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 25 #include "qemu/osdep.h" 26 27 #include "net/net.h" 28 #include "clients.h" 29 #include "hub.h" 30 #include "net/slirp.h" 31 #include "net/eth.h" 32 #include "util.h" 33 34 #include "monitor/monitor.h" 35 #include "qemu/help_option.h" 36 #include "qapi/qapi-commands-net.h" 37 #include "qapi/qapi-visit-net.h" 38 #include "qapi/qmp/qdict.h" 39 #include "qapi/qmp/qerror.h" 40 #include "qemu/error-report.h" 41 #include "qemu/sockets.h" 42 #include "qemu/cutils.h" 43 #include "qemu/config-file.h" 44 #include "qemu/ctype.h" 45 #include "hw/qdev.h" 46 #include "qemu/iov.h" 47 #include "qemu/main-loop.h" 48 #include "qemu/option.h" 49 #include "qapi/error.h" 50 #include "qapi/opts-visitor.h" 51 #include "sysemu/sysemu.h" 52 #include "sysemu/qtest.h" 53 #include "net/filter.h" 54 #include "qapi/string-output-visitor.h" 55 56 /* Net bridge is currently not supported for W32. */ 57 #if !defined(_WIN32) 58 # define CONFIG_NET_BRIDGE 59 #endif 60 61 static VMChangeStateEntry *net_change_state_entry; 62 static QTAILQ_HEAD(, NetClientState) net_clients; 63 64 /***********************************************************/ 65 /* network device redirectors */ 66 67 int parse_host_port(struct sockaddr_in *saddr, const char *str, 68 Error **errp) 69 { 70 gchar **substrings; 71 struct hostent *he; 72 const char *addr, *p, *r; 73 int port, ret = 0; 74 75 substrings = g_strsplit(str, ":", 2); 76 if (!substrings || !substrings[0] || !substrings[1]) { 77 error_setg(errp, "host address '%s' doesn't contain ':' " 78 "separating host from port", str); 79 ret = -1; 80 goto out; 81 } 82 83 addr = substrings[0]; 84 p = substrings[1]; 85 86 saddr->sin_family = AF_INET; 87 if (addr[0] == '\0') { 88 saddr->sin_addr.s_addr = 0; 89 } else { 90 if (qemu_isdigit(addr[0])) { 91 if (!inet_aton(addr, &saddr->sin_addr)) { 92 error_setg(errp, "host address '%s' is not a valid " 93 "IPv4 address", addr); 94 ret = -1; 95 goto out; 96 } 97 } else { 98 he = gethostbyname(addr); 99 if (he == NULL) { 100 error_setg(errp, "can't resolve host address '%s'", addr); 101 ret = -1; 102 goto out; 103 } 104 saddr->sin_addr = *(struct in_addr *)he->h_addr; 105 } 106 } 107 port = strtol(p, (char **)&r, 0); 108 if (r == p) { 109 error_setg(errp, "port number '%s' is invalid", p); 110 ret = -1; 111 goto out; 112 } 113 saddr->sin_port = htons(port); 114 115 out: 116 g_strfreev(substrings); 117 return ret; 118 } 119 120 char *qemu_mac_strdup_printf(const uint8_t *macaddr) 121 { 122 return g_strdup_printf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x", 123 macaddr[0], macaddr[1], macaddr[2], 124 macaddr[3], macaddr[4], macaddr[5]); 125 } 126 127 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]) 128 { 129 snprintf(nc->info_str, sizeof(nc->info_str), 130 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x", 131 nc->model, 132 macaddr[0], macaddr[1], macaddr[2], 133 macaddr[3], macaddr[4], macaddr[5]); 134 } 135 136 static int mac_table[256] = {0}; 137 138 static void qemu_macaddr_set_used(MACAddr *macaddr) 139 { 140 int index; 141 142 for (index = 0x56; index < 0xFF; index++) { 143 if (macaddr->a[5] == index) { 144 mac_table[index]++; 145 } 146 } 147 } 148 149 static void qemu_macaddr_set_free(MACAddr *macaddr) 150 { 151 int index; 152 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } }; 153 154 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) { 155 return; 156 } 157 for (index = 0x56; index < 0xFF; index++) { 158 if (macaddr->a[5] == index) { 159 mac_table[index]--; 160 } 161 } 162 } 163 164 static int qemu_macaddr_get_free(void) 165 { 166 int index; 167 168 for (index = 0x56; index < 0xFF; index++) { 169 if (mac_table[index] == 0) { 170 return index; 171 } 172 } 173 174 return -1; 175 } 176 177 void qemu_macaddr_default_if_unset(MACAddr *macaddr) 178 { 179 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } }; 180 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } }; 181 182 if (memcmp(macaddr, &zero, sizeof(zero)) != 0) { 183 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) { 184 return; 185 } else { 186 qemu_macaddr_set_used(macaddr); 187 return; 188 } 189 } 190 191 macaddr->a[0] = 0x52; 192 macaddr->a[1] = 0x54; 193 macaddr->a[2] = 0x00; 194 macaddr->a[3] = 0x12; 195 macaddr->a[4] = 0x34; 196 macaddr->a[5] = qemu_macaddr_get_free(); 197 qemu_macaddr_set_used(macaddr); 198 } 199 200 /** 201 * Generate a name for net client 202 * 203 * Only net clients created with the legacy -net option and NICs need this. 204 */ 205 static char *assign_name(NetClientState *nc1, const char *model) 206 { 207 NetClientState *nc; 208 int id = 0; 209 210 QTAILQ_FOREACH(nc, &net_clients, next) { 211 if (nc == nc1) { 212 continue; 213 } 214 if (strcmp(nc->model, model) == 0) { 215 id++; 216 } 217 } 218 219 return g_strdup_printf("%s.%d", model, id); 220 } 221 222 static void qemu_net_client_destructor(NetClientState *nc) 223 { 224 g_free(nc); 225 } 226 static ssize_t qemu_deliver_packet_iov(NetClientState *sender, 227 unsigned flags, 228 const struct iovec *iov, 229 int iovcnt, 230 void *opaque); 231 232 static void qemu_net_client_setup(NetClientState *nc, 233 NetClientInfo *info, 234 NetClientState *peer, 235 const char *model, 236 const char *name, 237 NetClientDestructor *destructor) 238 { 239 nc->info = info; 240 nc->model = g_strdup(model); 241 if (name) { 242 nc->name = g_strdup(name); 243 } else { 244 nc->name = assign_name(nc, model); 245 } 246 247 if (peer) { 248 assert(!peer->peer); 249 nc->peer = peer; 250 peer->peer = nc; 251 } 252 QTAILQ_INSERT_TAIL(&net_clients, nc, next); 253 254 nc->incoming_queue = qemu_new_net_queue(qemu_deliver_packet_iov, nc); 255 nc->destructor = destructor; 256 QTAILQ_INIT(&nc->filters); 257 } 258 259 NetClientState *qemu_new_net_client(NetClientInfo *info, 260 NetClientState *peer, 261 const char *model, 262 const char *name) 263 { 264 NetClientState *nc; 265 266 assert(info->size >= sizeof(NetClientState)); 267 268 nc = g_malloc0(info->size); 269 qemu_net_client_setup(nc, info, peer, model, name, 270 qemu_net_client_destructor); 271 272 return nc; 273 } 274 275 NICState *qemu_new_nic(NetClientInfo *info, 276 NICConf *conf, 277 const char *model, 278 const char *name, 279 void *opaque) 280 { 281 NetClientState **peers = conf->peers.ncs; 282 NICState *nic; 283 int i, queues = MAX(1, conf->peers.queues); 284 285 assert(info->type == NET_CLIENT_DRIVER_NIC); 286 assert(info->size >= sizeof(NICState)); 287 288 nic = g_malloc0(info->size + sizeof(NetClientState) * queues); 289 nic->ncs = (void *)nic + info->size; 290 nic->conf = conf; 291 nic->opaque = opaque; 292 293 for (i = 0; i < queues; i++) { 294 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name, 295 NULL); 296 nic->ncs[i].queue_index = i; 297 } 298 299 return nic; 300 } 301 302 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index) 303 { 304 return nic->ncs + queue_index; 305 } 306 307 NetClientState *qemu_get_queue(NICState *nic) 308 { 309 return qemu_get_subqueue(nic, 0); 310 } 311 312 NICState *qemu_get_nic(NetClientState *nc) 313 { 314 NetClientState *nc0 = nc - nc->queue_index; 315 316 return (NICState *)((void *)nc0 - nc->info->size); 317 } 318 319 void *qemu_get_nic_opaque(NetClientState *nc) 320 { 321 NICState *nic = qemu_get_nic(nc); 322 323 return nic->opaque; 324 } 325 326 static void qemu_cleanup_net_client(NetClientState *nc) 327 { 328 QTAILQ_REMOVE(&net_clients, nc, next); 329 330 if (nc->info->cleanup) { 331 nc->info->cleanup(nc); 332 } 333 } 334 335 static void qemu_free_net_client(NetClientState *nc) 336 { 337 if (nc->incoming_queue) { 338 qemu_del_net_queue(nc->incoming_queue); 339 } 340 if (nc->peer) { 341 nc->peer->peer = NULL; 342 } 343 g_free(nc->name); 344 g_free(nc->model); 345 if (nc->destructor) { 346 nc->destructor(nc); 347 } 348 } 349 350 void qemu_del_net_client(NetClientState *nc) 351 { 352 NetClientState *ncs[MAX_QUEUE_NUM]; 353 int queues, i; 354 NetFilterState *nf, *next; 355 356 assert(nc->info->type != NET_CLIENT_DRIVER_NIC); 357 358 /* If the NetClientState belongs to a multiqueue backend, we will change all 359 * other NetClientStates also. 360 */ 361 queues = qemu_find_net_clients_except(nc->name, ncs, 362 NET_CLIENT_DRIVER_NIC, 363 MAX_QUEUE_NUM); 364 assert(queues != 0); 365 366 QTAILQ_FOREACH_SAFE(nf, &nc->filters, next, next) { 367 object_unparent(OBJECT(nf)); 368 } 369 370 /* If there is a peer NIC, delete and cleanup client, but do not free. */ 371 if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_NIC) { 372 NICState *nic = qemu_get_nic(nc->peer); 373 if (nic->peer_deleted) { 374 return; 375 } 376 nic->peer_deleted = true; 377 378 for (i = 0; i < queues; i++) { 379 ncs[i]->peer->link_down = true; 380 } 381 382 if (nc->peer->info->link_status_changed) { 383 nc->peer->info->link_status_changed(nc->peer); 384 } 385 386 for (i = 0; i < queues; i++) { 387 qemu_cleanup_net_client(ncs[i]); 388 } 389 390 return; 391 } 392 393 for (i = 0; i < queues; i++) { 394 qemu_cleanup_net_client(ncs[i]); 395 qemu_free_net_client(ncs[i]); 396 } 397 } 398 399 void qemu_del_nic(NICState *nic) 400 { 401 int i, queues = MAX(nic->conf->peers.queues, 1); 402 403 qemu_macaddr_set_free(&nic->conf->macaddr); 404 405 /* If this is a peer NIC and peer has already been deleted, free it now. */ 406 if (nic->peer_deleted) { 407 for (i = 0; i < queues; i++) { 408 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer); 409 } 410 } 411 412 for (i = queues - 1; i >= 0; i--) { 413 NetClientState *nc = qemu_get_subqueue(nic, i); 414 415 qemu_cleanup_net_client(nc); 416 qemu_free_net_client(nc); 417 } 418 419 g_free(nic); 420 } 421 422 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque) 423 { 424 NetClientState *nc; 425 426 QTAILQ_FOREACH(nc, &net_clients, next) { 427 if (nc->info->type == NET_CLIENT_DRIVER_NIC) { 428 if (nc->queue_index == 0) { 429 func(qemu_get_nic(nc), opaque); 430 } 431 } 432 } 433 } 434 435 bool qemu_has_ufo(NetClientState *nc) 436 { 437 if (!nc || !nc->info->has_ufo) { 438 return false; 439 } 440 441 return nc->info->has_ufo(nc); 442 } 443 444 bool qemu_has_vnet_hdr(NetClientState *nc) 445 { 446 if (!nc || !nc->info->has_vnet_hdr) { 447 return false; 448 } 449 450 return nc->info->has_vnet_hdr(nc); 451 } 452 453 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len) 454 { 455 if (!nc || !nc->info->has_vnet_hdr_len) { 456 return false; 457 } 458 459 return nc->info->has_vnet_hdr_len(nc, len); 460 } 461 462 void qemu_using_vnet_hdr(NetClientState *nc, bool enable) 463 { 464 if (!nc || !nc->info->using_vnet_hdr) { 465 return; 466 } 467 468 nc->info->using_vnet_hdr(nc, enable); 469 } 470 471 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6, 472 int ecn, int ufo) 473 { 474 if (!nc || !nc->info->set_offload) { 475 return; 476 } 477 478 nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo); 479 } 480 481 void qemu_set_vnet_hdr_len(NetClientState *nc, int len) 482 { 483 if (!nc || !nc->info->set_vnet_hdr_len) { 484 return; 485 } 486 487 nc->vnet_hdr_len = len; 488 nc->info->set_vnet_hdr_len(nc, len); 489 } 490 491 int qemu_set_vnet_le(NetClientState *nc, bool is_le) 492 { 493 #ifdef HOST_WORDS_BIGENDIAN 494 if (!nc || !nc->info->set_vnet_le) { 495 return -ENOSYS; 496 } 497 498 return nc->info->set_vnet_le(nc, is_le); 499 #else 500 return 0; 501 #endif 502 } 503 504 int qemu_set_vnet_be(NetClientState *nc, bool is_be) 505 { 506 #ifdef HOST_WORDS_BIGENDIAN 507 return 0; 508 #else 509 if (!nc || !nc->info->set_vnet_be) { 510 return -ENOSYS; 511 } 512 513 return nc->info->set_vnet_be(nc, is_be); 514 #endif 515 } 516 517 int qemu_can_send_packet(NetClientState *sender) 518 { 519 int vm_running = runstate_is_running(); 520 521 if (!vm_running) { 522 return 0; 523 } 524 525 if (!sender->peer) { 526 return 1; 527 } 528 529 if (sender->peer->receive_disabled) { 530 return 0; 531 } else if (sender->peer->info->can_receive && 532 !sender->peer->info->can_receive(sender->peer)) { 533 return 0; 534 } 535 return 1; 536 } 537 538 static ssize_t filter_receive_iov(NetClientState *nc, 539 NetFilterDirection direction, 540 NetClientState *sender, 541 unsigned flags, 542 const struct iovec *iov, 543 int iovcnt, 544 NetPacketSent *sent_cb) 545 { 546 ssize_t ret = 0; 547 NetFilterState *nf = NULL; 548 549 if (direction == NET_FILTER_DIRECTION_TX) { 550 QTAILQ_FOREACH(nf, &nc->filters, next) { 551 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov, 552 iovcnt, sent_cb); 553 if (ret) { 554 return ret; 555 } 556 } 557 } else { 558 QTAILQ_FOREACH_REVERSE(nf, &nc->filters, next) { 559 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov, 560 iovcnt, sent_cb); 561 if (ret) { 562 return ret; 563 } 564 } 565 } 566 567 return ret; 568 } 569 570 static ssize_t filter_receive(NetClientState *nc, 571 NetFilterDirection direction, 572 NetClientState *sender, 573 unsigned flags, 574 const uint8_t *data, 575 size_t size, 576 NetPacketSent *sent_cb) 577 { 578 struct iovec iov = { 579 .iov_base = (void *)data, 580 .iov_len = size 581 }; 582 583 return filter_receive_iov(nc, direction, sender, flags, &iov, 1, sent_cb); 584 } 585 586 void qemu_purge_queued_packets(NetClientState *nc) 587 { 588 if (!nc->peer) { 589 return; 590 } 591 592 qemu_net_queue_purge(nc->peer->incoming_queue, nc); 593 } 594 595 void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge) 596 { 597 nc->receive_disabled = 0; 598 599 if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_HUBPORT) { 600 if (net_hub_flush(nc->peer)) { 601 qemu_notify_event(); 602 } 603 } 604 if (qemu_net_queue_flush(nc->incoming_queue)) { 605 /* We emptied the queue successfully, signal to the IO thread to repoll 606 * the file descriptor (for tap, for example). 607 */ 608 qemu_notify_event(); 609 } else if (purge) { 610 /* Unable to empty the queue, purge remaining packets */ 611 qemu_net_queue_purge(nc->incoming_queue, nc); 612 } 613 } 614 615 void qemu_flush_queued_packets(NetClientState *nc) 616 { 617 qemu_flush_or_purge_queued_packets(nc, false); 618 } 619 620 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender, 621 unsigned flags, 622 const uint8_t *buf, int size, 623 NetPacketSent *sent_cb) 624 { 625 NetQueue *queue; 626 int ret; 627 628 #ifdef DEBUG_NET 629 printf("qemu_send_packet_async:\n"); 630 qemu_hexdump((const char *)buf, stdout, "net", size); 631 #endif 632 633 if (sender->link_down || !sender->peer) { 634 return size; 635 } 636 637 /* Let filters handle the packet first */ 638 ret = filter_receive(sender, NET_FILTER_DIRECTION_TX, 639 sender, flags, buf, size, sent_cb); 640 if (ret) { 641 return ret; 642 } 643 644 ret = filter_receive(sender->peer, NET_FILTER_DIRECTION_RX, 645 sender, flags, buf, size, sent_cb); 646 if (ret) { 647 return ret; 648 } 649 650 queue = sender->peer->incoming_queue; 651 652 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb); 653 } 654 655 ssize_t qemu_send_packet_async(NetClientState *sender, 656 const uint8_t *buf, int size, 657 NetPacketSent *sent_cb) 658 { 659 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE, 660 buf, size, sent_cb); 661 } 662 663 ssize_t qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size) 664 { 665 return qemu_send_packet_async(nc, buf, size, NULL); 666 } 667 668 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size) 669 { 670 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW, 671 buf, size, NULL); 672 } 673 674 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov, 675 int iovcnt, unsigned flags) 676 { 677 uint8_t *buf = NULL; 678 uint8_t *buffer; 679 size_t offset; 680 ssize_t ret; 681 682 if (iovcnt == 1) { 683 buffer = iov[0].iov_base; 684 offset = iov[0].iov_len; 685 } else { 686 offset = iov_size(iov, iovcnt); 687 if (offset > NET_BUFSIZE) { 688 return -1; 689 } 690 buf = g_malloc(offset); 691 buffer = buf; 692 offset = iov_to_buf(iov, iovcnt, 0, buf, offset); 693 } 694 695 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) { 696 ret = nc->info->receive_raw(nc, buffer, offset); 697 } else { 698 ret = nc->info->receive(nc, buffer, offset); 699 } 700 701 g_free(buf); 702 return ret; 703 } 704 705 static ssize_t qemu_deliver_packet_iov(NetClientState *sender, 706 unsigned flags, 707 const struct iovec *iov, 708 int iovcnt, 709 void *opaque) 710 { 711 NetClientState *nc = opaque; 712 int ret; 713 714 715 if (nc->link_down) { 716 return iov_size(iov, iovcnt); 717 } 718 719 if (nc->receive_disabled) { 720 return 0; 721 } 722 723 if (nc->info->receive_iov && !(flags & QEMU_NET_PACKET_FLAG_RAW)) { 724 ret = nc->info->receive_iov(nc, iov, iovcnt); 725 } else { 726 ret = nc_sendv_compat(nc, iov, iovcnt, flags); 727 } 728 729 if (ret == 0) { 730 nc->receive_disabled = 1; 731 } 732 733 return ret; 734 } 735 736 ssize_t qemu_sendv_packet_async(NetClientState *sender, 737 const struct iovec *iov, int iovcnt, 738 NetPacketSent *sent_cb) 739 { 740 NetQueue *queue; 741 size_t size = iov_size(iov, iovcnt); 742 int ret; 743 744 if (size > NET_BUFSIZE) { 745 return size; 746 } 747 748 if (sender->link_down || !sender->peer) { 749 return size; 750 } 751 752 /* Let filters handle the packet first */ 753 ret = filter_receive_iov(sender, NET_FILTER_DIRECTION_TX, sender, 754 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb); 755 if (ret) { 756 return ret; 757 } 758 759 ret = filter_receive_iov(sender->peer, NET_FILTER_DIRECTION_RX, sender, 760 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb); 761 if (ret) { 762 return ret; 763 } 764 765 queue = sender->peer->incoming_queue; 766 767 return qemu_net_queue_send_iov(queue, sender, 768 QEMU_NET_PACKET_FLAG_NONE, 769 iov, iovcnt, sent_cb); 770 } 771 772 ssize_t 773 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt) 774 { 775 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL); 776 } 777 778 NetClientState *qemu_find_netdev(const char *id) 779 { 780 NetClientState *nc; 781 782 QTAILQ_FOREACH(nc, &net_clients, next) { 783 if (nc->info->type == NET_CLIENT_DRIVER_NIC) 784 continue; 785 if (!strcmp(nc->name, id)) { 786 return nc; 787 } 788 } 789 790 return NULL; 791 } 792 793 int qemu_find_net_clients_except(const char *id, NetClientState **ncs, 794 NetClientDriver type, int max) 795 { 796 NetClientState *nc; 797 int ret = 0; 798 799 QTAILQ_FOREACH(nc, &net_clients, next) { 800 if (nc->info->type == type) { 801 continue; 802 } 803 if (!id || !strcmp(nc->name, id)) { 804 if (ret < max) { 805 ncs[ret] = nc; 806 } 807 ret++; 808 } 809 } 810 811 return ret; 812 } 813 814 static int nic_get_free_idx(void) 815 { 816 int index; 817 818 for (index = 0; index < MAX_NICS; index++) 819 if (!nd_table[index].used) 820 return index; 821 return -1; 822 } 823 824 int qemu_show_nic_models(const char *arg, const char *const *models) 825 { 826 int i; 827 828 if (!arg || !is_help_option(arg)) { 829 return 0; 830 } 831 832 printf("Supported NIC models:\n"); 833 for (i = 0 ; models[i]; i++) { 834 printf("%s\n", models[i]); 835 } 836 return 1; 837 } 838 839 void qemu_check_nic_model(NICInfo *nd, const char *model) 840 { 841 const char *models[2]; 842 843 models[0] = model; 844 models[1] = NULL; 845 846 if (qemu_show_nic_models(nd->model, models)) 847 exit(0); 848 if (qemu_find_nic_model(nd, models, model) < 0) 849 exit(1); 850 } 851 852 int qemu_find_nic_model(NICInfo *nd, const char * const *models, 853 const char *default_model) 854 { 855 int i; 856 857 if (!nd->model) 858 nd->model = g_strdup(default_model); 859 860 for (i = 0 ; models[i]; i++) { 861 if (strcmp(nd->model, models[i]) == 0) 862 return i; 863 } 864 865 error_report("Unsupported NIC model: %s", nd->model); 866 return -1; 867 } 868 869 static int net_init_nic(const Netdev *netdev, const char *name, 870 NetClientState *peer, Error **errp) 871 { 872 int idx; 873 NICInfo *nd; 874 const NetLegacyNicOptions *nic; 875 876 assert(netdev->type == NET_CLIENT_DRIVER_NIC); 877 nic = &netdev->u.nic; 878 879 idx = nic_get_free_idx(); 880 if (idx == -1 || nb_nics >= MAX_NICS) { 881 error_setg(errp, "too many NICs"); 882 return -1; 883 } 884 885 nd = &nd_table[idx]; 886 887 memset(nd, 0, sizeof(*nd)); 888 889 if (nic->has_netdev) { 890 nd->netdev = qemu_find_netdev(nic->netdev); 891 if (!nd->netdev) { 892 error_setg(errp, "netdev '%s' not found", nic->netdev); 893 return -1; 894 } 895 } else { 896 assert(peer); 897 nd->netdev = peer; 898 } 899 nd->name = g_strdup(name); 900 if (nic->has_model) { 901 nd->model = g_strdup(nic->model); 902 } 903 if (nic->has_addr) { 904 nd->devaddr = g_strdup(nic->addr); 905 } 906 907 if (nic->has_macaddr && 908 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) { 909 error_setg(errp, "invalid syntax for ethernet address"); 910 return -1; 911 } 912 if (nic->has_macaddr && 913 is_multicast_ether_addr(nd->macaddr.a)) { 914 error_setg(errp, 915 "NIC cannot have multicast MAC address (odd 1st byte)"); 916 return -1; 917 } 918 qemu_macaddr_default_if_unset(&nd->macaddr); 919 920 if (nic->has_vectors) { 921 if (nic->vectors > 0x7ffffff) { 922 error_setg(errp, "invalid # of vectors: %"PRIu32, nic->vectors); 923 return -1; 924 } 925 nd->nvectors = nic->vectors; 926 } else { 927 nd->nvectors = DEV_NVECTORS_UNSPECIFIED; 928 } 929 930 nd->used = 1; 931 nb_nics++; 932 933 return idx; 934 } 935 936 937 static int (* const net_client_init_fun[NET_CLIENT_DRIVER__MAX])( 938 const Netdev *netdev, 939 const char *name, 940 NetClientState *peer, Error **errp) = { 941 [NET_CLIENT_DRIVER_NIC] = net_init_nic, 942 #ifdef CONFIG_SLIRP 943 [NET_CLIENT_DRIVER_USER] = net_init_slirp, 944 #endif 945 [NET_CLIENT_DRIVER_TAP] = net_init_tap, 946 [NET_CLIENT_DRIVER_SOCKET] = net_init_socket, 947 #ifdef CONFIG_VDE 948 [NET_CLIENT_DRIVER_VDE] = net_init_vde, 949 #endif 950 #ifdef CONFIG_NETMAP 951 [NET_CLIENT_DRIVER_NETMAP] = net_init_netmap, 952 #endif 953 #ifdef CONFIG_NET_BRIDGE 954 [NET_CLIENT_DRIVER_BRIDGE] = net_init_bridge, 955 #endif 956 [NET_CLIENT_DRIVER_HUBPORT] = net_init_hubport, 957 #ifdef CONFIG_VHOST_NET_USER 958 [NET_CLIENT_DRIVER_VHOST_USER] = net_init_vhost_user, 959 #endif 960 #ifdef CONFIG_L2TPV3 961 [NET_CLIENT_DRIVER_L2TPV3] = net_init_l2tpv3, 962 #endif 963 }; 964 965 966 static int net_client_init1(const void *object, bool is_netdev, Error **errp) 967 { 968 Netdev legacy = {0}; 969 const Netdev *netdev; 970 const char *name; 971 NetClientState *peer = NULL; 972 973 if (is_netdev) { 974 netdev = object; 975 name = netdev->id; 976 977 if (netdev->type == NET_CLIENT_DRIVER_NIC || 978 !net_client_init_fun[netdev->type]) { 979 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type", 980 "a netdev backend type"); 981 return -1; 982 } 983 } else { 984 const NetLegacy *net = object; 985 const NetLegacyOptions *opts = net->opts; 986 legacy.id = net->id; 987 netdev = &legacy; 988 /* missing optional values have been initialized to "all bits zero" */ 989 name = net->has_id ? net->id : net->name; 990 991 if (net->has_name) { 992 warn_report("The 'name' parameter is deprecated, use 'id' instead"); 993 } 994 995 /* Map the old options to the new flat type */ 996 switch (opts->type) { 997 case NET_LEGACY_OPTIONS_TYPE_NONE: 998 return 0; /* nothing to do */ 999 case NET_LEGACY_OPTIONS_TYPE_NIC: 1000 legacy.type = NET_CLIENT_DRIVER_NIC; 1001 legacy.u.nic = opts->u.nic; 1002 break; 1003 case NET_LEGACY_OPTIONS_TYPE_USER: 1004 legacy.type = NET_CLIENT_DRIVER_USER; 1005 legacy.u.user = opts->u.user; 1006 break; 1007 case NET_LEGACY_OPTIONS_TYPE_TAP: 1008 legacy.type = NET_CLIENT_DRIVER_TAP; 1009 legacy.u.tap = opts->u.tap; 1010 break; 1011 case NET_LEGACY_OPTIONS_TYPE_L2TPV3: 1012 legacy.type = NET_CLIENT_DRIVER_L2TPV3; 1013 legacy.u.l2tpv3 = opts->u.l2tpv3; 1014 break; 1015 case NET_LEGACY_OPTIONS_TYPE_SOCKET: 1016 legacy.type = NET_CLIENT_DRIVER_SOCKET; 1017 legacy.u.socket = opts->u.socket; 1018 break; 1019 case NET_LEGACY_OPTIONS_TYPE_VDE: 1020 legacy.type = NET_CLIENT_DRIVER_VDE; 1021 legacy.u.vde = opts->u.vde; 1022 break; 1023 case NET_LEGACY_OPTIONS_TYPE_BRIDGE: 1024 legacy.type = NET_CLIENT_DRIVER_BRIDGE; 1025 legacy.u.bridge = opts->u.bridge; 1026 break; 1027 case NET_LEGACY_OPTIONS_TYPE_NETMAP: 1028 legacy.type = NET_CLIENT_DRIVER_NETMAP; 1029 legacy.u.netmap = opts->u.netmap; 1030 break; 1031 case NET_LEGACY_OPTIONS_TYPE_VHOST_USER: 1032 legacy.type = NET_CLIENT_DRIVER_VHOST_USER; 1033 legacy.u.vhost_user = opts->u.vhost_user; 1034 break; 1035 default: 1036 abort(); 1037 } 1038 1039 if (!net_client_init_fun[netdev->type]) { 1040 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type", 1041 "a net backend type (maybe it is not compiled " 1042 "into this binary)"); 1043 return -1; 1044 } 1045 1046 /* Do not add to a hub if it's a nic with a netdev= parameter. */ 1047 if (netdev->type != NET_CLIENT_DRIVER_NIC || 1048 !opts->u.nic.has_netdev) { 1049 peer = net_hub_add_port(0, NULL, NULL); 1050 } 1051 } 1052 1053 if (net_client_init_fun[netdev->type](netdev, name, peer, errp) < 0) { 1054 /* FIXME drop when all init functions store an Error */ 1055 if (errp && !*errp) { 1056 error_setg(errp, QERR_DEVICE_INIT_FAILED, 1057 NetClientDriver_str(netdev->type)); 1058 } 1059 return -1; 1060 } 1061 return 0; 1062 } 1063 1064 static void show_netdevs(void) 1065 { 1066 int idx; 1067 const char *available_netdevs[] = { 1068 "socket", 1069 "hubport", 1070 "tap", 1071 #ifdef CONFIG_SLIRP 1072 "user", 1073 #endif 1074 #ifdef CONFIG_L2TPV3 1075 "l2tpv3", 1076 #endif 1077 #ifdef CONFIG_VDE 1078 "vde", 1079 #endif 1080 #ifdef CONFIG_NET_BRIDGE 1081 "bridge", 1082 #endif 1083 #ifdef CONFIG_NETMAP 1084 "netmap", 1085 #endif 1086 #ifdef CONFIG_POSIX 1087 "vhost-user", 1088 #endif 1089 }; 1090 1091 printf("Available netdev backend types:\n"); 1092 for (idx = 0; idx < ARRAY_SIZE(available_netdevs); idx++) { 1093 puts(available_netdevs[idx]); 1094 } 1095 } 1096 1097 static int net_client_init(QemuOpts *opts, bool is_netdev, Error **errp) 1098 { 1099 gchar **substrings = NULL; 1100 void *object = NULL; 1101 Error *err = NULL; 1102 int ret = -1; 1103 Visitor *v = opts_visitor_new(opts); 1104 1105 const char *type = qemu_opt_get(opts, "type"); 1106 1107 if (is_netdev && type && is_help_option(type)) { 1108 show_netdevs(); 1109 exit(0); 1110 } else { 1111 /* Parse convenience option format ip6-net=fec0::0[/64] */ 1112 const char *ip6_net = qemu_opt_get(opts, "ipv6-net"); 1113 1114 if (ip6_net) { 1115 char *prefix_addr; 1116 unsigned long prefix_len = 64; /* Default 64bit prefix length. */ 1117 1118 substrings = g_strsplit(ip6_net, "/", 2); 1119 if (!substrings || !substrings[0]) { 1120 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "ipv6-net", 1121 "a valid IPv6 prefix"); 1122 goto out; 1123 } 1124 1125 prefix_addr = substrings[0]; 1126 1127 if (substrings[1]) { 1128 /* User-specified prefix length. */ 1129 int err; 1130 1131 err = qemu_strtoul(substrings[1], NULL, 10, &prefix_len); 1132 if (err) { 1133 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1134 "ipv6-prefixlen", "a number"); 1135 goto out; 1136 } 1137 } 1138 1139 qemu_opt_set(opts, "ipv6-prefix", prefix_addr, &error_abort); 1140 qemu_opt_set_number(opts, "ipv6-prefixlen", prefix_len, 1141 &error_abort); 1142 qemu_opt_unset(opts, "ipv6-net"); 1143 } 1144 } 1145 1146 if (is_netdev) { 1147 visit_type_Netdev(v, NULL, (Netdev **)&object, &err); 1148 } else { 1149 visit_type_NetLegacy(v, NULL, (NetLegacy **)&object, &err); 1150 } 1151 1152 if (!err) { 1153 ret = net_client_init1(object, is_netdev, &err); 1154 } 1155 1156 if (is_netdev) { 1157 qapi_free_Netdev(object); 1158 } else { 1159 qapi_free_NetLegacy(object); 1160 } 1161 1162 out: 1163 error_propagate(errp, err); 1164 g_strfreev(substrings); 1165 visit_free(v); 1166 return ret; 1167 } 1168 1169 void netdev_add(QemuOpts *opts, Error **errp) 1170 { 1171 net_client_init(opts, true, errp); 1172 } 1173 1174 void qmp_netdev_add(QDict *qdict, QObject **ret, Error **errp) 1175 { 1176 Error *local_err = NULL; 1177 QemuOptsList *opts_list; 1178 QemuOpts *opts; 1179 1180 opts_list = qemu_find_opts_err("netdev", &local_err); 1181 if (local_err) { 1182 goto out; 1183 } 1184 1185 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err); 1186 if (local_err) { 1187 goto out; 1188 } 1189 1190 netdev_add(opts, &local_err); 1191 if (local_err) { 1192 qemu_opts_del(opts); 1193 goto out; 1194 } 1195 1196 out: 1197 error_propagate(errp, local_err); 1198 } 1199 1200 void qmp_netdev_del(const char *id, Error **errp) 1201 { 1202 NetClientState *nc; 1203 QemuOpts *opts; 1204 1205 nc = qemu_find_netdev(id); 1206 if (!nc) { 1207 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1208 "Device '%s' not found", id); 1209 return; 1210 } 1211 1212 opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id); 1213 if (!opts) { 1214 error_setg(errp, "Device '%s' is not a netdev", id); 1215 return; 1216 } 1217 1218 qemu_del_net_client(nc); 1219 qemu_opts_del(opts); 1220 } 1221 1222 static void netfilter_print_info(Monitor *mon, NetFilterState *nf) 1223 { 1224 char *str; 1225 ObjectProperty *prop; 1226 ObjectPropertyIterator iter; 1227 Visitor *v; 1228 1229 /* generate info str */ 1230 object_property_iter_init(&iter, OBJECT(nf)); 1231 while ((prop = object_property_iter_next(&iter))) { 1232 if (!strcmp(prop->name, "type")) { 1233 continue; 1234 } 1235 v = string_output_visitor_new(false, &str); 1236 object_property_get(OBJECT(nf), v, prop->name, NULL); 1237 visit_complete(v, &str); 1238 visit_free(v); 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 NetClientDriver_str(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_DRIVER_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 NetClientDriver 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_DRIVER_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_DRIVER_NIC) { 1344 monitor_printf(mon, " \\ "); 1345 print_net_client(mon, peer); 1346 } 1347 } 1348 } 1349 1350 void colo_notify_filters_event(int event, Error **errp) 1351 { 1352 NetClientState *nc; 1353 NetFilterState *nf; 1354 NetFilterClass *nfc = NULL; 1355 Error *local_err = NULL; 1356 1357 QTAILQ_FOREACH(nc, &net_clients, next) { 1358 QTAILQ_FOREACH(nf, &nc->filters, next) { 1359 nfc = NETFILTER_GET_CLASS(OBJECT(nf)); 1360 nfc->handle_event(nf, event, &local_err); 1361 if (local_err) { 1362 error_propagate(errp, local_err); 1363 return; 1364 } 1365 } 1366 } 1367 } 1368 1369 void qmp_set_link(const char *name, bool up, Error **errp) 1370 { 1371 NetClientState *ncs[MAX_QUEUE_NUM]; 1372 NetClientState *nc; 1373 int queues, i; 1374 1375 queues = qemu_find_net_clients_except(name, ncs, 1376 NET_CLIENT_DRIVER__MAX, 1377 MAX_QUEUE_NUM); 1378 1379 if (queues == 0) { 1380 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1381 "Device '%s' not found", name); 1382 return; 1383 } 1384 nc = ncs[0]; 1385 1386 for (i = 0; i < queues; i++) { 1387 ncs[i]->link_down = !up; 1388 } 1389 1390 if (nc->info->link_status_changed) { 1391 nc->info->link_status_changed(nc); 1392 } 1393 1394 if (nc->peer) { 1395 /* Change peer link only if the peer is NIC and then notify peer. 1396 * If the peer is a HUBPORT or a backend, we do not change the 1397 * link status. 1398 * 1399 * This behavior is compatible with qemu hubs where there could be 1400 * multiple clients that can still communicate with each other in 1401 * disconnected mode. For now maintain this compatibility. 1402 */ 1403 if (nc->peer->info->type == NET_CLIENT_DRIVER_NIC) { 1404 for (i = 0; i < queues; i++) { 1405 ncs[i]->peer->link_down = !up; 1406 } 1407 } 1408 if (nc->peer->info->link_status_changed) { 1409 nc->peer->info->link_status_changed(nc->peer); 1410 } 1411 } 1412 } 1413 1414 static void net_vm_change_state_handler(void *opaque, int running, 1415 RunState state) 1416 { 1417 NetClientState *nc; 1418 NetClientState *tmp; 1419 1420 QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) { 1421 if (running) { 1422 /* Flush queued packets and wake up backends. */ 1423 if (nc->peer && qemu_can_send_packet(nc)) { 1424 qemu_flush_queued_packets(nc->peer); 1425 } 1426 } else { 1427 /* Complete all queued packets, to guarantee we don't modify 1428 * state later when VM is not running. 1429 */ 1430 qemu_flush_or_purge_queued_packets(nc, true); 1431 } 1432 } 1433 } 1434 1435 void net_cleanup(void) 1436 { 1437 NetClientState *nc; 1438 1439 /* We may del multiple entries during qemu_del_net_client(), 1440 * so QTAILQ_FOREACH_SAFE() is also not safe here. 1441 */ 1442 while (!QTAILQ_EMPTY(&net_clients)) { 1443 nc = QTAILQ_FIRST(&net_clients); 1444 if (nc->info->type == NET_CLIENT_DRIVER_NIC) { 1445 qemu_del_nic(qemu_get_nic(nc)); 1446 } else { 1447 qemu_del_net_client(nc); 1448 } 1449 } 1450 1451 qemu_del_vm_change_state_handler(net_change_state_entry); 1452 } 1453 1454 void net_check_clients(void) 1455 { 1456 NetClientState *nc; 1457 int i; 1458 1459 net_hub_check_clients(); 1460 1461 QTAILQ_FOREACH(nc, &net_clients, next) { 1462 if (!nc->peer) { 1463 warn_report("%s %s has no peer", 1464 nc->info->type == NET_CLIENT_DRIVER_NIC 1465 ? "nic" : "netdev", 1466 nc->name); 1467 } 1468 } 1469 1470 /* Check that all NICs requested via -net nic actually got created. 1471 * NICs created via -device don't need to be checked here because 1472 * they are always instantiated. 1473 */ 1474 for (i = 0; i < MAX_NICS; i++) { 1475 NICInfo *nd = &nd_table[i]; 1476 if (nd->used && !nd->instantiated) { 1477 warn_report("requested NIC (%s, model %s) " 1478 "was not created (not supported by this machine?)", 1479 nd->name ? nd->name : "anonymous", 1480 nd->model ? nd->model : "unspecified"); 1481 } 1482 } 1483 } 1484 1485 static int net_init_client(void *dummy, QemuOpts *opts, Error **errp) 1486 { 1487 return net_client_init(opts, false, errp); 1488 } 1489 1490 static int net_init_netdev(void *dummy, QemuOpts *opts, Error **errp) 1491 { 1492 return net_client_init(opts, true, errp); 1493 } 1494 1495 /* For the convenience "--nic" parameter */ 1496 static int net_param_nic(void *dummy, QemuOpts *opts, Error **errp) 1497 { 1498 char *mac, *nd_id; 1499 int idx, ret; 1500 NICInfo *ni; 1501 const char *type; 1502 1503 type = qemu_opt_get(opts, "type"); 1504 if (type && g_str_equal(type, "none")) { 1505 return 0; /* Nothing to do, default_net is cleared in vl.c */ 1506 } 1507 1508 idx = nic_get_free_idx(); 1509 if (idx == -1 || nb_nics >= MAX_NICS) { 1510 error_setg(errp, "no more on-board/default NIC slots available"); 1511 return -1; 1512 } 1513 1514 if (!type) { 1515 qemu_opt_set(opts, "type", "user", &error_abort); 1516 } 1517 1518 ni = &nd_table[idx]; 1519 memset(ni, 0, sizeof(*ni)); 1520 ni->model = qemu_opt_get_del(opts, "model"); 1521 1522 /* Create an ID if the user did not specify one */ 1523 nd_id = g_strdup(qemu_opts_id(opts)); 1524 if (!nd_id) { 1525 nd_id = g_strdup_printf("__org.qemu.nic%i\n", idx); 1526 qemu_opts_set_id(opts, nd_id); 1527 } 1528 1529 /* Handle MAC address */ 1530 mac = qemu_opt_get_del(opts, "mac"); 1531 if (mac) { 1532 ret = net_parse_macaddr(ni->macaddr.a, mac); 1533 g_free(mac); 1534 if (ret) { 1535 error_setg(errp, "invalid syntax for ethernet address"); 1536 goto out; 1537 } 1538 if (is_multicast_ether_addr(ni->macaddr.a)) { 1539 error_setg(errp, "NIC cannot have multicast MAC address"); 1540 ret = -1; 1541 goto out; 1542 } 1543 } 1544 qemu_macaddr_default_if_unset(&ni->macaddr); 1545 1546 ret = net_client_init(opts, true, errp); 1547 if (ret == 0) { 1548 ni->netdev = qemu_find_netdev(nd_id); 1549 ni->used = true; 1550 nb_nics++; 1551 } 1552 1553 out: 1554 g_free(nd_id); 1555 return ret; 1556 } 1557 1558 int net_init_clients(Error **errp) 1559 { 1560 net_change_state_entry = 1561 qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL); 1562 1563 QTAILQ_INIT(&net_clients); 1564 1565 if (qemu_opts_foreach(qemu_find_opts("netdev"), 1566 net_init_netdev, NULL, errp)) { 1567 return -1; 1568 } 1569 1570 if (qemu_opts_foreach(qemu_find_opts("nic"), net_param_nic, NULL, errp)) { 1571 return -1; 1572 } 1573 1574 if (qemu_opts_foreach(qemu_find_opts("net"), net_init_client, NULL, errp)) { 1575 return -1; 1576 } 1577 1578 return 0; 1579 } 1580 1581 int net_client_parse(QemuOptsList *opts_list, const char *optarg) 1582 { 1583 if (!qemu_opts_parse_noisily(opts_list, optarg, true)) { 1584 return -1; 1585 } 1586 1587 return 0; 1588 } 1589 1590 /* From FreeBSD */ 1591 /* XXX: optimize */ 1592 uint32_t net_crc32(const uint8_t *p, int len) 1593 { 1594 uint32_t crc; 1595 int carry, i, j; 1596 uint8_t b; 1597 1598 crc = 0xffffffff; 1599 for (i = 0; i < len; i++) { 1600 b = *p++; 1601 for (j = 0; j < 8; j++) { 1602 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01); 1603 crc <<= 1; 1604 b >>= 1; 1605 if (carry) { 1606 crc = ((crc ^ POLYNOMIAL_BE) | carry); 1607 } 1608 } 1609 } 1610 1611 return crc; 1612 } 1613 1614 uint32_t net_crc32_le(const uint8_t *p, int len) 1615 { 1616 uint32_t crc; 1617 int carry, i, j; 1618 uint8_t b; 1619 1620 crc = 0xffffffff; 1621 for (i = 0; i < len; i++) { 1622 b = *p++; 1623 for (j = 0; j < 8; j++) { 1624 carry = (crc & 0x1) ^ (b & 0x01); 1625 crc >>= 1; 1626 b >>= 1; 1627 if (carry) { 1628 crc ^= POLYNOMIAL_LE; 1629 } 1630 } 1631 } 1632 1633 return crc; 1634 } 1635 1636 QemuOptsList qemu_netdev_opts = { 1637 .name = "netdev", 1638 .implied_opt_name = "type", 1639 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head), 1640 .desc = { 1641 /* 1642 * no elements => accept any params 1643 * validation will happen later 1644 */ 1645 { /* end of list */ } 1646 }, 1647 }; 1648 1649 QemuOptsList qemu_nic_opts = { 1650 .name = "nic", 1651 .implied_opt_name = "type", 1652 .head = QTAILQ_HEAD_INITIALIZER(qemu_nic_opts.head), 1653 .desc = { 1654 /* 1655 * no elements => accept any params 1656 * validation will happen later 1657 */ 1658 { /* end of list */ } 1659 }, 1660 }; 1661 1662 QemuOptsList qemu_net_opts = { 1663 .name = "net", 1664 .implied_opt_name = "type", 1665 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head), 1666 .desc = { 1667 /* 1668 * no elements => accept any params 1669 * validation will happen later 1670 */ 1671 { /* end of list */ } 1672 }, 1673 }; 1674 1675 void net_socket_rs_init(SocketReadState *rs, 1676 SocketReadStateFinalize *finalize, 1677 bool vnet_hdr) 1678 { 1679 rs->state = 0; 1680 rs->vnet_hdr = vnet_hdr; 1681 rs->index = 0; 1682 rs->packet_len = 0; 1683 rs->vnet_hdr_len = 0; 1684 memset(rs->buf, 0, sizeof(rs->buf)); 1685 rs->finalize = finalize; 1686 } 1687 1688 /* 1689 * Returns 1690 * 0: success 1691 * -1: error occurs 1692 */ 1693 int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size) 1694 { 1695 unsigned int l; 1696 1697 while (size > 0) { 1698 /* Reassemble a packet from the network. 1699 * 0 = getting length. 1700 * 1 = getting vnet header length. 1701 * 2 = getting data. 1702 */ 1703 switch (rs->state) { 1704 case 0: 1705 l = 4 - rs->index; 1706 if (l > size) { 1707 l = size; 1708 } 1709 memcpy(rs->buf + rs->index, buf, l); 1710 buf += l; 1711 size -= l; 1712 rs->index += l; 1713 if (rs->index == 4) { 1714 /* got length */ 1715 rs->packet_len = ntohl(*(uint32_t *)rs->buf); 1716 rs->index = 0; 1717 if (rs->vnet_hdr) { 1718 rs->state = 1; 1719 } else { 1720 rs->state = 2; 1721 rs->vnet_hdr_len = 0; 1722 } 1723 } 1724 break; 1725 case 1: 1726 l = 4 - rs->index; 1727 if (l > size) { 1728 l = size; 1729 } 1730 memcpy(rs->buf + rs->index, buf, l); 1731 buf += l; 1732 size -= l; 1733 rs->index += l; 1734 if (rs->index == 4) { 1735 /* got vnet header length */ 1736 rs->vnet_hdr_len = ntohl(*(uint32_t *)rs->buf); 1737 rs->index = 0; 1738 rs->state = 2; 1739 } 1740 break; 1741 case 2: 1742 l = rs->packet_len - rs->index; 1743 if (l > size) { 1744 l = size; 1745 } 1746 if (rs->index + l <= sizeof(rs->buf)) { 1747 memcpy(rs->buf + rs->index, buf, l); 1748 } else { 1749 fprintf(stderr, "serious error: oversized packet received," 1750 "connection terminated.\n"); 1751 rs->index = rs->state = 0; 1752 return -1; 1753 } 1754 1755 rs->index += l; 1756 buf += l; 1757 size -= l; 1758 if (rs->index >= rs->packet_len) { 1759 rs->index = 0; 1760 rs->state = 0; 1761 assert(rs->finalize); 1762 rs->finalize(rs); 1763 } 1764 break; 1765 } 1766 } 1767 1768 assert(size == 0); 1769 return 0; 1770 } 1771