TYPE is get-only */ + /* SO_ERROR is get-only */ + +#if LWIP_SO_SNDTIMEO + case SO_SNDTIMEO: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, optlen, LWIP_SO_SNDRCVTIMEO_OPTTYPE); + netconn_set_sendtimeout(sock->conn, LWIP_SO_SNDRCVTIMEO_GET_MS(optval)); + break; +#endif /* LWIP_SO_SNDTIMEO */ +#if LWIP_SO_RCVTIMEO + case SO_RCVTIMEO: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, optlen, LWIP_SO_SNDRCVTIMEO_OPTTYPE); + netconn_set_recvtimeout(sock->conn, (int)LWIP_SO_SNDRCVTIMEO_GET_MS(optval)); + break; +#endif /* LWIP_SO_RCVTIMEO */ +#if LWIP_SO_RCVBUF + case SO_RCVBUF: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, optlen, int); + netconn_set_recvbufsize(sock->conn, *(const int*)optval); + break; +#endif /* LWIP_SO_RCVBUF */ +#if LWIP_SO_LINGER + case SO_LINGER: + { + const struct linger* linger = (const struct linger*)optval; + LWIP_SOCKOPT_CHECK_OPTLEN_CONN(sock, optlen, struct linger); + if (linger->l_onoff) { + int lingersec = linger->l_linger; + if (lingersec < 0) { + return EINVAL; + } + if (lingersec > 0xFFFF) { + lingersec = 0xFFFF; + } + sock->conn->linger = (s16_t)lingersec; + } else { + sock->conn->linger = -1; + } + } + break; +#endif /* LWIP_SO_LINGER */ +#if LWIP_UDP + case SO_NO_CHECK: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, int, NETCONN_UDP); +#if LWIP_UDPLITE + if ((udp_flags(sock->conn->pcb.udp) & UDP_FLAGS_UDPLITE) != 0) { + /* this flag is only available for UDP, not for UDP lite */ + return EAFNOSUPPORT; + } +#endif /* LWIP_UDPLITE */ + if (*(const int*)optval) { + udp_setflags(sock->conn->pcb.udp, udp_flags(sock->conn->pcb.udp) | UDP_FLAGS_NOCHKSUM); + } else { + udp_setflags(sock->conn->pcb.udp, udp_flags(sock->conn->pcb.udp) & ~UDP_FLAGS_NOCHKSUM); + } + break; +#endif /* LWIP_UDP */ + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, SOL_SOCKET, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; + +/* Level: IPPROTO_IP */ + case IPPROTO_IP: + switch (optname) { + case IP_TTL: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, optlen, int); + sock->conn->pcb.ip->ttl = (u8_t)(*(const int*)optval); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IP, IP_TTL, ..) -> %d\n", + s, sock->conn->pcb.ip->ttl)); + break; + case IP_TOS: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, optlen, int); + sock->conn->pcb.ip->tos = (u8_t)(*(const int*)optval); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IP, IP_TOS, ..)-> %d\n", + s, sock->conn->pcb.ip->tos)); + break; +#if LWIP_MULTICAST_TX_OPTIONS + case IP_MULTICAST_TTL: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, u8_t, NETCONN_UDP); + udp_set_multicast_ttl(sock->conn->pcb.udp, (u8_t)(*(const u8_t*)optval)); + break; + case IP_MULTICAST_IF: + { + ip4_addr_t if_addr; + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, struct in_addr, NETCONN_UDP); + inet_addr_to_ip4addr(&if_addr, (const struct in_addr*)optval); + udp_set_multicast_netif_addr(sock->conn->pcb.udp, &if_addr); + } + break; + case IP_MULTICAST_LOOP: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, u8_t, NETCONN_UDP); + if (*(const u8_t*)optval) { + udp_setflags(sock->conn->pcb.udp, udp_flags(sock->conn->pcb.udp) | UDP_FLAGS_MULTICAST_LOOP); + } else { + udp_setflags(sock->conn->pcb.udp, udp_flags(sock->conn->pcb.udp) & ~UDP_FLAGS_MULTICAST_LOOP); + } + break; +#endif /* LWIP_MULTICAST_TX_OPTIONS */ +#if LWIP_IGMP + case IP_ADD_MEMBERSHIP: + case IP_DROP_MEMBERSHIP: + { + /* If this is a TCP or a RAW socket, ignore these options. */ + /* @todo: assign membership to this socket so that it is dropped when closing the socket */ + err_t igmp_err; + const struct ip_mreq *imr = (const struct ip_mreq *)optval; + ip4_addr_t if_addr; + ip4_addr_t multi_addr; + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, struct ip_mreq, NETCONN_UDP); + inet_addr_to_ip4addr(&if_addr, &imr->imr_interface); + inet_addr_to_ip4addr(&multi_addr, &imr->imr_multiaddr); + if (optname == IP_ADD_MEMBERSHIP) { + if (!lwip_socket_register_membership(s, &if_addr, &multi_addr)) { + /* cannot track membership (out of memory) */ + err = ENOMEM; + igmp_err = ERR_OK; + } else { + igmp_err = igmp_joingroup(&if_addr, &multi_addr); + } + } else { + igmp_err = igmp_leavegroup(&if_addr, &multi_addr); + lwip_socket_unregister_membership(s, &if_addr, &multi_addr); + } + if (igmp_err != ERR_OK) { + err = EADDRNOTAVAIL; + } + } + break; +#endif /* LWIP_IGMP */ + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IP, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; + +#if LWIP_TCP +/* Level: IPPROTO_TCP */ + case IPPROTO_TCP: + /* Special case: all IPPROTO_TCP option take an int */ + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, int, NETCONN_TCP); + if (sock->conn->pcb.tcp->state == LISTEN) { + return EINVAL; + } + switch (optname) { + case TCP_NODELAY: + if (*(const int*)optval) { + tcp_nagle_disable(sock->conn->pcb.tcp); + } else { + tcp_nagle_enable(sock->conn->pcb.tcp); + } + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_NODELAY) -> %s\n", + s, (*(const int *)optval)?"on":"off") ); + break; + case TCP_KEEPALIVE: + sock->conn->pcb.tcp->keep_idle = (u32_t)(*(const int*)optval); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPALIVE) -> %"U32_F"\n", + s, sock->conn->pcb.tcp->keep_idle)); + break; + +#if LWIP_TCP_KEEPALIVE + case TCP_KEEPIDLE: + sock->conn->pcb.tcp->keep_idle = 1000*(u32_t)(*(const int*)optval); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPIDLE) -> %"U32_F"\n", + s, sock->conn->pcb.tcp->keep_idle)); + break; + case TCP_KEEPINTVL: + sock->conn->pcb.tcp->keep_intvl = 1000*(u32_t)(*(const int*)optval); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPINTVL) -> %"U32_F"\n", + s, sock->conn->pcb.tcp->keep_intvl)); + break; + case TCP_KEEPCNT: + sock->conn->pcb.tcp->keep_cnt = (u32_t)(*(const int*)optval); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, TCP_KEEPCNT) -> %"U32_F"\n", + s, sock->conn->pcb.tcp->keep_cnt)); + break; +#endif /* LWIP_TCP_KEEPALIVE */ + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_TCP, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; +#endif /* LWIP_TCP*/ + +#if LWIP_IPV6 +/* Level: IPPROTO_IPV6 */ + case IPPROTO_IPV6: + switch (optname) { + case IPV6_V6ONLY: + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, int, NETCONN_TCP); + if (*(const int*)optval) { + netconn_set_ipv6only(sock->conn, 1); + } else { + netconn_set_ipv6only(sock->conn, 0); + } + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IPV6, IPV6_V6ONLY, ..) -> %d\n", + s, (netconn_get_ipv6only(sock->conn) ? 1 : 0))); + break; + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_IPV6, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; +#endif /* LWIP_IPV6 */ + +#if LWIP_UDP && LWIP_UDPLITE + /* Level: IPPROTO_UDPLITE */ + case IPPROTO_UDPLITE: + /* Special case: all IPPROTO_UDPLITE option take an int */ + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB(sock, optlen, int); + /* If this is no UDP lite socket, ignore any options. */ + if (!NETCONNTYPE_ISUDPLITE(netconn_type(sock->conn))) { + return ENOPROTOOPT; + } + switch (optname) { + case UDPLITE_SEND_CSCOV: + if ((*(const int*)optval != 0) && ((*(const int*)optval < 8) || (*(const int*)optval > 0xffff))) { + /* don't allow illegal values! */ + sock->conn->pcb.udp->chksum_len_tx = 8; + } else { + sock->conn->pcb.udp->chksum_len_tx = (u16_t)*(const int*)optval; + } + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_UDPLITE, UDPLITE_SEND_CSCOV) -> %d\n", + s, (*(const int*)optval)) ); + break; + case UDPLITE_RECV_CSCOV: + if ((*(const int*)optval != 0) && ((*(const int*)optval < 8) || (*(const int*)optval > 0xffff))) { + /* don't allow illegal values! */ + sock->conn->pcb.udp->chksum_len_rx = 8; + } else { + sock->conn->pcb.udp->chksum_len_rx = (u16_t)*(const int*)optval; + } + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_UDPLITE, UDPLITE_RECV_CSCOV) -> %d\n", + s, (*(const int*)optval)) ); + break; + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_UDPLITE, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; +#endif /* LWIP_UDP */ + /* Level: IPPROTO_RAW */ + case IPPROTO_RAW: + switch (optname) { +#if LWIP_IPV6 && LWIP_RAW + case IPV6_CHECKSUM: + /* It should not be possible to disable the checksum generation with ICMPv6 + * as per RFC 3542 chapter 3.1 */ + if(sock->conn->pcb.raw->protocol == IPPROTO_ICMPV6) { + return EINVAL; + } + + LWIP_SOCKOPT_CHECK_OPTLEN_CONN_PCB_TYPE(sock, optlen, int, NETCONN_RAW); + if (*(const int *)optval < 0) { + sock->conn->pcb.raw->chksum_reqd = 0; + } else if (*(const int *)optval & 1) { + /* Per RFC3542, odd offsets are not allowed */ + return EINVAL; + } else { + sock->conn->pcb.raw->chksum_reqd = 1; + sock->conn->pcb.raw->chksum_offset = (u16_t)*(const int *)optval; + } + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_RAW, IPV6_CHECKSUM, ..) -> %d\n", + s, sock->conn->pcb.raw->chksum_reqd)); + break; +#endif /* LWIP_IPV6 && LWIP_RAW */ + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, IPPROTO_RAW, UNIMPL: optname=0x%x, ..)\n", + s, optname)); + err = ENOPROTOOPT; + break; + } /* switch (optname) */ + break; + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_setsockopt(%d, level=0x%x, UNIMPL: optname=0x%x, ..)\n", + s, level, optname)); + err = ENOPROTOOPT; + break; + } /* switch (level) */ + + return err; +} + +int +lwip_ioctl(int s, long cmd, void *argp) +{ + struct lwip_sock *sock = get_socket(s); + u8_t val; +#if LWIP_SO_RCVBUF + u16_t buflen = 0; + int recv_avail; +#endif /* LWIP_SO_RCVBUF */ + + if (!sock) { + return -1; + } + + switch (cmd) { +#if LWIP_SO_RCVBUF || LWIP_FIONREAD_LINUXMODE + case FIONREAD: + if (!argp) { + sock_set_errno(sock, EINVAL); + return -1; + } +#if LWIP_FIONREAD_LINUXMODE + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) { + struct pbuf *p; + if (sock->lastdata) { + p = ((struct netbuf *)sock->lastdata)->p; + *((int*)argp) = p->tot_len - sock->lastoffset; + } else { + struct netbuf *rxbuf; + err_t err; + if (sock->rcvevent <= 0) { + *((int*)argp) = 0; + } else { + err = netconn_recv(sock->conn, &rxbuf); + if (err != ERR_OK) { + *((int*)argp) = 0; + } else { + sock->lastdata = rxbuf; + sock->lastoffset = 0; + *((int*)argp) = rxbuf->p->tot_len; + } + } + } + return 0; + } +#endif /* LWIP_FIONREAD_LINUXMODE */ + +#if LWIP_SO_RCVBUF + /* we come here if either LWIP_FIONREAD_LINUXMODE==0 or this is a TCP socket */ + SYS_ARCH_GET(sock->conn->recv_avail, recv_avail); + if (recv_avail < 0) { + recv_avail = 0; + } + *((int*)argp) = recv_avail; + + /* Check if there is data left from the last recv operation. /maq 041215 */ + if (sock->lastdata) { + struct pbuf *p = (struct pbuf *)sock->lastdata; + if (NETCONNTYPE_GROUP(netconn_type(sock->conn)) != NETCONN_TCP) { + p = ((struct netbuf *)p)->p; + } + buflen = p->tot_len; + buflen -= sock->lastoffset; + + *((int*)argp) += buflen; + } + + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, FIONREAD, %p) = %"U16_F"\n", s, argp, *((u16_t*)argp))); + sock_set_errno(sock, 0); + return 0; +#else /* LWIP_SO_RCVBUF */ + break; +#endif /* LWIP_SO_RCVBUF */ +#endif /* LWIP_SO_RCVBUF || LWIP_FIONREAD_LINUXMODE */ + + case (long)FIONBIO: + val = 0; + if (argp && *(u32_t*)argp) { + val = 1; + } + netconn_set_nonblocking(sock->conn, val); + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, FIONBIO, %d)\n", s, val)); + sock_set_errno(sock, 0); + return 0; + + default: + break; + } /* switch (cmd) */ + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_ioctl(%d, UNIMPL: 0x%lx, %p)\n", s, cmd, argp)); + sock_set_errno(sock, ENOSYS); /* not yet implemented */ + return -1; +} + +/** A minimal implementation of fcntl. + * Currently only the commands F_GETFL and F_SETFL are implemented. + * Only the flag O_NONBLOCK is implemented. + */ +int +lwip_fcntl(int s, int cmd, int val) +{ + struct lwip_sock *sock = get_socket(s); + int ret = -1; + + if (!sock) { + return -1; + } + + switch (cmd) { + case F_GETFL: + ret = netconn_is_nonblocking(sock->conn) ? O_NONBLOCK : 0; + sock_set_errno(sock, 0); + break; + case F_SETFL: + if ((val & ~O_NONBLOCK) == 0) { + /* only O_NONBLOCK, all other bits are zero */ + netconn_set_nonblocking(sock->conn, val & O_NONBLOCK); + ret = 0; + sock_set_errno(sock, 0); + } else { + sock_set_errno(sock, ENOSYS); /* not yet implemented */ + } + break; + default: + LWIP_DEBUGF(SOCKETS_DEBUG, ("lwip_fcntl(%d, UNIMPL: %d, %d)\n", s, cmd, val)); + sock_set_errno(sock, ENOSYS); /* not yet implemented */ + break; + } + return ret; +} + +#if LWIP_IGMP +/** Register a new IGMP membership. On socket close, the membership is dropped automatically. + * + * ATTENTION: this function is called from tcpip_thread (or under CORE_LOCK). + * + * @return 1 on success, 0 on failure + */ +static int +lwip_socket_register_membership(int s, const ip4_addr_t *if_addr, const ip4_addr_t *multi_addr) +{ + struct lwip_sock *sock = get_socket(s); + int i; + + if (!sock) { + return 0; + } + + for (i = 0; i < LWIP_SOCKET_MAX_MEMBERSHIPS; i++) { + if (socket_ipv4_multicast_memberships[i].sock == NULL) { + socket_ipv4_multicast_memberships[i].sock = sock; + ip4_addr_copy(socket_ipv4_multicast_memberships[i].if_addr, *if_addr); + ip4_addr_copy(socket_ipv4_multicast_memberships[i].multi_addr, *multi_addr); + return 1; + } + } + return 0; +} + +/** Unregister a previously registered membership. This prevents dropping the membership + * on socket close. + * + * ATTENTION: this function is called from tcpip_thread (or under CORE_LOCK). + */ +static void +lwip_socket_unregister_membership(int s, const ip4_addr_t *if_addr, const ip4_addr_t *multi_addr) +{ + struct lwip_sock *sock = get_socket(s); + int i; + + if (!sock) { + return; + } + + for (i = 0; i < LWIP_SOCKET_MAX_MEMBERSHIPS; i++) { + if ((socket_ipv4_multicast_memberships[i].sock == sock) && + ip4_addr_cmp(&socket_ipv4_multicast_memberships[i].if_addr, if_addr) && + ip4_addr_cmp(&socket_ipv4_multicast_memberships[i].multi_addr, multi_addr)) { + socket_ipv4_multicast_memberships[i].sock = NULL; + ip4_addr_set_zero(&socket_ipv4_multicast_memberships[i].if_addr); + ip4_addr_set_zero(&socket_ipv4_multicast_memberships[i].multi_addr); + return; + } + } +} + +/** Drop all memberships of a socket that were not dropped explicitly via setsockopt. + * + * ATTENTION: this function is NOT called from tcpip_thread (or under CORE_LOCK). + */ +static void +lwip_socket_drop_registered_memberships(int s) +{ + struct lwip_sock *sock = get_socket(s); + int i; + + if (!sock) { + return; + } + + for (i = 0; i < LWIP_SOCKET_MAX_MEMBERSHIPS; i++) { + if (socket_ipv4_multicast_memberships[i].sock == sock) { + ip_addr_t multi_addr, if_addr; + ip_addr_copy_from_ip4(multi_addr, socket_ipv4_multicast_memberships[i].multi_addr); + ip_addr_copy_from_ip4(if_addr, socket_ipv4_multicast_memberships[i].if_addr); + socket_ipv4_multicast_memberships[i].sock = NULL; + ip4_addr_set_zero(&socket_ipv4_multicast_memberships[i].if_addr); + ip4_addr_set_zero(&socket_ipv4_multicast_memberships[i].multi_addr); + + netconn_join_leave_group(sock->conn, &multi_addr, &if_addr, NETCONN_LEAVE); + } + } +} +#endif /* LWIP_IGMP */ +#endif /* LWIP_SOCKET */ diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/tcpip.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/tcpip.c new file mode 100644 index 0000000..07b2f98 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/external/lwip/src/api/tcpip.c @@ -0,0 +1,518 @@ +/** + * @file + * Sequential API Main thread module + * + */ + +/* + * 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> + * + */ + +#include "lwip/opt.h" + +#if !NO_SYS /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/priv/tcpip_priv.h" +#include "lwip/sys.h" +#include "lwip/memp.h" +#include "lwip/mem.h" +#include "lwip/init.h" +#include "lwip/ip.h" +#include "lwip/pbuf.h" +#include "lwip/etharp.h" +#include "netif/ethernet.h" + +#define TCPIP_MSG_VAR_REF(name) API_VAR_REF(name) +#define TCPIP_MSG_VAR_DECLARE(name) API_VAR_DECLARE(struct tcpip_msg, name) +#define TCPIP_MSG_VAR_ALLOC(name) API_VAR_ALLOC(struct tcpip_msg, MEMP_TCPIP_MSG_API, name, ERR_MEM) +#define TCPIP_MSG_VAR_FREE(name) API_VAR_FREE(MEMP_TCPIP_MSG_API, name) + +/* global variables */ +static tcpip_init_done_fn tcpip_init_done; +static void *tcpip_init_done_arg; +static sys_mbox_t mbox; + +#if LWIP_TCPIP_CORE_LOCKING +/** The global semaphore to lock the stack. */ +sys_mutex_t lock_tcpip_core; +#endif /* LWIP_TCPIP_CORE_LOCKING */ + +#if LWIP_TIMERS +/* wait for a message, timeouts are processed while waiting */ +#define TCPIP_MBOX_FETCH(mbox, msg) sys_timeouts_mbox_fetch(mbox, msg) +#else /* LWIP_TIMERS */ +/* wait for a message with timers disabled (e.g. pass a timer-check trigger into tcpip_thread) */ +#define TCPIP_MBOX_FETCH(mbox, msg) sys_mbox_fetch(mbox, msg) +#endif /* LWIP_TIMERS */ + +/** + * The main lwIP thread. This thread has exclusive access to lwIP core functions + * (unless access to them is not locked). Other threads communicate with this + * thread using message boxes. + * + * It also starts all the timers to make sure they are running in the right + * thread context. + * + * @param arg unused argument + */ +static void +tcpip_thread(void *arg) +{ + struct tcpip_msg *msg; + LWIP_UNUSED_ARG(arg); + + if (tcpip_init_done != NULL) { + tcpip_init_done(tcpip_init_done_arg); + } + + LOCK_TCPIP_CORE(); + while (1) { /* MAIN Loop */ + UNLOCK_TCPIP_CORE(); + LWIP_TCPIP_THREAD_ALIVE(); + /* wait for a message, timeouts are processed while waiting */ + TCPIP_MBOX_FETCH(&mbox, (void **)&msg); + LOCK_TCPIP_CORE(); + if (msg == NULL) { + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: invalid message: NULL\n")); + LWIP_ASSERT("tcpip_thread: invalid message", 0); + continue; + } + switch (msg->type) { +#if !LWIP_TCPIP_CORE_LOCKING + case TCPIP_MSG_API: + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: API message %p\n", (void *)msg)); + msg->msg.api_msg.function(msg->msg.api_msg.msg); + break; + case TCPIP_MSG_API_CALL: + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: API CALL message %p\n", (void *)msg)); + msg->msg.api_call.arg->err = msg->msg.api_call.function(msg->msg.api_call.arg); + sys_sem_signal(msg->msg.api_call.sem); + break; +#endif /* !LWIP_TCPIP_CORE_LOCKING */ + +#if !LWIP_TCPIP_CORE_LOCKING_INPUT + case TCPIP_MSG_INPKT: + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: PACKET %p\n", (void *)msg)); + msg->msg.inp.input_fn(msg->msg.inp.p, msg->msg.inp.netif); + memp_free(MEMP_TCPIP_MSG_INPKT, msg); + break; +#endif /* !LWIP_TCPIP_CORE_LOCKING_INPUT */ + +#if LWIP_TCPIP_TIMEOUT && LWIP_TIMERS + case TCPIP_MSG_TIMEOUT: + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: TIMEOUT %p\n", (void *)msg)); + sys_timeout(msg->msg.tmo.msecs, msg->msg.tmo.h, msg->msg.tmo.arg); + memp_free(MEMP_TCPIP_MSG_API, msg); + break; + case TCPIP_MSG_UNTIMEOUT: + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: UNTIMEOUT %p\n", (void *)msg)); + sys_untimeout(msg->msg.tmo.h, msg->msg.tmo.arg); + memp_free(MEMP_TCPIP_MSG_API, msg); + break; +#endif /* LWIP_TCPIP_TIMEOUT && LWIP_TIMERS */ + + case TCPIP_MSG_CALLBACK: + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: CALLBACK %p\n", (void *)msg)); + msg->msg.cb.function(msg->msg.cb.ctx); + memp_free(MEMP_TCPIP_MSG_API, msg); + break; + + case TCPIP_MSG_CALLBACK_STATIC: + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: CALLBACK_STATIC %p\n", (void *)msg)); + msg->msg.cb.function(msg->msg.cb.ctx); + break; + + default: + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: invalid message: %d\n", msg->type)); + LWIP_ASSERT("tcpip_thread: invalid message", 0); + break; + } + } +} + +/** + * Pass a received packet to tcpip_thread for input processing + * + * @param p the received packet + * @param inp the network interface on which the packet was received + * @param input_fn input function to call + */ +err_t +tcpip_inpkt(struct pbuf *p, struct netif *inp, netif_input_fn input_fn) +{ +#if LWIP_TCPIP_CORE_LOCKING_INPUT + err_t ret; + LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_inpkt: PACKET %p/%p\n", (void *)p, (void *)inp)); + LOCK_TCPIP_CORE(); + ret = input_fn(p, inp); + UNLOCK_TCPIP_CORE(); + return ret; +#else /* LWIP_TCPIP_CORE_LOCKING_INPUT */ + struct tcpip_msg *msg; + + LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(mbox)); + + msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_INPKT); + if (msg == NULL) { + return ERR_MEM; + } + + msg->type = TCPIP_MSG_INPKT; + msg->msg.inp.p = p; + msg->msg.inp.netif = inp; + msg->msg.inp.input_fn = input_fn; + if (sys_mbox_trypost(&mbox, msg) != ERR_OK) { + memp_free(MEMP_TCPIP_MSG_INPKT, msg); + return ERR_MEM; + } + return ERR_OK; +#endif /* LWIP_TCPIP_CORE_LOCKING_INPUT */ +} + +/** + * @ingroup lwip_os + * Pass a received packet to tcpip_thread for input processing with + * ethernet_input or ip_input. Don't call directly, pass to netif_add() + * and call netif->input(). + * + * @param p the received packet, p->payload pointing to the Ethernet header or + * to an IP header (if inp doesn't have NETIF_FLAG_ETHARP or + * NETIF_FLAG_ETHERNET flags) + * @param inp the network interface on which the packet was received + */ +err_t +tcpip_input(struct pbuf *p, struct netif *inp) +{ +#if LWIP_ETHERNET + if (inp->flags & (NETIF_FLAG_ETHARP | NETIF_FLAG_ETHERNET)) { + return tcpip_inpkt(p, inp, ethernet_input); + } else +#endif /* LWIP_ETHERNET */ + return tcpip_inpkt(p, inp, ip_input); +} + +/** + * Call a specific function in the thread context of + * tcpip_thread for easy access synchronization. + * A function called in that way may access lwIP core code + * without fearing concurrent access. + * + * @param function the function to call + * @param ctx parameter passed to f + * @param block 1 to block until the request is posted, 0 to non-blocking mode + * @return ERR_OK if the function was called, another err_t if not + */ +err_t +tcpip_callback_with_block(tcpip_callback_fn function, void *ctx, u8_t block) +{ + struct tcpip_msg *msg; + + LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(mbox)); + + msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API); + if (msg == NULL) { + return ERR_MEM; + } + + msg->type = TCPIP_MSG_CALLBACK; + msg->msg.cb.function = function; + msg->msg.cb.ctx = ctx; + if (block) { + sys_mbox_post(&mbox, msg); + } else { + if (sys_mbox_trypost(&mbox, msg) != ERR_OK) { + memp_free(MEMP_TCPIP_MSG_API, msg); + return ERR_MEM; + } + } + return ERR_OK; +} + +#if LWIP_TCPIP_TIMEOUT && LWIP_TIMERS +/** + * call sys_timeout in tcpip_thread + * + * @param msecs time in milliseconds for timeout + * @param h function to be called on timeout + * @param arg argument to pass to timeout function h + * @return ERR_MEM on memory error, ERR_OK otherwise + */ +err_t +tcpip_timeout(u32_t msecs, sys_timeout_handler h, void *arg) +{ + struct tcpip_msg *msg; + + LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(mbox)); + + msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API); + if (msg == NULL) { + return ERR_MEM; + } + + msg->type = TCPIP_MSG_TIMEOUT; + msg->msg.tmo.msecs = msecs; + msg->msg.tmo.h = h; + msg->msg.tmo.arg = arg; + sys_mbox_post(&mbox, msg); + return ERR_OK; +} + +/** + * call sys_untimeout in tcpip_thread + * + * @param h function to be called on timeout + * @param arg argument to pass to timeout function h + * @return ERR_MEM on memory error, ERR_OK otherwise + */ +err_t +tcpip_untimeout(sys_timeout_handler h, void *arg) +{ + struct tcpip_msg *msg; + + LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(mbox)); + + msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API); + if (msg == NULL) { + return ERR_MEM; + } + + msg->type = TCPIP_MSG_UNTIMEOUT; + msg->msg.tmo.h = h; + msg->msg.tmo.arg = arg; + sys_mbox_post(&mbox, msg); + return ERR_OK; +} +#endif /* LWIP_TCPIP_TIMEOUT && LWIP_TIMERS */ + + +/** + * Sends a message to TCPIP thread to call a function. Caller thread blocks on + * on a provided semaphore, which ist NOT automatically signalled by TCPIP thread, + * this has to be done by the user. + * It is recommended to use LWIP_TCPIP_CORE_LOCKING since this is the way + * with least runtime overhead. + * + * @param fn function to be called from TCPIP thread + * @param apimsg argument to API function + * @param sem semaphore to wait on + * @return ERR_OK if the function was called, another err_t if not + */ +err_t +tcpip_send_msg_wait_sem(tcpip_callback_fn fn, void *apimsg, sys_sem_t* sem) +{ +#if LWIP_TCPIP_CORE_LOCKING + LWIP_UNUSED_ARG(sem); + LOCK_TCPIP_CORE(); + fn(apimsg); + UNLOCK_TCPIP_CORE(); + return ERR_OK; +#else /* LWIP_TCPIP_CORE_LOCKING */ + TCPIP_MSG_VAR_DECLARE(msg); + + LWIP_ASSERT("semaphore not initialized", sys_sem_valid(sem)); + LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(mbox)); + + TCPIP_MSG_VAR_ALLOC(msg); + TCPIP_MSG_VAR_REF(msg).type = TCPIP_MSG_API; + TCPIP_MSG_VAR_REF(msg).msg.api_msg.function = fn; + TCPIP_MSG_VAR_REF(msg).msg.api_msg.msg = apimsg; + sys_mbox_post(&mbox, &TCPIP_MSG_VAR_REF(msg)); + sys_arch_sem_wait(sem, 0); + TCPIP_MSG_VAR_FREE(msg); + return ERR_OK; +#endif /* LWIP_TCPIP_CORE_LOCKING */ +} + +/** + * Synchronously calls function in TCPIP thread and waits for its completion. + * It is recommended to use LWIP_TCPIP_CORE_LOCKING (preferred) or + * LWIP_NETCONN_SEM_PER_THREAD. + * If not, a semaphore is created and destroyed on every call which is usually + * an expensive/slow operation. + * @param fn Function to call + * @param call Call parameters + * @return Return value from tcpip_api_call_fn + */ +err_t +tcpip_api_call(tcpip_api_call_fn fn, struct tcpip_api_call_data *call) +{ +#if LWIP_TCPIP_CORE_LOCKING + err_t err; + LOCK_TCPIP_CORE(); + err = fn(call); + UNLOCK_TCPIP_CORE(); + return err; +#else /* LWIP_TCPIP_CORE_LOCKING */ + TCPIP_MSG_VAR_DECLARE(msg); + +#if !LWIP_NETCONN_SEM_PER_THREAD + err_t err = sys_sem_new(&call->sem, 0); + if (err != ERR_OK) { + return err; + } +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + + LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(mbox)); + + TCPIP_MSG_VAR_ALLOC(msg); + TCPIP_MSG_VAR_REF(msg).type = TCPIP_MSG_API_CALL; + TCPIP_MSG_VAR_REF(msg).msg.api_call.arg = call; + TCPIP_MSG_VAR_REF(msg).msg.api_call.function = fn; +#if LWIP_NETCONN_SEM_PER_THREAD + TCPIP_MSG_VAR_REF(msg).msg.api_call.sem = LWIP_NETCONN_THREAD_SEM_GET(); +#else /* LWIP_NETCONN_SEM_PER_THREAD */ + TCPIP_MSG_VAR_REF(msg).msg.api_call.sem = &call->sem; +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + sys_mbox_post(&mbox, &TCPIP_MSG_VAR_REF(msg)); + sys_arch_sem_wait(TCPIP_MSG_VAR_REF(msg).msg.api_call.sem, 0); + TCPIP_MSG_VAR_FREE(msg); + +#if !LWIP_NETCONN_SEM_PER_THREAD + sys_sem_free(&call->sem); +#endif /* LWIP_NETCONN_SEM_PER_THREAD */ + + return call->err; +#endif /* LWIP_TCPIP_CORE_LOCKING */ +} + +/** + * Allocate a structure for a static callback message and initialize it. + * This is intended to be used to send "static" messages from interrupt context. + * + * @param function the function to call + * @param ctx parameter passed to function + * @return a struct pointer to pass to tcpip_trycallback(). + */ +struct tcpip_callback_msg* +tcpip_callbackmsg_new(tcpip_callback_fn function, void *ctx) +{ + struct tcpip_msg *msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API); + if (msg == NULL) { + return NULL; + } + msg->type = TCPIP_MSG_CALLBACK_STATIC; + msg->msg.cb.function = function; + msg->msg.cb.ctx = ctx; + return (struct tcpip_callback_msg*)msg; +} + +/** + * Free a callback message allocated by tcpip_callbackmsg_new(). + * + * @param msg the message to free + */ +void +tcpip_callbackmsg_delete(struct tcpip_callback_msg* msg) +{ + memp_free(MEMP_TCPIP_MSG_API, msg); +} + +/** + * Try to post a callback-message to the tcpip_thread mbox + * This is intended to be used to send "static" messages from interrupt context. + * + * @param msg pointer to the message to post + * @return sys_mbox_trypost() return code + */ +err_t +tcpip_trycallback(struct tcpip_callback_msg* msg) +{ + LWIP_ASSERT("Invalid mbox", sys_mbox_valid_val(mbox)); + return sys_mbox_trypost(&mbox, msg); +} + +/** + * @ingroup lwip_os + * Initialize this module: + * - initialize all sub modules + * - start the tcpip_thread + * + * @param initfunc a function to call when tcpip_thread is running and finished initializing + * @param arg argument to pass to initfunc + */ +void +tcpip_init(tcpip_init_done_fn initfunc, void *arg) +{ + lwip_init(); + + tcpip_init_done = initfunc; + tcpip_init_done_arg = arg; + if (sys_mbox_new(&mbox, TCPIP_MBOX_SIZE) != ERR_OK) { + LWIP_ASSERT("failed to create tcpip_thread mbox", 0); + } +#if LWIP_TCPIP_CORE_LOCKING + if (sys_mutex_new(&lock_tcpip_core) != ERR_OK) { + LWIP_ASSERT("failed to create lock_tcpip_core", 0); + } +#endif /* LWIP_TCPIP_CORE_LOCKING */ + + sys_thread_new(TCPIP_THREAD_NAME, tcpip_thread, NULL, TCPIP_THREAD_STACKSIZE, TCPIP_THREAD_PRIO); +} + +/** + * Simple callback function used with tcpip_callback to free a pbuf + * (pbuf_free has a wrong signature for tcpip_callback) + * + * @param p The pbuf (chain) to be dereferenced. + */ +static void +pbuf_free_int(void *p) +{ + struct pbuf *q = (struct pbuf *)p; + pbuf_free(q); +} + +/** + * A simple wrapper function that allows you to free a pbuf from interrupt context. + * + * @param p The pbuf (chain) to be dereferenced. + * @return ERR_OK if callback could be enqueued, an err_t if not + */ +err_t +pbuf_free_callback(struct pbuf *p) +{ + return tcpip_callback_with_block(pbuf_free_int, p, 0); +} + +/** + * A simple wrapper function that allows you to free heap memory from + * interrupt context. + * + * @param m the heap memory to free + * @return ERR_OK if callback could be enqueued, an err_t if not + */ +err_t +mem_free_callback(void *m) +{ + return tcpip_callback_with_block(mem_free, m, 0); +} + +#endif /* !NO_SYS */ |