src/common/socket.c

   1 /*
   2  * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2017 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 #ifdef HAVE_CONFIG_H
  20 #  include "config.h"
  21 #include "claws-features.h"
  22 #endif
  23
  24 #if (defined (_XOPEN_SOURCE) && !defined (_BSD_SOURCE))
  25 #define _BSD_SOURCE
  26 #endif
  27
  28 /* This can probably be handled better, e.g. define it in config.h. */
  29 #define _WIN32_WINNT _WIN32_WINNT_WIN6
  30 #include <glib.h>
  31 #include <glib/gi18n.h>
  32
  33 #include <sys/time.h>
  34 #include <sys/types.h>
  35 #ifdef G_OS_WIN32
  36 #  include <ws2tcpip.h>
  37 #  ifndef EINPROGRESS
  38 #    define EINPROGRESS WSAEINPROGRESS
  39 #  endif
  40 #  include "w32lib.h"
  41 #else
  42 #  if HAVE_SYS_WAIT_H
  43 #    include <sys/wait.h>
  44 #  endif
  45 #  include <sys/socket.h>
  46 #  include <sys/stat.h>
  47 #  include <sys/un.h>
  48 #  include <netinet/in.h>
  49 #  include <arpa/inet.h>
  50 #  include <resolv.h>
  51 #  ifndef _PATH_RESCONF
  52 #    define _PATH_RESCONF "/etc/resolv.conf"
  53 #  endif
  54 #  include <netdb.h>
  55 #endif /* G_OS_WIN32 */
  56 #include <unistd.h>
  57 #include <stdio.h>
  58 #include <string.h>
  59 #include <stdarg.h>
  60 #include <fcntl.h>
  61 #include <errno.h>
  62 #include <signal.h>
  63 #include <setjmp.h>
  64 #if HAVE_SYS_SELECT_H
  65 #  include <sys/select.h>
  66 #endif
  67
  68 #include "socket.h"
  69 #include "utils.h"
  70 #include "log.h"
  71 #ifdef USE_GNUTLS
  72 #  include "ssl.h"
  73 #endif
  74
  75 #if USE_GIO
  76 #error USE_GIO is currently not supported
  77 #endif
  78
  79 #if G_IO_WIN32
  80 #define BUFFSIZE        8191
  81 #else
  82 #define BUFFSIZE        8192
  83 #endif
  84
  85
  86 typedef gint (*SockAddrFunc)    (GList          *addr_list,
  87                                  gpointer        data);
  88
  89 typedef struct _SockConnectData SockConnectData;
  90 typedef struct _SockLookupData  SockLookupData;
  91 typedef struct _SockAddrData    SockAddrData;
  92 typedef struct _SockSource      SockSource;
  93
  94 struct _SockConnectData {
  95         gint id;
  96         gchar *hostname;
  97         gushort port;
  98         GList *addr_list;
  99         GList *cur_addr;
 100         SockLookupData *lookup_data;
 101         GIOChannel *channel;
 102         guint io_tag;
 103         SockConnectFunc func;
 104         gpointer data;
 105         gchar *canonical_name;
 106 };
 107
 108 struct _SockLookupData {
 109         gchar *hostname;
 110         pid_t child_pid;
 111         GIOChannel *channel;
 112         guint io_tag;
 113         SockAddrFunc func;
 114         gpointer data;
 115         gushort port;
 116         gint pipe_fds[2];
 117         gchar *canonical_name;
 118 };
 119
 120 struct _SockAddrData {
 121         gint family;
 122         gint socktype;
 123         gint protocol;
 124         gint addr_len;
 125         struct sockaddr *addr;
 126 };
 127
 128 struct _SockSource {
 129         GSource parent;
 130         SockInfo *sock;
 131 };
 132
 133 static guint io_timeout = 60;
 134
 135 static GList *sock_connect_data_list = NULL;
 136
 137 static gboolean ssl_sock_prepare        (GSource        *source,
 138                                          gint           *timeout);
 139 static gboolean ssl_sock_check          (GSource        *source);
 140 static gboolean ssl_sock_dispatch       (GSource        *source,
 141                                          GSourceFunc     callback,
 142                                          gpointer        user_data);
 143
 144 #ifdef USE_GNUTLS
 145 GSourceFuncs ssl_watch_funcs = {
 146         ssl_sock_prepare,
 147         ssl_sock_check,
 148         ssl_sock_dispatch,
 149         NULL,
 150         NULL,
 151         NULL
 152 };
 153 #endif
 154
 155 static gint sock_connect_with_timeout   (gint                    sock,
 156                                          const struct sockaddr  *serv_addr,
 157                                          gint                    addrlen,
 158                                          guint                   timeout_secs);
 159
 160 static gint sock_connect_by_getaddrinfo (const gchar    *hostname,
 161                                          gushort         port);
 162
 163 static SockInfo *sockinfo_from_fd(const gchar *hostname,
 164                                   gushort port,
 165                                   gint sock);
 166 static void sock_address_list_free              (GList          *addr_list);
 167
 168 static gboolean sock_connect_async_cb           (GIOChannel     *source,
 169                                                  GIOCondition    condition,
 170                                                  gpointer        data);
 171 static gint sock_connect_async_get_address_info_cb
 172                                                 (GList          *addr_list,
 173                                                  gpointer        data);
 174
 175 static gint sock_connect_address_list_async     (SockConnectData *conn_data);
 176
 177 static gboolean sock_get_address_info_async_cb  (GIOChannel     *source,
 178                                                  GIOCondition    condition,
 179                                                  gpointer        data);
 180 static SockLookupData *sock_get_address_info_async
 181                                                 (const gchar    *hostname,
 182                                                  gushort         port,
 183                                                  SockAddrFunc    func,
 184                                                  gpointer        data);
 185 static gint sock_get_address_info_async_cancel  (SockLookupData *lookup_data);
 186
 187
 188 gint sock_init(void)
 189 {
 190 #ifdef G_OS_WIN32
 191         WSADATA wsadata;
 192         gint result;
 193
 194         result = WSAStartup(MAKEWORD(2, 2), &wsadata);
 195         if (result != NO_ERROR) {
 196                 g_warning("WSAStartup() failed");
 197                 return -1;
 198         }
 199 #endif
 200         return 0;
 201 }
 202
 203 gint sock_cleanup(void)
 204 {
 205 #ifdef G_OS_WIN32
 206         WSACleanup();
 207 #endif
 208         return 0;
 209 }
 210
 211 gint sock_set_io_timeout(guint sec)
 212 {
 213         io_timeout = sec;
 214         return 0;
 215 }
 216
 217 void refresh_resolvers(void)
 218 {
 219 #ifdef G_OS_UNIX
 220         static time_t resolv_conf_changed = (time_t)NULL;
 221         GStatBuf s;
 222
 223         /* This makes the glibc re-read resolv.conf, if it changed
 224          * since our startup. Maybe that should be #ifdef'ed, I don't
 225          * know if it'd work on BSDs.
 226          * Why doesn't the glibc do it by itself?
 227          */
 228         if (g_stat(_PATH_RESCONF, &s) == 0) {
 229                 if (s.st_mtime > resolv_conf_changed) {
 230                         resolv_conf_changed = s.st_mtime;
 231                         res_init();
 232                 }
 233         } /* else
 234                 we'll have bigger problems. */
 235 #endif /*G_OS_UNIX*/
 236 }
 237
 238 #ifdef G_OS_WIN32
 239 #define SOCKET_IS_VALID(s)      ((s) != INVALID_SOCKET)
 240 #else
 241 #define SOCKET_IS_VALID(s)      (s != -1)
 242 #endif
 243
 244 /* Due to the fact that socket under Windows are not represented by
 245    standard file descriptors, we sometimes need to check whether a
 246    given file descriptor is actually a socket.  This is done by
 247    testing for an error.  Returns true under W32 if FD is a socket. */
 248 static int fd_is_w32_socket(gint fd)
 249 {
 250 #ifdef G_OS_WIN32
 251         gint optval;
 252         gint retval = sizeof(optval);
 253
 254         return !getsockopt(fd, SOL_SOCKET, SO_TYPE, (char*)&optval, &retval);
 255 #else
 256         return 0;
 257 #endif
 258 }
 259
 260 gint fd_connect_inet(gushort port)
 261 {
 262         gint sock;
 263         struct sockaddr_in addr;
 264
 265         sock = socket(AF_INET, SOCK_STREAM, 0);
 266         if (!SOCKET_IS_VALID(sock)) {
 267 #ifdef G_OS_WIN32
 268                 debug_print("fd_connect_inet(): socket() failed: %d\n",
 269                           WSAGetLastError());
 270 #else
 271                 perror("fd_connect_inet(): socket");
 272 #endif
 273                 return -1;
 274         }
 275
 276         memset(&addr, 0, sizeof(addr));
 277         addr.sin_family = AF_INET;
 278         addr.sin_port = htons(port);
 279         addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 280
 281         if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 282                 fd_close(sock);
 283                 return -1;
 284         }
 285
 286         return sock;
 287 }
 288 gint fd_open_inet(gushort port)
 289 {
 290         gint sock;
 291         struct sockaddr_in addr;
 292         gint val;
 293
 294         sock = socket(AF_INET, SOCK_STREAM, 0);
 295         if (!SOCKET_IS_VALID(sock)) {
 296 #ifdef G_OS_WIN32
 297                 g_warning("fd_open_inet(): socket() failed: %d",
 298                           WSAGetLastError());
 299 #else
 300                 perror("fd_open_inet(): socket");
 301 #endif
 302                 return -1;
 303         }
 304
 305         val = 1;
 306         if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (char *)&val,
 307                        sizeof(val)) < 0) {
 308                 perror("setsockopt");
 309                 fd_close(sock);
 310                 return -1;
 311         }
 312
 313         memset(&addr, 0, sizeof(addr));
 314         addr.sin_family = AF_INET;
 315         addr.sin_port = htons(port);
 316         addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
 317
 318         if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 319                 perror("bind");
 320                 fd_close(sock);
 321                 return -1;
 322         }
 323
 324         if (listen(sock, 1) < 0) {
 325                 perror("listen");
 326                 fd_close(sock);
 327                 return -1;
 328         }
 329
 330         return sock;
 331 }
 332
 333 gint fd_connect_unix(const gchar *path)
 334 {
 335 #ifdef G_OS_UNIX
 336         gint sock;
 337         struct sockaddr_un addr;
 338
 339         sock = socket(PF_UNIX, SOCK_STREAM, 0);
 340         if (sock < 0) {
 341                 perror("sock_connect_unix(): socket");
 342                 return -1;
 343         }
 344
 345         memset(&addr, 0, sizeof(addr));
 346         addr.sun_family = AF_UNIX;
 347         strncpy(addr.sun_path, path, sizeof(addr.sun_path) - 1);
 348
 349         if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 350                 close(sock);
 351                 return -1;
 352         }
 353
 354         return sock;
 355 #else
 356         return -1;
 357 #endif
 358 }
 359
 360 gint fd_open_unix(const gchar *path)
 361 {
 362 #ifdef G_OS_UNIX
 363         gint sock;
 364         struct sockaddr_un addr;
 365
 366         sock = socket(PF_UNIX, SOCK_STREAM, 0);
 367
 368         if (sock < 0) {
 369                 perror("sock_open_unix(): socket");
 370                 return -1;
 371         }
 372
 373         memset(&addr, 0, sizeof(addr));
 374         addr.sun_family = AF_UNIX;
 375         strncpy(addr.sun_path, path, sizeof(addr.sun_path) - 1);
 376
 377         if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
 378                 gchar *buf = g_strdup_printf("can't bind to %s", path);
 379                 perror(buf);
 380                 g_free(buf);
 381                 close(sock);
 382                 return -1;
 383         }
 384
 385         if (listen(sock, 1) < 0) {
 386                 gchar *buf = g_strdup_printf("can't listen on %s", path);
 387                 perror(buf);
 388                 g_free(buf);
 389                 close(sock);
 390                 return -1;
 391         }
 392
 393         return sock;
 394 #else
 395         return -1;
 396 #endif
 397 }
 398
 399 gint fd_accept(gint sock)
 400 {
 401         struct sockaddr_in caddr;
 402         guint caddr_len;
 403
 404         caddr_len = sizeof(caddr);
 405         return accept(sock, (struct sockaddr *)&caddr, &caddr_len);
 406 }
 407
 408
 409 static gint set_nonblocking_mode(gint fd, gboolean nonblock)
 410 {
 411 #ifdef G_OS_UNIX
 412         gint flags;
 413
 414         flags = fcntl(fd, F_GETFL, 0);
 415         if (flags < 0) {
 416                 perror("fcntl");
 417                 return -1;
 418         }
 419
 420         if (nonblock)
 421                 flags |= O_NONBLOCK;
 422         else
 423                 flags &= ~O_NONBLOCK;
 424
 425         return fcntl(fd, F_SETFL, flags);
 426 #else
 427         return -1;
 428 #endif
 429 }
 430
 431 gint sock_set_nonblocking_mode(SockInfo *sock, gboolean nonblock)
 432 {
 433         cm_return_val_if_fail(sock != NULL, -1);
 434
 435         return set_nonblocking_mode(sock->sock, nonblock);
 436 }
 437
 438 static gboolean is_nonblocking_mode(gint fd)
 439 {
 440 #ifdef G_OS_UNIX
 441         gint flags;
 442
 443         flags = fcntl(fd, F_GETFL, 0);
 444         if (flags < 0) {
 445                 perror("fcntl");
 446                 return FALSE;
 447         }
 448
 449         return ((flags & O_NONBLOCK) != 0);
 450 #else
 451         return FALSE;
 452 #endif
 453 }
 454
 455 gboolean sock_is_nonblocking_mode(SockInfo *sock)
 456 {
 457         cm_return_val_if_fail(sock != NULL, FALSE);
 458
 459         return is_nonblocking_mode(sock->sock);
 460 }
 461
 462
 463 #ifdef USE_GNUTLS
 464 static gboolean ssl_sock_prepare(GSource *source, gint *timeout)
 465 {
 466         *timeout = 1;
 467         return FALSE;
 468 }
 469
 470 static gboolean ssl_sock_check(GSource *source)
 471 {
 472         SockInfo *sock = ((SockSource *)source)->sock;
 473         struct timeval timeout = {0, 0};
 474         fd_set fds;
 475         GIOCondition condition = 0;
 476
 477         if (!sock || !sock->sock)
 478                 return FALSE;
 479
 480         condition = sock->condition;
 481
 482         if ((condition & G_IO_IN) == G_IO_IN &&
 483             gnutls_record_check_pending(sock->ssl) != 0)
 484                 return TRUE;
 485
 486         FD_ZERO(&fds);
 487         FD_SET(sock->sock, &fds);
 488
 489         select(sock->sock + 1,
 490                (condition & G_IO_IN)  ? &fds : NULL,
 491                (condition & G_IO_OUT) ? &fds : NULL,
 492                NULL, &timeout);
 493
 494         return FD_ISSET(sock->sock, &fds) != 0;
 495 }
 496
 497 static gboolean ssl_sock_dispatch(GSource *source, GSourceFunc callback,
 498                               gpointer user_data)
 499 {
 500         SockInfo *sock = ((SockSource *)source)->sock;
 501
 502         if (!sock || !sock->callback || !sock->data)
 503                 return FALSE;
 504
 505         return sock->callback(sock, sock->condition, sock->data);
 506 }
 507 #endif
 508
 509 static gboolean sock_watch_cb(GIOChannel *source, GIOCondition condition,
 510                               gpointer data)
 511 {
 512         SockInfo *sock = (SockInfo *)data;
 513
 514         if ((condition & sock->condition) == 0)
 515                 return TRUE;
 516
 517         return sock->callback(sock, sock->condition, sock->data);
 518 }
 519
 520 guint sock_add_watch(SockInfo *sock, GIOCondition condition, SockFunc func,
 521                      gpointer data)
 522 {
 523         if (!sock)
 524                 return FALSE;
 525
 526         sock->callback = func;
 527         sock->condition = condition;
 528         sock->data = data;
 529
 530 #ifdef USE_GNUTLS
 531         if (sock->ssl)
 532         {
 533                 GSource *source = g_source_new(&ssl_watch_funcs,
 534                                                sizeof(SockSource));
 535                 ((SockSource *) source)->sock = sock;
 536                 g_source_set_priority(source, G_PRIORITY_DEFAULT);
 537                 g_source_set_can_recurse(source, FALSE);
 538                 sock->g_source = g_source_attach(source, NULL);
 539                 g_source_unref (source); /* Refcount back down to 1 */
 540                 return sock->g_source;
 541         }
 542 #endif
 543
 544         return g_io_add_watch(sock->sock_ch, condition, sock_watch_cb, sock);
 545 }
 546
 547 static gint fd_check_io(gint fd, GIOCondition cond)
 548 {
 549         struct timeval timeout;
 550         fd_set fds;
 551
 552         if (is_nonblocking_mode(fd))
 553                 return 0;
 554
 555         timeout.tv_sec  = io_timeout;
 556         timeout.tv_usec = 0;
 557
 558         FD_ZERO(&fds);
 559         FD_SET(fd, &fds);
 560
 561         if (cond == G_IO_IN) {
 562                 select(fd + 1, &fds, NULL, NULL,
 563                        io_timeout > 0 ? &timeout : NULL);
 564         } else {
 565                 select(fd + 1, NULL, &fds, NULL,
 566                        io_timeout > 0 ? &timeout : NULL);
 567         }
 568
 569         if (FD_ISSET(fd, &fds)) {
 570                 return 0;
 571         } else {
 572                 g_warning("Socket IO timeout");
 573                 log_error(LOG_PROTOCOL, _("Socket IO timeout.\n"));
 574                 return -1;
 575         }
 576 }
 577
 578 #ifdef G_OS_UNIX
 579 static sigjmp_buf jmpenv;
 580
 581 static void timeout_handler(gint sig)
 582 {
 583         siglongjmp(jmpenv, 1);
 584 }
 585 #endif /*G_OS_UNIX*/
 586
 587 static gint sock_connect_with_timeout(gint sock,
 588                                       const struct sockaddr *serv_addr,
 589                                       gint addrlen,
 590                                       guint timeout_secs)
 591 {
 592         gint ret, saved_errno;
 593 #ifdef G_OS_UNIX
 594         void (*prev_handler)(gint);
 595
 596         alarm(0);
 597         prev_handler = signal(SIGALRM, timeout_handler);
 598         if (sigsetjmp(jmpenv, 1)) {
 599                 alarm(0);
 600                 signal(SIGALRM, prev_handler);
 601                 errno = ETIMEDOUT;
 602                 log_error(LOG_PROTOCOL, _("Connection timed out.\n"));
 603                 return -1;
 604         }
 605         alarm(timeout_secs);
 606 #endif
 607
 608         ret = connect(sock, serv_addr, addrlen);
 609         saved_errno = errno;
 610
 611         if (ret == -1) {
 612                 debug_print("connect() failed: %d (%s)\n",
 613                                 saved_errno, g_strerror(saved_errno));
 614         }
 615
 616 #ifdef G_OS_UNIX
 617         alarm(0);
 618         signal(SIGALRM, prev_handler);
 619 #endif
 620
 621         return ret;
 622 }
 623
 624 static gint sock_connect_by_getaddrinfo(const gchar *hostname, gushort  port)
 625 {
 626         gint sock = -1, gai_error;
 627         struct addrinfo hints, *res, *ai;
 628         gchar port_str[6];
 629
 630         refresh_resolvers();
 631
 632         memset(&hints, 0, sizeof(hints));
 633         hints.ai_flags = AI_ADDRCONFIG;
 634
 635 #ifdef INET6
 636         hints.ai_family = AF_UNSPEC;
 637 #else
 638         hints.ai_family = AF_INET;
 639 #endif
 640
 641         hints.ai_socktype = SOCK_STREAM;
 642         hints.ai_protocol = IPPROTO_TCP;
 643
 644         /* convert port from integer to string. */
 645         g_snprintf(port_str, sizeof(port_str), "%d", port);
 646
 647         if ((gai_error = getaddrinfo(hostname, port_str, &hints, &res)) != 0) {
 648                 g_printerr("getaddrinfo for %s:%s failed: %s\n",
 649                         hostname, port_str, gai_strerror(gai_error));
 650                 return -1;
 651         }
 652
 653         for (ai = res; ai != NULL; ai = ai->ai_next) {
 654 #ifndef INET6
 655                 if (ai->ai_family == AF_INET6)
 656                         continue;
 657 #endif
 658
 659                 sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
 660                 if (sock < 0 )
 661                         continue;
 662 #ifdef G_OS_WIN32
 663                 if (sock == INVALID_SOCKET)
 664                         continue;
 665 #endif
 666
 667                 if (sock_connect_with_timeout
 668                         (sock, ai->ai_addr, ai->ai_addrlen, io_timeout) == 0)
 669                         break;
 670
 671                 close(sock);
 672         }
 673
 674         if (res != NULL)
 675                 freeaddrinfo(res);
 676
 677         if (ai == NULL)
 678                 return -1;
 679
 680         return sock;
 681 }
 682
 683 SockInfo *sock_connect(const gchar *hostname, gushort port)
 684 {
 685 #ifdef G_OS_WIN32
 686         SOCKET sock;
 687 #else
 688         gint sock;
 689 #endif
 690
 691         if ((sock = sock_connect_by_getaddrinfo(hostname, port)) < 0) {
 692                 return NULL;
 693         }
 694
 695         return sockinfo_from_fd(hostname, port, sock);
 696 }
 697
 698
 699 static void sock_address_list_free(GList *addr_list)
 700 {
 701         GList *cur;
 702
 703         for (cur = addr_list; cur != NULL; cur = cur->next) {
 704                 SockAddrData *addr_data = (SockAddrData *)cur->data;
 705                 g_free(addr_data->addr);
 706                 g_free(addr_data);
 707         }
 708
 709         g_list_free(addr_list);
 710 }
 711
 712 /* asynchronous TCP connection */
 713
 714 static gboolean sock_connect_async_cb(GIOChannel *source,
 715                                       GIOCondition condition, gpointer data)
 716 {
 717         SockConnectData *conn_data = (SockConnectData *)data;
 718         gint fd;
 719         gint val;
 720         guint len;
 721         SockInfo *sockinfo;
 722
 723         if (conn_data->io_tag == 0 && conn_data->channel == NULL)
 724                 return FALSE;
 725
 726         fd = g_io_channel_unix_get_fd(source);
 727
 728         conn_data->io_tag = 0;
 729         conn_data->channel = NULL;
 730         g_io_channel_unref(source);
 731
 732         len = sizeof(val);
 733         if (getsockopt(fd, SOL_SOCKET, SO_ERROR, (void*)&val, &len) < 0) {
 734                 perror("getsockopt");
 735                 close(fd);
 736                 sock_connect_address_list_async(conn_data);
 737                 return FALSE;
 738         }
 739
 740         if (val != 0) {
 741                 close(fd);
 742                 log_error(LOG_PROTOCOL, _("%s:%d: connection failed (%s).\n"),
 743                           conn_data->hostname, conn_data->port,
 744                           g_strerror(val));
 745                 sock_connect_address_list_async(conn_data);
 746                 return FALSE;
 747         }
 748
 749         sockinfo = g_new0(SockInfo, 1);
 750         sockinfo->sock = fd;
 751 #ifndef G_OS_WIN32
 752         sockinfo->sock_ch = g_io_channel_unix_new(fd);
 753 #else
 754         sockinfo->sock_ch = g_io_channel_win32_new_socket(fd);
 755 #endif
 756         sockinfo->hostname = g_strdup(conn_data->hostname);
 757         sockinfo->port = conn_data->port;
 758         sockinfo->state = CONN_ESTABLISHED;
 759         sockinfo->canonical_name = g_strdup(conn_data->canonical_name);
 760
 761         conn_data->func(sockinfo, conn_data->data);
 762
 763         sock_connect_async_cancel(conn_data->id);
 764
 765         return FALSE;
 766 }
 767
 768 static gint sock_connect_async_get_address_info_cb(GList *addr_list,
 769                                                    gpointer data)
 770 {
 771         SockConnectData *conn_data = (SockConnectData *)data;
 772
 773         conn_data->addr_list = addr_list;
 774         conn_data->cur_addr = addr_list;
 775         if (conn_data->lookup_data) {
 776                 conn_data->canonical_name = conn_data->lookup_data->canonical_name;
 777                 conn_data->lookup_data->canonical_name = NULL;
 778                 conn_data->lookup_data = NULL;
 779         }
 780         return sock_connect_address_list_async(conn_data);
 781 }
 782
 783 gint sock_connect_async(const gchar *hostname, gushort port,
 784                         SockConnectFunc func, gpointer data)
 785 {
 786         static gint id = 1;
 787         SockConnectData *conn_data;
 788
 789         conn_data = g_new0(SockConnectData, 1);
 790         conn_data->id = id++;
 791         conn_data->hostname = g_strdup(hostname);
 792         conn_data->port = port;
 793         conn_data->addr_list = NULL;
 794         conn_data->cur_addr = NULL;
 795         conn_data->io_tag = 0;
 796         conn_data->func = func;
 797         conn_data->data = data;
 798
 799         conn_data->lookup_data = sock_get_address_info_async
 800                 (hostname, port, sock_connect_async_get_address_info_cb,
 801                  conn_data);
 802
 803         if (conn_data->lookup_data == NULL) {
 804                 g_free(conn_data->hostname);
 805                 g_free(conn_data);
 806                 return -1;
 807         }
 808
 809         sock_connect_data_list = g_list_append(sock_connect_data_list,
 810                                                conn_data);
 811
 812         return conn_data->id;
 813 }
 814
 815 gint sock_connect_async_cancel(gint id)
 816 {
 817         SockConnectData *conn_data = NULL;
 818         GList *cur;
 819
 820         for (cur = sock_connect_data_list; cur != NULL; cur = cur->next) {
 821                 if (((SockConnectData *)cur->data)->id == id) {
 822                         conn_data = (SockConnectData *)cur->data;
 823                         break;
 824                 }
 825         }
 826
 827         if (conn_data) {
 828                 sock_connect_data_list = g_list_remove(sock_connect_data_list,
 829                                                        conn_data);
 830
 831                 if (conn_data->lookup_data)
 832                         sock_get_address_info_async_cancel
 833                                 (conn_data->lookup_data);
 834
 835                 if (conn_data->io_tag > 0)
 836                         g_source_remove(conn_data->io_tag);
 837                 if (conn_data->channel) {
 838                         GError *err = NULL;
 839                         g_io_channel_shutdown(conn_data->channel, TRUE, &err);
 840                         if (err)
 841                                 g_error_free(err);
 842                         g_io_channel_unref(conn_data->channel);
 843                 }
 844
 845                 sock_address_list_free(conn_data->addr_list);
 846                 g_free(conn_data->canonical_name);
 847                 g_free(conn_data->hostname);
 848                 g_free(conn_data);
 849         } else {
 850                 g_warning("sock_connect_async_cancel: id %d not found", id);
 851                 return -1;
 852         }
 853
 854         return 0;
 855 }
 856
 857 static gint sock_connect_address_list_async(SockConnectData *conn_data)
 858 {
 859         SockAddrData *addr_data;
 860         gint sock = -1;
 861
 862         for (; conn_data->cur_addr != NULL;
 863              conn_data->cur_addr = conn_data->cur_addr->next) {
 864                 addr_data = (SockAddrData *)conn_data->cur_addr->data;
 865
 866                 if ((sock = socket(addr_data->family, addr_data->socktype,
 867                                    addr_data->protocol)) < 0) {
 868                         perror("socket");
 869
 870                         continue;
 871                 }
 872
 873                 set_nonblocking_mode(sock, TRUE);
 874
 875                 if (connect(sock, addr_data->addr, addr_data->addr_len) < 0) {
 876                         if (EINPROGRESS == errno) {
 877                                 break;
 878                         } else {
 879                                 perror("connect");
 880                                 close(sock);
 881                         }
 882                 } else {
 883                         break;
 884                 }
 885         }
 886
 887         if (conn_data->cur_addr == NULL) {
 888                 conn_data->func(NULL, conn_data->data);
 889                 sock_connect_async_cancel(conn_data->id);
 890                 return -1;
 891         }
 892
 893         conn_data->cur_addr = conn_data->cur_addr->next;
 894
 895 #ifndef G_OS_WIN32
 896         conn_data->channel = g_io_channel_unix_new(sock);
 897 #else
 898         conn_data->channel = g_io_channel_win32_new_socket(sock);
 899 #endif
 900         conn_data->io_tag = g_io_add_watch(conn_data->channel, G_IO_IN|G_IO_OUT,
 901                                            sock_connect_async_cb, conn_data);
 902
 903         return 0;
 904 }
 905
 906 /* asynchronous DNS lookup */
 907
 908 static gboolean sock_get_address_info_async_cb(GIOChannel *source,
 909                                                GIOCondition condition,
 910                                                gpointer data)
 911 {
 912         SockLookupData *lookup_data = (SockLookupData *)data;
 913         GList *addr_list = NULL;
 914         SockAddrData *addr_data;
 915         gsize bytes_read;
 916         gint ai_member[4];
 917         struct sockaddr *addr;
 918         gchar *canonical_name = NULL;
 919         gchar len = 0;
 920         GError *err = NULL;
 921
 922         g_io_channel_set_encoding(source, NULL, &err);
 923         if (err) {
 924                 g_warning("can unset encoding: %s", err->message);
 925                 g_error_free(err);
 926                 return FALSE;
 927         }
 928         g_io_channel_set_buffered(source, FALSE);
 929         if (g_io_channel_read_chars(source, &len, sizeof(len),
 930                               &bytes_read, &err) == G_IO_STATUS_NORMAL) {
 931                 if (err != NULL) {
 932                         g_warning("g_io_channel_read_chars: %s", err->message);
 933                         g_error_free(err);
 934                         return FALSE;
 935                 }
 936                 if (bytes_read == sizeof(len) && len > 0) {
 937                         gchar *cur = NULL;
 938                         gint todo = len;
 939                         canonical_name = g_malloc0(len + 1);
 940                         cur = canonical_name;
 941                         while (todo > 0) {
 942                                 if (g_io_channel_read_chars(source, cur, todo,
 943                                       &bytes_read, &err) != G_IO_STATUS_NORMAL) {
 944                                         if (err) {
 945                                               g_warning("canonical name not read %s", err->message);
 946                                               g_free(canonical_name);
 947                                               canonical_name = NULL;
 948                                               g_error_free(err);
 949                                               err = NULL;
 950                                               break;
 951                                         }
 952                                 } else {
 953                                         cur += bytes_read;
 954                                         todo -= bytes_read;
 955                                 }
 956                                 if (bytes_read == 0) {
 957                                       g_warning("canonical name not read");
 958                                       g_free(canonical_name);
 959                                       canonical_name = NULL;
 960                                       break;
 961                                 }
 962                         }
 963                 }
 964         }
 965         for (;;) {
 966                 if (g_io_channel_read_chars(source, (gchar *)ai_member,
 967                                       sizeof(ai_member), &bytes_read, &err)
 968                     != G_IO_STATUS_NORMAL) {
 969                         if (err != NULL) {
 970                                 g_warning("g_io_channel_read_chars: addr len %s", err->message);
 971                                 g_error_free(err);
 972                                 err = NULL;
 973                                 break;
 974                         }
 975                 }
 976
 977                 if (bytes_read == 0 || bytes_read != sizeof(ai_member))
 978                         break;
 979
 980                 if (ai_member[0] == AF_UNSPEC) {
 981                         g_warning("DNS lookup failed");
 982                         log_error(LOG_PROTOCOL, _("%s:%d: unknown host.\n"),
 983                                 lookup_data->hostname, lookup_data->port);
 984                         break;
 985                 }
 986
 987                 addr = g_malloc(ai_member[3]);
 988                 if (g_io_channel_read_chars(source, (gchar *)addr, ai_member[3],
 989                                       &bytes_read, &err)
 990                     != G_IO_STATUS_NORMAL) {
 991                         if (err != NULL) {
 992                                 g_warning("g_io_channel_read_chars: addr data read %s", err->message);
 993                                 g_error_free(err);
 994                                 err = NULL;
 995                                 g_free(addr);
 996                                 break;
 997                         }
 998                 }
 999
1000                 if (bytes_read != ai_member[3]) {
1001                         g_warning("sock_get_address_info_async_cb: "
1002                                   "incomplete address data");
1003                         g_free(addr);
1004                         break;
1005                 }
1006
1007                 addr_data = g_new0(SockAddrData, 1);
1008                 addr_data->family = ai_member[0];
1009                 addr_data->socktype = ai_member[1];
1010                 addr_data->protocol = ai_member[2];
1011                 addr_data->addr_len = ai_member[3];
1012                 addr_data->addr = addr;
1013
1014                 addr_list = g_list_append(addr_list, addr_data);
1015         }
1016
1017         g_io_channel_shutdown(source, TRUE, &err);
1018         if (err)
1019                 g_error_free(err);
1020         g_io_channel_unref(source);
1021
1022 #ifdef G_OS_WIN32
1023         /* FIXME: We would need to cancel the thread. */
1024 #else
1025         kill(lookup_data->child_pid, SIGKILL);
1026         waitpid(lookup_data->child_pid, NULL, 0);
1027 #endif
1028         lookup_data->canonical_name = canonical_name;
1029
1030         lookup_data->func(addr_list, lookup_data->data);
1031
1032         g_free(lookup_data->canonical_name);
1033         g_free(lookup_data->hostname);
1034         g_free(lookup_data);
1035
1036         return FALSE;
1037 }
1038
1039
1040 /* For better readability we use a separate function to implement the
1041    child code of sock_get_address_info_async.  Note, that under W32
1042    this is actually not a child but a thread and this is the reason
1043    why we pass only a void pointer. */
1044 static void address_info_async_child(void *opaque)
1045 {
1046         SockLookupData *parm = opaque;
1047         gint gai_err;
1048         struct addrinfo hints, *res, *ai;
1049         gchar port_str[6];
1050         gint ai_member[4] = {AF_UNSPEC, 0, 0, 0};
1051
1052 #ifndef G_OS_WIN32
1053         close(parm->pipe_fds[0]);
1054         parm->pipe_fds[0] = -1;
1055 #endif
1056
1057         memset(&hints, 0, sizeof(hints));
1058         hints.ai_flags = AI_CANONNAME | AI_ADDRCONFIG;
1059 #ifdef INET6
1060         hints.ai_family = AF_UNSPEC;
1061 #else
1062                                 hints.ai_family = AF_INET;
1063 #endif
1064         hints.ai_socktype = SOCK_STREAM;
1065         hints.ai_protocol = IPPROTO_TCP;
1066
1067         g_snprintf(port_str, sizeof(port_str), "%d", parm->port);
1068
1069         gai_err = getaddrinfo(parm->hostname, port_str, &hints, &res);
1070         if (gai_err != 0) {
1071                 gchar len = 0;
1072                 g_warning("getaddrinfo for %s:%s failed: %s",
1073                           parm->hostname, port_str, gai_strerror(gai_err));
1074                 log_error(LOG_PROTOCOL, _("%s:%s: host lookup failed (%s).\n"),
1075                           parm->hostname, port_str, gai_strerror(gai_err));
1076                 fd_write_all(parm->pipe_fds[1], &len,
1077                      sizeof(len));
1078                 fd_write_all(parm->pipe_fds[1], (gchar *)ai_member,
1079                              sizeof(ai_member));
1080                 close(parm->pipe_fds[1]);
1081                 parm->pipe_fds[1] = -1;
1082 #ifdef G_OS_WIN32
1083                 _endthread();
1084 #else
1085                 _exit(1);
1086 #endif
1087         }
1088
1089         if (res != NULL) {
1090                 if (res->ai_canonname && strlen(res->ai_canonname) < 255) {
1091                         gchar len = strlen(res->ai_canonname);
1092                         fd_write_all(parm->pipe_fds[1], &len,
1093                              sizeof(len));
1094                         fd_write_all(parm->pipe_fds[1], res->ai_canonname,
1095                              len);
1096                 } else {
1097                         gchar len = 0;
1098                         fd_write_all(parm->pipe_fds[1], &len,
1099                              sizeof(len));
1100                 }
1101         } else {
1102                 gchar len = 0;
1103                 fd_write_all(parm->pipe_fds[1], &len,
1104                      sizeof(len));
1105         }
1106
1107         for (ai = res; ai != NULL; ai = ai->ai_next) {
1108                 ai_member[0] = ai->ai_family;
1109                 ai_member[1] = ai->ai_socktype;
1110                 ai_member[2] = ai->ai_protocol;
1111                 ai_member[3] = ai->ai_addrlen;
1112
1113                 fd_write_all(parm->pipe_fds[1], (gchar *)ai_member,
1114                              sizeof(ai_member));
1115                 fd_write_all(parm->pipe_fds[1], (gchar *)ai->ai_addr,
1116                              ai->ai_addrlen);
1117         }
1118
1119         if (res != NULL)
1120                 freeaddrinfo(res);
1121
1122         close(parm->pipe_fds[1]);
1123         parm->pipe_fds[1] = -1;
1124
1125 #ifdef G_OS_WIN32
1126         _endthread();
1127 #else
1128         _exit(0);
1129 #endif
1130 }
1131
1132 static SockLookupData *sock_get_address_info_async(const gchar *hostname,
1133                                                    gushort port,
1134                                                    SockAddrFunc func,
1135                                                    gpointer data)
1136 {
1137         SockLookupData *lookup_data = NULL;
1138
1139         refresh_resolvers();
1140
1141         lookup_data = g_new0(SockLookupData, 1);
1142         lookup_data->hostname = g_strdup(hostname);
1143         lookup_data->func = func;
1144         lookup_data->data = data;
1145         lookup_data->port = port;
1146         lookup_data->child_pid = (pid_t)(-1);
1147         lookup_data->pipe_fds[0] = -1;
1148         lookup_data->pipe_fds[1] = -1;
1149
1150         if (pipe(lookup_data->pipe_fds) < 0) {
1151                 perror("pipe");
1152                 func(NULL, data);
1153                 g_free (lookup_data->hostname);
1154                 g_free (lookup_data);
1155                 return NULL;
1156         }
1157
1158 #ifndef G_OS_WIN32
1159         if ((lookup_data->child_pid = fork()) < 0) {
1160                 perror("fork");
1161                 func(NULL, data);
1162                 g_free (lookup_data->hostname);
1163                 g_free (lookup_data);
1164                 return NULL;
1165         }
1166
1167         if (lookup_data->child_pid == 0) {
1168                 /* Child process. */
1169                 address_info_async_child (lookup_data);
1170                 g_assert_not_reached ();
1171         }
1172         /* Parent process. */
1173         close(lookup_data->pipe_fds[1]);
1174         lookup_data->pipe_fds[1] = -1;
1175 #endif  /*!G_OS_WIN32 */
1176
1177 #ifndef G_OS_WIN32
1178         lookup_data->channel = g_io_channel_unix_new(lookup_data->pipe_fds[0]);
1179 #else
1180         lookup_data->channel = g_io_channel_win32_new_fd(lookup_data->pipe_fds[0]);
1181 #endif
1182         lookup_data->io_tag = g_io_add_watch(lookup_data->channel, G_IO_IN,
1183                                              sock_get_address_info_async_cb,
1184                                              lookup_data);
1185 #ifdef G_OS_WIN32
1186         lookup_data->child_pid = _beginthread(
1187                 address_info_async_child, 0, lookup_data);
1188 #endif
1189
1190         return lookup_data;
1191 }
1192
1193 static gint sock_get_address_info_async_cancel(SockLookupData *lookup_data)
1194 {
1195         if (lookup_data->io_tag > 0)
1196                 g_source_remove(lookup_data->io_tag);
1197         if (lookup_data->channel) {
1198                 GError *err = NULL;
1199                 g_io_channel_shutdown(lookup_data->channel, TRUE, &err);
1200                 if (err)
1201                         g_error_free(err);
1202
1203                 g_io_channel_unref(lookup_data->channel);
1204         }
1205
1206         if (lookup_data->child_pid > 0) {
1207 #ifdef G_OS_WIN32
1208                 /* FIXME: Need a way to cancel the thread. */
1209 #else
1210                 kill(lookup_data->child_pid, SIGKILL);
1211                 waitpid(lookup_data->child_pid, NULL, 0);
1212 #endif
1213         }
1214
1215         g_free(lookup_data->canonical_name);
1216         g_free(lookup_data->hostname);
1217         g_free(lookup_data);
1218
1219         return 0;
1220 }
1221
1222
1223 static SockInfo *sockinfo_from_fd(const gchar *hostname,
1224                                   gushort port,
1225                                   gint sock)
1226 {
1227         SockInfo *sockinfo;
1228
1229         sockinfo = g_new0(SockInfo, 1);
1230         sockinfo->sock = sock;
1231 #ifndef G_OS_WIN32
1232         sockinfo->sock_ch = g_io_channel_unix_new(sock);
1233 #else
1234         sockinfo->sock_ch = g_io_channel_win32_new_socket(sock);
1235 #endif
1236         sockinfo->hostname = g_strdup(hostname);
1237         sockinfo->port = port;
1238         sockinfo->state = CONN_ESTABLISHED;
1239
1240         return sockinfo;
1241 }
1242
1243 static gint fd_read(gint fd, gchar *buf, gint len)
1244 {
1245         if (fd_check_io(fd, G_IO_IN) < 0)
1246                 return -1;
1247
1248         if (fd_is_w32_socket(fd))
1249                 return recv(fd, buf, len, 0);
1250         return read(fd, buf, len);
1251 }
1252
1253 #if USE_GNUTLS
1254 static gint ssl_read(gnutls_session_t ssl, gchar *buf, gint len)
1255 {
1256         gint r;
1257
1258         if (gnutls_record_check_pending(ssl) == 0) {
1259                 if (fd_check_io(GPOINTER_TO_INT(gnutls_transport_get_ptr(ssl)), G_IO_IN) < 0)
1260                         return -1;
1261         }
1262
1263         while (1) {
1264                 r = gnutls_record_recv(ssl, buf, len);
1265                 if (r > 0)
1266                         return r;
1267
1268                 switch (r) {
1269                 case 0: /* closed connection */
1270                         return -1;
1271
1272                 case GNUTLS_E_REHANDSHAKE:
1273                         do {
1274                                 r = gnutls_handshake(ssl);
1275                         } while (r == GNUTLS_E_AGAIN || r == GNUTLS_E_INTERRUPTED);
1276                         break; /* re-receive */
1277                 case GNUTLS_E_AGAIN:
1278                 case GNUTLS_E_INTERRUPTED:
1279                         errno = EAGAIN;
1280                         return -1;
1281
1282                 default:
1283                         debug_print("Unexpected SSL/TLS read result %d\n", r);
1284                         errno = EIO;
1285                         return -1;
1286                 }
1287         }
1288
1289 }
1290 #endif
1291
1292 gint sock_read(SockInfo *sock, gchar *buf, gint len)
1293 {
1294         gint ret;
1295
1296         cm_return_val_if_fail(sock != NULL, -1);
1297
1298 #ifdef USE_GNUTLS
1299         if (sock->ssl)
1300                 ret = ssl_read(sock->ssl, buf, len);
1301         else
1302 #endif
1303                 ret = fd_read(sock->sock, buf, len);
1304
1305         if (ret < 0)
1306                 sock->state = CONN_DISCONNECTED;
1307         return ret;
1308 }
1309
1310 gint fd_write(gint fd, const gchar *buf, gint len)
1311 {
1312         if (fd_check_io(fd, G_IO_OUT) < 0)
1313                 return -1;
1314
1315         if (fd_is_w32_socket (fd))
1316                 return send(fd, buf, len, 0);
1317         return write(fd, buf, len);
1318 }
1319
1320 #if USE_GNUTLS
1321 static gint ssl_write(gnutls_session_t ssl, const gchar *buf, gint len)
1322 {
1323         gint ret;
1324
1325         if (fd_check_io(GPOINTER_TO_INT(gnutls_transport_get_ptr(ssl)), G_IO_OUT) < 0)
1326                 return -1;
1327
1328         ret = gnutls_record_send(ssl, buf, len);
1329
1330         switch (ret) {
1331         case 0:
1332                 return -1;
1333         case GNUTLS_E_AGAIN:
1334         case GNUTLS_E_INTERRUPTED:
1335                 return 0;
1336
1337         default:
1338                 return ret;
1339         }
1340 }
1341
1342 #endif
1343
1344 gint sock_write(SockInfo *sock, const gchar *buf, gint len)
1345 {
1346         gint ret;
1347
1348         cm_return_val_if_fail(sock != NULL, -1);
1349
1350 #ifdef USE_GNUTLS
1351         if (sock->ssl)
1352                 ret = ssl_write(sock->ssl, buf, len);
1353         else
1354 #endif
1355                 ret = fd_write(sock->sock, buf, len);
1356
1357         if (ret < 0)
1358                 sock->state = CONN_DISCONNECTED;
1359         return ret;
1360 }
1361
1362 gint fd_write_all(gint fd, const gchar *buf, gint len)
1363 {
1364         gint n, wrlen = 0;
1365
1366         while (len) {
1367                 if (fd_check_io(fd, G_IO_OUT) < 0)
1368                         return -1;
1369 #ifndef G_OS_WIN32
1370                 signal(SIGPIPE, SIG_IGN);
1371 #endif
1372                 if (fd_is_w32_socket(fd))
1373                         n = send(fd, buf, len, 0);
1374                 else
1375                         n = write(fd, buf, len);
1376
1377                 if (n <= 0) {
1378                         log_error(LOG_PROTOCOL, _("write on fd%d: %s\n"), fd, g_strerror(errno));
1379                         return -1;
1380                 }
1381                 len -= n;
1382                 wrlen += n;
1383                 buf += n;
1384         }
1385
1386         return wrlen;
1387 }
1388
1389 #ifdef USE_GNUTLS
1390 static gint ssl_write_all(gnutls_session_t ssl, const gchar *buf, gint len)
1391 {
1392         gint n, wrlen = 0;
1393
1394         while (len) {
1395                 n = ssl_write(ssl, buf, len);
1396                 if (n <= 0)
1397                         return -1;
1398                 len -= n;
1399                 wrlen += n;
1400                 buf += n;
1401         }
1402
1403         return wrlen;
1404 }
1405 #endif
1406
1407 gint sock_write_all(SockInfo *sock, const gchar *buf, gint len)
1408 {
1409         gint ret;
1410
1411         cm_return_val_if_fail(sock != NULL, -1);
1412
1413 #ifdef USE_GNUTLS
1414         if (sock->ssl)
1415                 ret = ssl_write_all(sock->ssl, buf, len);
1416         else
1417 #endif
1418                 ret = fd_write_all(sock->sock, buf, len);
1419
1420         if (ret < 0)
1421                 sock->state = CONN_DISCONNECTED;
1422         return ret;
1423 }
1424
1425 static gint fd_recv(gint fd, gchar *buf, gint len, gint flags)
1426 {
1427         if (fd_check_io(fd, G_IO_IN) < 0)
1428                 return -1;
1429
1430         return recv(fd, buf, len, flags);
1431 }
1432
1433 gint fd_gets(gint fd, gchar *buf, gint len)
1434 {
1435         gchar *bp = buf;
1436
1437         if (--len < 1)
1438                 return -1;
1439
1440 #ifdef G_OS_WIN32
1441         fd_check_io(fd, G_IO_IN);
1442         do {
1443 /*
1444 XXX:tm try nonblock
1445 MSKB Article ID: Q147714
1446 Windows Sockets 2 Service Provider Interface Limitations
1447 Polling with recv(MSG_PEEK) to determine when a complete message
1448 has arrived.
1449     Reason and Workaround not available.
1450
1451 Single-byte send() and recv().
1452     Reason: Couple one-byte sends with Nagle disabled.
1453     Workaround: Send modest amounts and receive as much as possible.
1454 (still unused)
1455 */
1456                 if (recv(fd, bp, 1, 0) <= 0)
1457                         return -1;
1458                 if (*bp == '\n')
1459                         break;
1460                 bp++;
1461                 len--;
1462         } while (0 < len);
1463 #else /*!G_OS_WIN32*/
1464         gchar *newline;
1465         gint n;
1466         do {
1467                 if ((n = fd_recv(fd, bp, len, MSG_PEEK)) <= 0)
1468                         return -1;
1469                 if ((newline = memchr(bp, '\n', n)) != NULL)
1470                         n = newline - bp + 1;
1471                 if ((n = fd_read(fd, bp, n)) < 0)
1472                         return -1;
1473                 bp += n;
1474                 len -= n;
1475         } while (!newline && len);
1476 #endif /*!G_OS_WIN32*/
1477
1478         *bp = '\0';
1479         return bp - buf;
1480 }
1481
1482 gint sock_close(SockInfo *sock)
1483 {
1484         gint ret;
1485
1486         if (!sock)
1487                 return 0;
1488
1489         if (sock->sock_ch)
1490                 g_io_channel_unref(sock->sock_ch);
1491
1492 #ifdef USE_GNUTLS
1493         if (sock->ssl)
1494                 ssl_done_socket(sock);
1495         if (sock->g_source != 0 && g_main_context_find_source_by_id(NULL, sock->g_source) != NULL)
1496                 g_source_remove(sock->g_source);
1497         sock->g_source = 0;
1498 #endif
1499 #ifdef G_OS_WIN32
1500         shutdown(sock->sock, 1); /* complete transfer before close */
1501         ret = closesocket(sock->sock);
1502 #else
1503         ret = fd_close(sock->sock);
1504 #endif
1505
1506         g_free(sock->canonical_name);
1507         g_free(sock->hostname);
1508         g_free(sock);
1509
1510         return ret;
1511 }
1512
1513 gint fd_close(gint fd)
1514 {
1515         return close(fd);
1516 }