src/ngircd/irc-oper.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2015 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-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 "irc-oper.h"
  42
  43 /**
  44  * Handle invalid received OPER command.
  45  * Log OPER attempt and send error message to client.
  46  */
  47 static bool
  48 Bad_OperPass(CLIENT *Client, char *errtoken, char *errmsg)
  49 {
  50         Log(LOG_WARNING, "Got invalid OPER from \"%s\": \"%s\" -- %s!",
  51             Client_Mask(Client), errtoken, errmsg);
  52         /* Increase penalty to slow down possible brute force attacks */
  53         IRC_SetPenalty(Client, 10);
  54         return IRC_WriteStrClient(Client, ERR_PASSWDMISMATCH_MSG,
  55                                   Client_ID(Client));
  56 } /* Bad_OperPass */
  57
  58 /**
  59  * Handler for the IRC "OPER" command.
  60  *
  61  * @param Client The client from which this command has been received.
  62  * @param Req Request structure with prefix and all parameters.
  63  * @return CONNECTED or DISCONNECTED.
  64  */
  65 GLOBAL bool
  66 IRC_OPER( CLIENT *Client, REQUEST *Req )
  67 {
  68         struct Conf_Oper *op;
  69         size_t len, i;
  70
  71         assert( Client != NULL );
  72         assert( Req != NULL );
  73
  74         len = array_length(&Conf_Opers, sizeof(*op));
  75         op = array_start(&Conf_Opers);
  76         for (i = 0; i < len && strcmp(op[i].name, Req->argv[0]); i++)
  77                 ;
  78         if (i >= len)
  79                 return Bad_OperPass(Client, Req->argv[0], "not configured");
  80
  81         if (strcmp(op[i].pwd, Req->argv[1]) != 0)
  82                 return Bad_OperPass(Client, op[i].name, "bad password");
  83
  84         if (op[i].mask && (!Match(op[i].mask, Client_Mask(Client))))
  85                 return Bad_OperPass(Client, op[i].mask, "hostmask check failed");
  86
  87         if (!Client_HasMode(Client, 'o')) {
  88                 Client_ModeAdd(Client, 'o');
  89                 if (!IRC_WriteStrClient(Client, "MODE %s :+o",
  90                                         Client_ID(Client)))
  91                         return DISCONNECTED;
  92                 IRC_WriteStrServersPrefix(NULL, Client, "MODE %s :+o",
  93                                           Client_ID(Client));
  94         }
  95
  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         return IRC_WriteStrClient(Client, RPL_YOUREOPER_MSG, Client_ID(Client));
 101 } /* IRC_OPER */
 102
 103 /**
 104  * Handler for the IRC "DIE" command.
 105  *
 106  * @param Client The client from which this command has been received.
 107  * @param Req Request structure with prefix and all parameters.
 108  * @return CONNECTED or DISCONNECTED.
 109  */
 110 GLOBAL bool
 111 IRC_DIE(CLIENT * Client, REQUEST * Req)
 112 {
 113         /* Shut down server */
 114
 115         CONN_ID c;
 116         CLIENT *cl;
 117
 118         assert(Client != NULL);
 119         assert(Req != NULL);
 120
 121         if (!Op_Check(Client, Req))
 122                 return Op_NoPrivileges(Client, Req);
 123
 124         /* Is a message given? */
 125         if (Req->argc > 0) {
 126                 c = Conn_First();
 127                 while (c != NONE) {
 128                         cl = Conn_GetClient(c);
 129                         if (Client_Type(cl) == CLIENT_USER)
 130                                 IRC_WriteStrClient(cl, "NOTICE %s :%s",
 131                                                 Client_ID(cl), Req->argv[0]);
 132                         c = Conn_Next(c);
 133                 }
 134         }
 135
 136         Log(LOG_NOTICE | LOG_snotice, "Got DIE command from \"%s\" ...",
 137             Client_Mask(Client));
 138         NGIRCd_SignalQuit = true;
 139
 140         return CONNECTED;
 141 } /* IRC_DIE */
 142
 143 /**
 144  * Handler for the IRC "REHASH" command.
 145  *
 146  * @param Client The client from which this command has been received.
 147  * @param Req Request structure with prefix and all parameters.
 148  * @return CONNECTED or DISCONNECTED.
 149  */
 150 GLOBAL bool
 151 IRC_REHASH( CLIENT *Client, REQUEST *Req )
 152 {
 153         /* Reload configuration file */
 154
 155         assert( Client != NULL );
 156         assert( Req != NULL );
 157
 158         if (!Op_Check(Client, Req))
 159                 return Op_NoPrivileges(Client, Req);
 160
 161         Log(LOG_NOTICE|LOG_snotice, "Got REHASH command from \"%s\" ...",
 162             Client_Mask(Client));
 163         IRC_WriteStrClient(Client, RPL_REHASHING_MSG, Client_ID(Client));
 164
 165         raise(SIGHUP);
 166
 167         return CONNECTED;
 168 } /* IRC_REHASH */
 169
 170 /**
 171  * Handler for the IRC "RESTART" command.
 172  *
 173  * @param Client The client from which this command has been received.
 174  * @param Req Request structure with prefix and all parameters.
 175  * @return CONNECTED or DISCONNECTED.
 176  */
 177 GLOBAL bool
 178 IRC_RESTART( CLIENT *Client, REQUEST *Req )
 179 {
 180         /* Restart IRC server (fork a new process) */
 181
 182         assert( Client != NULL );
 183         assert( Req != NULL );
 184
 185         if (!Op_Check(Client, Req))
 186                 return Op_NoPrivileges(Client, Req);
 187
 188         Log(LOG_NOTICE|LOG_snotice, "Got RESTART command from \"%s\" ...",
 189             Client_Mask(Client));
 190         NGIRCd_SignalRestart = true;
 191
 192         return CONNECTED;
 193 } /* IRC_RESTART */
 194
 195 /**
 196  * Handler for the IRC "CONNECT" command.
 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_CONNECT(CLIENT * Client, REQUEST * Req)
 204 {
 205         CLIENT *from, *target;
 206
 207         assert(Client != NULL);
 208         assert(Req != NULL);
 209
 210         /* Bad number of parameters? */
 211         if (Req->argc != 1 && Req->argc != 2 && Req->argc != 3 &&
 212             Req->argc != 5 && Req->argc != 6)
 213                 return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 214                                           Client_ID(Client), Req->command);
 215
 216         /* Invalid port number? */
 217         if ((Req->argc > 1) && atoi(Req->argv[1]) < 1)
 218                 return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 219                                           Client_ID(Client), Req->command);
 220
 221         if (Client_Type(Client) != CLIENT_SERVER
 222             && !Client_HasMode(Client, 'o'))
 223                 return Op_NoPrivileges(Client, Req);
 224
 225         from = Client;
 226         target = Client_ThisServer();
 227
 228         if (Req->argc == 3 || Req->argc == 6) {
 229                 /* This CONNECT has a target parameter */
 230                 if (Client_Type(Client) == CLIENT_SERVER && Req->prefix)
 231                         from = Client_Search(Req->prefix);
 232                 if (! from)
 233                         return IRC_WriteErrClient(Client, ERR_NOSUCHNICK_MSG,
 234                                                   Client_ID(Client), Req->prefix);
 235
 236                 target = (Req->argc == 3) ? Client_Search(Req->argv[2])
 237                                           : Client_Search(Req->argv[5]);
 238                 if (! target || Client_Type(target) != CLIENT_SERVER)
 239                         return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
 240                                                   Client_ID(from), Req->argv[0]);
 241         }
 242
 243         if (target != Client_ThisServer()) {
 244                 /* Forward CONNECT command ... */
 245                 if (Req->argc == 3)
 246                         IRC_WriteStrClientPrefix(target, from,
 247                                  "CONNECT %s %s :%s", Req->argv[0],
 248                                  Req->argv[1], Req->argv[2]);
 249                 else
 250                         IRC_WriteStrClientPrefix(target, from,
 251                                 "CONNECT %s %s %s %s %s :%s", Req->argv[0],
 252                                 Req->argv[1], Req->argv[2], Req->argv[3],
 253                                 Req->argv[4], Req->argv[5]);
 254                 return CONNECTED;
 255         }
 256
 257         if (!Op_Check(from, Req))
 258                 return Op_NoPrivileges(Client, Req);
 259
 260         switch (Req->argc) {
 261         case 1:
 262                 if (!Conf_EnablePassiveServer(Req->argv[0]))
 263                         return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
 264                                                   Client_ID(from),
 265                                                   Req->argv[0]);
 266                 break;
 267         case 2:
 268         case 3:
 269                 /* Connect configured server */
 270                 if (!Conf_EnableServer
 271                     (Req->argv[0], (UINT16) atoi(Req->argv[1])))
 272                         return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
 273                                                   Client_ID(from),
 274                                                   Req->argv[0]);
 275                 break;
 276         default:
 277                 /* Add server */
 278                 if (!Conf_AddServer
 279                     (Req->argv[0], (UINT16) atoi(Req->argv[1]), Req->argv[2],
 280                      Req->argv[3], Req->argv[4]))
 281                         return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
 282                                                   Client_ID(from),
 283                                                   Req->argv[0]);
 284         }
 285
 286         Log(LOG_NOTICE | LOG_snotice,
 287             "Got CONNECT command from \"%s\" for \"%s\".", Client_Mask(from),
 288             Req->argv[0]);
 289         IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
 290                         "Received CONNECT %s from %s",
 291                         Req->argv[0], Client_ID(from));
 292
 293         return CONNECTED;
 294 } /* IRC_CONNECT */
 295
 296 /**
 297  * Handler for the IRC "DISCONNECT" command.
 298  *
 299  * This command is not specified in the IRC RFCs, it is an extension
 300  * of ngIRCd: it shuts down and disables a configured server connection.
 301  *
 302  * @param Client The client from which this command has been received.
 303  * @param Req Request structure with prefix and all parameters.
 304  * @return CONNECTED or DISCONNECTED.
 305  */
 306 GLOBAL bool
 307 IRC_DISCONNECT(CLIENT * Client, REQUEST * Req)
 308 {
 309         CONN_ID my_conn;
 310
 311         assert(Client != NULL);
 312         assert(Req != NULL);
 313
 314         if (!Op_Check(Client, Req))
 315                 return Op_NoPrivileges(Client, Req);
 316
 317         IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
 318                         "Received DISCONNECT %s from %s",
 319                         Req->argv[0], Client_ID(Client));
 320
 321         Log(LOG_NOTICE | LOG_snotice,
 322             "Got DISCONNECT command from \"%s\" for \"%s\".",
 323             Client_Mask(Client), Req->argv[0]);
 324
 325         /* Save ID of this connection */
 326         my_conn = Client_Conn(Client);
 327
 328         /* Disconnect configured server */
 329         if (!Conf_DisableServer(Req->argv[0]))
 330                 return IRC_WriteErrClient(Client, ERR_NOSUCHSERVER_MSG,
 331                                           Client_ID(Client), Req->argv[0]);
 332
 333         /* Are we still connected or were we killed, too? */
 334         if (Conn_GetClient(my_conn))
 335                 return CONNECTED;
 336         else
 337                 return DISCONNECTED;
 338 } /* IRC_DISCONNECT */
 339
 340 /**
 341  * Handler for the IRC "WALLOPS" command.
 342  *
 343  * @param Client The client from which this command has been received.
 344  * @param Req Request structure with prefix and all parameters.
 345  * @return CONNECTED or DISCONNECTED.
 346  */
 347 GLOBAL bool
 348 IRC_WALLOPS( CLIENT *Client, REQUEST *Req )
 349 {
 350         CLIENT *from;
 351
 352         assert( Client != NULL );
 353         assert( Req != NULL );
 354
 355         switch (Client_Type(Client)) {
 356         case CLIENT_USER:
 357                 if (!Op_Check(Client, Req))
 358                         return Op_NoPrivileges(Client, Req);
 359                 from = Client;
 360                 break;
 361         case CLIENT_SERVER:
 362                 _IRC_REQUIRE_PREFIX_OR_RETURN_(Client, Req)
 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- */