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         IRC_SetPenalty(Client, 3);
  52         return IRC_WriteStrClient(Client, ERR_PASSWDMISMATCH_MSG,
  53                                   Client_ID(Client));
  54 } /* Bad_OperPass */
  55
  56 /**
  57  * Handler for the IRC "OPER" command.
  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         _IRC_ARGC_EQ_OR_RETURN_(Client, Req, 2)
  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         if (!Client_OperByMe(Client))
  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         Client_SetOperByMe(Client, true);
 102         return IRC_WriteStrClient(Client, RPL_YOUREOPER_MSG, Client_ID(Client));
 103 } /* IRC_OPER */
 104
 105 /**
 106  * Handler for the IRC "DIE" command.
 107  *
 108  * @param Client The client from which this command has been received.
 109  * @param Req Request structure with prefix and all parameters.
 110  * @return CONNECTED or DISCONNECTED.
 111  */
 112 GLOBAL bool
 113 IRC_DIE(CLIENT * Client, REQUEST * Req)
 114 {
 115         /* Shut down server */
 116
 117         CONN_ID c;
 118         CLIENT *cl;
 119
 120         assert(Client != NULL);
 121         assert(Req != NULL);
 122
 123         if (!Op_Check(Client, Req))
 124                 return Op_NoPrivileges(Client, Req);
 125
 126 #ifdef STRICT_RFC
 127         _IRC_ARGC_EQ_OR_RETURN_(Client, Req, 0)
 128 #else
 129         _IRC_ARGC_LE_OR_RETURN_(Client, Req, 1)
 130 #endif
 131
 132         /* Is a message given? */
 133         if (Req->argc > 0) {
 134                 c = Conn_First();
 135                 while (c != NONE) {
 136                         cl = Conn_GetClient(c);
 137                         if (Client_Type(cl) == CLIENT_USER)
 138                                 IRC_WriteStrClient(cl, "NOTICE %s :%s",
 139                                                 Client_ID(cl), Req->argv[0]);
 140                         c = Conn_Next(c);
 141                 }
 142         }
 143
 144         Log(LOG_NOTICE | LOG_snotice, "Got DIE command from \"%s\" ...",
 145             Client_Mask(Client));
 146         NGIRCd_SignalQuit = true;
 147
 148         return CONNECTED;
 149 } /* IRC_DIE */
 150
 151 /**
 152  * Handler for the IRC "REHASH" command.
 153  *
 154  * @param Client The client from which this command has been received.
 155  * @param Req Request structure with prefix and all parameters.
 156  * @return CONNECTED or DISCONNECTED.
 157  */
 158 GLOBAL bool
 159 IRC_REHASH( CLIENT *Client, REQUEST *Req )
 160 {
 161         /* Reload configuration file */
 162
 163         assert( Client != NULL );
 164         assert( Req != NULL );
 165
 166         if (!Op_Check(Client, Req))
 167                 return Op_NoPrivileges(Client, Req);
 168
 169         _IRC_ARGC_EQ_OR_RETURN_(Client, Req, 0)
 170
 171         Log(LOG_NOTICE|LOG_snotice, "Got REHASH command from \"%s\" ...",
 172             Client_Mask(Client));
 173         IRC_WriteStrClient(Client, RPL_REHASHING_MSG, Client_ID(Client));
 174
 175         raise(SIGHUP);
 176
 177         return CONNECTED;
 178 } /* IRC_REHASH */
 179
 180 /**
 181  * Handler for the IRC "RESTART" command.
 182  *
 183  * @param Client The client from which this command has been received.
 184  * @param Req Request structure with prefix and all parameters.
 185  * @return CONNECTED or DISCONNECTED.
 186  */
 187 GLOBAL bool
 188 IRC_RESTART( CLIENT *Client, REQUEST *Req )
 189 {
 190         /* Restart IRC server (fork a new process) */
 191
 192         assert( Client != NULL );
 193         assert( Req != NULL );
 194
 195         if (!Op_Check(Client, Req))
 196                 return Op_NoPrivileges(Client, Req);
 197
 198         /* Bad number of parameters? */
 199         if (Req->argc != 0)
 200                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 201                                           Client_ID(Client), Req->command);
 202
 203         Log(LOG_NOTICE|LOG_snotice, "Got RESTART command from \"%s\" ...",
 204             Client_Mask(Client));
 205         NGIRCd_SignalRestart = true;
 206
 207         return CONNECTED;
 208 } /* IRC_RESTART */
 209
 210 /**
 211  * Handler for the IRC "CONNECT" command.
 212  *
 213  * @param Client The client from which this command has been received.
 214  * @param Req Request structure with prefix and all parameters.
 215  * @return CONNECTED or DISCONNECTED.
 216  */
 217 GLOBAL bool
 218 IRC_CONNECT(CLIENT * Client, REQUEST * Req)
 219 {
 220         CLIENT *from, *target;
 221
 222         assert(Client != NULL);
 223         assert(Req != NULL);
 224
 225         if (Client_Type(Client) != CLIENT_SERVER
 226             && !Client_HasMode(Client, 'o'))
 227                 return Op_NoPrivileges(Client, Req);
 228
 229         /* Bad number of parameters? */
 230         if (Req->argc != 1 && Req->argc != 2 && Req->argc != 3 &&
 231             Req->argc != 5 && Req->argc != 6)
 232                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 233                                           Client_ID(Client), Req->command);
 234
 235         /* Invalid port number? */
 236         if ((Req->argc > 1) && atoi(Req->argv[1]) < 1)
 237                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 238                                           Client_ID(Client), Req->command);
 239
 240         from = Client;
 241         target = Client_ThisServer();
 242
 243         if (Req->argc == 3 || Req->argc == 6) {
 244                 /* This CONNECT has a target parameter */
 245                 if (Client_Type(Client) == CLIENT_SERVER && Req->prefix)
 246                         from = Client_Search(Req->prefix);
 247                 if (! from)
 248                         return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 249                                         Client_ID(Client), Req->prefix);
 250
 251                 target = (Req->argc == 3) ? Client_Search(Req->argv[2])
 252                                           : Client_Search(Req->argv[5]);
 253                 if (! target || Client_Type(target) != CLIENT_SERVER)
 254                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 255                                         Client_ID(from), Req->argv[0]);
 256         }
 257
 258         if (target != Client_ThisServer()) {
 259                 /* Forward CONNECT command ... */
 260                 if (Req->argc == 3)
 261                         IRC_WriteStrClientPrefix(target, from,
 262                                  "CONNECT %s %s :%s", Req->argv[0],
 263                                  Req->argv[1], Req->argv[2]);
 264                 else
 265                         IRC_WriteStrClientPrefix(target, from,
 266                                 "CONNECT %s %s %s %s %s :%s", Req->argv[0],
 267                                 Req->argv[1], Req->argv[2], Req->argv[3],
 268                                 Req->argv[4], Req->argv[5]);
 269                 return CONNECTED;
 270         }
 271
 272         if (!Op_Check(from, Req))
 273                 return Op_NoPrivileges(Client, Req);
 274
 275         switch (Req->argc) {
 276         case 1:
 277                 if (!Conf_EnablePassiveServer(Req->argv[0]))
 278                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 279                                                   Client_ID(from),
 280                                                   Req->argv[0]);
 281                 break;
 282         case 2:
 283         case 3:
 284                 /* Connect configured server */
 285                 if (!Conf_EnableServer
 286                     (Req->argv[0], (UINT16) atoi(Req->argv[1])))
 287                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 288                                                   Client_ID(from),
 289                                                   Req->argv[0]);
 290                 break;
 291         default:
 292                 /* Add server */
 293                 if (!Conf_AddServer
 294                     (Req->argv[0], (UINT16) atoi(Req->argv[1]), Req->argv[2],
 295                      Req->argv[3], Req->argv[4]))
 296                         return IRC_WriteStrClient(from, ERR_NOSUCHSERVER_MSG,
 297                                                   Client_ID(from),
 298                                                   Req->argv[0]);
 299         }
 300
 301         Log(LOG_NOTICE | LOG_snotice,
 302             "Got CONNECT command from \"%s\" for \"%s\".", Client_Mask(from),
 303             Req->argv[0]);
 304         IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
 305                         "Received CONNECT %s from %s",
 306                         Req->argv[0], Client_ID(from));
 307
 308         return CONNECTED;
 309 } /* IRC_CONNECT */
 310
 311 /**
 312  * Handler for the IRC "DISCONNECT" command.
 313  *
 314  * This command is not specified in the IRC RFCs, it is an extension
 315  * of ngIRCd: it shuts down and disables a configured server connection.
 316  *
 317  * @param Client The client from which this command has been received.
 318  * @param Req Request structure with prefix and all parameters.
 319  * @return CONNECTED or DISCONNECTED.
 320  */
 321 GLOBAL bool
 322 IRC_DISCONNECT(CLIENT * Client, REQUEST * Req)
 323 {
 324         CONN_ID my_conn;
 325
 326         assert(Client != NULL);
 327         assert(Req != NULL);
 328
 329         if (!Op_Check(Client, Req))
 330                 return Op_NoPrivileges(Client, Req);
 331
 332         /* Bad number of parameters? */
 333         if (Req->argc != 1)
 334                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 335                                           Client_ID(Client), Req->command);
 336
 337         IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
 338                         "Received DISCONNECT %s from %s",
 339                         Req->argv[0], Client_ID(Client));
 340
 341         Log(LOG_NOTICE | LOG_snotice,
 342             "Got DISCONNECT command from \"%s\" for \"%s\".",
 343             Client_Mask(Client), Req->argv[0]);
 344
 345         /* Save ID of this connection */
 346         my_conn = Client_Conn(Client);
 347
 348         /* Disconnect configured server */
 349         if (!Conf_DisableServer(Req->argv[0]))
 350                 return IRC_WriteStrClient(Client, ERR_NOSUCHSERVER_MSG,
 351                                           Client_ID(Client), Req->argv[0]);
 352
 353         /* Are we still connected or were we killed, too? */
 354         if (Conn_GetClient(my_conn))
 355                 return CONNECTED;
 356         else
 357                 return DISCONNECTED;
 358 } /* IRC_DISCONNECT */
 359
 360 /**
 361  * Handler for the IRC "WALLOPS" command.
 362  *
 363  * @param Client The client from which this command has been received.
 364  * @param Req Request structure with prefix and all parameters.
 365  * @return CONNECTED or DISCONNECTED.
 366  */
 367 GLOBAL bool
 368 IRC_WALLOPS( CLIENT *Client, REQUEST *Req )
 369 {
 370         CLIENT *from;
 371
 372         assert( Client != NULL );
 373         assert( Req != NULL );
 374
 375         _IRC_ARGC_EQ_OR_RETURN_(Client, Req, 1)
 376
 377         switch (Client_Type(Client)) {
 378         case CLIENT_USER:
 379                 if (!Client_OperByMe(Client))
 380                         return IRC_WriteStrClient(Client, ERR_NOPRIVILEGES_MSG,
 381                                                   Client_ID(Client));
 382                 from = Client;
 383                 break;
 384         case CLIENT_SERVER:
 385                 from = Client_Search(Req->prefix);
 386                 break;
 387         default:
 388                 return CONNECTED;
 389         }
 390
 391         if (!from)
 392                 return IRC_WriteStrClient(Client, ERR_NOSUCHNICK_MSG,
 393                                           Client_ID(Client), Req->prefix);
 394
 395         IRC_SendWallops(Client, from, "%s", Req->argv[0]);
 396         return CONNECTED;
 397 } /* IRC_WALLOPS */
 398
 399 /**
 400  * Handle <?>LINE commands (GLINE, KLINE).
 401  *
 402  * @param Client The client from which this command has been received.
 403  * @param Req Request structure with prefix and all parameters.
 404  * @return CONNECTED or DISCONNECTED.
 405  */
 406 GLOBAL bool
 407 IRC_xLINE(CLIENT *Client, REQUEST *Req)
 408 {
 409         CLIENT *from;
 410         int class;
 411         char class_c;
 412
 413         assert(Client != NULL);
 414         assert(Req != NULL);
 415
 416         from = Op_Check(Client, Req);
 417         if (!from)
 418                 return Op_NoPrivileges(Client, Req);
 419
 420         /* Bad number of parameters? */
 421         if (Req->argc != 1 && Req->argc != 3)
 422                 return IRC_WriteStrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 423                                           Client_ID(Client), Req->command);
 424
 425         switch(Req->command[0]) {
 426                 case 'g':
 427                 case 'G':
 428                         class = CLASS_GLINE; class_c = 'G';
 429                         break;
 430                 case 'k':
 431                 case 'K':
 432                         class = CLASS_KLINE; class_c = 'K';
 433                         break;
 434                 default:
 435                         Log(LOG_CRIT,
 436                             "IRC_xLINE() called for unknown line: %c!? Ignored.",
 437                             Req->command[0]);
 438                         return CONNECTED;
 439         }
 440
 441         if (Req->argc == 1) {
 442                 /* Delete mask from list */
 443                 Class_DeleteMask(class, Req->argv[0]);
 444                 Log(LOG_NOTICE|LOG_snotice,
 445                     "\"%s\" deleted \"%s\" from %c-Line list.",
 446                     Client_Mask(from), Req->argv[0], class_c);
 447                 if (class == CLASS_GLINE) {
 448                         /* Inform other servers */
 449                         IRC_WriteStrServersPrefix(Client, from, "%s %s",
 450                                                   Req->command, Req->argv[0]);
 451
 452                 }
 453         } else {
 454                 /* Add new mask to list */
 455                 if (Class_AddMask(class, Req->argv[0],
 456                                   time(NULL) + atol(Req->argv[1]),
 457                                   Req->argv[2])) {
 458                         Log(LOG_NOTICE|LOG_snotice,
 459                             "\"%s\" added \"%s\" to %c-Line list: \"%s\" (%ld seconds).",
 460                             Client_Mask(from), Req->argv[0], class_c,
 461                             Req->argv[2], atol(Req->argv[1]));
 462                         if (class == CLASS_GLINE) {
 463                                 /* Inform other servers */
 464                                 IRC_WriteStrServersPrefix(Client, from,
 465                                                 "%s %s %s :%s", Req->command,
 466                                                 Req->argv[0], Req->argv[1],
 467                                                 Req->argv[2]);
 468                         }
 469                 }
 470         }
 471
 472         return CONNECTED;
 473 }
 474
 475 /* -eof- */