src/ngircd/irc-oper.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2011 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 "imp.h"
  20 #include <assert.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <signal.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 "irc-write.h"
  32 #include "log.h"
  33 #include "match.h"
  34 #include "messages.h"
  35 #include "parse.h"
  36 #include "op.h"
  37
  38 #include <exp.h>
  39 #include "irc-oper.h"
  40
  41 /**
  42  * Handle invalid received OPER command.
  43  * Log OPER attempt and send error message to client.
  44  */
  45 static bool
  46 Bad_OperPass(CLIENT *Client, char *errtoken, char *errmsg)
  47 {
  48         Log(LOG_WARNING, "Got invalid OPER from \"%s\": \"%s\" -- %s",
  49             Client_Mask(Client), errtoken, errmsg);
  50         IRC_SetPenalty(Client, 3);
  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  * See RFC 2812, 3.1.4 "Oper message".
  59  *
  60  * @param Client The client from which this command has been received.
  61  * @param Req Request structure with prefix and all parameters.
  62  * @return CONNECTED or DISCONNECTED.
  63  */
  64 GLOBAL bool
  65 IRC_OPER( CLIENT *Client, REQUEST *Req )
  66 {
  67         struct Conf_Oper *op;
  68         size_t len, i;
  69
  70         assert( Client != NULL );
  71         assert( Req != NULL );
  72
  73         if (Req->argc != 2)
  74                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
  75                                           Client_ID(Client), Req->command);
  76
  77         len = array_length(&Conf_Opers, sizeof(*op));
  78         op = array_start(&Conf_Opers);
  79         for (i = 0; i < len && strcmp(op[i].name, Req->argv[0]); i++)
  80                 ;
  81         if (i >= len)
  82                 return Bad_OperPass(Client, Req->argv[0], "not configured");
  83
  84         if (strcmp(op[i].pwd, Req->argv[1]) != 0)
  85                 return Bad_OperPass(Client, op[i].name, "bad password");
  86
  87         if (op[i].mask && (!Match(op[i].mask, Client_Mask(Client))))
  88                 return Bad_OperPass(Client, op[i].mask, "hostmask check failed");
  89
  90         if (!Client_HasMode(Client, 'o')) {
  91                 Client_ModeAdd(Client, 'o');
  92                 if (!IRC_WriteStrClient(Client, "MODE %s :+o",
  93                                         Client_ID(Client)))
  94                         return DISCONNECTED;
  95                 IRC_WriteStrServersPrefix(NULL, Client, "MODE %s :+o",
  96                                           Client_ID(Client));
  97         }
  98
  99         if (!Client_OperByMe(Client))
 100                 Log(LOG_NOTICE|LOG_snotice,
 101                     "Got valid OPER from \"%s\", user is an IRC operator now.",
 102                     Client_Mask(Client));
 103
 104         Client_SetOperByMe(Client, true);
 105         return IRC_WriteStrClient(Client, RPL_YOUREOPER_MSG, Client_ID(Client));
 106 } /* IRC_OPER */
 107
 108 /**
 109  * Handler for the IRC "DIE" command.
 110  *
 111  * See RFC 2812, 4.3 "Die message".
 112  *
 113  * @param Client The client from which this command has been received.
 114  * @param Req Request structure with prefix and all parameters.
 115  * @return CONNECTED or DISCONNECTED.
 116  */
 117 GLOBAL bool
 118 IRC_DIE(CLIENT * Client, REQUEST * Req)
 119 {
 120         /* Shut down server */
 121
 122         CONN_ID c;
 123         CLIENT *cl;
 124
 125         assert(Client != NULL);
 126         assert(Req != NULL);
 127
 128         if (!Op_Check(Client, Req))
 129                 return Op_NoPrivileges(Client, Req);
 130
 131         /* Bad number of parameters? */
 132 #ifdef STRICT_RFC
 133         if (Req->argc != 0)
 134 #else
 135         if (Req->argc > 1)
 136 #endif
 137                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 138                                           Client_ID(Client), Req->command);
 139
 140         /* Is a message given? */
 141         if (Req->argc > 0) {
 142                 c = Conn_First();
 143                 while (c != NONE) {
 144                         cl = Conn_GetClient(c);
 145                         if (Client_Type(cl) == CLIENT_USER)
 146                                 IRC_WriteStrClient(cl, "NOTICE %s :%s",
 147                                                 Client_ID(cl), Req->argv[0]);
 148                         c = Conn_Next(c);
 149                 }
 150         }
 151
 152         Log(LOG_NOTICE | LOG_snotice, "Got DIE command from \"%s\" ...",
 153             Client_Mask(Client));
 154         NGIRCd_SignalQuit = true;
 155
 156         return CONNECTED;
 157 } /* IRC_DIE */
 158
 159 /**
 160  * Handler for the IRC "REHASH" command.
 161  *
 162  * See RFC 2812, 4.2 "Rehash message".
 163  *
 164  * @param Client The client from which this command has been received.
 165  * @param Req Request structure with prefix and all parameters.
 166  * @return CONNECTED or DISCONNECTED.
 167  */
 168 GLOBAL bool
 169 IRC_REHASH( CLIENT *Client, REQUEST *Req )
 170 {
 171         /* Reload configuration file */
 172
 173         assert( Client != NULL );
 174         assert( Req != NULL );
 175
 176         if (!Op_Check(Client, Req))
 177                 return Op_NoPrivileges(Client, Req);
 178
 179         /* Bad number of parameters? */
 180         if (Req->argc != 0)
 181                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 182                                           Client_ID(Client), Req->command );
 183
 184         Log(LOG_NOTICE|LOG_snotice, "Got REHASH command from \"%s\" ...",
 185             Client_Mask(Client));
 186         raise(SIGHUP);
 187
 188         return CONNECTED;
 189 } /* IRC_REHASH */
 190
 191 /**
 192  * Handler for the IRC "RESTART" command.
 193  *
 194  * See RFC 2812, 4.4 "Restart message".
 195  *
 196  * @param Client The client from which this command has been received.
 197  * @param Req Request structure with prefix and all parameters.
 198  * @return CONNECTED or DISCONNECTED.
 199  */
 200 GLOBAL bool
 201 IRC_RESTART( CLIENT *Client, REQUEST *Req )
 202 {
 203         /* Restart IRC server (fork a new process) */
 204
 205         assert( Client != NULL );
 206         assert( Req != NULL );
 207
 208         if (!Op_Check(Client, Req))
 209                 return Op_NoPrivileges(Client, Req);
 210
 211         /* Bad number of parameters? */
 212         if (Req->argc != 0)
 213                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 214                                           Client_ID(Client), Req->command);
 215
 216         Log(LOG_NOTICE|LOG_snotice, "Got RESTART command from \"%s\" ...",
 217             Client_Mask(Client));
 218         NGIRCd_SignalRestart = true;
 219
 220         return CONNECTED;
 221 } /* IRC_RESTART */
 222
 223 /**
 224  * Handler for the IRC "CONNECT" command.
 225  *
 226  * See RFC 2812, 3.4.7 "Connect message".
 227  *
 228  * @param Client The client from which this command has been received.
 229  * @param Req Request structure with prefix and all parameters.
 230  * @return CONNECTED or DISCONNECTED.
 231  */
 232 GLOBAL bool
 233 IRC_CONNECT(CLIENT * Client, REQUEST * Req)
 234 {
 235         CLIENT *from, *target;
 236
 237         assert(Client != NULL);
 238         assert(Req != NULL);
 239
 240         if (Client_Type(Client) != CLIENT_SERVER
 241             && !Client_HasMode(Client, 'o'))
 242                 return Op_NoPrivileges(Client, Req);
 243
 244         /* Bad number of parameters? */
 245         if (Req->argc != 1 && Req->argc != 2 && Req->argc != 3 &&
 246             Req->argc != 5 && Req->argc != 6)
 247                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 248                                           Client_ID(Client), Req->command);
 249
 250         /* Invalid port number? */
 251         if ((Req->argc > 1) && atoi(Req->argv[1]) < 1)
 252                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 253                                           Client_ID(Client), Req->command);
 254
 255         from = Client;
 256         target = Client_ThisServer();
 257
 258         if (Req->argc == 3 || Req->argc == 6) {
 259                 /* This CONNECT has a target parameter */
 260                 if (Client_Type(Client) == CLIENT_SERVER && Req->prefix)
 261                         from = Client_Search(Req->prefix);
 262                 if (! from)
 263                         return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 264                                         Client_ID(Client), Req->prefix);
 265
 266                 target = (Req->argc == 3) ? Client_Search(Req->argv[2])
 267                                           : Client_Search(Req->argv[5]);
 268                 if (! target || Client_Type(target) != CLIENT_SERVER)
 269                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 270                                         Client_ID(from), Req->argv[0]);
 271         }
 272
 273         if (target != Client_ThisServer()) {
 274                 /* Forward CONNECT command ... */
 275                 if (Req->argc == 3)
 276                         IRC_WriteStrClientPrefix(target, from,
 277                                  "CONNECT %s %s :%s", Req->argv[0],
 278                                  Req->argv[1], Req->argv[2]);
 279                 else
 280                         IRC_WriteStrClientPrefix(target, from,
 281                                 "CONNECT %s %s %s %s %s :%s", Req->argv[0],
 282                                 Req->argv[1], Req->argv[2], Req->argv[3],
 283                                 Req->argv[4], Req->argv[5]);
 284                 return CONNECTED;
 285         }
 286
 287         if (!Op_Check(from, Req))
 288                 return Op_NoPrivileges(Client, Req);
 289
 290         switch (Req->argc) {
 291         case 1:
 292                 if (!Conf_EnablePassiveServer(Req->argv[0]))
 293                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 294                                                   Client_ID(from),
 295                                                   Req->argv[0]);
 296                 break;
 297         case 2:
 298         case 3:
 299                 /* Connect configured server */
 300                 if (!Conf_EnableServer
 301                     (Req->argv[0], (UINT16) atoi(Req->argv[1])))
 302                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 303                                                   Client_ID(from),
 304                                                   Req->argv[0]);
 305                 break;
 306         default:
 307                 /* Add server */
 308                 if (!Conf_AddServer
 309                     (Req->argv[0], (UINT16) atoi(Req->argv[1]), Req->argv[2],
 310                      Req->argv[3], Req->argv[4]))
 311                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 312                                                   Client_ID(from),
 313                                                   Req->argv[0]);
 314         }
 315
 316         Log(LOG_NOTICE | LOG_snotice,
 317             "Got CONNECT command from \"%s\" for \"%s\".", Client_Mask(from),
 318             Req->argv[0]);
 319         IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
 320                         "Received CONNECT %s from %s",
 321                         Req->argv[0], Client_ID(from));
 322
 323         return CONNECTED;
 324 } /* IRC_CONNECT */
 325
 326 /**
 327  * Handler for the IRC "DISCONNECT" command.
 328  *
 329  * This command is not specified in the IRC RFCs, it is an extension
 330  * of ngIRCd: it shuts down and disables a configured server connection.
 331  *
 332  * @param Client The client from which this command has been received.
 333  * @param Req Request structure with prefix and all parameters.
 334  * @return CONNECTED or DISCONNECTED.
 335  */
 336 GLOBAL bool
 337 IRC_DISCONNECT(CLIENT * Client, REQUEST * Req)
 338 {
 339         CONN_ID my_conn;
 340
 341         assert(Client != NULL);
 342         assert(Req != NULL);
 343
 344         if (!Op_Check(Client, Req))
 345                 return Op_NoPrivileges(Client, Req);
 346
 347         /* Bad number of parameters? */
 348         if (Req->argc != 1)
 349                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 350                                           Client_ID(Client), Req->command);
 351
 352         IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
 353                         "Received DISCONNECT %s from %s",
 354                         Req->argv[0], Client_ID(Client));
 355
 356         Log(LOG_NOTICE | LOG_snotice,
 357             "Got DISCONNECT command from \"%s\" for \"%s\".",
 358             Client_Mask(Client), Req->argv[0]);
 359
 360         /* Save ID of this connection */
 361         my_conn = Client_Conn(Client);
 362
 363         /* Disconnect configured server */
 364         if (!Conf_DisableServer(Req->argv[0]))
 365                 return IRC_WriteStrClient(Client, ERR_NOSUCHSERVER_MSG,
 366                                           Client_ID(Client), Req->argv[0]);
 367
 368         /* Are we still connected or were we killed, too? */
 369         if (Conn_GetClient(my_conn))
 370                 return CONNECTED;
 371         else
 372                 return DISCONNECTED;
 373 } /* IRC_DISCONNECT */
 374
 375 /**
 376  * Handler for the IRC "WALLOPS" command.
 377  *
 378  * See RFC 2812, 4.7 "Operwall message".
 379  *
 380  * @param Client The client from which this command has been received.
 381  * @param Req Request structure with prefix and all parameters.
 382  * @return CONNECTED or DISCONNECTED.
 383  */
 384 GLOBAL bool
 385 IRC_WALLOPS( CLIENT *Client, REQUEST *Req )
 386 {
 387         CLIENT *from;
 388
 389         assert( Client != NULL );
 390         assert( Req != NULL );
 391
 392         if (Req->argc != 1)
 393                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 394                                           Client_ID(Client), Req->command);
 395
 396         switch (Client_Type(Client)) {
 397         case CLIENT_USER:
 398                 if (!Client_OperByMe(Client))
 399                         return IRC_WriteStrClient(Client, ERR_NOPRIVILEGES_MSG,
 400                                                   Client_ID(Client));
 401                 from = Client;
 402                 break;
 403         case CLIENT_SERVER:
 404                 from = Client_Search(Req->prefix);
 405                 break;
 406         default:
 407                 return CONNECTED;
 408         }
 409
 410         if (!from)
 411                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 412                                           Client_ID(Client), Req->prefix);
 413
 414         IRC_SendWallops(Client, from, "%s", Req->argv[0]);
 415         return CONNECTED;
 416 } /* IRC_WALLOPS */
 417
 418 /**
 419  * Handle <?>LINE commands (GLINE, KLINE).
 420  *
 421  * @param Client The client from which this command has been received.
 422  * @param Req Request structure with prefix and all parameters.
 423  * @return CONNECTED or DISCONNECTED.
 424  */
 425 GLOBAL bool
 426 IRC_xLINE(CLIENT *Client, REQUEST *Req)
 427 {
 428         CLIENT *from;
 429         int class;
 430         char class_c;
 431
 432         assert(Client != NULL);
 433         assert(Req != NULL);
 434
 435         from = Op_Check(Client, Req);
 436         if (!from)
 437                 return Op_NoPrivileges(Client, Req);
 438
 439         /* Bad number of parameters? */
 440         if (Req->argc != 1 && Req->argc != 3)
 441                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 442                                           Client_ID(Client), Req->command);
 443
 444         switch(Req->command[0]) {
 445                 case 'g':
 446                 case 'G':
 447                         class = CLASS_GLINE; class_c = 'G';
 448                         break;
 449                 case 'k':
 450                 case 'K':
 451                         class = CLASS_KLINE; class_c = 'K';
 452                         break;
 453                 default:
 454                         Log(LOG_CRIT,
 455                             "IRC_xLINE() called for unknown line: %c!? Ignored.",
 456                             Req->command[0]);
 457                         return CONNECTED;
 458         }
 459
 460         if (Req->argc == 1) {
 461                 /* Delete mask from list */
 462                 Class_DeleteMask(class, Req->argv[0]);
 463                 Log(LOG_NOTICE|LOG_snotice,
 464                     "\"%s\" deleted \"%s\" from %c-Line list.",
 465                     Client_Mask(from), Req->argv[0], class_c);
 466                 if (class == CLASS_GLINE) {
 467                         /* Inform other servers */
 468                         IRC_WriteStrServersPrefix(Client, from, "%s %s",
 469                                                   Req->command, Req->argv[0]);
 470
 471                 }
 472         } else {
 473                 /* Add new mask to list */
 474                 if (Class_AddMask(class, Req->argv[0],
 475                                   time(NULL) + atol(Req->argv[1]),
 476                                   Req->argv[2])) {
 477                         Log(LOG_NOTICE|LOG_snotice,
 478                             "\"%s\" added \"%s\" to %c-Line list: \"%s\" (%ld seconds).",
 479                             Client_Mask(from), Req->argv[0], class_c,
 480                             Req->argv[2], atol(Req->argv[1]));
 481                         if (class == CLASS_GLINE) {
 482                                 /* Inform other servers */
 483                                 IRC_WriteStrServersPrefix(Client, from,
 484                                                 "%s %s %s :%s", Req->command,
 485                                                 Req->argv[0], Req->argv[1],
 486                                                 Req->argv[2]);
 487                         }
 488                 }
 489         }
 490
 491         return CONNECTED;
 492 }
 493
 494 /* -eof- */