src/common/socket.c

   1 /*
   2  * Claws Mail -- a GTK based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2022 the Claws Mail team and Hiroyuki Yamamoto
   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 #ifdef HAVE_CONFIG_H
  20 #  include "config.h"
  21 #include "claws-features.h"
  22 #endif
  23
  24 /* This can probably be handled better, e.g. define it in config.h. */
  25 #define _WIN32_WINNT _WIN32_WINNT_WIN6
  26 #include <glib.h>
  27 #include <glib/gi18n.h>
  28
  29 #include <sys/time.h>
  30 #include <sys/types.h>
  31 #ifdef G_OS_WIN32
  32 #  include <ws2tcpip.h>
  33 #  ifndef EINPROGRESS
  34 #    define EINPROGRESS WSAEINPROGRESS
  35 #  endif
  36 #else
  37 #  if HAVE_SYS_WAIT_H
  38 #    include <sys/wait.h>
  39 #  endif
  40 #  include <sys/socket.h>
  41 #  include <sys/stat.h>
  42 #  include <sys/un.h>
  43 #  include <netinet/in.h>
  44 #  include <arpa/inet.h>
  45 #  include <resolv.h>
  46 #  ifndef _PATH_RESCONF
  47 #    define _PATH_RESCONF "/etc/resolv.conf"
  48 #  endif
  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 #ifdef USE_GNUTLS
 133 static gboolean ssl_sock_prepare        (GSource        *source,
 134                                          gint           *timeout);
 135 static gboolean ssl_sock_check          (GSource        *source);
 136 static gboolean ssl_sock_dispatch       (GSource        *source,
 137                                          GSourceFunc     callback,
 138                                          gpointer        user_data);
 139 GSourceFuncs ssl_watch_funcs = {
 140         ssl_sock_prepare,
 141         ssl_sock_check,
 142         ssl_sock_dispatch,
 143         NULL,
 144         NULL,
 145         NULL
 146 };
 147 #endif
 148
 149 static gint sock_connect_with_timeout   (gint                    sock,
 150                                          const struct sockaddr  *serv_addr,
 151                                          gint                    addrlen,
 152                                          guint                   timeout_secs);
 153
 154 static gint sock_connect_by_getaddrinfo (const gchar    *hostname,
 155                                          gushort         port);
 156
 157 static SockInfo *sockinfo_from_fd(const gchar *hostname,
 158                                   gushort port,
 159                                   gint sock);
 160 static void sock_address_list_free              (GList          *addr_list);
 161
 162 static gboolean sock_connect_async_cb           (GIOChannel     *source,
 163                                                  GIOCondition    condition,
 164                                                  gpointer        data);
 165 static gint sock_connect_async_get_address_info_cb
 166                                                 (GList          *addr_list,
 167                                                  gpointer        data);
 168
 169 static gint sock_connect_address_list_async     (SockConnectData *conn_data);
 170
 171 static gboolean sock_get_address_info_async_cb  (GIOChannel     *source,
 172                                                  GIOCondition    condition,
 173                                                  gpointer        data);
 174 static SockLookupData *sock_get_address_info_async
 175                                                 (const gchar    *hostname,
 176                                                  gushort         port,
 177                                                  SockAddrFunc    func,
 178                                                  gpointer        data);
 179 static gint sock_get_address_info_async_cancel  (SockLookupData *lookup_data);
 180
 181
 182 gint sock_init(void)
 183 {
 184 #ifdef G_OS_WIN32
 185         WSADATA wsadata;
 186         gint result;
 187
 188         result = WSAStartup(MAKEWORD(2, 2), &wsadata);
 189         if (result != NO_ERROR) {
 190                 g_warning("WSAStartup() failed");
 191                 return -1;
 192         }
 193 #endif
 194         return 0;
 195 }
 196
 197 gint sock_cleanup(void)
 198 {
 199 #ifdef G_OS_WIN32
 200         WSACleanup();
 201 #endif
 202         return 0;
 203 }
 204
 205 gint sock_set_io_timeout(guint sec)
 206 {
 207         io_timeout = sec;
 208         return 0;
 209 }
 210
 211 void refresh_resolvers(void)
 212 {
 213 #ifdef G_OS_UNIX
 214         static time_t resolv_conf_changed = (time_t)NULL;
 215         GStatBuf s;
 216
 217         /* This makes the glibc re-read resolv.conf, if it changed
 218          * since our startup. Maybe that should be #ifdef'ed, I don't
 219          * know if it'd work on BSDs.
 220          * Why doesn't the glibc do it by itself?
 221          */
 222         if (g_stat(_PATH_RESCONF, &s) == 0) {
 223                 if (s.st_mtime > resolv_conf_changed) {
 224                         resolv_conf_changed = s.st_mtime;
 225                         res_init();
 226                 }
 227         } /* else
 228                 we'll have bigger problems. */
 229 #endif /*G_OS_UNIX*/
 230 }
 231
 232 #ifdef G_OS_WIN32
 233 #define SOCKET_IS_VALID(s)      ((s) != INVALID_SOCKET)
 234 #else
 235 #define SOCKET_IS_VALID(s)      (s != -1)
 236 #endif
 237
 238 #ifdef G_OS_WIN32
 239 /* Due to the fact that socket under Windows are not represented by
 240    standard file descriptors, we sometimes need to check whether a
 241    given file descriptor is actually a socket.  This is done by
 242    testing for an error.  Returns true under W32 if FD is a socket. */
 243 static int fd_is_w32_socket(gint fd)
 244 {
 245         gint optval;
 246         gint retval = sizeof(optval);
 247
 248         return !getsockopt(fd, SOL_SOCKET, SO_TYPE, (char*)&optval, &retval);
 249 }
 250 #endif
 251
 252 gint fd_connect_inet(gushort port)
 253 {
 254         gint sock;
 255         struct sockaddr_in addr;
 256
 257         sock = socket(AF_INET, SOCK_STREAM, 0);
 258         if (!SOCKET_IS_VALID(sock)) {
 259 #ifdef G_OS_WIN32
 260                 debug_print("fd_connect_inet(): socket() failed: %d\n",
 261                           WSAGetLastError());
 262 #else
 263                 perror("fd_connect_inet(): socket");
 264 #endif
 265                 return -1;
 266         }
 267
 268         memset(&addr, 0, sizeof(addr));
 269         addr.sin_family = AF_INET;
 270         addr.sin_port = htons(port);
 271         addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 272
 273         if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 274                 fd_close(sock);
 275                 return -1;
 276         }
 277
 278         return sock;
 279 }
 280 gint fd_open_inet(gushort port)
 281 {
 282         gint sock;
 283         struct sockaddr_in addr;
 284         gint val;
 285
 286         sock = socket(AF_INET, SOCK_STREAM, 0);
 287         if (!SOCKET_IS_VALID(sock)) {
 288 #ifdef G_OS_WIN32
 289                 g_warning("fd_open_inet(): socket() failed: %d",
 290                           WSAGetLastError());
 291 #else
 292                 perror("fd_open_inet(): socket");
 293 #endif
 294                 return -1;
 295         }
 296
 297         val = 1;
 298         if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *)&val,
 299                        sizeof(val)) < 0) {
 300                 perror("setsockopt");
 301                 fd_close(sock);
 302                 return -1;
 303         }
 304
 305         memset(&addr, 0, sizeof(addr));
 306         addr.sin_family = AF_INET;
 307         addr.sin_port = htons(port);
 308         addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 309
 310         if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 311                 perror("bind");
 312                 fd_close(sock);
 313                 return -1;
 314         }
 315
 316         if (listen(sock, 1) < 0) {
 317                 perror("listen");
 318                 fd_close(sock);
 319                 return -1;
 320         }
 321
 322         return sock;
 323 }
 324
 325 gint fd_connect_unix(const gchar *path)
 326 {
 327 #ifdef G_OS_UNIX
 328         gint sock;
 329         struct sockaddr_un addr;
 330
 331         sock = socket(PF_UNIX, SOCK_STREAM, 0);
 332         if (sock < 0) {
 333                 perror("sock_connect_unix(): socket");
 334                 return -1;
 335         }
 336
 337         memset(&addr, 0, sizeof(addr));
 338         addr.sun_family = AF_UNIX;
 339         strncpy(addr.sun_path, path, sizeof(addr.sun_path) - 1);
 340
 341         if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 342                 close(sock);
 343                 return -1;
 344         }
 345
 346         return sock;
 347 #else
 348         return -1;
 349 #endif
 350 }
 351
 352 gint fd_open_unix(const gchar *path)
 353 {
 354 #ifdef G_OS_UNIX
 355         gint sock;
 356         struct sockaddr_un addr;
 357
 358         sock = socket(PF_UNIX, SOCK_STREAM, 0);
 359
 360         if (sock < 0) {
 361                 perror("sock_open_unix(): socket");
 362                 return -1;
 363         }
 364
 365         memset(&addr, 0, sizeof(addr));
 366         addr.sun_family = AF_UNIX;
 367         strncpy(addr.sun_path, path, sizeof(addr.sun_path) - 1);
 368
 369         if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 370                 gchar *buf = g_strdup_printf("can't bind to %s", path);
 371                 perror(buf);
 372                 g_free(buf);
 373                 close(sock);
 374                 return -1;
 375         }
 376
 377         if (listen(sock, 1) < 0) {
 378                 gchar *buf = g_strdup_printf("can't listen on %s", path);
 379                 perror(buf);
 380                 g_free(buf);
 381                 close(sock);
 382                 return -1;
 383         }
 384
 385         return sock;
 386 #else
 387         return -1;
 388 #endif
 389 }
 390
 391 gint fd_accept(gint sock)
 392 {
 393         struct sockaddr_in caddr;
 394         guint caddr_len;
 395
 396         caddr_len = sizeof(caddr);
 397         return accept(sock, (struct sockaddr *)&caddr, &caddr_len);
 398 }
 399
 400
 401 static gint set_nonblocking_mode(gint fd, gboolean nonblock)
 402 {
 403 #ifdef G_OS_UNIX
 404         gint flags;
 405
 406         flags = fcntl(fd, F_GETFL, 0);
 407         if (flags < 0) {
 408                 perror("fcntl");
 409                 return -1;
 410         }
 411
 412         if (nonblock)
 413                 flags |= O_NONBLOCK;
 414         else
 415                 flags &= ~O_NONBLOCK;
 416
 417         return fcntl(fd, F_SETFL, flags);
 418 #else
 419         return -1;
 420 #endif
 421 }
 422
 423 gint sock_set_nonblocking_mode(SockInfo *sock, gboolean nonblock)
 424 {
 425         cm_return_val_if_fail(sock != NULL, -1);
 426
 427         return set_nonblocking_mode(sock->sock, nonblock);
 428 }
 429
 430 static gboolean is_nonblocking_mode(gint fd)
 431 {
 432 #ifdef G_OS_UNIX
 433         gint flags;
 434
 435         flags = fcntl(fd, F_GETFL, 0);
 436         if (flags < 0) {
 437                 perror("fcntl");
 438                 return FALSE;
 439         }
 440
 441         return ((flags & O_NONBLOCK) != 0);
 442 #else
 443         return FALSE;
 444 #endif
 445 }
 446
 447 gboolean sock_is_nonblocking_mode(SockInfo *sock)
 448 {
 449         cm_return_val_if_fail(sock != NULL, FALSE);
 450
 451         return is_nonblocking_mode(sock->sock);
 452 }
 453
 454
 455 #ifdef USE_GNUTLS
 456 static gboolean ssl_sock_prepare(GSource *source, gint *timeout)
 457 {
 458         *timeout = 1;
 459         return FALSE;
 460 }
 461
 462 static gboolean ssl_sock_check(GSource *source)
 463 {
 464         SockInfo *sock = ((SockSource *)source)->sock;
 465         struct timeval timeout = {0, 0};
 466         fd_set fds;
 467         GIOCondition condition = 0;
 468
 469         if (!sock || !sock->sock)
 470                 return FALSE;
 471
 472         condition = sock->condition;
 473
 474         if ((condition & G_IO_IN) == G_IO_IN &&
 475             gnutls_record_check_pending(sock->ssl) != 0)
 476                 return TRUE;
 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 ssl_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 #endif
 500
 501 static gboolean sock_watch_cb(GIOChannel *source, GIOCondition condition,
 502                               gpointer data)
 503 {
 504         SockInfo *sock = (SockInfo *)data;
 505
 506         if ((condition & sock->condition) == 0)
 507                 return TRUE;
 508
 509         return sock->callback(sock, sock->condition, sock->data);
 510 }
 511
 512 guint sock_add_watch(SockInfo *sock, GIOCondition condition, SockFunc func,
 513                      gpointer data)
 514 {
 515         if (!sock)
 516                 return FALSE;
 517
 518         sock->callback = func;
 519         sock->condition = condition;
 520         sock->data = data;
 521
 522 #ifdef USE_GNUTLS
 523         if (sock->ssl)
 524         {
 525                 GSource *source = g_source_new(&ssl_watch_funcs,
 526                                                sizeof(SockSource));
 527                 ((SockSource *) source)->sock = sock;
 528                 g_source_set_priority(source, G_PRIORITY_DEFAULT);
 529                 g_source_set_can_recurse(source, FALSE);
 530                 sock->g_source = g_source_attach(source, NULL);
 531                 g_source_unref (source); /* Refcount back down to 1 */
 532                 return sock->g_source;
 533         }
 534 #endif
 535
 536         return g_io_add_watch(sock->sock_ch, condition, sock_watch_cb, sock);
 537 }
 538
 539 static gint fd_check_io(gint fd, GIOCondition cond)
 540 {
 541         struct timeval timeout;
 542         fd_set fds;
 543
 544         if (is_nonblocking_mode(fd))
 545                 return 0;
 546
 547         timeout.tv_sec  = io_timeout;
 548         timeout.tv_usec = 0;
 549
 550         FD_ZERO(&fds);
 551         FD_SET(fd, &fds);
 552
 553         if (cond == G_IO_IN) {
 554                 select(fd + 1, &fds, NULL, NULL,
 555                        io_timeout > 0 ? &timeout : NULL);
 556         } else {
 557                 select(fd + 1, NULL, &fds, NULL,
 558                        io_timeout > 0 ? &timeout : NULL);
 559         }
 560
 561         if (FD_ISSET(fd, &fds)) {
 562                 return 0;
 563         } else {
 564                 g_warning("socket IO timeout");
 565                 log_error(LOG_PROTOCOL, _("Socket IO timeout.\n"));
 566                 return -1;
 567         }
 568 }
 569
 570 #ifdef G_OS_UNIX
 571 static sigjmp_buf jmpenv;
 572
 573 static void timeout_handler(gint sig)
 574 {
 575         siglongjmp(jmpenv, 1);
 576 }
 577 #endif /*G_OS_UNIX*/
 578
 579 static gint sock_connect_with_timeout(gint sock,
 580                                       const struct sockaddr *serv_addr,
 581                                       gint addrlen,
 582                                       guint timeout_secs)
 583 {
 584         gint ret, saved_errno;
 585 #ifdef G_OS_UNIX
 586         void (*prev_handler)(gint);
 587
 588         alarm(0);
 589         prev_handler = signal(SIGALRM, timeout_handler);
 590         if (sigsetjmp(jmpenv, 1)) {
 591                 alarm(0);
 592                 signal(SIGALRM, prev_handler);
 593                 errno = ETIMEDOUT;
 594                 log_error(LOG_PROTOCOL, _("Connection timed out.\n"));
 595                 return -1;
 596         }
 597         alarm(timeout_secs);
 598 #endif
 599
 600         ret = connect(sock, serv_addr, addrlen);
 601         saved_errno = errno;
 602
 603         if (ret == -1) {
 604                 debug_print("connect() failed: %d (%s)\n",
 605                                 saved_errno, g_strerror(saved_errno));
 606         }
 607
 608 #ifdef G_OS_UNIX
 609         alarm(0);
 610         signal(SIGALRM, prev_handler);
 611 #endif
 612
 613         return ret;
 614 }
 615
 616 static gint sock_connect_by_getaddrinfo(const gchar *hostname, gushort  port)
 617 {
 618         gint sock = -1, gai_error;
 619         struct addrinfo hints, *res, *ai;
 620         gchar port_str[6];
 621
 622         refresh_resolvers();
 623
 624         memset(&hints, 0, sizeof(hints));
 625         hints.ai_flags = AI_ADDRCONFIG;
 626
 627 #ifdef INET6
 628         hints.ai_family = AF_UNSPEC;
 629 #else
 630         hints.ai_family = AF_INET;
 631 #endif
 632
 633         hints.ai_socktype = SOCK_STREAM;
 634         hints.ai_protocol = IPPROTO_TCP;
 635
 636         /* convert port from integer to string. */
 637         g_snprintf(port_str, sizeof(port_str), "%d", port);
 638
 639         if ((gai_error = getaddrinfo(hostname, port_str, &hints, &res)) != 0) {
 640                 g_printerr("getaddrinfo for %s:%s failed: %s\n",
 641                         hostname, port_str, gai_strerror(gai_error));
 642                 return -1;
 643         }
 644
 645         for (ai = res; ai != NULL; ai = ai->ai_next) {
 646 #ifndef INET6
 647                 if (ai->ai_family == AF_INET6)
 648                         continue;
 649 #endif
 650
 651                 sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
 652                 if (sock < 0 )
 653                         continue;
 654 #ifdef G_OS_WIN32
 655                 if (sock == INVALID_SOCKET)
 656                         continue;
 657 #endif
 658
 659                 if (sock_connect_with_timeout
 660                         (sock, ai->ai_addr, ai->ai_addrlen, io_timeout) == 0)
 661                         break;
 662
 663                 close(sock);
 664         }
 665
 666         if (res != NULL)
 667                 freeaddrinfo(res);
 668
 669         if (ai == NULL)
 670                 return -1;
 671
 672         return sock;
 673 }
 674
 675 SockInfo *sock_connect(const gchar *hostname, gushort port)
 676 {
 677 #ifdef G_OS_WIN32
 678         SOCKET sock;
 679 #else
 680         gint sock;
 681 #endif
 682
 683         if ((sock = sock_connect_by_getaddrinfo(hostname, port)) < 0) {
 684                 return NULL;
 685         }
 686
 687         return sockinfo_from_fd(hostname, port, sock);
 688 }
 689
 690
 691 static void sock_address_list_free(GList *addr_list)
 692 {
 693         GList *cur;
 694
 695         for (cur = addr_list; cur != NULL; cur = cur->next) {
 696                 SockAddrData *addr_data = (SockAddrData *)cur->data;
 697                 g_free(addr_data->addr);
 698                 g_free(addr_data);
 699         }
 700
 701         g_list_free(addr_list);
 702 }
 703
 704 /* asynchronous TCP connection */
 705
 706 static gboolean sock_connect_async_cb(GIOChannel *source,
 707                                       GIOCondition condition, gpointer data)
 708 {
 709         SockConnectData *conn_data = (SockConnectData *)data;
 710         gint fd;
 711         gint val;
 712         guint len;
 713         SockInfo *sockinfo;
 714
 715         if (conn_data->io_tag == 0 && conn_data->channel == NULL)
 716                 return FALSE;
 717
 718         fd = g_io_channel_unix_get_fd(source);
 719
 720         conn_data->io_tag = 0;
 721         conn_data->channel = NULL;
 722         g_io_channel_unref(source);
 723
 724         len = sizeof(val);
 725         if (getsockopt(fd, SOL_SOCKET, SO_ERROR, (void*)&val, &len) < 0) {
 726                 perror("getsockopt");
 727                 close(fd);
 728                 sock_connect_address_list_async(conn_data);
 729                 return FALSE;
 730         }
 731
 732         if (val != 0) {
 733                 close(fd);
 734                 log_error(LOG_PROTOCOL, _("%s:%d: connection failed (%s).\n"),
 735                           conn_data->hostname, conn_data->port,
 736                           g_strerror(val));
 737                 sock_connect_address_list_async(conn_data);
 738                 return FALSE;
 739         }
 740
 741         sockinfo = g_new0(SockInfo, 1);
 742         sockinfo->sock = fd;
 743 #ifndef G_OS_WIN32
 744         sockinfo->sock_ch = g_io_channel_unix_new(fd);
 745 #else
 746         sockinfo->sock_ch = g_io_channel_win32_new_socket(fd);
 747 #endif
 748         sockinfo->hostname = g_strdup(conn_data->hostname);
 749         sockinfo->port = conn_data->port;
 750         sockinfo->state = CONN_ESTABLISHED;
 751         sockinfo->canonical_name = g_strdup(conn_data->canonical_name);
 752
 753         conn_data->func(sockinfo, conn_data->data);
 754
 755         sock_connect_async_cancel(conn_data->id);
 756
 757         return FALSE;
 758 }
 759
 760 static gint sock_connect_async_get_address_info_cb(GList *addr_list,
 761                                                    gpointer data)
 762 {
 763         SockConnectData *conn_data = (SockConnectData *)data;
 764
 765         conn_data->addr_list = addr_list;
 766         conn_data->cur_addr = addr_list;
 767         if (conn_data->lookup_data) {
 768                 conn_data->canonical_name = conn_data->lookup_data->canonical_name;
 769                 conn_data->lookup_data->canonical_name = NULL;
 770                 conn_data->lookup_data = NULL;
 771         }
 772         return sock_connect_address_list_async(conn_data);
 773 }
 774
 775 gint sock_connect_async(const gchar *hostname, gushort port,
 776                         SockConnectFunc func, gpointer data)
 777 {
 778         static gint id = 1;
 779         SockConnectData *conn_data;
 780
 781         conn_data = g_new0(SockConnectData, 1);
 782         conn_data->id = id++;
 783         conn_data->hostname = g_strdup(hostname);
 784         conn_data->port = port;
 785         conn_data->addr_list = NULL;
 786         conn_data->cur_addr = NULL;
 787         conn_data->io_tag = 0;
 788         conn_data->func = func;
 789         conn_data->data = data;
 790
 791         conn_data->lookup_data = sock_get_address_info_async
 792                 (hostname, port, sock_connect_async_get_address_info_cb,
 793                  conn_data);
 794
 795         if (conn_data->lookup_data == NULL) {
 796                 g_free(conn_data->hostname);
 797                 g_free(conn_data);
 798                 return -1;
 799         }
 800
 801         sock_connect_data_list = g_list_append(sock_connect_data_list,
 802                                                conn_data);
 803
 804         return conn_data->id;
 805 }
 806
 807 gint sock_connect_async_cancel(gint id)
 808 {
 809         SockConnectData *conn_data = NULL;
 810         GList *cur;
 811
 812         for (cur = sock_connect_data_list; cur != NULL; cur = cur->next) {
 813                 if (((SockConnectData *)cur->data)->id == id) {
 814                         conn_data = (SockConnectData *)cur->data;
 815                         break;
 816                 }
 817         }
 818
 819         if (conn_data) {
 820                 sock_connect_data_list = g_list_remove(sock_connect_data_list,
 821                                                        conn_data);
 822
 823                 if (conn_data->lookup_data)
 824                         sock_get_address_info_async_cancel
 825                                 (conn_data->lookup_data);
 826
 827                 if (conn_data->io_tag > 0)
 828                         g_source_remove(conn_data->io_tag);
 829                 if (conn_data->channel) {
 830                         GError *err = NULL;
 831                         g_io_channel_shutdown(conn_data->channel, TRUE, &err);
 832                         if (err)
 833                                 g_error_free(err);
 834                         g_io_channel_unref(conn_data->channel);
 835                 }
 836
 837                 sock_address_list_free(conn_data->addr_list);
 838                 g_free(conn_data->canonical_name);
 839                 g_free(conn_data->hostname);
 840                 g_free(conn_data);
 841         } else {
 842                 g_warning("sock_connect_async_cancel: id %d not found", id);
 843                 return -1;
 844         }
 845
 846         return 0;
 847 }
 848
 849 static gint sock_connect_address_list_async(SockConnectData *conn_data)
 850 {
 851         SockAddrData *addr_data;
 852         gint sock = -1;
 853
 854         for (; conn_data->cur_addr != NULL;
 855              conn_data->cur_addr = conn_data->cur_addr->next) {
 856                 addr_data = (SockAddrData *)conn_data->cur_addr->data;
 857
 858                 if ((sock = socket(addr_data->family, addr_data->socktype,
 859                                    addr_data->protocol)) < 0) {
 860                         perror("socket");
 861
 862                         continue;
 863                 }
 864
 865                 set_nonblocking_mode(sock, TRUE);
 866
 867                 if (connect(sock, addr_data->addr, addr_data->addr_len) < 0) {
 868                         if (EINPROGRESS == errno) {
 869                                 break;
 870                         } else {
 871                                 perror("connect");
 872                                 close(sock);
 873                         }
 874                 } else {
 875                         break;
 876                 }
 877         }
 878
 879         if (conn_data->cur_addr == NULL) {
 880                 conn_data->func(NULL, conn_data->data);
 881                 sock_connect_async_cancel(conn_data->id);
 882                 return -1;
 883         }
 884
 885         conn_data->cur_addr = conn_data->cur_addr->next;
 886
 887 #ifndef G_OS_WIN32
 888         conn_data->channel = g_io_channel_unix_new(sock);
 889 #else
 890         conn_data->channel = g_io_channel_win32_new_socket(sock);
 891 #endif
 892         conn_data->io_tag = g_io_add_watch(conn_data->channel, G_IO_IN|G_IO_OUT,
 893                                            sock_connect_async_cb, conn_data);
 894
 895         return 0;
 896 }
 897
 898 /* asynchronous DNS lookup */
 899
 900 static gboolean sock_get_address_info_async_cb(GIOChannel *source,
 901                                                GIOCondition condition,
 902                                                gpointer data)
 903 {
 904         SockLookupData *lookup_data = (SockLookupData *)data;
 905         GList *addr_list = NULL;
 906         SockAddrData *addr_data;
 907         gsize bytes_read;
 908         gint ai_member[4];
 909         struct sockaddr *addr;
 910         gchar *canonical_name = NULL;
 911         gchar len = 0;
 912         GError *err = NULL;
 913
 914         g_io_channel_set_encoding(source, NULL, &err);
 915         if (err) {
 916                 g_warning("can't unset encoding: %s", err->message);
 917                 g_error_free(err);
 918                 return FALSE;
 919         }
 920         g_io_channel_set_buffered(source, FALSE);
 921         if (g_io_channel_read_chars(source, &len, sizeof(len),
 922                               &bytes_read, &err) == G_IO_STATUS_NORMAL) {
 923                 if (err != NULL) {
 924                         g_warning("g_io_channel_read_chars: %s", err->message);
 925                         g_error_free(err);
 926                         return FALSE;
 927                 }
 928                 if (bytes_read == sizeof(len) && len > 0) {
 929                         gchar *cur = NULL;
 930                         gint todo = len;
 931                         canonical_name = g_malloc0(len + 1);
 932                         cur = canonical_name;
 933                         while (todo > 0) {
 934                                 if (g_io_channel_read_chars(source, cur, todo,
 935                                       &bytes_read, &err) != G_IO_STATUS_NORMAL) {
 936                                         if (err) {
 937                                               g_warning("canonical name not read %s", err->message);
 938                                               g_free(canonical_name);
 939                                               canonical_name = NULL;
 940                                               g_error_free(err);
 941                                               err = NULL;
 942                                               break;
 943                                         }
 944                                 } else {
 945                                         cur += bytes_read;
 946                                         todo -= bytes_read;
 947                                 }
 948                                 if (bytes_read == 0) {
 949                                       g_warning("canonical name not read");
 950                                       g_free(canonical_name);
 951                                       canonical_name = NULL;
 952                                       break;
 953                                 }
 954                         }
 955                 }
 956         }
 957         for (;;) {
 958                 if (g_io_channel_read_chars(source, (gchar *)ai_member,
 959                                       sizeof(ai_member), &bytes_read, &err)
 960                     != G_IO_STATUS_NORMAL) {
 961                         if (err != NULL) {
 962                                 g_warning("g_io_channel_read_chars: addr len %s", err->message);
 963                                 g_error_free(err);
 964                                 err = NULL;
 965                                 break;
 966                         }
 967                 }
 968
 969                 if (bytes_read == 0 || bytes_read != sizeof(ai_member))
 970                         break;
 971
 972                 if (ai_member[0] == AF_UNSPEC) {
 973                         g_warning("DNS lookup failed");
 974                         log_error(LOG_PROTOCOL, _("%s:%d: unknown host.\n"),
 975                                 lookup_data->hostname, lookup_data->port);
 976                         break;
 977                 }
 978
 979                 addr = g_malloc(ai_member[3]);
 980                 if (g_io_channel_read_chars(source, (gchar *)addr, ai_member[3],
 981                                       &bytes_read, &err)
 982                     != G_IO_STATUS_NORMAL) {
 983                         if (err != NULL) {
 984                                 g_warning("g_io_channel_read_chars: addr data read %s", err->message);
 985                                 g_error_free(err);
 986                                 err = NULL;
 987                                 g_free(addr);
 988                                 break;
 989                         }
 990                 }
 991
 992                 if (bytes_read != ai_member[3]) {
 993                         g_warning("sock_get_address_info_async_cb: "
 994                                   "incomplete address data");
 995                         g_free(addr);
 996                         break;
 997                 }
 998
 999                 addr_data = g_new0(SockAddrData, 1);
1000                 addr_data->family = ai_member[0];
1001                 addr_data->socktype = ai_member[1];
1002                 addr_data->protocol = ai_member[2];
1003                 addr_data->addr_len = ai_member[3];
1004                 addr_data->addr = addr;
1005
1006                 addr_list = g_list_append(addr_list, addr_data);
1007         }
1008
1009         g_io_channel_shutdown(source, TRUE, &err);
1010         if (err)
1011                 g_error_free(err);
1012         g_io_channel_unref(source);
1013
1014 #ifdef G_OS_WIN32
1015         /* FIXME: We would need to cancel the thread. */
1016 #else
1017         kill(lookup_data->child_pid, SIGKILL);
1018         waitpid(lookup_data->child_pid, NULL, 0);
1019 #endif
1020         lookup_data->canonical_name = canonical_name;
1021
1022         lookup_data->func(addr_list, lookup_data->data);
1023
1024         g_free(lookup_data->canonical_name);
1025         g_free(lookup_data->hostname);
1026         g_free(lookup_data);
1027
1028         return FALSE;
1029 }
1030
1031
1032 /* For better readability we use a separate function to implement the
1033    child code of sock_get_address_info_async.  Note, that under W32
1034    this is actually not a child but a thread and this is the reason
1035    why we pass only a void pointer. */
1036 static void address_info_async_child(void *opaque)
1037 {
1038         SockLookupData *parm = opaque;
1039         gint gai_err;
1040         struct addrinfo hints, *res, *ai;
1041         gchar port_str[6];
1042         gint ai_member[4] = {AF_UNSPEC, 0, 0, 0};
1043
1044 #ifndef G_OS_WIN32
1045         close(parm->pipe_fds[0]);
1046         parm->pipe_fds[0] = -1;
1047 #endif
1048
1049         memset(&hints, 0, sizeof(hints));
1050         hints.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
1051 #ifdef INET6
1052         hints.ai_family = AF_UNSPEC;
1053 #else
1054                                 hints.ai_family = AF_INET;
1055 #endif
1056         hints.ai_socktype = SOCK_STREAM;
1057         hints.ai_protocol = IPPROTO_TCP;
1058
1059         g_snprintf(port_str, sizeof(port_str), "%d", parm->port);
1060
1061         gai_err = getaddrinfo(parm->hostname, port_str, &hints, &res);
1062         if (gai_err != 0) {
1063                 gchar len = 0;
1064                 g_warning("getaddrinfo for %s:%s failed: %s",
1065                           parm->hostname, port_str, gai_strerror(gai_err));
1066                 log_error(LOG_PROTOCOL, _("%s:%s: host lookup failed (%s).\n"),
1067                           parm->hostname, port_str, gai_strerror(gai_err));
1068                 fd_write_all(parm->pipe_fds[1], &len,
1069                      sizeof(len));
1070                 fd_write_all(parm->pipe_fds[1], (gchar *)ai_member,
1071                              sizeof(ai_member));
1072                 close(parm->pipe_fds[1]);
1073                 parm->pipe_fds[1] = -1;
1074 #ifdef G_OS_WIN32
1075                 _endthread();
1076 #else
1077                 _exit(1);
1078 #endif
1079         }
1080
1081         if (res != NULL) {
1082                 if (res->ai_canonname && strlen(res->ai_canonname) < 255) {
1083                         gchar len = strlen(res->ai_canonname);
1084                         fd_write_all(parm->pipe_fds[1], &len,
1085                              sizeof(len));
1086                         fd_write_all(parm->pipe_fds[1], res->ai_canonname,
1087                              len);
1088                 } else {
1089                         gchar len = 0;
1090                         fd_write_all(parm->pipe_fds[1], &len,
1091                              sizeof(len));
1092                 }
1093         } else {
1094                 gchar len = 0;
1095                 fd_write_all(parm->pipe_fds[1], &len,
1096                      sizeof(len));
1097         }
1098
1099         for (ai = res; ai != NULL; ai = ai->ai_next) {
1100                 ai_member[0] = ai->ai_family;
1101                 ai_member[1] = ai->ai_socktype;
1102                 ai_member[2] = ai->ai_protocol;
1103                 ai_member[3] = ai->ai_addrlen;
1104
1105                 fd_write_all(parm->pipe_fds[1], (gchar *)ai_member,
1106                              sizeof(ai_member));
1107                 fd_write_all(parm->pipe_fds[1], (gchar *)ai->ai_addr,
1108                              ai->ai_addrlen);
1109         }
1110
1111         if (res != NULL)
1112                 freeaddrinfo(res);
1113
1114         close(parm->pipe_fds[1]);
1115         parm->pipe_fds[1] = -1;
1116
1117 #ifdef G_OS_WIN32
1118         _endthread();
1119 #else
1120         _exit(0);
1121 #endif
1122 }
1123
1124 static SockLookupData *sock_get_address_info_async(const gchar *hostname,
1125                                                    gushort port,
1126                                                    SockAddrFunc func,
1127                                                    gpointer data)
1128 {
1129         SockLookupData *lookup_data = NULL;
1130
1131         refresh_resolvers();
1132
1133         lookup_data = g_new0(SockLookupData, 1);
1134         lookup_data->hostname = g_strdup(hostname);
1135         lookup_data->func = func;
1136         lookup_data->data = data;
1137         lookup_data->port = port;
1138         lookup_data->child_pid = (pid_t)(-1);
1139         lookup_data->pipe_fds[0] = -1;
1140         lookup_data->pipe_fds[1] = -1;
1141
1142         if (pipe(lookup_data->pipe_fds) < 0) {
1143                 perror("pipe");
1144                 func(NULL, data);
1145                 g_free (lookup_data->hostname);
1146                 g_free (lookup_data);
1147                 return NULL;
1148         }
1149
1150 #ifndef G_OS_WIN32
1151         if ((lookup_data->child_pid = fork()) < 0) {
1152                 perror("fork");
1153                 func(NULL, data);
1154                 g_free (lookup_data->hostname);
1155                 g_free (lookup_data);
1156                 return NULL;
1157         }
1158
1159         if (lookup_data->child_pid == 0) {
1160                 /* Child process. */
1161                 address_info_async_child (lookup_data);
1162                 g_assert_not_reached ();
1163         }
1164         /* Parent process. */
1165         close(lookup_data->pipe_fds[1]);
1166         lookup_data->pipe_fds[1] = -1;
1167 #endif  /*!G_OS_WIN32 */
1168
1169 #ifndef G_OS_WIN32
1170         lookup_data->channel = g_io_channel_unix_new(lookup_data->pipe_fds[0]);
1171 #else
1172         lookup_data->channel = g_io_channel_win32_new_fd(lookup_data->pipe_fds[0]);
1173 #endif
1174         lookup_data->io_tag = g_io_add_watch(lookup_data->channel, G_IO_IN,
1175                                              sock_get_address_info_async_cb,
1176                                              lookup_data);
1177 #ifdef G_OS_WIN32
1178         lookup_data->child_pid = _beginthread(
1179                 address_info_async_child, 0, lookup_data);
1180 #endif
1181
1182         return lookup_data;
1183 }
1184
1185 static gint sock_get_address_info_async_cancel(SockLookupData *lookup_data)
1186 {
1187         if (lookup_data->io_tag > 0)
1188                 g_source_remove(lookup_data->io_tag);
1189         if (lookup_data->channel) {
1190                 GError *err = NULL;
1191                 g_io_channel_shutdown(lookup_data->channel, TRUE, &err);
1192                 if (err)
1193                         g_error_free(err);
1194
1195                 g_io_channel_unref(lookup_data->channel);
1196         }
1197
1198         if (lookup_data->child_pid > 0) {
1199 #ifdef G_OS_WIN32
1200                 /* FIXME: Need a way to cancel the thread. */
1201 #else
1202                 kill(lookup_data->child_pid, SIGKILL);
1203                 waitpid(lookup_data->child_pid, NULL, 0);
1204 #endif
1205         }
1206
1207         g_free(lookup_data->canonical_name);
1208         g_free(lookup_data->hostname);
1209         g_free(lookup_data);
1210
1211         return 0;
1212 }
1213
1214
1215 static SockInfo *sockinfo_from_fd(const gchar *hostname,
1216                                   gushort port,
1217                                   gint sock)
1218 {
1219         SockInfo *sockinfo;
1220
1221         sockinfo = g_new0(SockInfo, 1);
1222         sockinfo->sock = sock;
1223 #ifndef G_OS_WIN32
1224         sockinfo->sock_ch = g_io_channel_unix_new(sock);
1225 #else
1226         sockinfo->sock_ch = g_io_channel_win32_new_socket(sock);
1227 #endif
1228         sockinfo->hostname = g_strdup(hostname);
1229         sockinfo->port = port;
1230         sockinfo->state = CONN_ESTABLISHED;
1231
1232         return sockinfo;
1233 }
1234
1235 static gint fd_read(gint fd, gchar *buf, gint len)
1236 {
1237         if (fd_check_io(fd, G_IO_IN) < 0)
1238                 return -1;
1239
1240 #ifdef G_OS_WIN32
1241         if (fd_is_w32_socket(fd))
1242                 return recv(fd, buf, len, 0);
1243 #endif
1244
1245         return read(fd, buf, len);
1246 }
1247
1248 #if USE_GNUTLS
1249 static gint ssl_read(gnutls_session_t ssl, gchar *buf, gint len)
1250 {
1251         gint r;
1252
1253         if (gnutls_record_check_pending(ssl) == 0) {
1254                 if (fd_check_io(GPOINTER_TO_INT(gnutls_transport_get_ptr(ssl)), G_IO_IN) < 0)
1255                         return -1;
1256         }
1257
1258         while (1) {
1259                 errno = 0;
1260                 r = gnutls_record_recv(ssl, buf, len);
1261                 if (r > 0)
1262                         return r;
1263
1264                 switch (r) {
1265                 case 0: /* closed connection */
1266                         return -1;
1267
1268                 case GNUTLS_E_REHANDSHAKE:
1269                         do {
1270                                 r = gnutls_handshake(ssl);
1271                         } while (r == GNUTLS_E_AGAIN || r == GNUTLS_E_INTERRUPTED);
1272                         break; /* re-receive */
1273                 case GNUTLS_E_AGAIN:
1274                 case GNUTLS_E_INTERRUPTED:
1275                         errno = EAGAIN;
1276                         return -1;
1277                 case GNUTLS_E_PREMATURE_TERMINATION:
1278                         if (errno == 0)
1279                                 return 0;
1280                         /* fall through */
1281                 default:
1282                         debug_print("Unexpected TLS read result %d\n", r);
1283                         errno = EIO;
1284                         return -1;
1285                 }
1286         }
1287
1288 }
1289 #endif
1290
1291 gint sock_read(SockInfo *sock, gchar *buf, gint len)
1292 {
1293         gint ret;
1294
1295         cm_return_val_if_fail(sock != NULL, -1);
1296
1297 #ifdef USE_GNUTLS
1298         if (sock->ssl)
1299                 ret = ssl_read(sock->ssl, buf, len);
1300         else
1301 #endif
1302                 ret = fd_read(sock->sock, buf, len);
1303
1304         if (ret < 0)
1305                 sock->state = CONN_DISCONNECTED;
1306         return ret;
1307 }
1308
1309 gint fd_write(gint fd, const gchar *buf, gint len)
1310 {
1311         if (fd_check_io(fd, G_IO_OUT) < 0)
1312                 return -1;
1313
1314 #ifdef G_OS_WIN32
1315         if (fd_is_w32_socket (fd))
1316                 return send(fd, buf, len, 0);
1317 #endif
1318
1319         return write(fd, buf, len);
1320 }
1321
1322 #if USE_GNUTLS
1323 static gint ssl_write(gnutls_session_t ssl, const gchar *buf, gint len)
1324 {
1325         gint ret;
1326
1327         if (fd_check_io(GPOINTER_TO_INT(gnutls_transport_get_ptr(ssl)), G_IO_OUT) < 0)
1328                 return -1;
1329
1330         ret = gnutls_record_send(ssl, buf, len);
1331
1332         switch (ret) {
1333         case 0:
1334                 return -1;
1335         case GNUTLS_E_AGAIN:
1336         case GNUTLS_E_INTERRUPTED:
1337                 return 0;
1338
1339         default:
1340                 return ret;
1341         }
1342 }
1343
1344 #endif
1345
1346 gint sock_write(SockInfo *sock, const gchar *buf, gint len)
1347 {
1348         gint ret;
1349
1350         cm_return_val_if_fail(sock != NULL, -1);
1351
1352 #ifdef USE_GNUTLS
1353         if (sock->ssl)
1354                 ret = ssl_write(sock->ssl, buf, len);
1355         else
1356 #endif
1357                 ret = fd_write(sock->sock, buf, len);
1358
1359         if (ret < 0)
1360                 sock->state = CONN_DISCONNECTED;
1361         return ret;
1362 }
1363
1364 gint fd_write_all(gint fd, const gchar *buf, gint len)
1365 {
1366         gint n, wrlen = 0;
1367
1368         while (len) {
1369                 if (fd_check_io(fd, G_IO_OUT) < 0)
1370                         return -1;
1371 #ifndef G_OS_WIN32
1372                 signal(SIGPIPE, SIG_IGN);
1373 #endif
1374
1375 #ifdef G_OS_WIN32
1376                 if (fd_is_w32_socket(fd))
1377                         n = send(fd, buf, len, 0);
1378                 else
1379 #endif
1380                         n = write(fd, buf, len);
1381
1382                 if (n <= 0) {
1383                         log_error(LOG_PROTOCOL, _("write on fd%d: %s\n"), fd, g_strerror(errno));
1384                         return -1;
1385                 }
1386                 len -= n;
1387                 wrlen += n;
1388                 buf += n;
1389         }
1390
1391         return wrlen;
1392 }
1393
1394 #ifdef USE_GNUTLS
1395 static gint ssl_write_all(gnutls_session_t ssl, const gchar *buf, gint len)
1396 {
1397         gint n, wrlen = 0;
1398
1399         while (len) {
1400                 n = ssl_write(ssl, buf, len);
1401                 if (n <= 0)
1402                         return -1;
1403                 len -= n;
1404                 wrlen += n;
1405                 buf += n;
1406         }
1407
1408         return wrlen;
1409 }
1410 #endif
1411
1412 gint sock_write_all(SockInfo *sock, const gchar *buf, gint len)
1413 {
1414         gint ret;
1415
1416         cm_return_val_if_fail(sock != NULL, -1);
1417
1418 #ifdef USE_GNUTLS
1419         if (sock->ssl)
1420                 ret = ssl_write_all(sock->ssl, buf, len);
1421         else
1422 #endif
1423                 ret = fd_write_all(sock->sock, buf, len);
1424
1425         if (ret < 0)
1426                 sock->state = CONN_DISCONNECTED;
1427         return ret;
1428 }
1429
1430 #ifndef G_OS_WIN32
1431 static gint fd_recv(gint fd, gchar *buf, gint len, gint flags)
1432 {
1433         if (fd_check_io(fd, G_IO_IN) < 0)
1434                 return -1;
1435
1436         return recv(fd, buf, len, flags);
1437 }
1438 #endif
1439
1440 gint fd_gets(gint fd, gchar *buf, gint len)
1441 {
1442         gchar *bp = buf;
1443
1444         if (--len < 1)
1445                 return -1;
1446
1447 #ifdef G_OS_WIN32
1448         fd_check_io(fd, G_IO_IN);
1449         do {
1450 /*
1451 XXX:tm try nonblock
1452 MSKB Article ID: Q147714
1453 Windows Sockets 2 Service Provider Interface Limitations
1454 Polling with recv(MSG_PEEK) to determine when a complete message
1455 has arrived.
1456     Reason and Workaround not available.
1457
1458 Single-byte send() and recv().
1459     Reason: Couple one-byte sends with Nagle disabled.
1460     Workaround: Send modest amounts and receive as much as possible.
1461 (still unused)
1462 */
1463                 if (recv(fd, bp, 1, 0) <= 0)
1464                         return -1;
1465                 if (*bp == '\n')
1466                         break;
1467                 bp++;
1468                 len--;
1469         } while (0 < len);
1470 #else /*!G_OS_WIN32*/
1471         gchar *newline;
1472         gint n;
1473         do {
1474                 if ((n = fd_recv(fd, bp, len, MSG_PEEK)) <= 0)
1475                         return -1;
1476                 if ((newline = memchr(bp, '\n', n)) != NULL)
1477                         n = newline - bp + 1;
1478                 if ((n = fd_read(fd, bp, n)) < 0)
1479                         return -1;
1480                 bp += n;
1481                 len -= n;
1482         } while (!newline && len);
1483 #endif /*!G_OS_WIN32*/
1484
1485         *bp = '\0';
1486         return bp - buf;
1487 }
1488
1489 gint sock_close(SockInfo *sock, gboolean close_fd)
1490 {
1491         gint ret = 0;
1492
1493         if (!sock)
1494                 return 0;
1495
1496         if (sock->sock_ch)
1497                 g_io_channel_unref(sock->sock_ch);
1498
1499 #ifdef USE_GNUTLS
1500         if (sock->ssl)
1501                 ssl_done_socket(sock);
1502         if (sock->g_source != 0 && g_main_context_find_source_by_id(NULL, sock->g_source) != NULL)
1503                 g_source_remove(sock->g_source);
1504         sock->g_source = 0;
1505 #endif
1506         if (close_fd) {
1507 #ifdef G_OS_WIN32
1508                 shutdown(sock->sock, 1); /* complete transfer before close */
1509                 ret = closesocket(sock->sock);
1510 #else
1511                 ret = fd_close(sock->sock);
1512 #endif
1513         }
1514
1515         g_free(sock->canonical_name);
1516         g_free(sock->hostname);
1517         g_free(sock);
1518
1519         return ret;
1520 }
1521
1522 gint fd_close(gint fd)
1523 {
1524         return close(fd);
1525 }