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 "parse.h"
  32 #include "irc.h"
  33 #include "irc-macros.h"
  34 #include "irc-write.h"
  35 #include "lists.h"
  36 #include "log.h"
  37 #include "match.h"
  38 #include "messages.h"
  39 #include "op.h"
  40
  41 #include <exp.h>
  42 #include "irc-oper.h"
  43
  44 /**
  45  * Handle invalid received OPER command.
  46  * Log OPER attempt and send error message to client.
  47  */
  48 static bool
  49 Bad_OperPass(CLIENT *Client, char *errtoken, char *errmsg)
  50 {
  51         Log(LOG_WARNING, "Got invalid OPER from \"%s\": \"%s\" -- %s!",
  52             Client_Mask(Client), errtoken, errmsg);
  53         /* Increase penalty to slow down possible brute force attacks */
  54         IRC_SetPenalty(Client, 10);
  55         return IRC_WriteStrClient(Client, ERR_PASSWDMISMATCH_MSG,
  56                                   Client_ID(Client));
  57 } /* Bad_OperPass */
  58
  59 /**
  60  * Handler for the IRC "OPER" command.
  61  *
  62  * @param Client The client from which this command has been received.
  63  * @param Req Request structure with prefix and all parameters.
  64  * @return CONNECTED or DISCONNECTED.
  65  */
  66 GLOBAL bool
  67 IRC_OPER( CLIENT *Client, REQUEST *Req )
  68 {
  69         struct Conf_Oper *op;
  70         size_t len, i;
  71
  72         assert( Client != NULL );
  73         assert( Req != NULL );
  74
  75         len = array_length(&Conf_Opers, sizeof(*op));
  76         op = array_start(&Conf_Opers);
  77         for (i = 0; i < len && strcmp(op[i].name, Req->argv[0]); i++)
  78                 ;
  79         if (i >= len)
  80                 return Bad_OperPass(Client, Req->argv[0], "not configured");
  81
  82         if (strcmp(op[i].pwd, Req->argv[1]) != 0)
  83                 return Bad_OperPass(Client, op[i].name, "bad password");
  84
  85         if (op[i].mask && (!Match(op[i].mask, Client_Mask(Client))))
  86                 return Bad_OperPass(Client, op[i].mask, "hostmask check failed");
  87
  88         if (!Client_HasMode(Client, 'o')) {
  89                 Client_ModeAdd(Client, 'o');
  90                 if (!IRC_WriteStrClient(Client, "MODE %s :+o",
  91                                         Client_ID(Client)))
  92                         return DISCONNECTED;
  93                 IRC_WriteStrServersPrefix(NULL, Client, "MODE %s :+o",
  94                                           Client_ID(Client));
  95         }
  96
  97         Log(LOG_NOTICE|LOG_snotice,
  98             "Got valid OPER for \"%s\" from \"%s\", user is an IRC operator now.",
  99             Req->argv[0], Client_Mask(Client));
 100
 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         if (!Op_Check(Client, Req))
 123                 return Op_NoPrivileges(Client, Req);
 124
 125         /* Is a message given? */
 126         if (Req->argc > 0) {
 127                 c = Conn_First();
 128                 while (c != NONE) {
 129                         cl = Conn_GetClient(c);
 130                         if (Client_Type(cl) == CLIENT_USER)
 131                                 IRC_WriteStrClient(cl, "NOTICE %s :%s",
 132                                                 Client_ID(cl), Req->argv[0]);
 133                         c = Conn_Next(c);
 134                 }
 135         }
 136
 137         Log(LOG_NOTICE | LOG_snotice, "Got DIE command from \"%s\" ...",
 138             Client_Mask(Client));
 139         NGIRCd_SignalQuit = true;
 140
 141         return CONNECTED;
 142 } /* IRC_DIE */
 143
 144 /**
 145  * Handler for the IRC "REHASH" command.
 146  *
 147  * @param Client The client from which this command has been received.
 148  * @param Req Request structure with prefix and all parameters.
 149  * @return CONNECTED or DISCONNECTED.
 150  */
 151 GLOBAL bool
 152 IRC_REHASH( CLIENT *Client, REQUEST *Req )
 153 {
 154         /* Reload configuration file */
 155
 156         assert( Client != NULL );
 157         assert( Req != NULL );
 158
 159         if (!Op_Check(Client, Req))
 160                 return Op_NoPrivileges(Client, Req);
 161
 162         Log(LOG_NOTICE|LOG_snotice, "Got REHASH command from \"%s\" ...",
 163             Client_Mask(Client));
 164         IRC_WriteStrClient(Client, RPL_REHASHING_MSG, Client_ID(Client));
 165
 166         raise(SIGHUP);
 167
 168         return CONNECTED;
 169 } /* IRC_REHASH */
 170
 171 /**
 172  * Handler for the IRC "RESTART" command.
 173  *
 174  * @param Client The client from which this command has been received.
 175  * @param Req Request structure with prefix and all parameters.
 176  * @return CONNECTED or DISCONNECTED.
 177  */
 178 GLOBAL bool
 179 IRC_RESTART( CLIENT *Client, REQUEST *Req )
 180 {
 181         /* Restart IRC server (fork a new process) */
 182
 183         assert( Client != NULL );
 184         assert( Req != NULL );
 185
 186         if (!Op_Check(Client, Req))
 187                 return Op_NoPrivileges(Client, Req);
 188
 189         Log(LOG_NOTICE|LOG_snotice, "Got RESTART command from \"%s\" ...",
 190             Client_Mask(Client));
 191         NGIRCd_SignalRestart = true;
 192
 193         return CONNECTED;
 194 } /* IRC_RESTART */
 195
 196 /**
 197  * Handler for the IRC "CONNECT" command.
 198  *
 199  * @param Client The client from which this command has been received.
 200  * @param Req Request structure with prefix and all parameters.
 201  * @return CONNECTED or DISCONNECTED.
 202  */
 203 GLOBAL bool
 204 IRC_CONNECT(CLIENT * Client, REQUEST * Req)
 205 {
 206         CLIENT *from, *target;
 207
 208         assert(Client != NULL);
 209         assert(Req != NULL);
 210
 211         /* Bad number of parameters? */
 212         if (Req->argc != 1 && Req->argc != 2 && Req->argc != 3 &&
 213             Req->argc != 5 && Req->argc != 6)
 214                 return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 215                                           Client_ID(Client), Req->command);
 216
 217         /* Invalid port number? */
 218         if ((Req->argc > 1) && atoi(Req->argv[1]) < 1)
 219                 return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 220                                           Client_ID(Client), Req->command);
 221
 222         if (Client_Type(Client) != CLIENT_SERVER
 223             && !Client_HasMode(Client, 'o'))
 224                 return Op_NoPrivileges(Client, Req);
 225
 226         from = Client;
 227         target = Client_ThisServer();
 228
 229         if (Req->argc == 3 || Req->argc == 6) {
 230                 /* This CONNECT has a target parameter */
 231                 if (Client_Type(Client) == CLIENT_SERVER && Req->prefix)
 232                         from = Client_Search(Req->prefix);
 233                 if (! from)
 234                         return IRC_WriteErrClient(Client, ERR_NOSUCHNICK_MSG,
 235                                                   Client_ID(Client), Req->prefix);
 236
 237                 target = (Req->argc == 3) ? Client_Search(Req->argv[2])
 238                                           : Client_Search(Req->argv[5]);
 239                 if (! target || Client_Type(target) != CLIENT_SERVER)
 240                         return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
 241                                                   Client_ID(from), Req->argv[0]);
 242         }
 243
 244         if (target != Client_ThisServer()) {
 245                 /* Forward CONNECT command ... */
 246                 if (Req->argc == 3)
 247                         IRC_WriteStrClientPrefix(target, from,
 248                                  "CONNECT %s %s :%s", Req->argv[0],
 249                                  Req->argv[1], Req->argv[2]);
 250                 else
 251                         IRC_WriteStrClientPrefix(target, from,
 252                                 "CONNECT %s %s %s %s %s :%s", Req->argv[0],
 253                                 Req->argv[1], Req->argv[2], Req->argv[3],
 254                                 Req->argv[4], Req->argv[5]);
 255                 return CONNECTED;
 256         }
 257
 258         if (!Op_Check(from, Req))
 259                 return Op_NoPrivileges(Client, Req);
 260
 261         switch (Req->argc) {
 262         case 1:
 263                 if (!Conf_EnablePassiveServer(Req->argv[0]))
 264                         return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
 265                                                   Client_ID(from),
 266                                                   Req->argv[0]);
 267                 break;
 268         case 2:
 269         case 3:
 270                 /* Connect configured server */
 271                 if (!Conf_EnableServer
 272                     (Req->argv[0], (UINT16) atoi(Req->argv[1])))
 273                         return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
 274                                                   Client_ID(from),
 275                                                   Req->argv[0]);
 276                 break;
 277         default:
 278                 /* Add server */
 279                 if (!Conf_AddServer
 280                     (Req->argv[0], (UINT16) atoi(Req->argv[1]), Req->argv[2],
 281                      Req->argv[3], Req->argv[4]))
 282                         return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
 283                                                   Client_ID(from),
 284                                                   Req->argv[0]);
 285         }
 286
 287         Log(LOG_NOTICE | LOG_snotice,
 288             "Got CONNECT command from \"%s\" for \"%s\".", Client_Mask(from),
 289             Req->argv[0]);
 290         IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
 291                         "Received CONNECT %s from %s",
 292                         Req->argv[0], Client_ID(from));
 293
 294         return CONNECTED;
 295 } /* IRC_CONNECT */
 296
 297 /**
 298  * Handler for the IRC "DISCONNECT" command.
 299  *
 300  * This command is not specified in the IRC RFCs, it is an extension
 301  * of ngIRCd: it shuts down and disables a configured server connection.
 302  *
 303  * @param Client The client from which this command has been received.
 304  * @param Req Request structure with prefix and all parameters.
 305  * @return CONNECTED or DISCONNECTED.
 306  */
 307 GLOBAL bool
 308 IRC_DISCONNECT(CLIENT * Client, REQUEST * Req)
 309 {
 310         CONN_ID my_conn;
 311
 312         assert(Client != NULL);
 313         assert(Req != NULL);
 314
 315         if (!Op_Check(Client, Req))
 316                 return Op_NoPrivileges(Client, Req);
 317
 318         IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
 319                         "Received DISCONNECT %s from %s",
 320                         Req->argv[0], Client_ID(Client));
 321
 322         Log(LOG_NOTICE | LOG_snotice,
 323             "Got DISCONNECT command from \"%s\" for \"%s\".",
 324             Client_Mask(Client), Req->argv[0]);
 325
 326         /* Save ID of this connection */
 327         my_conn = Client_Conn(Client);
 328
 329         /* Disconnect configured server */
 330         if (!Conf_DisableServer(Req->argv[0]))
 331                 return IRC_WriteErrClient(Client, ERR_NOSUCHSERVER_MSG,
 332                                           Client_ID(Client), Req->argv[0]);
 333
 334         /* Are we still connected or were we killed, too? */
 335         if (Conn_GetClient(my_conn))
 336                 return CONNECTED;
 337         else
 338                 return DISCONNECTED;
 339 } /* IRC_DISCONNECT */
 340
 341 /**
 342  * Handler for the IRC "WALLOPS" command.
 343  *
 344  * @param Client The client from which this command has been received.
 345  * @param Req Request structure with prefix and all parameters.
 346  * @return CONNECTED or DISCONNECTED.
 347  */
 348 GLOBAL bool
 349 IRC_WALLOPS( CLIENT *Client, REQUEST *Req )
 350 {
 351         CLIENT *from;
 352
 353         assert( Client != NULL );
 354         assert( Req != NULL );
 355
 356         switch (Client_Type(Client)) {
 357         case CLIENT_USER:
 358                 if (!Op_Check(Client, Req))
 359                         return Op_NoPrivileges(Client, Req);
 360                 from = Client;
 361                 break;
 362         case CLIENT_SERVER:
 363                 from = Client_Search(Req->prefix);
 364                 break;
 365         default:
 366                 return CONNECTED;
 367         }
 368
 369         if (!from)
 370                 return IRC_WriteErrClient(Client, ERR_NOSUCHNICK_MSG,
 371                                           Client_ID(Client), Req->prefix);
 372
 373         IRC_SendWallops(Client, from, "%s", Req->argv[0]);
 374         return CONNECTED;
 375 } /* IRC_WALLOPS */
 376
 377 /**
 378  * Handle <?>LINE commands (GLINE, KLINE).
 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_xLINE(CLIENT *Client, REQUEST *Req)
 386 {
 387         CLIENT *from, *c, *c_next;
 388         char reason[COMMAND_LEN], class_c;
 389         struct list_head *list;
 390         time_t timeout;
 391         int class;
 392
 393         assert(Client != NULL);
 394         assert(Req != NULL);
 395
 396         /* Bad number of parameters? */
 397         if (Req->argc != 1 && Req->argc != 3)
 398                 return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 399                                           Client_ID(Client), Req->command);
 400
 401         from = Op_Check(Client, Req);
 402         if (!from)
 403                 return Op_NoPrivileges(Client, Req);
 404
 405         switch(Req->command[0]) {
 406                 case 'g':
 407                 case 'G':
 408                         class = CLASS_GLINE; class_c = 'G';
 409                         break;
 410                 case 'k':
 411                 case 'K':
 412                         class = CLASS_KLINE; class_c = 'K';
 413                         break;
 414                 default:
 415                         Log(LOG_CRIT,
 416                             "IRC_xLINE() called for unknown line: %c!? Ignored.",
 417                             Req->command[0]);
 418                         return CONNECTED;
 419         }
 420
 421         if (Req->argc == 1) {
 422                 /* Delete mask from list */
 423                 Class_DeleteMask(class, Req->argv[0]);
 424                 Log(LOG_NOTICE|LOG_snotice,
 425                     "\"%s\" deleted \"%s\" from %c-Line list.",
 426                     Client_Mask(from), Req->argv[0], class_c);
 427                 if (class == CLASS_GLINE) {
 428                         /* Inform other servers */
 429                         IRC_WriteStrServersPrefix(Client, from, "%s %s",
 430                                                   Req->command, Req->argv[0]);
 431
 432                 }
 433         } else {
 434                 /* Add new mask to list */
 435                 timeout = atol(Req->argv[1]);
 436                 if (timeout > 0)
 437                         timeout += time(NULL);
 438                 if (Class_AddMask(class, Req->argv[0],
 439                                   timeout,
 440                                   Req->argv[2])) {
 441                         Log(LOG_NOTICE|LOG_snotice,
 442                             "\"%s\" added \"%s\" to %c-Line list: \"%s\" (%ld seconds).",
 443                             Client_Mask(from), Req->argv[0], class_c,
 444                             Req->argv[2], atol(Req->argv[1]));
 445                         if (class == CLASS_GLINE) {
 446                                 /* Inform other servers */
 447                                 IRC_WriteStrServersPrefix(Client, from,
 448                                                 "%s %s %s :%s", Req->command,
 449                                                 Req->argv[0], Req->argv[1],
 450                                                 Req->argv[2]);
 451                         }
 452
 453                         /* Check currently connected clients */
 454                         snprintf(reason, sizeof(reason), "%c-Line by \"%s\": \"%s\"",
 455                                  class_c, Client_ID(from), Req->argv[2]);
 456                         list = Class_GetList(class);
 457                         c = Client_First();
 458                         while (c) {
 459                                 c_next = Client_Next(c);
 460                                 if ((class == CLASS_GLINE || Client_Conn(c) > NONE)
 461                                     && Lists_Check(list, c))
 462                                         IRC_KillClient(Client, NULL,
 463                                                        Client_ID(c), reason);
 464                                 c = c_next;
 465                         }
 466                 }
 467         }
 468
 469         return CONNECTED;
 470 }
 471
 472 /* -eof- */