mips: Set the CP0.Config3.DSP and CP0.Config3.DSP2P bits
[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 #include "sysemu/sysemu.h"
45
46 /* Net bridge is currently not supported for W32. */
47 #if !defined(_WIN32)
48 # define CONFIG_NET_BRIDGE
49 #endif
50
51 static VMChangeStateEntry *net_change_state_entry;
52 static QTAILQ_HEAD(, NetClientState) net_clients;
53
54 const char *host_net_devices[] = {
55 "tap",
56 "socket",
57 "dump",
58 #ifdef CONFIG_NET_BRIDGE
59 "bridge",
60 #endif
61 #ifdef CONFIG_SLIRP
62 "user",
63 #endif
64 #ifdef CONFIG_VDE
65 "vde",
66 #endif
67 "vhost-user",
68 NULL,
69 };
70
71 int default_net = 1;
72
73 /***********************************************************/
74 /* network device redirectors */
75
76 #if defined(DEBUG_NET)
77 static void hex_dump(FILE *f, const uint8_t *buf, int size)
78 {
79 int len, i, j, c;
80
81 for(i=0;i<size;i+=16) {
82 len = size - i;
83 if (len > 16)
84 len = 16;
85 fprintf(f, "%08x ", i);
86 for(j=0;j<16;j++) {
87 if (j < len)
88 fprintf(f, " %02x", buf[i+j]);
89 else
90 fprintf(f, " ");
91 }
92 fprintf(f, " ");
93 for(j=0;j<len;j++) {
94 c = buf[i+j];
95 if (c < ' ' || c > '~')
96 c = '.';
97 fprintf(f, "%c", c);
98 }
99 fprintf(f, "\n");
100 }
101 }
102 #endif
103
104 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
105 {
106 const char *p, *p1;
107 int len;
108 p = *pp;
109 p1 = strchr(p, sep);
110 if (!p1)
111 return -1;
112 len = p1 - p;
113 p1++;
114 if (buf_size > 0) {
115 if (len > buf_size - 1)
116 len = buf_size - 1;
117 memcpy(buf, p, len);
118 buf[len] = '\0';
119 }
120 *pp = p1;
121 return 0;
122 }
123
124 int parse_host_port(struct sockaddr_in *saddr, const char *str)
125 {
126 char buf[512];
127 struct hostent *he;
128 const char *p, *r;
129 int port;
130
131 p = str;
132 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
133 return -1;
134 saddr->sin_family = AF_INET;
135 if (buf[0] == '\0') {
136 saddr->sin_addr.s_addr = 0;
137 } else {
138 if (qemu_isdigit(buf[0])) {
139 if (!inet_aton(buf, &saddr->sin_addr))
140 return -1;
141 } else {
142 if ((he = gethostbyname(buf)) == NULL)
143 return - 1;
144 saddr->sin_addr = *(struct in_addr *)he->h_addr;
145 }
146 }
147 port = strtol(p, (char **)&r, 0);
148 if (r == p)
149 return -1;
150 saddr->sin_port = htons(port);
151 return 0;
152 }
153
154 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6])
155 {
156 snprintf(nc->info_str, sizeof(nc->info_str),
157 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
158 nc->model,
159 macaddr[0], macaddr[1], macaddr[2],
160 macaddr[3], macaddr[4], macaddr[5]);
161 }
162
163 void qemu_macaddr_default_if_unset(MACAddr *macaddr)
164 {
165 static int index = 0;
166 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } };
167
168 if (memcmp(macaddr, &zero, sizeof(zero)) != 0)
169 return;
170 macaddr->a[0] = 0x52;
171 macaddr->a[1] = 0x54;
172 macaddr->a[2] = 0x00;
173 macaddr->a[3] = 0x12;
174 macaddr->a[4] = 0x34;
175 macaddr->a[5] = 0x56 + index++;
176 }
177
178 /**
179 * Generate a name for net client
180 *
181 * Only net clients created with the legacy -net option and NICs need this.
182 */
183 static char *assign_name(NetClientState *nc1, const char *model)
184 {
185 NetClientState *nc;
186 int id = 0;
187
188 QTAILQ_FOREACH(nc, &net_clients, next) {
189 if (nc == nc1) {
190 continue;
191 }
192 if (strcmp(nc->model, model) == 0) {
193 id++;
194 }
195 }
196
197 return g_strdup_printf("%s.%d", model, id);
198 }
199
200 static void qemu_net_client_destructor(NetClientState *nc)
201 {
202 g_free(nc);
203 }
204
205 static void qemu_net_client_setup(NetClientState *nc,
206 NetClientInfo *info,
207 NetClientState *peer,
208 const char *model,
209 const char *name,
210 NetClientDestructor *destructor)
211 {
212 nc->info = info;
213 nc->model = g_strdup(model);
214 if (name) {
215 nc->name = g_strdup(name);
216 } else {
217 nc->name = assign_name(nc, model);
218 }
219
220 if (peer) {
221 assert(!peer->peer);
222 nc->peer = peer;
223 peer->peer = nc;
224 }
225 QTAILQ_INSERT_TAIL(&net_clients, nc, next);
226
227 nc->incoming_queue = qemu_new_net_queue(nc);
228 nc->destructor = destructor;
229 }
230
231 NetClientState *qemu_new_net_client(NetClientInfo *info,
232 NetClientState *peer,
233 const char *model,
234 const char *name)
235 {
236 NetClientState *nc;
237
238 assert(info->size >= sizeof(NetClientState));
239
240 nc = g_malloc0(info->size);
241 qemu_net_client_setup(nc, info, peer, model, name,
242 qemu_net_client_destructor);
243
244 return nc;
245 }
246
247 NICState *qemu_new_nic(NetClientInfo *info,
248 NICConf *conf,
249 const char *model,
250 const char *name,
251 void *opaque)
252 {
253 NetClientState **peers = conf->peers.ncs;
254 NICState *nic;
255 int i, queues = MAX(1, conf->peers.queues);
256
257 assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC);
258 assert(info->size >= sizeof(NICState));
259
260 nic = g_malloc0(info->size + sizeof(NetClientState) * queues);
261 nic->ncs = (void *)nic + info->size;
262 nic->conf = conf;
263 nic->opaque = opaque;
264
265 for (i = 0; i < queues; i++) {
266 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name,
267 NULL);
268 nic->ncs[i].queue_index = i;
269 }
270
271 return nic;
272 }
273
274 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index)
275 {
276 return nic->ncs + queue_index;
277 }
278
279 NetClientState *qemu_get_queue(NICState *nic)
280 {
281 return qemu_get_subqueue(nic, 0);
282 }
283
284 NICState *qemu_get_nic(NetClientState *nc)
285 {
286 NetClientState *nc0 = nc - nc->queue_index;
287
288 return (NICState *)((void *)nc0 - nc->info->size);
289 }
290
291 void *qemu_get_nic_opaque(NetClientState *nc)
292 {
293 NICState *nic = qemu_get_nic(nc);
294
295 return nic->opaque;
296 }
297
298 static void qemu_cleanup_net_client(NetClientState *nc)
299 {
300 QTAILQ_REMOVE(&net_clients, nc, next);
301
302 if (nc->info->cleanup) {
303 nc->info->cleanup(nc);
304 }
305 }
306
307 static void qemu_free_net_client(NetClientState *nc)
308 {
309 if (nc->incoming_queue) {
310 qemu_del_net_queue(nc->incoming_queue);
311 }
312 if (nc->peer) {
313 nc->peer->peer = NULL;
314 }
315 g_free(nc->name);
316 g_free(nc->model);
317 if (nc->destructor) {
318 nc->destructor(nc);
319 }
320 }
321
322 void qemu_del_net_client(NetClientState *nc)
323 {
324 NetClientState *ncs[MAX_QUEUE_NUM];
325 int queues, i;
326
327 /* If the NetClientState belongs to a multiqueue backend, we will change all
328 * other NetClientStates also.
329 */
330 queues = qemu_find_net_clients_except(nc->name, ncs,
331 NET_CLIENT_OPTIONS_KIND_NIC,
332 MAX_QUEUE_NUM);
333 assert(queues != 0);
334
335 /* If there is a peer NIC, delete and cleanup client, but do not free. */
336 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
337 NICState *nic = qemu_get_nic(nc->peer);
338 if (nic->peer_deleted) {
339 return;
340 }
341 nic->peer_deleted = true;
342
343 for (i = 0; i < queues; i++) {
344 ncs[i]->peer->link_down = true;
345 }
346
347 if (nc->peer->info->link_status_changed) {
348 nc->peer->info->link_status_changed(nc->peer);
349 }
350
351 for (i = 0; i < queues; i++) {
352 qemu_cleanup_net_client(ncs[i]);
353 }
354
355 return;
356 }
357
358 assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC);
359
360 for (i = 0; i < queues; i++) {
361 qemu_cleanup_net_client(ncs[i]);
362 qemu_free_net_client(ncs[i]);
363 }
364 }
365
366 void qemu_del_nic(NICState *nic)
367 {
368 int i, queues = MAX(nic->conf->peers.queues, 1);
369
370 /* If this is a peer NIC and peer has already been deleted, free it now. */
371 if (nic->peer_deleted) {
372 for (i = 0; i < queues; i++) {
373 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer);
374 }
375 }
376
377 for (i = queues - 1; i >= 0; i--) {
378 NetClientState *nc = qemu_get_subqueue(nic, i);
379
380 qemu_cleanup_net_client(nc);
381 qemu_free_net_client(nc);
382 }
383
384 g_free(nic);
385 }
386
387 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque)
388 {
389 NetClientState *nc;
390
391 QTAILQ_FOREACH(nc, &net_clients, next) {
392 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
393 if (nc->queue_index == 0) {
394 func(qemu_get_nic(nc), opaque);
395 }
396 }
397 }
398 }
399
400 bool qemu_has_ufo(NetClientState *nc)
401 {
402 if (!nc || !nc->info->has_ufo) {
403 return false;
404 }
405
406 return nc->info->has_ufo(nc);
407 }
408
409 bool qemu_has_vnet_hdr(NetClientState *nc)
410 {
411 if (!nc || !nc->info->has_vnet_hdr) {
412 return false;
413 }
414
415 return nc->info->has_vnet_hdr(nc);
416 }
417
418 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len)
419 {
420 if (!nc || !nc->info->has_vnet_hdr_len) {
421 return false;
422 }
423
424 return nc->info->has_vnet_hdr_len(nc, len);
425 }
426
427 void qemu_using_vnet_hdr(NetClientState *nc, bool enable)
428 {
429 if (!nc || !nc->info->using_vnet_hdr) {
430 return;
431 }
432
433 nc->info->using_vnet_hdr(nc, enable);
434 }
435
436 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6,
437 int ecn, int ufo)
438 {
439 if (!nc || !nc->info->set_offload) {
440 return;
441 }
442
443 nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo);
444 }
445
446 void qemu_set_vnet_hdr_len(NetClientState *nc, int len)
447 {
448 if (!nc || !nc->info->set_vnet_hdr_len) {
449 return;
450 }
451
452 nc->info->set_vnet_hdr_len(nc, len);
453 }
454
455 int qemu_can_send_packet(NetClientState *sender)
456 {
457 int vm_running = runstate_is_running();
458
459 if (!vm_running) {
460 return 0;
461 }
462
463 if (!sender->peer) {
464 return 1;
465 }
466
467 if (sender->peer->receive_disabled) {
468 return 0;
469 } else if (sender->peer->info->can_receive &&
470 !sender->peer->info->can_receive(sender->peer)) {
471 return 0;
472 }
473 return 1;
474 }
475
476 ssize_t qemu_deliver_packet(NetClientState *sender,
477 unsigned flags,
478 const uint8_t *data,
479 size_t size,
480 void *opaque)
481 {
482 NetClientState *nc = opaque;
483 ssize_t ret;
484
485 if (nc->link_down) {
486 return size;
487 }
488
489 if (nc->receive_disabled) {
490 return 0;
491 }
492
493 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) {
494 ret = nc->info->receive_raw(nc, data, size);
495 } else {
496 ret = nc->info->receive(nc, data, size);
497 }
498
499 if (ret == 0) {
500 nc->receive_disabled = 1;
501 }
502
503 return ret;
504 }
505
506 void qemu_purge_queued_packets(NetClientState *nc)
507 {
508 if (!nc->peer) {
509 return;
510 }
511
512 qemu_net_queue_purge(nc->peer->incoming_queue, nc);
513 }
514
515 static
516 void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge)
517 {
518 nc->receive_disabled = 0;
519
520 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) {
521 if (net_hub_flush(nc->peer)) {
522 qemu_notify_event();
523 }
524 }
525 if (qemu_net_queue_flush(nc->incoming_queue)) {
526 /* We emptied the queue successfully, signal to the IO thread to repoll
527 * the file descriptor (for tap, for example).
528 */
529 qemu_notify_event();
530 } else if (purge) {
531 /* Unable to empty the queue, purge remaining packets */
532 qemu_net_queue_purge(nc->incoming_queue, nc);
533 }
534 }
535
536 void qemu_flush_queued_packets(NetClientState *nc)
537 {
538 qemu_flush_or_purge_queued_packets(nc, false);
539 }
540
541 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender,
542 unsigned flags,
543 const uint8_t *buf, int size,
544 NetPacketSent *sent_cb)
545 {
546 NetQueue *queue;
547
548 #ifdef DEBUG_NET
549 printf("qemu_send_packet_async:\n");
550 hex_dump(stdout, buf, size);
551 #endif
552
553 if (sender->link_down || !sender->peer) {
554 return size;
555 }
556
557 queue = sender->peer->incoming_queue;
558
559 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb);
560 }
561
562 ssize_t qemu_send_packet_async(NetClientState *sender,
563 const uint8_t *buf, int size,
564 NetPacketSent *sent_cb)
565 {
566 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE,
567 buf, size, sent_cb);
568 }
569
570 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size)
571 {
572 qemu_send_packet_async(nc, buf, size, NULL);
573 }
574
575 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size)
576 {
577 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW,
578 buf, size, NULL);
579 }
580
581 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov,
582 int iovcnt)
583 {
584 uint8_t buffer[NET_BUFSIZE];
585 size_t offset;
586
587 offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer));
588
589 return nc->info->receive(nc, buffer, offset);
590 }
591
592 ssize_t qemu_deliver_packet_iov(NetClientState *sender,
593 unsigned flags,
594 const struct iovec *iov,
595 int iovcnt,
596 void *opaque)
597 {
598 NetClientState *nc = opaque;
599 int ret;
600
601 if (nc->link_down) {
602 return iov_size(iov, iovcnt);
603 }
604
605 if (nc->receive_disabled) {
606 return 0;
607 }
608
609 if (nc->info->receive_iov) {
610 ret = nc->info->receive_iov(nc, iov, iovcnt);
611 } else {
612 ret = nc_sendv_compat(nc, iov, iovcnt);
613 }
614
615 if (ret == 0) {
616 nc->receive_disabled = 1;
617 }
618
619 return ret;
620 }
621
622 ssize_t qemu_sendv_packet_async(NetClientState *sender,
623 const struct iovec *iov, int iovcnt,
624 NetPacketSent *sent_cb)
625 {
626 NetQueue *queue;
627
628 if (sender->link_down || !sender->peer) {
629 return iov_size(iov, iovcnt);
630 }
631
632 queue = sender->peer->incoming_queue;
633
634 return qemu_net_queue_send_iov(queue, sender,
635 QEMU_NET_PACKET_FLAG_NONE,
636 iov, iovcnt, sent_cb);
637 }
638
639 ssize_t
640 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt)
641 {
642 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL);
643 }
644
645 NetClientState *qemu_find_netdev(const char *id)
646 {
647 NetClientState *nc;
648
649 QTAILQ_FOREACH(nc, &net_clients, next) {
650 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC)
651 continue;
652 if (!strcmp(nc->name, id)) {
653 return nc;
654 }
655 }
656
657 return NULL;
658 }
659
660 int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
661 NetClientOptionsKind type, int max)
662 {
663 NetClientState *nc;
664 int ret = 0;
665
666 QTAILQ_FOREACH(nc, &net_clients, next) {
667 if (nc->info->type == type) {
668 continue;
669 }
670 if (!id || !strcmp(nc->name, id)) {
671 if (ret < max) {
672 ncs[ret] = nc;
673 }
674 ret++;
675 }
676 }
677
678 return ret;
679 }
680
681 static int nic_get_free_idx(void)
682 {
683 int index;
684
685 for (index = 0; index < MAX_NICS; index++)
686 if (!nd_table[index].used)
687 return index;
688 return -1;
689 }
690
691 int qemu_show_nic_models(const char *arg, const char *const *models)
692 {
693 int i;
694
695 if (!arg || !is_help_option(arg)) {
696 return 0;
697 }
698
699 fprintf(stderr, "qemu: Supported NIC models: ");
700 for (i = 0 ; models[i]; i++)
701 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
702 return 1;
703 }
704
705 void qemu_check_nic_model(NICInfo *nd, const char *model)
706 {
707 const char *models[2];
708
709 models[0] = model;
710 models[1] = NULL;
711
712 if (qemu_show_nic_models(nd->model, models))
713 exit(0);
714 if (qemu_find_nic_model(nd, models, model) < 0)
715 exit(1);
716 }
717
718 int qemu_find_nic_model(NICInfo *nd, const char * const *models,
719 const char *default_model)
720 {
721 int i;
722
723 if (!nd->model)
724 nd->model = g_strdup(default_model);
725
726 for (i = 0 ; models[i]; i++) {
727 if (strcmp(nd->model, models[i]) == 0)
728 return i;
729 }
730
731 error_report("Unsupported NIC model: %s", nd->model);
732 return -1;
733 }
734
735 static int net_init_nic(const NetClientOptions *opts, const char *name,
736 NetClientState *peer)
737 {
738 int idx;
739 NICInfo *nd;
740 const NetLegacyNicOptions *nic;
741
742 assert(opts->kind == NET_CLIENT_OPTIONS_KIND_NIC);
743 nic = opts->nic;
744
745 idx = nic_get_free_idx();
746 if (idx == -1 || nb_nics >= MAX_NICS) {
747 error_report("Too Many NICs");
748 return -1;
749 }
750
751 nd = &nd_table[idx];
752
753 memset(nd, 0, sizeof(*nd));
754
755 if (nic->has_netdev) {
756 nd->netdev = qemu_find_netdev(nic->netdev);
757 if (!nd->netdev) {
758 error_report("netdev '%s' not found", nic->netdev);
759 return -1;
760 }
761 } else {
762 assert(peer);
763 nd->netdev = peer;
764 }
765 nd->name = g_strdup(name);
766 if (nic->has_model) {
767 nd->model = g_strdup(nic->model);
768 }
769 if (nic->has_addr) {
770 nd->devaddr = g_strdup(nic->addr);
771 }
772
773 if (nic->has_macaddr &&
774 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) {
775 error_report("invalid syntax for ethernet address");
776 return -1;
777 }
778 if (nic->has_macaddr &&
779 is_multicast_ether_addr(nd->macaddr.a)) {
780 error_report("NIC cannot have multicast MAC address (odd 1st byte)");
781 return -1;
782 }
783 qemu_macaddr_default_if_unset(&nd->macaddr);
784
785 if (nic->has_vectors) {
786 if (nic->vectors > 0x7ffffff) {
787 error_report("invalid # of vectors: %"PRIu32, nic->vectors);
788 return -1;
789 }
790 nd->nvectors = nic->vectors;
791 } else {
792 nd->nvectors = DEV_NVECTORS_UNSPECIFIED;
793 }
794
795 nd->used = 1;
796 nb_nics++;
797
798 return idx;
799 }
800
801
802 static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])(
803 const NetClientOptions *opts,
804 const char *name,
805 NetClientState *peer) = {
806 [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic,
807 #ifdef CONFIG_SLIRP
808 [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp,
809 #endif
810 [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap,
811 [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket,
812 #ifdef CONFIG_VDE
813 [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde,
814 #endif
815 #ifdef CONFIG_NETMAP
816 [NET_CLIENT_OPTIONS_KIND_NETMAP] = net_init_netmap,
817 #endif
818 [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump,
819 #ifdef CONFIG_NET_BRIDGE
820 [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge,
821 #endif
822 [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport,
823 #ifdef CONFIG_VHOST_NET_USED
824 [NET_CLIENT_OPTIONS_KIND_VHOST_USER] = net_init_vhost_user,
825 #endif
826 #ifdef CONFIG_L2TPV3
827 [NET_CLIENT_OPTIONS_KIND_L2TPV3] = net_init_l2tpv3,
828 #endif
829 };
830
831
832 static int net_client_init1(const void *object, int is_netdev, Error **errp)
833 {
834 union {
835 const Netdev *netdev;
836 const NetLegacy *net;
837 } u;
838 const NetClientOptions *opts;
839 const char *name;
840
841 if (is_netdev) {
842 u.netdev = object;
843 opts = u.netdev->opts;
844 name = u.netdev->id;
845
846 switch (opts->kind) {
847 #ifdef CONFIG_SLIRP
848 case NET_CLIENT_OPTIONS_KIND_USER:
849 #endif
850 case NET_CLIENT_OPTIONS_KIND_TAP:
851 case NET_CLIENT_OPTIONS_KIND_SOCKET:
852 #ifdef CONFIG_VDE
853 case NET_CLIENT_OPTIONS_KIND_VDE:
854 #endif
855 #ifdef CONFIG_NETMAP
856 case NET_CLIENT_OPTIONS_KIND_NETMAP:
857 #endif
858 #ifdef CONFIG_NET_BRIDGE
859 case NET_CLIENT_OPTIONS_KIND_BRIDGE:
860 #endif
861 case NET_CLIENT_OPTIONS_KIND_HUBPORT:
862 #ifdef CONFIG_VHOST_NET_USED
863 case NET_CLIENT_OPTIONS_KIND_VHOST_USER:
864 #endif
865 #ifdef CONFIG_L2TPV3
866 case NET_CLIENT_OPTIONS_KIND_L2TPV3:
867 #endif
868 break;
869
870 default:
871 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type",
872 "a netdev backend type");
873 return -1;
874 }
875 } else {
876 u.net = object;
877 opts = u.net->opts;
878 /* missing optional values have been initialized to "all bits zero" */
879 name = u.net->has_id ? u.net->id : u.net->name;
880 }
881
882 if (net_client_init_fun[opts->kind]) {
883 NetClientState *peer = NULL;
884
885 /* Do not add to a vlan if it's a -netdev or a nic with a netdev=
886 * parameter. */
887 if (!is_netdev &&
888 (opts->kind != NET_CLIENT_OPTIONS_KIND_NIC ||
889 !opts->nic->has_netdev)) {
890 peer = net_hub_add_port(u.net->has_vlan ? u.net->vlan : 0, NULL);
891 }
892
893 if (net_client_init_fun[opts->kind](opts, name, peer) < 0) {
894 /* TODO push error reporting into init() methods */
895 error_set(errp, QERR_DEVICE_INIT_FAILED,
896 NetClientOptionsKind_lookup[opts->kind]);
897 return -1;
898 }
899 }
900 return 0;
901 }
902
903
904 static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp)
905 {
906 if (is_netdev) {
907 visit_type_Netdev(v, (Netdev **)object, NULL, errp);
908 } else {
909 visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp);
910 }
911 }
912
913
914 int net_client_init(QemuOpts *opts, int is_netdev, Error **errp)
915 {
916 void *object = NULL;
917 Error *err = NULL;
918 int ret = -1;
919
920 {
921 OptsVisitor *ov = opts_visitor_new(opts);
922
923 net_visit(opts_get_visitor(ov), is_netdev, &object, &err);
924 opts_visitor_cleanup(ov);
925 }
926
927 if (!err) {
928 ret = net_client_init1(object, is_netdev, &err);
929 }
930
931 if (object) {
932 QapiDeallocVisitor *dv = qapi_dealloc_visitor_new();
933
934 net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL);
935 qapi_dealloc_visitor_cleanup(dv);
936 }
937
938 error_propagate(errp, err);
939 return ret;
940 }
941
942
943 static int net_host_check_device(const char *device)
944 {
945 int i;
946 for (i = 0; host_net_devices[i]; i++) {
947 if (!strncmp(host_net_devices[i], device,
948 strlen(host_net_devices[i]))) {
949 return 1;
950 }
951 }
952
953 return 0;
954 }
955
956 void net_host_device_add(Monitor *mon, const QDict *qdict)
957 {
958 const char *device = qdict_get_str(qdict, "device");
959 const char *opts_str = qdict_get_try_str(qdict, "opts");
960 Error *local_err = NULL;
961 QemuOpts *opts;
962
963 if (!net_host_check_device(device)) {
964 monitor_printf(mon, "invalid host network device %s\n", device);
965 return;
966 }
967
968 opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0);
969 if (!opts) {
970 return;
971 }
972
973 qemu_opt_set(opts, "type", device);
974
975 net_client_init(opts, 0, &local_err);
976 if (local_err) {
977 qerror_report_err(local_err);
978 error_free(local_err);
979 monitor_printf(mon, "adding host network device %s failed\n", device);
980 }
981 }
982
983 void net_host_device_remove(Monitor *mon, const QDict *qdict)
984 {
985 NetClientState *nc;
986 int vlan_id = qdict_get_int(qdict, "vlan_id");
987 const char *device = qdict_get_str(qdict, "device");
988
989 nc = net_hub_find_client_by_name(vlan_id, device);
990 if (!nc) {
991 error_report("Host network device '%s' on hub '%d' not found",
992 device, vlan_id);
993 return;
994 }
995 if (!net_host_check_device(nc->model)) {
996 error_report("invalid host network device '%s'", device);
997 return;
998 }
999 qemu_del_net_client(nc);
1000 }
1001
1002 void netdev_add(QemuOpts *opts, Error **errp)
1003 {
1004 net_client_init(opts, 1, errp);
1005 }
1006
1007 int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret)
1008 {
1009 Error *local_err = NULL;
1010 QemuOptsList *opts_list;
1011 QemuOpts *opts;
1012
1013 opts_list = qemu_find_opts_err("netdev", &local_err);
1014 if (local_err) {
1015 goto exit_err;
1016 }
1017
1018 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err);
1019 if (local_err) {
1020 goto exit_err;
1021 }
1022
1023 netdev_add(opts, &local_err);
1024 if (local_err) {
1025 qemu_opts_del(opts);
1026 goto exit_err;
1027 }
1028
1029 return 0;
1030
1031 exit_err:
1032 qerror_report_err(local_err);
1033 error_free(local_err);
1034 return -1;
1035 }
1036
1037 void qmp_netdev_del(const char *id, Error **errp)
1038 {
1039 NetClientState *nc;
1040 QemuOpts *opts;
1041
1042 nc = qemu_find_netdev(id);
1043 if (!nc) {
1044 error_set(errp, QERR_DEVICE_NOT_FOUND, id);
1045 return;
1046 }
1047
1048 opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id);
1049 if (!opts) {
1050 error_setg(errp, "Device '%s' is not a netdev", id);
1051 return;
1052 }
1053
1054 qemu_del_net_client(nc);
1055 qemu_opts_del(opts);
1056 }
1057
1058 void print_net_client(Monitor *mon, NetClientState *nc)
1059 {
1060 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name,
1061 nc->queue_index,
1062 NetClientOptionsKind_lookup[nc->info->type],
1063 nc->info_str);
1064 }
1065
1066 RxFilterInfoList *qmp_query_rx_filter(bool has_name, const char *name,
1067 Error **errp)
1068 {
1069 NetClientState *nc;
1070 RxFilterInfoList *filter_list = NULL, *last_entry = NULL;
1071
1072 QTAILQ_FOREACH(nc, &net_clients, next) {
1073 RxFilterInfoList *entry;
1074 RxFilterInfo *info;
1075
1076 if (has_name && strcmp(nc->name, name) != 0) {
1077 continue;
1078 }
1079
1080 /* only query rx-filter information of NIC */
1081 if (nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC) {
1082 if (has_name) {
1083 error_setg(errp, "net client(%s) isn't a NIC", name);
1084 return NULL;
1085 }
1086 continue;
1087 }
1088
1089 if (nc->info->query_rx_filter) {
1090 info = nc->info->query_rx_filter(nc);
1091 entry = g_malloc0(sizeof(*entry));
1092 entry->value = info;
1093
1094 if (!filter_list) {
1095 filter_list = entry;
1096 } else {
1097 last_entry->next = entry;
1098 }
1099 last_entry = entry;
1100 } else if (has_name) {
1101 error_setg(errp, "net client(%s) doesn't support"
1102 " rx-filter querying", name);
1103 return NULL;
1104 }
1105
1106 if (has_name) {
1107 break;
1108 }
1109 }
1110
1111 if (filter_list == NULL && has_name) {
1112 error_setg(errp, "invalid net client name: %s", name);
1113 }
1114
1115 return filter_list;
1116 }
1117
1118 void do_info_network(Monitor *mon, const QDict *qdict)
1119 {
1120 NetClientState *nc, *peer;
1121 NetClientOptionsKind type;
1122
1123 net_hub_info(mon);
1124
1125 QTAILQ_FOREACH(nc, &net_clients, next) {
1126 peer = nc->peer;
1127 type = nc->info->type;
1128
1129 /* Skip if already printed in hub info */
1130 if (net_hub_id_for_client(nc, NULL) == 0) {
1131 continue;
1132 }
1133
1134 if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) {
1135 print_net_client(mon, nc);
1136 } /* else it's a netdev connected to a NIC, printed with the NIC */
1137 if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) {
1138 monitor_printf(mon, " \\ ");
1139 print_net_client(mon, peer);
1140 }
1141 }
1142 }
1143
1144 void qmp_set_link(const char *name, bool up, Error **errp)
1145 {
1146 NetClientState *ncs[MAX_QUEUE_NUM];
1147 NetClientState *nc;
1148 int queues, i;
1149
1150 queues = qemu_find_net_clients_except(name, ncs,
1151 NET_CLIENT_OPTIONS_KIND_MAX,
1152 MAX_QUEUE_NUM);
1153
1154 if (queues == 0) {
1155 error_set(errp, QERR_DEVICE_NOT_FOUND, name);
1156 return;
1157 }
1158 nc = ncs[0];
1159
1160 for (i = 0; i < queues; i++) {
1161 ncs[i]->link_down = !up;
1162 }
1163
1164 if (nc->info->link_status_changed) {
1165 nc->info->link_status_changed(nc);
1166 }
1167
1168 if (nc->peer) {
1169 /* Change peer link only if the peer is NIC and then notify peer.
1170 * If the peer is a HUBPORT or a backend, we do not change the
1171 * link status.
1172 *
1173 * This behavior is compatible with qemu vlans where there could be
1174 * multiple clients that can still communicate with each other in
1175 * disconnected mode. For now maintain this compatibility.
1176 */
1177 if (nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
1178 for (i = 0; i < queues; i++) {
1179 ncs[i]->peer->link_down = !up;
1180 }
1181 }
1182 if (nc->peer->info->link_status_changed) {
1183 nc->peer->info->link_status_changed(nc->peer);
1184 }
1185 }
1186 }
1187
1188 static void net_vm_change_state_handler(void *opaque, int running,
1189 RunState state)
1190 {
1191 /* Complete all queued packets, to guarantee we don't modify
1192 * state later when VM is not running.
1193 */
1194 if (!running) {
1195 NetClientState *nc;
1196 NetClientState *tmp;
1197
1198 QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) {
1199 qemu_flush_or_purge_queued_packets(nc, true);
1200 }
1201 }
1202 }
1203
1204 void net_cleanup(void)
1205 {
1206 NetClientState *nc;
1207
1208 /* We may del multiple entries during qemu_del_net_client(),
1209 * so QTAILQ_FOREACH_SAFE() is also not safe here.
1210 */
1211 while (!QTAILQ_EMPTY(&net_clients)) {
1212 nc = QTAILQ_FIRST(&net_clients);
1213 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
1214 qemu_del_nic(qemu_get_nic(nc));
1215 } else {
1216 qemu_del_net_client(nc);
1217 }
1218 }
1219
1220 qemu_del_vm_change_state_handler(net_change_state_entry);
1221 }
1222
1223 void net_check_clients(void)
1224 {
1225 NetClientState *nc;
1226 int i;
1227
1228 /* Don't warn about the default network setup that you get if
1229 * no command line -net or -netdev options are specified. There
1230 * are two cases that we would otherwise complain about:
1231 * (1) board doesn't support a NIC but the implicit "-net nic"
1232 * requested one
1233 * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic"
1234 * sets up a nic that isn't connected to anything.
1235 */
1236 if (default_net) {
1237 return;
1238 }
1239
1240 net_hub_check_clients();
1241
1242 QTAILQ_FOREACH(nc, &net_clients, next) {
1243 if (!nc->peer) {
1244 fprintf(stderr, "Warning: %s %s has no peer\n",
1245 nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ?
1246 "nic" : "netdev", nc->name);
1247 }
1248 }
1249
1250 /* Check that all NICs requested via -net nic actually got created.
1251 * NICs created via -device don't need to be checked here because
1252 * they are always instantiated.
1253 */
1254 for (i = 0; i < MAX_NICS; i++) {
1255 NICInfo *nd = &nd_table[i];
1256 if (nd->used && !nd->instantiated) {
1257 fprintf(stderr, "Warning: requested NIC (%s, model %s) "
1258 "was not created (not supported by this machine?)\n",
1259 nd->name ? nd->name : "anonymous",
1260 nd->model ? nd->model : "unspecified");
1261 }
1262 }
1263 }
1264
1265 static int net_init_client(QemuOpts *opts, void *dummy)
1266 {
1267 Error *local_err = NULL;
1268
1269 net_client_init(opts, 0, &local_err);
1270 if (local_err) {
1271 qerror_report_err(local_err);
1272 error_free(local_err);
1273 return -1;
1274 }
1275
1276 return 0;
1277 }
1278
1279 static int net_init_netdev(QemuOpts *opts, void *dummy)
1280 {
1281 Error *local_err = NULL;
1282 int ret;
1283
1284 ret = net_client_init(opts, 1, &local_err);
1285 if (local_err) {
1286 qerror_report_err(local_err);
1287 error_free(local_err);
1288 return -1;
1289 }
1290
1291 return ret;
1292 }
1293
1294 int net_init_clients(void)
1295 {
1296 QemuOptsList *net = qemu_find_opts("net");
1297
1298 if (default_net) {
1299 /* if no clients, we use a default config */
1300 qemu_opts_set(net, NULL, "type", "nic");
1301 #ifdef CONFIG_SLIRP
1302 qemu_opts_set(net, NULL, "type", "user");
1303 #endif
1304 }
1305
1306 net_change_state_entry =
1307 qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL);
1308
1309 QTAILQ_INIT(&net_clients);
1310
1311 if (qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL, 1) == -1)
1312 return -1;
1313
1314 if (qemu_opts_foreach(net, net_init_client, NULL, 1) == -1) {
1315 return -1;
1316 }
1317
1318 return 0;
1319 }
1320
1321 int net_client_parse(QemuOptsList *opts_list, const char *optarg)
1322 {
1323 #if defined(CONFIG_SLIRP)
1324 int ret;
1325 if (net_slirp_parse_legacy(opts_list, optarg, &ret)) {
1326 return ret;
1327 }
1328 #endif
1329
1330 if (!qemu_opts_parse(opts_list, optarg, 1)) {
1331 return -1;
1332 }
1333
1334 default_net = 0;
1335 return 0;
1336 }
1337
1338 /* From FreeBSD */
1339 /* XXX: optimize */
1340 unsigned compute_mcast_idx(const uint8_t *ep)
1341 {
1342 uint32_t crc;
1343 int carry, i, j;
1344 uint8_t b;
1345
1346 crc = 0xffffffff;
1347 for (i = 0; i < 6; i++) {
1348 b = *ep++;
1349 for (j = 0; j < 8; j++) {
1350 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
1351 crc <<= 1;
1352 b >>= 1;
1353 if (carry) {
1354 crc = ((crc ^ POLYNOMIAL) | carry);
1355 }
1356 }
1357 }
1358 return crc >> 26;
1359 }
1360
1361 QemuOptsList qemu_netdev_opts = {
1362 .name = "netdev",
1363 .implied_opt_name = "type",
1364 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
1365 .desc = {
1366 /*
1367 * no elements => accept any params
1368 * validation will happen later
1369 */
1370 { /* end of list */ }
1371 },
1372 };
1373
1374 QemuOptsList qemu_net_opts = {
1375 .name = "net",
1376 .implied_opt_name = "type",
1377 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
1378 .desc = {
1379 /*
1380 * no elements => accept any params
1381 * validation will happen later
1382 */
1383 { /* end of list */ }
1384 },
1385 };