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