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         return IRC_WriteErrClient(Client, ERR_PASSWDMISMATCH_MSG,
  54                                   Client_ID(Client));
  55 } /* Bad_OperPass */
  56
  57 /**
  58  * Handler for the IRC "OPER" command.
  59  *
  60  * @param Client The client from which this command has been received.
  61  * @param Req Request structure with prefix and all parameters.
  62  * @return CONNECTED or DISCONNECTED.
  63  */
  64 GLOBAL bool
  65 IRC_OPER( CLIENT *Client, REQUEST *Req )
  66 {
  67         struct Conf_Oper *op;
  68         size_t len, i;
  69
  70         assert( Client != NULL );
  71         assert( Req != NULL );
  72
  73         len = array_length(&Conf_Opers, sizeof(*op));
  74         op = array_start(&Conf_Opers);
  75         for (i = 0; i < len && strcmp(op[i].name, Req->argv[0]); i++)
  76                 ;
  77         if (i >= len)
  78                 return Bad_OperPass(Client, Req->argv[0], "not configured");
  79
  80         if (strcmp(op[i].pwd, Req->argv[1]) != 0)
  81                 return Bad_OperPass(Client, op[i].name, "bad password");
  82
  83         if (op[i].mask && (!Match(op[i].mask, Client_Mask(Client))))
  84                 return Bad_OperPass(Client, op[i].mask, "hostmask check failed");
  85
  86         if (!Client_HasMode(Client, 'o')) {
  87                 Client_ModeAdd(Client, 'o');
  88                 if (!IRC_WriteStrClient(Client, "MODE %s :+o",
  89                                         Client_ID(Client)))
  90                         return DISCONNECTED;
  91                 IRC_WriteStrServersPrefix(NULL, Client, "MODE %s :+o",
  92                                           Client_ID(Client));
  93         }
  94
  95         Log(LOG_NOTICE|LOG_snotice,
  96             "Got valid OPER for \"%s\" from \"%s\", user is an IRC operator now.",
  97             Req->argv[0], Client_Mask(Client));
  98
  99         return IRC_WriteStrClient(Client, RPL_YOUREOPER_MSG, Client_ID(Client));
 100 } /* IRC_OPER */
 101
 102 /**
 103  * Handler for the IRC "DIE" command.
 104  *
 105  * @param Client The client from which this command has been received.
 106  * @param Req Request structure with prefix and all parameters.
 107  * @return CONNECTED or DISCONNECTED.
 108  */
 109 GLOBAL bool
 110 IRC_DIE(CLIENT * Client, REQUEST * Req)
 111 {
 112         /* Shut down server */
 113
 114         CONN_ID c;
 115         CLIENT *cl;
 116
 117         assert(Client != NULL);
 118         assert(Req != NULL);
 119
 120         if (!Op_Check(Client, Req))
 121                 return Op_NoPrivileges(Client, Req);
 122
 123         /* Is a message given? */
 124         if (Req->argc > 0) {
 125                 c = Conn_First();
 126                 while (c != NONE) {
 127                         cl = Conn_GetClient(c);
 128                         if (Client_Type(cl) == CLIENT_USER)
 129                                 IRC_WriteStrClient(cl, "NOTICE %s :%s",
 130                                                 Client_ID(cl), Req->argv[0]);
 131                         c = Conn_Next(c);
 132                 }
 133         }
 134
 135         Log(LOG_NOTICE | LOG_snotice, "Got DIE command from \"%s\" ...",
 136             Client_Mask(Client));
 137         NGIRCd_SignalQuit = true;
 138
 139         return CONNECTED;
 140 } /* IRC_DIE */
 141
 142 /**
 143  * Handler for the IRC "REHASH" command.
 144  *
 145  * @param Client The client from which this command has been received.
 146  * @param Req Request structure with prefix and all parameters.
 147  * @return CONNECTED or DISCONNECTED.
 148  */
 149 GLOBAL bool
 150 IRC_REHASH( CLIENT *Client, REQUEST *Req )
 151 {
 152         /* Reload configuration file */
 153
 154         assert( Client != NULL );
 155         assert( Req != NULL );
 156
 157         if (!Op_Check(Client, Req))
 158                 return Op_NoPrivileges(Client, Req);
 159
 160         Log(LOG_NOTICE|LOG_snotice, "Got REHASH command from \"%s\" ...",
 161             Client_Mask(Client));
 162         IRC_WriteStrClient(Client, RPL_REHASHING_MSG, Client_ID(Client));
 163
 164         raise(SIGHUP);
 165
 166         return CONNECTED;
 167 } /* IRC_REHASH */
 168
 169 /**
 170  * Handler for the IRC "RESTART" command.
 171  *
 172  * @param Client The client from which this command has been received.
 173  * @param Req Request structure with prefix and all parameters.
 174  * @return CONNECTED or DISCONNECTED.
 175  */
 176 GLOBAL bool
 177 IRC_RESTART( CLIENT *Client, REQUEST *Req )
 178 {
 179         /* Restart IRC server (fork a new process) */
 180
 181         assert( Client != NULL );
 182         assert( Req != NULL );
 183
 184         if (!Op_Check(Client, Req))
 185                 return Op_NoPrivileges(Client, Req);
 186
 187         Log(LOG_NOTICE|LOG_snotice, "Got RESTART command from \"%s\" ...",
 188             Client_Mask(Client));
 189         NGIRCd_SignalRestart = true;
 190
 191         return CONNECTED;
 192 } /* IRC_RESTART */
 193
 194 /**
 195  * Handler for the IRC "CONNECT" command.
 196  *
 197  * @param Client The client from which this command has been received.
 198  * @param Req Request structure with prefix and all parameters.
 199  * @return CONNECTED or DISCONNECTED.
 200  */
 201 GLOBAL bool
 202 IRC_CONNECT(CLIENT * Client, REQUEST * Req)
 203 {
 204         CLIENT *from, *target;
 205
 206         assert(Client != NULL);
 207         assert(Req != NULL);
 208
 209         /* Bad number of parameters? */
 210         if (Req->argc != 1 && Req->argc != 2 && Req->argc != 3 &&
 211             Req->argc != 5 && Req->argc != 6)
 212                 return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 213                                           Client_ID(Client), Req->command);
 214
 215         /* Invalid port number? */
 216         if ((Req->argc > 1) && atoi(Req->argv[1]) < 1)
 217                 return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 218                                           Client_ID(Client), Req->command);
 219
 220         if (Client_Type(Client) != CLIENT_SERVER
 221             && !Client_HasMode(Client, 'o'))
 222                 return Op_NoPrivileges(Client, Req);
 223
 224         from = Client;
 225         target = Client_ThisServer();
 226
 227         if (Req->argc == 3 || Req->argc == 6) {
 228                 /* This CONNECT has a target parameter */
 229                 if (Client_Type(Client) == CLIENT_SERVER && Req->prefix)
 230                         from = Client_Search(Req->prefix);
 231                 if (! from)
 232                         return IRC_WriteErrClient(Client, ERR_NOSUCHNICK_MSG,
 233                                                   Client_ID(Client), Req->prefix);
 234
 235                 target = (Req->argc == 3) ? Client_Search(Req->argv[2])
 236                                           : Client_Search(Req->argv[5]);
 237                 if (! target || Client_Type(target) != CLIENT_SERVER)
 238                         return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
 239                                                   Client_ID(from), Req->argv[0]);
 240         }
 241
 242         if (target != Client_ThisServer()) {
 243                 /* Forward CONNECT command ... */
 244                 if (Req->argc == 3)
 245                         IRC_WriteStrClientPrefix(target, from,
 246                                  "CONNECT %s %s :%s", Req->argv[0],
 247                                  Req->argv[1], Req->argv[2]);
 248                 else
 249                         IRC_WriteStrClientPrefix(target, from,
 250                                 "CONNECT %s %s %s %s %s :%s", Req->argv[0],
 251                                 Req->argv[1], Req->argv[2], Req->argv[3],
 252                                 Req->argv[4], Req->argv[5]);
 253                 return CONNECTED;
 254         }
 255
 256         if (!Op_Check(from, Req))
 257                 return Op_NoPrivileges(Client, Req);
 258
 259         switch (Req->argc) {
 260         case 1:
 261                 if (!Conf_EnablePassiveServer(Req->argv[0]))
 262                         return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
 263                                                   Client_ID(from),
 264                                                   Req->argv[0]);
 265                 break;
 266         case 2:
 267         case 3:
 268                 /* Connect configured server */
 269                 if (!Conf_EnableServer
 270                     (Req->argv[0], (UINT16) atoi(Req->argv[1])))
 271                         return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
 272                                                   Client_ID(from),
 273                                                   Req->argv[0]);
 274                 break;
 275         default:
 276                 /* Add server */
 277                 if (!Conf_AddServer
 278                     (Req->argv[0], (UINT16) atoi(Req->argv[1]), Req->argv[2],
 279                      Req->argv[3], Req->argv[4]))
 280                         return IRC_WriteErrClient(from, ERR_NOSUCHSERVER_MSG,
 281                                                   Client_ID(from),
 282                                                   Req->argv[0]);
 283         }
 284
 285         Log(LOG_NOTICE | LOG_snotice,
 286             "Got CONNECT command from \"%s\" for \"%s\".", Client_Mask(from),
 287             Req->argv[0]);
 288         IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
 289                         "Received CONNECT %s from %s",
 290                         Req->argv[0], Client_ID(from));
 291
 292         return CONNECTED;
 293 } /* IRC_CONNECT */
 294
 295 /**
 296  * Handler for the IRC "DISCONNECT" command.
 297  *
 298  * This command is not specified in the IRC RFCs, it is an extension
 299  * of ngIRCd: it shuts down and disables a configured server connection.
 300  *
 301  * @param Client The client from which this command has been received.
 302  * @param Req Request structure with prefix and all parameters.
 303  * @return CONNECTED or DISCONNECTED.
 304  */
 305 GLOBAL bool
 306 IRC_DISCONNECT(CLIENT * Client, REQUEST * Req)
 307 {
 308         CONN_ID my_conn;
 309
 310         assert(Client != NULL);
 311         assert(Req != NULL);
 312
 313         if (!Op_Check(Client, Req))
 314                 return Op_NoPrivileges(Client, Req);
 315
 316         IRC_SendWallops(Client_ThisServer(), Client_ThisServer(),
 317                         "Received DISCONNECT %s from %s",
 318                         Req->argv[0], Client_ID(Client));
 319
 320         Log(LOG_NOTICE | LOG_snotice,
 321             "Got DISCONNECT command from \"%s\" for \"%s\".",
 322             Client_Mask(Client), Req->argv[0]);
 323
 324         /* Save ID of this connection */
 325         my_conn = Client_Conn(Client);
 326
 327         /* Disconnect configured server */
 328         if (!Conf_DisableServer(Req->argv[0]))
 329                 return IRC_WriteErrClient(Client, ERR_NOSUCHSERVER_MSG,
 330                                           Client_ID(Client), Req->argv[0]);
 331
 332         /* Are we still connected or were we killed, too? */
 333         if (Conn_GetClient(my_conn))
 334                 return CONNECTED;
 335         else
 336                 return DISCONNECTED;
 337 } /* IRC_DISCONNECT */
 338
 339 /**
 340  * Handler for the IRC "WALLOPS" command.
 341  *
 342  * @param Client The client from which this command has been received.
 343  * @param Req Request structure with prefix and all parameters.
 344  * @return CONNECTED or DISCONNECTED.
 345  */
 346 GLOBAL bool
 347 IRC_WALLOPS( CLIENT *Client, REQUEST *Req )
 348 {
 349         CLIENT *from;
 350
 351         assert( Client != NULL );
 352         assert( Req != NULL );
 353
 354         switch (Client_Type(Client)) {
 355         case CLIENT_USER:
 356                 if (!Op_Check(Client, Req))
 357                         return Op_NoPrivileges(Client, Req);
 358                 from = Client;
 359                 break;
 360         case CLIENT_SERVER:
 361                 from = Client_Search(Req->prefix);
 362                 break;
 363         default:
 364                 return CONNECTED;
 365         }
 366
 367         if (!from)
 368                 return IRC_WriteErrClient(Client, ERR_NOSUCHNICK_MSG,
 369                                           Client_ID(Client), Req->prefix);
 370
 371         IRC_SendWallops(Client, from, "%s", Req->argv[0]);
 372         return CONNECTED;
 373 } /* IRC_WALLOPS */
 374
 375 /**
 376  * Handle <?>LINE commands (GLINE, KLINE).
 377  *
 378  * @param Client The client from which this command has been received.
 379  * @param Req Request structure with prefix and all parameters.
 380  * @return CONNECTED or DISCONNECTED.
 381  */
 382 GLOBAL bool
 383 IRC_xLINE(CLIENT *Client, REQUEST *Req)
 384 {
 385         CLIENT *from, *c, *c_next;
 386         char reason[COMMAND_LEN], class_c;
 387         struct list_head *list;
 388         int class;
 389
 390         assert(Client != NULL);
 391         assert(Req != NULL);
 392
 393         /* Bad number of parameters? */
 394         if (Req->argc != 1 && Req->argc != 3)
 395                 return IRC_WriteErrClient(Client, ERR_NEEDMOREPARAMS_MSG,
 396                                           Client_ID(Client), Req->command);
 397
 398         from = Op_Check(Client, Req);
 399         if (!from)
 400                 return Op_NoPrivileges(Client, Req);
 401
 402         switch(Req->command[0]) {
 403                 case 'g':
 404                 case 'G':
 405                         class = CLASS_GLINE; class_c = 'G';
 406                         break;
 407                 case 'k':
 408                 case 'K':
 409                         class = CLASS_KLINE; class_c = 'K';
 410                         break;
 411                 default:
 412                         Log(LOG_CRIT,
 413                             "IRC_xLINE() called for unknown line: %c!? Ignored.",
 414                             Req->command[0]);
 415                         return CONNECTED;
 416         }
 417
 418         if (Req->argc == 1) {
 419                 /* Delete mask from list */
 420                 Class_DeleteMask(class, Req->argv[0]);
 421                 Log(LOG_NOTICE|LOG_snotice,
 422                     "\"%s\" deleted \"%s\" from %c-Line list.",
 423                     Client_Mask(from), Req->argv[0], class_c);
 424                 if (class == CLASS_GLINE) {
 425                         /* Inform other servers */
 426                         IRC_WriteStrServersPrefix(Client, from, "%s %s",
 427                                                   Req->command, Req->argv[0]);
 428
 429                 }
 430         } else {
 431                 /* Add new mask to list */
 432                 if (Class_AddMask(class, Req->argv[0],
 433                                   time(NULL) + atol(Req->argv[1]),
 434                                   Req->argv[2])) {
 435                         Log(LOG_NOTICE|LOG_snotice,
 436                             "\"%s\" added \"%s\" to %c-Line list: \"%s\" (%ld seconds).",
 437                             Client_Mask(from), Req->argv[0], class_c,
 438                             Req->argv[2], atol(Req->argv[1]));
 439                         if (class == CLASS_GLINE) {
 440                                 /* Inform other servers */
 441                                 IRC_WriteStrServersPrefix(Client, from,
 442                                                 "%s %s %s :%s", Req->command,
 443                                                 Req->argv[0], Req->argv[1],
 444                                                 Req->argv[2]);
 445                         }
 446
 447                         /* Check currently connected clients */
 448                         snprintf(reason, sizeof(reason), "%c-Line by \"%s\": \"%s\"",
 449                                  class_c, Client_ID(from), Req->argv[2]);
 450                         list = Class_GetList(class);
 451                         c = Client_First();
 452                         while (c) {
 453                                 c_next = Client_Next(c);
 454                                 if ((class == CLASS_GLINE || Client_Conn(c) > NONE)
 455                                     && Lists_Check(list, c))
 456                                         IRC_KillClient(Client, NULL,
 457                                                        Client_ID(c), reason);
 458                                 c = c_next;
 459                         }
 460                 }
 461         }
 462
 463         return CONNECTED;
 464 }
 465
 466 /* -eof- */