src/common/session.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2004 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 2 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, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #endif
  23
  24 #include "defs.h"
  25
  26 #include <glib.h>
  27
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <sys/types.h>
  32 #include <unistd.h>
  33 #include <sys/signal.h>
  34 #include <sys/wait.h>
  35 #include <sys/time.h>
  36 #include <time.h>
  37 #include <errno.h>
  38
  39 #include "session.h"
  40 #include "utils.h"
  41
  42 static gint session_connect_cb          (SockInfo       *sock,
  43                                          gpointer        data);
  44 static gint session_close               (Session        *session);
  45
  46 static gboolean session_timeout_cb      (gpointer        data);
  47
  48 static gboolean session_recv_msg_idle_cb        (gpointer        data);
  49 static gboolean session_recv_data_idle_cb       (gpointer        data);
  50
  51 static gboolean session_read_msg_cb     (SockInfo       *source,
  52                                          GIOCondition    condition,
  53                                          gpointer        data);
  54 static gboolean session_read_data_cb    (SockInfo       *source,
  55                                          GIOCondition    condition,
  56                                          gpointer        data);
  57 static gboolean session_write_msg_cb    (SockInfo       *source,
  58                                          GIOCondition    condition,
  59                                          gpointer        data);
  60 static gboolean session_write_data_cb   (SockInfo       *source,
  61                                          GIOCondition    condition,
  62                                          gpointer        data);
  63
  64
  65 void session_init(Session *session)
  66 {
  67         session->type = SESSION_UNKNOWN;
  68         session->sock = NULL;
  69         session->server = NULL;
  70         session->port = 0;
  71 #if USE_OPENSSL
  72         session->ssl_type = SSL_NONE;
  73 #endif
  74         session->nonblocking = TRUE;
  75         session->state = SESSION_READY;
  76         session->last_access_time = time(NULL);
  77
  78         gettimeofday(&session->tv_prev, NULL);
  79
  80         session->conn_id = 0;
  81
  82         session->io_tag = 0;
  83
  84         session->read_buf_p = session->read_buf;
  85         session->read_buf_len = 0;
  86
  87         session->read_msg_buf = g_string_sized_new(1024);
  88         session->read_data_buf = g_byte_array_new();
  89
  90         session->write_buf = NULL;
  91         session->write_buf_p = NULL;
  92         session->write_buf_len = 0;
  93
  94         session->timeout_tag = 0;
  95         session->timeout_interval = 0;
  96
  97         session->data = NULL;
  98 }
  99
 100 /*!
 101  *\brief        Set up parent and child process
 102  *              Childloop: Read commands from parent,
 103  *              send to server, get answer, pass to parent
 104  *
 105  *\param        session Contains session information
 106  *              server to connect to
 107  *              port to connect to
 108  *
 109  *\return        0 : success
 110  *              -1 : pipe / fork errors (parent)
 111  *               1 : connection error (child)
 112  */
 113 gint session_connect(Session *session, const gchar *server, gushort port)
 114 {
 115         session->server = g_strdup(server);
 116         session->port = port;
 117
 118         session->conn_id = sock_connect_async(server, port, session_connect_cb,
 119                                               session);
 120         if (session->conn_id < 0) {
 121                 g_warning("can't connect to server.");
 122                 session_close(session);
 123                 return -1;
 124         }
 125
 126         return 0;
 127 }
 128
 129 static gint session_connect_cb(SockInfo *sock, gpointer data)
 130 {
 131         Session *session = SESSION(data);
 132
 133         session->conn_id = 0;
 134
 135         if (!sock) {
 136                 g_warning("can't connect to server.");
 137                 session->state = SESSION_ERROR;
 138                 return -1;
 139         }
 140
 141         session->sock = sock;
 142
 143 #if USE_OPENSSL
 144         if (session->ssl_type == SSL_TUNNEL) {
 145                 sock_set_nonblocking_mode(sock, FALSE);
 146                 if (!ssl_init_socket(sock)) {
 147                         g_warning("can't initialize SSL.");
 148                         session->state = SESSION_ERROR;
 149                         return -1;
 150                 }
 151         }
 152 #endif
 153
 154         sock_set_nonblocking_mode(sock, session->nonblocking);
 155
 156         debug_print("session (%p): connected\n", session);
 157
 158         session->state = SESSION_RECV;
 159         session->io_tag = sock_add_watch(session->sock, G_IO_IN,
 160                                          session_read_msg_cb,
 161                                          session);
 162
 163         return 0;
 164 }
 165
 166 /*!
 167  *\brief        child and parent: send DISCONNECT message to other process
 168  *
 169  *\param        session Contains session information
 170  *
 171  *\return        0 : success
 172  */
 173 gint session_disconnect(Session *session)
 174 {
 175         session_close(session);
 176         return 0;
 177 }
 178
 179 /*!
 180  *\brief        parent ?
 181  *
 182  *\param        session Contains session information
 183  */
 184 void session_destroy(Session *session)
 185 {
 186         g_return_if_fail(session != NULL);
 187         g_return_if_fail(session->destroy != NULL);
 188
 189         session_close(session);
 190         session->destroy(session);
 191         g_free(session->server);
 192         g_string_free(session->read_msg_buf, TRUE);
 193         g_byte_array_free(session->read_data_buf, TRUE);
 194         g_free(session->read_data_terminator);
 195         g_free(session->write_buf);
 196
 197         debug_print("session (%p): destroyed\n", session);
 198
 199         g_free(session);
 200 }
 201
 202 gboolean session_is_connected(Session *session)
 203 {
 204         return (session->state == SESSION_READY ||
 205                 session->state == SESSION_SEND ||
 206                 session->state == SESSION_RECV);
 207 }
 208
 209 void session_set_access_time(Session *session)
 210 {
 211         session->last_access_time = time(NULL);
 212 }
 213
 214 void session_set_timeout(Session *session, guint interval)
 215 {
 216         if (session->timeout_tag > 0)
 217                 g_source_remove(session->timeout_tag);
 218
 219         session->timeout_interval = interval;
 220         if (interval > 0)
 221                 session->timeout_tag =
 222                         g_timeout_add(interval, session_timeout_cb, session);
 223         else
 224                 session->timeout_tag = 0;
 225 }
 226
 227 static gboolean session_timeout_cb(gpointer data)
 228 {
 229         Session *session = SESSION(data);
 230
 231         g_warning("session timeout.\n");
 232
 233         if (session->io_tag > 0) {
 234                 g_source_remove(session->io_tag);
 235                 session->io_tag = 0;
 236         }
 237
 238         session->timeout_tag = 0;
 239         session->state = SESSION_TIMEOUT;
 240
 241         return FALSE;
 242 }
 243
 244 void session_set_recv_message_notify(Session *session,
 245                                      RecvMsgNotify notify_func, gpointer data)
 246 {
 247         session->recv_msg_notify = notify_func;
 248         session->recv_msg_notify_data = data;
 249 }
 250
 251 void session_set_recv_data_progressive_notify
 252                                         (Session *session,
 253                                          RecvDataProgressiveNotify notify_func,
 254                                          gpointer data)
 255 {
 256         session->recv_data_progressive_notify = notify_func,
 257         session->recv_data_progressive_notify_data = data;
 258 }
 259
 260 void session_set_recv_data_notify(Session *session, RecvDataNotify notify_func,
 261                                   gpointer data)
 262 {
 263         session->recv_data_notify = notify_func;
 264         session->recv_data_notify_data = data;
 265 }
 266
 267 void session_set_send_data_progressive_notify
 268                                         (Session *session,
 269                                          SendDataProgressiveNotify notify_func,
 270                                          gpointer data)
 271 {
 272         session->send_data_progressive_notify = notify_func;
 273         session->send_data_progressive_notify_data = data;
 274 }
 275
 276 void session_set_send_data_notify(Session *session, SendDataNotify notify_func,
 277                                   gpointer data)
 278 {
 279         session->send_data_notify = notify_func;
 280         session->send_data_notify_data = data;
 281 }
 282
 283 /*!
 284  *\brief        child and parent cleanup (child closes first)
 285  *
 286  *\param        session Contains session information
 287  *
 288  *\return        0 : success
 289  */
 290 static gint session_close(Session *session)
 291 {
 292         g_return_val_if_fail(session != NULL, -1);
 293
 294         if (session->conn_id > 0) {
 295                 sock_connect_async_cancel(session->conn_id);
 296                 session->conn_id = 0;
 297                 debug_print("session (%p): connection cancelled\n", session);
 298         }
 299
 300         session_set_timeout(session, 0);
 301
 302         if (session->io_tag > 0) {
 303                 g_source_remove(session->io_tag);
 304                 session->io_tag = 0;
 305         }
 306
 307         if (session->sock) {
 308                 sock_close(session->sock);
 309                 session->sock = NULL;
 310                 session->state = SESSION_DISCONNECTED;
 311                 debug_print("session (%p): closed\n", session);
 312         }
 313
 314         return 0;
 315 }
 316
 317 #if USE_OPENSSL
 318 gint session_start_tls(Session *session)
 319 {
 320         gboolean nb_mode;
 321
 322         nb_mode = sock_is_nonblocking_mode(session->sock);
 323
 324         if (nb_mode)
 325                 sock_set_nonblocking_mode(session->sock, FALSE);
 326
 327         if (!ssl_init_socket_with_method(session->sock, SSL_METHOD_TLSv1)) {
 328                 g_warning("can't start TLS session.\n");
 329                 if (nb_mode)
 330                         sock_set_nonblocking_mode(session->sock, TRUE);
 331                 return -1;
 332         }
 333
 334         if (nb_mode)
 335                 sock_set_nonblocking_mode(session->sock, session->nonblocking);
 336
 337         return 0;
 338 }
 339 #endif
 340
 341 gint session_send_msg(Session *session, SessionMsgType type, const gchar *msg)
 342 {
 343         gboolean ret;
 344
 345         g_return_val_if_fail(session->write_buf == NULL, -1);
 346         g_return_val_if_fail(msg != NULL, -1);
 347         g_return_val_if_fail(msg[0] != '\0', -1);
 348
 349         session->state = SESSION_SEND;
 350         session->write_buf = g_strconcat(msg, "\r\n", NULL);
 351         session->write_buf_p = session->write_buf;
 352         session->write_buf_len = strlen(msg) + 2;
 353
 354         ret = session_write_msg_cb(session->sock, G_IO_OUT, session);
 355
 356         if (ret == TRUE)
 357                 session->io_tag = sock_add_watch(session->sock, G_IO_OUT,
 358                                                  session_write_msg_cb, session);
 359         else if (session->state == SESSION_ERROR)
 360                 return -1;
 361
 362         return 0;
 363 }
 364
 365 gint session_recv_msg(Session *session)
 366 {
 367         g_return_val_if_fail(session->read_msg_buf->len == 0, -1);
 368
 369         session->state = SESSION_RECV;
 370
 371         if (session->read_buf_len > 0)
 372                 g_idle_add(session_recv_msg_idle_cb, session);
 373         else
 374                 session->io_tag = sock_add_watch(session->sock, G_IO_IN,
 375                                                  session_read_msg_cb, session);
 376
 377         return 0;
 378 }
 379
 380 static gboolean session_recv_msg_idle_cb(gpointer data)
 381 {
 382         Session *session = SESSION(data);
 383         gboolean ret;
 384
 385         ret = session_read_msg_cb(session->sock, G_IO_IN, session);
 386
 387         if (ret == TRUE)
 388                 session->io_tag = sock_add_watch(session->sock, G_IO_IN,
 389                                                  session_read_msg_cb, session);
 390
 391         return FALSE;
 392 }
 393
 394 /*!
 395  *\brief        parent (child?): send data to other process
 396  *
 397  *\param        session Contains session information
 398  *              data Data to send
 399  *              size Bytes to send
 400  *
 401  *\return        0 : success
 402  *              -1 : error
 403  */
 404 gint session_send_data(Session *session, const guchar *data, guint size)
 405 {
 406         gboolean ret;
 407
 408         g_return_val_if_fail(session->write_buf == NULL, -1);
 409         g_return_val_if_fail(data != NULL, -1);
 410         g_return_val_if_fail(size != 0, -1);
 411
 412         session->state = SESSION_SEND;
 413
 414         session->write_buf = g_malloc(size);
 415         session->write_buf_p = session->write_buf;
 416         memcpy(session->write_buf, data, size);
 417         session->write_buf_len = size;
 418         gettimeofday(&session->tv_prev, NULL);
 419
 420         ret = session_write_data_cb(session->sock, G_IO_OUT, session);
 421
 422         if (ret == TRUE)
 423                 session->io_tag = sock_add_watch(session->sock, G_IO_OUT,
 424                                                  session_write_data_cb,
 425                                                  session);
 426         else if (session->state == SESSION_ERROR)
 427                 return -1;
 428
 429         return 0;
 430 }
 431
 432 gint session_recv_data(Session *session, guint size, const gchar *terminator)
 433 {
 434         g_return_val_if_fail(session->read_data_buf->len == 0, -1);
 435
 436         session->state = SESSION_RECV;
 437
 438         g_free(session->read_data_terminator);
 439         session->read_data_terminator = g_strdup(terminator);
 440         gettimeofday(&session->tv_prev, NULL);
 441
 442         if (session->read_buf_len > 0)
 443                 g_idle_add(session_recv_data_idle_cb, session);
 444         else
 445                 session->io_tag = sock_add_watch(session->sock, G_IO_IN,
 446                                                  session_read_data_cb, session);
 447
 448         return 0;
 449 }
 450
 451 static gboolean session_recv_data_idle_cb(gpointer data)
 452 {
 453         Session *session = SESSION(data);
 454         gboolean ret;
 455
 456         ret = session_read_data_cb(session->sock, G_IO_IN, session);
 457
 458         if (ret == TRUE)
 459                 session->io_tag = sock_add_watch(session->sock, G_IO_IN,
 460                                                  session_read_data_cb, session);
 461
 462         return FALSE;
 463 }
 464
 465 static gboolean session_read_msg_cb(SockInfo *source, GIOCondition condition,
 466                                     gpointer data)
 467 {
 468         Session *session = SESSION(data);
 469         gchar buf[SESSION_BUFFSIZE];
 470         gint line_len;
 471         gchar *newline;
 472         gchar *msg;
 473         gint ret;
 474
 475         g_return_val_if_fail(condition == G_IO_IN, FALSE);
 476
 477         session_set_timeout(session, session->timeout_interval);
 478
 479         if (session->read_buf_len == 0) {
 480                 gint read_len;
 481
 482                 read_len = sock_read(session->sock, session->read_buf,
 483                                      SESSION_BUFFSIZE - 1);
 484
 485                 if (read_len == -1 && session->state == SESSION_DISCONNECTED) {
 486                         g_warning ("sock_read: session disconnected\n");
 487                         if (session->io_tag > 0) {
 488                                 g_source_remove(session->io_tag);
 489                                 session->io_tag = 0;
 490                         }
 491                         return FALSE;
 492                 }
 493
 494                 if (read_len == 0) {
 495                         g_warning("sock_read: received EOF\n");
 496                         session->state = SESSION_EOF;
 497                         return FALSE;
 498                 }
 499
 500                 if (read_len < 0) {
 501                         switch (errno) {
 502                         case EAGAIN:
 503                                 return TRUE;
 504                         default:
 505                                 g_warning("sock_read: %s\n", g_strerror(errno));
 506                                 session->state = SESSION_ERROR;
 507                                 return FALSE;
 508                         }
 509                 }
 510
 511                 session->read_buf_len = read_len;
 512         }
 513
 514         if ((newline = memchr(session->read_buf_p, '\n', session->read_buf_len))
 515                 != NULL)
 516                 line_len = newline - session->read_buf_p + 1;
 517         else
 518                 line_len = session->read_buf_len;
 519
 520         if (line_len == 0)
 521                 return TRUE;
 522
 523         memcpy(buf, session->read_buf_p, line_len);
 524         buf[line_len] = '\0';
 525
 526         g_string_append(session->read_msg_buf, buf);
 527
 528         session->read_buf_len -= line_len;
 529         if (session->read_buf_len == 0)
 530                 session->read_buf_p = session->read_buf;
 531         else
 532                 session->read_buf_p += line_len;
 533
 534         /* incomplete read */
 535         if (buf[line_len - 1] != '\n')
 536                 return TRUE;
 537
 538         /* complete */
 539         if (session->io_tag > 0) {
 540                 g_source_remove(session->io_tag);
 541                 session->io_tag = 0;
 542         }
 543
 544         /* callback */
 545         msg = g_strdup(session->read_msg_buf->str);
 546         strretchomp(msg);
 547         g_string_truncate(session->read_msg_buf, 0);
 548
 549         ret = session->recv_msg(session, msg);
 550         session->recv_msg_notify(session, msg, session->recv_msg_notify_data);
 551
 552         g_free(msg);
 553
 554         if (ret < 0)
 555                 session->state = SESSION_ERROR;
 556
 557         return FALSE;
 558 }
 559
 560 static gboolean session_read_data_cb(SockInfo *source, GIOCondition condition,
 561                                      gpointer data)
 562 {
 563         Session *session = SESSION(data);
 564         GByteArray *data_buf;
 565         gint terminator_len;
 566         gboolean complete = FALSE;
 567         guint data_len;
 568         gint ret;
 569
 570         g_return_val_if_fail(condition == G_IO_IN, FALSE);
 571
 572         session_set_timeout(session, session->timeout_interval);
 573
 574         if (session->read_buf_len == 0) {
 575                 gint read_len;
 576
 577                 read_len = sock_read(session->sock, session->read_buf,
 578                                      SESSION_BUFFSIZE);
 579
 580                 if (read_len == 0) {
 581                         g_warning("sock_read: received EOF\n");
 582                         session->state = SESSION_EOF;
 583                         return FALSE;
 584                 }
 585
 586                 if (read_len < 0) {
 587                         switch (errno) {
 588                         case EAGAIN:
 589                                 return TRUE;
 590                         default:
 591                                 g_warning("sock_read: %s\n", g_strerror(errno));
 592                                 session->state = SESSION_ERROR;
 593                                 return FALSE;
 594                         }
 595                 }
 596
 597                 session->read_buf_len = read_len;
 598         }
 599
 600         data_buf = session->read_data_buf;
 601         terminator_len = strlen(session->read_data_terminator);
 602
 603         if (session->read_buf_len == 0)
 604                 return TRUE;
 605
 606         g_byte_array_append(data_buf, session->read_buf_p,
 607                             session->read_buf_len);
 608
 609         session->read_buf_len = 0;
 610         session->read_buf_p = session->read_buf;
 611
 612         /* check if data is terminated */
 613         if (data_buf->len >= terminator_len) {
 614                 if (memcmp(data_buf->data, session->read_data_terminator,
 615                            terminator_len) == 0)
 616                         complete = TRUE;
 617                 else if (data_buf->len >= terminator_len + 2 &&
 618                          memcmp(data_buf->data + data_buf->len -
 619                                 (terminator_len + 2), "\r\n", 2) == 0 &&
 620                          memcmp(data_buf->data + data_buf->len -
 621                                 terminator_len, session->read_data_terminator,
 622                                 terminator_len) == 0)
 623                         complete = TRUE;
 624         }
 625
 626         /* incomplete read */
 627         if (!complete) {
 628                 struct timeval tv_cur;
 629
 630                 gettimeofday(&tv_cur, NULL);
 631                 if (tv_cur.tv_sec - session->tv_prev.tv_sec > 0 ||
 632                     tv_cur.tv_usec - session->tv_prev.tv_usec >
 633                     UI_REFRESH_INTERVAL) {
 634                         session->recv_data_progressive_notify
 635                                 (session, data_buf->len, 0,
 636                                  session->recv_data_progressive_notify_data);
 637                         gettimeofday(&session->tv_prev, NULL);
 638                 }
 639                 return TRUE;
 640         }
 641
 642         /* complete */
 643         if (session->io_tag > 0) {
 644                 g_source_remove(session->io_tag);
 645                 session->io_tag = 0;
 646         }
 647
 648         data_len = data_buf->len - terminator_len;
 649
 650         /* callback */
 651         ret = session->recv_data_finished(session, (gchar *)data_buf->data,
 652                                           data_len);
 653
 654         g_byte_array_set_size(data_buf, 0);
 655
 656         session->recv_data_notify(session, data_len,
 657                                   session->recv_data_notify_data);
 658
 659         if (ret < 0)
 660                 session->state = SESSION_ERROR;
 661
 662         return FALSE;
 663 }
 664
 665 static gint session_write_buf(Session *session)
 666 {
 667         gint write_len;
 668         gint to_write_len;
 669
 670         g_return_val_if_fail(session->write_buf != NULL, -1);
 671         g_return_val_if_fail(session->write_buf_p != NULL, -1);
 672         g_return_val_if_fail(session->write_buf_len > 0, -1);
 673
 674         to_write_len = session->write_buf_len -
 675                 (session->write_buf_p - session->write_buf);
 676         to_write_len = MIN(to_write_len, SESSION_BUFFSIZE);
 677
 678         write_len = sock_write(session->sock, session->write_buf_p,
 679                                to_write_len);
 680
 681         if (write_len < 0) {
 682                 switch (errno) {
 683                 case EAGAIN:
 684                         write_len = 0;
 685                         break;
 686                 default:
 687                         g_warning("sock_write: %s\n", g_strerror(errno));
 688                         session->state = SESSION_ERROR;
 689                         return -1;
 690                 }
 691         }
 692
 693         /* incomplete write */
 694         if (session->write_buf_p - session->write_buf + write_len <
 695             session->write_buf_len) {
 696                 session->write_buf_p += write_len;
 697                 return 1;
 698         }
 699
 700         g_free(session->write_buf);
 701         session->write_buf = NULL;
 702         session->write_buf_p = NULL;
 703         session->write_buf_len = 0;
 704
 705         return 0;
 706 }
 707
 708 static gboolean session_write_msg_cb(SockInfo *source, GIOCondition condition,
 709                                      gpointer data)
 710 {
 711         Session *session = SESSION(data);
 712         gint ret;
 713
 714         g_return_val_if_fail(condition == G_IO_OUT, FALSE);
 715         g_return_val_if_fail(session->write_buf != NULL, FALSE);
 716         g_return_val_if_fail(session->write_buf_p != NULL, FALSE);
 717         g_return_val_if_fail(session->write_buf_len > 0, FALSE);
 718
 719         ret = session_write_buf(session);
 720
 721         if (ret < 0) {
 722                 session->state = SESSION_ERROR;
 723                 return FALSE;
 724         } else if (ret > 0)
 725                 return TRUE;
 726
 727         if (session->io_tag > 0) {
 728                 g_source_remove(session->io_tag);
 729                 session->io_tag = 0;
 730         }
 731
 732         session_recv_msg(session);
 733
 734         return FALSE;
 735 }
 736
 737 static gboolean session_write_data_cb(SockInfo *source,
 738                                       GIOCondition condition, gpointer data)
 739 {
 740         Session *session = SESSION(data);
 741         guint write_buf_len;
 742         gint ret;
 743
 744         g_return_val_if_fail(condition == G_IO_OUT, FALSE);
 745         g_return_val_if_fail(session->write_buf != NULL, FALSE);
 746         g_return_val_if_fail(session->write_buf_p != NULL, FALSE);
 747         g_return_val_if_fail(session->write_buf_len > 0, FALSE);
 748
 749         write_buf_len = session->write_buf_len;
 750
 751         ret = session_write_buf(session);
 752
 753         if (ret < 0) {
 754                 session->state = SESSION_ERROR;
 755                 return FALSE;
 756         } else if (ret > 0) {
 757                 struct timeval tv_cur;
 758
 759                 gettimeofday(&tv_cur, NULL);
 760                 if (tv_cur.tv_sec - session->tv_prev.tv_sec > 0 ||
 761                     tv_cur.tv_usec - session->tv_prev.tv_usec >
 762                     UI_REFRESH_INTERVAL) {
 763                         session_set_timeout(session, session->timeout_interval);
 764                         session->send_data_progressive_notify
 765                                 (session,
 766                                  session->write_buf_p - session->write_buf,
 767                                  write_buf_len,
 768                                  session->send_data_progressive_notify_data);
 769                         gettimeofday(&session->tv_prev, NULL);
 770                 }
 771                 return TRUE;
 772         }
 773
 774         if (session->io_tag > 0) {
 775                 g_source_remove(session->io_tag);
 776                 session->io_tag = 0;
 777         }
 778
 779         /* callback */
 780         ret = session->send_data_finished(session, write_buf_len);
 781         session->send_data_notify(session, write_buf_len,
 782                                   session->send_data_notify_data);
 783
 784         return FALSE;
 785 }