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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [Common/] [ethernet/] [lwIP_130/] [src/] [api/] [tcpip.c] - Blame information for rev 606

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Line No. Rev Author Line
1 606 jeremybenn
/**
2
 * @file
3
 * Sequential API Main thread module
4
 *
5
 */
6
 
7
/*
8
 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
9
 * All rights reserved.
10
 *
11
 * Redistribution and use in source and binary forms, with or without modification,
12
 * are permitted provided that the following conditions are met:
13
 *
14
 * 1. Redistributions of source code must retain the above copyright notice,
15
 *    this list of conditions and the following disclaimer.
16
 * 2. Redistributions in binary form must reproduce the above copyright notice,
17
 *    this list of conditions and the following disclaimer in the documentation
18
 *    and/or other materials provided with the distribution.
19
 * 3. The name of the author may not be used to endorse or promote products
20
 *    derived from this software without specific prior written permission.
21
 *
22
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
23
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
25
 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
26
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
27
 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
30
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
31
 * OF SUCH DAMAGE.
32
 *
33
 * This file is part of the lwIP TCP/IP stack.
34
 *
35
 * Author: Adam Dunkels <adam@sics.se>
36
 *
37
 */
38
 
39
#include "lwip/opt.h"
40
 
41
#if !NO_SYS /* don't build if not configured for use in lwipopts.h */
42
 
43
#include "lwip/sys.h"
44
#include "lwip/memp.h"
45
#include "lwip/pbuf.h"
46
#include "lwip/ip_frag.h"
47
#include "lwip/tcp.h"
48
#include "lwip/autoip.h"
49
#include "lwip/dhcp.h"
50
#include "lwip/igmp.h"
51
#include "lwip/dns.h"
52
#include "lwip/tcpip.h"
53
#include "lwip/init.h"
54
#include "netif/etharp.h"
55
#include "netif/ppp_oe.h"
56
 
57
/* global variables */
58
static void (* tcpip_init_done)(void *arg);
59
static void *tcpip_init_done_arg;
60
static sys_mbox_t mbox = SYS_MBOX_NULL;
61
 
62
#if LWIP_TCPIP_CORE_LOCKING
63
/** The global semaphore to lock the stack. */
64
sys_sem_t lock_tcpip_core;
65
#endif /* LWIP_TCPIP_CORE_LOCKING */
66
 
67
#if LWIP_TCP
68
/* global variable that shows if the tcp timer is currently scheduled or not */
69
static int tcpip_tcp_timer_active;
70
 
71
/**
72
 * Timer callback function that calls tcp_tmr() and reschedules itself.
73
 *
74
 * @param arg unused argument
75
 */
76
static void
77
tcpip_tcp_timer(void *arg)
78
{
79
  LWIP_UNUSED_ARG(arg);
80
 
81
  /* call TCP timer handler */
82
  tcp_tmr();
83
  /* timer still needed? */
84
  if (tcp_active_pcbs || tcp_tw_pcbs) {
85
    /* restart timer */
86
    sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL);
87
  } else {
88
    /* disable timer */
89
    tcpip_tcp_timer_active = 0;
90
  }
91
}
92
 
93
#if !NO_SYS
94
/**
95
 * Called from TCP_REG when registering a new PCB:
96
 * the reason is to have the TCP timer only running when
97
 * there are active (or time-wait) PCBs.
98
 */
99
void
100
tcp_timer_needed(void)
101
{
102
  /* timer is off but needed again? */
103
  if (!tcpip_tcp_timer_active && (tcp_active_pcbs || tcp_tw_pcbs)) {
104
    /* enable and start timer */
105
    tcpip_tcp_timer_active = 1;
106
    sys_timeout(TCP_TMR_INTERVAL, tcpip_tcp_timer, NULL);
107
  }
108
}
109
#endif /* !NO_SYS */
110
#endif /* LWIP_TCP */
111
 
112
#if IP_REASSEMBLY
113
/**
114
 * Timer callback function that calls ip_reass_tmr() and reschedules itself.
115
 *
116
 * @param arg unused argument
117
 */
118
static void
119
ip_reass_timer(void *arg)
120
{
121
  LWIP_UNUSED_ARG(arg);
122
  LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: ip_reass_tmr()\n"));
123
  ip_reass_tmr();
124
  sys_timeout(IP_TMR_INTERVAL, ip_reass_timer, NULL);
125
}
126
#endif /* IP_REASSEMBLY */
127
 
128
#if LWIP_ARP
129
/**
130
 * Timer callback function that calls etharp_tmr() and reschedules itself.
131
 *
132
 * @param arg unused argument
133
 */
134
static void
135
arp_timer(void *arg)
136
{
137
  LWIP_UNUSED_ARG(arg);
138
  LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: etharp_tmr()\n"));
139
  etharp_tmr();
140
  sys_timeout(ARP_TMR_INTERVAL, arp_timer, NULL);
141
}
142
#endif /* LWIP_ARP */
143
 
144
#if LWIP_DHCP
145
/**
146
 * Timer callback function that calls dhcp_coarse_tmr() and reschedules itself.
147
 *
148
 * @param arg unused argument
149
 */
150
static void
151
dhcp_timer_coarse(void *arg)
152
{
153
  LWIP_UNUSED_ARG(arg);
154
  LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: dhcp_coarse_tmr()\n"));
155
  dhcp_coarse_tmr();
156
  sys_timeout(DHCP_COARSE_TIMER_MSECS, dhcp_timer_coarse, NULL);
157
}
158
 
159
/**
160
 * Timer callback function that calls dhcp_fine_tmr() and reschedules itself.
161
 *
162
 * @param arg unused argument
163
 */
164
static void
165
dhcp_timer_fine(void *arg)
166
{
167
  LWIP_UNUSED_ARG(arg);
168
  LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: dhcp_fine_tmr()\n"));
169
  dhcp_fine_tmr();
170
  sys_timeout(DHCP_FINE_TIMER_MSECS, dhcp_timer_fine, NULL);
171
}
172
#endif /* LWIP_DHCP */
173
 
174
#if LWIP_AUTOIP
175
/**
176
 * Timer callback function that calls autoip_tmr() and reschedules itself.
177
 *
178
 * @param arg unused argument
179
 */
180
static void
181
autoip_timer(void *arg)
182
{
183
  LWIP_UNUSED_ARG(arg);
184
  LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: autoip_tmr()\n"));
185
  autoip_tmr();
186
  sys_timeout(AUTOIP_TMR_INTERVAL, autoip_timer, NULL);
187
}
188
#endif /* LWIP_AUTOIP */
189
 
190
#if LWIP_IGMP
191
/**
192
 * Timer callback function that calls igmp_tmr() and reschedules itself.
193
 *
194
 * @param arg unused argument
195
 */
196
static void
197
igmp_timer(void *arg)
198
{
199
  LWIP_UNUSED_ARG(arg);
200
  LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: igmp_tmr()\n"));
201
  igmp_tmr();
202
  sys_timeout(IGMP_TMR_INTERVAL, igmp_timer, NULL);
203
}
204
#endif /* LWIP_IGMP */
205
 
206
#if LWIP_DNS
207
/**
208
 * Timer callback function that calls dns_tmr() and reschedules itself.
209
 *
210
 * @param arg unused argument
211
 */
212
static void
213
dns_timer(void *arg)
214
{
215
  LWIP_UNUSED_ARG(arg);
216
  LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip: dns_tmr()\n"));
217
  dns_tmr();
218
  sys_timeout(DNS_TMR_INTERVAL, dns_timer, NULL);
219
}
220
#endif /* LWIP_DNS */
221
 
222
/**
223
 * The main lwIP thread. This thread has exclusive access to lwIP core functions
224
 * (unless access to them is not locked). Other threads communicate with this
225
 * thread using message boxes.
226
 *
227
 * It also starts all the timers to make sure they are running in the right
228
 * thread context.
229
 *
230
 * @param arg unused argument
231
 */
232
static void
233
tcpip_thread(void *arg)
234
{
235
  struct tcpip_msg *msg;
236
  LWIP_UNUSED_ARG(arg);
237
 
238
#if IP_REASSEMBLY
239
  sys_timeout(IP_TMR_INTERVAL, ip_reass_timer, NULL);
240
#endif /* IP_REASSEMBLY */
241
#if LWIP_ARP
242
  sys_timeout(ARP_TMR_INTERVAL, arp_timer, NULL);
243
#endif /* LWIP_ARP */
244
#if LWIP_DHCP
245
  sys_timeout(DHCP_COARSE_TIMER_MSECS, dhcp_timer_coarse, NULL);
246
  sys_timeout(DHCP_FINE_TIMER_MSECS, dhcp_timer_fine, NULL);
247
#endif /* LWIP_DHCP */
248
#if LWIP_AUTOIP
249
  sys_timeout(AUTOIP_TMR_INTERVAL, autoip_timer, NULL);
250
#endif /* LWIP_AUTOIP */
251
#if LWIP_IGMP
252
  sys_timeout(IGMP_TMR_INTERVAL, igmp_timer, NULL);
253
#endif /* LWIP_IGMP */
254
#if LWIP_DNS
255
  sys_timeout(DNS_TMR_INTERVAL, dns_timer, NULL);
256
#endif /* LWIP_DNS */
257
 
258
  if (tcpip_init_done != NULL) {
259
    tcpip_init_done(tcpip_init_done_arg);
260
  }
261
 
262
  LOCK_TCPIP_CORE();
263
  while (1) {                          /* MAIN Loop */
264
    sys_mbox_fetch(mbox, (void *)&msg);
265
    switch (msg->type) {
266
#if LWIP_NETCONN
267
    case TCPIP_MSG_API:
268
      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: API message %p\n", (void *)msg));
269
      msg->msg.apimsg->function(&(msg->msg.apimsg->msg));
270
      break;
271
#endif /* LWIP_NETCONN */
272
 
273
    case TCPIP_MSG_INPKT:
274
      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: PACKET %p\n", (void *)msg));
275
#if LWIP_ARP
276
      if (msg->msg.inp.netif->flags & NETIF_FLAG_ETHARP) {
277
        ethernet_input(msg->msg.inp.p, msg->msg.inp.netif);
278
      } else
279
#endif /* LWIP_ARP */
280
      { ip_input(msg->msg.inp.p, msg->msg.inp.netif);
281
      }
282
      memp_free(MEMP_TCPIP_MSG_INPKT, msg);
283
      break;
284
 
285
#if LWIP_NETIF_API
286
    case TCPIP_MSG_NETIFAPI:
287
      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: Netif API message %p\n", (void *)msg));
288
      msg->msg.netifapimsg->function(&(msg->msg.netifapimsg->msg));
289
      break;
290
#endif /* LWIP_NETIF_API */
291
 
292
    case TCPIP_MSG_CALLBACK:
293
      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: CALLBACK %p\n", (void *)msg));
294
      msg->msg.cb.f(msg->msg.cb.ctx);
295
      memp_free(MEMP_TCPIP_MSG_API, msg);
296
      break;
297
 
298
    case TCPIP_MSG_TIMEOUT:
299
      LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: TIMEOUT %p\n", (void *)msg));
300
 
301
      if(msg->msg.tmo.msecs != 0xffffffff)
302
        sys_timeout (msg->msg.tmo.msecs, msg->msg.tmo.h, msg->msg.tmo.arg);
303
      else
304
        sys_untimeout (msg->msg.tmo.h, msg->msg.tmo.arg);
305
      memp_free(MEMP_TCPIP_MSG_API, msg);
306
      break;
307
 
308
    default:
309
      break;
310
    }
311
  }
312
}
313
 
314
/**
315
 * Pass a received packet to tcpip_thread for input processing
316
 *
317
 * @param p the received packet, p->payload pointing to the Ethernet header or
318
 *          to an IP header (if netif doesn't got NETIF_FLAG_ETHARP flag)
319
 * @param inp the network interface on which the packet was received
320
 */
321
err_t
322
tcpip_input(struct pbuf *p, struct netif *inp)
323
{
324
  struct tcpip_msg *msg;
325
 
326
  if (mbox != SYS_MBOX_NULL) {
327
    msg = memp_malloc(MEMP_TCPIP_MSG_INPKT);
328
    if (msg == NULL) {
329
      return ERR_MEM;
330
    }
331
 
332
    msg->type = TCPIP_MSG_INPKT;
333
    msg->msg.inp.p = p;
334
    msg->msg.inp.netif = inp;
335
    if (sys_mbox_trypost(mbox, msg) != ERR_OK) {
336
      memp_free(MEMP_TCPIP_MSG_INPKT, msg);
337
      return ERR_MEM;
338
    }
339
    return ERR_OK;
340
  }
341
  return ERR_VAL;
342
}
343
 
344
/**
345
 * Call a specific function in the thread context of
346
 * tcpip_thread for easy access synchronization.
347
 * A function called in that way may access lwIP core code
348
 * without fearing concurrent access.
349
 *
350
 * @param f the function to call
351
 * @param ctx parameter passed to f
352
 * @param block 1 to block until the request is posted, 0 to non-blocking mode
353
 * @return ERR_OK if the function was called, another err_t if not
354
 */
355
err_t
356
tcpip_callback_with_block(void (*f)(void *ctx), void *ctx, u8_t block)
357
{
358
  struct tcpip_msg *msg;
359
 
360
  if (mbox != SYS_MBOX_NULL) {
361
    msg = memp_malloc(MEMP_TCPIP_MSG_API);
362
    if (msg == NULL) {
363
      return ERR_MEM;
364
    }
365
 
366
    msg->type = TCPIP_MSG_CALLBACK;
367
    msg->msg.cb.f = f;
368
    msg->msg.cb.ctx = ctx;
369
    if (block) {
370
      sys_mbox_post(mbox, msg);
371
    } else {
372
      if (sys_mbox_trypost(mbox, msg) != ERR_OK) {
373
        memp_free(MEMP_TCPIP_MSG_API, msg);
374
        return ERR_MEM;
375
      }
376
    }
377
    return ERR_OK;
378
  }
379
  return ERR_VAL;
380
}
381
 
382
err_t
383
tcpip_timeout(u32_t msecs, sys_timeout_handler h, void *arg)
384
{
385
  struct tcpip_msg *msg;
386
 
387
  if (mbox != SYS_MBOX_NULL) {
388
    msg = memp_malloc(MEMP_TCPIP_MSG_API);
389
    if (msg == NULL) {
390
      return ERR_MEM;
391
    }
392
 
393
    msg->type = TCPIP_MSG_TIMEOUT;
394
    msg->msg.tmo.msecs = msecs;
395
    msg->msg.tmo.h = h;
396
    msg->msg.tmo.arg = arg;
397
    sys_mbox_post(mbox, msg);
398
    return ERR_OK;
399
  }
400
  return ERR_VAL;
401
}
402
 
403
#if LWIP_NETCONN
404
/**
405
 * Call the lower part of a netconn_* function
406
 * This function is then running in the thread context
407
 * of tcpip_thread and has exclusive access to lwIP core code.
408
 *
409
 * @param apimsg a struct containing the function to call and its parameters
410
 * @return ERR_OK if the function was called, another err_t if not
411
 */
412
err_t
413
tcpip_apimsg(struct api_msg *apimsg)
414
{
415
  struct tcpip_msg msg;
416
 
417
  if (mbox != SYS_MBOX_NULL) {
418
    msg.type = TCPIP_MSG_API;
419
    msg.msg.apimsg = apimsg;
420
    sys_mbox_post(mbox, &msg);
421
    sys_arch_sem_wait(apimsg->msg.conn->op_completed, 0);
422
    return ERR_OK;
423
  }
424
  return ERR_VAL;
425
}
426
 
427
#if LWIP_TCPIP_CORE_LOCKING
428
/**
429
 * Call the lower part of a netconn_* function
430
 * This function has exclusive access to lwIP core code by locking it
431
 * before the function is called.
432
 *
433
 * @param apimsg a struct containing the function to call and its parameters
434
 * @return ERR_OK (only for compatibility fo tcpip_apimsg())
435
 */
436
err_t
437
tcpip_apimsg_lock(struct api_msg *apimsg)
438
{
439
  LOCK_TCPIP_CORE();
440
  apimsg->function(&(apimsg->msg));
441
  UNLOCK_TCPIP_CORE();
442
  return ERR_OK;
443
 
444
}
445
#endif /* LWIP_TCPIP_CORE_LOCKING */
446
#endif /* LWIP_NETCONN */
447
 
448
#if LWIP_NETIF_API
449
#if !LWIP_TCPIP_CORE_LOCKING
450
/**
451
 * Much like tcpip_apimsg, but calls the lower part of a netifapi_*
452
 * function.
453
 *
454
 * @param netifapimsg a struct containing the function to call and its parameters
455
 * @return error code given back by the function that was called
456
 */
457
err_t
458
tcpip_netifapi(struct netifapi_msg* netifapimsg)
459
{
460
  struct tcpip_msg msg;
461
 
462
  if (mbox != SYS_MBOX_NULL) {
463
    netifapimsg->msg.sem = sys_sem_new(0);
464
    if (netifapimsg->msg.sem == SYS_SEM_NULL) {
465
      netifapimsg->msg.err = ERR_MEM;
466
      return netifapimsg->msg.err;
467
    }
468
 
469
    msg.type = TCPIP_MSG_NETIFAPI;
470
    msg.msg.netifapimsg = netifapimsg;
471
    sys_mbox_post(mbox, &msg);
472
    sys_sem_wait(netifapimsg->msg.sem);
473
    sys_sem_free(netifapimsg->msg.sem);
474
    return netifapimsg->msg.err;
475
  }
476
  return ERR_VAL;
477
}
478
#else /* !LWIP_TCPIP_CORE_LOCKING */
479
/**
480
 * Call the lower part of a netifapi_* function
481
 * This function has exclusive access to lwIP core code by locking it
482
 * before the function is called.
483
 *
484
 * @param netifapimsg a struct containing the function to call and its parameters
485
 * @return ERR_OK (only for compatibility fo tcpip_netifapi())
486
 */
487
err_t
488
tcpip_netifapi_lock(struct netifapi_msg* netifapimsg)
489
{
490
  LOCK_TCPIP_CORE();
491
  netifapimsg->function(&(netifapimsg->msg));
492
  UNLOCK_TCPIP_CORE();
493
  return netifapimsg->msg.err;
494
}
495
#endif /* !LWIP_TCPIP_CORE_LOCKING */
496
#endif /* LWIP_NETIF_API */
497
 
498
/**
499
 * Initialize this module:
500
 * - initialize all sub modules
501
 * - start the tcpip_thread
502
 *
503
 * @param initfunc a function to call when tcpip_thread is running and finished initializing
504
 * @param arg argument to pass to initfunc
505
 */
506
void
507
tcpip_init(void (* initfunc)(void *), void *arg)
508
{
509
  lwip_init();
510
 
511
  tcpip_init_done = initfunc;
512
  tcpip_init_done_arg = arg;
513
  mbox = sys_mbox_new(TCPIP_MBOX_SIZE);
514
#if LWIP_TCPIP_CORE_LOCKING
515
  lock_tcpip_core = sys_sem_new(1);
516
#endif /* LWIP_TCPIP_CORE_LOCKING */
517
 
518
  sys_thread_new(TCPIP_THREAD_NAME, tcpip_thread, NULL, TCPIP_THREAD_STACKSIZE, TCPIP_THREAD_PRIO);
519
}
520
 
521
#endif /* !NO_SYS */

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