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