src/ngircd/irc-oper.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2013 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-macros.h"
  32 #include "irc-write.h"
  33 #include "log.h"
  34 #include "match.h"
  35 #include "messages.h"
  36 #include "parse.h"
  37 #include "op.h"
  38
  39 #include <exp.h>
  40 #include "irc-oper.h"
  41
  42 /**
  43  * Handle invalid received OPER command.
  44  * Log OPER attempt and send error message to client.
  45  */
  46 static bool
  47 Bad_OperPass(CLIENT *Client, char *errtoken, char *errmsg)
  48 {
  49         Log(LOG_WARNING, "Got invalid OPER from \"%s\": \"%s\" -- %s",
  50             Client_Mask(Client), errtoken, errmsg);
  51         return IRC_WriteErrClient(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         _IRC_ARGC_EQ_OR_RETURN_(Client, Req, 2)
  72
  73         len = array_length(&Conf_Opers, sizeof(*op));
  74         op = array_start(&Conf_Opers);
  75         for (i = 0; i < len && strcmp(op[i].name, Req->argv[0]); i++)
  76                 ;
  77         if (i >= len)
  78                 return Bad_OperPass(Client, Req->argv[0], "not configured");
  79
  80         if (strcmp(op[i].pwd, Req->argv[1]) != 0)
  81                 return Bad_OperPass(Client, op[i].name, "bad password");
  82
  83         if (op[i].mask && (!Match(op[i].mask, Client_Mask(Client))))
  84                 return Bad_OperPass(Client, op[i].mask, "hostmask check failed");
  85
  86         if (!Client_HasMode(Client, 'o')) {
  87                 Client_ModeAdd(Client, 'o');
  88                 if (!IRC_WriteStrClient(Client, "MODE %s :+o",
  89                                         Client_ID(Client)))
  90                         return DISCONNECTED;
  91                 IRC_WriteStrServersPrefix(NULL, Client, "MODE %s :+o",
  92                                           Client_ID(Client));
  93         }
  94
  95         if (!Client_OperByMe(Client))
  96                 Log(LOG_NOTICE|LOG_snotice,
  97                     "Got valid OPER for \"%s\" from \"%s\", user is an IRC operator now.",
  98                     Req->argv[0], Client_Mask(Client));
  99
 100         Client_SetOperByMe(Client, true);
 101         return IRC_WriteStrClient(Client, RPL_YOUREOPER_MSG, Client_ID(Client));
 102 } /* IRC_OPER */
 103
 104 /**
 105  * Handler for the IRC "DIE" command.
 106  *
 107  * @param Client The client from which this command has been received.
 108  * @param Req Request structure with prefix and all parameters.
 109  * @return CONNECTED or DISCONNECTED.
 110  */
 111 GLOBAL bool
 112 IRC_DIE(CLIENT * Client, REQUEST * Req)
 113 {
 114         /* Shut down server */
 115
 116         CONN_ID c;
 117         CLIENT *cl;
 118
 119         assert(Client != NULL);
 120         assert(Req != NULL);
 121
 122 #ifdef STRICT_RFC
 123         _IRC_ARGC_EQ_OR_RETURN_(Client, Req, 0)
 124 #else
 125         _IRC_ARGC_LE_OR_RETURN_(Client, Req, 1)
 126 #endif
 127
 128         if (!Op_Check(Client, Req))
 129                 return Op_NoPrivileges(Client, Req);
 130
 131         /* Is a message given? */
 132         if (Req->argc > 0) {
 133                 c = Conn_First();
 134                 while (c != NONE) {
 135                         cl = Conn_GetClient(c);
 136                         if (Client_Type(cl) == CLIENT_USER)
 137                                 IRC_WriteStrClient(cl, "NOTICE %s :%s",
 138                                                 Client_ID(cl), Req->argv[0]);
 139                         c = Conn_Next(c);
 140                 }
 141         }
 142
 143         Log(LOG_NOTICE | LOG_snotice, "Got DIE command from \"%s\" ...",
 144             Client_Mask(Client));
 145         NGIRCd_SignalQuit = true;
 146
 147         return CONNECTED;
 148 } /* IRC_DIE */
 149
 150 /**
 151  * Handler for the IRC "REHASH" command.
 152  *
 153  * @param Client The client from which this command has been received.
 154  * @param Req Request structure with prefix and all parameters.
 155  * @return CONNECTED or DISCONNECTED.
 156  */
 157 GLOBAL bool
 158 IRC_REHASH( CLIENT *Client, REQUEST *Req )
 159 {
 160         /* Reload configuration file */
 161
 162         assert( Client != NULL );
 163         assert( Req != NULL );
 164
 165         _IRC_ARGC_EQ_OR_RETURN_(Client, Req, 0)
 166
 167         if (!Op_Check(Client, Req))
 168                 return Op_NoPrivileges(Client, Req);
 169
 170         Log(LOG_NOTICE|LOG_snotice, "Got REHASH command from \"%s\" ...",
 171             Client_Mask(Client));
 172         IRC_WriteStrClient(Client, RPL_REHASHING_MSG, Client_ID(Client));
 173
 174         raise(SIGHUP);
 175
 176         return CONNECTED;
 177 } /* IRC_REHASH */
 178
 179 /**
 180  * Handler for the IRC "RESTART" command.
 181  *
 182  * @param Client The client from which this command has been received.
 183  * @param Req Request structure with prefix and all parameters.
 184  * @return CONNECTED or DISCONNECTED.
 185  */
 186 GLOBAL bool
 187 IRC_RESTART( CLIENT *Client, REQUEST *Req )
 188 {
 189         /* Restart IRC server (fork a new process) */
 190
 191         assert( Client != NULL );
 192         assert( Req != NULL );
 193
 194         /* Bad number of parameters? */
 195         if (Req->argc != 0)
 196                 return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 197                                           Client_ID(Client), Req->command);
 198
 199         if (!Op_Check(Client, Req))
 200                 return Op_NoPrivileges(Client, Req);
 201
 202         Log(LOG_NOTICE|LOG_snotice, "Got RESTART command from \"%s\" ...",
 203             Client_Mask(Client));
 204         NGIRCd_SignalRestart = true;
 205
 206         return CONNECTED;
 207 } /* IRC_RESTART */
 208
 209 /**
 210  * Handler for the IRC "CONNECT" command.
 211  *
 212  * @param Client The client from which this command has been received.
 213  * @param Req Request structure with prefix and all parameters.
 214  * @return CONNECTED or DISCONNECTED.
 215  */
 216 GLOBAL bool
 217 IRC_CONNECT(CLIENT * Client, REQUEST * Req)
 218 {
 219         CLIENT *from, *target;
 220
 221         assert(Client != NULL);
 222         assert(Req != NULL);
 223
 224         /* Bad number of parameters? */
 225         if (Req->argc != 1 && Req->argc != 2 && Req->argc != 3 &&
 226             Req->argc != 5 && Req->argc != 6)
 227                 return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 228                                           Client_ID(Client), Req->command);
 229
 230         /* Invalid port number? */
 231         if ((Req->argc > 1) && atoi(Req->argv[1]) < 1)
 232                 return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 233                                           Client_ID(Client), Req->command);
 234
 235         if (Client_Type(Client) != CLIENT_SERVER
 236             && !Client_HasMode(Client, 'o'))
 237                 return Op_NoPrivileges(Client, Req);
 238
 239         from = Client;
 240         target = Client_ThisServer();
 241
 242         if (Req->argc == 3 || Req->argc == 6) {
 243                 /* This CONNECT has a target parameter */
 244                 if (Client_Type(Client) == CLIENT_SERVER && Req->prefix)
 245                         from = Client_Search(Req->prefix);
 246                 if (! from)
 247                         return IRC_WriteErrClient(Client, ERR_NOSUCHNICK_MSG,
 248                                                   Client_ID(Client), Req->prefix);
 249
 250                 target = (Req->argc == 3) ? Client_Search(Req->argv[2])
 251                                           : Client_Search(Req->argv[5]);
 252                 if (! target || Client_Type(target) != CLIENT_SERVER)
 253                         return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
 254                                                   Client_ID(from), Req->argv[0]);
 255         }
 256
 257         if (target != Client_ThisServer()) {
 258                 /* Forward CONNECT command ... */
 259                 if (Req->argc == 3)
 260                         IRC_WriteStrClientPrefix(target, from,
 261                                  "CONNECT %s %s :%s", Req->argv[0],
 262                                  Req->argv[1], Req->argv[2]);
 263                 else
 264                         IRC_WriteStrClientPrefix(target, from,
 265                                 "CONNECT %s %s %s %s %s :%s", Req->argv[0],
 266                                 Req->argv[1], Req->argv[2], Req->argv[3],
 267                                 Req->argv[4], Req->argv[5]);
 268                 return CONNECTED;
 269         }
 270
 271         if (!Op_Check(from, Req))
 272                 return Op_NoPrivileges(Client, Req);
 273
 274         switch (Req->argc) {
 275         case 1:
 276                 if (!Conf_EnablePassiveServer(Req->argv[0]))
 277                         return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
 278                                                   Client_ID(from),
 279                                                   Req->argv[0]);
 280                 break;
 281         case 2:
 282         case 3:
 283                 /* Connect configured server */
 284                 if (!Conf_EnableServer
 285                     (Req->argv[0], (UINT16) atoi(Req->argv[1])))
 286                         return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
 287                                                   Client_ID(from),
 288                                                   Req->argv[0]);
 289                 break;
 290         default:
 291                 /* Add server */
 292                 if (!Conf_AddServer
 293                     (Req->argv[0], (UINT16) atoi(Req->argv[1]), Req->argv[2],
 294                      Req->argv[3], Req->argv[4]))
 295                         return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
 296                                                   Client_ID(from),
 297                                                   Req->argv[0]);
 298         }
 299
 300         Log(LOG_NOTICE | LOG_snotice,
 301             "Got CONNECT command from \"%s\" for \"%s\".", Client_Mask(from),
 302             Req->argv[0]);
 303         IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
 304                         "Received CONNECT %s from %s",
 305                         Req->argv[0], Client_ID(from));
 306
 307         return CONNECTED;
 308 } /* IRC_CONNECT */
 309
 310 /**
 311  * Handler for the IRC "DISCONNECT" command.
 312  *
 313  * This command is not specified in the IRC RFCs, it is an extension
 314  * of ngIRCd: it shuts down and disables a configured server connection.
 315  *
 316  * @param Client The client from which this command has been received.
 317  * @param Req Request structure with prefix and all parameters.
 318  * @return CONNECTED or DISCONNECTED.
 319  */
 320 GLOBAL bool
 321 IRC_DISCONNECT(CLIENT * Client, REQUEST * Req)
 322 {
 323         CONN_ID my_conn;
 324
 325         assert(Client != NULL);
 326         assert(Req != NULL);
 327
 328         /* Bad number of parameters? */
 329         if (Req->argc != 1)
 330                 return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 331                                           Client_ID(Client), Req->command);
 332
 333         if (!Op_Check(Client, Req))
 334                 return Op_NoPrivileges(Client, Req);
 335
 336         IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
 337                         "Received DISCONNECT %s from %s",
 338                         Req->argv[0], Client_ID(Client));
 339
 340         Log(LOG_NOTICE | LOG_snotice,
 341             "Got DISCONNECT command from \"%s\" for \"%s\".",
 342             Client_Mask(Client), Req->argv[0]);
 343
 344         /* Save ID of this connection */
 345         my_conn = Client_Conn(Client);
 346
 347         /* Disconnect configured server */
 348         if (!Conf_DisableServer(Req->argv[0]))
 349                 return IRC_WriteErrClient(Client, ERR_NOSUCHSERVER_MSG,
 350                                           Client_ID(Client), Req->argv[0]);
 351
 352         /* Are we still connected or were we killed, too? */
 353         if (Conn_GetClient(my_conn))
 354                 return CONNECTED;
 355         else
 356                 return DISCONNECTED;
 357 } /* IRC_DISCONNECT */
 358
 359 /**
 360  * Handler for the IRC "WALLOPS" command.
 361  *
 362  * @param Client The client from which this command has been received.
 363  * @param Req Request structure with prefix and all parameters.
 364  * @return CONNECTED or DISCONNECTED.
 365  */
 366 GLOBAL bool
 367 IRC_WALLOPS( CLIENT *Client, REQUEST *Req )
 368 {
 369         CLIENT *from;
 370
 371         assert( Client != NULL );
 372         assert( Req != NULL );
 373
 374         _IRC_ARGC_EQ_OR_RETURN_(Client, Req, 1)
 375
 376         switch (Client_Type(Client)) {
 377         case CLIENT_USER:
 378                 if (!Client_OperByMe(Client))
 379                         return IRC_WriteErrClient(Client, ERR_NOPRIVILEGES_MSG,
 380                                                   Client_ID(Client));
 381                 from = Client;
 382                 break;
 383         case CLIENT_SERVER:
 384                 from = Client_Search(Req->prefix);
 385                 break;
 386         default:
 387                 return CONNECTED;
 388         }
 389
 390         if (!from)
 391                 return IRC_WriteErrClient(Client, ERR_NOSUCHNICK_MSG,
 392                                           Client_ID(Client), Req->prefix);
 393
 394         IRC_SendWallops(Client, from, "%s", Req->argv[0]);
 395         return CONNECTED;
 396 } /* IRC_WALLOPS */
 397
 398 /**
 399  * Handle <?>LINE commands (GLINE, KLINE).
 400  *
 401  * @param Client The client from which this command has been received.
 402  * @param Req Request structure with prefix and all parameters.
 403  * @return CONNECTED or DISCONNECTED.
 404  */
 405 GLOBAL bool
 406 IRC_xLINE(CLIENT *Client, REQUEST *Req)
 407 {
 408         CLIENT *from;
 409         int class;
 410         char class_c;
 411
 412         assert(Client != NULL);
 413         assert(Req != NULL);
 414
 415         /* Bad number of parameters? */
 416         if (Req->argc != 1 && Req->argc != 3)
 417                 return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 418                                           Client_ID(Client), Req->command);
 419
 420         from = Op_Check(Client, Req);
 421         if (!from)
 422                 return Op_NoPrivileges(Client, Req);
 423
 424         switch(Req->command[0]) {
 425                 case 'g':
 426                 case 'G':
 427                         class = CLASS_GLINE; class_c = 'G';
 428                         break;
 429                 case 'k':
 430                 case 'K':
 431                         class = CLASS_KLINE; class_c = 'K';
 432                         break;
 433                 default:
 434                         Log(LOG_CRIT,
 435                             "IRC_xLINE() called for unknown line: %c!? Ignored.",
 436                             Req->command[0]);
 437                         return CONNECTED;
 438         }
 439
 440         if (Req->argc == 1) {
 441                 /* Delete mask from list */
 442                 Class_DeleteMask(class, Req->argv[0]);
 443                 Log(LOG_NOTICE|LOG_snotice,
 444                     "\"%s\" deleted \"%s\" from %c-Line list.",
 445                     Client_Mask(from), Req->argv[0], class_c);
 446                 if (class == CLASS_GLINE) {
 447                         /* Inform other servers */
 448                         IRC_WriteStrServersPrefix(Client, from, "%s %s",
 449                                                   Req->command, Req->argv[0]);
 450
 451                 }
 452         } else {
 453                 /* Add new mask to list */
 454                 if (Class_AddMask(class, Req->argv[0],
 455                                   time(NULL) + atol(Req->argv[1]),
 456                                   Req->argv[2])) {
 457                         Log(LOG_NOTICE|LOG_snotice,
 458                             "\"%s\" added \"%s\" to %c-Line list: \"%s\" (%ld seconds).",
 459                             Client_Mask(from), Req->argv[0], class_c,
 460                             Req->argv[2], atol(Req->argv[1]));
 461                         if (class == CLASS_GLINE) {
 462                                 /* Inform other servers */
 463                                 IRC_WriteStrServersPrefix(Client, from,
 464                                                 "%s %s %s :%s", Req->command,
 465                                                 Req->argv[0], Req->argv[1],
 466                                                 Req->argv[2]);
 467                         }
 468                 }
 469         }
 470
 471         return CONNECTED;
 472 }
 473
 474 /* -eof- */