Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 1 | /* |
| 2 | * QEMU I/O channels sockets driver |
| 3 | * |
| 4 | * Copyright (c) 2015 Red Hat, Inc. |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This library is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
| 17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| 18 | * |
| 19 | */ |
| 20 | |
Peter Maydell | cae9fc5 | 2016-01-29 17:50:03 +0000 | [diff] [blame] | 21 | #include "qemu/osdep.h" |
Markus Armbruster | da34e65 | 2016-03-14 09:01:28 +0100 | [diff] [blame] | 22 | #include "qapi/error.h" |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 23 | #include "io/channel-socket.h" |
| 24 | #include "io/channel-watch.h" |
| 25 | #include "trace.h" |
| 26 | |
| 27 | #define SOCKET_MAX_FDS 16 |
| 28 | |
| 29 | SocketAddress * |
| 30 | qio_channel_socket_get_local_address(QIOChannelSocket *ioc, |
| 31 | Error **errp) |
| 32 | { |
| 33 | return socket_sockaddr_to_address(&ioc->localAddr, |
| 34 | ioc->localAddrLen, |
| 35 | errp); |
| 36 | } |
| 37 | |
| 38 | SocketAddress * |
| 39 | qio_channel_socket_get_remote_address(QIOChannelSocket *ioc, |
| 40 | Error **errp) |
| 41 | { |
| 42 | return socket_sockaddr_to_address(&ioc->remoteAddr, |
| 43 | ioc->remoteAddrLen, |
| 44 | errp); |
| 45 | } |
| 46 | |
| 47 | QIOChannelSocket * |
| 48 | qio_channel_socket_new(void) |
| 49 | { |
| 50 | QIOChannelSocket *sioc; |
| 51 | QIOChannel *ioc; |
| 52 | |
| 53 | sioc = QIO_CHANNEL_SOCKET(object_new(TYPE_QIO_CHANNEL_SOCKET)); |
| 54 | sioc->fd = -1; |
| 55 | |
| 56 | ioc = QIO_CHANNEL(sioc); |
| 57 | ioc->features |= (1 << QIO_CHANNEL_FEATURE_SHUTDOWN); |
| 58 | |
Paolo Bonzini | a589720 | 2016-03-07 12:12:36 +0100 | [diff] [blame] | 59 | #ifdef WIN32 |
| 60 | ioc->event = CreateEvent(NULL, FALSE, FALSE, NULL); |
| 61 | #endif |
| 62 | |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 63 | trace_qio_channel_socket_new(sioc); |
| 64 | |
| 65 | return sioc; |
| 66 | } |
| 67 | |
| 68 | |
| 69 | static int |
| 70 | qio_channel_socket_set_fd(QIOChannelSocket *sioc, |
| 71 | int fd, |
| 72 | Error **errp) |
| 73 | { |
Marc-André Lureau | 3fa27a9 | 2016-06-16 21:28:51 +0200 | [diff] [blame] | 74 | int val; |
| 75 | socklen_t len = sizeof(val); |
| 76 | |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 77 | if (sioc->fd != -1) { |
| 78 | error_setg(errp, "Socket is already open"); |
| 79 | return -1; |
| 80 | } |
| 81 | |
| 82 | sioc->fd = fd; |
| 83 | sioc->remoteAddrLen = sizeof(sioc->remoteAddr); |
| 84 | sioc->localAddrLen = sizeof(sioc->localAddr); |
| 85 | |
| 86 | |
| 87 | if (getpeername(fd, (struct sockaddr *)&sioc->remoteAddr, |
| 88 | &sioc->remoteAddrLen) < 0) { |
Daniel P. Berrange | b16a44e | 2016-03-07 20:36:03 +0000 | [diff] [blame] | 89 | if (errno == ENOTCONN) { |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 90 | memset(&sioc->remoteAddr, 0, sizeof(sioc->remoteAddr)); |
| 91 | sioc->remoteAddrLen = sizeof(sioc->remoteAddr); |
| 92 | } else { |
Daniel P. Berrange | b16a44e | 2016-03-07 20:36:03 +0000 | [diff] [blame] | 93 | error_setg_errno(errp, errno, |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 94 | "Unable to query remote socket address"); |
| 95 | goto error; |
| 96 | } |
| 97 | } |
| 98 | |
| 99 | if (getsockname(fd, (struct sockaddr *)&sioc->localAddr, |
| 100 | &sioc->localAddrLen) < 0) { |
Daniel P. Berrange | b16a44e | 2016-03-07 20:36:03 +0000 | [diff] [blame] | 101 | error_setg_errno(errp, errno, |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 102 | "Unable to query local socket address"); |
| 103 | goto error; |
| 104 | } |
| 105 | |
| 106 | #ifndef WIN32 |
| 107 | if (sioc->localAddr.ss_family == AF_UNIX) { |
| 108 | QIOChannel *ioc = QIO_CHANNEL(sioc); |
| 109 | ioc->features |= (1 << QIO_CHANNEL_FEATURE_FD_PASS); |
| 110 | } |
| 111 | #endif /* WIN32 */ |
Marc-André Lureau | 3fa27a9 | 2016-06-16 21:28:51 +0200 | [diff] [blame] | 112 | if (getsockopt(fd, SOL_SOCKET, SO_ACCEPTCONN, &val, &len) == 0 && val) { |
| 113 | QIOChannel *ioc = QIO_CHANNEL(sioc); |
| 114 | ioc->features |= (1 << QIO_CHANNEL_FEATURE_LISTEN); |
| 115 | } |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 116 | |
| 117 | return 0; |
| 118 | |
| 119 | error: |
| 120 | sioc->fd = -1; /* Let the caller close FD on failure */ |
| 121 | return -1; |
| 122 | } |
| 123 | |
| 124 | QIOChannelSocket * |
| 125 | qio_channel_socket_new_fd(int fd, |
| 126 | Error **errp) |
| 127 | { |
| 128 | QIOChannelSocket *ioc; |
| 129 | |
| 130 | ioc = qio_channel_socket_new(); |
| 131 | if (qio_channel_socket_set_fd(ioc, fd, errp) < 0) { |
| 132 | object_unref(OBJECT(ioc)); |
| 133 | return NULL; |
| 134 | } |
| 135 | |
| 136 | trace_qio_channel_socket_new_fd(ioc, fd); |
| 137 | |
| 138 | return ioc; |
| 139 | } |
| 140 | |
| 141 | |
| 142 | int qio_channel_socket_connect_sync(QIOChannelSocket *ioc, |
| 143 | SocketAddress *addr, |
| 144 | Error **errp) |
| 145 | { |
| 146 | int fd; |
| 147 | |
| 148 | trace_qio_channel_socket_connect_sync(ioc, addr); |
| 149 | fd = socket_connect(addr, errp, NULL, NULL); |
| 150 | if (fd < 0) { |
| 151 | trace_qio_channel_socket_connect_fail(ioc); |
| 152 | return -1; |
| 153 | } |
| 154 | |
| 155 | trace_qio_channel_socket_connect_complete(ioc, fd); |
| 156 | if (qio_channel_socket_set_fd(ioc, fd, errp) < 0) { |
| 157 | close(fd); |
| 158 | return -1; |
| 159 | } |
| 160 | |
| 161 | return 0; |
| 162 | } |
| 163 | |
| 164 | |
| 165 | static int qio_channel_socket_connect_worker(QIOTask *task, |
| 166 | Error **errp, |
| 167 | gpointer opaque) |
| 168 | { |
| 169 | QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); |
| 170 | SocketAddress *addr = opaque; |
| 171 | int ret; |
| 172 | |
| 173 | ret = qio_channel_socket_connect_sync(ioc, |
| 174 | addr, |
| 175 | errp); |
| 176 | |
| 177 | object_unref(OBJECT(ioc)); |
| 178 | return ret; |
| 179 | } |
| 180 | |
| 181 | |
| 182 | void qio_channel_socket_connect_async(QIOChannelSocket *ioc, |
| 183 | SocketAddress *addr, |
| 184 | QIOTaskFunc callback, |
| 185 | gpointer opaque, |
| 186 | GDestroyNotify destroy) |
| 187 | { |
| 188 | QIOTask *task = qio_task_new( |
| 189 | OBJECT(ioc), callback, opaque, destroy); |
| 190 | SocketAddress *addrCopy; |
| 191 | |
| 192 | qapi_copy_SocketAddress(&addrCopy, addr); |
| 193 | |
| 194 | /* socket_connect() does a non-blocking connect(), but it |
| 195 | * still blocks in DNS lookups, so we must use a thread */ |
| 196 | trace_qio_channel_socket_connect_async(ioc, addr); |
| 197 | qio_task_run_in_thread(task, |
| 198 | qio_channel_socket_connect_worker, |
| 199 | addrCopy, |
| 200 | (GDestroyNotify)qapi_free_SocketAddress); |
| 201 | } |
| 202 | |
| 203 | |
| 204 | int qio_channel_socket_listen_sync(QIOChannelSocket *ioc, |
| 205 | SocketAddress *addr, |
| 206 | Error **errp) |
| 207 | { |
| 208 | int fd; |
| 209 | |
| 210 | trace_qio_channel_socket_listen_sync(ioc, addr); |
| 211 | fd = socket_listen(addr, errp); |
| 212 | if (fd < 0) { |
| 213 | trace_qio_channel_socket_listen_fail(ioc); |
| 214 | return -1; |
| 215 | } |
| 216 | |
| 217 | trace_qio_channel_socket_listen_complete(ioc, fd); |
| 218 | if (qio_channel_socket_set_fd(ioc, fd, errp) < 0) { |
| 219 | close(fd); |
| 220 | return -1; |
| 221 | } |
| 222 | |
| 223 | return 0; |
| 224 | } |
| 225 | |
| 226 | |
| 227 | static int qio_channel_socket_listen_worker(QIOTask *task, |
| 228 | Error **errp, |
| 229 | gpointer opaque) |
| 230 | { |
| 231 | QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); |
| 232 | SocketAddress *addr = opaque; |
| 233 | int ret; |
| 234 | |
| 235 | ret = qio_channel_socket_listen_sync(ioc, |
| 236 | addr, |
| 237 | errp); |
| 238 | |
| 239 | object_unref(OBJECT(ioc)); |
| 240 | return ret; |
| 241 | } |
| 242 | |
| 243 | |
| 244 | void qio_channel_socket_listen_async(QIOChannelSocket *ioc, |
| 245 | SocketAddress *addr, |
| 246 | QIOTaskFunc callback, |
| 247 | gpointer opaque, |
| 248 | GDestroyNotify destroy) |
| 249 | { |
| 250 | QIOTask *task = qio_task_new( |
| 251 | OBJECT(ioc), callback, opaque, destroy); |
| 252 | SocketAddress *addrCopy; |
| 253 | |
| 254 | qapi_copy_SocketAddress(&addrCopy, addr); |
| 255 | |
| 256 | /* socket_listen() blocks in DNS lookups, so we must use a thread */ |
| 257 | trace_qio_channel_socket_listen_async(ioc, addr); |
| 258 | qio_task_run_in_thread(task, |
| 259 | qio_channel_socket_listen_worker, |
| 260 | addrCopy, |
| 261 | (GDestroyNotify)qapi_free_SocketAddress); |
| 262 | } |
| 263 | |
| 264 | |
| 265 | int qio_channel_socket_dgram_sync(QIOChannelSocket *ioc, |
| 266 | SocketAddress *localAddr, |
| 267 | SocketAddress *remoteAddr, |
| 268 | Error **errp) |
| 269 | { |
| 270 | int fd; |
| 271 | |
| 272 | trace_qio_channel_socket_dgram_sync(ioc, localAddr, remoteAddr); |
Paolo Bonzini | 150dcd1 | 2016-02-09 11:59:15 +0100 | [diff] [blame] | 273 | fd = socket_dgram(remoteAddr, localAddr, errp); |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 274 | if (fd < 0) { |
| 275 | trace_qio_channel_socket_dgram_fail(ioc); |
| 276 | return -1; |
| 277 | } |
| 278 | |
| 279 | trace_qio_channel_socket_dgram_complete(ioc, fd); |
| 280 | if (qio_channel_socket_set_fd(ioc, fd, errp) < 0) { |
| 281 | close(fd); |
| 282 | return -1; |
| 283 | } |
| 284 | |
| 285 | return 0; |
| 286 | } |
| 287 | |
| 288 | |
| 289 | struct QIOChannelSocketDGramWorkerData { |
| 290 | SocketAddress *localAddr; |
| 291 | SocketAddress *remoteAddr; |
| 292 | }; |
| 293 | |
| 294 | |
| 295 | static void qio_channel_socket_dgram_worker_free(gpointer opaque) |
| 296 | { |
| 297 | struct QIOChannelSocketDGramWorkerData *data = opaque; |
| 298 | qapi_free_SocketAddress(data->localAddr); |
| 299 | qapi_free_SocketAddress(data->remoteAddr); |
| 300 | g_free(data); |
| 301 | } |
| 302 | |
| 303 | static int qio_channel_socket_dgram_worker(QIOTask *task, |
| 304 | Error **errp, |
| 305 | gpointer opaque) |
| 306 | { |
| 307 | QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task)); |
| 308 | struct QIOChannelSocketDGramWorkerData *data = opaque; |
| 309 | int ret; |
| 310 | |
| 311 | /* socket_dgram() blocks in DNS lookups, so we must use a thread */ |
| 312 | ret = qio_channel_socket_dgram_sync(ioc, |
| 313 | data->localAddr, |
| 314 | data->remoteAddr, |
| 315 | errp); |
| 316 | |
| 317 | object_unref(OBJECT(ioc)); |
| 318 | return ret; |
| 319 | } |
| 320 | |
| 321 | |
| 322 | void qio_channel_socket_dgram_async(QIOChannelSocket *ioc, |
| 323 | SocketAddress *localAddr, |
| 324 | SocketAddress *remoteAddr, |
| 325 | QIOTaskFunc callback, |
| 326 | gpointer opaque, |
| 327 | GDestroyNotify destroy) |
| 328 | { |
| 329 | QIOTask *task = qio_task_new( |
| 330 | OBJECT(ioc), callback, opaque, destroy); |
| 331 | struct QIOChannelSocketDGramWorkerData *data = g_new0( |
| 332 | struct QIOChannelSocketDGramWorkerData, 1); |
| 333 | |
| 334 | qapi_copy_SocketAddress(&data->localAddr, localAddr); |
| 335 | qapi_copy_SocketAddress(&data->remoteAddr, remoteAddr); |
| 336 | |
| 337 | trace_qio_channel_socket_dgram_async(ioc, localAddr, remoteAddr); |
| 338 | qio_task_run_in_thread(task, |
| 339 | qio_channel_socket_dgram_worker, |
| 340 | data, |
| 341 | qio_channel_socket_dgram_worker_free); |
| 342 | } |
| 343 | |
| 344 | |
| 345 | QIOChannelSocket * |
| 346 | qio_channel_socket_accept(QIOChannelSocket *ioc, |
| 347 | Error **errp) |
| 348 | { |
| 349 | QIOChannelSocket *cioc; |
| 350 | |
| 351 | cioc = QIO_CHANNEL_SOCKET(object_new(TYPE_QIO_CHANNEL_SOCKET)); |
| 352 | cioc->fd = -1; |
| 353 | cioc->remoteAddrLen = sizeof(ioc->remoteAddr); |
| 354 | cioc->localAddrLen = sizeof(ioc->localAddr); |
| 355 | |
Paolo Bonzini | a589720 | 2016-03-07 12:12:36 +0100 | [diff] [blame] | 356 | #ifdef WIN32 |
| 357 | QIO_CHANNEL(cioc)->event = CreateEvent(NULL, FALSE, FALSE, NULL); |
| 358 | #endif |
| 359 | |
| 360 | |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 361 | retry: |
| 362 | trace_qio_channel_socket_accept(ioc); |
Daniel P. Berrange | de7971f | 2016-03-10 17:07:27 +0000 | [diff] [blame] | 363 | cioc->fd = qemu_accept(ioc->fd, (struct sockaddr *)&cioc->remoteAddr, |
| 364 | &cioc->remoteAddrLen); |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 365 | if (cioc->fd < 0) { |
| 366 | trace_qio_channel_socket_accept_fail(ioc); |
Daniel P. Berrange | b16a44e | 2016-03-07 20:36:03 +0000 | [diff] [blame] | 367 | if (errno == EINTR) { |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 368 | goto retry; |
| 369 | } |
| 370 | goto error; |
| 371 | } |
| 372 | |
Daniel P. Berrange | bead599 | 2015-12-21 12:04:21 +0000 | [diff] [blame] | 373 | if (getsockname(cioc->fd, (struct sockaddr *)&cioc->localAddr, |
| 374 | &cioc->localAddrLen) < 0) { |
Daniel P. Berrange | b16a44e | 2016-03-07 20:36:03 +0000 | [diff] [blame] | 375 | error_setg_errno(errp, errno, |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 376 | "Unable to query local socket address"); |
| 377 | goto error; |
| 378 | } |
| 379 | |
Daniel P. Berrange | bead599 | 2015-12-21 12:04:21 +0000 | [diff] [blame] | 380 | #ifndef WIN32 |
| 381 | if (cioc->localAddr.ss_family == AF_UNIX) { |
| 382 | QIO_CHANNEL(cioc)->features |= (1 << QIO_CHANNEL_FEATURE_FD_PASS); |
| 383 | } |
| 384 | #endif /* WIN32 */ |
| 385 | |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 386 | trace_qio_channel_socket_accept_complete(ioc, cioc, cioc->fd); |
| 387 | return cioc; |
| 388 | |
| 389 | error: |
| 390 | object_unref(OBJECT(cioc)); |
| 391 | return NULL; |
| 392 | } |
| 393 | |
| 394 | static void qio_channel_socket_init(Object *obj) |
| 395 | { |
| 396 | QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(obj); |
| 397 | ioc->fd = -1; |
| 398 | } |
| 399 | |
| 400 | static void qio_channel_socket_finalize(Object *obj) |
| 401 | { |
| 402 | QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(obj); |
Marc-André Lureau | 74b6ce4 | 2016-06-16 21:28:52 +0200 | [diff] [blame] | 403 | |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 404 | if (ioc->fd != -1) { |
Marc-André Lureau | 74b6ce4 | 2016-06-16 21:28:52 +0200 | [diff] [blame] | 405 | if (QIO_CHANNEL(ioc)->features & QIO_CHANNEL_FEATURE_LISTEN) { |
| 406 | Error *err = NULL; |
| 407 | |
| 408 | socket_listen_cleanup(ioc->fd, &err); |
| 409 | if (err) { |
| 410 | error_report_err(err); |
| 411 | err = NULL; |
| 412 | } |
| 413 | } |
Paolo Bonzini | a589720 | 2016-03-07 12:12:36 +0100 | [diff] [blame] | 414 | #ifdef WIN32 |
| 415 | WSAEventSelect(ioc->fd, NULL, 0); |
| 416 | #endif |
| 417 | closesocket(ioc->fd); |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 418 | ioc->fd = -1; |
| 419 | } |
| 420 | } |
| 421 | |
| 422 | |
| 423 | #ifndef WIN32 |
| 424 | static void qio_channel_socket_copy_fds(struct msghdr *msg, |
| 425 | int **fds, size_t *nfds) |
| 426 | { |
| 427 | struct cmsghdr *cmsg; |
| 428 | |
| 429 | *nfds = 0; |
| 430 | *fds = NULL; |
| 431 | |
| 432 | for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) { |
| 433 | int fd_size, i; |
| 434 | int gotfds; |
| 435 | |
| 436 | if (cmsg->cmsg_len < CMSG_LEN(sizeof(int)) || |
| 437 | cmsg->cmsg_level != SOL_SOCKET || |
| 438 | cmsg->cmsg_type != SCM_RIGHTS) { |
| 439 | continue; |
| 440 | } |
| 441 | |
| 442 | fd_size = cmsg->cmsg_len - CMSG_LEN(0); |
| 443 | |
| 444 | if (!fd_size) { |
| 445 | continue; |
| 446 | } |
| 447 | |
| 448 | gotfds = fd_size / sizeof(int); |
| 449 | *fds = g_renew(int, *fds, *nfds + gotfds); |
| 450 | memcpy(*fds + *nfds, CMSG_DATA(cmsg), fd_size); |
| 451 | |
| 452 | for (i = 0; i < gotfds; i++) { |
| 453 | int fd = (*fds)[*nfds + i]; |
| 454 | if (fd < 0) { |
| 455 | continue; |
| 456 | } |
| 457 | |
| 458 | /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */ |
| 459 | qemu_set_block(fd); |
| 460 | |
| 461 | #ifndef MSG_CMSG_CLOEXEC |
| 462 | qemu_set_cloexec(fd); |
| 463 | #endif |
| 464 | } |
| 465 | *nfds += gotfds; |
| 466 | } |
| 467 | } |
| 468 | |
| 469 | |
| 470 | static ssize_t qio_channel_socket_readv(QIOChannel *ioc, |
| 471 | const struct iovec *iov, |
| 472 | size_t niov, |
| 473 | int **fds, |
| 474 | size_t *nfds, |
| 475 | Error **errp) |
| 476 | { |
| 477 | QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); |
| 478 | ssize_t ret; |
| 479 | struct msghdr msg = { NULL, }; |
| 480 | char control[CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS)]; |
| 481 | int sflags = 0; |
| 482 | |
Daniel P. Berrange | ccf1e2d | 2016-01-18 10:37:21 +0000 | [diff] [blame] | 483 | memset(control, 0, CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS)); |
| 484 | |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 485 | #ifdef MSG_CMSG_CLOEXEC |
| 486 | sflags |= MSG_CMSG_CLOEXEC; |
| 487 | #endif |
| 488 | |
| 489 | msg.msg_iov = (struct iovec *)iov; |
| 490 | msg.msg_iovlen = niov; |
| 491 | if (fds && nfds) { |
| 492 | msg.msg_control = control; |
| 493 | msg.msg_controllen = sizeof(control); |
| 494 | } |
| 495 | |
| 496 | retry: |
| 497 | ret = recvmsg(sioc->fd, &msg, sflags); |
| 498 | if (ret < 0) { |
Daniel P. Berrange | b16a44e | 2016-03-07 20:36:03 +0000 | [diff] [blame] | 499 | if (errno == EAGAIN) { |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 500 | return QIO_CHANNEL_ERR_BLOCK; |
| 501 | } |
Daniel P. Berrange | b16a44e | 2016-03-07 20:36:03 +0000 | [diff] [blame] | 502 | if (errno == EINTR) { |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 503 | goto retry; |
| 504 | } |
| 505 | |
Daniel P. Berrange | b16a44e | 2016-03-07 20:36:03 +0000 | [diff] [blame] | 506 | error_setg_errno(errp, errno, |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 507 | "Unable to read from socket"); |
| 508 | return -1; |
| 509 | } |
| 510 | |
| 511 | if (fds && nfds) { |
| 512 | qio_channel_socket_copy_fds(&msg, fds, nfds); |
| 513 | } |
| 514 | |
| 515 | return ret; |
| 516 | } |
| 517 | |
| 518 | static ssize_t qio_channel_socket_writev(QIOChannel *ioc, |
| 519 | const struct iovec *iov, |
| 520 | size_t niov, |
| 521 | int *fds, |
| 522 | size_t nfds, |
| 523 | Error **errp) |
| 524 | { |
| 525 | QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); |
| 526 | ssize_t ret; |
| 527 | struct msghdr msg = { NULL, }; |
Daniel P. Berrange | ccf1e2d | 2016-01-18 10:37:21 +0000 | [diff] [blame] | 528 | char control[CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS)]; |
Daniel P. Berrange | 7b3c618 | 2015-12-21 11:58:51 +0000 | [diff] [blame] | 529 | size_t fdsize = sizeof(int) * nfds; |
| 530 | struct cmsghdr *cmsg; |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 531 | |
Daniel P. Berrange | ccf1e2d | 2016-01-18 10:37:21 +0000 | [diff] [blame] | 532 | memset(control, 0, CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS)); |
| 533 | |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 534 | msg.msg_iov = (struct iovec *)iov; |
| 535 | msg.msg_iovlen = niov; |
| 536 | |
| 537 | if (nfds) { |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 538 | if (nfds > SOCKET_MAX_FDS) { |
Daniel P. Berrange | cc75a50 | 2016-01-11 12:59:44 +0000 | [diff] [blame] | 539 | error_setg_errno(errp, EINVAL, |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 540 | "Only %d FDs can be sent, got %zu", |
| 541 | SOCKET_MAX_FDS, nfds); |
| 542 | return -1; |
| 543 | } |
| 544 | |
| 545 | msg.msg_control = control; |
| 546 | msg.msg_controllen = CMSG_SPACE(sizeof(int) * nfds); |
| 547 | |
| 548 | cmsg = CMSG_FIRSTHDR(&msg); |
| 549 | cmsg->cmsg_len = CMSG_LEN(fdsize); |
| 550 | cmsg->cmsg_level = SOL_SOCKET; |
| 551 | cmsg->cmsg_type = SCM_RIGHTS; |
| 552 | memcpy(CMSG_DATA(cmsg), fds, fdsize); |
| 553 | } |
| 554 | |
| 555 | retry: |
| 556 | ret = sendmsg(sioc->fd, &msg, 0); |
| 557 | if (ret <= 0) { |
Daniel P. Berrange | b16a44e | 2016-03-07 20:36:03 +0000 | [diff] [blame] | 558 | if (errno == EAGAIN) { |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 559 | return QIO_CHANNEL_ERR_BLOCK; |
| 560 | } |
Daniel P. Berrange | b16a44e | 2016-03-07 20:36:03 +0000 | [diff] [blame] | 561 | if (errno == EINTR) { |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 562 | goto retry; |
| 563 | } |
Daniel P. Berrange | b16a44e | 2016-03-07 20:36:03 +0000 | [diff] [blame] | 564 | error_setg_errno(errp, errno, |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 565 | "Unable to write to socket"); |
| 566 | return -1; |
| 567 | } |
| 568 | return ret; |
| 569 | } |
| 570 | #else /* WIN32 */ |
| 571 | static ssize_t qio_channel_socket_readv(QIOChannel *ioc, |
| 572 | const struct iovec *iov, |
| 573 | size_t niov, |
| 574 | int **fds, |
| 575 | size_t *nfds, |
| 576 | Error **errp) |
| 577 | { |
| 578 | QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); |
| 579 | ssize_t done = 0; |
| 580 | ssize_t i; |
| 581 | |
| 582 | for (i = 0; i < niov; i++) { |
| 583 | ssize_t ret; |
| 584 | retry: |
| 585 | ret = recv(sioc->fd, |
| 586 | iov[i].iov_base, |
| 587 | iov[i].iov_len, |
| 588 | 0); |
| 589 | if (ret < 0) { |
Daniel P. Berrange | b16a44e | 2016-03-07 20:36:03 +0000 | [diff] [blame] | 590 | if (errno == EAGAIN) { |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 591 | if (done) { |
| 592 | return done; |
| 593 | } else { |
| 594 | return QIO_CHANNEL_ERR_BLOCK; |
| 595 | } |
Daniel P. Berrange | b16a44e | 2016-03-07 20:36:03 +0000 | [diff] [blame] | 596 | } else if (errno == EINTR) { |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 597 | goto retry; |
| 598 | } else { |
Daniel P. Berrange | b16a44e | 2016-03-07 20:36:03 +0000 | [diff] [blame] | 599 | error_setg_errno(errp, errno, |
Daniel P. Berrange | 5151d23 | 2016-03-08 12:06:30 +0000 | [diff] [blame] | 600 | "Unable to read from socket"); |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 601 | return -1; |
| 602 | } |
| 603 | } |
| 604 | done += ret; |
| 605 | if (ret < iov[i].iov_len) { |
| 606 | return done; |
| 607 | } |
| 608 | } |
| 609 | |
| 610 | return done; |
| 611 | } |
| 612 | |
| 613 | static ssize_t qio_channel_socket_writev(QIOChannel *ioc, |
| 614 | const struct iovec *iov, |
| 615 | size_t niov, |
| 616 | int *fds, |
| 617 | size_t nfds, |
| 618 | Error **errp) |
| 619 | { |
| 620 | QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); |
| 621 | ssize_t done = 0; |
| 622 | ssize_t i; |
| 623 | |
| 624 | for (i = 0; i < niov; i++) { |
| 625 | ssize_t ret; |
| 626 | retry: |
| 627 | ret = send(sioc->fd, |
| 628 | iov[i].iov_base, |
| 629 | iov[i].iov_len, |
| 630 | 0); |
| 631 | if (ret < 0) { |
Daniel P. Berrange | b16a44e | 2016-03-07 20:36:03 +0000 | [diff] [blame] | 632 | if (errno == EAGAIN) { |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 633 | if (done) { |
| 634 | return done; |
| 635 | } else { |
| 636 | return QIO_CHANNEL_ERR_BLOCK; |
| 637 | } |
Daniel P. Berrange | b16a44e | 2016-03-07 20:36:03 +0000 | [diff] [blame] | 638 | } else if (errno == EINTR) { |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 639 | goto retry; |
| 640 | } else { |
Daniel P. Berrange | b16a44e | 2016-03-07 20:36:03 +0000 | [diff] [blame] | 641 | error_setg_errno(errp, errno, |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 642 | "Unable to write to socket"); |
| 643 | return -1; |
| 644 | } |
| 645 | } |
| 646 | done += ret; |
| 647 | if (ret < iov[i].iov_len) { |
| 648 | return done; |
| 649 | } |
| 650 | } |
| 651 | |
| 652 | return done; |
| 653 | } |
| 654 | #endif /* WIN32 */ |
| 655 | |
| 656 | static int |
| 657 | qio_channel_socket_set_blocking(QIOChannel *ioc, |
| 658 | bool enabled, |
| 659 | Error **errp) |
| 660 | { |
| 661 | QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); |
| 662 | |
| 663 | if (enabled) { |
| 664 | qemu_set_block(sioc->fd); |
| 665 | } else { |
| 666 | qemu_set_nonblock(sioc->fd); |
Paolo Bonzini | a589720 | 2016-03-07 12:12:36 +0100 | [diff] [blame] | 667 | #ifdef WIN32 |
| 668 | WSAEventSelect(sioc->fd, ioc->event, |
| 669 | FD_READ | FD_ACCEPT | FD_CLOSE | |
| 670 | FD_CONNECT | FD_WRITE | FD_OOB); |
| 671 | #endif |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 672 | } |
| 673 | return 0; |
| 674 | } |
| 675 | |
| 676 | |
| 677 | static void |
| 678 | qio_channel_socket_set_delay(QIOChannel *ioc, |
| 679 | bool enabled) |
| 680 | { |
| 681 | QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); |
| 682 | int v = enabled ? 0 : 1; |
| 683 | |
| 684 | qemu_setsockopt(sioc->fd, |
| 685 | IPPROTO_TCP, TCP_NODELAY, |
| 686 | &v, sizeof(v)); |
| 687 | } |
| 688 | |
| 689 | |
| 690 | static void |
| 691 | qio_channel_socket_set_cork(QIOChannel *ioc, |
| 692 | bool enabled) |
| 693 | { |
| 694 | QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); |
| 695 | int v = enabled ? 1 : 0; |
| 696 | |
| 697 | socket_set_cork(sioc->fd, v); |
| 698 | } |
| 699 | |
| 700 | |
| 701 | static int |
| 702 | qio_channel_socket_close(QIOChannel *ioc, |
| 703 | Error **errp) |
| 704 | { |
| 705 | QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); |
| 706 | |
Paolo Bonzini | a589720 | 2016-03-07 12:12:36 +0100 | [diff] [blame] | 707 | if (sioc->fd != -1) { |
| 708 | #ifdef WIN32 |
| 709 | WSAEventSelect(sioc->fd, NULL, 0); |
| 710 | #endif |
| 711 | if (closesocket(sioc->fd) < 0) { |
| 712 | sioc->fd = -1; |
Daniel P. Berrange | b16a44e | 2016-03-07 20:36:03 +0000 | [diff] [blame] | 713 | error_setg_errno(errp, errno, |
Paolo Bonzini | a589720 | 2016-03-07 12:12:36 +0100 | [diff] [blame] | 714 | "Unable to close socket"); |
| 715 | return -1; |
| 716 | } |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 717 | sioc->fd = -1; |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 718 | } |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 719 | return 0; |
| 720 | } |
| 721 | |
| 722 | static int |
| 723 | qio_channel_socket_shutdown(QIOChannel *ioc, |
| 724 | QIOChannelShutdown how, |
| 725 | Error **errp) |
| 726 | { |
| 727 | QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); |
| 728 | int sockhow; |
| 729 | |
| 730 | switch (how) { |
| 731 | case QIO_CHANNEL_SHUTDOWN_READ: |
| 732 | sockhow = SHUT_RD; |
| 733 | break; |
| 734 | case QIO_CHANNEL_SHUTDOWN_WRITE: |
| 735 | sockhow = SHUT_WR; |
| 736 | break; |
| 737 | case QIO_CHANNEL_SHUTDOWN_BOTH: |
| 738 | default: |
| 739 | sockhow = SHUT_RDWR; |
| 740 | break; |
| 741 | } |
| 742 | |
| 743 | if (shutdown(sioc->fd, sockhow) < 0) { |
Daniel P. Berrange | b16a44e | 2016-03-07 20:36:03 +0000 | [diff] [blame] | 744 | error_setg_errno(errp, errno, |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 745 | "Unable to shutdown socket"); |
| 746 | return -1; |
| 747 | } |
| 748 | return 0; |
| 749 | } |
| 750 | |
| 751 | static GSource *qio_channel_socket_create_watch(QIOChannel *ioc, |
| 752 | GIOCondition condition) |
| 753 | { |
| 754 | QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc); |
Paolo Bonzini | b83b68a | 2016-03-07 11:16:39 +0100 | [diff] [blame] | 755 | return qio_channel_create_socket_watch(ioc, |
| 756 | sioc->fd, |
| 757 | condition); |
Daniel P. Berrange | 559607e | 2015-02-27 16:19:33 +0000 | [diff] [blame] | 758 | } |
| 759 | |
| 760 | static void qio_channel_socket_class_init(ObjectClass *klass, |
| 761 | void *class_data G_GNUC_UNUSED) |
| 762 | { |
| 763 | QIOChannelClass *ioc_klass = QIO_CHANNEL_CLASS(klass); |
| 764 | |
| 765 | ioc_klass->io_writev = qio_channel_socket_writev; |
| 766 | ioc_klass->io_readv = qio_channel_socket_readv; |
| 767 | ioc_klass->io_set_blocking = qio_channel_socket_set_blocking; |
| 768 | ioc_klass->io_close = qio_channel_socket_close; |
| 769 | ioc_klass->io_shutdown = qio_channel_socket_shutdown; |
| 770 | ioc_klass->io_set_cork = qio_channel_socket_set_cork; |
| 771 | ioc_klass->io_set_delay = qio_channel_socket_set_delay; |
| 772 | ioc_klass->io_create_watch = qio_channel_socket_create_watch; |
| 773 | } |
| 774 | |
| 775 | static const TypeInfo qio_channel_socket_info = { |
| 776 | .parent = TYPE_QIO_CHANNEL, |
| 777 | .name = TYPE_QIO_CHANNEL_SOCKET, |
| 778 | .instance_size = sizeof(QIOChannelSocket), |
| 779 | .instance_init = qio_channel_socket_init, |
| 780 | .instance_finalize = qio_channel_socket_finalize, |
| 781 | .class_init = qio_channel_socket_class_init, |
| 782 | }; |
| 783 | |
| 784 | static void qio_channel_socket_register_types(void) |
| 785 | { |
| 786 | type_register_static(&qio_channel_socket_info); |
| 787 | } |
| 788 | |
| 789 | type_init(qio_channel_socket_register_types); |