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1 | /* | |
2 | * QEMU System Emulator | |
3 | * | |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
7 | * of this software and associated documentation files (the "Software"), to deal | |
8 | * in the Software without restriction, including without limitation the rights | |
9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
10 | * copies of the Software, and to permit persons to whom the Software is | |
11 | * furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice shall be included in | |
14 | * all copies or substantial portions of the Software. | |
15 | * | |
16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
22 | * THE SOFTWARE. | |
23 | */ | |
24 | #include "net.h" | |
25 | ||
26 | #include "config-host.h" | |
27 | ||
28 | #include "net/tap.h" | |
29 | #include "net/socket.h" | |
30 | #include "net/dump.h" | |
31 | #include "net/slirp.h" | |
32 | #include "net/vde.h" | |
33 | #include "net/util.h" | |
34 | #include "monitor.h" | |
35 | #include "qemu-common.h" | |
36 | #include "qemu_socket.h" | |
37 | #include "qmp-commands.h" | |
38 | #include "hw/qdev.h" | |
39 | #include "iov.h" | |
40 | ||
41 | /* Net bridge is currently not supported for W32. */ | |
42 | #if !defined(_WIN32) | |
43 | # define CONFIG_NET_BRIDGE | |
44 | #endif | |
45 | ||
46 | static QTAILQ_HEAD(, VLANState) vlans; | |
47 | static QTAILQ_HEAD(, VLANClientState) non_vlan_clients; | |
48 | ||
49 | int default_net = 1; | |
50 | ||
51 | /***********************************************************/ | |
52 | /* network device redirectors */ | |
53 | ||
54 | #if defined(DEBUG_NET) | |
55 | static void hex_dump(FILE *f, const uint8_t *buf, int size) | |
56 | { | |
57 | int len, i, j, c; | |
58 | ||
59 | for(i=0;i<size;i+=16) { | |
60 | len = size - i; | |
61 | if (len > 16) | |
62 | len = 16; | |
63 | fprintf(f, "%08x ", i); | |
64 | for(j=0;j<16;j++) { | |
65 | if (j < len) | |
66 | fprintf(f, " %02x", buf[i+j]); | |
67 | else | |
68 | fprintf(f, " "); | |
69 | } | |
70 | fprintf(f, " "); | |
71 | for(j=0;j<len;j++) { | |
72 | c = buf[i+j]; | |
73 | if (c < ' ' || c > '~') | |
74 | c = '.'; | |
75 | fprintf(f, "%c", c); | |
76 | } | |
77 | fprintf(f, "\n"); | |
78 | } | |
79 | } | |
80 | #endif | |
81 | ||
82 | static int get_str_sep(char *buf, int buf_size, const char **pp, int sep) | |
83 | { | |
84 | const char *p, *p1; | |
85 | int len; | |
86 | p = *pp; | |
87 | p1 = strchr(p, sep); | |
88 | if (!p1) | |
89 | return -1; | |
90 | len = p1 - p; | |
91 | p1++; | |
92 | if (buf_size > 0) { | |
93 | if (len > buf_size - 1) | |
94 | len = buf_size - 1; | |
95 | memcpy(buf, p, len); | |
96 | buf[len] = '\0'; | |
97 | } | |
98 | *pp = p1; | |
99 | return 0; | |
100 | } | |
101 | ||
102 | int parse_host_port(struct sockaddr_in *saddr, const char *str) | |
103 | { | |
104 | char buf[512]; | |
105 | struct hostent *he; | |
106 | const char *p, *r; | |
107 | int port; | |
108 | ||
109 | p = str; | |
110 | if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) | |
111 | return -1; | |
112 | saddr->sin_family = AF_INET; | |
113 | if (buf[0] == '\0') { | |
114 | saddr->sin_addr.s_addr = 0; | |
115 | } else { | |
116 | if (qemu_isdigit(buf[0])) { | |
117 | if (!inet_aton(buf, &saddr->sin_addr)) | |
118 | return -1; | |
119 | } else { | |
120 | if ((he = gethostbyname(buf)) == NULL) | |
121 | return - 1; | |
122 | saddr->sin_addr = *(struct in_addr *)he->h_addr; | |
123 | } | |
124 | } | |
125 | port = strtol(p, (char **)&r, 0); | |
126 | if (r == p) | |
127 | return -1; | |
128 | saddr->sin_port = htons(port); | |
129 | return 0; | |
130 | } | |
131 | ||
132 | void qemu_format_nic_info_str(VLANClientState *vc, uint8_t macaddr[6]) | |
133 | { | |
134 | snprintf(vc->info_str, sizeof(vc->info_str), | |
135 | "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x", | |
136 | vc->model, | |
137 | macaddr[0], macaddr[1], macaddr[2], | |
138 | macaddr[3], macaddr[4], macaddr[5]); | |
139 | } | |
140 | ||
141 | void qemu_macaddr_default_if_unset(MACAddr *macaddr) | |
142 | { | |
143 | static int index = 0; | |
144 | static const MACAddr zero = { .a = { 0,0,0,0,0,0 } }; | |
145 | ||
146 | if (memcmp(macaddr, &zero, sizeof(zero)) != 0) | |
147 | return; | |
148 | macaddr->a[0] = 0x52; | |
149 | macaddr->a[1] = 0x54; | |
150 | macaddr->a[2] = 0x00; | |
151 | macaddr->a[3] = 0x12; | |
152 | macaddr->a[4] = 0x34; | |
153 | macaddr->a[5] = 0x56 + index++; | |
154 | } | |
155 | ||
156 | static char *assign_name(VLANClientState *vc1, const char *model) | |
157 | { | |
158 | VLANState *vlan; | |
159 | VLANClientState *vc; | |
160 | char buf[256]; | |
161 | int id = 0; | |
162 | ||
163 | QTAILQ_FOREACH(vlan, &vlans, next) { | |
164 | QTAILQ_FOREACH(vc, &vlan->clients, next) { | |
165 | if (vc != vc1 && strcmp(vc->model, model) == 0) { | |
166 | id++; | |
167 | } | |
168 | } | |
169 | } | |
170 | ||
171 | QTAILQ_FOREACH(vc, &non_vlan_clients, next) { | |
172 | if (vc != vc1 && strcmp(vc->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 ssize_t qemu_deliver_packet(VLANClientState *sender, | |
183 | unsigned flags, | |
184 | const uint8_t *data, | |
185 | size_t size, | |
186 | void *opaque); | |
187 | static ssize_t qemu_deliver_packet_iov(VLANClientState *sender, | |
188 | unsigned flags, | |
189 | const struct iovec *iov, | |
190 | int iovcnt, | |
191 | void *opaque); | |
192 | ||
193 | VLANClientState *qemu_new_net_client(NetClientInfo *info, | |
194 | VLANState *vlan, | |
195 | VLANClientState *peer, | |
196 | const char *model, | |
197 | const char *name) | |
198 | { | |
199 | VLANClientState *vc; | |
200 | ||
201 | assert(info->size >= sizeof(VLANClientState)); | |
202 | ||
203 | vc = g_malloc0(info->size); | |
204 | ||
205 | vc->info = info; | |
206 | vc->model = g_strdup(model); | |
207 | if (name) { | |
208 | vc->name = g_strdup(name); | |
209 | } else { | |
210 | vc->name = assign_name(vc, model); | |
211 | } | |
212 | ||
213 | if (vlan) { | |
214 | assert(!peer); | |
215 | vc->vlan = vlan; | |
216 | QTAILQ_INSERT_TAIL(&vc->vlan->clients, vc, next); | |
217 | } else { | |
218 | if (peer) { | |
219 | assert(!peer->peer); | |
220 | vc->peer = peer; | |
221 | peer->peer = vc; | |
222 | } | |
223 | QTAILQ_INSERT_TAIL(&non_vlan_clients, vc, next); | |
224 | ||
225 | vc->send_queue = qemu_new_net_queue(qemu_deliver_packet, | |
226 | qemu_deliver_packet_iov, | |
227 | vc); | |
228 | } | |
229 | ||
230 | return vc; | |
231 | } | |
232 | ||
233 | NICState *qemu_new_nic(NetClientInfo *info, | |
234 | NICConf *conf, | |
235 | const char *model, | |
236 | const char *name, | |
237 | void *opaque) | |
238 | { | |
239 | VLANClientState *nc; | |
240 | NICState *nic; | |
241 | ||
242 | assert(info->type == NET_CLIENT_TYPE_NIC); | |
243 | assert(info->size >= sizeof(NICState)); | |
244 | ||
245 | nc = qemu_new_net_client(info, conf->vlan, conf->peer, model, name); | |
246 | ||
247 | nic = DO_UPCAST(NICState, nc, nc); | |
248 | nic->conf = conf; | |
249 | nic->opaque = opaque; | |
250 | ||
251 | return nic; | |
252 | } | |
253 | ||
254 | static void qemu_cleanup_vlan_client(VLANClientState *vc) | |
255 | { | |
256 | if (vc->vlan) { | |
257 | QTAILQ_REMOVE(&vc->vlan->clients, vc, next); | |
258 | } else { | |
259 | QTAILQ_REMOVE(&non_vlan_clients, vc, next); | |
260 | } | |
261 | ||
262 | if (vc->info->cleanup) { | |
263 | vc->info->cleanup(vc); | |
264 | } | |
265 | } | |
266 | ||
267 | static void qemu_free_vlan_client(VLANClientState *vc) | |
268 | { | |
269 | if (!vc->vlan) { | |
270 | if (vc->send_queue) { | |
271 | qemu_del_net_queue(vc->send_queue); | |
272 | } | |
273 | if (vc->peer) { | |
274 | vc->peer->peer = NULL; | |
275 | } | |
276 | } | |
277 | g_free(vc->name); | |
278 | g_free(vc->model); | |
279 | g_free(vc); | |
280 | } | |
281 | ||
282 | void qemu_del_vlan_client(VLANClientState *vc) | |
283 | { | |
284 | /* If there is a peer NIC, delete and cleanup client, but do not free. */ | |
285 | if (!vc->vlan && vc->peer && vc->peer->info->type == NET_CLIENT_TYPE_NIC) { | |
286 | NICState *nic = DO_UPCAST(NICState, nc, vc->peer); | |
287 | if (nic->peer_deleted) { | |
288 | return; | |
289 | } | |
290 | nic->peer_deleted = true; | |
291 | /* Let NIC know peer is gone. */ | |
292 | vc->peer->link_down = true; | |
293 | if (vc->peer->info->link_status_changed) { | |
294 | vc->peer->info->link_status_changed(vc->peer); | |
295 | } | |
296 | qemu_cleanup_vlan_client(vc); | |
297 | return; | |
298 | } | |
299 | ||
300 | /* If this is a peer NIC and peer has already been deleted, free it now. */ | |
301 | if (!vc->vlan && vc->peer && vc->info->type == NET_CLIENT_TYPE_NIC) { | |
302 | NICState *nic = DO_UPCAST(NICState, nc, vc); | |
303 | if (nic->peer_deleted) { | |
304 | qemu_free_vlan_client(vc->peer); | |
305 | } | |
306 | } | |
307 | ||
308 | qemu_cleanup_vlan_client(vc); | |
309 | qemu_free_vlan_client(vc); | |
310 | } | |
311 | ||
312 | VLANClientState * | |
313 | qemu_find_vlan_client_by_name(Monitor *mon, int vlan_id, | |
314 | const char *client_str) | |
315 | { | |
316 | VLANState *vlan; | |
317 | VLANClientState *vc; | |
318 | ||
319 | vlan = qemu_find_vlan(vlan_id, 0); | |
320 | if (!vlan) { | |
321 | monitor_printf(mon, "unknown VLAN %d\n", vlan_id); | |
322 | return NULL; | |
323 | } | |
324 | ||
325 | QTAILQ_FOREACH(vc, &vlan->clients, next) { | |
326 | if (!strcmp(vc->name, client_str)) { | |
327 | break; | |
328 | } | |
329 | } | |
330 | if (!vc) { | |
331 | monitor_printf(mon, "can't find device %s on VLAN %d\n", | |
332 | client_str, vlan_id); | |
333 | } | |
334 | ||
335 | return vc; | |
336 | } | |
337 | ||
338 | void qemu_foreach_nic(qemu_nic_foreach func, void *opaque) | |
339 | { | |
340 | VLANClientState *nc; | |
341 | VLANState *vlan; | |
342 | ||
343 | QTAILQ_FOREACH(nc, &non_vlan_clients, next) { | |
344 | if (nc->info->type == NET_CLIENT_TYPE_NIC) { | |
345 | func(DO_UPCAST(NICState, nc, nc), opaque); | |
346 | } | |
347 | } | |
348 | ||
349 | QTAILQ_FOREACH(vlan, &vlans, next) { | |
350 | QTAILQ_FOREACH(nc, &vlan->clients, next) { | |
351 | if (nc->info->type == NET_CLIENT_TYPE_NIC) { | |
352 | func(DO_UPCAST(NICState, nc, nc), opaque); | |
353 | } | |
354 | } | |
355 | } | |
356 | } | |
357 | ||
358 | int qemu_can_send_packet(VLANClientState *sender) | |
359 | { | |
360 | VLANState *vlan = sender->vlan; | |
361 | VLANClientState *vc; | |
362 | ||
363 | if (sender->peer) { | |
364 | if (sender->peer->receive_disabled) { | |
365 | return 0; | |
366 | } else if (sender->peer->info->can_receive && | |
367 | !sender->peer->info->can_receive(sender->peer)) { | |
368 | return 0; | |
369 | } else { | |
370 | return 1; | |
371 | } | |
372 | } | |
373 | ||
374 | if (!sender->vlan) { | |
375 | return 1; | |
376 | } | |
377 | ||
378 | QTAILQ_FOREACH(vc, &vlan->clients, next) { | |
379 | if (vc == sender) { | |
380 | continue; | |
381 | } | |
382 | ||
383 | /* no can_receive() handler, they can always receive */ | |
384 | if (vc->info->can_receive && !vc->info->can_receive(vc)) { | |
385 | return 0; | |
386 | } | |
387 | } | |
388 | return 1; | |
389 | } | |
390 | ||
391 | static ssize_t qemu_deliver_packet(VLANClientState *sender, | |
392 | unsigned flags, | |
393 | const uint8_t *data, | |
394 | size_t size, | |
395 | void *opaque) | |
396 | { | |
397 | VLANClientState *vc = opaque; | |
398 | ssize_t ret; | |
399 | ||
400 | if (vc->link_down) { | |
401 | return size; | |
402 | } | |
403 | ||
404 | if (vc->receive_disabled) { | |
405 | return 0; | |
406 | } | |
407 | ||
408 | if (flags & QEMU_NET_PACKET_FLAG_RAW && vc->info->receive_raw) { | |
409 | ret = vc->info->receive_raw(vc, data, size); | |
410 | } else { | |
411 | ret = vc->info->receive(vc, data, size); | |
412 | } | |
413 | ||
414 | if (ret == 0) { | |
415 | vc->receive_disabled = 1; | |
416 | }; | |
417 | ||
418 | return ret; | |
419 | } | |
420 | ||
421 | static ssize_t qemu_vlan_deliver_packet(VLANClientState *sender, | |
422 | unsigned flags, | |
423 | const uint8_t *buf, | |
424 | size_t size, | |
425 | void *opaque) | |
426 | { | |
427 | VLANState *vlan = opaque; | |
428 | VLANClientState *vc; | |
429 | ssize_t ret = -1; | |
430 | ||
431 | QTAILQ_FOREACH(vc, &vlan->clients, next) { | |
432 | ssize_t len; | |
433 | ||
434 | if (vc == sender) { | |
435 | continue; | |
436 | } | |
437 | ||
438 | if (vc->link_down) { | |
439 | ret = size; | |
440 | continue; | |
441 | } | |
442 | ||
443 | if (vc->receive_disabled) { | |
444 | ret = 0; | |
445 | continue; | |
446 | } | |
447 | ||
448 | if (flags & QEMU_NET_PACKET_FLAG_RAW && vc->info->receive_raw) { | |
449 | len = vc->info->receive_raw(vc, buf, size); | |
450 | } else { | |
451 | len = vc->info->receive(vc, buf, size); | |
452 | } | |
453 | ||
454 | if (len == 0) { | |
455 | vc->receive_disabled = 1; | |
456 | } | |
457 | ||
458 | ret = (ret >= 0) ? ret : len; | |
459 | ||
460 | } | |
461 | ||
462 | return ret; | |
463 | } | |
464 | ||
465 | void qemu_purge_queued_packets(VLANClientState *vc) | |
466 | { | |
467 | NetQueue *queue; | |
468 | ||
469 | if (!vc->peer && !vc->vlan) { | |
470 | return; | |
471 | } | |
472 | ||
473 | if (vc->peer) { | |
474 | queue = vc->peer->send_queue; | |
475 | } else { | |
476 | queue = vc->vlan->send_queue; | |
477 | } | |
478 | ||
479 | qemu_net_queue_purge(queue, vc); | |
480 | } | |
481 | ||
482 | void qemu_flush_queued_packets(VLANClientState *vc) | |
483 | { | |
484 | NetQueue *queue; | |
485 | ||
486 | vc->receive_disabled = 0; | |
487 | ||
488 | if (vc->vlan) { | |
489 | queue = vc->vlan->send_queue; | |
490 | } else { | |
491 | queue = vc->send_queue; | |
492 | } | |
493 | ||
494 | qemu_net_queue_flush(queue); | |
495 | } | |
496 | ||
497 | static ssize_t qemu_send_packet_async_with_flags(VLANClientState *sender, | |
498 | unsigned flags, | |
499 | const uint8_t *buf, int size, | |
500 | NetPacketSent *sent_cb) | |
501 | { | |
502 | NetQueue *queue; | |
503 | ||
504 | #ifdef DEBUG_NET | |
505 | printf("qemu_send_packet_async:\n"); | |
506 | hex_dump(stdout, buf, size); | |
507 | #endif | |
508 | ||
509 | if (sender->link_down || (!sender->peer && !sender->vlan)) { | |
510 | return size; | |
511 | } | |
512 | ||
513 | if (sender->peer) { | |
514 | queue = sender->peer->send_queue; | |
515 | } else { | |
516 | queue = sender->vlan->send_queue; | |
517 | } | |
518 | ||
519 | return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb); | |
520 | } | |
521 | ||
522 | ssize_t qemu_send_packet_async(VLANClientState *sender, | |
523 | const uint8_t *buf, int size, | |
524 | NetPacketSent *sent_cb) | |
525 | { | |
526 | return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE, | |
527 | buf, size, sent_cb); | |
528 | } | |
529 | ||
530 | void qemu_send_packet(VLANClientState *vc, const uint8_t *buf, int size) | |
531 | { | |
532 | qemu_send_packet_async(vc, buf, size, NULL); | |
533 | } | |
534 | ||
535 | ssize_t qemu_send_packet_raw(VLANClientState *vc, const uint8_t *buf, int size) | |
536 | { | |
537 | return qemu_send_packet_async_with_flags(vc, QEMU_NET_PACKET_FLAG_RAW, | |
538 | buf, size, NULL); | |
539 | } | |
540 | ||
541 | static ssize_t vc_sendv_compat(VLANClientState *vc, const struct iovec *iov, | |
542 | int iovcnt) | |
543 | { | |
544 | uint8_t buffer[4096]; | |
545 | size_t offset; | |
546 | ||
547 | offset = iov_to_buf(iov, iovcnt, buffer, 0, sizeof(buffer)); | |
548 | ||
549 | return vc->info->receive(vc, buffer, offset); | |
550 | } | |
551 | ||
552 | static ssize_t qemu_deliver_packet_iov(VLANClientState *sender, | |
553 | unsigned flags, | |
554 | const struct iovec *iov, | |
555 | int iovcnt, | |
556 | void *opaque) | |
557 | { | |
558 | VLANClientState *vc = opaque; | |
559 | ||
560 | if (vc->link_down) { | |
561 | return iov_size(iov, iovcnt); | |
562 | } | |
563 | ||
564 | if (vc->info->receive_iov) { | |
565 | return vc->info->receive_iov(vc, iov, iovcnt); | |
566 | } else { | |
567 | return vc_sendv_compat(vc, iov, iovcnt); | |
568 | } | |
569 | } | |
570 | ||
571 | static ssize_t qemu_vlan_deliver_packet_iov(VLANClientState *sender, | |
572 | unsigned flags, | |
573 | const struct iovec *iov, | |
574 | int iovcnt, | |
575 | void *opaque) | |
576 | { | |
577 | VLANState *vlan = opaque; | |
578 | VLANClientState *vc; | |
579 | ssize_t ret = -1; | |
580 | ||
581 | QTAILQ_FOREACH(vc, &vlan->clients, next) { | |
582 | ssize_t len; | |
583 | ||
584 | if (vc == sender) { | |
585 | continue; | |
586 | } | |
587 | ||
588 | if (vc->link_down) { | |
589 | ret = iov_size(iov, iovcnt); | |
590 | continue; | |
591 | } | |
592 | ||
593 | assert(!(flags & QEMU_NET_PACKET_FLAG_RAW)); | |
594 | ||
595 | if (vc->info->receive_iov) { | |
596 | len = vc->info->receive_iov(vc, iov, iovcnt); | |
597 | } else { | |
598 | len = vc_sendv_compat(vc, iov, iovcnt); | |
599 | } | |
600 | ||
601 | ret = (ret >= 0) ? ret : len; | |
602 | } | |
603 | ||
604 | return ret; | |
605 | } | |
606 | ||
607 | ssize_t qemu_sendv_packet_async(VLANClientState *sender, | |
608 | const struct iovec *iov, int iovcnt, | |
609 | NetPacketSent *sent_cb) | |
610 | { | |
611 | NetQueue *queue; | |
612 | ||
613 | if (sender->link_down || (!sender->peer && !sender->vlan)) { | |
614 | return iov_size(iov, iovcnt); | |
615 | } | |
616 | ||
617 | if (sender->peer) { | |
618 | queue = sender->peer->send_queue; | |
619 | } else { | |
620 | queue = sender->vlan->send_queue; | |
621 | } | |
622 | ||
623 | return qemu_net_queue_send_iov(queue, sender, | |
624 | QEMU_NET_PACKET_FLAG_NONE, | |
625 | iov, iovcnt, sent_cb); | |
626 | } | |
627 | ||
628 | ssize_t | |
629 | qemu_sendv_packet(VLANClientState *vc, const struct iovec *iov, int iovcnt) | |
630 | { | |
631 | return qemu_sendv_packet_async(vc, iov, iovcnt, NULL); | |
632 | } | |
633 | ||
634 | /* find or alloc a new VLAN */ | |
635 | VLANState *qemu_find_vlan(int id, int allocate) | |
636 | { | |
637 | VLANState *vlan; | |
638 | ||
639 | QTAILQ_FOREACH(vlan, &vlans, next) { | |
640 | if (vlan->id == id) { | |
641 | return vlan; | |
642 | } | |
643 | } | |
644 | ||
645 | if (!allocate) { | |
646 | return NULL; | |
647 | } | |
648 | ||
649 | vlan = g_malloc0(sizeof(VLANState)); | |
650 | vlan->id = id; | |
651 | QTAILQ_INIT(&vlan->clients); | |
652 | ||
653 | vlan->send_queue = qemu_new_net_queue(qemu_vlan_deliver_packet, | |
654 | qemu_vlan_deliver_packet_iov, | |
655 | vlan); | |
656 | ||
657 | QTAILQ_INSERT_TAIL(&vlans, vlan, next); | |
658 | ||
659 | return vlan; | |
660 | } | |
661 | ||
662 | VLANClientState *qemu_find_netdev(const char *id) | |
663 | { | |
664 | VLANClientState *vc; | |
665 | ||
666 | QTAILQ_FOREACH(vc, &non_vlan_clients, next) { | |
667 | if (vc->info->type == NET_CLIENT_TYPE_NIC) | |
668 | continue; | |
669 | if (!strcmp(vc->name, id)) { | |
670 | return vc; | |
671 | } | |
672 | } | |
673 | ||
674 | return NULL; | |
675 | } | |
676 | ||
677 | static int nic_get_free_idx(void) | |
678 | { | |
679 | int index; | |
680 | ||
681 | for (index = 0; index < MAX_NICS; index++) | |
682 | if (!nd_table[index].used) | |
683 | return index; | |
684 | return -1; | |
685 | } | |
686 | ||
687 | int qemu_show_nic_models(const char *arg, const char *const *models) | |
688 | { | |
689 | int i; | |
690 | ||
691 | if (!arg || strcmp(arg, "?")) | |
692 | return 0; | |
693 | ||
694 | fprintf(stderr, "qemu: Supported NIC models: "); | |
695 | for (i = 0 ; models[i]; i++) | |
696 | fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n'); | |
697 | return 1; | |
698 | } | |
699 | ||
700 | void qemu_check_nic_model(NICInfo *nd, const char *model) | |
701 | { | |
702 | const char *models[2]; | |
703 | ||
704 | models[0] = model; | |
705 | models[1] = NULL; | |
706 | ||
707 | if (qemu_show_nic_models(nd->model, models)) | |
708 | exit(0); | |
709 | if (qemu_find_nic_model(nd, models, model) < 0) | |
710 | exit(1); | |
711 | } | |
712 | ||
713 | int qemu_find_nic_model(NICInfo *nd, const char * const *models, | |
714 | const char *default_model) | |
715 | { | |
716 | int i; | |
717 | ||
718 | if (!nd->model) | |
719 | nd->model = g_strdup(default_model); | |
720 | ||
721 | for (i = 0 ; models[i]; i++) { | |
722 | if (strcmp(nd->model, models[i]) == 0) | |
723 | return i; | |
724 | } | |
725 | ||
726 | error_report("Unsupported NIC model: %s", nd->model); | |
727 | return -1; | |
728 | } | |
729 | ||
730 | int net_handle_fd_param(Monitor *mon, const char *param) | |
731 | { | |
732 | int fd; | |
733 | ||
734 | if (!qemu_isdigit(param[0]) && mon) { | |
735 | ||
736 | fd = monitor_get_fd(mon, param); | |
737 | if (fd == -1) { | |
738 | error_report("No file descriptor named %s found", param); | |
739 | return -1; | |
740 | } | |
741 | } else { | |
742 | fd = qemu_parse_fd(param); | |
743 | } | |
744 | ||
745 | return fd; | |
746 | } | |
747 | ||
748 | static int net_init_nic(QemuOpts *opts, | |
749 | Monitor *mon, | |
750 | const char *name, | |
751 | VLANState *vlan) | |
752 | { | |
753 | int idx; | |
754 | NICInfo *nd; | |
755 | const char *netdev; | |
756 | ||
757 | idx = nic_get_free_idx(); | |
758 | if (idx == -1 || nb_nics >= MAX_NICS) { | |
759 | error_report("Too Many NICs"); | |
760 | return -1; | |
761 | } | |
762 | ||
763 | nd = &nd_table[idx]; | |
764 | ||
765 | memset(nd, 0, sizeof(*nd)); | |
766 | ||
767 | if ((netdev = qemu_opt_get(opts, "netdev"))) { | |
768 | nd->netdev = qemu_find_netdev(netdev); | |
769 | if (!nd->netdev) { | |
770 | error_report("netdev '%s' not found", netdev); | |
771 | return -1; | |
772 | } | |
773 | } else { | |
774 | assert(vlan); | |
775 | nd->vlan = vlan; | |
776 | } | |
777 | if (name) { | |
778 | nd->name = g_strdup(name); | |
779 | } | |
780 | if (qemu_opt_get(opts, "model")) { | |
781 | nd->model = g_strdup(qemu_opt_get(opts, "model")); | |
782 | } | |
783 | if (qemu_opt_get(opts, "addr")) { | |
784 | nd->devaddr = g_strdup(qemu_opt_get(opts, "addr")); | |
785 | } | |
786 | ||
787 | if (qemu_opt_get(opts, "macaddr") && | |
788 | net_parse_macaddr(nd->macaddr.a, qemu_opt_get(opts, "macaddr")) < 0) { | |
789 | error_report("invalid syntax for ethernet address"); | |
790 | return -1; | |
791 | } | |
792 | qemu_macaddr_default_if_unset(&nd->macaddr); | |
793 | ||
794 | nd->nvectors = qemu_opt_get_number(opts, "vectors", | |
795 | DEV_NVECTORS_UNSPECIFIED); | |
796 | if (nd->nvectors != DEV_NVECTORS_UNSPECIFIED && | |
797 | (nd->nvectors < 0 || nd->nvectors > 0x7ffffff)) { | |
798 | error_report("invalid # of vectors: %d", nd->nvectors); | |
799 | return -1; | |
800 | } | |
801 | ||
802 | nd->used = 1; | |
803 | nb_nics++; | |
804 | ||
805 | return idx; | |
806 | } | |
807 | ||
808 | #define NET_COMMON_PARAMS_DESC \ | |
809 | { \ | |
810 | .name = "type", \ | |
811 | .type = QEMU_OPT_STRING, \ | |
812 | .help = "net client type (nic, tap etc.)", \ | |
813 | }, { \ | |
814 | .name = "vlan", \ | |
815 | .type = QEMU_OPT_NUMBER, \ | |
816 | .help = "vlan number", \ | |
817 | }, { \ | |
818 | .name = "name", \ | |
819 | .type = QEMU_OPT_STRING, \ | |
820 | .help = "identifier for monitor commands", \ | |
821 | } | |
822 | ||
823 | typedef int (*net_client_init_func)(QemuOpts *opts, | |
824 | Monitor *mon, | |
825 | const char *name, | |
826 | VLANState *vlan); | |
827 | ||
828 | /* magic number, but compiler will warn if too small */ | |
829 | #define NET_MAX_DESC 20 | |
830 | ||
831 | static const struct { | |
832 | const char *type; | |
833 | net_client_init_func init; | |
834 | QemuOptDesc desc[NET_MAX_DESC]; | |
835 | } net_client_types[NET_CLIENT_TYPE_MAX] = { | |
836 | [NET_CLIENT_TYPE_NONE] = { | |
837 | .type = "none", | |
838 | .desc = { | |
839 | NET_COMMON_PARAMS_DESC, | |
840 | { /* end of list */ } | |
841 | }, | |
842 | }, | |
843 | [NET_CLIENT_TYPE_NIC] = { | |
844 | .type = "nic", | |
845 | .init = net_init_nic, | |
846 | .desc = { | |
847 | NET_COMMON_PARAMS_DESC, | |
848 | { | |
849 | .name = "netdev", | |
850 | .type = QEMU_OPT_STRING, | |
851 | .help = "id of -netdev to connect to", | |
852 | }, | |
853 | { | |
854 | .name = "macaddr", | |
855 | .type = QEMU_OPT_STRING, | |
856 | .help = "MAC address", | |
857 | }, { | |
858 | .name = "model", | |
859 | .type = QEMU_OPT_STRING, | |
860 | .help = "device model (e1000, rtl8139, virtio etc.)", | |
861 | }, { | |
862 | .name = "addr", | |
863 | .type = QEMU_OPT_STRING, | |
864 | .help = "PCI device address", | |
865 | }, { | |
866 | .name = "vectors", | |
867 | .type = QEMU_OPT_NUMBER, | |
868 | .help = "number of MSI-x vectors, 0 to disable MSI-X", | |
869 | }, | |
870 | { /* end of list */ } | |
871 | }, | |
872 | }, | |
873 | #ifdef CONFIG_SLIRP | |
874 | [NET_CLIENT_TYPE_USER] = { | |
875 | .type = "user", | |
876 | .init = net_init_slirp, | |
877 | .desc = { | |
878 | NET_COMMON_PARAMS_DESC, | |
879 | { | |
880 | .name = "hostname", | |
881 | .type = QEMU_OPT_STRING, | |
882 | .help = "client hostname reported by the builtin DHCP server", | |
883 | }, { | |
884 | .name = "restrict", | |
885 | .type = QEMU_OPT_STRING, | |
886 | .help = "isolate the guest from the host (y|yes|n|no)", | |
887 | }, { | |
888 | .name = "ip", | |
889 | .type = QEMU_OPT_STRING, | |
890 | .help = "legacy parameter, use net= instead", | |
891 | }, { | |
892 | .name = "net", | |
893 | .type = QEMU_OPT_STRING, | |
894 | .help = "IP address and optional netmask", | |
895 | }, { | |
896 | .name = "host", | |
897 | .type = QEMU_OPT_STRING, | |
898 | .help = "guest-visible address of the host", | |
899 | }, { | |
900 | .name = "tftp", | |
901 | .type = QEMU_OPT_STRING, | |
902 | .help = "root directory of the built-in TFTP server", | |
903 | }, { | |
904 | .name = "bootfile", | |
905 | .type = QEMU_OPT_STRING, | |
906 | .help = "BOOTP filename, for use with tftp=", | |
907 | }, { | |
908 | .name = "dhcpstart", | |
909 | .type = QEMU_OPT_STRING, | |
910 | .help = "the first of the 16 IPs the built-in DHCP server can assign", | |
911 | }, { | |
912 | .name = "dns", | |
913 | .type = QEMU_OPT_STRING, | |
914 | .help = "guest-visible address of the virtual nameserver", | |
915 | }, { | |
916 | .name = "smb", | |
917 | .type = QEMU_OPT_STRING, | |
918 | .help = "root directory of the built-in SMB server", | |
919 | }, { | |
920 | .name = "smbserver", | |
921 | .type = QEMU_OPT_STRING, | |
922 | .help = "IP address of the built-in SMB server", | |
923 | }, { | |
924 | .name = "hostfwd", | |
925 | .type = QEMU_OPT_STRING, | |
926 | .help = "guest port number to forward incoming TCP or UDP connections", | |
927 | }, { | |
928 | .name = "guestfwd", | |
929 | .type = QEMU_OPT_STRING, | |
930 | .help = "IP address and port to forward guest TCP connections", | |
931 | }, | |
932 | { /* end of list */ } | |
933 | }, | |
934 | }, | |
935 | #endif | |
936 | [NET_CLIENT_TYPE_TAP] = { | |
937 | .type = "tap", | |
938 | .init = net_init_tap, | |
939 | .desc = { | |
940 | NET_COMMON_PARAMS_DESC, | |
941 | { | |
942 | .name = "ifname", | |
943 | .type = QEMU_OPT_STRING, | |
944 | .help = "interface name", | |
945 | }, | |
946 | #ifndef _WIN32 | |
947 | { | |
948 | .name = "fd", | |
949 | .type = QEMU_OPT_STRING, | |
950 | .help = "file descriptor of an already opened tap", | |
951 | }, { | |
952 | .name = "script", | |
953 | .type = QEMU_OPT_STRING, | |
954 | .help = "script to initialize the interface", | |
955 | }, { | |
956 | .name = "downscript", | |
957 | .type = QEMU_OPT_STRING, | |
958 | .help = "script to shut down the interface", | |
959 | }, { | |
960 | #ifdef CONFIG_NET_BRIDGE | |
961 | .name = "helper", | |
962 | .type = QEMU_OPT_STRING, | |
963 | .help = "command to execute to configure bridge", | |
964 | }, { | |
965 | #endif | |
966 | .name = "sndbuf", | |
967 | .type = QEMU_OPT_SIZE, | |
968 | .help = "send buffer limit" | |
969 | }, { | |
970 | .name = "vnet_hdr", | |
971 | .type = QEMU_OPT_BOOL, | |
972 | .help = "enable the IFF_VNET_HDR flag on the tap interface" | |
973 | }, { | |
974 | .name = "vhost", | |
975 | .type = QEMU_OPT_BOOL, | |
976 | .help = "enable vhost-net network accelerator", | |
977 | }, { | |
978 | .name = "vhostfd", | |
979 | .type = QEMU_OPT_STRING, | |
980 | .help = "file descriptor of an already opened vhost net device", | |
981 | }, { | |
982 | .name = "vhostforce", | |
983 | .type = QEMU_OPT_BOOL, | |
984 | .help = "force vhost on for non-MSIX virtio guests", | |
985 | }, | |
986 | #endif /* _WIN32 */ | |
987 | { /* end of list */ } | |
988 | }, | |
989 | }, | |
990 | [NET_CLIENT_TYPE_SOCKET] = { | |
991 | .type = "socket", | |
992 | .init = net_init_socket, | |
993 | .desc = { | |
994 | NET_COMMON_PARAMS_DESC, | |
995 | { | |
996 | .name = "fd", | |
997 | .type = QEMU_OPT_STRING, | |
998 | .help = "file descriptor of an already opened socket", | |
999 | }, { | |
1000 | .name = "listen", | |
1001 | .type = QEMU_OPT_STRING, | |
1002 | .help = "port number, and optional hostname, to listen on", | |
1003 | }, { | |
1004 | .name = "connect", | |
1005 | .type = QEMU_OPT_STRING, | |
1006 | .help = "port number, and optional hostname, to connect to", | |
1007 | }, { | |
1008 | .name = "mcast", | |
1009 | .type = QEMU_OPT_STRING, | |
1010 | .help = "UDP multicast address and port number", | |
1011 | }, { | |
1012 | .name = "localaddr", | |
1013 | .type = QEMU_OPT_STRING, | |
1014 | .help = "source address and port for multicast and udp packets", | |
1015 | }, { | |
1016 | .name = "udp", | |
1017 | .type = QEMU_OPT_STRING, | |
1018 | .help = "UDP unicast address and port number", | |
1019 | }, | |
1020 | { /* end of list */ } | |
1021 | }, | |
1022 | }, | |
1023 | #ifdef CONFIG_VDE | |
1024 | [NET_CLIENT_TYPE_VDE] = { | |
1025 | .type = "vde", | |
1026 | .init = net_init_vde, | |
1027 | .desc = { | |
1028 | NET_COMMON_PARAMS_DESC, | |
1029 | { | |
1030 | .name = "sock", | |
1031 | .type = QEMU_OPT_STRING, | |
1032 | .help = "socket path", | |
1033 | }, { | |
1034 | .name = "port", | |
1035 | .type = QEMU_OPT_NUMBER, | |
1036 | .help = "port number", | |
1037 | }, { | |
1038 | .name = "group", | |
1039 | .type = QEMU_OPT_STRING, | |
1040 | .help = "group owner of socket", | |
1041 | }, { | |
1042 | .name = "mode", | |
1043 | .type = QEMU_OPT_NUMBER, | |
1044 | .help = "permissions for socket", | |
1045 | }, | |
1046 | { /* end of list */ } | |
1047 | }, | |
1048 | }, | |
1049 | #endif | |
1050 | [NET_CLIENT_TYPE_DUMP] = { | |
1051 | .type = "dump", | |
1052 | .init = net_init_dump, | |
1053 | .desc = { | |
1054 | NET_COMMON_PARAMS_DESC, | |
1055 | { | |
1056 | .name = "len", | |
1057 | .type = QEMU_OPT_SIZE, | |
1058 | .help = "per-packet size limit (64k default)", | |
1059 | }, { | |
1060 | .name = "file", | |
1061 | .type = QEMU_OPT_STRING, | |
1062 | .help = "dump file path (default is qemu-vlan0.pcap)", | |
1063 | }, | |
1064 | { /* end of list */ } | |
1065 | }, | |
1066 | }, | |
1067 | #ifdef CONFIG_NET_BRIDGE | |
1068 | [NET_CLIENT_TYPE_BRIDGE] = { | |
1069 | .type = "bridge", | |
1070 | .init = net_init_bridge, | |
1071 | .desc = { | |
1072 | NET_COMMON_PARAMS_DESC, | |
1073 | { | |
1074 | .name = "br", | |
1075 | .type = QEMU_OPT_STRING, | |
1076 | .help = "bridge name", | |
1077 | }, { | |
1078 | .name = "helper", | |
1079 | .type = QEMU_OPT_STRING, | |
1080 | .help = "command to execute to configure bridge", | |
1081 | }, | |
1082 | { /* end of list */ } | |
1083 | }, | |
1084 | }, | |
1085 | #endif /* CONFIG_NET_BRIDGE */ | |
1086 | }; | |
1087 | ||
1088 | int net_client_init(Monitor *mon, QemuOpts *opts, int is_netdev) | |
1089 | { | |
1090 | const char *name; | |
1091 | const char *type; | |
1092 | int i; | |
1093 | ||
1094 | type = qemu_opt_get(opts, "type"); | |
1095 | if (!type) { | |
1096 | qerror_report(QERR_MISSING_PARAMETER, "type"); | |
1097 | return -1; | |
1098 | } | |
1099 | ||
1100 | if (is_netdev) { | |
1101 | if (strcmp(type, "tap") != 0 && | |
1102 | #ifdef CONFIG_NET_BRIDGE | |
1103 | strcmp(type, "bridge") != 0 && | |
1104 | #endif | |
1105 | #ifdef CONFIG_SLIRP | |
1106 | strcmp(type, "user") != 0 && | |
1107 | #endif | |
1108 | #ifdef CONFIG_VDE | |
1109 | strcmp(type, "vde") != 0 && | |
1110 | #endif | |
1111 | strcmp(type, "socket") != 0) { | |
1112 | qerror_report(QERR_INVALID_PARAMETER_VALUE, "type", | |
1113 | "a netdev backend type"); | |
1114 | return -1; | |
1115 | } | |
1116 | ||
1117 | if (qemu_opt_get(opts, "vlan")) { | |
1118 | qerror_report(QERR_INVALID_PARAMETER, "vlan"); | |
1119 | return -1; | |
1120 | } | |
1121 | if (qemu_opt_get(opts, "name")) { | |
1122 | qerror_report(QERR_INVALID_PARAMETER, "name"); | |
1123 | return -1; | |
1124 | } | |
1125 | if (!qemu_opts_id(opts)) { | |
1126 | qerror_report(QERR_MISSING_PARAMETER, "id"); | |
1127 | return -1; | |
1128 | } | |
1129 | } | |
1130 | ||
1131 | name = qemu_opts_id(opts); | |
1132 | if (!name) { | |
1133 | name = qemu_opt_get(opts, "name"); | |
1134 | } | |
1135 | ||
1136 | for (i = 0; i < NET_CLIENT_TYPE_MAX; i++) { | |
1137 | if (net_client_types[i].type != NULL && | |
1138 | !strcmp(net_client_types[i].type, type)) { | |
1139 | VLANState *vlan = NULL; | |
1140 | int ret; | |
1141 | ||
1142 | if (qemu_opts_validate(opts, &net_client_types[i].desc[0]) == -1) { | |
1143 | return -1; | |
1144 | } | |
1145 | ||
1146 | /* Do not add to a vlan if it's a -netdev or a nic with a | |
1147 | * netdev= parameter. */ | |
1148 | if (!(is_netdev || | |
1149 | (strcmp(type, "nic") == 0 && qemu_opt_get(opts, "netdev")))) { | |
1150 | vlan = qemu_find_vlan(qemu_opt_get_number(opts, "vlan", 0), 1); | |
1151 | } | |
1152 | ||
1153 | ret = 0; | |
1154 | if (net_client_types[i].init) { | |
1155 | ret = net_client_types[i].init(opts, mon, name, vlan); | |
1156 | if (ret < 0) { | |
1157 | /* TODO push error reporting into init() methods */ | |
1158 | qerror_report(QERR_DEVICE_INIT_FAILED, type); | |
1159 | return -1; | |
1160 | } | |
1161 | } | |
1162 | return ret; | |
1163 | } | |
1164 | } | |
1165 | ||
1166 | qerror_report(QERR_INVALID_PARAMETER_VALUE, "type", | |
1167 | "a network client type"); | |
1168 | return -1; | |
1169 | } | |
1170 | ||
1171 | static int net_host_check_device(const char *device) | |
1172 | { | |
1173 | int i; | |
1174 | const char *valid_param_list[] = { "tap", "socket", "dump" | |
1175 | #ifdef CONFIG_NET_BRIDGE | |
1176 | , "bridge" | |
1177 | #endif | |
1178 | #ifdef CONFIG_SLIRP | |
1179 | ,"user" | |
1180 | #endif | |
1181 | #ifdef CONFIG_VDE | |
1182 | ,"vde" | |
1183 | #endif | |
1184 | }; | |
1185 | for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) { | |
1186 | if (!strncmp(valid_param_list[i], device, | |
1187 | strlen(valid_param_list[i]))) | |
1188 | return 1; | |
1189 | } | |
1190 | ||
1191 | return 0; | |
1192 | } | |
1193 | ||
1194 | void net_host_device_add(Monitor *mon, const QDict *qdict) | |
1195 | { | |
1196 | const char *device = qdict_get_str(qdict, "device"); | |
1197 | const char *opts_str = qdict_get_try_str(qdict, "opts"); | |
1198 | QemuOpts *opts; | |
1199 | ||
1200 | if (!net_host_check_device(device)) { | |
1201 | monitor_printf(mon, "invalid host network device %s\n", device); | |
1202 | return; | |
1203 | } | |
1204 | ||
1205 | opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0); | |
1206 | if (!opts) { | |
1207 | return; | |
1208 | } | |
1209 | ||
1210 | qemu_opt_set(opts, "type", device); | |
1211 | ||
1212 | if (net_client_init(mon, opts, 0) < 0) { | |
1213 | monitor_printf(mon, "adding host network device %s failed\n", device); | |
1214 | } | |
1215 | } | |
1216 | ||
1217 | void net_host_device_remove(Monitor *mon, const QDict *qdict) | |
1218 | { | |
1219 | VLANClientState *vc; | |
1220 | int vlan_id = qdict_get_int(qdict, "vlan_id"); | |
1221 | const char *device = qdict_get_str(qdict, "device"); | |
1222 | ||
1223 | vc = qemu_find_vlan_client_by_name(mon, vlan_id, device); | |
1224 | if (!vc) { | |
1225 | return; | |
1226 | } | |
1227 | if (!net_host_check_device(vc->model)) { | |
1228 | monitor_printf(mon, "invalid host network device %s\n", device); | |
1229 | return; | |
1230 | } | |
1231 | qemu_del_vlan_client(vc); | |
1232 | } | |
1233 | ||
1234 | int do_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret_data) | |
1235 | { | |
1236 | QemuOpts *opts; | |
1237 | int res; | |
1238 | ||
1239 | opts = qemu_opts_from_qdict(qemu_find_opts("netdev"), qdict); | |
1240 | if (!opts) { | |
1241 | return -1; | |
1242 | } | |
1243 | ||
1244 | res = net_client_init(mon, opts, 1); | |
1245 | if (res < 0) { | |
1246 | qemu_opts_del(opts); | |
1247 | } | |
1248 | ||
1249 | return res; | |
1250 | } | |
1251 | ||
1252 | int do_netdev_del(Monitor *mon, const QDict *qdict, QObject **ret_data) | |
1253 | { | |
1254 | const char *id = qdict_get_str(qdict, "id"); | |
1255 | VLANClientState *vc; | |
1256 | ||
1257 | vc = qemu_find_netdev(id); | |
1258 | if (!vc) { | |
1259 | qerror_report(QERR_DEVICE_NOT_FOUND, id); | |
1260 | return -1; | |
1261 | } | |
1262 | qemu_del_vlan_client(vc); | |
1263 | qemu_opts_del(qemu_opts_find(qemu_find_opts("netdev"), id)); | |
1264 | return 0; | |
1265 | } | |
1266 | ||
1267 | static void print_net_client(Monitor *mon, VLANClientState *vc) | |
1268 | { | |
1269 | monitor_printf(mon, "%s: type=%s,%s\n", vc->name, | |
1270 | net_client_types[vc->info->type].type, vc->info_str); | |
1271 | } | |
1272 | ||
1273 | void do_info_network(Monitor *mon) | |
1274 | { | |
1275 | VLANState *vlan; | |
1276 | VLANClientState *vc, *peer; | |
1277 | net_client_type type; | |
1278 | ||
1279 | QTAILQ_FOREACH(vlan, &vlans, next) { | |
1280 | monitor_printf(mon, "VLAN %d devices:\n", vlan->id); | |
1281 | ||
1282 | QTAILQ_FOREACH(vc, &vlan->clients, next) { | |
1283 | monitor_printf(mon, " "); | |
1284 | print_net_client(mon, vc); | |
1285 | } | |
1286 | } | |
1287 | monitor_printf(mon, "Devices not on any VLAN:\n"); | |
1288 | QTAILQ_FOREACH(vc, &non_vlan_clients, next) { | |
1289 | peer = vc->peer; | |
1290 | type = vc->info->type; | |
1291 | if (!peer || type == NET_CLIENT_TYPE_NIC) { | |
1292 | monitor_printf(mon, " "); | |
1293 | print_net_client(mon, vc); | |
1294 | } /* else it's a netdev connected to a NIC, printed with the NIC */ | |
1295 | if (peer && type == NET_CLIENT_TYPE_NIC) { | |
1296 | monitor_printf(mon, " \\ "); | |
1297 | print_net_client(mon, peer); | |
1298 | } | |
1299 | } | |
1300 | } | |
1301 | ||
1302 | void qmp_set_link(const char *name, bool up, Error **errp) | |
1303 | { | |
1304 | VLANState *vlan; | |
1305 | VLANClientState *vc = NULL; | |
1306 | ||
1307 | QTAILQ_FOREACH(vlan, &vlans, next) { | |
1308 | QTAILQ_FOREACH(vc, &vlan->clients, next) { | |
1309 | if (strcmp(vc->name, name) == 0) { | |
1310 | goto done; | |
1311 | } | |
1312 | } | |
1313 | } | |
1314 | QTAILQ_FOREACH(vc, &non_vlan_clients, next) { | |
1315 | if (!strcmp(vc->name, name)) { | |
1316 | goto done; | |
1317 | } | |
1318 | } | |
1319 | done: | |
1320 | ||
1321 | if (!vc) { | |
1322 | error_set(errp, QERR_DEVICE_NOT_FOUND, name); | |
1323 | return; | |
1324 | } | |
1325 | ||
1326 | vc->link_down = !up; | |
1327 | ||
1328 | if (vc->info->link_status_changed) { | |
1329 | vc->info->link_status_changed(vc); | |
1330 | } | |
1331 | ||
1332 | /* Notify peer. Don't update peer link status: this makes it possible to | |
1333 | * disconnect from host network without notifying the guest. | |
1334 | * FIXME: is disconnected link status change operation useful? | |
1335 | * | |
1336 | * Current behaviour is compatible with qemu vlans where there could be | |
1337 | * multiple clients that can still communicate with each other in | |
1338 | * disconnected mode. For now maintain this compatibility. */ | |
1339 | if (vc->peer && vc->peer->info->link_status_changed) { | |
1340 | vc->peer->info->link_status_changed(vc->peer); | |
1341 | } | |
1342 | } | |
1343 | ||
1344 | void net_cleanup(void) | |
1345 | { | |
1346 | VLANState *vlan; | |
1347 | VLANClientState *vc, *next_vc; | |
1348 | ||
1349 | QTAILQ_FOREACH(vlan, &vlans, next) { | |
1350 | QTAILQ_FOREACH_SAFE(vc, &vlan->clients, next, next_vc) { | |
1351 | qemu_del_vlan_client(vc); | |
1352 | } | |
1353 | } | |
1354 | ||
1355 | QTAILQ_FOREACH_SAFE(vc, &non_vlan_clients, next, next_vc) { | |
1356 | qemu_del_vlan_client(vc); | |
1357 | } | |
1358 | } | |
1359 | ||
1360 | void net_check_clients(void) | |
1361 | { | |
1362 | VLANState *vlan; | |
1363 | VLANClientState *vc; | |
1364 | int i; | |
1365 | ||
1366 | /* Don't warn about the default network setup that you get if | |
1367 | * no command line -net or -netdev options are specified. There | |
1368 | * are two cases that we would otherwise complain about: | |
1369 | * (1) board doesn't support a NIC but the implicit "-net nic" | |
1370 | * requested one | |
1371 | * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic" | |
1372 | * sets up a nic that isn't connected to anything. | |
1373 | */ | |
1374 | if (default_net) { | |
1375 | return; | |
1376 | } | |
1377 | ||
1378 | QTAILQ_FOREACH(vlan, &vlans, next) { | |
1379 | int has_nic = 0, has_host_dev = 0; | |
1380 | ||
1381 | QTAILQ_FOREACH(vc, &vlan->clients, next) { | |
1382 | switch (vc->info->type) { | |
1383 | case NET_CLIENT_TYPE_NIC: | |
1384 | has_nic = 1; | |
1385 | break; | |
1386 | case NET_CLIENT_TYPE_USER: | |
1387 | case NET_CLIENT_TYPE_TAP: | |
1388 | case NET_CLIENT_TYPE_SOCKET: | |
1389 | case NET_CLIENT_TYPE_VDE: | |
1390 | has_host_dev = 1; | |
1391 | break; | |
1392 | default: ; | |
1393 | } | |
1394 | } | |
1395 | if (has_host_dev && !has_nic) | |
1396 | fprintf(stderr, "Warning: vlan %d with no nics\n", vlan->id); | |
1397 | if (has_nic && !has_host_dev) | |
1398 | fprintf(stderr, | |
1399 | "Warning: vlan %d is not connected to host network\n", | |
1400 | vlan->id); | |
1401 | } | |
1402 | QTAILQ_FOREACH(vc, &non_vlan_clients, next) { | |
1403 | if (!vc->peer) { | |
1404 | fprintf(stderr, "Warning: %s %s has no peer\n", | |
1405 | vc->info->type == NET_CLIENT_TYPE_NIC ? "nic" : "netdev", | |
1406 | vc->name); | |
1407 | } | |
1408 | } | |
1409 | ||
1410 | /* Check that all NICs requested via -net nic actually got created. | |
1411 | * NICs created via -device don't need to be checked here because | |
1412 | * they are always instantiated. | |
1413 | */ | |
1414 | for (i = 0; i < MAX_NICS; i++) { | |
1415 | NICInfo *nd = &nd_table[i]; | |
1416 | if (nd->used && !nd->instantiated) { | |
1417 | fprintf(stderr, "Warning: requested NIC (%s, model %s) " | |
1418 | "was not created (not supported by this machine?)\n", | |
1419 | nd->name ? nd->name : "anonymous", | |
1420 | nd->model ? nd->model : "unspecified"); | |
1421 | } | |
1422 | } | |
1423 | } | |
1424 | ||
1425 | static int net_init_client(QemuOpts *opts, void *dummy) | |
1426 | { | |
1427 | if (net_client_init(NULL, opts, 0) < 0) | |
1428 | return -1; | |
1429 | return 0; | |
1430 | } | |
1431 | ||
1432 | static int net_init_netdev(QemuOpts *opts, void *dummy) | |
1433 | { | |
1434 | return net_client_init(NULL, opts, 1); | |
1435 | } | |
1436 | ||
1437 | int net_init_clients(void) | |
1438 | { | |
1439 | QemuOptsList *net = qemu_find_opts("net"); | |
1440 | ||
1441 | if (default_net) { | |
1442 | /* if no clients, we use a default config */ | |
1443 | qemu_opts_set(net, NULL, "type", "nic"); | |
1444 | #ifdef CONFIG_SLIRP | |
1445 | qemu_opts_set(net, NULL, "type", "user"); | |
1446 | #endif | |
1447 | } | |
1448 | ||
1449 | QTAILQ_INIT(&vlans); | |
1450 | QTAILQ_INIT(&non_vlan_clients); | |
1451 | ||
1452 | if (qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL, 1) == -1) | |
1453 | return -1; | |
1454 | ||
1455 | if (qemu_opts_foreach(net, net_init_client, NULL, 1) == -1) { | |
1456 | return -1; | |
1457 | } | |
1458 | ||
1459 | return 0; | |
1460 | } | |
1461 | ||
1462 | int net_client_parse(QemuOptsList *opts_list, const char *optarg) | |
1463 | { | |
1464 | #if defined(CONFIG_SLIRP) | |
1465 | int ret; | |
1466 | if (net_slirp_parse_legacy(opts_list, optarg, &ret)) { | |
1467 | return ret; | |
1468 | } | |
1469 | #endif | |
1470 | ||
1471 | if (!qemu_opts_parse(opts_list, optarg, 1)) { | |
1472 | return -1; | |
1473 | } | |
1474 | ||
1475 | default_net = 0; | |
1476 | return 0; | |
1477 | } | |
1478 | ||
1479 | /* From FreeBSD */ | |
1480 | /* XXX: optimize */ | |
1481 | unsigned compute_mcast_idx(const uint8_t *ep) | |
1482 | { | |
1483 | uint32_t crc; | |
1484 | int carry, i, j; | |
1485 | uint8_t b; | |
1486 | ||
1487 | crc = 0xffffffff; | |
1488 | for (i = 0; i < 6; i++) { | |
1489 | b = *ep++; | |
1490 | for (j = 0; j < 8; j++) { | |
1491 | carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01); | |
1492 | crc <<= 1; | |
1493 | b >>= 1; | |
1494 | if (carry) { | |
1495 | crc = ((crc ^ POLYNOMIAL) | carry); | |
1496 | } | |
1497 | } | |
1498 | } | |
1499 | return crc >> 26; | |
1500 | } |