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         IRC_WriteStrClient(Client, RPL_REHASHING_MSG, Client_ID(Client));
 187
 188         raise(SIGHUP);
 189
 190         return CONNECTED;
 191 } /* IRC_REHASH */
 192
 193 /**
 194  * Handler for the IRC "RESTART" command.
 195  *
 196  * See RFC 2812, 4.4 "Restart message".
 197  *
 198  * @param Client The client from which this command has been received.
 199  * @param Req Request structure with prefix and all parameters.
 200  * @return CONNECTED or DISCONNECTED.
 201  */
 202 GLOBAL bool
 203 IRC_RESTART( CLIENT *Client, REQUEST *Req )
 204 {
 205         /* Restart IRC server (fork a new process) */
 206
 207         assert( Client != NULL );
 208         assert( Req != NULL );
 209
 210         if (!Op_Check(Client, Req))
 211                 return Op_NoPrivileges(Client, Req);
 212
 213         /* Bad number of parameters? */
 214         if (Req->argc != 0)
 215                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 216                                           Client_ID(Client), Req->command);
 217
 218         Log(LOG_NOTICE|LOG_snotice, "Got RESTART command from \"%s\" ...",
 219             Client_Mask(Client));
 220         NGIRCd_SignalRestart = true;
 221
 222         return CONNECTED;
 223 } /* IRC_RESTART */
 224
 225 /**
 226  * Handler for the IRC "CONNECT" command.
 227  *
 228  * See RFC 2812, 3.4.7 "Connect message".
 229  *
 230  * @param Client The client from which this command has been received.
 231  * @param Req Request structure with prefix and all parameters.
 232  * @return CONNECTED or DISCONNECTED.
 233  */
 234 GLOBAL bool
 235 IRC_CONNECT(CLIENT * Client, REQUEST * Req)
 236 {
 237         CLIENT *from, *target;
 238
 239         assert(Client != NULL);
 240         assert(Req != NULL);
 241
 242         if (Client_Type(Client) != CLIENT_SERVER
 243             && !Client_HasMode(Client, 'o'))
 244                 return Op_NoPrivileges(Client, Req);
 245
 246         /* Bad number of parameters? */
 247         if (Req->argc != 1 && Req->argc != 2 && Req->argc != 3 &&
 248             Req->argc != 5 && Req->argc != 6)
 249                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 250                                           Client_ID(Client), Req->command);
 251
 252         /* Invalid port number? */
 253         if ((Req->argc > 1) && atoi(Req->argv[1]) < 1)
 254                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 255                                           Client_ID(Client), Req->command);
 256
 257         from = Client;
 258         target = Client_ThisServer();
 259
 260         if (Req->argc == 3 || Req->argc == 6) {
 261                 /* This CONNECT has a target parameter */
 262                 if (Client_Type(Client) == CLIENT_SERVER && Req->prefix)
 263                         from = Client_Search(Req->prefix);
 264                 if (! from)
 265                         return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 266                                         Client_ID(Client), Req->prefix);
 267
 268                 target = (Req->argc == 3) ? Client_Search(Req->argv[2])
 269                                           : Client_Search(Req->argv[5]);
 270                 if (! target || Client_Type(target) != CLIENT_SERVER)
 271                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 272                                         Client_ID(from), Req->argv[0]);
 273         }
 274
 275         if (target != Client_ThisServer()) {
 276                 /* Forward CONNECT command ... */
 277                 if (Req->argc == 3)
 278                         IRC_WriteStrClientPrefix(target, from,
 279                                  "CONNECT %s %s :%s", Req->argv[0],
 280                                  Req->argv[1], Req->argv[2]);
 281                 else
 282                         IRC_WriteStrClientPrefix(target, from,
 283                                 "CONNECT %s %s %s %s %s :%s", Req->argv[0],
 284                                 Req->argv[1], Req->argv[2], Req->argv[3],
 285                                 Req->argv[4], Req->argv[5]);
 286                 return CONNECTED;
 287         }
 288
 289         if (!Op_Check(from, Req))
 290                 return Op_NoPrivileges(Client, Req);
 291
 292         switch (Req->argc) {
 293         case 1:
 294                 if (!Conf_EnablePassiveServer(Req->argv[0]))
 295                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 296                                                   Client_ID(from),
 297                                                   Req->argv[0]);
 298                 break;
 299         case 2:
 300         case 3:
 301                 /* Connect configured server */
 302                 if (!Conf_EnableServer
 303                     (Req->argv[0], (UINT16) atoi(Req->argv[1])))
 304                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 305                                                   Client_ID(from),
 306                                                   Req->argv[0]);
 307                 break;
 308         default:
 309                 /* Add server */
 310                 if (!Conf_AddServer
 311                     (Req->argv[0], (UINT16) atoi(Req->argv[1]), Req->argv[2],
 312                      Req->argv[3], Req->argv[4]))
 313                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 314                                                   Client_ID(from),
 315                                                   Req->argv[0]);
 316         }
 317
 318         Log(LOG_NOTICE | LOG_snotice,
 319             "Got CONNECT command from \"%s\" for \"%s\".", Client_Mask(from),
 320             Req->argv[0]);
 321         IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
 322                         "Received CONNECT %s from %s",
 323                         Req->argv[0], Client_ID(from));
 324
 325         return CONNECTED;
 326 } /* IRC_CONNECT */
 327
 328 /**
 329  * Handler for the IRC "DISCONNECT" command.
 330  *
 331  * This command is not specified in the IRC RFCs, it is an extension
 332  * of ngIRCd: it shuts down and disables a configured server connection.
 333  *
 334  * @param Client The client from which this command has been received.
 335  * @param Req Request structure with prefix and all parameters.
 336  * @return CONNECTED or DISCONNECTED.
 337  */
 338 GLOBAL bool
 339 IRC_DISCONNECT(CLIENT * Client, REQUEST * Req)
 340 {
 341         CONN_ID my_conn;
 342
 343         assert(Client != NULL);
 344         assert(Req != NULL);
 345
 346         if (!Op_Check(Client, Req))
 347                 return Op_NoPrivileges(Client, Req);
 348
 349         /* Bad number of parameters? */
 350         if (Req->argc != 1)
 351                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 352                                           Client_ID(Client), Req->command);
 353
 354         IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
 355                         "Received DISCONNECT %s from %s",
 356                         Req->argv[0], Client_ID(Client));
 357
 358         Log(LOG_NOTICE | LOG_snotice,
 359             "Got DISCONNECT command from \"%s\" for \"%s\".",
 360             Client_Mask(Client), Req->argv[0]);
 361
 362         /* Save ID of this connection */
 363         my_conn = Client_Conn(Client);
 364
 365         /* Disconnect configured server */
 366         if (!Conf_DisableServer(Req->argv[0]))
 367                 return IRC_WriteStrClient(Client, ERR_NOSUCHSERVER_MSG,
 368                                           Client_ID(Client), Req->argv[0]);
 369
 370         /* Are we still connected or were we killed, too? */
 371         if (Conn_GetClient(my_conn))
 372                 return CONNECTED;
 373         else
 374                 return DISCONNECTED;
 375 } /* IRC_DISCONNECT */
 376
 377 /**
 378  * Handler for the IRC "WALLOPS" command.
 379  *
 380  * See RFC 2812, 4.7 "Operwall message".
 381  *
 382  * @param Client The client from which this command has been received.
 383  * @param Req Request structure with prefix and all parameters.
 384  * @return CONNECTED or DISCONNECTED.
 385  */
 386 GLOBAL bool
 387 IRC_WALLOPS( CLIENT *Client, REQUEST *Req )
 388 {
 389         CLIENT *from;
 390
 391         assert( Client != NULL );
 392         assert( Req != NULL );
 393
 394         if (Req->argc != 1)
 395                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 396                                           Client_ID(Client), Req->command);
 397
 398         switch (Client_Type(Client)) {
 399         case CLIENT_USER:
 400                 if (!Client_OperByMe(Client))
 401                         return IRC_WriteStrClient(Client, ERR_NOPRIVILEGES_MSG,
 402                                                   Client_ID(Client));
 403                 from = Client;
 404                 break;
 405         case CLIENT_SERVER:
 406                 from = Client_Search(Req->prefix);
 407                 break;
 408         default:
 409                 return CONNECTED;
 410         }
 411
 412         if (!from)
 413                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 414                                           Client_ID(Client), Req->prefix);
 415
 416         IRC_SendWallops(Client, from, "%s", Req->argv[0]);
 417         return CONNECTED;
 418 } /* IRC_WALLOPS */
 419
 420 /**
 421  * Handle <?>LINE commands (GLINE, KLINE).
 422  *
 423  * @param Client The client from which this command has been received.
 424  * @param Req Request structure with prefix and all parameters.
 425  * @return CONNECTED or DISCONNECTED.
 426  */
 427 GLOBAL bool
 428 IRC_xLINE(CLIENT *Client, REQUEST *Req)
 429 {
 430         CLIENT *from;
 431         int class;
 432         char class_c;
 433
 434         assert(Client != NULL);
 435         assert(Req != NULL);
 436
 437         from = Op_Check(Client, Req);
 438         if (!from)
 439                 return Op_NoPrivileges(Client, Req);
 440
 441         /* Bad number of parameters? */
 442         if (Req->argc != 1 && Req->argc != 3)
 443                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 444                                           Client_ID(Client), Req->command);
 445
 446         switch(Req->command[0]) {
 447                 case 'g':
 448                 case 'G':
 449                         class = CLASS_GLINE; class_c = 'G';
 450                         break;
 451                 case 'k':
 452                 case 'K':
 453                         class = CLASS_KLINE; class_c = 'K';
 454                         break;
 455                 default:
 456                         Log(LOG_CRIT,
 457                             "IRC_xLINE() called for unknown line: %c!? Ignored.",
 458                             Req->command[0]);
 459                         return CONNECTED;
 460         }
 461
 462         if (Req->argc == 1) {
 463                 /* Delete mask from list */
 464                 Class_DeleteMask(class, Req->argv[0]);
 465                 Log(LOG_NOTICE|LOG_snotice,
 466                     "\"%s\" deleted \"%s\" from %c-Line list.",
 467                     Client_Mask(from), Req->argv[0], class_c);
 468                 if (class == CLASS_GLINE) {
 469                         /* Inform other servers */
 470                         IRC_WriteStrServersPrefix(Client, from, "%s %s",
 471                                                   Req->command, Req->argv[0]);
 472
 473                 }
 474         } else {
 475                 /* Add new mask to list */
 476                 if (Class_AddMask(class, Req->argv[0],
 477                                   time(NULL) + atol(Req->argv[1]),
 478                                   Req->argv[2])) {
 479                         Log(LOG_NOTICE|LOG_snotice,
 480                             "\"%s\" added \"%s\" to %c-Line list: \"%s\" (%ld seconds).",
 481                             Client_Mask(from), Req->argv[0], class_c,
 482                             Req->argv[2], atol(Req->argv[1]));
 483                         if (class == CLASS_GLINE) {
 484                                 /* Inform other servers */
 485                                 IRC_WriteStrServersPrefix(Client, from,
 486                                                 "%s %s %s :%s", Req->command,
 487                                                 Req->argv[0], Req->argv[1],
 488                                                 Req->argv[2]);
 489                         }
 490                 }
 491         }
 492
 493         return CONNECTED;
 494 }
 495
 496 /* -eof- */