src/ngircd/irc-oper.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2008 Alexander Barton (alex@barton.de)
   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  * IRC operator commands
  12  */
  13
  14
  15 #include "portab.h"
  16
  17 #include "imp.h"
  18 #include <assert.h>
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22
  23 #include "ngircd.h"
  24 #include "resolve.h"
  25 #include "conn-func.h"
  26 #include "conf.h"
  27 #include "client.h"
  28 #include "channel.h"
  29 #include "irc-write.h"
  30 #include "log.h"
  31 #include "match.h"
  32 #include "messages.h"
  33 #include "parse.h"
  34
  35 #include <exp.h>
  36 #include "irc-oper.h"
  37
  38
  39 /**
  40  * Handle invalid received OPER command.
  41  * Log OPER attempt and send error message to client.
  42  */
  43 static bool
  44 Bad_OperPass(CLIENT *Client, char *errtoken, char *errmsg)
  45 {
  46         Log(LOG_WARNING, "Got invalid OPER from \"%s\": \"%s\" -- %s",
  47             Client_Mask(Client), errtoken, errmsg);
  48         IRC_SetPenalty(Client, 3);
  49         return IRC_WriteStrClient(Client, ERR_PASSWDMISMATCH_MSG,
  50                                   Client_ID(Client));
  51 } /* Bad_OperPass */
  52
  53
  54 /**
  55  * Check that the client is an IRC operator allowed to administer this server.
  56  */
  57 static bool
  58 Check_Oper(CLIENT * Client, REQUEST * Req)
  59 {
  60         CLIENT *c;
  61
  62         assert(Client != NULL);
  63         assert(Req != NULL);
  64
  65         if (Client_Type(Client) == CLIENT_SERVER && Req->prefix)
  66                 c = Client_Search(Req->prefix);
  67         else
  68                 c = Client;
  69         if (!c)
  70                 return false;
  71         if (!Client_HasMode(c, 'o'))
  72                 return false;
  73         if (!Client_OperByMe(c) && !Conf_AllowRemoteOper)
  74                 return false;
  75         /* The client is an local IRC operator, or this server is configured
  76          * to trust remote operators. */
  77         return true;
  78 } /* CheckOper */
  79
  80
  81 /**
  82  * Return and log a "no privileges" message.
  83  */
  84 static bool
  85 No_Privileges(CLIENT * Client, REQUEST * Req)
  86 {
  87         CLIENT *from = NULL;
  88
  89         if (Req->prefix)
  90                 from = Client_Search(Req->prefix);
  91
  92         if (from) {
  93                 Log(LOG_NOTICE, "No privileges: client \"%s\" (%s), command \"%s\"",
  94                     Req->prefix, Client_Mask(Client), Req->command);
  95                 return IRC_WriteStrClient(from, ERR_NOPRIVILEGES_MSG,
  96                                           Client_ID(from));
  97         } else {
  98                 Log(LOG_NOTICE, "No privileges: client \"%s\", command \"%s\"",
  99                     Client_Mask(Client), Req->command);
 100                 return IRC_WriteStrClient(Client, ERR_NOPRIVILEGES_MSG,
 101                                           Client_ID(Client));
 102         }
 103 } /* PermissionDenied */
 104
 105
 106 GLOBAL bool
 107 IRC_OPER( CLIENT *Client, REQUEST *Req )
 108 {
 109         unsigned int i;
 110
 111         assert( Client != NULL );
 112         assert( Req != NULL );
 113
 114         if( Req->argc != 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 115
 116         for( i = 0; i < Conf_Oper_Count; i++)
 117         {
 118                 if( Conf_Oper[i].name[0] && Conf_Oper[i].pwd[0] && ( strcmp( Conf_Oper[i].name, Req->argv[0] ) == 0 )) break;
 119         }
 120         if( i >= Conf_Oper_Count )
 121                 return Bad_OperPass(Client, Req->argv[0], "not configured");
 122
 123         if( strcmp( Conf_Oper[i].pwd, Req->argv[1] ) != 0 )
 124                 return Bad_OperPass(Client, Conf_Oper[i].name, "bad password");
 125
 126         if( Conf_Oper[i].mask && (! Match( Conf_Oper[i].mask, Client_Mask( Client ) )))
 127                 return Bad_OperPass(Client, Conf_Oper[i].mask, "hostmask check failed" );
 128
 129         if( ! Client_HasMode( Client, 'o' ))
 130         {
 131                 Client_ModeAdd( Client, 'o' );
 132                 if( ! IRC_WriteStrClient( Client, "MODE %s :+o", Client_ID( Client ))) return DISCONNECTED;
 133                 IRC_WriteStrServersPrefix( NULL, Client, "MODE %s :+o", Client_ID( Client ));
 134         }
 135
 136         if( ! Client_OperByMe( Client )) Log( LOG_NOTICE|LOG_snotice, "Got valid OPER from \"%s\", user is an IRC operator now.", Client_Mask( Client ));
 137
 138         Client_SetOperByMe( Client, true);
 139         return IRC_WriteStrClient( Client, RPL_YOUREOPER_MSG, Client_ID( Client ));
 140 } /* IRC_OPER */
 141
 142
 143 GLOBAL bool
 144 IRC_DIE(CLIENT * Client, REQUEST * Req)
 145 {
 146         /* Shut down server */
 147
 148         CONN_ID c;
 149         CLIENT *cl;
 150
 151         assert(Client != NULL);
 152         assert(Req != NULL);
 153
 154         if (!Check_Oper(Client, Req))
 155                 return No_Privileges(Client, Req);
 156
 157         /* Bad number of parameters? */
 158 #ifdef STRICT_RFC
 159         if (Req->argc != 0)
 160 #else
 161         if (Req->argc > 1)
 162 #endif
 163                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 164                                           Client_ID(Client), Req->command);
 165
 166         /* Is a message given? */
 167         if (Req->argc > 0) {
 168                 c = Conn_First();
 169                 while (c != NONE) {
 170                         cl = Conn_GetClient(c);
 171                         if (Client_Type(cl) == CLIENT_USER)
 172                                 IRC_WriteStrClient(cl, "NOTICE %s :%s",
 173                                                 Client_ID(cl), Req->argv[0]);
 174                         c = Conn_Next(c);
 175                 }
 176         }
 177
 178         Log(LOG_NOTICE | LOG_snotice, "Got DIE command from \"%s\" ...",
 179             Client_Mask(Client));
 180         NGIRCd_SignalQuit = true;
 181
 182         return CONNECTED;
 183 } /* IRC_DIE */
 184
 185
 186 GLOBAL bool
 187 IRC_REHASH( CLIENT *Client, REQUEST *Req )
 188 {
 189         /* Reload configuration file */
 190
 191         assert( Client != NULL );
 192         assert( Req != NULL );
 193
 194         if (!Check_Oper(Client, Req))
 195                 return No_Privileges(Client, Req);
 196
 197         /* Bad number of parameters? */
 198         if( Req->argc != 0 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 199
 200         Log( LOG_NOTICE|LOG_snotice, "Got REHASH command from \"%s\" ...", Client_Mask( Client ));
 201         NGIRCd_SignalRehash = true;
 202
 203         return CONNECTED;
 204 } /* IRC_REHASH */
 205
 206
 207 GLOBAL bool
 208 IRC_RESTART( CLIENT *Client, REQUEST *Req )
 209 {
 210         /* Restart IRC server (fork a new process) */
 211
 212         assert( Client != NULL );
 213         assert( Req != NULL );
 214
 215         if (!Check_Oper(Client, Req))
 216                 return No_Privileges(Client, Req);
 217
 218         /* Bad number of parameters? */
 219         if( Req->argc != 0 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 220
 221         Log( LOG_NOTICE|LOG_snotice, "Got RESTART command from \"%s\" ...", Client_Mask( Client ));
 222         NGIRCd_SignalRestart = true;
 223         return CONNECTED;
 224 } /* IRC_RESTART */
 225
 226
 227 /**
 228  * Connect configured or new server.
 229  */
 230 GLOBAL bool
 231 IRC_CONNECT(CLIENT * Client, REQUEST * Req)
 232 {
 233         CLIENT *from, *target;
 234
 235         assert(Client != NULL);
 236         assert(Req != NULL);
 237
 238         if (!Check_Oper(Client, Req))
 239                 return No_Privileges(Client, Req);
 240
 241         /* Bad number of parameters? */
 242         if (Req->argc != 1 && Req->argc != 2 && Req->argc != 3 &&
 243             Req->argc != 5 && Req->argc != 6)
 244                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 245                                           Client_ID(Client), Req->command);
 246
 247         /* Invalid port number? */
 248         if ((Req->argc > 1) && atoi(Req->argv[1]) < 1)
 249                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 250                                           Client_ID(Client), Req->command);
 251
 252         from = Client;
 253         target = Client_ThisServer();
 254
 255         if (Req->argc == 3 || Req->argc == 6) {
 256                 /* This CONNECT has a target parameter */
 257                 if (Client_Type(Client) == CLIENT_SERVER)
 258                         from = Client_Search(Req->prefix);
 259                 if (! from)
 260                         return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 261                                         Client_ID(Client), Req->prefix);
 262
 263                 target = (Req->argc == 3) ? Client_Search(Req->argv[2])
 264                                           : Client_Search(Req->argv[5]);
 265                 if (! target || Client_Type(target) != CLIENT_SERVER)
 266                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 267                                         Client_ID(from), Req->argv[0]);
 268         }
 269
 270         if (target != Client_ThisServer()) {
 271                 /* Forward CONNECT command ... */
 272                 if (Req->argc == 3)
 273                         IRC_WriteStrClientPrefix(target, from,
 274                                  "CONNECT %s %s :%s", Req->argv[0],
 275                                  Req->argv[1], Req->argv[2]);
 276                 else
 277                         IRC_WriteStrClientPrefix(target, from,
 278                                 "CONNECT %s %s %s %s %s :%s", Req->argv[0],
 279                                 Req->argv[1], Req->argv[2], Req->argv[3],
 280                                 Req->argv[4], Req->argv[5]);
 281                 return CONNECTED;
 282         }
 283
 284         Log(LOG_NOTICE | LOG_snotice,
 285             "Got CONNECT command from \"%s\" for \"%s\".", Client_Mask(from),
 286             Req->argv[0]);
 287         IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
 288                         "Received CONNECT %s from %s",
 289                         Req->argv[0], Client_ID(from));
 290
 291         switch (Req->argc) {
 292         case 1:
 293                 if (!Conf_EnablePassiveServer(Req->argv[0]))
 294                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 295                                                   Client_ID(from),
 296                                                   Req->argv[0]);
 297                 break;
 298         case 2:
 299         case 3:
 300                 /* Connect configured server */
 301                 if (!Conf_EnableServer
 302                     (Req->argv[0], (UINT16) atoi(Req->argv[1])))
 303                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 304                                                   Client_ID(from),
 305                                                   Req->argv[0]);
 306                 break;
 307         default:
 308                 /* Add server */
 309                 if (!Conf_AddServer
 310                     (Req->argv[0], (UINT16) atoi(Req->argv[1]), Req->argv[2],
 311                      Req->argv[3], Req->argv[4]))
 312                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 313                                                   Client_ID(from),
 314                                                   Req->argv[0]);
 315         }
 316
 317         return CONNECTED;
 318 } /* IRC_CONNECT */
 319
 320
 321 /**
 322  * Disconnect (and disable) configured server.
 323  */
 324 GLOBAL bool
 325 IRC_DISCONNECT(CLIENT * Client, REQUEST * Req)
 326 {
 327         CONN_ID my_conn;
 328
 329         assert(Client != NULL);
 330         assert(Req != NULL);
 331
 332         if (!Check_Oper(Client, Req))
 333                 return No_Privileges(Client, Req);
 334
 335         /* Bad number of parameters? */
 336         if (Req->argc != 1)
 337                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 338                                           Client_ID(Client), Req->command);
 339
 340         IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
 341                         "Received DISCONNECT %s from %s",
 342                         Req->argv[0], Client_ID(Client));
 343
 344         Log(LOG_NOTICE | LOG_snotice,
 345             "Got DISCONNECT command from \"%s\" for \"%s\".",
 346             Client_Mask(Client), Req->argv[0]);
 347
 348         /* Save ID of this connection */
 349         my_conn = Client_Conn(Client);
 350
 351         /* Disconnect configured server */
 352         if (!Conf_DisableServer(Req->argv[0]))
 353                 return IRC_WriteStrClient(Client, ERR_NOSUCHSERVER_MSG,
 354                                           Client_ID(Client), Req->argv[0]);
 355
 356         /* Are we still connected or were we killed, too? */
 357         if (Conn_GetClient(my_conn))
 358                 return CONNECTED;
 359         else
 360                 return DISCONNECTED;
 361 } /* IRC_DISCONNECT */
 362
 363
 364 GLOBAL bool
 365 IRC_WALLOPS( CLIENT *Client, REQUEST *Req )
 366 {
 367         CLIENT *from;
 368
 369         assert( Client != NULL );
 370         assert( Req != NULL );
 371
 372         if (Req->argc != 1)
 373                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG, Client_ID(Client), Req->command);
 374
 375         switch (Client_Type(Client)) {
 376         case CLIENT_USER:
 377                 if (!Client_OperByMe(Client))
 378                         return IRC_WriteStrClient(Client, ERR_NOPRIVILEGES_MSG, Client_ID(Client));
 379                 from = Client;
 380                 break;
 381         case CLIENT_SERVER:
 382                 from = Client_Search(Req->prefix);
 383                 break;
 384         default:
 385                 return CONNECTED;
 386         }
 387
 388         if (!from)
 389                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG, Client_ID(Client), Req->prefix);
 390
 391         IRC_SendWallops(Client, from, "%s", Req->argv[0]);
 392         return CONNECTED;
 393 } /* IRC_WALLOPS */
 394
 395
 396 /* -eof- */