3 * Sequential API Internal module
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8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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9 * All rights reserved.
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11 * Redistribution and use in source and binary forms, with or without modification,
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12 * are permitted provided that the following conditions are met:
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14 * 1. Redistributions of source code must retain the above copyright notice,
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15 * this list of conditions and the following disclaimer.
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16 * 2. Redistributions in binary form must reproduce the above copyright notice,
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17 * this list of conditions and the following disclaimer in the documentation
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18 * and/or other materials provided with the distribution.
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19 * 3. The name of the author may not be used to endorse or promote products
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20 * derived from this software without specific prior written permission.
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22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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27 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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33 * This file is part of the lwIP TCP/IP stack.
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35 * Author: Adam Dunkels <adam@sics.se>
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39 #include "lwip/opt.h"
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41 #if LWIP_NETCONN /* don't build if not configured for use in lwipopts.h */
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43 #include "lwip/api_msg.h"
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45 #include "lwip/ip.h"
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46 #include "lwip/udp.h"
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47 #include "lwip/tcp.h"
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48 #include "lwip/raw.h"
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50 #include "lwip/memp.h"
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51 #include "lwip/tcpip.h"
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52 #include "lwip/igmp.h"
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53 #include "lwip/dns.h"
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55 /* forward declarations */
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57 static err_t do_writemore(struct netconn *conn);
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58 static void do_close_internal(struct netconn *conn);
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63 * Receive callback function for RAW netconns.
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64 * Doesn't 'eat' the packet, only references it and sends it to
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67 * @see raw.h (struct raw_pcb.recv) for parameters and return value
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70 recv_raw(void *arg, struct raw_pcb *pcb, struct pbuf *p,
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71 struct ip_addr *addr)
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75 struct netconn *conn;
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78 #endif /* LWIP_SO_RCVBUF */
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80 LWIP_UNUSED_ARG(addr);
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84 SYS_ARCH_GET(conn->recv_avail, recv_avail);
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85 if ((conn != NULL) && (conn->recvmbox != SYS_MBOX_NULL) &&
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86 ((recv_avail + (int)(p->tot_len)) <= conn->recv_bufsize)) {
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87 #else /* LWIP_SO_RCVBUF */
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88 if ((conn != NULL) && (conn->recvmbox != SYS_MBOX_NULL)) {
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89 #endif /* LWIP_SO_RCVBUF */
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90 /* copy the whole packet into new pbufs */
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91 q = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM);
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93 if (pbuf_copy(q, p) != ERR_OK) {
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100 buf = memp_malloc(MEMP_NETBUF);
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108 buf->addr = &(((struct ip_hdr*)(q->payload))->src);
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109 buf->port = pcb->protocol;
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111 SYS_ARCH_INC(conn->recv_avail, q->tot_len);
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112 /* Register event with callback */
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113 API_EVENT(conn, NETCONN_EVT_RCVPLUS, q->tot_len);
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114 if (sys_mbox_trypost(conn->recvmbox, buf) != ERR_OK) {
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115 netbuf_delete(buf);
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120 return 0; /* do not eat the packet */
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122 #endif /* LWIP_RAW*/
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126 * Receive callback function for UDP netconns.
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127 * Posts the packet to conn->recvmbox or deletes it on memory error.
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129 * @see udp.h (struct udp_pcb.recv) for parameters
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132 recv_udp(void *arg, struct udp_pcb *pcb, struct pbuf *p,
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133 struct ip_addr *addr, u16_t port)
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135 struct netbuf *buf;
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136 struct netconn *conn;
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139 #endif /* LWIP_SO_RCVBUF */
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141 LWIP_UNUSED_ARG(pcb); /* only used for asserts... */
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142 LWIP_ASSERT("recv_udp must have a pcb argument", pcb != NULL);
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143 LWIP_ASSERT("recv_udp must have an argument", arg != NULL);
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145 LWIP_ASSERT("recv_udp: recv for wrong pcb!", conn->pcb.udp == pcb);
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148 SYS_ARCH_GET(conn->recv_avail, recv_avail);
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149 if ((conn == NULL) || (conn->recvmbox == SYS_MBOX_NULL) ||
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150 ((recv_avail + (int)(p->tot_len)) > conn->recv_bufsize)) {
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151 #else /* LWIP_SO_RCVBUF */
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152 if ((conn == NULL) || (conn->recvmbox == SYS_MBOX_NULL)) {
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153 #endif /* LWIP_SO_RCVBUF */
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158 buf = memp_malloc(MEMP_NETBUF);
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169 SYS_ARCH_INC(conn->recv_avail, p->tot_len);
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170 /* Register event with callback */
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171 API_EVENT(conn, NETCONN_EVT_RCVPLUS, p->tot_len);
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172 if (sys_mbox_trypost(conn->recvmbox, buf) != ERR_OK) {
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173 netbuf_delete(buf);
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177 #endif /* LWIP_UDP */
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181 * Receive callback function for TCP netconns.
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182 * Posts the packet to conn->recvmbox, but doesn't delete it on errors.
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184 * @see tcp.h (struct tcp_pcb.recv) for parameters and return value
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187 recv_tcp(void *arg, struct tcp_pcb *pcb, struct pbuf *p, err_t err)
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189 struct netconn *conn;
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192 LWIP_UNUSED_ARG(pcb);
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193 LWIP_ASSERT("recv_tcp must have a pcb argument", pcb != NULL);
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194 LWIP_ASSERT("recv_tcp must have an argument", arg != NULL);
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196 LWIP_ASSERT("recv_tcp: recv for wrong pcb!", conn->pcb.tcp == pcb);
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198 if ((conn == NULL) || (conn->recvmbox == SYS_MBOX_NULL)) {
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205 SYS_ARCH_INC(conn->recv_avail, len);
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209 /* Register event with callback */
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210 API_EVENT(conn, NETCONN_EVT_RCVPLUS, len);
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211 if (sys_mbox_trypost(conn->recvmbox, p) != ERR_OK) {
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219 * Poll callback function for TCP netconns.
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220 * Wakes up an application thread that waits for a connection to close
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221 * or data to be sent. The application thread then takes the
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222 * appropriate action to go on.
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224 * Signals the conn->sem.
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225 * netconn_close waits for conn->sem if closing failed.
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227 * @see tcp.h (struct tcp_pcb.poll) for parameters and return value
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230 poll_tcp(void *arg, struct tcp_pcb *pcb)
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232 struct netconn *conn = arg;
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234 LWIP_UNUSED_ARG(pcb);
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235 LWIP_ASSERT("conn != NULL", (conn != NULL));
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237 if (conn->state == NETCONN_WRITE) {
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238 do_writemore(conn);
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239 } else if (conn->state == NETCONN_CLOSE) {
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240 do_close_internal(conn);
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247 * Sent callback function for TCP netconns.
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248 * Signals the conn->sem and calls API_EVENT.
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249 * netconn_write waits for conn->sem if send buffer is low.
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251 * @see tcp.h (struct tcp_pcb.sent) for parameters and return value
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254 sent_tcp(void *arg, struct tcp_pcb *pcb, u16_t len)
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256 struct netconn *conn = arg;
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258 LWIP_UNUSED_ARG(pcb);
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259 LWIP_ASSERT("conn != NULL", (conn != NULL));
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261 if (conn->state == NETCONN_WRITE) {
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262 LWIP_ASSERT("conn->pcb.tcp != NULL", conn->pcb.tcp != NULL);
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263 do_writemore(conn);
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264 } else if (conn->state == NETCONN_CLOSE) {
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265 do_close_internal(conn);
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269 if ((conn->pcb.tcp != NULL) && (tcp_sndbuf(conn->pcb.tcp) > TCP_SNDLOWAT)) {
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270 API_EVENT(conn, NETCONN_EVT_SENDPLUS, len);
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278 * Error callback function for TCP netconns.
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279 * Signals conn->sem, posts to all conn mboxes and calls API_EVENT.
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280 * The application thread has then to decide what to do.
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282 * @see tcp.h (struct tcp_pcb.err) for parameters
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285 err_tcp(void *arg, err_t err)
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287 struct netconn *conn;
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290 LWIP_ASSERT("conn != NULL", (conn != NULL));
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292 conn->pcb.tcp = NULL;
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295 if (conn->recvmbox != SYS_MBOX_NULL) {
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296 /* Register event with callback */
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297 API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
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298 sys_mbox_post(conn->recvmbox, NULL);
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300 if (conn->op_completed != SYS_SEM_NULL && conn->state == NETCONN_CONNECT) {
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301 conn->state = NETCONN_NONE;
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302 sys_sem_signal(conn->op_completed);
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304 if (conn->acceptmbox != SYS_MBOX_NULL) {
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305 /* Register event with callback */
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306 API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
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307 sys_mbox_post(conn->acceptmbox, NULL);
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309 if ((conn->state == NETCONN_WRITE) || (conn->state == NETCONN_CLOSE)) {
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310 /* calling do_writemore/do_close_internal is not necessary
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311 since the pcb has already been deleted! */
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312 conn->state = NETCONN_NONE;
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313 /* wake up the waiting task */
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314 sys_sem_signal(conn->op_completed);
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319 * Setup a tcp_pcb with the correct callback function pointers
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320 * and their arguments.
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322 * @param conn the TCP netconn to setup
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325 setup_tcp(struct netconn *conn)
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327 struct tcp_pcb *pcb;
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329 pcb = conn->pcb.tcp;
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330 tcp_arg(pcb, conn);
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331 tcp_recv(pcb, recv_tcp);
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332 tcp_sent(pcb, sent_tcp);
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333 tcp_poll(pcb, poll_tcp, 4);
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334 tcp_err(pcb, err_tcp);
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338 * Accept callback function for TCP netconns.
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339 * Allocates a new netconn and posts that to conn->acceptmbox.
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341 * @see tcp.h (struct tcp_pcb_listen.accept) for parameters and return value
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344 accept_function(void *arg, struct tcp_pcb *newpcb, err_t err)
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346 struct netconn *newconn;
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347 struct netconn *conn;
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351 tcp_debug_print_state(newpcb->state);
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352 #endif /* TCP_DEBUG */
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353 #endif /* API_MSG_DEBUG */
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354 conn = (struct netconn *)arg;
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356 LWIP_ERROR("accept_function: invalid conn->acceptmbox",
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357 conn->acceptmbox != SYS_MBOX_NULL, return ERR_VAL;);
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359 /* We have to set the callback here even though
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360 * the new socket is unknown. conn->socket is marked as -1. */
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361 newconn = netconn_alloc(conn->type, conn->callback);
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362 if (newconn == NULL) {
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365 newconn->pcb.tcp = newpcb;
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366 setup_tcp(newconn);
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367 newconn->err = err;
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368 /* Register event with callback */
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369 API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
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371 if (sys_mbox_trypost(conn->acceptmbox, newconn) != ERR_OK) {
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372 /* When returning != ERR_OK, the connection is aborted in tcp_process(),
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373 so do nothing here! */
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374 newconn->pcb.tcp = NULL;
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375 netconn_free(newconn);
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380 #endif /* LWIP_TCP */
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383 * Create a new pcb of a specific type.
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384 * Called from do_newconn().
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386 * @param msg the api_msg_msg describing the connection type
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387 * @return msg->conn->err, but the return value is currently ignored
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390 pcb_new(struct api_msg_msg *msg)
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392 msg->conn->err = ERR_OK;
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394 LWIP_ASSERT("pcb_new: pcb already allocated", msg->conn->pcb.tcp == NULL);
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396 /* Allocate a PCB for this connection */
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397 switch(NETCONNTYPE_GROUP(msg->conn->type)) {
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400 msg->conn->pcb.raw = raw_new(msg->msg.n.proto);
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401 if(msg->conn->pcb.raw == NULL) {
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402 msg->conn->err = ERR_MEM;
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405 raw_recv(msg->conn->pcb.raw, recv_raw, msg->conn);
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407 #endif /* LWIP_RAW */
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410 msg->conn->pcb.udp = udp_new();
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411 if(msg->conn->pcb.udp == NULL) {
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412 msg->conn->err = ERR_MEM;
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416 if (msg->conn->type==NETCONN_UDPLITE) {
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417 udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_UDPLITE);
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419 #endif /* LWIP_UDPLITE */
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420 if (msg->conn->type==NETCONN_UDPNOCHKSUM) {
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421 udp_setflags(msg->conn->pcb.udp, UDP_FLAGS_NOCHKSUM);
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423 udp_recv(msg->conn->pcb.udp, recv_udp, msg->conn);
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425 #endif /* LWIP_UDP */
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428 msg->conn->pcb.tcp = tcp_new();
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429 if(msg->conn->pcb.tcp == NULL) {
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430 msg->conn->err = ERR_MEM;
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433 setup_tcp(msg->conn);
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435 #endif /* LWIP_TCP */
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437 /* Unsupported netconn type, e.g. protocol disabled */
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438 msg->conn->err = ERR_VAL;
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442 return msg->conn->err;
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446 * Create a new pcb of a specific type inside a netconn.
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447 * Called from netconn_new_with_proto_and_callback.
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449 * @param msg the api_msg_msg describing the connection type
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452 do_newconn(struct api_msg_msg *msg)
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454 if(msg->conn->pcb.tcp == NULL) {
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457 /* Else? This "new" connection already has a PCB allocated. */
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458 /* Is this an error condition? Should it be deleted? */
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459 /* We currently just are happy and return. */
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461 TCPIP_APIMSG_ACK(msg);
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465 * Create a new netconn (of a specific type) that has a callback function.
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466 * The corresponding pcb is NOT created!
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468 * @param t the type of 'connection' to create (@see enum netconn_type)
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469 * @param proto the IP protocol for RAW IP pcbs
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470 * @param callback a function to call on status changes (RX available, TX'ed)
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471 * @return a newly allocated struct netconn or
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472 * NULL on memory error
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475 netconn_alloc(enum netconn_type t, netconn_callback callback)
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477 struct netconn *conn;
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480 conn = memp_malloc(MEMP_NETCONN);
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481 if (conn == NULL) {
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485 conn->err = ERR_OK;
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487 conn->pcb.tcp = NULL;
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489 #if (DEFAULT_RAW_RECVMBOX_SIZE == DEFAULT_UDP_RECVMBOX_SIZE) && \
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490 (DEFAULT_RAW_RECVMBOX_SIZE == DEFAULT_TCP_RECVMBOX_SIZE)
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491 size = DEFAULT_RAW_RECVMBOX_SIZE;
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493 switch(NETCONNTYPE_GROUP(t)) {
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496 size = DEFAULT_RAW_RECVMBOX_SIZE;
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498 #endif /* LWIP_RAW */
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501 size = DEFAULT_UDP_RECVMBOX_SIZE;
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503 #endif /* LWIP_UDP */
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506 size = DEFAULT_TCP_RECVMBOX_SIZE;
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508 #endif /* LWIP_TCP */
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510 LWIP_ASSERT("netconn_alloc: undefined netconn_type", 0);
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515 if ((conn->op_completed = sys_sem_new(0)) == SYS_SEM_NULL) {
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516 memp_free(MEMP_NETCONN, conn);
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519 if ((conn->recvmbox = sys_mbox_new(size)) == SYS_MBOX_NULL) {
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520 sys_sem_free(conn->op_completed);
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521 memp_free(MEMP_NETCONN, conn);
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525 conn->acceptmbox = SYS_MBOX_NULL;
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526 conn->state = NETCONN_NONE;
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527 /* initialize socket to -1 since 0 is a valid socket */
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529 conn->callback = callback;
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530 conn->recv_avail = 0;
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531 #if LWIP_SO_RCVTIMEO
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532 conn->recv_timeout = 0;
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533 #endif /* LWIP_SO_RCVTIMEO */
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535 conn->recv_bufsize = INT_MAX;
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536 #endif /* LWIP_SO_RCVBUF */
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541 * Delete a netconn and all its resources.
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542 * The pcb is NOT freed (since we might not be in the right thread context do this).
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544 * @param conn the netconn to free
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547 netconn_free(struct netconn *conn)
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550 LWIP_ASSERT("PCB must be deallocated outside this function", conn->pcb.tcp == NULL);
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552 /* Drain the recvmbox. */
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553 if (conn->recvmbox != SYS_MBOX_NULL) {
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554 while (sys_mbox_tryfetch(conn->recvmbox, &mem) != SYS_MBOX_EMPTY) {
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555 if (conn->type == NETCONN_TCP) {
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557 pbuf_free((struct pbuf *)mem);
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560 netbuf_delete((struct netbuf *)mem);
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563 sys_mbox_free(conn->recvmbox);
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564 conn->recvmbox = SYS_MBOX_NULL;
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567 /* Drain the acceptmbox. */
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568 if (conn->acceptmbox != SYS_MBOX_NULL) {
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569 while (sys_mbox_tryfetch(conn->acceptmbox, &mem) != SYS_MBOX_EMPTY) {
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570 netconn_delete((struct netconn *)mem);
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572 sys_mbox_free(conn->acceptmbox);
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573 conn->acceptmbox = SYS_MBOX_NULL;
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576 sys_sem_free(conn->op_completed);
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577 conn->op_completed = SYS_SEM_NULL;
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579 memp_free(MEMP_NETCONN, conn);
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584 * Internal helper function to close a TCP netconn: since this sometimes
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585 * doesn't work at the first attempt, this function is called from multiple
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588 * @param conn the TCP netconn to close
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591 do_close_internal(struct netconn *conn)
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595 LWIP_ASSERT("invalid conn", (conn != NULL));
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596 LWIP_ASSERT("this is for tcp netconns only", (conn->type == NETCONN_TCP));
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597 LWIP_ASSERT("conn must be in state NETCONN_CLOSE", (conn->state == NETCONN_CLOSE));
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598 LWIP_ASSERT("pcb already closed", (conn->pcb.tcp != NULL));
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600 /* Set back some callback pointers */
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601 if (conn->pcb.tcp->state == LISTEN) {
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602 tcp_arg(conn->pcb.tcp, NULL);
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603 tcp_accept(conn->pcb.tcp, NULL);
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605 tcp_recv(conn->pcb.tcp, NULL);
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607 /* Try to close the connection */
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608 err = tcp_close(conn->pcb.tcp);
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609 if (err == ERR_OK) {
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610 /* Closing succeeded */
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611 conn->state = NETCONN_NONE;
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612 /* Set back some callback pointers as conn is going away */
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613 tcp_err(conn->pcb.tcp, NULL);
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614 tcp_poll(conn->pcb.tcp, NULL, 4);
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615 tcp_sent(conn->pcb.tcp, NULL);
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616 tcp_recv(conn->pcb.tcp, NULL);
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617 tcp_arg(conn->pcb.tcp, NULL);
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618 conn->pcb.tcp = NULL;
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619 conn->err = ERR_OK;
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620 /* Trigger select() in socket layer. This send should something else so the
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621 errorfd is set, not the read and write fd! */
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622 API_EVENT(conn, NETCONN_EVT_RCVPLUS, 0);
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623 API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
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624 /* wake up the application task */
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625 sys_sem_signal(conn->op_completed);
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627 /* If closing didn't succeed, we get called again either
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628 from poll_tcp or from sent_tcp */
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630 #endif /* LWIP_TCP */
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633 * Delete the pcb inside a netconn.
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634 * Called from netconn_delete.
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636 * @param msg the api_msg_msg pointing to the connection
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639 do_delconn(struct api_msg_msg *msg)
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641 if (msg->conn->pcb.tcp != NULL) {
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642 switch (NETCONNTYPE_GROUP(msg->conn->type)) {
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645 raw_remove(msg->conn->pcb.raw);
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647 #endif /* LWIP_RAW */
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650 msg->conn->pcb.udp->recv_arg = NULL;
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651 udp_remove(msg->conn->pcb.udp);
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653 #endif /* LWIP_UDP */
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656 msg->conn->state = NETCONN_CLOSE;
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657 do_close_internal(msg->conn);
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658 /* API_EVENT is called inside do_close_internal, before releasing
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659 the application thread, so we can return at this point! */
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661 #endif /* LWIP_TCP */
\r
666 /* tcp netconns don't come here! */
\r
668 /* Trigger select() in socket layer. This send should something else so the
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669 errorfd is set, not the read and write fd! */
\r
670 API_EVENT(msg->conn, NETCONN_EVT_RCVPLUS, 0);
\r
671 API_EVENT(msg->conn, NETCONN_EVT_SENDPLUS, 0);
\r
673 if (msg->conn->op_completed != SYS_SEM_NULL) {
\r
674 sys_sem_signal(msg->conn->op_completed);
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679 * Bind a pcb contained in a netconn
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680 * Called from netconn_bind.
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682 * @param msg the api_msg_msg pointing to the connection and containing
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683 * the IP address and port to bind to
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686 do_bind(struct api_msg_msg *msg)
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688 if (!ERR_IS_FATAL(msg->conn->err)) {
\r
689 if (msg->conn->pcb.tcp != NULL) {
\r
690 switch (NETCONNTYPE_GROUP(msg->conn->type)) {
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693 msg->conn->err = raw_bind(msg->conn->pcb.raw, msg->msg.bc.ipaddr);
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695 #endif /* LWIP_RAW */
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698 msg->conn->err = udp_bind(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port);
\r
700 #endif /* LWIP_UDP */
\r
703 msg->conn->err = tcp_bind(msg->conn->pcb.tcp, msg->msg.bc.ipaddr, msg->msg.bc.port);
\r
705 #endif /* LWIP_TCP */
\r
710 /* msg->conn->pcb is NULL */
\r
711 msg->conn->err = ERR_VAL;
\r
714 TCPIP_APIMSG_ACK(msg);
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719 * TCP callback function if a connection (opened by tcp_connect/do_connect) has
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720 * been established (or reset by the remote host).
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722 * @see tcp.h (struct tcp_pcb.connected) for parameters and return values
\r
725 do_connected(void *arg, struct tcp_pcb *pcb, err_t err)
\r
727 struct netconn *conn;
\r
729 LWIP_UNUSED_ARG(pcb);
\r
733 if (conn == NULL) {
\r
738 if ((conn->type == NETCONN_TCP) && (err == ERR_OK)) {
\r
741 conn->state = NETCONN_NONE;
\r
742 sys_sem_signal(conn->op_completed);
\r
745 #endif /* LWIP_TCP */
\r
748 * Connect a pcb contained inside a netconn
\r
749 * Called from netconn_connect.
\r
751 * @param msg the api_msg_msg pointing to the connection and containing
\r
752 * the IP address and port to connect to
\r
755 do_connect(struct api_msg_msg *msg)
\r
757 if (msg->conn->pcb.tcp == NULL) {
\r
758 sys_sem_signal(msg->conn->op_completed);
\r
762 switch (NETCONNTYPE_GROUP(msg->conn->type)) {
\r
765 msg->conn->err = raw_connect(msg->conn->pcb.raw, msg->msg.bc.ipaddr);
\r
766 sys_sem_signal(msg->conn->op_completed);
\r
768 #endif /* LWIP_RAW */
\r
771 msg->conn->err = udp_connect(msg->conn->pcb.udp, msg->msg.bc.ipaddr, msg->msg.bc.port);
\r
772 sys_sem_signal(msg->conn->op_completed);
\r
774 #endif /* LWIP_UDP */
\r
777 msg->conn->state = NETCONN_CONNECT;
\r
778 setup_tcp(msg->conn);
\r
779 msg->conn->err = tcp_connect(msg->conn->pcb.tcp, msg->msg.bc.ipaddr, msg->msg.bc.port,
\r
781 /* sys_sem_signal() is called from do_connected (or err_tcp()),
\r
782 * when the connection is established! */
\r
784 #endif /* LWIP_TCP */
\r
791 * Connect a pcb contained inside a netconn
\r
792 * Only used for UDP netconns.
\r
793 * Called from netconn_disconnect.
\r
795 * @param msg the api_msg_msg pointing to the connection to disconnect
\r
798 do_disconnect(struct api_msg_msg *msg)
\r
801 if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) {
\r
802 udp_disconnect(msg->conn->pcb.udp);
\r
804 #endif /* LWIP_UDP */
\r
805 TCPIP_APIMSG_ACK(msg);
\r
809 * Set a TCP pcb contained in a netconn into listen mode
\r
810 * Called from netconn_listen.
\r
812 * @param msg the api_msg_msg pointing to the connection
\r
815 do_listen(struct api_msg_msg *msg)
\r
818 if (!ERR_IS_FATAL(msg->conn->err)) {
\r
819 if (msg->conn->pcb.tcp != NULL) {
\r
820 if (msg->conn->type == NETCONN_TCP) {
\r
821 if (msg->conn->pcb.tcp->state == CLOSED) {
\r
822 #if TCP_LISTEN_BACKLOG
\r
823 struct tcp_pcb* lpcb = tcp_listen_with_backlog(msg->conn->pcb.tcp, msg->msg.lb.backlog);
\r
824 #else /* TCP_LISTEN_BACKLOG */
\r
825 struct tcp_pcb* lpcb = tcp_listen(msg->conn->pcb.tcp);
\r
826 #endif /* TCP_LISTEN_BACKLOG */
\r
827 if (lpcb == NULL) {
\r
828 msg->conn->err = ERR_MEM;
\r
830 /* delete the recvmbox and allocate the acceptmbox */
\r
831 if (msg->conn->recvmbox != SYS_MBOX_NULL) {
\r
832 /** @todo: should we drain the recvmbox here? */
\r
833 sys_mbox_free(msg->conn->recvmbox);
\r
834 msg->conn->recvmbox = SYS_MBOX_NULL;
\r
836 if (msg->conn->acceptmbox == SYS_MBOX_NULL) {
\r
837 if ((msg->conn->acceptmbox = sys_mbox_new(DEFAULT_ACCEPTMBOX_SIZE)) == SYS_MBOX_NULL) {
\r
838 msg->conn->err = ERR_MEM;
\r
841 if (msg->conn->err == ERR_OK) {
\r
842 msg->conn->state = NETCONN_LISTEN;
\r
843 msg->conn->pcb.tcp = lpcb;
\r
844 tcp_arg(msg->conn->pcb.tcp, msg->conn);
\r
845 tcp_accept(msg->conn->pcb.tcp, accept_function);
\r
849 msg->conn->err = ERR_CONN;
\r
854 #endif /* LWIP_TCP */
\r
855 TCPIP_APIMSG_ACK(msg);
\r
859 * Send some data on a RAW or UDP pcb contained in a netconn
\r
860 * Called from netconn_send
\r
862 * @param msg the api_msg_msg pointing to the connection
\r
865 do_send(struct api_msg_msg *msg)
\r
867 if (!ERR_IS_FATAL(msg->conn->err)) {
\r
868 if (msg->conn->pcb.tcp != NULL) {
\r
869 switch (NETCONNTYPE_GROUP(msg->conn->type)) {
\r
872 if (msg->msg.b->addr == NULL) {
\r
873 msg->conn->err = raw_send(msg->conn->pcb.raw, msg->msg.b->p);
\r
875 msg->conn->err = raw_sendto(msg->conn->pcb.raw, msg->msg.b->p, msg->msg.b->addr);
\r
881 if (msg->msg.b->addr == NULL) {
\r
882 msg->conn->err = udp_send(msg->conn->pcb.udp, msg->msg.b->p);
\r
884 msg->conn->err = udp_sendto(msg->conn->pcb.udp, msg->msg.b->p, msg->msg.b->addr, msg->msg.b->port);
\r
887 #endif /* LWIP_UDP */
\r
893 TCPIP_APIMSG_ACK(msg);
\r
897 * Recv some data from a RAW or UDP pcb contained in a netconn
\r
898 * Called from netconn_recv
\r
900 * @param msg the api_msg_msg pointing to the connection
\r
903 do_recv(struct api_msg_msg *msg)
\r
906 if (!ERR_IS_FATAL(msg->conn->err)) {
\r
907 if (msg->conn->pcb.tcp != NULL) {
\r
908 if (msg->conn->type == NETCONN_TCP) {
\r
909 #if TCP_LISTEN_BACKLOG
\r
910 if (msg->conn->pcb.tcp->state == LISTEN) {
\r
911 tcp_accepted(msg->conn->pcb.tcp);
\r
913 #endif /* TCP_LISTEN_BACKLOG */
\r
915 tcp_recved(msg->conn->pcb.tcp, msg->msg.r.len);
\r
920 #endif /* LWIP_TCP */
\r
921 TCPIP_APIMSG_ACK(msg);
\r
926 * See if more data needs to be written from a previous call to netconn_write.
\r
927 * Called initially from do_write. If the first call can't send all data
\r
928 * (because of low memory or empty send-buffer), this function is called again
\r
929 * from sent_tcp() or poll_tcp() to send more data. If all data is sent, the
\r
930 * blocking application thread (waiting in netconn_write) is released.
\r
932 * @param conn netconn (that is currently in state NETCONN_WRITE) to process
\r
934 * ERR_MEM if LWIP_TCPIP_CORE_LOCKING=1 and sending hasn't yet finished
\r
937 do_writemore(struct netconn *conn)
\r
941 u16_t len, available;
\r
942 u8_t write_finished = 0;
\r
944 LWIP_ASSERT("conn->state == NETCONN_WRITE", (conn->state == NETCONN_WRITE));
\r
946 dataptr = (u8_t*)conn->write_msg->msg.w.dataptr + conn->write_offset;
\r
947 if ((conn->write_msg->msg.w.len - conn->write_offset > 0xffff)) { /* max_u16_t */
\r
949 #if LWIP_TCPIP_CORE_LOCKING
\r
950 conn->write_delayed = 1;
\r
953 len = conn->write_msg->msg.w.len - conn->write_offset;
\r
955 available = tcp_sndbuf(conn->pcb.tcp);
\r
956 if (available < len) {
\r
957 /* don't try to write more than sendbuf */
\r
959 #if LWIP_TCPIP_CORE_LOCKING
\r
960 conn->write_delayed = 1;
\r
964 err = tcp_write(conn->pcb.tcp, dataptr, len, conn->write_msg->msg.w.apiflags);
\r
965 LWIP_ASSERT("do_writemore: invalid length!", ((conn->write_offset + len) <= conn->write_msg->msg.w.len));
\r
966 if (err == ERR_OK) {
\r
967 conn->write_offset += len;
\r
968 if (conn->write_offset == conn->write_msg->msg.w.len) {
\r
969 /* everything was written */
\r
970 write_finished = 1;
\r
971 conn->write_msg = NULL;
\r
972 conn->write_offset = 0;
\r
974 err = tcp_output_nagle(conn->pcb.tcp);
\r
976 if ((err == ERR_OK) && (tcp_sndbuf(conn->pcb.tcp) <= TCP_SNDLOWAT)) {
\r
977 API_EVENT(conn, NETCONN_EVT_SENDMINUS, len);
\r
979 } else if (err == ERR_MEM) {
\r
980 /* If ERR_MEM, we wait for sent_tcp or poll_tcp to be called
\r
981 we do NOT return to the application thread, since ERR_MEM is
\r
982 only a temporary error! */
\r
984 /* tcp_enqueue returned ERR_MEM, try tcp_output anyway */
\r
985 err = tcp_output(conn->pcb.tcp);
\r
987 #if LWIP_TCPIP_CORE_LOCKING
\r
988 conn->write_delayed = 1;
\r
991 /* On errors != ERR_MEM, we don't try writing any more but return
\r
992 the error to the application thread. */
\r
994 write_finished = 1;
\r
997 if (write_finished) {
\r
998 /* everything was written: set back connection state
\r
999 and back to application task */
\r
1000 conn->state = NETCONN_NONE;
\r
1001 #if LWIP_TCPIP_CORE_LOCKING
\r
1002 if (conn->write_delayed != 0)
\r
1005 sys_sem_signal(conn->op_completed);
\r
1008 #if LWIP_TCPIP_CORE_LOCKING
\r
1014 #endif /* LWIP_TCP */
\r
1017 * Send some data on a TCP pcb contained in a netconn
\r
1018 * Called from netconn_write
\r
1020 * @param msg the api_msg_msg pointing to the connection
\r
1023 do_write(struct api_msg_msg *msg)
\r
1025 if (!ERR_IS_FATAL(msg->conn->err)) {
\r
1026 if ((msg->conn->pcb.tcp != NULL) && (msg->conn->type == NETCONN_TCP)) {
\r
1028 msg->conn->state = NETCONN_WRITE;
\r
1029 /* set all the variables used by do_writemore */
\r
1030 msg->conn->write_msg = msg;
\r
1031 msg->conn->write_offset = 0;
\r
1032 #if LWIP_TCPIP_CORE_LOCKING
\r
1033 msg->conn->write_delayed = 0;
\r
1034 if (do_writemore(msg->conn) != ERR_OK) {
\r
1035 LWIP_ASSERT("state!", msg->conn->state == NETCONN_WRITE);
\r
1036 UNLOCK_TCPIP_CORE();
\r
1037 sys_arch_sem_wait(msg->conn->op_completed, 0);
\r
1038 LOCK_TCPIP_CORE();
\r
1039 LWIP_ASSERT("state!", msg->conn->state == NETCONN_NONE);
\r
1042 do_writemore(msg->conn);
\r
1044 /* for both cases: if do_writemore was called, don't ACK the APIMSG! */
\r
1046 #endif /* LWIP_TCP */
\r
1047 #if (LWIP_UDP || LWIP_RAW)
\r
1049 msg->conn->err = ERR_VAL;
\r
1050 #endif /* (LWIP_UDP || LWIP_RAW) */
\r
1053 TCPIP_APIMSG_ACK(msg);
\r
1057 * Return a connection's local or remote address
\r
1058 * Called from netconn_getaddr
\r
1060 * @param msg the api_msg_msg pointing to the connection
\r
1063 do_getaddr(struct api_msg_msg *msg)
\r
1065 if (msg->conn->pcb.ip != NULL) {
\r
1066 *(msg->msg.ad.ipaddr) = (msg->msg.ad.local?msg->conn->pcb.ip->local_ip:msg->conn->pcb.ip->remote_ip);
\r
1068 switch (NETCONNTYPE_GROUP(msg->conn->type)) {
\r
1071 if (msg->msg.ad.local) {
\r
1072 *(msg->msg.ad.port) = msg->conn->pcb.raw->protocol;
\r
1074 /* return an error as connecting is only a helper for upper layers */
\r
1075 msg->conn->err = ERR_CONN;
\r
1078 #endif /* LWIP_RAW */
\r
1081 if (msg->msg.ad.local) {
\r
1082 *(msg->msg.ad.port) = msg->conn->pcb.udp->local_port;
\r
1084 if ((msg->conn->pcb.udp->flags & UDP_FLAGS_CONNECTED) == 0) {
\r
1085 msg->conn->err = ERR_CONN;
\r
1087 *(msg->msg.ad.port) = msg->conn->pcb.udp->remote_port;
\r
1091 #endif /* LWIP_UDP */
\r
1094 *(msg->msg.ad.port) = (msg->msg.ad.local?msg->conn->pcb.tcp->local_port:msg->conn->pcb.tcp->remote_port);
\r
1096 #endif /* LWIP_TCP */
\r
1099 msg->conn->err = ERR_CONN;
\r
1101 TCPIP_APIMSG_ACK(msg);
\r
1105 * Close a TCP pcb contained in a netconn
\r
1106 * Called from netconn_close
\r
1108 * @param msg the api_msg_msg pointing to the connection
\r
1111 do_close(struct api_msg_msg *msg)
\r
1114 if ((msg->conn->pcb.tcp != NULL) && (msg->conn->type == NETCONN_TCP)) {
\r
1115 msg->conn->state = NETCONN_CLOSE;
\r
1116 do_close_internal(msg->conn);
\r
1117 /* for tcp netconns, do_close_internal ACKs the message */
\r
1119 #endif /* LWIP_TCP */
\r
1121 msg->conn->err = ERR_VAL;
\r
1122 TCPIP_APIMSG_ACK(msg);
\r
1128 * Join multicast groups for UDP netconns.
\r
1129 * Called from netconn_join_leave_group
\r
1131 * @param msg the api_msg_msg pointing to the connection
\r
1134 do_join_leave_group(struct api_msg_msg *msg)
\r
1136 if (!ERR_IS_FATAL(msg->conn->err)) {
\r
1137 if (msg->conn->pcb.tcp != NULL) {
\r
1138 if (NETCONNTYPE_GROUP(msg->conn->type) == NETCONN_UDP) {
\r
1140 if (msg->msg.jl.join_or_leave == NETCONN_JOIN) {
\r
1141 msg->conn->err = igmp_joingroup(msg->msg.jl.interface, msg->msg.jl.multiaddr);
\r
1143 msg->conn->err = igmp_leavegroup(msg->msg.jl.interface, msg->msg.jl.multiaddr);
\r
1145 #endif /* LWIP_UDP */
\r
1146 #if (LWIP_TCP || LWIP_RAW)
\r
1148 msg->conn->err = ERR_VAL;
\r
1149 #endif /* (LWIP_TCP || LWIP_RAW) */
\r
1153 TCPIP_APIMSG_ACK(msg);
\r
1155 #endif /* LWIP_IGMP */
\r
1159 * Callback function that is called when DNS name is resolved
\r
1160 * (or on timeout). A waiting application thread is waked up by
\r
1161 * signaling the semaphore.
\r
1164 do_dns_found(const char *name, struct ip_addr *ipaddr, void *arg)
\r
1166 struct dns_api_msg *msg = (struct dns_api_msg*)arg;
\r
1168 LWIP_ASSERT("DNS response for wrong host name", strcmp(msg->name, name) == 0);
\r
1170 if (ipaddr == NULL) {
\r
1171 /* timeout or memory error */
\r
1172 *msg->err = ERR_VAL;
\r
1174 /* address was resolved */
\r
1175 *msg->err = ERR_OK;
\r
1176 *msg->addr = *ipaddr;
\r
1178 /* wake up the application task waiting in netconn_gethostbyname */
\r
1179 sys_sem_signal(msg->sem);
\r
1183 * Execute a DNS query
\r
1184 * Called from netconn_gethostbyname
\r
1186 * @param arg the dns_api_msg pointing to the query
\r
1189 do_gethostbyname(void *arg)
\r
1191 struct dns_api_msg *msg = (struct dns_api_msg*)arg;
\r
1193 *msg->err = dns_gethostbyname(msg->name, msg->addr, do_dns_found, msg);
\r
1194 if (*msg->err != ERR_INPROGRESS) {
\r
1195 /* on error or immediate success, wake up the application
\r
1196 * task waiting in netconn_gethostbyname */
\r
1197 sys_sem_signal(msg->sem);
\r
1200 #endif /* LWIP_DNS */
\r
1202 #endif /* LWIP_NETCONN */
\r