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-common.h" 36 #include "qemu/help_option.h" 37 #include "qapi/qmp/qerror.h" 38 #include "qemu/error-report.h" 39 #include "qemu/sockets.h" 40 #include "qemu/cutils.h" 41 #include "qemu/config-file.h" 42 #include "qmp-commands.h" 43 #include "hw/qdev.h" 44 #include "qemu/iov.h" 45 #include "qemu/main-loop.h" 46 #include "qapi-visit.h" 47 #include "qapi/error.h" 48 #include "qapi/opts-visitor.h" 49 #include "sysemu/sysemu.h" 50 #include "sysemu/qtest.h" 51 #include "net/filter.h" 52 #include "qapi/string-output-visitor.h" 53 54 /* Net bridge is currently not supported for W32. */ 55 #if !defined(_WIN32) 56 # define CONFIG_NET_BRIDGE 57 #endif 58 59 static VMChangeStateEntry *net_change_state_entry; 60 static QTAILQ_HEAD(, NetClientState) net_clients; 61 62 const char *host_net_devices[] = { 63 "tap", 64 "socket", 65 "dump", 66 #ifdef CONFIG_NET_BRIDGE 67 "bridge", 68 #endif 69 #ifdef CONFIG_NETMAP 70 "netmap", 71 #endif 72 #ifdef CONFIG_SLIRP 73 "user", 74 #endif 75 #ifdef CONFIG_VDE 76 "vde", 77 #endif 78 "vhost-user", 79 NULL, 80 }; 81 82 /***********************************************************/ 83 /* network device redirectors */ 84 85 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep) 86 { 87 const char *p, *p1; 88 int len; 89 p = *pp; 90 p1 = strchr(p, sep); 91 if (!p1) 92 return -1; 93 len = p1 - p; 94 p1++; 95 if (buf_size > 0) { 96 if (len > buf_size - 1) 97 len = buf_size - 1; 98 memcpy(buf, p, len); 99 buf[len] = '\0'; 100 } 101 *pp = p1; 102 return 0; 103 } 104 105 int parse_host_port(struct sockaddr_in *saddr, const char *str, 106 Error **errp) 107 { 108 char buf[512]; 109 struct hostent *he; 110 const char *p, *r; 111 int port; 112 113 p = str; 114 if (get_str_sep(buf, sizeof(buf), &p, ':') < 0) { 115 error_setg(errp, "host address '%s' doesn't contain ':' " 116 "separating host from port", str); 117 return -1; 118 } 119 saddr->sin_family = AF_INET; 120 if (buf[0] == '\0') { 121 saddr->sin_addr.s_addr = 0; 122 } else { 123 if (qemu_isdigit(buf[0])) { 124 if (!inet_aton(buf, &saddr->sin_addr)) { 125 error_setg(errp, "host address '%s' is not a valid " 126 "IPv4 address", buf); 127 return -1; 128 } 129 } else { 130 he = gethostbyname(buf); 131 if (he == NULL) { 132 error_setg(errp, "can't resolve host address '%s'", buf); 133 return - 1; 134 } 135 saddr->sin_addr = *(struct in_addr *)he->h_addr; 136 } 137 } 138 port = strtol(p, (char **)&r, 0); 139 if (r == p) { 140 error_setg(errp, "port number '%s' is invalid", p); 141 return -1; 142 } 143 saddr->sin_port = htons(port); 144 return 0; 145 } 146 147 char *qemu_mac_strdup_printf(const uint8_t *macaddr) 148 { 149 return g_strdup_printf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x", 150 macaddr[0], macaddr[1], macaddr[2], 151 macaddr[3], macaddr[4], macaddr[5]); 152 } 153 154 void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]) 155 { 156 snprintf(nc->info_str, sizeof(nc->info_str), 157 "model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x", 158 nc->model, 159 macaddr[0], macaddr[1], macaddr[2], 160 macaddr[3], macaddr[4], macaddr[5]); 161 } 162 163 static int mac_table[256] = {0}; 164 165 static void qemu_macaddr_set_used(MACAddr *macaddr) 166 { 167 int index; 168 169 for (index = 0x56; index < 0xFF; index++) { 170 if (macaddr->a[5] == index) { 171 mac_table[index]++; 172 } 173 } 174 } 175 176 static void qemu_macaddr_set_free(MACAddr *macaddr) 177 { 178 int index; 179 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } }; 180 181 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) { 182 return; 183 } 184 for (index = 0x56; index < 0xFF; index++) { 185 if (macaddr->a[5] == index) { 186 mac_table[index]--; 187 } 188 } 189 } 190 191 static int qemu_macaddr_get_free(void) 192 { 193 int index; 194 195 for (index = 0x56; index < 0xFF; index++) { 196 if (mac_table[index] == 0) { 197 return index; 198 } 199 } 200 201 return -1; 202 } 203 204 void qemu_macaddr_default_if_unset(MACAddr *macaddr) 205 { 206 static const MACAddr zero = { .a = { 0,0,0,0,0,0 } }; 207 static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } }; 208 209 if (memcmp(macaddr, &zero, sizeof(zero)) != 0) { 210 if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) { 211 return; 212 } else { 213 qemu_macaddr_set_used(macaddr); 214 return; 215 } 216 } 217 218 macaddr->a[0] = 0x52; 219 macaddr->a[1] = 0x54; 220 macaddr->a[2] = 0x00; 221 macaddr->a[3] = 0x12; 222 macaddr->a[4] = 0x34; 223 macaddr->a[5] = qemu_macaddr_get_free(); 224 qemu_macaddr_set_used(macaddr); 225 } 226 227 /** 228 * Generate a name for net client 229 * 230 * Only net clients created with the legacy -net option and NICs need this. 231 */ 232 static char *assign_name(NetClientState *nc1, const char *model) 233 { 234 NetClientState *nc; 235 int id = 0; 236 237 QTAILQ_FOREACH(nc, &net_clients, next) { 238 if (nc == nc1) { 239 continue; 240 } 241 if (strcmp(nc->model, model) == 0) { 242 id++; 243 } 244 } 245 246 return g_strdup_printf("%s.%d", model, id); 247 } 248 249 static void qemu_net_client_destructor(NetClientState *nc) 250 { 251 g_free(nc); 252 } 253 254 static void qemu_net_client_setup(NetClientState *nc, 255 NetClientInfo *info, 256 NetClientState *peer, 257 const char *model, 258 const char *name, 259 NetClientDestructor *destructor) 260 { 261 nc->info = info; 262 nc->model = g_strdup(model); 263 if (name) { 264 nc->name = g_strdup(name); 265 } else { 266 nc->name = assign_name(nc, model); 267 } 268 269 if (peer) { 270 assert(!peer->peer); 271 nc->peer = peer; 272 peer->peer = nc; 273 } 274 QTAILQ_INSERT_TAIL(&net_clients, nc, next); 275 276 nc->incoming_queue = qemu_new_net_queue(qemu_deliver_packet_iov, nc); 277 nc->destructor = destructor; 278 QTAILQ_INIT(&nc->filters); 279 } 280 281 NetClientState *qemu_new_net_client(NetClientInfo *info, 282 NetClientState *peer, 283 const char *model, 284 const char *name) 285 { 286 NetClientState *nc; 287 288 assert(info->size >= sizeof(NetClientState)); 289 290 nc = g_malloc0(info->size); 291 qemu_net_client_setup(nc, info, peer, model, name, 292 qemu_net_client_destructor); 293 294 return nc; 295 } 296 297 NICState *qemu_new_nic(NetClientInfo *info, 298 NICConf *conf, 299 const char *model, 300 const char *name, 301 void *opaque) 302 { 303 NetClientState **peers = conf->peers.ncs; 304 NICState *nic; 305 int i, queues = MAX(1, conf->peers.queues); 306 307 assert(info->type == NET_CLIENT_DRIVER_NIC); 308 assert(info->size >= sizeof(NICState)); 309 310 nic = g_malloc0(info->size + sizeof(NetClientState) * queues); 311 nic->ncs = (void *)nic + info->size; 312 nic->conf = conf; 313 nic->opaque = opaque; 314 315 for (i = 0; i < queues; i++) { 316 qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name, 317 NULL); 318 nic->ncs[i].queue_index = i; 319 } 320 321 return nic; 322 } 323 324 NetClientState *qemu_get_subqueue(NICState *nic, int queue_index) 325 { 326 return nic->ncs + queue_index; 327 } 328 329 NetClientState *qemu_get_queue(NICState *nic) 330 { 331 return qemu_get_subqueue(nic, 0); 332 } 333 334 NICState *qemu_get_nic(NetClientState *nc) 335 { 336 NetClientState *nc0 = nc - nc->queue_index; 337 338 return (NICState *)((void *)nc0 - nc->info->size); 339 } 340 341 void *qemu_get_nic_opaque(NetClientState *nc) 342 { 343 NICState *nic = qemu_get_nic(nc); 344 345 return nic->opaque; 346 } 347 348 static void qemu_cleanup_net_client(NetClientState *nc) 349 { 350 QTAILQ_REMOVE(&net_clients, nc, next); 351 352 if (nc->info->cleanup) { 353 nc->info->cleanup(nc); 354 } 355 } 356 357 static void qemu_free_net_client(NetClientState *nc) 358 { 359 if (nc->incoming_queue) { 360 qemu_del_net_queue(nc->incoming_queue); 361 } 362 if (nc->peer) { 363 nc->peer->peer = NULL; 364 } 365 g_free(nc->name); 366 g_free(nc->model); 367 if (nc->destructor) { 368 nc->destructor(nc); 369 } 370 } 371 372 void qemu_del_net_client(NetClientState *nc) 373 { 374 NetClientState *ncs[MAX_QUEUE_NUM]; 375 int queues, i; 376 NetFilterState *nf, *next; 377 378 assert(nc->info->type != NET_CLIENT_DRIVER_NIC); 379 380 /* If the NetClientState belongs to a multiqueue backend, we will change all 381 * other NetClientStates also. 382 */ 383 queues = qemu_find_net_clients_except(nc->name, ncs, 384 NET_CLIENT_DRIVER_NIC, 385 MAX_QUEUE_NUM); 386 assert(queues != 0); 387 388 QTAILQ_FOREACH_SAFE(nf, &nc->filters, next, next) { 389 object_unparent(OBJECT(nf)); 390 } 391 392 /* If there is a peer NIC, delete and cleanup client, but do not free. */ 393 if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_NIC) { 394 NICState *nic = qemu_get_nic(nc->peer); 395 if (nic->peer_deleted) { 396 return; 397 } 398 nic->peer_deleted = true; 399 400 for (i = 0; i < queues; i++) { 401 ncs[i]->peer->link_down = true; 402 } 403 404 if (nc->peer->info->link_status_changed) { 405 nc->peer->info->link_status_changed(nc->peer); 406 } 407 408 for (i = 0; i < queues; i++) { 409 qemu_cleanup_net_client(ncs[i]); 410 } 411 412 return; 413 } 414 415 for (i = 0; i < queues; i++) { 416 qemu_cleanup_net_client(ncs[i]); 417 qemu_free_net_client(ncs[i]); 418 } 419 } 420 421 void qemu_del_nic(NICState *nic) 422 { 423 int i, queues = MAX(nic->conf->peers.queues, 1); 424 425 qemu_macaddr_set_free(&nic->conf->macaddr); 426 427 /* If this is a peer NIC and peer has already been deleted, free it now. */ 428 if (nic->peer_deleted) { 429 for (i = 0; i < queues; i++) { 430 qemu_free_net_client(qemu_get_subqueue(nic, i)->peer); 431 } 432 } 433 434 for (i = queues - 1; i >= 0; i--) { 435 NetClientState *nc = qemu_get_subqueue(nic, i); 436 437 qemu_cleanup_net_client(nc); 438 qemu_free_net_client(nc); 439 } 440 441 g_free(nic); 442 } 443 444 void qemu_foreach_nic(qemu_nic_foreach func, void *opaque) 445 { 446 NetClientState *nc; 447 448 QTAILQ_FOREACH(nc, &net_clients, next) { 449 if (nc->info->type == NET_CLIENT_DRIVER_NIC) { 450 if (nc->queue_index == 0) { 451 func(qemu_get_nic(nc), opaque); 452 } 453 } 454 } 455 } 456 457 bool qemu_has_ufo(NetClientState *nc) 458 { 459 if (!nc || !nc->info->has_ufo) { 460 return false; 461 } 462 463 return nc->info->has_ufo(nc); 464 } 465 466 bool qemu_has_vnet_hdr(NetClientState *nc) 467 { 468 if (!nc || !nc->info->has_vnet_hdr) { 469 return false; 470 } 471 472 return nc->info->has_vnet_hdr(nc); 473 } 474 475 bool qemu_has_vnet_hdr_len(NetClientState *nc, int len) 476 { 477 if (!nc || !nc->info->has_vnet_hdr_len) { 478 return false; 479 } 480 481 return nc->info->has_vnet_hdr_len(nc, len); 482 } 483 484 void qemu_using_vnet_hdr(NetClientState *nc, bool enable) 485 { 486 if (!nc || !nc->info->using_vnet_hdr) { 487 return; 488 } 489 490 nc->info->using_vnet_hdr(nc, enable); 491 } 492 493 void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6, 494 int ecn, int ufo) 495 { 496 if (!nc || !nc->info->set_offload) { 497 return; 498 } 499 500 nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo); 501 } 502 503 void qemu_set_vnet_hdr_len(NetClientState *nc, int len) 504 { 505 if (!nc || !nc->info->set_vnet_hdr_len) { 506 return; 507 } 508 509 nc->vnet_hdr_len = len; 510 nc->info->set_vnet_hdr_len(nc, len); 511 } 512 513 int qemu_set_vnet_le(NetClientState *nc, bool is_le) 514 { 515 #ifdef HOST_WORDS_BIGENDIAN 516 if (!nc || !nc->info->set_vnet_le) { 517 return -ENOSYS; 518 } 519 520 return nc->info->set_vnet_le(nc, is_le); 521 #else 522 return 0; 523 #endif 524 } 525 526 int qemu_set_vnet_be(NetClientState *nc, bool is_be) 527 { 528 #ifdef HOST_WORDS_BIGENDIAN 529 return 0; 530 #else 531 if (!nc || !nc->info->set_vnet_be) { 532 return -ENOSYS; 533 } 534 535 return nc->info->set_vnet_be(nc, is_be); 536 #endif 537 } 538 539 int qemu_can_send_packet(NetClientState *sender) 540 { 541 int vm_running = runstate_is_running(); 542 543 if (!vm_running) { 544 return 0; 545 } 546 547 if (!sender->peer) { 548 return 1; 549 } 550 551 if (sender->peer->receive_disabled) { 552 return 0; 553 } else if (sender->peer->info->can_receive && 554 !sender->peer->info->can_receive(sender->peer)) { 555 return 0; 556 } 557 return 1; 558 } 559 560 static ssize_t filter_receive_iov(NetClientState *nc, 561 NetFilterDirection direction, 562 NetClientState *sender, 563 unsigned flags, 564 const struct iovec *iov, 565 int iovcnt, 566 NetPacketSent *sent_cb) 567 { 568 ssize_t ret = 0; 569 NetFilterState *nf = NULL; 570 571 if (direction == NET_FILTER_DIRECTION_TX) { 572 QTAILQ_FOREACH(nf, &nc->filters, next) { 573 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov, 574 iovcnt, sent_cb); 575 if (ret) { 576 return ret; 577 } 578 } 579 } else { 580 QTAILQ_FOREACH_REVERSE(nf, &nc->filters, NetFilterHead, next) { 581 ret = qemu_netfilter_receive(nf, direction, sender, flags, iov, 582 iovcnt, sent_cb); 583 if (ret) { 584 return ret; 585 } 586 } 587 } 588 589 return ret; 590 } 591 592 static ssize_t filter_receive(NetClientState *nc, 593 NetFilterDirection direction, 594 NetClientState *sender, 595 unsigned flags, 596 const uint8_t *data, 597 size_t size, 598 NetPacketSent *sent_cb) 599 { 600 struct iovec iov = { 601 .iov_base = (void *)data, 602 .iov_len = size 603 }; 604 605 return filter_receive_iov(nc, direction, sender, flags, &iov, 1, sent_cb); 606 } 607 608 void qemu_purge_queued_packets(NetClientState *nc) 609 { 610 if (!nc->peer) { 611 return; 612 } 613 614 qemu_net_queue_purge(nc->peer->incoming_queue, nc); 615 } 616 617 static 618 void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge) 619 { 620 nc->receive_disabled = 0; 621 622 if (nc->peer && nc->peer->info->type == NET_CLIENT_DRIVER_HUBPORT) { 623 if (net_hub_flush(nc->peer)) { 624 qemu_notify_event(); 625 } 626 } 627 if (qemu_net_queue_flush(nc->incoming_queue)) { 628 /* We emptied the queue successfully, signal to the IO thread to repoll 629 * the file descriptor (for tap, for example). 630 */ 631 qemu_notify_event(); 632 } else if (purge) { 633 /* Unable to empty the queue, purge remaining packets */ 634 qemu_net_queue_purge(nc->incoming_queue, nc); 635 } 636 } 637 638 void qemu_flush_queued_packets(NetClientState *nc) 639 { 640 qemu_flush_or_purge_queued_packets(nc, false); 641 } 642 643 static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender, 644 unsigned flags, 645 const uint8_t *buf, int size, 646 NetPacketSent *sent_cb) 647 { 648 NetQueue *queue; 649 int ret; 650 651 #ifdef DEBUG_NET 652 printf("qemu_send_packet_async:\n"); 653 qemu_hexdump((const char *)buf, stdout, "net", size); 654 #endif 655 656 if (sender->link_down || !sender->peer) { 657 return size; 658 } 659 660 /* Let filters handle the packet first */ 661 ret = filter_receive(sender, NET_FILTER_DIRECTION_TX, 662 sender, flags, buf, size, sent_cb); 663 if (ret) { 664 return ret; 665 } 666 667 ret = filter_receive(sender->peer, NET_FILTER_DIRECTION_RX, 668 sender, flags, buf, size, sent_cb); 669 if (ret) { 670 return ret; 671 } 672 673 queue = sender->peer->incoming_queue; 674 675 return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb); 676 } 677 678 ssize_t qemu_send_packet_async(NetClientState *sender, 679 const uint8_t *buf, int size, 680 NetPacketSent *sent_cb) 681 { 682 return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE, 683 buf, size, sent_cb); 684 } 685 686 void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size) 687 { 688 qemu_send_packet_async(nc, buf, size, NULL); 689 } 690 691 ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size) 692 { 693 return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW, 694 buf, size, NULL); 695 } 696 697 static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov, 698 int iovcnt, unsigned flags) 699 { 700 uint8_t *buf = NULL; 701 uint8_t *buffer; 702 size_t offset; 703 ssize_t ret; 704 705 if (iovcnt == 1) { 706 buffer = iov[0].iov_base; 707 offset = iov[0].iov_len; 708 } else { 709 offset = iov_size(iov, iovcnt); 710 if (offset > NET_BUFSIZE) { 711 return -1; 712 } 713 buf = g_malloc(offset); 714 buffer = buf; 715 offset = iov_to_buf(iov, iovcnt, 0, buf, offset); 716 } 717 718 if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) { 719 ret = nc->info->receive_raw(nc, buffer, offset); 720 } else { 721 ret = nc->info->receive(nc, buffer, offset); 722 } 723 724 g_free(buf); 725 return ret; 726 } 727 728 ssize_t qemu_deliver_packet_iov(NetClientState *sender, 729 unsigned flags, 730 const struct iovec *iov, 731 int iovcnt, 732 void *opaque) 733 { 734 NetClientState *nc = opaque; 735 int ret; 736 737 if (nc->link_down) { 738 return iov_size(iov, iovcnt); 739 } 740 741 if (nc->receive_disabled) { 742 return 0; 743 } 744 745 if (nc->info->receive_iov && !(flags & QEMU_NET_PACKET_FLAG_RAW)) { 746 ret = nc->info->receive_iov(nc, iov, iovcnt); 747 } else { 748 ret = nc_sendv_compat(nc, iov, iovcnt, flags); 749 } 750 751 if (ret == 0) { 752 nc->receive_disabled = 1; 753 } 754 755 return ret; 756 } 757 758 ssize_t qemu_sendv_packet_async(NetClientState *sender, 759 const struct iovec *iov, int iovcnt, 760 NetPacketSent *sent_cb) 761 { 762 NetQueue *queue; 763 int ret; 764 765 if (sender->link_down || !sender->peer) { 766 return iov_size(iov, iovcnt); 767 } 768 769 /* Let filters handle the packet first */ 770 ret = filter_receive_iov(sender, NET_FILTER_DIRECTION_TX, sender, 771 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb); 772 if (ret) { 773 return ret; 774 } 775 776 ret = filter_receive_iov(sender->peer, NET_FILTER_DIRECTION_RX, sender, 777 QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb); 778 if (ret) { 779 return ret; 780 } 781 782 queue = sender->peer->incoming_queue; 783 784 return qemu_net_queue_send_iov(queue, sender, 785 QEMU_NET_PACKET_FLAG_NONE, 786 iov, iovcnt, sent_cb); 787 } 788 789 ssize_t 790 qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt) 791 { 792 return qemu_sendv_packet_async(nc, iov, iovcnt, NULL); 793 } 794 795 NetClientState *qemu_find_netdev(const char *id) 796 { 797 NetClientState *nc; 798 799 QTAILQ_FOREACH(nc, &net_clients, next) { 800 if (nc->info->type == NET_CLIENT_DRIVER_NIC) 801 continue; 802 if (!strcmp(nc->name, id)) { 803 return nc; 804 } 805 } 806 807 return NULL; 808 } 809 810 int qemu_find_net_clients_except(const char *id, NetClientState **ncs, 811 NetClientDriver type, int max) 812 { 813 NetClientState *nc; 814 int ret = 0; 815 816 QTAILQ_FOREACH(nc, &net_clients, next) { 817 if (nc->info->type == type) { 818 continue; 819 } 820 if (!id || !strcmp(nc->name, id)) { 821 if (ret < max) { 822 ncs[ret] = nc; 823 } 824 ret++; 825 } 826 } 827 828 return ret; 829 } 830 831 static int nic_get_free_idx(void) 832 { 833 int index; 834 835 for (index = 0; index < MAX_NICS; index++) 836 if (!nd_table[index].used) 837 return index; 838 return -1; 839 } 840 841 int qemu_show_nic_models(const char *arg, const char *const *models) 842 { 843 int i; 844 845 if (!arg || !is_help_option(arg)) { 846 return 0; 847 } 848 849 fprintf(stderr, "qemu: Supported NIC models: "); 850 for (i = 0 ; models[i]; i++) 851 fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n'); 852 return 1; 853 } 854 855 void qemu_check_nic_model(NICInfo *nd, const char *model) 856 { 857 const char *models[2]; 858 859 models[0] = model; 860 models[1] = NULL; 861 862 if (qemu_show_nic_models(nd->model, models)) 863 exit(0); 864 if (qemu_find_nic_model(nd, models, model) < 0) 865 exit(1); 866 } 867 868 int qemu_find_nic_model(NICInfo *nd, const char * const *models, 869 const char *default_model) 870 { 871 int i; 872 873 if (!nd->model) 874 nd->model = g_strdup(default_model); 875 876 for (i = 0 ; models[i]; i++) { 877 if (strcmp(nd->model, models[i]) == 0) 878 return i; 879 } 880 881 error_report("Unsupported NIC model: %s", nd->model); 882 return -1; 883 } 884 885 static int net_init_nic(const Netdev *netdev, const char *name, 886 NetClientState *peer, Error **errp) 887 { 888 int idx; 889 NICInfo *nd; 890 const NetLegacyNicOptions *nic; 891 892 assert(netdev->type == NET_CLIENT_DRIVER_NIC); 893 nic = &netdev->u.nic; 894 895 idx = nic_get_free_idx(); 896 if (idx == -1 || nb_nics >= MAX_NICS) { 897 error_setg(errp, "too many NICs"); 898 return -1; 899 } 900 901 nd = &nd_table[idx]; 902 903 memset(nd, 0, sizeof(*nd)); 904 905 if (nic->has_netdev) { 906 nd->netdev = qemu_find_netdev(nic->netdev); 907 if (!nd->netdev) { 908 error_setg(errp, "netdev '%s' not found", nic->netdev); 909 return -1; 910 } 911 } else { 912 assert(peer); 913 nd->netdev = peer; 914 } 915 nd->name = g_strdup(name); 916 if (nic->has_model) { 917 nd->model = g_strdup(nic->model); 918 } 919 if (nic->has_addr) { 920 nd->devaddr = g_strdup(nic->addr); 921 } 922 923 if (nic->has_macaddr && 924 net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) { 925 error_setg(errp, "invalid syntax for ethernet address"); 926 return -1; 927 } 928 if (nic->has_macaddr && 929 is_multicast_ether_addr(nd->macaddr.a)) { 930 error_setg(errp, 931 "NIC cannot have multicast MAC address (odd 1st byte)"); 932 return -1; 933 } 934 qemu_macaddr_default_if_unset(&nd->macaddr); 935 936 if (nic->has_vectors) { 937 if (nic->vectors > 0x7ffffff) { 938 error_setg(errp, "invalid # of vectors: %"PRIu32, nic->vectors); 939 return -1; 940 } 941 nd->nvectors = nic->vectors; 942 } else { 943 nd->nvectors = DEV_NVECTORS_UNSPECIFIED; 944 } 945 946 nd->used = 1; 947 nb_nics++; 948 949 return idx; 950 } 951 952 953 static int (* const net_client_init_fun[NET_CLIENT_DRIVER__MAX])( 954 const Netdev *netdev, 955 const char *name, 956 NetClientState *peer, Error **errp) = { 957 [NET_CLIENT_DRIVER_NIC] = net_init_nic, 958 #ifdef CONFIG_SLIRP 959 [NET_CLIENT_DRIVER_USER] = net_init_slirp, 960 #endif 961 [NET_CLIENT_DRIVER_TAP] = net_init_tap, 962 [NET_CLIENT_DRIVER_SOCKET] = net_init_socket, 963 #ifdef CONFIG_VDE 964 [NET_CLIENT_DRIVER_VDE] = net_init_vde, 965 #endif 966 #ifdef CONFIG_NETMAP 967 [NET_CLIENT_DRIVER_NETMAP] = net_init_netmap, 968 #endif 969 [NET_CLIENT_DRIVER_DUMP] = net_init_dump, 970 #ifdef CONFIG_NET_BRIDGE 971 [NET_CLIENT_DRIVER_BRIDGE] = net_init_bridge, 972 #endif 973 [NET_CLIENT_DRIVER_HUBPORT] = net_init_hubport, 974 #ifdef CONFIG_VHOST_NET_USED 975 [NET_CLIENT_DRIVER_VHOST_USER] = net_init_vhost_user, 976 #endif 977 #ifdef CONFIG_L2TPV3 978 [NET_CLIENT_DRIVER_L2TPV3] = net_init_l2tpv3, 979 #endif 980 }; 981 982 983 static int net_client_init1(const void *object, bool is_netdev, Error **errp) 984 { 985 Netdev legacy = {0}; 986 const Netdev *netdev; 987 const char *name; 988 NetClientState *peer = NULL; 989 static bool vlan_warned; 990 991 if (is_netdev) { 992 netdev = object; 993 name = netdev->id; 994 995 if (netdev->type == NET_CLIENT_DRIVER_DUMP || 996 netdev->type == NET_CLIENT_DRIVER_NIC || 997 !net_client_init_fun[netdev->type]) { 998 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type", 999 "a netdev backend type"); 1000 return -1; 1001 } 1002 } else { 1003 const NetLegacy *net = object; 1004 const NetLegacyOptions *opts = net->opts; 1005 legacy.id = net->id; 1006 netdev = &legacy; 1007 /* missing optional values have been initialized to "all bits zero" */ 1008 name = net->has_id ? net->id : net->name; 1009 1010 /* Map the old options to the new flat type */ 1011 switch (opts->type) { 1012 case NET_LEGACY_OPTIONS_TYPE_NONE: 1013 return 0; /* nothing to do */ 1014 case NET_LEGACY_OPTIONS_TYPE_NIC: 1015 legacy.type = NET_CLIENT_DRIVER_NIC; 1016 legacy.u.nic = opts->u.nic; 1017 break; 1018 case NET_LEGACY_OPTIONS_TYPE_USER: 1019 legacy.type = NET_CLIENT_DRIVER_USER; 1020 legacy.u.user = opts->u.user; 1021 break; 1022 case NET_LEGACY_OPTIONS_TYPE_TAP: 1023 legacy.type = NET_CLIENT_DRIVER_TAP; 1024 legacy.u.tap = opts->u.tap; 1025 break; 1026 case NET_LEGACY_OPTIONS_TYPE_L2TPV3: 1027 legacy.type = NET_CLIENT_DRIVER_L2TPV3; 1028 legacy.u.l2tpv3 = opts->u.l2tpv3; 1029 break; 1030 case NET_LEGACY_OPTIONS_TYPE_SOCKET: 1031 legacy.type = NET_CLIENT_DRIVER_SOCKET; 1032 legacy.u.socket = opts->u.socket; 1033 break; 1034 case NET_LEGACY_OPTIONS_TYPE_VDE: 1035 legacy.type = NET_CLIENT_DRIVER_VDE; 1036 legacy.u.vde = opts->u.vde; 1037 break; 1038 case NET_LEGACY_OPTIONS_TYPE_DUMP: 1039 legacy.type = NET_CLIENT_DRIVER_DUMP; 1040 legacy.u.dump = opts->u.dump; 1041 break; 1042 case NET_LEGACY_OPTIONS_TYPE_BRIDGE: 1043 legacy.type = NET_CLIENT_DRIVER_BRIDGE; 1044 legacy.u.bridge = opts->u.bridge; 1045 break; 1046 case NET_LEGACY_OPTIONS_TYPE_NETMAP: 1047 legacy.type = NET_CLIENT_DRIVER_NETMAP; 1048 legacy.u.netmap = opts->u.netmap; 1049 break; 1050 case NET_LEGACY_OPTIONS_TYPE_VHOST_USER: 1051 legacy.type = NET_CLIENT_DRIVER_VHOST_USER; 1052 legacy.u.vhost_user = opts->u.vhost_user; 1053 break; 1054 default: 1055 abort(); 1056 } 1057 1058 if (!net_client_init_fun[netdev->type]) { 1059 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type", 1060 "a net backend type (maybe it is not compiled " 1061 "into this binary)"); 1062 return -1; 1063 } 1064 1065 /* Do not add to a vlan if it's a nic with a netdev= parameter. */ 1066 if (netdev->type != NET_CLIENT_DRIVER_NIC || 1067 !opts->u.nic.has_netdev) { 1068 peer = net_hub_add_port(net->has_vlan ? net->vlan : 0, NULL, NULL); 1069 } 1070 1071 if (net->has_vlan && !vlan_warned) { 1072 error_report("'vlan' is deprecated. Please use 'netdev' instead."); 1073 vlan_warned = true; 1074 } 1075 } 1076 1077 if (net_client_init_fun[netdev->type](netdev, name, peer, errp) < 0) { 1078 /* FIXME drop when all init functions store an Error */ 1079 if (errp && !*errp) { 1080 error_setg(errp, QERR_DEVICE_INIT_FAILED, 1081 NetClientDriver_str(netdev->type)); 1082 } 1083 return -1; 1084 } 1085 return 0; 1086 } 1087 1088 1089 int net_client_init(QemuOpts *opts, bool is_netdev, Error **errp) 1090 { 1091 void *object = NULL; 1092 Error *err = NULL; 1093 int ret = -1; 1094 Visitor *v = opts_visitor_new(opts); 1095 1096 { 1097 /* Parse convenience option format ip6-net=fec0::0[/64] */ 1098 const char *ip6_net = qemu_opt_get(opts, "ipv6-net"); 1099 1100 if (ip6_net) { 1101 char buf[strlen(ip6_net) + 1]; 1102 1103 if (get_str_sep(buf, sizeof(buf), &ip6_net, '/') < 0) { 1104 /* Default 64bit prefix length. */ 1105 qemu_opt_set(opts, "ipv6-prefix", ip6_net, &error_abort); 1106 qemu_opt_set_number(opts, "ipv6-prefixlen", 64, &error_abort); 1107 } else { 1108 /* User-specified prefix length. */ 1109 unsigned long len; 1110 int err; 1111 1112 qemu_opt_set(opts, "ipv6-prefix", buf, &error_abort); 1113 err = qemu_strtoul(ip6_net, NULL, 10, &len); 1114 1115 if (err) { 1116 error_setg(errp, QERR_INVALID_PARAMETER_VALUE, 1117 "ipv6-prefix", "a number"); 1118 } else { 1119 qemu_opt_set_number(opts, "ipv6-prefixlen", len, 1120 &error_abort); 1121 } 1122 } 1123 qemu_opt_unset(opts, "ipv6-net"); 1124 } 1125 } 1126 1127 if (is_netdev) { 1128 visit_type_Netdev(v, NULL, (Netdev **)&object, &err); 1129 } else { 1130 visit_type_NetLegacy(v, NULL, (NetLegacy **)&object, &err); 1131 } 1132 1133 if (!err) { 1134 ret = net_client_init1(object, is_netdev, &err); 1135 } 1136 1137 if (is_netdev) { 1138 qapi_free_Netdev(object); 1139 } else { 1140 qapi_free_NetLegacy(object); 1141 } 1142 1143 error_propagate(errp, err); 1144 visit_free(v); 1145 return ret; 1146 } 1147 1148 1149 static int net_host_check_device(const char *device) 1150 { 1151 int i; 1152 for (i = 0; host_net_devices[i]; i++) { 1153 if (!strncmp(host_net_devices[i], device, 1154 strlen(host_net_devices[i]))) { 1155 return 1; 1156 } 1157 } 1158 1159 return 0; 1160 } 1161 1162 void hmp_host_net_add(Monitor *mon, const QDict *qdict) 1163 { 1164 const char *device = qdict_get_str(qdict, "device"); 1165 const char *opts_str = qdict_get_try_str(qdict, "opts"); 1166 Error *local_err = NULL; 1167 QemuOpts *opts; 1168 static bool warned; 1169 1170 if (!warned && !qtest_enabled()) { 1171 error_report("host_net_add is deprecated, use netdev_add instead"); 1172 warned = true; 1173 } 1174 1175 if (!net_host_check_device(device)) { 1176 monitor_printf(mon, "invalid host network device %s\n", device); 1177 return; 1178 } 1179 1180 opts = qemu_opts_parse_noisily(qemu_find_opts("net"), 1181 opts_str ? opts_str : "", false); 1182 if (!opts) { 1183 return; 1184 } 1185 1186 qemu_opt_set(opts, "type", device, &error_abort); 1187 1188 net_client_init(opts, false, &local_err); 1189 if (local_err) { 1190 error_report_err(local_err); 1191 monitor_printf(mon, "adding host network device %s failed\n", device); 1192 } 1193 } 1194 1195 void hmp_host_net_remove(Monitor *mon, const QDict *qdict) 1196 { 1197 NetClientState *nc; 1198 int vlan_id = qdict_get_int(qdict, "vlan_id"); 1199 const char *device = qdict_get_str(qdict, "device"); 1200 static bool warned; 1201 1202 if (!warned && !qtest_enabled()) { 1203 error_report("host_net_remove is deprecated, use netdev_del instead"); 1204 warned = true; 1205 } 1206 1207 nc = net_hub_find_client_by_name(vlan_id, device); 1208 if (!nc) { 1209 error_report("Host network device '%s' on hub '%d' not found", 1210 device, vlan_id); 1211 return; 1212 } 1213 if (nc->info->type == NET_CLIENT_DRIVER_NIC) { 1214 error_report("invalid host network device '%s'", device); 1215 return; 1216 } 1217 1218 qemu_del_net_client(nc->peer); 1219 qemu_del_net_client(nc); 1220 qemu_opts_del(qemu_opts_find(qemu_find_opts("net"), device)); 1221 } 1222 1223 void netdev_add(QemuOpts *opts, Error **errp) 1224 { 1225 net_client_init(opts, true, errp); 1226 } 1227 1228 void qmp_netdev_add(QDict *qdict, QObject **ret, Error **errp) 1229 { 1230 Error *local_err = NULL; 1231 QemuOptsList *opts_list; 1232 QemuOpts *opts; 1233 1234 opts_list = qemu_find_opts_err("netdev", &local_err); 1235 if (local_err) { 1236 goto out; 1237 } 1238 1239 opts = qemu_opts_from_qdict(opts_list, qdict, &local_err); 1240 if (local_err) { 1241 goto out; 1242 } 1243 1244 netdev_add(opts, &local_err); 1245 if (local_err) { 1246 qemu_opts_del(opts); 1247 goto out; 1248 } 1249 1250 out: 1251 error_propagate(errp, local_err); 1252 } 1253 1254 void qmp_netdev_del(const char *id, Error **errp) 1255 { 1256 NetClientState *nc; 1257 QemuOpts *opts; 1258 1259 nc = qemu_find_netdev(id); 1260 if (!nc) { 1261 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1262 "Device '%s' not found", id); 1263 return; 1264 } 1265 1266 opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id); 1267 if (!opts) { 1268 error_setg(errp, "Device '%s' is not a netdev", id); 1269 return; 1270 } 1271 1272 qemu_del_net_client(nc); 1273 qemu_opts_del(opts); 1274 } 1275 1276 static void netfilter_print_info(Monitor *mon, NetFilterState *nf) 1277 { 1278 char *str; 1279 ObjectProperty *prop; 1280 ObjectPropertyIterator iter; 1281 Visitor *v; 1282 1283 /* generate info str */ 1284 object_property_iter_init(&iter, OBJECT(nf)); 1285 while ((prop = object_property_iter_next(&iter))) { 1286 if (!strcmp(prop->name, "type")) { 1287 continue; 1288 } 1289 v = string_output_visitor_new(false, &str); 1290 object_property_get(OBJECT(nf), v, prop->name, NULL); 1291 visit_complete(v, &str); 1292 visit_free(v); 1293 monitor_printf(mon, ",%s=%s", prop->name, str); 1294 g_free(str); 1295 } 1296 monitor_printf(mon, "\n"); 1297 } 1298 1299 void print_net_client(Monitor *mon, NetClientState *nc) 1300 { 1301 NetFilterState *nf; 1302 1303 monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name, 1304 nc->queue_index, 1305 NetClientDriver_str(nc->info->type), 1306 nc->info_str); 1307 if (!QTAILQ_EMPTY(&nc->filters)) { 1308 monitor_printf(mon, "filters:\n"); 1309 } 1310 QTAILQ_FOREACH(nf, &nc->filters, next) { 1311 char *path = object_get_canonical_path_component(OBJECT(nf)); 1312 1313 monitor_printf(mon, " - %s: type=%s", path, 1314 object_get_typename(OBJECT(nf))); 1315 netfilter_print_info(mon, nf); 1316 g_free(path); 1317 } 1318 } 1319 1320 RxFilterInfoList *qmp_query_rx_filter(bool has_name, const char *name, 1321 Error **errp) 1322 { 1323 NetClientState *nc; 1324 RxFilterInfoList *filter_list = NULL, *last_entry = NULL; 1325 1326 QTAILQ_FOREACH(nc, &net_clients, next) { 1327 RxFilterInfoList *entry; 1328 RxFilterInfo *info; 1329 1330 if (has_name && strcmp(nc->name, name) != 0) { 1331 continue; 1332 } 1333 1334 /* only query rx-filter information of NIC */ 1335 if (nc->info->type != NET_CLIENT_DRIVER_NIC) { 1336 if (has_name) { 1337 error_setg(errp, "net client(%s) isn't a NIC", name); 1338 return NULL; 1339 } 1340 continue; 1341 } 1342 1343 /* only query information on queue 0 since the info is per nic, 1344 * not per queue 1345 */ 1346 if (nc->queue_index != 0) 1347 continue; 1348 1349 if (nc->info->query_rx_filter) { 1350 info = nc->info->query_rx_filter(nc); 1351 entry = g_malloc0(sizeof(*entry)); 1352 entry->value = info; 1353 1354 if (!filter_list) { 1355 filter_list = entry; 1356 } else { 1357 last_entry->next = entry; 1358 } 1359 last_entry = entry; 1360 } else if (has_name) { 1361 error_setg(errp, "net client(%s) doesn't support" 1362 " rx-filter querying", name); 1363 return NULL; 1364 } 1365 1366 if (has_name) { 1367 break; 1368 } 1369 } 1370 1371 if (filter_list == NULL && has_name) { 1372 error_setg(errp, "invalid net client name: %s", name); 1373 } 1374 1375 return filter_list; 1376 } 1377 1378 void hmp_info_network(Monitor *mon, const QDict *qdict) 1379 { 1380 NetClientState *nc, *peer; 1381 NetClientDriver type; 1382 1383 net_hub_info(mon); 1384 1385 QTAILQ_FOREACH(nc, &net_clients, next) { 1386 peer = nc->peer; 1387 type = nc->info->type; 1388 1389 /* Skip if already printed in hub info */ 1390 if (net_hub_id_for_client(nc, NULL) == 0) { 1391 continue; 1392 } 1393 1394 if (!peer || type == NET_CLIENT_DRIVER_NIC) { 1395 print_net_client(mon, nc); 1396 } /* else it's a netdev connected to a NIC, printed with the NIC */ 1397 if (peer && type == NET_CLIENT_DRIVER_NIC) { 1398 monitor_printf(mon, " \\ "); 1399 print_net_client(mon, peer); 1400 } 1401 } 1402 } 1403 1404 void qmp_set_link(const char *name, bool up, Error **errp) 1405 { 1406 NetClientState *ncs[MAX_QUEUE_NUM]; 1407 NetClientState *nc; 1408 int queues, i; 1409 1410 queues = qemu_find_net_clients_except(name, ncs, 1411 NET_CLIENT_DRIVER__MAX, 1412 MAX_QUEUE_NUM); 1413 1414 if (queues == 0) { 1415 error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND, 1416 "Device '%s' not found", name); 1417 return; 1418 } 1419 nc = ncs[0]; 1420 1421 for (i = 0; i < queues; i++) { 1422 ncs[i]->link_down = !up; 1423 } 1424 1425 if (nc->info->link_status_changed) { 1426 nc->info->link_status_changed(nc); 1427 } 1428 1429 if (nc->peer) { 1430 /* Change peer link only if the peer is NIC and then notify peer. 1431 * If the peer is a HUBPORT or a backend, we do not change the 1432 * link status. 1433 * 1434 * This behavior is compatible with qemu vlans where there could be 1435 * multiple clients that can still communicate with each other in 1436 * disconnected mode. For now maintain this compatibility. 1437 */ 1438 if (nc->peer->info->type == NET_CLIENT_DRIVER_NIC) { 1439 for (i = 0; i < queues; i++) { 1440 ncs[i]->peer->link_down = !up; 1441 } 1442 } 1443 if (nc->peer->info->link_status_changed) { 1444 nc->peer->info->link_status_changed(nc->peer); 1445 } 1446 } 1447 } 1448 1449 static void net_vm_change_state_handler(void *opaque, int running, 1450 RunState state) 1451 { 1452 NetClientState *nc; 1453 NetClientState *tmp; 1454 1455 QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) { 1456 if (running) { 1457 /* Flush queued packets and wake up backends. */ 1458 if (nc->peer && qemu_can_send_packet(nc)) { 1459 qemu_flush_queued_packets(nc->peer); 1460 } 1461 } else { 1462 /* Complete all queued packets, to guarantee we don't modify 1463 * state later when VM is not running. 1464 */ 1465 qemu_flush_or_purge_queued_packets(nc, true); 1466 } 1467 } 1468 } 1469 1470 void net_cleanup(void) 1471 { 1472 NetClientState *nc; 1473 1474 /* We may del multiple entries during qemu_del_net_client(), 1475 * so QTAILQ_FOREACH_SAFE() is also not safe here. 1476 */ 1477 while (!QTAILQ_EMPTY(&net_clients)) { 1478 nc = QTAILQ_FIRST(&net_clients); 1479 if (nc->info->type == NET_CLIENT_DRIVER_NIC) { 1480 qemu_del_nic(qemu_get_nic(nc)); 1481 } else { 1482 qemu_del_net_client(nc); 1483 } 1484 } 1485 1486 qemu_del_vm_change_state_handler(net_change_state_entry); 1487 } 1488 1489 void net_check_clients(void) 1490 { 1491 NetClientState *nc; 1492 int i; 1493 1494 net_hub_check_clients(); 1495 1496 QTAILQ_FOREACH(nc, &net_clients, next) { 1497 if (!nc->peer) { 1498 warn_report("%s %s has no peer", 1499 nc->info->type == NET_CLIENT_DRIVER_NIC 1500 ? "nic" : "netdev", 1501 nc->name); 1502 } 1503 } 1504 1505 /* Check that all NICs requested via -net nic actually got created. 1506 * NICs created via -device don't need to be checked here because 1507 * they are always instantiated. 1508 */ 1509 for (i = 0; i < MAX_NICS; i++) { 1510 NICInfo *nd = &nd_table[i]; 1511 if (nd->used && !nd->instantiated) { 1512 warn_report("requested NIC (%s, model %s) " 1513 "was not created (not supported by this machine?)", 1514 nd->name ? nd->name : "anonymous", 1515 nd->model ? nd->model : "unspecified"); 1516 } 1517 } 1518 } 1519 1520 static int net_init_client(void *dummy, QemuOpts *opts, Error **errp) 1521 { 1522 Error *local_err = NULL; 1523 1524 net_client_init(opts, false, &local_err); 1525 if (local_err) { 1526 error_report_err(local_err); 1527 return -1; 1528 } 1529 1530 return 0; 1531 } 1532 1533 static int net_init_netdev(void *dummy, QemuOpts *opts, Error **errp) 1534 { 1535 Error *local_err = NULL; 1536 int ret; 1537 1538 ret = net_client_init(opts, true, &local_err); 1539 if (local_err) { 1540 error_report_err(local_err); 1541 return -1; 1542 } 1543 1544 return ret; 1545 } 1546 1547 int net_init_clients(void) 1548 { 1549 QemuOptsList *net = qemu_find_opts("net"); 1550 1551 net_change_state_entry = 1552 qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL); 1553 1554 QTAILQ_INIT(&net_clients); 1555 1556 if (qemu_opts_foreach(qemu_find_opts("netdev"), 1557 net_init_netdev, NULL, NULL)) { 1558 return -1; 1559 } 1560 1561 if (qemu_opts_foreach(net, net_init_client, NULL, NULL)) { 1562 return -1; 1563 } 1564 1565 return 0; 1566 } 1567 1568 int net_client_parse(QemuOptsList *opts_list, const char *optarg) 1569 { 1570 if (!qemu_opts_parse_noisily(opts_list, optarg, true)) { 1571 return -1; 1572 } 1573 1574 return 0; 1575 } 1576 1577 /* From FreeBSD */ 1578 /* XXX: optimize */ 1579 uint32_t net_crc32(const uint8_t *p, int len) 1580 { 1581 uint32_t crc; 1582 int carry, i, j; 1583 uint8_t b; 1584 1585 crc = 0xffffffff; 1586 for (i = 0; i < len; i++) { 1587 b = *p++; 1588 for (j = 0; j < 8; j++) { 1589 carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01); 1590 crc <<= 1; 1591 b >>= 1; 1592 if (carry) { 1593 crc = ((crc ^ POLYNOMIAL_BE) | carry); 1594 } 1595 } 1596 } 1597 1598 return crc; 1599 } 1600 1601 uint32_t net_crc32_le(const uint8_t *p, int len) 1602 { 1603 uint32_t crc; 1604 int carry, i, j; 1605 uint8_t b; 1606 1607 crc = 0xffffffff; 1608 for (i = 0; i < len; i++) { 1609 b = *p++; 1610 for (j = 0; j < 8; j++) { 1611 carry = (crc & 0x1) ^ (b & 0x01); 1612 crc >>= 1; 1613 b >>= 1; 1614 if (carry) { 1615 crc ^= POLYNOMIAL_LE; 1616 } 1617 } 1618 } 1619 1620 return crc; 1621 } 1622 1623 QemuOptsList qemu_netdev_opts = { 1624 .name = "netdev", 1625 .implied_opt_name = "type", 1626 .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head), 1627 .desc = { 1628 /* 1629 * no elements => accept any params 1630 * validation will happen later 1631 */ 1632 { /* end of list */ } 1633 }, 1634 }; 1635 1636 QemuOptsList qemu_net_opts = { 1637 .name = "net", 1638 .implied_opt_name = "type", 1639 .head = QTAILQ_HEAD_INITIALIZER(qemu_net_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 void net_socket_rs_init(SocketReadState *rs, 1650 SocketReadStateFinalize *finalize, 1651 bool vnet_hdr) 1652 { 1653 rs->state = 0; 1654 rs->vnet_hdr = vnet_hdr; 1655 rs->index = 0; 1656 rs->packet_len = 0; 1657 rs->vnet_hdr_len = 0; 1658 memset(rs->buf, 0, sizeof(rs->buf)); 1659 rs->finalize = finalize; 1660 } 1661 1662 /* 1663 * Returns 1664 * 0: success 1665 * -1: error occurs 1666 */ 1667 int net_fill_rstate(SocketReadState *rs, const uint8_t *buf, int size) 1668 { 1669 unsigned int l; 1670 1671 while (size > 0) { 1672 /* Reassemble a packet from the network. 1673 * 0 = getting length. 1674 * 1 = getting vnet header length. 1675 * 2 = getting data. 1676 */ 1677 switch (rs->state) { 1678 case 0: 1679 l = 4 - rs->index; 1680 if (l > size) { 1681 l = size; 1682 } 1683 memcpy(rs->buf + rs->index, buf, l); 1684 buf += l; 1685 size -= l; 1686 rs->index += l; 1687 if (rs->index == 4) { 1688 /* got length */ 1689 rs->packet_len = ntohl(*(uint32_t *)rs->buf); 1690 rs->index = 0; 1691 if (rs->vnet_hdr) { 1692 rs->state = 1; 1693 } else { 1694 rs->state = 2; 1695 rs->vnet_hdr_len = 0; 1696 } 1697 } 1698 break; 1699 case 1: 1700 l = 4 - rs->index; 1701 if (l > size) { 1702 l = size; 1703 } 1704 memcpy(rs->buf + rs->index, buf, l); 1705 buf += l; 1706 size -= l; 1707 rs->index += l; 1708 if (rs->index == 4) { 1709 /* got vnet header length */ 1710 rs->vnet_hdr_len = ntohl(*(uint32_t *)rs->buf); 1711 rs->index = 0; 1712 rs->state = 2; 1713 } 1714 break; 1715 case 2: 1716 l = rs->packet_len - rs->index; 1717 if (l > size) { 1718 l = size; 1719 } 1720 if (rs->index + l <= sizeof(rs->buf)) { 1721 memcpy(rs->buf + rs->index, buf, l); 1722 } else { 1723 fprintf(stderr, "serious error: oversized packet received," 1724 "connection terminated.\n"); 1725 rs->index = rs->state = 0; 1726 return -1; 1727 } 1728 1729 rs->index += l; 1730 buf += l; 1731 size -= l; 1732 if (rs->index >= rs->packet_len) { 1733 rs->index = 0; 1734 rs->state = 0; 1735 assert(rs->finalize); 1736 rs->finalize(rs); 1737 } 1738 break; 1739 } 1740 } 1741 1742 assert(size == 0); 1743 return 0; 1744 } 1745