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Commit | Line | Data |
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63a01ef8 AL |
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 | */ | |
d40cdb10 BS |
24 | #include "config-host.h" |
25 | ||
1422e32d | 26 | #include "net/net.h" |
fd9400b3 PB |
27 | #include "clients.h" |
28 | #include "hub.h" | |
1422e32d | 29 | #include "net/slirp.h" |
fd9400b3 | 30 | #include "util.h" |
a245fc18 | 31 | |
83c9089e | 32 | #include "monitor/monitor.h" |
1df49e04 | 33 | #include "qemu-common.h" |
1de7afc9 PB |
34 | #include "qemu/sockets.h" |
35 | #include "qemu/config-file.h" | |
4b37156c | 36 | #include "qmp-commands.h" |
75422b0d | 37 | #include "hw/qdev.h" |
1de7afc9 | 38 | #include "qemu/iov.h" |
6687b79d LE |
39 | #include "qapi-visit.h" |
40 | #include "qapi/opts-visitor.h" | |
7b1b5d19 | 41 | #include "qapi/dealloc-visitor.h" |
511d2b14 | 42 | |
2944e4ec SW |
43 | /* Net bridge is currently not supported for W32. */ |
44 | #if !defined(_WIN32) | |
45 | # define CONFIG_NET_BRIDGE | |
46 | #endif | |
47 | ||
4e68f7a0 | 48 | static QTAILQ_HEAD(, NetClientState) net_clients; |
63a01ef8 | 49 | |
cb4522cc GH |
50 | int default_net = 1; |
51 | ||
63a01ef8 AL |
52 | /***********************************************************/ |
53 | /* network device redirectors */ | |
54 | ||
68ac40d2 | 55 | #if defined(DEBUG_NET) |
63a01ef8 AL |
56 | static void hex_dump(FILE *f, const uint8_t *buf, int size) |
57 | { | |
58 | int len, i, j, c; | |
59 | ||
60 | for(i=0;i<size;i+=16) { | |
61 | len = size - i; | |
62 | if (len > 16) | |
63 | len = 16; | |
64 | fprintf(f, "%08x ", i); | |
65 | for(j=0;j<16;j++) { | |
66 | if (j < len) | |
67 | fprintf(f, " %02x", buf[i+j]); | |
68 | else | |
69 | fprintf(f, " "); | |
70 | } | |
71 | fprintf(f, " "); | |
72 | for(j=0;j<len;j++) { | |
73 | c = buf[i+j]; | |
74 | if (c < ' ' || c > '~') | |
75 | c = '.'; | |
76 | fprintf(f, "%c", c); | |
77 | } | |
78 | fprintf(f, "\n"); | |
79 | } | |
80 | } | |
81 | #endif | |
82 | ||
63a01ef8 AL |
83 | static int get_str_sep(char *buf, int buf_size, const char **pp, int sep) |
84 | { | |
85 | const char *p, *p1; | |
86 | int len; | |
87 | p = *pp; | |
88 | p1 = strchr(p, sep); | |
89 | if (!p1) | |
90 | return -1; | |
91 | len = p1 - p; | |
92 | p1++; | |
93 | if (buf_size > 0) { | |
94 | if (len > buf_size - 1) | |
95 | len = buf_size - 1; | |
96 | memcpy(buf, p, len); | |
97 | buf[len] = '\0'; | |
98 | } | |
99 | *pp = p1; | |
100 | return 0; | |
101 | } | |
102 | ||
63a01ef8 AL |
103 | int parse_host_port(struct sockaddr_in *saddr, const char *str) |
104 | { | |
105 | char buf[512]; | |
106 | struct hostent *he; | |
107 | const char *p, *r; | |
108 | int port; | |
109 | ||
110 | p = str; | |
111 | if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) | |
112 | return -1; | |
113 | saddr->sin_family = AF_INET; | |
114 | if (buf[0] == '\0') { | |
115 | saddr->sin_addr.s_addr = 0; | |
116 | } else { | |
cd390083 | 117 | if (qemu_isdigit(buf[0])) { |
63a01ef8 AL |
118 | if (!inet_aton(buf, &saddr->sin_addr)) |
119 | return -1; | |
120 | } else { | |
121 | if ((he = gethostbyname(buf)) == NULL) | |
122 | return - 1; | |
123 | saddr->sin_addr = *(struct in_addr *)he->h_addr; | |
124 | } | |
125 | } | |
126 | port = strtol(p, (char **)&r, 0); | |
127 | if (r == p) | |
128 | return -1; | |
129 | saddr->sin_port = htons(port); | |
130 | return 0; | |
131 | } | |
132 | ||
35277d14 | 133 | void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]) |
7cb7434b | 134 | { |
35277d14 | 135 | snprintf(nc->info_str, sizeof(nc->info_str), |
4dda4063 | 136 | "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x", |
35277d14 | 137 | nc->model, |
7cb7434b AL |
138 | macaddr[0], macaddr[1], macaddr[2], |
139 | macaddr[3], macaddr[4], macaddr[5]); | |
140 | } | |
141 | ||
76d32cba GH |
142 | void qemu_macaddr_default_if_unset(MACAddr *macaddr) |
143 | { | |
144 | static int index = 0; | |
145 | static const MACAddr zero = { .a = { 0,0,0,0,0,0 } }; | |
146 | ||
147 | if (memcmp(macaddr, &zero, sizeof(zero)) != 0) | |
148 | return; | |
149 | macaddr->a[0] = 0x52; | |
150 | macaddr->a[1] = 0x54; | |
151 | macaddr->a[2] = 0x00; | |
152 | macaddr->a[3] = 0x12; | |
153 | macaddr->a[4] = 0x34; | |
154 | macaddr->a[5] = 0x56 + index++; | |
155 | } | |
156 | ||
d33d93b2 SH |
157 | /** |
158 | * Generate a name for net client | |
159 | * | |
160 | * Only net clients created with the legacy -net option need this. Naming is | |
161 | * mandatory for net clients created with -netdev. | |
162 | */ | |
35277d14 | 163 | static char *assign_name(NetClientState *nc1, const char *model) |
676cff29 | 164 | { |
35277d14 | 165 | NetClientState *nc; |
676cff29 AL |
166 | char buf[256]; |
167 | int id = 0; | |
168 | ||
35277d14 SH |
169 | QTAILQ_FOREACH(nc, &net_clients, next) { |
170 | if (nc == nc1) { | |
d33d93b2 | 171 | continue; |
5610c3aa | 172 | } |
d33d93b2 | 173 | /* For compatibility only bump id for net clients on a vlan */ |
35277d14 SH |
174 | if (strcmp(nc->model, model) == 0 && |
175 | net_hub_id_for_client(nc, NULL) == 0) { | |
53e51d85 MA |
176 | id++; |
177 | } | |
178 | } | |
179 | ||
676cff29 AL |
180 | snprintf(buf, sizeof(buf), "%s.%d", model, id); |
181 | ||
7267c094 | 182 | return g_strdup(buf); |
676cff29 AL |
183 | } |
184 | ||
4e68f7a0 SH |
185 | NetClientState *qemu_new_net_client(NetClientInfo *info, |
186 | NetClientState *peer, | |
187 | const char *model, | |
188 | const char *name) | |
63a01ef8 | 189 | { |
35277d14 | 190 | NetClientState *nc; |
5610c3aa | 191 | |
4e68f7a0 | 192 | assert(info->size >= sizeof(NetClientState)); |
45460d1a | 193 | |
35277d14 | 194 | nc = g_malloc0(info->size); |
5610c3aa | 195 | |
35277d14 SH |
196 | nc->info = info; |
197 | nc->model = g_strdup(model); | |
45460d1a | 198 | if (name) { |
35277d14 | 199 | nc->name = g_strdup(name); |
45460d1a | 200 | } else { |
35277d14 | 201 | nc->name = assign_name(nc, model); |
45460d1a | 202 | } |
5610c3aa | 203 | |
ab5f3f84 SH |
204 | if (peer) { |
205 | assert(!peer->peer); | |
35277d14 SH |
206 | nc->peer = peer; |
207 | peer->peer = nc; | |
d80b9fc6 | 208 | } |
35277d14 | 209 | QTAILQ_INSERT_TAIL(&net_clients, nc, next); |
63a01ef8 | 210 | |
86a77c38 | 211 | nc->send_queue = qemu_new_net_queue(nc); |
63a01ef8 | 212 | |
35277d14 | 213 | return nc; |
63a01ef8 AL |
214 | } |
215 | ||
ebef2c09 MM |
216 | NICState *qemu_new_nic(NetClientInfo *info, |
217 | NICConf *conf, | |
218 | const char *model, | |
219 | const char *name, | |
220 | void *opaque) | |
221 | { | |
4e68f7a0 | 222 | NetClientState *nc; |
ebef2c09 MM |
223 | NICState *nic; |
224 | ||
2be64a68 | 225 | assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC); |
ebef2c09 MM |
226 | assert(info->size >= sizeof(NICState)); |
227 | ||
ab5f3f84 | 228 | nc = qemu_new_net_client(info, conf->peer, model, name); |
ebef2c09 MM |
229 | |
230 | nic = DO_UPCAST(NICState, nc, nc); | |
231 | nic->conf = conf; | |
232 | nic->opaque = opaque; | |
233 | ||
234 | return nic; | |
235 | } | |
236 | ||
b20c6b9e | 237 | static void qemu_cleanup_net_client(NetClientState *nc) |
63a01ef8 | 238 | { |
35277d14 | 239 | QTAILQ_REMOVE(&net_clients, nc, next); |
63a01ef8 | 240 | |
35277d14 SH |
241 | if (nc->info->cleanup) { |
242 | nc->info->cleanup(nc); | |
5610c3aa | 243 | } |
a083a89d | 244 | } |
5610c3aa | 245 | |
b20c6b9e | 246 | static void qemu_free_net_client(NetClientState *nc) |
a083a89d | 247 | { |
35277d14 SH |
248 | if (nc->send_queue) { |
249 | qemu_del_net_queue(nc->send_queue); | |
a005d073 | 250 | } |
35277d14 SH |
251 | if (nc->peer) { |
252 | nc->peer->peer = NULL; | |
a083a89d | 253 | } |
35277d14 SH |
254 | g_free(nc->name); |
255 | g_free(nc->model); | |
256 | g_free(nc); | |
63a01ef8 AL |
257 | } |
258 | ||
b20c6b9e | 259 | void qemu_del_net_client(NetClientState *nc) |
a083a89d MT |
260 | { |
261 | /* If there is a peer NIC, delete and cleanup client, but do not free. */ | |
35277d14 SH |
262 | if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { |
263 | NICState *nic = DO_UPCAST(NICState, nc, nc->peer); | |
a083a89d MT |
264 | if (nic->peer_deleted) { |
265 | return; | |
266 | } | |
267 | nic->peer_deleted = true; | |
268 | /* Let NIC know peer is gone. */ | |
35277d14 SH |
269 | nc->peer->link_down = true; |
270 | if (nc->peer->info->link_status_changed) { | |
271 | nc->peer->info->link_status_changed(nc->peer); | |
a083a89d | 272 | } |
b20c6b9e | 273 | qemu_cleanup_net_client(nc); |
a083a89d MT |
274 | return; |
275 | } | |
276 | ||
277 | /* If this is a peer NIC and peer has already been deleted, free it now. */ | |
35277d14 SH |
278 | if (nc->peer && nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { |
279 | NICState *nic = DO_UPCAST(NICState, nc, nc); | |
a083a89d | 280 | if (nic->peer_deleted) { |
b20c6b9e | 281 | qemu_free_net_client(nc->peer); |
1a609520 JK |
282 | } |
283 | } | |
1a609520 | 284 | |
b20c6b9e SH |
285 | qemu_cleanup_net_client(nc); |
286 | qemu_free_net_client(nc); | |
1a609520 JK |
287 | } |
288 | ||
57f9ef17 MM |
289 | void qemu_foreach_nic(qemu_nic_foreach func, void *opaque) |
290 | { | |
4e68f7a0 | 291 | NetClientState *nc; |
57f9ef17 | 292 | |
94878994 | 293 | QTAILQ_FOREACH(nc, &net_clients, next) { |
2be64a68 | 294 | if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { |
57f9ef17 MM |
295 | func(DO_UPCAST(NICState, nc, nc), opaque); |
296 | } | |
297 | } | |
57f9ef17 MM |
298 | } |
299 | ||
4e68f7a0 | 300 | int qemu_can_send_packet(NetClientState *sender) |
63a01ef8 | 301 | { |
a005d073 | 302 | if (!sender->peer) { |
d80b9fc6 MM |
303 | return 1; |
304 | } | |
305 | ||
a005d073 SH |
306 | if (sender->peer->receive_disabled) { |
307 | return 0; | |
308 | } else if (sender->peer->info->can_receive && | |
309 | !sender->peer->info->can_receive(sender->peer)) { | |
310 | return 0; | |
63a01ef8 | 311 | } |
60c07d93 | 312 | return 1; |
63a01ef8 AL |
313 | } |
314 | ||
86a77c38 ZYW |
315 | ssize_t qemu_deliver_packet(NetClientState *sender, |
316 | unsigned flags, | |
317 | const uint8_t *data, | |
318 | size_t size, | |
319 | void *opaque) | |
9a6ecb30 | 320 | { |
35277d14 | 321 | NetClientState *nc = opaque; |
893379ef | 322 | ssize_t ret; |
9a6ecb30 | 323 | |
35277d14 | 324 | if (nc->link_down) { |
9a6ecb30 MM |
325 | return size; |
326 | } | |
327 | ||
35277d14 | 328 | if (nc->receive_disabled) { |
893379ef MM |
329 | return 0; |
330 | } | |
331 | ||
35277d14 SH |
332 | if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) { |
333 | ret = nc->info->receive_raw(nc, data, size); | |
893379ef | 334 | } else { |
35277d14 | 335 | ret = nc->info->receive(nc, data, size); |
893379ef MM |
336 | } |
337 | ||
338 | if (ret == 0) { | |
35277d14 | 339 | nc->receive_disabled = 1; |
893379ef MM |
340 | }; |
341 | ||
342 | return ret; | |
9a6ecb30 MM |
343 | } |
344 | ||
35277d14 | 345 | void qemu_purge_queued_packets(NetClientState *nc) |
8cad5516 | 346 | { |
35277d14 | 347 | if (!nc->peer) { |
d80b9fc6 | 348 | return; |
9a6ecb30 | 349 | } |
d80b9fc6 | 350 | |
35277d14 | 351 | qemu_net_queue_purge(nc->peer->send_queue, nc); |
8cad5516 MM |
352 | } |
353 | ||
35277d14 | 354 | void qemu_flush_queued_packets(NetClientState *nc) |
e94667b9 | 355 | { |
35277d14 | 356 | nc->receive_disabled = 0; |
9a6ecb30 | 357 | |
987a9b48 PB |
358 | if (qemu_net_queue_flush(nc->send_queue)) { |
359 | /* We emptied the queue successfully, signal to the IO thread to repoll | |
360 | * the file descriptor (for tap, for example). | |
361 | */ | |
362 | qemu_notify_event(); | |
363 | } | |
e94667b9 MM |
364 | } |
365 | ||
4e68f7a0 | 366 | static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender, |
ca77d175 MM |
367 | unsigned flags, |
368 | const uint8_t *buf, int size, | |
369 | NetPacketSent *sent_cb) | |
764a4d1d | 370 | { |
9a6ecb30 | 371 | NetQueue *queue; |
436e5e53 | 372 | |
63a01ef8 | 373 | #ifdef DEBUG_NET |
d80b9fc6 | 374 | printf("qemu_send_packet_async:\n"); |
63a01ef8 AL |
375 | hex_dump(stdout, buf, size); |
376 | #endif | |
f3b6c7fc | 377 | |
a005d073 | 378 | if (sender->link_down || !sender->peer) { |
9a6ecb30 MM |
379 | return size; |
380 | } | |
381 | ||
a005d073 | 382 | queue = sender->peer->send_queue; |
9a6ecb30 | 383 | |
ca77d175 MM |
384 | return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb); |
385 | } | |
386 | ||
4e68f7a0 | 387 | ssize_t qemu_send_packet_async(NetClientState *sender, |
ca77d175 MM |
388 | const uint8_t *buf, int size, |
389 | NetPacketSent *sent_cb) | |
390 | { | |
391 | return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE, | |
392 | buf, size, sent_cb); | |
f3b6c7fc MM |
393 | } |
394 | ||
35277d14 | 395 | void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size) |
f3b6c7fc | 396 | { |
35277d14 | 397 | qemu_send_packet_async(nc, buf, size, NULL); |
63a01ef8 AL |
398 | } |
399 | ||
35277d14 | 400 | ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size) |
ca77d175 | 401 | { |
35277d14 | 402 | return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW, |
ca77d175 MM |
403 | buf, size, NULL); |
404 | } | |
405 | ||
35277d14 | 406 | static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov, |
fbe78f4f AL |
407 | int iovcnt) |
408 | { | |
409 | uint8_t buffer[4096]; | |
ce053661 | 410 | size_t offset; |
fbe78f4f | 411 | |
dcf6f5e1 | 412 | offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer)); |
fbe78f4f | 413 | |
35277d14 | 414 | return nc->info->receive(nc, buffer, offset); |
fbe78f4f AL |
415 | } |
416 | ||
86a77c38 ZYW |
417 | ssize_t qemu_deliver_packet_iov(NetClientState *sender, |
418 | unsigned flags, | |
419 | const struct iovec *iov, | |
420 | int iovcnt, | |
421 | void *opaque) | |
9a6ecb30 | 422 | { |
35277d14 | 423 | NetClientState *nc = opaque; |
c67f5dc1 | 424 | int ret; |
9a6ecb30 | 425 | |
35277d14 | 426 | if (nc->link_down) { |
ce053661 | 427 | return iov_size(iov, iovcnt); |
9a6ecb30 MM |
428 | } |
429 | ||
c67f5dc1 SH |
430 | if (nc->receive_disabled) { |
431 | return 0; | |
432 | } | |
433 | ||
35277d14 | 434 | if (nc->info->receive_iov) { |
c67f5dc1 | 435 | ret = nc->info->receive_iov(nc, iov, iovcnt); |
9a6ecb30 | 436 | } else { |
c67f5dc1 SH |
437 | ret = nc_sendv_compat(nc, iov, iovcnt); |
438 | } | |
439 | ||
440 | if (ret == 0) { | |
441 | nc->receive_disabled = 1; | |
e94667b9 | 442 | } |
c67f5dc1 SH |
443 | |
444 | return ret; | |
e94667b9 MM |
445 | } |
446 | ||
4e68f7a0 | 447 | ssize_t qemu_sendv_packet_async(NetClientState *sender, |
f3b6c7fc MM |
448 | const struct iovec *iov, int iovcnt, |
449 | NetPacketSent *sent_cb) | |
e94667b9 | 450 | { |
9a6ecb30 MM |
451 | NetQueue *queue; |
452 | ||
a005d073 | 453 | if (sender->link_down || !sender->peer) { |
ce053661 | 454 | return iov_size(iov, iovcnt); |
e94667b9 MM |
455 | } |
456 | ||
a005d073 | 457 | queue = sender->peer->send_queue; |
9a6ecb30 | 458 | |
c0b8e49c MM |
459 | return qemu_net_queue_send_iov(queue, sender, |
460 | QEMU_NET_PACKET_FLAG_NONE, | |
461 | iov, iovcnt, sent_cb); | |
fbe78f4f AL |
462 | } |
463 | ||
f3b6c7fc | 464 | ssize_t |
35277d14 | 465 | qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt) |
f3b6c7fc | 466 | { |
35277d14 | 467 | return qemu_sendv_packet_async(nc, iov, iovcnt, NULL); |
63a01ef8 AL |
468 | } |
469 | ||
4e68f7a0 | 470 | NetClientState *qemu_find_netdev(const char *id) |
5869c4d5 | 471 | { |
35277d14 | 472 | NetClientState *nc; |
5869c4d5 | 473 | |
35277d14 SH |
474 | QTAILQ_FOREACH(nc, &net_clients, next) { |
475 | if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) | |
85dde9a9 | 476 | continue; |
35277d14 SH |
477 | if (!strcmp(nc->name, id)) { |
478 | return nc; | |
5869c4d5 MM |
479 | } |
480 | } | |
481 | ||
482 | return NULL; | |
483 | } | |
484 | ||
7697079b AL |
485 | static int nic_get_free_idx(void) |
486 | { | |
487 | int index; | |
488 | ||
489 | for (index = 0; index < MAX_NICS; index++) | |
490 | if (!nd_table[index].used) | |
491 | return index; | |
492 | return -1; | |
493 | } | |
494 | ||
07caea31 MA |
495 | int qemu_show_nic_models(const char *arg, const char *const *models) |
496 | { | |
497 | int i; | |
498 | ||
c8057f95 | 499 | if (!arg || !is_help_option(arg)) { |
07caea31 | 500 | return 0; |
c8057f95 | 501 | } |
07caea31 MA |
502 | |
503 | fprintf(stderr, "qemu: Supported NIC models: "); | |
504 | for (i = 0 ; models[i]; i++) | |
505 | fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n'); | |
506 | return 1; | |
507 | } | |
508 | ||
d07f22c5 AL |
509 | void qemu_check_nic_model(NICInfo *nd, const char *model) |
510 | { | |
511 | const char *models[2]; | |
512 | ||
513 | models[0] = model; | |
514 | models[1] = NULL; | |
515 | ||
07caea31 MA |
516 | if (qemu_show_nic_models(nd->model, models)) |
517 | exit(0); | |
518 | if (qemu_find_nic_model(nd, models, model) < 0) | |
519 | exit(1); | |
d07f22c5 AL |
520 | } |
521 | ||
07caea31 MA |
522 | int qemu_find_nic_model(NICInfo *nd, const char * const *models, |
523 | const char *default_model) | |
d07f22c5 | 524 | { |
07caea31 | 525 | int i; |
d07f22c5 AL |
526 | |
527 | if (!nd->model) | |
7267c094 | 528 | nd->model = g_strdup(default_model); |
d07f22c5 | 529 | |
07caea31 MA |
530 | for (i = 0 ; models[i]; i++) { |
531 | if (strcmp(nd->model, models[i]) == 0) | |
532 | return i; | |
d07f22c5 AL |
533 | } |
534 | ||
6daf194d | 535 | error_report("Unsupported NIC model: %s", nd->model); |
07caea31 | 536 | return -1; |
d07f22c5 AL |
537 | } |
538 | ||
1a0c0958 | 539 | static int net_init_nic(const NetClientOptions *opts, const char *name, |
4e68f7a0 | 540 | NetClientState *peer) |
f83c6e10 MM |
541 | { |
542 | int idx; | |
543 | NICInfo *nd; | |
2456f36f LE |
544 | const NetLegacyNicOptions *nic; |
545 | ||
546 | assert(opts->kind == NET_CLIENT_OPTIONS_KIND_NIC); | |
547 | nic = opts->nic; | |
f83c6e10 MM |
548 | |
549 | idx = nic_get_free_idx(); | |
550 | if (idx == -1 || nb_nics >= MAX_NICS) { | |
1ecda02b | 551 | error_report("Too Many NICs"); |
f83c6e10 MM |
552 | return -1; |
553 | } | |
554 | ||
555 | nd = &nd_table[idx]; | |
556 | ||
557 | memset(nd, 0, sizeof(*nd)); | |
558 | ||
2456f36f LE |
559 | if (nic->has_netdev) { |
560 | nd->netdev = qemu_find_netdev(nic->netdev); | |
5869c4d5 | 561 | if (!nd->netdev) { |
2456f36f | 562 | error_report("netdev '%s' not found", nic->netdev); |
5869c4d5 MM |
563 | return -1; |
564 | } | |
565 | } else { | |
d33d93b2 SH |
566 | assert(peer); |
567 | nd->netdev = peer; | |
5869c4d5 | 568 | } |
6d952ebe | 569 | if (name) { |
7267c094 | 570 | nd->name = g_strdup(name); |
6d952ebe | 571 | } |
2456f36f LE |
572 | if (nic->has_model) { |
573 | nd->model = g_strdup(nic->model); | |
f83c6e10 | 574 | } |
2456f36f LE |
575 | if (nic->has_addr) { |
576 | nd->devaddr = g_strdup(nic->addr); | |
f83c6e10 MM |
577 | } |
578 | ||
2456f36f LE |
579 | if (nic->has_macaddr && |
580 | net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) { | |
1ecda02b | 581 | error_report("invalid syntax for ethernet address"); |
f83c6e10 MM |
582 | return -1; |
583 | } | |
6eed1856 | 584 | qemu_macaddr_default_if_unset(&nd->macaddr); |
f83c6e10 | 585 | |
2456f36f LE |
586 | if (nic->has_vectors) { |
587 | if (nic->vectors > 0x7ffffff) { | |
588 | error_report("invalid # of vectors: %"PRIu32, nic->vectors); | |
589 | return -1; | |
590 | } | |
591 | nd->nvectors = nic->vectors; | |
592 | } else { | |
593 | nd->nvectors = DEV_NVECTORS_UNSPECIFIED; | |
f83c6e10 MM |
594 | } |
595 | ||
596 | nd->used = 1; | |
f83c6e10 MM |
597 | nb_nics++; |
598 | ||
599 | return idx; | |
600 | } | |
601 | ||
6687b79d LE |
602 | |
603 | static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])( | |
1a0c0958 | 604 | const NetClientOptions *opts, |
6687b79d | 605 | const char *name, |
4e68f7a0 | 606 | NetClientState *peer) = { |
f6c874e3 | 607 | [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic, |
ec302ffd | 608 | #ifdef CONFIG_SLIRP |
f6c874e3 | 609 | [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp, |
2944e4ec | 610 | #endif |
f6c874e3 SH |
611 | [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap, |
612 | [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket, | |
dd51058d | 613 | #ifdef CONFIG_VDE |
f6c874e3 | 614 | [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde, |
dd51058d | 615 | #endif |
f6c874e3 | 616 | [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump, |
2944e4ec | 617 | #ifdef CONFIG_NET_BRIDGE |
f6c874e3 | 618 | [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge, |
6687b79d | 619 | #endif |
f6c874e3 | 620 | [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport, |
f83c6e10 MM |
621 | }; |
622 | ||
6687b79d | 623 | |
1a0c0958 | 624 | static int net_client_init1(const void *object, int is_netdev, Error **errp) |
f83c6e10 | 625 | { |
6687b79d LE |
626 | union { |
627 | const Netdev *netdev; | |
628 | const NetLegacy *net; | |
629 | } u; | |
630 | const NetClientOptions *opts; | |
6d952ebe | 631 | const char *name; |
f83c6e10 | 632 | |
5294e2c7 | 633 | if (is_netdev) { |
6687b79d LE |
634 | u.netdev = object; |
635 | opts = u.netdev->opts; | |
636 | name = u.netdev->id; | |
637 | ||
638 | switch (opts->kind) { | |
f6b134ac | 639 | #ifdef CONFIG_SLIRP |
6687b79d | 640 | case NET_CLIENT_OPTIONS_KIND_USER: |
f6b134ac | 641 | #endif |
6687b79d LE |
642 | case NET_CLIENT_OPTIONS_KIND_TAP: |
643 | case NET_CLIENT_OPTIONS_KIND_SOCKET: | |
f6b134ac | 644 | #ifdef CONFIG_VDE |
6687b79d LE |
645 | case NET_CLIENT_OPTIONS_KIND_VDE: |
646 | #endif | |
647 | #ifdef CONFIG_NET_BRIDGE | |
648 | case NET_CLIENT_OPTIONS_KIND_BRIDGE: | |
f6b134ac | 649 | #endif |
f6c874e3 | 650 | case NET_CLIENT_OPTIONS_KIND_HUBPORT: |
6687b79d LE |
651 | break; |
652 | ||
653 | default: | |
4559a1db LC |
654 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type", |
655 | "a netdev backend type"); | |
f6b134ac MM |
656 | return -1; |
657 | } | |
6687b79d LE |
658 | } else { |
659 | u.net = object; | |
660 | opts = u.net->opts; | |
661 | /* missing optional values have been initialized to "all bits zero" */ | |
662 | name = u.net->has_id ? u.net->id : u.net->name; | |
663 | } | |
f6b134ac | 664 | |
6687b79d | 665 | if (net_client_init_fun[opts->kind]) { |
4e68f7a0 | 666 | NetClientState *peer = NULL; |
6687b79d LE |
667 | |
668 | /* Do not add to a vlan if it's a -netdev or a nic with a netdev= | |
669 | * parameter. */ | |
670 | if (!is_netdev && | |
671 | (opts->kind != NET_CLIENT_OPTIONS_KIND_NIC || | |
672 | !opts->nic->has_netdev)) { | |
d33d93b2 | 673 | peer = net_hub_add_port(u.net->has_vlan ? u.net->vlan : 0, NULL); |
f6b134ac | 674 | } |
6687b79d | 675 | |
d33d93b2 | 676 | if (net_client_init_fun[opts->kind](opts, name, peer) < 0) { |
6687b79d LE |
677 | /* TODO push error reporting into init() methods */ |
678 | error_set(errp, QERR_DEVICE_INIT_FAILED, | |
679 | NetClientOptionsKind_lookup[opts->kind]); | |
f6b134ac MM |
680 | return -1; |
681 | } | |
682 | } | |
6687b79d LE |
683 | return 0; |
684 | } | |
685 | ||
f6b134ac | 686 | |
6687b79d LE |
687 | static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp) |
688 | { | |
689 | if (is_netdev) { | |
690 | visit_type_Netdev(v, (Netdev **)object, NULL, errp); | |
691 | } else { | |
692 | visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp); | |
6d952ebe | 693 | } |
6687b79d | 694 | } |
6d952ebe | 695 | |
f6b134ac | 696 | |
6687b79d LE |
697 | int net_client_init(QemuOpts *opts, int is_netdev, Error **errp) |
698 | { | |
699 | void *object = NULL; | |
700 | Error *err = NULL; | |
701 | int ret = -1; | |
f83c6e10 | 702 | |
6687b79d LE |
703 | { |
704 | OptsVisitor *ov = opts_visitor_new(opts); | |
f6b134ac | 705 | |
6687b79d LE |
706 | net_visit(opts_get_visitor(ov), is_netdev, &object, &err); |
707 | opts_visitor_cleanup(ov); | |
f83c6e10 MM |
708 | } |
709 | ||
6687b79d | 710 | if (!err) { |
1a0c0958 | 711 | ret = net_client_init1(object, is_netdev, &err); |
6687b79d LE |
712 | } |
713 | ||
714 | if (object) { | |
715 | QapiDeallocVisitor *dv = qapi_dealloc_visitor_new(); | |
716 | ||
717 | net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL); | |
718 | qapi_dealloc_visitor_cleanup(dv); | |
719 | } | |
720 | ||
721 | error_propagate(errp, err); | |
722 | return ret; | |
f83c6e10 MM |
723 | } |
724 | ||
6687b79d | 725 | |
6f338c34 AL |
726 | static int net_host_check_device(const char *device) |
727 | { | |
728 | int i; | |
bb9ea79e | 729 | const char *valid_param_list[] = { "tap", "socket", "dump" |
2944e4ec SW |
730 | #ifdef CONFIG_NET_BRIDGE |
731 | , "bridge" | |
732 | #endif | |
6f338c34 AL |
733 | #ifdef CONFIG_SLIRP |
734 | ,"user" | |
735 | #endif | |
736 | #ifdef CONFIG_VDE | |
737 | ,"vde" | |
738 | #endif | |
739 | }; | |
740 | for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) { | |
741 | if (!strncmp(valid_param_list[i], device, | |
742 | strlen(valid_param_list[i]))) | |
743 | return 1; | |
744 | } | |
745 | ||
746 | return 0; | |
747 | } | |
748 | ||
f18c16de | 749 | void net_host_device_add(Monitor *mon, const QDict *qdict) |
6f338c34 | 750 | { |
f18c16de | 751 | const char *device = qdict_get_str(qdict, "device"); |
7f1c9d20 | 752 | const char *opts_str = qdict_get_try_str(qdict, "opts"); |
4559a1db | 753 | Error *local_err = NULL; |
7f1c9d20 | 754 | QemuOpts *opts; |
f18c16de | 755 | |
6f338c34 | 756 | if (!net_host_check_device(device)) { |
376253ec | 757 | monitor_printf(mon, "invalid host network device %s\n", device); |
6f338c34 AL |
758 | return; |
759 | } | |
7f1c9d20 | 760 | |
3329f07b | 761 | opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0); |
7f1c9d20 | 762 | if (!opts) { |
7f1c9d20 MM |
763 | return; |
764 | } | |
765 | ||
766 | qemu_opt_set(opts, "type", device); | |
767 | ||
4559a1db LC |
768 | net_client_init(opts, 0, &local_err); |
769 | if (error_is_set(&local_err)) { | |
770 | qerror_report_err(local_err); | |
771 | error_free(local_err); | |
5c8be678 AL |
772 | monitor_printf(mon, "adding host network device %s failed\n", device); |
773 | } | |
6f338c34 AL |
774 | } |
775 | ||
f18c16de | 776 | void net_host_device_remove(Monitor *mon, const QDict *qdict) |
6f338c34 | 777 | { |
35277d14 | 778 | NetClientState *nc; |
f18c16de LC |
779 | int vlan_id = qdict_get_int(qdict, "vlan_id"); |
780 | const char *device = qdict_get_str(qdict, "device"); | |
6f338c34 | 781 | |
35277d14 SH |
782 | nc = net_hub_find_client_by_name(vlan_id, device); |
783 | if (!nc) { | |
6f338c34 AL |
784 | return; |
785 | } | |
35277d14 | 786 | if (!net_host_check_device(nc->model)) { |
e8f1f9db AL |
787 | monitor_printf(mon, "invalid host network device %s\n", device); |
788 | return; | |
789 | } | |
b20c6b9e | 790 | qemu_del_net_client(nc); |
6f338c34 AL |
791 | } |
792 | ||
928059a3 LC |
793 | void netdev_add(QemuOpts *opts, Error **errp) |
794 | { | |
795 | net_client_init(opts, 1, errp); | |
796 | } | |
797 | ||
798 | int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret) | |
ae82d324 | 799 | { |
4e89978e | 800 | Error *local_err = NULL; |
928059a3 | 801 | QemuOptsList *opts_list; |
ae82d324 | 802 | QemuOpts *opts; |
ae82d324 | 803 | |
928059a3 LC |
804 | opts_list = qemu_find_opts_err("netdev", &local_err); |
805 | if (error_is_set(&local_err)) { | |
806 | goto exit_err; | |
ae82d324 MA |
807 | } |
808 | ||
928059a3 LC |
809 | opts = qemu_opts_from_qdict(opts_list, qdict, &local_err); |
810 | if (error_is_set(&local_err)) { | |
811 | goto exit_err; | |
812 | } | |
813 | ||
814 | netdev_add(opts, &local_err); | |
815 | if (error_is_set(&local_err)) { | |
410cbafe | 816 | qemu_opts_del(opts); |
928059a3 | 817 | goto exit_err; |
410cbafe YT |
818 | } |
819 | ||
928059a3 LC |
820 | return 0; |
821 | ||
822 | exit_err: | |
823 | qerror_report_err(local_err); | |
824 | error_free(local_err); | |
825 | return -1; | |
ae82d324 MA |
826 | } |
827 | ||
5f964155 | 828 | void qmp_netdev_del(const char *id, Error **errp) |
ae82d324 | 829 | { |
35277d14 | 830 | NetClientState *nc; |
645c9496 | 831 | QemuOpts *opts; |
ae82d324 | 832 | |
35277d14 SH |
833 | nc = qemu_find_netdev(id); |
834 | if (!nc) { | |
5f964155 LC |
835 | error_set(errp, QERR_DEVICE_NOT_FOUND, id); |
836 | return; | |
ae82d324 | 837 | } |
5f964155 | 838 | |
645c9496 SH |
839 | opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id); |
840 | if (!opts) { | |
841 | error_setg(errp, "Device '%s' is not a netdev", id); | |
842 | return; | |
843 | } | |
844 | ||
b20c6b9e | 845 | qemu_del_net_client(nc); |
645c9496 | 846 | qemu_opts_del(opts); |
ae82d324 MA |
847 | } |
848 | ||
1a859593 | 849 | void print_net_client(Monitor *mon, NetClientState *nc) |
44e798d3 | 850 | { |
35277d14 SH |
851 | monitor_printf(mon, "%s: type=%s,%s\n", nc->name, |
852 | NetClientOptionsKind_lookup[nc->info->type], nc->info_str); | |
44e798d3 JK |
853 | } |
854 | ||
376253ec | 855 | void do_info_network(Monitor *mon) |
63a01ef8 | 856 | { |
35277d14 | 857 | NetClientState *nc, *peer; |
2be64a68 | 858 | NetClientOptionsKind type; |
63a01ef8 | 859 | |
1a859593 ZYW |
860 | net_hub_info(mon); |
861 | ||
35277d14 SH |
862 | QTAILQ_FOREACH(nc, &net_clients, next) { |
863 | peer = nc->peer; | |
864 | type = nc->info->type; | |
5610c3aa | 865 | |
1a859593 ZYW |
866 | /* Skip if already printed in hub info */ |
867 | if (net_hub_id_for_client(nc, NULL) == 0) { | |
868 | continue; | |
5610c3aa | 869 | } |
1a859593 | 870 | |
2be64a68 | 871 | if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) { |
35277d14 | 872 | print_net_client(mon, nc); |
19061e63 | 873 | } /* else it's a netdev connected to a NIC, printed with the NIC */ |
2be64a68 | 874 | if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) { |
1a859593 | 875 | monitor_printf(mon, " \\ "); |
44e798d3 | 876 | print_net_client(mon, peer); |
a0104e0e | 877 | } |
a0104e0e | 878 | } |
63a01ef8 AL |
879 | } |
880 | ||
4b37156c | 881 | void qmp_set_link(const char *name, bool up, Error **errp) |
436e5e53 | 882 | { |
35277d14 | 883 | NetClientState *nc = NULL; |
436e5e53 | 884 | |
35277d14 SH |
885 | QTAILQ_FOREACH(nc, &net_clients, next) { |
886 | if (!strcmp(nc->name, name)) { | |
85dde9a9 MA |
887 | goto done; |
888 | } | |
889 | } | |
dd5de373 | 890 | done: |
35277d14 | 891 | if (!nc) { |
4b37156c LC |
892 | error_set(errp, QERR_DEVICE_NOT_FOUND, name); |
893 | return; | |
436e5e53 AL |
894 | } |
895 | ||
35277d14 | 896 | nc->link_down = !up; |
436e5e53 | 897 | |
35277d14 SH |
898 | if (nc->info->link_status_changed) { |
899 | nc->info->link_status_changed(nc); | |
665a3b07 | 900 | } |
ab1cbe1c MT |
901 | |
902 | /* Notify peer. Don't update peer link status: this makes it possible to | |
903 | * disconnect from host network without notifying the guest. | |
904 | * FIXME: is disconnected link status change operation useful? | |
905 | * | |
906 | * Current behaviour is compatible with qemu vlans where there could be | |
907 | * multiple clients that can still communicate with each other in | |
908 | * disconnected mode. For now maintain this compatibility. */ | |
35277d14 SH |
909 | if (nc->peer && nc->peer->info->link_status_changed) { |
910 | nc->peer->info->link_status_changed(nc->peer); | |
ab1cbe1c | 911 | } |
436e5e53 AL |
912 | } |
913 | ||
63a01ef8 AL |
914 | void net_cleanup(void) |
915 | { | |
35277d14 | 916 | NetClientState *nc, *next_vc; |
577c4af9 | 917 | |
35277d14 | 918 | QTAILQ_FOREACH_SAFE(nc, &net_clients, next, next_vc) { |
b20c6b9e | 919 | qemu_del_net_client(nc); |
577c4af9 | 920 | } |
63a01ef8 AL |
921 | } |
922 | ||
668680f7 | 923 | void net_check_clients(void) |
63a01ef8 | 924 | { |
35277d14 | 925 | NetClientState *nc; |
48e2faf2 | 926 | int i; |
63a01ef8 | 927 | |
641f6eae PM |
928 | /* Don't warn about the default network setup that you get if |
929 | * no command line -net or -netdev options are specified. There | |
930 | * are two cases that we would otherwise complain about: | |
931 | * (1) board doesn't support a NIC but the implicit "-net nic" | |
932 | * requested one | |
933 | * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic" | |
934 | * sets up a nic that isn't connected to anything. | |
935 | */ | |
936 | if (default_net) { | |
937 | return; | |
938 | } | |
939 | ||
81017645 | 940 | net_hub_check_clients(); |
ac60cc18 | 941 | |
35277d14 SH |
942 | QTAILQ_FOREACH(nc, &net_clients, next) { |
943 | if (!nc->peer) { | |
efe32fdd | 944 | fprintf(stderr, "Warning: %s %s has no peer\n", |
35277d14 SH |
945 | nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ? |
946 | "nic" : "netdev", nc->name); | |
efe32fdd MA |
947 | } |
948 | } | |
48e2faf2 PM |
949 | |
950 | /* Check that all NICs requested via -net nic actually got created. | |
951 | * NICs created via -device don't need to be checked here because | |
952 | * they are always instantiated. | |
953 | */ | |
954 | for (i = 0; i < MAX_NICS; i++) { | |
955 | NICInfo *nd = &nd_table[i]; | |
956 | if (nd->used && !nd->instantiated) { | |
957 | fprintf(stderr, "Warning: requested NIC (%s, model %s) " | |
958 | "was not created (not supported by this machine?)\n", | |
959 | nd->name ? nd->name : "anonymous", | |
960 | nd->model ? nd->model : "unspecified"); | |
961 | } | |
962 | } | |
63a01ef8 | 963 | } |
dc1c9fe8 MM |
964 | |
965 | static int net_init_client(QemuOpts *opts, void *dummy) | |
966 | { | |
4559a1db LC |
967 | Error *local_err = NULL; |
968 | ||
969 | net_client_init(opts, 0, &local_err); | |
970 | if (error_is_set(&local_err)) { | |
971 | qerror_report_err(local_err); | |
972 | error_free(local_err); | |
c1671a08 | 973 | return -1; |
4559a1db LC |
974 | } |
975 | ||
c1671a08 | 976 | return 0; |
f6b134ac MM |
977 | } |
978 | ||
979 | static int net_init_netdev(QemuOpts *opts, void *dummy) | |
980 | { | |
4559a1db LC |
981 | Error *local_err = NULL; |
982 | int ret; | |
983 | ||
984 | ret = net_client_init(opts, 1, &local_err); | |
985 | if (error_is_set(&local_err)) { | |
986 | qerror_report_err(local_err); | |
987 | error_free(local_err); | |
988 | return -1; | |
989 | } | |
990 | ||
991 | return ret; | |
dc1c9fe8 MM |
992 | } |
993 | ||
994 | int net_init_clients(void) | |
995 | { | |
3329f07b GH |
996 | QemuOptsList *net = qemu_find_opts("net"); |
997 | ||
cb4522cc | 998 | if (default_net) { |
dc1c9fe8 | 999 | /* if no clients, we use a default config */ |
3329f07b | 1000 | qemu_opts_set(net, NULL, "type", "nic"); |
dc1c9fe8 | 1001 | #ifdef CONFIG_SLIRP |
3329f07b | 1002 | qemu_opts_set(net, NULL, "type", "user"); |
dc1c9fe8 MM |
1003 | #endif |
1004 | } | |
1005 | ||
94878994 | 1006 | QTAILQ_INIT(&net_clients); |
5610c3aa | 1007 | |
3329f07b | 1008 | if (qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL, 1) == -1) |
f6b134ac MM |
1009 | return -1; |
1010 | ||
3329f07b | 1011 | if (qemu_opts_foreach(net, net_init_client, NULL, 1) == -1) { |
dc1c9fe8 MM |
1012 | return -1; |
1013 | } | |
1014 | ||
dc1c9fe8 MM |
1015 | return 0; |
1016 | } | |
1017 | ||
7f161aae | 1018 | int net_client_parse(QemuOptsList *opts_list, const char *optarg) |
dc1c9fe8 | 1019 | { |
a3a766e7 | 1020 | #if defined(CONFIG_SLIRP) |
68ac40d2 MM |
1021 | int ret; |
1022 | if (net_slirp_parse_legacy(opts_list, optarg, &ret)) { | |
dc1c9fe8 MM |
1023 | return ret; |
1024 | } | |
a3a766e7 | 1025 | #endif |
68ac40d2 | 1026 | |
8212c64f | 1027 | if (!qemu_opts_parse(opts_list, optarg, 1)) { |
dc1c9fe8 MM |
1028 | return -1; |
1029 | } | |
1030 | ||
cb4522cc | 1031 | default_net = 0; |
dc1c9fe8 MM |
1032 | return 0; |
1033 | } | |
7fc8d918 JW |
1034 | |
1035 | /* From FreeBSD */ | |
1036 | /* XXX: optimize */ | |
1037 | unsigned compute_mcast_idx(const uint8_t *ep) | |
1038 | { | |
1039 | uint32_t crc; | |
1040 | int carry, i, j; | |
1041 | uint8_t b; | |
1042 | ||
1043 | crc = 0xffffffff; | |
1044 | for (i = 0; i < 6; i++) { | |
1045 | b = *ep++; | |
1046 | for (j = 0; j < 8; j++) { | |
1047 | carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01); | |
1048 | crc <<= 1; | |
1049 | b >>= 1; | |
1050 | if (carry) { | |
1051 | crc = ((crc ^ POLYNOMIAL) | carry); | |
1052 | } | |
1053 | } | |
1054 | } | |
1055 | return crc >> 26; | |
1056 | } |