Travis Geiselbrecht | 1d0df69 | 2008-09-01 02:26:09 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without modification, |
| 6 | * are permitted provided that the following conditions are met: |
| 7 | * |
| 8 | * 1. Redistributions of source code must retain the above copyright notice, |
| 9 | * this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| 11 | * this list of conditions and the following disclaimer in the documentation |
| 12 | * and/or other materials provided with the distribution. |
| 13 | * 3. The name of the author may not be used to endorse or promote products |
| 14 | * derived from this software without specific prior written permission. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 18 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT |
| 19 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 20 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT |
| 21 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 22 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 23 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 24 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY |
| 25 | * OF SUCH DAMAGE. |
| 26 | * |
| 27 | * This file is part of the lwIP TCP/IP stack. |
| 28 | * |
| 29 | * Author: Adam Dunkels <adam@sics.se> |
| 30 | * |
| 31 | */ |
| 32 | |
| 33 | /* This is the part of the API that is linked with |
| 34 | the application */ |
| 35 | |
| 36 | #include "lwip/opt.h" |
| 37 | #include "lwip/api.h" |
| 38 | #include "lwip/api_msg.h" |
| 39 | #include "lwip/memp.h" |
| 40 | |
| 41 | |
| 42 | struct |
| 43 | netbuf *netbuf_new(void) |
| 44 | { |
| 45 | struct netbuf *buf; |
| 46 | |
| 47 | buf = memp_malloc(MEMP_NETBUF); |
| 48 | if (buf != NULL) { |
| 49 | buf->p = NULL; |
| 50 | buf->ptr = NULL; |
| 51 | return buf; |
| 52 | } else { |
| 53 | return NULL; |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | void |
| 58 | netbuf_delete(struct netbuf *buf) |
| 59 | { |
| 60 | if (buf != NULL) { |
| 61 | if (buf->p != NULL) { |
| 62 | pbuf_free(buf->p); |
| 63 | buf->p = buf->ptr = NULL; |
| 64 | } |
| 65 | memp_free(MEMP_NETBUF, buf); |
| 66 | } |
| 67 | } |
| 68 | |
| 69 | void * |
| 70 | netbuf_alloc(struct netbuf *buf, u16_t size) |
| 71 | { |
| 72 | /* Deallocate any previously allocated memory. */ |
| 73 | if (buf->p != NULL) { |
| 74 | pbuf_free(buf->p); |
| 75 | } |
| 76 | buf->p = pbuf_alloc(PBUF_TRANSPORT, size, PBUF_RAM); |
| 77 | if (buf->p == NULL) { |
| 78 | return NULL; |
| 79 | } |
| 80 | buf->ptr = buf->p; |
| 81 | return buf->p->payload; |
| 82 | } |
| 83 | |
| 84 | void |
| 85 | netbuf_free(struct netbuf *buf) |
| 86 | { |
| 87 | if (buf->p != NULL) { |
| 88 | pbuf_free(buf->p); |
| 89 | } |
| 90 | buf->p = buf->ptr = NULL; |
| 91 | } |
| 92 | |
| 93 | void |
| 94 | netbuf_ref(struct netbuf *buf, void *dataptr, u16_t size) |
| 95 | { |
| 96 | if (buf->p != NULL) { |
| 97 | pbuf_free(buf->p); |
| 98 | } |
| 99 | buf->p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_REF); |
| 100 | buf->p->payload = dataptr; |
| 101 | buf->p->len = buf->p->tot_len = size; |
| 102 | buf->ptr = buf->p; |
| 103 | } |
| 104 | |
| 105 | void |
| 106 | netbuf_chain(struct netbuf *head, struct netbuf *tail) |
| 107 | { |
| 108 | pbuf_chain(head->p, tail->p); |
| 109 | head->ptr = head->p; |
| 110 | memp_free(MEMP_NETBUF, tail); |
| 111 | } |
| 112 | |
| 113 | u16_t |
| 114 | netbuf_len(struct netbuf *buf) |
| 115 | { |
| 116 | return buf->p->tot_len; |
| 117 | } |
| 118 | |
| 119 | err_t |
| 120 | netbuf_data(struct netbuf *buf, void **dataptr, u16_t *len) |
| 121 | { |
| 122 | if (buf->ptr == NULL) { |
| 123 | return ERR_BUF; |
| 124 | } |
| 125 | *dataptr = buf->ptr->payload; |
| 126 | *len = buf->ptr->len; |
| 127 | return ERR_OK; |
| 128 | } |
| 129 | |
| 130 | s8_t |
| 131 | netbuf_next(struct netbuf *buf) |
| 132 | { |
| 133 | if (buf->ptr->next == NULL) { |
| 134 | return -1; |
| 135 | } |
| 136 | buf->ptr = buf->ptr->next; |
| 137 | if (buf->ptr->next == NULL) { |
| 138 | return 1; |
| 139 | } |
| 140 | return 0; |
| 141 | } |
| 142 | |
| 143 | void |
| 144 | netbuf_first(struct netbuf *buf) |
| 145 | { |
| 146 | buf->ptr = buf->p; |
| 147 | } |
| 148 | |
| 149 | void |
| 150 | netbuf_copy_partial(struct netbuf *buf, void *dataptr, u16_t len, u16_t offset) |
| 151 | { |
| 152 | struct pbuf *p; |
| 153 | u16_t i, left; |
| 154 | |
| 155 | left = 0; |
| 156 | |
| 157 | if(buf == NULL || dataptr == NULL) { |
| 158 | return; |
| 159 | } |
| 160 | |
| 161 | /* This implementation is bad. It should use bcopy |
| 162 | instead. */ |
| 163 | for(p = buf->p; left < len && p != NULL; p = p->next) { |
| 164 | if (offset != 0 && offset >= p->len) { |
| 165 | offset -= p->len; |
| 166 | } else { |
| 167 | for(i = offset; i < p->len; ++i) { |
| 168 | ((u8_t *)dataptr)[left] = ((u8_t *)p->payload)[i]; |
| 169 | if (++left >= len) { |
| 170 | return; |
| 171 | } |
| 172 | } |
| 173 | offset = 0; |
| 174 | } |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | void |
| 179 | netbuf_copy(struct netbuf *buf, void *dataptr, u16_t len) |
| 180 | { |
| 181 | netbuf_copy_partial(buf, dataptr, len, 0); |
| 182 | } |
| 183 | |
| 184 | struct ip_addr * |
| 185 | netbuf_fromaddr(struct netbuf *buf) |
| 186 | { |
| 187 | return buf->fromaddr; |
| 188 | } |
| 189 | |
| 190 | u16_t |
| 191 | netbuf_fromport(struct netbuf *buf) |
| 192 | { |
| 193 | return buf->fromport; |
| 194 | } |
| 195 | |
| 196 | struct |
| 197 | netconn *netconn_new_with_proto_and_callback(enum netconn_type t, u16_t proto, |
| 198 | void (*callback)(struct netconn *, enum netconn_evt, u16_t len)) |
| 199 | { |
| 200 | struct netconn *conn; |
| 201 | struct api_msg *msg; |
| 202 | |
| 203 | conn = memp_malloc(MEMP_NETCONN); |
| 204 | if (conn == NULL) { |
| 205 | return NULL; |
| 206 | } |
| 207 | |
| 208 | conn->err = ERR_OK; |
| 209 | conn->type = t; |
| 210 | conn->pcb.tcp = NULL; |
| 211 | |
| 212 | if ((conn->mbox = sys_mbox_new()) == SYS_MBOX_NULL) { |
| 213 | memp_free(MEMP_NETCONN, conn); |
| 214 | return NULL; |
| 215 | } |
| 216 | conn->recvmbox = SYS_MBOX_NULL; |
| 217 | conn->acceptmbox = SYS_MBOX_NULL; |
| 218 | conn->sem = SYS_SEM_NULL; |
| 219 | conn->state = NETCONN_NONE; |
| 220 | conn->socket = 0; |
| 221 | conn->callback = callback; |
| 222 | conn->recv_avail = 0; |
| 223 | |
| 224 | if((msg = memp_malloc(MEMP_API_MSG)) == NULL) { |
| 225 | memp_free(MEMP_NETCONN, conn); |
| 226 | return NULL; |
| 227 | } |
| 228 | |
| 229 | msg->type = API_MSG_NEWCONN; |
| 230 | msg->msg.msg.bc.port = proto; /* misusing the port field */ |
| 231 | msg->msg.conn = conn; |
| 232 | api_msg_post(msg); |
| 233 | sys_mbox_fetch(conn->mbox, NULL); |
| 234 | memp_free(MEMP_API_MSG, msg); |
| 235 | |
| 236 | if ( conn->err != ERR_OK ) { |
| 237 | memp_free(MEMP_NETCONN, conn); |
| 238 | return NULL; |
| 239 | } |
| 240 | |
| 241 | return conn; |
| 242 | } |
| 243 | |
| 244 | |
| 245 | struct |
| 246 | netconn *netconn_new(enum netconn_type t) |
| 247 | { |
| 248 | return netconn_new_with_proto_and_callback(t,0,NULL); |
| 249 | } |
| 250 | |
| 251 | struct |
| 252 | netconn *netconn_new_with_callback(enum netconn_type t, |
| 253 | void (*callback)(struct netconn *, enum netconn_evt, u16_t len)) |
| 254 | { |
| 255 | return netconn_new_with_proto_and_callback(t,0,callback); |
| 256 | } |
| 257 | |
| 258 | |
| 259 | err_t |
| 260 | netconn_delete(struct netconn *conn) |
| 261 | { |
| 262 | struct api_msg *msg; |
| 263 | void *mem; |
| 264 | |
| 265 | if (conn == NULL) { |
| 266 | return ERR_OK; |
| 267 | } |
| 268 | |
| 269 | if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) { |
| 270 | return ERR_MEM; |
| 271 | } |
| 272 | |
| 273 | msg->type = API_MSG_DELCONN; |
| 274 | msg->msg.conn = conn; |
| 275 | api_msg_post(msg); |
| 276 | sys_mbox_fetch(conn->mbox, NULL); |
| 277 | memp_free(MEMP_API_MSG, msg); |
| 278 | |
| 279 | /* Drain the recvmbox. */ |
| 280 | if (conn->recvmbox != SYS_MBOX_NULL) { |
| 281 | while (sys_arch_mbox_fetch(conn->recvmbox, &mem, 1) != SYS_ARCH_TIMEOUT) { |
| 282 | if (conn->type == NETCONN_TCP) { |
| 283 | if(mem != NULL) |
| 284 | pbuf_free((struct pbuf *)mem); |
| 285 | } else { |
| 286 | netbuf_delete((struct netbuf *)mem); |
| 287 | } |
| 288 | } |
| 289 | sys_mbox_free(conn->recvmbox); |
| 290 | conn->recvmbox = SYS_MBOX_NULL; |
| 291 | } |
| 292 | |
| 293 | |
| 294 | /* Drain the acceptmbox. */ |
| 295 | if (conn->acceptmbox != SYS_MBOX_NULL) { |
| 296 | while (sys_arch_mbox_fetch(conn->acceptmbox, &mem, 1) != SYS_ARCH_TIMEOUT) { |
| 297 | netconn_delete((struct netconn *)mem); |
| 298 | } |
| 299 | |
| 300 | sys_mbox_free(conn->acceptmbox); |
| 301 | conn->acceptmbox = SYS_MBOX_NULL; |
| 302 | } |
| 303 | |
| 304 | sys_mbox_free(conn->mbox); |
| 305 | conn->mbox = SYS_MBOX_NULL; |
| 306 | if (conn->sem != SYS_SEM_NULL) { |
| 307 | sys_sem_free(conn->sem); |
| 308 | } |
| 309 | /* conn->sem = SYS_SEM_NULL;*/ |
| 310 | memp_free(MEMP_NETCONN, conn); |
| 311 | return ERR_OK; |
| 312 | } |
| 313 | |
| 314 | enum netconn_type |
| 315 | netconn_type(struct netconn *conn) |
| 316 | { |
| 317 | return conn->type; |
| 318 | } |
| 319 | |
| 320 | err_t |
| 321 | netconn_peer(struct netconn *conn, struct ip_addr *addr, |
| 322 | u16_t *port) |
| 323 | { |
| 324 | switch (conn->type) { |
| 325 | case NETCONN_RAW: |
| 326 | /* return an error as connecting is only a helper for upper layers */ |
| 327 | return ERR_CONN; |
| 328 | case NETCONN_UDPLITE: |
| 329 | case NETCONN_UDPNOCHKSUM: |
| 330 | case NETCONN_UDP: |
| 331 | if (conn->pcb.udp == NULL || |
| 332 | ((conn->pcb.udp->flags & UDP_FLAGS_CONNECTED) == 0)) |
| 333 | return ERR_CONN; |
| 334 | *addr = (conn->pcb.udp->remote_ip); |
| 335 | *port = conn->pcb.udp->remote_port; |
| 336 | break; |
| 337 | case NETCONN_TCP: |
| 338 | if (conn->pcb.tcp == NULL) |
| 339 | return ERR_CONN; |
| 340 | *addr = (conn->pcb.tcp->remote_ip); |
| 341 | *port = conn->pcb.tcp->remote_port; |
| 342 | break; |
| 343 | } |
| 344 | return (conn->err = ERR_OK); |
| 345 | } |
| 346 | |
| 347 | err_t |
| 348 | netconn_addr(struct netconn *conn, struct ip_addr **addr, |
| 349 | u16_t *port) |
| 350 | { |
| 351 | switch (conn->type) { |
| 352 | case NETCONN_RAW: |
| 353 | *addr = &(conn->pcb.raw->local_ip); |
| 354 | *port = conn->pcb.raw->protocol; |
| 355 | break; |
| 356 | case NETCONN_UDPLITE: |
| 357 | case NETCONN_UDPNOCHKSUM: |
| 358 | case NETCONN_UDP: |
| 359 | *addr = &(conn->pcb.udp->local_ip); |
| 360 | *port = conn->pcb.udp->local_port; |
| 361 | break; |
| 362 | case NETCONN_TCP: |
| 363 | *addr = &(conn->pcb.tcp->local_ip); |
| 364 | *port = conn->pcb.tcp->local_port; |
| 365 | break; |
| 366 | } |
| 367 | return (conn->err = ERR_OK); |
| 368 | } |
| 369 | |
| 370 | err_t |
| 371 | netconn_bind(struct netconn *conn, struct ip_addr *addr, |
| 372 | u16_t port) |
| 373 | { |
| 374 | struct api_msg *msg; |
| 375 | |
| 376 | if (conn == NULL) { |
| 377 | return ERR_VAL; |
| 378 | } |
| 379 | |
| 380 | if (conn->type != NETCONN_TCP && |
| 381 | conn->recvmbox == SYS_MBOX_NULL) { |
| 382 | if ((conn->recvmbox = sys_mbox_new()) == SYS_MBOX_NULL) { |
| 383 | return ERR_MEM; |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) { |
| 388 | return (conn->err = ERR_MEM); |
| 389 | } |
| 390 | msg->type = API_MSG_BIND; |
| 391 | msg->msg.conn = conn; |
| 392 | msg->msg.msg.bc.ipaddr = addr; |
| 393 | msg->msg.msg.bc.port = port; |
| 394 | api_msg_post(msg); |
| 395 | sys_mbox_fetch(conn->mbox, NULL); |
| 396 | memp_free(MEMP_API_MSG, msg); |
| 397 | return conn->err; |
| 398 | } |
| 399 | |
| 400 | |
| 401 | err_t |
| 402 | netconn_connect(struct netconn *conn, struct ip_addr *addr, |
| 403 | u16_t port) |
| 404 | { |
| 405 | struct api_msg *msg; |
| 406 | |
| 407 | if (conn == NULL) { |
| 408 | return ERR_VAL; |
| 409 | } |
| 410 | |
| 411 | |
| 412 | if (conn->recvmbox == SYS_MBOX_NULL) { |
| 413 | if ((conn->recvmbox = sys_mbox_new()) == SYS_MBOX_NULL) { |
| 414 | return ERR_MEM; |
| 415 | } |
| 416 | } |
| 417 | |
| 418 | if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) { |
| 419 | return ERR_MEM; |
| 420 | } |
| 421 | msg->type = API_MSG_CONNECT; |
| 422 | msg->msg.conn = conn; |
| 423 | msg->msg.msg.bc.ipaddr = addr; |
| 424 | msg->msg.msg.bc.port = port; |
| 425 | api_msg_post(msg); |
| 426 | sys_mbox_fetch(conn->mbox, NULL); |
| 427 | memp_free(MEMP_API_MSG, msg); |
| 428 | return conn->err; |
| 429 | } |
| 430 | |
| 431 | err_t |
| 432 | netconn_disconnect(struct netconn *conn) |
| 433 | { |
| 434 | struct api_msg *msg; |
| 435 | |
| 436 | if (conn == NULL) { |
| 437 | return ERR_VAL; |
| 438 | } |
| 439 | |
| 440 | if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) { |
| 441 | return ERR_MEM; |
| 442 | } |
| 443 | msg->type = API_MSG_DISCONNECT; |
| 444 | msg->msg.conn = conn; |
| 445 | api_msg_post(msg); |
| 446 | sys_mbox_fetch(conn->mbox, NULL); |
| 447 | memp_free(MEMP_API_MSG, msg); |
| 448 | return conn->err; |
| 449 | |
| 450 | } |
| 451 | |
| 452 | err_t |
| 453 | netconn_listen(struct netconn *conn) |
| 454 | { |
| 455 | struct api_msg *msg; |
| 456 | |
| 457 | if (conn == NULL) { |
| 458 | return ERR_VAL; |
| 459 | } |
| 460 | |
| 461 | if (conn->acceptmbox == SYS_MBOX_NULL) { |
| 462 | conn->acceptmbox = sys_mbox_new(); |
| 463 | if (conn->acceptmbox == SYS_MBOX_NULL) { |
| 464 | return ERR_MEM; |
| 465 | } |
| 466 | } |
| 467 | |
| 468 | if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) { |
| 469 | return (conn->err = ERR_MEM); |
| 470 | } |
| 471 | msg->type = API_MSG_LISTEN; |
| 472 | msg->msg.conn = conn; |
| 473 | api_msg_post(msg); |
| 474 | sys_mbox_fetch(conn->mbox, NULL); |
| 475 | memp_free(MEMP_API_MSG, msg); |
| 476 | return conn->err; |
| 477 | } |
| 478 | |
| 479 | struct netconn * |
| 480 | netconn_accept(struct netconn *conn) |
| 481 | { |
| 482 | struct netconn *newconn; |
| 483 | |
| 484 | if (conn == NULL) { |
| 485 | return NULL; |
| 486 | } |
| 487 | |
| 488 | sys_mbox_fetch(conn->acceptmbox, (void **)&newconn); |
| 489 | /* Register event with callback */ |
| 490 | if (conn->callback) |
| 491 | (*conn->callback)(conn, NETCONN_EVT_RCVMINUS, 0); |
| 492 | |
| 493 | return newconn; |
| 494 | } |
| 495 | |
| 496 | struct netbuf * |
| 497 | netconn_recv(struct netconn *conn) |
| 498 | { |
| 499 | struct api_msg *msg; |
| 500 | struct netbuf *buf; |
| 501 | struct pbuf *p; |
| 502 | u16_t len; |
| 503 | |
| 504 | if (conn == NULL) { |
| 505 | return NULL; |
| 506 | } |
| 507 | |
| 508 | if (conn->recvmbox == SYS_MBOX_NULL) { |
| 509 | conn->err = ERR_CONN; |
| 510 | return NULL; |
| 511 | } |
| 512 | |
| 513 | if (conn->err != ERR_OK) { |
| 514 | return NULL; |
| 515 | } |
| 516 | |
| 517 | if (conn->type == NETCONN_TCP) { |
| 518 | if (conn->pcb.tcp->state == LISTEN) { |
| 519 | conn->err = ERR_CONN; |
| 520 | return NULL; |
| 521 | } |
| 522 | |
| 523 | |
| 524 | buf = memp_malloc(MEMP_NETBUF); |
| 525 | |
| 526 | if (buf == NULL) { |
| 527 | conn->err = ERR_MEM; |
| 528 | return NULL; |
| 529 | } |
| 530 | |
| 531 | sys_mbox_fetch(conn->recvmbox, (void **)&p); |
| 532 | |
| 533 | if (p != NULL) |
| 534 | { |
| 535 | len = p->tot_len; |
| 536 | conn->recv_avail -= len; |
| 537 | } |
| 538 | else |
| 539 | len = 0; |
| 540 | |
| 541 | /* Register event with callback */ |
| 542 | if (conn->callback) |
| 543 | (*conn->callback)(conn, NETCONN_EVT_RCVMINUS, len); |
| 544 | |
| 545 | /* If we are closed, we indicate that we no longer wish to receive |
| 546 | data by setting conn->recvmbox to SYS_MBOX_NULL. */ |
| 547 | if (p == NULL) { |
| 548 | memp_free(MEMP_NETBUF, buf); |
| 549 | sys_mbox_free(conn->recvmbox); |
| 550 | conn->recvmbox = SYS_MBOX_NULL; |
| 551 | return NULL; |
| 552 | } |
| 553 | |
| 554 | buf->p = p; |
| 555 | buf->ptr = p; |
| 556 | buf->fromport = 0; |
| 557 | buf->fromaddr = NULL; |
| 558 | |
| 559 | /* Let the stack know that we have taken the data. */ |
| 560 | if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) { |
| 561 | conn->err = ERR_MEM; |
| 562 | return buf; |
| 563 | } |
| 564 | msg->type = API_MSG_RECV; |
| 565 | msg->msg.conn = conn; |
| 566 | if (buf != NULL) { |
| 567 | msg->msg.msg.len = buf->p->tot_len; |
| 568 | } else { |
| 569 | msg->msg.msg.len = 1; |
| 570 | } |
| 571 | api_msg_post(msg); |
| 572 | |
| 573 | sys_mbox_fetch(conn->mbox, NULL); |
| 574 | memp_free(MEMP_API_MSG, msg); |
| 575 | } else { |
| 576 | sys_mbox_fetch(conn->recvmbox, (void **)&buf); |
| 577 | conn->recv_avail -= buf->p->tot_len; |
| 578 | /* Register event with callback */ |
| 579 | if (conn->callback) |
| 580 | (*conn->callback)(conn, NETCONN_EVT_RCVMINUS, buf->p->tot_len); |
| 581 | } |
| 582 | |
| 583 | |
| 584 | |
| 585 | |
| 586 | LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_recv: received %p (err %d)\n", (void *)buf, conn->err)); |
| 587 | |
| 588 | |
| 589 | return buf; |
| 590 | } |
| 591 | |
| 592 | err_t |
| 593 | netconn_send(struct netconn *conn, struct netbuf *buf) |
| 594 | { |
| 595 | struct api_msg *msg; |
| 596 | |
| 597 | if (conn == NULL) { |
| 598 | return ERR_VAL; |
| 599 | } |
| 600 | |
| 601 | if (conn->err != ERR_OK) { |
| 602 | return conn->err; |
| 603 | } |
| 604 | |
| 605 | if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) { |
| 606 | return (conn->err = ERR_MEM); |
| 607 | } |
| 608 | |
| 609 | LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_send: sending %d bytes\n", buf->p->tot_len)); |
| 610 | msg->type = API_MSG_SEND; |
| 611 | msg->msg.conn = conn; |
| 612 | msg->msg.msg.p = buf->p; |
| 613 | api_msg_post(msg); |
| 614 | |
| 615 | sys_mbox_fetch(conn->mbox, NULL); |
| 616 | memp_free(MEMP_API_MSG, msg); |
| 617 | return conn->err; |
| 618 | } |
| 619 | |
| 620 | err_t |
| 621 | netconn_write(struct netconn *conn, void *dataptr, u16_t size, u8_t copy) |
| 622 | { |
| 623 | struct api_msg *msg; |
| 624 | u16_t len; |
| 625 | |
| 626 | if (conn == NULL) { |
| 627 | return ERR_VAL; |
| 628 | } |
| 629 | |
| 630 | if (conn->err != ERR_OK) { |
| 631 | return conn->err; |
| 632 | } |
| 633 | |
| 634 | if (conn->sem == SYS_SEM_NULL) { |
| 635 | conn->sem = sys_sem_new(0); |
| 636 | if (conn->sem == SYS_SEM_NULL) { |
| 637 | return ERR_MEM; |
| 638 | } |
| 639 | } |
| 640 | |
| 641 | if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) { |
| 642 | return (conn->err = ERR_MEM); |
| 643 | } |
| 644 | msg->type = API_MSG_WRITE; |
| 645 | msg->msg.conn = conn; |
| 646 | |
| 647 | |
| 648 | conn->state = NETCONN_WRITE; |
| 649 | while (conn->err == ERR_OK && size > 0) { |
| 650 | msg->msg.msg.w.dataptr = dataptr; |
| 651 | msg->msg.msg.w.copy = copy; |
| 652 | |
| 653 | if (conn->type == NETCONN_TCP) { |
| 654 | if (tcp_sndbuf(conn->pcb.tcp) == 0) { |
| 655 | sys_sem_wait(conn->sem); |
| 656 | if (conn->err != ERR_OK) { |
| 657 | goto ret; |
| 658 | } |
| 659 | } |
| 660 | if (size > tcp_sndbuf(conn->pcb.tcp)) { |
| 661 | /* We cannot send more than one send buffer's worth of data at a |
| 662 | time. */ |
| 663 | len = tcp_sndbuf(conn->pcb.tcp); |
| 664 | } else { |
| 665 | len = size; |
| 666 | } |
| 667 | } else { |
| 668 | len = size; |
| 669 | } |
| 670 | |
| 671 | LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_write: writing %d bytes (%d)\n", len, copy)); |
| 672 | msg->msg.msg.w.len = len; |
| 673 | api_msg_post(msg); |
| 674 | sys_mbox_fetch(conn->mbox, NULL); |
| 675 | if (conn->err == ERR_OK) { |
| 676 | dataptr = (void *)((u8_t *)dataptr + len); |
| 677 | size -= len; |
| 678 | } else if (conn->err == ERR_MEM) { |
| 679 | conn->err = ERR_OK; |
| 680 | sys_sem_wait(conn->sem); |
| 681 | } else { |
| 682 | goto ret; |
| 683 | } |
| 684 | } |
| 685 | ret: |
| 686 | memp_free(MEMP_API_MSG, msg); |
| 687 | conn->state = NETCONN_NONE; |
| 688 | if (conn->sem != SYS_SEM_NULL) { |
| 689 | sys_sem_free(conn->sem); |
| 690 | conn->sem = SYS_SEM_NULL; |
| 691 | } |
| 692 | |
| 693 | return conn->err; |
| 694 | } |
| 695 | |
| 696 | err_t |
| 697 | netconn_close(struct netconn *conn) |
| 698 | { |
| 699 | struct api_msg *msg; |
| 700 | |
| 701 | if (conn == NULL) { |
| 702 | return ERR_VAL; |
| 703 | } |
| 704 | if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) { |
| 705 | return (conn->err = ERR_MEM); |
| 706 | } |
| 707 | |
| 708 | conn->state = NETCONN_CLOSE; |
| 709 | again: |
| 710 | msg->type = API_MSG_CLOSE; |
| 711 | msg->msg.conn = conn; |
| 712 | api_msg_post(msg); |
| 713 | sys_mbox_fetch(conn->mbox, NULL); |
| 714 | if (conn->err == ERR_MEM && |
| 715 | conn->sem != SYS_SEM_NULL) { |
| 716 | sys_sem_wait(conn->sem); |
| 717 | goto again; |
| 718 | } |
| 719 | conn->state = NETCONN_NONE; |
| 720 | memp_free(MEMP_API_MSG, msg); |
| 721 | return conn->err; |
| 722 | } |
| 723 | |
| 724 | err_t |
| 725 | netconn_err(struct netconn *conn) |
| 726 | { |
| 727 | return conn->err; |
| 728 | } |
| 729 | |