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