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 1.33 2003/07/09 18:45:56 alex Exp $";
  18
  19 #include "imp.h"
  20 #include <assert.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "resolve.h"
  26 #include "conn.h"
  27 #include "conn-zip.h"
  28 #include "conf.h"
  29 #include "client.h"
  30 #include "channel.h"
  31 #include "irc-write.h"
  32 #include "log.h"
  33 #include "messages.h"
  34 #include "parse.h"
  35 #include "ngircd.h"
  36
  37 #include "exp.h"
  38 #include "irc-server.h"
  39
  40
  41 GLOBAL BOOLEAN
  42 IRC_SERVER( CLIENT *Client, REQUEST *Req )
  43 {
  44         CHAR str[LINE_LEN], *ptr, *modes, *topic;
  45         CLIENT *from, *c, *cl;
  46         CL2CHAN *cl2chan;
  47         INT max_hops, i;
  48         CHANNEL *chan;
  49         BOOLEAN ok;
  50         CONN_ID con;
  51
  52         assert( Client != NULL );
  53         assert( Req != NULL );
  54
  55         /* Fehler liefern, wenn kein lokaler Client */
  56         if( Client_Conn( Client ) <= NONE ) return IRC_WriteStrClient( Client, ERR_UNKNOWNCOMMAND_MSG, Client_ID( Client ), Req->command );
  57
  58         if( Client_Type( Client ) == CLIENT_GOTPASSSERVER )
  59         {
  60                 /* Verbindung soll als Server-Server-Verbindung registriert werden */
  61                 Log( LOG_DEBUG, "Connection %d: got SERVER command (new server link) ...", Client_Conn( Client ));
  62
  63                 /* Falsche Anzahl Parameter? */
  64                 if(( Req->argc != 2 ) && ( Req->argc != 3 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
  65
  66                 /* Ist dieser Server bei uns konfiguriert? */
  67                 for( i = 0; i < MAX_SERVERS; i++ ) if( strcasecmp( Req->argv[0], Conf_Server[i].name ) == 0 ) break;
  68                 if( i >= MAX_SERVERS )
  69                 {
  70                         /* Server ist nicht konfiguriert! */
  71                         Log( LOG_ERR, "Connection %d: Server \"%s\" not configured here!", Client_Conn( Client ), Req->argv[0] );
  72                         Conn_Close( Client_Conn( Client ), NULL, "Server not configured here", TRUE );
  73                         return DISCONNECTED;
  74                 }
  75                 if( strcmp( Client_Password( Client ), Conf_Server[i].pwd_in ) != 0 )
  76                 {
  77                         /* Falsches Passwort */
  78                         Log( LOG_ERR, "Connection %d: Got bad password from server \"%s\"!", Client_Conn( Client ), Req->argv[0] );
  79                         Conn_Close( Client_Conn( Client ), NULL, "Bad password", TRUE );
  80                         return DISCONNECTED;
  81                 }
  82
  83                 /* Ist ein Server mit dieser ID bereits registriert? */
  84                 if( ! Client_CheckID( Client, Req->argv[0] )) return DISCONNECTED;
  85
  86                 /* Server-Strukturen fuellen ;-) */
  87                 Client_SetID( Client, Req->argv[0] );
  88                 Client_SetHops( Client, 1 );
  89                 Client_SetInfo( Client, Req->argv[Req->argc - 1] );
  90
  91                 /* Meldet sich der Server bei uns an (d.h., bauen nicht wir
  92                  * selber die Verbindung zu einem anderen Server auf)? */
  93                 con = Client_Conn( Client );
  94                 if( Client_Token( Client ) != TOKEN_OUTBOUND )
  95                 {
  96                         /* Eingehende Verbindung: Unseren SERVER- und PASS-Befehl senden */
  97                         ok = TRUE;
  98                         if( ! IRC_WriteStrClient( Client, "PASS %s %s", Conf_Server[i].pwd_out, NGIRCd_ProtoID )) ok = FALSE;
  99                         else ok = IRC_WriteStrClient( Client, "SERVER %s 1 :%s", Conf_ServerName, Conf_ServerInfo );
 100                         if( ! ok )
 101                         {
 102                                 Conn_Close( con, "Unexpected server behavior!", NULL, FALSE );
 103                                 return DISCONNECTED;
 104                         }
 105                         Client_SetIntroducer( Client, Client );
 106                         Client_SetToken( Client, 1 );
 107                 }
 108                 else
 109                 {
 110                         /* Ausgehende verbindung, SERVER und PASS wurden von uns bereits
 111                          * an die Gegenseite uerbermittelt */
 112                         Client_SetToken( Client, atoi( Req->argv[1] ));
 113                 }
 114
 115                 Log( LOG_NOTICE|LOG_snotice, "Server \"%s\" registered (connection %d, 1 hop - direct link).", Client_ID( Client ), con );
 116
 117                 Client_SetType( Client, CLIENT_SERVER );
 118                 Conf_SetServer( i, con );
 119
 120 #ifdef USE_ZLIB
 121                 /* Kompression initialisieren, wenn erforderlich */
 122                 if( strchr( Client_Flags( Client ), 'Z' ))
 123                 {
 124                         if( ! Zip_InitConn( con ))
 125                         {
 126                                 /* Fehler! */
 127                                 Conn_Close( con, "Can't inizialize compression (zlib)!", NULL, FALSE );
 128                                 return DISCONNECTED;
 129                         }
 130                 }
 131 #endif
 132
 133                 /* maximalen Hop Count ermitteln */
 134                 max_hops = 0;
 135                 c = Client_First( );
 136                 while( c )
 137                 {
 138                         if( Client_Hops( c ) > max_hops ) max_hops = Client_Hops( c );
 139                         c = Client_Next( c );
 140                 }
 141
 142                 /* Alle bisherigen Server dem neuen Server bekannt machen,
 143                  * die bisherigen Server ueber den neuen informierenn */
 144                 for( i = 0; i < ( max_hops + 1 ); i++ )
 145                 {
 146                         c = Client_First( );
 147                         while( c )
 148                         {
 149                                 if(( Client_Type( c ) == CLIENT_SERVER ) && ( c != Client ) && ( c != Client_ThisServer( )) && ( Client_Hops( c ) == i ))
 150                                 {
 151                                         if( Client_Conn( c ) > NONE )
 152                                         {
 153                                                 /* Dem gefundenen Server gleich den neuen
 154                                                  * Server bekannt machen */
 155                                                 if( ! IRC_WriteStrClient( c, "SERVER %s %d %d :%s", Client_ID( Client ), Client_Hops( Client ) + 1, Client_MyToken( Client ), Client_Info( Client ))) return DISCONNECTED;
 156                                         }
 157
 158                                         /* Den neuen Server ueber den alten informieren */
 159                                         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;
 160                                 }
 161                                 c = Client_Next( c );
 162                         }
 163                 }
 164
 165                 /* alle User dem neuen Server bekannt machen */
 166                 c = Client_First( );
 167                 while( c )
 168                 {
 169                         if( Client_Type( c ) == CLIENT_USER )
 170                         {
 171                                 /* User an neuen Server melden */
 172                                 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;
 173                         }
 174                         c = Client_Next( c );
 175                 }
 176
 177                 /* Channels dem neuen Server bekannt machen */
 178                 chan = Channel_First( );
 179                 while( chan )
 180                 {
 181 #ifdef IRCPLUS
 182                         /* Send CHANINFO if the peer supports it */
 183                         if( strchr( Client_Flags( Client ), 'C' ))
 184                         {
 185                                 modes = Channel_Modes( chan );
 186                                 topic = Channel_Topic( chan );
 187
 188                                 if( *modes || *topic )
 189                                 {
 190                                         /* send CHANINFO */
 191                                         if(( ! strchr( Channel_Modes( chan ), 'k' )) && ( ! strchr( Channel_Modes( chan ), 'l' )) && ( ! *topic ))
 192                                         {
 193                                                 /* "CHANINFO <chan> +<modes>" */
 194                                                 if( ! IRC_WriteStrClient( Client, "CHANINFO %s +%s", Channel_Name( chan ), modes )) return DISCONNECTED;
 195                                         }
 196                                         else if(( ! strchr( Channel_Modes( chan ), 'k' )) && ( ! strchr( Channel_Modes( chan ), 'l' )))
 197                                         {
 198                                                 /* "CHANINFO <chan> +<modes> :<topic>" */
 199                                                 if( ! IRC_WriteStrClient( Client, "CHANINFO %s +%s :%s", Channel_Name( chan ), modes, topic )) return DISCONNECTED;
 200                                         }
 201                                         else
 202                                         {
 203                                                 /* "CHANINFO <chan> +<modes> <key> <limit> :<topic>" */
 204                                                 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;
 205                                         }
 206                                 }
 207                         }
 208 #endif
 209
 210                         /* alle Member suchen */
 211                         cl2chan = Channel_FirstMember( chan );
 212                         snprintf( str, sizeof( str ), "NJOIN %s :", Channel_Name( chan ));
 213                         while( cl2chan )
 214                         {
 215                                 cl = Channel_GetClient( cl2chan );
 216                                 assert( cl != NULL );
 217
 218                                 /* Nick, ggf. mit Modes, anhaengen */
 219                                 if( str[strlen( str ) - 1] != ':' ) strlcat( str, ",", sizeof( str ));
 220                                 if( strchr( Channel_UserModes( chan, cl ), 'v' )) strlcat( str, "+", sizeof( str ));
 221                                 if( strchr( Channel_UserModes( chan, cl ), 'o' )) strlcat( str, "@", sizeof( str ));
 222                                 strlcat( str, Client_ID( cl ), sizeof( str ));
 223
 224                                 if( strlen( str ) > ( LINE_LEN - CLIENT_NICK_LEN - 8 ))
 225                                 {
 226                                         /* Zeile senden */
 227                                         if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
 228                                         snprintf( str, sizeof( str ), "NJOIN %s :", Channel_Name( chan ));
 229                                 }
 230
 231                                 cl2chan = Channel_NextMember( chan, cl2chan );
 232                         }
 233
 234                         /* noch Daten da? */
 235                         if( str[strlen( str ) - 1] != ':')
 236                         {
 237                                 /* Ja; Also senden ... */
 238                                 if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
 239                         }
 240
 241                         /* naechsten Channel suchen */
 242                         chan = Channel_Next( chan );
 243                 }
 244
 245                 return CONNECTED;
 246         }
 247         else if( Client_Type( Client ) == CLIENT_SERVER )
 248         {
 249                 /* Neuer Server wird im Netz angekuendigt */
 250
 251                 /* Falsche Anzahl Parameter? */
 252                 if( Req->argc != 4 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 253
 254                 /* Ist ein Server mit dieser ID bereits registriert? */
 255                 if( ! Client_CheckID( Client, Req->argv[0] )) return DISCONNECTED;
 256
 257                 /* Ueberfluessige Hostnamen aus Info-Text entfernen */
 258                 ptr = strchr( Req->argv[3] + 2, '[' );
 259                 if( ! ptr ) ptr = Req->argv[3];
 260
 261                 from = Client_Search( Req->prefix );
 262                 if( ! from )
 263                 {
 264                         /* Hm, Server, der diesen einfuehrt, ist nicht bekannt!? */
 265                         Log( LOG_ALERT, "Unknown ID in prefix of SERVER: \"%s\"! (on connection %d)", Req->prefix, Client_Conn( Client ));
 266                         Conn_Close( Client_Conn( Client ), NULL, "Unknown ID in prefix of SERVER", TRUE );
 267                         return DISCONNECTED;
 268                 }
 269
 270                 /* Neue Client-Struktur anlegen */
 271                 c = Client_NewRemoteServer( Client, Req->argv[0], from, atoi( Req->argv[1] ), atoi( Req->argv[2] ), ptr, TRUE );
 272                 if( ! c )
 273                 {
 274                         /* Neue Client-Struktur konnte nicht angelegt werden */
 275                         Log( LOG_ALERT, "Can't create client structure for server! (on connection %d)", Client_Conn( Client ));
 276                         Conn_Close( Client_Conn( Client ), NULL, "Can't allocate client structure for remote server", TRUE );
 277                         return DISCONNECTED;
 278                 }
 279
 280                 /* Log-Meldung zusammenbauen und ausgeben */
 281                 if(( Client_Hops( c ) > 1 ) && ( Req->prefix[0] )) snprintf( str, sizeof( str ), "connected to %s, ", Client_ID( from ));
 282                 else strcpy( str, "" );
 283                 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": "" );
 284
 285                 /* Andere Server informieren */
 286                 IRC_WriteStrServersPrefix( Client, from, "SERVER %s %d %d :%s", Client_ID( c ), Client_Hops( c ) + 1, Client_MyToken( c ), Client_Info( c ));
 287
 288                 return CONNECTED;
 289         }
 290         else return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 291 } /* IRC_SERVER */
 292
 293
 294 GLOBAL BOOLEAN
 295 IRC_NJOIN( CLIENT *Client, REQUEST *Req )
 296 {
 297         CHAR nick_in[COMMAND_LEN], nick_out[COMMAND_LEN], *channame, *ptr, modes[8];
 298         BOOLEAN is_op, is_voiced;
 299         CHANNEL *chan;
 300         CLIENT *c;
 301
 302         assert( Client != NULL );
 303         assert( Req != NULL );
 304
 305         /* Falsche Anzahl Parameter? */
 306         if( Req->argc != 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 307
 308         strlcpy( nick_in, Req->argv[1], sizeof( nick_in ));
 309         strcpy( nick_out, "" );
 310
 311         channame = Req->argv[0];
 312         ptr = strtok( nick_in, "," );
 313         while( ptr )
 314         {
 315                 is_op = is_voiced = FALSE;
 316
 317                 /* Prefixe abschneiden */
 318                 while(( *ptr == '@' ) || ( *ptr == '+' ))
 319                 {
 320                         if( *ptr == '@' ) is_op = TRUE;
 321                         if( *ptr == '+' ) is_voiced = TRUE;
 322                         ptr++;
 323                 }
 324
 325                 c = Client_Search( ptr );
 326                 if( c )
 327                 {
 328                         Channel_Join( c, channame );
 329                         chan = Channel_Search( channame );
 330                         assert( chan != NULL );
 331
 332                         if( is_op ) Channel_UserModeAdd( chan, c, 'o' );
 333                         if( is_voiced ) Channel_UserModeAdd( chan, c, 'v' );
 334
 335                         /* im Channel bekannt machen */
 336                         IRC_WriteStrChannelPrefix( Client, chan, c, FALSE, "JOIN :%s", channame );
 337
 338                         /* Channel-User-Modes setzen */
 339                         strlcpy( modes, Channel_UserModes( chan, c ), sizeof( modes ));
 340                         if( modes[0] )
 341                         {
 342                                 /* Modes im Channel bekannt machen */
 343                                 IRC_WriteStrChannelPrefix( Client, chan, Client, FALSE, "MODE %s +%s %s", channame, modes, Client_ID( c ));
 344                         }
 345
 346                         if( nick_out[0] != '\0' ) strlcat( nick_out, ",", sizeof( nick_out ));
 347                         if( is_op ) strlcat( nick_out, "@", sizeof( nick_out ));
 348                         if( is_voiced ) strlcat( nick_out, "+", sizeof( nick_out ));
 349                         strlcat( nick_out, ptr, sizeof( nick_out ));
 350                 }
 351                 else Log( LOG_ERR, "Got NJOIN for unknown nick \"%s\" for channel \"%s\"!", ptr, channame );
 352
 353                 /* naechsten Nick suchen */
 354                 ptr = strtok( NULL, "," );
 355         }
 356
 357         /* an andere Server weiterleiten */
 358         if( nick_out[0] != '\0' ) IRC_WriteStrServersPrefix( Client, Client_ThisServer( ), "NJOIN %s :%s", Req->argv[0], nick_out );
 359
 360         return CONNECTED;
 361 } /* IRC_NJOIN */
 362
 363
 364 GLOBAL BOOLEAN
 365 IRC_SQUIT( CLIENT *Client, REQUEST *Req )
 366 {
 367         CLIENT *target;
 368         CHAR msg[LINE_LEN + 64];
 369
 370         assert( Client != NULL );
 371         assert( Req != NULL );
 372
 373         /* Falsche Anzahl Parameter? */
 374         if( Req->argc != 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 375
 376         Log( LOG_DEBUG, "Got SQUIT from %s for \"%s\": \"%s\" ...", Client_ID( Client ), Req->argv[0], Req->argv[1] );
 377
 378         target = Client_Search( Req->argv[0] );
 379         if( ! target )
 380         {
 381                 /* Den Server kennen wir nicht (mehr), also nichts zu tun. */
 382                 Log( LOG_WARNING, "Got SQUIT from %s for unknown server \"%s\"!?", Client_ID( Client ), Req->argv[0] );
 383                 return CONNECTED;
 384         }
 385
 386         if( Req->argv[1][0] )
 387         {
 388                 if( strlen( Req->argv[1] ) > LINE_LEN ) Req->argv[1][LINE_LEN] = '\0';
 389                 snprintf( msg, sizeof( msg ), "%s (SQUIT from %s).", Req->argv[1], Client_ID( Client ));
 390         }
 391         else snprintf( msg, sizeof( msg ), "Got SQUIT from %s.", Client_ID( Client ));
 392
 393         if( Client_Conn( target ) > NONE )
 394         {
 395                 /* dieser Server hat die Connection */
 396                 if( Req->argv[1][0] ) Conn_Close( Client_Conn( target ), msg, Req->argv[1], TRUE );
 397                 else Conn_Close( Client_Conn( target ), msg, NULL, TRUE );
 398                 return DISCONNECTED;
 399         }
 400         else
 401         {
 402                 /* Verbindung hielt anderer Server */
 403                 Client_Destroy( target, msg, Req->argv[1], FALSE );
 404                 return CONNECTED;
 405         }
 406 } /* IRC_SQUIT */
 407
 408
 409 /* -eof- */