2 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
5 * Redistribution and use in source and binary forms, with or without modification,
6 * are permitted provided that the following conditions are met:
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.
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
27 * This file is part of the lwIP TCP/IP stack.
29 * Author: Adam Dunkels <adam@sics.se>
33 /* This is the part of the API that is linked with
38 #include "lwip/api_msg.h"
39 #include "lwip/memp.h"
43 netbuf *netbuf_new(void)
47 buf = memp_malloc(MEMP_NETBUF);
58 netbuf_delete(struct netbuf *buf)
63 buf->p = buf->ptr = NULL;
65 memp_free(MEMP_NETBUF, buf);
70 netbuf_alloc(struct netbuf *buf, u16_t size)
72 /* Deallocate any previously allocated memory. */
76 buf->p = pbuf_alloc(PBUF_TRANSPORT, size, PBUF_RAM);
81 return buf->p->payload;
85 netbuf_free(struct netbuf *buf)
90 buf->p = buf->ptr = NULL;
94 netbuf_ref(struct netbuf *buf, void *dataptr, u16_t size)
99 buf->p = pbuf_alloc(PBUF_TRANSPORT, 0, PBUF_REF);
100 buf->p->payload = dataptr;
101 buf->p->len = buf->p->tot_len = size;
106 netbuf_chain(struct netbuf *head, struct netbuf *tail)
108 pbuf_chain(head->p, tail->p);
110 memp_free(MEMP_NETBUF, tail);
114 netbuf_len(struct netbuf *buf)
116 return buf->p->tot_len;
120 netbuf_data(struct netbuf *buf, void **dataptr, u16_t *len)
122 if (buf->ptr == NULL) {
125 *dataptr = buf->ptr->payload;
126 *len = buf->ptr->len;
131 netbuf_next(struct netbuf *buf)
133 if (buf->ptr->next == NULL) {
136 buf->ptr = buf->ptr->next;
137 if (buf->ptr->next == NULL) {
144 netbuf_first(struct netbuf *buf)
150 netbuf_copy_partial(struct netbuf *buf, void *dataptr, u16_t len, u16_t offset)
157 if(buf == NULL || dataptr == NULL) {
161 /* This implementation is bad. It should use bcopy
163 for(p = buf->p; left < len && p != NULL; p = p->next) {
164 if (offset != 0 && offset >= p->len) {
167 for(i = offset; i < p->len; ++i) {
168 ((u8_t *)dataptr)[left] = ((u8_t *)p->payload)[i];
179 netbuf_copy(struct netbuf *buf, void *dataptr, u16_t len)
181 netbuf_copy_partial(buf, dataptr, len, 0);
185 netbuf_fromaddr(struct netbuf *buf)
187 return buf->fromaddr;
191 netbuf_fromport(struct netbuf *buf)
193 return buf->fromport;
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))
200 struct netconn *conn;
203 conn = memp_malloc(MEMP_NETCONN);
210 conn->pcb.tcp = NULL;
212 if ((conn->mbox = sys_mbox_new()) == SYS_MBOX_NULL) {
213 memp_free(MEMP_NETCONN, conn);
216 conn->recvmbox = SYS_MBOX_NULL;
217 conn->acceptmbox = SYS_MBOX_NULL;
218 conn->sem = SYS_SEM_NULL;
219 conn->state = NETCONN_NONE;
221 conn->callback = callback;
222 conn->recv_avail = 0;
224 if((msg = memp_malloc(MEMP_API_MSG)) == NULL) {
225 memp_free(MEMP_NETCONN, conn);
229 msg->type = API_MSG_NEWCONN;
230 msg->msg.msg.bc.port = proto; /* misusing the port field */
231 msg->msg.conn = conn;
233 sys_mbox_fetch(conn->mbox, NULL);
234 memp_free(MEMP_API_MSG, msg);
236 if ( conn->err != ERR_OK ) {
237 memp_free(MEMP_NETCONN, conn);
246 netconn *netconn_new(enum netconn_type t)
248 return netconn_new_with_proto_and_callback(t,0,NULL);
252 netconn *netconn_new_with_callback(enum netconn_type t,
253 void (*callback)(struct netconn *, enum netconn_evt, u16_t len))
255 return netconn_new_with_proto_and_callback(t,0,callback);
260 netconn_delete(struct netconn *conn)
269 if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) {
273 msg->type = API_MSG_DELCONN;
274 msg->msg.conn = conn;
276 sys_mbox_fetch(conn->mbox, NULL);
277 memp_free(MEMP_API_MSG, msg);
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) {
284 pbuf_free((struct pbuf *)mem);
286 netbuf_delete((struct netbuf *)mem);
289 sys_mbox_free(conn->recvmbox);
290 conn->recvmbox = SYS_MBOX_NULL;
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);
300 sys_mbox_free(conn->acceptmbox);
301 conn->acceptmbox = SYS_MBOX_NULL;
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);
309 /* conn->sem = SYS_SEM_NULL;*/
310 memp_free(MEMP_NETCONN, conn);
315 netconn_type(struct netconn *conn)
321 netconn_peer(struct netconn *conn, struct ip_addr *addr,
324 switch (conn->type) {
326 /* return an error as connecting is only a helper for upper layers */
328 case NETCONN_UDPLITE:
329 case NETCONN_UDPNOCHKSUM:
331 if (conn->pcb.udp == NULL ||
332 ((conn->pcb.udp->flags & UDP_FLAGS_CONNECTED) == 0))
334 *addr = (conn->pcb.udp->remote_ip);
335 *port = conn->pcb.udp->remote_port;
338 if (conn->pcb.tcp == NULL)
340 *addr = (conn->pcb.tcp->remote_ip);
341 *port = conn->pcb.tcp->remote_port;
344 return (conn->err = ERR_OK);
348 netconn_addr(struct netconn *conn, struct ip_addr **addr,
351 switch (conn->type) {
353 *addr = &(conn->pcb.raw->local_ip);
354 *port = conn->pcb.raw->protocol;
356 case NETCONN_UDPLITE:
357 case NETCONN_UDPNOCHKSUM:
359 *addr = &(conn->pcb.udp->local_ip);
360 *port = conn->pcb.udp->local_port;
363 *addr = &(conn->pcb.tcp->local_ip);
364 *port = conn->pcb.tcp->local_port;
367 return (conn->err = ERR_OK);
371 netconn_bind(struct netconn *conn, struct ip_addr *addr,
380 if (conn->type != NETCONN_TCP &&
381 conn->recvmbox == SYS_MBOX_NULL) {
382 if ((conn->recvmbox = sys_mbox_new()) == SYS_MBOX_NULL) {
387 if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) {
388 return (conn->err = ERR_MEM);
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;
395 sys_mbox_fetch(conn->mbox, NULL);
396 memp_free(MEMP_API_MSG, msg);
402 netconn_connect(struct netconn *conn, struct ip_addr *addr,
412 if (conn->recvmbox == SYS_MBOX_NULL) {
413 if ((conn->recvmbox = sys_mbox_new()) == SYS_MBOX_NULL) {
418 if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) {
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;
426 sys_mbox_fetch(conn->mbox, NULL);
427 memp_free(MEMP_API_MSG, msg);
432 netconn_disconnect(struct netconn *conn)
440 if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) {
443 msg->type = API_MSG_DISCONNECT;
444 msg->msg.conn = conn;
446 sys_mbox_fetch(conn->mbox, NULL);
447 memp_free(MEMP_API_MSG, msg);
453 netconn_listen(struct netconn *conn)
461 if (conn->acceptmbox == SYS_MBOX_NULL) {
462 conn->acceptmbox = sys_mbox_new();
463 if (conn->acceptmbox == SYS_MBOX_NULL) {
468 if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) {
469 return (conn->err = ERR_MEM);
471 msg->type = API_MSG_LISTEN;
472 msg->msg.conn = conn;
474 sys_mbox_fetch(conn->mbox, NULL);
475 memp_free(MEMP_API_MSG, msg);
480 netconn_accept(struct netconn *conn)
482 struct netconn *newconn;
488 sys_mbox_fetch(conn->acceptmbox, (void **)&newconn);
489 /* Register event with callback */
491 (*conn->callback)(conn, NETCONN_EVT_RCVMINUS, 0);
497 netconn_recv(struct netconn *conn)
508 if (conn->recvmbox == SYS_MBOX_NULL) {
509 conn->err = ERR_CONN;
513 if (conn->err != ERR_OK) {
517 if (conn->type == NETCONN_TCP) {
518 if (conn->pcb.tcp->state == LISTEN) {
519 conn->err = ERR_CONN;
524 buf = memp_malloc(MEMP_NETBUF);
531 sys_mbox_fetch(conn->recvmbox, (void **)&p);
536 conn->recv_avail -= len;
541 /* Register event with callback */
543 (*conn->callback)(conn, NETCONN_EVT_RCVMINUS, len);
545 /* If we are closed, we indicate that we no longer wish to receive
546 data by setting conn->recvmbox to SYS_MBOX_NULL. */
548 memp_free(MEMP_NETBUF, buf);
549 sys_mbox_free(conn->recvmbox);
550 conn->recvmbox = SYS_MBOX_NULL;
557 buf->fromaddr = NULL;
559 /* Let the stack know that we have taken the data. */
560 if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) {
564 msg->type = API_MSG_RECV;
565 msg->msg.conn = conn;
567 msg->msg.msg.len = buf->p->tot_len;
569 msg->msg.msg.len = 1;
573 sys_mbox_fetch(conn->mbox, NULL);
574 memp_free(MEMP_API_MSG, msg);
576 sys_mbox_fetch(conn->recvmbox, (void **)&buf);
577 conn->recv_avail -= buf->p->tot_len;
578 /* Register event with callback */
580 (*conn->callback)(conn, NETCONN_EVT_RCVMINUS, buf->p->tot_len);
586 LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_recv: received %p (err %d)\n", (void *)buf, conn->err));
593 netconn_send(struct netconn *conn, struct netbuf *buf)
601 if (conn->err != ERR_OK) {
605 if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) {
606 return (conn->err = ERR_MEM);
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;
615 sys_mbox_fetch(conn->mbox, NULL);
616 memp_free(MEMP_API_MSG, msg);
621 netconn_write(struct netconn *conn, void *dataptr, u16_t size, u8_t copy)
630 if (conn->err != ERR_OK) {
634 if (conn->sem == SYS_SEM_NULL) {
635 conn->sem = sys_sem_new(0);
636 if (conn->sem == SYS_SEM_NULL) {
641 if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) {
642 return (conn->err = ERR_MEM);
644 msg->type = API_MSG_WRITE;
645 msg->msg.conn = conn;
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;
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) {
660 if (size > tcp_sndbuf(conn->pcb.tcp)) {
661 /* We cannot send more than one send buffer's worth of data at a
663 len = tcp_sndbuf(conn->pcb.tcp);
671 LWIP_DEBUGF(API_LIB_DEBUG, ("netconn_write: writing %d bytes (%d)\n", len, copy));
672 msg->msg.msg.w.len = len;
674 sys_mbox_fetch(conn->mbox, NULL);
675 if (conn->err == ERR_OK) {
676 dataptr = (void *)((u8_t *)dataptr + len);
678 } else if (conn->err == ERR_MEM) {
680 sys_sem_wait(conn->sem);
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;
697 netconn_close(struct netconn *conn)
704 if ((msg = memp_malloc(MEMP_API_MSG)) == NULL) {
705 return (conn->err = ERR_MEM);
708 conn->state = NETCONN_CLOSE;
710 msg->type = API_MSG_CLOSE;
711 msg->msg.conn = conn;
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);
719 conn->state = NETCONN_NONE;
720 memp_free(MEMP_API_MSG, msg);
725 netconn_err(struct netconn *conn)