src/ngircd/irc-server.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001,2002 by 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 commands for server links
  12  */
  13
  14
  15 #include "portab.h"
  16
  17 static char UNUSED id[] = "$Id: irc-server.c,v 1.36 2004/04/25 15:43:18 alex Exp $";
  18
  19 #include "imp.h"
  20 #include <assert.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <strings.h>
  25
  26 #include "resolve.h"
  27 #include "conn.h"
  28 #include "conn-zip.h"
  29 #include "conf.h"
  30 #include "client.h"
  31 #include "channel.h"
  32 #include "irc-write.h"
  33 #include "lists.h"
  34 #include "log.h"
  35 #include "messages.h"
  36 #include "parse.h"
  37 #include "ngircd.h"
  38
  39 #include "exp.h"
  40 #include "irc-server.h"
  41
  42
  43 GLOBAL BOOLEAN
  44 IRC_SERVER( CLIENT *Client, REQUEST *Req )
  45 {
  46         CHAR str[LINE_LEN], *ptr, *modes, *topic;
  47         CLIENT *from, *c, *cl;
  48         CL2CHAN *cl2chan;
  49         INT max_hops, i;
  50         CHANNEL *chan;
  51         BOOLEAN ok;
  52         CONN_ID con;
  53
  54         assert( Client != NULL );
  55         assert( Req != NULL );
  56
  57         /* Fehler liefern, wenn kein lokaler Client */
  58         if( Client_Conn( Client ) <= NONE ) return IRC_WriteStrClient( Client, ERR_UNKNOWNCOMMAND_MSG, Client_ID( Client ), Req->command );
  59
  60         if( Client_Type( Client ) == CLIENT_GOTPASSSERVER )
  61         {
  62                 /* Verbindung soll als Server-Server-Verbindung registriert werden */
  63                 Log( LOG_DEBUG, "Connection %d: got SERVER command (new server link) ...", Client_Conn( Client ));
  64
  65                 /* Falsche Anzahl Parameter? */
  66                 if(( Req->argc != 2 ) && ( Req->argc != 3 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
  67
  68                 /* Ist dieser Server bei uns konfiguriert? */
  69                 for( i = 0; i < MAX_SERVERS; i++ ) if( strcasecmp( Req->argv[0], Conf_Server[i].name ) == 0 ) break;
  70                 if( i >= MAX_SERVERS )
  71                 {
  72                         /* Server ist nicht konfiguriert! */
  73                         Log( LOG_ERR, "Connection %d: Server \"%s\" not configured here!", Client_Conn( Client ), Req->argv[0] );
  74                         Conn_Close( Client_Conn( Client ), NULL, "Server not configured here", TRUE );
  75                         return DISCONNECTED;
  76                 }
  77                 if( strcmp( Client_Password( Client ), Conf_Server[i].pwd_in ) != 0 )
  78                 {
  79                         /* Falsches Passwort */
  80                         Log( LOG_ERR, "Connection %d: Got bad password from server \"%s\"!", Client_Conn( Client ), Req->argv[0] );
  81                         Conn_Close( Client_Conn( Client ), NULL, "Bad password", TRUE );
  82                         return DISCONNECTED;
  83                 }
  84
  85                 /* Ist ein Server mit dieser ID bereits registriert? */
  86                 if( ! Client_CheckID( Client, Req->argv[0] )) return DISCONNECTED;
  87
  88                 /* Server-Strukturen fuellen ;-) */
  89                 Client_SetID( Client, Req->argv[0] );
  90                 Client_SetHops( Client, 1 );
  91                 Client_SetInfo( Client, Req->argv[Req->argc - 1] );
  92
  93                 /* Meldet sich der Server bei uns an (d.h., bauen nicht wir
  94                  * selber die Verbindung zu einem anderen Server auf)? */
  95                 con = Client_Conn( Client );
  96                 if( Client_Token( Client ) != TOKEN_OUTBOUND )
  97                 {
  98                         /* Eingehende Verbindung: Unseren SERVER- und PASS-Befehl senden */
  99                         ok = TRUE;
 100                         if( ! IRC_WriteStrClient( Client, "PASS %s %s", Conf_Server[i].pwd_out, NGIRCd_ProtoID )) ok = FALSE;
 101                         else ok = IRC_WriteStrClient( Client, "SERVER %s 1 :%s", Conf_ServerName, Conf_ServerInfo );
 102                         if( ! ok )
 103                         {
 104                                 Conn_Close( con, "Unexpected server behavior!", NULL, FALSE );
 105                                 return DISCONNECTED;
 106                         }
 107                         Client_SetIntroducer( Client, Client );
 108                         Client_SetToken( Client, 1 );
 109                 }
 110                 else
 111                 {
 112                         /* Ausgehende verbindung, SERVER und PASS wurden von uns bereits
 113                          * an die Gegenseite uerbermittelt */
 114                         Client_SetToken( Client, atoi( Req->argv[1] ));
 115                 }
 116
 117                 Log( LOG_NOTICE|LOG_snotice, "Server \"%s\" registered (connection %d, 1 hop - direct link).", Client_ID( Client ), con );
 118
 119                 Client_SetType( Client, CLIENT_SERVER );
 120                 Conf_SetServer( i, con );
 121
 122 #ifdef ZLIB
 123                 /* Kompression initialisieren, wenn erforderlich */
 124                 if( strchr( Client_Flags( Client ), 'Z' ))
 125                 {
 126                         if( ! Zip_InitConn( con ))
 127                         {
 128                                 /* Fehler! */
 129                                 Conn_Close( con, "Can't inizialize compression (zlib)!", NULL, FALSE );
 130                                 return DISCONNECTED;
 131                         }
 132                 }
 133 #endif
 134
 135                 /* maximalen Hop Count ermitteln */
 136                 max_hops = 0;
 137                 c = Client_First( );
 138                 while( c )
 139                 {
 140                         if( Client_Hops( c ) > max_hops ) max_hops = Client_Hops( c );
 141                         c = Client_Next( c );
 142                 }
 143
 144                 /* Alle bisherigen Server dem neuen Server bekannt machen,
 145                  * die bisherigen Server ueber den neuen informierenn */
 146                 for( i = 0; i < ( max_hops + 1 ); i++ )
 147                 {
 148                         c = Client_First( );
 149                         while( c )
 150                         {
 151                                 if(( Client_Type( c ) == CLIENT_SERVER ) && ( c != Client ) && ( c != Client_ThisServer( )) && ( Client_Hops( c ) == i ))
 152                                 {
 153                                         if( Client_Conn( c ) > NONE )
 154                                         {
 155                                                 /* Dem gefundenen Server gleich den neuen
 156                                                  * Server bekannt machen */
 157                                                 if( ! IRC_WriteStrClient( c, "SERVER %s %d %d :%s", Client_ID( Client ), Client_Hops( Client ) + 1, Client_MyToken( Client ), Client_Info( Client ))) return DISCONNECTED;
 158                                         }
 159
 160                                         /* Den neuen Server ueber den alten informieren */
 161                                         if( ! IRC_WriteStrClientPrefix( Client, Client_Hops( c ) == 1 ? Client_ThisServer( ) : Client_Introducer( c ), "SERVER %s %d %d :%s", Client_ID( c ), Client_Hops( c ) + 1, Client_MyToken( c ), Client_Info( c ))) return DISCONNECTED;
 162                                 }
 163                                 c = Client_Next( c );
 164                         }
 165                 }
 166
 167                 /* alle User dem neuen Server bekannt machen */
 168                 c = Client_First( );
 169                 while( c )
 170                 {
 171                         if( Client_Type( c ) == CLIENT_USER )
 172                         {
 173                                 /* User an neuen Server melden */
 174                                 if( ! IRC_WriteStrClient( Client, "NICK %s %d %s %s %d +%s :%s", Client_ID( c ), Client_Hops( c ) + 1, Client_User( c ), Client_Hostname( c ), Client_MyToken( Client_Introducer( c )), Client_Modes( c ), Client_Info( c ))) return DISCONNECTED;
 175                         }
 176                         c = Client_Next( c );
 177                 }
 178
 179                 /* Channels dem neuen Server bekannt machen */
 180                 chan = Channel_First( );
 181                 while( chan )
 182                 {
 183 #ifdef IRCPLUS
 184                         /* Send CHANINFO if the peer supports it */
 185                         if( strchr( Client_Flags( Client ), 'C' ))
 186                         {
 187 #ifdef DEBUG
 188                                 Log( LOG_DEBUG, "Sending CHANINFO commands ..." );
 189 #endif
 190                                 modes = Channel_Modes( chan );
 191                                 topic = Channel_Topic( chan );
 192
 193                                 if( *modes || *topic )
 194                                 {
 195                                         /* send CHANINFO */
 196                                         if(( ! strchr( Channel_Modes( chan ), 'k' )) && ( ! strchr( Channel_Modes( chan ), 'l' )) && ( ! *topic ))
 197                                         {
 198                                                 /* "CHANINFO <chan> +<modes>" */
 199                                                 if( ! IRC_WriteStrClient( Client, "CHANINFO %s +%s", Channel_Name( chan ), modes )) return DISCONNECTED;
 200                                         }
 201                                         else if(( ! strchr( Channel_Modes( chan ), 'k' )) && ( ! strchr( Channel_Modes( chan ), 'l' )))
 202                                         {
 203                                                 /* "CHANINFO <chan> +<modes> :<topic>" */
 204                                                 if( ! IRC_WriteStrClient( Client, "CHANINFO %s +%s :%s", Channel_Name( chan ), modes, topic )) return DISCONNECTED;
 205                                         }
 206                                         else
 207                                         {
 208                                                 /* "CHANINFO <chan> +<modes> <key> <limit> :<topic>" */
 209                                                 if( ! IRC_WriteStrClient( Client, "CHANINFO %s +%s %s %ld :%s", Channel_Name( chan ), modes, strchr( Channel_Modes( chan ), 'k' ) ? Channel_Key( chan ) : "*", strchr( Channel_Modes( chan ), 'l' ) ? Channel_MaxUsers( chan ) : 0L, topic )) return DISCONNECTED;
 210                                         }
 211                                 }
 212                         }
 213 #endif
 214
 215                         /* alle Member suchen */
 216                         cl2chan = Channel_FirstMember( chan );
 217                         snprintf( str, sizeof( str ), "NJOIN %s :", Channel_Name( chan ));
 218                         while( cl2chan )
 219                         {
 220                                 cl = Channel_GetClient( cl2chan );
 221                                 assert( cl != NULL );
 222
 223                                 /* Nick, ggf. mit Modes, anhaengen */
 224                                 if( str[strlen( str ) - 1] != ':' ) strlcat( str, ",", sizeof( str ));
 225                                 if( strchr( Channel_UserModes( chan, cl ), 'v' )) strlcat( str, "+", sizeof( str ));
 226                                 if( strchr( Channel_UserModes( chan, cl ), 'o' )) strlcat( str, "@", sizeof( str ));
 227                                 strlcat( str, Client_ID( cl ), sizeof( str ));
 228
 229                                 if( strlen( str ) > ( LINE_LEN - CLIENT_NICK_LEN - 8 ))
 230                                 {
 231                                         /* Zeile senden */
 232                                         if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
 233                                         snprintf( str, sizeof( str ), "NJOIN %s :", Channel_Name( chan ));
 234                                 }
 235
 236                                 cl2chan = Channel_NextMember( chan, cl2chan );
 237                         }
 238
 239                         /* noch Daten da? */
 240                         if( str[strlen( str ) - 1] != ':')
 241                         {
 242                                 /* Ja; Also senden ... */
 243                                 if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
 244                         }
 245
 246 #ifdef IRCPLUS
 247                         if( strchr( Client_Flags( Client ), 'L' ))
 248                         {
 249 #ifdef DEBUG
 250                                 Log( LOG_DEBUG, "Synchronizing INVITE- and BAN-lists ..." );
 251 #endif
 252                                 /* Synchronize INVITE- and BAN-lists */
 253                                 if( ! Lists_SendInvites( Client )) return DISCONNECTED;
 254                                 if( ! Lists_SendBans( Client )) return DISCONNECTED;
 255                         }
 256 #endif
 257
 258                         /* naechsten Channel suchen */
 259                         chan = Channel_Next( chan );
 260                 }
 261
 262                 return CONNECTED;
 263         }
 264         else if( Client_Type( Client ) == CLIENT_SERVER )
 265         {
 266                 /* Neuer Server wird im Netz angekuendigt */
 267
 268                 /* Falsche Anzahl Parameter? */
 269                 if( Req->argc != 4 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 270
 271                 /* Ist ein Server mit dieser ID bereits registriert? */
 272                 if( ! Client_CheckID( Client, Req->argv[0] )) return DISCONNECTED;
 273
 274                 /* Ueberfluessige Hostnamen aus Info-Text entfernen */
 275                 ptr = strchr( Req->argv[3] + 2, '[' );
 276                 if( ! ptr ) ptr = Req->argv[3];
 277
 278                 from = Client_Search( Req->prefix );
 279                 if( ! from )
 280                 {
 281                         /* Hm, Server, der diesen einfuehrt, ist nicht bekannt!? */
 282                         Log( LOG_ALERT, "Unknown ID in prefix of SERVER: \"%s\"! (on connection %d)", Req->prefix, Client_Conn( Client ));
 283                         Conn_Close( Client_Conn( Client ), NULL, "Unknown ID in prefix of SERVER", TRUE );
 284                         return DISCONNECTED;
 285                 }
 286
 287                 /* Neue Client-Struktur anlegen */
 288                 c = Client_NewRemoteServer( Client, Req->argv[0], from, atoi( Req->argv[1] ), atoi( Req->argv[2] ), ptr, TRUE );
 289                 if( ! c )
 290                 {
 291                         /* Neue Client-Struktur konnte nicht angelegt werden */
 292                         Log( LOG_ALERT, "Can't create client structure for server! (on connection %d)", Client_Conn( Client ));
 293                         Conn_Close( Client_Conn( Client ), NULL, "Can't allocate client structure for remote server", TRUE );
 294                         return DISCONNECTED;
 295                 }
 296
 297                 /* Log-Meldung zusammenbauen und ausgeben */
 298                 if(( Client_Hops( c ) > 1 ) && ( Req->prefix[0] )) snprintf( str, sizeof( str ), "connected to %s, ", Client_ID( from ));
 299                 else strcpy( str, "" );
 300                 Log( LOG_NOTICE|LOG_snotice, "Server \"%s\" registered (via %s, %s%d hop%s).", Client_ID( c ), Client_ID( Client ), str, Client_Hops( c ), Client_Hops( c ) > 1 ? "s": "" );
 301
 302                 /* Andere Server informieren */
 303                 IRC_WriteStrServersPrefix( Client, from, "SERVER %s %d %d :%s", Client_ID( c ), Client_Hops( c ) + 1, Client_MyToken( c ), Client_Info( c ));
 304
 305                 return CONNECTED;
 306         }
 307         else return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 308 } /* IRC_SERVER */
 309
 310
 311 GLOBAL BOOLEAN
 312 IRC_NJOIN( CLIENT *Client, REQUEST *Req )
 313 {
 314         CHAR nick_in[COMMAND_LEN], nick_out[COMMAND_LEN], *channame, *ptr, modes[8];
 315         BOOLEAN is_op, is_voiced;
 316         CHANNEL *chan;
 317         CLIENT *c;
 318
 319         assert( Client != NULL );
 320         assert( Req != NULL );
 321
 322         /* Falsche Anzahl Parameter? */
 323         if( Req->argc != 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 324
 325         strlcpy( nick_in, Req->argv[1], sizeof( nick_in ));
 326         strcpy( nick_out, "" );
 327
 328         channame = Req->argv[0];
 329         ptr = strtok( nick_in, "," );
 330         while( ptr )
 331         {
 332                 is_op = is_voiced = FALSE;
 333
 334                 /* Prefixe abschneiden */
 335                 while(( *ptr == '@' ) || ( *ptr == '+' ))
 336                 {
 337                         if( *ptr == '@' ) is_op = TRUE;
 338                         if( *ptr == '+' ) is_voiced = TRUE;
 339                         ptr++;
 340                 }
 341
 342                 c = Client_Search( ptr );
 343                 if( c )
 344                 {
 345                         Channel_Join( c, channame );
 346                         chan = Channel_Search( channame );
 347                         assert( chan != NULL );
 348
 349                         if( is_op ) Channel_UserModeAdd( chan, c, 'o' );
 350                         if( is_voiced ) Channel_UserModeAdd( chan, c, 'v' );
 351
 352                         /* im Channel bekannt machen */
 353                         IRC_WriteStrChannelPrefix( Client, chan, c, FALSE, "JOIN :%s", channame );
 354
 355                         /* Channel-User-Modes setzen */
 356                         strlcpy( modes, Channel_UserModes( chan, c ), sizeof( modes ));
 357                         if( modes[0] )
 358                         {
 359                                 /* Modes im Channel bekannt machen */
 360                                 IRC_WriteStrChannelPrefix( Client, chan, Client, FALSE, "MODE %s +%s %s", channame, modes, Client_ID( c ));
 361                         }
 362
 363                         if( nick_out[0] != '\0' ) strlcat( nick_out, ",", sizeof( nick_out ));
 364                         if( is_op ) strlcat( nick_out, "@", sizeof( nick_out ));
 365                         if( is_voiced ) strlcat( nick_out, "+", sizeof( nick_out ));
 366                         strlcat( nick_out, ptr, sizeof( nick_out ));
 367                 }
 368                 else Log( LOG_ERR, "Got NJOIN for unknown nick \"%s\" for channel \"%s\"!", ptr, channame );
 369
 370                 /* naechsten Nick suchen */
 371                 ptr = strtok( NULL, "," );
 372         }
 373
 374         /* an andere Server weiterleiten */
 375         if( nick_out[0] != '\0' ) IRC_WriteStrServersPrefix( Client, Client_ThisServer( ), "NJOIN %s :%s", Req->argv[0], nick_out );
 376
 377         return CONNECTED;
 378 } /* IRC_NJOIN */
 379
 380
 381 GLOBAL BOOLEAN
 382 IRC_SQUIT( CLIENT *Client, REQUEST *Req )
 383 {
 384         CLIENT *target;
 385         CHAR msg[LINE_LEN + 64];
 386
 387         assert( Client != NULL );
 388         assert( Req != NULL );
 389
 390         /* Falsche Anzahl Parameter? */
 391         if( Req->argc != 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 392
 393         Log( LOG_DEBUG, "Got SQUIT from %s for \"%s\": \"%s\" ...", Client_ID( Client ), Req->argv[0], Req->argv[1] );
 394
 395         target = Client_Search( Req->argv[0] );
 396         if( ! target )
 397         {
 398                 /* Den Server kennen wir nicht (mehr), also nichts zu tun. */
 399                 Log( LOG_WARNING, "Got SQUIT from %s for unknown server \"%s\"!?", Client_ID( Client ), Req->argv[0] );
 400                 return CONNECTED;
 401         }
 402
 403         if( Req->argv[1][0] )
 404         {
 405                 if( strlen( Req->argv[1] ) > LINE_LEN ) Req->argv[1][LINE_LEN] = '\0';
 406                 snprintf( msg, sizeof( msg ), "%s (SQUIT from %s).", Req->argv[1], Client_ID( Client ));
 407         }
 408         else snprintf( msg, sizeof( msg ), "Got SQUIT from %s.", Client_ID( Client ));
 409
 410         if( Client_Conn( target ) > NONE )
 411         {
 412                 /* dieser Server hat die Connection */
 413                 if( Req->argv[1][0] ) Conn_Close( Client_Conn( target ), msg, Req->argv[1], TRUE );
 414                 else Conn_Close( Client_Conn( target ), msg, NULL, TRUE );
 415                 return DISCONNECTED;
 416         }
 417         else
 418         {
 419                 /* Verbindung hielt anderer Server */
 420                 Client_Destroy( target, msg, Req->argv[1], FALSE );
 421                 return CONNECTED;
 422         }
 423 } /* IRC_SQUIT */
 424
 425
 426 /* -eof- */