1 /* 2 * QEMU System Emulator 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 #include "qemu/osdep.h" 25 26 #include "net/net.h" 27 #include "clients.h" 28 #include "monitor/monitor.h" 29 #include "qapi/error.h" 30 #include "qemu/error-report.h" 31 #include "qemu/option.h" 32 #include "qemu/sockets.h" 33 #include "qemu/iov.h" 34 #include "qemu/main-loop.h" 35 36 typedef struct NetSocketState { 37 NetClientState nc; 38 int listen_fd; 39 int fd; 40 SocketReadState rs; 41 unsigned int send_index; /* number of bytes sent (only SOCK_STREAM) */ 42 struct sockaddr_in dgram_dst; /* contains inet host and port destination iff connectionless (SOCK_DGRAM) */ 43 IOHandler *send_fn; /* differs between SOCK_STREAM/SOCK_DGRAM */ 44 bool read_poll; /* waiting to receive data? */ 45 bool write_poll; /* waiting to transmit data? */ 46 } NetSocketState; 47 48 static void net_socket_accept(void *opaque); 49 static void net_socket_writable(void *opaque); 50 51 static void net_socket_update_fd_handler(NetSocketState *s) 52 { 53 qemu_set_fd_handler(s->fd, 54 s->read_poll ? s->send_fn : NULL, 55 s->write_poll ? net_socket_writable : NULL, 56 s); 57 } 58 59 static void net_socket_read_poll(NetSocketState *s, bool enable) 60 { 61 s->read_poll = enable; 62 net_socket_update_fd_handler(s); 63 } 64 65 static void net_socket_write_poll(NetSocketState *s, bool enable) 66 { 67 s->write_poll = enable; 68 net_socket_update_fd_handler(s); 69 } 70 71 static void net_socket_writable(void *opaque) 72 { 73 NetSocketState *s = opaque; 74 75 net_socket_write_poll(s, false); 76 77 qemu_flush_queued_packets(&s->nc); 78 } 79 80 static ssize_t net_socket_receive(NetClientState *nc, const uint8_t *buf, size_t size) 81 { 82 NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc); 83 uint32_t len = htonl(size); 84 struct iovec iov[] = { 85 { 86 .iov_base = &len, 87 .iov_len = sizeof(len), 88 }, { 89 .iov_base = (void *)buf, 90 .iov_len = size, 91 }, 92 }; 93 size_t remaining; 94 ssize_t ret; 95 96 remaining = iov_size(iov, 2) - s->send_index; 97 ret = iov_send(s->fd, iov, 2, s->send_index, remaining); 98 99 if (ret == -1 && errno == EAGAIN) { 100 ret = 0; /* handled further down */ 101 } 102 if (ret == -1) { 103 s->send_index = 0; 104 return -errno; 105 } 106 if (ret < (ssize_t)remaining) { 107 s->send_index += ret; 108 net_socket_write_poll(s, true); 109 return 0; 110 } 111 s->send_index = 0; 112 return size; 113 } 114 115 static ssize_t net_socket_receive_dgram(NetClientState *nc, const uint8_t *buf, size_t size) 116 { 117 NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc); 118 ssize_t ret; 119 120 ret = RETRY_ON_EINTR( 121 s->dgram_dst.sin_family != AF_UNIX ? 122 sendto(s->fd, buf, size, 0, 123 (struct sockaddr *)&s->dgram_dst, 124 sizeof(s->dgram_dst)) : 125 send(s->fd, buf, size, 0) 126 ); 127 128 if (ret == -1 && errno == EAGAIN) { 129 net_socket_write_poll(s, true); 130 return 0; 131 } 132 return ret; 133 } 134 135 static void net_socket_send_completed(NetClientState *nc, ssize_t len) 136 { 137 NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc); 138 139 if (!s->read_poll) { 140 net_socket_read_poll(s, true); 141 } 142 } 143 144 static void net_socket_rs_finalize(SocketReadState *rs) 145 { 146 NetSocketState *s = container_of(rs, NetSocketState, rs); 147 148 if (qemu_send_packet_async(&s->nc, rs->buf, 149 rs->packet_len, 150 net_socket_send_completed) == 0) { 151 net_socket_read_poll(s, false); 152 } 153 } 154 155 static void net_socket_send(void *opaque) 156 { 157 NetSocketState *s = opaque; 158 int size; 159 int ret; 160 uint8_t buf1[NET_BUFSIZE]; 161 const uint8_t *buf; 162 163 size = recv(s->fd, buf1, sizeof(buf1), 0); 164 if (size < 0) { 165 if (errno != EWOULDBLOCK) 166 goto eoc; 167 } else if (size == 0) { 168 /* end of connection */ 169 eoc: 170 net_socket_read_poll(s, false); 171 net_socket_write_poll(s, false); 172 if (s->listen_fd != -1) { 173 qemu_set_fd_handler(s->listen_fd, net_socket_accept, NULL, s); 174 } 175 close(s->fd); 176 177 s->fd = -1; 178 net_socket_rs_init(&s->rs, net_socket_rs_finalize, false); 179 s->nc.link_down = true; 180 qemu_set_info_str(&s->nc, "%s", ""); 181 182 return; 183 } 184 buf = buf1; 185 186 ret = net_fill_rstate(&s->rs, buf, size); 187 188 if (ret == -1) { 189 goto eoc; 190 } 191 } 192 193 static void net_socket_send_dgram(void *opaque) 194 { 195 NetSocketState *s = opaque; 196 int size; 197 198 size = recv(s->fd, s->rs.buf, sizeof(s->rs.buf), 0); 199 if (size < 0) 200 return; 201 if (size == 0) { 202 /* end of connection */ 203 net_socket_read_poll(s, false); 204 net_socket_write_poll(s, false); 205 return; 206 } 207 if (qemu_send_packet_async(&s->nc, s->rs.buf, size, 208 net_socket_send_completed) == 0) { 209 net_socket_read_poll(s, false); 210 } 211 } 212 213 static int net_socket_mcast_create(struct sockaddr_in *mcastaddr, 214 struct in_addr *localaddr, 215 Error **errp) 216 { 217 struct ip_mreq imr; 218 int fd; 219 int val, ret; 220 #ifdef __OpenBSD__ 221 unsigned char loop; 222 #else 223 int loop; 224 #endif 225 226 if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) { 227 error_setg(errp, "specified mcastaddr %s (0x%08x) " 228 "does not contain a multicast address", 229 inet_ntoa(mcastaddr->sin_addr), 230 (int)ntohl(mcastaddr->sin_addr.s_addr)); 231 return -1; 232 } 233 234 fd = qemu_socket(PF_INET, SOCK_DGRAM, 0); 235 if (fd < 0) { 236 error_setg_errno(errp, errno, "can't create datagram socket"); 237 return -1; 238 } 239 240 /* Allow multiple sockets to bind the same multicast ip and port by setting 241 * SO_REUSEADDR. This is the only situation where SO_REUSEADDR should be set 242 * on windows. Use socket_set_fast_reuse otherwise as it sets SO_REUSEADDR 243 * only on posix systems. 244 */ 245 val = 1; 246 ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)); 247 if (ret < 0) { 248 error_setg_errno(errp, errno, 249 "can't set socket option SO_REUSEADDR"); 250 goto fail; 251 } 252 253 ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr)); 254 if (ret < 0) { 255 error_setg_errno(errp, errno, "can't bind ip=%s to socket", 256 inet_ntoa(mcastaddr->sin_addr)); 257 goto fail; 258 } 259 260 /* Add host to multicast group */ 261 imr.imr_multiaddr = mcastaddr->sin_addr; 262 if (localaddr) { 263 imr.imr_interface = *localaddr; 264 } else { 265 imr.imr_interface.s_addr = htonl(INADDR_ANY); 266 } 267 268 ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, 269 &imr, sizeof(struct ip_mreq)); 270 if (ret < 0) { 271 error_setg_errno(errp, errno, 272 "can't add socket to multicast group %s", 273 inet_ntoa(imr.imr_multiaddr)); 274 goto fail; 275 } 276 277 /* Force mcast msgs to loopback (eg. several QEMUs in same host */ 278 loop = 1; 279 ret = setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, 280 &loop, sizeof(loop)); 281 if (ret < 0) { 282 error_setg_errno(errp, errno, 283 "can't force multicast message to loopback"); 284 goto fail; 285 } 286 287 /* If a bind address is given, only send packets from that address */ 288 if (localaddr != NULL) { 289 ret = setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF, 290 localaddr, sizeof(*localaddr)); 291 if (ret < 0) { 292 error_setg_errno(errp, errno, 293 "can't set the default network send interface"); 294 goto fail; 295 } 296 } 297 298 qemu_socket_set_nonblock(fd); 299 return fd; 300 fail: 301 if (fd >= 0) 302 close(fd); 303 return -1; 304 } 305 306 static void net_socket_cleanup(NetClientState *nc) 307 { 308 NetSocketState *s = DO_UPCAST(NetSocketState, nc, nc); 309 if (s->fd != -1) { 310 net_socket_read_poll(s, false); 311 net_socket_write_poll(s, false); 312 close(s->fd); 313 s->fd = -1; 314 } 315 if (s->listen_fd != -1) { 316 qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL); 317 close(s->listen_fd); 318 s->listen_fd = -1; 319 } 320 } 321 322 static NetClientInfo net_dgram_socket_info = { 323 .type = NET_CLIENT_DRIVER_SOCKET, 324 .size = sizeof(NetSocketState), 325 .receive = net_socket_receive_dgram, 326 .cleanup = net_socket_cleanup, 327 }; 328 329 static NetSocketState *net_socket_fd_init_dgram(NetClientState *peer, 330 const char *model, 331 const char *name, 332 int fd, int is_connected, 333 const char *mcast, 334 Error **errp) 335 { 336 struct sockaddr_in saddr; 337 int newfd; 338 NetClientState *nc; 339 NetSocketState *s; 340 SocketAddress *sa; 341 SocketAddressType sa_type; 342 343 sa = socket_local_address(fd, errp); 344 if (!sa) { 345 return NULL; 346 } 347 sa_type = sa->type; 348 qapi_free_SocketAddress(sa); 349 350 /* fd passed: multicast: "learn" dgram_dst address from bound address and save it 351 * Because this may be "shared" socket from a "master" process, datagrams would be recv() 352 * by ONLY ONE process: we must "clone" this dgram socket --jjo 353 */ 354 355 if (is_connected && mcast != NULL) { 356 if (parse_host_port(&saddr, mcast, errp) < 0) { 357 goto err; 358 } 359 /* must be bound */ 360 if (saddr.sin_addr.s_addr == 0) { 361 error_setg(errp, "can't setup multicast destination address"); 362 goto err; 363 } 364 /* clone dgram socket */ 365 newfd = net_socket_mcast_create(&saddr, NULL, errp); 366 if (newfd < 0) { 367 goto err; 368 } 369 /* clone newfd to fd, close newfd */ 370 dup2(newfd, fd); 371 close(newfd); 372 373 } 374 375 nc = qemu_new_net_client(&net_dgram_socket_info, peer, model, name); 376 377 s = DO_UPCAST(NetSocketState, nc, nc); 378 379 s->fd = fd; 380 s->listen_fd = -1; 381 s->send_fn = net_socket_send_dgram; 382 net_socket_rs_init(&s->rs, net_socket_rs_finalize, false); 383 net_socket_read_poll(s, true); 384 385 /* mcast: save bound address as dst */ 386 if (is_connected && mcast != NULL) { 387 s->dgram_dst = saddr; 388 qemu_set_info_str(nc, "socket: fd=%d (cloned mcast=%s:%d)", fd, 389 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port)); 390 } else { 391 if (sa_type == SOCKET_ADDRESS_TYPE_UNIX) { 392 s->dgram_dst.sin_family = AF_UNIX; 393 } 394 395 qemu_set_info_str(nc, "socket: fd=%d %s", fd, 396 SocketAddressType_str(sa_type)); 397 } 398 399 return s; 400 401 err: 402 close(fd); 403 return NULL; 404 } 405 406 static void net_socket_connect(void *opaque) 407 { 408 NetSocketState *s = opaque; 409 s->send_fn = net_socket_send; 410 net_socket_read_poll(s, true); 411 } 412 413 static NetClientInfo net_socket_info = { 414 .type = NET_CLIENT_DRIVER_SOCKET, 415 .size = sizeof(NetSocketState), 416 .receive = net_socket_receive, 417 .cleanup = net_socket_cleanup, 418 }; 419 420 static NetSocketState *net_socket_fd_init_stream(NetClientState *peer, 421 const char *model, 422 const char *name, 423 int fd, int is_connected) 424 { 425 NetClientState *nc; 426 NetSocketState *s; 427 428 nc = qemu_new_net_client(&net_socket_info, peer, model, name); 429 430 qemu_set_info_str(nc, "socket: fd=%d", fd); 431 432 s = DO_UPCAST(NetSocketState, nc, nc); 433 434 s->fd = fd; 435 s->listen_fd = -1; 436 net_socket_rs_init(&s->rs, net_socket_rs_finalize, false); 437 438 /* Disable Nagle algorithm on TCP sockets to reduce latency */ 439 socket_set_nodelay(fd); 440 441 if (is_connected) { 442 net_socket_connect(s); 443 } else { 444 qemu_set_fd_handler(s->fd, NULL, net_socket_connect, s); 445 } 446 return s; 447 } 448 449 static int net_socket_fd_check(int fd, Error **errp) 450 { 451 int so_type, optlen = sizeof(so_type); 452 453 if (getsockopt(fd, SOL_SOCKET, SO_TYPE, (char *)&so_type, 454 (socklen_t *)&optlen) < 0) { 455 error_setg(errp, "can't get socket option SO_TYPE"); 456 return -1; 457 } 458 if (so_type != SOCK_DGRAM && so_type != SOCK_STREAM) { 459 error_setg(errp, "socket type=%d for fd=%d must be either" 460 " SOCK_DGRAM or SOCK_STREAM", so_type, fd); 461 return -1; 462 } 463 return so_type; 464 } 465 466 static NetSocketState *net_socket_fd_init(NetClientState *peer, 467 const char *model, const char *name, 468 int fd, int is_connected, 469 const char *mc, Error **errp) 470 { 471 int so_type; 472 473 so_type = net_socket_fd_check(fd, errp); 474 if (so_type < 0) { 475 close(fd); 476 return NULL; 477 } 478 switch(so_type) { 479 case SOCK_DGRAM: 480 return net_socket_fd_init_dgram(peer, model, name, fd, is_connected, 481 mc, errp); 482 case SOCK_STREAM: 483 return net_socket_fd_init_stream(peer, model, name, fd, is_connected); 484 } 485 return NULL; 486 } 487 488 static void net_socket_accept(void *opaque) 489 { 490 NetSocketState *s = opaque; 491 struct sockaddr_in saddr; 492 socklen_t len; 493 int fd; 494 495 for(;;) { 496 len = sizeof(saddr); 497 fd = qemu_accept(s->listen_fd, (struct sockaddr *)&saddr, &len); 498 if (fd < 0 && errno != EINTR) { 499 return; 500 } else if (fd >= 0) { 501 qemu_set_fd_handler(s->listen_fd, NULL, NULL, NULL); 502 break; 503 } 504 } 505 506 s->fd = fd; 507 s->nc.link_down = false; 508 net_socket_connect(s); 509 qemu_set_info_str(&s->nc, "socket: connection from %s:%d", 510 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port)); 511 } 512 513 static int net_socket_listen_init(NetClientState *peer, 514 const char *model, 515 const char *name, 516 const char *host_str, 517 Error **errp) 518 { 519 NetClientState *nc; 520 NetSocketState *s; 521 struct sockaddr_in saddr; 522 int fd, ret; 523 524 if (parse_host_port(&saddr, host_str, errp) < 0) { 525 return -1; 526 } 527 528 fd = qemu_socket(PF_INET, SOCK_STREAM, 0); 529 if (fd < 0) { 530 error_setg_errno(errp, errno, "can't create stream socket"); 531 return -1; 532 } 533 qemu_socket_set_nonblock(fd); 534 535 socket_set_fast_reuse(fd); 536 537 ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr)); 538 if (ret < 0) { 539 error_setg_errno(errp, errno, "can't bind ip=%s to socket", 540 inet_ntoa(saddr.sin_addr)); 541 close(fd); 542 return -1; 543 } 544 ret = listen(fd, 0); 545 if (ret < 0) { 546 error_setg_errno(errp, errno, "can't listen on socket"); 547 close(fd); 548 return -1; 549 } 550 551 nc = qemu_new_net_client(&net_socket_info, peer, model, name); 552 s = DO_UPCAST(NetSocketState, nc, nc); 553 s->fd = -1; 554 s->listen_fd = fd; 555 s->nc.link_down = true; 556 net_socket_rs_init(&s->rs, net_socket_rs_finalize, false); 557 558 qemu_set_fd_handler(s->listen_fd, net_socket_accept, NULL, s); 559 return 0; 560 } 561 562 static int net_socket_connect_init(NetClientState *peer, 563 const char *model, 564 const char *name, 565 const char *host_str, 566 Error **errp) 567 { 568 NetSocketState *s; 569 int fd, connected, ret; 570 struct sockaddr_in saddr; 571 572 if (parse_host_port(&saddr, host_str, errp) < 0) { 573 return -1; 574 } 575 576 fd = qemu_socket(PF_INET, SOCK_STREAM, 0); 577 if (fd < 0) { 578 error_setg_errno(errp, errno, "can't create stream socket"); 579 return -1; 580 } 581 qemu_socket_set_nonblock(fd); 582 583 connected = 0; 584 for(;;) { 585 ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr)); 586 if (ret < 0) { 587 if (errno == EINTR || errno == EWOULDBLOCK) { 588 /* continue */ 589 } else if (errno == EINPROGRESS || 590 errno == EALREADY) { 591 break; 592 } else { 593 error_setg_errno(errp, errno, "can't connect socket"); 594 close(fd); 595 return -1; 596 } 597 } else { 598 connected = 1; 599 break; 600 } 601 } 602 s = net_socket_fd_init_stream(peer, model, name, fd, connected); 603 if (!s) { 604 return -1; 605 } 606 607 qemu_set_info_str(&s->nc, "socket: connect to %s:%d", 608 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port)); 609 return 0; 610 } 611 612 static int net_socket_mcast_init(NetClientState *peer, 613 const char *model, 614 const char *name, 615 const char *host_str, 616 const char *localaddr_str, 617 Error **errp) 618 { 619 NetSocketState *s; 620 int fd; 621 struct sockaddr_in saddr; 622 struct in_addr localaddr, *param_localaddr; 623 624 if (parse_host_port(&saddr, host_str, errp) < 0) { 625 return -1; 626 } 627 628 if (localaddr_str != NULL) { 629 if (inet_aton(localaddr_str, &localaddr) == 0) { 630 error_setg(errp, "localaddr '%s' is not a valid IPv4 address", 631 localaddr_str); 632 return -1; 633 } 634 param_localaddr = &localaddr; 635 } else { 636 param_localaddr = NULL; 637 } 638 639 fd = net_socket_mcast_create(&saddr, param_localaddr, errp); 640 if (fd < 0) { 641 return -1; 642 } 643 644 s = net_socket_fd_init_dgram(peer, model, name, fd, 0, NULL, errp); 645 if (!s) { 646 return -1; 647 } 648 649 s->dgram_dst = saddr; 650 651 qemu_set_info_str(&s->nc, "socket: mcast=%s:%d", 652 inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port)); 653 return 0; 654 655 } 656 657 static int net_socket_udp_init(NetClientState *peer, 658 const char *model, 659 const char *name, 660 const char *rhost, 661 const char *lhost, 662 Error **errp) 663 { 664 NetSocketState *s; 665 int fd, ret; 666 struct sockaddr_in laddr, raddr; 667 668 if (parse_host_port(&laddr, lhost, errp) < 0) { 669 return -1; 670 } 671 672 if (parse_host_port(&raddr, rhost, errp) < 0) { 673 return -1; 674 } 675 676 fd = qemu_socket(PF_INET, SOCK_DGRAM, 0); 677 if (fd < 0) { 678 error_setg_errno(errp, errno, "can't create datagram socket"); 679 return -1; 680 } 681 682 ret = socket_set_fast_reuse(fd); 683 if (ret < 0) { 684 error_setg_errno(errp, errno, 685 "can't set socket option SO_REUSEADDR"); 686 close(fd); 687 return -1; 688 } 689 ret = bind(fd, (struct sockaddr *)&laddr, sizeof(laddr)); 690 if (ret < 0) { 691 error_setg_errno(errp, errno, "can't bind ip=%s to socket", 692 inet_ntoa(laddr.sin_addr)); 693 close(fd); 694 return -1; 695 } 696 qemu_socket_set_nonblock(fd); 697 698 s = net_socket_fd_init_dgram(peer, model, name, fd, 0, NULL, errp); 699 if (!s) { 700 return -1; 701 } 702 703 s->dgram_dst = raddr; 704 705 qemu_set_info_str(&s->nc, "socket: udp=%s:%d", inet_ntoa(raddr.sin_addr), 706 ntohs(raddr.sin_port)); 707 return 0; 708 } 709 710 int net_init_socket(const Netdev *netdev, const char *name, 711 NetClientState *peer, Error **errp) 712 { 713 const NetdevSocketOptions *sock; 714 715 assert(netdev->type == NET_CLIENT_DRIVER_SOCKET); 716 sock = &netdev->u.socket; 717 718 if (!!sock->fd + !!sock->listen + !!sock->connect + !!sock->mcast + 719 !!sock->udp != 1) { 720 error_setg(errp, "exactly one of listen=, connect=, mcast= or udp=" 721 " is required"); 722 return -1; 723 } 724 725 if (sock->localaddr && !sock->mcast && !sock->udp) { 726 error_setg(errp, "localaddr= is only valid with mcast= or udp="); 727 return -1; 728 } 729 730 if (sock->fd) { 731 int fd, ret; 732 733 fd = monitor_fd_param(monitor_cur(), sock->fd, errp); 734 if (fd == -1) { 735 return -1; 736 } 737 ret = qemu_socket_try_set_nonblock(fd); 738 if (ret < 0) { 739 error_setg_errno(errp, -ret, "%s: Can't use file descriptor %d", 740 name, fd); 741 return -1; 742 } 743 if (!net_socket_fd_init(peer, "socket", name, fd, 1, sock->mcast, 744 errp)) { 745 return -1; 746 } 747 return 0; 748 } 749 750 if (sock->listen) { 751 if (net_socket_listen_init(peer, "socket", name, sock->listen, errp) 752 < 0) { 753 return -1; 754 } 755 return 0; 756 } 757 758 if (sock->connect) { 759 if (net_socket_connect_init(peer, "socket", name, sock->connect, errp) 760 < 0) { 761 return -1; 762 } 763 return 0; 764 } 765 766 if (sock->mcast) { 767 /* if sock->localaddr is missing, it has been initialized to "all bits 768 * zero" */ 769 if (net_socket_mcast_init(peer, "socket", name, sock->mcast, 770 sock->localaddr, errp) < 0) { 771 return -1; 772 } 773 return 0; 774 } 775 776 assert(sock->udp); 777 if (!sock->localaddr) { 778 error_setg(errp, "localaddr= is mandatory with udp="); 779 return -1; 780 } 781 if (net_socket_udp_init(peer, "socket", name, sock->udp, sock->localaddr, 782 errp) < 0) { 783 return -1; 784 } 785 return 0; 786 } 787