2 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3 * Copyright (C) 1999-2003 Hiroyuki Yamamoto
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.
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.
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.
31 #include <sys/types.h>
33 #include <sys/signal.h>
40 static gint session_close (Session *session);
42 static gchar *session_recv_msg (Session *session);
44 static guchar *session_read_data (Session *session,
47 static gint session_send_data_to_sock (Session *session,
50 static guchar *session_recv_data_from_sock (Session *session,
53 static guchar *session_recv_data_from_sock_unescape (Session *session,
57 gboolean session_parent_input_cb (GIOChannel *source,
58 GIOCondition condition,
61 gboolean session_child_input (Session *session);
65 *\brief init session members to zero
67 *\param session to be initialized
69 void session_init(Session *session)
74 session->server = NULL;
76 session->state = SESSION_READY;
77 session->last_access_time = time(NULL);
80 session->read_ch = NULL;
81 session->write_ch = NULL;
85 *\brief Set up parent and child process
86 * Childloop: Read commands from parent,
87 * send to server, get answer, pass to parent
89 *\param session Contains session information
90 * server to connect to
94 * -1 : pipe / fork errors (parent)
95 * 1 : connection error (child)
97 gint session_connect(Session *session, const gchar *server, gushort port)
100 gint pipe_fds1[2], pipe_fds2[2];
104 session->server = g_strdup(server);
105 session->port = port;
107 if (pipe(pipe_fds1) < 0) {
111 if (pipe(pipe_fds2) < 0) {
118 if ((pid = fork()) < 0) {
124 session->child_pid = pid;
125 session->read_ch = g_io_channel_unix_new(pipe_fds2[0]);
126 session->write_ch = g_io_channel_unix_new(pipe_fds1[1]);
129 session->read_tag = g_io_add_watch(session->read_ch, G_IO_IN,
130 session_parent_input_cb,
137 session->read_ch = g_io_channel_unix_new(pipe_fds1[0]);
138 session->write_ch = g_io_channel_unix_new(pipe_fds2[1]);
142 debug_print("session: child: connecting to %s:%d ...\n", server, port);
144 if ((sock = sock_connect(server, port)) == NULL) {
145 session_send_msg(session, SESSION_MSG_ERROR,
146 "can't connect to server.");
147 session_close(session);
152 if (session->ssl_type == SSL_TUNNEL && !ssl_init_socket(sock)) {
153 session_send_msg(session, SESSION_MSG_ERROR,
154 "can't initialize SSL.");
155 session_close(session);
160 debug_print("session: child: connected\n");
162 session->sock = sock;
163 session->state = SESSION_RECV;
165 if ((str = sock_getline(sock)) == NULL) {
166 session_send_msg(session, SESSION_MSG_ERROR,
167 "can't get server response.");
168 session_close(session);
172 session_send_msg(session, SESSION_MSG_NORMAL, str);
175 while (session_child_input(session) == TRUE)
178 session_close(session);
180 debug_print("session: child: disconnected\n");
186 *\brief child and parent: send DISCONNECT message to other process
188 *\param session Contains session information
192 gint session_disconnect(Session *session)
194 debug_print("session: %s: session_disconnect()\n",
195 session->child_pid == 0 ? "child" : "parent");
196 session_send_msg(session, SESSION_MSG_CONTROL, "DISCONNECT");
203 *\param session Contains session information
205 void session_destroy(Session *session)
207 g_return_if_fail(session != NULL);
208 g_return_if_fail(session->destroy != NULL);
210 debug_print("session: session_destroy()\n");
211 session_close(session);
212 session->destroy(session);
213 g_free(session->server);
217 void session_set_recv_message_notify(Session *session,
218 RecvMsgNotify notify_func, gpointer data)
220 session->recv_msg_notify = notify_func;
221 session->recv_msg_notify_data = data;
224 void session_set_recv_data_progressive_notify
226 RecvDataProgressiveNotify notify_func,
229 session->recv_data_progressive_notify = notify_func,
230 session->recv_data_progressive_notify_data = data;
233 void session_set_recv_data_notify(Session *session, RecvDataNotify notify_func,
236 session->recv_data_notify = notify_func;
237 session->recv_data_notify_data = data;
240 void session_set_send_data_progressive_notify
242 SendDataProgressiveNotify notify_func,
245 session->send_data_progressive_notify = notify_func;
246 session->send_data_progressive_notify_data = data;
249 void session_set_send_data_notify(Session *session, SendDataNotify notify_func,
252 session->send_data_notify = notify_func;
253 session->send_data_notify_data = data;
257 *\brief child and parent cleanup (child closes first)
259 *\param session Contains session information
263 static gint session_close(Session *session)
265 g_return_val_if_fail(session != NULL, -1);
267 debug_print("session: %s: session_close()\n",
268 session->child_pid == 0 ? "child" : "parent");
270 if (session->read_tag > 0) {
271 g_source_remove(session->read_tag);
272 session->read_tag = 0;
275 if (session->read_ch) {
276 g_io_channel_close(session->read_ch);
277 g_io_channel_unref(session->read_ch);
278 session->read_ch = NULL;
281 if (session->write_ch) {
282 g_io_channel_close(session->write_ch);
283 g_io_channel_unref(session->write_ch);
284 session->write_ch = NULL;
288 sock_close(session->sock);
289 session->sock = NULL;
290 session->state = SESSION_DISCONNECTED;
293 if (session->child_pid) {
294 if (session->state != SESSION_DISCONNECTED)
295 kill(session->child_pid, SIGTERM);
296 waitpid(session->child_pid, NULL, 0);
297 session->child_pid = 0;
304 *\brief child and parent: send control message to other process
306 *\param session Contains session information
307 * type Kind of data (commands or message data)
313 gint session_send_msg(Session *session, SessionMsgType type, const gchar *msg)
322 case SESSION_MSG_NORMAL:
323 prefix = "MESSAGE"; break;
324 case SESSION_MSG_SEND_DATA:
325 prefix = "SENDDATA"; break;
326 case SESSION_MSG_RECV_DATA:
327 prefix = "RECVDATA"; break;
328 case SESSION_MSG_CONTROL:
329 prefix = "CONTROL"; break;
330 case SESSION_MSG_ERROR:
331 prefix = "ERROR"; break;
336 cur = str = g_strdup_printf("%s %s\n", prefix, msg);
340 if (g_io_channel_write(session->write_ch, cur, size,
342 != G_IO_ERROR_NONE || bytes_written == 0) {
343 g_warning("%s: sending message failed.\n",
344 session->child_pid == 0 ? "child" : "parent");
348 size -= bytes_written;
349 cur += bytes_written;
358 *\brief child and parent receive function
360 *\param session Contains session information
362 *\return Message read by current session
364 static gchar *session_recv_msg(Session *session)
372 if (g_io_channel_read(session->read_ch, buf, sizeof(buf) - 1,
374 != G_IO_ERROR_NONE || bytes_read == 0) {
375 g_warning("%s: receiving message failed.\n",
376 session->child_pid == 0 ? "child" : "parent");
383 buf[bytes_read] = '\0';
388 str = g_realloc(str, size);
391 if (str[size - 2] == '\n') {
392 str[size - 2] = '\0';
394 debug_print("session: %s: received message: %s\n",
395 session->child_pid == 0 ?
396 "child" : "parent", str);
406 gint session_start_tls(Session *session)
410 session_send_msg(session, SESSION_MSG_CONTROL, "STARTTLS");
411 ctl_msg = session_recv_msg(session);
412 if (!ctl_msg || strcmp(ctl_msg, "CONTROL STARTTLSOK") != 0) {
423 *\brief parent (child?): send data to other process
425 *\param session Contains session information
432 gint session_send_data(Session *session, const guchar *data, guint size)
435 const guchar *cur = data;
439 session_send_msg(session, SESSION_MSG_SEND_DATA, itos(size));
440 if ((msg = session_recv_msg(session)) == NULL)
445 if ((err = g_io_channel_write(session->write_ch, (guchar *)cur,
446 size, &bytes_written))
447 != G_IO_ERROR_NONE || bytes_written == 0) {
448 g_warning("%s: sending data failed: %d\n",
449 session->child_pid == 0 ? "child" : "parent",
453 size -= bytes_written;
454 cur += bytes_written;
455 debug_print("session: %s: sent %d bytes of data\n",
456 session->child_pid == 0 ? "child" : "parent",
463 gint session_recv_data(Session *session, guint size, gboolean unescape_dot)
468 g_snprintf(buf, sizeof(buf), "%d UNESCAPE", size);
469 session_send_msg(session, SESSION_MSG_RECV_DATA, buf);
471 session_send_msg(session, SESSION_MSG_RECV_DATA, itos(size));
476 *\brief child (parent?): read data from other process
478 *\param session Contains session information
481 *\return data read from session
483 static guchar *session_read_data(Session *session, guint size)
490 cur = data = g_malloc(size);
493 if ((err = g_io_channel_read(session->read_ch, cur, size,
495 != G_IO_ERROR_NONE || bytes_read == 0) {
496 g_warning("%s: reading data failed: %d\n",
497 session->child_pid == 0 ? "child" : "parent",
504 debug_print("session: %s: received %d bytes of data\n",
505 session->child_pid == 0 ? "child" : "parent",
512 #define MAX_CHUNK_SIZE 4096
515 *\brief child: Send session data to server
517 *\param session Contains session information
518 * data Data to send to server
524 static gint session_send_data_to_sock(Session *session, const guchar *data,
527 const guchar *cur = data;
529 gint total_write_len = 0;
533 struct timeval tv_prev, tv_cur;
535 gettimeofday(&tv_prev, NULL);
538 bytes_written = sock_write(session->sock, cur,
539 MIN(left, MAX_CHUNK_SIZE));
540 if (bytes_written <= 0)
542 left -= bytes_written;
543 cur += bytes_written;
544 total_write_len += bytes_written;
548 gettimeofday(&tv_cur, NULL);
549 if (tv_cur.tv_sec - tv_prev.tv_sec > 0 ||
550 tv_cur.tv_usec - tv_prev.tv_usec > UI_REFRESH_INTERVAL) {
551 g_snprintf(buf, sizeof(buf), "DATASENDINPROG %d %d",
552 total_write_len, size);
553 session_send_msg(session, SESSION_MSG_CONTROL, buf);
554 if ((msg = session_recv_msg(session)) == NULL)
557 gettimeofday(&tv_prev, NULL);
565 *\brief child: Read answer/data from server
567 *\param session Contains session information
568 * size Max bytes to receive
570 *\return Server answer
572 static guchar *session_recv_data_from_sock(Session *session, guint size)
577 gint total_read_len = 0;
581 struct timeval tv_prev, tv_cur;
583 gettimeofday(&tv_prev, NULL);
585 cur = data = g_malloc(size);
588 bytes_read = sock_read(session->sock, cur, left);
589 if (bytes_read <= 0) {
593 debug_print("session: child: "
594 "received %d bytes of data from sock\n",
598 total_read_len += bytes_read;
602 gettimeofday(&tv_cur, NULL);
603 if (tv_cur.tv_sec - tv_prev.tv_sec > 0 ||
604 tv_cur.tv_usec - tv_prev.tv_usec > UI_REFRESH_INTERVAL) {
605 g_snprintf(buf, sizeof(buf), "DATARECVINPROG %d %d",
606 total_read_len, size);
607 session_send_msg(session, SESSION_MSG_CONTROL, buf);
608 if ((msg = session_recv_msg(session)) == NULL) {
613 gettimeofday(&tv_prev, NULL);
620 static guchar *session_recv_data_from_sock_unescape(Session *session,
629 struct timeval tv_prev, tv_cur;
631 gettimeofday(&tv_prev, NULL);
633 data = g_string_sized_new(size + 1);
637 bytes_read = sock_gets(session->sock, buf, sizeof(buf));
638 if (bytes_read <= 0) {
639 g_string_free(data, TRUE);
643 if (buf[0] == '.' && buf[1] == '\r' && buf[2] == '\n')
645 if (buf[0] == '.' && buf[1] == '.')
646 g_string_append(data, buf + 1);
648 g_string_append(data, buf);
650 gettimeofday(&tv_cur, NULL);
651 if (tv_cur.tv_sec - tv_prev.tv_sec > 0 ||
652 tv_cur.tv_usec - tv_prev.tv_usec > UI_REFRESH_INTERVAL) {
653 g_snprintf(buf, sizeof(buf), "DATARECVINPROG %d %d",
654 data->len, MAX(data->len, size));
655 session_send_msg(session, SESSION_MSG_CONTROL, buf);
656 if ((msg = session_recv_msg(session)) == NULL) {
657 g_string_free(data, TRUE);
661 gettimeofday(&tv_prev, NULL);
665 ret_data = data->str;
666 *actual_size = data->len;
667 g_string_free(data, FALSE);
673 *\brief Return if message is an internal command or server data
675 *\param str Message to analyze
677 *\return Type of message
679 static SessionMsgType session_get_msg_type(const gchar *str)
681 if (!strncmp(str, "MESSAGE ", 8))
682 return SESSION_MSG_NORMAL;
683 else if (!strncmp(str, "SENDDATA ", 9))
684 return SESSION_MSG_SEND_DATA;
685 else if (!strncmp(str, "RECVDATA ", 9))
686 return SESSION_MSG_RECV_DATA;
687 else if (!strncmp(str, "CONTROL ", 8))
688 return SESSION_MSG_CONTROL;
689 else if (!strncmp(str, "ERROR ", 6))
690 return SESSION_MSG_ERROR;
692 return SESSION_MSG_UNKNOWN;
696 *\brief parent: Received data from child
698 *\param source Channel watching child pipe
699 * condition Unused (IN, HUP, OUT)
700 * data Contains session information
702 *\return FALSE to remove watching channel
704 gboolean session_parent_input_cb(GIOChannel *source, GIOCondition condition,
707 Session *session = SESSION(data);
716 if ((msg = session_recv_msg(session)) == NULL) {
717 session->state = SESSION_ERROR;
721 switch (session_get_msg_type(msg)) {
722 case SESSION_MSG_NORMAL:
723 msg_data = msg + strlen("MESSAGE ");
724 ret = session->recv_msg(session, msg_data);
725 session->recv_msg_notify(session, msg_data,
726 session->recv_msg_notify_data);
728 session_send_msg(session, SESSION_MSG_CONTROL,
731 session->state = SESSION_ERROR;
736 case SESSION_MSG_SEND_DATA:
737 msg_data = msg + strlen("SENDDATA ");
738 size = atoi(msg_data);
739 session_send_msg(session, SESSION_MSG_CONTROL, "ACCEPTDATA");
740 recv_data = session_read_data(session, size);
742 session->state = SESSION_ERROR;
746 ret = session->recv_data_finished(session, recv_data, size);
748 session->recv_data_notify(session, size,
749 session->recv_data_notify_data);
751 session_send_msg(session, SESSION_MSG_CONTROL,
754 session->state = SESSION_ERROR;
759 case SESSION_MSG_RECV_DATA:
761 case SESSION_MSG_CONTROL:
762 msg_data = msg + strlen("CONTROL ");
763 if (!strncmp(msg_data, "DATARECVINPROG ", 15)) {
764 ret = sscanf(msg_data,
765 "DATARECVINPROG %d %d", &len, &total);
767 g_warning("wrong control message: %s\n", msg);
768 session->state = SESSION_ERROR;
772 session_send_msg(session, SESSION_MSG_CONTROL,
774 session->recv_data_progressive_notify
775 (session, len, total,
776 session->recv_data_progressive_notify_data);
777 } else if (!strncmp(msg_data, "DATASENDINPROG ", 15)) {
778 ret = sscanf(msg_data,
779 "DATASENDINPROG %d %d", &len, &total);
781 g_warning("wrong control message: %s\n", msg);
782 session->state = SESSION_ERROR;
786 session_send_msg(session, SESSION_MSG_CONTROL,
788 session->send_data_progressive_notify
789 (session, len, total,
790 session->send_data_progressive_notify_data);
791 } else if (!strncmp(msg_data, "DATASENT ", 9)) {
792 len = atoi(msg_data + 9);
793 ret = session->send_data_finished(session, len);
794 session->send_data_notify
795 (session, len, session->send_data_notify_data);
796 } else if (!strcmp(msg_data, "DISCONNECTED")) {
797 session->state = SESSION_DISCONNECTED;
801 g_warning("wrong control message: %s\n", msg);
802 session->state = SESSION_ERROR;
807 case SESSION_MSG_ERROR:
809 g_warning("error from child: %s\n", msg + strlen("ERROR "));
810 session->state = SESSION_ERROR;
820 *\brief child: Receive control message from parent,
821 * transfer data from/to server
823 *\param session Contains session information
825 *\return TRUE if more data is available
827 gboolean session_child_input(Session *session)
838 if ((msg = session_recv_msg(session)) == NULL) {
839 session_send_msg(session, SESSION_MSG_ERROR,
840 "receiving message failed.");
841 session->state = SESSION_ERROR;
845 switch (session_get_msg_type(msg)) {
846 case SESSION_MSG_NORMAL:
847 msg_data = msg + strlen("MESSAGE ");
848 session->state = SESSION_SEND;
849 sock_puts(session->sock, msg_data);
850 session->state = SESSION_RECV;
851 str = sock_getline(session->sock);
853 session_send_msg(session, SESSION_MSG_ERROR,
854 "receiving message failed.");
855 session->state = SESSION_ERROR;
860 session_send_msg(session, SESSION_MSG_NORMAL, str);
863 case SESSION_MSG_SEND_DATA:
864 msg_data = msg + strlen("SENDDATA ");
865 size = atoi(msg_data);
866 session_send_msg(session, SESSION_MSG_CONTROL, "ACCEPTDATA");
867 send_data = session_read_data(session, size);
869 session_send_msg(session, SESSION_MSG_ERROR,
870 "sending data failed.");
871 session->state = SESSION_ERROR;
875 session->state = SESSION_SEND;
876 if (session_send_data_to_sock(session, send_data, size) < 0) {
877 session_send_msg(session, SESSION_MSG_ERROR,
878 "sending data failed.");
879 session->state = SESSION_ERROR;
885 g_snprintf(buf, sizeof(buf), "DATASENT %d", size);
886 session_send_msg(session, SESSION_MSG_CONTROL, buf);
888 case SESSION_MSG_RECV_DATA:
889 msg_data = msg + strlen("RECVDATA ");
890 size = atoi(msg_data);
891 session->state = SESSION_RECV;
892 if (strstr(msg_data, "UNESCAPE") != NULL) {
893 recv_data = session_recv_data_from_sock_unescape
894 (session, size, &actual_size);
897 recv_data = session_recv_data_from_sock(session, size);
899 session_send_msg(session, SESSION_MSG_ERROR,
900 "receiving data failed.");
901 session->state = SESSION_ERROR;
905 if (session_send_data(session, recv_data, size) < 0) {
906 session->state = SESSION_ERROR;
913 case SESSION_MSG_CONTROL:
914 msg_data = msg + strlen("CONTROL ");
915 if (!strcmp(msg_data, "CONTINUE")) {
916 session->state = SESSION_RECV;
917 str = sock_getline(session->sock);
919 session_send_msg(session, SESSION_MSG_ERROR,
920 "receiving message failed.");
921 session->state = SESSION_ERROR;
926 session_send_msg(session, SESSION_MSG_NORMAL, str);
930 } else if (!strcmp(msg_data, "STARTTLS")) {
931 if (!ssl_init_socket_with_method(session->sock,
933 session_send_msg(session, SESSION_MSG_ERROR,
934 "can't start TLS session.");
935 session->state = SESSION_ERROR;
939 session_send_msg(session, SESSION_MSG_CONTROL,
943 } else if (!strcmp(msg_data, "DISCONNECT")) {
944 sock_close(session->sock);
945 session->sock = NULL;
946 session->state = SESSION_DISCONNECTED;
947 session_send_msg(session, SESSION_MSG_CONTROL,
952 session_send_msg(session, SESSION_MSG_ERROR,
953 "wrong control message.");
954 session->state = SESSION_ERROR;
959 case SESSION_MSG_ERROR:
961 session_send_msg(session, SESSION_MSG_ERROR,
962 "error received from parent.");
963 session->state = SESSION_ERROR;