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(object_new(TYPE_QIO_CHANNEL_SOCKET));
 335     cioc->fd = -1;
 336     cioc->remoteAddrLen = sizeof(ioc->remoteAddr);
 337     cioc->localAddrLen = sizeof(ioc->localAddr);
 338
 339 #ifdef WIN32
 340     QIO_CHANNEL(cioc)->event = CreateEvent(NULL, FALSE, FALSE, NULL);
 341 #endif
 342
 343
 344  retry:
 345     trace_qio_channel_socket_accept(ioc);
 346     cioc->fd = qemu_accept(ioc->fd, (struct sockaddr *)&cioc->remoteAddr,
 347                            &cioc->remoteAddrLen);
 348     if (cioc->fd < 0) {
 349         trace_qio_channel_socket_accept_fail(ioc);
 350         if (errno == EINTR) {
 351             goto retry;
 352         }
 353         goto error;
 354     }
 355
 356     if (getsockname(cioc->fd, (struct sockaddr *)&cioc->localAddr,
 357                     &cioc->localAddrLen) < 0) {
 358         error_setg_errno(errp, errno,
 359                          "Unable to query local socket address");
 360         goto error;
 361     }
 362
 363 #ifndef WIN32
 364     if (cioc->localAddr.ss_family == AF_UNIX) {
 365         QIOChannel *ioc_local = QIO_CHANNEL(cioc);
 366         qio_channel_set_feature(ioc_local, QIO_CHANNEL_FEATURE_FD_PASS);
 367     }
 368 #endif /* WIN32 */
 369
 370     trace_qio_channel_socket_accept_complete(ioc, cioc, cioc->fd);
 371     return cioc;
 372
 373  error:
 374     object_unref(OBJECT(cioc));
 375     return NULL;
 376 }
 377
 378 static void qio_channel_socket_init(Object *obj)
 379 {
 380     QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(obj);
 381     ioc->fd = -1;
 382 }
 383
 384 static void qio_channel_socket_finalize(Object *obj)
 385 {
 386     QIOChannelSocket *ioc = QIO_CHANNEL_SOCKET(obj);
 387
 388     if (ioc->fd != -1) {
 389         QIOChannel *ioc_local = QIO_CHANNEL(ioc);
 390         if (qio_channel_has_feature(ioc_local, QIO_CHANNEL_FEATURE_LISTEN)) {
 391             Error *err = NULL;
 392
 393             socket_listen_cleanup(ioc->fd, &err);
 394             if (err) {
 395                 error_report_err(err);
 396                 err = NULL;
 397             }
 398         }
 399 #ifdef WIN32
 400         WSAEventSelect(ioc->fd, NULL, 0);
 401 #endif
 402         closesocket(ioc->fd);
 403         ioc->fd = -1;
 404     }
 405 }
 406
 407
 408 #ifndef WIN32
 409 static void qio_channel_socket_copy_fds(struct msghdr *msg,
 410                                         int **fds, size_t *nfds)
 411 {
 412     struct cmsghdr *cmsg;
 413
 414     *nfds = 0;
 415     *fds = NULL;
 416
 417     for (cmsg = CMSG_FIRSTHDR(msg); cmsg; cmsg = CMSG_NXTHDR(msg, cmsg)) {
 418         int fd_size, i;
 419         int gotfds;
 420
 421         if (cmsg->cmsg_len < CMSG_LEN(sizeof(int)) ||
 422             cmsg->cmsg_level != SOL_SOCKET ||
 423             cmsg->cmsg_type != SCM_RIGHTS) {
 424             continue;
 425         }
 426
 427         fd_size = cmsg->cmsg_len - CMSG_LEN(0);
 428
 429         if (!fd_size) {
 430             continue;
 431         }
 432
 433         gotfds = fd_size / sizeof(int);
 434         *fds = g_renew(int, *fds, *nfds + gotfds);
 435         memcpy(*fds + *nfds, CMSG_DATA(cmsg), fd_size);
 436
 437         for (i = 0; i < gotfds; i++) {
 438             int fd = (*fds)[*nfds + i];
 439             if (fd < 0) {
 440                 continue;
 441             }
 442
 443             /* O_NONBLOCK is preserved across SCM_RIGHTS so reset it */
 444             qemu_set_block(fd);
 445
 446 #ifndef MSG_CMSG_CLOEXEC
 447             qemu_set_cloexec(fd);
 448 #endif
 449         }
 450         *nfds += gotfds;
 451     }
 452 }
 453
 454
 455 static ssize_t qio_channel_socket_readv(QIOChannel *ioc,
 456                                         const struct iovec *iov,
 457                                         size_t niov,
 458                                         int **fds,
 459                                         size_t *nfds,
 460                                         Error **errp)
 461 {
 462     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 463     ssize_t ret;
 464     struct msghdr msg = { NULL, };
 465     char control[CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS)];
 466     int sflags = 0;
 467
 468     memset(control, 0, CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS));
 469
 470 #ifdef MSG_CMSG_CLOEXEC
 471     sflags |= MSG_CMSG_CLOEXEC;
 472 #endif
 473
 474     msg.msg_iov = (struct iovec *)iov;
 475     msg.msg_iovlen = niov;
 476     if (fds && nfds) {
 477         msg.msg_control = control;
 478         msg.msg_controllen = sizeof(control);
 479     }
 480
 481  retry:
 482     ret = recvmsg(sioc->fd, &msg, sflags);
 483     if (ret < 0) {
 484         if (errno == EAGAIN) {
 485             return QIO_CHANNEL_ERR_BLOCK;
 486         }
 487         if (errno == EINTR) {
 488             goto retry;
 489         }
 490
 491         error_setg_errno(errp, errno,
 492                          "Unable to read from socket");
 493         return -1;
 494     }
 495
 496     if (fds && nfds) {
 497         qio_channel_socket_copy_fds(&msg, fds, nfds);
 498     }
 499
 500     return ret;
 501 }
 502
 503 static ssize_t qio_channel_socket_writev(QIOChannel *ioc,
 504                                          const struct iovec *iov,
 505                                          size_t niov,
 506                                          int *fds,
 507                                          size_t nfds,
 508                                          Error **errp)
 509 {
 510     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 511     ssize_t ret;
 512     struct msghdr msg = { NULL, };
 513     char control[CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS)];
 514     size_t fdsize = sizeof(int) * nfds;
 515     struct cmsghdr *cmsg;
 516
 517     memset(control, 0, CMSG_SPACE(sizeof(int) * SOCKET_MAX_FDS));
 518
 519     msg.msg_iov = (struct iovec *)iov;
 520     msg.msg_iovlen = niov;
 521
 522     if (nfds) {
 523         if (nfds > SOCKET_MAX_FDS) {
 524             error_setg_errno(errp, EINVAL,
 525                              "Only %d FDs can be sent, got %zu",
 526                              SOCKET_MAX_FDS, nfds);
 527             return -1;
 528         }
 529
 530         msg.msg_control = control;
 531         msg.msg_controllen = CMSG_SPACE(sizeof(int) * nfds);
 532
 533         cmsg = CMSG_FIRSTHDR(&msg);
 534         cmsg->cmsg_len = CMSG_LEN(fdsize);
 535         cmsg->cmsg_level = SOL_SOCKET;
 536         cmsg->cmsg_type = SCM_RIGHTS;
 537         memcpy(CMSG_DATA(cmsg), fds, fdsize);
 538     }
 539
 540  retry:
 541     ret = sendmsg(sioc->fd, &msg, 0);
 542     if (ret <= 0) {
 543         if (errno == EAGAIN) {
 544             return QIO_CHANNEL_ERR_BLOCK;
 545         }
 546         if (errno == EINTR) {
 547             goto retry;
 548         }
 549         error_setg_errno(errp, errno,
 550                          "Unable to write to socket");
 551         return -1;
 552     }
 553     return ret;
 554 }
 555 #else /* WIN32 */
 556 static ssize_t qio_channel_socket_readv(QIOChannel *ioc,
 557                                         const struct iovec *iov,
 558                                         size_t niov,
 559                                         int **fds,
 560                                         size_t *nfds,
 561                                         Error **errp)
 562 {
 563     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 564     ssize_t done = 0;
 565     ssize_t i;
 566
 567     for (i = 0; i < niov; i++) {
 568         ssize_t ret;
 569     retry:
 570         ret = recv(sioc->fd,
 571                    iov[i].iov_base,
 572                    iov[i].iov_len,
 573                    0);
 574         if (ret < 0) {
 575             if (errno == EAGAIN) {
 576                 if (done) {
 577                     return done;
 578                 } else {
 579                     return QIO_CHANNEL_ERR_BLOCK;
 580                 }
 581             } else if (errno == EINTR) {
 582                 goto retry;
 583             } else {
 584                 error_setg_errno(errp, errno,
 585                                  "Unable to read from socket");
 586                 return -1;
 587             }
 588         }
 589         done += ret;
 590         if (ret < iov[i].iov_len) {
 591             return done;
 592         }
 593     }
 594
 595     return done;
 596 }
 597
 598 static ssize_t qio_channel_socket_writev(QIOChannel *ioc,
 599                                          const struct iovec *iov,
 600                                          size_t niov,
 601                                          int *fds,
 602                                          size_t nfds,
 603                                          Error **errp)
 604 {
 605     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 606     ssize_t done = 0;
 607     ssize_t i;
 608
 609     for (i = 0; i < niov; i++) {
 610         ssize_t ret;
 611     retry:
 612         ret = send(sioc->fd,
 613                    iov[i].iov_base,
 614                    iov[i].iov_len,
 615                    0);
 616         if (ret < 0) {
 617             if (errno == EAGAIN) {
 618                 if (done) {
 619                     return done;
 620                 } else {
 621                     return QIO_CHANNEL_ERR_BLOCK;
 622                 }
 623             } else if (errno == EINTR) {
 624                 goto retry;
 625             } else {
 626                 error_setg_errno(errp, errno,
 627                                  "Unable to write to socket");
 628                 return -1;
 629             }
 630         }
 631         done += ret;
 632         if (ret < iov[i].iov_len) {
 633             return done;
 634         }
 635     }
 636
 637     return done;
 638 }
 639 #endif /* WIN32 */
 640
 641 static int
 642 qio_channel_socket_set_blocking(QIOChannel *ioc,
 643                                 bool enabled,
 644                                 Error **errp)
 645 {
 646     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 647
 648     if (enabled) {
 649         qemu_set_block(sioc->fd);
 650     } else {
 651         qemu_set_nonblock(sioc->fd);
 652 #ifdef WIN32
 653         WSAEventSelect(sioc->fd, ioc->event,
 654                        FD_READ | FD_ACCEPT | FD_CLOSE |
 655                        FD_CONNECT | FD_WRITE | FD_OOB);
 656 #endif
 657     }
 658     return 0;
 659 }
 660
 661
 662 static void
 663 qio_channel_socket_set_delay(QIOChannel *ioc,
 664                              bool enabled)
 665 {
 666     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 667     int v = enabled ? 0 : 1;
 668
 669     qemu_setsockopt(sioc->fd,
 670                     IPPROTO_TCP, TCP_NODELAY,
 671                     &v, sizeof(v));
 672 }
 673
 674
 675 static void
 676 qio_channel_socket_set_cork(QIOChannel *ioc,
 677                             bool enabled)
 678 {
 679     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 680     int v = enabled ? 1 : 0;
 681
 682     socket_set_cork(sioc->fd, v);
 683 }
 684
 685
 686 static int
 687 qio_channel_socket_close(QIOChannel *ioc,
 688                          Error **errp)
 689 {
 690     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 691
 692     if (sioc->fd != -1) {
 693 #ifdef WIN32
 694         WSAEventSelect(sioc->fd, NULL, 0);
 695 #endif
 696         if (closesocket(sioc->fd) < 0) {
 697             sioc->fd = -1;
 698             error_setg_errno(errp, errno,
 699                              "Unable to close socket");
 700             return -1;
 701         }
 702         sioc->fd = -1;
 703     }
 704     return 0;
 705 }
 706
 707 static int
 708 qio_channel_socket_shutdown(QIOChannel *ioc,
 709                             QIOChannelShutdown how,
 710                             Error **errp)
 711 {
 712     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 713     int sockhow;
 714
 715     switch (how) {
 716     case QIO_CHANNEL_SHUTDOWN_READ:
 717         sockhow = SHUT_RD;
 718         break;
 719     case QIO_CHANNEL_SHUTDOWN_WRITE:
 720         sockhow = SHUT_WR;
 721         break;
 722     case QIO_CHANNEL_SHUTDOWN_BOTH:
 723     default:
 724         sockhow = SHUT_RDWR;
 725         break;
 726     }
 727
 728     if (shutdown(sioc->fd, sockhow) < 0) {
 729         error_setg_errno(errp, errno,
 730                          "Unable to shutdown socket");
 731         return -1;
 732     }
 733     return 0;
 734 }
 735
 736 static GSource *qio_channel_socket_create_watch(QIOChannel *ioc,
 737                                                 GIOCondition condition)
 738 {
 739     QIOChannelSocket *sioc = QIO_CHANNEL_SOCKET(ioc);
 740     return qio_channel_create_socket_watch(ioc,
 741                                            sioc->fd,
 742                                            condition);
 743 }
 744
 745 static void qio_channel_socket_class_init(ObjectClass *klass,
 746                                           void *class_data G_GNUC_UNUSED)
 747 {
 748     QIOChannelClass *ioc_klass = QIO_CHANNEL_CLASS(klass);
 749
 750     ioc_klass->io_writev = qio_channel_socket_writev;
 751     ioc_klass->io_readv = qio_channel_socket_readv;
 752     ioc_klass->io_set_blocking = qio_channel_socket_set_blocking;
 753     ioc_klass->io_close = qio_channel_socket_close;
 754     ioc_klass->io_shutdown = qio_channel_socket_shutdown;
 755     ioc_klass->io_set_cork = qio_channel_socket_set_cork;
 756     ioc_klass->io_set_delay = qio_channel_socket_set_delay;
 757     ioc_klass->io_create_watch = qio_channel_socket_create_watch;
 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);