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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 | ||
a245fc18 PB |
26 | #include "net.h" |
27 | #include "net/clients.h" | |
f6c874e3 | 28 | #include "net/hub.h" |
a245fc18 | 29 | #include "net/slirp.h" |
f1d078c3 | 30 | #include "net/util.h" |
a245fc18 | 31 | |
511d2b14 | 32 | #include "monitor.h" |
1df49e04 | 33 | #include "qemu-common.h" |
511d2b14 | 34 | #include "qemu_socket.h" |
4b37156c | 35 | #include "qmp-commands.h" |
75422b0d | 36 | #include "hw/qdev.h" |
ce053661 | 37 | #include "iov.h" |
6687b79d LE |
38 | #include "qapi-visit.h" |
39 | #include "qapi/opts-visitor.h" | |
40 | #include "qapi/qapi-dealloc-visitor.h" | |
511d2b14 | 41 | |
2944e4ec SW |
42 | /* Net bridge is currently not supported for W32. */ |
43 | #if !defined(_WIN32) | |
44 | # define CONFIG_NET_BRIDGE | |
45 | #endif | |
46 | ||
4e68f7a0 | 47 | static QTAILQ_HEAD(, NetClientState) net_clients; |
63a01ef8 | 48 | |
cb4522cc GH |
49 | int default_net = 1; |
50 | ||
63a01ef8 AL |
51 | /***********************************************************/ |
52 | /* network device redirectors */ | |
53 | ||
68ac40d2 | 54 | #if defined(DEBUG_NET) |
63a01ef8 AL |
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 | ||
63a01ef8 AL |
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 | ||
63a01ef8 AL |
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 { | |
cd390083 | 116 | if (qemu_isdigit(buf[0])) { |
63a01ef8 AL |
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 | ||
35277d14 | 132 | void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]) |
7cb7434b | 133 | { |
35277d14 | 134 | snprintf(nc->info_str, sizeof(nc->info_str), |
4dda4063 | 135 | "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x", |
35277d14 | 136 | nc->model, |
7cb7434b AL |
137 | macaddr[0], macaddr[1], macaddr[2], |
138 | macaddr[3], macaddr[4], macaddr[5]); | |
139 | } | |
140 | ||
76d32cba GH |
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 | ||
d33d93b2 SH |
156 | /** |
157 | * Generate a name for net client | |
158 | * | |
159 | * Only net clients created with the legacy -net option need this. Naming is | |
160 | * mandatory for net clients created with -netdev. | |
161 | */ | |
35277d14 | 162 | static char *assign_name(NetClientState *nc1, const char *model) |
676cff29 | 163 | { |
35277d14 | 164 | NetClientState *nc; |
676cff29 AL |
165 | char buf[256]; |
166 | int id = 0; | |
167 | ||
35277d14 SH |
168 | QTAILQ_FOREACH(nc, &net_clients, next) { |
169 | if (nc == nc1) { | |
d33d93b2 | 170 | continue; |
5610c3aa | 171 | } |
d33d93b2 | 172 | /* For compatibility only bump id for net clients on a vlan */ |
35277d14 SH |
173 | if (strcmp(nc->model, model) == 0 && |
174 | net_hub_id_for_client(nc, NULL) == 0) { | |
53e51d85 MA |
175 | id++; |
176 | } | |
177 | } | |
178 | ||
676cff29 AL |
179 | snprintf(buf, sizeof(buf), "%s.%d", model, id); |
180 | ||
7267c094 | 181 | return g_strdup(buf); |
676cff29 AL |
182 | } |
183 | ||
4e68f7a0 SH |
184 | NetClientState *qemu_new_net_client(NetClientInfo *info, |
185 | NetClientState *peer, | |
186 | const char *model, | |
187 | const char *name) | |
63a01ef8 | 188 | { |
35277d14 | 189 | NetClientState *nc; |
5610c3aa | 190 | |
4e68f7a0 | 191 | assert(info->size >= sizeof(NetClientState)); |
45460d1a | 192 | |
35277d14 | 193 | nc = g_malloc0(info->size); |
5610c3aa | 194 | |
35277d14 SH |
195 | nc->info = info; |
196 | nc->model = g_strdup(model); | |
45460d1a | 197 | if (name) { |
35277d14 | 198 | nc->name = g_strdup(name); |
45460d1a | 199 | } else { |
35277d14 | 200 | nc->name = assign_name(nc, model); |
45460d1a | 201 | } |
5610c3aa | 202 | |
ab5f3f84 SH |
203 | if (peer) { |
204 | assert(!peer->peer); | |
35277d14 SH |
205 | nc->peer = peer; |
206 | peer->peer = nc; | |
d80b9fc6 | 207 | } |
35277d14 | 208 | QTAILQ_INSERT_TAIL(&net_clients, nc, next); |
63a01ef8 | 209 | |
86a77c38 | 210 | nc->send_queue = qemu_new_net_queue(nc); |
63a01ef8 | 211 | |
35277d14 | 212 | return nc; |
63a01ef8 AL |
213 | } |
214 | ||
ebef2c09 MM |
215 | NICState *qemu_new_nic(NetClientInfo *info, |
216 | NICConf *conf, | |
217 | const char *model, | |
218 | const char *name, | |
219 | void *opaque) | |
220 | { | |
4e68f7a0 | 221 | NetClientState *nc; |
ebef2c09 MM |
222 | NICState *nic; |
223 | ||
2be64a68 | 224 | assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC); |
ebef2c09 MM |
225 | assert(info->size >= sizeof(NICState)); |
226 | ||
ab5f3f84 | 227 | nc = qemu_new_net_client(info, conf->peer, model, name); |
ebef2c09 MM |
228 | |
229 | nic = DO_UPCAST(NICState, nc, nc); | |
230 | nic->conf = conf; | |
231 | nic->opaque = opaque; | |
232 | ||
233 | return nic; | |
234 | } | |
235 | ||
b20c6b9e | 236 | static void qemu_cleanup_net_client(NetClientState *nc) |
63a01ef8 | 237 | { |
35277d14 | 238 | QTAILQ_REMOVE(&net_clients, nc, next); |
63a01ef8 | 239 | |
35277d14 SH |
240 | if (nc->info->cleanup) { |
241 | nc->info->cleanup(nc); | |
5610c3aa | 242 | } |
a083a89d | 243 | } |
5610c3aa | 244 | |
b20c6b9e | 245 | static void qemu_free_net_client(NetClientState *nc) |
a083a89d | 246 | { |
35277d14 SH |
247 | if (nc->send_queue) { |
248 | qemu_del_net_queue(nc->send_queue); | |
a005d073 | 249 | } |
35277d14 SH |
250 | if (nc->peer) { |
251 | nc->peer->peer = NULL; | |
a083a89d | 252 | } |
35277d14 SH |
253 | g_free(nc->name); |
254 | g_free(nc->model); | |
255 | g_free(nc); | |
63a01ef8 AL |
256 | } |
257 | ||
b20c6b9e | 258 | void qemu_del_net_client(NetClientState *nc) |
a083a89d MT |
259 | { |
260 | /* If there is a peer NIC, delete and cleanup client, but do not free. */ | |
35277d14 SH |
261 | if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { |
262 | NICState *nic = DO_UPCAST(NICState, nc, nc->peer); | |
a083a89d MT |
263 | if (nic->peer_deleted) { |
264 | return; | |
265 | } | |
266 | nic->peer_deleted = true; | |
267 | /* Let NIC know peer is gone. */ | |
35277d14 SH |
268 | nc->peer->link_down = true; |
269 | if (nc->peer->info->link_status_changed) { | |
270 | nc->peer->info->link_status_changed(nc->peer); | |
a083a89d | 271 | } |
b20c6b9e | 272 | qemu_cleanup_net_client(nc); |
a083a89d MT |
273 | return; |
274 | } | |
275 | ||
276 | /* If this is a peer NIC and peer has already been deleted, free it now. */ | |
35277d14 SH |
277 | if (nc->peer && nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { |
278 | NICState *nic = DO_UPCAST(NICState, nc, nc); | |
a083a89d | 279 | if (nic->peer_deleted) { |
b20c6b9e | 280 | qemu_free_net_client(nc->peer); |
1a609520 JK |
281 | } |
282 | } | |
1a609520 | 283 | |
b20c6b9e SH |
284 | qemu_cleanup_net_client(nc); |
285 | qemu_free_net_client(nc); | |
1a609520 JK |
286 | } |
287 | ||
57f9ef17 MM |
288 | void qemu_foreach_nic(qemu_nic_foreach func, void *opaque) |
289 | { | |
4e68f7a0 | 290 | NetClientState *nc; |
57f9ef17 | 291 | |
94878994 | 292 | QTAILQ_FOREACH(nc, &net_clients, next) { |
2be64a68 | 293 | if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { |
57f9ef17 MM |
294 | func(DO_UPCAST(NICState, nc, nc), opaque); |
295 | } | |
296 | } | |
57f9ef17 MM |
297 | } |
298 | ||
4e68f7a0 | 299 | int qemu_can_send_packet(NetClientState *sender) |
63a01ef8 | 300 | { |
a005d073 | 301 | if (!sender->peer) { |
d80b9fc6 MM |
302 | return 1; |
303 | } | |
304 | ||
a005d073 SH |
305 | if (sender->peer->receive_disabled) { |
306 | return 0; | |
307 | } else if (sender->peer->info->can_receive && | |
308 | !sender->peer->info->can_receive(sender->peer)) { | |
309 | return 0; | |
63a01ef8 | 310 | } |
60c07d93 | 311 | return 1; |
63a01ef8 AL |
312 | } |
313 | ||
86a77c38 ZYW |
314 | ssize_t qemu_deliver_packet(NetClientState *sender, |
315 | unsigned flags, | |
316 | const uint8_t *data, | |
317 | size_t size, | |
318 | void *opaque) | |
9a6ecb30 | 319 | { |
35277d14 | 320 | NetClientState *nc = opaque; |
893379ef | 321 | ssize_t ret; |
9a6ecb30 | 322 | |
35277d14 | 323 | if (nc->link_down) { |
9a6ecb30 MM |
324 | return size; |
325 | } | |
326 | ||
35277d14 | 327 | if (nc->receive_disabled) { |
893379ef MM |
328 | return 0; |
329 | } | |
330 | ||
35277d14 SH |
331 | if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) { |
332 | ret = nc->info->receive_raw(nc, data, size); | |
893379ef | 333 | } else { |
35277d14 | 334 | ret = nc->info->receive(nc, data, size); |
893379ef MM |
335 | } |
336 | ||
337 | if (ret == 0) { | |
35277d14 | 338 | nc->receive_disabled = 1; |
893379ef MM |
339 | }; |
340 | ||
341 | return ret; | |
9a6ecb30 MM |
342 | } |
343 | ||
35277d14 | 344 | void qemu_purge_queued_packets(NetClientState *nc) |
8cad5516 | 345 | { |
35277d14 | 346 | if (!nc->peer) { |
d80b9fc6 | 347 | return; |
9a6ecb30 | 348 | } |
d80b9fc6 | 349 | |
35277d14 | 350 | qemu_net_queue_purge(nc->peer->send_queue, nc); |
8cad5516 MM |
351 | } |
352 | ||
35277d14 | 353 | void qemu_flush_queued_packets(NetClientState *nc) |
e94667b9 | 354 | { |
35277d14 | 355 | nc->receive_disabled = 0; |
9a6ecb30 | 356 | |
987a9b48 PB |
357 | if (qemu_net_queue_flush(nc->send_queue)) { |
358 | /* We emptied the queue successfully, signal to the IO thread to repoll | |
359 | * the file descriptor (for tap, for example). | |
360 | */ | |
361 | qemu_notify_event(); | |
362 | } | |
e94667b9 MM |
363 | } |
364 | ||
4e68f7a0 | 365 | static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender, |
ca77d175 MM |
366 | unsigned flags, |
367 | const uint8_t *buf, int size, | |
368 | NetPacketSent *sent_cb) | |
764a4d1d | 369 | { |
9a6ecb30 | 370 | NetQueue *queue; |
436e5e53 | 371 | |
63a01ef8 | 372 | #ifdef DEBUG_NET |
d80b9fc6 | 373 | printf("qemu_send_packet_async:\n"); |
63a01ef8 AL |
374 | hex_dump(stdout, buf, size); |
375 | #endif | |
f3b6c7fc | 376 | |
a005d073 | 377 | if (sender->link_down || !sender->peer) { |
9a6ecb30 MM |
378 | return size; |
379 | } | |
380 | ||
a005d073 | 381 | queue = sender->peer->send_queue; |
9a6ecb30 | 382 | |
ca77d175 MM |
383 | return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb); |
384 | } | |
385 | ||
4e68f7a0 | 386 | ssize_t qemu_send_packet_async(NetClientState *sender, |
ca77d175 MM |
387 | const uint8_t *buf, int size, |
388 | NetPacketSent *sent_cb) | |
389 | { | |
390 | return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE, | |
391 | buf, size, sent_cb); | |
f3b6c7fc MM |
392 | } |
393 | ||
35277d14 | 394 | void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size) |
f3b6c7fc | 395 | { |
35277d14 | 396 | qemu_send_packet_async(nc, buf, size, NULL); |
63a01ef8 AL |
397 | } |
398 | ||
35277d14 | 399 | ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size) |
ca77d175 | 400 | { |
35277d14 | 401 | return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW, |
ca77d175 MM |
402 | buf, size, NULL); |
403 | } | |
404 | ||
35277d14 | 405 | static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov, |
fbe78f4f AL |
406 | int iovcnt) |
407 | { | |
408 | uint8_t buffer[4096]; | |
ce053661 | 409 | size_t offset; |
fbe78f4f | 410 | |
dcf6f5e1 | 411 | offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer)); |
fbe78f4f | 412 | |
35277d14 | 413 | return nc->info->receive(nc, buffer, offset); |
fbe78f4f AL |
414 | } |
415 | ||
86a77c38 ZYW |
416 | ssize_t qemu_deliver_packet_iov(NetClientState *sender, |
417 | unsigned flags, | |
418 | const struct iovec *iov, | |
419 | int iovcnt, | |
420 | void *opaque) | |
9a6ecb30 | 421 | { |
35277d14 | 422 | NetClientState *nc = opaque; |
c67f5dc1 | 423 | int ret; |
9a6ecb30 | 424 | |
35277d14 | 425 | if (nc->link_down) { |
ce053661 | 426 | return iov_size(iov, iovcnt); |
9a6ecb30 MM |
427 | } |
428 | ||
c67f5dc1 SH |
429 | if (nc->receive_disabled) { |
430 | return 0; | |
431 | } | |
432 | ||
35277d14 | 433 | if (nc->info->receive_iov) { |
c67f5dc1 | 434 | ret = nc->info->receive_iov(nc, iov, iovcnt); |
9a6ecb30 | 435 | } else { |
c67f5dc1 SH |
436 | ret = nc_sendv_compat(nc, iov, iovcnt); |
437 | } | |
438 | ||
439 | if (ret == 0) { | |
440 | nc->receive_disabled = 1; | |
e94667b9 | 441 | } |
c67f5dc1 SH |
442 | |
443 | return ret; | |
e94667b9 MM |
444 | } |
445 | ||
4e68f7a0 | 446 | ssize_t qemu_sendv_packet_async(NetClientState *sender, |
f3b6c7fc MM |
447 | const struct iovec *iov, int iovcnt, |
448 | NetPacketSent *sent_cb) | |
e94667b9 | 449 | { |
9a6ecb30 MM |
450 | NetQueue *queue; |
451 | ||
a005d073 | 452 | if (sender->link_down || !sender->peer) { |
ce053661 | 453 | return iov_size(iov, iovcnt); |
e94667b9 MM |
454 | } |
455 | ||
a005d073 | 456 | queue = sender->peer->send_queue; |
9a6ecb30 | 457 | |
c0b8e49c MM |
458 | return qemu_net_queue_send_iov(queue, sender, |
459 | QEMU_NET_PACKET_FLAG_NONE, | |
460 | iov, iovcnt, sent_cb); | |
fbe78f4f AL |
461 | } |
462 | ||
f3b6c7fc | 463 | ssize_t |
35277d14 | 464 | qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt) |
f3b6c7fc | 465 | { |
35277d14 | 466 | return qemu_sendv_packet_async(nc, iov, iovcnt, NULL); |
63a01ef8 AL |
467 | } |
468 | ||
4e68f7a0 | 469 | NetClientState *qemu_find_netdev(const char *id) |
5869c4d5 | 470 | { |
35277d14 | 471 | NetClientState *nc; |
5869c4d5 | 472 | |
35277d14 SH |
473 | QTAILQ_FOREACH(nc, &net_clients, next) { |
474 | if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) | |
85dde9a9 | 475 | continue; |
35277d14 SH |
476 | if (!strcmp(nc->name, id)) { |
477 | return nc; | |
5869c4d5 MM |
478 | } |
479 | } | |
480 | ||
481 | return NULL; | |
482 | } | |
483 | ||
7697079b AL |
484 | static int nic_get_free_idx(void) |
485 | { | |
486 | int index; | |
487 | ||
488 | for (index = 0; index < MAX_NICS; index++) | |
489 | if (!nd_table[index].used) | |
490 | return index; | |
491 | return -1; | |
492 | } | |
493 | ||
07caea31 MA |
494 | int qemu_show_nic_models(const char *arg, const char *const *models) |
495 | { | |
496 | int i; | |
497 | ||
c8057f95 | 498 | if (!arg || !is_help_option(arg)) { |
07caea31 | 499 | return 0; |
c8057f95 | 500 | } |
07caea31 MA |
501 | |
502 | fprintf(stderr, "qemu: Supported NIC models: "); | |
503 | for (i = 0 ; models[i]; i++) | |
504 | fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n'); | |
505 | return 1; | |
506 | } | |
507 | ||
d07f22c5 AL |
508 | void qemu_check_nic_model(NICInfo *nd, const char *model) |
509 | { | |
510 | const char *models[2]; | |
511 | ||
512 | models[0] = model; | |
513 | models[1] = NULL; | |
514 | ||
07caea31 MA |
515 | if (qemu_show_nic_models(nd->model, models)) |
516 | exit(0); | |
517 | if (qemu_find_nic_model(nd, models, model) < 0) | |
518 | exit(1); | |
d07f22c5 AL |
519 | } |
520 | ||
07caea31 MA |
521 | int qemu_find_nic_model(NICInfo *nd, const char * const *models, |
522 | const char *default_model) | |
d07f22c5 | 523 | { |
07caea31 | 524 | int i; |
d07f22c5 AL |
525 | |
526 | if (!nd->model) | |
7267c094 | 527 | nd->model = g_strdup(default_model); |
d07f22c5 | 528 | |
07caea31 MA |
529 | for (i = 0 ; models[i]; i++) { |
530 | if (strcmp(nd->model, models[i]) == 0) | |
531 | return i; | |
d07f22c5 AL |
532 | } |
533 | ||
6daf194d | 534 | error_report("Unsupported NIC model: %s", nd->model); |
07caea31 | 535 | return -1; |
d07f22c5 AL |
536 | } |
537 | ||
1a0c0958 | 538 | static int net_init_nic(const NetClientOptions *opts, const char *name, |
4e68f7a0 | 539 | NetClientState *peer) |
f83c6e10 MM |
540 | { |
541 | int idx; | |
542 | NICInfo *nd; | |
2456f36f LE |
543 | const NetLegacyNicOptions *nic; |
544 | ||
545 | assert(opts->kind == NET_CLIENT_OPTIONS_KIND_NIC); | |
546 | nic = opts->nic; | |
f83c6e10 MM |
547 | |
548 | idx = nic_get_free_idx(); | |
549 | if (idx == -1 || nb_nics >= MAX_NICS) { | |
1ecda02b | 550 | error_report("Too Many NICs"); |
f83c6e10 MM |
551 | return -1; |
552 | } | |
553 | ||
554 | nd = &nd_table[idx]; | |
555 | ||
556 | memset(nd, 0, sizeof(*nd)); | |
557 | ||
2456f36f LE |
558 | if (nic->has_netdev) { |
559 | nd->netdev = qemu_find_netdev(nic->netdev); | |
5869c4d5 | 560 | if (!nd->netdev) { |
2456f36f | 561 | error_report("netdev '%s' not found", nic->netdev); |
5869c4d5 MM |
562 | return -1; |
563 | } | |
564 | } else { | |
d33d93b2 SH |
565 | assert(peer); |
566 | nd->netdev = peer; | |
5869c4d5 | 567 | } |
6d952ebe | 568 | if (name) { |
7267c094 | 569 | nd->name = g_strdup(name); |
6d952ebe | 570 | } |
2456f36f LE |
571 | if (nic->has_model) { |
572 | nd->model = g_strdup(nic->model); | |
f83c6e10 | 573 | } |
2456f36f LE |
574 | if (nic->has_addr) { |
575 | nd->devaddr = g_strdup(nic->addr); | |
f83c6e10 MM |
576 | } |
577 | ||
2456f36f LE |
578 | if (nic->has_macaddr && |
579 | net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) { | |
1ecda02b | 580 | error_report("invalid syntax for ethernet address"); |
f83c6e10 MM |
581 | return -1; |
582 | } | |
6eed1856 | 583 | qemu_macaddr_default_if_unset(&nd->macaddr); |
f83c6e10 | 584 | |
2456f36f LE |
585 | if (nic->has_vectors) { |
586 | if (nic->vectors > 0x7ffffff) { | |
587 | error_report("invalid # of vectors: %"PRIu32, nic->vectors); | |
588 | return -1; | |
589 | } | |
590 | nd->nvectors = nic->vectors; | |
591 | } else { | |
592 | nd->nvectors = DEV_NVECTORS_UNSPECIFIED; | |
f83c6e10 MM |
593 | } |
594 | ||
595 | nd->used = 1; | |
f83c6e10 MM |
596 | nb_nics++; |
597 | ||
598 | return idx; | |
599 | } | |
600 | ||
6687b79d LE |
601 | |
602 | static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])( | |
1a0c0958 | 603 | const NetClientOptions *opts, |
6687b79d | 604 | const char *name, |
4e68f7a0 | 605 | NetClientState *peer) = { |
f6c874e3 | 606 | [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic, |
ec302ffd | 607 | #ifdef CONFIG_SLIRP |
f6c874e3 | 608 | [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp, |
2944e4ec | 609 | #endif |
f6c874e3 SH |
610 | [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap, |
611 | [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket, | |
dd51058d | 612 | #ifdef CONFIG_VDE |
f6c874e3 | 613 | [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde, |
dd51058d | 614 | #endif |
f6c874e3 | 615 | [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump, |
2944e4ec | 616 | #ifdef CONFIG_NET_BRIDGE |
f6c874e3 | 617 | [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge, |
6687b79d | 618 | #endif |
f6c874e3 | 619 | [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport, |
f83c6e10 MM |
620 | }; |
621 | ||
6687b79d | 622 | |
1a0c0958 | 623 | static int net_client_init1(const void *object, int is_netdev, Error **errp) |
f83c6e10 | 624 | { |
6687b79d LE |
625 | union { |
626 | const Netdev *netdev; | |
627 | const NetLegacy *net; | |
628 | } u; | |
629 | const NetClientOptions *opts; | |
6d952ebe | 630 | const char *name; |
f83c6e10 | 631 | |
5294e2c7 | 632 | if (is_netdev) { |
6687b79d LE |
633 | u.netdev = object; |
634 | opts = u.netdev->opts; | |
635 | name = u.netdev->id; | |
636 | ||
637 | switch (opts->kind) { | |
f6b134ac | 638 | #ifdef CONFIG_SLIRP |
6687b79d | 639 | case NET_CLIENT_OPTIONS_KIND_USER: |
f6b134ac | 640 | #endif |
6687b79d LE |
641 | case NET_CLIENT_OPTIONS_KIND_TAP: |
642 | case NET_CLIENT_OPTIONS_KIND_SOCKET: | |
f6b134ac | 643 | #ifdef CONFIG_VDE |
6687b79d LE |
644 | case NET_CLIENT_OPTIONS_KIND_VDE: |
645 | #endif | |
646 | #ifdef CONFIG_NET_BRIDGE | |
647 | case NET_CLIENT_OPTIONS_KIND_BRIDGE: | |
f6b134ac | 648 | #endif |
f6c874e3 | 649 | case NET_CLIENT_OPTIONS_KIND_HUBPORT: |
6687b79d LE |
650 | break; |
651 | ||
652 | default: | |
4559a1db LC |
653 | error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type", |
654 | "a netdev backend type"); | |
f6b134ac MM |
655 | return -1; |
656 | } | |
6687b79d LE |
657 | } else { |
658 | u.net = object; | |
659 | opts = u.net->opts; | |
660 | /* missing optional values have been initialized to "all bits zero" */ | |
661 | name = u.net->has_id ? u.net->id : u.net->name; | |
662 | } | |
f6b134ac | 663 | |
6687b79d | 664 | if (net_client_init_fun[opts->kind]) { |
4e68f7a0 | 665 | NetClientState *peer = NULL; |
6687b79d LE |
666 | |
667 | /* Do not add to a vlan if it's a -netdev or a nic with a netdev= | |
668 | * parameter. */ | |
669 | if (!is_netdev && | |
670 | (opts->kind != NET_CLIENT_OPTIONS_KIND_NIC || | |
671 | !opts->nic->has_netdev)) { | |
d33d93b2 | 672 | peer = net_hub_add_port(u.net->has_vlan ? u.net->vlan : 0, NULL); |
f6b134ac | 673 | } |
6687b79d | 674 | |
d33d93b2 | 675 | if (net_client_init_fun[opts->kind](opts, name, peer) < 0) { |
6687b79d LE |
676 | /* TODO push error reporting into init() methods */ |
677 | error_set(errp, QERR_DEVICE_INIT_FAILED, | |
678 | NetClientOptionsKind_lookup[opts->kind]); | |
f6b134ac MM |
679 | return -1; |
680 | } | |
681 | } | |
6687b79d LE |
682 | return 0; |
683 | } | |
684 | ||
f6b134ac | 685 | |
6687b79d LE |
686 | static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp) |
687 | { | |
688 | if (is_netdev) { | |
689 | visit_type_Netdev(v, (Netdev **)object, NULL, errp); | |
690 | } else { | |
691 | visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp); | |
6d952ebe | 692 | } |
6687b79d | 693 | } |
6d952ebe | 694 | |
f6b134ac | 695 | |
6687b79d LE |
696 | int net_client_init(QemuOpts *opts, int is_netdev, Error **errp) |
697 | { | |
698 | void *object = NULL; | |
699 | Error *err = NULL; | |
700 | int ret = -1; | |
f83c6e10 | 701 | |
6687b79d LE |
702 | { |
703 | OptsVisitor *ov = opts_visitor_new(opts); | |
f6b134ac | 704 | |
6687b79d LE |
705 | net_visit(opts_get_visitor(ov), is_netdev, &object, &err); |
706 | opts_visitor_cleanup(ov); | |
f83c6e10 MM |
707 | } |
708 | ||
6687b79d | 709 | if (!err) { |
1a0c0958 | 710 | ret = net_client_init1(object, is_netdev, &err); |
6687b79d LE |
711 | } |
712 | ||
713 | if (object) { | |
714 | QapiDeallocVisitor *dv = qapi_dealloc_visitor_new(); | |
715 | ||
716 | net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL); | |
717 | qapi_dealloc_visitor_cleanup(dv); | |
718 | } | |
719 | ||
720 | error_propagate(errp, err); | |
721 | return ret; | |
f83c6e10 MM |
722 | } |
723 | ||
6687b79d | 724 | |
6f338c34 AL |
725 | static int net_host_check_device(const char *device) |
726 | { | |
727 | int i; | |
bb9ea79e | 728 | const char *valid_param_list[] = { "tap", "socket", "dump" |
2944e4ec SW |
729 | #ifdef CONFIG_NET_BRIDGE |
730 | , "bridge" | |
731 | #endif | |
6f338c34 AL |
732 | #ifdef CONFIG_SLIRP |
733 | ,"user" | |
734 | #endif | |
735 | #ifdef CONFIG_VDE | |
736 | ,"vde" | |
737 | #endif | |
738 | }; | |
739 | for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) { | |
740 | if (!strncmp(valid_param_list[i], device, | |
741 | strlen(valid_param_list[i]))) | |
742 | return 1; | |
743 | } | |
744 | ||
745 | return 0; | |
746 | } | |
747 | ||
f18c16de | 748 | void net_host_device_add(Monitor *mon, const QDict *qdict) |
6f338c34 | 749 | { |
f18c16de | 750 | const char *device = qdict_get_str(qdict, "device"); |
7f1c9d20 | 751 | const char *opts_str = qdict_get_try_str(qdict, "opts"); |
4559a1db | 752 | Error *local_err = NULL; |
7f1c9d20 | 753 | QemuOpts *opts; |
f18c16de | 754 | |
6f338c34 | 755 | if (!net_host_check_device(device)) { |
376253ec | 756 | monitor_printf(mon, "invalid host network device %s\n", device); |
6f338c34 AL |
757 | return; |
758 | } | |
7f1c9d20 | 759 | |
3329f07b | 760 | opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0); |
7f1c9d20 | 761 | if (!opts) { |
7f1c9d20 MM |
762 | return; |
763 | } | |
764 | ||
765 | qemu_opt_set(opts, "type", device); | |
766 | ||
4559a1db LC |
767 | net_client_init(opts, 0, &local_err); |
768 | if (error_is_set(&local_err)) { | |
769 | qerror_report_err(local_err); | |
770 | error_free(local_err); | |
5c8be678 AL |
771 | monitor_printf(mon, "adding host network device %s failed\n", device); |
772 | } | |
6f338c34 AL |
773 | } |
774 | ||
f18c16de | 775 | void net_host_device_remove(Monitor *mon, const QDict *qdict) |
6f338c34 | 776 | { |
35277d14 | 777 | NetClientState *nc; |
f18c16de LC |
778 | int vlan_id = qdict_get_int(qdict, "vlan_id"); |
779 | const char *device = qdict_get_str(qdict, "device"); | |
6f338c34 | 780 | |
35277d14 SH |
781 | nc = net_hub_find_client_by_name(vlan_id, device); |
782 | if (!nc) { | |
6f338c34 AL |
783 | return; |
784 | } | |
35277d14 | 785 | if (!net_host_check_device(nc->model)) { |
e8f1f9db AL |
786 | monitor_printf(mon, "invalid host network device %s\n", device); |
787 | return; | |
788 | } | |
b20c6b9e | 789 | qemu_del_net_client(nc); |
6f338c34 AL |
790 | } |
791 | ||
928059a3 LC |
792 | void netdev_add(QemuOpts *opts, Error **errp) |
793 | { | |
794 | net_client_init(opts, 1, errp); | |
795 | } | |
796 | ||
797 | int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret) | |
ae82d324 | 798 | { |
4e89978e | 799 | Error *local_err = NULL; |
928059a3 | 800 | QemuOptsList *opts_list; |
ae82d324 | 801 | QemuOpts *opts; |
ae82d324 | 802 | |
928059a3 LC |
803 | opts_list = qemu_find_opts_err("netdev", &local_err); |
804 | if (error_is_set(&local_err)) { | |
805 | goto exit_err; | |
ae82d324 MA |
806 | } |
807 | ||
928059a3 LC |
808 | opts = qemu_opts_from_qdict(opts_list, qdict, &local_err); |
809 | if (error_is_set(&local_err)) { | |
810 | goto exit_err; | |
811 | } | |
812 | ||
813 | netdev_add(opts, &local_err); | |
814 | if (error_is_set(&local_err)) { | |
410cbafe | 815 | qemu_opts_del(opts); |
928059a3 | 816 | goto exit_err; |
410cbafe YT |
817 | } |
818 | ||
928059a3 LC |
819 | return 0; |
820 | ||
821 | exit_err: | |
822 | qerror_report_err(local_err); | |
823 | error_free(local_err); | |
824 | return -1; | |
ae82d324 MA |
825 | } |
826 | ||
5f964155 | 827 | void qmp_netdev_del(const char *id, Error **errp) |
ae82d324 | 828 | { |
35277d14 | 829 | NetClientState *nc; |
ae82d324 | 830 | |
35277d14 SH |
831 | nc = qemu_find_netdev(id); |
832 | if (!nc) { | |
5f964155 LC |
833 | error_set(errp, QERR_DEVICE_NOT_FOUND, id); |
834 | return; | |
ae82d324 | 835 | } |
5f964155 | 836 | |
b20c6b9e | 837 | qemu_del_net_client(nc); |
5f964155 | 838 | qemu_opts_del(qemu_opts_find(qemu_find_opts_err("netdev", errp), id)); |
ae82d324 MA |
839 | } |
840 | ||
1a859593 | 841 | void print_net_client(Monitor *mon, NetClientState *nc) |
44e798d3 | 842 | { |
35277d14 SH |
843 | monitor_printf(mon, "%s: type=%s,%s\n", nc->name, |
844 | NetClientOptionsKind_lookup[nc->info->type], nc->info_str); | |
44e798d3 JK |
845 | } |
846 | ||
376253ec | 847 | void do_info_network(Monitor *mon) |
63a01ef8 | 848 | { |
35277d14 | 849 | NetClientState *nc, *peer; |
2be64a68 | 850 | NetClientOptionsKind type; |
63a01ef8 | 851 | |
1a859593 ZYW |
852 | net_hub_info(mon); |
853 | ||
35277d14 SH |
854 | QTAILQ_FOREACH(nc, &net_clients, next) { |
855 | peer = nc->peer; | |
856 | type = nc->info->type; | |
5610c3aa | 857 | |
1a859593 ZYW |
858 | /* Skip if already printed in hub info */ |
859 | if (net_hub_id_for_client(nc, NULL) == 0) { | |
860 | continue; | |
5610c3aa | 861 | } |
1a859593 | 862 | |
2be64a68 | 863 | if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) { |
35277d14 | 864 | print_net_client(mon, nc); |
19061e63 | 865 | } /* else it's a netdev connected to a NIC, printed with the NIC */ |
2be64a68 | 866 | if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) { |
1a859593 | 867 | monitor_printf(mon, " \\ "); |
44e798d3 | 868 | print_net_client(mon, peer); |
a0104e0e | 869 | } |
a0104e0e | 870 | } |
63a01ef8 AL |
871 | } |
872 | ||
4b37156c | 873 | void qmp_set_link(const char *name, bool up, Error **errp) |
436e5e53 | 874 | { |
35277d14 | 875 | NetClientState *nc = NULL; |
436e5e53 | 876 | |
35277d14 SH |
877 | QTAILQ_FOREACH(nc, &net_clients, next) { |
878 | if (!strcmp(nc->name, name)) { | |
85dde9a9 MA |
879 | goto done; |
880 | } | |
881 | } | |
dd5de373 | 882 | done: |
35277d14 | 883 | if (!nc) { |
4b37156c LC |
884 | error_set(errp, QERR_DEVICE_NOT_FOUND, name); |
885 | return; | |
436e5e53 AL |
886 | } |
887 | ||
35277d14 | 888 | nc->link_down = !up; |
436e5e53 | 889 | |
35277d14 SH |
890 | if (nc->info->link_status_changed) { |
891 | nc->info->link_status_changed(nc); | |
665a3b07 | 892 | } |
ab1cbe1c MT |
893 | |
894 | /* Notify peer. Don't update peer link status: this makes it possible to | |
895 | * disconnect from host network without notifying the guest. | |
896 | * FIXME: is disconnected link status change operation useful? | |
897 | * | |
898 | * Current behaviour is compatible with qemu vlans where there could be | |
899 | * multiple clients that can still communicate with each other in | |
900 | * disconnected mode. For now maintain this compatibility. */ | |
35277d14 SH |
901 | if (nc->peer && nc->peer->info->link_status_changed) { |
902 | nc->peer->info->link_status_changed(nc->peer); | |
ab1cbe1c | 903 | } |
436e5e53 AL |
904 | } |
905 | ||
63a01ef8 AL |
906 | void net_cleanup(void) |
907 | { | |
35277d14 | 908 | NetClientState *nc, *next_vc; |
577c4af9 | 909 | |
35277d14 | 910 | QTAILQ_FOREACH_SAFE(nc, &net_clients, next, next_vc) { |
b20c6b9e | 911 | qemu_del_net_client(nc); |
577c4af9 | 912 | } |
63a01ef8 AL |
913 | } |
914 | ||
668680f7 | 915 | void net_check_clients(void) |
63a01ef8 | 916 | { |
35277d14 | 917 | NetClientState *nc; |
48e2faf2 | 918 | int i; |
63a01ef8 | 919 | |
641f6eae PM |
920 | /* Don't warn about the default network setup that you get if |
921 | * no command line -net or -netdev options are specified. There | |
922 | * are two cases that we would otherwise complain about: | |
923 | * (1) board doesn't support a NIC but the implicit "-net nic" | |
924 | * requested one | |
925 | * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic" | |
926 | * sets up a nic that isn't connected to anything. | |
927 | */ | |
928 | if (default_net) { | |
929 | return; | |
930 | } | |
931 | ||
81017645 | 932 | net_hub_check_clients(); |
ac60cc18 | 933 | |
35277d14 SH |
934 | QTAILQ_FOREACH(nc, &net_clients, next) { |
935 | if (!nc->peer) { | |
efe32fdd | 936 | fprintf(stderr, "Warning: %s %s has no peer\n", |
35277d14 SH |
937 | nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ? |
938 | "nic" : "netdev", nc->name); | |
efe32fdd MA |
939 | } |
940 | } | |
48e2faf2 PM |
941 | |
942 | /* Check that all NICs requested via -net nic actually got created. | |
943 | * NICs created via -device don't need to be checked here because | |
944 | * they are always instantiated. | |
945 | */ | |
946 | for (i = 0; i < MAX_NICS; i++) { | |
947 | NICInfo *nd = &nd_table[i]; | |
948 | if (nd->used && !nd->instantiated) { | |
949 | fprintf(stderr, "Warning: requested NIC (%s, model %s) " | |
950 | "was not created (not supported by this machine?)\n", | |
951 | nd->name ? nd->name : "anonymous", | |
952 | nd->model ? nd->model : "unspecified"); | |
953 | } | |
954 | } | |
63a01ef8 | 955 | } |
dc1c9fe8 MM |
956 | |
957 | static int net_init_client(QemuOpts *opts, void *dummy) | |
958 | { | |
4559a1db LC |
959 | Error *local_err = NULL; |
960 | ||
961 | net_client_init(opts, 0, &local_err); | |
962 | if (error_is_set(&local_err)) { | |
963 | qerror_report_err(local_err); | |
964 | error_free(local_err); | |
c1671a08 | 965 | return -1; |
4559a1db LC |
966 | } |
967 | ||
c1671a08 | 968 | return 0; |
f6b134ac MM |
969 | } |
970 | ||
971 | static int net_init_netdev(QemuOpts *opts, void *dummy) | |
972 | { | |
4559a1db LC |
973 | Error *local_err = NULL; |
974 | int ret; | |
975 | ||
976 | ret = net_client_init(opts, 1, &local_err); | |
977 | if (error_is_set(&local_err)) { | |
978 | qerror_report_err(local_err); | |
979 | error_free(local_err); | |
980 | return -1; | |
981 | } | |
982 | ||
983 | return ret; | |
dc1c9fe8 MM |
984 | } |
985 | ||
986 | int net_init_clients(void) | |
987 | { | |
3329f07b GH |
988 | QemuOptsList *net = qemu_find_opts("net"); |
989 | ||
cb4522cc | 990 | if (default_net) { |
dc1c9fe8 | 991 | /* if no clients, we use a default config */ |
3329f07b | 992 | qemu_opts_set(net, NULL, "type", "nic"); |
dc1c9fe8 | 993 | #ifdef CONFIG_SLIRP |
3329f07b | 994 | qemu_opts_set(net, NULL, "type", "user"); |
dc1c9fe8 MM |
995 | #endif |
996 | } | |
997 | ||
94878994 | 998 | QTAILQ_INIT(&net_clients); |
5610c3aa | 999 | |
3329f07b | 1000 | if (qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL, 1) == -1) |
f6b134ac MM |
1001 | return -1; |
1002 | ||
3329f07b | 1003 | if (qemu_opts_foreach(net, net_init_client, NULL, 1) == -1) { |
dc1c9fe8 MM |
1004 | return -1; |
1005 | } | |
1006 | ||
dc1c9fe8 MM |
1007 | return 0; |
1008 | } | |
1009 | ||
7f161aae | 1010 | int net_client_parse(QemuOptsList *opts_list, const char *optarg) |
dc1c9fe8 | 1011 | { |
a3a766e7 | 1012 | #if defined(CONFIG_SLIRP) |
68ac40d2 MM |
1013 | int ret; |
1014 | if (net_slirp_parse_legacy(opts_list, optarg, &ret)) { | |
dc1c9fe8 MM |
1015 | return ret; |
1016 | } | |
a3a766e7 | 1017 | #endif |
68ac40d2 | 1018 | |
8212c64f | 1019 | if (!qemu_opts_parse(opts_list, optarg, 1)) { |
dc1c9fe8 MM |
1020 | return -1; |
1021 | } | |
1022 | ||
cb4522cc | 1023 | default_net = 0; |
dc1c9fe8 MM |
1024 | return 0; |
1025 | } | |
7fc8d918 JW |
1026 | |
1027 | /* From FreeBSD */ | |
1028 | /* XXX: optimize */ | |
1029 | unsigned compute_mcast_idx(const uint8_t *ep) | |
1030 | { | |
1031 | uint32_t crc; | |
1032 | int carry, i, j; | |
1033 | uint8_t b; | |
1034 | ||
1035 | crc = 0xffffffff; | |
1036 | for (i = 0; i < 6; i++) { | |
1037 | b = *ep++; | |
1038 | for (j = 0; j < 8; j++) { | |
1039 | carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01); | |
1040 | crc <<= 1; | |
1041 | b >>= 1; | |
1042 | if (carry) { | |
1043 | crc = ((crc ^ POLYNOMIAL) | carry); | |
1044 | } | |
1045 | } | |
1046 | } | |
1047 | return crc >> 26; | |
1048 | } |