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 "qemu/osdep.h" 25 26 #include "net/net.h" 27 #include "clients.h" 28 #include "hub.h" 29 #include "net/slirp.h" 30 #include "net/eth.h" 31 #include "util.h" 32 33 #include "monitor/monitor.h" 34 #include "qemu-common.h" 35 #include "qemu/help_option.h" 36 #include "qapi/qmp/qerror.h" 37 #include "qemu/error-report.h" 38 #include "qemu/sockets.h" 39 #include "qemu/cutils.h" 40 #include "qemu/config-file.h" 41 #include "qmp-commands.h" 42 #include "hw/qdev.h" 43 #include "qemu/iov.h" 44 #include "qemu/main-loop.h" 45 #include "qapi-visit.h" 46 #include "qapi/opts-visitor.h" 47 #include "sysemu/sysemu.h" 48 #include "net/filter.h" 49 #include "qapi/string-output-visitor.h" 50 51 /* Net bridge is currently not supported for W32. */ 52 #if !defined(_WIN32) 53 # define CONFIG_NET_BRIDGE 54 #endif 55 56 static VMChangeStateEntry *net_change_state_entry; 57 static QTAILQ_HEAD(, NetClientState) net_clients; 58 59 const char *host_net_devices[] = { 60 "tap", 61 "socket", 62 "dump", 63 #ifdef CONFIG_NET_BRIDGE 64 "bridge", 65 #endif 66 #ifdef CONFIG_NETMAP 67 "netmap", 68 #endif 69 #ifdef CONFIG_SLIRP 70 "user", 71 #endif 72 #ifdef CONFIG_VDE 73 "vde", 74 #endif 75 "vhost-user", 76 NULL, 77 }; 78 79 int default_net = 1; 80 81 /***********************************************************/ 82 /* network device redirectors */ 83 84 #if defined(DEBUG_NET) 85 static void hex_dump(FILE *f, const uint8_t *buf, int size) 86 { 87 int len, i, j, c; 88 89 for(i=0;i<size;i+=16) { 90 len = size - i; 91 if (len > 16) 92 len = 16; 93 fprintf(f, "%08x ", i); 94 for(j=0;j<16;j++) { 95 if (j < len) 96 fprintf(f, " %02x", buf[i+j]); 97 else 98 fprintf(f, " "); 99 } 100 fprintf(f, " "); 101 for(j=0;j<len;j++) { 102 c = buf[i+j]; 103 if (c < ' ' || c > '~') 104 c = '.'; 105 fprintf(f, "%c", c); 106 } 107 fprintf(f, "\n"); 108 } 109 } 110 #endif 111 112 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep) 113 { 114 const char *p, *p1; 115 int len; 116 p = *pp; 117 p1 = strchr(p, sep); 118 if (!p1) 119 return -1; 120 len = p1 - p; 121 p1++; 122 if (buf_size > 0) { 123 if (len > buf_size - 1) 124 len = buf_size - 1; 125 memcpy(buf, p, len); 126 buf[len] = '\0'; 127 } 128 *pp = p1; 129 return 0; 130 } 131 132 int parse_host_port(struct sockaddr_in *saddr, const char *str) 133 { 134 char buf[512]; 135 struct hostent *he; 136 const char *p, *r; 137 int port; 138 139 p = str; 140 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) 141 return -1; 142 saddr->sin_family = AF_INET; 143 if (buf[0] == '\0') { 144 saddr->sin_addr.s_addr = 0; 145 } else { 146 if (qemu_isdigit(buf[0])) { 147 if (!inet_aton(buf, &saddr->sin_addr)) 148 return -1; 149 } else { 150 if ((he = gethostbyname(buf)) == NULL) 151 return - 1; 152 saddr->sin_addr = *(struct in_addr *)he->h_addr; 153 } 154 } 155 port = strtol(p, (char **)&r, 0); 156 if (r == p) 157 return -1; 158 saddr->sin_port = htons(port); 159 return 0; 160 } 161 162 char *qemu_mac_strdup_printf(const uint8_t *macaddr) 163 { 164 return g_strdup_printf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x", 165 macaddr[0], macaddr[1], macaddr[2], 166 macaddr[3], macaddr[4], macaddr[5]); 167 } 168 169 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]) 170 { 171 snprintf(nc->info_str, sizeof(nc->info_str), 172 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x", 173 nc->model, 174 macaddr[0], macaddr[1], macaddr[2], 175 macaddr[3], macaddr[4], macaddr[5]); 176 } 177 178 static int mac_table[256] = {0}; 179 180 static void qemu_macaddr_set_used(MACAddr *macaddr) 181 { 182 int index; 183 184 for (index = 0x56; index < 0xFF; index++) { 185 if (macaddr->a[5] == index) { 186 mac_table[index]++; 187 } 188 } 189 } 190 191 static void qemu_macaddr_set_free(MACAddr *macaddr) 192 { 193 int index; 194 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } }; 195 196 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) { 197 return; 198 } 199 for (index = 0x56; index < 0xFF; index++) { 200 if (macaddr->a[5] == index) { 201 mac_table[index]--; 202 } 203 } 204 } 205 206 static int qemu_macaddr_get_free(void) 207 { 208 int index; 209 210 for (index = 0x56; index < 0xFF; index++) { 211 if (mac_table[index] == 0) { 212 return index; 213 } 214 } 215 216 return -1; 217 } 218 219 void qemu_macaddr_default_if_unset(MACAddr *macaddr) 220 { 221 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } }; 222 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } }; 223 224 if (memcmp(macaddr, &zero, sizeof(zero)) != 0) { 225 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) { 226 return; 227 } else { 228 qemu_macaddr_set_used(macaddr); 229 return; 230 } 231 } 232 233 macaddr->a[0] = 0x52; 234 macaddr->a[1] = 0x54; 235 macaddr->a[2] = 0x00; 236 macaddr->a[3] = 0x12; 237 macaddr->a[4] = 0x34; 238 macaddr->a[5] = qemu_macaddr_get_free(); 239 qemu_macaddr_set_used(macaddr); 240 } 241 242 /** 243 * Generate a name for net client 244 * 245 * Only net clients created with the legacy -net option and NICs need this. 246 */ 247 static char *assign_name(NetClientState *nc1, const char *model) 248 { 249 NetClientState *nc; 250 int id = 0; 251 252 QTAILQ_FOREACH(nc, &net_clients, next) { 253 if (nc == nc1) { 254 continue; 255 } 256 if (strcmp(nc->model, model) == 0) { 257 id++; 258 } 259 } 260 261 return g_strdup_printf("%s.%d", model, id); 262 } 263 264 static void qemu_net_client_destructor(NetClientState *nc) 265 { 266 g_free(nc); 267 } 268 269 static void qemu_net_client_setup(NetClientState *nc, 270 NetClientInfo *info, 271 NetClientState *peer, 272 const char *model, 273 const char *name, 274 NetClientDestructor *destructor) 275 { 276 nc->info = info; 277 nc->model = g_strdup(model); 278 if (name) { 279 nc->name = g_strdup(name); 280 } else { 281 nc->name = assign_name(nc, model); 282 } 283 284 if (peer) { 285 assert(!peer->peer); 286 nc->peer = peer; 287 peer->peer = nc; 288 } 289 QTAILQ_INSERT_TAIL(&net_clients, nc, next); 290 291 nc->incoming_queue = qemu_new_net_queue(qemu_deliver_packet_iov, nc); 292 nc->destructor = destructor; 293 QTAILQ_INIT(&nc->filters); 294 } 295 296 NetClientState *qemu_new_net_client(NetClientInfo *info, 297 NetClientState *peer, 298 const char *model, 299 const char *name) 300 { 301 NetClientState *nc; 302 303 assert(info->size >= sizeof(NetClientState)); 304 305 nc = g_malloc0(info->size); 306 qemu_net_client_setup(nc, info, peer, model, name, 307 qemu_net_client_destructor); 308 309 return nc; 310 } 311 312 NICState *qemu_new_nic(NetClientInfo *info, 313 NICConf *conf, 314 const char *model, 315 const char *name, 316 void *opaque) 317 { 318 NetClientState **peers = conf->peers.ncs; 319 NICState *nic; 320 int i, queues = MAX(1, conf->peers.queues); 321 322 assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC); 323 assert(info->size >= sizeof(NICState)); 324 325 nic = g_malloc0(info->size + sizeof(NetClientState) * queues); 326 nic->ncs = (void *)nic + info->size; 327 nic->conf = conf; 328 nic->opaque = opaque; 329 330 for (i = 0; i < queues; i++) { 331 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name, 332 NULL); 333 nic->ncs[i].queue_index = i; 334 } 335 336 return nic; 337 } 338 339 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index) 340 { 341 return nic->ncs + queue_index; 342 } 343 344 NetClientState *qemu_get_queue(NICState *nic) 345 { 346 return qemu_get_subqueue(nic, 0); 347 } 348 349 NICState *qemu_get_nic(NetClientState *nc) 350 { 351 NetClientState *nc0 = nc - nc->queue_index; 352 353 return (NICState *)((void *)nc0 - nc->info->size); 354 } 355 356 void *qemu_get_nic_opaque(NetClientState *nc) 357 { 358 NICState *nic = qemu_get_nic(nc); 359 360 return nic->opaque; 361 } 362 363 static void qemu_cleanup_net_client(NetClientState *nc) 364 { 365 QTAILQ_REMOVE(&net_clients, nc, next); 366 367 if (nc->info->cleanup) { 368 nc->info->cleanup(nc); 369 } 370 } 371 372 static void qemu_free_net_client(NetClientState *nc) 373 { 374 if (nc->incoming_queue) { 375 qemu_del_net_queue(nc->incoming_queue); 376 } 377 if (nc->peer) { 378 nc->peer->peer = NULL; 379 } 380 g_free(nc->name); 381 g_free(nc->model); 382 if (nc->destructor) { 383 nc->destructor(nc); 384 } 385 } 386 387 void qemu_del_net_client(NetClientState *nc) 388 { 389 NetClientState *ncs[MAX_QUEUE_NUM]; 390 int queues, i; 391 NetFilterState *nf, *next; 392 393 assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC); 394 395 /* If the NetClientState belongs to a multiqueue backend, we will change all 396 * other NetClientStates also. 397 */ 398 queues = qemu_find_net_clients_except(nc->name, ncs, 399 NET_CLIENT_OPTIONS_KIND_NIC, 400 MAX_QUEUE_NUM); 401 assert(queues != 0); 402 403 QTAILQ_FOREACH_SAFE(nf, &nc->filters, next, next) { 404 object_unparent(OBJECT(nf)); 405 } 406 407 /* If there is a peer NIC, delete and cleanup client, but do not free. */ 408 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 409 NICState *nic = qemu_get_nic(nc->peer); 410 if (nic->peer_deleted) { 411 return; 412 } 413 nic->peer_deleted = true; 414 415 for (i = 0; i < queues; i++) { 416 ncs[i]->peer->link_down = true; 417 } 418 419 if (nc->peer->info->link_status_changed) { 420 nc->peer->info->link_status_changed(nc->peer); 421 } 422 423 for (i = 0; i < queues; i++) { 424 qemu_cleanup_net_client(ncs[i]); 425 } 426 427 return; 428 } 429 430 for (i = 0; i < queues; i++) { 431 qemu_cleanup_net_client(ncs[i]); 432 qemu_free_net_client(ncs[i]); 433 } 434 } 435 436 void qemu_del_nic(NICState *nic) 437 { 438 int i, queues = MAX(nic->conf->peers.queues, 1); 439 440 qemu_macaddr_set_free(&nic->conf->macaddr); 441 442 /* If this is a peer NIC and peer has already been deleted, free it now. */ 443 if (nic->peer_deleted) { 444 for (i = 0; i < queues; i++) { 445 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer); 446 } 447 } 448 449 for (i = queues - 1; i >= 0; i--) { 450 NetClientState *nc = qemu_get_subqueue(nic, i); 451 452 qemu_cleanup_net_client(nc); 453 qemu_free_net_client(nc); 454 } 455 456 g_free(nic); 457 } 458 459 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque) 460 { 461 NetClientState *nc; 462 463 QTAILQ_FOREACH(nc, &net_clients, next) { 464 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 465 if (nc->queue_index == 0) { 466 func(qemu_get_nic(nc), opaque); 467 } 468 } 469 } 470 } 471 472 bool qemu_has_ufo(NetClientState *nc) 473 { 474 if (!nc || !nc->info->has_ufo) { 475 return false; 476 } 477 478 return nc->info->has_ufo(nc); 479 } 480 481 bool qemu_has_vnet_hdr(NetClientState *nc) 482 { 483 if (!nc || !nc->info->has_vnet_hdr) { 484 return false; 485 } 486 487 return nc->info->has_vnet_hdr(nc); 488 } 489 490 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len) 491 { 492 if (!nc || !nc->info->has_vnet_hdr_len) { 493 return false; 494 } 495 496 return nc->info->has_vnet_hdr_len(nc, len); 497 } 498 499 void qemu_using_vnet_hdr(NetClientState *nc, bool enable) 500 { 501 if (!nc || !nc->info->using_vnet_hdr) { 502 return; 503 } 504 505 nc->info->using_vnet_hdr(nc, enable); 506 } 507 508 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6, 509 int ecn, int ufo) 510 { 511 if (!nc || !nc->info->set_offload) { 512 return; 513 } 514 515 nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo); 516 } 517 518 void qemu_set_vnet_hdr_len(NetClientState *nc, int len) 519 { 520 if (!nc || !nc->info->set_vnet_hdr_len) { 521 return; 522 } 523 524 nc->info->set_vnet_hdr_len(nc, len); 525 } 526 527 int qemu_set_vnet_le(NetClientState *nc, bool is_le) 528 { 529 #ifdef HOST_WORDS_BIGENDIAN 530 if (!nc || !nc->info->set_vnet_le) { 531 return -ENOSYS; 532 } 533 534 return nc->info->set_vnet_le(nc, is_le); 535 #else 536 return 0; 537 #endif 538 } 539 540 int qemu_set_vnet_be(NetClientState *nc, bool is_be) 541 { 542 #ifdef HOST_WORDS_BIGENDIAN 543 return 0; 544 #else 545 if (!nc || !nc->info->set_vnet_be) { 546 return -ENOSYS; 547 } 548 549 return nc->info->set_vnet_be(nc, is_be); 550 #endif 551 } 552 553 int qemu_can_send_packet(NetClientState *sender) 554 { 555 int vm_running = runstate_is_running(); 556 557 if (!vm_running) { 558 return 0; 559 } 560 561 if (!sender->peer) { 562 return 1; 563 } 564 565 if (sender->peer->receive_disabled) { 566 return 0; 567 } else if (sender->peer->info->can_receive && 568 !sender->peer->info->can_receive(sender->peer)) { 569 return 0; 570 } 571 return 1; 572 } 573 574 static ssize_t filter_receive_iov(NetClientState *nc, 575 NetFilterDirection direction, 576 NetClientState *sender, 577 unsigned flags, 578 const struct iovec *iov, 579 int iovcnt, 580 NetPacketSent *sent_cb) 581 { 582 ssize_t ret = 0; 583 NetFilterState *nf = NULL; 584 585 if (direction == NET_FILTER_DIRECTION_TX) { 586 QTAILQ_FOREACH(nf, &nc->filters, next) { 587 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov, 588 iovcnt, sent_cb); 589 if (ret) { 590 return ret; 591 } 592 } 593 } else { 594 QTAILQ_FOREACH_REVERSE(nf, &nc->filters, NetFilterHead, next) { 595 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov, 596 iovcnt, sent_cb); 597 if (ret) { 598 return ret; 599 } 600 } 601 } 602 603 return ret; 604 } 605 606 static ssize_t filter_receive(NetClientState *nc, 607 NetFilterDirection direction, 608 NetClientState *sender, 609 unsigned flags, 610 const uint8_t *data, 611 size_t size, 612 NetPacketSent *sent_cb) 613 { 614 struct iovec iov = { 615 .iov_base = (void *)data, 616 .iov_len = size 617 }; 618 619 return filter_receive_iov(nc, direction, sender, flags, &iov, 1, sent_cb); 620 } 621 622 void qemu_purge_queued_packets(NetClientState *nc) 623 { 624 if (!nc->peer) { 625 return; 626 } 627 628 qemu_net_queue_purge(nc->peer->incoming_queue, nc); 629 } 630 631 static 632 void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge) 633 { 634 nc->receive_disabled = 0; 635 636 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) { 637 if (net_hub_flush(nc->peer)) { 638 qemu_notify_event(); 639 } 640 } 641 if (qemu_net_queue_flush(nc->incoming_queue)) { 642 /* We emptied the queue successfully, signal to the IO thread to repoll 643 * the file descriptor (for tap, for example). 644 */ 645 qemu_notify_event(); 646 } else if (purge) { 647 /* Unable to empty the queue, purge remaining packets */ 648 qemu_net_queue_purge(nc->incoming_queue, nc); 649 } 650 } 651 652 void qemu_flush_queued_packets(NetClientState *nc) 653 { 654 qemu_flush_or_purge_queued_packets(nc, false); 655 } 656 657 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender, 658 unsigned flags, 659 const uint8_t *buf, int size, 660 NetPacketSent *sent_cb) 661 { 662 NetQueue *queue; 663 int ret; 664 665 #ifdef DEBUG_NET 666 printf("qemu_send_packet_async:\n"); 667 hex_dump(stdout, buf, size); 668 #endif 669 670 if (sender->link_down || !sender->peer) { 671 return size; 672 } 673 674 /* Let filters handle the packet first */ 675 ret = filter_receive(sender, NET_FILTER_DIRECTION_TX, 676 sender, flags, buf, size, sent_cb); 677 if (ret) { 678 return ret; 679 } 680 681 ret = filter_receive(sender->peer, NET_FILTER_DIRECTION_RX, 682 sender, flags, buf, size, sent_cb); 683 if (ret) { 684 return ret; 685 } 686 687 queue = sender->peer->incoming_queue; 688 689 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb); 690 } 691 692 ssize_t qemu_send_packet_async(NetClientState *sender, 693 const uint8_t *buf, int size, 694 NetPacketSent *sent_cb) 695 { 696 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE, 697 buf, size, sent_cb); 698 } 699 700 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size) 701 { 702 qemu_send_packet_async(nc, buf, size, NULL); 703 } 704 705 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size) 706 { 707 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW, 708 buf, size, NULL); 709 } 710 711 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov, 712 int iovcnt, unsigned flags) 713 { 714 uint8_t buf[NET_BUFSIZE]; 715 uint8_t *buffer; 716 size_t offset; 717 718 if (iovcnt == 1) { 719 buffer = iov[0].iov_base; 720 offset = iov[0].iov_len; 721 } else { 722 buffer = buf; 723 offset = iov_to_buf(iov, iovcnt, 0, buf, sizeof(buf)); 724 } 725 726 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) { 727 return nc->info->receive_raw(nc, buffer, offset); 728 } else { 729 return nc->info->receive(nc, buffer, offset); 730 } 731 } 732 733 ssize_t qemu_deliver_packet_iov(NetClientState *sender, 734 unsigned flags, 735 const struct iovec *iov, 736 int iovcnt, 737 void *opaque) 738 { 739 NetClientState *nc = opaque; 740 int ret; 741 742 if (nc->link_down) { 743 return iov_size(iov, iovcnt); 744 } 745 746 if (nc->receive_disabled) { 747 return 0; 748 } 749 750 if (nc->info->receive_iov) { 751 ret = nc->info->receive_iov(nc, iov, iovcnt); 752 } else { 753 ret = nc_sendv_compat(nc, iov, iovcnt, flags); 754 } 755 756 if (ret == 0) { 757 nc->receive_disabled = 1; 758 } 759 760 return ret; 761 } 762 763 ssize_t qemu_sendv_packet_async(NetClientState *sender, 764 const struct iovec *iov, int iovcnt, 765 NetPacketSent *sent_cb) 766 { 767 NetQueue *queue; 768 int ret; 769 770 if (sender->link_down || !sender->peer) { 771 return iov_size(iov, iovcnt); 772 } 773 774 /* Let filters handle the packet first */ 775 ret = filter_receive_iov(sender, NET_FILTER_DIRECTION_TX, sender, 776 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb); 777 if (ret) { 778 return ret; 779 } 780 781 ret = filter_receive_iov(sender->peer, NET_FILTER_DIRECTION_RX, sender, 782 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb); 783 if (ret) { 784 return ret; 785 } 786 787 queue = sender->peer->incoming_queue; 788 789 return qemu_net_queue_send_iov(queue, sender, 790 QEMU_NET_PACKET_FLAG_NONE, 791 iov, iovcnt, sent_cb); 792 } 793 794 ssize_t 795 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt) 796 { 797 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL); 798 } 799 800 NetClientState *qemu_find_netdev(const char *id) 801 { 802 NetClientState *nc; 803 804 QTAILQ_FOREACH(nc, &net_clients, next) { 805 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) 806 continue; 807 if (!strcmp(nc->name, id)) { 808 return nc; 809 } 810 } 811 812 return NULL; 813 } 814 815 int qemu_find_net_clients_except(const char *id, NetClientState **ncs, 816 NetClientOptionsKind type, int max) 817 { 818 NetClientState *nc; 819 int ret = 0; 820 821 QTAILQ_FOREACH(nc, &net_clients, next) { 822 if (nc->info->type == type) { 823 continue; 824 } 825 if (!id || !strcmp(nc->name, id)) { 826 if (ret < max) { 827 ncs[ret] = nc; 828 } 829 ret++; 830 } 831 } 832 833 return ret; 834 } 835 836 static int nic_get_free_idx(void) 837 { 838 int index; 839 840 for (index = 0; index < MAX_NICS; index++) 841 if (!nd_table[index].used) 842 return index; 843 return -1; 844 } 845 846 int qemu_show_nic_models(const char *arg, const char *const *models) 847 { 848 int i; 849 850 if (!arg || !is_help_option(arg)) { 851 return 0; 852 } 853 854 fprintf(stderr, "qemu: Supported NIC models: "); 855 for (i = 0 ; models[i]; i++) 856 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n'); 857 return 1; 858 } 859 860 void qemu_check_nic_model(NICInfo *nd, const char *model) 861 { 862 const char *models[2]; 863 864 models[0] = model; 865 models[1] = NULL; 866 867 if (qemu_show_nic_models(nd->model, models)) 868 exit(0); 869 if (qemu_find_nic_model(nd, models, model) < 0) 870 exit(1); 871 } 872 873 int qemu_find_nic_model(NICInfo *nd, const char * const *models, 874 const char *default_model) 875 { 876 int i; 877 878 if (!nd->model) 879 nd->model = g_strdup(default_model); 880 881 for (i = 0 ; models[i]; i++) { 882 if (strcmp(nd->model, models[i]) == 0) 883 return i; 884 } 885 886 error_report("Unsupported NIC model: %s", nd->model); 887 return -1; 888 } 889 890 static int net_init_nic(const NetClientOptions *opts, const char *name, 891 NetClientState *peer, Error **errp) 892 { 893 int idx; 894 NICInfo *nd; 895 const NetLegacyNicOptions *nic; 896 897 assert(opts->type == NET_CLIENT_OPTIONS_KIND_NIC); 898 nic = opts->u.nic.data; 899 900 idx = nic_get_free_idx(); 901 if (idx == -1 || nb_nics >= MAX_NICS) { 902 error_setg(errp, "too many NICs"); 903 return -1; 904 } 905 906 nd = &nd_table[idx]; 907 908 memset(nd, 0, sizeof(*nd)); 909 910 if (nic->has_netdev) { 911 nd->netdev = qemu_find_netdev(nic->netdev); 912 if (!nd->netdev) { 913 error_setg(errp, "netdev '%s' not found", nic->netdev); 914 return -1; 915 } 916 } else { 917 assert(peer); 918 nd->netdev = peer; 919 } 920 nd->name = g_strdup(name); 921 if (nic->has_model) { 922 nd->model = g_strdup(nic->model); 923 } 924 if (nic->has_addr) { 925 nd->devaddr = g_strdup(nic->addr); 926 } 927 928 if (nic->has_macaddr && 929 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) { 930 error_setg(errp, "invalid syntax for ethernet address"); 931 return -1; 932 } 933 if (nic->has_macaddr && 934 is_multicast_ether_addr(nd->macaddr.a)) { 935 error_setg(errp, 936 "NIC cannot have multicast MAC address (odd 1st byte)"); 937 return -1; 938 } 939 qemu_macaddr_default_if_unset(&nd->macaddr); 940 941 if (nic->has_vectors) { 942 if (nic->vectors > 0x7ffffff) { 943 error_setg(errp, "invalid # of vectors: %"PRIu32, nic->vectors); 944 return -1; 945 } 946 nd->nvectors = nic->vectors; 947 } else { 948 nd->nvectors = DEV_NVECTORS_UNSPECIFIED; 949 } 950 951 nd->used = 1; 952 nb_nics++; 953 954 return idx; 955 } 956 957 958 static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND__MAX])( 959 const NetClientOptions *opts, 960 const char *name, 961 NetClientState *peer, Error **errp) = { 962 [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic, 963 #ifdef CONFIG_SLIRP 964 [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp, 965 #endif 966 [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap, 967 [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket, 968 #ifdef CONFIG_VDE 969 [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde, 970 #endif 971 #ifdef CONFIG_NETMAP 972 [NET_CLIENT_OPTIONS_KIND_NETMAP] = net_init_netmap, 973 #endif 974 [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump, 975 #ifdef CONFIG_NET_BRIDGE 976 [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge, 977 #endif 978 [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport, 979 #ifdef CONFIG_VHOST_NET_USED 980 [NET_CLIENT_OPTIONS_KIND_VHOST_USER] = net_init_vhost_user, 981 #endif 982 #ifdef CONFIG_L2TPV3 983 [NET_CLIENT_OPTIONS_KIND_L2TPV3] = net_init_l2tpv3, 984 #endif 985 }; 986 987 988 static int net_client_init1(const void *object, int is_netdev, Error **errp) 989 { 990 const NetClientOptions *opts; 991 const char *name; 992 NetClientState *peer = NULL; 993 994 if (is_netdev) { 995 const Netdev *netdev = object; 996 opts = netdev->opts; 997 name = netdev->id; 998 999 if (opts->type == NET_CLIENT_OPTIONS_KIND_DUMP || 1000 opts->type == NET_CLIENT_OPTIONS_KIND_NIC || 1001 !net_client_init_fun[opts->type]) { 1002 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type", 1003 "a netdev backend type"); 1004 return -1; 1005 } 1006 } else { 1007 const NetLegacy *net = object; 1008 opts = net->opts; 1009 /* missing optional values have been initialized to "all bits zero" */ 1010 name = net->has_id ? net->id : net->name; 1011 1012 if (opts->type == NET_CLIENT_OPTIONS_KIND_NONE) { 1013 return 0; /* nothing to do */ 1014 } 1015 if (opts->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) { 1016 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type", 1017 "a net type"); 1018 return -1; 1019 } 1020 1021 if (!net_client_init_fun[opts->type]) { 1022 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type", 1023 "a net backend type (maybe it is not compiled " 1024 "into this binary)"); 1025 return -1; 1026 } 1027 1028 /* Do not add to a vlan if it's a nic with a netdev= parameter. */ 1029 if (opts->type != NET_CLIENT_OPTIONS_KIND_NIC || 1030 !opts->u.nic.data->has_netdev) { 1031 peer = net_hub_add_port(net->has_vlan ? net->vlan : 0, NULL); 1032 } 1033 } 1034 1035 if (net_client_init_fun[opts->type](opts, name, peer, errp) < 0) { 1036 /* FIXME drop when all init functions store an Error */ 1037 if (errp && !*errp) { 1038 error_setg(errp, QERR_DEVICE_INIT_FAILED, 1039 NetClientOptionsKind_lookup[opts->type]); 1040 } 1041 return -1; 1042 } 1043 return 0; 1044 } 1045 1046 1047 int net_client_init(QemuOpts *opts, int is_netdev, Error **errp) 1048 { 1049 void *object = NULL; 1050 Error *err = NULL; 1051 int ret = -1; 1052 OptsVisitor *ov = opts_visitor_new(opts); 1053 Visitor *v = opts_get_visitor(ov); 1054 1055 { 1056 /* Parse convenience option format ip6-net=fec0::0[/64] */ 1057 const char *ip6_net = qemu_opt_get(opts, "ip6-net"); 1058 1059 if (ip6_net) { 1060 char buf[strlen(ip6_net) + 1]; 1061 1062 if (get_str_sep(buf, sizeof(buf), &ip6_net, '/') < 0) { 1063 /* Default 64bit prefix length. */ 1064 qemu_opt_set(opts, "ip6-prefix", ip6_net, &error_abort); 1065 qemu_opt_set_number(opts, "ip6-prefixlen", 64, &error_abort); 1066 } else { 1067 /* User-specified prefix length. */ 1068 unsigned long len; 1069 int err; 1070 1071 qemu_opt_set(opts, "ip6-prefix", buf, &error_abort); 1072 err = qemu_strtoul(ip6_net, NULL, 10, &len); 1073 1074 if (err) { 1075 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1076 "ip6-prefix", "a number"); 1077 } else { 1078 qemu_opt_set_number(opts, "ip6-prefixlen", len, 1079 &error_abort); 1080 } 1081 } 1082 qemu_opt_unset(opts, "ip6-net"); 1083 } 1084 } 1085 1086 if (is_netdev) { 1087 visit_type_Netdev(v, NULL, (Netdev **)&object, &err); 1088 } else { 1089 visit_type_NetLegacy(v, NULL, (NetLegacy **)&object, &err); 1090 } 1091 1092 if (!err) { 1093 ret = net_client_init1(object, is_netdev, &err); 1094 } 1095 1096 if (is_netdev) { 1097 qapi_free_Netdev(object); 1098 } else { 1099 qapi_free_NetLegacy(object); 1100 } 1101 1102 error_propagate(errp, err); 1103 return ret; 1104 } 1105 1106 1107 static int net_host_check_device(const char *device) 1108 { 1109 int i; 1110 for (i = 0; host_net_devices[i]; i++) { 1111 if (!strncmp(host_net_devices[i], device, 1112 strlen(host_net_devices[i]))) { 1113 return 1; 1114 } 1115 } 1116 1117 return 0; 1118 } 1119 1120 void hmp_host_net_add(Monitor *mon, const QDict *qdict) 1121 { 1122 const char *device = qdict_get_str(qdict, "device"); 1123 const char *opts_str = qdict_get_try_str(qdict, "opts"); 1124 Error *local_err = NULL; 1125 QemuOpts *opts; 1126 1127 if (!net_host_check_device(device)) { 1128 monitor_printf(mon, "invalid host network device %s\n", device); 1129 return; 1130 } 1131 1132 opts = qemu_opts_parse_noisily(qemu_find_opts("net"), 1133 opts_str ? opts_str : "", false); 1134 if (!opts) { 1135 return; 1136 } 1137 1138 qemu_opt_set(opts, "type", device, &error_abort); 1139 1140 net_client_init(opts, 0, &local_err); 1141 if (local_err) { 1142 error_report_err(local_err); 1143 monitor_printf(mon, "adding host network device %s failed\n", device); 1144 } 1145 } 1146 1147 void hmp_host_net_remove(Monitor *mon, const QDict *qdict) 1148 { 1149 NetClientState *nc; 1150 int vlan_id = qdict_get_int(qdict, "vlan_id"); 1151 const char *device = qdict_get_str(qdict, "device"); 1152 1153 nc = net_hub_find_client_by_name(vlan_id, device); 1154 if (!nc) { 1155 error_report("Host network device '%s' on hub '%d' not found", 1156 device, vlan_id); 1157 return; 1158 } 1159 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 1160 error_report("invalid host network device '%s'", device); 1161 return; 1162 } 1163 1164 qemu_del_net_client(nc->peer); 1165 qemu_del_net_client(nc); 1166 } 1167 1168 void netdev_add(QemuOpts *opts, Error **errp) 1169 { 1170 net_client_init(opts, 1, errp); 1171 } 1172 1173 void qmp_netdev_add(QDict *qdict, QObject **ret, Error **errp) 1174 { 1175 Error *local_err = NULL; 1176 QemuOptsList *opts_list; 1177 QemuOpts *opts; 1178 1179 opts_list = qemu_find_opts_err("netdev", &local_err); 1180 if (local_err) { 1181 goto out; 1182 } 1183 1184 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err); 1185 if (local_err) { 1186 goto out; 1187 } 1188 1189 netdev_add(opts, &local_err); 1190 if (local_err) { 1191 qemu_opts_del(opts); 1192 goto out; 1193 } 1194 1195 out: 1196 error_propagate(errp, local_err); 1197 } 1198 1199 void qmp_netdev_del(const char *id, Error **errp) 1200 { 1201 NetClientState *nc; 1202 QemuOpts *opts; 1203 1204 nc = qemu_find_netdev(id); 1205 if (!nc) { 1206 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1207 "Device '%s' not found", id); 1208 return; 1209 } 1210 1211 opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id); 1212 if (!opts) { 1213 error_setg(errp, "Device '%s' is not a netdev", id); 1214 return; 1215 } 1216 1217 qemu_del_net_client(nc); 1218 qemu_opts_del(opts); 1219 } 1220 1221 static void netfilter_print_info(Monitor *mon, NetFilterState *nf) 1222 { 1223 char *str; 1224 ObjectProperty *prop; 1225 ObjectPropertyIterator iter; 1226 StringOutputVisitor *ov; 1227 1228 /* generate info str */ 1229 object_property_iter_init(&iter, OBJECT(nf)); 1230 while ((prop = object_property_iter_next(&iter))) { 1231 if (!strcmp(prop->name, "type")) { 1232 continue; 1233 } 1234 ov = string_output_visitor_new(false); 1235 object_property_get(OBJECT(nf), string_output_get_visitor(ov), 1236 prop->name, NULL); 1237 str = string_output_get_string(ov); 1238 string_output_visitor_cleanup(ov); 1239 monitor_printf(mon, ",%s=%s", prop->name, str); 1240 g_free(str); 1241 } 1242 monitor_printf(mon, "\n"); 1243 } 1244 1245 void print_net_client(Monitor *mon, NetClientState *nc) 1246 { 1247 NetFilterState *nf; 1248 1249 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name, 1250 nc->queue_index, 1251 NetClientOptionsKind_lookup[nc->info->type], 1252 nc->info_str); 1253 if (!QTAILQ_EMPTY(&nc->filters)) { 1254 monitor_printf(mon, "filters:\n"); 1255 } 1256 QTAILQ_FOREACH(nf, &nc->filters, next) { 1257 char *path = object_get_canonical_path_component(OBJECT(nf)); 1258 1259 monitor_printf(mon, " - %s: type=%s", path, 1260 object_get_typename(OBJECT(nf))); 1261 netfilter_print_info(mon, nf); 1262 g_free(path); 1263 } 1264 } 1265 1266 RxFilterInfoList *qmp_query_rx_filter(bool has_name, const char *name, 1267 Error **errp) 1268 { 1269 NetClientState *nc; 1270 RxFilterInfoList *filter_list = NULL, *last_entry = NULL; 1271 1272 QTAILQ_FOREACH(nc, &net_clients, next) { 1273 RxFilterInfoList *entry; 1274 RxFilterInfo *info; 1275 1276 if (has_name && strcmp(nc->name, name) != 0) { 1277 continue; 1278 } 1279 1280 /* only query rx-filter information of NIC */ 1281 if (nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC) { 1282 if (has_name) { 1283 error_setg(errp, "net client(%s) isn't a NIC", name); 1284 return NULL; 1285 } 1286 continue; 1287 } 1288 1289 /* only query information on queue 0 since the info is per nic, 1290 * not per queue 1291 */ 1292 if (nc->queue_index != 0) 1293 continue; 1294 1295 if (nc->info->query_rx_filter) { 1296 info = nc->info->query_rx_filter(nc); 1297 entry = g_malloc0(sizeof(*entry)); 1298 entry->value = info; 1299 1300 if (!filter_list) { 1301 filter_list = entry; 1302 } else { 1303 last_entry->next = entry; 1304 } 1305 last_entry = entry; 1306 } else if (has_name) { 1307 error_setg(errp, "net client(%s) doesn't support" 1308 " rx-filter querying", name); 1309 return NULL; 1310 } 1311 1312 if (has_name) { 1313 break; 1314 } 1315 } 1316 1317 if (filter_list == NULL && has_name) { 1318 error_setg(errp, "invalid net client name: %s", name); 1319 } 1320 1321 return filter_list; 1322 } 1323 1324 void hmp_info_network(Monitor *mon, const QDict *qdict) 1325 { 1326 NetClientState *nc, *peer; 1327 NetClientOptionsKind type; 1328 1329 net_hub_info(mon); 1330 1331 QTAILQ_FOREACH(nc, &net_clients, next) { 1332 peer = nc->peer; 1333 type = nc->info->type; 1334 1335 /* Skip if already printed in hub info */ 1336 if (net_hub_id_for_client(nc, NULL) == 0) { 1337 continue; 1338 } 1339 1340 if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) { 1341 print_net_client(mon, nc); 1342 } /* else it's a netdev connected to a NIC, printed with the NIC */ 1343 if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) { 1344 monitor_printf(mon, " \\ "); 1345 print_net_client(mon, peer); 1346 } 1347 } 1348 } 1349 1350 void qmp_set_link(const char *name, bool up, Error **errp) 1351 { 1352 NetClientState *ncs[MAX_QUEUE_NUM]; 1353 NetClientState *nc; 1354 int queues, i; 1355 1356 queues = qemu_find_net_clients_except(name, ncs, 1357 NET_CLIENT_OPTIONS_KIND__MAX, 1358 MAX_QUEUE_NUM); 1359 1360 if (queues == 0) { 1361 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1362 "Device '%s' not found", name); 1363 return; 1364 } 1365 nc = ncs[0]; 1366 1367 for (i = 0; i < queues; i++) { 1368 ncs[i]->link_down = !up; 1369 } 1370 1371 if (nc->info->link_status_changed) { 1372 nc->info->link_status_changed(nc); 1373 } 1374 1375 if (nc->peer) { 1376 /* Change peer link only if the peer is NIC and then notify peer. 1377 * If the peer is a HUBPORT or a backend, we do not change the 1378 * link status. 1379 * 1380 * This behavior is compatible with qemu vlans where there could be 1381 * multiple clients that can still communicate with each other in 1382 * disconnected mode. For now maintain this compatibility. 1383 */ 1384 if (nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 1385 for (i = 0; i < queues; i++) { 1386 ncs[i]->peer->link_down = !up; 1387 } 1388 } 1389 if (nc->peer->info->link_status_changed) { 1390 nc->peer->info->link_status_changed(nc->peer); 1391 } 1392 } 1393 } 1394 1395 static void net_vm_change_state_handler(void *opaque, int running, 1396 RunState state) 1397 { 1398 NetClientState *nc; 1399 NetClientState *tmp; 1400 1401 QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) { 1402 if (running) { 1403 /* Flush queued packets and wake up backends. */ 1404 if (nc->peer && qemu_can_send_packet(nc)) { 1405 qemu_flush_queued_packets(nc->peer); 1406 } 1407 } else { 1408 /* Complete all queued packets, to guarantee we don't modify 1409 * state later when VM is not running. 1410 */ 1411 qemu_flush_or_purge_queued_packets(nc, true); 1412 } 1413 } 1414 } 1415 1416 void net_cleanup(void) 1417 { 1418 NetClientState *nc; 1419 1420 /* We may del multiple entries during qemu_del_net_client(), 1421 * so QTAILQ_FOREACH_SAFE() is also not safe here. 1422 */ 1423 while (!QTAILQ_EMPTY(&net_clients)) { 1424 nc = QTAILQ_FIRST(&net_clients); 1425 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 1426 qemu_del_nic(qemu_get_nic(nc)); 1427 } else { 1428 qemu_del_net_client(nc); 1429 } 1430 } 1431 1432 qemu_del_vm_change_state_handler(net_change_state_entry); 1433 } 1434 1435 void net_check_clients(void) 1436 { 1437 NetClientState *nc; 1438 int i; 1439 1440 /* Don't warn about the default network setup that you get if 1441 * no command line -net or -netdev options are specified. There 1442 * are two cases that we would otherwise complain about: 1443 * (1) board doesn't support a NIC but the implicit "-net nic" 1444 * requested one 1445 * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic" 1446 * sets up a nic that isn't connected to anything. 1447 */ 1448 if (default_net) { 1449 return; 1450 } 1451 1452 net_hub_check_clients(); 1453 1454 QTAILQ_FOREACH(nc, &net_clients, next) { 1455 if (!nc->peer) { 1456 fprintf(stderr, "Warning: %s %s has no peer\n", 1457 nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ? 1458 "nic" : "netdev", nc->name); 1459 } 1460 } 1461 1462 /* Check that all NICs requested via -net nic actually got created. 1463 * NICs created via -device don't need to be checked here because 1464 * they are always instantiated. 1465 */ 1466 for (i = 0; i < MAX_NICS; i++) { 1467 NICInfo *nd = &nd_table[i]; 1468 if (nd->used && !nd->instantiated) { 1469 fprintf(stderr, "Warning: requested NIC (%s, model %s) " 1470 "was not created (not supported by this machine?)\n", 1471 nd->name ? nd->name : "anonymous", 1472 nd->model ? nd->model : "unspecified"); 1473 } 1474 } 1475 } 1476 1477 static int net_init_client(void *dummy, QemuOpts *opts, Error **errp) 1478 { 1479 Error *local_err = NULL; 1480 1481 net_client_init(opts, 0, &local_err); 1482 if (local_err) { 1483 error_report_err(local_err); 1484 return -1; 1485 } 1486 1487 return 0; 1488 } 1489 1490 static int net_init_netdev(void *dummy, QemuOpts *opts, Error **errp) 1491 { 1492 Error *local_err = NULL; 1493 int ret; 1494 1495 ret = net_client_init(opts, 1, &local_err); 1496 if (local_err) { 1497 error_report_err(local_err); 1498 return -1; 1499 } 1500 1501 return ret; 1502 } 1503 1504 int net_init_clients(void) 1505 { 1506 QemuOptsList *net = qemu_find_opts("net"); 1507 1508 if (default_net) { 1509 /* if no clients, we use a default config */ 1510 qemu_opts_set(net, NULL, "type", "nic", &error_abort); 1511 #ifdef CONFIG_SLIRP 1512 qemu_opts_set(net, NULL, "type", "user", &error_abort); 1513 #endif 1514 } 1515 1516 net_change_state_entry = 1517 qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL); 1518 1519 QTAILQ_INIT(&net_clients); 1520 1521 if (qemu_opts_foreach(qemu_find_opts("netdev"), 1522 net_init_netdev, NULL, NULL)) { 1523 return -1; 1524 } 1525 1526 if (qemu_opts_foreach(net, net_init_client, NULL, NULL)) { 1527 return -1; 1528 } 1529 1530 return 0; 1531 } 1532 1533 int net_client_parse(QemuOptsList *opts_list, const char *optarg) 1534 { 1535 #if defined(CONFIG_SLIRP) 1536 int ret; 1537 if (net_slirp_parse_legacy(opts_list, optarg, &ret)) { 1538 return ret; 1539 } 1540 #endif 1541 1542 if (!qemu_opts_parse_noisily(opts_list, optarg, true)) { 1543 return -1; 1544 } 1545 1546 default_net = 0; 1547 return 0; 1548 } 1549 1550 /* From FreeBSD */ 1551 /* XXX: optimize */ 1552 unsigned compute_mcast_idx(const uint8_t *ep) 1553 { 1554 uint32_t crc; 1555 int carry, i, j; 1556 uint8_t b; 1557 1558 crc = 0xffffffff; 1559 for (i = 0; i < 6; i++) { 1560 b = *ep++; 1561 for (j = 0; j < 8; j++) { 1562 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01); 1563 crc <<= 1; 1564 b >>= 1; 1565 if (carry) { 1566 crc = ((crc ^ POLYNOMIAL) | carry); 1567 } 1568 } 1569 } 1570 return crc >> 26; 1571 } 1572 1573 QemuOptsList qemu_netdev_opts = { 1574 .name = "netdev", 1575 .implied_opt_name = "type", 1576 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head), 1577 .desc = { 1578 /* 1579 * no elements => accept any params 1580 * validation will happen later 1581 */ 1582 { /* end of list */ } 1583 }, 1584 }; 1585 1586 QemuOptsList qemu_net_opts = { 1587 .name = "net", 1588 .implied_opt_name = "type", 1589 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head), 1590 .desc = { 1591 /* 1592 * no elements => accept any params 1593 * validation will happen later 1594 */ 1595 { /* end of list */ } 1596 }, 1597 }; 1598