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