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EthernetInterface/lwip/api/tcpip.c@3:78f223d34f36, 2019-03-05 (annotated)

Committer:
ethaderu
Date:
Tue Mar 05 02:34:44 2019 +0000
Revision:
3:78f223d34f36
Publish 1

Who changed what in which revision?

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ethaderu 3:78f223d34f36 1 /**
ethaderu 3:78f223d34f36 2 * @file
ethaderu 3:78f223d34f36 3 * Sequential API Main thread module
ethaderu 3:78f223d34f36 4 *
ethaderu 3:78f223d34f36 5 */
ethaderu 3:78f223d34f36 6
ethaderu 3:78f223d34f36 7 /*
ethaderu 3:78f223d34f36 8 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
ethaderu 3:78f223d34f36 9 * All rights reserved.
ethaderu 3:78f223d34f36 10 *
ethaderu 3:78f223d34f36 11 * Redistribution and use in source and binary forms, with or without modification,
ethaderu 3:78f223d34f36 12 * are permitted provided that the following conditions are met:
ethaderu 3:78f223d34f36 13 *
ethaderu 3:78f223d34f36 14 * 1. Redistributions of source code must retain the above copyright notice,
ethaderu 3:78f223d34f36 15 * this list of conditions and the following disclaimer.
ethaderu 3:78f223d34f36 16 * 2. Redistributions in binary form must reproduce the above copyright notice,
ethaderu 3:78f223d34f36 17 * this list of conditions and the following disclaimer in the documentation
ethaderu 3:78f223d34f36 18 * and/or other materials provided with the distribution.
ethaderu 3:78f223d34f36 19 * 3. The name of the author may not be used to endorse or promote products
ethaderu 3:78f223d34f36 20 * derived from this software without specific prior written permission.
ethaderu 3:78f223d34f36 21 *
ethaderu 3:78f223d34f36 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
ethaderu 3:78f223d34f36 23 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
ethaderu 3:78f223d34f36 24 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
ethaderu 3:78f223d34f36 25 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
ethaderu 3:78f223d34f36 26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
ethaderu 3:78f223d34f36 27 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
ethaderu 3:78f223d34f36 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
ethaderu 3:78f223d34f36 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
ethaderu 3:78f223d34f36 30 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
ethaderu 3:78f223d34f36 31 * OF SUCH DAMAGE.
ethaderu 3:78f223d34f36 32 *
ethaderu 3:78f223d34f36 33 * This file is part of the lwIP TCP/IP stack.
ethaderu 3:78f223d34f36 34 *
ethaderu 3:78f223d34f36 35 * Author: Adam Dunkels <adam@sics.se>
ethaderu 3:78f223d34f36 36 *
ethaderu 3:78f223d34f36 37 */
ethaderu 3:78f223d34f36 38
ethaderu 3:78f223d34f36 39 #include "lwip/opt.h"
ethaderu 3:78f223d34f36 40
ethaderu 3:78f223d34f36 41 #if !NO_SYS /* don't build if not configured for use in lwipopts.h */
ethaderu 3:78f223d34f36 42
ethaderu 3:78f223d34f36 43 #include "lwip/sys.h"
ethaderu 3:78f223d34f36 44 #include "lwip/memp.h"
ethaderu 3:78f223d34f36 45 #include "lwip/mem.h"
ethaderu 3:78f223d34f36 46 #include "lwip/pbuf.h"
ethaderu 3:78f223d34f36 47 #include "lwip/tcpip.h"
ethaderu 3:78f223d34f36 48 #include "lwip/init.h"
ethaderu 3:78f223d34f36 49 #include "netif/etharp.h"
ethaderu 3:78f223d34f36 50 #include "netif/ppp_oe.h"
ethaderu 3:78f223d34f36 51
ethaderu 3:78f223d34f36 52 /* global variables */
ethaderu 3:78f223d34f36 53 static tcpip_init_done_fn tcpip_init_done;
ethaderu 3:78f223d34f36 54 static void *tcpip_init_done_arg;
ethaderu 3:78f223d34f36 55 static sys_mbox_t mbox;
ethaderu 3:78f223d34f36 56
ethaderu 3:78f223d34f36 57 #if LWIP_TCPIP_CORE_LOCKING
ethaderu 3:78f223d34f36 58 /** The global semaphore to lock the stack. */
ethaderu 3:78f223d34f36 59 sys_mutex_t lock_tcpip_core;
ethaderu 3:78f223d34f36 60 #endif /* LWIP_TCPIP_CORE_LOCKING */
ethaderu 3:78f223d34f36 61
ethaderu 3:78f223d34f36 62
ethaderu 3:78f223d34f36 63 /**
ethaderu 3:78f223d34f36 64 * The main lwIP thread. This thread has exclusive access to lwIP core functions
ethaderu 3:78f223d34f36 65 * (unless access to them is not locked). Other threads communicate with this
ethaderu 3:78f223d34f36 66 * thread using message boxes.
ethaderu 3:78f223d34f36 67 *
ethaderu 3:78f223d34f36 68 * It also starts all the timers to make sure they are running in the right
ethaderu 3:78f223d34f36 69 * thread context.
ethaderu 3:78f223d34f36 70 *
ethaderu 3:78f223d34f36 71 * @param arg unused argument
ethaderu 3:78f223d34f36 72 */
ethaderu 3:78f223d34f36 73 static void
ethaderu 3:78f223d34f36 74 tcpip_thread(void *arg)
ethaderu 3:78f223d34f36 75 {
ethaderu 3:78f223d34f36 76 struct tcpip_msg *msg;
ethaderu 3:78f223d34f36 77 LWIP_UNUSED_ARG(arg);
ethaderu 3:78f223d34f36 78
ethaderu 3:78f223d34f36 79 if (tcpip_init_done != NULL) {
ethaderu 3:78f223d34f36 80 tcpip_init_done(tcpip_init_done_arg);
ethaderu 3:78f223d34f36 81 }
ethaderu 3:78f223d34f36 82
ethaderu 3:78f223d34f36 83 LOCK_TCPIP_CORE();
ethaderu 3:78f223d34f36 84 while (1) { /* MAIN Loop */
ethaderu 3:78f223d34f36 85 UNLOCK_TCPIP_CORE();
ethaderu 3:78f223d34f36 86 LWIP_TCPIP_THREAD_ALIVE();
ethaderu 3:78f223d34f36 87 /* wait for a message, timeouts are processed while waiting */
ethaderu 3:78f223d34f36 88 sys_timeouts_mbox_fetch(&mbox, (void **)&msg);
ethaderu 3:78f223d34f36 89 LOCK_TCPIP_CORE();
ethaderu 3:78f223d34f36 90 switch (msg->type) {
ethaderu 3:78f223d34f36 91 #if LWIP_NETCONN
ethaderu 3:78f223d34f36 92 case TCPIP_MSG_API:
ethaderu 3:78f223d34f36 93 LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: API message %p\n", (void *)msg));
ethaderu 3:78f223d34f36 94 msg->msg.apimsg->function(&(msg->msg.apimsg->msg));
ethaderu 3:78f223d34f36 95 break;
ethaderu 3:78f223d34f36 96 #endif /* LWIP_NETCONN */
ethaderu 3:78f223d34f36 97
ethaderu 3:78f223d34f36 98 #if !LWIP_TCPIP_CORE_LOCKING_INPUT
ethaderu 3:78f223d34f36 99 case TCPIP_MSG_INPKT:
ethaderu 3:78f223d34f36 100 LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: PACKET %p\n", (void *)msg));
ethaderu 3:78f223d34f36 101 #if LWIP_ETHERNET
ethaderu 3:78f223d34f36 102 if (msg->msg.inp.netif->flags & (NETIF_FLAG_ETHARP | NETIF_FLAG_ETHERNET)) {
ethaderu 3:78f223d34f36 103 ethernet_input(msg->msg.inp.p, msg->msg.inp.netif);
ethaderu 3:78f223d34f36 104 } else
ethaderu 3:78f223d34f36 105 #endif /* LWIP_ETHERNET */
ethaderu 3:78f223d34f36 106 {
ethaderu 3:78f223d34f36 107 ip_input(msg->msg.inp.p, msg->msg.inp.netif);
ethaderu 3:78f223d34f36 108 }
ethaderu 3:78f223d34f36 109 memp_free(MEMP_TCPIP_MSG_INPKT, msg);
ethaderu 3:78f223d34f36 110 break;
ethaderu 3:78f223d34f36 111 #endif /* LWIP_TCPIP_CORE_LOCKING_INPUT */
ethaderu 3:78f223d34f36 112
ethaderu 3:78f223d34f36 113 #if LWIP_NETIF_API
ethaderu 3:78f223d34f36 114 case TCPIP_MSG_NETIFAPI:
ethaderu 3:78f223d34f36 115 LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: Netif API message %p\n", (void *)msg));
ethaderu 3:78f223d34f36 116 msg->msg.netifapimsg->function(&(msg->msg.netifapimsg->msg));
ethaderu 3:78f223d34f36 117 break;
ethaderu 3:78f223d34f36 118 #endif /* LWIP_NETIF_API */
ethaderu 3:78f223d34f36 119
ethaderu 3:78f223d34f36 120 case TCPIP_MSG_CALLBACK:
ethaderu 3:78f223d34f36 121 LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: CALLBACK %p\n", (void *)msg));
ethaderu 3:78f223d34f36 122 msg->msg.cb.function(msg->msg.cb.ctx);
ethaderu 3:78f223d34f36 123 memp_free(MEMP_TCPIP_MSG_API, msg);
ethaderu 3:78f223d34f36 124 break;
ethaderu 3:78f223d34f36 125
ethaderu 3:78f223d34f36 126 #if LWIP_TCPIP_TIMEOUT
ethaderu 3:78f223d34f36 127 case TCPIP_MSG_TIMEOUT:
ethaderu 3:78f223d34f36 128 LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: TIMEOUT %p\n", (void *)msg));
ethaderu 3:78f223d34f36 129 sys_timeout(msg->msg.tmo.msecs, msg->msg.tmo.h, msg->msg.tmo.arg);
ethaderu 3:78f223d34f36 130 memp_free(MEMP_TCPIP_MSG_API, msg);
ethaderu 3:78f223d34f36 131 break;
ethaderu 3:78f223d34f36 132 case TCPIP_MSG_UNTIMEOUT:
ethaderu 3:78f223d34f36 133 LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: UNTIMEOUT %p\n", (void *)msg));
ethaderu 3:78f223d34f36 134 sys_untimeout(msg->msg.tmo.h, msg->msg.tmo.arg);
ethaderu 3:78f223d34f36 135 memp_free(MEMP_TCPIP_MSG_API, msg);
ethaderu 3:78f223d34f36 136 break;
ethaderu 3:78f223d34f36 137 #endif /* LWIP_TCPIP_TIMEOUT */
ethaderu 3:78f223d34f36 138
ethaderu 3:78f223d34f36 139 default:
ethaderu 3:78f223d34f36 140 LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: invalid message: %d\n", msg->type));
ethaderu 3:78f223d34f36 141 LWIP_ASSERT("tcpip_thread: invalid message", 0);
ethaderu 3:78f223d34f36 142 break;
ethaderu 3:78f223d34f36 143 }
ethaderu 3:78f223d34f36 144 }
ethaderu 3:78f223d34f36 145 }
ethaderu 3:78f223d34f36 146
ethaderu 3:78f223d34f36 147 /**
ethaderu 3:78f223d34f36 148 * Pass a received packet to tcpip_thread for input processing
ethaderu 3:78f223d34f36 149 *
ethaderu 3:78f223d34f36 150 * @param p the received packet, p->payload pointing to the Ethernet header or
ethaderu 3:78f223d34f36 151 * to an IP header (if inp doesn't have NETIF_FLAG_ETHARP or
ethaderu 3:78f223d34f36 152 * NETIF_FLAG_ETHERNET flags)
ethaderu 3:78f223d34f36 153 * @param inp the network interface on which the packet was received
ethaderu 3:78f223d34f36 154 */
ethaderu 3:78f223d34f36 155 err_t
ethaderu 3:78f223d34f36 156 tcpip_input(struct pbuf *p, struct netif *inp)
ethaderu 3:78f223d34f36 157 {
ethaderu 3:78f223d34f36 158 #if LWIP_TCPIP_CORE_LOCKING_INPUT
ethaderu 3:78f223d34f36 159 err_t ret;
ethaderu 3:78f223d34f36 160 LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_input: PACKET %p/%p\n", (void *)p, (void *)inp));
ethaderu 3:78f223d34f36 161 LOCK_TCPIP_CORE();
ethaderu 3:78f223d34f36 162 #if LWIP_ETHERNET
ethaderu 3:78f223d34f36 163 if (inp->flags & (NETIF_FLAG_ETHARP | NETIF_FLAG_ETHERNET)) {
ethaderu 3:78f223d34f36 164 ret = ethernet_input(p, inp);
ethaderu 3:78f223d34f36 165 } else
ethaderu 3:78f223d34f36 166 #endif /* LWIP_ETHERNET */
ethaderu 3:78f223d34f36 167 {
ethaderu 3:78f223d34f36 168 ret = ip_input(p, inp);
ethaderu 3:78f223d34f36 169 }
ethaderu 3:78f223d34f36 170 UNLOCK_TCPIP_CORE();
ethaderu 3:78f223d34f36 171 return ret;
ethaderu 3:78f223d34f36 172 #else /* LWIP_TCPIP_CORE_LOCKING_INPUT */
ethaderu 3:78f223d34f36 173 struct tcpip_msg *msg;
ethaderu 3:78f223d34f36 174
ethaderu 3:78f223d34f36 175 if (sys_mbox_valid(&mbox)) {
ethaderu 3:78f223d34f36 176 msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_INPKT);
ethaderu 3:78f223d34f36 177 if (msg == NULL) {
ethaderu 3:78f223d34f36 178 return ERR_MEM;
ethaderu 3:78f223d34f36 179 }
ethaderu 3:78f223d34f36 180
ethaderu 3:78f223d34f36 181 msg->type = TCPIP_MSG_INPKT;
ethaderu 3:78f223d34f36 182 msg->msg.inp.p = p;
ethaderu 3:78f223d34f36 183 msg->msg.inp.netif = inp;
ethaderu 3:78f223d34f36 184 if (sys_mbox_trypost(&mbox, msg) != ERR_OK) {
ethaderu 3:78f223d34f36 185 memp_free(MEMP_TCPIP_MSG_INPKT, msg);
ethaderu 3:78f223d34f36 186 return ERR_MEM;
ethaderu 3:78f223d34f36 187 }
ethaderu 3:78f223d34f36 188 return ERR_OK;
ethaderu 3:78f223d34f36 189 }
ethaderu 3:78f223d34f36 190 return ERR_VAL;
ethaderu 3:78f223d34f36 191 #endif /* LWIP_TCPIP_CORE_LOCKING_INPUT */
ethaderu 3:78f223d34f36 192 }
ethaderu 3:78f223d34f36 193
ethaderu 3:78f223d34f36 194 /**
ethaderu 3:78f223d34f36 195 * Call a specific function in the thread context of
ethaderu 3:78f223d34f36 196 * tcpip_thread for easy access synchronization.
ethaderu 3:78f223d34f36 197 * A function called in that way may access lwIP core code
ethaderu 3:78f223d34f36 198 * without fearing concurrent access.
ethaderu 3:78f223d34f36 199 *
ethaderu 3:78f223d34f36 200 * @param f the function to call
ethaderu 3:78f223d34f36 201 * @param ctx parameter passed to f
ethaderu 3:78f223d34f36 202 * @param block 1 to block until the request is posted, 0 to non-blocking mode
ethaderu 3:78f223d34f36 203 * @return ERR_OK if the function was called, another err_t if not
ethaderu 3:78f223d34f36 204 */
ethaderu 3:78f223d34f36 205 err_t
ethaderu 3:78f223d34f36 206 tcpip_callback_with_block(tcpip_callback_fn function, void *ctx, u8_t block)
ethaderu 3:78f223d34f36 207 {
ethaderu 3:78f223d34f36 208 struct tcpip_msg *msg;
ethaderu 3:78f223d34f36 209
ethaderu 3:78f223d34f36 210 if (sys_mbox_valid(&mbox)) {
ethaderu 3:78f223d34f36 211 msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API);
ethaderu 3:78f223d34f36 212 if (msg == NULL) {
ethaderu 3:78f223d34f36 213 return ERR_MEM;
ethaderu 3:78f223d34f36 214 }
ethaderu 3:78f223d34f36 215
ethaderu 3:78f223d34f36 216 msg->type = TCPIP_MSG_CALLBACK;
ethaderu 3:78f223d34f36 217 msg->msg.cb.function = function;
ethaderu 3:78f223d34f36 218 msg->msg.cb.ctx = ctx;
ethaderu 3:78f223d34f36 219 if (block) {
ethaderu 3:78f223d34f36 220 sys_mbox_post(&mbox, msg);
ethaderu 3:78f223d34f36 221 } else {
ethaderu 3:78f223d34f36 222 if (sys_mbox_trypost(&mbox, msg) != ERR_OK) {
ethaderu 3:78f223d34f36 223 memp_free(MEMP_TCPIP_MSG_API, msg);
ethaderu 3:78f223d34f36 224 return ERR_MEM;
ethaderu 3:78f223d34f36 225 }
ethaderu 3:78f223d34f36 226 }
ethaderu 3:78f223d34f36 227 return ERR_OK;
ethaderu 3:78f223d34f36 228 }
ethaderu 3:78f223d34f36 229 return ERR_VAL;
ethaderu 3:78f223d34f36 230 }
ethaderu 3:78f223d34f36 231
ethaderu 3:78f223d34f36 232 #if LWIP_TCPIP_TIMEOUT
ethaderu 3:78f223d34f36 233 /**
ethaderu 3:78f223d34f36 234 * call sys_timeout in tcpip_thread
ethaderu 3:78f223d34f36 235 *
ethaderu 3:78f223d34f36 236 * @param msec time in milliseconds for timeout
ethaderu 3:78f223d34f36 237 * @param h function to be called on timeout
ethaderu 3:78f223d34f36 238 * @param arg argument to pass to timeout function h
ethaderu 3:78f223d34f36 239 * @return ERR_MEM on memory error, ERR_OK otherwise
ethaderu 3:78f223d34f36 240 */
ethaderu 3:78f223d34f36 241 err_t
ethaderu 3:78f223d34f36 242 tcpip_timeout(u32_t msecs, sys_timeout_handler h, void *arg)
ethaderu 3:78f223d34f36 243 {
ethaderu 3:78f223d34f36 244 struct tcpip_msg *msg;
ethaderu 3:78f223d34f36 245
ethaderu 3:78f223d34f36 246 if (sys_mbox_valid(&mbox)) {
ethaderu 3:78f223d34f36 247 msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API);
ethaderu 3:78f223d34f36 248 if (msg == NULL) {
ethaderu 3:78f223d34f36 249 return ERR_MEM;
ethaderu 3:78f223d34f36 250 }
ethaderu 3:78f223d34f36 251
ethaderu 3:78f223d34f36 252 msg->type = TCPIP_MSG_TIMEOUT;
ethaderu 3:78f223d34f36 253 msg->msg.tmo.msecs = msecs;
ethaderu 3:78f223d34f36 254 msg->msg.tmo.h = h;
ethaderu 3:78f223d34f36 255 msg->msg.tmo.arg = arg;
ethaderu 3:78f223d34f36 256 sys_mbox_post(&mbox, msg);
ethaderu 3:78f223d34f36 257 return ERR_OK;
ethaderu 3:78f223d34f36 258 }
ethaderu 3:78f223d34f36 259 return ERR_VAL;
ethaderu 3:78f223d34f36 260 }
ethaderu 3:78f223d34f36 261
ethaderu 3:78f223d34f36 262 /**
ethaderu 3:78f223d34f36 263 * call sys_untimeout in tcpip_thread
ethaderu 3:78f223d34f36 264 *
ethaderu 3:78f223d34f36 265 * @param msec time in milliseconds for timeout
ethaderu 3:78f223d34f36 266 * @param h function to be called on timeout
ethaderu 3:78f223d34f36 267 * @param arg argument to pass to timeout function h
ethaderu 3:78f223d34f36 268 * @return ERR_MEM on memory error, ERR_OK otherwise
ethaderu 3:78f223d34f36 269 */
ethaderu 3:78f223d34f36 270 err_t
ethaderu 3:78f223d34f36 271 tcpip_untimeout(sys_timeout_handler h, void *arg)
ethaderu 3:78f223d34f36 272 {
ethaderu 3:78f223d34f36 273 struct tcpip_msg *msg;
ethaderu 3:78f223d34f36 274
ethaderu 3:78f223d34f36 275 if (sys_mbox_valid(&mbox)) {
ethaderu 3:78f223d34f36 276 msg = (struct tcpip_msg *)memp_malloc(MEMP_TCPIP_MSG_API);
ethaderu 3:78f223d34f36 277 if (msg == NULL) {
ethaderu 3:78f223d34f36 278 return ERR_MEM;
ethaderu 3:78f223d34f36 279 }
ethaderu 3:78f223d34f36 280
ethaderu 3:78f223d34f36 281 msg->type = TCPIP_MSG_UNTIMEOUT;
ethaderu 3:78f223d34f36 282 msg->msg.tmo.h = h;
ethaderu 3:78f223d34f36 283 msg->msg.tmo.arg = arg;
ethaderu 3:78f223d34f36 284 sys_mbox_post(&mbox, msg);
ethaderu 3:78f223d34f36 285 return ERR_OK;
ethaderu 3:78f223d34f36 286 }
ethaderu 3:78f223d34f36 287 return ERR_VAL;
ethaderu 3:78f223d34f36 288 }
ethaderu 3:78f223d34f36 289 #endif /* LWIP_TCPIP_TIMEOUT */
ethaderu 3:78f223d34f36 290
ethaderu 3:78f223d34f36 291 #if LWIP_NETCONN
ethaderu 3:78f223d34f36 292 /**
ethaderu 3:78f223d34f36 293 * Call the lower part of a netconn_* function
ethaderu 3:78f223d34f36 294 * This function is then running in the thread context
ethaderu 3:78f223d34f36 295 * of tcpip_thread and has exclusive access to lwIP core code.
ethaderu 3:78f223d34f36 296 *
ethaderu 3:78f223d34f36 297 * @param apimsg a struct containing the function to call and its parameters
ethaderu 3:78f223d34f36 298 * @return ERR_OK if the function was called, another err_t if not
ethaderu 3:78f223d34f36 299 */
ethaderu 3:78f223d34f36 300 err_t
ethaderu 3:78f223d34f36 301 tcpip_apimsg(struct api_msg *apimsg)
ethaderu 3:78f223d34f36 302 {
ethaderu 3:78f223d34f36 303 struct tcpip_msg msg;
ethaderu 3:78f223d34f36 304 #ifdef LWIP_DEBUG
ethaderu 3:78f223d34f36 305 /* catch functions that don't set err */
ethaderu 3:78f223d34f36 306 apimsg->msg.err = ERR_VAL;
ethaderu 3:78f223d34f36 307 #endif
ethaderu 3:78f223d34f36 308
ethaderu 3:78f223d34f36 309 if (sys_mbox_valid(&mbox)) {
ethaderu 3:78f223d34f36 310 msg.type = TCPIP_MSG_API;
ethaderu 3:78f223d34f36 311 msg.msg.apimsg = apimsg;
ethaderu 3:78f223d34f36 312 sys_mbox_post(&mbox, &msg);
ethaderu 3:78f223d34f36 313 sys_arch_sem_wait(&apimsg->msg.conn->op_completed, 0);
ethaderu 3:78f223d34f36 314 return apimsg->msg.err;
ethaderu 3:78f223d34f36 315 }
ethaderu 3:78f223d34f36 316 return ERR_VAL;
ethaderu 3:78f223d34f36 317 }
ethaderu 3:78f223d34f36 318
ethaderu 3:78f223d34f36 319 #if LWIP_TCPIP_CORE_LOCKING
ethaderu 3:78f223d34f36 320 /**
ethaderu 3:78f223d34f36 321 * Call the lower part of a netconn_* function
ethaderu 3:78f223d34f36 322 * This function has exclusive access to lwIP core code by locking it
ethaderu 3:78f223d34f36 323 * before the function is called.
ethaderu 3:78f223d34f36 324 *
ethaderu 3:78f223d34f36 325 * @param apimsg a struct containing the function to call and its parameters
ethaderu 3:78f223d34f36 326 * @return ERR_OK (only for compatibility fo tcpip_apimsg())
ethaderu 3:78f223d34f36 327 */
ethaderu 3:78f223d34f36 328 err_t
ethaderu 3:78f223d34f36 329 tcpip_apimsg_lock(struct api_msg *apimsg)
ethaderu 3:78f223d34f36 330 {
ethaderu 3:78f223d34f36 331 #ifdef LWIP_DEBUG
ethaderu 3:78f223d34f36 332 /* catch functions that don't set err */
ethaderu 3:78f223d34f36 333 apimsg->msg.err = ERR_VAL;
ethaderu 3:78f223d34f36 334 #endif
ethaderu 3:78f223d34f36 335
ethaderu 3:78f223d34f36 336 LOCK_TCPIP_CORE();
ethaderu 3:78f223d34f36 337 apimsg->function(&(apimsg->msg));
ethaderu 3:78f223d34f36 338 UNLOCK_TCPIP_CORE();
ethaderu 3:78f223d34f36 339 return apimsg->msg.err;
ethaderu 3:78f223d34f36 340
ethaderu 3:78f223d34f36 341 }
ethaderu 3:78f223d34f36 342 #endif /* LWIP_TCPIP_CORE_LOCKING */
ethaderu 3:78f223d34f36 343 #endif /* LWIP_NETCONN */
ethaderu 3:78f223d34f36 344
ethaderu 3:78f223d34f36 345 #if LWIP_NETIF_API
ethaderu 3:78f223d34f36 346 #if !LWIP_TCPIP_CORE_LOCKING
ethaderu 3:78f223d34f36 347 /**
ethaderu 3:78f223d34f36 348 * Much like tcpip_apimsg, but calls the lower part of a netifapi_*
ethaderu 3:78f223d34f36 349 * function.
ethaderu 3:78f223d34f36 350 *
ethaderu 3:78f223d34f36 351 * @param netifapimsg a struct containing the function to call and its parameters
ethaderu 3:78f223d34f36 352 * @return error code given back by the function that was called
ethaderu 3:78f223d34f36 353 */
ethaderu 3:78f223d34f36 354 err_t
ethaderu 3:78f223d34f36 355 tcpip_netifapi(struct netifapi_msg* netifapimsg)
ethaderu 3:78f223d34f36 356 {
ethaderu 3:78f223d34f36 357 struct tcpip_msg msg;
ethaderu 3:78f223d34f36 358
ethaderu 3:78f223d34f36 359 if (sys_mbox_valid(&mbox)) {
ethaderu 3:78f223d34f36 360 err_t err = sys_sem_new(&netifapimsg->msg.sem, 0);
ethaderu 3:78f223d34f36 361 if (err != ERR_OK) {
ethaderu 3:78f223d34f36 362 netifapimsg->msg.err = err;
ethaderu 3:78f223d34f36 363 return err;
ethaderu 3:78f223d34f36 364 }
ethaderu 3:78f223d34f36 365
ethaderu 3:78f223d34f36 366 msg.type = TCPIP_MSG_NETIFAPI;
ethaderu 3:78f223d34f36 367 msg.msg.netifapimsg = netifapimsg;
ethaderu 3:78f223d34f36 368 sys_mbox_post(&mbox, &msg);
ethaderu 3:78f223d34f36 369 sys_sem_wait(&netifapimsg->msg.sem);
ethaderu 3:78f223d34f36 370 sys_sem_free(&netifapimsg->msg.sem);
ethaderu 3:78f223d34f36 371 return netifapimsg->msg.err;
ethaderu 3:78f223d34f36 372 }
ethaderu 3:78f223d34f36 373 return ERR_VAL;
ethaderu 3:78f223d34f36 374 }
ethaderu 3:78f223d34f36 375 #else /* !LWIP_TCPIP_CORE_LOCKING */
ethaderu 3:78f223d34f36 376 /**
ethaderu 3:78f223d34f36 377 * Call the lower part of a netifapi_* function
ethaderu 3:78f223d34f36 378 * This function has exclusive access to lwIP core code by locking it
ethaderu 3:78f223d34f36 379 * before the function is called.
ethaderu 3:78f223d34f36 380 *
ethaderu 3:78f223d34f36 381 * @param netifapimsg a struct containing the function to call and its parameters
ethaderu 3:78f223d34f36 382 * @return ERR_OK (only for compatibility fo tcpip_netifapi())
ethaderu 3:78f223d34f36 383 */
ethaderu 3:78f223d34f36 384 err_t
ethaderu 3:78f223d34f36 385 tcpip_netifapi_lock(struct netifapi_msg* netifapimsg)
ethaderu 3:78f223d34f36 386 {
ethaderu 3:78f223d34f36 387 LOCK_TCPIP_CORE();
ethaderu 3:78f223d34f36 388 netifapimsg->function(&(netifapimsg->msg));
ethaderu 3:78f223d34f36 389 UNLOCK_TCPIP_CORE();
ethaderu 3:78f223d34f36 390 return netifapimsg->msg.err;
ethaderu 3:78f223d34f36 391 }
ethaderu 3:78f223d34f36 392 #endif /* !LWIP_TCPIP_CORE_LOCKING */
ethaderu 3:78f223d34f36 393 #endif /* LWIP_NETIF_API */
ethaderu 3:78f223d34f36 394
ethaderu 3:78f223d34f36 395 /**
ethaderu 3:78f223d34f36 396 * Initialize this module:
ethaderu 3:78f223d34f36 397 * - initialize all sub modules
ethaderu 3:78f223d34f36 398 * - start the tcpip_thread
ethaderu 3:78f223d34f36 399 *
ethaderu 3:78f223d34f36 400 * @param initfunc a function to call when tcpip_thread is running and finished initializing
ethaderu 3:78f223d34f36 401 * @param arg argument to pass to initfunc
ethaderu 3:78f223d34f36 402 */
ethaderu 3:78f223d34f36 403 void
ethaderu 3:78f223d34f36 404 tcpip_init(tcpip_init_done_fn initfunc, void *arg)
ethaderu 3:78f223d34f36 405 {
ethaderu 3:78f223d34f36 406 lwip_init();
ethaderu 3:78f223d34f36 407
ethaderu 3:78f223d34f36 408 tcpip_init_done = initfunc;
ethaderu 3:78f223d34f36 409 tcpip_init_done_arg = arg;
ethaderu 3:78f223d34f36 410 if(sys_mbox_new(&mbox, TCPIP_MBOX_SIZE) != ERR_OK) {
ethaderu 3:78f223d34f36 411 LWIP_ASSERT("failed to create tcpip_thread mbox", 0);
ethaderu 3:78f223d34f36 412 }
ethaderu 3:78f223d34f36 413 #if LWIP_TCPIP_CORE_LOCKING
ethaderu 3:78f223d34f36 414 if(sys_mutex_new(&lock_tcpip_core) != ERR_OK) {
ethaderu 3:78f223d34f36 415 LWIP_ASSERT("failed to create lock_tcpip_core", 0);
ethaderu 3:78f223d34f36 416 }
ethaderu 3:78f223d34f36 417 #endif /* LWIP_TCPIP_CORE_LOCKING */
ethaderu 3:78f223d34f36 418
ethaderu 3:78f223d34f36 419 sys_thread_new(TCPIP_THREAD_NAME, tcpip_thread, NULL, TCPIP_THREAD_STACKSIZE, TCPIP_THREAD_PRIO);
ethaderu 3:78f223d34f36 420 }
ethaderu 3:78f223d34f36 421
ethaderu 3:78f223d34f36 422 /**
ethaderu 3:78f223d34f36 423 * Simple callback function used with tcpip_callback to free a pbuf
ethaderu 3:78f223d34f36 424 * (pbuf_free has a wrong signature for tcpip_callback)
ethaderu 3:78f223d34f36 425 *
ethaderu 3:78f223d34f36 426 * @param p The pbuf (chain) to be dereferenced.
ethaderu 3:78f223d34f36 427 */
ethaderu 3:78f223d34f36 428 static void
ethaderu 3:78f223d34f36 429 pbuf_free_int(void *p)
ethaderu 3:78f223d34f36 430 {
ethaderu 3:78f223d34f36 431 struct pbuf *q = (struct pbuf *)p;
ethaderu 3:78f223d34f36 432 pbuf_free(q);
ethaderu 3:78f223d34f36 433 }
ethaderu 3:78f223d34f36 434
ethaderu 3:78f223d34f36 435 /**
ethaderu 3:78f223d34f36 436 * A simple wrapper function that allows you to free a pbuf from interrupt context.
ethaderu 3:78f223d34f36 437 *
ethaderu 3:78f223d34f36 438 * @param p The pbuf (chain) to be dereferenced.
ethaderu 3:78f223d34f36 439 * @return ERR_OK if callback could be enqueued, an err_t if not
ethaderu 3:78f223d34f36 440 */
ethaderu 3:78f223d34f36 441 err_t
ethaderu 3:78f223d34f36 442 pbuf_free_callback(struct pbuf *p)
ethaderu 3:78f223d34f36 443 {
ethaderu 3:78f223d34f36 444 return tcpip_callback_with_block(pbuf_free_int, p, 0);
ethaderu 3:78f223d34f36 445 }
ethaderu 3:78f223d34f36 446
ethaderu 3:78f223d34f36 447 /**
ethaderu 3:78f223d34f36 448 * A simple wrapper function that allows you to free heap memory from
ethaderu 3:78f223d34f36 449 * interrupt context.
ethaderu 3:78f223d34f36 450 *
ethaderu 3:78f223d34f36 451 * @param m the heap memory to free
ethaderu 3:78f223d34f36 452 * @return ERR_OK if callback could be enqueued, an err_t if not
ethaderu 3:78f223d34f36 453 */
ethaderu 3:78f223d34f36 454 err_t
ethaderu 3:78f223d34f36 455 mem_free_callback(void *m)
ethaderu 3:78f223d34f36 456 {
ethaderu 3:78f223d34f36 457 return tcpip_callback_with_block(mem_free, m, 0);
ethaderu 3:78f223d34f36 458 }
ethaderu 3:78f223d34f36 459
ethaderu 3:78f223d34f36 460 #endif /* !NO_SYS */