4e5f6e63c02eadaa1ae649a676ac4bfd251362c6
[claws.git] / src / send_message.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 #include <gtk/gtk.h>
30 #include <stdio.h>
31 #include <string.h>
32 #include <signal.h>
33 #include <sys/types.h>
34 #ifndef G_OS_WIN32
35 #include <sys/wait.h>
36 #endif
37
38 #include "send_message.h"
39 #include "session.h"
40 #include "ssl.h"
41 #include "smtp.h"
42 #include "prefs_common.h"
43 #include "prefs_account.h"
44 #include "procheader.h"
45 #include "account.h"
46 #include "progressdialog.h"
47 #include "statusbar.h"
48 #include "inputdialog.h"
49 #include "alertpanel.h"
50 #include "manage_window.h"
51 #include "logwindow.h"
52 #include "socket.h"
53 #include "utils.h"
54 #include "gtkutils.h"
55 #include "inc.h"
56 #include "log.h"
57
58 typedef struct _SendProgressDialog      SendProgressDialog;
59
60 struct _SendProgressDialog
61 {
62         ProgressDialog *dialog;
63         Session *session;
64         gboolean cancelled;
65 };
66
67 static SendProgressDialog *send_dialog = NULL;
68
69 static gint send_recv_message           (Session                *session,
70                                          const gchar            *msg,
71                                          gpointer                data);
72 static gint send_send_data_progressive  (Session                *session,
73                                          guint                   cur_len,
74                                          guint                   total_len,
75                                          gpointer                data);
76 static gint send_send_data_finished     (Session                *session,
77                                          guint                   len,
78                                          gpointer                data);
79
80 static SendProgressDialog *send_progress_dialog_create(void);
81 static void send_progress_dialog_destroy(SendProgressDialog *dialog);
82
83 static void send_showlog_button_cb      (GtkWidget      *widget,
84                                          gpointer        data);
85 static void send_cancel_button_cb       (GtkWidget      *widget,
86                                          gpointer        data);
87
88 static void send_put_error              (Session        *session);
89
90
91 void send_cancel(void)
92 {
93         if (send_dialog)
94                 send_cancel_button_cb(NULL, send_dialog);
95 }
96
97 gboolean send_is_active(void)
98 {
99         return (send_dialog != NULL);
100 }
101
102 gint send_message(const gchar *file, PrefsAccount *ac_prefs, GSList *to_list)
103 {
104         FILE *fp;
105         gint val;
106
107         cm_return_val_if_fail(file != NULL, -1);
108         cm_return_val_if_fail(ac_prefs != NULL, -1);
109         cm_return_val_if_fail(to_list != NULL, -1);
110
111         if ((fp = g_fopen(file, "rb")) == NULL) {
112                 FILE_OP_ERROR(file, "fopen");
113                 return -1;
114         }
115
116         inc_lock();
117         if (ac_prefs->use_mail_command && ac_prefs->mail_command &&
118             (*ac_prefs->mail_command)) {
119                 val = send_message_local(ac_prefs->mail_command, fp);
120                 fclose(fp);
121                 inc_unlock();
122                 return val;
123         } else {
124                 val = send_message_smtp(ac_prefs, to_list, fp);
125                 
126                 fclose(fp);
127                 inc_unlock();
128                 return val;
129         }
130 }
131
132 enum
133 {
134         Q_SENDER     = 0,
135         Q_SMTPSERVER = 1,
136         Q_RECIPIENTS = 2,
137         Q_ACCOUNT_ID = 3
138 };
139
140 gint send_message_local(const gchar *command, FILE *fp)
141 {
142         gchar **argv;
143         GPid pid;
144         gint child_stdin;
145         gchar buf[BUFFSIZE];
146         gboolean err = FALSE;
147         gint status;
148
149         cm_return_val_if_fail(command != NULL, -1);
150         cm_return_val_if_fail(fp != NULL, -1);
151
152         log_message(LOG_PROTOCOL, _("Sending message using command: %s\n"), command);
153
154         argv = strsplit_with_quote(command, " ", 0);
155
156         if (g_spawn_async_with_pipes(NULL, argv, NULL,
157 #ifdef G_OS_WIN32
158                                      0,
159 #else
160                                      G_SPAWN_DO_NOT_REAP_CHILD,
161 #endif
162                                      NULL, NULL,
163                                      &pid, &child_stdin, NULL, NULL,
164                                      NULL) == FALSE) {
165                 g_snprintf(buf, sizeof(buf),
166                            _("Couldn't execute command: %s"), command);
167                 log_warning(LOG_PROTOCOL, "%s\n", buf);
168                 alertpanel_error("%s", buf);
169                 g_strfreev(argv);
170                 return -1;
171         }
172         g_strfreev(argv);
173
174         while (fgets(buf, sizeof(buf), fp) != NULL) {
175                 strretchomp(buf);
176                 if (buf[0] == '.' && buf[1] == '\0') {
177                         if (fd_write_all(child_stdin, ".", 1) < 0) {
178                                 err = TRUE;
179                                 break;
180                         }
181                 }
182                 if (fd_write_all(child_stdin, buf, strlen(buf)) < 0 ||
183                     fd_write_all(child_stdin, "\n", 1) < 0) {
184                         err = TRUE;
185                         break;
186                 }
187         }
188
189         fd_close(child_stdin);
190
191 #ifndef G_OS_WIN32
192         waitpid(pid, &status, 0);
193         if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
194                 err = TRUE;
195 #endif
196
197         g_spawn_close_pid(pid);
198
199         if (err) {
200                 g_snprintf(buf, sizeof(buf),
201                            _("Error occurred while executing command: %s"),
202                            command);
203                 log_warning(LOG_PROTOCOL, "%s\n", buf);
204                 alertpanel_error("%s", buf);
205                 return -1;
206         }
207
208         return 0;
209 }
210
211 gint send_message_smtp_full(PrefsAccount *ac_prefs, GSList *to_list, FILE *fp, gboolean keep_session)
212 {
213         Session *session;
214         SMTPSession *smtp_session;
215         gushort port = 0;
216         gchar buf[BUFFSIZE];
217         gint ret = 0;
218         gboolean was_inited = FALSE;
219         MsgInfo *tmp_msginfo = NULL;
220         MsgFlags flags = {0, 0};
221         long fp_pos = 0;
222         gchar spec_from[BUFFSIZE];
223
224         cm_return_val_if_fail(ac_prefs != NULL, -1);
225         cm_return_val_if_fail(ac_prefs->address != NULL, -1);
226         cm_return_val_if_fail(ac_prefs->smtp_server != NULL, -1);
227         cm_return_val_if_fail(to_list != NULL, -1);
228         cm_return_val_if_fail(fp != NULL, -1);
229
230         /* get the From address used, not necessarily the ac_prefs',
231          * because it's editable. */
232
233         fp_pos = ftell(fp);
234         tmp_msginfo = procheader_parse_stream(fp, flags, FALSE, FALSE);
235         fseek(fp, fp_pos, SEEK_SET);
236         
237         if (tmp_msginfo && tmp_msginfo->from) {
238                 strncpy2(spec_from, tmp_msginfo->from, BUFFSIZE-1);
239                 extract_address(spec_from);
240         } else {
241                 strncpy2(spec_from, ac_prefs->address, BUFFSIZE-1);
242         }
243         if (tmp_msginfo) {
244                 procmsg_msginfo_free(tmp_msginfo);
245         }
246
247         if (!ac_prefs->session) {
248                 /* we can't reuse a previously initialised session */
249                 session = smtp_session_new(ac_prefs);
250                 smtp_session = SMTP_SESSION(session);
251
252                 if (ac_prefs->set_domain && ac_prefs->domain && strlen(ac_prefs->domain)) {
253                         smtp_session->hostname = g_strdup(ac_prefs->domain);
254                 } else {
255                         smtp_session->hostname = NULL;
256                 }
257
258 #ifdef USE_GNUTLS
259                 port = ac_prefs->set_smtpport ? ac_prefs->smtpport :
260                         ac_prefs->ssl_smtp == SSL_TUNNEL ? SSMTP_PORT : SMTP_PORT;
261                 session->ssl_type = ac_prefs->ssl_smtp;
262                 if (ac_prefs->ssl_smtp != SSL_NONE)
263                         session->nonblocking = ac_prefs->use_nonblocking_ssl;
264                 if (ac_prefs->set_gnutls_priority && ac_prefs->gnutls_priority &&
265                     strlen(ac_prefs->gnutls_priority))
266                         session->gnutls_priority = g_strdup(ac_prefs->gnutls_priority);
267 #else
268                 if (ac_prefs->ssl_smtp != SSL_NONE) {
269                         if (alertpanel_full(_("Insecure connection"),
270                                 _("This connection is configured to be secured "
271                                   "using SSL, but SSL is not available in this "
272                                   "build of Claws Mail. \n\n"
273                                   "Do you want to continue connecting to this "
274                                   "server? The communication would not be "
275                                   "secure."),
276                                   GTK_STOCK_CANCEL, _("Con_tinue connecting"),
277                                   NULL, FALSE, NULL, ALERT_WARNING,
278                                   G_ALERTDEFAULT) != G_ALERTALTERNATE) {
279                                 session_destroy(session);
280                                 return -1;
281                         }
282                 }
283                 port = ac_prefs->set_smtpport ? ac_prefs->smtpport : SMTP_PORT;
284 #endif
285
286                 if (ac_prefs->use_smtp_auth) {
287                         smtp_session->forced_auth_type = ac_prefs->smtp_auth_type;
288                         if (ac_prefs->smtp_userid && strlen(ac_prefs->smtp_userid)) {
289                                 smtp_session->user = g_strdup(ac_prefs->smtp_userid);
290                                 if (ac_prefs->smtp_passwd)
291                                         smtp_session->pass =
292                                                 g_strdup(ac_prefs->smtp_passwd);
293                                 else {
294                                         smtp_session->pass =
295                                                 input_dialog_query_password_keep
296                                                         (ac_prefs->smtp_server,
297                                                          smtp_session->user,
298                                                          &(ac_prefs->session_smtp_passwd));
299                                         if (!smtp_session->pass) {
300                                                 session_destroy(session);
301                                                 return -1;
302                                         }
303                                 }
304                         } else {
305                                 smtp_session->user = g_strdup(ac_prefs->userid);
306                                 if (ac_prefs->passwd)
307                                         smtp_session->pass = g_strdup(ac_prefs->passwd);
308                                 else {
309                                         smtp_session->pass =
310                                                 input_dialog_query_password_keep
311                                                         (ac_prefs->smtp_server,
312                                                          smtp_session->user,
313                                                          &(ac_prefs->session_smtp_passwd));
314                                         if (!smtp_session->pass) {
315                                                 session_destroy(session);
316                                                 return -1;
317                                         }
318                                 }
319                         }
320                 } else {
321                         smtp_session->user = NULL;
322                         smtp_session->pass = NULL;
323                 }
324
325                 send_dialog = send_progress_dialog_create();
326                 send_dialog->session = session;
327                 smtp_session->dialog = send_dialog;
328
329                 progress_dialog_list_set(send_dialog->dialog, 0, NULL, 
330                                          ac_prefs->smtp_server, 
331                                          _("Connecting"));
332
333                 if (ac_prefs->pop_before_smtp
334                     && (ac_prefs->protocol == A_APOP || ac_prefs->protocol == A_POP3)
335                     && (time(NULL) - ac_prefs->last_pop_login_time) > (60 * ac_prefs->pop_before_smtp_timeout)) {
336                         g_snprintf(buf, sizeof(buf), _("Doing POP before SMTP..."));
337                         log_message(LOG_PROTOCOL, "%s\n", buf);
338                         progress_dialog_set_label(send_dialog->dialog, buf);
339                         progress_dialog_list_set_status(send_dialog->dialog, 0, _("POP before SMTP"));
340                         GTK_EVENTS_FLUSH();
341                         inc_pop_before_smtp(ac_prefs);
342                 }
343
344                 g_snprintf(buf, sizeof(buf), _("Account '%s': Connecting to SMTP server: %s:%d..."),
345                                 ac_prefs->account_name, ac_prefs->smtp_server, port);
346                 progress_dialog_set_label(send_dialog->dialog, buf);
347                 log_message(LOG_PROTOCOL, "%s\n", buf);
348
349                 session_set_recv_message_notify(session, send_recv_message, send_dialog);
350                 session_set_send_data_progressive_notify
351                         (session, send_send_data_progressive, send_dialog);
352                 session_set_send_data_notify(session, send_send_data_finished, send_dialog);
353
354         } else {
355                 /* everything is ready to start at MAIL FROM:, just
356                  * reinit useful variables. 
357                  */
358                 session = SESSION(ac_prefs->session);
359                 ac_prefs->session = NULL;
360                 smtp_session = SMTP_SESSION(session);
361                 smtp_session->state = SMTP_HELO;
362                 send_dialog = (SendProgressDialog *)smtp_session->dialog;
363                 was_inited = TRUE;
364         }
365
366         /* This has to be initialised for every mail sent */
367         smtp_session->from = g_strdup(spec_from);
368         smtp_session->to_list = to_list;
369         smtp_session->cur_to = to_list;
370         smtp_session->send_data = (guchar *)get_outgoing_rfc2822_str(fp);
371         smtp_session->send_data_len = strlen((gchar *)smtp_session->send_data);
372
373         session_set_timeout(session,
374                             prefs_common.io_timeout_secs * 1000);
375         /* connect if necessary */
376         if (!was_inited && session_connect(session, ac_prefs->smtp_server, port) < 0) {
377                 session_destroy(session);
378                 send_progress_dialog_destroy(send_dialog);
379                 ac_prefs->session = NULL;
380                 return -1;
381         }
382
383         debug_print("send_message_smtp(): begin event loop\n");
384
385         if (was_inited) {
386                 /* as the server is quiet, start sending ourselves */
387                 smtp_from(smtp_session);
388         }
389
390         while (session_is_running(session) && send_dialog->cancelled == FALSE
391                 && SMTP_SESSION(session)->state != SMTP_MAIL_SENT_OK)
392                 gtk_main_iteration();
393
394         if (SMTP_SESSION(session)->error_val == SM_AUTHFAIL) {
395                 if (ac_prefs->session_smtp_passwd) {
396                         g_free(ac_prefs->session_smtp_passwd);
397                         ac_prefs->session_smtp_passwd = NULL;
398                 }
399                 ret = -1;
400         } else if (SMTP_SESSION(session)->state == SMTP_MAIL_SENT_OK) {
401                 log_message(LOG_PROTOCOL, "%s\n", _("Mail sent successfully."));
402                 ret = 0;
403         } else if (session->state == SESSION_EOF &&
404                    SMTP_SESSION(session)->state == SMTP_QUIT) {
405                 /* consider EOF right after QUIT successful */
406                 log_warning(LOG_PROTOCOL, "%s\n", _("Connection closed by the remote host."));
407                 ret = 0;
408         } else if (session->state == SESSION_ERROR ||
409                    session->state == SESSION_EOF ||
410                    session->state == SESSION_TIMEOUT ||
411                    SMTP_SESSION(session)->state == SMTP_ERROR ||
412                    SMTP_SESSION(session)->error_val != SM_OK)
413                 ret = -1;
414         else if (send_dialog->cancelled == TRUE)
415                 ret = -1;
416
417         if (ret == -1) {
418                 manage_window_focus_in(send_dialog->dialog->window, NULL, NULL);
419                 send_put_error(session);
420                 manage_window_focus_out(send_dialog->dialog->window, NULL, NULL);
421         }
422
423         /* if we should close the connection, let's do it.
424          * Close it in case of error, too, as it helps reinitializing things
425          * easier.
426          */
427         if (!keep_session || ret != 0) {
428                 if (session_is_connected(session))
429                         smtp_quit(smtp_session);
430                 while (session_is_connected(session) && !send_dialog->cancelled)
431                         gtk_main_iteration();
432                 session_destroy(session);
433                 ac_prefs->session = NULL;
434                 send_progress_dialog_destroy(send_dialog);
435         } else {
436                 g_free(smtp_session->from);
437                 g_free(smtp_session->send_data);
438                 g_free(smtp_session->error_msg);
439         }
440         if (keep_session && ret == 0 && ac_prefs->session == NULL)
441                 ac_prefs->session = SMTP_SESSION(session);
442
443
444         statuswindow_pop_all();
445         statusbar_verbosity_set(FALSE);
446         return ret;
447 }
448
449 gint send_message_smtp(PrefsAccount *ac_prefs, GSList *to_list, FILE *fp)
450 {
451         return send_message_smtp_full(ac_prefs, to_list, fp, FALSE);
452 }
453
454 static gint send_recv_message(Session *session, const gchar *msg, gpointer data)
455 {
456         gchar buf[BUFFSIZE];
457         SMTPSession *smtp_session = SMTP_SESSION(session);
458         SendProgressDialog *dialog = (SendProgressDialog *)data;
459         gchar *state_str = NULL;
460
461         cm_return_val_if_fail(dialog != NULL, -1);
462
463         switch (smtp_session->state) {
464         case SMTP_READY:
465         case SMTP_CONNECTED:
466                 return 0;
467         case SMTP_HELO:
468                 g_snprintf(buf, sizeof(buf), _("Sending HELO..."));
469                 state_str = _("Authenticating");
470                 statuswindow_print_all(_("Sending message..."));
471                 break;
472         case SMTP_EHLO:
473                 g_snprintf(buf, sizeof(buf), _("Sending EHLO..."));
474                 state_str = _("Authenticating");
475                 statuswindow_print_all(_("Sending message..."));
476                 break;
477         case SMTP_AUTH:
478                 g_snprintf(buf, sizeof(buf), _("Authenticating..."));
479                 state_str = _("Authenticating");
480                 break;
481         case SMTP_FROM:
482                 g_snprintf(buf, sizeof(buf), _("Sending MAIL FROM..."));
483                 state_str = _("Sending");
484                 break;
485         case SMTP_RCPT:
486                 g_snprintf(buf, sizeof(buf), _("Sending RCPT TO..."));
487                 state_str = _("Sending");
488                 break;
489         case SMTP_DATA:
490         case SMTP_EOM:
491                 g_snprintf(buf, sizeof(buf), _("Sending DATA..."));
492                 state_str = _("Sending");
493                 break;
494         case SMTP_QUIT:
495                 g_snprintf(buf, sizeof(buf), _("Quitting..."));
496                 state_str = _("Quitting");
497                 break;
498         case SMTP_ERROR:
499                 g_warning("send: error: %s\n", msg);
500                 return 0;
501         default:
502                 return 0;
503         }
504
505         progress_dialog_set_label(dialog->dialog, buf);
506         progress_dialog_list_set_status(dialog->dialog, 0, state_str);
507
508         return 0;
509 }
510
511 static gint send_send_data_progressive(Session *session, guint cur_len,
512                                        guint total_len, gpointer data)
513 {
514         gchar buf[BUFFSIZE];
515         SendProgressDialog *dialog = (SendProgressDialog *)data;
516         MainWindow *mainwin = mainwindow_get_mainwindow();
517         
518         cm_return_val_if_fail(dialog != NULL, -1);
519
520         if (SMTP_SESSION(session)->state != SMTP_SEND_DATA &&
521             SMTP_SESSION(session)->state != SMTP_EOM)
522                 return 0;
523
524         g_snprintf(buf, sizeof(buf), _("Sending message (%d / %d bytes)"),
525                    cur_len, total_len);
526         progress_dialog_set_label(dialog->dialog, buf);
527         progress_dialog_set_fraction
528                 (dialog->dialog, (total_len == 0) ? 0 : (gfloat)cur_len / (gfloat)total_len);
529
530         if (mainwin) {
531                 if (!gtk_widget_get_visible(mainwin->progressbar))      
532                         gtk_widget_show(mainwin->progressbar);
533                 gtk_progress_bar_set_fraction
534                         (GTK_PROGRESS_BAR(mainwin->progressbar),
535                          (total_len == 0) ? 0 : (gfloat)cur_len / (gfloat)total_len);
536         }
537
538         return 0;
539 }
540
541 static gint send_send_data_finished(Session *session, guint len, gpointer data)
542 {
543         SendProgressDialog *dialog = (SendProgressDialog *)data;
544         MainWindow *mainwin = mainwindow_get_mainwindow();
545
546         cm_return_val_if_fail(dialog != NULL, -1);
547
548         send_send_data_progressive(session, len, len, dialog);
549         if (mainwin) {
550                 gtk_widget_hide(mainwin->progressbar);
551                 gtk_progress_bar_set_fraction
552                         (GTK_PROGRESS_BAR(mainwin->progressbar),(gfloat)0);
553         }
554
555         return 0;
556 }
557
558 static void send_progress_dialog_size_allocate_cb(GtkWidget *widget,
559                                          GtkAllocation *allocation)
560 {
561         cm_return_if_fail(allocation != NULL);
562
563         prefs_common.sendwin_width = allocation->width;
564         prefs_common.sendwin_height = allocation->height;
565 }
566
567 static SendProgressDialog *send_progress_dialog_create(void)
568 {
569         SendProgressDialog *dialog;
570         ProgressDialog *progress;
571         static GdkGeometry geometry;
572
573         dialog = g_new0(SendProgressDialog, 1);
574
575         progress = progress_dialog_create();
576         gtk_window_set_title(GTK_WINDOW(progress->window),
577                              _("Sending message"));
578         g_signal_connect(G_OBJECT(progress->showlog_btn), "clicked",
579                          G_CALLBACK(send_showlog_button_cb), dialog);
580         g_signal_connect(G_OBJECT(progress->cancel_btn), "clicked",
581                          G_CALLBACK(send_cancel_button_cb), dialog);
582         g_signal_connect(G_OBJECT(progress->window), "delete_event",
583                          G_CALLBACK(gtk_true), NULL);
584         gtk_window_set_modal(GTK_WINDOW(progress->window), TRUE);
585         g_signal_connect(G_OBJECT(progress->window), "size_allocate",
586                          G_CALLBACK(send_progress_dialog_size_allocate_cb), NULL);
587         manage_window_set_transient(GTK_WINDOW(progress->window));
588
589         progress_dialog_get_fraction(progress);
590
591         if (!geometry.min_height) {
592                 geometry.min_width = 460;
593                 geometry.min_height = 250;
594         }
595
596         gtk_window_set_geometry_hints(GTK_WINDOW(progress->window), NULL, &geometry,
597                                       GDK_HINT_MIN_SIZE);
598         gtk_widget_set_size_request(progress->window, prefs_common.sendwin_width,
599                                     prefs_common.sendwin_height);
600
601         if (!prefs_common.send_dialog_invisible) {
602                 gtk_widget_show_now(progress->window);
603         }
604         
605         dialog->dialog = progress;
606
607         return dialog;
608 }
609
610 static void send_progress_dialog_destroy(SendProgressDialog *dialog)
611 {
612         cm_return_if_fail(dialog != NULL);
613         if (!prefs_common.send_dialog_invisible) {
614                 progress_dialog_destroy(dialog->dialog);
615         }
616         g_free(dialog);
617         send_dialog = NULL;
618 }
619
620 static void send_showlog_button_cb(GtkWidget *widget, gpointer data)
621 {
622         MainWindow *mainwin = mainwindow_get_mainwindow();
623
624         log_window_show(mainwin->logwin);
625 }
626
627 static void send_cancel_button_cb(GtkWidget *widget, gpointer data)
628 {
629         SendProgressDialog *dialog = (SendProgressDialog *)data;
630         statusbar_progress_all(0,0,0);
631
632         dialog->cancelled = TRUE;
633 }
634
635 static void send_put_error(Session *session)
636 {
637         gchar *msg;
638         gchar *log_msg = NULL;
639         gchar *err_msg = NULL;
640
641         msg = SMTP_SESSION(session)->error_msg;
642
643         switch (SMTP_SESSION(session)->error_val) {
644         case SM_ERROR:
645         case SM_UNRECOVERABLE:
646                 log_msg = _("Error occurred while sending the message.");
647                 if (msg)
648                         err_msg = g_strdup_printf
649                                 (_("Error occurred while sending the message:\n%s"),
650                                  msg);
651                 else
652                         err_msg = g_strdup(log_msg);
653                 break;
654         case SM_AUTHFAIL:
655                 log_msg = _("Authentication failed.");
656                 if (msg)
657                         err_msg = g_strdup_printf
658                                 (_("Authentication failed:\n%s"), msg);
659                 else
660                         err_msg = g_strdup(log_msg);
661                 break;
662         default:
663                 switch (session->state) {
664                 case SESSION_ERROR:
665                         log_msg =
666                                 _("Error occurred while sending the message.");
667                         err_msg = g_strdup(log_msg);
668                         break;
669                 case SESSION_EOF:
670                         log_msg = _("Connection closed by the remote host.");
671                         err_msg = g_strdup(log_msg);
672                         break;
673                 case SESSION_TIMEOUT:
674                         log_msg = _("Session timed out. You may be able to "
675                                     "recover by increasing the timeout value in "
676                                     "Preferences/Other/Miscellaneous.");
677                         err_msg = g_strdup(log_msg);
678                         break;
679                 default:
680                         break;
681                 }
682                 break;
683         }
684
685         if (err_msg) {
686                 log_error(LOG_PROTOCOL, "%s\n", err_msg);
687                 g_free(err_msg);
688         } else {
689                 if (log_msg)
690                         log_warning(LOG_PROTOCOL, "%s\n", log_msg);
691         }
692 }
693