Bug Summary

File:net/socket.c
Location:line 295, column 40
Description:Pass-by-value argument in function call is undefined

Annotated Source Code

1/*
2 * QEMU System Emulator
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 * THE SOFTWARE.
23 */
24#include "net/socket.h"
25
26#include "config-host.h"
27
28#include "net.h"
29#include "monitor.h"
30#include "qemu-char.h"
31#include "qemu-common.h"
32#include "qemu-error.h"
33#include "qemu-option.h"
34#include "qemu_socket.h"
35
36typedef struct NetSocketState {
37 VLANClientState nc;
38 int fd;
39 int state; /* 0 = getting length, 1 = getting data */
40 unsigned int index;
41 unsigned int packet_len;
42 uint8_t buf[4096];
43 struct sockaddr_in dgram_dst; /* contains inet host and port destination if connectionless (SOCK_DGRAM) */
44} NetSocketState;
45
46typedef struct NetSocketListenState {
47 VLANState *vlan;
48 char *model;
49 char *name;
50 int fd;
51} NetSocketListenState;
52
53/* XXX: we consider we can send the whole packet without blocking */
54static ssize_t net_socket_receive(VLANClientState *nc, const uint8_t *buf, size_t size)
55{
56 NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc)( __extension__ ( { char __attribute__((unused)) offset_must_be_zero
[ -__builtin_offsetof(NetSocketState, nc)]; ({ const typeof((
(NetSocketState *) 0)->nc) *__mptr = (nc); (NetSocketState
*) ((char *) __mptr - __builtin_offsetof(NetSocketState, nc)
);});}));
57 uint32_t len;
58 len = htonl(size);
59
60 send_all(s->fd, (const uint8_t *)&len, sizeof(len));
61 return send_all(s->fd, buf, size);
62}
63
64static ssize_t net_socket_receive_dgram(VLANClientState *nc, const uint8_t *buf, size_t size)
65{
66 NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc)( __extension__ ( { char __attribute__((unused)) offset_must_be_zero
[ -__builtin_offsetof(NetSocketState, nc)]; ({ const typeof((
(NetSocketState *) 0)->nc) *__mptr = (nc); (NetSocketState
*) ((char *) __mptr - __builtin_offsetof(NetSocketState, nc)
);});}));
67
68 return sendto(s->fd, (const void *)buf, size, 0,
69 (struct sockaddr *)&s->dgram_dst, sizeof(s->dgram_dst));
70}
71
72static void net_socket_send(void *opaque)
73{
74 NetSocketState *s = opaque;
75 int size, err;
76 unsigned l;
77 uint8_t buf1[4096];
78 const uint8_t *buf;
79
80 size = qemu_recv(s->fd, buf1, sizeof(buf1), 0)recv(s->fd, buf1, sizeof(buf1), 0);
81 if (size < 0) {
82 err = socket_error()(*__errno_location ());
83 if (err != EWOULDBLOCK11)
84 goto eoc;
85 } else if (size == 0) {
86 /* end of connection */
87 eoc:
88 qemu_set_fd_handler(s->fd, NULL((void*)0), NULL((void*)0), NULL((void*)0));
89 closesocket(s->fd)close(s->fd);
90 return;
91 }
92 buf = buf1;
93 while (size > 0) {
94 /* reassemble a packet from the network */
95 switch(s->state) {
96 case 0:
97 l = 4 - s->index;
98 if (l > size)
99 l = size;
100 memcpy(s->buf + s->index, buf, l);
101 buf += l;
102 size -= l;
103 s->index += l;
104 if (s->index == 4) {
105 /* got length */
106 s->packet_len = ntohl(*(uint32_t *)s->buf);
107 s->index = 0;
108 s->state = 1;
109 }
110 break;
111 case 1:
112 l = s->packet_len - s->index;
113 if (l > size)
114 l = size;
115 if (s->index + l <= sizeof(s->buf)) {
116 memcpy(s->buf + s->index, buf, l);
117 } else {
118 fprintf(stderrstderr, "serious error: oversized packet received,"
119 "connection terminated.\n");
120 s->state = 0;
121 goto eoc;
122 }
123
124 s->index += l;
125 buf += l;
126 size -= l;
127 if (s->index >= s->packet_len) {
128 qemu_send_packet(&s->nc, s->buf, s->packet_len);
129 s->index = 0;
130 s->state = 0;
131 }
132 break;
133 }
134 }
135}
136
137static void net_socket_send_dgram(void *opaque)
138{
139 NetSocketState *s = opaque;
140 int size;
141
142 size = qemu_recv(s->fd, s->buf, sizeof(s->buf), 0)recv(s->fd, s->buf, sizeof(s->buf), 0);
143 if (size < 0)
144 return;
145 if (size == 0) {
146 /* end of connection */
147 qemu_set_fd_handler(s->fd, NULL((void*)0), NULL((void*)0), NULL((void*)0));
148 return;
149 }
150 qemu_send_packet(&s->nc, s->buf, size);
151}
152
153static int net_socket_mcast_create(struct sockaddr_in *mcastaddr, struct in_addr *localaddr)
154{
155 struct ip_mreq imr;
156 int fd;
157 int val, ret;
158#ifdef __OpenBSD__
159 unsigned char loop;
160#else
161 int loop;
162#endif
163
164 if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))((((in_addr_t)(ntohl(mcastaddr->sin_addr.s_addr))) & 0xf0000000
) == 0xe0000000)) {
165 fprintf(stderrstderr, "qemu: error: specified mcastaddr \"%s\" (0x%08x) "
166 "does not contain a multicast address\n",
167 inet_ntoa(mcastaddr->sin_addr),
168 (int)ntohl(mcastaddr->sin_addr.s_addr));
169 return -1;
170
171 }
172 fd = qemu_socket(PF_INET2, SOCK_DGRAMSOCK_DGRAM, 0);
173 if (fd < 0) {
174 perror("socket(PF_INET, SOCK_DGRAM)");
175 return -1;
176 }
177
178 val = 1;
179 ret=setsockopt(fd, SOL_SOCKET1, SO_REUSEADDR2,
180 (const char *)&val, sizeof(val));
181 if (ret < 0) {
182 perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
183 goto fail;
184 }
185
186 ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr));
187 if (ret < 0) {
188 perror("bind");
189 goto fail;
190 }
191
192 /* Add host to multicast group */
193 imr.imr_multiaddr = mcastaddr->sin_addr;
194 if (localaddr) {
195 imr.imr_interface = *localaddr;
196 } else {
197 imr.imr_interface.s_addr = htonl(INADDR_ANY((in_addr_t) 0x00000000));
198 }
199
200 ret = setsockopt(fd, IPPROTO_IPIPPROTO_IP, IP_ADD_MEMBERSHIP35,
201 (const char *)&imr, sizeof(struct ip_mreq));
202 if (ret < 0) {
203 perror("setsockopt(IP_ADD_MEMBERSHIP)");
204 goto fail;
205 }
206
207 /* Force mcast msgs to loopback (eg. several QEMUs in same host */
208 loop = 1;
209 ret=setsockopt(fd, IPPROTO_IPIPPROTO_IP, IP_MULTICAST_LOOP34,
210 (const char *)&loop, sizeof(loop));
211 if (ret < 0) {
212 perror("setsockopt(SOL_IP, IP_MULTICAST_LOOP)");
213 goto fail;
214 }
215
216 /* If a bind address is given, only send packets from that address */
217 if (localaddr != NULL((void*)0)) {
218 ret = setsockopt(fd, IPPROTO_IPIPPROTO_IP, IP_MULTICAST_IF32,
219 (const char *)localaddr, sizeof(*localaddr));
220 if (ret < 0) {
221 perror("setsockopt(IP_MULTICAST_IF)");
222 goto fail;
223 }
224 }
225
226 socket_set_nonblock(fd);
227 return fd;
228fail:
229 if (fd >= 0)
230 closesocket(fd)close(fd);
231 return -1;
232}
233
234static void net_socket_cleanup(VLANClientState *nc)
235{
236 NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc)( __extension__ ( { char __attribute__((unused)) offset_must_be_zero
[ -__builtin_offsetof(NetSocketState, nc)]; ({ const typeof((
(NetSocketState *) 0)->nc) *__mptr = (nc); (NetSocketState
*) ((char *) __mptr - __builtin_offsetof(NetSocketState, nc)
);});}));
237 qemu_set_fd_handler(s->fd, NULL((void*)0), NULL((void*)0), NULL((void*)0));
238 close(s->fd);
239}
240
241static NetClientInfo net_dgram_socket_info = {
242 .type = NET_CLIENT_TYPE_SOCKET,
243 .size = sizeof(NetSocketState),
244 .receive = net_socket_receive_dgram,
245 .cleanup = net_socket_cleanup,
246};
247
248static NetSocketState *net_socket_fd_init_dgram(VLANState *vlan,
249 const char *model,
250 const char *name,
251 int fd, int is_connected)
252{
253 struct sockaddr_in saddr;
254 int newfd;
255 socklen_t saddr_len;
256 VLANClientState *nc;
257 NetSocketState *s;
258
259 /* fd passed: multicast: "learn" dgram_dst address from bound address and save it
260 * Because this may be "shared" socket from a "master" process, datagrams would be recv()
261 * by ONLY ONE process: we must "clone" this dgram socket --jjo
262 */
263
264 if (is_connected) {
1
Taking false branch
265 if (getsockname(fd, (struct sockaddr *) &saddr, &saddr_len) == 0) {
266 /* must be bound */
267 if (saddr.sin_addr.s_addr == 0) {
268 fprintf(stderrstderr, "qemu: error: init_dgram: fd=%d unbound, "
269 "cannot setup multicast dst addr\n", fd);
270 goto err;
271 }
272 /* clone dgram socket */
273 newfd = net_socket_mcast_create(&saddr, NULL((void*)0));
274 if (newfd < 0) {
275 /* error already reported by net_socket_mcast_create() */
276 goto err;
277 }
278 /* clone newfd to fd, close newfd */
279 dup2(newfd, fd);
280 close(newfd);
281
282 } else {
283 fprintf(stderrstderr,
284 "qemu: error: init_dgram: fd=%d failed getsockname(): %s\n",
285 fd, strerror(errno(*__errno_location ())));
286 goto err;
287 }
288 }
289
290 nc = qemu_new_net_client(&net_dgram_socket_info, vlan, NULL((void*)0), model, name);
291
292 snprintf(nc->info_str, sizeof(nc->info_str),
293 "socket: fd=%d (%s mcast=%s:%d)",
294 fd, is_connected ? "cloned" : "",
295 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
2
Pass-by-value argument in function call is undefined
296
297 s = DO_UPCAST(NetSocketState, nc, nc)( __extension__ ( { char __attribute__((unused)) offset_must_be_zero
[ -__builtin_offsetof(NetSocketState, nc)]; ({ const typeof((
(NetSocketState *) 0)->nc) *__mptr = (nc); (NetSocketState
*) ((char *) __mptr - __builtin_offsetof(NetSocketState, nc)
);});}));
298
299 s->fd = fd;
300
301 qemu_set_fd_handler(s->fd, net_socket_send_dgram, NULL((void*)0), s);
302
303 /* mcast: save bound address as dst */
304 if (is_connected) s->dgram_dst=saddr;
305
306 return s;
307
308err:
309 closesocket(fd)close(fd);
310 return NULL((void*)0);
311}
312
313static void net_socket_connect(void *opaque)
314{
315 NetSocketState *s = opaque;
316 qemu_set_fd_handler(s->fd, net_socket_send, NULL((void*)0), s);
317}
318
319static NetClientInfo net_socket_info = {
320 .type = NET_CLIENT_TYPE_SOCKET,
321 .size = sizeof(NetSocketState),
322 .receive = net_socket_receive,
323 .cleanup = net_socket_cleanup,
324};
325
326static NetSocketState *net_socket_fd_init_stream(VLANState *vlan,
327 const char *model,
328 const char *name,
329 int fd, int is_connected)
330{
331 VLANClientState *nc;
332 NetSocketState *s;
333
334 nc = qemu_new_net_client(&net_socket_info, vlan, NULL((void*)0), model, name);
335
336 snprintf(nc->info_str, sizeof(nc->info_str), "socket: fd=%d", fd);
337
338 s = DO_UPCAST(NetSocketState, nc, nc)( __extension__ ( { char __attribute__((unused)) offset_must_be_zero
[ -__builtin_offsetof(NetSocketState, nc)]; ({ const typeof((
(NetSocketState *) 0)->nc) *__mptr = (nc); (NetSocketState
*) ((char *) __mptr - __builtin_offsetof(NetSocketState, nc)
);});}));
339
340 s->fd = fd;
341
342 if (is_connected) {
343 net_socket_connect(s);
344 } else {
345 qemu_set_fd_handler(s->fd, NULL((void*)0), net_socket_connect, s);
346 }
347 return s;
348}
349
350static NetSocketState *net_socket_fd_init(VLANState *vlan,
351 const char *model, const char *name,
352 int fd, int is_connected)
353{
354 int so_type = -1, optlen=sizeof(so_type);
355
356 if(getsockopt(fd, SOL_SOCKET1, SO_TYPE3, (char *)&so_type,
357 (socklen_t *)&optlen)< 0) {
358 fprintf(stderrstderr, "qemu: error: getsockopt(SO_TYPE) for fd=%d failed\n",
359 fd);
360 closesocket(fd)close(fd);
361 return NULL((void*)0);
362 }
363 switch(so_type) {
364 case SOCK_DGRAMSOCK_DGRAM:
365 return net_socket_fd_init_dgram(vlan, model, name, fd, is_connected);
366 case SOCK_STREAMSOCK_STREAM:
367 return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
368 default:
369 /* who knows ... this could be a eg. a pty, do warn and continue as stream */
370 fprintf(stderrstderr, "qemu: warning: socket type=%d for fd=%d is not SOCK_DGRAM or SOCK_STREAM\n", so_type, fd);
371 return net_socket_fd_init_stream(vlan, model, name, fd, is_connected);
372 }
373 return NULL((void*)0);
374}
375
376static void net_socket_accept(void *opaque)
377{
378 NetSocketListenState *s = opaque;
379 NetSocketState *s1;
380 struct sockaddr_in saddr;
381 socklen_t len;
382 int fd;
383
384 for(;;) {
385 len = sizeof(saddr);
386 fd = qemu_accept(s->fd, (struct sockaddr *)&saddr, &len);
387 if (fd < 0 && errno(*__errno_location ()) != EINTR4) {
388 return;
389 } else if (fd >= 0) {
390 break;
391 }
392 }
393 s1 = net_socket_fd_init(s->vlan, s->model, s->name, fd, 1);
394 if (s1) {
395 snprintf(s1->nc.info_str, sizeof(s1->nc.info_str),
396 "socket: connection from %s:%d",
397 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
398 }
399}
400
401static int net_socket_listen_init(VLANState *vlan,
402 const char *model,
403 const char *name,
404 const char *host_str)
405{
406 NetSocketListenState *s;
407 int fd, val, ret;
408 struct sockaddr_in saddr;
409
410 if (parse_host_port(&saddr, host_str) < 0)
411 return -1;
412
413 s = g_malloc0(sizeof(NetSocketListenState));
414
415 fd = qemu_socket(PF_INET2, SOCK_STREAMSOCK_STREAM, 0);
416 if (fd < 0) {
417 perror("socket");
418 g_free(s);
419 return -1;
420 }
421 socket_set_nonblock(fd);
422
423 /* allow fast reuse */
424 val = 1;
425 setsockopt(fd, SOL_SOCKET1, SO_REUSEADDR2, (const char *)&val, sizeof(val));
426
427 ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
428 if (ret < 0) {
429 perror("bind");
430 g_free(s);
431 closesocket(fd)close(fd);
432 return -1;
433 }
434 ret = listen(fd, 0);
435 if (ret < 0) {
436 perror("listen");
437 g_free(s);
438 closesocket(fd)close(fd);
439 return -1;
440 }
441 s->vlan = vlan;
442 s->model = g_strdup(model);
443 s->name = name ? g_strdup(name) : NULL((void*)0);
444 s->fd = fd;
445 qemu_set_fd_handler(fd, net_socket_accept, NULL((void*)0), s);
446 return 0;
447}
448
449static int net_socket_connect_init(VLANState *vlan,
450 const char *model,
451 const char *name,
452 const char *host_str)
453{
454 NetSocketState *s;
455 int fd, connected, ret, err;
456 struct sockaddr_in saddr;
457
458 if (parse_host_port(&saddr, host_str) < 0)
459 return -1;
460
461 fd = qemu_socket(PF_INET2, SOCK_STREAMSOCK_STREAM, 0);
462 if (fd < 0) {
463 perror("socket");
464 return -1;
465 }
466 socket_set_nonblock(fd);
467
468 connected = 0;
469 for(;;) {
470 ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
471 if (ret < 0) {
472 err = socket_error()(*__errno_location ());
473 if (err == EINTR4 || err == EWOULDBLOCK11) {
474 } else if (err == EINPROGRESS115) {
475 break;
476#ifdef _WIN32
477 } else if (err == WSAEALREADY || err == WSAEINVAL) {
478 break;
479#endif
480 } else {
481 perror("connect");
482 closesocket(fd)close(fd);
483 return -1;
484 }
485 } else {
486 connected = 1;
487 break;
488 }
489 }
490 s = net_socket_fd_init(vlan, model, name, fd, connected);
491 if (!s)
492 return -1;
493 snprintf(s->nc.info_str, sizeof(s->nc.info_str),
494 "socket: connect to %s:%d",
495 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
496 return 0;
497}
498
499static int net_socket_mcast_init(VLANState *vlan,
500 const char *model,
501 const char *name,
502 const char *host_str,
503 const char *localaddr_str)
504{
505 NetSocketState *s;
506 int fd;
507 struct sockaddr_in saddr;
508 struct in_addr localaddr, *param_localaddr;
509
510 if (parse_host_port(&saddr, host_str) < 0)
511 return -1;
512
513 if (localaddr_str != NULL((void*)0)) {
514 if (inet_aton(localaddr_str, &localaddr) == 0)
515 return -1;
516 param_localaddr = &localaddr;
517 } else {
518 param_localaddr = NULL((void*)0);
519 }
520
521 fd = net_socket_mcast_create(&saddr, param_localaddr);
522 if (fd < 0)
523 return -1;
524
525 s = net_socket_fd_init(vlan, model, name, fd, 0);
526 if (!s)
527 return -1;
528
529 s->dgram_dst = saddr;
530
531 snprintf(s->nc.info_str, sizeof(s->nc.info_str),
532 "socket: mcast=%s:%d",
533 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
534 return 0;
535
536}
537
538static int net_socket_udp_init(VLANState *vlan,
539 const char *model,
540 const char *name,
541 const char *rhost,
542 const char *lhost)
543{
544 NetSocketState *s;
545 int fd, val, ret;
546 struct sockaddr_in laddr, raddr;
547
548 if (parse_host_port(&laddr, lhost) < 0) {
549 return -1;
550 }
551
552 if (parse_host_port(&raddr, rhost) < 0) {
553 return -1;
554 }
555
556 fd = qemu_socket(PF_INET2, SOCK_DGRAMSOCK_DGRAM, 0);
557 if (fd < 0) {
558 perror("socket(PF_INET, SOCK_DGRAM)");
559 return -1;
560 }
561 val = 1;
562 ret = setsockopt(fd, SOL_SOCKET1, SO_REUSEADDR2,
563 (const char *)&val, sizeof(val));
564 if (ret < 0) {
565 perror("setsockopt(SOL_SOCKET, SO_REUSEADDR)");
566 closesocket(fd)close(fd);
567 return -1;
568 }
569 ret = bind(fd, (struct sockaddr *)&laddr, sizeof(laddr));
570 if (ret < 0) {
571 perror("bind");
572 closesocket(fd)close(fd);
573 return -1;
574 }
575
576 s = net_socket_fd_init(vlan, model, name, fd, 0);
577 if (!s) {
578 return -1;
579 }
580
581 s->dgram_dst = raddr;
582
583 snprintf(s->nc.info_str, sizeof(s->nc.info_str),
584 "socket: udp=%s:%d",
585 inet_ntoa(raddr.sin_addr), ntohs(raddr.sin_port));
586 return 0;
587}
588
589int net_init_socket(QemuOpts *opts, const char *name, VLANState *vlan)
590{
591 if (qemu_opt_get(opts, "fd")) {
592 int fd;
593
594 if (qemu_opt_get(opts, "listen") ||
595 qemu_opt_get(opts, "connect") ||
596 qemu_opt_get(opts, "mcast") ||
597 qemu_opt_get(opts, "localaddr")) {
598 error_report("listen=, connect=, mcast= and localaddr= is invalid with fd=");
599 return -1;
600 }
601
602 fd = net_handle_fd_param(cur_mon, qemu_opt_get(opts, "fd"));
603 if (fd == -1) {
604 return -1;
605 }
606
607 if (!net_socket_fd_init(vlan, "socket", name, fd, 1)) {
608 return -1;
609 }
610 } else if (qemu_opt_get(opts, "listen")) {
611 const char *listen;
612
613 if (qemu_opt_get(opts, "fd") ||
614 qemu_opt_get(opts, "connect") ||
615 qemu_opt_get(opts, "mcast") ||
616 qemu_opt_get(opts, "localaddr")) {
617 error_report("fd=, connect=, mcast= and localaddr= is invalid with listen=");
618 return -1;
619 }
620
621 listen = qemu_opt_get(opts, "listen");
622
623 if (net_socket_listen_init(vlan, "socket", name, listen) == -1) {
624 return -1;
625 }
626 } else if (qemu_opt_get(opts, "connect")) {
627 const char *connect;
628
629 if (qemu_opt_get(opts, "fd") ||
630 qemu_opt_get(opts, "listen") ||
631 qemu_opt_get(opts, "mcast") ||
632 qemu_opt_get(opts, "localaddr")) {
633 error_report("fd=, listen=, mcast= and localaddr= is invalid with connect=");
634 return -1;
635 }
636
637 connect = qemu_opt_get(opts, "connect");
638
639 if (net_socket_connect_init(vlan, "socket", name, connect) == -1) {
640 return -1;
641 }
642 } else if (qemu_opt_get(opts, "mcast")) {
643 const char *mcast, *localaddr;
644
645 if (qemu_opt_get(opts, "fd") ||
646 qemu_opt_get(opts, "connect") ||
647 qemu_opt_get(opts, "listen")) {
648 error_report("fd=, connect= and listen= is invalid with mcast=");
649 return -1;
650 }
651
652 mcast = qemu_opt_get(opts, "mcast");
653 localaddr = qemu_opt_get(opts, "localaddr");
654
655 if (net_socket_mcast_init(vlan, "socket", name, mcast, localaddr) == -1) {
656 return -1;
657 }
658 } else if (qemu_opt_get(opts, "udp")) {
659 const char *udp, *localaddr;
660
661 if (qemu_opt_get(opts, "fd") ||
662 qemu_opt_get(opts, "connect") ||
663 qemu_opt_get(opts, "listen") ||
664 qemu_opt_get(opts, "mcast")) {
665 error_report("fd=, connect=, listen="
666 " and mcast= is invalid with udp=");
667 return -1;
668 }
669
670 udp = qemu_opt_get(opts, "udp");
671 localaddr = qemu_opt_get(opts, "localaddr");
672 if (localaddr == NULL((void*)0)) {
673 error_report("localaddr= is mandatory with udp=");
674 return -1;
675 }
676
677 if (net_socket_udp_init(vlan, "udp", name, udp, localaddr) == -1) {
678 return -1;
679 }
680 } else {
681 error_report("-socket requires fd=, listen=,"
682 " connect=, mcast= or udp=");
683 return -1;
684 }
685 return 0;
686}