src/ngircd/irc-oper.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2014 Alexander Barton (alex@barton.de) and Contributors.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  * Please read the file COPYING, README and AUTHORS for more information.
  10  */
  11
  12 #include "portab.h"
  13
  14 /**
  15  * @file
  16  * IRC operator commands
  17  */
  18
  19 #include <assert.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <signal.h>
  24 #include <time.h>
  25
  26 #include "ngircd.h"
  27 #include "conn-func.h"
  28 #include "conf.h"
  29 #include "channel.h"
  30 #include "class.h"
  31 #include "parse.h"
  32 #include "irc.h"
  33 #include "irc-write.h"
  34 #include "lists.h"
  35 #include "log.h"
  36 #include "match.h"
  37 #include "messages.h"
  38 #include "op.h"
  39
  40 /**
  41  * Handle invalid received OPER command.
  42  * Log OPER attempt and send error message to client.
  43  */
  44 static bool
  45 Bad_OperPass(CLIENT *Client, char *errtoken, char *errmsg)
  46 {
  47         Log(LOG_WARNING, "Got invalid OPER from \"%s\": \"%s\" -- %s!",
  48             Client_Mask(Client), errtoken, errmsg);
  49         /* Increase penalty to slow down possible brute force attacks */
  50         IRC_SetPenalty(Client, 10);
  51         return IRC_WriteStrClient(Client, ERR_PASSWDMISMATCH_MSG,
  52                                   Client_ID(Client));
  53 } /* Bad_OperPass */
  54
  55 /**
  56  * Handler for the IRC "OPER" command.
  57  *
  58  * @param Client The client from which this command has been received.
  59  * @param Req Request structure with prefix and all parameters.
  60  * @return CONNECTED or DISCONNECTED.
  61  */
  62 GLOBAL bool
  63 IRC_OPER( CLIENT *Client, REQUEST *Req )
  64 {
  65         struct Conf_Oper *op;
  66         size_t len, i;
  67
  68         assert( Client != NULL );
  69         assert( Req != NULL );
  70
  71         len = array_length(&Conf_Opers, sizeof(*op));
  72         op = array_start(&Conf_Opers);
  73         for (i = 0; i < len && strcmp(op[i].name, Req->argv[0]); i++)
  74                 ;
  75         if (i >= len)
  76                 return Bad_OperPass(Client, Req->argv[0], "not configured");
  77
  78         if (strcmp(op[i].pwd, Req->argv[1]) != 0)
  79                 return Bad_OperPass(Client, op[i].name, "bad password");
  80
  81         if (op[i].mask && (!Match(op[i].mask, Client_Mask(Client))))
  82                 return Bad_OperPass(Client, op[i].mask, "hostmask check failed");
  83
  84         if (!Client_HasMode(Client, 'o')) {
  85                 Client_ModeAdd(Client, 'o');
  86                 if (!IRC_WriteStrClient(Client, "MODE %s :+o",
  87                                         Client_ID(Client)))
  88                         return DISCONNECTED;
  89                 IRC_WriteStrServersPrefix(NULL, Client, "MODE %s :+o",
  90                                           Client_ID(Client));
  91         }
  92
  93         Log(LOG_NOTICE|LOG_snotice,
  94             "Got valid OPER for \"%s\" from \"%s\", user is an IRC operator now.",
  95             Req->argv[0], Client_Mask(Client));
  96
  97         return IRC_WriteStrClient(Client, RPL_YOUREOPER_MSG, Client_ID(Client));
  98 } /* IRC_OPER */
  99
 100 /**
 101  * Handler for the IRC "DIE" command.
 102  *
 103  * @param Client The client from which this command has been received.
 104  * @param Req Request structure with prefix and all parameters.
 105  * @return CONNECTED or DISCONNECTED.
 106  */
 107 GLOBAL bool
 108 IRC_DIE(CLIENT * Client, REQUEST * Req)
 109 {
 110         /* Shut down server */
 111
 112         CONN_ID c;
 113         CLIENT *cl;
 114
 115         assert(Client != NULL);
 116         assert(Req != NULL);
 117
 118         if (!Op_Check(Client, Req))
 119                 return Op_NoPrivileges(Client, Req);
 120
 121         /* Is a message given? */
 122         if (Req->argc > 0) {
 123                 c = Conn_First();
 124                 while (c != NONE) {
 125                         cl = Conn_GetClient(c);
 126                         if (Client_Type(cl) == CLIENT_USER)
 127                                 IRC_WriteStrClient(cl, "NOTICE %s :%s",
 128                                                 Client_ID(cl), Req->argv[0]);
 129                         c = Conn_Next(c);
 130                 }
 131         }
 132
 133         Log(LOG_NOTICE | LOG_snotice, "Got DIE command from \"%s\" ...",
 134             Client_Mask(Client));
 135         NGIRCd_SignalQuit = true;
 136
 137         return CONNECTED;
 138 } /* IRC_DIE */
 139
 140 /**
 141  * Handler for the IRC "REHASH" command.
 142  *
 143  * @param Client The client from which this command has been received.
 144  * @param Req Request structure with prefix and all parameters.
 145  * @return CONNECTED or DISCONNECTED.
 146  */
 147 GLOBAL bool
 148 IRC_REHASH( CLIENT *Client, REQUEST *Req )
 149 {
 150         /* Reload configuration file */
 151
 152         assert( Client != NULL );
 153         assert( Req != NULL );
 154
 155         if (!Op_Check(Client, Req))
 156                 return Op_NoPrivileges(Client, Req);
 157
 158         Log(LOG_NOTICE|LOG_snotice, "Got REHASH command from \"%s\" ...",
 159             Client_Mask(Client));
 160         IRC_WriteStrClient(Client, RPL_REHASHING_MSG, Client_ID(Client));
 161
 162         raise(SIGHUP);
 163
 164         return CONNECTED;
 165 } /* IRC_REHASH */
 166
 167 /**
 168  * Handler for the IRC "RESTART" command.
 169  *
 170  * @param Client The client from which this command has been received.
 171  * @param Req Request structure with prefix and all parameters.
 172  * @return CONNECTED or DISCONNECTED.
 173  */
 174 GLOBAL bool
 175 IRC_RESTART( CLIENT *Client, REQUEST *Req )
 176 {
 177         /* Restart IRC server (fork a new process) */
 178
 179         assert( Client != NULL );
 180         assert( Req != NULL );
 181
 182         if (!Op_Check(Client, Req))
 183                 return Op_NoPrivileges(Client, Req);
 184
 185         Log(LOG_NOTICE|LOG_snotice, "Got RESTART command from \"%s\" ...",
 186             Client_Mask(Client));
 187         NGIRCd_SignalRestart = true;
 188
 189         return CONNECTED;
 190 } /* IRC_RESTART */
 191
 192 /**
 193  * Handler for the IRC "CONNECT" command.
 194  *
 195  * @param Client The client from which this command has been received.
 196  * @param Req Request structure with prefix and all parameters.
 197  * @return CONNECTED or DISCONNECTED.
 198  */
 199 GLOBAL bool
 200 IRC_CONNECT(CLIENT * Client, REQUEST * Req)
 201 {
 202         CLIENT *from, *target;
 203
 204         assert(Client != NULL);
 205         assert(Req != NULL);
 206
 207         /* Bad number of parameters? */
 208         if (Req->argc != 1 && Req->argc != 2 && Req->argc != 3 &&
 209             Req->argc != 5 && Req->argc != 6)
 210                 return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 211                                           Client_ID(Client), Req->command);
 212
 213         /* Invalid port number? */
 214         if ((Req->argc > 1) && atoi(Req->argv[1]) < 1)
 215                 return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 216                                           Client_ID(Client), Req->command);
 217
 218         if (Client_Type(Client) != CLIENT_SERVER
 219             && !Client_HasMode(Client, 'o'))
 220                 return Op_NoPrivileges(Client, Req);
 221
 222         from = Client;
 223         target = Client_ThisServer();
 224
 225         if (Req->argc == 3 || Req->argc == 6) {
 226                 /* This CONNECT has a target parameter */
 227                 if (Client_Type(Client) == CLIENT_SERVER && Req->prefix)
 228                         from = Client_Search(Req->prefix);
 229                 if (! from)
 230                         return IRC_WriteErrClient(Client, ERR_NOSUCHNICK_MSG,
 231                                                   Client_ID(Client), Req->prefix);
 232
 233                 target = (Req->argc == 3) ? Client_Search(Req->argv[2])
 234                                           : Client_Search(Req->argv[5]);
 235                 if (! target || Client_Type(target) != CLIENT_SERVER)
 236                         return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
 237                                                   Client_ID(from), Req->argv[0]);
 238         }
 239
 240         if (target != Client_ThisServer()) {
 241                 /* Forward CONNECT command ... */
 242                 if (Req->argc == 3)
 243                         IRC_WriteStrClientPrefix(target, from,
 244                                  "CONNECT %s %s :%s", Req->argv[0],
 245                                  Req->argv[1], Req->argv[2]);
 246                 else
 247                         IRC_WriteStrClientPrefix(target, from,
 248                                 "CONNECT %s %s %s %s %s :%s", Req->argv[0],
 249                                 Req->argv[1], Req->argv[2], Req->argv[3],
 250                                 Req->argv[4], Req->argv[5]);
 251                 return CONNECTED;
 252         }
 253
 254         if (!Op_Check(from, Req))
 255                 return Op_NoPrivileges(Client, Req);
 256
 257         switch (Req->argc) {
 258         case 1:
 259                 if (!Conf_EnablePassiveServer(Req->argv[0]))
 260                         return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
 261                                                   Client_ID(from),
 262                                                   Req->argv[0]);
 263                 break;
 264         case 2:
 265         case 3:
 266                 /* Connect configured server */
 267                 if (!Conf_EnableServer
 268                     (Req->argv[0], (UINT16) atoi(Req->argv[1])))
 269                         return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
 270                                                   Client_ID(from),
 271                                                   Req->argv[0]);
 272                 break;
 273         default:
 274                 /* Add server */
 275                 if (!Conf_AddServer
 276                     (Req->argv[0], (UINT16) atoi(Req->argv[1]), Req->argv[2],
 277                      Req->argv[3], Req->argv[4]))
 278                         return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
 279                                                   Client_ID(from),
 280                                                   Req->argv[0]);
 281         }
 282
 283         Log(LOG_NOTICE | LOG_snotice,
 284             "Got CONNECT command from \"%s\" for \"%s\".", Client_Mask(from),
 285             Req->argv[0]);
 286         IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
 287                         "Received CONNECT %s from %s",
 288                         Req->argv[0], Client_ID(from));
 289
 290         return CONNECTED;
 291 } /* IRC_CONNECT */
 292
 293 /**
 294  * Handler for the IRC "DISCONNECT" command.
 295  *
 296  * This command is not specified in the IRC RFCs, it is an extension
 297  * of ngIRCd: it shuts down and disables a configured server connection.
 298  *
 299  * @param Client The client from which this command has been received.
 300  * @param Req Request structure with prefix and all parameters.
 301  * @return CONNECTED or DISCONNECTED.
 302  */
 303 GLOBAL bool
 304 IRC_DISCONNECT(CLIENT * Client, REQUEST * Req)
 305 {
 306         CONN_ID my_conn;
 307
 308         assert(Client != NULL);
 309         assert(Req != NULL);
 310
 311         if (!Op_Check(Client, Req))
 312                 return Op_NoPrivileges(Client, Req);
 313
 314         IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
 315                         "Received DISCONNECT %s from %s",
 316                         Req->argv[0], Client_ID(Client));
 317
 318         Log(LOG_NOTICE | LOG_snotice,
 319             "Got DISCONNECT command from \"%s\" for \"%s\".",
 320             Client_Mask(Client), Req->argv[0]);
 321
 322         /* Save ID of this connection */
 323         my_conn = Client_Conn(Client);
 324
 325         /* Disconnect configured server */
 326         if (!Conf_DisableServer(Req->argv[0]))
 327                 return IRC_WriteErrClient(Client, ERR_NOSUCHSERVER_MSG,
 328                                           Client_ID(Client), Req->argv[0]);
 329
 330         /* Are we still connected or were we killed, too? */
 331         if (Conn_GetClient(my_conn))
 332                 return CONNECTED;
 333         else
 334                 return DISCONNECTED;
 335 } /* IRC_DISCONNECT */
 336
 337 /**
 338  * Handler for the IRC "WALLOPS" command.
 339  *
 340  * @param Client The client from which this command has been received.
 341  * @param Req Request structure with prefix and all parameters.
 342  * @return CONNECTED or DISCONNECTED.
 343  */
 344 GLOBAL bool
 345 IRC_WALLOPS( CLIENT *Client, REQUEST *Req )
 346 {
 347         CLIENT *from;
 348
 349         assert( Client != NULL );
 350         assert( Req != NULL );
 351
 352         switch (Client_Type(Client)) {
 353         case CLIENT_USER:
 354                 if (!Op_Check(Client, Req))
 355                         return Op_NoPrivileges(Client, Req);
 356                 from = Client;
 357                 break;
 358         case CLIENT_SERVER:
 359                 from = Client_Search(Req->prefix);
 360                 break;
 361         default:
 362                 return CONNECTED;
 363         }
 364
 365         if (!from)
 366                 return IRC_WriteErrClient(Client, ERR_NOSUCHNICK_MSG,
 367                                           Client_ID(Client), Req->prefix);
 368
 369         IRC_SendWallops(Client, from, "%s", Req->argv[0]);
 370         return CONNECTED;
 371 } /* IRC_WALLOPS */
 372
 373 /**
 374  * Handle <?>LINE commands (GLINE, KLINE).
 375  *
 376  * @param Client The client from which this command has been received.
 377  * @param Req Request structure with prefix and all parameters.
 378  * @return CONNECTED or DISCONNECTED.
 379  */
 380 GLOBAL bool
 381 IRC_xLINE(CLIENT *Client, REQUEST *Req)
 382 {
 383         CLIENT *from, *c, *c_next;
 384         char reason[COMMAND_LEN], class_c;
 385         struct list_head *list;
 386         time_t timeout;
 387         int class;
 388
 389         assert(Client != NULL);
 390         assert(Req != NULL);
 391
 392         /* Bad number of parameters? */
 393         if (Req->argc != 1 && Req->argc != 3)
 394                 return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 395                                           Client_ID(Client), Req->command);
 396
 397         from = Op_Check(Client, Req);
 398         if (!from)
 399                 return Op_NoPrivileges(Client, Req);
 400
 401         switch(Req->command[0]) {
 402                 case 'g':
 403                 case 'G':
 404                         class = CLASS_GLINE; class_c = 'G';
 405                         break;
 406                 case 'k':
 407                 case 'K':
 408                         class = CLASS_KLINE; class_c = 'K';
 409                         break;
 410                 default:
 411                         Log(LOG_CRIT,
 412                             "IRC_xLINE() called for unknown line: %c!? Ignored.",
 413                             Req->command[0]);
 414                         return CONNECTED;
 415         }
 416
 417         if (Req->argc == 1) {
 418                 /* Delete mask from list */
 419                 Class_DeleteMask(class, Req->argv[0]);
 420                 Log(LOG_NOTICE|LOG_snotice,
 421                     "\"%s\" deleted \"%s\" from %c-Line list.",
 422                     Client_Mask(from), Req->argv[0], class_c);
 423                 if (class == CLASS_GLINE) {
 424                         /* Inform other servers */
 425                         IRC_WriteStrServersPrefix(Client, from, "%s %s",
 426                                                   Req->command, Req->argv[0]);
 427
 428                 }
 429         } else {
 430                 /* Add new mask to list */
 431                 timeout = atol(Req->argv[1]);
 432                 if (timeout > 0)
 433                         timeout += time(NULL);
 434                 if (Class_AddMask(class, Req->argv[0],
 435                                   timeout,
 436                                   Req->argv[2])) {
 437                         Log(LOG_NOTICE|LOG_snotice,
 438                             "\"%s\" added \"%s\" to %c-Line list: \"%s\" (%ld seconds).",
 439                             Client_Mask(from), Req->argv[0], class_c,
 440                             Req->argv[2], atol(Req->argv[1]));
 441                         if (class == CLASS_GLINE) {
 442                                 /* Inform other servers */
 443                                 IRC_WriteStrServersPrefix(Client, from,
 444                                                 "%s %s %s :%s", Req->command,
 445                                                 Req->argv[0], Req->argv[1],
 446                                                 Req->argv[2]);
 447                         }
 448
 449                         /* Check currently connected clients */
 450                         snprintf(reason, sizeof(reason), "%c-Line by \"%s\": \"%s\"",
 451                                  class_c, Client_ID(from), Req->argv[2]);
 452                         list = Class_GetList(class);
 453                         c = Client_First();
 454                         while (c) {
 455                                 c_next = Client_Next(c);
 456                                 if ((class == CLASS_GLINE || Client_Conn(c) > NONE)
 457                                     && Lists_Check(list, c))
 458                                         IRC_KillClient(Client, NULL,
 459                                                        Client_ID(c), reason);
 460                                 c = c_next;
 461                         }
 462                 }
 463         }
 464
 465         return CONNECTED;
 466 }
 467
 468 /* -eof- */