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