trap signals for "-serial mon:stdio"
[qemu.git] / net / net.c
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 "config-host.h"
25
26 #include "net/net.h"
27 #include "clients.h"
28 #include "hub.h"
29 #include "net/slirp.h"
30 #include "util.h"
31
32 #include "monitor/monitor.h"
33 #include "qemu-common.h"
34 #include "qemu/sockets.h"
35 #include "qemu/config-file.h"
36 #include "qmp-commands.h"
37 #include "hw/qdev.h"
38 #include "qemu/iov.h"
39 #include "qapi-visit.h"
40 #include "qapi/opts-visitor.h"
41 #include "qapi/dealloc-visitor.h"
42
43 /* Net bridge is currently not supported for W32. */
44 #if !defined(_WIN32)
45 # define CONFIG_NET_BRIDGE
46 #endif
47
48 static QTAILQ_HEAD(, NetClientState) net_clients;
49
50 int default_net = 1;
51
52 /***********************************************************/
53 /* network device redirectors */
54
55 #if defined(DEBUG_NET)
56 static void hex_dump(FILE *f, const uint8_t *buf, int size)
57 {
58 int len, i, j, c;
59
60 for(i=0;i<size;i+=16) {
61 len = size - i;
62 if (len > 16)
63 len = 16;
64 fprintf(f, "%08x ", i);
65 for(j=0;j<16;j++) {
66 if (j < len)
67 fprintf(f, " %02x", buf[i+j]);
68 else
69 fprintf(f, " ");
70 }
71 fprintf(f, " ");
72 for(j=0;j<len;j++) {
73 c = buf[i+j];
74 if (c < ' ' || c > '~')
75 c = '.';
76 fprintf(f, "%c", c);
77 }
78 fprintf(f, "\n");
79 }
80 }
81 #endif
82
83 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
84 {
85 const char *p, *p1;
86 int len;
87 p = *pp;
88 p1 = strchr(p, sep);
89 if (!p1)
90 return -1;
91 len = p1 - p;
92 p1++;
93 if (buf_size > 0) {
94 if (len > buf_size - 1)
95 len = buf_size - 1;
96 memcpy(buf, p, len);
97 buf[len] = '\0';
98 }
99 *pp = p1;
100 return 0;
101 }
102
103 int parse_host_port(struct sockaddr_in *saddr, const char *str)
104 {
105 char buf[512];
106 struct hostent *he;
107 const char *p, *r;
108 int port;
109
110 p = str;
111 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
112 return -1;
113 saddr->sin_family = AF_INET;
114 if (buf[0] == '\0') {
115 saddr->sin_addr.s_addr = 0;
116 } else {
117 if (qemu_isdigit(buf[0])) {
118 if (!inet_aton(buf, &saddr->sin_addr))
119 return -1;
120 } else {
121 if ((he = gethostbyname(buf)) == NULL)
122 return - 1;
123 saddr->sin_addr = *(struct in_addr *)he->h_addr;
124 }
125 }
126 port = strtol(p, (char **)&r, 0);
127 if (r == p)
128 return -1;
129 saddr->sin_port = htons(port);
130 return 0;
131 }
132
133 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6])
134 {
135 snprintf(nc->info_str, sizeof(nc->info_str),
136 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
137 nc->model,
138 macaddr[0], macaddr[1], macaddr[2],
139 macaddr[3], macaddr[4], macaddr[5]);
140 }
141
142 void qemu_macaddr_default_if_unset(MACAddr *macaddr)
143 {
144 static int index = 0;
145 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } };
146
147 if (memcmp(macaddr, &zero, sizeof(zero)) != 0)
148 return;
149 macaddr->a[0] = 0x52;
150 macaddr->a[1] = 0x54;
151 macaddr->a[2] = 0x00;
152 macaddr->a[3] = 0x12;
153 macaddr->a[4] = 0x34;
154 macaddr->a[5] = 0x56 + index++;
155 }
156
157 /**
158 * Generate a name for net client
159 *
160 * Only net clients created with the legacy -net option and NICs need this.
161 */
162 static char *assign_name(NetClientState *nc1, const char *model)
163 {
164 NetClientState *nc;
165 char buf[256];
166 int id = 0;
167
168 QTAILQ_FOREACH(nc, &net_clients, next) {
169 if (nc == nc1) {
170 continue;
171 }
172 if (strcmp(nc->model, model) == 0) {
173 id++;
174 }
175 }
176
177 snprintf(buf, sizeof(buf), "%s.%d", model, id);
178
179 return g_strdup(buf);
180 }
181
182 static void qemu_net_client_destructor(NetClientState *nc)
183 {
184 g_free(nc);
185 }
186
187 static void qemu_net_client_setup(NetClientState *nc,
188 NetClientInfo *info,
189 NetClientState *peer,
190 const char *model,
191 const char *name,
192 NetClientDestructor *destructor)
193 {
194 nc->info = info;
195 nc->model = g_strdup(model);
196 if (name) {
197 nc->name = g_strdup(name);
198 } else {
199 nc->name = assign_name(nc, model);
200 }
201
202 if (peer) {
203 assert(!peer->peer);
204 nc->peer = peer;
205 peer->peer = nc;
206 }
207 QTAILQ_INSERT_TAIL(&net_clients, nc, next);
208
209 nc->send_queue = qemu_new_net_queue(nc);
210 nc->destructor = destructor;
211 }
212
213 NetClientState *qemu_new_net_client(NetClientInfo *info,
214 NetClientState *peer,
215 const char *model,
216 const char *name)
217 {
218 NetClientState *nc;
219
220 assert(info->size >= sizeof(NetClientState));
221
222 nc = g_malloc0(info->size);
223 qemu_net_client_setup(nc, info, peer, model, name,
224 qemu_net_client_destructor);
225
226 return nc;
227 }
228
229 NICState *qemu_new_nic(NetClientInfo *info,
230 NICConf *conf,
231 const char *model,
232 const char *name,
233 void *opaque)
234 {
235 NetClientState **peers = conf->peers.ncs;
236 NICState *nic;
237 int i, queues = MAX(1, conf->queues);
238
239 assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC);
240 assert(info->size >= sizeof(NICState));
241
242 nic = g_malloc0(info->size + sizeof(NetClientState) * queues);
243 nic->ncs = (void *)nic + info->size;
244 nic->conf = conf;
245 nic->opaque = opaque;
246
247 for (i = 0; i < queues; i++) {
248 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name,
249 NULL);
250 nic->ncs[i].queue_index = i;
251 }
252
253 return nic;
254 }
255
256 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index)
257 {
258 return nic->ncs + queue_index;
259 }
260
261 NetClientState *qemu_get_queue(NICState *nic)
262 {
263 return qemu_get_subqueue(nic, 0);
264 }
265
266 NICState *qemu_get_nic(NetClientState *nc)
267 {
268 NetClientState *nc0 = nc - nc->queue_index;
269
270 return (NICState *)((void *)nc0 - nc->info->size);
271 }
272
273 void *qemu_get_nic_opaque(NetClientState *nc)
274 {
275 NICState *nic = qemu_get_nic(nc);
276
277 return nic->opaque;
278 }
279
280 static void qemu_cleanup_net_client(NetClientState *nc)
281 {
282 QTAILQ_REMOVE(&net_clients, nc, next);
283
284 if (nc->info->cleanup) {
285 nc->info->cleanup(nc);
286 }
287 }
288
289 static void qemu_free_net_client(NetClientState *nc)
290 {
291 if (nc->send_queue) {
292 qemu_del_net_queue(nc->send_queue);
293 }
294 if (nc->peer) {
295 nc->peer->peer = NULL;
296 }
297 g_free(nc->name);
298 g_free(nc->model);
299 if (nc->destructor) {
300 nc->destructor(nc);
301 }
302 }
303
304 void qemu_del_net_client(NetClientState *nc)
305 {
306 NetClientState *ncs[MAX_QUEUE_NUM];
307 int queues, i;
308
309 /* If the NetClientState belongs to a multiqueue backend, we will change all
310 * other NetClientStates also.
311 */
312 queues = qemu_find_net_clients_except(nc->name, ncs,
313 NET_CLIENT_OPTIONS_KIND_NIC,
314 MAX_QUEUE_NUM);
315 assert(queues != 0);
316
317 /* If there is a peer NIC, delete and cleanup client, but do not free. */
318 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
319 NICState *nic = qemu_get_nic(nc->peer);
320 if (nic->peer_deleted) {
321 return;
322 }
323 nic->peer_deleted = true;
324
325 for (i = 0; i < queues; i++) {
326 ncs[i]->peer->link_down = true;
327 }
328
329 if (nc->peer->info->link_status_changed) {
330 nc->peer->info->link_status_changed(nc->peer);
331 }
332
333 for (i = 0; i < queues; i++) {
334 qemu_cleanup_net_client(ncs[i]);
335 }
336
337 return;
338 }
339
340 assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC);
341
342 for (i = 0; i < queues; i++) {
343 qemu_cleanup_net_client(ncs[i]);
344 qemu_free_net_client(ncs[i]);
345 }
346 }
347
348 void qemu_del_nic(NICState *nic)
349 {
350 int i, queues = MAX(nic->conf->queues, 1);
351
352 /* If this is a peer NIC and peer has already been deleted, free it now. */
353 if (nic->peer_deleted) {
354 for (i = 0; i < queues; i++) {
355 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer);
356 }
357 }
358
359 for (i = queues - 1; i >= 0; i--) {
360 NetClientState *nc = qemu_get_subqueue(nic, i);
361
362 qemu_cleanup_net_client(nc);
363 qemu_free_net_client(nc);
364 }
365
366 g_free(nic);
367 }
368
369 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque)
370 {
371 NetClientState *nc;
372
373 QTAILQ_FOREACH(nc, &net_clients, next) {
374 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
375 if (nc->queue_index == 0) {
376 func(qemu_get_nic(nc), opaque);
377 }
378 }
379 }
380 }
381
382 int qemu_can_send_packet(NetClientState *sender)
383 {
384 if (!sender->peer) {
385 return 1;
386 }
387
388 if (sender->peer->receive_disabled) {
389 return 0;
390 } else if (sender->peer->info->can_receive &&
391 !sender->peer->info->can_receive(sender->peer)) {
392 return 0;
393 }
394 return 1;
395 }
396
397 ssize_t qemu_deliver_packet(NetClientState *sender,
398 unsigned flags,
399 const uint8_t *data,
400 size_t size,
401 void *opaque)
402 {
403 NetClientState *nc = opaque;
404 ssize_t ret;
405
406 if (nc->link_down) {
407 return size;
408 }
409
410 if (nc->receive_disabled) {
411 return 0;
412 }
413
414 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) {
415 ret = nc->info->receive_raw(nc, data, size);
416 } else {
417 ret = nc->info->receive(nc, data, size);
418 }
419
420 if (ret == 0) {
421 nc->receive_disabled = 1;
422 };
423
424 return ret;
425 }
426
427 void qemu_purge_queued_packets(NetClientState *nc)
428 {
429 if (!nc->peer) {
430 return;
431 }
432
433 qemu_net_queue_purge(nc->peer->send_queue, nc);
434 }
435
436 void qemu_flush_queued_packets(NetClientState *nc)
437 {
438 nc->receive_disabled = 0;
439
440 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) {
441 if (net_hub_flush(nc->peer)) {
442 qemu_notify_event();
443 }
444 return;
445 }
446 if (qemu_net_queue_flush(nc->send_queue)) {
447 /* We emptied the queue successfully, signal to the IO thread to repoll
448 * the file descriptor (for tap, for example).
449 */
450 qemu_notify_event();
451 }
452 }
453
454 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender,
455 unsigned flags,
456 const uint8_t *buf, int size,
457 NetPacketSent *sent_cb)
458 {
459 NetQueue *queue;
460
461 #ifdef DEBUG_NET
462 printf("qemu_send_packet_async:\n");
463 hex_dump(stdout, buf, size);
464 #endif
465
466 if (sender->link_down || !sender->peer) {
467 return size;
468 }
469
470 queue = sender->peer->send_queue;
471
472 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb);
473 }
474
475 ssize_t qemu_send_packet_async(NetClientState *sender,
476 const uint8_t *buf, int size,
477 NetPacketSent *sent_cb)
478 {
479 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE,
480 buf, size, sent_cb);
481 }
482
483 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size)
484 {
485 qemu_send_packet_async(nc, buf, size, NULL);
486 }
487
488 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size)
489 {
490 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW,
491 buf, size, NULL);
492 }
493
494 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov,
495 int iovcnt)
496 {
497 uint8_t buffer[NET_BUFSIZE];
498 size_t offset;
499
500 offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer));
501
502 return nc->info->receive(nc, buffer, offset);
503 }
504
505 ssize_t qemu_deliver_packet_iov(NetClientState *sender,
506 unsigned flags,
507 const struct iovec *iov,
508 int iovcnt,
509 void *opaque)
510 {
511 NetClientState *nc = opaque;
512 int ret;
513
514 if (nc->link_down) {
515 return iov_size(iov, iovcnt);
516 }
517
518 if (nc->receive_disabled) {
519 return 0;
520 }
521
522 if (nc->info->receive_iov) {
523 ret = nc->info->receive_iov(nc, iov, iovcnt);
524 } else {
525 ret = nc_sendv_compat(nc, iov, iovcnt);
526 }
527
528 if (ret == 0) {
529 nc->receive_disabled = 1;
530 }
531
532 return ret;
533 }
534
535 ssize_t qemu_sendv_packet_async(NetClientState *sender,
536 const struct iovec *iov, int iovcnt,
537 NetPacketSent *sent_cb)
538 {
539 NetQueue *queue;
540
541 if (sender->link_down || !sender->peer) {
542 return iov_size(iov, iovcnt);
543 }
544
545 queue = sender->peer->send_queue;
546
547 return qemu_net_queue_send_iov(queue, sender,
548 QEMU_NET_PACKET_FLAG_NONE,
549 iov, iovcnt, sent_cb);
550 }
551
552 ssize_t
553 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt)
554 {
555 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL);
556 }
557
558 NetClientState *qemu_find_netdev(const char *id)
559 {
560 NetClientState *nc;
561
562 QTAILQ_FOREACH(nc, &net_clients, next) {
563 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC)
564 continue;
565 if (!strcmp(nc->name, id)) {
566 return nc;
567 }
568 }
569
570 return NULL;
571 }
572
573 int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
574 NetClientOptionsKind type, int max)
575 {
576 NetClientState *nc;
577 int ret = 0;
578
579 QTAILQ_FOREACH(nc, &net_clients, next) {
580 if (nc->info->type == type) {
581 continue;
582 }
583 if (!strcmp(nc->name, id)) {
584 if (ret < max) {
585 ncs[ret] = nc;
586 }
587 ret++;
588 }
589 }
590
591 return ret;
592 }
593
594 static int nic_get_free_idx(void)
595 {
596 int index;
597
598 for (index = 0; index < MAX_NICS; index++)
599 if (!nd_table[index].used)
600 return index;
601 return -1;
602 }
603
604 int qemu_show_nic_models(const char *arg, const char *const *models)
605 {
606 int i;
607
608 if (!arg || !is_help_option(arg)) {
609 return 0;
610 }
611
612 fprintf(stderr, "qemu: Supported NIC models: ");
613 for (i = 0 ; models[i]; i++)
614 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
615 return 1;
616 }
617
618 void qemu_check_nic_model(NICInfo *nd, const char *model)
619 {
620 const char *models[2];
621
622 models[0] = model;
623 models[1] = NULL;
624
625 if (qemu_show_nic_models(nd->model, models))
626 exit(0);
627 if (qemu_find_nic_model(nd, models, model) < 0)
628 exit(1);
629 }
630
631 int qemu_find_nic_model(NICInfo *nd, const char * const *models,
632 const char *default_model)
633 {
634 int i;
635
636 if (!nd->model)
637 nd->model = g_strdup(default_model);
638
639 for (i = 0 ; models[i]; i++) {
640 if (strcmp(nd->model, models[i]) == 0)
641 return i;
642 }
643
644 error_report("Unsupported NIC model: %s", nd->model);
645 return -1;
646 }
647
648 static int net_init_nic(const NetClientOptions *opts, const char *name,
649 NetClientState *peer)
650 {
651 int idx;
652 NICInfo *nd;
653 const NetLegacyNicOptions *nic;
654
655 assert(opts->kind == NET_CLIENT_OPTIONS_KIND_NIC);
656 nic = opts->nic;
657
658 idx = nic_get_free_idx();
659 if (idx == -1 || nb_nics >= MAX_NICS) {
660 error_report("Too Many NICs");
661 return -1;
662 }
663
664 nd = &nd_table[idx];
665
666 memset(nd, 0, sizeof(*nd));
667
668 if (nic->has_netdev) {
669 nd->netdev = qemu_find_netdev(nic->netdev);
670 if (!nd->netdev) {
671 error_report("netdev '%s' not found", nic->netdev);
672 return -1;
673 }
674 } else {
675 assert(peer);
676 nd->netdev = peer;
677 }
678 nd->name = g_strdup(name);
679 if (nic->has_model) {
680 nd->model = g_strdup(nic->model);
681 }
682 if (nic->has_addr) {
683 nd->devaddr = g_strdup(nic->addr);
684 }
685
686 if (nic->has_macaddr &&
687 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) {
688 error_report("invalid syntax for ethernet address");
689 return -1;
690 }
691 qemu_macaddr_default_if_unset(&nd->macaddr);
692
693 if (nic->has_vectors) {
694 if (nic->vectors > 0x7ffffff) {
695 error_report("invalid # of vectors: %"PRIu32, nic->vectors);
696 return -1;
697 }
698 nd->nvectors = nic->vectors;
699 } else {
700 nd->nvectors = DEV_NVECTORS_UNSPECIFIED;
701 }
702
703 nd->used = 1;
704 nb_nics++;
705
706 return idx;
707 }
708
709
710 static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])(
711 const NetClientOptions *opts,
712 const char *name,
713 NetClientState *peer) = {
714 [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic,
715 #ifdef CONFIG_SLIRP
716 [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp,
717 #endif
718 [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap,
719 [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket,
720 #ifdef CONFIG_VDE
721 [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde,
722 #endif
723 [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump,
724 #ifdef CONFIG_NET_BRIDGE
725 [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge,
726 #endif
727 [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport,
728 };
729
730
731 static int net_client_init1(const void *object, int is_netdev, Error **errp)
732 {
733 union {
734 const Netdev *netdev;
735 const NetLegacy *net;
736 } u;
737 const NetClientOptions *opts;
738 const char *name;
739
740 if (is_netdev) {
741 u.netdev = object;
742 opts = u.netdev->opts;
743 name = u.netdev->id;
744
745 switch (opts->kind) {
746 #ifdef CONFIG_SLIRP
747 case NET_CLIENT_OPTIONS_KIND_USER:
748 #endif
749 case NET_CLIENT_OPTIONS_KIND_TAP:
750 case NET_CLIENT_OPTIONS_KIND_SOCKET:
751 #ifdef CONFIG_VDE
752 case NET_CLIENT_OPTIONS_KIND_VDE:
753 #endif
754 #ifdef CONFIG_NET_BRIDGE
755 case NET_CLIENT_OPTIONS_KIND_BRIDGE:
756 #endif
757 case NET_CLIENT_OPTIONS_KIND_HUBPORT:
758 break;
759
760 default:
761 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type",
762 "a netdev backend type");
763 return -1;
764 }
765 } else {
766 u.net = object;
767 opts = u.net->opts;
768 /* missing optional values have been initialized to "all bits zero" */
769 name = u.net->has_id ? u.net->id : u.net->name;
770 }
771
772 if (net_client_init_fun[opts->kind]) {
773 NetClientState *peer = NULL;
774
775 /* Do not add to a vlan if it's a -netdev or a nic with a netdev=
776 * parameter. */
777 if (!is_netdev &&
778 (opts->kind != NET_CLIENT_OPTIONS_KIND_NIC ||
779 !opts->nic->has_netdev)) {
780 peer = net_hub_add_port(u.net->has_vlan ? u.net->vlan : 0, NULL);
781 }
782
783 if (net_client_init_fun[opts->kind](opts, name, peer) < 0) {
784 /* TODO push error reporting into init() methods */
785 error_set(errp, QERR_DEVICE_INIT_FAILED,
786 NetClientOptionsKind_lookup[opts->kind]);
787 return -1;
788 }
789 }
790 return 0;
791 }
792
793
794 static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp)
795 {
796 if (is_netdev) {
797 visit_type_Netdev(v, (Netdev **)object, NULL, errp);
798 } else {
799 visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp);
800 }
801 }
802
803
804 int net_client_init(QemuOpts *opts, int is_netdev, Error **errp)
805 {
806 void *object = NULL;
807 Error *err = NULL;
808 int ret = -1;
809
810 {
811 OptsVisitor *ov = opts_visitor_new(opts);
812
813 net_visit(opts_get_visitor(ov), is_netdev, &object, &err);
814 opts_visitor_cleanup(ov);
815 }
816
817 if (!err) {
818 ret = net_client_init1(object, is_netdev, &err);
819 }
820
821 if (object) {
822 QapiDeallocVisitor *dv = qapi_dealloc_visitor_new();
823
824 net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL);
825 qapi_dealloc_visitor_cleanup(dv);
826 }
827
828 error_propagate(errp, err);
829 return ret;
830 }
831
832
833 static int net_host_check_device(const char *device)
834 {
835 int i;
836 const char *valid_param_list[] = { "tap", "socket", "dump"
837 #ifdef CONFIG_NET_BRIDGE
838 , "bridge"
839 #endif
840 #ifdef CONFIG_SLIRP
841 ,"user"
842 #endif
843 #ifdef CONFIG_VDE
844 ,"vde"
845 #endif
846 };
847 for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
848 if (!strncmp(valid_param_list[i], device,
849 strlen(valid_param_list[i])))
850 return 1;
851 }
852
853 return 0;
854 }
855
856 void net_host_device_add(Monitor *mon, const QDict *qdict)
857 {
858 const char *device = qdict_get_str(qdict, "device");
859 const char *opts_str = qdict_get_try_str(qdict, "opts");
860 Error *local_err = NULL;
861 QemuOpts *opts;
862
863 if (!net_host_check_device(device)) {
864 monitor_printf(mon, "invalid host network device %s\n", device);
865 return;
866 }
867
868 opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0);
869 if (!opts) {
870 return;
871 }
872
873 qemu_opt_set(opts, "type", device);
874
875 net_client_init(opts, 0, &local_err);
876 if (error_is_set(&local_err)) {
877 qerror_report_err(local_err);
878 error_free(local_err);
879 monitor_printf(mon, "adding host network device %s failed\n", device);
880 }
881 }
882
883 void net_host_device_remove(Monitor *mon, const QDict *qdict)
884 {
885 NetClientState *nc;
886 int vlan_id = qdict_get_int(qdict, "vlan_id");
887 const char *device = qdict_get_str(qdict, "device");
888
889 nc = net_hub_find_client_by_name(vlan_id, device);
890 if (!nc) {
891 return;
892 }
893 if (!net_host_check_device(nc->model)) {
894 monitor_printf(mon, "invalid host network device %s\n", device);
895 return;
896 }
897 qemu_del_net_client(nc);
898 }
899
900 void netdev_add(QemuOpts *opts, Error **errp)
901 {
902 net_client_init(opts, 1, errp);
903 }
904
905 int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret)
906 {
907 Error *local_err = NULL;
908 QemuOptsList *opts_list;
909 QemuOpts *opts;
910
911 opts_list = qemu_find_opts_err("netdev", &local_err);
912 if (error_is_set(&local_err)) {
913 goto exit_err;
914 }
915
916 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err);
917 if (error_is_set(&local_err)) {
918 goto exit_err;
919 }
920
921 netdev_add(opts, &local_err);
922 if (error_is_set(&local_err)) {
923 qemu_opts_del(opts);
924 goto exit_err;
925 }
926
927 return 0;
928
929 exit_err:
930 qerror_report_err(local_err);
931 error_free(local_err);
932 return -1;
933 }
934
935 void qmp_netdev_del(const char *id, Error **errp)
936 {
937 NetClientState *nc;
938 QemuOpts *opts;
939
940 nc = qemu_find_netdev(id);
941 if (!nc) {
942 error_set(errp, QERR_DEVICE_NOT_FOUND, id);
943 return;
944 }
945
946 opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id);
947 if (!opts) {
948 error_setg(errp, "Device '%s' is not a netdev", id);
949 return;
950 }
951
952 qemu_del_net_client(nc);
953 qemu_opts_del(opts);
954 }
955
956 void print_net_client(Monitor *mon, NetClientState *nc)
957 {
958 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name,
959 nc->queue_index,
960 NetClientOptionsKind_lookup[nc->info->type],
961 nc->info_str);
962 }
963
964 void do_info_network(Monitor *mon, const QDict *qdict)
965 {
966 NetClientState *nc, *peer;
967 NetClientOptionsKind type;
968
969 net_hub_info(mon);
970
971 QTAILQ_FOREACH(nc, &net_clients, next) {
972 peer = nc->peer;
973 type = nc->info->type;
974
975 /* Skip if already printed in hub info */
976 if (net_hub_id_for_client(nc, NULL) == 0) {
977 continue;
978 }
979
980 if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) {
981 print_net_client(mon, nc);
982 } /* else it's a netdev connected to a NIC, printed with the NIC */
983 if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) {
984 monitor_printf(mon, " \\ ");
985 print_net_client(mon, peer);
986 }
987 }
988 }
989
990 void qmp_set_link(const char *name, bool up, Error **errp)
991 {
992 NetClientState *ncs[MAX_QUEUE_NUM];
993 NetClientState *nc;
994 int queues, i;
995
996 queues = qemu_find_net_clients_except(name, ncs,
997 NET_CLIENT_OPTIONS_KIND_MAX,
998 MAX_QUEUE_NUM);
999
1000 if (queues == 0) {
1001 error_set(errp, QERR_DEVICE_NOT_FOUND, name);
1002 return;
1003 }
1004 nc = ncs[0];
1005
1006 for (i = 0; i < queues; i++) {
1007 ncs[i]->link_down = !up;
1008 }
1009
1010 if (nc->info->link_status_changed) {
1011 nc->info->link_status_changed(nc);
1012 }
1013
1014 /* Notify peer. Don't update peer link status: this makes it possible to
1015 * disconnect from host network without notifying the guest.
1016 * FIXME: is disconnected link status change operation useful?
1017 *
1018 * Current behaviour is compatible with qemu vlans where there could be
1019 * multiple clients that can still communicate with each other in
1020 * disconnected mode. For now maintain this compatibility. */
1021 if (nc->peer && nc->peer->info->link_status_changed) {
1022 nc->peer->info->link_status_changed(nc->peer);
1023 }
1024 }
1025
1026 void net_cleanup(void)
1027 {
1028 NetClientState *nc;
1029
1030 /* We may del multiple entries during qemu_del_net_client(),
1031 * so QTAILQ_FOREACH_SAFE() is also not safe here.
1032 */
1033 while (!QTAILQ_EMPTY(&net_clients)) {
1034 nc = QTAILQ_FIRST(&net_clients);
1035 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
1036 qemu_del_nic(qemu_get_nic(nc));
1037 } else {
1038 qemu_del_net_client(nc);
1039 }
1040 }
1041 }
1042
1043 void net_check_clients(void)
1044 {
1045 NetClientState *nc;
1046 int i;
1047
1048 /* Don't warn about the default network setup that you get if
1049 * no command line -net or -netdev options are specified. There
1050 * are two cases that we would otherwise complain about:
1051 * (1) board doesn't support a NIC but the implicit "-net nic"
1052 * requested one
1053 * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic"
1054 * sets up a nic that isn't connected to anything.
1055 */
1056 if (default_net) {
1057 return;
1058 }
1059
1060 net_hub_check_clients();
1061
1062 QTAILQ_FOREACH(nc, &net_clients, next) {
1063 if (!nc->peer) {
1064 fprintf(stderr, "Warning: %s %s has no peer\n",
1065 nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ?
1066 "nic" : "netdev", nc->name);
1067 }
1068 }
1069
1070 /* Check that all NICs requested via -net nic actually got created.
1071 * NICs created via -device don't need to be checked here because
1072 * they are always instantiated.
1073 */
1074 for (i = 0; i < MAX_NICS; i++) {
1075 NICInfo *nd = &nd_table[i];
1076 if (nd->used && !nd->instantiated) {
1077 fprintf(stderr, "Warning: requested NIC (%s, model %s) "
1078 "was not created (not supported by this machine?)\n",
1079 nd->name ? nd->name : "anonymous",
1080 nd->model ? nd->model : "unspecified");
1081 }
1082 }
1083 }
1084
1085 static int net_init_client(QemuOpts *opts, void *dummy)
1086 {
1087 Error *local_err = NULL;
1088
1089 net_client_init(opts, 0, &local_err);
1090 if (error_is_set(&local_err)) {
1091 qerror_report_err(local_err);
1092 error_free(local_err);
1093 return -1;
1094 }
1095
1096 return 0;
1097 }
1098
1099 static int net_init_netdev(QemuOpts *opts, void *dummy)
1100 {
1101 Error *local_err = NULL;
1102 int ret;
1103
1104 ret = net_client_init(opts, 1, &local_err);
1105 if (error_is_set(&local_err)) {
1106 qerror_report_err(local_err);
1107 error_free(local_err);
1108 return -1;
1109 }
1110
1111 return ret;
1112 }
1113
1114 int net_init_clients(void)
1115 {
1116 QemuOptsList *net = qemu_find_opts("net");
1117
1118 if (default_net) {
1119 /* if no clients, we use a default config */
1120 qemu_opts_set(net, NULL, "type", "nic");
1121 #ifdef CONFIG_SLIRP
1122 qemu_opts_set(net, NULL, "type", "user");
1123 #endif
1124 }
1125
1126 QTAILQ_INIT(&net_clients);
1127
1128 if (qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL, 1) == -1)
1129 return -1;
1130
1131 if (qemu_opts_foreach(net, net_init_client, NULL, 1) == -1) {
1132 return -1;
1133 }
1134
1135 return 0;
1136 }
1137
1138 int net_client_parse(QemuOptsList *opts_list, const char *optarg)
1139 {
1140 #if defined(CONFIG_SLIRP)
1141 int ret;
1142 if (net_slirp_parse_legacy(opts_list, optarg, &ret)) {
1143 return ret;
1144 }
1145 #endif
1146
1147 if (!qemu_opts_parse(opts_list, optarg, 1)) {
1148 return -1;
1149 }
1150
1151 default_net = 0;
1152 return 0;
1153 }
1154
1155 /* From FreeBSD */
1156 /* XXX: optimize */
1157 unsigned compute_mcast_idx(const uint8_t *ep)
1158 {
1159 uint32_t crc;
1160 int carry, i, j;
1161 uint8_t b;
1162
1163 crc = 0xffffffff;
1164 for (i = 0; i < 6; i++) {
1165 b = *ep++;
1166 for (j = 0; j < 8; j++) {
1167 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
1168 crc <<= 1;
1169 b >>= 1;
1170 if (carry) {
1171 crc = ((crc ^ POLYNOMIAL) | carry);
1172 }
1173 }
1174 }
1175 return crc >> 26;
1176 }
1177
1178 QemuOptsList qemu_netdev_opts = {
1179 .name = "netdev",
1180 .implied_opt_name = "type",
1181 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
1182 .desc = {
1183 /*
1184 * no elements => accept any params
1185 * validation will happen later
1186 */
1187 { /* end of list */ }
1188 },
1189 };
1190
1191 QemuOptsList qemu_net_opts = {
1192 .name = "net",
1193 .implied_opt_name = "type",
1194 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
1195 .desc = {
1196 /*
1197 * no elements => accept any params
1198 * validation will happen later
1199 */
1200 { /* end of list */ }
1201 },
1202 };