808 lines
20 KiB
C
808 lines
20 KiB
C
/*
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* Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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* Author: Adam Dunkels <adam@sics.se>
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*
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*/
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#include "lwip/opt.h"
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#include "lwip/arch.h"
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#include "lwip/api_msg.h"
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#include "lwip/memp.h"
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#include "lwip/sys.h"
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#include "lwip/tcpip.h"
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#if LWIP_RAW
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static u8_t
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recv_raw(void *arg, struct raw_pcb *pcb, struct pbuf *p,
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struct ip_addr *addr)
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{
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struct netbuf *buf;
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struct netconn *conn;
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conn = arg;
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if (!conn) return 0;
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if (conn->recvmbox != SYS_MBOX_NULL) {
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if (!(buf = memp_malloc(MEMP_NETBUF))) {
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return 0;
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}
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pbuf_ref(p);
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buf->p = p;
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buf->ptr = p;
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buf->fromaddr = addr;
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buf->fromport = pcb->protocol;
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conn->recv_avail += p->tot_len;
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/* Register event with callback */
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if (conn->callback)
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(*conn->callback)(conn, NETCONN_EVT_RCVPLUS, p->tot_len);
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sys_mbox_post(conn->recvmbox, buf);
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}
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return 0; /* do not eat the packet */
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}
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#endif
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#if LWIP_UDP
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static void
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recv_udp(void *arg, struct udp_pcb *pcb, struct pbuf *p,
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struct ip_addr *addr, u16_t port)
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{
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struct netbuf *buf;
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struct netconn *conn;
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conn = arg;
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if (conn == NULL) {
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pbuf_free(p);
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return;
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}
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if (conn->recvmbox != SYS_MBOX_NULL) {
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buf = memp_malloc(MEMP_NETBUF);
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if (buf == NULL) {
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pbuf_free(p);
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return;
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} else {
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buf->p = p;
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buf->ptr = p;
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buf->fromaddr = addr;
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buf->fromport = port;
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}
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conn->recv_avail += p->tot_len;
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/* Register event with callback */
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if (conn->callback)
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(*conn->callback)(conn, NETCONN_EVT_RCVPLUS, p->tot_len);
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sys_mbox_post(conn->recvmbox, buf);
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}
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}
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#endif /* LWIP_UDP */
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#if LWIP_TCP
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static err_t
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recv_tcp(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
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{
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struct netconn *conn;
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u16_t len;
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conn = arg;
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if (conn == NULL) {
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pbuf_free(p);
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return ERR_VAL;
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}
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if (conn->recvmbox != SYS_MBOX_NULL) {
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conn->err = err;
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if (p != NULL) {
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len = p->tot_len;
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conn->recv_avail += len;
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}
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else
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len = 0;
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/* Register event with callback */
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if (conn->callback)
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(*conn->callback)(conn, NETCONN_EVT_RCVPLUS, len);
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sys_mbox_post(conn->recvmbox, p);
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}
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return ERR_OK;
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}
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static err_t
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poll_tcp(void *arg, struct tcp_pcb *pcb)
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{
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struct netconn *conn;
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conn = arg;
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if (conn != NULL &&
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(conn->state == NETCONN_WRITE || conn->state == NETCONN_CLOSE) &&
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conn->sem != SYS_SEM_NULL) {
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sys_sem_signal(conn->sem);
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}
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return ERR_OK;
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}
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static err_t
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sent_tcp(void *arg, struct tcp_pcb *pcb, u16_t len)
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{
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struct netconn *conn;
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conn = arg;
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if (conn != NULL && conn->sem != SYS_SEM_NULL) {
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sys_sem_signal(conn->sem);
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}
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if (conn && conn->callback)
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if (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT)
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(*conn->callback)(conn, NETCONN_EVT_SENDPLUS, len);
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return ERR_OK;
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}
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static void
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err_tcp(void *arg, err_t err)
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{
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struct netconn *conn;
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conn = arg;
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conn->pcb.tcp = NULL;
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conn->err = err;
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if (conn->recvmbox != SYS_MBOX_NULL) {
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/* Register event with callback */
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if (conn->callback)
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(*conn->callback)(conn, NETCONN_EVT_RCVPLUS, 0);
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sys_mbox_post(conn->recvmbox, NULL);
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}
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if (conn->mbox != SYS_MBOX_NULL) {
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sys_mbox_post(conn->mbox, NULL);
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}
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if (conn->acceptmbox != SYS_MBOX_NULL) {
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/* Register event with callback */
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if (conn->callback)
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(*conn->callback)(conn, NETCONN_EVT_RCVPLUS, 0);
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sys_mbox_post(conn->acceptmbox, NULL);
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}
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if (conn->sem != SYS_SEM_NULL) {
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sys_sem_signal(conn->sem);
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}
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}
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static void
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setup_tcp(struct netconn *conn)
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{
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struct tcp_pcb *pcb;
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pcb = conn->pcb.tcp;
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tcp_arg(pcb, conn);
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tcp_recv(pcb, recv_tcp);
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tcp_sent(pcb, sent_tcp);
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tcp_poll(pcb, poll_tcp, 4);
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tcp_err(pcb, err_tcp);
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}
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static err_t
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accept_function(void *arg, struct tcp_pcb *newpcb, err_t err)
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{
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sys_mbox_t mbox;
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struct netconn *newconn;
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struct netconn *conn;
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#if API_MSG_DEBUG
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#if TCP_DEBUG
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tcp_debug_print_state(newpcb->state);
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#endif /* TCP_DEBUG */
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#endif /* API_MSG_DEBUG */
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conn = (struct netconn *)arg;
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mbox = conn->acceptmbox;
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newconn = memp_malloc(MEMP_NETCONN);
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if (newconn == NULL) {
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return ERR_MEM;
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}
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newconn->recvmbox = sys_mbox_new();
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if (newconn->recvmbox == SYS_MBOX_NULL) {
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memp_free(MEMP_NETCONN, newconn);
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return ERR_MEM;
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}
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newconn->mbox = sys_mbox_new();
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if (newconn->mbox == SYS_MBOX_NULL) {
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sys_mbox_free(newconn->recvmbox);
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memp_free(MEMP_NETCONN, newconn);
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return ERR_MEM;
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}
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newconn->sem = sys_sem_new(0);
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if (newconn->sem == SYS_SEM_NULL) {
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sys_mbox_free(newconn->recvmbox);
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sys_mbox_free(newconn->mbox);
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memp_free(MEMP_NETCONN, newconn);
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return ERR_MEM;
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}
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/* Allocations were OK, setup the PCB etc */
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newconn->type = NETCONN_TCP;
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newconn->pcb.tcp = newpcb;
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setup_tcp(newconn);
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newconn->acceptmbox = SYS_MBOX_NULL;
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newconn->err = err;
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/* Register event with callback */
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if (conn->callback)
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{
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(*conn->callback)(conn, NETCONN_EVT_RCVPLUS, 0);
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}
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/* We have to set the callback here even though
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* the new socket is unknown. Mark the socket as -1. */
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newconn->callback = conn->callback;
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newconn->socket = -1;
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newconn->recv_avail = 0;
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sys_mbox_post(mbox, newconn);
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return ERR_OK;
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}
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#endif /* LWIP_TCP */
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static void
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do_newconn(struct api_msg_msg *msg)
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{
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if(msg->conn->pcb.tcp != NULL) {
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/* This "new" connection already has a PCB allocated. */
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/* Is this an error condition? Should it be deleted?
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We currently just are happy and return. */
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sys_mbox_post(msg->conn->mbox, NULL);
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return;
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}
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msg->conn->err = ERR_OK;
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/* Allocate a PCB for this connection */
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switch(msg->conn->type) {
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#if LWIP_RAW
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case NETCONN_RAW:
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msg->conn->pcb.raw = raw_new(msg->msg.bc.port); /* misusing the port field */
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raw_recv(msg->conn->pcb.raw, recv_raw, msg->conn);
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break;
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#endif
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#if LWIP_UDP
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case NETCONN_UDPLITE:
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msg->conn->pcb.udp = udp_new();
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if(msg->conn->pcb.udp == NULL) {
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msg->conn->err = ERR_MEM;
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break;
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}
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udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_UDPLITE);
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udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
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break;
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case NETCONN_UDPNOCHKSUM:
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msg->conn->pcb.udp = udp_new();
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if(msg->conn->pcb.udp == NULL) {
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msg->conn->err = ERR_MEM;
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break;
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}
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udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_NOCHKSUM);
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udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
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break;
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case NETCONN_UDP:
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msg->conn->pcb.udp = udp_new();
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if(msg->conn->pcb.udp == NULL) {
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msg->conn->err = ERR_MEM;
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break;
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}
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udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
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break;
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#endif /* LWIP_UDP */
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#if LWIP_TCP
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case NETCONN_TCP:
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msg->conn->pcb.tcp = tcp_new();
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if(msg->conn->pcb.tcp == NULL) {
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msg->conn->err = ERR_MEM;
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break;
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}
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setup_tcp(msg->conn);
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break;
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#endif
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}
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sys_mbox_post(msg->conn->mbox, NULL);
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}
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static void
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do_delconn(struct api_msg_msg *msg)
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{
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if (msg->conn->pcb.tcp != NULL) {
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switch (msg->conn->type) {
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#if LWIP_RAW
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case NETCONN_RAW:
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raw_remove(msg->conn->pcb.raw);
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break;
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#endif
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#if LWIP_UDP
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case NETCONN_UDPLITE:
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/* FALLTHROUGH */
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case NETCONN_UDPNOCHKSUM:
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/* FALLTHROUGH */
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case NETCONN_UDP:
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msg->conn->pcb.udp->recv_arg = NULL;
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udp_remove(msg->conn->pcb.udp);
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break;
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#endif /* LWIP_UDP */
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#if LWIP_TCP
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case NETCONN_TCP:
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if (msg->conn->pcb.tcp->state == LISTEN) {
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tcp_arg(msg->conn->pcb.tcp, NULL);
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tcp_accept(msg->conn->pcb.tcp, NULL);
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tcp_close(msg->conn->pcb.tcp);
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} else {
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tcp_arg(msg->conn->pcb.tcp, NULL);
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tcp_sent(msg->conn->pcb.tcp, NULL);
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tcp_recv(msg->conn->pcb.tcp, NULL);
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tcp_poll(msg->conn->pcb.tcp, NULL, 0);
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tcp_err(msg->conn->pcb.tcp, NULL);
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if (tcp_close(msg->conn->pcb.tcp) != ERR_OK) {
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tcp_abort(msg->conn->pcb.tcp);
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}
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}
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#endif
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default:
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break;
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}
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}
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/* Trigger select() in socket layer */
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if (msg->conn->callback)
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{
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(*msg->conn->callback)(msg->conn, NETCONN_EVT_RCVPLUS, 0);
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(*msg->conn->callback)(msg->conn, NETCONN_EVT_SENDPLUS, 0);
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}
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if (msg->conn->mbox != SYS_MBOX_NULL) {
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sys_mbox_post(msg->conn->mbox, NULL);
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}
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}
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static void
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do_bind(struct api_msg_msg *msg)
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{
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if (msg->conn->pcb.tcp == NULL) {
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switch (msg->conn->type) {
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#if LWIP_RAW
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case NETCONN_RAW:
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msg->conn->pcb.raw = raw_new(msg->msg.bc.port); /* misusing the port field as protocol */
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raw_recv(msg->conn->pcb.raw, recv_raw, msg->conn);
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break;
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#endif
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#if LWIP_UDP
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case NETCONN_UDPLITE:
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msg->conn->pcb.udp = udp_new();
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udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_UDPLITE);
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udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
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break;
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case NETCONN_UDPNOCHKSUM:
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msg->conn->pcb.udp = udp_new();
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udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_NOCHKSUM);
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udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
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break;
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case NETCONN_UDP:
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msg->conn->pcb.udp = udp_new();
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udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
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break;
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#endif /* LWIP_UDP */
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#if LWIP_TCP
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case NETCONN_TCP:
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msg->conn->pcb.tcp = tcp_new();
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setup_tcp(msg->conn);
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#endif /* LWIP_TCP */
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default:
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break;
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}
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}
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switch (msg->conn->type) {
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#if LWIP_RAW
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case NETCONN_RAW:
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msg->conn->err = raw_bind(msg->conn->pcb.raw,msg->msg.bc.ipaddr);
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break;
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#endif
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#if LWIP_UDP
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case NETCONN_UDPLITE:
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/* FALLTHROUGH */
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case NETCONN_UDPNOCHKSUM:
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/* FALLTHROUGH */
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case NETCONN_UDP:
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msg->conn->err = udp_bind(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port);
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break;
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#endif /* LWIP_UDP */
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#if LWIP_TCP
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case NETCONN_TCP:
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msg->conn->err = tcp_bind(msg->conn->pcb.tcp,
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msg->msg.bc.ipaddr, msg->msg.bc.port);
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#endif /* LWIP_TCP */
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default:
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break;
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}
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sys_mbox_post(msg->conn->mbox, NULL);
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}
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#if LWIP_TCP
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static err_t
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do_connected(void *arg, struct tcp_pcb *pcb, err_t err)
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{
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struct netconn *conn;
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conn = arg;
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if (conn == NULL) {
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return ERR_VAL;
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}
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conn->err = err;
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if (conn->type == NETCONN_TCP && err == ERR_OK) {
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setup_tcp(conn);
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}
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sys_mbox_post(conn->mbox, NULL);
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return ERR_OK;
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}
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#endif
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static void
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do_connect(struct api_msg_msg *msg)
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{
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if (msg->conn->pcb.tcp == NULL) {
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switch (msg->conn->type) {
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#if LWIP_RAW
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case NETCONN_RAW:
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msg->conn->pcb.raw = raw_new(msg->msg.bc.port); /* misusing the port field as protocol */
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raw_recv(msg->conn->pcb.raw, recv_raw, msg->conn);
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break;
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#endif
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#if LWIP_UDP
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case NETCONN_UDPLITE:
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msg->conn->pcb.udp = udp_new();
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if (msg->conn->pcb.udp == NULL) {
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msg->conn->err = ERR_MEM;
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sys_mbox_post(msg->conn->mbox, NULL);
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return;
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}
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udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_UDPLITE);
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udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
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break;
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case NETCONN_UDPNOCHKSUM:
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msg->conn->pcb.udp = udp_new();
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if (msg->conn->pcb.udp == NULL) {
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msg->conn->err = ERR_MEM;
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sys_mbox_post(msg->conn->mbox, NULL);
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return;
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}
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udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_NOCHKSUM);
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udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
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break;
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case NETCONN_UDP:
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msg->conn->pcb.udp = udp_new();
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if (msg->conn->pcb.udp == NULL) {
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msg->conn->err = ERR_MEM;
|
|
sys_mbox_post(msg->conn->mbox, NULL);
|
|
return;
|
|
}
|
|
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();
|
|
if (msg->conn->pcb.tcp == NULL) {
|
|
msg->conn->err = ERR_MEM;
|
|
sys_mbox_post(msg->conn->mbox, NULL);
|
|
return;
|
|
}
|
|
#endif
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
switch (msg->conn->type) {
|
|
#if LWIP_RAW
|
|
case NETCONN_RAW:
|
|
raw_connect(msg->conn->pcb.raw, msg->msg.bc.ipaddr);
|
|
sys_mbox_post(msg->conn->mbox, NULL);
|
|
break;
|
|
#endif
|
|
#if LWIP_UDP
|
|
case NETCONN_UDPLITE:
|
|
/* FALLTHROUGH */
|
|
case NETCONN_UDPNOCHKSUM:
|
|
/* FALLTHROUGH */
|
|
case NETCONN_UDP:
|
|
udp_connect(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port);
|
|
sys_mbox_post(msg->conn->mbox, NULL);
|
|
break;
|
|
#endif
|
|
#if LWIP_TCP
|
|
case NETCONN_TCP:
|
|
/* tcp_arg(msg->conn->pcb.tcp, msg->conn);*/
|
|
setup_tcp(msg->conn);
|
|
tcp_connect(msg->conn->pcb.tcp, msg->msg.bc.ipaddr, msg->msg.bc.port,
|
|
do_connected);
|
|
/*tcp_output(msg->conn->pcb.tcp);*/
|
|
#endif
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
do_disconnect(struct api_msg_msg *msg)
|
|
{
|
|
|
|
switch (msg->conn->type) {
|
|
#if LWIP_RAW
|
|
case NETCONN_RAW:
|
|
/* Do nothing as connecting is only a helper for upper lwip layers */
|
|
break;
|
|
#endif
|
|
#if LWIP_UDP
|
|
case NETCONN_UDPLITE:
|
|
/* FALLTHROUGH */
|
|
case NETCONN_UDPNOCHKSUM:
|
|
/* FALLTHROUGH */
|
|
case NETCONN_UDP:
|
|
udp_disconnect(msg->conn->pcb.udp);
|
|
break;
|
|
#endif
|
|
case NETCONN_TCP:
|
|
break;
|
|
}
|
|
sys_mbox_post(msg->conn->mbox, NULL);
|
|
}
|
|
|
|
|
|
static void
|
|
do_listen(struct api_msg_msg *msg)
|
|
{
|
|
if (msg->conn->pcb.tcp != NULL) {
|
|
switch (msg->conn->type) {
|
|
#if LWIP_RAW
|
|
case NETCONN_RAW:
|
|
LWIP_DEBUGF(API_MSG_DEBUG, ("api_msg: listen RAW: cannot listen for RAW.\n"));
|
|
break;
|
|
#endif
|
|
#if LWIP_UDP
|
|
case NETCONN_UDPLITE:
|
|
/* FALLTHROUGH */
|
|
case NETCONN_UDPNOCHKSUM:
|
|
/* FALLTHROUGH */
|
|
case NETCONN_UDP:
|
|
LWIP_DEBUGF(API_MSG_DEBUG, ("api_msg: listen UDP: cannot listen for UDP.\n"));
|
|
break;
|
|
#endif /* LWIP_UDP */
|
|
#if LWIP_TCP
|
|
case NETCONN_TCP:
|
|
msg->conn->pcb.tcp = tcp_listen(msg->conn->pcb.tcp);
|
|
if (msg->conn->pcb.tcp == NULL) {
|
|
msg->conn->err = ERR_MEM;
|
|
} else {
|
|
if (msg->conn->acceptmbox == SYS_MBOX_NULL) {
|
|
msg->conn->acceptmbox = sys_mbox_new();
|
|
if (msg->conn->acceptmbox == SYS_MBOX_NULL) {
|
|
msg->conn->err = ERR_MEM;
|
|
break;
|
|
}
|
|
}
|
|
tcp_arg(msg->conn->pcb.tcp, msg->conn);
|
|
tcp_accept(msg->conn->pcb.tcp, accept_function);
|
|
}
|
|
#endif
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
sys_mbox_post(msg->conn->mbox, NULL);
|
|
}
|
|
|
|
static void
|
|
do_accept(struct api_msg_msg *msg)
|
|
{
|
|
if (msg->conn->pcb.tcp != NULL) {
|
|
switch (msg->conn->type) {
|
|
#if LWIP_RAW
|
|
case NETCONN_RAW:
|
|
LWIP_DEBUGF(API_MSG_DEBUG, ("api_msg: accept RAW: cannot accept for RAW.\n"));
|
|
break;
|
|
#endif
|
|
#if LWIP_UDP
|
|
case NETCONN_UDPLITE:
|
|
/* FALLTHROUGH */
|
|
case NETCONN_UDPNOCHKSUM:
|
|
/* FALLTHROUGH */
|
|
case NETCONN_UDP:
|
|
LWIP_DEBUGF(API_MSG_DEBUG, ("api_msg: accept UDP: cannot accept for UDP.\n"));
|
|
break;
|
|
#endif /* LWIP_UDP */
|
|
case NETCONN_TCP:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
do_send(struct api_msg_msg *msg)
|
|
{
|
|
if (msg->conn->pcb.tcp != NULL) {
|
|
switch (msg->conn->type) {
|
|
#if LWIP_RAW
|
|
case NETCONN_RAW:
|
|
raw_send(msg->conn->pcb.raw, msg->msg.p);
|
|
break;
|
|
#endif
|
|
#if LWIP_UDP
|
|
case NETCONN_UDPLITE:
|
|
/* FALLTHROUGH */
|
|
case NETCONN_UDPNOCHKSUM:
|
|
/* FALLTHROUGH */
|
|
case NETCONN_UDP:
|
|
udp_send(msg->conn->pcb.udp, msg->msg.p);
|
|
break;
|
|
#endif /* LWIP_UDP */
|
|
case NETCONN_TCP:
|
|
break;
|
|
}
|
|
}
|
|
sys_mbox_post(msg->conn->mbox, NULL);
|
|
}
|
|
|
|
static void
|
|
do_recv(struct api_msg_msg *msg)
|
|
{
|
|
#if LWIP_TCP
|
|
if (msg->conn->pcb.tcp != NULL) {
|
|
if (msg->conn->type == NETCONN_TCP) {
|
|
tcp_recved(msg->conn->pcb.tcp, msg->msg.len);
|
|
}
|
|
}
|
|
#endif
|
|
sys_mbox_post(msg->conn->mbox, NULL);
|
|
}
|
|
|
|
static void
|
|
do_write(struct api_msg_msg *msg)
|
|
{
|
|
#if LWIP_TCP
|
|
err_t err;
|
|
#endif
|
|
if (msg->conn->pcb.tcp != NULL) {
|
|
switch (msg->conn->type) {
|
|
#if LWIP_RAW
|
|
case NETCONN_RAW:
|
|
msg->conn->err = ERR_VAL;
|
|
break;
|
|
#endif
|
|
#if LWIP_UDP
|
|
case NETCONN_UDPLITE:
|
|
/* FALLTHROUGH */
|
|
case NETCONN_UDPNOCHKSUM:
|
|
/* FALLTHROUGH */
|
|
case NETCONN_UDP:
|
|
msg->conn->err = ERR_VAL;
|
|
break;
|
|
#endif /* LWIP_UDP */
|
|
#if LWIP_TCP
|
|
case NETCONN_TCP:
|
|
err = tcp_write(msg->conn->pcb.tcp, msg->msg.w.dataptr,
|
|
msg->msg.w.len, msg->msg.w.copy);
|
|
/* This is the Nagle algorithm: inhibit the sending of new TCP
|
|
segments when new outgoing data arrives from the user if any
|
|
previously transmitted data on the connection remains
|
|
unacknowledged. */
|
|
if(err == ERR_OK && (msg->conn->pcb.tcp->unacked == NULL ||
|
|
(msg->conn->pcb.tcp->flags & TF_NODELAY) ||
|
|
(msg->conn->pcb.tcp->snd_queuelen) > 1)) {
|
|
tcp_output(msg->conn->pcb.tcp);
|
|
}
|
|
msg->conn->err = err;
|
|
if (msg->conn->callback)
|
|
if (err == ERR_OK)
|
|
{
|
|
if (tcp_sndbuf(msg->conn->pcb.tcp) <= TCP_SNDLOWAT)
|
|
(*msg->conn->callback)(msg->conn, NETCONN_EVT_SENDMINUS, msg->msg.w.len);
|
|
}
|
|
#endif
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
sys_mbox_post(msg->conn->mbox, NULL);
|
|
}
|
|
|
|
static void
|
|
do_close(struct api_msg_msg *msg)
|
|
{
|
|
err_t err;
|
|
|
|
err = ERR_OK;
|
|
|
|
if (msg->conn->pcb.tcp != NULL) {
|
|
switch (msg->conn->type) {
|
|
#if LWIP_RAW
|
|
case NETCONN_RAW:
|
|
break;
|
|
#endif
|
|
#if LWIP_UDP
|
|
case NETCONN_UDPLITE:
|
|
/* FALLTHROUGH */
|
|
case NETCONN_UDPNOCHKSUM:
|
|
/* FALLTHROUGH */
|
|
case NETCONN_UDP:
|
|
break;
|
|
#endif /* LWIP_UDP */
|
|
#if LWIP_TCP
|
|
case NETCONN_TCP:
|
|
if (msg->conn->pcb.tcp->state == LISTEN) {
|
|
err = tcp_close(msg->conn->pcb.tcp);
|
|
}
|
|
else if (msg->conn->pcb.tcp->state == CLOSE_WAIT) {
|
|
err = tcp_output(msg->conn->pcb.tcp);
|
|
}
|
|
msg->conn->err = err;
|
|
#endif
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
sys_mbox_post(msg->conn->mbox, NULL);
|
|
}
|
|
|
|
typedef void (* api_msg_decode)(struct api_msg_msg *msg);
|
|
static api_msg_decode decode[API_MSG_MAX] = {
|
|
do_newconn,
|
|
do_delconn,
|
|
do_bind,
|
|
do_connect,
|
|
do_disconnect,
|
|
do_listen,
|
|
do_accept,
|
|
do_send,
|
|
do_recv,
|
|
do_write,
|
|
do_close
|
|
};
|
|
void
|
|
api_msg_input(struct api_msg *msg)
|
|
{
|
|
decode[msg->type](&(msg->msg));
|
|
}
|
|
|
|
void
|
|
api_msg_post(struct api_msg *msg)
|
|
{
|
|
tcpip_apimsg(msg);
|
|
}
|
|
|
|
|
|
|