src/common/socket.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2015 Hiroyuki Yamamoto and the Claws Mail team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #include "claws-features.h"
  23 #endif
  24
  25 #if (defined (_XOPEN_SOURCE) && !defined (_BSD_SOURCE))
  26 #define _BSD_SOURCE
  27 #endif
  28
  29 /* This can probably be handled better, e.g. define it in config.h. */
  30 #define _WIN32_WINNT _WIN32_WINNT_WIN6
  31 #include <glib.h>
  32 #include <glib/gi18n.h>
  33
  34 #include <sys/time.h>
  35 #include <sys/types.h>
  36 #ifdef G_OS_WIN32
  37 #  include <ws2tcpip.h>
  38 #  ifndef EINPROGRESS
  39 #    define EINPROGRESS WSAEINPROGRESS
  40 #  endif
  41 #  include "w32lib.h"
  42 #else
  43 #  if HAVE_SYS_WAIT_H
  44 #    include <sys/wait.h>
  45 #  endif
  46 #  include <sys/socket.h>
  47 #  include <sys/stat.h>
  48 #  include <sys/un.h>
  49 #  include <netinet/in.h>
  50 #  include <arpa/inet.h>
  51 #  include <resolv.h>
  52 #  include <netdb.h>
  53 #endif /* G_OS_WIN32 */
  54 #include <unistd.h>
  55 #include <stdio.h>
  56 #include <string.h>
  57 #include <stdarg.h>
  58 #include <fcntl.h>
  59 #include <errno.h>
  60 #include <signal.h>
  61 #include <setjmp.h>
  62 #if HAVE_SYS_SELECT_H
  63 #  include <sys/select.h>
  64 #endif
  65
  66 #include "socket.h"
  67 #include "utils.h"
  68 #include "log.h"
  69 #ifdef USE_GNUTLS
  70 #  include "ssl.h"
  71 #endif
  72
  73 #if USE_GIO
  74 #error USE_GIO is currently not supported
  75 #endif
  76
  77 #if G_IO_WIN32
  78 #define BUFFSIZE        8191
  79 #else
  80 #define BUFFSIZE        8192
  81 #endif
  82
  83
  84 typedef gint (*SockAddrFunc)    (GList          *addr_list,
  85                                  gpointer        data);
  86
  87 typedef struct _SockConnectData SockConnectData;
  88 typedef struct _SockLookupData  SockLookupData;
  89 typedef struct _SockAddrData    SockAddrData;
  90 typedef struct _SockSource      SockSource;
  91
  92 struct _SockConnectData {
  93         gint id;
  94         gchar *hostname;
  95         gushort port;
  96         GList *addr_list;
  97         GList *cur_addr;
  98         SockLookupData *lookup_data;
  99         GIOChannel *channel;
 100         guint io_tag;
 101         SockConnectFunc func;
 102         gpointer data;
 103         gchar *canonical_name;
 104 };
 105
 106 struct _SockLookupData {
 107         gchar *hostname;
 108         pid_t child_pid;
 109         GIOChannel *channel;
 110         guint io_tag;
 111         SockAddrFunc func;
 112         gpointer data;
 113         gushort port;
 114         gint pipe_fds[2];
 115         gchar *canonical_name;
 116 };
 117
 118 struct _SockAddrData {
 119         gint family;
 120         gint socktype;
 121         gint protocol;
 122         gint addr_len;
 123         struct sockaddr *addr;
 124 };
 125
 126 struct _SockSource {
 127         GSource parent;
 128         SockInfo *sock;
 129 };
 130
 131 static guint io_timeout = 60;
 132
 133 static GList *sock_connect_data_list = NULL;
 134
 135 static gboolean ssl_sock_prepare        (GSource        *source,
 136                                          gint           *timeout);
 137 static gboolean ssl_sock_check          (GSource        *source);
 138 static gboolean ssl_sock_dispatch       (GSource        *source,
 139                                          GSourceFunc     callback,
 140                                          gpointer        user_data);
 141
 142 #ifdef USE_GNUTLS
 143 GSourceFuncs ssl_watch_funcs = {
 144         ssl_sock_prepare,
 145         ssl_sock_check,
 146         ssl_sock_dispatch,
 147         NULL
 148 };
 149 #endif
 150
 151 static gint sock_connect_with_timeout   (gint                    sock,
 152                                          const struct sockaddr  *serv_addr,
 153                                          gint                    addrlen,
 154                                          guint                   timeout_secs);
 155
 156 static gint sock_connect_by_getaddrinfo (const gchar    *hostname,
 157                                          gushort         port);
 158
 159 static SockInfo *sockinfo_from_fd(const gchar *hostname,
 160                                   gushort port,
 161                                   gint sock);
 162 static void sock_address_list_free              (GList          *addr_list);
 163
 164 static gboolean sock_connect_async_cb           (GIOChannel     *source,
 165                                                  GIOCondition    condition,
 166                                                  gpointer        data);
 167 static gint sock_connect_async_get_address_info_cb
 168                                                 (GList          *addr_list,
 169                                                  gpointer        data);
 170
 171 static gint sock_connect_address_list_async     (SockConnectData *conn_data);
 172
 173 static gboolean sock_get_address_info_async_cb  (GIOChannel     *source,
 174                                                  GIOCondition    condition,
 175                                                  gpointer        data);
 176 static SockLookupData *sock_get_address_info_async
 177                                                 (const gchar    *hostname,
 178                                                  gushort         port,
 179                                                  SockAddrFunc    func,
 180                                                  gpointer        data);
 181 static gint sock_get_address_info_async_cancel  (SockLookupData *lookup_data);
 182
 183
 184 gint sock_init(void)
 185 {
 186 #ifdef G_OS_WIN32
 187         WSADATA wsadata;
 188         gint result;
 189
 190         result = WSAStartup(MAKEWORD(2, 2), &wsadata);
 191         if (result != NO_ERROR) {
 192                 g_warning("WSAStartup() failed");
 193                 return -1;
 194         }
 195 #endif
 196         return 0;
 197 }
 198
 199 gint sock_cleanup(void)
 200 {
 201 #ifdef G_OS_WIN32
 202         WSACleanup();
 203 #endif
 204         return 0;
 205 }
 206
 207 gint sock_set_io_timeout(guint sec)
 208 {
 209         io_timeout = sec;
 210         return 0;
 211 }
 212
 213 void refresh_resolvers(void)
 214 {
 215 #ifdef G_OS_UNIX
 216         static time_t resolv_conf_changed = (time_t)NULL;
 217         GStatBuf s;
 218
 219         /* This makes the glibc re-read resolv.conf, if it changed
 220          * since our startup. Maybe that should be #ifdef'ed, I don't
 221          * know if it'd work on BSDs.
 222          * Why doesn't the glibc do it by itself?
 223          */
 224         if (g_stat("/etc/resolv.conf", &s) == 0) {
 225                 if (s.st_mtime > resolv_conf_changed) {
 226                         resolv_conf_changed = s.st_mtime;
 227                         res_init();
 228                 }
 229         } /* else
 230                 we'll have bigger problems. */
 231 #endif /*G_OS_UNIX*/
 232 }
 233
 234 #ifdef G_OS_WIN32
 235 #define SOCKET_IS_VALID(s)      ((s) != INVALID_SOCKET)
 236 #else
 237 #define SOCKET_IS_VALID(s)      (s != -1)
 238 #endif
 239
 240 /* Due to the fact that socket under Windows are not represented by
 241    standard file descriptors, we sometimes need to check whether a
 242    given file descriptor is actually a socket.  This is done by
 243    testing for an error.  Returns true under W32 if FD is a socket. */
 244 static int fd_is_w32_socket(gint fd)
 245 {
 246 #ifdef G_OS_WIN32
 247         gint optval;
 248         gint retval = sizeof(optval);
 249
 250         return !getsockopt(fd, SOL_SOCKET, SO_TYPE, (char*)&optval, &retval);
 251 #else
 252         return 0;
 253 #endif
 254 }
 255
 256 gint fd_connect_inet(gushort port)
 257 {
 258         gint sock;
 259         struct sockaddr_in addr;
 260
 261         sock = socket(AF_INET, SOCK_STREAM, 0);
 262         if (!SOCKET_IS_VALID(sock)) {
 263 #ifdef G_OS_WIN32
 264                 debug_print("fd_connect_inet(): socket() failed: %d\n",
 265                           WSAGetLastError());
 266 #else
 267                 perror("fd_connect_inet(): socket");
 268 #endif
 269                 return -1;
 270         }
 271
 272         memset(&addr, 0, sizeof(addr));
 273         addr.sin_family = AF_INET;
 274         addr.sin_port = htons(port);
 275         addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 276
 277         if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 278                 fd_close(sock);
 279                 return -1;
 280         }
 281
 282         return sock;
 283 }
 284 gint fd_open_inet(gushort port)
 285 {
 286         gint sock;
 287         struct sockaddr_in addr;
 288         gint val;
 289
 290         sock = socket(AF_INET, SOCK_STREAM, 0);
 291         if (!SOCKET_IS_VALID(sock)) {
 292 #ifdef G_OS_WIN32
 293                 g_warning("fd_open_inet(): socket() failed: %d",
 294                           WSAGetLastError());
 295 #else
 296                 perror("fd_open_inet(): socket");
 297 #endif
 298                 return -1;
 299         }
 300
 301         val = 1;
 302         if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *)&val,
 303                        sizeof(val)) < 0) {
 304                 perror("setsockopt");
 305                 fd_close(sock);
 306                 return -1;
 307         }
 308
 309         memset(&addr, 0, sizeof(addr));
 310         addr.sin_family = AF_INET;
 311         addr.sin_port = htons(port);
 312         addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 313
 314         if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 315                 perror("bind");
 316                 fd_close(sock);
 317                 return -1;
 318         }
 319
 320         if (listen(sock, 1) < 0) {
 321                 perror("listen");
 322                 fd_close(sock);
 323                 return -1;
 324         }
 325
 326         return sock;
 327 }
 328
 329 gint fd_connect_unix(const gchar *path)
 330 {
 331 #ifdef G_OS_UNIX
 332         gint sock;
 333         struct sockaddr_un addr;
 334
 335         sock = socket(PF_UNIX, SOCK_STREAM, 0);
 336         if (sock < 0) {
 337                 perror("sock_connect_unix(): socket");
 338                 return -1;
 339         }
 340
 341         memset(&addr, 0, sizeof(addr));
 342         addr.sun_family = AF_UNIX;
 343         strncpy(addr.sun_path, path, sizeof(addr.sun_path) - 1);
 344
 345         if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 346                 close(sock);
 347                 return -1;
 348         }
 349
 350         return sock;
 351 #else
 352         return -1;
 353 #endif
 354 }
 355
 356 gint fd_open_unix(const gchar *path)
 357 {
 358 #ifdef G_OS_UNIX
 359         gint sock;
 360         struct sockaddr_un addr;
 361
 362         sock = socket(PF_UNIX, SOCK_STREAM, 0);
 363
 364         if (sock < 0) {
 365                 perror("sock_open_unix(): socket");
 366                 return -1;
 367         }
 368
 369         memset(&addr, 0, sizeof(addr));
 370         addr.sun_family = AF_UNIX;
 371         strncpy(addr.sun_path, path, sizeof(addr.sun_path) - 1);
 372
 373         if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 374                 gchar *buf = g_strdup_printf("can't bind to %s", path);
 375                 perror(buf);
 376                 g_free(buf);
 377                 close(sock);
 378                 return -1;
 379         }
 380
 381         if (listen(sock, 1) < 0) {
 382                 gchar *buf = g_strdup_printf("can't listen on %s", path);
 383                 perror(buf);
 384                 g_free(buf);
 385                 close(sock);
 386                 return -1;
 387         }
 388
 389         return sock;
 390 #else
 391         return -1;
 392 #endif
 393 }
 394
 395 gint fd_accept(gint sock)
 396 {
 397         struct sockaddr_in caddr;
 398         guint caddr_len;
 399
 400         caddr_len = sizeof(caddr);
 401         return accept(sock, (struct sockaddr *)&caddr, &caddr_len);
 402 }
 403
 404
 405 static gint set_nonblocking_mode(gint fd, gboolean nonblock)
 406 {
 407 #ifdef G_OS_UNIX
 408         gint flags;
 409
 410         flags = fcntl(fd, F_GETFL, 0);
 411         if (flags < 0) {
 412                 perror("fcntl");
 413                 return -1;
 414         }
 415
 416         if (nonblock)
 417                 flags |= O_NONBLOCK;
 418         else
 419                 flags &= ~O_NONBLOCK;
 420
 421         return fcntl(fd, F_SETFL, flags);
 422 #else
 423         return -1;
 424 #endif
 425 }
 426
 427 gint sock_set_nonblocking_mode(SockInfo *sock, gboolean nonblock)
 428 {
 429         cm_return_val_if_fail(sock != NULL, -1);
 430
 431         return set_nonblocking_mode(sock->sock, nonblock);
 432 }
 433
 434 static gboolean is_nonblocking_mode(gint fd)
 435 {
 436 #ifdef G_OS_UNIX
 437         gint flags;
 438
 439         flags = fcntl(fd, F_GETFL, 0);
 440         if (flags < 0) {
 441                 perror("fcntl");
 442                 return FALSE;
 443         }
 444
 445         return ((flags & O_NONBLOCK) != 0);
 446 #else
 447         return FALSE;
 448 #endif
 449 }
 450
 451 gboolean sock_is_nonblocking_mode(SockInfo *sock)
 452 {
 453         cm_return_val_if_fail(sock != NULL, FALSE);
 454
 455         return is_nonblocking_mode(sock->sock);
 456 }
 457
 458
 459 #ifdef USE_GNUTLS
 460 static gboolean ssl_sock_prepare(GSource *source, gint *timeout)
 461 {
 462         *timeout = 1;
 463         return FALSE;
 464 }
 465
 466 static gboolean ssl_sock_check(GSource *source)
 467 {
 468         SockInfo *sock = ((SockSource *)source)->sock;
 469         struct timeval timeout = {0, 0};
 470         fd_set fds;
 471         GIOCondition condition = 0;
 472
 473         if (!sock || !sock->sock)
 474                 return FALSE;
 475
 476         condition = sock->condition;
 477
 478         if ((condition & G_IO_IN) == G_IO_IN &&
 479             gnutls_record_check_pending(sock->ssl) != 0)
 480                 return TRUE;
 481
 482         FD_ZERO(&fds);
 483         FD_SET(sock->sock, &fds);
 484
 485         select(sock->sock + 1,
 486                (condition & G_IO_IN)  ? &fds : NULL,
 487                (condition & G_IO_OUT) ? &fds : NULL,
 488                NULL, &timeout);
 489
 490         return FD_ISSET(sock->sock, &fds) != 0;
 491 }
 492
 493 static gboolean ssl_sock_dispatch(GSource *source, GSourceFunc callback,
 494                               gpointer user_data)
 495 {
 496         SockInfo *sock = ((SockSource *)source)->sock;
 497
 498         if (!sock || !sock->callback || !sock->data)
 499                 return FALSE;
 500
 501         return sock->callback(sock, sock->condition, sock->data);
 502 }
 503 #endif
 504
 505 static gboolean sock_watch_cb(GIOChannel *source, GIOCondition condition,
 506                               gpointer data)
 507 {
 508         SockInfo *sock = (SockInfo *)data;
 509
 510         if ((condition & sock->condition) == 0)
 511                 return TRUE;
 512
 513         return sock->callback(sock, sock->condition, sock->data);
 514 }
 515
 516 guint sock_add_watch(SockInfo *sock, GIOCondition condition, SockFunc func,
 517                      gpointer data)
 518 {
 519         if (!sock)
 520                 return FALSE;
 521
 522         sock->callback = func;
 523         sock->condition = condition;
 524         sock->data = data;
 525
 526 #ifdef USE_GNUTLS
 527         if (sock->ssl)
 528         {
 529                 GSource *source = g_source_new(&ssl_watch_funcs,
 530                                                sizeof(SockSource));
 531                 ((SockSource *) source)->sock = sock;
 532                 g_source_set_priority(source, G_PRIORITY_DEFAULT);
 533                 g_source_set_can_recurse(source, FALSE);
 534                 sock->g_source = g_source_attach(source, NULL);
 535                 g_source_unref (source); /* Refcount back down to 1 */
 536                 return sock->g_source;
 537         }
 538 #endif
 539
 540         return g_io_add_watch(sock->sock_ch, condition, sock_watch_cb, sock);
 541 }
 542
 543 static gint fd_check_io(gint fd, GIOCondition cond)
 544 {
 545         struct timeval timeout;
 546         fd_set fds;
 547
 548         if (is_nonblocking_mode(fd))
 549                 return 0;
 550
 551         timeout.tv_sec  = io_timeout;
 552         timeout.tv_usec = 0;
 553
 554         FD_ZERO(&fds);
 555         FD_SET(fd, &fds);
 556
 557         if (cond == G_IO_IN) {
 558                 select(fd + 1, &fds, NULL, NULL,
 559                        io_timeout > 0 ? &timeout : NULL);
 560         } else {
 561                 select(fd + 1, NULL, &fds, NULL,
 562                        io_timeout > 0 ? &timeout : NULL);
 563         }
 564
 565         if (FD_ISSET(fd, &fds)) {
 566                 return 0;
 567         } else {
 568                 g_warning("Socket IO timeout");
 569                 log_error(LOG_PROTOCOL, _("Socket IO timeout.\n"));
 570                 return -1;
 571         }
 572 }
 573
 574 #ifdef G_OS_UNIX
 575 static sigjmp_buf jmpenv;
 576
 577 static void timeout_handler(gint sig)
 578 {
 579         siglongjmp(jmpenv, 1);
 580 }
 581 #endif /*G_OS_UNIX*/
 582
 583 static gint sock_connect_with_timeout(gint sock,
 584                                       const struct sockaddr *serv_addr,
 585                                       gint addrlen,
 586                                       guint timeout_secs)
 587 {
 588         gint ret;
 589 #ifdef G_OS_UNIX
 590         void (*prev_handler)(gint);
 591
 592         alarm(0);
 593         prev_handler = signal(SIGALRM, timeout_handler);
 594         if (sigsetjmp(jmpenv, 1)) {
 595                 alarm(0);
 596                 signal(SIGALRM, prev_handler);
 597                 errno = ETIMEDOUT;
 598                 log_error(LOG_PROTOCOL, _("Connection timed out.\n"));
 599                 return -1;
 600         }
 601         alarm(timeout_secs);
 602 #endif
 603
 604         ret = connect(sock, serv_addr, addrlen);
 605
 606 #ifdef G_OS_UNIX
 607         alarm(0);
 608         signal(SIGALRM, prev_handler);
 609 #endif
 610
 611         return ret;
 612 }
 613
 614 static gint sock_connect_by_getaddrinfo(const gchar *hostname, gushort  port)
 615 {
 616         gint sock = -1, gai_error;
 617         struct addrinfo hints, *res, *ai;
 618         gchar port_str[6];
 619
 620         refresh_resolvers();
 621
 622         memset(&hints, 0, sizeof(hints));
 623         hints.ai_flags = AI_ADDRCONFIG;
 624
 625 #ifdef INET6
 626         hints.ai_family = AF_UNSPEC;
 627 #else
 628         hints.ai_family = AF_INET;
 629 #endif
 630
 631         hints.ai_socktype = SOCK_STREAM;
 632         hints.ai_protocol = IPPROTO_TCP;
 633
 634         /* convert port from integer to string. */
 635         g_snprintf(port_str, sizeof(port_str), "%d", port);
 636
 637         if ((gai_error = getaddrinfo(hostname, port_str, &hints, &res)) != 0) {
 638                 g_printerr("getaddrinfo for %s:%s failed: %s\n",
 639                         hostname, port_str, gai_strerror(gai_error));
 640                 return -1;
 641         }
 642
 643         for (ai = res; ai != NULL; ai = ai->ai_next) {
 644 #ifndef INET6
 645                 if (ai->ai_family == AF_INET6)
 646                         continue;
 647 #endif
 648
 649                 sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
 650                 if (sock < 0 )
 651                         continue;
 652 #ifdef G_OS_WIN32
 653                 if (sock == INVALID_SOCKET)
 654                         continue;
 655 #endif
 656
 657                 if (sock_connect_with_timeout
 658                         (sock, ai->ai_addr, ai->ai_addrlen, io_timeout) == 0)
 659                         break;
 660
 661                 close(sock);
 662         }
 663
 664         if (res != NULL)
 665                 freeaddrinfo(res);
 666
 667         if (ai == NULL)
 668                 return -1;
 669
 670         return sock;
 671 }
 672
 673 SockInfo *sock_connect(const gchar *hostname, gushort port)
 674 {
 675 #ifdef G_OS_WIN32
 676         SOCKET sock;
 677 #else
 678         gint sock;
 679 #endif
 680
 681         if ((sock = sock_connect_by_getaddrinfo(hostname, port)) < 0) {
 682                 return NULL;
 683         }
 684
 685         return sockinfo_from_fd(hostname, port, sock);
 686 }
 687
 688
 689 static void sock_address_list_free(GList *addr_list)
 690 {
 691         GList *cur;
 692
 693         for (cur = addr_list; cur != NULL; cur = cur->next) {
 694                 SockAddrData *addr_data = (SockAddrData *)cur->data;
 695                 g_free(addr_data->addr);
 696                 g_free(addr_data);
 697         }
 698
 699         g_list_free(addr_list);
 700 }
 701
 702 /* asynchronous TCP connection */
 703
 704 static gboolean sock_connect_async_cb(GIOChannel *source,
 705                                       GIOCondition condition, gpointer data)
 706 {
 707         SockConnectData *conn_data = (SockConnectData *)data;
 708         gint fd;
 709         gint val;
 710         guint len;
 711         SockInfo *sockinfo;
 712
 713         if (conn_data->io_tag == 0 && conn_data->channel == NULL)
 714                 return FALSE;
 715
 716         fd = g_io_channel_unix_get_fd(source);
 717
 718         conn_data->io_tag = 0;
 719         conn_data->channel = NULL;
 720         g_io_channel_unref(source);
 721
 722         len = sizeof(val);
 723         if (getsockopt(fd, SOL_SOCKET, SO_ERROR, &val, &len) < 0) {
 724                 perror("getsockopt");
 725                 close(fd);
 726                 sock_connect_address_list_async(conn_data);
 727                 return FALSE;
 728         }
 729
 730         if (val != 0) {
 731                 close(fd);
 732                 log_error(LOG_PROTOCOL, _("%s:%d: connection failed (%s).\n"),
 733                           conn_data->hostname, conn_data->port,
 734                           g_strerror(val));
 735                 sock_connect_address_list_async(conn_data);
 736                 return FALSE;
 737         }
 738
 739         sockinfo = g_new0(SockInfo, 1);
 740         sockinfo->sock = fd;
 741 #ifndef G_OS_WIN32
 742         sockinfo->sock_ch = g_io_channel_unix_new(fd);
 743 #else
 744         sockinfo->sock_ch = g_io_channel_win32_new_socket(fd);
 745 #endif
 746         sockinfo->hostname = g_strdup(conn_data->hostname);
 747         sockinfo->port = conn_data->port;
 748         sockinfo->state = CONN_ESTABLISHED;
 749         sockinfo->canonical_name = g_strdup(conn_data->canonical_name);
 750
 751         conn_data->func(sockinfo, conn_data->data);
 752
 753         sock_connect_async_cancel(conn_data->id);
 754
 755         return FALSE;
 756 }
 757
 758 static gint sock_connect_async_get_address_info_cb(GList *addr_list,
 759                                                    gpointer data)
 760 {
 761         SockConnectData *conn_data = (SockConnectData *)data;
 762
 763         conn_data->addr_list = addr_list;
 764         conn_data->cur_addr = addr_list;
 765         if (conn_data->lookup_data) {
 766                 conn_data->canonical_name = conn_data->lookup_data->canonical_name;
 767                 conn_data->lookup_data->canonical_name = NULL;
 768                 conn_data->lookup_data = NULL;
 769         }
 770         return sock_connect_address_list_async(conn_data);
 771 }
 772
 773 gint sock_connect_async(const gchar *hostname, gushort port,
 774                         SockConnectFunc func, gpointer data)
 775 {
 776         static gint id = 1;
 777         SockConnectData *conn_data;
 778
 779         conn_data = g_new0(SockConnectData, 1);
 780         conn_data->id = id++;
 781         conn_data->hostname = g_strdup(hostname);
 782         conn_data->port = port;
 783         conn_data->addr_list = NULL;
 784         conn_data->cur_addr = NULL;
 785         conn_data->io_tag = 0;
 786         conn_data->func = func;
 787         conn_data->data = data;
 788
 789         conn_data->lookup_data = sock_get_address_info_async
 790                 (hostname, port, sock_connect_async_get_address_info_cb,
 791                  conn_data);
 792
 793         if (conn_data->lookup_data == NULL) {
 794                 g_free(conn_data->hostname);
 795                 g_free(conn_data);
 796                 return -1;
 797         }
 798
 799         sock_connect_data_list = g_list_append(sock_connect_data_list,
 800                                                conn_data);
 801
 802         return conn_data->id;
 803 }
 804
 805 gint sock_connect_async_cancel(gint id)
 806 {
 807         SockConnectData *conn_data = NULL;
 808         GList *cur;
 809
 810         for (cur = sock_connect_data_list; cur != NULL; cur = cur->next) {
 811                 if (((SockConnectData *)cur->data)->id == id) {
 812                         conn_data = (SockConnectData *)cur->data;
 813                         break;
 814                 }
 815         }
 816
 817         if (conn_data) {
 818                 sock_connect_data_list = g_list_remove(sock_connect_data_list,
 819                                                        conn_data);
 820
 821                 if (conn_data->lookup_data)
 822                         sock_get_address_info_async_cancel
 823                                 (conn_data->lookup_data);
 824
 825                 if (conn_data->io_tag > 0)
 826                         g_source_remove(conn_data->io_tag);
 827                 if (conn_data->channel) {
 828                         GError *err = NULL;
 829                         g_io_channel_shutdown(conn_data->channel, TRUE, &err);
 830                         if (err)
 831                                 g_error_free(err);
 832                         g_io_channel_unref(conn_data->channel);
 833                 }
 834
 835                 sock_address_list_free(conn_data->addr_list);
 836                 g_free(conn_data->canonical_name);
 837                 g_free(conn_data->hostname);
 838                 g_free(conn_data);
 839         } else {
 840                 g_warning("sock_connect_async_cancel: id %d not found", id);
 841                 return -1;
 842         }
 843
 844         return 0;
 845 }
 846
 847 static gint sock_connect_address_list_async(SockConnectData *conn_data)
 848 {
 849         SockAddrData *addr_data;
 850         gint sock = -1;
 851
 852         for (; conn_data->cur_addr != NULL;
 853              conn_data->cur_addr = conn_data->cur_addr->next) {
 854                 addr_data = (SockAddrData *)conn_data->cur_addr->data;
 855
 856                 if ((sock = socket(addr_data->family, addr_data->socktype,
 857                                    addr_data->protocol)) < 0) {
 858                         perror("socket");
 859
 860                         continue;
 861                 }
 862
 863                 set_nonblocking_mode(sock, TRUE);
 864
 865                 if (connect(sock, addr_data->addr, addr_data->addr_len) < 0) {
 866                         if (EINPROGRESS == errno) {
 867                                 break;
 868                         } else {
 869                                 perror("connect");
 870                                 close(sock);
 871                         }
 872                 } else {
 873                         break;
 874                 }
 875         }
 876
 877         if (conn_data->cur_addr == NULL) {
 878                 conn_data->func(NULL, conn_data->data);
 879                 sock_connect_async_cancel(conn_data->id);
 880                 return -1;
 881         }
 882
 883         conn_data->cur_addr = conn_data->cur_addr->next;
 884
 885 #ifndef G_OS_WIN32
 886         conn_data->channel = g_io_channel_unix_new(sock);
 887 #else
 888         conn_data->channel = g_io_channel_win32_new_socket(sock);
 889 #endif
 890         conn_data->io_tag = g_io_add_watch(conn_data->channel, G_IO_IN|G_IO_OUT,
 891                                            sock_connect_async_cb, conn_data);
 892
 893         return 0;
 894 }
 895
 896 /* asynchronous DNS lookup */
 897
 898 static gboolean sock_get_address_info_async_cb(GIOChannel *source,
 899                                                GIOCondition condition,
 900                                                gpointer data)
 901 {
 902         SockLookupData *lookup_data = (SockLookupData *)data;
 903         GList *addr_list = NULL;
 904         SockAddrData *addr_data;
 905         gsize bytes_read;
 906         gint ai_member[4];
 907         struct sockaddr *addr;
 908         gchar *canonical_name = NULL;
 909         gchar len = 0;
 910         GError *err = NULL;
 911
 912         g_io_channel_set_encoding(source, NULL, &err);
 913         if (err) {
 914                 g_warning("can unset encoding: %s", err->message);
 915                 g_error_free(err);
 916                 return FALSE;
 917         }
 918         g_io_channel_set_buffered(source, FALSE);
 919         if (g_io_channel_read_chars(source, &len, sizeof(len),
 920                               &bytes_read, &err) == G_IO_STATUS_NORMAL) {
 921                 if (err != NULL) {
 922                         g_warning("g_io_channel_read_chars: %s", err->message);
 923                         g_error_free(err);
 924                         return FALSE;
 925                 }
 926                 if (bytes_read == sizeof(len) && len > 0) {
 927                         gchar *cur = NULL;
 928                         gint todo = len;
 929                         canonical_name = g_malloc0(len + 1);
 930                         cur = canonical_name;
 931                         while (todo > 0) {
 932                                 if (g_io_channel_read_chars(source, cur, todo,
 933                                       &bytes_read, &err) != G_IO_STATUS_NORMAL) {
 934                                         if (err) {
 935                                               g_warning("canonical name not read %s", err->message);
 936                                               g_free(canonical_name);
 937                                               canonical_name = NULL;
 938                                               g_error_free(err);
 939                                               err = NULL;
 940                                               break;
 941                                         }
 942                                 } else {
 943                                         cur += bytes_read;
 944                                         todo -= bytes_read;
 945                                 }
 946                                 if (bytes_read == 0) {
 947                                       g_warning("canonical name not read");
 948                                       g_free(canonical_name);
 949                                       canonical_name = NULL;
 950                                       break;
 951                                 }
 952                         }
 953                 }
 954         }
 955         for (;;) {
 956                 if (g_io_channel_read_chars(source, (gchar *)ai_member,
 957                                       sizeof(ai_member), &bytes_read, &err)
 958                     != G_IO_STATUS_NORMAL) {
 959                         if (err != NULL) {
 960                                 g_warning("g_io_channel_read_chars: addr len %s", err->message);
 961                                 g_error_free(err);
 962                                 err = NULL;
 963                                 break;
 964                         }
 965                 }
 966
 967                 if (bytes_read == 0 || bytes_read != sizeof(ai_member))
 968                         break;
 969
 970                 if (ai_member[0] == AF_UNSPEC) {
 971                         g_warning("DNS lookup failed");
 972                         log_error(LOG_PROTOCOL, _("%s:%d: unknown host.\n"),
 973                                 lookup_data->hostname, lookup_data->port);
 974                         break;
 975                 }
 976
 977                 addr = g_malloc(ai_member[3]);
 978                 if (g_io_channel_read_chars(source, (gchar *)addr, ai_member[3],
 979                                       &bytes_read, &err)
 980                     != G_IO_STATUS_NORMAL) {
 981                         if (err != NULL) {
 982                                 g_warning("g_io_channel_read_chars: addr data read %s", err->message);
 983                                 g_error_free(err);
 984                                 err = NULL;
 985                                 g_free(addr);
 986                                 break;
 987                         }
 988                 }
 989
 990                 if (bytes_read != ai_member[3]) {
 991                         g_warning("sock_get_address_info_async_cb: "
 992                                   "incomplete address data");
 993                         g_free(addr);
 994                         break;
 995                 }
 996
 997                 addr_data = g_new0(SockAddrData, 1);
 998                 addr_data->family = ai_member[0];
 999                 addr_data->socktype = ai_member[1];
1000                 addr_data->protocol = ai_member[2];
1001                 addr_data->addr_len = ai_member[3];
1002                 addr_data->addr = addr;
1003
1004                 addr_list = g_list_append(addr_list, addr_data);
1005         }
1006
1007         g_io_channel_shutdown(source, TRUE, &err);
1008         if (err)
1009                 g_error_free(err);
1010         g_io_channel_unref(source);
1011
1012 #ifdef G_OS_WIN32
1013         /* FIXME: We would need to cancel the thread. */
1014 #else
1015         kill(lookup_data->child_pid, SIGKILL);
1016         waitpid(lookup_data->child_pid, NULL, 0);
1017 #endif
1018         lookup_data->canonical_name = canonical_name;
1019
1020         lookup_data->func(addr_list, lookup_data->data);
1021
1022         g_free(lookup_data->canonical_name);
1023         g_free(lookup_data->hostname);
1024         g_free(lookup_data);
1025
1026         return FALSE;
1027 }
1028
1029
1030 /* For better readability we use a separate function to implement the
1031    child code of sock_get_address_info_async.  Note, that under W32
1032    this is actually not a child but a thread and this is the reason
1033    why we pass only a void pointer. */
1034 static void address_info_async_child(void *opaque)
1035 {
1036         SockLookupData *parm = opaque;
1037         gint gai_err;
1038         struct addrinfo hints, *res, *ai;
1039         gchar port_str[6];
1040         gint ai_member[4] = {AF_UNSPEC, 0, 0, 0};
1041
1042 #ifndef G_OS_WIN32
1043         close(parm->pipe_fds[0]);
1044         parm->pipe_fds[0] = -1;
1045 #endif
1046
1047         memset(&hints, 0, sizeof(hints));
1048         hints.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
1049 #ifdef INET6
1050         hints.ai_family = AF_UNSPEC;
1051 #else
1052                                 hints.ai_family = AF_INET;
1053 #endif
1054         hints.ai_socktype = SOCK_STREAM;
1055         hints.ai_protocol = IPPROTO_TCP;
1056
1057         g_snprintf(port_str, sizeof(port_str), "%d", parm->port);
1058
1059         gai_err = getaddrinfo(parm->hostname, port_str, &hints, &res);
1060         if (gai_err != 0) {
1061                 gchar len = 0;
1062                 g_warning("getaddrinfo for %s:%s failed: %s",
1063                           parm->hostname, port_str, gai_strerror(gai_err));
1064                 log_error(LOG_PROTOCOL, _("%s:%s: host lookup failed (%s).\n"),
1065                           parm->hostname, port_str, gai_strerror(gai_err));
1066                 fd_write_all(parm->pipe_fds[1], &len,
1067                      sizeof(len));
1068                 fd_write_all(parm->pipe_fds[1], (gchar *)ai_member,
1069                              sizeof(ai_member));
1070                 close(parm->pipe_fds[1]);
1071                 parm->pipe_fds[1] = -1;
1072 #ifdef G_OS_WIN32
1073                 _endthread();
1074 #else
1075                 _exit(1);
1076 #endif
1077         }
1078
1079         if (res != NULL) {
1080                 if (res->ai_canonname && strlen(res->ai_canonname) < 255) {
1081                         gchar len = strlen(res->ai_canonname);
1082                         fd_write_all(parm->pipe_fds[1], &len,
1083                              sizeof(len));
1084                         fd_write_all(parm->pipe_fds[1], res->ai_canonname,
1085                              len);
1086                 } else {
1087                         gchar len = 0;
1088                         fd_write_all(parm->pipe_fds[1], &len,
1089                              sizeof(len));
1090                 }
1091         } else {
1092                 gchar len = 0;
1093                 fd_write_all(parm->pipe_fds[1], &len,
1094                      sizeof(len));
1095         }
1096
1097         for (ai = res; ai != NULL; ai = ai->ai_next) {
1098                 ai_member[0] = ai->ai_family;
1099                 ai_member[1] = ai->ai_socktype;
1100                 ai_member[2] = ai->ai_protocol;
1101                 ai_member[3] = ai->ai_addrlen;
1102
1103                 fd_write_all(parm->pipe_fds[1], (gchar *)ai_member,
1104                              sizeof(ai_member));
1105                 fd_write_all(parm->pipe_fds[1], (gchar *)ai->ai_addr,
1106                              ai->ai_addrlen);
1107         }
1108
1109         if (res != NULL)
1110                 freeaddrinfo(res);
1111
1112         close(parm->pipe_fds[1]);
1113         parm->pipe_fds[1] = -1;
1114
1115 #ifdef G_OS_WIN32
1116         _endthread();
1117 #else
1118         _exit(0);
1119 #endif
1120 }
1121
1122 static SockLookupData *sock_get_address_info_async(const gchar *hostname,
1123                                                    gushort port,
1124                                                    SockAddrFunc func,
1125                                                    gpointer data)
1126 {
1127         SockLookupData *lookup_data = NULL;
1128
1129         refresh_resolvers();
1130
1131         lookup_data = g_new0(SockLookupData, 1);
1132         lookup_data->hostname = g_strdup(hostname);
1133         lookup_data->func = func;
1134         lookup_data->data = data;
1135         lookup_data->port = port;
1136         lookup_data->child_pid = (pid_t)(-1);
1137         lookup_data->pipe_fds[0] = -1;
1138         lookup_data->pipe_fds[1] = -1;
1139
1140         if (pipe(lookup_data->pipe_fds) < 0) {
1141                 perror("pipe");
1142                 func(NULL, data);
1143                 g_free (lookup_data->hostname);
1144                 g_free (lookup_data);
1145                 return NULL;
1146         }
1147
1148 #ifndef G_OS_WIN32
1149         if ((lookup_data->child_pid = fork()) < 0) {
1150                 perror("fork");
1151                 func(NULL, data);
1152                 g_free (lookup_data->hostname);
1153                 g_free (lookup_data);
1154                 return NULL;
1155         }
1156
1157         if (lookup_data->child_pid == 0) {
1158                 /* Child process. */
1159                 address_info_async_child (lookup_data);
1160                 g_assert_not_reached ();
1161         }
1162         /* Parent process. */
1163         close(lookup_data->pipe_fds[1]);
1164         lookup_data->pipe_fds[1] = -1;
1165 #endif  /*!G_OS_WIN32 */
1166
1167 #ifndef G_OS_WIN32
1168         lookup_data->channel = g_io_channel_unix_new(lookup_data->pipe_fds[0]);
1169 #else
1170         lookup_data->channel = g_io_channel_win32_new_fd(lookup_data->pipe_fds[0]);
1171 #endif
1172         lookup_data->io_tag = g_io_add_watch(lookup_data->channel, G_IO_IN,
1173                                              sock_get_address_info_async_cb,
1174                                              lookup_data);
1175 #ifdef G_OS_WIN32
1176         lookup_data->child_pid = _beginthread(
1177                 address_info_async_child, 0, lookup_data);
1178 #endif
1179
1180         return lookup_data;
1181 }
1182
1183 static gint sock_get_address_info_async_cancel(SockLookupData *lookup_data)
1184 {
1185         if (lookup_data->io_tag > 0)
1186                 g_source_remove(lookup_data->io_tag);
1187         if (lookup_data->channel) {
1188                 GError *err = NULL;
1189                 g_io_channel_shutdown(lookup_data->channel, TRUE, &err);
1190                 if (err)
1191                         g_error_free(err);
1192
1193                 g_io_channel_unref(lookup_data->channel);
1194         }
1195
1196         if (lookup_data->child_pid > 0) {
1197 #ifdef G_OS_WIN32
1198                 /* FIXME: Need a way to cancel the thread. */
1199 #else
1200                 kill(lookup_data->child_pid, SIGKILL);
1201                 waitpid(lookup_data->child_pid, NULL, 0);
1202 #endif
1203         }
1204
1205         g_free(lookup_data->canonical_name);
1206         g_free(lookup_data->hostname);
1207         g_free(lookup_data);
1208
1209         return 0;
1210 }
1211
1212
1213 static SockInfo *sockinfo_from_fd(const gchar *hostname,
1214                                   gushort port,
1215                                   gint sock)
1216 {
1217         SockInfo *sockinfo;
1218
1219         sockinfo = g_new0(SockInfo, 1);
1220         sockinfo->sock = sock;
1221 #ifndef G_OS_WIN32
1222         sockinfo->sock_ch = g_io_channel_unix_new(sock);
1223 #else
1224         sockinfo->sock_ch = g_io_channel_win32_new_socket(sock);
1225 #endif
1226         sockinfo->hostname = g_strdup(hostname);
1227         sockinfo->port = port;
1228         sockinfo->state = CONN_ESTABLISHED;
1229
1230         return sockinfo;
1231 }
1232
1233 static gint fd_read(gint fd, gchar *buf, gint len)
1234 {
1235         if (fd_check_io(fd, G_IO_IN) < 0)
1236                 return -1;
1237
1238         if (fd_is_w32_socket(fd))
1239                 return recv(fd, buf, len, 0);
1240         return read(fd, buf, len);
1241 }
1242
1243 #if USE_GNUTLS
1244 static gint ssl_read(gnutls_session_t ssl, gchar *buf, gint len)
1245 {
1246         gint r;
1247
1248         if (gnutls_record_check_pending(ssl) == 0) {
1249                 if (fd_check_io(GPOINTER_TO_INT(gnutls_transport_get_ptr(ssl)), G_IO_IN) < 0)
1250                         return -1;
1251         }
1252
1253         while (1) {
1254                 r = gnutls_record_recv(ssl, buf, len);
1255                 if (r > 0)
1256                         return r;
1257
1258                 switch (r) {
1259                 case 0: /* closed connection */
1260                         return -1;
1261
1262                 case GNUTLS_E_REHANDSHAKE:
1263                         do {
1264                                 r = gnutls_handshake(ssl);
1265                         } while (r == GNUTLS_E_AGAIN || r == GNUTLS_E_INTERRUPTED);
1266                         break; /* re-receive */
1267                 case GNUTLS_E_AGAIN:
1268                 case GNUTLS_E_INTERRUPTED:
1269                         errno = EAGAIN;
1270                         return -1;
1271
1272                 default:
1273                         debug_print("Unexpected SSL read result %d\n", r);
1274                         errno = EIO;
1275                         return -1;
1276                 }
1277         }
1278
1279 }
1280 #endif
1281
1282 gint sock_read(SockInfo *sock, gchar *buf, gint len)
1283 {
1284         gint ret;
1285
1286         cm_return_val_if_fail(sock != NULL, -1);
1287
1288 #ifdef USE_GNUTLS
1289         if (sock->ssl)
1290                 ret = ssl_read(sock->ssl, buf, len);
1291         else
1292 #endif
1293                 ret = fd_read(sock->sock, buf, len);
1294
1295         if (ret < 0)
1296                 sock->state = CONN_DISCONNECTED;
1297         return ret;
1298 }
1299
1300 gint fd_write(gint fd, const gchar *buf, gint len)
1301 {
1302         if (fd_check_io(fd, G_IO_OUT) < 0)
1303                 return -1;
1304
1305         if (fd_is_w32_socket (fd))
1306                 return send(fd, buf, len, 0);
1307         return write(fd, buf, len);
1308 }
1309
1310 #if USE_GNUTLS
1311 static gint ssl_write(gnutls_session_t ssl, const gchar *buf, gint len)
1312 {
1313         gint ret;
1314
1315         if (fd_check_io(GPOINTER_TO_INT(gnutls_transport_get_ptr(ssl)), G_IO_OUT) < 0)
1316                 return -1;
1317
1318         ret = gnutls_record_send(ssl, buf, len);
1319
1320         switch (ret) {
1321         case 0:
1322                 return -1;
1323         case GNUTLS_E_AGAIN:
1324         case GNUTLS_E_INTERRUPTED:
1325                 return 0;
1326
1327         default:
1328                 return ret;
1329         }
1330 }
1331
1332 #endif
1333
1334 gint sock_write(SockInfo *sock, const gchar *buf, gint len)
1335 {
1336         gint ret;
1337
1338         cm_return_val_if_fail(sock != NULL, -1);
1339
1340 #ifdef USE_GNUTLS
1341         if (sock->ssl)
1342                 ret = ssl_write(sock->ssl, buf, len);
1343         else
1344 #endif
1345                 ret = fd_write(sock->sock, buf, len);
1346
1347         if (ret < 0)
1348                 sock->state = CONN_DISCONNECTED;
1349         return ret;
1350 }
1351
1352 gint fd_write_all(gint fd, const gchar *buf, gint len)
1353 {
1354         gint n, wrlen = 0;
1355
1356         while (len) {
1357                 if (fd_check_io(fd, G_IO_OUT) < 0)
1358                         return -1;
1359 #ifndef G_OS_WIN32
1360                 signal(SIGPIPE, SIG_IGN);
1361 #endif
1362                 if (fd_is_w32_socket(fd))
1363                         n = send(fd, buf, len, 0);
1364                 else
1365                         n = write(fd, buf, len);
1366
1367                 if (n <= 0) {
1368                         log_error(LOG_PROTOCOL, _("write on fd%d: %s\n"), fd, g_strerror(errno));
1369                         return -1;
1370                 }
1371                 len -= n;
1372                 wrlen += n;
1373                 buf += n;
1374         }
1375
1376         return wrlen;
1377 }
1378
1379 #ifdef USE_GNUTLS
1380 static gint ssl_write_all(gnutls_session_t ssl, const gchar *buf, gint len)
1381 {
1382         gint n, wrlen = 0;
1383
1384         while (len) {
1385                 n = ssl_write(ssl, buf, len);
1386                 if (n <= 0)
1387                         return -1;
1388                 len -= n;
1389                 wrlen += n;
1390                 buf += n;
1391         }
1392
1393         return wrlen;
1394 }
1395 #endif
1396
1397 gint sock_write_all(SockInfo *sock, const gchar *buf, gint len)
1398 {
1399         gint ret;
1400
1401         cm_return_val_if_fail(sock != NULL, -1);
1402
1403 #ifdef USE_GNUTLS
1404         if (sock->ssl)
1405                 ret = ssl_write_all(sock->ssl, buf, len);
1406         else
1407 #endif
1408                 ret = fd_write_all(sock->sock, buf, len);
1409
1410         if (ret < 0)
1411                 sock->state = CONN_DISCONNECTED;
1412         return ret;
1413 }
1414
1415 static gint fd_recv(gint fd, gchar *buf, gint len, gint flags)
1416 {
1417         if (fd_check_io(fd, G_IO_IN) < 0)
1418                 return -1;
1419
1420         return recv(fd, buf, len, flags);
1421 }
1422
1423 gint fd_gets(gint fd, gchar *buf, gint len)
1424 {
1425         gchar *newline, *bp = buf;
1426         gint n;
1427
1428         if (--len < 1)
1429                 return -1;
1430
1431 #ifdef G_OS_WIN32
1432         fd_check_io(fd, G_IO_IN);
1433         do {
1434 /*
1435 XXX:tm try nonblock
1436 MSKB Article ID: Q147714
1437 Windows Sockets 2 Service Provider Interface Limitations
1438 Polling with recv(MSG_PEEK) to determine when a complete message
1439 has arrived.
1440     Reason and Workaround not available.
1441
1442 Single-byte send() and recv().
1443     Reason: Couple one-byte sends with Nagle disabled.
1444     Workaround: Send modest amounts and receive as much as possible.
1445 (still unused)
1446 */
1447                 if (recv(fd, bp, 1, 0) <= 0)
1448                         return -1;
1449                 if (*bp == '\n')
1450                         break;
1451                 bp++;
1452                 len--;
1453         } while (0 < len);
1454 #else /*!G_OS_WIN32*/
1455         do {
1456                 if ((n = fd_recv(fd, bp, len, MSG_PEEK)) <= 0)
1457                         return -1;
1458                 if ((newline = memchr(bp, '\n', n)) != NULL)
1459                         n = newline - bp + 1;
1460                 if ((n = fd_read(fd, bp, n)) < 0)
1461                         return -1;
1462                 bp += n;
1463                 len -= n;
1464         } while (!newline && len);
1465 #endif /*!G_OS_WIN32*/
1466
1467         *bp = '\0';
1468         return bp - buf;
1469 }
1470
1471 gint sock_close(SockInfo *sock)
1472 {
1473         gint ret;
1474
1475         if (!sock)
1476                 return 0;
1477
1478         if (sock->sock_ch)
1479                 g_io_channel_unref(sock->sock_ch);
1480
1481 #ifdef USE_GNUTLS
1482         if (sock->ssl)
1483                 ssl_done_socket(sock);
1484         if (sock->g_source != 0 && g_main_context_find_source_by_id(NULL, sock->g_source) != NULL)
1485                 g_source_remove(sock->g_source);
1486         sock->g_source = 0;
1487 #endif
1488 #ifdef G_OS_WIN32
1489         shutdown(sock->sock, 1); /* complete transfer before close */
1490         ret = closesocket(sock->sock);
1491 #else
1492         ret = fd_close(sock->sock);
1493 #endif
1494
1495         g_free(sock->canonical_name);
1496         g_free(sock->hostname);
1497         g_free(sock);
1498
1499         return ret;
1500 }
1501
1502 gint fd_close(gint fd)
1503 {
1504         return close(fd);
1505 }