Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging
[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 "net/eth.h"
31 #include "util.h"
32
33 #include "monitor/monitor.h"
34 #include "qemu-common.h"
35 #include "qemu/sockets.h"
36 #include "qemu/config-file.h"
37 #include "qmp-commands.h"
38 #include "hw/qdev.h"
39 #include "qemu/iov.h"
40 #include "qemu/main-loop.h"
41 #include "qapi-visit.h"
42 #include "qapi/opts-visitor.h"
43 #include "qapi/dealloc-visitor.h"
44
45 /* Net bridge is currently not supported for W32. */
46 #if !defined(_WIN32)
47 # define CONFIG_NET_BRIDGE
48 #endif
49
50 static QTAILQ_HEAD(, NetClientState) net_clients;
51
52 int default_net = 1;
53
54 /***********************************************************/
55 /* network device redirectors */
56
57 #if defined(DEBUG_NET)
58 static void hex_dump(FILE *f, const uint8_t *buf, int size)
59 {
60 int len, i, j, c;
61
62 for(i=0;i<size;i+=16) {
63 len = size - i;
64 if (len > 16)
65 len = 16;
66 fprintf(f, "%08x ", i);
67 for(j=0;j<16;j++) {
68 if (j < len)
69 fprintf(f, " %02x", buf[i+j]);
70 else
71 fprintf(f, " ");
72 }
73 fprintf(f, " ");
74 for(j=0;j<len;j++) {
75 c = buf[i+j];
76 if (c < ' ' || c > '~')
77 c = '.';
78 fprintf(f, "%c", c);
79 }
80 fprintf(f, "\n");
81 }
82 }
83 #endif
84
85 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
86 {
87 const char *p, *p1;
88 int len;
89 p = *pp;
90 p1 = strchr(p, sep);
91 if (!p1)
92 return -1;
93 len = p1 - p;
94 p1++;
95 if (buf_size > 0) {
96 if (len > buf_size - 1)
97 len = buf_size - 1;
98 memcpy(buf, p, len);
99 buf[len] = '\0';
100 }
101 *pp = p1;
102 return 0;
103 }
104
105 int parse_host_port(struct sockaddr_in *saddr, const char *str)
106 {
107 char buf[512];
108 struct hostent *he;
109 const char *p, *r;
110 int port;
111
112 p = str;
113 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
114 return -1;
115 saddr->sin_family = AF_INET;
116 if (buf[0] == '\0') {
117 saddr->sin_addr.s_addr = 0;
118 } else {
119 if (qemu_isdigit(buf[0])) {
120 if (!inet_aton(buf, &saddr->sin_addr))
121 return -1;
122 } else {
123 if ((he = gethostbyname(buf)) == NULL)
124 return - 1;
125 saddr->sin_addr = *(struct in_addr *)he->h_addr;
126 }
127 }
128 port = strtol(p, (char **)&r, 0);
129 if (r == p)
130 return -1;
131 saddr->sin_port = htons(port);
132 return 0;
133 }
134
135 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6])
136 {
137 snprintf(nc->info_str, sizeof(nc->info_str),
138 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
139 nc->model,
140 macaddr[0], macaddr[1], macaddr[2],
141 macaddr[3], macaddr[4], macaddr[5]);
142 }
143
144 void qemu_macaddr_default_if_unset(MACAddr *macaddr)
145 {
146 static int index = 0;
147 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } };
148
149 if (memcmp(macaddr, &zero, sizeof(zero)) != 0)
150 return;
151 macaddr->a[0] = 0x52;
152 macaddr->a[1] = 0x54;
153 macaddr->a[2] = 0x00;
154 macaddr->a[3] = 0x12;
155 macaddr->a[4] = 0x34;
156 macaddr->a[5] = 0x56 + index++;
157 }
158
159 /**
160 * Generate a name for net client
161 *
162 * Only net clients created with the legacy -net option and NICs need this.
163 */
164 static char *assign_name(NetClientState *nc1, const char *model)
165 {
166 NetClientState *nc;
167 int id = 0;
168
169 QTAILQ_FOREACH(nc, &net_clients, next) {
170 if (nc == nc1) {
171 continue;
172 }
173 if (strcmp(nc->model, model) == 0) {
174 id++;
175 }
176 }
177
178 return g_strdup_printf("%s.%d", model, id);
179 }
180
181 static void qemu_net_client_destructor(NetClientState *nc)
182 {
183 g_free(nc);
184 }
185
186 static void qemu_net_client_setup(NetClientState *nc,
187 NetClientInfo *info,
188 NetClientState *peer,
189 const char *model,
190 const char *name,
191 NetClientDestructor *destructor)
192 {
193 nc->info = info;
194 nc->model = g_strdup(model);
195 if (name) {
196 nc->name = g_strdup(name);
197 } else {
198 nc->name = assign_name(nc, model);
199 }
200
201 if (peer) {
202 assert(!peer->peer);
203 nc->peer = peer;
204 peer->peer = nc;
205 }
206 QTAILQ_INSERT_TAIL(&net_clients, nc, next);
207
208 nc->incoming_queue = qemu_new_net_queue(nc);
209 nc->destructor = destructor;
210 }
211
212 NetClientState *qemu_new_net_client(NetClientInfo *info,
213 NetClientState *peer,
214 const char *model,
215 const char *name)
216 {
217 NetClientState *nc;
218
219 assert(info->size >= sizeof(NetClientState));
220
221 nc = g_malloc0(info->size);
222 qemu_net_client_setup(nc, info, peer, model, name,
223 qemu_net_client_destructor);
224
225 return nc;
226 }
227
228 NICState *qemu_new_nic(NetClientInfo *info,
229 NICConf *conf,
230 const char *model,
231 const char *name,
232 void *opaque)
233 {
234 NetClientState **peers = conf->peers.ncs;
235 NICState *nic;
236 int i, queues = MAX(1, conf->queues);
237
238 assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC);
239 assert(info->size >= sizeof(NICState));
240
241 nic = g_malloc0(info->size + sizeof(NetClientState) * queues);
242 nic->ncs = (void *)nic + info->size;
243 nic->conf = conf;
244 nic->opaque = opaque;
245
246 for (i = 0; i < queues; i++) {
247 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name,
248 NULL);
249 nic->ncs[i].queue_index = i;
250 }
251
252 return nic;
253 }
254
255 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index)
256 {
257 return nic->ncs + queue_index;
258 }
259
260 NetClientState *qemu_get_queue(NICState *nic)
261 {
262 return qemu_get_subqueue(nic, 0);
263 }
264
265 NICState *qemu_get_nic(NetClientState *nc)
266 {
267 NetClientState *nc0 = nc - nc->queue_index;
268
269 return (NICState *)((void *)nc0 - nc->info->size);
270 }
271
272 void *qemu_get_nic_opaque(NetClientState *nc)
273 {
274 NICState *nic = qemu_get_nic(nc);
275
276 return nic->opaque;
277 }
278
279 static void qemu_cleanup_net_client(NetClientState *nc)
280 {
281 QTAILQ_REMOVE(&net_clients, nc, next);
282
283 if (nc->info->cleanup) {
284 nc->info->cleanup(nc);
285 }
286 }
287
288 static void qemu_free_net_client(NetClientState *nc)
289 {
290 if (nc->incoming_queue) {
291 qemu_del_net_queue(nc->incoming_queue);
292 }
293 if (nc->peer) {
294 nc->peer->peer = NULL;
295 }
296 g_free(nc->name);
297 g_free(nc->model);
298 if (nc->destructor) {
299 nc->destructor(nc);
300 }
301 }
302
303 void qemu_del_net_client(NetClientState *nc)
304 {
305 NetClientState *ncs[MAX_QUEUE_NUM];
306 int queues, i;
307
308 /* If the NetClientState belongs to a multiqueue backend, we will change all
309 * other NetClientStates also.
310 */
311 queues = qemu_find_net_clients_except(nc->name, ncs,
312 NET_CLIENT_OPTIONS_KIND_NIC,
313 MAX_QUEUE_NUM);
314 assert(queues != 0);
315
316 /* If there is a peer NIC, delete and cleanup client, but do not free. */
317 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
318 NICState *nic = qemu_get_nic(nc->peer);
319 if (nic->peer_deleted) {
320 return;
321 }
322 nic->peer_deleted = true;
323
324 for (i = 0; i < queues; i++) {
325 ncs[i]->peer->link_down = true;
326 }
327
328 if (nc->peer->info->link_status_changed) {
329 nc->peer->info->link_status_changed(nc->peer);
330 }
331
332 for (i = 0; i < queues; i++) {
333 qemu_cleanup_net_client(ncs[i]);
334 }
335
336 return;
337 }
338
339 assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC);
340
341 for (i = 0; i < queues; i++) {
342 qemu_cleanup_net_client(ncs[i]);
343 qemu_free_net_client(ncs[i]);
344 }
345 }
346
347 void qemu_del_nic(NICState *nic)
348 {
349 int i, queues = MAX(nic->conf->queues, 1);
350
351 /* If this is a peer NIC and peer has already been deleted, free it now. */
352 if (nic->peer_deleted) {
353 for (i = 0; i < queues; i++) {
354 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer);
355 }
356 }
357
358 for (i = queues - 1; i >= 0; i--) {
359 NetClientState *nc = qemu_get_subqueue(nic, i);
360
361 qemu_cleanup_net_client(nc);
362 qemu_free_net_client(nc);
363 }
364
365 g_free(nic);
366 }
367
368 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque)
369 {
370 NetClientState *nc;
371
372 QTAILQ_FOREACH(nc, &net_clients, next) {
373 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
374 if (nc->queue_index == 0) {
375 func(qemu_get_nic(nc), opaque);
376 }
377 }
378 }
379 }
380
381 bool qemu_has_ufo(NetClientState *nc)
382 {
383 if (!nc || !nc->info->has_ufo) {
384 return false;
385 }
386
387 return nc->info->has_ufo(nc);
388 }
389
390 bool qemu_has_vnet_hdr(NetClientState *nc)
391 {
392 if (!nc || !nc->info->has_vnet_hdr) {
393 return false;
394 }
395
396 return nc->info->has_vnet_hdr(nc);
397 }
398
399 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len)
400 {
401 if (!nc || !nc->info->has_vnet_hdr_len) {
402 return false;
403 }
404
405 return nc->info->has_vnet_hdr_len(nc, len);
406 }
407
408 void qemu_using_vnet_hdr(NetClientState *nc, bool enable)
409 {
410 if (!nc || !nc->info->using_vnet_hdr) {
411 return;
412 }
413
414 nc->info->using_vnet_hdr(nc, enable);
415 }
416
417 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6,
418 int ecn, int ufo)
419 {
420 if (!nc || !nc->info->set_offload) {
421 return;
422 }
423
424 nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo);
425 }
426
427 void qemu_set_vnet_hdr_len(NetClientState *nc, int len)
428 {
429 if (!nc || !nc->info->set_vnet_hdr_len) {
430 return;
431 }
432
433 nc->info->set_vnet_hdr_len(nc, len);
434 }
435
436 int qemu_can_send_packet(NetClientState *sender)
437 {
438 if (!sender->peer) {
439 return 1;
440 }
441
442 if (sender->peer->receive_disabled) {
443 return 0;
444 } else if (sender->peer->info->can_receive &&
445 !sender->peer->info->can_receive(sender->peer)) {
446 return 0;
447 }
448 return 1;
449 }
450
451 ssize_t qemu_deliver_packet(NetClientState *sender,
452 unsigned flags,
453 const uint8_t *data,
454 size_t size,
455 void *opaque)
456 {
457 NetClientState *nc = opaque;
458 ssize_t ret;
459
460 if (nc->link_down) {
461 return size;
462 }
463
464 if (nc->receive_disabled) {
465 return 0;
466 }
467
468 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) {
469 ret = nc->info->receive_raw(nc, data, size);
470 } else {
471 ret = nc->info->receive(nc, data, size);
472 }
473
474 if (ret == 0) {
475 nc->receive_disabled = 1;
476 };
477
478 return ret;
479 }
480
481 void qemu_purge_queued_packets(NetClientState *nc)
482 {
483 if (!nc->peer) {
484 return;
485 }
486
487 qemu_net_queue_purge(nc->peer->incoming_queue, nc);
488 }
489
490 void qemu_flush_queued_packets(NetClientState *nc)
491 {
492 nc->receive_disabled = 0;
493
494 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) {
495 if (net_hub_flush(nc->peer)) {
496 qemu_notify_event();
497 }
498 }
499 if (qemu_net_queue_flush(nc->incoming_queue)) {
500 /* We emptied the queue successfully, signal to the IO thread to repoll
501 * the file descriptor (for tap, for example).
502 */
503 qemu_notify_event();
504 }
505 }
506
507 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender,
508 unsigned flags,
509 const uint8_t *buf, int size,
510 NetPacketSent *sent_cb)
511 {
512 NetQueue *queue;
513
514 #ifdef DEBUG_NET
515 printf("qemu_send_packet_async:\n");
516 hex_dump(stdout, buf, size);
517 #endif
518
519 if (sender->link_down || !sender->peer) {
520 return size;
521 }
522
523 queue = sender->peer->incoming_queue;
524
525 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb);
526 }
527
528 ssize_t qemu_send_packet_async(NetClientState *sender,
529 const uint8_t *buf, int size,
530 NetPacketSent *sent_cb)
531 {
532 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE,
533 buf, size, sent_cb);
534 }
535
536 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size)
537 {
538 qemu_send_packet_async(nc, buf, size, NULL);
539 }
540
541 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size)
542 {
543 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW,
544 buf, size, NULL);
545 }
546
547 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov,
548 int iovcnt)
549 {
550 uint8_t buffer[NET_BUFSIZE];
551 size_t offset;
552
553 offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer));
554
555 return nc->info->receive(nc, buffer, offset);
556 }
557
558 ssize_t qemu_deliver_packet_iov(NetClientState *sender,
559 unsigned flags,
560 const struct iovec *iov,
561 int iovcnt,
562 void *opaque)
563 {
564 NetClientState *nc = opaque;
565 int ret;
566
567 if (nc->link_down) {
568 return iov_size(iov, iovcnt);
569 }
570
571 if (nc->receive_disabled) {
572 return 0;
573 }
574
575 if (nc->info->receive_iov) {
576 ret = nc->info->receive_iov(nc, iov, iovcnt);
577 } else {
578 ret = nc_sendv_compat(nc, iov, iovcnt);
579 }
580
581 if (ret == 0) {
582 nc->receive_disabled = 1;
583 }
584
585 return ret;
586 }
587
588 ssize_t qemu_sendv_packet_async(NetClientState *sender,
589 const struct iovec *iov, int iovcnt,
590 NetPacketSent *sent_cb)
591 {
592 NetQueue *queue;
593
594 if (sender->link_down || !sender->peer) {
595 return iov_size(iov, iovcnt);
596 }
597
598 queue = sender->peer->incoming_queue;
599
600 return qemu_net_queue_send_iov(queue, sender,
601 QEMU_NET_PACKET_FLAG_NONE,
602 iov, iovcnt, sent_cb);
603 }
604
605 ssize_t
606 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt)
607 {
608 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL);
609 }
610
611 NetClientState *qemu_find_netdev(const char *id)
612 {
613 NetClientState *nc;
614
615 QTAILQ_FOREACH(nc, &net_clients, next) {
616 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC)
617 continue;
618 if (!strcmp(nc->name, id)) {
619 return nc;
620 }
621 }
622
623 return NULL;
624 }
625
626 int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
627 NetClientOptionsKind type, int max)
628 {
629 NetClientState *nc;
630 int ret = 0;
631
632 QTAILQ_FOREACH(nc, &net_clients, next) {
633 if (nc->info->type == type) {
634 continue;
635 }
636 if (!strcmp(nc->name, id)) {
637 if (ret < max) {
638 ncs[ret] = nc;
639 }
640 ret++;
641 }
642 }
643
644 return ret;
645 }
646
647 static int nic_get_free_idx(void)
648 {
649 int index;
650
651 for (index = 0; index < MAX_NICS; index++)
652 if (!nd_table[index].used)
653 return index;
654 return -1;
655 }
656
657 int qemu_show_nic_models(const char *arg, const char *const *models)
658 {
659 int i;
660
661 if (!arg || !is_help_option(arg)) {
662 return 0;
663 }
664
665 fprintf(stderr, "qemu: Supported NIC models: ");
666 for (i = 0 ; models[i]; i++)
667 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
668 return 1;
669 }
670
671 void qemu_check_nic_model(NICInfo *nd, const char *model)
672 {
673 const char *models[2];
674
675 models[0] = model;
676 models[1] = NULL;
677
678 if (qemu_show_nic_models(nd->model, models))
679 exit(0);
680 if (qemu_find_nic_model(nd, models, model) < 0)
681 exit(1);
682 }
683
684 int qemu_find_nic_model(NICInfo *nd, const char * const *models,
685 const char *default_model)
686 {
687 int i;
688
689 if (!nd->model)
690 nd->model = g_strdup(default_model);
691
692 for (i = 0 ; models[i]; i++) {
693 if (strcmp(nd->model, models[i]) == 0)
694 return i;
695 }
696
697 error_report("Unsupported NIC model: %s", nd->model);
698 return -1;
699 }
700
701 static int net_init_nic(const NetClientOptions *opts, const char *name,
702 NetClientState *peer)
703 {
704 int idx;
705 NICInfo *nd;
706 const NetLegacyNicOptions *nic;
707
708 assert(opts->kind == NET_CLIENT_OPTIONS_KIND_NIC);
709 nic = opts->nic;
710
711 idx = nic_get_free_idx();
712 if (idx == -1 || nb_nics >= MAX_NICS) {
713 error_report("Too Many NICs");
714 return -1;
715 }
716
717 nd = &nd_table[idx];
718
719 memset(nd, 0, sizeof(*nd));
720
721 if (nic->has_netdev) {
722 nd->netdev = qemu_find_netdev(nic->netdev);
723 if (!nd->netdev) {
724 error_report("netdev '%s' not found", nic->netdev);
725 return -1;
726 }
727 } else {
728 assert(peer);
729 nd->netdev = peer;
730 }
731 nd->name = g_strdup(name);
732 if (nic->has_model) {
733 nd->model = g_strdup(nic->model);
734 }
735 if (nic->has_addr) {
736 nd->devaddr = g_strdup(nic->addr);
737 }
738
739 if (nic->has_macaddr &&
740 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) {
741 error_report("invalid syntax for ethernet address");
742 return -1;
743 }
744 if (nic->has_macaddr &&
745 is_multicast_ether_addr(nd->macaddr.a)) {
746 error_report("NIC cannot have multicast MAC address (odd 1st byte)");
747 return -1;
748 }
749 qemu_macaddr_default_if_unset(&nd->macaddr);
750
751 if (nic->has_vectors) {
752 if (nic->vectors > 0x7ffffff) {
753 error_report("invalid # of vectors: %"PRIu32, nic->vectors);
754 return -1;
755 }
756 nd->nvectors = nic->vectors;
757 } else {
758 nd->nvectors = DEV_NVECTORS_UNSPECIFIED;
759 }
760
761 nd->used = 1;
762 nb_nics++;
763
764 return idx;
765 }
766
767
768 static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])(
769 const NetClientOptions *opts,
770 const char *name,
771 NetClientState *peer) = {
772 [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic,
773 #ifdef CONFIG_SLIRP
774 [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp,
775 #endif
776 [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap,
777 [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket,
778 #ifdef CONFIG_VDE
779 [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde,
780 #endif
781 #ifdef CONFIG_NETMAP
782 [NET_CLIENT_OPTIONS_KIND_NETMAP] = net_init_netmap,
783 #endif
784 [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump,
785 #ifdef CONFIG_NET_BRIDGE
786 [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge,
787 #endif
788 [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport,
789 };
790
791
792 static int net_client_init1(const void *object, int is_netdev, Error **errp)
793 {
794 union {
795 const Netdev *netdev;
796 const NetLegacy *net;
797 } u;
798 const NetClientOptions *opts;
799 const char *name;
800
801 if (is_netdev) {
802 u.netdev = object;
803 opts = u.netdev->opts;
804 name = u.netdev->id;
805
806 switch (opts->kind) {
807 #ifdef CONFIG_SLIRP
808 case NET_CLIENT_OPTIONS_KIND_USER:
809 #endif
810 case NET_CLIENT_OPTIONS_KIND_TAP:
811 case NET_CLIENT_OPTIONS_KIND_SOCKET:
812 #ifdef CONFIG_VDE
813 case NET_CLIENT_OPTIONS_KIND_VDE:
814 #endif
815 #ifdef CONFIG_NETMAP
816 case NET_CLIENT_OPTIONS_KIND_NETMAP:
817 #endif
818 #ifdef CONFIG_NET_BRIDGE
819 case NET_CLIENT_OPTIONS_KIND_BRIDGE:
820 #endif
821 case NET_CLIENT_OPTIONS_KIND_HUBPORT:
822 break;
823
824 default:
825 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type",
826 "a netdev backend type");
827 return -1;
828 }
829 } else {
830 u.net = object;
831 opts = u.net->opts;
832 /* missing optional values have been initialized to "all bits zero" */
833 name = u.net->has_id ? u.net->id : u.net->name;
834 }
835
836 if (net_client_init_fun[opts->kind]) {
837 NetClientState *peer = NULL;
838
839 /* Do not add to a vlan if it's a -netdev or a nic with a netdev=
840 * parameter. */
841 if (!is_netdev &&
842 (opts->kind != NET_CLIENT_OPTIONS_KIND_NIC ||
843 !opts->nic->has_netdev)) {
844 peer = net_hub_add_port(u.net->has_vlan ? u.net->vlan : 0, NULL);
845 }
846
847 if (net_client_init_fun[opts->kind](opts, name, peer) < 0) {
848 /* TODO push error reporting into init() methods */
849 error_set(errp, QERR_DEVICE_INIT_FAILED,
850 NetClientOptionsKind_lookup[opts->kind]);
851 return -1;
852 }
853 }
854 return 0;
855 }
856
857
858 static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp)
859 {
860 if (is_netdev) {
861 visit_type_Netdev(v, (Netdev **)object, NULL, errp);
862 } else {
863 visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp);
864 }
865 }
866
867
868 int net_client_init(QemuOpts *opts, int is_netdev, Error **errp)
869 {
870 void *object = NULL;
871 Error *err = NULL;
872 int ret = -1;
873
874 {
875 OptsVisitor *ov = opts_visitor_new(opts);
876
877 net_visit(opts_get_visitor(ov), is_netdev, &object, &err);
878 opts_visitor_cleanup(ov);
879 }
880
881 if (!err) {
882 ret = net_client_init1(object, is_netdev, &err);
883 }
884
885 if (object) {
886 QapiDeallocVisitor *dv = qapi_dealloc_visitor_new();
887
888 net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL);
889 qapi_dealloc_visitor_cleanup(dv);
890 }
891
892 error_propagate(errp, err);
893 return ret;
894 }
895
896
897 static int net_host_check_device(const char *device)
898 {
899 int i;
900 const char *valid_param_list[] = { "tap", "socket", "dump"
901 #ifdef CONFIG_NET_BRIDGE
902 , "bridge"
903 #endif
904 #ifdef CONFIG_SLIRP
905 ,"user"
906 #endif
907 #ifdef CONFIG_VDE
908 ,"vde"
909 #endif
910 };
911 for (i = 0; i < ARRAY_SIZE(valid_param_list); i++) {
912 if (!strncmp(valid_param_list[i], device,
913 strlen(valid_param_list[i])))
914 return 1;
915 }
916
917 return 0;
918 }
919
920 void net_host_device_add(Monitor *mon, const QDict *qdict)
921 {
922 const char *device = qdict_get_str(qdict, "device");
923 const char *opts_str = qdict_get_try_str(qdict, "opts");
924 Error *local_err = NULL;
925 QemuOpts *opts;
926
927 if (!net_host_check_device(device)) {
928 monitor_printf(mon, "invalid host network device %s\n", device);
929 return;
930 }
931
932 opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0);
933 if (!opts) {
934 return;
935 }
936
937 qemu_opt_set(opts, "type", device);
938
939 net_client_init(opts, 0, &local_err);
940 if (local_err) {
941 qerror_report_err(local_err);
942 error_free(local_err);
943 monitor_printf(mon, "adding host network device %s failed\n", device);
944 }
945 }
946
947 void net_host_device_remove(Monitor *mon, const QDict *qdict)
948 {
949 NetClientState *nc;
950 int vlan_id = qdict_get_int(qdict, "vlan_id");
951 const char *device = qdict_get_str(qdict, "device");
952
953 nc = net_hub_find_client_by_name(vlan_id, device);
954 if (!nc) {
955 return;
956 }
957 if (!net_host_check_device(nc->model)) {
958 monitor_printf(mon, "invalid host network device %s\n", device);
959 return;
960 }
961 qemu_del_net_client(nc);
962 }
963
964 void netdev_add(QemuOpts *opts, Error **errp)
965 {
966 net_client_init(opts, 1, errp);
967 }
968
969 int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret)
970 {
971 Error *local_err = NULL;
972 QemuOptsList *opts_list;
973 QemuOpts *opts;
974
975 opts_list = qemu_find_opts_err("netdev", &local_err);
976 if (local_err) {
977 goto exit_err;
978 }
979
980 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err);
981 if (local_err) {
982 goto exit_err;
983 }
984
985 netdev_add(opts, &local_err);
986 if (local_err) {
987 qemu_opts_del(opts);
988 goto exit_err;
989 }
990
991 return 0;
992
993 exit_err:
994 qerror_report_err(local_err);
995 error_free(local_err);
996 return -1;
997 }
998
999 void qmp_netdev_del(const char *id, Error **errp)
1000 {
1001 NetClientState *nc;
1002 QemuOpts *opts;
1003
1004 nc = qemu_find_netdev(id);
1005 if (!nc) {
1006 error_set(errp, QERR_DEVICE_NOT_FOUND, id);
1007 return;
1008 }
1009
1010 opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id);
1011 if (!opts) {
1012 error_setg(errp, "Device '%s' is not a netdev", id);
1013 return;
1014 }
1015
1016 qemu_del_net_client(nc);
1017 qemu_opts_del(opts);
1018 }
1019
1020 void print_net_client(Monitor *mon, NetClientState *nc)
1021 {
1022 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name,
1023 nc->queue_index,
1024 NetClientOptionsKind_lookup[nc->info->type],
1025 nc->info_str);
1026 }
1027
1028 RxFilterInfoList *qmp_query_rx_filter(bool has_name, const char *name,
1029 Error **errp)
1030 {
1031 NetClientState *nc;
1032 RxFilterInfoList *filter_list = NULL, *last_entry = NULL;
1033
1034 QTAILQ_FOREACH(nc, &net_clients, next) {
1035 RxFilterInfoList *entry;
1036 RxFilterInfo *info;
1037
1038 if (has_name && strcmp(nc->name, name) != 0) {
1039 continue;
1040 }
1041
1042 /* only query rx-filter information of NIC */
1043 if (nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC) {
1044 if (has_name) {
1045 error_setg(errp, "net client(%s) isn't a NIC", name);
1046 break;
1047 }
1048 continue;
1049 }
1050
1051 if (nc->info->query_rx_filter) {
1052 info = nc->info->query_rx_filter(nc);
1053 entry = g_malloc0(sizeof(*entry));
1054 entry->value = info;
1055
1056 if (!filter_list) {
1057 filter_list = entry;
1058 } else {
1059 last_entry->next = entry;
1060 }
1061 last_entry = entry;
1062 } else if (has_name) {
1063 error_setg(errp, "net client(%s) doesn't support"
1064 " rx-filter querying", name);
1065 break;
1066 }
1067 }
1068
1069 if (filter_list == NULL && !error_is_set(errp) && has_name) {
1070 error_setg(errp, "invalid net client name: %s", name);
1071 }
1072
1073 return filter_list;
1074 }
1075
1076 void do_info_network(Monitor *mon, const QDict *qdict)
1077 {
1078 NetClientState *nc, *peer;
1079 NetClientOptionsKind type;
1080
1081 net_hub_info(mon);
1082
1083 QTAILQ_FOREACH(nc, &net_clients, next) {
1084 peer = nc->peer;
1085 type = nc->info->type;
1086
1087 /* Skip if already printed in hub info */
1088 if (net_hub_id_for_client(nc, NULL) == 0) {
1089 continue;
1090 }
1091
1092 if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) {
1093 print_net_client(mon, nc);
1094 } /* else it's a netdev connected to a NIC, printed with the NIC */
1095 if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) {
1096 monitor_printf(mon, " \\ ");
1097 print_net_client(mon, peer);
1098 }
1099 }
1100 }
1101
1102 void qmp_set_link(const char *name, bool up, Error **errp)
1103 {
1104 NetClientState *ncs[MAX_QUEUE_NUM];
1105 NetClientState *nc;
1106 int queues, i;
1107
1108 queues = qemu_find_net_clients_except(name, ncs,
1109 NET_CLIENT_OPTIONS_KIND_MAX,
1110 MAX_QUEUE_NUM);
1111
1112 if (queues == 0) {
1113 error_set(errp, QERR_DEVICE_NOT_FOUND, name);
1114 return;
1115 }
1116 nc = ncs[0];
1117
1118 for (i = 0; i < queues; i++) {
1119 ncs[i]->link_down = !up;
1120 }
1121
1122 if (nc->info->link_status_changed) {
1123 nc->info->link_status_changed(nc);
1124 }
1125
1126 if (nc->peer) {
1127 /* Change peer link only if the peer is NIC and then notify peer.
1128 * If the peer is a HUBPORT or a backend, we do not change the
1129 * link status.
1130 *
1131 * This behavior is compatible with qemu vlans where there could be
1132 * multiple clients that can still communicate with each other in
1133 * disconnected mode. For now maintain this compatibility.
1134 */
1135 if (nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
1136 for (i = 0; i < queues; i++) {
1137 ncs[i]->peer->link_down = !up;
1138 }
1139 }
1140 if (nc->peer->info->link_status_changed) {
1141 nc->peer->info->link_status_changed(nc->peer);
1142 }
1143 }
1144 }
1145
1146 void net_cleanup(void)
1147 {
1148 NetClientState *nc;
1149
1150 /* We may del multiple entries during qemu_del_net_client(),
1151 * so QTAILQ_FOREACH_SAFE() is also not safe here.
1152 */
1153 while (!QTAILQ_EMPTY(&net_clients)) {
1154 nc = QTAILQ_FIRST(&net_clients);
1155 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
1156 qemu_del_nic(qemu_get_nic(nc));
1157 } else {
1158 qemu_del_net_client(nc);
1159 }
1160 }
1161 }
1162
1163 void net_check_clients(void)
1164 {
1165 NetClientState *nc;
1166 int i;
1167
1168 /* Don't warn about the default network setup that you get if
1169 * no command line -net or -netdev options are specified. There
1170 * are two cases that we would otherwise complain about:
1171 * (1) board doesn't support a NIC but the implicit "-net nic"
1172 * requested one
1173 * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic"
1174 * sets up a nic that isn't connected to anything.
1175 */
1176 if (default_net) {
1177 return;
1178 }
1179
1180 net_hub_check_clients();
1181
1182 QTAILQ_FOREACH(nc, &net_clients, next) {
1183 if (!nc->peer) {
1184 fprintf(stderr, "Warning: %s %s has no peer\n",
1185 nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ?
1186 "nic" : "netdev", nc->name);
1187 }
1188 }
1189
1190 /* Check that all NICs requested via -net nic actually got created.
1191 * NICs created via -device don't need to be checked here because
1192 * they are always instantiated.
1193 */
1194 for (i = 0; i < MAX_NICS; i++) {
1195 NICInfo *nd = &nd_table[i];
1196 if (nd->used && !nd->instantiated) {
1197 fprintf(stderr, "Warning: requested NIC (%s, model %s) "
1198 "was not created (not supported by this machine?)\n",
1199 nd->name ? nd->name : "anonymous",
1200 nd->model ? nd->model : "unspecified");
1201 }
1202 }
1203 }
1204
1205 static int net_init_client(QemuOpts *opts, void *dummy)
1206 {
1207 Error *local_err = NULL;
1208
1209 net_client_init(opts, 0, &local_err);
1210 if (local_err) {
1211 qerror_report_err(local_err);
1212 error_free(local_err);
1213 return -1;
1214 }
1215
1216 return 0;
1217 }
1218
1219 static int net_init_netdev(QemuOpts *opts, void *dummy)
1220 {
1221 Error *local_err = NULL;
1222 int ret;
1223
1224 ret = net_client_init(opts, 1, &local_err);
1225 if (local_err) {
1226 qerror_report_err(local_err);
1227 error_free(local_err);
1228 return -1;
1229 }
1230
1231 return ret;
1232 }
1233
1234 int net_init_clients(void)
1235 {
1236 QemuOptsList *net = qemu_find_opts("net");
1237
1238 if (default_net) {
1239 /* if no clients, we use a default config */
1240 qemu_opts_set(net, NULL, "type", "nic");
1241 #ifdef CONFIG_SLIRP
1242 qemu_opts_set(net, NULL, "type", "user");
1243 #endif
1244 }
1245
1246 QTAILQ_INIT(&net_clients);
1247
1248 if (qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL, 1) == -1)
1249 return -1;
1250
1251 if (qemu_opts_foreach(net, net_init_client, NULL, 1) == -1) {
1252 return -1;
1253 }
1254
1255 return 0;
1256 }
1257
1258 int net_client_parse(QemuOptsList *opts_list, const char *optarg)
1259 {
1260 #if defined(CONFIG_SLIRP)
1261 int ret;
1262 if (net_slirp_parse_legacy(opts_list, optarg, &ret)) {
1263 return ret;
1264 }
1265 #endif
1266
1267 if (!qemu_opts_parse(opts_list, optarg, 1)) {
1268 return -1;
1269 }
1270
1271 default_net = 0;
1272 return 0;
1273 }
1274
1275 /* From FreeBSD */
1276 /* XXX: optimize */
1277 unsigned compute_mcast_idx(const uint8_t *ep)
1278 {
1279 uint32_t crc;
1280 int carry, i, j;
1281 uint8_t b;
1282
1283 crc = 0xffffffff;
1284 for (i = 0; i < 6; i++) {
1285 b = *ep++;
1286 for (j = 0; j < 8; j++) {
1287 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
1288 crc <<= 1;
1289 b >>= 1;
1290 if (carry) {
1291 crc = ((crc ^ POLYNOMIAL) | carry);
1292 }
1293 }
1294 }
1295 return crc >> 26;
1296 }
1297
1298 QemuOptsList qemu_netdev_opts = {
1299 .name = "netdev",
1300 .implied_opt_name = "type",
1301 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
1302 .desc = {
1303 /*
1304 * no elements => accept any params
1305 * validation will happen later
1306 */
1307 { /* end of list */ }
1308 },
1309 };
1310
1311 QemuOptsList qemu_net_opts = {
1312 .name = "net",
1313 .implied_opt_name = "type",
1314 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
1315 .desc = {
1316 /*
1317 * no elements => accept any params
1318 * validation will happen later
1319 */
1320 { /* end of list */ }
1321 },
1322 };