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 "irc-write.h"
  31 #include "log.h"
  32 #include "match.h"
  33 #include "messages.h"
  34 #include "parse.h"
  35 #include "op.h"
  36
  37 #include <exp.h>
  38 #include "irc-oper.h"
  39
  40 /**
  41  * Handle invalid received OPER command.
  42  * Log OPER attempt and send error message to client.
  43  */
  44 static bool
  45 Bad_OperPass(CLIENT *Client, char *errtoken, char *errmsg)
  46 {
  47         Log(LOG_WARNING, "Got invalid OPER from \"%s\": \"%s\" -- %s",
  48             Client_Mask(Client), errtoken, errmsg);
  49         IRC_SetPenalty(Client, 3);
  50         return IRC_WriteStrClient(Client, ERR_PASSWDMISMATCH_MSG,
  51                                   Client_ID(Client));
  52 } /* Bad_OperPass */
  53
  54 /**
  55  * Handler for the IRC "OPER" command.
  56  *
  57  * See RFC 2812, 3.1.4 "Oper message".
  58  *
  59  * @param Client The client from which this command has been received.
  60  * @param Req Request structure with prefix and all parameters.
  61  * @return CONNECTED or DISCONNECTED.
  62  */
  63 GLOBAL bool
  64 IRC_OPER( CLIENT *Client, REQUEST *Req )
  65 {
  66         struct Conf_Oper *op;
  67         size_t len, i;
  68
  69         assert( Client != NULL );
  70         assert( Req != NULL );
  71
  72         if (Req->argc != 2)
  73                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
  74                                           Client_ID(Client), Req->command);
  75
  76         len = array_length(&Conf_Opers, sizeof(*op));
  77         op = array_start(&Conf_Opers);
  78         for (i = 0; i < len && strcmp(op[i].name, Req->argv[0]); i++)
  79                 ;
  80         if (i >= len)
  81                 return Bad_OperPass(Client, Req->argv[0], "not configured");
  82
  83         if (strcmp(op[i].pwd, Req->argv[1]) != 0)
  84                 return Bad_OperPass(Client, op[i].name, "bad password");
  85
  86         if (op[i].mask && (!Match(op[i].mask, Client_Mask(Client))))
  87                 return Bad_OperPass(Client, op[i].mask, "hostmask check failed");
  88
  89         if (!Client_HasMode(Client, 'o')) {
  90                 Client_ModeAdd(Client, 'o');
  91                 if (!IRC_WriteStrClient(Client, "MODE %s :+o",
  92                                         Client_ID(Client)))
  93                         return DISCONNECTED;
  94                 IRC_WriteStrServersPrefix(NULL, Client, "MODE %s :+o",
  95                                           Client_ID(Client));
  96         }
  97
  98         if (!Client_OperByMe(Client))
  99                 Log(LOG_NOTICE|LOG_snotice,
 100                     "Got valid OPER from \"%s\", user is an IRC operator now.",
 101                     Client_Mask(Client));
 102
 103         Client_SetOperByMe(Client, true);
 104         return IRC_WriteStrClient(Client, RPL_YOUREOPER_MSG, Client_ID(Client));
 105 } /* IRC_OPER */
 106
 107 /**
 108  * Handler for the IRC "DIE" command.
 109  *
 110  * See RFC 2812, 4.3 "Die message".
 111  *
 112  * @param Client The client from which this command has been received.
 113  * @param Req Request structure with prefix and all parameters.
 114  * @return CONNECTED or DISCONNECTED.
 115  */
 116 GLOBAL bool
 117 IRC_DIE(CLIENT * Client, REQUEST * Req)
 118 {
 119         /* Shut down server */
 120
 121         CONN_ID c;
 122         CLIENT *cl;
 123
 124         assert(Client != NULL);
 125         assert(Req != NULL);
 126
 127         if (!Op_Check(Client, Req))
 128                 return Op_NoPrivileges(Client, Req);
 129
 130         /* Bad number of parameters? */
 131 #ifdef STRICT_RFC
 132         if (Req->argc != 0)
 133 #else
 134         if (Req->argc > 1)
 135 #endif
 136                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 137                                           Client_ID(Client), Req->command);
 138
 139         /* Is a message given? */
 140         if (Req->argc > 0) {
 141                 c = Conn_First();
 142                 while (c != NONE) {
 143                         cl = Conn_GetClient(c);
 144                         if (Client_Type(cl) == CLIENT_USER)
 145                                 IRC_WriteStrClient(cl, "NOTICE %s :%s",
 146                                                 Client_ID(cl), Req->argv[0]);
 147                         c = Conn_Next(c);
 148                 }
 149         }
 150
 151         Log(LOG_NOTICE | LOG_snotice, "Got DIE command from \"%s\" ...",
 152             Client_Mask(Client));
 153         NGIRCd_SignalQuit = true;
 154
 155         return CONNECTED;
 156 } /* IRC_DIE */
 157
 158 /**
 159  * Handler for the IRC "REHASH" command.
 160  *
 161  * See RFC 2812, 4.2 "Rehash message".
 162  *
 163  * @param Client The client from which this command has been received.
 164  * @param Req Request structure with prefix and all parameters.
 165  * @return CONNECTED or DISCONNECTED.
 166  */
 167 GLOBAL bool
 168 IRC_REHASH( CLIENT *Client, REQUEST *Req )
 169 {
 170         /* Reload configuration file */
 171
 172         assert( Client != NULL );
 173         assert( Req != NULL );
 174
 175         if (!Op_Check(Client, Req))
 176                 return Op_NoPrivileges(Client, Req);
 177
 178         /* Bad number of parameters? */
 179         if (Req->argc != 0)
 180                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 181                                           Client_ID(Client), Req->command );
 182
 183         Log(LOG_NOTICE|LOG_snotice, "Got REHASH command from \"%s\" ...",
 184             Client_Mask(Client));
 185         raise(SIGHUP);
 186
 187         return CONNECTED;
 188 } /* IRC_REHASH */
 189
 190 /**
 191  * Handler for the IRC "RESTART" command.
 192  *
 193  * See RFC 2812, 4.4 "Restart message".
 194  *
 195  * @param Client The client from which this command has been received.
 196  * @param Req Request structure with prefix and all parameters.
 197  * @return CONNECTED or DISCONNECTED.
 198  */
 199 GLOBAL bool
 200 IRC_RESTART( CLIENT *Client, REQUEST *Req )
 201 {
 202         /* Restart IRC server (fork a new process) */
 203
 204         assert( Client != NULL );
 205         assert( Req != NULL );
 206
 207         if (!Op_Check(Client, Req))
 208                 return Op_NoPrivileges(Client, Req);
 209
 210         /* Bad number of parameters? */
 211         if (Req->argc != 0)
 212                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 213                                           Client_ID(Client), Req->command);
 214
 215         Log(LOG_NOTICE|LOG_snotice, "Got RESTART command from \"%s\" ...",
 216             Client_Mask(Client));
 217         NGIRCd_SignalRestart = true;
 218
 219         return CONNECTED;
 220 } /* IRC_RESTART */
 221
 222 /**
 223  * Handler for the IRC "CONNECT" command.
 224  *
 225  * See RFC 2812, 3.4.7 "Connect message".
 226  *
 227  * @param Client The client from which this command has been received.
 228  * @param Req Request structure with prefix and all parameters.
 229  * @return CONNECTED or DISCONNECTED.
 230  */
 231 GLOBAL bool
 232 IRC_CONNECT(CLIENT * Client, REQUEST * Req)
 233 {
 234         CLIENT *from, *target;
 235
 236         assert(Client != NULL);
 237         assert(Req != NULL);
 238
 239         if (Client_Type(Client) != CLIENT_SERVER
 240             && !Client_HasMode(Client, 'o'))
 241                 return Op_NoPrivileges(Client, Req);
 242
 243         /* Bad number of parameters? */
 244         if (Req->argc != 1 && Req->argc != 2 && Req->argc != 3 &&
 245             Req->argc != 5 && Req->argc != 6)
 246                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 247                                           Client_ID(Client), Req->command);
 248
 249         /* Invalid port number? */
 250         if ((Req->argc > 1) && atoi(Req->argv[1]) < 1)
 251                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 252                                           Client_ID(Client), Req->command);
 253
 254         from = Client;
 255         target = Client_ThisServer();
 256
 257         if (Req->argc == 3 || Req->argc == 6) {
 258                 /* This CONNECT has a target parameter */
 259                 if (Client_Type(Client) == CLIENT_SERVER && Req->prefix)
 260                         from = Client_Search(Req->prefix);
 261                 if (! from)
 262                         return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 263                                         Client_ID(Client), Req->prefix);
 264
 265                 target = (Req->argc == 3) ? Client_Search(Req->argv[2])
 266                                           : Client_Search(Req->argv[5]);
 267                 if (! target || Client_Type(target) != CLIENT_SERVER)
 268                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 269                                         Client_ID(from), Req->argv[0]);
 270         }
 271
 272         if (target != Client_ThisServer()) {
 273                 /* Forward CONNECT command ... */
 274                 if (Req->argc == 3)
 275                         IRC_WriteStrClientPrefix(target, from,
 276                                  "CONNECT %s %s :%s", Req->argv[0],
 277                                  Req->argv[1], Req->argv[2]);
 278                 else
 279                         IRC_WriteStrClientPrefix(target, from,
 280                                 "CONNECT %s %s %s %s %s :%s", Req->argv[0],
 281                                 Req->argv[1], Req->argv[2], Req->argv[3],
 282                                 Req->argv[4], Req->argv[5]);
 283                 return CONNECTED;
 284         }
 285
 286         if (!Op_Check(from, Req))
 287                 return Op_NoPrivileges(Client, Req);
 288
 289         switch (Req->argc) {
 290         case 1:
 291                 if (!Conf_EnablePassiveServer(Req->argv[0]))
 292                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 293                                                   Client_ID(from),
 294                                                   Req->argv[0]);
 295                 break;
 296         case 2:
 297         case 3:
 298                 /* Connect configured server */
 299                 if (!Conf_EnableServer
 300                     (Req->argv[0], (UINT16) atoi(Req->argv[1])))
 301                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 302                                                   Client_ID(from),
 303                                                   Req->argv[0]);
 304                 break;
 305         default:
 306                 /* Add server */
 307                 if (!Conf_AddServer
 308                     (Req->argv[0], (UINT16) atoi(Req->argv[1]), Req->argv[2],
 309                      Req->argv[3], Req->argv[4]))
 310                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 311                                                   Client_ID(from),
 312                                                   Req->argv[0]);
 313         }
 314
 315         Log(LOG_NOTICE | LOG_snotice,
 316             "Got CONNECT command from \"%s\" for \"%s\".", Client_Mask(from),
 317             Req->argv[0]);
 318         IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
 319                         "Received CONNECT %s from %s",
 320                         Req->argv[0], Client_ID(from));
 321
 322         return CONNECTED;
 323 } /* IRC_CONNECT */
 324
 325 /**
 326  * Handler for the IRC "DISCONNECT" command.
 327  *
 328  * This command is not specified in the IRC RFCs, it is an extension
 329  * of ngIRCd: it shuts down and disables a configured server connection.
 330  *
 331  * @param Client The client from which this command has been received.
 332  * @param Req Request structure with prefix and all parameters.
 333  * @return CONNECTED or DISCONNECTED.
 334  */
 335 GLOBAL bool
 336 IRC_DISCONNECT(CLIENT * Client, REQUEST * Req)
 337 {
 338         CONN_ID my_conn;
 339
 340         assert(Client != NULL);
 341         assert(Req != NULL);
 342
 343         if (!Op_Check(Client, Req))
 344                 return Op_NoPrivileges(Client, Req);
 345
 346         /* Bad number of parameters? */
 347         if (Req->argc != 1)
 348                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 349                                           Client_ID(Client), Req->command);
 350
 351         IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
 352                         "Received DISCONNECT %s from %s",
 353                         Req->argv[0], Client_ID(Client));
 354
 355         Log(LOG_NOTICE | LOG_snotice,
 356             "Got DISCONNECT command from \"%s\" for \"%s\".",
 357             Client_Mask(Client), Req->argv[0]);
 358
 359         /* Save ID of this connection */
 360         my_conn = Client_Conn(Client);
 361
 362         /* Disconnect configured server */
 363         if (!Conf_DisableServer(Req->argv[0]))
 364                 return IRC_WriteStrClient(Client, ERR_NOSUCHSERVER_MSG,
 365                                           Client_ID(Client), Req->argv[0]);
 366
 367         /* Are we still connected or were we killed, too? */
 368         if (Conn_GetClient(my_conn))
 369                 return CONNECTED;
 370         else
 371                 return DISCONNECTED;
 372 } /* IRC_DISCONNECT */
 373
 374 /**
 375  * Handler for the IRC "WALLOPS" command.
 376  *
 377  * See RFC 2812, 4.7 "Operwall message".
 378  *
 379  * @param Client The client from which this command has been received.
 380  * @param Req Request structure with prefix and all parameters.
 381  * @return CONNECTED or DISCONNECTED.
 382  */
 383 GLOBAL bool
 384 IRC_WALLOPS( CLIENT *Client, REQUEST *Req )
 385 {
 386         CLIENT *from;
 387
 388         assert( Client != NULL );
 389         assert( Req != NULL );
 390
 391         if (Req->argc != 1)
 392                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 393                                           Client_ID(Client), Req->command);
 394
 395         switch (Client_Type(Client)) {
 396         case CLIENT_USER:
 397                 if (!Client_OperByMe(Client))
 398                         return IRC_WriteStrClient(Client, ERR_NOPRIVILEGES_MSG,
 399                                                   Client_ID(Client));
 400                 from = Client;
 401                 break;
 402         case CLIENT_SERVER:
 403                 from = Client_Search(Req->prefix);
 404                 break;
 405         default:
 406                 return CONNECTED;
 407         }
 408
 409         if (!from)
 410                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 411                                           Client_ID(Client), Req->prefix);
 412
 413         IRC_SendWallops(Client, from, "%s", Req->argv[0]);
 414         return CONNECTED;
 415 } /* IRC_WALLOPS */
 416
 417
 418 /* -eof- */