io/channel-socket.c

   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 2.1 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 #include "qemu/osdep.h"
  21 #include "qemu-common.h"
  22 #include "qapi/error.h"
  23 #include "qapi/qapi-visit-sockets.h"
  24 #include "qemu/module.h"
  25 #include "io/channel-socket.h"
  26 #include "io/channel-watch.h"
  27 #include "trace.h"
  28 #include "qapi/clone-visitor.h"
  29
  30 #define SOCKET_MAX_FDS 16
  31
  32 SocketAddress *
  33 qio_channel_socket_get_local_address(QIOChannelSocket *ioc,
  34                                      Error **errp)
  35 {
  36     return socket_sockaddr_to_address(&ioc->localAddr,
  37                                       ioc->localAddrLen,
  38                                       errp);
  39 }
  40
  41 SocketAddress *
  42 qio_channel_socket_get_remote_address(QIOChannelSocket *ioc,
  43                                       Error **errp)
  44 {
  45     return socket_sockaddr_to_address(&ioc->remoteAddr,
  46                                       ioc->remoteAddrLen,
  47                                       errp);
  48 }
  49
  50 QIOChannelSocket *
  51 qio_channel_socket_new(void)
  52 {
  53     QIOChannelSocket *sioc;
  54     QIOChannel *ioc;
  55
  56     sioc = QIO_CHANNEL_SOCKET(object_new(TYPE_QIO_CHANNEL_SOCKET));
  57     sioc->fd = -1;
  58
  59     ioc = QIO_CHANNEL(sioc);
  60     qio_channel_set_feature(ioc, QIO_CHANNEL_FEATURE_SHUTDOWN);
  61
  62 #ifdef WIN32
  63     ioc->event = CreateEvent(NULL, FALSE, FALSE, NULL);
  64 #endif
  65
  66     trace_qio_channel_socket_new(sioc);
  67
  68     return sioc;
  69 }
  70
  71
  72 static int
  73 qio_channel_socket_set_fd(QIOChannelSocket *sioc,
  74                           int fd,
  75                           Error **errp)
  76 {
  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) {
  89         if (errno == ENOTCONN) {
  90             memset(&sioc->remoteAddr, 0, sizeof(sioc->remoteAddr));
  91             sioc->remoteAddrLen = sizeof(sioc->remoteAddr);
  92         } else {
  93             error_setg_errno(errp, errno,
  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) {
 101         error_setg_errno(errp, errno,
 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         qio_channel_set_feature(ioc, QIO_CHANNEL_FEATURE_FD_PASS);
 110     }
 111 #endif /* WIN32 */
 112
 113     return 0;
 114
 115  error:
 116     sioc->fd = -1; /* Let the caller close FD on failure */
 117     return -1;
 118 }
 119
 120 QIOChannelSocket *
 121 qio_channel_socket_new_fd(int fd,
 122                           Error **errp)
 123 {
 124     QIOChannelSocket *ioc;
 125
 126     ioc = qio_channel_socket_new();
 127     if (qio_channel_socket_set_fd(ioc, fd, errp) < 0) {
 128         object_unref(OBJECT(ioc));
 129         return NULL;
 130     }
 131
 132     trace_qio_channel_socket_new_fd(ioc, fd);
 133
 134     return ioc;
 135 }
 136
 137
 138 int qio_channel_socket_connect_sync(QIOChannelSocket *ioc,
 139                                     SocketAddress *addr,
 140                                     Error **errp)
 141 {
 142     int fd;
 143
 144     trace_qio_channel_socket_connect_sync(ioc, addr);
 145     fd = socket_connect(addr, errp);
 146     if (fd < 0) {
 147         trace_qio_channel_socket_connect_fail(ioc);
 148         return -1;
 149     }
 150
 151     trace_qio_channel_socket_connect_complete(ioc, fd);
 152     if (qio_channel_socket_set_fd(ioc, fd, errp) < 0) {
 153         close(fd);
 154         return -1;
 155     }
 156
 157     return 0;
 158 }
 159
 160
 161 static void qio_channel_socket_connect_worker(QIOTask *task,
 162                                               gpointer opaque)
 163 {
 164     QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task));
 165     SocketAddress *addr = opaque;
 166     Error *err = NULL;
 167
 168     qio_channel_socket_connect_sync(ioc, addr, &err);
 169
 170     qio_task_set_error(task, err);
 171 }
 172
 173
 174 void qio_channel_socket_connect_async(QIOChannelSocket *ioc,
 175                                       SocketAddress *addr,
 176                                       QIOTaskFunc callback,
 177                                       gpointer opaque,
 178                                       GDestroyNotify destroy,
 179                                       GMainContext *context)
 180 {
 181     QIOTask *task = qio_task_new(
 182         OBJECT(ioc), callback, opaque, destroy);
 183     SocketAddress *addrCopy;
 184
 185     addrCopy = QAPI_CLONE(SocketAddress, addr);
 186
 187     /* socket_connect() does a non-blocking connect(), but it
 188      * still blocks in DNS lookups, so we must use a thread */
 189     trace_qio_channel_socket_connect_async(ioc, addr);
 190     qio_task_run_in_thread(task,
 191                            qio_channel_socket_connect_worker,
 192                            addrCopy,
 193                            (GDestroyNotify)qapi_free_SocketAddress,
 194                            context);
 195 }
 196
 197
 198 int qio_channel_socket_listen_sync(QIOChannelSocket *ioc,
 199                                    SocketAddress *addr,
 200                                    int num,
 201                                    Error **errp)
 202 {
 203     int fd;
 204
 205     trace_qio_channel_socket_listen_sync(ioc, addr, num);
 206     fd = socket_listen(addr, num, errp);
 207     if (fd < 0) {
 208         trace_qio_channel_socket_listen_fail(ioc);
 209         return -1;
 210     }
 211
 212     trace_qio_channel_socket_listen_complete(ioc, fd);
 213     if (qio_channel_socket_set_fd(ioc, fd, errp) < 0) {
 214         close(fd);
 215         return -1;
 216     }
 217     qio_channel_set_feature(QIO_CHANNEL(ioc), QIO_CHANNEL_FEATURE_LISTEN);
 218
 219     return 0;
 220 }
 221
 222
 223 struct QIOChannelListenWorkerData {
 224     SocketAddress *addr;
 225     int num; /* amount of expected connections */
 226 };
 227
 228 static void qio_channel_listen_worker_free(gpointer opaque)
 229 {
 230     struct QIOChannelListenWorkerData *data = opaque;
 231
 232     qapi_free_SocketAddress(data->addr);
 233     g_free(data);
 234 }
 235
 236 static void qio_channel_socket_listen_worker(QIOTask *task,
 237                                              gpointer opaque)
 238 {
 239     QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task));
 240     struct QIOChannelListenWorkerData *data = opaque;
 241     Error *err = NULL;
 242
 243     qio_channel_socket_listen_sync(ioc, data->addr, data->num, &err);
 244
 245     qio_task_set_error(task, err);
 246 }
 247
 248
 249 void qio_channel_socket_listen_async(QIOChannelSocket *ioc,
 250                                      SocketAddress *addr,
 251                                      int num,
 252                                      QIOTaskFunc callback,
 253                                      gpointer opaque,
 254                                      GDestroyNotify destroy,
 255                                      GMainContext *context)
 256 {
 257     QIOTask *task = qio_task_new(
 258         OBJECT(ioc), callback, opaque, destroy);
 259     struct QIOChannelListenWorkerData *data;
 260
 261     data = g_new0(struct QIOChannelListenWorkerData, 1);
 262     data->addr = QAPI_CLONE(SocketAddress, addr);
 263     data->num = num;
 264
 265     /* socket_listen() blocks in DNS lookups, so we must use a thread */
 266     trace_qio_channel_socket_listen_async(ioc, addr, num);
 267     qio_task_run_in_thread(task,
 268                            qio_channel_socket_listen_worker,
 269                            data,
 270                            qio_channel_listen_worker_free,
 271                            context);
 272 }
 273
 274
 275 int qio_channel_socket_dgram_sync(QIOChannelSocket *ioc,
 276                                   SocketAddress *localAddr,
 277                                   SocketAddress *remoteAddr,
 278                                   Error **errp)
 279 {
 280     int fd;
 281
 282     trace_qio_channel_socket_dgram_sync(ioc, localAddr, remoteAddr);
 283     fd = socket_dgram(remoteAddr, localAddr, errp);
 284     if (fd < 0) {
 285         trace_qio_channel_socket_dgram_fail(ioc);
 286         return -1;
 287     }
 288
 289     trace_qio_channel_socket_dgram_complete(ioc, fd);
 290     if (qio_channel_socket_set_fd(ioc, fd, errp) < 0) {
 291         close(fd);
 292         return -1;
 293     }
 294
 295     return 0;
 296 }
 297
 298
 299 struct QIOChannelSocketDGramWorkerData {
 300     SocketAddress *localAddr;
 301     SocketAddress *remoteAddr;
 302 };
 303
 304
 305 static void qio_channel_socket_dgram_worker_free(gpointer opaque)
 306 {
 307     struct QIOChannelSocketDGramWorkerData *data = opaque;
 308     qapi_free_SocketAddress(data->localAddr);
 309     qapi_free_SocketAddress(data->remoteAddr);
 310     g_free(data);
 311 }
 312
 313 static void qio_channel_socket_dgram_worker(QIOTask *task,
 314                                             gpointer opaque)
 315 {
 316     QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(qio_task_get_source(task));
 317     struct QIOChannelSocketDGramWorkerData *data = opaque;
 318     Error *err = NULL;
 319
 320     /* socket_dgram() blocks in DNS lookups, so we must use a thread */
 321     qio_channel_socket_dgram_sync(ioc, data->localAddr,
 322                                   data->remoteAddr, &err);
 323
 324     qio_task_set_error(task, err);
 325 }
 326
 327
 328 void qio_channel_socket_dgram_async(QIOChannelSocket *ioc,
 329                                     SocketAddress *localAddr,
 330                                     SocketAddress *remoteAddr,
 331                                     QIOTaskFunc callback,
 332                                     gpointer opaque,
 333                                     GDestroyNotify destroy,
 334                                     GMainContext *context)
 335 {
 336     QIOTask *task = qio_task_new(
 337         OBJECT(ioc), callback, opaque, destroy);
 338     struct QIOChannelSocketDGramWorkerData *data = g_new0(
 339         struct QIOChannelSocketDGramWorkerData, 1);
 340
 341     data->localAddr = QAPI_CLONE(SocketAddress, localAddr);
 342     data->remoteAddr = QAPI_CLONE(SocketAddress, remoteAddr);
 343
 344     trace_qio_channel_socket_dgram_async(ioc, localAddr, remoteAddr);
 345     qio_task_run_in_thread(task,
 346                            qio_channel_socket_dgram_worker,
 347                            data,
 348                            qio_channel_socket_dgram_worker_free,
 349                            context);
 350 }
 351
 352
 353 QIOChannelSocket *
 354 qio_channel_socket_accept(QIOChannelSocket *ioc,
 355                           Error **errp)
 356 {
 357     QIOChannelSocket *cioc;
 358
 359     cioc = qio_channel_socket_new();
 360     cioc->remoteAddrLen = sizeof(ioc->remoteAddr);
 361     cioc->localAddrLen = sizeof(ioc->localAddr);
 362
 363  retry:
 364     trace_qio_channel_socket_accept(ioc);
 365     cioc->fd = qemu_accept(ioc->fd, (struct sockaddr *)&cioc->remoteAddr,
 366                            &cioc->remoteAddrLen);
 367     if (cioc->fd < 0) {
 368         if (errno == EINTR) {
 369             goto retry;
 370         }
 371         error_setg_errno(errp, errno, "Unable to accept connection");
 372         trace_qio_channel_socket_accept_fail(ioc);
 373         goto error;
 374     }
 375
 376     if (getsockname(cioc->fd, (struct sockaddr *)&cioc->localAddr,
 377                     &cioc->localAddrLen) < 0) {
 378         error_setg_errno(errp, errno,
 379                          "Unable to query local socket address");
 380         goto error;
 381     }
 382
 383 #ifndef WIN32
 384     if (cioc->localAddr.ss_family == AF_UNIX) {
 385         QIOChannel *ioc_local = QIO_CHANNEL(cioc);
 386         qio_channel_set_feature(ioc_local, QIO_CHANNEL_FEATURE_FD_PASS);
 387     }
 388 #endif /* WIN32 */
 389
 390     trace_qio_channel_socket_accept_complete(ioc, cioc, cioc->fd);
 391     return cioc;
 392
 393  error:
 394     object_unref(OBJECT(cioc));
 395     return NULL;
 396 }
 397
 398 static void qio_channel_socket_init(Object *obj)
 399 {
 400     QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(obj);
 401     ioc->fd = -1;
 402 }
 403
 404 static void qio_channel_socket_finalize(Object *obj)
 405 {
 406     QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(obj);
 407
 408     if (ioc->fd != -1) {
 409         QIOChannel *ioc_local = QIO_CHANNEL(ioc);
 410         if (qio_channel_has_feature(ioc_local, QIO_CHANNEL_FEATURE_LISTEN)) {
 411             Error *err = NULL;
 412
 413             socket_listen_cleanup(ioc->fd, &err);
 414             if (err) {
 415                 error_report_err(err);
 416                 err = NULL;
 417             }
 418         }
 419 #ifdef WIN32
 420         WSAEventSelect(ioc->fd, NULL, 0);
 421 #endif
 422         closesocket(ioc->fd);
 423         ioc->fd = -1;
 424     }
 425 }
 426
 427
 428 #ifndef WIN32
 429 static void qio_channel_socket_copy_fds(struct msghdr *msg,
 430                                         int **fds, size_t *nfds)
 431 {
 432     struct cmsghdr *cmsg;
 433
 434     *nfds = 0;
 435     *fds = NULL;
 436
 437     for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
 438         int fd_size, i;
 439         int gotfds;
 440
 441         if (cmsg->cmsg_len < CMSG_LEN(sizeof(int)) ||
 442             cmsg->cmsg_level != SOL_SOCKET ||
 443             cmsg->cmsg_type != SCM_RIGHTS) {
 444             continue;
 445         }
 446
 447         fd_size = cmsg->cmsg_len - CMSG_LEN(0);
 448
 449         if (!fd_size) {
 450             continue;
 451         }
 452
 453         gotfds = fd_size / sizeof(int);
 454         *fds = g_renew(int, *fds, *nfds + gotfds);
 455         memcpy(*fds + *nfds, CMSG_DATA(cmsg), fd_size);
 456
 457         for (i = 0; i < gotfds; i++) {
 458             int fd = (*fds)[*nfds + i];
 459             if (fd < 0) {
 460                 continue;
 461             }
 462
 463             /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
 464             qemu_set_block(fd);
 465
 466 #ifndef MSG_CMSG_CLOEXEC
 467             qemu_set_cloexec(fd);
 468 #endif
 469         }
 470         *nfds += gotfds;
 471     }
 472 }
 473
 474
 475 static ssize_t qio_channel_socket_readv(QIOChannel *ioc,
 476                                         const struct iovec *iov,
 477                                         size_t niov,
 478                                         int **fds,
 479                                         size_t *nfds,
 480                                         Error **errp)
 481 {
 482     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 483     ssize_t ret;
 484     struct msghdr msg = { NULL, };
 485     char control[CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS)];
 486     int sflags = 0;
 487
 488     memset(control, 0, CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS));
 489
 490     msg.msg_iov = (struct iovec *)iov;
 491     msg.msg_iovlen = niov;
 492     if (fds && nfds) {
 493         msg.msg_control = control;
 494         msg.msg_controllen = sizeof(control);
 495 #ifdef MSG_CMSG_CLOEXEC
 496         sflags |= MSG_CMSG_CLOEXEC;
 497 #endif
 498
 499     }
 500
 501  retry:
 502     ret = recvmsg(sioc->fd, &msg, sflags);
 503     if (ret < 0) {
 504         if (errno == EAGAIN) {
 505             return QIO_CHANNEL_ERR_BLOCK;
 506         }
 507         if (errno == EINTR) {
 508             goto retry;
 509         }
 510
 511         error_setg_errno(errp, errno,
 512                          "Unable to read from socket");
 513         return -1;
 514     }
 515
 516     if (fds && nfds) {
 517         qio_channel_socket_copy_fds(&msg, fds, nfds);
 518     }
 519
 520     return ret;
 521 }
 522
 523 static ssize_t qio_channel_socket_writev(QIOChannel *ioc,
 524                                          const struct iovec *iov,
 525                                          size_t niov,
 526                                          int *fds,
 527                                          size_t nfds,
 528                                          Error **errp)
 529 {
 530     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 531     ssize_t ret;
 532     struct msghdr msg = { NULL, };
 533     char control[CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS)];
 534     size_t fdsize = sizeof(int) * nfds;
 535     struct cmsghdr *cmsg;
 536
 537     memset(control, 0, CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS));
 538
 539     msg.msg_iov = (struct iovec *)iov;
 540     msg.msg_iovlen = niov;
 541
 542     if (nfds) {
 543         if (nfds > SOCKET_MAX_FDS) {
 544             error_setg_errno(errp, EINVAL,
 545                              "Only %d FDs can be sent, got %zu",
 546                              SOCKET_MAX_FDS, nfds);
 547             return -1;
 548         }
 549
 550         msg.msg_control = control;
 551         msg.msg_controllen = CMSG_SPACE(sizeof(int) * nfds);
 552
 553         cmsg = CMSG_FIRSTHDR(&msg);
 554         cmsg->cmsg_len = CMSG_LEN(fdsize);
 555         cmsg->cmsg_level = SOL_SOCKET;
 556         cmsg->cmsg_type = SCM_RIGHTS;
 557         memcpy(CMSG_DATA(cmsg), fds, fdsize);
 558     }
 559
 560  retry:
 561     ret = sendmsg(sioc->fd, &msg, 0);
 562     if (ret <= 0) {
 563         if (errno == EAGAIN) {
 564             return QIO_CHANNEL_ERR_BLOCK;
 565         }
 566         if (errno == EINTR) {
 567             goto retry;
 568         }
 569         error_setg_errno(errp, errno,
 570                          "Unable to write to socket");
 571         return -1;
 572     }
 573     return ret;
 574 }
 575 #else /* WIN32 */
 576 static ssize_t qio_channel_socket_readv(QIOChannel *ioc,
 577                                         const struct iovec *iov,
 578                                         size_t niov,
 579                                         int **fds,
 580                                         size_t *nfds,
 581                                         Error **errp)
 582 {
 583     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 584     ssize_t done = 0;
 585     ssize_t i;
 586
 587     for (i = 0; i < niov; i++) {
 588         ssize_t ret;
 589     retry:
 590         ret = recv(sioc->fd,
 591                    iov[i].iov_base,
 592                    iov[i].iov_len,
 593                    0);
 594         if (ret < 0) {
 595             if (errno == EAGAIN) {
 596                 if (done) {
 597                     return done;
 598                 } else {
 599                     return QIO_CHANNEL_ERR_BLOCK;
 600                 }
 601             } else if (errno == EINTR) {
 602                 goto retry;
 603             } else {
 604                 error_setg_errno(errp, errno,
 605                                  "Unable to read from socket");
 606                 return -1;
 607             }
 608         }
 609         done += ret;
 610         if (ret < iov[i].iov_len) {
 611             return done;
 612         }
 613     }
 614
 615     return done;
 616 }
 617
 618 static ssize_t qio_channel_socket_writev(QIOChannel *ioc,
 619                                          const struct iovec *iov,
 620                                          size_t niov,
 621                                          int *fds,
 622                                          size_t nfds,
 623                                          Error **errp)
 624 {
 625     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 626     ssize_t done = 0;
 627     ssize_t i;
 628
 629     for (i = 0; i < niov; i++) {
 630         ssize_t ret;
 631     retry:
 632         ret = send(sioc->fd,
 633                    iov[i].iov_base,
 634                    iov[i].iov_len,
 635                    0);
 636         if (ret < 0) {
 637             if (errno == EAGAIN) {
 638                 if (done) {
 639                     return done;
 640                 } else {
 641                     return QIO_CHANNEL_ERR_BLOCK;
 642                 }
 643             } else if (errno == EINTR) {
 644                 goto retry;
 645             } else {
 646                 error_setg_errno(errp, errno,
 647                                  "Unable to write to socket");
 648                 return -1;
 649             }
 650         }
 651         done += ret;
 652         if (ret < iov[i].iov_len) {
 653             return done;
 654         }
 655     }
 656
 657     return done;
 658 }
 659 #endif /* WIN32 */
 660
 661 static int
 662 qio_channel_socket_set_blocking(QIOChannel *ioc,
 663                                 bool enabled,
 664                                 Error **errp)
 665 {
 666     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 667
 668     if (enabled) {
 669         qemu_set_block(sioc->fd);
 670     } else {
 671         qemu_set_nonblock(sioc->fd);
 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     int rc = 0;
 707     Error *err = NULL;
 708
 709     if (sioc->fd != -1) {
 710 #ifdef WIN32
 711         WSAEventSelect(sioc->fd, NULL, 0);
 712 #endif
 713         if (qio_channel_has_feature(ioc, QIO_CHANNEL_FEATURE_LISTEN)) {
 714             socket_listen_cleanup(sioc->fd, errp);
 715         }
 716
 717         if (closesocket(sioc->fd) < 0) {
 718             sioc->fd = -1;
 719             error_setg_errno(&err, errno, "Unable to close socket");
 720             error_propagate(errp, err);
 721             return -1;
 722         }
 723         sioc->fd = -1;
 724     }
 725     return rc;
 726 }
 727
 728 static int
 729 qio_channel_socket_shutdown(QIOChannel *ioc,
 730                             QIOChannelShutdown how,
 731                             Error **errp)
 732 {
 733     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 734     int sockhow;
 735
 736     switch (how) {
 737     case QIO_CHANNEL_SHUTDOWN_READ:
 738         sockhow = SHUT_RD;
 739         break;
 740     case QIO_CHANNEL_SHUTDOWN_WRITE:
 741         sockhow = SHUT_WR;
 742         break;
 743     case QIO_CHANNEL_SHUTDOWN_BOTH:
 744     default:
 745         sockhow = SHUT_RDWR;
 746         break;
 747     }
 748
 749     if (shutdown(sioc->fd, sockhow) < 0) {
 750         error_setg_errno(errp, errno,
 751                          "Unable to shutdown socket");
 752         return -1;
 753     }
 754     return 0;
 755 }
 756
 757 static void qio_channel_socket_set_aio_fd_handler(QIOChannel *ioc,
 758                                                   AioContext *ctx,
 759                                                   IOHandler *io_read,
 760                                                   IOHandler *io_write,
 761                                                   void *opaque)
 762 {
 763     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 764     aio_set_fd_handler(ctx, sioc->fd, false,
 765                        io_read, io_write, NULL, NULL, opaque);
 766 }
 767
 768 static GSource *qio_channel_socket_create_watch(QIOChannel *ioc,
 769                                                 GIOCondition condition)
 770 {
 771     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 772     return qio_channel_create_socket_watch(ioc,
 773                                            sioc->fd,
 774                                            condition);
 775 }
 776
 777 static void qio_channel_socket_class_init(ObjectClass *klass,
 778                                           void *class_data G_GNUC_UNUSED)
 779 {
 780     QIOChannelClass *ioc_klass = QIO_CHANNEL_CLASS(klass);
 781
 782     ioc_klass->io_writev = qio_channel_socket_writev;
 783     ioc_klass->io_readv = qio_channel_socket_readv;
 784     ioc_klass->io_set_blocking = qio_channel_socket_set_blocking;
 785     ioc_klass->io_close = qio_channel_socket_close;
 786     ioc_klass->io_shutdown = qio_channel_socket_shutdown;
 787     ioc_klass->io_set_cork = qio_channel_socket_set_cork;
 788     ioc_klass->io_set_delay = qio_channel_socket_set_delay;
 789     ioc_klass->io_create_watch = qio_channel_socket_create_watch;
 790     ioc_klass->io_set_aio_fd_handler = qio_channel_socket_set_aio_fd_handler;
 791 }
 792
 793 static const TypeInfo qio_channel_socket_info = {
 794     .parent = TYPE_QIO_CHANNEL,
 795     .name = TYPE_QIO_CHANNEL_SOCKET,
 796     .instance_size = sizeof(QIOChannelSocket),
 797     .instance_init = qio_channel_socket_init,
 798     .instance_finalize = qio_channel_socket_finalize,
 799     .class_init = qio_channel_socket_class_init,
 800 };
 801
 802 static void qio_channel_socket_register_types(void)
 803 {
 804     type_register_static(&qio_channel_socket_info);
 805 }
 806
 807 type_init(qio_channel_socket_register_types);