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 "hw/qdev.h" 45 #include "qemu/iov.h" 46 #include "qemu/main-loop.h" 47 #include "qemu/option.h" 48 #include "qapi/error.h" 49 #include "qapi/opts-visitor.h" 50 #include "sysemu/sysemu.h" 51 #include "sysemu/qtest.h" 52 #include "net/filter.h" 53 #include "qapi/string-output-visitor.h" 54 55 /* Net bridge is currently not supported for W32. */ 56 #if !defined(_WIN32) 57 # define CONFIG_NET_BRIDGE 58 #endif 59 60 static VMChangeStateEntry *net_change_state_entry; 61 static QTAILQ_HEAD(, NetClientState) net_clients; 62 63 /***********************************************************/ 64 /* network device redirectors */ 65 66 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep) 67 { 68 const char *p, *p1; 69 int len; 70 p = *pp; 71 p1 = strchr(p, sep); 72 if (!p1) 73 return -1; 74 len = p1 - p; 75 p1++; 76 if (buf_size > 0) { 77 if (len > buf_size - 1) 78 len = buf_size - 1; 79 memcpy(buf, p, len); 80 buf[len] = '\0'; 81 } 82 *pp = p1; 83 return 0; 84 } 85 86 int parse_host_port(struct sockaddr_in *saddr, const char *str, 87 Error **errp) 88 { 89 char buf[512]; 90 struct hostent *he; 91 const char *p, *r; 92 int port; 93 94 p = str; 95 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 96 error_setg(errp, "host address '%s' doesn't contain ':' " 97 "separating host from port", str); 98 return -1; 99 } 100 saddr->sin_family = AF_INET; 101 if (buf[0] == '\0') { 102 saddr->sin_addr.s_addr = 0; 103 } else { 104 if (qemu_isdigit(buf[0])) { 105 if (!inet_aton(buf, &saddr->sin_addr)) { 106 error_setg(errp, "host address '%s' is not a valid " 107 "IPv4 address", buf); 108 return -1; 109 } 110 } else { 111 he = gethostbyname(buf); 112 if (he == NULL) { 113 error_setg(errp, "can't resolve host address '%s'", buf); 114 return - 1; 115 } 116 saddr->sin_addr = *(struct in_addr *)he->h_addr; 117 } 118 } 119 port = strtol(p, (char **)&r, 0); 120 if (r == p) { 121 error_setg(errp, "port number '%s' is invalid", p); 122 return -1; 123 } 124 saddr->sin_port = htons(port); 125 return 0; 126 } 127 128 char *qemu_mac_strdup_printf(const uint8_t *macaddr) 129 { 130 return g_strdup_printf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x", 131 macaddr[0], macaddr[1], macaddr[2], 132 macaddr[3], macaddr[4], macaddr[5]); 133 } 134 135 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]) 136 { 137 snprintf(nc->info_str, sizeof(nc->info_str), 138 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x", 139 nc->model, 140 macaddr[0], macaddr[1], macaddr[2], 141 macaddr[3], macaddr[4], macaddr[5]); 142 } 143 144 static int mac_table[256] = {0}; 145 146 static void qemu_macaddr_set_used(MACAddr *macaddr) 147 { 148 int index; 149 150 for (index = 0x56; index < 0xFF; index++) { 151 if (macaddr->a[5] == index) { 152 mac_table[index]++; 153 } 154 } 155 } 156 157 static void qemu_macaddr_set_free(MACAddr *macaddr) 158 { 159 int index; 160 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } }; 161 162 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) { 163 return; 164 } 165 for (index = 0x56; index < 0xFF; index++) { 166 if (macaddr->a[5] == index) { 167 mac_table[index]--; 168 } 169 } 170 } 171 172 static int qemu_macaddr_get_free(void) 173 { 174 int index; 175 176 for (index = 0x56; index < 0xFF; index++) { 177 if (mac_table[index] == 0) { 178 return index; 179 } 180 } 181 182 return -1; 183 } 184 185 void qemu_macaddr_default_if_unset(MACAddr *macaddr) 186 { 187 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } }; 188 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } }; 189 190 if (memcmp(macaddr, &zero, sizeof(zero)) != 0) { 191 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) { 192 return; 193 } else { 194 qemu_macaddr_set_used(macaddr); 195 return; 196 } 197 } 198 199 macaddr->a[0] = 0x52; 200 macaddr->a[1] = 0x54; 201 macaddr->a[2] = 0x00; 202 macaddr->a[3] = 0x12; 203 macaddr->a[4] = 0x34; 204 macaddr->a[5] = qemu_macaddr_get_free(); 205 qemu_macaddr_set_used(macaddr); 206 } 207 208 /** 209 * Generate a name for net client 210 * 211 * Only net clients created with the legacy -net option and NICs need this. 212 */ 213 static char *assign_name(NetClientState *nc1, const char *model) 214 { 215 NetClientState *nc; 216 int id = 0; 217 218 QTAILQ_FOREACH(nc, &net_clients, next) { 219 if (nc == nc1) { 220 continue; 221 } 222 if (strcmp(nc->model, model) == 0) { 223 id++; 224 } 225 } 226 227 return g_strdup_printf("%s.%d", model, id); 228 } 229 230 static void qemu_net_client_destructor(NetClientState *nc) 231 { 232 g_free(nc); 233 } 234 static ssize_t qemu_deliver_packet_iov(NetClientState *sender, 235 unsigned flags, 236 const struct iovec *iov, 237 int iovcnt, 238 void *opaque); 239 240 static void qemu_net_client_setup(NetClientState *nc, 241 NetClientInfo *info, 242 NetClientState *peer, 243 const char *model, 244 const char *name, 245 NetClientDestructor *destructor) 246 { 247 nc->info = info; 248 nc->model = g_strdup(model); 249 if (name) { 250 nc->name = g_strdup(name); 251 } else { 252 nc->name = assign_name(nc, model); 253 } 254 255 if (peer) { 256 assert(!peer->peer); 257 nc->peer = peer; 258 peer->peer = nc; 259 } 260 QTAILQ_INSERT_TAIL(&net_clients, nc, next); 261 262 nc->incoming_queue = qemu_new_net_queue(qemu_deliver_packet_iov, nc); 263 nc->destructor = destructor; 264 QTAILQ_INIT(&nc->filters); 265 } 266 267 NetClientState *qemu_new_net_client(NetClientInfo *info, 268 NetClientState *peer, 269 const char *model, 270 const char *name) 271 { 272 NetClientState *nc; 273 274 assert(info->size >= sizeof(NetClientState)); 275 276 nc = g_malloc0(info->size); 277 qemu_net_client_setup(nc, info, peer, model, name, 278 qemu_net_client_destructor); 279 280 return nc; 281 } 282 283 NICState *qemu_new_nic(NetClientInfo *info, 284 NICConf *conf, 285 const char *model, 286 const char *name, 287 void *opaque) 288 { 289 NetClientState **peers = conf->peers.ncs; 290 NICState *nic; 291 int i, queues = MAX(1, conf->peers.queues); 292 293 assert(info->type == NET_CLIENT_DRIVER_NIC); 294 assert(info->size >= sizeof(NICState)); 295 296 nic = g_malloc0(info->size + sizeof(NetClientState) * queues); 297 nic->ncs = (void *)nic + info->size; 298 nic->conf = conf; 299 nic->opaque = opaque; 300 301 for (i = 0; i < queues; i++) { 302 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name, 303 NULL); 304 nic->ncs[i].queue_index = i; 305 } 306 307 return nic; 308 } 309 310 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index) 311 { 312 return nic->ncs + queue_index; 313 } 314 315 NetClientState *qemu_get_queue(NICState *nic) 316 { 317 return qemu_get_subqueue(nic, 0); 318 } 319 320 NICState *qemu_get_nic(NetClientState *nc) 321 { 322 NetClientState *nc0 = nc - nc->queue_index; 323 324 return (NICState *)((void *)nc0 - nc->info->size); 325 } 326 327 void *qemu_get_nic_opaque(NetClientState *nc) 328 { 329 NICState *nic = qemu_get_nic(nc); 330 331 return nic->opaque; 332 } 333 334 static void qemu_cleanup_net_client(NetClientState *nc) 335 { 336 QTAILQ_REMOVE(&net_clients, nc, next); 337 338 if (nc->info->cleanup) { 339 nc->info->cleanup(nc); 340 } 341 } 342 343 static void qemu_free_net_client(NetClientState *nc) 344 { 345 if (nc->incoming_queue) { 346 qemu_del_net_queue(nc->incoming_queue); 347 } 348 if (nc->peer) { 349 nc->peer->peer = NULL; 350 } 351 g_free(nc->name); 352 g_free(nc->model); 353 if (nc->destructor) { 354 nc->destructor(nc); 355 } 356 } 357 358 void qemu_del_net_client(NetClientState *nc) 359 { 360 NetClientState *ncs[MAX_QUEUE_NUM]; 361 int queues, i; 362 NetFilterState *nf, *next; 363 364 assert(nc->info->type != NET_CLIENT_DRIVER_NIC); 365 366 /* If the NetClientState belongs to a multiqueue backend, we will change all 367 * other NetClientStates also. 368 */ 369 queues = qemu_find_net_clients_except(nc->name, ncs, 370 NET_CLIENT_DRIVER_NIC, 371 MAX_QUEUE_NUM); 372 assert(queues != 0); 373 374 QTAILQ_FOREACH_SAFE(nf, &nc->filters, next, next) { 375 object_unparent(OBJECT(nf)); 376 } 377 378 /* If there is a peer NIC, delete and cleanup client, but do not free. */ 379 if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_NIC) { 380 NICState *nic = qemu_get_nic(nc->peer); 381 if (nic->peer_deleted) { 382 return; 383 } 384 nic->peer_deleted = true; 385 386 for (i = 0; i < queues; i++) { 387 ncs[i]->peer->link_down = true; 388 } 389 390 if (nc->peer->info->link_status_changed) { 391 nc->peer->info->link_status_changed(nc->peer); 392 } 393 394 for (i = 0; i < queues; i++) { 395 qemu_cleanup_net_client(ncs[i]); 396 } 397 398 return; 399 } 400 401 for (i = 0; i < queues; i++) { 402 qemu_cleanup_net_client(ncs[i]); 403 qemu_free_net_client(ncs[i]); 404 } 405 } 406 407 void qemu_del_nic(NICState *nic) 408 { 409 int i, queues = MAX(nic->conf->peers.queues, 1); 410 411 qemu_macaddr_set_free(&nic->conf->macaddr); 412 413 /* If this is a peer NIC and peer has already been deleted, free it now. */ 414 if (nic->peer_deleted) { 415 for (i = 0; i < queues; i++) { 416 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer); 417 } 418 } 419 420 for (i = queues - 1; i >= 0; i--) { 421 NetClientState *nc = qemu_get_subqueue(nic, i); 422 423 qemu_cleanup_net_client(nc); 424 qemu_free_net_client(nc); 425 } 426 427 g_free(nic); 428 } 429 430 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque) 431 { 432 NetClientState *nc; 433 434 QTAILQ_FOREACH(nc, &net_clients, next) { 435 if (nc->info->type == NET_CLIENT_DRIVER_NIC) { 436 if (nc->queue_index == 0) { 437 func(qemu_get_nic(nc), opaque); 438 } 439 } 440 } 441 } 442 443 bool qemu_has_ufo(NetClientState *nc) 444 { 445 if (!nc || !nc->info->has_ufo) { 446 return false; 447 } 448 449 return nc->info->has_ufo(nc); 450 } 451 452 bool qemu_has_vnet_hdr(NetClientState *nc) 453 { 454 if (!nc || !nc->info->has_vnet_hdr) { 455 return false; 456 } 457 458 return nc->info->has_vnet_hdr(nc); 459 } 460 461 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len) 462 { 463 if (!nc || !nc->info->has_vnet_hdr_len) { 464 return false; 465 } 466 467 return nc->info->has_vnet_hdr_len(nc, len); 468 } 469 470 void qemu_using_vnet_hdr(NetClientState *nc, bool enable) 471 { 472 if (!nc || !nc->info->using_vnet_hdr) { 473 return; 474 } 475 476 nc->info->using_vnet_hdr(nc, enable); 477 } 478 479 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6, 480 int ecn, int ufo) 481 { 482 if (!nc || !nc->info->set_offload) { 483 return; 484 } 485 486 nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo); 487 } 488 489 void qemu_set_vnet_hdr_len(NetClientState *nc, int len) 490 { 491 if (!nc || !nc->info->set_vnet_hdr_len) { 492 return; 493 } 494 495 nc->vnet_hdr_len = len; 496 nc->info->set_vnet_hdr_len(nc, len); 497 } 498 499 int qemu_set_vnet_le(NetClientState *nc, bool is_le) 500 { 501 #ifdef HOST_WORDS_BIGENDIAN 502 if (!nc || !nc->info->set_vnet_le) { 503 return -ENOSYS; 504 } 505 506 return nc->info->set_vnet_le(nc, is_le); 507 #else 508 return 0; 509 #endif 510 } 511 512 int qemu_set_vnet_be(NetClientState *nc, bool is_be) 513 { 514 #ifdef HOST_WORDS_BIGENDIAN 515 return 0; 516 #else 517 if (!nc || !nc->info->set_vnet_be) { 518 return -ENOSYS; 519 } 520 521 return nc->info->set_vnet_be(nc, is_be); 522 #endif 523 } 524 525 int qemu_can_send_packet(NetClientState *sender) 526 { 527 int vm_running = runstate_is_running(); 528 529 if (!vm_running) { 530 return 0; 531 } 532 533 if (!sender->peer) { 534 return 1; 535 } 536 537 if (sender->peer->receive_disabled) { 538 return 0; 539 } else if (sender->peer->info->can_receive && 540 !sender->peer->info->can_receive(sender->peer)) { 541 return 0; 542 } 543 return 1; 544 } 545 546 static ssize_t filter_receive_iov(NetClientState *nc, 547 NetFilterDirection direction, 548 NetClientState *sender, 549 unsigned flags, 550 const struct iovec *iov, 551 int iovcnt, 552 NetPacketSent *sent_cb) 553 { 554 ssize_t ret = 0; 555 NetFilterState *nf = NULL; 556 557 if (direction == NET_FILTER_DIRECTION_TX) { 558 QTAILQ_FOREACH(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 } else { 566 QTAILQ_FOREACH_REVERSE(nf, &nc->filters, next) { 567 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov, 568 iovcnt, sent_cb); 569 if (ret) { 570 return ret; 571 } 572 } 573 } 574 575 return ret; 576 } 577 578 static ssize_t filter_receive(NetClientState *nc, 579 NetFilterDirection direction, 580 NetClientState *sender, 581 unsigned flags, 582 const uint8_t *data, 583 size_t size, 584 NetPacketSent *sent_cb) 585 { 586 struct iovec iov = { 587 .iov_base = (void *)data, 588 .iov_len = size 589 }; 590 591 return filter_receive_iov(nc, direction, sender, flags, &iov, 1, sent_cb); 592 } 593 594 void qemu_purge_queued_packets(NetClientState *nc) 595 { 596 if (!nc->peer) { 597 return; 598 } 599 600 qemu_net_queue_purge(nc->peer->incoming_queue, nc); 601 } 602 603 void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge) 604 { 605 nc->receive_disabled = 0; 606 607 if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_HUBPORT) { 608 if (net_hub_flush(nc->peer)) { 609 qemu_notify_event(); 610 } 611 } 612 if (qemu_net_queue_flush(nc->incoming_queue)) { 613 /* We emptied the queue successfully, signal to the IO thread to repoll 614 * the file descriptor (for tap, for example). 615 */ 616 qemu_notify_event(); 617 } else if (purge) { 618 /* Unable to empty the queue, purge remaining packets */ 619 qemu_net_queue_purge(nc->incoming_queue, nc); 620 } 621 } 622 623 void qemu_flush_queued_packets(NetClientState *nc) 624 { 625 qemu_flush_or_purge_queued_packets(nc, false); 626 } 627 628 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender, 629 unsigned flags, 630 const uint8_t *buf, int size, 631 NetPacketSent *sent_cb) 632 { 633 NetQueue *queue; 634 int ret; 635 636 #ifdef DEBUG_NET 637 printf("qemu_send_packet_async:\n"); 638 qemu_hexdump((const char *)buf, stdout, "net", size); 639 #endif 640 641 if (sender->link_down || !sender->peer) { 642 return size; 643 } 644 645 /* Let filters handle the packet first */ 646 ret = filter_receive(sender, NET_FILTER_DIRECTION_TX, 647 sender, flags, buf, size, sent_cb); 648 if (ret) { 649 return ret; 650 } 651 652 ret = filter_receive(sender->peer, NET_FILTER_DIRECTION_RX, 653 sender, flags, buf, size, sent_cb); 654 if (ret) { 655 return ret; 656 } 657 658 queue = sender->peer->incoming_queue; 659 660 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb); 661 } 662 663 ssize_t qemu_send_packet_async(NetClientState *sender, 664 const uint8_t *buf, int size, 665 NetPacketSent *sent_cb) 666 { 667 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE, 668 buf, size, sent_cb); 669 } 670 671 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size) 672 { 673 qemu_send_packet_async(nc, buf, size, NULL); 674 } 675 676 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size) 677 { 678 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW, 679 buf, size, NULL); 680 } 681 682 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov, 683 int iovcnt, unsigned flags) 684 { 685 uint8_t *buf = NULL; 686 uint8_t *buffer; 687 size_t offset; 688 ssize_t ret; 689 690 if (iovcnt == 1) { 691 buffer = iov[0].iov_base; 692 offset = iov[0].iov_len; 693 } else { 694 offset = iov_size(iov, iovcnt); 695 if (offset > NET_BUFSIZE) { 696 return -1; 697 } 698 buf = g_malloc(offset); 699 buffer = buf; 700 offset = iov_to_buf(iov, iovcnt, 0, buf, offset); 701 } 702 703 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) { 704 ret = nc->info->receive_raw(nc, buffer, offset); 705 } else { 706 ret = nc->info->receive(nc, buffer, offset); 707 } 708 709 g_free(buf); 710 return ret; 711 } 712 713 static ssize_t qemu_deliver_packet_iov(NetClientState *sender, 714 unsigned flags, 715 const struct iovec *iov, 716 int iovcnt, 717 void *opaque) 718 { 719 NetClientState *nc = opaque; 720 int ret; 721 722 723 if (nc->link_down) { 724 return iov_size(iov, iovcnt); 725 } 726 727 if (nc->receive_disabled) { 728 return 0; 729 } 730 731 if (nc->info->receive_iov && !(flags & QEMU_NET_PACKET_FLAG_RAW)) { 732 ret = nc->info->receive_iov(nc, iov, iovcnt); 733 } else { 734 ret = nc_sendv_compat(nc, iov, iovcnt, flags); 735 } 736 737 if (ret == 0) { 738 nc->receive_disabled = 1; 739 } 740 741 return ret; 742 } 743 744 ssize_t qemu_sendv_packet_async(NetClientState *sender, 745 const struct iovec *iov, int iovcnt, 746 NetPacketSent *sent_cb) 747 { 748 NetQueue *queue; 749 size_t size = iov_size(iov, iovcnt); 750 int ret; 751 752 if (size > NET_BUFSIZE) { 753 return size; 754 } 755 756 if (sender->link_down || !sender->peer) { 757 return size; 758 } 759 760 /* Let filters handle the packet first */ 761 ret = filter_receive_iov(sender, NET_FILTER_DIRECTION_TX, sender, 762 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb); 763 if (ret) { 764 return ret; 765 } 766 767 ret = filter_receive_iov(sender->peer, NET_FILTER_DIRECTION_RX, sender, 768 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb); 769 if (ret) { 770 return ret; 771 } 772 773 queue = sender->peer->incoming_queue; 774 775 return qemu_net_queue_send_iov(queue, sender, 776 QEMU_NET_PACKET_FLAG_NONE, 777 iov, iovcnt, sent_cb); 778 } 779 780 ssize_t 781 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt) 782 { 783 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL); 784 } 785 786 NetClientState *qemu_find_netdev(const char *id) 787 { 788 NetClientState *nc; 789 790 QTAILQ_FOREACH(nc, &net_clients, next) { 791 if (nc->info->type == NET_CLIENT_DRIVER_NIC) 792 continue; 793 if (!strcmp(nc->name, id)) { 794 return nc; 795 } 796 } 797 798 return NULL; 799 } 800 801 int qemu_find_net_clients_except(const char *id, NetClientState **ncs, 802 NetClientDriver type, int max) 803 { 804 NetClientState *nc; 805 int ret = 0; 806 807 QTAILQ_FOREACH(nc, &net_clients, next) { 808 if (nc->info->type == type) { 809 continue; 810 } 811 if (!id || !strcmp(nc->name, id)) { 812 if (ret < max) { 813 ncs[ret] = nc; 814 } 815 ret++; 816 } 817 } 818 819 return ret; 820 } 821 822 static int nic_get_free_idx(void) 823 { 824 int index; 825 826 for (index = 0; index < MAX_NICS; index++) 827 if (!nd_table[index].used) 828 return index; 829 return -1; 830 } 831 832 int qemu_show_nic_models(const char *arg, const char *const *models) 833 { 834 int i; 835 836 if (!arg || !is_help_option(arg)) { 837 return 0; 838 } 839 840 fprintf(stderr, "qemu: Supported NIC models: "); 841 for (i = 0 ; models[i]; i++) 842 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n'); 843 return 1; 844 } 845 846 void qemu_check_nic_model(NICInfo *nd, const char *model) 847 { 848 const char *models[2]; 849 850 models[0] = model; 851 models[1] = NULL; 852 853 if (qemu_show_nic_models(nd->model, models)) 854 exit(0); 855 if (qemu_find_nic_model(nd, models, model) < 0) 856 exit(1); 857 } 858 859 int qemu_find_nic_model(NICInfo *nd, const char * const *models, 860 const char *default_model) 861 { 862 int i; 863 864 if (!nd->model) 865 nd->model = g_strdup(default_model); 866 867 for (i = 0 ; models[i]; i++) { 868 if (strcmp(nd->model, models[i]) == 0) 869 return i; 870 } 871 872 error_report("Unsupported NIC model: %s", nd->model); 873 return -1; 874 } 875 876 static int net_init_nic(const Netdev *netdev, const char *name, 877 NetClientState *peer, Error **errp) 878 { 879 int idx; 880 NICInfo *nd; 881 const NetLegacyNicOptions *nic; 882 883 assert(netdev->type == NET_CLIENT_DRIVER_NIC); 884 nic = &netdev->u.nic; 885 886 idx = nic_get_free_idx(); 887 if (idx == -1 || nb_nics >= MAX_NICS) { 888 error_setg(errp, "too many NICs"); 889 return -1; 890 } 891 892 nd = &nd_table[idx]; 893 894 memset(nd, 0, sizeof(*nd)); 895 896 if (nic->has_netdev) { 897 nd->netdev = qemu_find_netdev(nic->netdev); 898 if (!nd->netdev) { 899 error_setg(errp, "netdev '%s' not found", nic->netdev); 900 return -1; 901 } 902 } else { 903 assert(peer); 904 nd->netdev = peer; 905 } 906 nd->name = g_strdup(name); 907 if (nic->has_model) { 908 nd->model = g_strdup(nic->model); 909 } 910 if (nic->has_addr) { 911 nd->devaddr = g_strdup(nic->addr); 912 } 913 914 if (nic->has_macaddr && 915 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) { 916 error_setg(errp, "invalid syntax for ethernet address"); 917 return -1; 918 } 919 if (nic->has_macaddr && 920 is_multicast_ether_addr(nd->macaddr.a)) { 921 error_setg(errp, 922 "NIC cannot have multicast MAC address (odd 1st byte)"); 923 return -1; 924 } 925 qemu_macaddr_default_if_unset(&nd->macaddr); 926 927 if (nic->has_vectors) { 928 if (nic->vectors > 0x7ffffff) { 929 error_setg(errp, "invalid # of vectors: %"PRIu32, nic->vectors); 930 return -1; 931 } 932 nd->nvectors = nic->vectors; 933 } else { 934 nd->nvectors = DEV_NVECTORS_UNSPECIFIED; 935 } 936 937 nd->used = 1; 938 nb_nics++; 939 940 return idx; 941 } 942 943 944 static int (* const net_client_init_fun[NET_CLIENT_DRIVER__MAX])( 945 const Netdev *netdev, 946 const char *name, 947 NetClientState *peer, Error **errp) = { 948 [NET_CLIENT_DRIVER_NIC] = net_init_nic, 949 #ifdef CONFIG_SLIRP 950 [NET_CLIENT_DRIVER_USER] = net_init_slirp, 951 #endif 952 [NET_CLIENT_DRIVER_TAP] = net_init_tap, 953 [NET_CLIENT_DRIVER_SOCKET] = net_init_socket, 954 #ifdef CONFIG_VDE 955 [NET_CLIENT_DRIVER_VDE] = net_init_vde, 956 #endif 957 #ifdef CONFIG_NETMAP 958 [NET_CLIENT_DRIVER_NETMAP] = net_init_netmap, 959 #endif 960 #ifdef CONFIG_NET_BRIDGE 961 [NET_CLIENT_DRIVER_BRIDGE] = net_init_bridge, 962 #endif 963 [NET_CLIENT_DRIVER_HUBPORT] = net_init_hubport, 964 #ifdef CONFIG_VHOST_NET_USED 965 [NET_CLIENT_DRIVER_VHOST_USER] = net_init_vhost_user, 966 #endif 967 #ifdef CONFIG_L2TPV3 968 [NET_CLIENT_DRIVER_L2TPV3] = net_init_l2tpv3, 969 #endif 970 }; 971 972 973 static int net_client_init1(const void *object, bool is_netdev, Error **errp) 974 { 975 Netdev legacy = {0}; 976 const Netdev *netdev; 977 const char *name; 978 NetClientState *peer = NULL; 979 980 if (is_netdev) { 981 netdev = object; 982 name = netdev->id; 983 984 if (netdev->type == NET_CLIENT_DRIVER_NIC || 985 !net_client_init_fun[netdev->type]) { 986 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type", 987 "a netdev backend type"); 988 return -1; 989 } 990 } else { 991 const NetLegacy *net = object; 992 const NetLegacyOptions *opts = net->opts; 993 legacy.id = net->id; 994 netdev = &legacy; 995 /* missing optional values have been initialized to "all bits zero" */ 996 name = net->has_id ? net->id : net->name; 997 998 if (net->has_name) { 999 warn_report("The 'name' parameter is deprecated, use 'id' instead"); 1000 } 1001 1002 /* Map the old options to the new flat type */ 1003 switch (opts->type) { 1004 case NET_LEGACY_OPTIONS_TYPE_NONE: 1005 return 0; /* nothing to do */ 1006 case NET_LEGACY_OPTIONS_TYPE_NIC: 1007 legacy.type = NET_CLIENT_DRIVER_NIC; 1008 legacy.u.nic = opts->u.nic; 1009 break; 1010 case NET_LEGACY_OPTIONS_TYPE_USER: 1011 legacy.type = NET_CLIENT_DRIVER_USER; 1012 legacy.u.user = opts->u.user; 1013 break; 1014 case NET_LEGACY_OPTIONS_TYPE_TAP: 1015 legacy.type = NET_CLIENT_DRIVER_TAP; 1016 legacy.u.tap = opts->u.tap; 1017 break; 1018 case NET_LEGACY_OPTIONS_TYPE_L2TPV3: 1019 legacy.type = NET_CLIENT_DRIVER_L2TPV3; 1020 legacy.u.l2tpv3 = opts->u.l2tpv3; 1021 break; 1022 case NET_LEGACY_OPTIONS_TYPE_SOCKET: 1023 legacy.type = NET_CLIENT_DRIVER_SOCKET; 1024 legacy.u.socket = opts->u.socket; 1025 break; 1026 case NET_LEGACY_OPTIONS_TYPE_VDE: 1027 legacy.type = NET_CLIENT_DRIVER_VDE; 1028 legacy.u.vde = opts->u.vde; 1029 break; 1030 case NET_LEGACY_OPTIONS_TYPE_BRIDGE: 1031 legacy.type = NET_CLIENT_DRIVER_BRIDGE; 1032 legacy.u.bridge = opts->u.bridge; 1033 break; 1034 case NET_LEGACY_OPTIONS_TYPE_NETMAP: 1035 legacy.type = NET_CLIENT_DRIVER_NETMAP; 1036 legacy.u.netmap = opts->u.netmap; 1037 break; 1038 case NET_LEGACY_OPTIONS_TYPE_VHOST_USER: 1039 legacy.type = NET_CLIENT_DRIVER_VHOST_USER; 1040 legacy.u.vhost_user = opts->u.vhost_user; 1041 break; 1042 default: 1043 abort(); 1044 } 1045 1046 if (!net_client_init_fun[netdev->type]) { 1047 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type", 1048 "a net backend type (maybe it is not compiled " 1049 "into this binary)"); 1050 return -1; 1051 } 1052 1053 /* Do not add to a hub if it's a nic with a netdev= parameter. */ 1054 if (netdev->type != NET_CLIENT_DRIVER_NIC || 1055 !opts->u.nic.has_netdev) { 1056 peer = net_hub_add_port(0, NULL, NULL); 1057 } 1058 } 1059 1060 if (net_client_init_fun[netdev->type](netdev, name, peer, errp) < 0) { 1061 /* FIXME drop when all init functions store an Error */ 1062 if (errp && !*errp) { 1063 error_setg(errp, QERR_DEVICE_INIT_FAILED, 1064 NetClientDriver_str(netdev->type)); 1065 } 1066 return -1; 1067 } 1068 return 0; 1069 } 1070 1071 static void show_netdevs(void) 1072 { 1073 int idx; 1074 const char *available_netdevs[] = { 1075 "socket", 1076 "hubport", 1077 "tap", 1078 #ifdef CONFIG_SLIRP 1079 "user", 1080 #endif 1081 #ifdef CONFIG_L2TPV3 1082 "l2tpv3", 1083 #endif 1084 #ifdef CONFIG_VDE 1085 "vde", 1086 #endif 1087 #ifdef CONFIG_NET_BRIDGE 1088 "bridge", 1089 #endif 1090 #ifdef CONFIG_NETMAP 1091 "netmap", 1092 #endif 1093 #ifdef CONFIG_POSIX 1094 "vhost-user", 1095 #endif 1096 }; 1097 1098 printf("Available netdev backend types:\n"); 1099 for (idx = 0; idx < ARRAY_SIZE(available_netdevs); idx++) { 1100 puts(available_netdevs[idx]); 1101 } 1102 } 1103 1104 static int net_client_init(QemuOpts *opts, bool is_netdev, Error **errp) 1105 { 1106 void *object = NULL; 1107 Error *err = NULL; 1108 int ret = -1; 1109 Visitor *v = opts_visitor_new(opts); 1110 1111 const char *type = qemu_opt_get(opts, "type"); 1112 1113 if (is_netdev && type && is_help_option(type)) { 1114 show_netdevs(); 1115 exit(0); 1116 } else { 1117 /* Parse convenience option format ip6-net=fec0::0[/64] */ 1118 const char *ip6_net = qemu_opt_get(opts, "ipv6-net"); 1119 1120 if (ip6_net) { 1121 char buf[strlen(ip6_net) + 1]; 1122 1123 if (get_str_sep(buf, sizeof(buf), &ip6_net, '/') < 0) { 1124 /* Default 64bit prefix length. */ 1125 qemu_opt_set(opts, "ipv6-prefix", ip6_net, &error_abort); 1126 qemu_opt_set_number(opts, "ipv6-prefixlen", 64, &error_abort); 1127 } else { 1128 /* User-specified prefix length. */ 1129 unsigned long len; 1130 int err; 1131 1132 qemu_opt_set(opts, "ipv6-prefix", buf, &error_abort); 1133 err = qemu_strtoul(ip6_net, NULL, 10, &len); 1134 1135 if (err) { 1136 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1137 "ipv6-prefix", "a number"); 1138 } else { 1139 qemu_opt_set_number(opts, "ipv6-prefixlen", len, 1140 &error_abort); 1141 } 1142 } 1143 qemu_opt_unset(opts, "ipv6-net"); 1144 } 1145 } 1146 1147 if (is_netdev) { 1148 visit_type_Netdev(v, NULL, (Netdev **)&object, &err); 1149 } else { 1150 visit_type_NetLegacy(v, NULL, (NetLegacy **)&object, &err); 1151 } 1152 1153 if (!err) { 1154 ret = net_client_init1(object, is_netdev, &err); 1155 } 1156 1157 if (is_netdev) { 1158 qapi_free_Netdev(object); 1159 } else { 1160 qapi_free_NetLegacy(object); 1161 } 1162 1163 error_propagate(errp, err); 1164 visit_free(v); 1165 return ret; 1166 } 1167 1168 void netdev_add(QemuOpts *opts, Error **errp) 1169 { 1170 net_client_init(opts, true, errp); 1171 } 1172 1173 void qmp_netdev_add(QDict *qdict, QObject **ret, Error **errp) 1174 { 1175 Error *local_err = NULL; 1176 QemuOptsList *opts_list; 1177 QemuOpts *opts; 1178 1179 opts_list = qemu_find_opts_err("netdev", &local_err); 1180 if (local_err) { 1181 goto out; 1182 } 1183 1184 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err); 1185 if (local_err) { 1186 goto out; 1187 } 1188 1189 netdev_add(opts, &local_err); 1190 if (local_err) { 1191 qemu_opts_del(opts); 1192 goto out; 1193 } 1194 1195 out: 1196 error_propagate(errp, local_err); 1197 } 1198 1199 void qmp_netdev_del(const char *id, Error **errp) 1200 { 1201 NetClientState *nc; 1202 QemuOpts *opts; 1203 1204 nc = qemu_find_netdev(id); 1205 if (!nc) { 1206 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1207 "Device '%s' not found", id); 1208 return; 1209 } 1210 1211 opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id); 1212 if (!opts) { 1213 error_setg(errp, "Device '%s' is not a netdev", id); 1214 return; 1215 } 1216 1217 qemu_del_net_client(nc); 1218 qemu_opts_del(opts); 1219 } 1220 1221 static void netfilter_print_info(Monitor *mon, NetFilterState *nf) 1222 { 1223 char *str; 1224 ObjectProperty *prop; 1225 ObjectPropertyIterator iter; 1226 Visitor *v; 1227 1228 /* generate info str */ 1229 object_property_iter_init(&iter, OBJECT(nf)); 1230 while ((prop = object_property_iter_next(&iter))) { 1231 if (!strcmp(prop->name, "type")) { 1232 continue; 1233 } 1234 v = string_output_visitor_new(false, &str); 1235 object_property_get(OBJECT(nf), v, prop->name, NULL); 1236 visit_complete(v, &str); 1237 visit_free(v); 1238 monitor_printf(mon, ",%s=%s", prop->name, str); 1239 g_free(str); 1240 } 1241 monitor_printf(mon, "\n"); 1242 } 1243 1244 void print_net_client(Monitor *mon, NetClientState *nc) 1245 { 1246 NetFilterState *nf; 1247 1248 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name, 1249 nc->queue_index, 1250 NetClientDriver_str(nc->info->type), 1251 nc->info_str); 1252 if (!QTAILQ_EMPTY(&nc->filters)) { 1253 monitor_printf(mon, "filters:\n"); 1254 } 1255 QTAILQ_FOREACH(nf, &nc->filters, next) { 1256 char *path = object_get_canonical_path_component(OBJECT(nf)); 1257 1258 monitor_printf(mon, " - %s: type=%s", path, 1259 object_get_typename(OBJECT(nf))); 1260 netfilter_print_info(mon, nf); 1261 g_free(path); 1262 } 1263 } 1264 1265 RxFilterInfoList *qmp_query_rx_filter(bool has_name, const char *name, 1266 Error **errp) 1267 { 1268 NetClientState *nc; 1269 RxFilterInfoList *filter_list = NULL, *last_entry = NULL; 1270 1271 QTAILQ_FOREACH(nc, &net_clients, next) { 1272 RxFilterInfoList *entry; 1273 RxFilterInfo *info; 1274 1275 if (has_name && strcmp(nc->name, name) != 0) { 1276 continue; 1277 } 1278 1279 /* only query rx-filter information of NIC */ 1280 if (nc->info->type != NET_CLIENT_DRIVER_NIC) { 1281 if (has_name) { 1282 error_setg(errp, "net client(%s) isn't a NIC", name); 1283 return NULL; 1284 } 1285 continue; 1286 } 1287 1288 /* only query information on queue 0 since the info is per nic, 1289 * not per queue 1290 */ 1291 if (nc->queue_index != 0) 1292 continue; 1293 1294 if (nc->info->query_rx_filter) { 1295 info = nc->info->query_rx_filter(nc); 1296 entry = g_malloc0(sizeof(*entry)); 1297 entry->value = info; 1298 1299 if (!filter_list) { 1300 filter_list = entry; 1301 } else { 1302 last_entry->next = entry; 1303 } 1304 last_entry = entry; 1305 } else if (has_name) { 1306 error_setg(errp, "net client(%s) doesn't support" 1307 " rx-filter querying", name); 1308 return NULL; 1309 } 1310 1311 if (has_name) { 1312 break; 1313 } 1314 } 1315 1316 if (filter_list == NULL && has_name) { 1317 error_setg(errp, "invalid net client name: %s", name); 1318 } 1319 1320 return filter_list; 1321 } 1322 1323 void hmp_info_network(Monitor *mon, const QDict *qdict) 1324 { 1325 NetClientState *nc, *peer; 1326 NetClientDriver type; 1327 1328 net_hub_info(mon); 1329 1330 QTAILQ_FOREACH(nc, &net_clients, next) { 1331 peer = nc->peer; 1332 type = nc->info->type; 1333 1334 /* Skip if already printed in hub info */ 1335 if (net_hub_id_for_client(nc, NULL) == 0) { 1336 continue; 1337 } 1338 1339 if (!peer || type == NET_CLIENT_DRIVER_NIC) { 1340 print_net_client(mon, nc); 1341 } /* else it's a netdev connected to a NIC, printed with the NIC */ 1342 if (peer && type == NET_CLIENT_DRIVER_NIC) { 1343 monitor_printf(mon, " \\ "); 1344 print_net_client(mon, peer); 1345 } 1346 } 1347 } 1348 1349 void colo_notify_filters_event(int event, Error **errp) 1350 { 1351 NetClientState *nc; 1352 NetFilterState *nf; 1353 NetFilterClass *nfc = NULL; 1354 Error *local_err = NULL; 1355 1356 QTAILQ_FOREACH(nc, &net_clients, next) { 1357 QTAILQ_FOREACH(nf, &nc->filters, next) { 1358 nfc = NETFILTER_GET_CLASS(OBJECT(nf)); 1359 nfc->handle_event(nf, event, &local_err); 1360 if (local_err) { 1361 error_propagate(errp, local_err); 1362 return; 1363 } 1364 } 1365 } 1366 } 1367 1368 void qmp_set_link(const char *name, bool up, Error **errp) 1369 { 1370 NetClientState *ncs[MAX_QUEUE_NUM]; 1371 NetClientState *nc; 1372 int queues, i; 1373 1374 queues = qemu_find_net_clients_except(name, ncs, 1375 NET_CLIENT_DRIVER__MAX, 1376 MAX_QUEUE_NUM); 1377 1378 if (queues == 0) { 1379 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1380 "Device '%s' not found", name); 1381 return; 1382 } 1383 nc = ncs[0]; 1384 1385 for (i = 0; i < queues; i++) { 1386 ncs[i]->link_down = !up; 1387 } 1388 1389 if (nc->info->link_status_changed) { 1390 nc->info->link_status_changed(nc); 1391 } 1392 1393 if (nc->peer) { 1394 /* Change peer link only if the peer is NIC and then notify peer. 1395 * If the peer is a HUBPORT or a backend, we do not change the 1396 * link status. 1397 * 1398 * This behavior is compatible with qemu hubs where there could be 1399 * multiple clients that can still communicate with each other in 1400 * disconnected mode. For now maintain this compatibility. 1401 */ 1402 if (nc->peer->info->type == NET_CLIENT_DRIVER_NIC) { 1403 for (i = 0; i < queues; i++) { 1404 ncs[i]->peer->link_down = !up; 1405 } 1406 } 1407 if (nc->peer->info->link_status_changed) { 1408 nc->peer->info->link_status_changed(nc->peer); 1409 } 1410 } 1411 } 1412 1413 static void net_vm_change_state_handler(void *opaque, int running, 1414 RunState state) 1415 { 1416 NetClientState *nc; 1417 NetClientState *tmp; 1418 1419 QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) { 1420 if (running) { 1421 /* Flush queued packets and wake up backends. */ 1422 if (nc->peer && qemu_can_send_packet(nc)) { 1423 qemu_flush_queued_packets(nc->peer); 1424 } 1425 } else { 1426 /* Complete all queued packets, to guarantee we don't modify 1427 * state later when VM is not running. 1428 */ 1429 qemu_flush_or_purge_queued_packets(nc, true); 1430 } 1431 } 1432 } 1433 1434 void net_cleanup(void) 1435 { 1436 NetClientState *nc; 1437 1438 /* We may del multiple entries during qemu_del_net_client(), 1439 * so QTAILQ_FOREACH_SAFE() is also not safe here. 1440 */ 1441 while (!QTAILQ_EMPTY(&net_clients)) { 1442 nc = QTAILQ_FIRST(&net_clients); 1443 if (nc->info->type == NET_CLIENT_DRIVER_NIC) { 1444 qemu_del_nic(qemu_get_nic(nc)); 1445 } else { 1446 qemu_del_net_client(nc); 1447 } 1448 } 1449 1450 qemu_del_vm_change_state_handler(net_change_state_entry); 1451 } 1452 1453 void net_check_clients(void) 1454 { 1455 NetClientState *nc; 1456 int i; 1457 1458 net_hub_check_clients(); 1459 1460 QTAILQ_FOREACH(nc, &net_clients, next) { 1461 if (!nc->peer) { 1462 warn_report("%s %s has no peer", 1463 nc->info->type == NET_CLIENT_DRIVER_NIC 1464 ? "nic" : "netdev", 1465 nc->name); 1466 } 1467 } 1468 1469 /* Check that all NICs requested via -net nic actually got created. 1470 * NICs created via -device don't need to be checked here because 1471 * they are always instantiated. 1472 */ 1473 for (i = 0; i < MAX_NICS; i++) { 1474 NICInfo *nd = &nd_table[i]; 1475 if (nd->used && !nd->instantiated) { 1476 warn_report("requested NIC (%s, model %s) " 1477 "was not created (not supported by this machine?)", 1478 nd->name ? nd->name : "anonymous", 1479 nd->model ? nd->model : "unspecified"); 1480 } 1481 } 1482 } 1483 1484 static int net_init_client(void *dummy, QemuOpts *opts, Error **errp) 1485 { 1486 return net_client_init(opts, false, errp); 1487 } 1488 1489 static int net_init_netdev(void *dummy, QemuOpts *opts, Error **errp) 1490 { 1491 return net_client_init(opts, true, errp); 1492 } 1493 1494 /* For the convenience "--nic" parameter */ 1495 static int net_param_nic(void *dummy, QemuOpts *opts, Error **errp) 1496 { 1497 char *mac, *nd_id; 1498 int idx, ret; 1499 NICInfo *ni; 1500 const char *type; 1501 1502 type = qemu_opt_get(opts, "type"); 1503 if (type && g_str_equal(type, "none")) { 1504 return 0; /* Nothing to do, default_net is cleared in vl.c */ 1505 } 1506 1507 idx = nic_get_free_idx(); 1508 if (idx == -1 || nb_nics >= MAX_NICS) { 1509 error_setg(errp, "no more on-board/default NIC slots available"); 1510 return -1; 1511 } 1512 1513 if (!type) { 1514 qemu_opt_set(opts, "type", "user", &error_abort); 1515 } 1516 1517 ni = &nd_table[idx]; 1518 memset(ni, 0, sizeof(*ni)); 1519 ni->model = qemu_opt_get_del(opts, "model"); 1520 1521 /* Create an ID if the user did not specify one */ 1522 nd_id = g_strdup(qemu_opts_id(opts)); 1523 if (!nd_id) { 1524 nd_id = g_strdup_printf("__org.qemu.nic%i\n", idx); 1525 qemu_opts_set_id(opts, nd_id); 1526 } 1527 1528 /* Handle MAC address */ 1529 mac = qemu_opt_get_del(opts, "mac"); 1530 if (mac) { 1531 ret = net_parse_macaddr(ni->macaddr.a, mac); 1532 g_free(mac); 1533 if (ret) { 1534 error_setg(errp, "invalid syntax for ethernet address"); 1535 goto out; 1536 } 1537 if (is_multicast_ether_addr(ni->macaddr.a)) { 1538 error_setg(errp, "NIC cannot have multicast MAC address"); 1539 ret = -1; 1540 goto out; 1541 } 1542 } 1543 qemu_macaddr_default_if_unset(&ni->macaddr); 1544 1545 ret = net_client_init(opts, true, errp); 1546 if (ret == 0) { 1547 ni->netdev = qemu_find_netdev(nd_id); 1548 ni->used = true; 1549 nb_nics++; 1550 } 1551 1552 out: 1553 g_free(nd_id); 1554 return ret; 1555 } 1556 1557 int net_init_clients(Error **errp) 1558 { 1559 net_change_state_entry = 1560 qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL); 1561 1562 QTAILQ_INIT(&net_clients); 1563 1564 if (qemu_opts_foreach(qemu_find_opts("netdev"), 1565 net_init_netdev, NULL, errp)) { 1566 return -1; 1567 } 1568 1569 if (qemu_opts_foreach(qemu_find_opts("nic"), net_param_nic, NULL, errp)) { 1570 return -1; 1571 } 1572 1573 if (qemu_opts_foreach(qemu_find_opts("net"), net_init_client, NULL, errp)) { 1574 return -1; 1575 } 1576 1577 return 0; 1578 } 1579 1580 int net_client_parse(QemuOptsList *opts_list, const char *optarg) 1581 { 1582 if (!qemu_opts_parse_noisily(opts_list, optarg, true)) { 1583 return -1; 1584 } 1585 1586 return 0; 1587 } 1588 1589 /* From FreeBSD */ 1590 /* XXX: optimize */ 1591 uint32_t net_crc32(const uint8_t *p, int len) 1592 { 1593 uint32_t crc; 1594 int carry, i, j; 1595 uint8_t b; 1596 1597 crc = 0xffffffff; 1598 for (i = 0; i < len; i++) { 1599 b = *p++; 1600 for (j = 0; j < 8; j++) { 1601 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01); 1602 crc <<= 1; 1603 b >>= 1; 1604 if (carry) { 1605 crc = ((crc ^ POLYNOMIAL_BE) | carry); 1606 } 1607 } 1608 } 1609 1610 return crc; 1611 } 1612 1613 uint32_t net_crc32_le(const uint8_t *p, int len) 1614 { 1615 uint32_t crc; 1616 int carry, i, j; 1617 uint8_t b; 1618 1619 crc = 0xffffffff; 1620 for (i = 0; i < len; i++) { 1621 b = *p++; 1622 for (j = 0; j < 8; j++) { 1623 carry = (crc & 0x1) ^ (b & 0x01); 1624 crc >>= 1; 1625 b >>= 1; 1626 if (carry) { 1627 crc ^= POLYNOMIAL_LE; 1628 } 1629 } 1630 } 1631 1632 return crc; 1633 } 1634 1635 QemuOptsList qemu_netdev_opts = { 1636 .name = "netdev", 1637 .implied_opt_name = "type", 1638 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head), 1639 .desc = { 1640 /* 1641 * no elements => accept any params 1642 * validation will happen later 1643 */ 1644 { /* end of list */ } 1645 }, 1646 }; 1647 1648 QemuOptsList qemu_nic_opts = { 1649 .name = "nic", 1650 .implied_opt_name = "type", 1651 .head = QTAILQ_HEAD_INITIALIZER(qemu_nic_opts.head), 1652 .desc = { 1653 /* 1654 * no elements => accept any params 1655 * validation will happen later 1656 */ 1657 { /* end of list */ } 1658 }, 1659 }; 1660 1661 QemuOptsList qemu_net_opts = { 1662 .name = "net", 1663 .implied_opt_name = "type", 1664 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head), 1665 .desc = { 1666 /* 1667 * no elements => accept any params 1668 * validation will happen later 1669 */ 1670 { /* end of list */ } 1671 }, 1672 }; 1673 1674 void net_socket_rs_init(SocketReadState *rs, 1675 SocketReadStateFinalize *finalize, 1676 bool vnet_hdr) 1677 { 1678 rs->state = 0; 1679 rs->vnet_hdr = vnet_hdr; 1680 rs->index = 0; 1681 rs->packet_len = 0; 1682 rs->vnet_hdr_len = 0; 1683 memset(rs->buf, 0, sizeof(rs->buf)); 1684 rs->finalize = finalize; 1685 } 1686 1687 /* 1688 * Returns 1689 * 0: success 1690 * -1: error occurs 1691 */ 1692 int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size) 1693 { 1694 unsigned int l; 1695 1696 while (size > 0) { 1697 /* Reassemble a packet from the network. 1698 * 0 = getting length. 1699 * 1 = getting vnet header length. 1700 * 2 = getting data. 1701 */ 1702 switch (rs->state) { 1703 case 0: 1704 l = 4 - rs->index; 1705 if (l > size) { 1706 l = size; 1707 } 1708 memcpy(rs->buf + rs->index, buf, l); 1709 buf += l; 1710 size -= l; 1711 rs->index += l; 1712 if (rs->index == 4) { 1713 /* got length */ 1714 rs->packet_len = ntohl(*(uint32_t *)rs->buf); 1715 rs->index = 0; 1716 if (rs->vnet_hdr) { 1717 rs->state = 1; 1718 } else { 1719 rs->state = 2; 1720 rs->vnet_hdr_len = 0; 1721 } 1722 } 1723 break; 1724 case 1: 1725 l = 4 - rs->index; 1726 if (l > size) { 1727 l = size; 1728 } 1729 memcpy(rs->buf + rs->index, buf, l); 1730 buf += l; 1731 size -= l; 1732 rs->index += l; 1733 if (rs->index == 4) { 1734 /* got vnet header length */ 1735 rs->vnet_hdr_len = ntohl(*(uint32_t *)rs->buf); 1736 rs->index = 0; 1737 rs->state = 2; 1738 } 1739 break; 1740 case 2: 1741 l = rs->packet_len - rs->index; 1742 if (l > size) { 1743 l = size; 1744 } 1745 if (rs->index + l <= sizeof(rs->buf)) { 1746 memcpy(rs->buf + rs->index, buf, l); 1747 } else { 1748 fprintf(stderr, "serious error: oversized packet received," 1749 "connection terminated.\n"); 1750 rs->index = rs->state = 0; 1751 return -1; 1752 } 1753 1754 rs->index += l; 1755 buf += l; 1756 size -= l; 1757 if (rs->index >= rs->packet_len) { 1758 rs->index = 0; 1759 rs->state = 0; 1760 assert(rs->finalize); 1761 rs->finalize(rs); 1762 } 1763 break; 1764 } 1765 } 1766 1767 assert(size == 0); 1768 return 0; 1769 } 1770