| 1 | /* |
| 2 | * QEMU System Emulator |
| 3 | * |
| 4 | * Copyright (c) 2003-2008 Fabrice Bellard |
| 5 | * Copyright (c) 2022 Red Hat, Inc. |
| 6 | * |
| 7 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 8 | * of this software and associated documentation files (the "Software"), to deal |
| 9 | * in the Software without restriction, including without limitation the rights |
| 10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 11 | * copies of the Software, and to permit persons to whom the Software is |
| 12 | * furnished to do so, subject to the following conditions: |
| 13 | * |
| 14 | * The above copyright notice and this permission notice shall be included in |
| 15 | * all copies or substantial portions of the Software. |
| 16 | * |
| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 23 | * THE SOFTWARE. |
| 24 | */ |
| 25 | |
| 26 | #include "qemu/osdep.h" |
| 27 | |
| 28 | #include "net/net.h" |
| 29 | #include "clients.h" |
| 30 | #include "monitor/monitor.h" |
| 31 | #include "qapi/error.h" |
| 32 | #include "qemu/error-report.h" |
| 33 | #include "qemu/option.h" |
| 34 | #include "qemu/sockets.h" |
| 35 | #include "qemu/iov.h" |
| 36 | #include "qemu/main-loop.h" |
| 37 | #include "qemu/cutils.h" |
| 38 | |
| 39 | typedef struct NetDgramState { |
| 40 | NetClientState nc; |
| 41 | int fd; |
| 42 | SocketReadState rs; |
| 43 | bool read_poll; /* waiting to receive data? */ |
| 44 | bool write_poll; /* waiting to transmit data? */ |
| 45 | /* contains destination iff connectionless */ |
| 46 | struct sockaddr *dest_addr; |
| 47 | socklen_t dest_len; |
| 48 | } NetDgramState; |
| 49 | |
| 50 | static void net_dgram_send(void *opaque); |
| 51 | static void net_dgram_writable(void *opaque); |
| 52 | |
| 53 | static void net_dgram_update_fd_handler(NetDgramState *s) |
| 54 | { |
| 55 | qemu_set_fd_handler(s->fd, |
| 56 | s->read_poll ? net_dgram_send : NULL, |
| 57 | s->write_poll ? net_dgram_writable : NULL, |
| 58 | s); |
| 59 | } |
| 60 | |
| 61 | static void net_dgram_read_poll(NetDgramState *s, bool enable) |
| 62 | { |
| 63 | s->read_poll = enable; |
| 64 | net_dgram_update_fd_handler(s); |
| 65 | } |
| 66 | |
| 67 | static void net_dgram_write_poll(NetDgramState *s, bool enable) |
| 68 | { |
| 69 | s->write_poll = enable; |
| 70 | net_dgram_update_fd_handler(s); |
| 71 | } |
| 72 | |
| 73 | static void net_dgram_writable(void *opaque) |
| 74 | { |
| 75 | NetDgramState *s = opaque; |
| 76 | |
| 77 | net_dgram_write_poll(s, false); |
| 78 | |
| 79 | qemu_flush_queued_packets(&s->nc); |
| 80 | } |
| 81 | |
| 82 | static ssize_t net_dgram_receive(NetClientState *nc, |
| 83 | const uint8_t *buf, size_t size) |
| 84 | { |
| 85 | NetDgramState *s = DO_UPCAST(NetDgramState, nc, nc); |
| 86 | ssize_t ret; |
| 87 | |
| 88 | do { |
| 89 | if (s->dest_addr) { |
| 90 | ret = sendto(s->fd, buf, size, 0, s->dest_addr, s->dest_len); |
| 91 | } else { |
| 92 | ret = send(s->fd, buf, size, 0); |
| 93 | } |
| 94 | } while (ret == -1 && errno == EINTR); |
| 95 | |
| 96 | if (ret == -1 && errno == EAGAIN) { |
| 97 | net_dgram_write_poll(s, true); |
| 98 | return 0; |
| 99 | } |
| 100 | return ret; |
| 101 | } |
| 102 | |
| 103 | static void net_dgram_send_completed(NetClientState *nc, ssize_t len) |
| 104 | { |
| 105 | NetDgramState *s = DO_UPCAST(NetDgramState, nc, nc); |
| 106 | |
| 107 | if (!s->read_poll) { |
| 108 | net_dgram_read_poll(s, true); |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | static void net_dgram_rs_finalize(SocketReadState *rs) |
| 113 | { |
| 114 | NetDgramState *s = container_of(rs, NetDgramState, rs); |
| 115 | |
| 116 | if (qemu_send_packet_async(&s->nc, rs->buf, |
| 117 | rs->packet_len, |
| 118 | net_dgram_send_completed) == 0) { |
| 119 | net_dgram_read_poll(s, false); |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | static void net_dgram_send(void *opaque) |
| 124 | { |
| 125 | NetDgramState *s = opaque; |
| 126 | int size; |
| 127 | |
| 128 | size = recv(s->fd, s->rs.buf, sizeof(s->rs.buf), 0); |
| 129 | if (size < 0) { |
| 130 | return; |
| 131 | } |
| 132 | if (size == 0) { |
| 133 | /* end of connection */ |
| 134 | net_dgram_read_poll(s, false); |
| 135 | net_dgram_write_poll(s, false); |
| 136 | return; |
| 137 | } |
| 138 | if (qemu_send_packet_async(&s->nc, s->rs.buf, size, |
| 139 | net_dgram_send_completed) == 0) { |
| 140 | net_dgram_read_poll(s, false); |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | static int net_dgram_mcast_create(struct sockaddr_in *mcastaddr, |
| 145 | struct in_addr *localaddr, |
| 146 | Error **errp) |
| 147 | { |
| 148 | struct ip_mreq imr; |
| 149 | int fd; |
| 150 | int val, ret; |
| 151 | #ifdef __OpenBSD__ |
| 152 | unsigned char loop; |
| 153 | #else |
| 154 | int loop; |
| 155 | #endif |
| 156 | |
| 157 | if (!IN_MULTICAST(ntohl(mcastaddr->sin_addr.s_addr))) { |
| 158 | error_setg(errp, "specified mcastaddr %s (0x%08x) " |
| 159 | "does not contain a multicast address", |
| 160 | inet_ntoa(mcastaddr->sin_addr), |
| 161 | (int)ntohl(mcastaddr->sin_addr.s_addr)); |
| 162 | return -1; |
| 163 | } |
| 164 | |
| 165 | fd = qemu_socket(PF_INET, SOCK_DGRAM, 0); |
| 166 | if (fd < 0) { |
| 167 | error_setg_errno(errp, errno, "can't create datagram socket"); |
| 168 | return -1; |
| 169 | } |
| 170 | |
| 171 | /* |
| 172 | * Allow multiple sockets to bind the same multicast ip and port by setting |
| 173 | * SO_REUSEADDR. This is the only situation where SO_REUSEADDR should be set |
| 174 | * on windows. Use socket_set_fast_reuse otherwise as it sets SO_REUSEADDR |
| 175 | * only on posix systems. |
| 176 | */ |
| 177 | val = 1; |
| 178 | ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)); |
| 179 | if (ret < 0) { |
| 180 | error_setg_errno(errp, errno, "can't set socket option SO_REUSEADDR"); |
| 181 | goto fail; |
| 182 | } |
| 183 | |
| 184 | ret = bind(fd, (struct sockaddr *)mcastaddr, sizeof(*mcastaddr)); |
| 185 | if (ret < 0) { |
| 186 | error_setg_errno(errp, errno, "can't bind ip=%s to socket", |
| 187 | inet_ntoa(mcastaddr->sin_addr)); |
| 188 | goto fail; |
| 189 | } |
| 190 | |
| 191 | /* Add host to multicast group */ |
| 192 | imr.imr_multiaddr = mcastaddr->sin_addr; |
| 193 | if (localaddr) { |
| 194 | imr.imr_interface = *localaddr; |
| 195 | } else { |
| 196 | imr.imr_interface.s_addr = htonl(INADDR_ANY); |
| 197 | } |
| 198 | |
| 199 | ret = setsockopt(fd, IPPROTO_IP, IP_ADD_MEMBERSHIP, |
| 200 | &imr, sizeof(struct ip_mreq)); |
| 201 | if (ret < 0) { |
| 202 | error_setg_errno(errp, errno, |
| 203 | "can't add socket to multicast group %s", |
| 204 | inet_ntoa(imr.imr_multiaddr)); |
| 205 | goto fail; |
| 206 | } |
| 207 | |
| 208 | /* Force mcast msgs to loopback (eg. several QEMUs in same host */ |
| 209 | loop = 1; |
| 210 | ret = setsockopt(fd, IPPROTO_IP, IP_MULTICAST_LOOP, |
| 211 | &loop, sizeof(loop)); |
| 212 | if (ret < 0) { |
| 213 | error_setg_errno(errp, errno, |
| 214 | "can't force multicast message to loopback"); |
| 215 | goto fail; |
| 216 | } |
| 217 | |
| 218 | /* If a bind address is given, only send packets from that address */ |
| 219 | if (localaddr != NULL) { |
| 220 | ret = setsockopt(fd, IPPROTO_IP, IP_MULTICAST_IF, |
| 221 | localaddr, sizeof(*localaddr)); |
| 222 | if (ret < 0) { |
| 223 | error_setg_errno(errp, errno, |
| 224 | "can't set the default network send interface"); |
| 225 | goto fail; |
| 226 | } |
| 227 | } |
| 228 | |
| 229 | if (!qemu_set_blocking(fd, false, errp)) { |
| 230 | goto fail; |
| 231 | } |
| 232 | |
| 233 | return fd; |
| 234 | fail: |
| 235 | if (fd >= 0) { |
| 236 | close(fd); |
| 237 | } |
| 238 | return -1; |
| 239 | } |
| 240 | |
| 241 | static void net_dgram_cleanup(NetClientState *nc) |
| 242 | { |
| 243 | NetDgramState *s = DO_UPCAST(NetDgramState, nc, nc); |
| 244 | if (s->fd != -1) { |
| 245 | net_dgram_read_poll(s, false); |
| 246 | net_dgram_write_poll(s, false); |
| 247 | close(s->fd); |
| 248 | s->fd = -1; |
| 249 | } |
| 250 | g_free(s->dest_addr); |
| 251 | s->dest_addr = NULL; |
| 252 | s->dest_len = 0; |
| 253 | } |
| 254 | |
| 255 | static NetClientInfo net_dgram_socket_info = { |
| 256 | .type = NET_CLIENT_DRIVER_DGRAM, |
| 257 | .size = sizeof(NetDgramState), |
| 258 | .receive = net_dgram_receive, |
| 259 | .cleanup = net_dgram_cleanup, |
| 260 | }; |
| 261 | |
| 262 | static NetDgramState *net_dgram_fd_init(NetClientState *peer, |
| 263 | const char *model, |
| 264 | const char *name, |
| 265 | int fd, |
| 266 | Error **errp) |
| 267 | { |
| 268 | NetClientState *nc; |
| 269 | NetDgramState *s; |
| 270 | |
| 271 | nc = qemu_new_net_client(&net_dgram_socket_info, peer, model, name); |
| 272 | |
| 273 | s = DO_UPCAST(NetDgramState, nc, nc); |
| 274 | |
| 275 | s->fd = fd; |
| 276 | net_socket_rs_init(&s->rs, net_dgram_rs_finalize, false); |
| 277 | net_dgram_read_poll(s, true); |
| 278 | |
| 279 | return s; |
| 280 | } |
| 281 | |
| 282 | static int net_dgram_mcast_init(NetClientState *peer, |
| 283 | const char *model, |
| 284 | const char *name, |
| 285 | SocketAddress *remote, |
| 286 | SocketAddress *local, |
| 287 | Error **errp) |
| 288 | { |
| 289 | NetDgramState *s; |
| 290 | int fd; |
| 291 | struct sockaddr_in *saddr; |
| 292 | |
| 293 | if (remote->type != SOCKET_ADDRESS_TYPE_INET) { |
| 294 | error_setg(errp, "multicast only support inet type"); |
| 295 | return -1; |
| 296 | } |
| 297 | |
| 298 | saddr = g_new(struct sockaddr_in, 1); |
| 299 | if (convert_host_port(saddr, remote->u.inet.host, remote->u.inet.port, |
| 300 | errp) < 0) { |
| 301 | g_free(saddr); |
| 302 | return -1; |
| 303 | } |
| 304 | |
| 305 | if (!local) { |
| 306 | fd = net_dgram_mcast_create(saddr, NULL, errp); |
| 307 | if (fd < 0) { |
| 308 | g_free(saddr); |
| 309 | return -1; |
| 310 | } |
| 311 | } else { |
| 312 | switch (local->type) { |
| 313 | case SOCKET_ADDRESS_TYPE_INET: { |
| 314 | struct in_addr localaddr; |
| 315 | |
| 316 | if (inet_aton(local->u.inet.host, &localaddr) == 0) { |
| 317 | g_free(saddr); |
| 318 | error_setg(errp, "localaddr '%s' is not a valid IPv4 address", |
| 319 | local->u.inet.host); |
| 320 | return -1; |
| 321 | } |
| 322 | |
| 323 | fd = net_dgram_mcast_create(saddr, &localaddr, errp); |
| 324 | if (fd < 0) { |
| 325 | g_free(saddr); |
| 326 | return -1; |
| 327 | } |
| 328 | break; |
| 329 | } |
| 330 | case SOCKET_ADDRESS_TYPE_FD: { |
| 331 | int newfd; |
| 332 | |
| 333 | fd = monitor_fd_param(monitor_cur(), local->u.fd.str, errp); |
| 334 | if (fd == -1) { |
| 335 | g_free(saddr); |
| 336 | return -1; |
| 337 | } |
| 338 | if (!qemu_set_blocking(fd, false, errp)) { |
| 339 | g_free(saddr); |
| 340 | return -1; |
| 341 | } |
| 342 | |
| 343 | /* |
| 344 | * fd passed: multicast: "learn" dest_addr address from bound |
| 345 | * address and save it. Because this may be "shared" socket from a |
| 346 | * "master" process, datagrams would be recv() by ONLY ONE process: |
| 347 | * we must "clone" this dgram socket --jjo |
| 348 | */ |
| 349 | |
| 350 | saddr = g_new(struct sockaddr_in, 1); |
| 351 | |
| 352 | if (convert_host_port(saddr, local->u.inet.host, local->u.inet.port, |
| 353 | errp) < 0) { |
| 354 | g_free(saddr); |
| 355 | close(fd); |
| 356 | return -1; |
| 357 | } |
| 358 | |
| 359 | /* must be bound */ |
| 360 | if (saddr->sin_addr.s_addr == 0) { |
| 361 | error_setg(errp, "can't setup multicast destination address"); |
| 362 | g_free(saddr); |
| 363 | close(fd); |
| 364 | return -1; |
| 365 | } |
| 366 | /* clone dgram socket */ |
| 367 | newfd = net_dgram_mcast_create(saddr, NULL, errp); |
| 368 | if (newfd < 0) { |
| 369 | g_free(saddr); |
| 370 | close(fd); |
| 371 | return -1; |
| 372 | } |
| 373 | /* clone newfd to fd, close newfd */ |
| 374 | dup2(newfd, fd); |
| 375 | close(newfd); |
| 376 | break; |
| 377 | } |
| 378 | default: |
| 379 | g_free(saddr); |
| 380 | error_setg(errp, "only support inet or fd type for local"); |
| 381 | return -1; |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | s = net_dgram_fd_init(peer, model, name, fd, errp); |
| 386 | if (!s) { |
| 387 | g_free(saddr); |
| 388 | return -1; |
| 389 | } |
| 390 | |
| 391 | g_assert(s->dest_addr == NULL); |
| 392 | s->dest_addr = (struct sockaddr *)saddr; |
| 393 | s->dest_len = sizeof(*saddr); |
| 394 | |
| 395 | if (!local) { |
| 396 | qemu_set_info_str(&s->nc, "mcast=%s:%d", |
| 397 | inet_ntoa(saddr->sin_addr), |
| 398 | ntohs(saddr->sin_port)); |
| 399 | } else { |
| 400 | switch (local->type) { |
| 401 | case SOCKET_ADDRESS_TYPE_INET: |
| 402 | qemu_set_info_str(&s->nc, "mcast=%s:%d", |
| 403 | inet_ntoa(saddr->sin_addr), |
| 404 | ntohs(saddr->sin_port)); |
| 405 | break; |
| 406 | case SOCKET_ADDRESS_TYPE_FD: |
| 407 | qemu_set_info_str(&s->nc, "fd=%d (cloned mcast=%s:%d)", |
| 408 | fd, inet_ntoa(saddr->sin_addr), |
| 409 | ntohs(saddr->sin_port)); |
| 410 | break; |
| 411 | default: |
| 412 | g_assert_not_reached(); |
| 413 | } |
| 414 | } |
| 415 | |
| 416 | return 0; |
| 417 | |
| 418 | } |
| 419 | |
| 420 | |
| 421 | int net_init_dgram(const Netdev *netdev, const char *name, |
| 422 | NetClientState *peer, Error **errp) |
| 423 | { |
| 424 | NetDgramState *s; |
| 425 | int fd, ret; |
| 426 | SocketAddress *remote, *local; |
| 427 | struct sockaddr *dest_addr; |
| 428 | struct sockaddr_in laddr_in, raddr_in; |
| 429 | struct sockaddr_un laddr_un, raddr_un; |
| 430 | socklen_t dest_len; |
| 431 | |
| 432 | assert(netdev->type == NET_CLIENT_DRIVER_DGRAM); |
| 433 | |
| 434 | remote = netdev->u.dgram.remote; |
| 435 | local = netdev->u.dgram.local; |
| 436 | |
| 437 | /* detect multicast address */ |
| 438 | if (remote && remote->type == SOCKET_ADDRESS_TYPE_INET) { |
| 439 | struct sockaddr_in mcastaddr; |
| 440 | |
| 441 | if (convert_host_port(&mcastaddr, remote->u.inet.host, |
| 442 | remote->u.inet.port, errp) < 0) { |
| 443 | return -1; |
| 444 | } |
| 445 | |
| 446 | if (IN_MULTICAST(ntohl(mcastaddr.sin_addr.s_addr))) { |
| 447 | return net_dgram_mcast_init(peer, "dram", name, remote, local, |
| 448 | errp); |
| 449 | } |
| 450 | } |
| 451 | |
| 452 | /* unicast address */ |
| 453 | if (!local) { |
| 454 | error_setg(errp, "dgram requires local= parameter"); |
| 455 | return -1; |
| 456 | } |
| 457 | |
| 458 | if (remote) { |
| 459 | if (local->type == SOCKET_ADDRESS_TYPE_FD) { |
| 460 | error_setg(errp, "don't set remote with local.fd"); |
| 461 | return -1; |
| 462 | } |
| 463 | if (remote->type != local->type) { |
| 464 | error_setg(errp, "remote and local types must be the same"); |
| 465 | return -1; |
| 466 | } |
| 467 | } else { |
| 468 | if (local->type != SOCKET_ADDRESS_TYPE_FD) { |
| 469 | error_setg(errp, |
| 470 | "type=inet or type=unix requires remote parameter"); |
| 471 | return -1; |
| 472 | } |
| 473 | } |
| 474 | |
| 475 | switch (local->type) { |
| 476 | case SOCKET_ADDRESS_TYPE_INET: |
| 477 | if (convert_host_port(&laddr_in, local->u.inet.host, local->u.inet.port, |
| 478 | errp) < 0) { |
| 479 | return -1; |
| 480 | } |
| 481 | |
| 482 | if (convert_host_port(&raddr_in, remote->u.inet.host, |
| 483 | remote->u.inet.port, errp) < 0) { |
| 484 | return -1; |
| 485 | } |
| 486 | |
| 487 | fd = qemu_socket(PF_INET, SOCK_DGRAM, 0); |
| 488 | if (fd < 0) { |
| 489 | error_setg_errno(errp, errno, "can't create datagram socket"); |
| 490 | return -1; |
| 491 | } |
| 492 | |
| 493 | ret = socket_set_fast_reuse(fd); |
| 494 | if (ret < 0) { |
| 495 | error_setg_errno(errp, errno, |
| 496 | "can't set socket option SO_REUSEADDR"); |
| 497 | close(fd); |
| 498 | return -1; |
| 499 | } |
| 500 | ret = bind(fd, (struct sockaddr *)&laddr_in, sizeof(laddr_in)); |
| 501 | if (ret < 0) { |
| 502 | error_setg_errno(errp, errno, "can't bind ip=%s to socket", |
| 503 | inet_ntoa(laddr_in.sin_addr)); |
| 504 | close(fd); |
| 505 | return -1; |
| 506 | } |
| 507 | |
| 508 | if (!qemu_set_blocking(fd, false, errp)) { |
| 509 | close(fd); |
| 510 | return -1; |
| 511 | } |
| 512 | |
| 513 | dest_len = sizeof(raddr_in); |
| 514 | dest_addr = g_malloc(dest_len); |
| 515 | memcpy(dest_addr, &raddr_in, dest_len); |
| 516 | break; |
| 517 | case SOCKET_ADDRESS_TYPE_UNIX: |
| 518 | ret = unlink(local->u.q_unix.path); |
| 519 | if (ret < 0 && errno != ENOENT) { |
| 520 | error_setg_errno(errp, errno, "failed to unlink socket %s", |
| 521 | local->u.q_unix.path); |
| 522 | return -1; |
| 523 | } |
| 524 | |
| 525 | laddr_un.sun_family = PF_UNIX; |
| 526 | ret = snprintf(laddr_un.sun_path, sizeof(laddr_un.sun_path), "%s", |
| 527 | local->u.q_unix.path); |
| 528 | if (ret < 0 || ret >= sizeof(laddr_un.sun_path)) { |
| 529 | error_setg(errp, "UNIX socket path '%s' is too long", |
| 530 | local->u.q_unix.path); |
| 531 | error_append_hint(errp, "Path must be less than %zu bytes\n", |
| 532 | sizeof(laddr_un.sun_path)); |
| 533 | } |
| 534 | |
| 535 | raddr_un.sun_family = PF_UNIX; |
| 536 | ret = snprintf(raddr_un.sun_path, sizeof(raddr_un.sun_path), "%s", |
| 537 | remote->u.q_unix.path); |
| 538 | if (ret < 0 || ret >= sizeof(raddr_un.sun_path)) { |
| 539 | error_setg(errp, "UNIX socket path '%s' is too long", |
| 540 | remote->u.q_unix.path); |
| 541 | error_append_hint(errp, "Path must be less than %zu bytes\n", |
| 542 | sizeof(raddr_un.sun_path)); |
| 543 | } |
| 544 | |
| 545 | fd = qemu_socket(PF_UNIX, SOCK_DGRAM, 0); |
| 546 | if (fd < 0) { |
| 547 | error_setg_errno(errp, errno, "can't create datagram socket"); |
| 548 | return -1; |
| 549 | } |
| 550 | |
| 551 | ret = bind(fd, (struct sockaddr *)&laddr_un, sizeof(laddr_un)); |
| 552 | if (ret < 0) { |
| 553 | error_setg_errno(errp, errno, "can't bind unix=%s to socket", |
| 554 | laddr_un.sun_path); |
| 555 | close(fd); |
| 556 | return -1; |
| 557 | } |
| 558 | if (!qemu_set_blocking(fd, false, errp)) { |
| 559 | close(fd); |
| 560 | return -1; |
| 561 | } |
| 562 | |
| 563 | dest_len = sizeof(raddr_un); |
| 564 | dest_addr = g_malloc(dest_len); |
| 565 | memcpy(dest_addr, &raddr_un, dest_len); |
| 566 | break; |
| 567 | case SOCKET_ADDRESS_TYPE_FD: |
| 568 | fd = monitor_fd_param(monitor_cur(), local->u.fd.str, errp); |
| 569 | if (fd == -1) { |
| 570 | return -1; |
| 571 | } |
| 572 | if (!qemu_set_blocking(fd, false, errp)) { |
| 573 | return -1; |
| 574 | } |
| 575 | dest_addr = NULL; |
| 576 | dest_len = 0; |
| 577 | break; |
| 578 | default: |
| 579 | error_setg(errp, "only support inet or fd type for local"); |
| 580 | return -1; |
| 581 | } |
| 582 | |
| 583 | s = net_dgram_fd_init(peer, "dgram", name, fd, errp); |
| 584 | if (!s) { |
| 585 | return -1; |
| 586 | } |
| 587 | |
| 588 | if (remote) { |
| 589 | g_assert(s->dest_addr == NULL); |
| 590 | s->dest_addr = dest_addr; |
| 591 | s->dest_len = dest_len; |
| 592 | } |
| 593 | |
| 594 | switch (local->type) { |
| 595 | case SOCKET_ADDRESS_TYPE_INET: |
| 596 | qemu_set_info_str(&s->nc, "udp=%s:%d/%s:%d", |
| 597 | inet_ntoa(laddr_in.sin_addr), |
| 598 | ntohs(laddr_in.sin_port), |
| 599 | inet_ntoa(raddr_in.sin_addr), |
| 600 | ntohs(raddr_in.sin_port)); |
| 601 | break; |
| 602 | case SOCKET_ADDRESS_TYPE_UNIX: |
| 603 | qemu_set_info_str(&s->nc, "udp=%s:%s", |
| 604 | laddr_un.sun_path, raddr_un.sun_path); |
| 605 | break; |
| 606 | case SOCKET_ADDRESS_TYPE_FD: { |
| 607 | SocketAddress *sa; |
| 608 | SocketAddressType sa_type; |
| 609 | |
| 610 | sa = socket_local_address(fd, errp); |
| 611 | if (sa) { |
| 612 | sa_type = sa->type; |
| 613 | qapi_free_SocketAddress(sa); |
| 614 | |
| 615 | qemu_set_info_str(&s->nc, "fd=%d %s", fd, |
| 616 | SocketAddressType_str(sa_type)); |
| 617 | } else { |
| 618 | qemu_set_info_str(&s->nc, "fd=%d", fd); |
| 619 | } |
| 620 | break; |
| 621 | } |
| 622 | default: |
| 623 | g_assert_not_reached(); |
| 624 | } |
| 625 | |
| 626 | return 0; |
| 627 | } |