src/common/session.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2012 Hiroyuki Yamamoto and the Claws Mail team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  */
  19
  20 #ifdef HAVE_CONFIG_H
  21 #  include "config.h"
  22 #include "claws-features.h"
  23 #endif
  24
  25 #include "defs.h"
  26
  27 #include <glib.h>
  28 #include <glib/gi18n.h>
  29
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <string.h>
  33 #include <unistd.h>
  34 #include <time.h>
  35 #include <errno.h>
  36
  37 #include "session.h"
  38 #include "utils.h"
  39 #include "log.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, const void *prefs_account, gboolean is_smtp)
  65 {
  66         session->type = SESSION_UNKNOWN;
  67         session->sock = NULL;
  68         session->server = NULL;
  69         session->port = 0;
  70 #ifdef USE_GNUTLS
  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         g_get_current_time(&session->tv_prev);
  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->write_data = NULL;
  94         session->write_data_p = NULL;
  95         session->write_data_len = 0;
  96
  97         session->timeout_tag = 0;
  98         session->timeout_interval = 0;
  99
 100         session->data = NULL;
 101         session->account = prefs_account;
 102         session->is_smtp = is_smtp;
 103
 104         session->ping_tag = -1;
 105 }
 106
 107 /*!
 108  *\brief        Set up parent and child process
 109  *              Childloop: Read commands from parent,
 110  *              send to server, get answer, pass to parent
 111  *
 112  *\param        session Contains session information
 113  *              server to connect to
 114  *              port to connect to
 115  *
 116  *\return        0 : success
 117  *              -1 : pipe / fork errors (parent)
 118  *               1 : connection error (child)
 119  */
 120 gint session_connect(Session *session, const gchar *server, gushort port)
 121 {
 122 #ifdef G_OS_UNIX
 123         session->server = g_strdup(server);
 124         session->port = port;
 125
 126         session->conn_id = sock_connect_async(server, port, session_connect_cb,
 127                                               session);
 128         if (session->conn_id < 0) {
 129                 g_warning("can't connect to server.");
 130                 session_close(session);
 131                 if (session->connect_finished)
 132                         session->connect_finished(session, FALSE);
 133                 return -1;
 134         }
 135
 136         return 0;
 137 #else
 138         SockInfo *sock;
 139
 140         session->server = g_strdup(server);
 141         session->port = port;
 142
 143         sock = sock_connect(server, port);
 144         if (sock == NULL) {
 145                 g_warning("can't connect to server.");
 146                 session_close(session);
 147                 if (session->connect_finished)
 148                         session->connect_finished(session, FALSE);
 149                 return -1;
 150         }
 151         sock->is_smtp = session->is_smtp;
 152
 153         return session_connect_cb(sock, session);
 154 #endif
 155 }
 156
 157 static gint session_connect_cb(SockInfo *sock, gpointer data)
 158 {
 159         Session *session = SESSION(data);
 160
 161         session->conn_id = 0;
 162
 163         if (!sock) {
 164                 g_warning("can't connect to server.");
 165                 session->state = SESSION_ERROR;
 166                 if (session->connect_finished)
 167                         session->connect_finished(session, FALSE);
 168                 return -1;
 169         }
 170
 171         session->sock = sock;
 172         sock->account = session->account;
 173         sock->is_smtp = session->is_smtp;
 174         sock->ssl_cert_auto_accept = session->ssl_cert_auto_accept;
 175
 176 #ifdef USE_GNUTLS
 177         sock->gnutls_priority = session->gnutls_priority;
 178
 179         if (session->ssl_type == SSL_TUNNEL) {
 180                 sock_set_nonblocking_mode(sock, FALSE);
 181                 if (!ssl_init_socket(sock)) {
 182                         g_warning("can't initialize SSL/TLS.");
 183                         log_error(LOG_PROTOCOL, _("SSL/TLS handshake failed\n"));
 184                         session->state = SESSION_ERROR;
 185                         if (session->connect_finished)
 186                                 session->connect_finished(session, FALSE);
 187                         return -1;
 188                 }
 189         }
 190 #endif
 191
 192         /* we could have gotten a timeout while waiting for user input in
 193          * an SSL certificate dialog */
 194         if (session->state == SESSION_TIMEOUT) {
 195                 if (session->connect_finished)
 196                         session->connect_finished(session, FALSE);
 197                 return -1;
 198         }
 199
 200         sock_set_nonblocking_mode(sock, session->nonblocking);
 201
 202         debug_print("session (%p): connected\n", session);
 203
 204         session->state = SESSION_RECV;
 205         session->io_tag = sock_add_watch(session->sock, G_IO_IN,
 206                                          session_read_msg_cb,
 207                                          session);
 208
 209         if (session->connect_finished)
 210                 session->connect_finished(session, TRUE);
 211         return 0;
 212 }
 213
 214 /*!
 215  *\brief        child and parent: send DISCONNECT message to other process
 216  *
 217  *\param        session Contains session information
 218  *
 219  *\return        0 : success
 220  */
 221 gint session_disconnect(Session *session)
 222 {
 223         session_close(session);
 224         return 0;
 225 }
 226
 227 /*!
 228  *\brief        parent ?
 229  *
 230  *\param        session Contains session information
 231  */
 232 void session_destroy(Session *session)
 233 {
 234         cm_return_if_fail(session != NULL);
 235         cm_return_if_fail(session->destroy != NULL);
 236
 237         session_register_ping(session, NULL);
 238
 239         session_close(session);
 240         session->destroy(session);
 241         g_free(session->server);
 242         g_string_free(session->read_msg_buf, TRUE);
 243         g_byte_array_free(session->read_data_buf, TRUE);
 244         g_free(session->read_data_terminator);
 245         g_free(session->write_buf);
 246 #ifdef USE_GNUTLS
 247         g_free(session->gnutls_priority);
 248 #endif
 249
 250         debug_print("session (%p): destroyed\n", session);
 251
 252         g_free(session);
 253 }
 254
 255 gboolean session_is_running(Session *session)
 256 {
 257         return (session->state == SESSION_READY ||
 258                 session->state == SESSION_SEND ||
 259                 session->state == SESSION_RECV);
 260 }
 261
 262 gboolean session_is_connected(Session *session)
 263 {
 264         return (session->state == SESSION_SEND ||
 265                 session->state == SESSION_RECV);
 266 }
 267
 268 void session_set_access_time(Session *session)
 269 {
 270         session->last_access_time = time(NULL);
 271 }
 272
 273 void session_set_timeout(Session *session, guint interval)
 274 {
 275         if (session->timeout_tag > 0)
 276                 g_source_remove(session->timeout_tag);
 277
 278         session->timeout_interval = interval;
 279         if (interval > 0) {
 280                 if (interval % 1000 == 0)
 281                         session->timeout_tag =
 282                                 g_timeout_add_seconds(interval/1000, session_timeout_cb, session);
 283                 else
 284                         session->timeout_tag =
 285                                 g_timeout_add(interval, session_timeout_cb, session);
 286         } else
 287                 session->timeout_tag = 0;
 288 }
 289
 290 static gboolean session_timeout_cb(gpointer data)
 291 {
 292         Session *session = SESSION(data);
 293
 294         g_warning("session timeout.");
 295
 296         if (session->io_tag > 0) {
 297                 g_source_remove(session->io_tag);
 298                 session->io_tag = 0;
 299         }
 300
 301         session->timeout_tag = 0;
 302         session->state = SESSION_TIMEOUT;
 303
 304         return FALSE;
 305 }
 306
 307 void session_set_recv_message_notify(Session *session,
 308                                      RecvMsgNotify notify_func, gpointer data)
 309 {
 310         session->recv_msg_notify = notify_func;
 311         session->recv_msg_notify_data = data;
 312 }
 313
 314 void session_set_recv_data_progressive_notify
 315                                         (Session *session,
 316                                          RecvDataProgressiveNotify notify_func,
 317                                          gpointer data)
 318 {
 319         session->recv_data_progressive_notify = notify_func,
 320         session->recv_data_progressive_notify_data = data;
 321 }
 322
 323 void session_set_recv_data_notify(Session *session, RecvDataNotify notify_func,
 324                                   gpointer data)
 325 {
 326         session->recv_data_notify = notify_func;
 327         session->recv_data_notify_data = data;
 328 }
 329
 330 void session_set_send_data_progressive_notify
 331                                         (Session *session,
 332                                          SendDataProgressiveNotify notify_func,
 333                                          gpointer data)
 334 {
 335         session->send_data_progressive_notify = notify_func;
 336         session->send_data_progressive_notify_data = data;
 337 }
 338
 339 void session_set_send_data_notify(Session *session, SendDataNotify notify_func,
 340                                   gpointer data)
 341 {
 342         session->send_data_notify = notify_func;
 343         session->send_data_notify_data = data;
 344 }
 345
 346 /*!
 347  *\brief        child and parent cleanup (child closes first)
 348  *
 349  *\param        session Contains session information
 350  *
 351  *\return        0 : success
 352  */
 353 static gint session_close(Session *session)
 354 {
 355         cm_return_val_if_fail(session != NULL, -1);
 356
 357 #ifdef G_OS_UNIX
 358         if (session->conn_id > 0) {
 359                 sock_connect_async_cancel(session->conn_id);
 360                 session->conn_id = 0;
 361                 debug_print("session (%p): connection cancelled\n", session);
 362         }
 363 #endif
 364
 365         session_set_timeout(session, 0);
 366
 367         if (session->io_tag > 0) {
 368                 g_source_remove(session->io_tag);
 369                 session->io_tag = 0;
 370         }
 371
 372         if (session->sock) {
 373                 sock_close(session->sock);
 374                 session->sock = NULL;
 375                 session->state = SESSION_DISCONNECTED;
 376                 debug_print("session (%p): closed\n", session);
 377         }
 378
 379         return 0;
 380 }
 381
 382 #ifdef USE_GNUTLS
 383 gint session_start_tls(Session *session)
 384 {
 385         gboolean nb_mode;
 386
 387         nb_mode = sock_is_nonblocking_mode(session->sock);
 388
 389         session->sock->ssl_cert_auto_accept = session->ssl_cert_auto_accept;
 390         session->sock->gnutls_priority = session->gnutls_priority;
 391
 392         if (nb_mode)
 393                 sock_set_nonblocking_mode(session->sock, FALSE);
 394
 395         if (!ssl_init_socket(session->sock)) {
 396                 g_warning("couldn't start STARTTLS session.");
 397                 if (nb_mode)
 398                         sock_set_nonblocking_mode(session->sock, session->nonblocking);
 399                 return -1;
 400         }
 401
 402         if (nb_mode)
 403                 sock_set_nonblocking_mode(session->sock, session->nonblocking);
 404
 405         return 0;
 406 }
 407 #endif
 408
 409 gint session_send_msg(Session *session, const gchar *msg)
 410 {
 411         gboolean ret;
 412
 413         cm_return_val_if_fail(session->write_buf == NULL, -1);
 414         cm_return_val_if_fail(msg != NULL, -1);
 415
 416         session->state = SESSION_SEND;
 417         session->write_buf = g_strconcat((strlen(msg) > 0 ? msg : ""), "\r\n", NULL);
 418         session->write_buf_p = session->write_buf;
 419         session->write_buf_len = strlen(msg) + 2;
 420
 421         ret = session_write_msg_cb(session->sock, G_IO_OUT, session);
 422
 423         if (ret == TRUE)
 424                 session->io_tag = sock_add_watch(session->sock, G_IO_OUT,
 425                                                  session_write_msg_cb, session);
 426         else if (session->state == SESSION_ERROR)
 427                 return -1;
 428
 429         return 0;
 430 }
 431
 432 gint session_recv_msg(Session *session)
 433 {
 434         cm_return_val_if_fail(session->read_msg_buf->len == 0, -1);
 435
 436         session->state = SESSION_RECV;
 437
 438         if (session->read_buf_len > 0)
 439                 g_idle_add(session_recv_msg_idle_cb, session);
 440         else
 441                 session->io_tag = sock_add_watch(session->sock, G_IO_IN,
 442                                                  session_read_msg_cb, session);
 443
 444         return 0;
 445 }
 446
 447 static gboolean session_recv_msg_idle_cb(gpointer data)
 448 {
 449         Session *session = SESSION(data);
 450         gboolean ret;
 451
 452         ret = session_read_msg_cb(session->sock, G_IO_IN, session);
 453
 454         if (ret == TRUE)
 455                 session->io_tag = sock_add_watch(session->sock, G_IO_IN,
 456                                                  session_read_msg_cb, session);
 457
 458         return FALSE;
 459 }
 460
 461 /*!
 462  *\brief        parent (child?): send data to other process
 463  *
 464  *\param        session Contains session information
 465  *              data Data to send
 466  *              size Bytes to send
 467  *
 468  *\return        0 : success
 469  *              -1 : error
 470  */
 471 gint session_send_data(Session *session, const guchar *data, guint size)
 472 {
 473         gboolean ret;
 474
 475         cm_return_val_if_fail(session->write_data == NULL, -1);
 476         cm_return_val_if_fail(data != NULL, -1);
 477         cm_return_val_if_fail(size != 0, -1);
 478
 479         session->state = SESSION_SEND;
 480
 481         session->write_data = data;
 482         session->write_data_p = session->write_data;
 483         session->write_data_len = size;
 484         g_get_current_time(&session->tv_prev);
 485
 486         ret = session_write_data_cb(session->sock, G_IO_OUT, session);
 487
 488         if (ret == TRUE)
 489                 session->io_tag = sock_add_watch(session->sock, G_IO_OUT,
 490                                                  session_write_data_cb,
 491                                                  session);
 492         else if (session->state == SESSION_ERROR)
 493                 return -1;
 494
 495         return 0;
 496 }
 497
 498 gint session_recv_data(Session *session, guint size, const gchar *terminator)
 499 {
 500         cm_return_val_if_fail(session->read_data_buf->len == 0, -1);
 501
 502         session->state = SESSION_RECV;
 503
 504         g_free(session->read_data_terminator);
 505         session->read_data_terminator = g_strdup(terminator);
 506         g_get_current_time(&session->tv_prev);
 507
 508         if (session->read_buf_len > 0)
 509                 g_idle_add(session_recv_data_idle_cb, session);
 510         else
 511                 session->io_tag = sock_add_watch(session->sock, G_IO_IN,
 512                                                  session_read_data_cb, session);
 513
 514         return 0;
 515 }
 516
 517 static gboolean session_recv_data_idle_cb(gpointer data)
 518 {
 519         Session *session = SESSION(data);
 520         gboolean ret;
 521
 522         ret = session_read_data_cb(session->sock, G_IO_IN, session);
 523
 524         if (ret == TRUE)
 525                 session->io_tag = sock_add_watch(session->sock, G_IO_IN,
 526                                                  session_read_data_cb, session);
 527
 528         return FALSE;
 529 }
 530
 531 static gboolean session_read_msg_cb(SockInfo *source, GIOCondition condition,
 532                                     gpointer data)
 533 {
 534         Session *session = SESSION(data);
 535         gchar buf[SESSION_BUFFSIZE];
 536         gint line_len;
 537         gchar *newline;
 538         gchar *msg;
 539         gint ret;
 540
 541         cm_return_val_if_fail(condition == G_IO_IN, FALSE);
 542
 543         session_set_timeout(session, session->timeout_interval);
 544
 545         if (session->read_buf_len == 0) {
 546                 gint read_len = -1;
 547
 548                 if (session->sock)
 549                         read_len = sock_read(session->sock, session->read_buf,
 550                                      SESSION_BUFFSIZE - 1);
 551
 552                 if (read_len == -1 && session->state == SESSION_DISCONNECTED) {
 553                         g_warning ("sock_read: session disconnected");
 554                         if (session->io_tag > 0) {
 555                                 g_source_remove(session->io_tag);
 556                                 session->io_tag = 0;
 557                         }
 558                         return FALSE;
 559                 }
 560
 561                 if (read_len == 0) {
 562                         g_warning("sock_read: received EOF");
 563                         session->state = SESSION_EOF;
 564                         return FALSE;
 565                 }
 566
 567                 if (read_len < 0) {
 568                         switch (errno) {
 569                         case EAGAIN:
 570                                 return TRUE;
 571                         default:
 572                                 g_warning("sock_read: %s", g_strerror(errno));
 573                                 session->state = SESSION_ERROR;
 574                                 return FALSE;
 575                         }
 576                 }
 577
 578                 session->read_buf_len = read_len;
 579         }
 580
 581         if ((newline = memchr(session->read_buf_p, '\n', session->read_buf_len))
 582                 != NULL)
 583                 line_len = newline - session->read_buf_p + 1;
 584         else
 585                 line_len = session->read_buf_len;
 586
 587         if (line_len == 0)
 588                 return TRUE;
 589
 590         memcpy(buf, session->read_buf_p, line_len);
 591         buf[line_len] = '\0';
 592
 593         g_string_append(session->read_msg_buf, buf);
 594
 595         session->read_buf_len -= line_len;
 596         if (session->read_buf_len == 0)
 597                 session->read_buf_p = session->read_buf;
 598         else
 599                 session->read_buf_p += line_len;
 600
 601         /* incomplete read */
 602         if (buf[line_len - 1] != '\n')
 603                 return TRUE;
 604
 605         /* complete */
 606         if (session->io_tag > 0) {
 607                 g_source_remove(session->io_tag);
 608                 session->io_tag = 0;
 609         }
 610
 611         /* callback */
 612         msg = g_strdup(session->read_msg_buf->str);
 613         strretchomp(msg);
 614         g_string_truncate(session->read_msg_buf, 0);
 615
 616         ret = session->recv_msg(session, msg);
 617         session->recv_msg_notify(session, msg, session->recv_msg_notify_data);
 618
 619         g_free(msg);
 620
 621         if (ret < 0)
 622                 session->state = SESSION_ERROR;
 623
 624         return FALSE;
 625 }
 626
 627 static gboolean session_read_data_cb(SockInfo *source, GIOCondition condition,
 628                                      gpointer data)
 629 {
 630         Session *session = SESSION(data);
 631         GByteArray *data_buf;
 632         gint terminator_len;
 633         gboolean complete = FALSE;
 634         guint data_len;
 635         gint ret;
 636
 637         cm_return_val_if_fail(condition == G_IO_IN, FALSE);
 638
 639         session_set_timeout(session, session->timeout_interval);
 640
 641         if (session->read_buf_len == 0) {
 642                 gint read_len;
 643
 644                 read_len = sock_read(session->sock, session->read_buf,
 645                                      SESSION_BUFFSIZE);
 646
 647                 if (read_len == 0) {
 648                         g_warning("sock_read: received EOF");
 649                         session->state = SESSION_EOF;
 650                         return FALSE;
 651                 }
 652
 653                 if (read_len < 0) {
 654                         switch (errno) {
 655                         case EAGAIN:
 656                                 return TRUE;
 657                         default:
 658                                 g_warning("sock_read: %s", g_strerror(errno));
 659                                 session->state = SESSION_ERROR;
 660                                 return FALSE;
 661                         }
 662                 }
 663
 664                 session->read_buf_len = read_len;
 665         }
 666
 667         data_buf = session->read_data_buf;
 668         terminator_len = strlen(session->read_data_terminator);
 669
 670         if (session->read_buf_len == 0)
 671                 return TRUE;
 672
 673         g_byte_array_append(data_buf, session->read_buf_p,
 674                             session->read_buf_len);
 675
 676         session->read_buf_len = 0;
 677         session->read_buf_p = session->read_buf;
 678
 679         /* check if data is terminated */
 680         if (data_buf->len >= terminator_len) {
 681                 if (memcmp(data_buf->data, session->read_data_terminator,
 682                            terminator_len) == 0)
 683                         complete = TRUE;
 684                 else if (data_buf->len >= terminator_len + 2 &&
 685                          memcmp(data_buf->data + data_buf->len -
 686                                 (terminator_len + 2), "\r\n", 2) == 0 &&
 687                          memcmp(data_buf->data + data_buf->len -
 688                                 terminator_len, session->read_data_terminator,
 689                                 terminator_len) == 0)
 690                         complete = TRUE;
 691         }
 692
 693         /* incomplete read */
 694         if (!complete) {
 695                 GTimeVal tv_cur;
 696
 697                 g_get_current_time(&tv_cur);
 698                 if (tv_cur.tv_sec - session->tv_prev.tv_sec > 0 ||
 699                     tv_cur.tv_usec - session->tv_prev.tv_usec >
 700                     UI_REFRESH_INTERVAL) {
 701                         session->recv_data_progressive_notify
 702                                 (session, data_buf->len, 0,
 703                                  session->recv_data_progressive_notify_data);
 704                         g_get_current_time(&session->tv_prev);
 705                 }
 706                 return TRUE;
 707         }
 708
 709         /* complete */
 710         if (session->io_tag > 0) {
 711                 g_source_remove(session->io_tag);
 712                 session->io_tag = 0;
 713         }
 714
 715         data_len = data_buf->len - terminator_len;
 716
 717         /* callback */
 718         ret = session->recv_data_finished(session, (gchar *)data_buf->data,
 719                                           data_len);
 720
 721         g_byte_array_set_size(data_buf, 0);
 722
 723         session->recv_data_notify(session, data_len,
 724                                   session->recv_data_notify_data);
 725
 726         if (ret < 0)
 727                 session->state = SESSION_ERROR;
 728
 729         return FALSE;
 730 }
 731
 732 static gint session_write_buf(Session *session)
 733 {
 734         gint write_len;
 735         gint to_write_len;
 736
 737         cm_return_val_if_fail(session->write_buf != NULL, -1);
 738         cm_return_val_if_fail(session->write_buf_p != NULL, -1);
 739         cm_return_val_if_fail(session->write_buf_len > 0, -1);
 740
 741         to_write_len = session->write_buf_len -
 742                 (session->write_buf_p - session->write_buf);
 743         to_write_len = MIN(to_write_len, SESSION_BUFFSIZE);
 744
 745         write_len = sock_write(session->sock, session->write_buf_p,
 746                                to_write_len);
 747
 748         if (write_len < 0) {
 749                 switch (errno) {
 750                 case EAGAIN:
 751                         write_len = 0;
 752                         break;
 753                 default:
 754                         g_warning("sock_write: %s", g_strerror(errno));
 755                         session->state = SESSION_ERROR;
 756                         return -1;
 757                 }
 758         }
 759
 760         /* incomplete write */
 761         if (session->write_buf_p - session->write_buf + write_len <
 762             session->write_buf_len) {
 763                 session->write_buf_p += write_len;
 764                 return 1;
 765         }
 766
 767         g_free(session->write_buf);
 768         session->write_buf = NULL;
 769         session->write_buf_p = NULL;
 770         session->write_buf_len = 0;
 771
 772         return 0;
 773 }
 774
 775 static gint session_write_data(Session *session)
 776 {
 777         gint write_len;
 778         gint to_write_len;
 779
 780         cm_return_val_if_fail(session->write_data != NULL, -1);
 781         cm_return_val_if_fail(session->write_data_p != NULL, -1);
 782         cm_return_val_if_fail(session->write_data_len > 0, -1);
 783
 784         to_write_len = session->write_data_len -
 785                 (session->write_data_p - session->write_data);
 786         to_write_len = MIN(to_write_len, SESSION_BUFFSIZE);
 787
 788         write_len = sock_write(session->sock, session->write_data_p,
 789                                to_write_len);
 790
 791         if (write_len < 0) {
 792                 switch (errno) {
 793                 case EAGAIN:
 794                         write_len = 0;
 795                         break;
 796                 default:
 797                         g_warning("sock_write: %s", g_strerror(errno));
 798                         session->state = SESSION_ERROR;
 799                         return -1;
 800                 }
 801         }
 802
 803         /* incomplete write */
 804         if (session->write_data_p - session->write_data + write_len <
 805             session->write_data_len) {
 806                 session->write_data_p += write_len;
 807                 return 1;
 808         }
 809
 810         session->write_data = NULL;
 811         session->write_data_p = NULL;
 812         session->write_data_len = 0;
 813
 814         return 0;
 815 }
 816
 817 static gboolean session_write_msg_cb(SockInfo *source, GIOCondition condition,
 818                                      gpointer data)
 819 {
 820         Session *session = SESSION(data);
 821         gint ret;
 822
 823         cm_return_val_if_fail(condition == G_IO_OUT, FALSE);
 824         cm_return_val_if_fail(session->write_buf != NULL, FALSE);
 825         cm_return_val_if_fail(session->write_buf_p != NULL, FALSE);
 826         cm_return_val_if_fail(session->write_buf_len > 0, FALSE);
 827
 828         ret = session_write_buf(session);
 829
 830         if (ret < 0) {
 831                 session->state = SESSION_ERROR;
 832                 return FALSE;
 833         } else if (ret > 0)
 834                 return TRUE;
 835
 836         if (session->io_tag > 0) {
 837                 g_source_remove(session->io_tag);
 838                 session->io_tag = 0;
 839         }
 840
 841         session_recv_msg(session);
 842
 843         return FALSE;
 844 }
 845
 846 static gboolean session_write_data_cb(SockInfo *source,
 847                                       GIOCondition condition, gpointer data)
 848 {
 849         Session *session = SESSION(data);
 850         guint write_data_len;
 851         gint ret;
 852
 853         cm_return_val_if_fail(condition == G_IO_OUT, FALSE);
 854         cm_return_val_if_fail(session->write_data != NULL, FALSE);
 855         cm_return_val_if_fail(session->write_data_p != NULL, FALSE);
 856         cm_return_val_if_fail(session->write_data_len > 0, FALSE);
 857
 858         write_data_len = session->write_data_len;
 859
 860         ret = session_write_data(session);
 861
 862         if (ret < 0) {
 863                 session->state = SESSION_ERROR;
 864                 return FALSE;
 865         } else if (ret > 0) {
 866                 GTimeVal tv_cur;
 867
 868                 g_get_current_time(&tv_cur);
 869                 if (tv_cur.tv_sec - session->tv_prev.tv_sec > 0 ||
 870                     tv_cur.tv_usec - session->tv_prev.tv_usec >
 871                     UI_REFRESH_INTERVAL) {
 872                         session_set_timeout(session, session->timeout_interval);
 873                         session->send_data_progressive_notify
 874                                 (session,
 875                                  session->write_data_p - session->write_data,
 876                                  write_data_len,
 877                                  session->send_data_progressive_notify_data);
 878                         g_get_current_time(&session->tv_prev);
 879                 }
 880                 return TRUE;
 881         }
 882
 883         if (session->io_tag > 0) {
 884                 g_source_remove(session->io_tag);
 885                 session->io_tag = 0;
 886         }
 887
 888         /* callback */
 889         ret = session->send_data_finished(session, write_data_len);
 890         session->send_data_notify(session, write_data_len,
 891                                   session->send_data_notify_data);
 892
 893         return FALSE;
 894 }
 895
 896 void session_register_ping(Session *session, gboolean (*ping_cb)(gpointer data))
 897 {
 898         if (!session)
 899                 return;
 900         if (session->ping_tag > -1)
 901                 g_source_remove(session->ping_tag);
 902
 903         session->ping_tag = -1;
 904
 905         if (ping_cb != NULL)
 906                 session->ping_tag = g_timeout_add_seconds(60, ping_cb, session);
 907 }