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 "hw/qdev-properties.h" 31 #include "net/slirp.h" 32 #include "net/eth.h" 33 #include "util.h" 34 35 #include "monitor/monitor.h" 36 #include "qemu/help_option.h" 37 #include "qapi/qapi-commands-net.h" 38 #include "qapi/qapi-visit-net.h" 39 #include "qapi/qmp/qdict.h" 40 #include "qapi/qmp/qerror.h" 41 #include "qemu/error-report.h" 42 #include "qemu/sockets.h" 43 #include "qemu/cutils.h" 44 #include "qemu/config-file.h" 45 #include "qemu/ctype.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 "sysemu/runstate.h" 54 #include "sysemu/sysemu.h" 55 #include "net/filter.h" 56 #include "qapi/string-output-visitor.h" 57 58 /* Net bridge is currently not supported for W32. */ 59 #if !defined(_WIN32) 60 # define CONFIG_NET_BRIDGE 61 #endif 62 63 static VMChangeStateEntry *net_change_state_entry; 64 static QTAILQ_HEAD(, NetClientState) net_clients; 65 66 /***********************************************************/ 67 /* network device redirectors */ 68 69 int parse_host_port(struct sockaddr_in *saddr, const char *str, 70 Error **errp) 71 { 72 gchar **substrings; 73 struct hostent *he; 74 const char *addr, *p, *r; 75 int port, ret = 0; 76 77 substrings = g_strsplit(str, ":", 2); 78 if (!substrings || !substrings[0] || !substrings[1]) { 79 error_setg(errp, "host address '%s' doesn't contain ':' " 80 "separating host from port", str); 81 ret = -1; 82 goto out; 83 } 84 85 addr = substrings[0]; 86 p = substrings[1]; 87 88 saddr->sin_family = AF_INET; 89 if (addr[0] == '\0') { 90 saddr->sin_addr.s_addr = 0; 91 } else { 92 if (qemu_isdigit(addr[0])) { 93 if (!inet_aton(addr, &saddr->sin_addr)) { 94 error_setg(errp, "host address '%s' is not a valid " 95 "IPv4 address", addr); 96 ret = -1; 97 goto out; 98 } 99 } else { 100 he = gethostbyname(addr); 101 if (he == NULL) { 102 error_setg(errp, "can't resolve host address '%s'", addr); 103 ret = -1; 104 goto out; 105 } 106 saddr->sin_addr = *(struct in_addr *)he->h_addr; 107 } 108 } 109 port = strtol(p, (char **)&r, 0); 110 if (r == p) { 111 error_setg(errp, "port number '%s' is invalid", p); 112 ret = -1; 113 goto out; 114 } 115 saddr->sin_port = htons(port); 116 117 out: 118 g_strfreev(substrings); 119 return ret; 120 } 121 122 char *qemu_mac_strdup_printf(const uint8_t *macaddr) 123 { 124 return g_strdup_printf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x", 125 macaddr[0], macaddr[1], macaddr[2], 126 macaddr[3], macaddr[4], macaddr[5]); 127 } 128 129 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]) 130 { 131 snprintf(nc->info_str, sizeof(nc->info_str), 132 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x", 133 nc->model, 134 macaddr[0], macaddr[1], macaddr[2], 135 macaddr[3], macaddr[4], macaddr[5]); 136 } 137 138 static int mac_table[256] = {0}; 139 140 static void qemu_macaddr_set_used(MACAddr *macaddr) 141 { 142 int index; 143 144 for (index = 0x56; index < 0xFF; index++) { 145 if (macaddr->a[5] == index) { 146 mac_table[index]++; 147 } 148 } 149 } 150 151 static void qemu_macaddr_set_free(MACAddr *macaddr) 152 { 153 int index; 154 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } }; 155 156 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) { 157 return; 158 } 159 for (index = 0x56; index < 0xFF; index++) { 160 if (macaddr->a[5] == index) { 161 mac_table[index]--; 162 } 163 } 164 } 165 166 static int qemu_macaddr_get_free(void) 167 { 168 int index; 169 170 for (index = 0x56; index < 0xFF; index++) { 171 if (mac_table[index] == 0) { 172 return index; 173 } 174 } 175 176 return -1; 177 } 178 179 void qemu_macaddr_default_if_unset(MACAddr *macaddr) 180 { 181 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } }; 182 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } }; 183 184 if (memcmp(macaddr, &zero, sizeof(zero)) != 0) { 185 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) { 186 return; 187 } else { 188 qemu_macaddr_set_used(macaddr); 189 return; 190 } 191 } 192 193 macaddr->a[0] = 0x52; 194 macaddr->a[1] = 0x54; 195 macaddr->a[2] = 0x00; 196 macaddr->a[3] = 0x12; 197 macaddr->a[4] = 0x34; 198 macaddr->a[5] = qemu_macaddr_get_free(); 199 qemu_macaddr_set_used(macaddr); 200 } 201 202 /** 203 * Generate a name for net client 204 * 205 * Only net clients created with the legacy -net option and NICs need this. 206 */ 207 static char *assign_name(NetClientState *nc1, const char *model) 208 { 209 NetClientState *nc; 210 int id = 0; 211 212 QTAILQ_FOREACH(nc, &net_clients, next) { 213 if (nc == nc1) { 214 continue; 215 } 216 if (strcmp(nc->model, model) == 0) { 217 id++; 218 } 219 } 220 221 return g_strdup_printf("%s.%d", model, id); 222 } 223 224 static void qemu_net_client_destructor(NetClientState *nc) 225 { 226 g_free(nc); 227 } 228 static ssize_t qemu_deliver_packet_iov(NetClientState *sender, 229 unsigned flags, 230 const struct iovec *iov, 231 int iovcnt, 232 void *opaque); 233 234 static void qemu_net_client_setup(NetClientState *nc, 235 NetClientInfo *info, 236 NetClientState *peer, 237 const char *model, 238 const char *name, 239 NetClientDestructor *destructor) 240 { 241 nc->info = info; 242 nc->model = g_strdup(model); 243 if (name) { 244 nc->name = g_strdup(name); 245 } else { 246 nc->name = assign_name(nc, model); 247 } 248 249 if (peer) { 250 assert(!peer->peer); 251 nc->peer = peer; 252 peer->peer = nc; 253 } 254 QTAILQ_INSERT_TAIL(&net_clients, nc, next); 255 256 nc->incoming_queue = qemu_new_net_queue(qemu_deliver_packet_iov, nc); 257 nc->destructor = destructor; 258 QTAILQ_INIT(&nc->filters); 259 } 260 261 NetClientState *qemu_new_net_client(NetClientInfo *info, 262 NetClientState *peer, 263 const char *model, 264 const char *name) 265 { 266 NetClientState *nc; 267 268 assert(info->size >= sizeof(NetClientState)); 269 270 nc = g_malloc0(info->size); 271 qemu_net_client_setup(nc, info, peer, model, name, 272 qemu_net_client_destructor); 273 274 return nc; 275 } 276 277 NICState *qemu_new_nic(NetClientInfo *info, 278 NICConf *conf, 279 const char *model, 280 const char *name, 281 void *opaque) 282 { 283 NetClientState **peers = conf->peers.ncs; 284 NICState *nic; 285 int i, queues = MAX(1, conf->peers.queues); 286 287 assert(info->type == NET_CLIENT_DRIVER_NIC); 288 assert(info->size >= sizeof(NICState)); 289 290 nic = g_malloc0(info->size + sizeof(NetClientState) * queues); 291 nic->ncs = (void *)nic + info->size; 292 nic->conf = conf; 293 nic->opaque = opaque; 294 295 for (i = 0; i < queues; i++) { 296 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name, 297 NULL); 298 nic->ncs[i].queue_index = i; 299 } 300 301 return nic; 302 } 303 304 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index) 305 { 306 return nic->ncs + queue_index; 307 } 308 309 NetClientState *qemu_get_queue(NICState *nic) 310 { 311 return qemu_get_subqueue(nic, 0); 312 } 313 314 NICState *qemu_get_nic(NetClientState *nc) 315 { 316 NetClientState *nc0 = nc - nc->queue_index; 317 318 return (NICState *)((void *)nc0 - nc->info->size); 319 } 320 321 void *qemu_get_nic_opaque(NetClientState *nc) 322 { 323 NICState *nic = qemu_get_nic(nc); 324 325 return nic->opaque; 326 } 327 328 static void qemu_cleanup_net_client(NetClientState *nc) 329 { 330 QTAILQ_REMOVE(&net_clients, nc, next); 331 332 if (nc->info->cleanup) { 333 nc->info->cleanup(nc); 334 } 335 } 336 337 static void qemu_free_net_client(NetClientState *nc) 338 { 339 if (nc->incoming_queue) { 340 qemu_del_net_queue(nc->incoming_queue); 341 } 342 if (nc->peer) { 343 nc->peer->peer = NULL; 344 } 345 g_free(nc->name); 346 g_free(nc->model); 347 if (nc->destructor) { 348 nc->destructor(nc); 349 } 350 } 351 352 void qemu_del_net_client(NetClientState *nc) 353 { 354 NetClientState *ncs[MAX_QUEUE_NUM]; 355 int queues, i; 356 NetFilterState *nf, *next; 357 358 assert(nc->info->type != NET_CLIENT_DRIVER_NIC); 359 360 /* If the NetClientState belongs to a multiqueue backend, we will change all 361 * other NetClientStates also. 362 */ 363 queues = qemu_find_net_clients_except(nc->name, ncs, 364 NET_CLIENT_DRIVER_NIC, 365 MAX_QUEUE_NUM); 366 assert(queues != 0); 367 368 QTAILQ_FOREACH_SAFE(nf, &nc->filters, next, next) { 369 object_unparent(OBJECT(nf)); 370 } 371 372 /* If there is a peer NIC, delete and cleanup client, but do not free. */ 373 if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_NIC) { 374 NICState *nic = qemu_get_nic(nc->peer); 375 if (nic->peer_deleted) { 376 return; 377 } 378 nic->peer_deleted = true; 379 380 for (i = 0; i < queues; i++) { 381 ncs[i]->peer->link_down = true; 382 } 383 384 if (nc->peer->info->link_status_changed) { 385 nc->peer->info->link_status_changed(nc->peer); 386 } 387 388 for (i = 0; i < queues; i++) { 389 qemu_cleanup_net_client(ncs[i]); 390 } 391 392 return; 393 } 394 395 for (i = 0; i < queues; i++) { 396 qemu_cleanup_net_client(ncs[i]); 397 qemu_free_net_client(ncs[i]); 398 } 399 } 400 401 void qemu_del_nic(NICState *nic) 402 { 403 int i, queues = MAX(nic->conf->peers.queues, 1); 404 405 qemu_macaddr_set_free(&nic->conf->macaddr); 406 407 /* If this is a peer NIC and peer has already been deleted, free it now. */ 408 if (nic->peer_deleted) { 409 for (i = 0; i < queues; i++) { 410 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer); 411 } 412 } 413 414 for (i = queues - 1; i >= 0; i--) { 415 NetClientState *nc = qemu_get_subqueue(nic, i); 416 417 qemu_cleanup_net_client(nc); 418 qemu_free_net_client(nc); 419 } 420 421 g_free(nic); 422 } 423 424 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque) 425 { 426 NetClientState *nc; 427 428 QTAILQ_FOREACH(nc, &net_clients, next) { 429 if (nc->info->type == NET_CLIENT_DRIVER_NIC) { 430 if (nc->queue_index == 0) { 431 func(qemu_get_nic(nc), opaque); 432 } 433 } 434 } 435 } 436 437 bool qemu_has_ufo(NetClientState *nc) 438 { 439 if (!nc || !nc->info->has_ufo) { 440 return false; 441 } 442 443 return nc->info->has_ufo(nc); 444 } 445 446 bool qemu_has_vnet_hdr(NetClientState *nc) 447 { 448 if (!nc || !nc->info->has_vnet_hdr) { 449 return false; 450 } 451 452 return nc->info->has_vnet_hdr(nc); 453 } 454 455 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len) 456 { 457 if (!nc || !nc->info->has_vnet_hdr_len) { 458 return false; 459 } 460 461 return nc->info->has_vnet_hdr_len(nc, len); 462 } 463 464 void qemu_using_vnet_hdr(NetClientState *nc, bool enable) 465 { 466 if (!nc || !nc->info->using_vnet_hdr) { 467 return; 468 } 469 470 nc->info->using_vnet_hdr(nc, enable); 471 } 472 473 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6, 474 int ecn, int ufo) 475 { 476 if (!nc || !nc->info->set_offload) { 477 return; 478 } 479 480 nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo); 481 } 482 483 void qemu_set_vnet_hdr_len(NetClientState *nc, int len) 484 { 485 if (!nc || !nc->info->set_vnet_hdr_len) { 486 return; 487 } 488 489 nc->vnet_hdr_len = len; 490 nc->info->set_vnet_hdr_len(nc, len); 491 } 492 493 int qemu_set_vnet_le(NetClientState *nc, bool is_le) 494 { 495 #ifdef HOST_WORDS_BIGENDIAN 496 if (!nc || !nc->info->set_vnet_le) { 497 return -ENOSYS; 498 } 499 500 return nc->info->set_vnet_le(nc, is_le); 501 #else 502 return 0; 503 #endif 504 } 505 506 int qemu_set_vnet_be(NetClientState *nc, bool is_be) 507 { 508 #ifdef HOST_WORDS_BIGENDIAN 509 return 0; 510 #else 511 if (!nc || !nc->info->set_vnet_be) { 512 return -ENOSYS; 513 } 514 515 return nc->info->set_vnet_be(nc, is_be); 516 #endif 517 } 518 519 int qemu_can_send_packet(NetClientState *sender) 520 { 521 int vm_running = runstate_is_running(); 522 523 if (!vm_running) { 524 return 0; 525 } 526 527 if (!sender->peer) { 528 return 1; 529 } 530 531 if (sender->peer->receive_disabled) { 532 return 0; 533 } else if (sender->peer->info->can_receive && 534 !sender->peer->info->can_receive(sender->peer)) { 535 return 0; 536 } 537 return 1; 538 } 539 540 static ssize_t filter_receive_iov(NetClientState *nc, 541 NetFilterDirection direction, 542 NetClientState *sender, 543 unsigned flags, 544 const struct iovec *iov, 545 int iovcnt, 546 NetPacketSent *sent_cb) 547 { 548 ssize_t ret = 0; 549 NetFilterState *nf = NULL; 550 551 if (direction == NET_FILTER_DIRECTION_TX) { 552 QTAILQ_FOREACH(nf, &nc->filters, next) { 553 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov, 554 iovcnt, sent_cb); 555 if (ret) { 556 return ret; 557 } 558 } 559 } else { 560 QTAILQ_FOREACH_REVERSE(nf, &nc->filters, next) { 561 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov, 562 iovcnt, sent_cb); 563 if (ret) { 564 return ret; 565 } 566 } 567 } 568 569 return ret; 570 } 571 572 static ssize_t filter_receive(NetClientState *nc, 573 NetFilterDirection direction, 574 NetClientState *sender, 575 unsigned flags, 576 const uint8_t *data, 577 size_t size, 578 NetPacketSent *sent_cb) 579 { 580 struct iovec iov = { 581 .iov_base = (void *)data, 582 .iov_len = size 583 }; 584 585 return filter_receive_iov(nc, direction, sender, flags, &iov, 1, sent_cb); 586 } 587 588 void qemu_purge_queued_packets(NetClientState *nc) 589 { 590 if (!nc->peer) { 591 return; 592 } 593 594 qemu_net_queue_purge(nc->peer->incoming_queue, nc); 595 } 596 597 void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge) 598 { 599 nc->receive_disabled = 0; 600 601 if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_HUBPORT) { 602 if (net_hub_flush(nc->peer)) { 603 qemu_notify_event(); 604 } 605 } 606 if (qemu_net_queue_flush(nc->incoming_queue)) { 607 /* We emptied the queue successfully, signal to the IO thread to repoll 608 * the file descriptor (for tap, for example). 609 */ 610 qemu_notify_event(); 611 } else if (purge) { 612 /* Unable to empty the queue, purge remaining packets */ 613 qemu_net_queue_purge(nc->incoming_queue, nc); 614 } 615 } 616 617 void qemu_flush_queued_packets(NetClientState *nc) 618 { 619 qemu_flush_or_purge_queued_packets(nc, false); 620 } 621 622 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender, 623 unsigned flags, 624 const uint8_t *buf, int size, 625 NetPacketSent *sent_cb) 626 { 627 NetQueue *queue; 628 int ret; 629 630 #ifdef DEBUG_NET 631 printf("qemu_send_packet_async:\n"); 632 qemu_hexdump((const char *)buf, stdout, "net", size); 633 #endif 634 635 if (sender->link_down || !sender->peer) { 636 return size; 637 } 638 639 /* Let filters handle the packet first */ 640 ret = filter_receive(sender, NET_FILTER_DIRECTION_TX, 641 sender, flags, buf, size, sent_cb); 642 if (ret) { 643 return ret; 644 } 645 646 ret = filter_receive(sender->peer, NET_FILTER_DIRECTION_RX, 647 sender, flags, buf, size, sent_cb); 648 if (ret) { 649 return ret; 650 } 651 652 queue = sender->peer->incoming_queue; 653 654 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb); 655 } 656 657 ssize_t qemu_send_packet_async(NetClientState *sender, 658 const uint8_t *buf, int size, 659 NetPacketSent *sent_cb) 660 { 661 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE, 662 buf, size, sent_cb); 663 } 664 665 ssize_t qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size) 666 { 667 return qemu_send_packet_async(nc, buf, size, NULL); 668 } 669 670 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size) 671 { 672 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW, 673 buf, size, NULL); 674 } 675 676 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov, 677 int iovcnt, unsigned flags) 678 { 679 uint8_t *buf = NULL; 680 uint8_t *buffer; 681 size_t offset; 682 ssize_t ret; 683 684 if (iovcnt == 1) { 685 buffer = iov[0].iov_base; 686 offset = iov[0].iov_len; 687 } else { 688 offset = iov_size(iov, iovcnt); 689 if (offset > NET_BUFSIZE) { 690 return -1; 691 } 692 buf = g_malloc(offset); 693 buffer = buf; 694 offset = iov_to_buf(iov, iovcnt, 0, buf, offset); 695 } 696 697 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) { 698 ret = nc->info->receive_raw(nc, buffer, offset); 699 } else { 700 ret = nc->info->receive(nc, buffer, offset); 701 } 702 703 g_free(buf); 704 return ret; 705 } 706 707 static ssize_t qemu_deliver_packet_iov(NetClientState *sender, 708 unsigned flags, 709 const struct iovec *iov, 710 int iovcnt, 711 void *opaque) 712 { 713 NetClientState *nc = opaque; 714 int ret; 715 716 717 if (nc->link_down) { 718 return iov_size(iov, iovcnt); 719 } 720 721 if (nc->receive_disabled) { 722 return 0; 723 } 724 725 if (nc->info->receive_iov && !(flags & QEMU_NET_PACKET_FLAG_RAW)) { 726 ret = nc->info->receive_iov(nc, iov, iovcnt); 727 } else { 728 ret = nc_sendv_compat(nc, iov, iovcnt, flags); 729 } 730 731 if (ret == 0) { 732 nc->receive_disabled = 1; 733 } 734 735 return ret; 736 } 737 738 ssize_t qemu_sendv_packet_async(NetClientState *sender, 739 const struct iovec *iov, int iovcnt, 740 NetPacketSent *sent_cb) 741 { 742 NetQueue *queue; 743 size_t size = iov_size(iov, iovcnt); 744 int ret; 745 746 if (size > NET_BUFSIZE) { 747 return size; 748 } 749 750 if (sender->link_down || !sender->peer) { 751 return size; 752 } 753 754 /* Let filters handle the packet first */ 755 ret = filter_receive_iov(sender, NET_FILTER_DIRECTION_TX, sender, 756 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb); 757 if (ret) { 758 return ret; 759 } 760 761 ret = filter_receive_iov(sender->peer, NET_FILTER_DIRECTION_RX, sender, 762 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb); 763 if (ret) { 764 return ret; 765 } 766 767 queue = sender->peer->incoming_queue; 768 769 return qemu_net_queue_send_iov(queue, sender, 770 QEMU_NET_PACKET_FLAG_NONE, 771 iov, iovcnt, sent_cb); 772 } 773 774 ssize_t 775 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt) 776 { 777 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL); 778 } 779 780 NetClientState *qemu_find_netdev(const char *id) 781 { 782 NetClientState *nc; 783 784 QTAILQ_FOREACH(nc, &net_clients, next) { 785 if (nc->info->type == NET_CLIENT_DRIVER_NIC) 786 continue; 787 if (!strcmp(nc->name, id)) { 788 return nc; 789 } 790 } 791 792 return NULL; 793 } 794 795 int qemu_find_net_clients_except(const char *id, NetClientState **ncs, 796 NetClientDriver type, int max) 797 { 798 NetClientState *nc; 799 int ret = 0; 800 801 QTAILQ_FOREACH(nc, &net_clients, next) { 802 if (nc->info->type == type) { 803 continue; 804 } 805 if (!id || !strcmp(nc->name, id)) { 806 if (ret < max) { 807 ncs[ret] = nc; 808 } 809 ret++; 810 } 811 } 812 813 return ret; 814 } 815 816 static int nic_get_free_idx(void) 817 { 818 int index; 819 820 for (index = 0; index < MAX_NICS; index++) 821 if (!nd_table[index].used) 822 return index; 823 return -1; 824 } 825 826 int qemu_show_nic_models(const char *arg, const char *const *models) 827 { 828 int i; 829 830 if (!arg || !is_help_option(arg)) { 831 return 0; 832 } 833 834 printf("Supported NIC models:\n"); 835 for (i = 0 ; models[i]; i++) { 836 printf("%s\n", models[i]); 837 } 838 return 1; 839 } 840 841 void qemu_check_nic_model(NICInfo *nd, const char *model) 842 { 843 const char *models[2]; 844 845 models[0] = model; 846 models[1] = NULL; 847 848 if (qemu_show_nic_models(nd->model, models)) 849 exit(0); 850 if (qemu_find_nic_model(nd, models, model) < 0) 851 exit(1); 852 } 853 854 int qemu_find_nic_model(NICInfo *nd, const char * const *models, 855 const char *default_model) 856 { 857 int i; 858 859 if (!nd->model) 860 nd->model = g_strdup(default_model); 861 862 for (i = 0 ; models[i]; i++) { 863 if (strcmp(nd->model, models[i]) == 0) 864 return i; 865 } 866 867 error_report("Unsupported NIC model: %s", nd->model); 868 return -1; 869 } 870 871 static int net_init_nic(const Netdev *netdev, const char *name, 872 NetClientState *peer, Error **errp) 873 { 874 int idx; 875 NICInfo *nd; 876 const NetLegacyNicOptions *nic; 877 878 assert(netdev->type == NET_CLIENT_DRIVER_NIC); 879 nic = &netdev->u.nic; 880 881 idx = nic_get_free_idx(); 882 if (idx == -1 || nb_nics >= MAX_NICS) { 883 error_setg(errp, "too many NICs"); 884 return -1; 885 } 886 887 nd = &nd_table[idx]; 888 889 memset(nd, 0, sizeof(*nd)); 890 891 if (nic->has_netdev) { 892 nd->netdev = qemu_find_netdev(nic->netdev); 893 if (!nd->netdev) { 894 error_setg(errp, "netdev '%s' not found", nic->netdev); 895 return -1; 896 } 897 } else { 898 assert(peer); 899 nd->netdev = peer; 900 } 901 nd->name = g_strdup(name); 902 if (nic->has_model) { 903 nd->model = g_strdup(nic->model); 904 } 905 if (nic->has_addr) { 906 nd->devaddr = g_strdup(nic->addr); 907 } 908 909 if (nic->has_macaddr && 910 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) { 911 error_setg(errp, "invalid syntax for ethernet address"); 912 return -1; 913 } 914 if (nic->has_macaddr && 915 is_multicast_ether_addr(nd->macaddr.a)) { 916 error_setg(errp, 917 "NIC cannot have multicast MAC address (odd 1st byte)"); 918 return -1; 919 } 920 qemu_macaddr_default_if_unset(&nd->macaddr); 921 922 if (nic->has_vectors) { 923 if (nic->vectors > 0x7ffffff) { 924 error_setg(errp, "invalid # of vectors: %"PRIu32, nic->vectors); 925 return -1; 926 } 927 nd->nvectors = nic->vectors; 928 } else { 929 nd->nvectors = DEV_NVECTORS_UNSPECIFIED; 930 } 931 932 nd->used = 1; 933 nb_nics++; 934 935 return idx; 936 } 937 938 939 static int (* const net_client_init_fun[NET_CLIENT_DRIVER__MAX])( 940 const Netdev *netdev, 941 const char *name, 942 NetClientState *peer, Error **errp) = { 943 [NET_CLIENT_DRIVER_NIC] = net_init_nic, 944 #ifdef CONFIG_SLIRP 945 [NET_CLIENT_DRIVER_USER] = net_init_slirp, 946 #endif 947 [NET_CLIENT_DRIVER_TAP] = net_init_tap, 948 [NET_CLIENT_DRIVER_SOCKET] = net_init_socket, 949 #ifdef CONFIG_VDE 950 [NET_CLIENT_DRIVER_VDE] = net_init_vde, 951 #endif 952 #ifdef CONFIG_NETMAP 953 [NET_CLIENT_DRIVER_NETMAP] = net_init_netmap, 954 #endif 955 #ifdef CONFIG_NET_BRIDGE 956 [NET_CLIENT_DRIVER_BRIDGE] = net_init_bridge, 957 #endif 958 [NET_CLIENT_DRIVER_HUBPORT] = net_init_hubport, 959 #ifdef CONFIG_VHOST_NET_USER 960 [NET_CLIENT_DRIVER_VHOST_USER] = net_init_vhost_user, 961 #endif 962 #ifdef CONFIG_L2TPV3 963 [NET_CLIENT_DRIVER_L2TPV3] = net_init_l2tpv3, 964 #endif 965 }; 966 967 968 static int net_client_init1(const void *object, bool is_netdev, Error **errp) 969 { 970 Netdev legacy = {0}; 971 const Netdev *netdev; 972 const char *name; 973 NetClientState *peer = NULL; 974 975 if (is_netdev) { 976 netdev = object; 977 name = netdev->id; 978 979 if (netdev->type == NET_CLIENT_DRIVER_NIC || 980 !net_client_init_fun[netdev->type]) { 981 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type", 982 "a netdev backend type"); 983 return -1; 984 } 985 } else { 986 const NetLegacy *net = object; 987 const NetLegacyOptions *opts = net->opts; 988 legacy.id = net->id; 989 netdev = &legacy; 990 /* missing optional values have been initialized to "all bits zero" */ 991 name = net->has_id ? net->id : net->name; 992 993 if (net->has_name) { 994 warn_report("The 'name' parameter is deprecated, use 'id' instead"); 995 } 996 997 /* Map the old options to the new flat type */ 998 switch (opts->type) { 999 case NET_LEGACY_OPTIONS_TYPE_NONE: 1000 return 0; /* nothing to do */ 1001 case NET_LEGACY_OPTIONS_TYPE_NIC: 1002 legacy.type = NET_CLIENT_DRIVER_NIC; 1003 legacy.u.nic = opts->u.nic; 1004 break; 1005 case NET_LEGACY_OPTIONS_TYPE_USER: 1006 legacy.type = NET_CLIENT_DRIVER_USER; 1007 legacy.u.user = opts->u.user; 1008 break; 1009 case NET_LEGACY_OPTIONS_TYPE_TAP: 1010 legacy.type = NET_CLIENT_DRIVER_TAP; 1011 legacy.u.tap = opts->u.tap; 1012 break; 1013 case NET_LEGACY_OPTIONS_TYPE_L2TPV3: 1014 legacy.type = NET_CLIENT_DRIVER_L2TPV3; 1015 legacy.u.l2tpv3 = opts->u.l2tpv3; 1016 break; 1017 case NET_LEGACY_OPTIONS_TYPE_SOCKET: 1018 legacy.type = NET_CLIENT_DRIVER_SOCKET; 1019 legacy.u.socket = opts->u.socket; 1020 break; 1021 case NET_LEGACY_OPTIONS_TYPE_VDE: 1022 legacy.type = NET_CLIENT_DRIVER_VDE; 1023 legacy.u.vde = opts->u.vde; 1024 break; 1025 case NET_LEGACY_OPTIONS_TYPE_BRIDGE: 1026 legacy.type = NET_CLIENT_DRIVER_BRIDGE; 1027 legacy.u.bridge = opts->u.bridge; 1028 break; 1029 case NET_LEGACY_OPTIONS_TYPE_NETMAP: 1030 legacy.type = NET_CLIENT_DRIVER_NETMAP; 1031 legacy.u.netmap = opts->u.netmap; 1032 break; 1033 case NET_LEGACY_OPTIONS_TYPE_VHOST_USER: 1034 legacy.type = NET_CLIENT_DRIVER_VHOST_USER; 1035 legacy.u.vhost_user = opts->u.vhost_user; 1036 break; 1037 default: 1038 abort(); 1039 } 1040 1041 if (!net_client_init_fun[netdev->type]) { 1042 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type", 1043 "a net backend type (maybe it is not compiled " 1044 "into this binary)"); 1045 return -1; 1046 } 1047 1048 /* Do not add to a hub if it's a nic with a netdev= parameter. */ 1049 if (netdev->type != NET_CLIENT_DRIVER_NIC || 1050 !opts->u.nic.has_netdev) { 1051 peer = net_hub_add_port(0, NULL, NULL); 1052 } 1053 } 1054 1055 if (net_client_init_fun[netdev->type](netdev, name, peer, errp) < 0) { 1056 /* FIXME drop when all init functions store an Error */ 1057 if (errp && !*errp) { 1058 error_setg(errp, QERR_DEVICE_INIT_FAILED, 1059 NetClientDriver_str(netdev->type)); 1060 } 1061 return -1; 1062 } 1063 1064 if (is_netdev) { 1065 NetClientState *nc; 1066 1067 nc = qemu_find_netdev(netdev->id); 1068 assert(nc); 1069 nc->is_netdev = true; 1070 } 1071 1072 return 0; 1073 } 1074 1075 static void show_netdevs(void) 1076 { 1077 int idx; 1078 const char *available_netdevs[] = { 1079 "socket", 1080 "hubport", 1081 "tap", 1082 #ifdef CONFIG_SLIRP 1083 "user", 1084 #endif 1085 #ifdef CONFIG_L2TPV3 1086 "l2tpv3", 1087 #endif 1088 #ifdef CONFIG_VDE 1089 "vde", 1090 #endif 1091 #ifdef CONFIG_NET_BRIDGE 1092 "bridge", 1093 #endif 1094 #ifdef CONFIG_NETMAP 1095 "netmap", 1096 #endif 1097 #ifdef CONFIG_POSIX 1098 "vhost-user", 1099 #endif 1100 }; 1101 1102 printf("Available netdev backend types:\n"); 1103 for (idx = 0; idx < ARRAY_SIZE(available_netdevs); idx++) { 1104 puts(available_netdevs[idx]); 1105 } 1106 } 1107 1108 static int net_client_init(QemuOpts *opts, bool is_netdev, Error **errp) 1109 { 1110 gchar **substrings = NULL; 1111 void *object = NULL; 1112 Error *err = NULL; 1113 int ret = -1; 1114 Visitor *v = opts_visitor_new(opts); 1115 1116 const char *type = qemu_opt_get(opts, "type"); 1117 1118 if (is_netdev && type && is_help_option(type)) { 1119 show_netdevs(); 1120 exit(0); 1121 } else { 1122 /* Parse convenience option format ip6-net=fec0::0[/64] */ 1123 const char *ip6_net = qemu_opt_get(opts, "ipv6-net"); 1124 1125 if (ip6_net) { 1126 char *prefix_addr; 1127 unsigned long prefix_len = 64; /* Default 64bit prefix length. */ 1128 1129 substrings = g_strsplit(ip6_net, "/", 2); 1130 if (!substrings || !substrings[0]) { 1131 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "ipv6-net", 1132 "a valid IPv6 prefix"); 1133 goto out; 1134 } 1135 1136 prefix_addr = substrings[0]; 1137 1138 /* Handle user-specified prefix length. */ 1139 if (substrings[1] && 1140 qemu_strtoul(substrings[1], NULL, 10, &prefix_len)) 1141 { 1142 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1143 "ipv6-prefixlen", "a number"); 1144 goto out; 1145 } 1146 1147 qemu_opt_set(opts, "ipv6-prefix", prefix_addr, &error_abort); 1148 qemu_opt_set_number(opts, "ipv6-prefixlen", prefix_len, 1149 &error_abort); 1150 qemu_opt_unset(opts, "ipv6-net"); 1151 } 1152 } 1153 1154 if (is_netdev) { 1155 visit_type_Netdev(v, NULL, (Netdev **)&object, &err); 1156 } else { 1157 visit_type_NetLegacy(v, NULL, (NetLegacy **)&object, &err); 1158 } 1159 1160 if (!err) { 1161 ret = net_client_init1(object, is_netdev, &err); 1162 } 1163 1164 if (is_netdev) { 1165 qapi_free_Netdev(object); 1166 } else { 1167 qapi_free_NetLegacy(object); 1168 } 1169 1170 out: 1171 error_propagate(errp, err); 1172 g_strfreev(substrings); 1173 visit_free(v); 1174 return ret; 1175 } 1176 1177 void netdev_add(QemuOpts *opts, Error **errp) 1178 { 1179 net_client_init(opts, true, errp); 1180 } 1181 1182 void qmp_netdev_add(Netdev *netdev, Error **errp) 1183 { 1184 net_client_init1(netdev, true, errp); 1185 } 1186 1187 void qmp_netdev_del(const char *id, Error **errp) 1188 { 1189 NetClientState *nc; 1190 1191 nc = qemu_find_netdev(id); 1192 if (!nc) { 1193 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1194 "Device '%s' not found", id); 1195 return; 1196 } 1197 1198 if (!nc->is_netdev) { 1199 error_setg(errp, "Device '%s' is not a netdev", id); 1200 return; 1201 } 1202 1203 qemu_del_net_client(nc); 1204 } 1205 1206 static void netfilter_print_info(Monitor *mon, NetFilterState *nf) 1207 { 1208 char *str; 1209 ObjectProperty *prop; 1210 ObjectPropertyIterator iter; 1211 Visitor *v; 1212 1213 /* generate info str */ 1214 object_property_iter_init(&iter, OBJECT(nf)); 1215 while ((prop = object_property_iter_next(&iter))) { 1216 if (!strcmp(prop->name, "type")) { 1217 continue; 1218 } 1219 v = string_output_visitor_new(false, &str); 1220 object_property_get(OBJECT(nf), v, prop->name, NULL); 1221 visit_complete(v, &str); 1222 visit_free(v); 1223 monitor_printf(mon, ",%s=%s", prop->name, str); 1224 g_free(str); 1225 } 1226 monitor_printf(mon, "\n"); 1227 } 1228 1229 void print_net_client(Monitor *mon, NetClientState *nc) 1230 { 1231 NetFilterState *nf; 1232 1233 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name, 1234 nc->queue_index, 1235 NetClientDriver_str(nc->info->type), 1236 nc->info_str); 1237 if (!QTAILQ_EMPTY(&nc->filters)) { 1238 monitor_printf(mon, "filters:\n"); 1239 } 1240 QTAILQ_FOREACH(nf, &nc->filters, next) { 1241 char *path = object_get_canonical_path_component(OBJECT(nf)); 1242 1243 monitor_printf(mon, " - %s: type=%s", path, 1244 object_get_typename(OBJECT(nf))); 1245 netfilter_print_info(mon, nf); 1246 g_free(path); 1247 } 1248 } 1249 1250 RxFilterInfoList *qmp_query_rx_filter(bool has_name, const char *name, 1251 Error **errp) 1252 { 1253 NetClientState *nc; 1254 RxFilterInfoList *filter_list = NULL, *last_entry = NULL; 1255 1256 QTAILQ_FOREACH(nc, &net_clients, next) { 1257 RxFilterInfoList *entry; 1258 RxFilterInfo *info; 1259 1260 if (has_name && strcmp(nc->name, name) != 0) { 1261 continue; 1262 } 1263 1264 /* only query rx-filter information of NIC */ 1265 if (nc->info->type != NET_CLIENT_DRIVER_NIC) { 1266 if (has_name) { 1267 error_setg(errp, "net client(%s) isn't a NIC", name); 1268 return NULL; 1269 } 1270 continue; 1271 } 1272 1273 /* only query information on queue 0 since the info is per nic, 1274 * not per queue 1275 */ 1276 if (nc->queue_index != 0) 1277 continue; 1278 1279 if (nc->info->query_rx_filter) { 1280 info = nc->info->query_rx_filter(nc); 1281 entry = g_malloc0(sizeof(*entry)); 1282 entry->value = info; 1283 1284 if (!filter_list) { 1285 filter_list = entry; 1286 } else { 1287 last_entry->next = entry; 1288 } 1289 last_entry = entry; 1290 } else if (has_name) { 1291 error_setg(errp, "net client(%s) doesn't support" 1292 " rx-filter querying", name); 1293 return NULL; 1294 } 1295 1296 if (has_name) { 1297 break; 1298 } 1299 } 1300 1301 if (filter_list == NULL && has_name) { 1302 error_setg(errp, "invalid net client name: %s", name); 1303 } 1304 1305 return filter_list; 1306 } 1307 1308 void hmp_info_network(Monitor *mon, const QDict *qdict) 1309 { 1310 NetClientState *nc, *peer; 1311 NetClientDriver type; 1312 1313 net_hub_info(mon); 1314 1315 QTAILQ_FOREACH(nc, &net_clients, next) { 1316 peer = nc->peer; 1317 type = nc->info->type; 1318 1319 /* Skip if already printed in hub info */ 1320 if (net_hub_id_for_client(nc, NULL) == 0) { 1321 continue; 1322 } 1323 1324 if (!peer || type == NET_CLIENT_DRIVER_NIC) { 1325 print_net_client(mon, nc); 1326 } /* else it's a netdev connected to a NIC, printed with the NIC */ 1327 if (peer && type == NET_CLIENT_DRIVER_NIC) { 1328 monitor_printf(mon, " \\ "); 1329 print_net_client(mon, peer); 1330 } 1331 } 1332 } 1333 1334 void colo_notify_filters_event(int event, Error **errp) 1335 { 1336 NetClientState *nc; 1337 NetFilterState *nf; 1338 NetFilterClass *nfc = NULL; 1339 Error *local_err = NULL; 1340 1341 QTAILQ_FOREACH(nc, &net_clients, next) { 1342 QTAILQ_FOREACH(nf, &nc->filters, next) { 1343 nfc = NETFILTER_GET_CLASS(OBJECT(nf)); 1344 nfc->handle_event(nf, event, &local_err); 1345 if (local_err) { 1346 error_propagate(errp, local_err); 1347 return; 1348 } 1349 } 1350 } 1351 } 1352 1353 void qmp_set_link(const char *name, bool up, Error **errp) 1354 { 1355 NetClientState *ncs[MAX_QUEUE_NUM]; 1356 NetClientState *nc; 1357 int queues, i; 1358 1359 queues = qemu_find_net_clients_except(name, ncs, 1360 NET_CLIENT_DRIVER__MAX, 1361 MAX_QUEUE_NUM); 1362 1363 if (queues == 0) { 1364 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1365 "Device '%s' not found", name); 1366 return; 1367 } 1368 nc = ncs[0]; 1369 1370 for (i = 0; i < queues; i++) { 1371 ncs[i]->link_down = !up; 1372 } 1373 1374 if (nc->info->link_status_changed) { 1375 nc->info->link_status_changed(nc); 1376 } 1377 1378 if (nc->peer) { 1379 /* Change peer link only if the peer is NIC and then notify peer. 1380 * If the peer is a HUBPORT or a backend, we do not change the 1381 * link status. 1382 * 1383 * This behavior is compatible with qemu hubs where there could be 1384 * multiple clients that can still communicate with each other in 1385 * disconnected mode. For now maintain this compatibility. 1386 */ 1387 if (nc->peer->info->type == NET_CLIENT_DRIVER_NIC) { 1388 for (i = 0; i < queues; i++) { 1389 ncs[i]->peer->link_down = !up; 1390 } 1391 } 1392 if (nc->peer->info->link_status_changed) { 1393 nc->peer->info->link_status_changed(nc->peer); 1394 } 1395 } 1396 } 1397 1398 static void net_vm_change_state_handler(void *opaque, int running, 1399 RunState state) 1400 { 1401 NetClientState *nc; 1402 NetClientState *tmp; 1403 1404 QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) { 1405 if (running) { 1406 /* Flush queued packets and wake up backends. */ 1407 if (nc->peer && qemu_can_send_packet(nc)) { 1408 qemu_flush_queued_packets(nc->peer); 1409 } 1410 } else { 1411 /* Complete all queued packets, to guarantee we don't modify 1412 * state later when VM is not running. 1413 */ 1414 qemu_flush_or_purge_queued_packets(nc, true); 1415 } 1416 } 1417 } 1418 1419 void net_cleanup(void) 1420 { 1421 NetClientState *nc; 1422 1423 /* We may del multiple entries during qemu_del_net_client(), 1424 * so QTAILQ_FOREACH_SAFE() is also not safe here. 1425 */ 1426 while (!QTAILQ_EMPTY(&net_clients)) { 1427 nc = QTAILQ_FIRST(&net_clients); 1428 if (nc->info->type == NET_CLIENT_DRIVER_NIC) { 1429 qemu_del_nic(qemu_get_nic(nc)); 1430 } else { 1431 qemu_del_net_client(nc); 1432 } 1433 } 1434 1435 qemu_del_vm_change_state_handler(net_change_state_entry); 1436 } 1437 1438 void net_check_clients(void) 1439 { 1440 NetClientState *nc; 1441 int i; 1442 1443 net_hub_check_clients(); 1444 1445 QTAILQ_FOREACH(nc, &net_clients, next) { 1446 if (!nc->peer) { 1447 warn_report("%s %s has no peer", 1448 nc->info->type == NET_CLIENT_DRIVER_NIC 1449 ? "nic" : "netdev", 1450 nc->name); 1451 } 1452 } 1453 1454 /* Check that all NICs requested via -net nic actually got created. 1455 * NICs created via -device don't need to be checked here because 1456 * they are always instantiated. 1457 */ 1458 for (i = 0; i < MAX_NICS; i++) { 1459 NICInfo *nd = &nd_table[i]; 1460 if (nd->used && !nd->instantiated) { 1461 warn_report("requested NIC (%s, model %s) " 1462 "was not created (not supported by this machine?)", 1463 nd->name ? nd->name : "anonymous", 1464 nd->model ? nd->model : "unspecified"); 1465 } 1466 } 1467 } 1468 1469 static int net_init_client(void *dummy, QemuOpts *opts, Error **errp) 1470 { 1471 return net_client_init(opts, false, errp); 1472 } 1473 1474 static int net_init_netdev(void *dummy, QemuOpts *opts, Error **errp) 1475 { 1476 return net_client_init(opts, true, errp); 1477 } 1478 1479 /* For the convenience "--nic" parameter */ 1480 static int net_param_nic(void *dummy, QemuOpts *opts, Error **errp) 1481 { 1482 char *mac, *nd_id; 1483 int idx, ret; 1484 NICInfo *ni; 1485 const char *type; 1486 1487 type = qemu_opt_get(opts, "type"); 1488 if (type && g_str_equal(type, "none")) { 1489 return 0; /* Nothing to do, default_net is cleared in vl.c */ 1490 } 1491 1492 idx = nic_get_free_idx(); 1493 if (idx == -1 || nb_nics >= MAX_NICS) { 1494 error_setg(errp, "no more on-board/default NIC slots available"); 1495 return -1; 1496 } 1497 1498 if (!type) { 1499 qemu_opt_set(opts, "type", "user", &error_abort); 1500 } 1501 1502 ni = &nd_table[idx]; 1503 memset(ni, 0, sizeof(*ni)); 1504 ni->model = qemu_opt_get_del(opts, "model"); 1505 1506 /* Create an ID if the user did not specify one */ 1507 nd_id = g_strdup(qemu_opts_id(opts)); 1508 if (!nd_id) { 1509 nd_id = g_strdup_printf("__org.qemu.nic%i\n", idx); 1510 qemu_opts_set_id(opts, nd_id); 1511 } 1512 1513 /* Handle MAC address */ 1514 mac = qemu_opt_get_del(opts, "mac"); 1515 if (mac) { 1516 ret = net_parse_macaddr(ni->macaddr.a, mac); 1517 g_free(mac); 1518 if (ret) { 1519 error_setg(errp, "invalid syntax for ethernet address"); 1520 goto out; 1521 } 1522 if (is_multicast_ether_addr(ni->macaddr.a)) { 1523 error_setg(errp, "NIC cannot have multicast MAC address"); 1524 ret = -1; 1525 goto out; 1526 } 1527 } 1528 qemu_macaddr_default_if_unset(&ni->macaddr); 1529 1530 ret = net_client_init(opts, true, errp); 1531 if (ret == 0) { 1532 ni->netdev = qemu_find_netdev(nd_id); 1533 ni->used = true; 1534 nb_nics++; 1535 } 1536 1537 out: 1538 g_free(nd_id); 1539 return ret; 1540 } 1541 1542 int net_init_clients(Error **errp) 1543 { 1544 net_change_state_entry = 1545 qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL); 1546 1547 QTAILQ_INIT(&net_clients); 1548 1549 if (qemu_opts_foreach(qemu_find_opts("netdev"), 1550 net_init_netdev, NULL, errp)) { 1551 return -1; 1552 } 1553 1554 if (qemu_opts_foreach(qemu_find_opts("nic"), net_param_nic, NULL, errp)) { 1555 return -1; 1556 } 1557 1558 if (qemu_opts_foreach(qemu_find_opts("net"), net_init_client, NULL, errp)) { 1559 return -1; 1560 } 1561 1562 return 0; 1563 } 1564 1565 int net_client_parse(QemuOptsList *opts_list, const char *optarg) 1566 { 1567 if (!qemu_opts_parse_noisily(opts_list, optarg, true)) { 1568 return -1; 1569 } 1570 1571 return 0; 1572 } 1573 1574 /* From FreeBSD */ 1575 /* XXX: optimize */ 1576 uint32_t net_crc32(const uint8_t *p, int len) 1577 { 1578 uint32_t crc; 1579 int carry, i, j; 1580 uint8_t b; 1581 1582 crc = 0xffffffff; 1583 for (i = 0; i < len; i++) { 1584 b = *p++; 1585 for (j = 0; j < 8; j++) { 1586 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01); 1587 crc <<= 1; 1588 b >>= 1; 1589 if (carry) { 1590 crc = ((crc ^ POLYNOMIAL_BE) | carry); 1591 } 1592 } 1593 } 1594 1595 return crc; 1596 } 1597 1598 uint32_t net_crc32_le(const uint8_t *p, int len) 1599 { 1600 uint32_t crc; 1601 int carry, i, j; 1602 uint8_t b; 1603 1604 crc = 0xffffffff; 1605 for (i = 0; i < len; i++) { 1606 b = *p++; 1607 for (j = 0; j < 8; j++) { 1608 carry = (crc & 0x1) ^ (b & 0x01); 1609 crc >>= 1; 1610 b >>= 1; 1611 if (carry) { 1612 crc ^= POLYNOMIAL_LE; 1613 } 1614 } 1615 } 1616 1617 return crc; 1618 } 1619 1620 QemuOptsList qemu_netdev_opts = { 1621 .name = "netdev", 1622 .implied_opt_name = "type", 1623 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head), 1624 .desc = { 1625 /* 1626 * no elements => accept any params 1627 * validation will happen later 1628 */ 1629 { /* end of list */ } 1630 }, 1631 }; 1632 1633 QemuOptsList qemu_nic_opts = { 1634 .name = "nic", 1635 .implied_opt_name = "type", 1636 .head = QTAILQ_HEAD_INITIALIZER(qemu_nic_opts.head), 1637 .desc = { 1638 /* 1639 * no elements => accept any params 1640 * validation will happen later 1641 */ 1642 { /* end of list */ } 1643 }, 1644 }; 1645 1646 QemuOptsList qemu_net_opts = { 1647 .name = "net", 1648 .implied_opt_name = "type", 1649 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head), 1650 .desc = { 1651 /* 1652 * no elements => accept any params 1653 * validation will happen later 1654 */ 1655 { /* end of list */ } 1656 }, 1657 }; 1658 1659 void net_socket_rs_init(SocketReadState *rs, 1660 SocketReadStateFinalize *finalize, 1661 bool vnet_hdr) 1662 { 1663 rs->state = 0; 1664 rs->vnet_hdr = vnet_hdr; 1665 rs->index = 0; 1666 rs->packet_len = 0; 1667 rs->vnet_hdr_len = 0; 1668 memset(rs->buf, 0, sizeof(rs->buf)); 1669 rs->finalize = finalize; 1670 } 1671 1672 /* 1673 * Returns 1674 * 0: success 1675 * -1: error occurs 1676 */ 1677 int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size) 1678 { 1679 unsigned int l; 1680 1681 while (size > 0) { 1682 /* Reassemble a packet from the network. 1683 * 0 = getting length. 1684 * 1 = getting vnet header length. 1685 * 2 = getting data. 1686 */ 1687 switch (rs->state) { 1688 case 0: 1689 l = 4 - rs->index; 1690 if (l > size) { 1691 l = size; 1692 } 1693 memcpy(rs->buf + rs->index, buf, l); 1694 buf += l; 1695 size -= l; 1696 rs->index += l; 1697 if (rs->index == 4) { 1698 /* got length */ 1699 rs->packet_len = ntohl(*(uint32_t *)rs->buf); 1700 rs->index = 0; 1701 if (rs->vnet_hdr) { 1702 rs->state = 1; 1703 } else { 1704 rs->state = 2; 1705 rs->vnet_hdr_len = 0; 1706 } 1707 } 1708 break; 1709 case 1: 1710 l = 4 - rs->index; 1711 if (l > size) { 1712 l = size; 1713 } 1714 memcpy(rs->buf + rs->index, buf, l); 1715 buf += l; 1716 size -= l; 1717 rs->index += l; 1718 if (rs->index == 4) { 1719 /* got vnet header length */ 1720 rs->vnet_hdr_len = ntohl(*(uint32_t *)rs->buf); 1721 rs->index = 0; 1722 rs->state = 2; 1723 } 1724 break; 1725 case 2: 1726 l = rs->packet_len - rs->index; 1727 if (l > size) { 1728 l = size; 1729 } 1730 if (rs->index + l <= sizeof(rs->buf)) { 1731 memcpy(rs->buf + rs->index, buf, l); 1732 } else { 1733 fprintf(stderr, "serious error: oversized packet received," 1734 "connection terminated.\n"); 1735 rs->index = rs->state = 0; 1736 return -1; 1737 } 1738 1739 rs->index += l; 1740 buf += l; 1741 size -= l; 1742 if (rs->index >= rs->packet_len) { 1743 rs->index = 0; 1744 rs->state = 0; 1745 assert(rs->finalize); 1746 rs->finalize(rs); 1747 } 1748 break; 1749 } 1750 } 1751 1752 assert(size == 0); 1753 return 0; 1754 } 1755