apps/irssi/src/core/servers-reconnect.c

   1 /*
   2  servers-reconnect.c : irssi
   3
   4     Copyright (C) 1999-2000 Timo Sirainen
   5
   6     This program is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     This program is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with this program; if not, write to the Free Software
  18     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19 */
  20
  21 #include "module.h"
  22 #include "commands.h"
  23 #include "network.h"
  24 #include "signals.h"
  25
  26 #include "chat-protocols.h"
  27 #include "servers.h"
  28 #include "servers-setup.h"
  29 #include "servers-reconnect.h"
  30
  31 #include "settings.h"
  32
  33 GSList *reconnects;
  34 static int last_reconnect_tag;
  35 static int reconnect_timeout_tag;
  36 static int reconnect_time;
  37 static int connect_timeout;
  38
  39 void reconnect_save_status(SERVER_CONNECT_REC *conn, SERVER_REC *server)
  40 {
  41         g_free_not_null(conn->tag);
  42         conn->tag = g_strdup(server->tag);
  43
  44         g_free_not_null(conn->away_reason);
  45         conn->away_reason = !server->usermode_away ? NULL :
  46                 g_strdup(server->away_reason);
  47
  48         if (!server->connected) {
  49                 /* default to channels/usermode from connect record
  50                    since server isn't fully connected yet */
  51                 g_free_not_null(conn->channels);
  52                 conn->channels = server->connrec->no_autojoin_channels ? NULL :
  53                         g_strdup(server->connrec->channels);
  54
  55                 g_free_not_null(conn->channels);
  56                 conn->channels = g_strdup(server->connrec->channels);
  57         }
  58
  59         signal_emit("server reconnect save status", 2, conn, server);
  60 }
  61
  62 static void server_reconnect_add(SERVER_CONNECT_REC *conn,
  63                                  time_t next_connect)
  64 {
  65         RECONNECT_REC *rec;
  66
  67         g_return_if_fail(IS_SERVER_CONNECT(conn));
  68
  69         rec = g_new(RECONNECT_REC, 1);
  70         rec->tag = ++last_reconnect_tag;
  71         rec->next_connect = next_connect;
  72
  73         rec->conn = conn;
  74         server_connect_ref(conn);
  75
  76         reconnects = g_slist_append(reconnects, rec);
  77 }
  78
  79 void server_reconnect_destroy(RECONNECT_REC *rec)
  80 {
  81         g_return_if_fail(rec != NULL);
  82
  83         reconnects = g_slist_remove(reconnects, rec);
  84
  85         signal_emit("server reconnect remove", 1, rec);
  86         server_connect_unref(rec->conn);
  87         g_free(rec);
  88
  89         if (reconnects == NULL)
  90             last_reconnect_tag = 0;
  91 }
  92
  93 static int server_reconnect_timeout(void)
  94 {
  95         SERVER_CONNECT_REC *conn;
  96         GSList *list, *tmp, *next;
  97         time_t now;
  98
  99         now = time(NULL);
 100
 101         /* timeout any connections that haven't gotten to connected-stage */
 102         for (tmp = servers; tmp != NULL; tmp = next) {
 103                 SERVER_REC *server = tmp->data;
 104
 105                 next = tmp->next;
 106                 if (!server->connected &&
 107                     server->connect_time + connect_timeout < now &&
 108                     connect_timeout > 0) {
 109                         server->connection_lost = TRUE;
 110                         server_disconnect(server);
 111                 }
 112         }
 113
 114         /* If server_connect() removes the next reconnection in queue,
 115            we're screwed. I don't think this should happen anymore, but just
 116            to be sure we don't crash, do this safely. */
 117         list = g_slist_copy(reconnects);
 118         for (tmp = list; tmp != NULL; tmp = tmp->next) {
 119                 RECONNECT_REC *rec = tmp->data;
 120
 121                 if (g_slist_find(reconnects, rec) == NULL)
 122                         continue;
 123
 124                 if (rec->next_connect <= now) {
 125                         conn = rec->conn;
 126                         server_connect_ref(conn);
 127                         server_reconnect_destroy(rec);
 128                         server_connect(conn);
 129                         server_connect_unref(conn);
 130                 }
 131         }
 132
 133         g_slist_free(list);
 134         return 1;
 135 }
 136
 137 static void sserver_connect(SERVER_SETUP_REC *rec, SERVER_CONNECT_REC *conn)
 138 {
 139         conn->family = rec->family;
 140         conn->address = g_strdup(rec->address);
 141         if (conn->port == 0) conn->port = rec->port;
 142
 143         server_setup_fill_reconn(conn, rec);
 144         server_reconnect_add(conn, rec->last_connect+reconnect_time);
 145         server_connect_unref(conn);
 146 }
 147
 148 static SERVER_CONNECT_REC *
 149 server_connect_copy_skeleton(SERVER_CONNECT_REC *src, int connect_info)
 150 {
 151         SERVER_CONNECT_REC *dest;
 152
 153         dest = NULL;
 154         signal_emit("server connect copy", 2, &dest, src);
 155         g_return_val_if_fail(dest != NULL, NULL);
 156
 157         server_connect_ref(dest);
 158         dest->type = module_get_uniq_id("SERVER CONNECT", 0);
 159         dest->reconnection = src->reconnection;
 160         dest->proxy = g_strdup(src->proxy);
 161         dest->proxy_port = src->proxy_port;
 162         dest->proxy_string = g_strdup(src->proxy_string);
 163         dest->proxy_string_after = g_strdup(src->proxy_string_after);
 164         dest->proxy_password = g_strdup(src->proxy_password);
 165
 166         dest->tag = g_strdup(src->tag);
 167
 168         if (connect_info) {
 169                 dest->family = src->family;
 170                 dest->address = g_strdup(src->address);
 171                 dest->port = src->port;
 172                 dest->password = g_strdup(src->password);
 173         }
 174
 175         dest->chatnet = g_strdup(src->chatnet);
 176         dest->nick = g_strdup(src->nick);
 177         dest->username = g_strdup(src->username);
 178         dest->realname = g_strdup(src->realname);
 179
 180         if (src->own_ip4 != NULL) {
 181                 dest->own_ip4 = g_new(IPADDR, 1);
 182                 memcpy(dest->own_ip4, src->own_ip4, sizeof(IPADDR));
 183         }
 184         if (src->own_ip6 != NULL) {
 185                 dest->own_ip6 = g_new(IPADDR, 1);
 186                 memcpy(dest->own_ip6, src->own_ip6, sizeof(IPADDR));
 187         }
 188
 189         dest->channels = g_strdup(src->channels);
 190         dest->away_reason = g_strdup(src->away_reason);
 191         dest->no_autojoin_channels = src->no_autojoin_channels;
 192
 193         dest->use_ssl = src->use_ssl;
 194
 195         return dest;
 196 }
 197
 198 #define server_should_reconnect(server) \
 199         ((server)->connection_lost && !(server)->no_reconnect && \
 200         ((server)->connrec->chatnet != NULL || \
 201                 (!(server)->banned && !(server)->dns_error)))
 202
 203 #define sserver_connect_ok(rec, net) \
 204         (!(rec)->banned && !(rec)->dns_error && (rec)->chatnet != NULL && \
 205         g_strcasecmp((rec)->chatnet, (net)) == 0)
 206
 207 static void sig_reconnect(SERVER_REC *server)
 208 {
 209         SERVER_CONNECT_REC *conn;
 210         SERVER_SETUP_REC *sserver;
 211         GSList *tmp;
 212         int use_next, through;
 213         time_t now;
 214
 215         g_return_if_fail(IS_SERVER(server));
 216
 217         if (reconnect_time == -1 || !server_should_reconnect(server))
 218                 return;
 219
 220         conn = server_connect_copy_skeleton(server->connrec, FALSE);
 221         g_return_if_fail(conn != NULL);
 222
 223         /* save the server status */
 224         if (server->connected) {
 225                 conn->reconnection = TRUE;
 226
 227                 reconnect_save_status(conn, server);
 228         }
 229
 230         sserver = server_setup_find(server->connrec->address,
 231                                     server->connrec->port,
 232                                     server->connrec->chatnet);
 233
 234         if (sserver != NULL) {
 235                 /* save the last connection time/status */
 236                 sserver->last_connect = server->connect_time == 0 ?
 237                         time(NULL) : server->connect_time;
 238                 sserver->last_failed = !server->connected;
 239                 sserver->banned = server->banned;
 240                 sserver->dns_error = server->dns_error;
 241         }
 242
 243         if (sserver == NULL || conn->chatnet == NULL) {
 244                 /* not in any chatnet, just reconnect back to same server */
 245                 conn->family = server->connrec->family;
 246                 conn->address = g_strdup(server->connrec->address);
 247                 conn->port = server->connrec->port;
 248                 conn->password = g_strdup(server->connrec->password);
 249
 250                 server_reconnect_add(conn, (server->connect_time == 0 ? time(NULL) :
 251                                             server->connect_time) + reconnect_time);
 252                 server_connect_unref(conn);
 253                 return;
 254         }
 255
 256         /* always try to first connect to the first on the list where we
 257            haven't got unsuccessful connection attempts for the past half
 258            an hour. */
 259
 260         now = time(NULL);
 261         for (tmp = setupservers; tmp != NULL; tmp = tmp->next) {
 262                 SERVER_SETUP_REC *rec = tmp->data;
 263
 264                 if (sserver_connect_ok(rec, conn->chatnet) &&
 265                     (!rec->last_connect || !rec->last_failed ||
 266                      rec->last_connect < now-FAILED_RECONNECT_WAIT)) {
 267                         if (rec == sserver)
 268                                 conn->port = server->connrec->port;
 269                         sserver_connect(rec, conn);
 270                         return;
 271                 }
 272         }
 273
 274         /* just try the next server in list */
 275         use_next = through = FALSE;
 276         for (tmp = setupservers; tmp != NULL; ) {
 277                 SERVER_SETUP_REC *rec = tmp->data;
 278
 279                 if (!use_next && server->connrec->port == rec->port &&
 280                     g_strcasecmp(rec->address, server->connrec->address) == 0)
 281                         use_next = TRUE;
 282                 else if (use_next && sserver_connect_ok(rec, conn->chatnet)) {
 283                         if (rec == sserver)
 284                                 conn->port = server->connrec->port;
 285                         sserver_connect(rec, conn);
 286                         break;
 287                 }
 288
 289                 if (tmp->next != NULL) {
 290                         tmp = tmp->next;
 291                         continue;
 292                 }
 293
 294                 if (through) {
 295                         /* shouldn't happen unless there's no servers in
 296                            this chatnet in setup.. */
 297                         server_connect_unref(conn);
 298                         break;
 299                 }
 300
 301                 tmp = setupservers;
 302                 use_next = through = TRUE;
 303         }
 304 }
 305
 306 static void sig_connected(SERVER_REC *server)
 307 {
 308         g_return_if_fail(IS_SERVER(server));
 309         if (!server->connrec->reconnection)
 310                 return;
 311
 312         if (server->connrec->channels != NULL)
 313                 server->channels_join(server, server->connrec->channels, TRUE);
 314 }
 315
 316 /* Remove all servers from reconnect list */
 317 /* SYNTAX: RMRECONNS */
 318 static void cmd_rmreconns(void)
 319 {
 320         while (reconnects != NULL)
 321                 server_reconnect_destroy(reconnects->data);
 322 }
 323
 324 static RECONNECT_REC *reconnect_find_tag(int tag)
 325 {
 326         GSList *tmp;
 327
 328         for (tmp = reconnects; tmp != NULL; tmp = tmp->next) {
 329                 RECONNECT_REC *rec = tmp->data;
 330
 331                 if (rec->tag == tag)
 332                         return rec;
 333         }
 334
 335         return NULL;
 336 }
 337
 338 static void reconnect_all(void)
 339 {
 340         GSList *list;
 341         SERVER_CONNECT_REC *conn;
 342         RECONNECT_REC *rec;
 343
 344         /* first move reconnects to another list so if server_connect()
 345            fails and goes to reconnection list again, we won't get stuck
 346            here forever */
 347         list = NULL;
 348         while (reconnects != NULL) {
 349                 rec = reconnects->data;
 350
 351                 list = g_slist_append(list, rec->conn);
 352                 server_connect_ref(rec->conn);
 353                 server_reconnect_destroy(rec);
 354         }
 355
 356
 357         while (list != NULL) {
 358                 conn = list->data;
 359
 360                 server_connect(conn);
 361                 server_connect_unref(conn);
 362                 list = g_slist_remove(list, conn);
 363         }
 364 }
 365
 366 /* SYNTAX: RECONNECT <tag> [<quit message>] */
 367 static void cmd_reconnect(const char *data, SERVER_REC *server)
 368 {
 369         SERVER_CONNECT_REC *conn;
 370         RECONNECT_REC *rec;
 371         char *tag, *msg;
 372         void *free_arg;
 373         int tagnum;
 374
 375         if (!cmd_get_params(data, &free_arg, 2 | PARAM_FLAG_GETREST, &tag, &msg))
 376                 return;
 377
 378         if (*tag != '\0' && strcmp(tag, "*") != 0)
 379                 server = server_find_tag(tag);
 380
 381         if (server != NULL) {
 382                 /* reconnect connected server */
 383                 conn = server_connect_copy_skeleton(server->connrec, TRUE);
 384
 385                 if (server->connected)
 386                         reconnect_save_status(conn, server);
 387
 388                 msg = g_strconcat("* ", *msg == '\0' ?
 389                                   "Reconnecting" : msg, NULL);
 390                 signal_emit("command disconnect", 2, msg, server);
 391                 g_free(msg);
 392
 393                 conn->reconnection = TRUE;
 394                 server_connect(conn);
 395                 server_connect_unref(conn);
 396                 cmd_params_free(free_arg);
 397                 return;
 398         }
 399
 400         if (g_strcasecmp(tag, "all") == 0) {
 401                 /* reconnect all servers in reconnect queue */
 402                 reconnect_all();
 403                 cmd_params_free(free_arg);
 404                 return;
 405         }
 406
 407         if (*data == '\0') {
 408                 /* reconnect to first server in reconnection list */
 409                 if (reconnects == NULL)
 410                         cmd_return_error(CMDERR_NOT_CONNECTED);
 411                 rec = reconnects->data;
 412         } else {
 413                 if (g_strncasecmp(data, "RECON-", 6) == 0)
 414                         data += 6;
 415
 416                 tagnum = atoi(tag);
 417                 rec = tagnum <= 0 ? NULL : reconnect_find_tag(tagnum);
 418         }
 419
 420         if (rec == NULL) {
 421                 signal_emit("server reconnect not found", 1, data);
 422         } else {
 423                 conn = rec->conn;
 424                 server_connect_ref(conn);
 425                 server_reconnect_destroy(rec);
 426                 server_connect(conn);
 427                 server_connect_unref(conn);
 428         }
 429
 430         cmd_params_free(free_arg);
 431 }
 432
 433 static void cmd_disconnect(const char *data, SERVER_REC *server)
 434 {
 435         RECONNECT_REC *rec;
 436
 437         if (g_strncasecmp(data, "RECON-", 6) != 0)
 438                 return; /* handle only reconnection removing */
 439
 440         rec = reconnect_find_tag(atoi(data+6));
 441
 442         if (rec == NULL)
 443                 signal_emit("server reconnect not found", 1, data);
 444         else
 445                 server_reconnect_destroy(rec);
 446         signal_stop();
 447 }
 448
 449 static void sig_chat_protocol_deinit(CHAT_PROTOCOL_REC *proto)
 450 {
 451         GSList *tmp, *next;
 452
 453         for (tmp = reconnects; tmp != NULL; tmp = next) {
 454                 RECONNECT_REC *rec = tmp->data;
 455
 456                 next = tmp->next;
 457                 if (rec->conn->chat_type == proto->id)
 458                         server_reconnect_destroy(rec);
 459         }
 460 }
 461
 462 static void read_settings(void)
 463 {
 464         reconnect_time = settings_get_int("server_reconnect_time");
 465         connect_timeout = settings_get_int("server_connect_timeout");
 466 }
 467
 468 void servers_reconnect_init(void)
 469 {
 470         settings_add_int("server", "server_reconnect_time", 300);
 471         settings_add_int("server", "server_connect_timeout", 300);
 472
 473         reconnects = NULL;
 474         last_reconnect_tag = 0;
 475
 476         reconnect_timeout_tag = g_timeout_add(1000, (GSourceFunc) server_reconnect_timeout, NULL);
 477         read_settings();
 478
 479         signal_add("server connect failed", (SIGNAL_FUNC) sig_reconnect);
 480         signal_add("server disconnected", (SIGNAL_FUNC) sig_reconnect);
 481         signal_add("event connected", (SIGNAL_FUNC) sig_connected);
 482         signal_add("chat protocol deinit", (SIGNAL_FUNC) sig_chat_protocol_deinit);
 483         signal_add("setup changed", (SIGNAL_FUNC) read_settings);
 484
 485         command_bind("rmreconns", NULL, (SIGNAL_FUNC) cmd_rmreconns);
 486         command_bind("reconnect", NULL, (SIGNAL_FUNC) cmd_reconnect);
 487         command_bind_first("disconnect", NULL, (SIGNAL_FUNC) cmd_disconnect);
 488 }
 489
 490 void servers_reconnect_deinit(void)
 491 {
 492         g_source_remove(reconnect_timeout_tag);
 493
 494         signal_remove("server connect failed", (SIGNAL_FUNC) sig_reconnect);
 495         signal_remove("server disconnected", (SIGNAL_FUNC) sig_reconnect);
 496         signal_remove("event connected", (SIGNAL_FUNC) sig_connected);
 497         signal_remove("chat protocol deinit", (SIGNAL_FUNC) sig_chat_protocol_deinit);
 498         signal_remove("setup changed", (SIGNAL_FUNC) read_settings);
 499
 500         command_unbind("rmreconns", (SIGNAL_FUNC) cmd_rmreconns);
 501         command_unbind("reconnect", (SIGNAL_FUNC) cmd_reconnect);
 502         command_unbind("disconnect", (SIGNAL_FUNC) cmd_disconnect);
 503 }