| 1 | /* |
| 2 | * inet and unix socket functions for qemu |
| 3 | * |
| 4 | * (c) 2008 Gerd Hoffmann <kraxel@redhat.com> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; under version 2 of the License. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * Contributions after 2012-01-13 are licensed under the terms of the |
| 16 | * GNU GPL, version 2 or (at your option) any later version. |
| 17 | */ |
| 18 | #include "qemu/osdep.h" |
| 19 | |
| 20 | #ifdef CONFIG_AF_VSOCK |
| 21 | #include <linux/vm_sockets.h> |
| 22 | #endif /* CONFIG_AF_VSOCK */ |
| 23 | |
| 24 | #include "monitor/monitor.h" |
| 25 | #include "qapi/clone-visitor.h" |
| 26 | #include "qapi/error.h" |
| 27 | #include "qapi/qapi-visit-sockets.h" |
| 28 | #include "qemu/sockets.h" |
| 29 | #include "qemu/main-loop.h" |
| 30 | #include "qapi/qobject-input-visitor.h" |
| 31 | #include "qapi/qobject-output-visitor.h" |
| 32 | #include "qemu/cutils.h" |
| 33 | #include "qemu/option.h" |
| 34 | #include "trace.h" |
| 35 | |
| 36 | #ifndef AI_ADDRCONFIG |
| 37 | # define AI_ADDRCONFIG 0 |
| 38 | #endif |
| 39 | |
| 40 | #ifndef AI_V4MAPPED |
| 41 | # define AI_V4MAPPED 0 |
| 42 | #endif |
| 43 | |
| 44 | #ifndef AI_NUMERICSERV |
| 45 | # define AI_NUMERICSERV 0 |
| 46 | #endif |
| 47 | |
| 48 | /* |
| 49 | * On macOS TCP_KEEPIDLE is available under a different name, TCP_KEEPALIVE. |
| 50 | * https://github.com/apple/darwin-xnu/blob/xnu-4570.1.46/bsd/man/man4/tcp.4#L172 |
| 51 | */ |
| 52 | #if defined(TCP_KEEPALIVE) && !defined(TCP_KEEPIDLE) |
| 53 | # define TCP_KEEPIDLE TCP_KEEPALIVE |
| 54 | #endif |
| 55 | |
| 56 | |
| 57 | static int inet_getport(struct addrinfo *e) |
| 58 | { |
| 59 | struct sockaddr_in *i4; |
| 60 | struct sockaddr_in6 *i6; |
| 61 | |
| 62 | switch (e->ai_family) { |
| 63 | case PF_INET6: |
| 64 | i6 = (void*)e->ai_addr; |
| 65 | return ntohs(i6->sin6_port); |
| 66 | case PF_INET: |
| 67 | i4 = (void*)e->ai_addr; |
| 68 | return ntohs(i4->sin_port); |
| 69 | default: |
| 70 | return 0; |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | static void inet_setport(struct addrinfo *e, int port) |
| 75 | { |
| 76 | struct sockaddr_in *i4; |
| 77 | struct sockaddr_in6 *i6; |
| 78 | |
| 79 | switch (e->ai_family) { |
| 80 | case PF_INET6: |
| 81 | i6 = (void*)e->ai_addr; |
| 82 | i6->sin6_port = htons(port); |
| 83 | break; |
| 84 | case PF_INET: |
| 85 | i4 = (void*)e->ai_addr; |
| 86 | i4->sin_port = htons(port); |
| 87 | break; |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | NetworkAddressFamily inet_netfamily(int family) |
| 92 | { |
| 93 | switch (family) { |
| 94 | case PF_INET6: return NETWORK_ADDRESS_FAMILY_IPV6; |
| 95 | case PF_INET: return NETWORK_ADDRESS_FAMILY_IPV4; |
| 96 | case PF_UNIX: return NETWORK_ADDRESS_FAMILY_UNIX; |
| 97 | #ifdef CONFIG_AF_VSOCK |
| 98 | case PF_VSOCK: return NETWORK_ADDRESS_FAMILY_VSOCK; |
| 99 | #endif /* CONFIG_AF_VSOCK */ |
| 100 | } |
| 101 | return NETWORK_ADDRESS_FAMILY_UNKNOWN; |
| 102 | } |
| 103 | |
| 104 | bool fd_is_socket(int fd) |
| 105 | { |
| 106 | int optval; |
| 107 | socklen_t optlen = sizeof(optval); |
| 108 | return !getsockopt(fd, SOL_SOCKET, SO_TYPE, &optval, &optlen); |
| 109 | } |
| 110 | |
| 111 | |
| 112 | /* |
| 113 | * Matrix we're trying to apply |
| 114 | * |
| 115 | * ipv4 ipv6 family |
| 116 | * - - PF_UNSPEC |
| 117 | * - f PF_INET |
| 118 | * - t PF_INET6 |
| 119 | * f - PF_INET6 |
| 120 | * f f <error> |
| 121 | * f t PF_INET6 |
| 122 | * t - PF_INET |
| 123 | * t f PF_INET |
| 124 | * t t PF_INET6/PF_UNSPEC |
| 125 | * |
| 126 | * NB, this matrix is only about getting the necessary results |
| 127 | * from getaddrinfo(). Some of the cases require further work |
| 128 | * after reading results from getaddrinfo in order to fully |
| 129 | * apply the logic the end user wants. |
| 130 | * |
| 131 | * In the first and last cases, we must set IPV6_V6ONLY=0 |
| 132 | * when binding, to allow a single listener to potentially |
| 133 | * accept both IPv4+6 addresses. |
| 134 | */ |
| 135 | int inet_ai_family_from_address(InetSocketAddress *addr, |
| 136 | Error **errp) |
| 137 | { |
| 138 | if (addr->has_ipv6 && addr->has_ipv4 && |
| 139 | !addr->ipv6 && !addr->ipv4) { |
| 140 | error_setg(errp, "Cannot disable IPv4 and IPv6 at same time"); |
| 141 | return PF_UNSPEC; |
| 142 | } |
| 143 | if ((addr->has_ipv6 && addr->ipv6) && (addr->has_ipv4 && addr->ipv4)) { |
| 144 | /* |
| 145 | * Some backends can only do a single listener. In that case |
| 146 | * we want empty hostname to resolve to "::" and then use the |
| 147 | * flag IPV6_V6ONLY==0 to get both protocols on 1 socket. This |
| 148 | * doesn't work for addresses other than "", so they're just |
| 149 | * inevitably broken until multiple listeners can be used, |
| 150 | * and thus we honour getaddrinfo automatic protocol detection |
| 151 | * Once all backends do multi-listener, remove the PF_INET6 |
| 152 | * branch entirely. |
| 153 | */ |
| 154 | if (!addr->host || g_str_equal(addr->host, "")) { |
| 155 | return PF_INET6; |
| 156 | } else { |
| 157 | return PF_UNSPEC; |
| 158 | } |
| 159 | } |
| 160 | if ((addr->has_ipv6 && addr->ipv6) || (addr->has_ipv4 && !addr->ipv4)) { |
| 161 | return PF_INET6; |
| 162 | } |
| 163 | if ((addr->has_ipv4 && addr->ipv4) || (addr->has_ipv6 && !addr->ipv6)) { |
| 164 | return PF_INET; |
| 165 | } |
| 166 | return PF_UNSPEC; |
| 167 | } |
| 168 | |
| 169 | static int create_fast_reuse_socket(struct addrinfo *e) |
| 170 | { |
| 171 | int slisten = qemu_socket(e->ai_family, e->ai_socktype, e->ai_protocol); |
| 172 | if (slisten < 0) { |
| 173 | return -1; |
| 174 | } |
| 175 | socket_set_fast_reuse(slisten); |
| 176 | return slisten; |
| 177 | } |
| 178 | |
| 179 | static int try_bind(int socket, InetSocketAddress *saddr, struct addrinfo *e) |
| 180 | { |
| 181 | #ifndef IPV6_V6ONLY |
| 182 | return bind(socket, e->ai_addr, e->ai_addrlen); |
| 183 | #else |
| 184 | /* |
| 185 | * Deals with first & last cases in matrix in comment |
| 186 | * for inet_ai_family_from_address(). |
| 187 | */ |
| 188 | int v6only = |
| 189 | ((!saddr->has_ipv4 && !saddr->has_ipv6) || |
| 190 | (saddr->has_ipv4 && saddr->ipv4 && |
| 191 | saddr->has_ipv6 && saddr->ipv6)) ? 0 : 1; |
| 192 | int stat; |
| 193 | |
| 194 | rebind: |
| 195 | if (e->ai_family == PF_INET6) { |
| 196 | setsockopt(socket, IPPROTO_IPV6, IPV6_V6ONLY, &v6only, |
| 197 | sizeof(v6only)); |
| 198 | } |
| 199 | |
| 200 | stat = bind(socket, e->ai_addr, e->ai_addrlen); |
| 201 | if (!stat) { |
| 202 | return 0; |
| 203 | } |
| 204 | |
| 205 | /* If we got EADDRINUSE from an IPv6 bind & v6only is unset, |
| 206 | * it could be that the IPv4 port is already claimed, so retry |
| 207 | * with v6only set |
| 208 | */ |
| 209 | if (e->ai_family == PF_INET6 && errno == EADDRINUSE && !v6only) { |
| 210 | v6only = 1; |
| 211 | goto rebind; |
| 212 | } |
| 213 | return stat; |
| 214 | #endif |
| 215 | } |
| 216 | |
| 217 | static int inet_set_sockopts(int sock, InetSocketAddress *saddr, Error **errp) |
| 218 | { |
| 219 | if (saddr->keep_alive) { |
| 220 | int keep_alive = 1; |
| 221 | int ret = setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, |
| 222 | &keep_alive, sizeof(keep_alive)); |
| 223 | |
| 224 | if (ret < 0) { |
| 225 | error_setg_errno(errp, errno, |
| 226 | "Unable to set keep-alive option on socket"); |
| 227 | return -1; |
| 228 | } |
| 229 | #ifdef HAVE_TCP_KEEPCNT |
| 230 | if (saddr->has_keep_alive_count && saddr->keep_alive_count) { |
| 231 | int keep_count = saddr->keep_alive_count; |
| 232 | ret = setsockopt(sock, IPPROTO_TCP, TCP_KEEPCNT, &keep_count, |
| 233 | sizeof(keep_count)); |
| 234 | if (ret < 0) { |
| 235 | error_setg_errno(errp, errno, |
| 236 | "Unable to set TCP keep-alive count option on socket"); |
| 237 | return -1; |
| 238 | } |
| 239 | } |
| 240 | #endif |
| 241 | #ifdef HAVE_TCP_KEEPIDLE |
| 242 | if (saddr->has_keep_alive_idle && saddr->keep_alive_idle) { |
| 243 | int keep_idle = saddr->keep_alive_idle; |
| 244 | ret = setsockopt(sock, IPPROTO_TCP, TCP_KEEPIDLE, &keep_idle, |
| 245 | sizeof(keep_idle)); |
| 246 | if (ret < 0) { |
| 247 | error_setg_errno(errp, errno, |
| 248 | "Unable to set TCP keep-alive idle option on socket"); |
| 249 | return -1; |
| 250 | } |
| 251 | } |
| 252 | #endif |
| 253 | #ifdef HAVE_TCP_KEEPINTVL |
| 254 | if (saddr->has_keep_alive_interval && saddr->keep_alive_interval) { |
| 255 | int keep_interval = saddr->keep_alive_interval; |
| 256 | ret = setsockopt(sock, IPPROTO_TCP, TCP_KEEPINTVL, &keep_interval, |
| 257 | sizeof(keep_interval)); |
| 258 | if (ret < 0) { |
| 259 | error_setg_errno(errp, errno, |
| 260 | "Unable to set TCP keep-alive interval option on socket"); |
| 261 | return -1; |
| 262 | } |
| 263 | } |
| 264 | #endif |
| 265 | } |
| 266 | return 0; |
| 267 | } |
| 268 | |
| 269 | static int inet_listen_saddr(InetSocketAddress *saddr, |
| 270 | int port_offset, |
| 271 | int num, |
| 272 | Error **errp) |
| 273 | { |
| 274 | ERRP_GUARD(); |
| 275 | struct addrinfo ai, *res, *e; |
| 276 | char port[33]; |
| 277 | char uaddr[INET6_ADDRSTRLEN+1]; |
| 278 | char uport[33]; |
| 279 | int rc, port_min, port_max, p; |
| 280 | int slisten = -1; |
| 281 | int saved_errno = 0; |
| 282 | bool socket_created = false; |
| 283 | |
| 284 | memset(&ai,0, sizeof(ai)); |
| 285 | ai.ai_flags = AI_PASSIVE; |
| 286 | if (saddr->has_numeric && saddr->numeric) { |
| 287 | ai.ai_flags |= AI_NUMERICHOST | AI_NUMERICSERV; |
| 288 | } |
| 289 | ai.ai_socktype = SOCK_STREAM; |
| 290 | ai.ai_family = inet_ai_family_from_address(saddr, errp); |
| 291 | if (*errp) { |
| 292 | return -1; |
| 293 | } |
| 294 | |
| 295 | if (saddr->host == NULL) { |
| 296 | error_setg(errp, "host not specified"); |
| 297 | return -1; |
| 298 | } |
| 299 | if (saddr->port != NULL) { |
| 300 | pstrcpy(port, sizeof(port), saddr->port); |
| 301 | } else { |
| 302 | port[0] = '\0'; |
| 303 | } |
| 304 | |
| 305 | /* lookup */ |
| 306 | if (port_offset) { |
| 307 | uint64_t baseport; |
| 308 | if (strlen(port) == 0) { |
| 309 | error_setg(errp, "port not specified"); |
| 310 | return -1; |
| 311 | } |
| 312 | if (parse_uint_full(port, 10, &baseport) < 0) { |
| 313 | error_setg(errp, "can't convert to a number: %s", port); |
| 314 | return -1; |
| 315 | } |
| 316 | if (baseport > 65535 || |
| 317 | baseport + port_offset > 65535) { |
| 318 | error_setg(errp, "port %s out of range", port); |
| 319 | return -1; |
| 320 | } |
| 321 | snprintf(port, sizeof(port), "%d", (int)baseport + port_offset); |
| 322 | } |
| 323 | rc = getaddrinfo(strlen(saddr->host) ? saddr->host : NULL, |
| 324 | strlen(port) ? port : NULL, &ai, &res); |
| 325 | if (rc != 0) { |
| 326 | error_setg(errp, "address resolution failed for %s:%s: %s", |
| 327 | saddr->host, port, gai_strerror(rc)); |
| 328 | return -1; |
| 329 | } |
| 330 | |
| 331 | /* create socket + bind/listen */ |
| 332 | for (e = res; e != NULL; e = e->ai_next) { |
| 333 | #ifdef HAVE_IPPROTO_MPTCP |
| 334 | if (saddr->has_mptcp && saddr->mptcp) { |
| 335 | e->ai_protocol = IPPROTO_MPTCP; |
| 336 | } |
| 337 | #endif |
| 338 | getnameinfo((struct sockaddr*)e->ai_addr,e->ai_addrlen, |
| 339 | uaddr,INET6_ADDRSTRLEN,uport,32, |
| 340 | NI_NUMERICHOST | NI_NUMERICSERV); |
| 341 | |
| 342 | port_min = inet_getport(e); |
| 343 | port_max = saddr->has_to ? saddr->to + port_offset : port_min; |
| 344 | for (p = port_min; p <= port_max; p++) { |
| 345 | if (slisten >= 0) { |
| 346 | /* |
| 347 | * We have a socket we tried with the previous port. It cannot |
| 348 | * be rebound, we need to close it and create a new one. |
| 349 | */ |
| 350 | close(slisten); |
| 351 | slisten = -1; |
| 352 | } |
| 353 | inet_setport(e, p); |
| 354 | |
| 355 | slisten = create_fast_reuse_socket(e); |
| 356 | if (slisten < 0) { |
| 357 | /* |
| 358 | * First time we expect we might fail to create the socket |
| 359 | * eg if 'e' has AF_INET6 but ipv6 kmod is not loaded. |
| 360 | * Later iterations should always succeed if first iteration |
| 361 | * worked though, so treat that as fatal. |
| 362 | */ |
| 363 | if (p == port_min) { |
| 364 | continue; |
| 365 | } else { |
| 366 | error_setg_errno(errp, errno, |
| 367 | "Failed to recreate failed listening socket"); |
| 368 | goto fail; |
| 369 | } |
| 370 | } |
| 371 | socket_created = true; |
| 372 | |
| 373 | rc = try_bind(slisten, saddr, e); |
| 374 | if (rc < 0) { |
| 375 | if (errno == EADDRINUSE) { |
| 376 | /* This port is already used, try the next one */ |
| 377 | continue; |
| 378 | } |
| 379 | error_setg_errno(errp, errno, "Failed to bind socket"); |
| 380 | goto fail; |
| 381 | } |
| 382 | if (listen(slisten, num)) { |
| 383 | if (errno == EADDRINUSE) { |
| 384 | /* This port is already used, try the next one */ |
| 385 | continue; |
| 386 | } |
| 387 | error_setg_errno(errp, errno, "Failed to listen on socket"); |
| 388 | goto fail; |
| 389 | } |
| 390 | /* We have a listening socket */ |
| 391 | if (inet_set_sockopts(slisten, saddr, errp) < 0) { |
| 392 | goto fail; |
| 393 | } |
| 394 | freeaddrinfo(res); |
| 395 | return slisten; |
| 396 | } |
| 397 | } |
| 398 | error_setg_errno(errp, errno, |
| 399 | socket_created ? |
| 400 | "Failed to find an available port" : |
| 401 | "Failed to create a socket"); |
| 402 | fail: |
| 403 | saved_errno = errno; |
| 404 | if (slisten >= 0) { |
| 405 | close(slisten); |
| 406 | } |
| 407 | freeaddrinfo(res); |
| 408 | errno = saved_errno; |
| 409 | return -1; |
| 410 | } |
| 411 | |
| 412 | #ifdef _WIN32 |
| 413 | #define QEMU_SOCKET_RC_INPROGRESS(rc) \ |
| 414 | ((rc) == -EINPROGRESS || (rc) == -EWOULDBLOCK || (rc) == -WSAEALREADY) |
| 415 | #else |
| 416 | #define QEMU_SOCKET_RC_INPROGRESS(rc) \ |
| 417 | ((rc) == -EINPROGRESS) |
| 418 | #endif |
| 419 | |
| 420 | static int inet_connect_addr(const InetSocketAddress *saddr, |
| 421 | struct addrinfo *addr, Error **errp) |
| 422 | { |
| 423 | int sock, rc; |
| 424 | |
| 425 | sock = qemu_socket(addr->ai_family, addr->ai_socktype, addr->ai_protocol); |
| 426 | if (sock < 0) { |
| 427 | error_setg_errno(errp, errno, "Failed to create socket family %d", |
| 428 | addr->ai_family); |
| 429 | return -1; |
| 430 | } |
| 431 | |
| 432 | /* connect to peer */ |
| 433 | do { |
| 434 | rc = 0; |
| 435 | if (connect(sock, addr->ai_addr, addr->ai_addrlen) < 0) { |
| 436 | rc = -errno; |
| 437 | } |
| 438 | } while (rc == -EINTR); |
| 439 | |
| 440 | if (rc < 0) { |
| 441 | error_setg_errno(errp, errno, "Failed to connect to '%s:%s'", |
| 442 | saddr->host, saddr->port); |
| 443 | close(sock); |
| 444 | return -1; |
| 445 | } |
| 446 | |
| 447 | return sock; |
| 448 | } |
| 449 | |
| 450 | static struct addrinfo *inet_parse_connect_saddr(InetSocketAddress *saddr, |
| 451 | Error **errp) |
| 452 | { |
| 453 | ERRP_GUARD(); |
| 454 | struct addrinfo ai, *res; |
| 455 | int rc; |
| 456 | static int useV4Mapped = 1; |
| 457 | |
| 458 | memset(&ai, 0, sizeof(ai)); |
| 459 | |
| 460 | ai.ai_flags = AI_CANONNAME | AI_ADDRCONFIG; |
| 461 | if (qatomic_read(&useV4Mapped)) { |
| 462 | ai.ai_flags |= AI_V4MAPPED; |
| 463 | } |
| 464 | ai.ai_socktype = SOCK_STREAM; |
| 465 | ai.ai_family = inet_ai_family_from_address(saddr, errp); |
| 466 | if (*errp) { |
| 467 | return NULL; |
| 468 | } |
| 469 | |
| 470 | if (saddr->host == NULL || saddr->port == NULL) { |
| 471 | error_setg(errp, "host and/or port not specified"); |
| 472 | return NULL; |
| 473 | } |
| 474 | |
| 475 | /* lookup */ |
| 476 | rc = getaddrinfo(saddr->host, saddr->port, &ai, &res); |
| 477 | |
| 478 | /* At least FreeBSD and OS-X 10.6 declare AI_V4MAPPED but |
| 479 | * then don't implement it in their getaddrinfo(). Detect |
| 480 | * this and retry without the flag since that's preferable |
| 481 | * to a fatal error |
| 482 | */ |
| 483 | if (rc == EAI_BADFLAGS && |
| 484 | (ai.ai_flags & AI_V4MAPPED)) { |
| 485 | qatomic_set(&useV4Mapped, 0); |
| 486 | ai.ai_flags &= ~AI_V4MAPPED; |
| 487 | rc = getaddrinfo(saddr->host, saddr->port, &ai, &res); |
| 488 | } |
| 489 | if (rc != 0) { |
| 490 | error_setg(errp, "address resolution failed for %s:%s: %s", |
| 491 | saddr->host, saddr->port, gai_strerror(rc)); |
| 492 | return NULL; |
| 493 | } |
| 494 | return res; |
| 495 | } |
| 496 | |
| 497 | /** |
| 498 | * Create a socket and connect it to an address. |
| 499 | * |
| 500 | * @saddr: Inet socket address specification |
| 501 | * @errp: set on error |
| 502 | * |
| 503 | * Returns: -1 on error, file descriptor on success. |
| 504 | */ |
| 505 | int inet_connect_saddr(InetSocketAddress *saddr, Error **errp) |
| 506 | { |
| 507 | Error *local_err = NULL; |
| 508 | struct addrinfo *res, *e; |
| 509 | int sock = -1; |
| 510 | |
| 511 | res = inet_parse_connect_saddr(saddr, errp); |
| 512 | if (!res) { |
| 513 | return -1; |
| 514 | } |
| 515 | |
| 516 | for (e = res; e != NULL; e = e->ai_next) { |
| 517 | error_free(local_err); |
| 518 | local_err = NULL; |
| 519 | |
| 520 | #ifdef HAVE_IPPROTO_MPTCP |
| 521 | if (saddr->has_mptcp && saddr->mptcp) { |
| 522 | e->ai_protocol = IPPROTO_MPTCP; |
| 523 | } |
| 524 | #endif |
| 525 | |
| 526 | sock = inet_connect_addr(saddr, e, &local_err); |
| 527 | if (sock >= 0) { |
| 528 | break; |
| 529 | } |
| 530 | } |
| 531 | |
| 532 | freeaddrinfo(res); |
| 533 | |
| 534 | if (sock < 0) { |
| 535 | error_propagate(errp, local_err); |
| 536 | return sock; |
| 537 | } |
| 538 | |
| 539 | if (inet_set_sockopts(sock, saddr, errp) < 0) { |
| 540 | close(sock); |
| 541 | return -1; |
| 542 | } |
| 543 | |
| 544 | return sock; |
| 545 | } |
| 546 | |
| 547 | static int inet_dgram_saddr(InetSocketAddress *sraddr, |
| 548 | InetSocketAddress *sladdr, |
| 549 | Error **errp) |
| 550 | { |
| 551 | ERRP_GUARD(); |
| 552 | struct addrinfo ai, *peer = NULL, *local = NULL; |
| 553 | const char *addr; |
| 554 | const char *port; |
| 555 | int sock = -1, rc; |
| 556 | |
| 557 | /* lookup peer addr */ |
| 558 | memset(&ai,0, sizeof(ai)); |
| 559 | ai.ai_flags = AI_CANONNAME | AI_V4MAPPED | AI_ADDRCONFIG; |
| 560 | ai.ai_socktype = SOCK_DGRAM; |
| 561 | ai.ai_family = inet_ai_family_from_address(sraddr, errp); |
| 562 | if (*errp) { |
| 563 | goto err; |
| 564 | } |
| 565 | |
| 566 | addr = sraddr->host; |
| 567 | port = sraddr->port; |
| 568 | if (addr == NULL || strlen(addr) == 0) { |
| 569 | addr = "localhost"; |
| 570 | } |
| 571 | if (port == NULL || strlen(port) == 0) { |
| 572 | error_setg(errp, "remote port not specified"); |
| 573 | goto err; |
| 574 | } |
| 575 | |
| 576 | if ((rc = getaddrinfo(addr, port, &ai, &peer)) != 0) { |
| 577 | error_setg(errp, "address resolution failed for %s:%s: %s", addr, port, |
| 578 | gai_strerror(rc)); |
| 579 | goto err; |
| 580 | } |
| 581 | |
| 582 | /* lookup local addr */ |
| 583 | memset(&ai,0, sizeof(ai)); |
| 584 | ai.ai_flags = AI_PASSIVE; |
| 585 | ai.ai_family = peer->ai_family; |
| 586 | ai.ai_socktype = SOCK_DGRAM; |
| 587 | |
| 588 | if (sladdr) { |
| 589 | addr = sladdr->host; |
| 590 | port = sladdr->port; |
| 591 | if (addr == NULL || strlen(addr) == 0) { |
| 592 | addr = NULL; |
| 593 | } |
| 594 | if (!port || strlen(port) == 0) { |
| 595 | port = "0"; |
| 596 | } |
| 597 | } else { |
| 598 | addr = NULL; |
| 599 | port = "0"; |
| 600 | } |
| 601 | |
| 602 | if ((rc = getaddrinfo(addr, port, &ai, &local)) != 0) { |
| 603 | error_setg(errp, "address resolution failed for %s:%s: %s", addr, port, |
| 604 | gai_strerror(rc)); |
| 605 | goto err; |
| 606 | } |
| 607 | |
| 608 | /* create socket */ |
| 609 | sock = qemu_socket(peer->ai_family, peer->ai_socktype, peer->ai_protocol); |
| 610 | if (sock < 0) { |
| 611 | error_setg_errno(errp, errno, "Failed to create socket family %d", |
| 612 | peer->ai_family); |
| 613 | goto err; |
| 614 | } |
| 615 | socket_set_fast_reuse(sock); |
| 616 | |
| 617 | /* bind socket */ |
| 618 | if (bind(sock, local->ai_addr, local->ai_addrlen) < 0) { |
| 619 | error_setg_errno(errp, errno, "Failed to bind socket"); |
| 620 | goto err; |
| 621 | } |
| 622 | |
| 623 | /* connect to peer */ |
| 624 | if (connect(sock,peer->ai_addr,peer->ai_addrlen) < 0) { |
| 625 | error_setg_errno(errp, errno, "Failed to connect to '%s:%s'", |
| 626 | addr, port); |
| 627 | goto err; |
| 628 | } |
| 629 | |
| 630 | freeaddrinfo(local); |
| 631 | freeaddrinfo(peer); |
| 632 | return sock; |
| 633 | |
| 634 | err: |
| 635 | if (sock != -1) { |
| 636 | close(sock); |
| 637 | } |
| 638 | if (local) { |
| 639 | freeaddrinfo(local); |
| 640 | } |
| 641 | if (peer) { |
| 642 | freeaddrinfo(peer); |
| 643 | } |
| 644 | |
| 645 | return -1; |
| 646 | } |
| 647 | |
| 648 | static QemuOptsList inet_opts = { |
| 649 | .name = "InetSocketAddress", |
| 650 | .head = QTAILQ_HEAD_INITIALIZER(inet_opts.head), |
| 651 | .implied_opt_name = "addr", |
| 652 | .desc = { |
| 653 | { |
| 654 | .name = "addr", |
| 655 | .type = QEMU_OPT_STRING, |
| 656 | }, |
| 657 | { |
| 658 | .name = "numeric", |
| 659 | .type = QEMU_OPT_BOOL, |
| 660 | }, |
| 661 | { |
| 662 | .name = "to", |
| 663 | .type = QEMU_OPT_NUMBER, |
| 664 | }, |
| 665 | { |
| 666 | .name = "ipv4", |
| 667 | .type = QEMU_OPT_BOOL, |
| 668 | }, |
| 669 | { |
| 670 | .name = "ipv6", |
| 671 | .type = QEMU_OPT_BOOL, |
| 672 | }, |
| 673 | { |
| 674 | .name = "keep-alive", |
| 675 | .type = QEMU_OPT_BOOL, |
| 676 | }, |
| 677 | #ifdef HAVE_TCP_KEEPCNT |
| 678 | { |
| 679 | .name = "keep-alive-count", |
| 680 | .type = QEMU_OPT_NUMBER, |
| 681 | }, |
| 682 | #endif |
| 683 | #ifdef HAVE_TCP_KEEPIDLE |
| 684 | { |
| 685 | .name = "keep-alive-idle", |
| 686 | .type = QEMU_OPT_NUMBER, |
| 687 | }, |
| 688 | #endif |
| 689 | #ifdef HAVE_TCP_KEEPINTVL |
| 690 | { |
| 691 | .name = "keep-alive-interval", |
| 692 | .type = QEMU_OPT_NUMBER, |
| 693 | }, |
| 694 | #endif |
| 695 | #ifdef HAVE_IPPROTO_MPTCP |
| 696 | { |
| 697 | .name = "mptcp", |
| 698 | .type = QEMU_OPT_BOOL, |
| 699 | }, |
| 700 | #endif |
| 701 | { /* end of list */ } |
| 702 | }, |
| 703 | }; |
| 704 | |
| 705 | int inet_parse(InetSocketAddress *addr, const char *str, Error **errp) |
| 706 | { |
| 707 | QemuOpts *opts = qemu_opts_parse(&inet_opts, str, true, errp); |
| 708 | if (!opts) { |
| 709 | return -1; |
| 710 | } |
| 711 | memset(addr, 0, sizeof(*addr)); |
| 712 | |
| 713 | /* parse address */ |
| 714 | const char *addr_str = qemu_opt_get(opts, "addr"); |
| 715 | if (!addr_str) { |
| 716 | error_setg(errp, "error parsing address ''"); |
| 717 | return -1; |
| 718 | } |
| 719 | if (str[0] == '[') { |
| 720 | /* IPv6 addr */ |
| 721 | const char *ip_end = strstr(addr_str, "]:"); |
| 722 | if (!ip_end || ip_end - addr_str < 2 || strlen(ip_end) < 3) { |
| 723 | error_setg(errp, "error parsing IPv6 address '%s'", addr_str); |
| 724 | return -1; |
| 725 | } |
| 726 | addr->host = g_strndup(addr_str + 1, ip_end - addr_str - 1); |
| 727 | addr->port = g_strdup(ip_end + 2); |
| 728 | } else { |
| 729 | /* no host, hostname or IPv4 addr */ |
| 730 | const char *port = strchr(addr_str, ':'); |
| 731 | if (!port || strlen(port) < 2) { |
| 732 | error_setg(errp, "error parsing address '%s'", addr_str); |
| 733 | return -1; |
| 734 | } |
| 735 | addr->host = g_strndup(addr_str, port - addr_str); |
| 736 | addr->port = g_strdup(port + 1); |
| 737 | } |
| 738 | |
| 739 | /* parse options */ |
| 740 | if (qemu_opt_find(opts, "numeric")) { |
| 741 | addr->has_numeric = true, |
| 742 | addr->numeric = qemu_opt_get_bool(opts, "numeric", false); |
| 743 | } |
| 744 | if (qemu_opt_find(opts, "to")) { |
| 745 | addr->has_to = true; |
| 746 | addr->to = qemu_opt_get_number(opts, "to", 0); |
| 747 | } |
| 748 | if (qemu_opt_find(opts, "ipv4")) { |
| 749 | addr->has_ipv4 = true; |
| 750 | addr->ipv4 = qemu_opt_get_bool(opts, "ipv4", false); |
| 751 | } |
| 752 | if (qemu_opt_find(opts, "ipv6")) { |
| 753 | addr->has_ipv6 = true; |
| 754 | addr->ipv6 = qemu_opt_get_bool(opts, "ipv6", false); |
| 755 | } |
| 756 | if (qemu_opt_find(opts, "keep-alive")) { |
| 757 | addr->has_keep_alive = true; |
| 758 | addr->keep_alive = qemu_opt_get_bool(opts, "keep-alive", false); |
| 759 | } |
| 760 | #ifdef HAVE_TCP_KEEPCNT |
| 761 | if (qemu_opt_find(opts, "keep-alive-count")) { |
| 762 | addr->has_keep_alive_count = true; |
| 763 | addr->keep_alive_count = qemu_opt_get_number(opts, "keep-alive-count", 0); |
| 764 | } |
| 765 | #endif |
| 766 | #ifdef HAVE_TCP_KEEPIDLE |
| 767 | if (qemu_opt_find(opts, "keep-alive-idle")) { |
| 768 | addr->has_keep_alive_idle = true; |
| 769 | addr->keep_alive_idle = qemu_opt_get_number(opts, "keep-alive-idle", 0); |
| 770 | } |
| 771 | #endif |
| 772 | #ifdef HAVE_TCP_KEEPINTVL |
| 773 | if (qemu_opt_find(opts, "keep-alive-interval")) { |
| 774 | addr->has_keep_alive_interval = true; |
| 775 | addr->keep_alive_interval = qemu_opt_get_number(opts, "keep-alive-interval", 0); |
| 776 | } |
| 777 | #endif |
| 778 | #ifdef HAVE_IPPROTO_MPTCP |
| 779 | if (qemu_opt_find(opts, "mptcp")) { |
| 780 | addr->has_mptcp = true; |
| 781 | addr->mptcp = qemu_opt_get_bool(opts, "mptcp", 0); |
| 782 | } |
| 783 | #endif |
| 784 | return 0; |
| 785 | } |
| 786 | |
| 787 | |
| 788 | #ifdef CONFIG_AF_VSOCK |
| 789 | static bool vsock_parse_vaddr_to_sockaddr(const VsockSocketAddress *vaddr, |
| 790 | struct sockaddr_vm *svm, |
| 791 | Error **errp) |
| 792 | { |
| 793 | uint64_t val; |
| 794 | |
| 795 | memset(svm, 0, sizeof(*svm)); |
| 796 | svm->svm_family = AF_VSOCK; |
| 797 | |
| 798 | if (parse_uint_full(vaddr->cid, 10, &val) < 0 || |
| 799 | val > UINT32_MAX) { |
| 800 | error_setg(errp, "Failed to parse cid '%s'", vaddr->cid); |
| 801 | return false; |
| 802 | } |
| 803 | svm->svm_cid = val; |
| 804 | |
| 805 | if (parse_uint_full(vaddr->port, 10, &val) < 0 || |
| 806 | val > UINT32_MAX) { |
| 807 | error_setg(errp, "Failed to parse port '%s'", vaddr->port); |
| 808 | return false; |
| 809 | } |
| 810 | svm->svm_port = val; |
| 811 | |
| 812 | return true; |
| 813 | } |
| 814 | |
| 815 | static int vsock_connect_addr(const VsockSocketAddress *vaddr, |
| 816 | const struct sockaddr_vm *svm, Error **errp) |
| 817 | { |
| 818 | int sock, rc; |
| 819 | |
| 820 | sock = qemu_socket(AF_VSOCK, SOCK_STREAM, 0); |
| 821 | if (sock < 0) { |
| 822 | error_setg_errno(errp, errno, "Failed to create socket family %d", |
| 823 | AF_VSOCK); |
| 824 | return -1; |
| 825 | } |
| 826 | |
| 827 | /* connect to peer */ |
| 828 | do { |
| 829 | rc = 0; |
| 830 | if (connect(sock, (const struct sockaddr *)svm, sizeof(*svm)) < 0) { |
| 831 | rc = -errno; |
| 832 | } |
| 833 | } while (rc == -EINTR); |
| 834 | |
| 835 | if (rc < 0) { |
| 836 | error_setg_errno(errp, errno, "Failed to connect to '%s:%s'", |
| 837 | vaddr->cid, vaddr->port); |
| 838 | close(sock); |
| 839 | return -1; |
| 840 | } |
| 841 | |
| 842 | return sock; |
| 843 | } |
| 844 | |
| 845 | static int vsock_connect_saddr(VsockSocketAddress *vaddr, Error **errp) |
| 846 | { |
| 847 | struct sockaddr_vm svm; |
| 848 | |
| 849 | if (!vsock_parse_vaddr_to_sockaddr(vaddr, &svm, errp)) { |
| 850 | return -1; |
| 851 | } |
| 852 | |
| 853 | return vsock_connect_addr(vaddr, &svm, errp); |
| 854 | } |
| 855 | |
| 856 | static int vsock_listen_saddr(VsockSocketAddress *vaddr, |
| 857 | int num, |
| 858 | Error **errp) |
| 859 | { |
| 860 | struct sockaddr_vm svm; |
| 861 | int slisten; |
| 862 | |
| 863 | if (!vsock_parse_vaddr_to_sockaddr(vaddr, &svm, errp)) { |
| 864 | return -1; |
| 865 | } |
| 866 | |
| 867 | slisten = qemu_socket(AF_VSOCK, SOCK_STREAM, 0); |
| 868 | if (slisten < 0) { |
| 869 | error_setg_errno(errp, errno, "Failed to create socket"); |
| 870 | return -1; |
| 871 | } |
| 872 | |
| 873 | if (bind(slisten, (const struct sockaddr *)&svm, sizeof(svm)) != 0) { |
| 874 | error_setg_errno(errp, errno, "Failed to bind socket"); |
| 875 | close(slisten); |
| 876 | return -1; |
| 877 | } |
| 878 | |
| 879 | if (listen(slisten, num) != 0) { |
| 880 | error_setg_errno(errp, errno, "Failed to listen on socket"); |
| 881 | close(slisten); |
| 882 | return -1; |
| 883 | } |
| 884 | return slisten; |
| 885 | } |
| 886 | |
| 887 | static int vsock_parse(VsockSocketAddress *addr, const char *str, |
| 888 | Error **errp) |
| 889 | { |
| 890 | char cid[33]; |
| 891 | char port[33]; |
| 892 | int n; |
| 893 | |
| 894 | if (sscanf(str, "%32[^:]:%32[^,]%n", cid, port, &n) != 2) { |
| 895 | error_setg(errp, "error parsing address '%s'", str); |
| 896 | return -1; |
| 897 | } |
| 898 | if (str[n] != '\0') { |
| 899 | error_setg(errp, "trailing characters in address '%s'", str); |
| 900 | return -1; |
| 901 | } |
| 902 | |
| 903 | addr->cid = g_strdup(cid); |
| 904 | addr->port = g_strdup(port); |
| 905 | return 0; |
| 906 | } |
| 907 | #else |
| 908 | static void vsock_unsupported(Error **errp) |
| 909 | { |
| 910 | error_setg(errp, "socket family AF_VSOCK unsupported"); |
| 911 | } |
| 912 | |
| 913 | static int vsock_connect_saddr(VsockSocketAddress *vaddr, Error **errp) |
| 914 | { |
| 915 | vsock_unsupported(errp); |
| 916 | return -1; |
| 917 | } |
| 918 | |
| 919 | static int vsock_listen_saddr(VsockSocketAddress *vaddr, |
| 920 | int num, |
| 921 | Error **errp) |
| 922 | { |
| 923 | vsock_unsupported(errp); |
| 924 | return -1; |
| 925 | } |
| 926 | |
| 927 | static int vsock_parse(VsockSocketAddress *addr, const char *str, |
| 928 | Error **errp) |
| 929 | { |
| 930 | vsock_unsupported(errp); |
| 931 | return -1; |
| 932 | } |
| 933 | #endif /* CONFIG_AF_VSOCK */ |
| 934 | |
| 935 | static bool saddr_is_abstract(UnixSocketAddress *saddr) |
| 936 | { |
| 937 | #ifdef CONFIG_LINUX |
| 938 | return saddr->abstract; |
| 939 | #else |
| 940 | return false; |
| 941 | #endif |
| 942 | } |
| 943 | |
| 944 | static bool saddr_is_tight(UnixSocketAddress *saddr) |
| 945 | { |
| 946 | #ifdef CONFIG_LINUX |
| 947 | return !saddr->has_tight || saddr->tight; |
| 948 | #else |
| 949 | return false; |
| 950 | #endif |
| 951 | } |
| 952 | |
| 953 | static int unix_listen_saddr(UnixSocketAddress *saddr, |
| 954 | int num, |
| 955 | Error **errp) |
| 956 | { |
| 957 | bool abstract = saddr_is_abstract(saddr); |
| 958 | struct sockaddr_un un; |
| 959 | int sock, fd; |
| 960 | char *pathbuf = NULL; |
| 961 | const char *path; |
| 962 | size_t pathlen; |
| 963 | size_t addrlen; |
| 964 | |
| 965 | sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0); |
| 966 | if (sock < 0) { |
| 967 | error_setg_errno(errp, errno, "Failed to create Unix socket"); |
| 968 | return -1; |
| 969 | } |
| 970 | |
| 971 | if (saddr->path[0] || abstract) { |
| 972 | path = saddr->path; |
| 973 | } else { |
| 974 | path = pathbuf = g_strdup_printf("%s/qemu-socket-XXXXXX", |
| 975 | g_get_tmp_dir()); |
| 976 | } |
| 977 | |
| 978 | pathlen = strlen(path); |
| 979 | if (pathlen > sizeof(un.sun_path) || |
| 980 | (abstract && pathlen > (sizeof(un.sun_path) - 1))) { |
| 981 | error_setg(errp, "UNIX socket path '%s' is too long", path); |
| 982 | error_append_hint(errp, "Path must be less than %zu bytes\n", |
| 983 | abstract ? sizeof(un.sun_path) - 1 : |
| 984 | sizeof(un.sun_path)); |
| 985 | goto err; |
| 986 | } |
| 987 | |
| 988 | if (pathbuf != NULL) { |
| 989 | /* |
| 990 | * This dummy fd usage silences the mktemp() insecure warning. |
| 991 | * Using mkstemp() doesn't make things more secure here |
| 992 | * though. bind() complains about existing files, so we have |
| 993 | * to unlink first and thus re-open the race window. The |
| 994 | * worst case possible is bind() failing, i.e. a DoS attack. |
| 995 | */ |
| 996 | fd = mkstemp(pathbuf); |
| 997 | if (fd < 0) { |
| 998 | error_setg_errno(errp, errno, |
| 999 | "Failed to make a temporary socket %s", pathbuf); |
| 1000 | goto err; |
| 1001 | } |
| 1002 | close(fd); |
| 1003 | } |
| 1004 | |
| 1005 | if (!abstract && unlink(path) < 0 && errno != ENOENT) { |
| 1006 | error_setg_errno(errp, errno, |
| 1007 | "Failed to unlink socket %s", path); |
| 1008 | goto err; |
| 1009 | } |
| 1010 | |
| 1011 | memset(&un, 0, sizeof(un)); |
| 1012 | un.sun_family = AF_UNIX; |
| 1013 | addrlen = sizeof(un); |
| 1014 | |
| 1015 | if (abstract) { |
| 1016 | un.sun_path[0] = '\0'; |
| 1017 | memcpy(&un.sun_path[1], path, pathlen); |
| 1018 | if (saddr_is_tight(saddr)) { |
| 1019 | addrlen = offsetof(struct sockaddr_un, sun_path) + 1 + pathlen; |
| 1020 | } |
| 1021 | } else { |
| 1022 | memcpy(un.sun_path, path, pathlen); |
| 1023 | } |
| 1024 | |
| 1025 | if (bind(sock, (struct sockaddr *) &un, addrlen) < 0) { |
| 1026 | error_setg_errno(errp, errno, "Failed to bind socket to %s", path); |
| 1027 | goto err; |
| 1028 | } |
| 1029 | if (listen(sock, num) < 0) { |
| 1030 | error_setg_errno(errp, errno, "Failed to listen on socket"); |
| 1031 | goto err; |
| 1032 | } |
| 1033 | |
| 1034 | g_free(pathbuf); |
| 1035 | return sock; |
| 1036 | |
| 1037 | err: |
| 1038 | g_free(pathbuf); |
| 1039 | close(sock); |
| 1040 | return -1; |
| 1041 | } |
| 1042 | |
| 1043 | static int unix_connect_saddr(UnixSocketAddress *saddr, Error **errp) |
| 1044 | { |
| 1045 | bool abstract = saddr_is_abstract(saddr); |
| 1046 | struct sockaddr_un un; |
| 1047 | int sock, rc; |
| 1048 | size_t pathlen; |
| 1049 | size_t addrlen; |
| 1050 | |
| 1051 | if (saddr->path == NULL) { |
| 1052 | error_setg(errp, "unix connect: no path specified"); |
| 1053 | return -1; |
| 1054 | } |
| 1055 | |
| 1056 | sock = qemu_socket(PF_UNIX, SOCK_STREAM, 0); |
| 1057 | if (sock < 0) { |
| 1058 | error_setg_errno(errp, errno, "Failed to create socket"); |
| 1059 | return -1; |
| 1060 | } |
| 1061 | |
| 1062 | pathlen = strlen(saddr->path); |
| 1063 | if (pathlen > sizeof(un.sun_path) || |
| 1064 | (abstract && pathlen > (sizeof(un.sun_path) - 1))) { |
| 1065 | error_setg(errp, "UNIX socket path '%s' is too long", saddr->path); |
| 1066 | error_append_hint(errp, "Path must be less than %zu bytes\n", |
| 1067 | abstract ? sizeof(un.sun_path) - 1 : |
| 1068 | sizeof(un.sun_path)); |
| 1069 | goto err; |
| 1070 | } |
| 1071 | |
| 1072 | memset(&un, 0, sizeof(un)); |
| 1073 | un.sun_family = AF_UNIX; |
| 1074 | addrlen = sizeof(un); |
| 1075 | |
| 1076 | if (abstract) { |
| 1077 | un.sun_path[0] = '\0'; |
| 1078 | memcpy(&un.sun_path[1], saddr->path, pathlen); |
| 1079 | if (saddr_is_tight(saddr)) { |
| 1080 | addrlen = offsetof(struct sockaddr_un, sun_path) + 1 + pathlen; |
| 1081 | } |
| 1082 | } else { |
| 1083 | memcpy(un.sun_path, saddr->path, pathlen); |
| 1084 | } |
| 1085 | /* connect to peer */ |
| 1086 | do { |
| 1087 | rc = 0; |
| 1088 | if (connect(sock, (struct sockaddr *) &un, addrlen) < 0) { |
| 1089 | rc = -errno; |
| 1090 | } |
| 1091 | } while (rc == -EINTR); |
| 1092 | |
| 1093 | if (rc < 0) { |
| 1094 | error_setg_errno(errp, -rc, "Failed to connect to '%s'", |
| 1095 | saddr->path); |
| 1096 | goto err; |
| 1097 | } |
| 1098 | |
| 1099 | return sock; |
| 1100 | |
| 1101 | err: |
| 1102 | close(sock); |
| 1103 | return -1; |
| 1104 | } |
| 1105 | |
| 1106 | /* compatibility wrapper */ |
| 1107 | int unix_listen(const char *str, Error **errp) |
| 1108 | { |
| 1109 | UnixSocketAddress *saddr; |
| 1110 | int sock; |
| 1111 | |
| 1112 | saddr = g_new0(UnixSocketAddress, 1); |
| 1113 | saddr->path = g_strdup(str); |
| 1114 | sock = unix_listen_saddr(saddr, 1, errp); |
| 1115 | qapi_free_UnixSocketAddress(saddr); |
| 1116 | return sock; |
| 1117 | } |
| 1118 | |
| 1119 | int unix_connect(const char *path, Error **errp) |
| 1120 | { |
| 1121 | UnixSocketAddress *saddr; |
| 1122 | int sock; |
| 1123 | |
| 1124 | saddr = g_new0(UnixSocketAddress, 1); |
| 1125 | saddr->path = g_strdup(path); |
| 1126 | sock = unix_connect_saddr(saddr, errp); |
| 1127 | qapi_free_UnixSocketAddress(saddr); |
| 1128 | return sock; |
| 1129 | } |
| 1130 | |
| 1131 | char *socket_uri(SocketAddress *addr) |
| 1132 | { |
| 1133 | switch (addr->type) { |
| 1134 | case SOCKET_ADDRESS_TYPE_INET: |
| 1135 | return g_strdup_printf("tcp:%s:%s", |
| 1136 | addr->u.inet.host, |
| 1137 | addr->u.inet.port); |
| 1138 | case SOCKET_ADDRESS_TYPE_UNIX: |
| 1139 | return g_strdup_printf("unix:%s", |
| 1140 | addr->u.q_unix.path); |
| 1141 | case SOCKET_ADDRESS_TYPE_FD: |
| 1142 | return g_strdup_printf("fd:%s", addr->u.fd.str); |
| 1143 | case SOCKET_ADDRESS_TYPE_VSOCK: |
| 1144 | return g_strdup_printf("vsock:%s:%s", |
| 1145 | addr->u.vsock.cid, |
| 1146 | addr->u.vsock.port); |
| 1147 | default: |
| 1148 | return g_strdup("unknown address type"); |
| 1149 | } |
| 1150 | } |
| 1151 | |
| 1152 | SocketAddress *socket_parse(const char *str, Error **errp) |
| 1153 | { |
| 1154 | SocketAddress *addr; |
| 1155 | |
| 1156 | addr = g_new0(SocketAddress, 1); |
| 1157 | if (strstart(str, "unix:", NULL)) { |
| 1158 | if (str[5] == '\0') { |
| 1159 | error_setg(errp, "invalid Unix socket address"); |
| 1160 | goto fail; |
| 1161 | } else { |
| 1162 | addr->type = SOCKET_ADDRESS_TYPE_UNIX; |
| 1163 | addr->u.q_unix.path = g_strdup(str + 5); |
| 1164 | } |
| 1165 | } else if (strstart(str, "fd:", NULL)) { |
| 1166 | if (str[3] == '\0') { |
| 1167 | error_setg(errp, "invalid file descriptor address"); |
| 1168 | goto fail; |
| 1169 | } else { |
| 1170 | addr->type = SOCKET_ADDRESS_TYPE_FD; |
| 1171 | addr->u.fd.str = g_strdup(str + 3); |
| 1172 | } |
| 1173 | } else if (strstart(str, "vsock:", NULL)) { |
| 1174 | addr->type = SOCKET_ADDRESS_TYPE_VSOCK; |
| 1175 | if (vsock_parse(&addr->u.vsock, str + strlen("vsock:"), errp)) { |
| 1176 | goto fail; |
| 1177 | } |
| 1178 | } else if (strstart(str, "tcp:", NULL)) { |
| 1179 | addr->type = SOCKET_ADDRESS_TYPE_INET; |
| 1180 | if (inet_parse(&addr->u.inet, str + strlen("tcp:"), errp)) { |
| 1181 | goto fail; |
| 1182 | } |
| 1183 | } else { |
| 1184 | addr->type = SOCKET_ADDRESS_TYPE_INET; |
| 1185 | if (inet_parse(&addr->u.inet, str, errp)) { |
| 1186 | goto fail; |
| 1187 | } |
| 1188 | } |
| 1189 | return addr; |
| 1190 | |
| 1191 | fail: |
| 1192 | qapi_free_SocketAddress(addr); |
| 1193 | return NULL; |
| 1194 | } |
| 1195 | |
| 1196 | static int socket_get_fd(const char *fdstr, Error **errp) |
| 1197 | { |
| 1198 | Monitor *cur_mon = monitor_cur(); |
| 1199 | int fd; |
| 1200 | if (cur_mon) { |
| 1201 | fd = monitor_get_fd(cur_mon, fdstr, errp); |
| 1202 | if (fd < 0) { |
| 1203 | return -1; |
| 1204 | } |
| 1205 | } else { |
| 1206 | if (qemu_strtoi(fdstr, NULL, 10, &fd) < 0) { |
| 1207 | error_setg_errno(errp, errno, |
| 1208 | "Unable to parse FD number %s", |
| 1209 | fdstr); |
| 1210 | return -1; |
| 1211 | } |
| 1212 | } |
| 1213 | if (!fd_is_socket(fd)) { |
| 1214 | error_setg(errp, "File descriptor '%s' is not a socket", fdstr); |
| 1215 | close(fd); |
| 1216 | return -1; |
| 1217 | } |
| 1218 | return fd; |
| 1219 | } |
| 1220 | |
| 1221 | int socket_address_parse_named_fd(SocketAddress *addr, Error **errp) |
| 1222 | { |
| 1223 | int fd; |
| 1224 | |
| 1225 | if (addr->type != SOCKET_ADDRESS_TYPE_FD) { |
| 1226 | return 0; |
| 1227 | } |
| 1228 | |
| 1229 | fd = socket_get_fd(addr->u.fd.str, errp); |
| 1230 | if (fd < 0) { |
| 1231 | return fd; |
| 1232 | } |
| 1233 | |
| 1234 | g_free(addr->u.fd.str); |
| 1235 | addr->u.fd.str = g_strdup_printf("%d", fd); |
| 1236 | |
| 1237 | return 0; |
| 1238 | } |
| 1239 | |
| 1240 | int socket_connect(SocketAddress *addr, Error **errp) |
| 1241 | { |
| 1242 | int fd; |
| 1243 | |
| 1244 | switch (addr->type) { |
| 1245 | case SOCKET_ADDRESS_TYPE_INET: |
| 1246 | fd = inet_connect_saddr(&addr->u.inet, errp); |
| 1247 | break; |
| 1248 | |
| 1249 | case SOCKET_ADDRESS_TYPE_UNIX: |
| 1250 | fd = unix_connect_saddr(&addr->u.q_unix, errp); |
| 1251 | break; |
| 1252 | |
| 1253 | case SOCKET_ADDRESS_TYPE_FD: |
| 1254 | fd = socket_get_fd(addr->u.fd.str, errp); |
| 1255 | break; |
| 1256 | |
| 1257 | case SOCKET_ADDRESS_TYPE_VSOCK: |
| 1258 | fd = vsock_connect_saddr(&addr->u.vsock, errp); |
| 1259 | break; |
| 1260 | |
| 1261 | default: |
| 1262 | abort(); |
| 1263 | } |
| 1264 | return fd; |
| 1265 | } |
| 1266 | |
| 1267 | int socket_listen(SocketAddress *addr, int num, Error **errp) |
| 1268 | { |
| 1269 | int fd; |
| 1270 | |
| 1271 | trace_socket_listen(num); |
| 1272 | switch (addr->type) { |
| 1273 | case SOCKET_ADDRESS_TYPE_INET: |
| 1274 | fd = inet_listen_saddr(&addr->u.inet, 0, num, errp); |
| 1275 | break; |
| 1276 | |
| 1277 | case SOCKET_ADDRESS_TYPE_UNIX: |
| 1278 | fd = unix_listen_saddr(&addr->u.q_unix, num, errp); |
| 1279 | break; |
| 1280 | |
| 1281 | case SOCKET_ADDRESS_TYPE_FD: |
| 1282 | fd = socket_get_fd(addr->u.fd.str, errp); |
| 1283 | if (fd < 0) { |
| 1284 | return -1; |
| 1285 | } |
| 1286 | |
| 1287 | /* |
| 1288 | * If the socket is not yet in the listen state, then transition it to |
| 1289 | * the listen state now. |
| 1290 | * |
| 1291 | * If it's already listening then this updates the backlog value as |
| 1292 | * requested. |
| 1293 | * |
| 1294 | * If this socket cannot listen because it's already in another state |
| 1295 | * (e.g. unbound or connected) then we'll catch the error here. |
| 1296 | */ |
| 1297 | if (listen(fd, num) != 0) { |
| 1298 | error_setg_errno(errp, errno, "Failed to listen on fd socket"); |
| 1299 | close(fd); |
| 1300 | return -1; |
| 1301 | } |
| 1302 | break; |
| 1303 | |
| 1304 | case SOCKET_ADDRESS_TYPE_VSOCK: |
| 1305 | fd = vsock_listen_saddr(&addr->u.vsock, num, errp); |
| 1306 | break; |
| 1307 | |
| 1308 | default: |
| 1309 | abort(); |
| 1310 | } |
| 1311 | return fd; |
| 1312 | } |
| 1313 | |
| 1314 | void socket_listen_cleanup(int fd, Error **errp) |
| 1315 | { |
| 1316 | SocketAddress *addr; |
| 1317 | |
| 1318 | addr = socket_local_address(fd, errp); |
| 1319 | if (!addr) { |
| 1320 | return; |
| 1321 | } |
| 1322 | |
| 1323 | if (addr->type == SOCKET_ADDRESS_TYPE_UNIX |
| 1324 | && addr->u.q_unix.path) { |
| 1325 | if (unlink(addr->u.q_unix.path) < 0 && errno != ENOENT) { |
| 1326 | error_setg_errno(errp, errno, |
| 1327 | "Failed to unlink socket %s", |
| 1328 | addr->u.q_unix.path); |
| 1329 | } |
| 1330 | } |
| 1331 | |
| 1332 | qapi_free_SocketAddress(addr); |
| 1333 | } |
| 1334 | |
| 1335 | int socket_dgram(SocketAddress *remote, SocketAddress *local, Error **errp) |
| 1336 | { |
| 1337 | int fd; |
| 1338 | |
| 1339 | /* |
| 1340 | * TODO SOCKET_ADDRESS_TYPE_FD when fd is AF_INET or AF_INET6 |
| 1341 | * (although other address families can do SOCK_DGRAM, too) |
| 1342 | */ |
| 1343 | switch (remote->type) { |
| 1344 | case SOCKET_ADDRESS_TYPE_INET: |
| 1345 | fd = inet_dgram_saddr(&remote->u.inet, |
| 1346 | local ? &local->u.inet : NULL, errp); |
| 1347 | break; |
| 1348 | |
| 1349 | default: |
| 1350 | error_setg(errp, "socket type unsupported for datagram"); |
| 1351 | fd = -1; |
| 1352 | } |
| 1353 | return fd; |
| 1354 | } |
| 1355 | |
| 1356 | |
| 1357 | static SocketAddress * |
| 1358 | socket_sockaddr_to_address_inet(struct sockaddr_storage *sa, |
| 1359 | socklen_t salen, |
| 1360 | Error **errp) |
| 1361 | { |
| 1362 | char host[NI_MAXHOST]; |
| 1363 | char serv[NI_MAXSERV]; |
| 1364 | SocketAddress *addr; |
| 1365 | InetSocketAddress *inet; |
| 1366 | int ret; |
| 1367 | |
| 1368 | ret = getnameinfo((struct sockaddr *)sa, salen, |
| 1369 | host, sizeof(host), |
| 1370 | serv, sizeof(serv), |
| 1371 | NI_NUMERICHOST | NI_NUMERICSERV); |
| 1372 | if (ret != 0) { |
| 1373 | error_setg(errp, "Cannot format numeric socket address: %s", |
| 1374 | gai_strerror(ret)); |
| 1375 | return NULL; |
| 1376 | } |
| 1377 | |
| 1378 | addr = g_new0(SocketAddress, 1); |
| 1379 | addr->type = SOCKET_ADDRESS_TYPE_INET; |
| 1380 | inet = &addr->u.inet; |
| 1381 | inet->host = g_strdup(host); |
| 1382 | inet->port = g_strdup(serv); |
| 1383 | if (sa->ss_family == AF_INET) { |
| 1384 | inet->has_ipv4 = inet->ipv4 = true; |
| 1385 | } else { |
| 1386 | inet->has_ipv6 = inet->ipv6 = true; |
| 1387 | } |
| 1388 | |
| 1389 | return addr; |
| 1390 | } |
| 1391 | |
| 1392 | |
| 1393 | static SocketAddress * |
| 1394 | socket_sockaddr_to_address_unix(struct sockaddr_storage *sa, |
| 1395 | socklen_t salen, |
| 1396 | Error **errp) |
| 1397 | { |
| 1398 | SocketAddress *addr; |
| 1399 | struct sockaddr_un *su = (struct sockaddr_un *)sa; |
| 1400 | |
| 1401 | addr = g_new0(SocketAddress, 1); |
| 1402 | addr->type = SOCKET_ADDRESS_TYPE_UNIX; |
| 1403 | salen -= offsetof(struct sockaddr_un, sun_path); |
| 1404 | #ifdef CONFIG_LINUX |
| 1405 | if (salen > 0 && !su->sun_path[0]) { |
| 1406 | /* Linux abstract socket */ |
| 1407 | addr->u.q_unix.path = g_strndup(su->sun_path + 1, salen - 1); |
| 1408 | addr->u.q_unix.has_abstract = true; |
| 1409 | addr->u.q_unix.abstract = true; |
| 1410 | addr->u.q_unix.has_tight = true; |
| 1411 | addr->u.q_unix.tight = salen < sizeof(su->sun_path); |
| 1412 | return addr; |
| 1413 | } |
| 1414 | #endif |
| 1415 | |
| 1416 | addr->u.q_unix.path = g_strndup(su->sun_path, salen); |
| 1417 | return addr; |
| 1418 | } |
| 1419 | |
| 1420 | #ifdef CONFIG_AF_VSOCK |
| 1421 | static SocketAddress * |
| 1422 | socket_sockaddr_to_address_vsock(struct sockaddr_storage *sa, |
| 1423 | socklen_t salen, |
| 1424 | Error **errp) |
| 1425 | { |
| 1426 | SocketAddress *addr; |
| 1427 | VsockSocketAddress *vaddr; |
| 1428 | struct sockaddr_vm *svm = (struct sockaddr_vm *)sa; |
| 1429 | |
| 1430 | addr = g_new0(SocketAddress, 1); |
| 1431 | addr->type = SOCKET_ADDRESS_TYPE_VSOCK; |
| 1432 | vaddr = &addr->u.vsock; |
| 1433 | vaddr->cid = g_strdup_printf("%u", svm->svm_cid); |
| 1434 | vaddr->port = g_strdup_printf("%u", svm->svm_port); |
| 1435 | |
| 1436 | return addr; |
| 1437 | } |
| 1438 | #endif /* CONFIG_AF_VSOCK */ |
| 1439 | |
| 1440 | SocketAddress * |
| 1441 | socket_sockaddr_to_address(struct sockaddr_storage *sa, |
| 1442 | socklen_t salen, |
| 1443 | Error **errp) |
| 1444 | { |
| 1445 | switch (sa->ss_family) { |
| 1446 | case AF_INET: |
| 1447 | case AF_INET6: |
| 1448 | return socket_sockaddr_to_address_inet(sa, salen, errp); |
| 1449 | |
| 1450 | case AF_UNIX: |
| 1451 | return socket_sockaddr_to_address_unix(sa, salen, errp); |
| 1452 | |
| 1453 | #ifdef CONFIG_AF_VSOCK |
| 1454 | case AF_VSOCK: |
| 1455 | return socket_sockaddr_to_address_vsock(sa, salen, errp); |
| 1456 | #endif |
| 1457 | |
| 1458 | default: |
| 1459 | error_setg(errp, "socket family %d unsupported", |
| 1460 | sa->ss_family); |
| 1461 | return NULL; |
| 1462 | } |
| 1463 | return 0; |
| 1464 | } |
| 1465 | |
| 1466 | |
| 1467 | SocketAddress *socket_local_address(int fd, Error **errp) |
| 1468 | { |
| 1469 | struct sockaddr_storage ss; |
| 1470 | socklen_t sslen = sizeof(ss); |
| 1471 | |
| 1472 | if (getsockname(fd, (struct sockaddr *)&ss, &sslen) < 0) { |
| 1473 | error_setg_errno(errp, errno, "%s", |
| 1474 | "Unable to query local socket address"); |
| 1475 | return NULL; |
| 1476 | } |
| 1477 | |
| 1478 | return socket_sockaddr_to_address(&ss, sslen, errp); |
| 1479 | } |
| 1480 | |
| 1481 | |
| 1482 | SocketAddress *socket_address_flatten(SocketAddressLegacy *addr_legacy) |
| 1483 | { |
| 1484 | SocketAddress *addr; |
| 1485 | |
| 1486 | if (!addr_legacy) { |
| 1487 | return NULL; |
| 1488 | } |
| 1489 | |
| 1490 | addr = g_new(SocketAddress, 1); |
| 1491 | |
| 1492 | switch (addr_legacy->type) { |
| 1493 | case SOCKET_ADDRESS_TYPE_INET: |
| 1494 | addr->type = SOCKET_ADDRESS_TYPE_INET; |
| 1495 | QAPI_CLONE_MEMBERS(InetSocketAddress, &addr->u.inet, |
| 1496 | addr_legacy->u.inet.data); |
| 1497 | break; |
| 1498 | case SOCKET_ADDRESS_TYPE_UNIX: |
| 1499 | addr->type = SOCKET_ADDRESS_TYPE_UNIX; |
| 1500 | QAPI_CLONE_MEMBERS(UnixSocketAddress, &addr->u.q_unix, |
| 1501 | addr_legacy->u.q_unix.data); |
| 1502 | break; |
| 1503 | case SOCKET_ADDRESS_TYPE_VSOCK: |
| 1504 | addr->type = SOCKET_ADDRESS_TYPE_VSOCK; |
| 1505 | QAPI_CLONE_MEMBERS(VsockSocketAddress, &addr->u.vsock, |
| 1506 | addr_legacy->u.vsock.data); |
| 1507 | break; |
| 1508 | case SOCKET_ADDRESS_TYPE_FD: |
| 1509 | addr->type = SOCKET_ADDRESS_TYPE_FD; |
| 1510 | QAPI_CLONE_MEMBERS(FdSocketAddress, &addr->u.fd, |
| 1511 | addr_legacy->u.fd.data); |
| 1512 | break; |
| 1513 | default: |
| 1514 | abort(); |
| 1515 | } |
| 1516 | |
| 1517 | return addr; |
| 1518 | } |