src/common/socket.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2009 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 #endif
  23
  24 #if (defined (_XOPEN_SOURCE) && !defined (_BSD_SOURCE))
  25 #define _BSD_SOURCE
  26 #endif
  27
  28 #include <glib.h>
  29 #include <glib/gi18n.h>
  30
  31 #include <sys/time.h>
  32 #include <sys/types.h>
  33 #ifdef G_OS_WIN32
  34 #  include <winsock2.h>
  35 #  ifndef EINPROGRESS
  36 #    define EINPROGRESS WSAEINPROGRESS
  37 #  endif
  38 #  include "w32lib.h"
  39 #else
  40 #  if HAVE_SYS_WAIT_H
  41 #    include <sys/wait.h>
  42 #  endif
  43 #  include <sys/socket.h>
  44 #  include <sys/stat.h>
  45 #  include <sys/un.h>
  46 #  include <netinet/in.h>
  47 #  include <arpa/inet.h>
  48 #  include <resolv.h>
  49 #  include <netdb.h>
  50 #endif /* G_OS_WIN32 */
  51 #include <unistd.h>
  52 #include <stdio.h>
  53 #include <string.h>
  54 #include <stdarg.h>
  55 #include <fcntl.h>
  56 #include <errno.h>
  57 #include <signal.h>
  58 #include <setjmp.h>
  59 #if HAVE_SYS_SELECT_H
  60 #  include <sys/select.h>
  61 #endif
  62
  63 #include "socket.h"
  64 #include "utils.h"
  65 #include "log.h"
  66 #ifdef USE_GNUTLS
  67 #  include "ssl.h"
  68 #endif
  69
  70 #if USE_GIO
  71 #error USE_GIO is currently not supported
  72 #endif
  73
  74 #if G_IO_WIN32
  75 #define BUFFSIZE        8191
  76 #else
  77 #define BUFFSIZE        8192
  78 #endif
  79
  80
  81 typedef gint (*SockAddrFunc)    (GList          *addr_list,
  82                                  gpointer        data);
  83
  84 typedef struct _SockConnectData SockConnectData;
  85 typedef struct _SockLookupData  SockLookupData;
  86 typedef struct _SockAddrData    SockAddrData;
  87 typedef struct _SockSource      SockSource;
  88
  89 struct _SockConnectData {
  90         gint id;
  91         gchar *hostname;
  92         gushort port;
  93         GList *addr_list;
  94         GList *cur_addr;
  95         SockLookupData *lookup_data;
  96         GIOChannel *channel;
  97         guint io_tag;
  98         SockConnectFunc func;
  99         gpointer data;
 100         gchar *canonical_name;
 101 };
 102
 103 struct _SockLookupData {
 104         gchar *hostname;
 105         pid_t child_pid;
 106         GIOChannel *channel;
 107         guint io_tag;
 108         SockAddrFunc func;
 109         gpointer data;
 110         gushort port;
 111         gint pipe_fds[2];
 112         gchar *canonical_name;
 113 };
 114
 115 struct _SockAddrData {
 116         gint family;
 117         gint socktype;
 118         gint protocol;
 119         gint addr_len;
 120         struct sockaddr *addr;
 121 };
 122
 123 struct _SockSource {
 124         GSource parent;
 125         SockInfo *sock;
 126 };
 127
 128 static guint io_timeout = 60;
 129
 130 static GList *sock_connect_data_list = NULL;
 131
 132 static gboolean sock_prepare            (GSource        *source,
 133                                          gint           *timeout);
 134 static gboolean sock_check              (GSource        *source);
 135 static gboolean sock_dispatch           (GSource        *source,
 136                                          GSourceFunc     callback,
 137                                          gpointer        user_data);
 138
 139 GSourceFuncs sock_watch_funcs = {
 140         sock_prepare,
 141         sock_check,
 142         sock_dispatch,
 143         NULL
 144 };
 145
 146 static gint sock_connect_with_timeout   (gint                    sock,
 147                                          const struct sockaddr  *serv_addr,
 148                                          gint                    addrlen,
 149                                          guint                   timeout_secs);
 150
 151 #ifndef INET6
 152 static gint sock_connect_by_hostname    (gint            sock,
 153                                          const gchar    *hostname,
 154                                          gushort         port);
 155 #else
 156 static gint sock_connect_by_getaddrinfo (const gchar    *hostname,
 157                                          gushort         port);
 158 #endif
 159
 160 static SockInfo *sockinfo_from_fd(const gchar *hostname,
 161                                   gushort port,
 162                                   gint sock);
 163 static void sock_address_list_free              (GList          *addr_list);
 164
 165 static gboolean sock_connect_async_cb           (GIOChannel     *source,
 166                                                  GIOCondition    condition,
 167                                                  gpointer        data);
 168 static gint sock_connect_async_get_address_info_cb
 169                                                 (GList          *addr_list,
 170                                                  gpointer        data);
 171
 172 static gint sock_connect_address_list_async     (SockConnectData *conn_data);
 173
 174 static gboolean sock_get_address_info_async_cb  (GIOChannel     *source,
 175                                                  GIOCondition    condition,
 176                                                  gpointer        data);
 177 static SockLookupData *sock_get_address_info_async
 178                                                 (const gchar    *hostname,
 179                                                  gushort         port,
 180                                                  SockAddrFunc    func,
 181                                                  gpointer        data);
 182 static gint sock_get_address_info_async_cancel  (SockLookupData *lookup_data);
 183
 184
 185 gint sock_init(void)
 186 {
 187 #ifdef G_OS_WIN32
 188         WSADATA wsadata;
 189         gint result;
 190
 191         result = WSAStartup(MAKEWORD(2, 2), &wsadata);
 192         if (result != NO_ERROR) {
 193                 g_warning("WSAStartup() failed\n");
 194                 return -1;
 195         }
 196 #endif
 197         return 0;
 198 }
 199
 200 gint sock_cleanup(void)
 201 {
 202 #ifdef G_OS_WIN32
 203         WSACleanup();
 204 #endif
 205         return 0;
 206 }
 207
 208 gint sock_set_io_timeout(guint sec)
 209 {
 210         io_timeout = sec;
 211         return 0;
 212 }
 213
 214 void refresh_resolvers(void)
 215 {
 216 #ifdef G_OS_UNIX
 217         static time_t resolv_conf_changed = (time_t)NULL;
 218         struct stat s;
 219
 220         /* This makes the glibc re-read resolv.conf, if it changed
 221          * since our startup. Maybe that should be #ifdef'ed, I don't
 222          * know if it'd work on BSDs.
 223          * Why doesn't the glibc do it by itself?
 224          */
 225         if (stat("/etc/resolv.conf", &s) == 0) {
 226                 if (s.st_mtime > resolv_conf_changed) {
 227                         resolv_conf_changed = s.st_mtime;
 228                         res_init();
 229                 }
 230         } /* else
 231                 we'll have bigger problems. */
 232 #endif /*G_OS_UNIX*/
 233 }
 234
 235 #ifdef G_OS_WIN32
 236 #define SOCKET_IS_VALID(s)      ((s) != INVALID_SOCKET)
 237 #else
 238 #define SOCKET_IS_VALID(s)      TRUE
 239 #endif
 240
 241 /* Due to the fact that socket under Windows are not represented by
 242    standard file descriptors, we sometimes need to check whether a
 243    given file descriptor is actually a socket.  This is done by
 244    testing for an error.  Returns true under W32 if FD is a socket. */
 245 static int fd_is_w32_socket(gint fd)
 246 {
 247 #ifdef G_OS_WIN32
 248         gint optval;
 249         gint retval = sizeof(optval);
 250
 251         return !getsockopt(fd, SOL_SOCKET, SO_TYPE, (char*)&optval, &retval);
 252 #else
 253         return 0;
 254 #endif
 255 }
 256
 257 gint fd_connect_inet(gushort port)
 258 {
 259         gint sock;
 260         struct sockaddr_in addr;
 261
 262         sock = socket(AF_INET, SOCK_STREAM, 0);
 263         if (!SOCKET_IS_VALID(sock)) {
 264 #ifdef G_OS_WIN32
 265                 debug_print("fd_connect_inet(): socket() failed: %d\n",
 266                           WSAGetLastError());
 267 #else
 268                 perror("fd_connect_inet(): socket");
 269 #endif
 270                 return -1;
 271         }
 272
 273         memset(&addr, 0, sizeof(addr));
 274         addr.sin_family = AF_INET;
 275         addr.sin_port = htons(port);
 276         addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 277
 278         if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 279                 fd_close(sock);
 280                 return -1;
 281         }
 282
 283         return sock;
 284 }
 285 gint fd_open_inet(gushort port)
 286 {
 287         gint sock;
 288         struct sockaddr_in addr;
 289         gint val;
 290
 291         sock = socket(AF_INET, SOCK_STREAM, 0);
 292         if (!SOCKET_IS_VALID(sock)) {
 293 #ifdef G_OS_WIN32
 294                 g_warning("fd_open_inet(): socket() failed: %d\n",
 295                           WSAGetLastError());
 296 #else
 297                 perror("fd_open_inet(): socket");
 298 #endif
 299                 return -1;
 300         }
 301
 302         val = 1;
 303         if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *)&val,
 304                        sizeof(val)) < 0) {
 305                 perror("setsockopt");
 306                 fd_close(sock);
 307                 return -1;
 308         }
 309
 310         memset(&addr, 0, sizeof(addr));
 311         addr.sin_family = AF_INET;
 312         addr.sin_port = htons(port);
 313         addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 314
 315         if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 316                 perror("bind");
 317                 fd_close(sock);
 318                 return -1;
 319         }
 320
 321         if (listen(sock, 1) < 0) {
 322                 perror("listen");
 323                 fd_close(sock);
 324                 return -1;
 325         }
 326
 327         return sock;
 328 }
 329
 330 gint fd_connect_unix(const gchar *path)
 331 {
 332 #ifdef G_OS_UNIX
 333         gint sock;
 334         struct sockaddr_un addr;
 335
 336         sock = socket(PF_UNIX, SOCK_STREAM, 0);
 337         if (sock < 0) {
 338                 perror("sock_connect_unix(): socket");
 339                 return -1;
 340         }
 341
 342         memset(&addr, 0, sizeof(addr));
 343         addr.sun_family = AF_UNIX;
 344         strncpy(addr.sun_path, path, sizeof(addr.sun_path) - 1);
 345
 346         if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 347                 close(sock);
 348                 return -1;
 349         }
 350
 351         return sock;
 352 #else
 353         return -1;
 354 #endif
 355 }
 356
 357 gint fd_open_unix(const gchar *path)
 358 {
 359 #ifdef G_OS_UNIX
 360         gint sock;
 361         struct sockaddr_un addr;
 362
 363         sock = socket(PF_UNIX, SOCK_STREAM, 0);
 364
 365         if (sock < 0) {
 366                 perror("sock_open_unix(): socket");
 367                 return -1;
 368         }
 369
 370         memset(&addr, 0, sizeof(addr));
 371         addr.sun_family = AF_UNIX;
 372         strncpy(addr.sun_path, path, sizeof(addr.sun_path) - 1);
 373
 374         if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 375                 gchar *buf = g_strdup_printf("can't bind to %s", path);
 376                 perror(buf);
 377                 g_free(buf);
 378                 close(sock);
 379                 return -1;
 380         }
 381
 382         if (listen(sock, 1) < 0) {
 383                 gchar *buf = g_strdup_printf("can't listen on %s", path);
 384                 perror(buf);
 385                 g_free(buf);
 386                 close(sock);
 387                 return -1;
 388         }
 389
 390         return sock;
 391 #else
 392         return -1;
 393 #endif
 394 }
 395
 396 gint fd_accept(gint sock)
 397 {
 398         struct sockaddr_in caddr;
 399         guint caddr_len;
 400
 401         caddr_len = sizeof(caddr);
 402         return accept(sock, (struct sockaddr *)&caddr, &caddr_len);
 403 }
 404
 405
 406 static gint set_nonblocking_mode(gint fd, gboolean nonblock)
 407 {
 408 #ifdef G_OS_UNIX
 409         gint flags;
 410
 411         flags = fcntl(fd, F_GETFL, 0);
 412         if (flags < 0) {
 413                 perror("fcntl");
 414                 return -1;
 415         }
 416
 417         if (nonblock)
 418                 flags |= O_NONBLOCK;
 419         else
 420                 flags &= ~O_NONBLOCK;
 421
 422         return fcntl(fd, F_SETFL, flags);
 423 #else
 424         return -1;
 425 #endif
 426 }
 427
 428 gint sock_set_nonblocking_mode(SockInfo *sock, gboolean nonblock)
 429 {
 430         cm_return_val_if_fail(sock != NULL, -1);
 431
 432         return set_nonblocking_mode(sock->sock, nonblock);
 433 }
 434
 435 static gboolean is_nonblocking_mode(gint fd)
 436 {
 437 #ifdef G_OS_UNIX
 438         gint flags;
 439
 440         flags = fcntl(fd, F_GETFL, 0);
 441         if (flags < 0) {
 442                 perror("fcntl");
 443                 return FALSE;
 444         }
 445
 446         return ((flags & O_NONBLOCK) != 0);
 447 #else
 448         return FALSE;
 449 #endif
 450 }
 451
 452 gboolean sock_is_nonblocking_mode(SockInfo *sock)
 453 {
 454         cm_return_val_if_fail(sock != NULL, FALSE);
 455
 456         return is_nonblocking_mode(sock->sock);
 457 }
 458
 459
 460 static gboolean sock_prepare(GSource *source, gint *timeout)
 461 {
 462         *timeout = 1;
 463         return FALSE;
 464 }
 465
 466 static gboolean 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         FD_ZERO(&fds);
 479         FD_SET(sock->sock, &fds);
 480
 481         select(sock->sock + 1,
 482                (condition & G_IO_IN)  ? &fds : NULL,
 483                (condition & G_IO_OUT) ? &fds : NULL,
 484                NULL, &timeout);
 485
 486         return FD_ISSET(sock->sock, &fds) != 0;
 487 }
 488
 489 static gboolean sock_dispatch(GSource *source, GSourceFunc callback,
 490                               gpointer user_data)
 491 {
 492         SockInfo *sock = ((SockSource *)source)->sock;
 493
 494         if (!sock || !sock->callback || !sock->data)
 495                 return FALSE;
 496
 497         return sock->callback(sock, sock->condition, sock->data);
 498 }
 499
 500 static gboolean sock_watch_cb(GIOChannel *source, GIOCondition condition,
 501                               gpointer data)
 502 {
 503         SockInfo *sock = (SockInfo *)data;
 504
 505         if ((condition & sock->condition) == 0)
 506                 return TRUE;
 507
 508         return sock->callback(sock, sock->condition, sock->data);
 509 }
 510
 511 guint sock_add_watch(SockInfo *sock, GIOCondition condition, SockFunc func,
 512                      gpointer data)
 513 {
 514         if (!sock)
 515                 return FALSE;
 516
 517         sock->callback = func;
 518         sock->condition = condition;
 519         sock->data = data;
 520
 521 #ifdef USE_GNUTLS
 522         if (sock->ssl)
 523         {
 524                 GSource *source = g_source_new(&sock_watch_funcs,
 525                                                sizeof(SockSource));
 526                 ((SockSource *) source)->sock = sock;
 527                 g_source_set_priority(source, G_PRIORITY_DEFAULT);
 528                 g_source_set_can_recurse(source, FALSE);
 529                 sock->g_source = g_source_attach(source, NULL);
 530                 g_source_unref (source); /* Refcount back down to 1 */
 531                 return sock->g_source;
 532         }
 533 #endif
 534
 535         return g_io_add_watch(sock->sock_ch, condition, sock_watch_cb, sock);
 536 }
 537
 538 static gint fd_check_io(gint fd, GIOCondition cond)
 539 {
 540         struct timeval timeout;
 541         fd_set fds;
 542
 543         if (is_nonblocking_mode(fd))
 544                 return 0;
 545
 546         timeout.tv_sec  = io_timeout;
 547         timeout.tv_usec = 0;
 548
 549         FD_ZERO(&fds);
 550         FD_SET(fd, &fds);
 551
 552         if (cond == G_IO_IN) {
 553                 select(fd + 1, &fds, NULL, NULL,
 554                        io_timeout > 0 ? &timeout : NULL);
 555         } else {
 556                 select(fd + 1, NULL, &fds, NULL,
 557                        io_timeout > 0 ? &timeout : NULL);
 558         }
 559
 560         if (FD_ISSET(fd, &fds)) {
 561                 return 0;
 562         } else {
 563                 g_warning("Socket IO timeout\n");
 564                 return -1;
 565         }
 566 }
 567
 568 #ifdef G_OS_UNIX
 569 static sigjmp_buf jmpenv;
 570
 571 static void timeout_handler(gint sig)
 572 {
 573         siglongjmp(jmpenv, 1);
 574 }
 575 #endif /*G_OS_UNIX*/
 576
 577 static gint sock_connect_with_timeout(gint sock,
 578                                       const struct sockaddr *serv_addr,
 579                                       gint addrlen,
 580                                       guint timeout_secs)
 581 {
 582         gint ret;
 583 #ifdef G_OS_UNIX
 584         void (*prev_handler)(gint);
 585
 586         alarm(0);
 587         prev_handler = signal(SIGALRM, timeout_handler);
 588         if (sigsetjmp(jmpenv, 1)) {
 589                 alarm(0);
 590                 signal(SIGALRM, prev_handler);
 591                 errno = ETIMEDOUT;
 592                 return -1;
 593         }
 594         alarm(timeout_secs);
 595 #endif
 596
 597         ret = connect(sock, serv_addr, addrlen);
 598
 599 #ifdef G_OS_UNIX
 600         alarm(0);
 601         signal(SIGALRM, prev_handler);
 602 #endif
 603
 604         return ret;
 605 }
 606
 607 struct hostent *my_gethostbyname(const gchar *hostname)
 608 {
 609         struct hostent *hp;
 610 #ifdef G_OS_UNIX
 611         void (*prev_handler)(gint);
 612
 613         alarm(0);
 614         prev_handler = signal(SIGALRM, timeout_handler);
 615         if (sigsetjmp(jmpenv, 1)) {
 616                 alarm(0);
 617                 signal(SIGALRM, prev_handler);
 618                 g_printerr("%s: host lookup timed out.\n", hostname);
 619                 errno = 0;
 620                 return NULL;
 621         }
 622         alarm(io_timeout);
 623 #endif
 624
 625         if ((hp = gethostbyname(hostname)) == NULL) {
 626 #ifdef G_OS_UNIX
 627                 alarm(0);
 628                 signal(SIGALRM, prev_handler);
 629 #endif
 630                 g_printerr("%s: unknown host.\n", hostname);
 631                 errno = 0;
 632                 return NULL;
 633         }
 634
 635 #ifdef G_OS_UNIX
 636         alarm(0);
 637         signal(SIGALRM, prev_handler);
 638 #endif
 639
 640         return hp;
 641 }
 642
 643 #ifndef INET6
 644 static gint my_inet_aton(const gchar *hostname, struct in_addr *inp)
 645 {
 646 #if HAVE_INET_ATON
 647         return inet_aton(hostname, inp);
 648 #else
 649 #if HAVE_INET_ADDR
 650         guint32 inaddr;
 651
 652         inaddr = inet_addr(hostname);
 653         if (inaddr != -1) {
 654                 memcpy(inp, &inaddr, sizeof(inaddr));
 655                 return 1;
 656         } else
 657                 return 0;
 658 #else
 659         return 0;
 660 #endif
 661 #endif /* HAVE_INET_ATON */
 662 }
 663
 664 static gint sock_connect_by_hostname(gint sock, const gchar *hostname,
 665                                      gushort port)
 666 {
 667         struct hostent *hp;
 668         struct sockaddr_in ad;
 669
 670         memset(&ad, 0, sizeof(ad));
 671         ad.sin_family = AF_INET;
 672         ad.sin_port = htons(port);
 673
 674         refresh_resolvers();
 675
 676         if (!my_inet_aton(hostname, &ad.sin_addr)) {
 677                 if ((hp = my_gethostbyname(hostname)) == NULL) {
 678                         g_printerr("%s: unknown host.\n", hostname);
 679                         errno = 0;
 680                         return -1;
 681                 }
 682
 683                 if (hp->h_length != 4 && hp->h_length != 8) {
 684                         g_printerr("illegal address length received for host %s\n", hostname);
 685                         errno = 0;
 686                         return -1;
 687                 }
 688
 689                 memcpy(&ad.sin_addr, hp->h_addr, hp->h_length);
 690         }
 691
 692         return sock_connect_with_timeout(sock, (struct sockaddr *)&ad,
 693                                          sizeof(ad), io_timeout);
 694 }
 695
 696 #else /* INET6 */
 697 static gint sock_connect_by_getaddrinfo(const gchar *hostname, gushort  port)
 698 {
 699         gint sock = -1, gai_error;
 700         struct addrinfo hints, *res, *ai;
 701         gchar port_str[6];
 702
 703         refresh_resolvers();
 704
 705         memset(&hints, 0, sizeof(hints));
 706         /* hints.ai_flags = AI_CANONNAME; */
 707         hints.ai_family = AF_UNSPEC;
 708         hints.ai_socktype = SOCK_STREAM;
 709         hints.ai_protocol = IPPROTO_TCP;
 710
 711         /* convert port from integer to string. */
 712         g_snprintf(port_str, sizeof(port_str), "%d", port);
 713
 714         if ((gai_error = getaddrinfo(hostname, port_str, &hints, &res)) != 0) {
 715                 g_printerr("getaddrinfo for %s:%s failed: %s\n",
 716                         hostname, port_str, gai_strerror(gai_error));
 717                 return -1;
 718         }
 719
 720         for (ai = res; ai != NULL; ai = ai->ai_next) {
 721                 sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
 722                 if (sock < 0)
 723                         continue;
 724
 725                 if (sock_connect_with_timeout
 726                         (sock, ai->ai_addr, ai->ai_addrlen, io_timeout) == 0)
 727                         break;
 728
 729                 close(sock);
 730         }
 731
 732         if (res != NULL)
 733                 freeaddrinfo(res);
 734
 735         if (ai == NULL)
 736                 return -1;
 737
 738         return sock;
 739 }
 740 #endif /* !INET6 */
 741
 742 SockInfo *sock_connect(const gchar *hostname, gushort port)
 743 {
 744 #ifdef G_OS_WIN32
 745         SOCKET sock;
 746 #else
 747         gint sock;
 748 #endif
 749
 750 #ifdef INET6
 751         if ((sock = sock_connect_by_getaddrinfo(hostname, port)) < 0)
 752                 return NULL;
 753 #else
 754 #ifdef G_OS_WIN32
 755         if ((sock = socket(AF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) {
 756                 g_warning("socket() failed: %d\n", WSAGetLastError());
 757 #else
 758         if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
 759                 perror("socket");
 760 #endif /* G_OS_WIN32 */
 761                 return NULL;
 762         }
 763
 764         if (sock_connect_by_hostname(sock, hostname, port) < 0) {
 765                 if (errno != 0) perror("connect");
 766                 close(sock);
 767                 return NULL;
 768         }
 769 #endif /* INET6 */
 770
 771         return sockinfo_from_fd(hostname, port, sock);
 772 }
 773
 774
 775 static void sock_address_list_free(GList *addr_list)
 776 {
 777         GList *cur;
 778
 779         for (cur = addr_list; cur != NULL; cur = cur->next) {
 780                 SockAddrData *addr_data = (SockAddrData *)cur->data;
 781                 g_free(addr_data->addr);
 782                 g_free(addr_data);
 783         }
 784
 785         g_list_free(addr_list);
 786 }
 787
 788 /* asynchronous TCP connection */
 789
 790 static gboolean sock_connect_async_cb(GIOChannel *source,
 791                                       GIOCondition condition, gpointer data)
 792 {
 793         SockConnectData *conn_data = (SockConnectData *)data;
 794         gint fd;
 795         gint val;
 796         guint len;
 797         SockInfo *sockinfo;
 798
 799         if (conn_data->io_tag == 0 && conn_data->channel == NULL)
 800                 return FALSE;
 801
 802         fd = g_io_channel_unix_get_fd(source);
 803
 804         conn_data->io_tag = 0;
 805         conn_data->channel = NULL;
 806         g_io_channel_unref(source);
 807
 808         len = sizeof(val);
 809         if (getsockopt(fd, SOL_SOCKET, SO_ERROR, &val, &len) < 0) {
 810                 perror("getsockopt");
 811                 close(fd);
 812                 sock_connect_address_list_async(conn_data);
 813                 return FALSE;
 814         }
 815
 816         if (val != 0) {
 817                 close(fd);
 818                 sock_connect_address_list_async(conn_data);
 819                 return FALSE;
 820         }
 821
 822         sockinfo = g_new0(SockInfo, 1);
 823         sockinfo->sock = fd;
 824 #ifndef G_OS_WIN32
 825         sockinfo->sock_ch = g_io_channel_unix_new(fd);
 826 #else
 827         sockinfo->sock_ch = g_io_channel_win32_new_socket(fd);
 828 #endif
 829         sockinfo->hostname = g_strdup(conn_data->hostname);
 830         sockinfo->port = conn_data->port;
 831         sockinfo->state = CONN_ESTABLISHED;
 832         sockinfo->canonical_name = g_strdup(conn_data->canonical_name);
 833
 834         conn_data->func(sockinfo, conn_data->data);
 835
 836         sock_connect_async_cancel(conn_data->id);
 837
 838         return FALSE;
 839 }
 840
 841 static gint sock_connect_async_get_address_info_cb(GList *addr_list,
 842                                                    gpointer data)
 843 {
 844         SockConnectData *conn_data = (SockConnectData *)data;
 845
 846         conn_data->addr_list = addr_list;
 847         conn_data->cur_addr = addr_list;
 848         if (conn_data->lookup_data) {
 849                 conn_data->canonical_name = conn_data->lookup_data->canonical_name;
 850                 conn_data->lookup_data->canonical_name = NULL;
 851                 conn_data->lookup_data = NULL;
 852         }
 853         return sock_connect_address_list_async(conn_data);
 854 }
 855
 856 gint sock_connect_async(const gchar *hostname, gushort port,
 857                         SockConnectFunc func, gpointer data)
 858 {
 859         static gint id = 1;
 860         SockConnectData *conn_data;
 861
 862         conn_data = g_new0(SockConnectData, 1);
 863         conn_data->id = id++;
 864         conn_data->hostname = g_strdup(hostname);
 865         conn_data->port = port;
 866         conn_data->addr_list = NULL;
 867         conn_data->cur_addr = NULL;
 868         conn_data->io_tag = 0;
 869         conn_data->func = func;
 870         conn_data->data = data;
 871
 872         conn_data->lookup_data = sock_get_address_info_async
 873                 (hostname, port, sock_connect_async_get_address_info_cb,
 874                  conn_data);
 875
 876         if (conn_data->lookup_data == NULL) {
 877                 g_free(conn_data->hostname);
 878                 g_free(conn_data);
 879                 return -1;
 880         }
 881
 882         sock_connect_data_list = g_list_append(sock_connect_data_list,
 883                                                conn_data);
 884
 885         return conn_data->id;
 886 }
 887
 888 gint sock_connect_async_cancel(gint id)
 889 {
 890         SockConnectData *conn_data = NULL;
 891         GList *cur;
 892
 893         for (cur = sock_connect_data_list; cur != NULL; cur = cur->next) {
 894                 if (((SockConnectData *)cur->data)->id == id) {
 895                         conn_data = (SockConnectData *)cur->data;
 896                         break;
 897                 }
 898         }
 899
 900         if (conn_data) {
 901                 sock_connect_data_list = g_list_remove(sock_connect_data_list,
 902                                                        conn_data);
 903
 904                 if (conn_data->lookup_data)
 905                         sock_get_address_info_async_cancel
 906                                 (conn_data->lookup_data);
 907
 908                 if (conn_data->io_tag > 0)
 909                         g_source_remove(conn_data->io_tag);
 910                 if (conn_data->channel) {
 911                         GError *err = NULL;
 912                         g_io_channel_shutdown(conn_data->channel, TRUE, &err);
 913                         if (err)
 914                                 g_error_free(err);
 915                         g_io_channel_unref(conn_data->channel);
 916                 }
 917
 918                 sock_address_list_free(conn_data->addr_list);
 919                 g_free(conn_data->canonical_name);
 920                 g_free(conn_data->hostname);
 921                 g_free(conn_data);
 922         } else {
 923                 g_warning("sock_connect_async_cancel: id %d not found.\n", id);
 924                 return -1;
 925         }
 926
 927         return 0;
 928 }
 929
 930 static gint sock_connect_address_list_async(SockConnectData *conn_data)
 931 {
 932         SockAddrData *addr_data;
 933         gint sock = -1;
 934
 935         for (; conn_data->cur_addr != NULL;
 936              conn_data->cur_addr = conn_data->cur_addr->next) {
 937                 addr_data = (SockAddrData *)conn_data->cur_addr->data;
 938
 939                 if ((sock = socket(addr_data->family, addr_data->socktype,
 940                                    addr_data->protocol)) < 0) {
 941                         perror("socket");
 942                         continue;
 943                 }
 944
 945                 set_nonblocking_mode(sock, TRUE);
 946
 947                 if (connect(sock, addr_data->addr, addr_data->addr_len) < 0) {
 948                         if (EINPROGRESS == errno) {
 949                                 break;
 950                         } else {
 951                                 perror("connect");
 952                                 close(sock);
 953                         }
 954                 } else
 955                         break;
 956         }
 957
 958         if (conn_data->cur_addr == NULL) {
 959                 g_warning("sock_connect_address_list_async: "
 960                           "connection to %s:%d failed\n",
 961                           conn_data->hostname, conn_data->port);
 962                 conn_data->func(NULL, conn_data->data);
 963                 sock_connect_async_cancel(conn_data->id);
 964                 return -1;
 965         }
 966
 967         conn_data->cur_addr = conn_data->cur_addr->next;
 968
 969 #ifndef G_OS_WIN32
 970         conn_data->channel = g_io_channel_unix_new(sock);
 971 #else
 972         conn_data->channel = g_io_channel_win32_new_socket(sock);
 973 #endif
 974         conn_data->io_tag = g_io_add_watch(conn_data->channel, G_IO_IN|G_IO_OUT,
 975                                            sock_connect_async_cb, conn_data);
 976
 977         return 0;
 978 }
 979
 980 /* asynchronous DNS lookup */
 981
 982 static gboolean sock_get_address_info_async_cb(GIOChannel *source,
 983                                                GIOCondition condition,
 984                                                gpointer data)
 985 {
 986         SockLookupData *lookup_data = (SockLookupData *)data;
 987         GList *addr_list = NULL;
 988         SockAddrData *addr_data;
 989         gsize bytes_read;
 990         gint ai_member[4];
 991         struct sockaddr *addr;
 992         gchar *canonical_name = NULL;
 993         gchar len = 0;
 994         GError *err = NULL;
 995
 996         g_io_channel_set_encoding(source, NULL, &err);
 997         if (err) {
 998                 g_warning("can unset encoding: %s\n", err->message);
 999                 g_error_free(err);
1000                 return FALSE;
1001         }
1002         g_io_channel_set_buffered(source, FALSE);
1003         if (g_io_channel_read_chars(source, &len, sizeof(len),
1004                               &bytes_read, &err) == G_IO_STATUS_NORMAL) {
1005                 if (err != NULL) {
1006                         g_warning("g_io_channel_read_chars: %s\n", err->message);
1007                         g_error_free(err);
1008                         return FALSE;
1009                 }
1010                 if (bytes_read == sizeof(len) && len > 0) {
1011                         gchar *cur = NULL;
1012                         gint todo = len;
1013                         canonical_name = g_malloc0(len + 1);
1014                         cur = canonical_name;
1015                         while (todo > 0) {
1016                                 if (g_io_channel_read_chars(source, cur, todo,
1017                                       &bytes_read, &err) != G_IO_STATUS_NORMAL) {
1018                                         if (err) {
1019                                               g_warning("canonical name not read %s\n", err->message);
1020                                               g_free(canonical_name);
1021                                               canonical_name = NULL;
1022                                               g_error_free(err);
1023                                               err = NULL;
1024                                               break;
1025                                         }
1026                                 } else {
1027                                         cur += bytes_read;
1028                                         todo -= bytes_read;
1029                                 }
1030                                 if (bytes_read == 0) {
1031                                       g_warning("canonical name not read\n");
1032                                       g_free(canonical_name);
1033                                       canonical_name = NULL;
1034                                       break;
1035                                 }
1036                         }
1037                 }
1038         }
1039         for (;;) {
1040                 if (g_io_channel_read_chars(source, (gchar *)ai_member,
1041                                       sizeof(ai_member), &bytes_read, &err)
1042                     != G_IO_STATUS_NORMAL) {
1043                         if (err != NULL) {
1044                                 g_warning("g_io_channel_read_chars: addr len %s\n", err->message);
1045                                 g_error_free(err);
1046                                 err = NULL;
1047                                 break;
1048                         }
1049                 }
1050
1051                 if (bytes_read == 0 || bytes_read != sizeof(ai_member))
1052                         break;
1053
1054                 if (ai_member[0] == AF_UNSPEC) {
1055                         g_warning("DNS lookup failed\n");
1056                         break;
1057                 }
1058
1059                 addr = g_malloc(ai_member[3]);
1060                 if (g_io_channel_read_chars(source, (gchar *)addr, ai_member[3],
1061                                       &bytes_read, &err)
1062                     != G_IO_STATUS_NORMAL) {
1063                         if (err != NULL) {
1064                                 g_warning("g_io_channel_read_chars: addr data read %s\n", err->message);
1065                                 g_error_free(err);
1066                                 err = NULL;
1067                                 g_free(addr);
1068                                 break;
1069                         }
1070                 }
1071
1072                 if (bytes_read != ai_member[3]) {
1073                         g_warning("sock_get_address_info_async_cb: "
1074                                   "incomplete address data\n");
1075                         g_free(addr);
1076                         break;
1077                 }
1078
1079                 addr_data = g_new0(SockAddrData, 1);
1080                 addr_data->family = ai_member[0];
1081                 addr_data->socktype = ai_member[1];
1082                 addr_data->protocol = ai_member[2];
1083                 addr_data->addr_len = ai_member[3];
1084                 addr_data->addr = addr;
1085
1086                 addr_list = g_list_append(addr_list, addr_data);
1087         }
1088
1089         g_io_channel_shutdown(source, TRUE, &err);
1090         if (err)
1091                 g_error_free(err);
1092         g_io_channel_unref(source);
1093
1094 #ifdef G_OS_WIN32
1095         /* FIXME: We would need to cancel the thread. */
1096 #else
1097         kill(lookup_data->child_pid, SIGKILL);
1098         waitpid(lookup_data->child_pid, NULL, 0);
1099 #endif
1100         lookup_data->canonical_name = canonical_name;
1101
1102         lookup_data->func(addr_list, lookup_data->data);
1103
1104         g_free(lookup_data->canonical_name);
1105         g_free(lookup_data->hostname);
1106         g_free(lookup_data);
1107
1108         return FALSE;
1109 }
1110
1111
1112 /* For better readability we use a separate function to implement the
1113    child code of sock_get_address_info_async.  Note, that under W32
1114    this is actually not a child but a thread and this is the reason
1115    why we pass only a void pointer. */
1116 static void address_info_async_child(void *opaque)
1117 {
1118         SockLookupData *parm = opaque;
1119 #ifdef INET6
1120         gint gai_err;
1121         struct addrinfo hints, *res, *ai;
1122         gchar port_str[6];
1123 #else /* !INET6 */
1124         struct hostent *hp;
1125         gchar **addr_list_p;
1126         struct sockaddr_in ad;
1127 #endif /* INET6 */
1128         gint ai_member[4] = {AF_UNSPEC, 0, 0, 0};
1129
1130 #ifndef G_OS_WIN32
1131         close(parm->pipe_fds[0]);
1132         parm->pipe_fds[0] = -1;
1133 #endif
1134
1135 #ifdef INET6
1136         memset(&hints, 0, sizeof(hints));
1137         hints.ai_flags = AI_CANONNAME;
1138         hints.ai_family = AF_UNSPEC;
1139         hints.ai_socktype = SOCK_STREAM;
1140         hints.ai_protocol = IPPROTO_TCP;
1141
1142         g_snprintf(port_str, sizeof(port_str), "%d", parm->port);
1143
1144         gai_err = getaddrinfo(parm->hostname, port_str, &hints, &res);
1145         if (gai_err != 0) {
1146                 gchar len = 0;
1147                 g_warning("getaddrinfo for %s:%s failed: %s\n",
1148                           parm->hostname, port_str, gai_strerror(gai_err));
1149                 fd_write_all(parm->pipe_fds[1], &len,
1150                      sizeof(len));
1151                 fd_write_all(parm->pipe_fds[1], (gchar *)ai_member,
1152                              sizeof(ai_member));
1153                 close(parm->pipe_fds[1]);
1154                 parm->pipe_fds[1] = -1;
1155 #ifdef G_OS_WIN32
1156                 _endthread();
1157 #else
1158                 _exit(1);
1159 #endif
1160         }
1161
1162         if (res != NULL) {
1163                 if (res->ai_canonname && strlen(res->ai_canonname) < 255) {
1164                         gchar len = strlen(res->ai_canonname);
1165                         fd_write_all(parm->pipe_fds[1], &len,
1166                              sizeof(len));
1167                         fd_write_all(parm->pipe_fds[1], res->ai_canonname,
1168                              len);
1169                 } else {
1170                         gchar len = 0;
1171                         fd_write_all(parm->pipe_fds[1], &len,
1172                              sizeof(len));
1173                 }
1174         } else {
1175                 gchar len = 0;
1176                 fd_write_all(parm->pipe_fds[1], &len,
1177                      sizeof(len));
1178         }
1179
1180         for (ai = res; ai != NULL; ai = ai->ai_next) {
1181                 ai_member[0] = ai->ai_family;
1182                 ai_member[1] = ai->ai_socktype;
1183                 ai_member[2] = ai->ai_protocol;
1184                 ai_member[3] = ai->ai_addrlen;
1185
1186                 fd_write_all(parm->pipe_fds[1], (gchar *)ai_member,
1187                              sizeof(ai_member));
1188                 fd_write_all(parm->pipe_fds[1], (gchar *)ai->ai_addr,
1189                              ai->ai_addrlen);
1190         }
1191
1192         if (res != NULL)
1193                 freeaddrinfo(res);
1194 #else /* !INET6 */
1195         hp = my_gethostbyname(parm->hostname);
1196         if (hp == NULL || hp->h_addrtype != AF_INET) {
1197                 gchar len = 0;
1198                 fd_write_all(parm->pipe_fds[1], &len,
1199                      sizeof(len));
1200                 fd_write_all(parm->pipe_fds[1], (gchar *)ai_member,
1201                              sizeof(ai_member));
1202                close(parm->pipe_fds[1]);
1203                 parm->pipe_fds[1] = -1;
1204 #ifdef G_OS_WIN32
1205                 _endthread();
1206 #else
1207                 _exit(1);
1208 #endif
1209         }
1210
1211         ai_member[0] = AF_INET;
1212         ai_member[1] = SOCK_STREAM;
1213         ai_member[2] = IPPROTO_TCP;
1214         ai_member[3] = sizeof(ad);
1215
1216         memset(&ad, 0, sizeof(ad));
1217         ad.sin_family = AF_INET;
1218         ad.sin_port = htons(parm->port);
1219
1220         if (hp->h_name && strlen(hp->h_name) < 255) {
1221                 gchar len = strlen(hp->h_name);
1222                 fd_write_all(parm->pipe_fds[1], &len,
1223                      sizeof(len));
1224                 fd_write_all(parm->pipe_fds[1], hp->h_name,
1225                      len);
1226         } else {
1227                 gchar len = 0;
1228                 fd_write_all(parm->pipe_fds[1], &len,
1229                      sizeof(len));
1230         }
1231         for (addr_list_p = hp->h_addr_list; *addr_list_p != NULL;
1232              addr_list_p++) {
1233                 memcpy(&ad.sin_addr, *addr_list_p, hp->h_length);
1234                 fd_write_all(parm->pipe_fds[1], (gchar *)ai_member,
1235                              sizeof(ai_member));
1236                 fd_write_all(parm->pipe_fds[1], (gchar *)&ad, sizeof(ad));
1237         }
1238 #endif /* INET6 */
1239
1240         close(parm->pipe_fds[1]);
1241         parm->pipe_fds[1] = -1;
1242
1243 #ifdef G_OS_WIN32
1244         _endthread();
1245 #else
1246         _exit(0);
1247 #endif
1248 }
1249
1250 static SockLookupData *sock_get_address_info_async(const gchar *hostname,
1251                                                    gushort port,
1252                                                    SockAddrFunc func,
1253                                                    gpointer data)
1254 {
1255         SockLookupData *lookup_data = NULL;
1256
1257         refresh_resolvers();
1258
1259         lookup_data = g_new0(SockLookupData, 1);
1260         lookup_data->hostname = g_strdup(hostname);
1261         lookup_data->func = func;
1262         lookup_data->data = data;
1263         lookup_data->port = port;
1264         lookup_data->child_pid = (pid_t)(-1);
1265         lookup_data->pipe_fds[0] = -1;
1266         lookup_data->pipe_fds[1] = -1;
1267
1268         if (pipe(lookup_data->pipe_fds) < 0) {
1269                 perror("pipe");
1270                 func(NULL, data);
1271                 g_free (lookup_data->hostname);
1272                 g_free (lookup_data);
1273                 return NULL;
1274         }
1275
1276 #ifndef G_OS_WIN32
1277         if ((lookup_data->child_pid = fork()) < 0) {
1278                 perror("fork");
1279                 func(NULL, data);
1280                 g_free (lookup_data->hostname);
1281                 g_free (lookup_data);
1282                 return NULL;
1283         }
1284
1285         if (lookup_data->child_pid == 0) {
1286                 /* Child process. */
1287                 address_info_async_child (lookup_data);
1288                 g_assert_not_reached ();
1289         }
1290         /* Parent process. */
1291         close(lookup_data->pipe_fds[1]);
1292         lookup_data->pipe_fds[1] = -1;
1293 #endif  /*!G_OS_WIN32 */
1294
1295 #ifndef G_OS_WIN32
1296         lookup_data->channel = g_io_channel_unix_new(lookup_data->pipe_fds[0]);
1297 #else
1298         lookup_data->channel = g_io_channel_win32_new_fd(lookup_data->pipe_fds[0]);
1299 #endif
1300         lookup_data->io_tag = g_io_add_watch(lookup_data->channel, G_IO_IN,
1301                                              sock_get_address_info_async_cb,
1302                                              lookup_data);
1303 #ifdef G_OS_WIN32
1304         lookup_data->child_pid = _beginthread(
1305                 address_info_async_child, 0, lookup_data);
1306 #endif
1307
1308         return lookup_data;
1309 }
1310
1311 static gint sock_get_address_info_async_cancel(SockLookupData *lookup_data)
1312 {
1313         if (lookup_data->io_tag > 0)
1314                 g_source_remove(lookup_data->io_tag);
1315         if (lookup_data->channel) {
1316                 GError *err = NULL;
1317                 g_io_channel_shutdown(lookup_data->channel, TRUE, &err);
1318                 if (err)
1319                         g_error_free(err);
1320
1321                 g_io_channel_unref(lookup_data->channel);
1322         }
1323
1324         if (lookup_data->child_pid > 0) {
1325 #ifdef G_OS_WIN32
1326                 /* FIXME: Need a way to cancel the thread. */
1327 #else
1328                 kill(lookup_data->child_pid, SIGKILL);
1329                 waitpid(lookup_data->child_pid, NULL, 0);
1330 #endif
1331         }
1332
1333         g_free(lookup_data->canonical_name);
1334         g_free(lookup_data->hostname);
1335         g_free(lookup_data);
1336
1337         return 0;
1338 }
1339
1340
1341 static SockInfo *sockinfo_from_fd(const gchar *hostname,
1342                                   gushort port,
1343                                   gint sock)
1344 {
1345         SockInfo *sockinfo;
1346
1347         sockinfo = g_new0(SockInfo, 1);
1348         sockinfo->sock = sock;
1349 #ifndef G_OS_WIN32
1350         sockinfo->sock_ch = g_io_channel_unix_new(sock);
1351 #else
1352         sockinfo->sock_ch = g_io_channel_win32_new_socket(sock);
1353 #endif
1354         sockinfo->hostname = g_strdup(hostname);
1355         sockinfo->port = port;
1356         sockinfo->state = CONN_ESTABLISHED;
1357
1358         return sockinfo;
1359 }
1360
1361 static gint fd_read(gint fd, gchar *buf, gint len)
1362 {
1363         if (fd_check_io(fd, G_IO_IN) < 0)
1364                 return -1;
1365
1366         if (fd_is_w32_socket(fd))
1367                 return recv(fd, buf, len, 0);
1368         return read(fd, buf, len);
1369 }
1370
1371 #if USE_GNUTLS
1372 static gint ssl_read(gnutls_session ssl, gchar *buf, gint len)
1373 {
1374         gint r;
1375
1376         if (gnutls_record_check_pending(ssl) == 0) {
1377                 if (fd_check_io(GPOINTER_TO_INT(gnutls_transport_get_ptr(ssl)), G_IO_IN) < 0)
1378                         return -1;
1379         }
1380
1381         while (1) {
1382                 r = gnutls_record_recv(ssl, buf, len);
1383                 if (r > 0)
1384                         return r;
1385
1386                 switch (r) {
1387                 case 0: /* closed connection */
1388                         return -1;
1389
1390                 case GNUTLS_E_REHANDSHAKE:
1391                         do {
1392                                 r = gnutls_handshake(ssl);
1393                         } while (r == GNUTLS_E_AGAIN || r == GNUTLS_E_INTERRUPTED);
1394                         break; /* re-receive */
1395                 case GNUTLS_E_AGAIN:
1396                 case GNUTLS_E_INTERRUPTED:
1397                         errno = EAGAIN;
1398                         return -1;
1399
1400                 default:
1401                         return -1;
1402                 }
1403         }
1404
1405 }
1406 #endif
1407
1408 gint sock_read(SockInfo *sock, gchar *buf, gint len)
1409 {
1410         gint ret;
1411
1412         cm_return_val_if_fail(sock != NULL, -1);
1413
1414 #ifdef USE_GNUTLS
1415         if (sock->ssl)
1416                 ret = ssl_read(sock->ssl, buf, len);
1417         else
1418 #endif
1419                 ret = fd_read(sock->sock, buf, len);
1420
1421         if (ret < 0)
1422                 sock->state = CONN_DISCONNECTED;
1423         return ret;
1424 }
1425
1426 gint fd_write(gint fd, const gchar *buf, gint len)
1427 {
1428         if (fd_check_io(fd, G_IO_OUT) < 0)
1429                 return -1;
1430
1431         if (fd_is_w32_socket (fd))
1432                 return send(fd, buf, len, 0);
1433         return write(fd, buf, len);
1434 }
1435
1436 #if USE_GNUTLS
1437 static gint ssl_write(gnutls_session ssl, const gchar *buf, gint len)
1438 {
1439         gint ret;
1440
1441         if (fd_check_io(GPOINTER_TO_INT(gnutls_transport_get_ptr(ssl)), G_IO_OUT) < 0)
1442                 return -1;
1443
1444         ret = gnutls_record_send(ssl, buf, len);
1445
1446         switch (ret) {
1447         case 0:
1448                 return -1;
1449         case GNUTLS_E_AGAIN:
1450         case GNUTLS_E_INTERRUPTED:
1451                 return 0;
1452
1453         default:
1454                 return ret;
1455         }
1456 }
1457
1458 #endif
1459
1460 gint sock_write(SockInfo *sock, const gchar *buf, gint len)
1461 {
1462         gint ret;
1463
1464         cm_return_val_if_fail(sock != NULL, -1);
1465
1466 #ifdef USE_GNUTLS
1467         if (sock->ssl)
1468                 ret = ssl_write(sock->ssl, buf, len);
1469         else
1470 #endif
1471                 ret = fd_write(sock->sock, buf, len);
1472
1473         if (ret < 0)
1474                 sock->state = CONN_DISCONNECTED;
1475         return ret;
1476 }
1477
1478 gint fd_write_all(gint fd, const gchar *buf, gint len)
1479 {
1480         gint n, wrlen = 0;
1481
1482         while (len) {
1483                 if (fd_check_io(fd, G_IO_OUT) < 0)
1484                         return -1;
1485 #ifndef G_OS_WIN32
1486                 signal(SIGPIPE, SIG_IGN);
1487 #endif
1488                 if (fd_is_w32_socket(fd))
1489                         n = send(fd, buf, len, 0);
1490                 else
1491                         n = write(fd, buf, len);
1492
1493                 if (n <= 0) {
1494                         log_error(LOG_PROTOCOL, _("write on fd%d: %s\n"), fd, strerror(errno));
1495                         return -1;
1496                 }
1497                 len -= n;
1498                 wrlen += n;
1499                 buf += n;
1500         }
1501
1502         return wrlen;
1503 }
1504
1505 #ifdef USE_GNUTLS
1506 static gint ssl_write_all(gnutls_session ssl, const gchar *buf, gint len)
1507 {
1508         gint n, wrlen = 0;
1509
1510         while (len) {
1511                 n = ssl_write(ssl, buf, len);
1512                 if (n <= 0)
1513                         return -1;
1514                 len -= n;
1515                 wrlen += n;
1516                 buf += n;
1517         }
1518
1519         return wrlen;
1520 }
1521 #endif
1522
1523 gint sock_write_all(SockInfo *sock, const gchar *buf, gint len)
1524 {
1525         gint ret;
1526
1527         cm_return_val_if_fail(sock != NULL, -1);
1528
1529 #ifdef USE_GNUTLS
1530         if (sock->ssl)
1531                 ret = ssl_write_all(sock->ssl, buf, len);
1532         else
1533 #endif
1534                 ret = fd_write_all(sock->sock, buf, len);
1535
1536         if (ret < 0)
1537                 sock->state = CONN_DISCONNECTED;
1538         return ret;
1539 }
1540
1541 static gint fd_recv(gint fd, gchar *buf, gint len, gint flags)
1542 {
1543         if (fd_check_io(fd, G_IO_IN) < 0)
1544                 return -1;
1545
1546         return recv(fd, buf, len, flags);
1547 }
1548
1549 gint fd_gets(gint fd, gchar *buf, gint len)
1550 {
1551         gchar *newline, *bp = buf;
1552         gint n;
1553
1554         if (--len < 1)
1555                 return -1;
1556
1557 #ifdef G_OS_WIN32
1558         do {
1559 /*
1560 XXX:tm try nonblock
1561 MSKB Article ID: Q147714
1562 Windows Sockets 2 Service Provider Interface Limitations
1563 Polling with recv(MSG_PEEK) to determine when a complete message
1564 has arrived.
1565     Reason and Workaround not available.
1566
1567 Single-byte send() and recv().
1568     Reason: Couple one-byte sends with Nagle disabled.
1569     Workaround: Send modest amounts and receive as much as possible.
1570 (still unused)
1571 */
1572                 if (recv(fd, bp, 1, 0) <= 0)
1573                         return -1;
1574                 if (*bp == '\n')
1575                         break;
1576                 bp++;
1577                 len--;
1578         } while (0 < len);
1579 #else /*!G_OS_WIN32*/
1580         do {
1581                 if ((n = fd_recv(fd, bp, len, MSG_PEEK)) <= 0)
1582                         return -1;
1583                 if ((newline = memchr(bp, '\n', n)) != NULL)
1584                         n = newline - bp + 1;
1585                 if ((n = fd_read(fd, bp, n)) < 0)
1586                         return -1;
1587                 bp += n;
1588                 len -= n;
1589         } while (!newline && len);
1590 #endif /*!G_OS_WIN32*/
1591
1592         *bp = '\0';
1593         return bp - buf;
1594 }
1595
1596 gint sock_close(SockInfo *sock)
1597 {
1598         gint ret;
1599
1600         if (!sock)
1601                 return 0;
1602
1603         if (sock->sock_ch)
1604                 g_io_channel_unref(sock->sock_ch);
1605
1606 #ifdef USE_GNUTLS
1607         if (sock->ssl)
1608                 ssl_done_socket(sock);
1609         if (sock->g_source != 0)
1610                 g_source_remove(sock->g_source);
1611         sock->g_source = 0;
1612 #endif
1613 #ifdef G_OS_WIN32
1614         shutdown(sock->sock, 1); /* complete transfer before close */
1615         ret = closesocket(sock->sock);
1616 #else
1617         ret = fd_close(sock->sock);
1618 #endif
1619
1620         g_free(sock->canonical_name);
1621         g_free(sock->hostname);
1622         g_free(sock);
1623
1624         return ret;
1625 }
1626
1627 gint fd_close(gint fd)
1628 {
1629         return close(fd);
1630 }