mirror of
https://github.com/lwip-tcpip/lwip.git
synced 2024-11-17 17:10:03 +00:00
548 lines
14 KiB
C
548 lines
14 KiB
C
/*
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* Copyright (c) 2001-2003 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/debug.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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/*-----------------------------------------------------------------------------------*/
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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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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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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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/*-----------------------------------------------------------------------------------*/
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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_mallocp(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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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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/*-----------------------------------------------------------------------------------*/
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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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/*-----------------------------------------------------------------------------------*/
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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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return ERR_OK;
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}
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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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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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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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/*-----------------------------------------------------------------------------------*/
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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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/*-----------------------------------------------------------------------------------*/
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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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#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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mbox = (sys_mbox_t *)arg;
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newconn = memp_mallocp(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->type = NETCONN_TCP;
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newconn->pcb.tcp = newpcb;
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setup_tcp(newconn);
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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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newconn->acceptmbox = SYS_MBOX_NULL;
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newconn->err = err;
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sys_mbox_post(*mbox, newconn);
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return ERR_OK;
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}
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/*-----------------------------------------------------------------------------------*/
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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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}
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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_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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case NETCONN_TCP:
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if(msg->conn->pcb.tcp->state == LISTEN) {
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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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break;
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}
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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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/*-----------------------------------------------------------------------------------*/
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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_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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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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break;
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}
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}
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switch(msg->conn->type) {
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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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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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break;
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}
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sys_mbox_post(msg->conn->mbox, NULL);
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}
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/*-----------------------------------------------------------------------------------*/
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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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/*-----------------------------------------------------------------------------------*/
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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_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;
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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_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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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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sys_mbox_post(msg->conn->mbox, NULL);
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return;
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}
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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_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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udp_connect(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port);
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sys_mbox_post(msg->conn->mbox, NULL);
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break;
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#endif
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case NETCONN_TCP:
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/* tcp_arg(msg->conn->pcb.tcp, msg->conn);*/
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setup_tcp(msg->conn);
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tcp_connect(msg->conn->pcb.tcp, msg->msg.bc.ipaddr, msg->msg.bc.port,
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do_connected);
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/*tcp_output(msg->conn->pcb.tcp);*/
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break;
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}
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}
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/*-----------------------------------------------------------------------------------*/
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static void
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do_listen(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_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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DEBUGF(API_MSG_DEBUG, ("api_msg: listen UDP: cannot listen for UDP.\n"));
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break;
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#endif /* LWIP_UDP */
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case NETCONN_TCP:
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msg->conn->pcb.tcp = tcp_listen(msg->conn->pcb.tcp);
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if(msg->conn->pcb.tcp == NULL) {
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msg->conn->err = ERR_MEM;
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} else {
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if(msg->conn->acceptmbox == SYS_MBOX_NULL) {
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msg->conn->acceptmbox = sys_mbox_new();
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if(msg->conn->acceptmbox == SYS_MBOX_NULL) {
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msg->conn->err = ERR_MEM;
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break;
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}
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}
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tcp_arg(msg->conn->pcb.tcp, (void *)&(msg->conn->acceptmbox));
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tcp_accept(msg->conn->pcb.tcp, accept_function);
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}
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break;
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}
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}
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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_accept(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_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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DEBUGF(API_MSG_DEBUG, ("api_msg: accept UDP: cannot accept for UDP.\n"));
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break;
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#endif /* LWIP_UDP */
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case NETCONN_TCP:
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break;
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}
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}
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}
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/*-----------------------------------------------------------------------------------*/
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static void
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do_send(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_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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udp_send(msg->conn->pcb.udp, msg->msg.p);
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break;
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#endif /* LWIP_UDP */
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case NETCONN_TCP:
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break;
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}
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}
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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_recv(struct api_msg_msg *msg)
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{
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if(msg->conn->pcb.tcp != NULL) {
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if(msg->conn->type == NETCONN_TCP) {
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tcp_recved(msg->conn->pcb.tcp, msg->msg.len);
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}
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}
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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_write(struct api_msg_msg *msg)
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{
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err_t err;
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if(msg->conn->pcb.tcp != NULL) {
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switch(msg->conn->type) {
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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 = ERR_VAL;
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break;
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#endif /* LWIP_UDP */
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case NETCONN_TCP:
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err = tcp_write(msg->conn->pcb.tcp, msg->msg.w.dataptr,
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msg->msg.w.len, msg->msg.w.copy);
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/* This is the Nagle algorithm: inhibit the sending of new TCP
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segments when new outgoing data arrives from the user if any
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previously transmitted data on the connection remains
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unacknowledged. */
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if(err == ERR_OK && msg->conn->pcb.tcp->unacked == NULL) {
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tcp_output(msg->conn->pcb.tcp);
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}
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msg->conn->err = err;
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break;
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}
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}
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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_close(struct api_msg_msg *msg)
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{
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err_t err;
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err = ERR_OK;
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if(msg->conn->pcb.tcp != NULL) {
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switch(msg->conn->type) {
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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:
|
|
/* FALLTHROUGH */
|
|
case NETCONN_UDP:
|
|
break;
|
|
#endif /* LWIP_UDP */
|
|
case NETCONN_TCP:
|
|
if(msg->conn->pcb.tcp->state == LISTEN) {
|
|
err = tcp_close(msg->conn->pcb.tcp);
|
|
}
|
|
msg->conn->err = err;
|
|
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_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);
|
|
}
|
|
/*-----------------------------------------------------------------------------------*/
|
|
|
|
|