1 /* 2 * QEMU System Emulator 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 #include "config-host.h" 25 26 #include "net/net.h" 27 #include "clients.h" 28 #include "hub.h" 29 #include "net/slirp.h" 30 #include "util.h" 31 32 #include "monitor/monitor.h" 33 #include "qemu-common.h" 34 #include "qemu/sockets.h" 35 #include "qemu/config-file.h" 36 #include "qmp-commands.h" 37 #include "hw/qdev.h" 38 #include "qemu/iov.h" 39 #include "qapi-visit.h" 40 #include "qapi/opts-visitor.h" 41 #include "qapi/dealloc-visitor.h" 42 43 /* Net bridge is currently not supported for W32. */ 44 #if !defined(_WIN32) 45 # define CONFIG_NET_BRIDGE 46 #endif 47 48 static QTAILQ_HEAD(, NetClientState) net_clients; 49 50 int default_net = 1; 51 52 /***********************************************************/ 53 /* network device redirectors */ 54 55 #if defined(DEBUG_NET) 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 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 } 102 103 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 { 117 if (qemu_isdigit(buf[0])) { 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 } 132 133 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]) 134 { 135 snprintf(nc->info_str, sizeof(nc->info_str), 136 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x", 137 nc->model, 138 macaddr[0], macaddr[1], macaddr[2], 139 macaddr[3], macaddr[4], macaddr[5]); 140 } 141 142 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 } 156 157 /** 158 * Generate a name for net client 159 * 160 * Only net clients created with the legacy -net option and NICs need this. 161 */ 162 static char *assign_name(NetClientState *nc1, const char *model) 163 { 164 NetClientState *nc; 165 char buf[256]; 166 int id = 0; 167 168 QTAILQ_FOREACH(nc, &net_clients, next) { 169 if (nc == nc1) { 170 continue; 171 } 172 if (strcmp(nc->model, model) == 0) { 173 id++; 174 } 175 } 176 177 snprintf(buf, sizeof(buf), "%s.%d", model, id); 178 179 return g_strdup(buf); 180 } 181 182 static void qemu_net_client_destructor(NetClientState *nc) 183 { 184 g_free(nc); 185 } 186 187 static void qemu_net_client_setup(NetClientState *nc, 188 NetClientInfo *info, 189 NetClientState *peer, 190 const char *model, 191 const char *name, 192 NetClientDestructor *destructor) 193 { 194 nc->info = info; 195 nc->model = g_strdup(model); 196 if (name) { 197 nc->name = g_strdup(name); 198 } else { 199 nc->name = assign_name(nc, model); 200 } 201 202 if (peer) { 203 assert(!peer->peer); 204 nc->peer = peer; 205 peer->peer = nc; 206 } 207 QTAILQ_INSERT_TAIL(&net_clients, nc, next); 208 209 nc->send_queue = qemu_new_net_queue(nc); 210 nc->destructor = destructor; 211 } 212 213 NetClientState *qemu_new_net_client(NetClientInfo *info, 214 NetClientState *peer, 215 const char *model, 216 const char *name) 217 { 218 NetClientState *nc; 219 220 assert(info->size >= sizeof(NetClientState)); 221 222 nc = g_malloc0(info->size); 223 qemu_net_client_setup(nc, info, peer, model, name, 224 qemu_net_client_destructor); 225 226 return nc; 227 } 228 229 NICState *qemu_new_nic(NetClientInfo *info, 230 NICConf *conf, 231 const char *model, 232 const char *name, 233 void *opaque) 234 { 235 NetClientState **peers = conf->peers.ncs; 236 NICState *nic; 237 int i, queues = MAX(1, conf->queues); 238 239 assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC); 240 assert(info->size >= sizeof(NICState)); 241 242 nic = g_malloc0(info->size + sizeof(NetClientState) * queues); 243 nic->ncs = (void *)nic + info->size; 244 nic->conf = conf; 245 nic->opaque = opaque; 246 247 for (i = 0; i < queues; i++) { 248 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name, 249 NULL); 250 nic->ncs[i].queue_index = i; 251 } 252 253 return nic; 254 } 255 256 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index) 257 { 258 return nic->ncs + queue_index; 259 } 260 261 NetClientState *qemu_get_queue(NICState *nic) 262 { 263 return qemu_get_subqueue(nic, 0); 264 } 265 266 NICState *qemu_get_nic(NetClientState *nc) 267 { 268 NetClientState *nc0 = nc - nc->queue_index; 269 270 return (NICState *)((void *)nc0 - nc->info->size); 271 } 272 273 void *qemu_get_nic_opaque(NetClientState *nc) 274 { 275 NICState *nic = qemu_get_nic(nc); 276 277 return nic->opaque; 278 } 279 280 static void qemu_cleanup_net_client(NetClientState *nc) 281 { 282 QTAILQ_REMOVE(&net_clients, nc, next); 283 284 if (nc->info->cleanup) { 285 nc->info->cleanup(nc); 286 } 287 } 288 289 static void qemu_free_net_client(NetClientState *nc) 290 { 291 if (nc->send_queue) { 292 qemu_del_net_queue(nc->send_queue); 293 } 294 if (nc->peer) { 295 nc->peer->peer = NULL; 296 } 297 g_free(nc->name); 298 g_free(nc->model); 299 if (nc->destructor) { 300 nc->destructor(nc); 301 } 302 } 303 304 void qemu_del_net_client(NetClientState *nc) 305 { 306 NetClientState *ncs[MAX_QUEUE_NUM]; 307 int queues, i; 308 309 /* If the NetClientState belongs to a multiqueue backend, we will change all 310 * other NetClientStates also. 311 */ 312 queues = qemu_find_net_clients_except(nc->name, ncs, 313 NET_CLIENT_OPTIONS_KIND_NIC, 314 MAX_QUEUE_NUM); 315 assert(queues != 0); 316 317 /* If there is a peer NIC, delete and cleanup client, but do not free. */ 318 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 319 NICState *nic = qemu_get_nic(nc->peer); 320 if (nic->peer_deleted) { 321 return; 322 } 323 nic->peer_deleted = true; 324 325 for (i = 0; i < queues; i++) { 326 ncs[i]->peer->link_down = true; 327 } 328 329 if (nc->peer->info->link_status_changed) { 330 nc->peer->info->link_status_changed(nc->peer); 331 } 332 333 for (i = 0; i < queues; i++) { 334 qemu_cleanup_net_client(ncs[i]); 335 } 336 337 return; 338 } 339 340 assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC); 341 342 for (i = 0; i < queues; i++) { 343 qemu_cleanup_net_client(ncs[i]); 344 qemu_free_net_client(ncs[i]); 345 } 346 } 347 348 void qemu_del_nic(NICState *nic) 349 { 350 int i, queues = MAX(nic->conf->queues, 1); 351 352 /* If this is a peer NIC and peer has already been deleted, free it now. */ 353 if (nic->peer_deleted) { 354 for (i = 0; i < queues; i++) { 355 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer); 356 } 357 } 358 359 for (i = queues - 1; i >= 0; i--) { 360 NetClientState *nc = qemu_get_subqueue(nic, i); 361 362 qemu_cleanup_net_client(nc); 363 qemu_free_net_client(nc); 364 } 365 366 g_free(nic); 367 } 368 369 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque) 370 { 371 NetClientState *nc; 372 373 QTAILQ_FOREACH(nc, &net_clients, next) { 374 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 375 if (nc->queue_index == 0) { 376 func(qemu_get_nic(nc), opaque); 377 } 378 } 379 } 380 } 381 382 int qemu_can_send_packet(NetClientState *sender) 383 { 384 if (!sender->peer) { 385 return 1; 386 } 387 388 if (sender->peer->receive_disabled) { 389 return 0; 390 } else if (sender->peer->info->can_receive && 391 !sender->peer->info->can_receive(sender->peer)) { 392 return 0; 393 } 394 return 1; 395 } 396 397 ssize_t qemu_deliver_packet(NetClientState *sender, 398 unsigned flags, 399 const uint8_t *data, 400 size_t size, 401 void *opaque) 402 { 403 NetClientState *nc = opaque; 404 ssize_t ret; 405 406 if (nc->link_down) { 407 return size; 408 } 409 410 if (nc->receive_disabled) { 411 return 0; 412 } 413 414 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) { 415 ret = nc->info->receive_raw(nc, data, size); 416 } else { 417 ret = nc->info->receive(nc, data, size); 418 } 419 420 if (ret == 0) { 421 nc->receive_disabled = 1; 422 }; 423 424 return ret; 425 } 426 427 void qemu_purge_queued_packets(NetClientState *nc) 428 { 429 if (!nc->peer) { 430 return; 431 } 432 433 qemu_net_queue_purge(nc->peer->send_queue, nc); 434 } 435 436 void qemu_flush_queued_packets(NetClientState *nc) 437 { 438 nc->receive_disabled = 0; 439 440 if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) { 441 if (net_hub_flush(nc->peer)) { 442 qemu_notify_event(); 443 } 444 return; 445 } 446 if (qemu_net_queue_flush(nc->send_queue)) { 447 /* We emptied the queue successfully, signal to the IO thread to repoll 448 * the file descriptor (for tap, for example). 449 */ 450 qemu_notify_event(); 451 } 452 } 453 454 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender, 455 unsigned flags, 456 const uint8_t *buf, int size, 457 NetPacketSent *sent_cb) 458 { 459 NetQueue *queue; 460 461 #ifdef DEBUG_NET 462 printf("qemu_send_packet_async:\n"); 463 hex_dump(stdout, buf, size); 464 #endif 465 466 if (sender->link_down || !sender->peer) { 467 return size; 468 } 469 470 queue = sender->peer->send_queue; 471 472 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb); 473 } 474 475 ssize_t qemu_send_packet_async(NetClientState *sender, 476 const uint8_t *buf, int size, 477 NetPacketSent *sent_cb) 478 { 479 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE, 480 buf, size, sent_cb); 481 } 482 483 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size) 484 { 485 qemu_send_packet_async(nc, buf, size, NULL); 486 } 487 488 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size) 489 { 490 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW, 491 buf, size, NULL); 492 } 493 494 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov, 495 int iovcnt) 496 { 497 uint8_t buffer[NET_BUFSIZE]; 498 size_t offset; 499 500 offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer)); 501 502 return nc->info->receive(nc, buffer, offset); 503 } 504 505 ssize_t qemu_deliver_packet_iov(NetClientState *sender, 506 unsigned flags, 507 const struct iovec *iov, 508 int iovcnt, 509 void *opaque) 510 { 511 NetClientState *nc = opaque; 512 int ret; 513 514 if (nc->link_down) { 515 return iov_size(iov, iovcnt); 516 } 517 518 if (nc->receive_disabled) { 519 return 0; 520 } 521 522 if (nc->info->receive_iov) { 523 ret = nc->info->receive_iov(nc, iov, iovcnt); 524 } else { 525 ret = nc_sendv_compat(nc, iov, iovcnt); 526 } 527 528 if (ret == 0) { 529 nc->receive_disabled = 1; 530 } 531 532 return ret; 533 } 534 535 ssize_t qemu_sendv_packet_async(NetClientState *sender, 536 const struct iovec *iov, int iovcnt, 537 NetPacketSent *sent_cb) 538 { 539 NetQueue *queue; 540 541 if (sender->link_down || !sender->peer) { 542 return iov_size(iov, iovcnt); 543 } 544 545 queue = sender->peer->send_queue; 546 547 return qemu_net_queue_send_iov(queue, sender, 548 QEMU_NET_PACKET_FLAG_NONE, 549 iov, iovcnt, sent_cb); 550 } 551 552 ssize_t 553 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt) 554 { 555 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL); 556 } 557 558 NetClientState *qemu_find_netdev(const char *id) 559 { 560 NetClientState *nc; 561 562 QTAILQ_FOREACH(nc, &net_clients, next) { 563 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) 564 continue; 565 if (!strcmp(nc->name, id)) { 566 return nc; 567 } 568 } 569 570 return NULL; 571 } 572 573 int qemu_find_net_clients_except(const char *id, NetClientState **ncs, 574 NetClientOptionsKind type, int max) 575 { 576 NetClientState *nc; 577 int ret = 0; 578 579 QTAILQ_FOREACH(nc, &net_clients, next) { 580 if (nc->info->type == type) { 581 continue; 582 } 583 if (!strcmp(nc->name, id)) { 584 if (ret < max) { 585 ncs[ret] = nc; 586 } 587 ret++; 588 } 589 } 590 591 return ret; 592 } 593 594 static int nic_get_free_idx(void) 595 { 596 int index; 597 598 for (index = 0; index < MAX_NICS; index++) 599 if (!nd_table[index].used) 600 return index; 601 return -1; 602 } 603 604 int qemu_show_nic_models(const char *arg, const char *const *models) 605 { 606 int i; 607 608 if (!arg || !is_help_option(arg)) { 609 return 0; 610 } 611 612 fprintf(stderr, "qemu: Supported NIC models: "); 613 for (i = 0 ; models[i]; i++) 614 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n'); 615 return 1; 616 } 617 618 void qemu_check_nic_model(NICInfo *nd, const char *model) 619 { 620 const char *models[2]; 621 622 models[0] = model; 623 models[1] = NULL; 624 625 if (qemu_show_nic_models(nd->model, models)) 626 exit(0); 627 if (qemu_find_nic_model(nd, models, model) < 0) 628 exit(1); 629 } 630 631 int qemu_find_nic_model(NICInfo *nd, const char * const *models, 632 const char *default_model) 633 { 634 int i; 635 636 if (!nd->model) 637 nd->model = g_strdup(default_model); 638 639 for (i = 0 ; models[i]; i++) { 640 if (strcmp(nd->model, models[i]) == 0) 641 return i; 642 } 643 644 error_report("Unsupported NIC model: %s", nd->model); 645 return -1; 646 } 647 648 static int net_init_nic(const NetClientOptions *opts, const char *name, 649 NetClientState *peer) 650 { 651 int idx; 652 NICInfo *nd; 653 const NetLegacyNicOptions *nic; 654 655 assert(opts->kind == NET_CLIENT_OPTIONS_KIND_NIC); 656 nic = opts->nic; 657 658 idx = nic_get_free_idx(); 659 if (idx == -1 || nb_nics >= MAX_NICS) { 660 error_report("Too Many NICs"); 661 return -1; 662 } 663 664 nd = &nd_table[idx]; 665 666 memset(nd, 0, sizeof(*nd)); 667 668 if (nic->has_netdev) { 669 nd->netdev = qemu_find_netdev(nic->netdev); 670 if (!nd->netdev) { 671 error_report("netdev '%s' not found", nic->netdev); 672 return -1; 673 } 674 } else { 675 assert(peer); 676 nd->netdev = peer; 677 } 678 nd->name = g_strdup(name); 679 if (nic->has_model) { 680 nd->model = g_strdup(nic->model); 681 } 682 if (nic->has_addr) { 683 nd->devaddr = g_strdup(nic->addr); 684 } 685 686 if (nic->has_macaddr && 687 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) { 688 error_report("invalid syntax for ethernet address"); 689 return -1; 690 } 691 qemu_macaddr_default_if_unset(&nd->macaddr); 692 693 if (nic->has_vectors) { 694 if (nic->vectors > 0x7ffffff) { 695 error_report("invalid # of vectors: %"PRIu32, nic->vectors); 696 return -1; 697 } 698 nd->nvectors = nic->vectors; 699 } else { 700 nd->nvectors = DEV_NVECTORS_UNSPECIFIED; 701 } 702 703 nd->used = 1; 704 nb_nics++; 705 706 return idx; 707 } 708 709 710 static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])( 711 const NetClientOptions *opts, 712 const char *name, 713 NetClientState *peer) = { 714 [NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic, 715 #ifdef CONFIG_SLIRP 716 [NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp, 717 #endif 718 [NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap, 719 [NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket, 720 #ifdef CONFIG_VDE 721 [NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde, 722 #endif 723 [NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump, 724 #ifdef CONFIG_NET_BRIDGE 725 [NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge, 726 #endif 727 [NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport, 728 }; 729 730 731 static int net_client_init1(const void *object, int is_netdev, Error **errp) 732 { 733 union { 734 const Netdev *netdev; 735 const NetLegacy *net; 736 } u; 737 const NetClientOptions *opts; 738 const char *name; 739 740 if (is_netdev) { 741 u.netdev = object; 742 opts = u.netdev->opts; 743 name = u.netdev->id; 744 745 switch (opts->kind) { 746 #ifdef CONFIG_SLIRP 747 case NET_CLIENT_OPTIONS_KIND_USER: 748 #endif 749 case NET_CLIENT_OPTIONS_KIND_TAP: 750 case NET_CLIENT_OPTIONS_KIND_SOCKET: 751 #ifdef CONFIG_VDE 752 case NET_CLIENT_OPTIONS_KIND_VDE: 753 #endif 754 #ifdef CONFIG_NET_BRIDGE 755 case NET_CLIENT_OPTIONS_KIND_BRIDGE: 756 #endif 757 case NET_CLIENT_OPTIONS_KIND_HUBPORT: 758 break; 759 760 default: 761 error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type", 762 "a netdev backend type"); 763 return -1; 764 } 765 } else { 766 u.net = object; 767 opts = u.net->opts; 768 /* missing optional values have been initialized to "all bits zero" */ 769 name = u.net->has_id ? u.net->id : u.net->name; 770 } 771 772 if (net_client_init_fun[opts->kind]) { 773 NetClientState *peer = NULL; 774 775 /* Do not add to a vlan if it's a -netdev or a nic with a netdev= 776 * parameter. */ 777 if (!is_netdev && 778 (opts->kind != NET_CLIENT_OPTIONS_KIND_NIC || 779 !opts->nic->has_netdev)) { 780 peer = net_hub_add_port(u.net->has_vlan ? u.net->vlan : 0, NULL); 781 } 782 783 if (net_client_init_fun[opts->kind](opts, name, peer) < 0) { 784 /* TODO push error reporting into init() methods */ 785 error_set(errp, QERR_DEVICE_INIT_FAILED, 786 NetClientOptionsKind_lookup[opts->kind]); 787 return -1; 788 } 789 } 790 return 0; 791 } 792 793 794 static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp) 795 { 796 if (is_netdev) { 797 visit_type_Netdev(v, (Netdev **)object, NULL, errp); 798 } else { 799 visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp); 800 } 801 } 802 803 804 int net_client_init(QemuOpts *opts, int is_netdev, Error **errp) 805 { 806 void *object = NULL; 807 Error *err = NULL; 808 int ret = -1; 809 810 { 811 OptsVisitor *ov = opts_visitor_new(opts); 812 813 net_visit(opts_get_visitor(ov), is_netdev, &object, &err); 814 opts_visitor_cleanup(ov); 815 } 816 817 if (!err) { 818 ret = net_client_init1(object, is_netdev, &err); 819 } 820 821 if (object) { 822 QapiDeallocVisitor *dv = qapi_dealloc_visitor_new(); 823 824 net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL); 825 qapi_dealloc_visitor_cleanup(dv); 826 } 827 828 error_propagate(errp, err); 829 return ret; 830 } 831 832 833 static int net_host_check_device(const char *device) 834 { 835 int i; 836 const char *valid_param_list[] = { "tap", "socket", "dump" 837 #ifdef CONFIG_NET_BRIDGE 838 , "bridge" 839 #endif 840 #ifdef CONFIG_SLIRP 841 ,"user" 842 #endif 843 #ifdef CONFIG_VDE 844 ,"vde" 845 #endif 846 }; 847 for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) { 848 if (!strncmp(valid_param_list[i], device, 849 strlen(valid_param_list[i]))) 850 return 1; 851 } 852 853 return 0; 854 } 855 856 void net_host_device_add(Monitor *mon, const QDict *qdict) 857 { 858 const char *device = qdict_get_str(qdict, "device"); 859 const char *opts_str = qdict_get_try_str(qdict, "opts"); 860 Error *local_err = NULL; 861 QemuOpts *opts; 862 863 if (!net_host_check_device(device)) { 864 monitor_printf(mon, "invalid host network device %s\n", device); 865 return; 866 } 867 868 opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0); 869 if (!opts) { 870 return; 871 } 872 873 qemu_opt_set(opts, "type", device); 874 875 net_client_init(opts, 0, &local_err); 876 if (error_is_set(&local_err)) { 877 qerror_report_err(local_err); 878 error_free(local_err); 879 monitor_printf(mon, "adding host network device %s failed\n", device); 880 } 881 } 882 883 void net_host_device_remove(Monitor *mon, const QDict *qdict) 884 { 885 NetClientState *nc; 886 int vlan_id = qdict_get_int(qdict, "vlan_id"); 887 const char *device = qdict_get_str(qdict, "device"); 888 889 nc = net_hub_find_client_by_name(vlan_id, device); 890 if (!nc) { 891 return; 892 } 893 if (!net_host_check_device(nc->model)) { 894 monitor_printf(mon, "invalid host network device %s\n", device); 895 return; 896 } 897 qemu_del_net_client(nc); 898 } 899 900 void netdev_add(QemuOpts *opts, Error **errp) 901 { 902 net_client_init(opts, 1, errp); 903 } 904 905 int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret) 906 { 907 Error *local_err = NULL; 908 QemuOptsList *opts_list; 909 QemuOpts *opts; 910 911 opts_list = qemu_find_opts_err("netdev", &local_err); 912 if (error_is_set(&local_err)) { 913 goto exit_err; 914 } 915 916 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err); 917 if (error_is_set(&local_err)) { 918 goto exit_err; 919 } 920 921 netdev_add(opts, &local_err); 922 if (error_is_set(&local_err)) { 923 qemu_opts_del(opts); 924 goto exit_err; 925 } 926 927 return 0; 928 929 exit_err: 930 qerror_report_err(local_err); 931 error_free(local_err); 932 return -1; 933 } 934 935 void qmp_netdev_del(const char *id, Error **errp) 936 { 937 NetClientState *nc; 938 QemuOpts *opts; 939 940 nc = qemu_find_netdev(id); 941 if (!nc) { 942 error_set(errp, QERR_DEVICE_NOT_FOUND, id); 943 return; 944 } 945 946 opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id); 947 if (!opts) { 948 error_setg(errp, "Device '%s' is not a netdev", id); 949 return; 950 } 951 952 qemu_del_net_client(nc); 953 qemu_opts_del(opts); 954 } 955 956 void print_net_client(Monitor *mon, NetClientState *nc) 957 { 958 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name, 959 nc->queue_index, 960 NetClientOptionsKind_lookup[nc->info->type], 961 nc->info_str); 962 } 963 964 void do_info_network(Monitor *mon, const QDict *qdict) 965 { 966 NetClientState *nc, *peer; 967 NetClientOptionsKind type; 968 969 net_hub_info(mon); 970 971 QTAILQ_FOREACH(nc, &net_clients, next) { 972 peer = nc->peer; 973 type = nc->info->type; 974 975 /* Skip if already printed in hub info */ 976 if (net_hub_id_for_client(nc, NULL) == 0) { 977 continue; 978 } 979 980 if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) { 981 print_net_client(mon, nc); 982 } /* else it's a netdev connected to a NIC, printed with the NIC */ 983 if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) { 984 monitor_printf(mon, " \\ "); 985 print_net_client(mon, peer); 986 } 987 } 988 } 989 990 void qmp_set_link(const char *name, bool up, Error **errp) 991 { 992 NetClientState *ncs[MAX_QUEUE_NUM]; 993 NetClientState *nc; 994 int queues, i; 995 996 queues = qemu_find_net_clients_except(name, ncs, 997 NET_CLIENT_OPTIONS_KIND_MAX, 998 MAX_QUEUE_NUM); 999 1000 if (queues == 0) { 1001 error_set(errp, QERR_DEVICE_NOT_FOUND, name); 1002 return; 1003 } 1004 nc = ncs[0]; 1005 1006 for (i = 0; i < queues; i++) { 1007 ncs[i]->link_down = !up; 1008 } 1009 1010 if (nc->info->link_status_changed) { 1011 nc->info->link_status_changed(nc); 1012 } 1013 1014 /* Notify peer. Don't update peer link status: this makes it possible to 1015 * disconnect from host network without notifying the guest. 1016 * FIXME: is disconnected link status change operation useful? 1017 * 1018 * Current behaviour is compatible with qemu vlans where there could be 1019 * multiple clients that can still communicate with each other in 1020 * disconnected mode. For now maintain this compatibility. */ 1021 if (nc->peer && nc->peer->info->link_status_changed) { 1022 nc->peer->info->link_status_changed(nc->peer); 1023 } 1024 } 1025 1026 void net_cleanup(void) 1027 { 1028 NetClientState *nc; 1029 1030 /* We may del multiple entries during qemu_del_net_client(), 1031 * so QTAILQ_FOREACH_SAFE() is also not safe here. 1032 */ 1033 while (!QTAILQ_EMPTY(&net_clients)) { 1034 nc = QTAILQ_FIRST(&net_clients); 1035 if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) { 1036 qemu_del_nic(qemu_get_nic(nc)); 1037 } else { 1038 qemu_del_net_client(nc); 1039 } 1040 } 1041 } 1042 1043 void net_check_clients(void) 1044 { 1045 NetClientState *nc; 1046 int i; 1047 1048 /* Don't warn about the default network setup that you get if 1049 * no command line -net or -netdev options are specified. There 1050 * are two cases that we would otherwise complain about: 1051 * (1) board doesn't support a NIC but the implicit "-net nic" 1052 * requested one 1053 * (2) CONFIG_SLIRP not set, in which case the implicit "-net nic" 1054 * sets up a nic that isn't connected to anything. 1055 */ 1056 if (default_net) { 1057 return; 1058 } 1059 1060 net_hub_check_clients(); 1061 1062 QTAILQ_FOREACH(nc, &net_clients, next) { 1063 if (!nc->peer) { 1064 fprintf(stderr, "Warning: %s %s has no peer\n", 1065 nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ? 1066 "nic" : "netdev", nc->name); 1067 } 1068 } 1069 1070 /* Check that all NICs requested via -net nic actually got created. 1071 * NICs created via -device don't need to be checked here because 1072 * they are always instantiated. 1073 */ 1074 for (i = 0; i < MAX_NICS; i++) { 1075 NICInfo *nd = &nd_table[i]; 1076 if (nd->used && !nd->instantiated) { 1077 fprintf(stderr, "Warning: requested NIC (%s, model %s) " 1078 "was not created (not supported by this machine?)\n", 1079 nd->name ? nd->name : "anonymous", 1080 nd->model ? nd->model : "unspecified"); 1081 } 1082 } 1083 } 1084 1085 static int net_init_client(QemuOpts *opts, void *dummy) 1086 { 1087 Error *local_err = NULL; 1088 1089 net_client_init(opts, 0, &local_err); 1090 if (error_is_set(&local_err)) { 1091 qerror_report_err(local_err); 1092 error_free(local_err); 1093 return -1; 1094 } 1095 1096 return 0; 1097 } 1098 1099 static int net_init_netdev(QemuOpts *opts, void *dummy) 1100 { 1101 Error *local_err = NULL; 1102 int ret; 1103 1104 ret = net_client_init(opts, 1, &local_err); 1105 if (error_is_set(&local_err)) { 1106 qerror_report_err(local_err); 1107 error_free(local_err); 1108 return -1; 1109 } 1110 1111 return ret; 1112 } 1113 1114 int net_init_clients(void) 1115 { 1116 QemuOptsList *net = qemu_find_opts("net"); 1117 1118 if (default_net) { 1119 /* if no clients, we use a default config */ 1120 qemu_opts_set(net, NULL, "type", "nic"); 1121 #ifdef CONFIG_SLIRP 1122 qemu_opts_set(net, NULL, "type", "user"); 1123 #endif 1124 } 1125 1126 QTAILQ_INIT(&net_clients); 1127 1128 if (qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL, 1) == -1) 1129 return -1; 1130 1131 if (qemu_opts_foreach(net, net_init_client, NULL, 1) == -1) { 1132 return -1; 1133 } 1134 1135 return 0; 1136 } 1137 1138 int net_client_parse(QemuOptsList *opts_list, const char *optarg) 1139 { 1140 #if defined(CONFIG_SLIRP) 1141 int ret; 1142 if (net_slirp_parse_legacy(opts_list, optarg, &ret)) { 1143 return ret; 1144 } 1145 #endif 1146 1147 if (!qemu_opts_parse(opts_list, optarg, 1)) { 1148 return -1; 1149 } 1150 1151 default_net = 0; 1152 return 0; 1153 } 1154 1155 /* From FreeBSD */ 1156 /* XXX: optimize */ 1157 unsigned compute_mcast_idx(const uint8_t *ep) 1158 { 1159 uint32_t crc; 1160 int carry, i, j; 1161 uint8_t b; 1162 1163 crc = 0xffffffff; 1164 for (i = 0; i < 6; i++) { 1165 b = *ep++; 1166 for (j = 0; j < 8; j++) { 1167 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01); 1168 crc <<= 1; 1169 b >>= 1; 1170 if (carry) { 1171 crc = ((crc ^ POLYNOMIAL) | carry); 1172 } 1173 } 1174 } 1175 return crc >> 26; 1176 } 1177 1178 QemuOptsList qemu_netdev_opts = { 1179 .name = "netdev", 1180 .implied_opt_name = "type", 1181 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head), 1182 .desc = { 1183 /* 1184 * no elements => accept any params 1185 * validation will happen later 1186 */ 1187 { /* end of list */ } 1188 }, 1189 }; 1190 1191 QemuOptsList qemu_net_opts = { 1192 .name = "net", 1193 .implied_opt_name = "type", 1194 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head), 1195 .desc = { 1196 /* 1197 * no elements => accept any params 1198 * validation will happen later 1199 */ 1200 { /* end of list */ } 1201 }, 1202 }; 1203