src/ngircd/irc-server.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  * Copyright (c)2001-2006 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 1.39 2006/04/30 21:31:43 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 "defines.h"
  27 #include "resolve.h"
  28 #include "conn.h"
  29 #include "conn-zip.h"
  30 #include "conf.h"
  31 #include "client.h"
  32 #include "channel.h"
  33 #include "irc-write.h"
  34 #include "lists.h"
  35 #include "log.h"
  36 #include "messages.h"
  37 #include "parse.h"
  38 #include "ngircd.h"
  39
  40 #include "exp.h"
  41 #include "irc-server.h"
  42
  43
  44 GLOBAL bool
  45 IRC_SERVER( CLIENT *Client, REQUEST *Req )
  46 {
  47         char str[LINE_LEN], *ptr, *modes, *topic;
  48         CLIENT *from, *c, *cl;
  49         CL2CHAN *cl2chan;
  50         int max_hops, i;
  51         CHANNEL *chan;
  52         bool ok;
  53         CONN_ID con;
  54
  55         assert( Client != NULL );
  56         assert( Req != NULL );
  57
  58         /* Fehler liefern, wenn kein lokaler Client */
  59         if( Client_Conn( Client ) <= NONE ) return IRC_WriteStrClient( Client, ERR_UNKNOWNCOMMAND_MSG, Client_ID( Client ), Req->command );
  60
  61         if( Client_Type( Client ) == CLIENT_GOTPASSSERVER )
  62         {
  63                 /* Verbindung soll als Server-Server-Verbindung registriert werden */
  64                 Log( LOG_DEBUG, "Connection %d: got SERVER command (new server link) ...", Client_Conn( Client ));
  65
  66                 /* Falsche Anzahl Parameter? */
  67                 if(( Req->argc != 2 ) && ( Req->argc != 3 )) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
  68
  69                 /* Ist dieser Server bei uns konfiguriert? */
  70                 for( i = 0; i < MAX_SERVERS; i++ ) if( strcasecmp( Req->argv[0], Conf_Server[i].name ) == 0 ) break;
  71                 if( i >= MAX_SERVERS )
  72                 {
  73                         /* Server ist nicht konfiguriert! */
  74                         Log( LOG_ERR, "Connection %d: Server \"%s\" not configured here!", Client_Conn( Client ), Req->argv[0] );
  75                         Conn_Close( Client_Conn( Client ), NULL, "Server not configured here", true);
  76                         return DISCONNECTED;
  77                 }
  78                 if( strcmp( Client_Password( Client ), Conf_Server[i].pwd_in ) != 0 )
  79                 {
  80                         /* Falsches Passwort */
  81                         Log( LOG_ERR, "Connection %d: Got bad password from server \"%s\"!", Client_Conn( Client ), Req->argv[0] );
  82                         Conn_Close( Client_Conn( Client ), NULL, "Bad password", true);
  83                         return DISCONNECTED;
  84                 }
  85
  86                 /* Ist ein Server mit dieser ID bereits registriert? */
  87                 if( ! Client_CheckID( Client, Req->argv[0] )) return DISCONNECTED;
  88
  89                 /* Server-Strukturen fuellen ;-) */
  90                 Client_SetID( Client, Req->argv[0] );
  91                 Client_SetHops( Client, 1 );
  92                 Client_SetInfo( Client, Req->argv[Req->argc - 1] );
  93
  94                 /* Meldet sich der Server bei uns an (d.h., bauen nicht wir
  95                  * selber die Verbindung zu einem anderen Server auf)? */
  96                 con = Client_Conn( Client );
  97                 if( Client_Token( Client ) != TOKEN_OUTBOUND )
  98                 {
  99                         /* Eingehende Verbindung: Unseren SERVER- und PASS-Befehl senden */
 100                         ok = true;
 101                         if( ! IRC_WriteStrClient( Client, "PASS %s %s", Conf_Server[i].pwd_out, NGIRCd_ProtoID )) ok = false;
 102                         else ok = IRC_WriteStrClient( Client, "SERVER %s 1 :%s", Conf_ServerName, Conf_ServerInfo );
 103                         if( ! ok )
 104                         {
 105                                 Conn_Close( con, "Unexpected server behavior!", NULL, false );
 106                                 return DISCONNECTED;
 107                         }
 108                         Client_SetIntroducer( Client, Client );
 109                         Client_SetToken( Client, 1 );
 110                 }
 111                 else
 112                 {
 113                         /* Ausgehende verbindung, SERVER und PASS wurden von uns bereits
 114                          * an die Gegenseite uerbermittelt */
 115                         Client_SetToken( Client, atoi( Req->argv[1] ));
 116                 }
 117
 118                 Log( LOG_NOTICE|LOG_snotice, "Server \"%s\" registered (connection %d, 1 hop - direct link).", Client_ID( Client ), con );
 119
 120                 Client_SetType( Client, CLIENT_SERVER );
 121                 Conf_SetServer( i, con );
 122
 123 #ifdef ZLIB
 124                 /* Kompression initialisieren, wenn erforderlich */
 125                 if( strchr( Client_Flags( Client ), 'Z' ))
 126                 {
 127                         if( ! Zip_InitConn( con ))
 128                         {
 129                                 /* Fehler! */
 130                                 Conn_Close( con, "Can't inizialize compression (zlib)!", NULL, false );
 131                                 return DISCONNECTED;
 132                         }
 133                 }
 134 #endif
 135
 136                 /* maximalen Hop Count ermitteln */
 137                 max_hops = 0;
 138                 c = Client_First( );
 139                 while( c )
 140                 {
 141                         if( Client_Hops( c ) > max_hops ) max_hops = Client_Hops( c );
 142                         c = Client_Next( c );
 143                 }
 144
 145                 /* Alle bisherigen Server dem neuen Server bekannt machen,
 146                  * die bisherigen Server ueber den neuen informierenn */
 147                 for( i = 0; i < ( max_hops + 1 ); i++ )
 148                 {
 149                         c = Client_First( );
 150                         while( c )
 151                         {
 152                                 if(( Client_Type( c ) == CLIENT_SERVER ) && ( c != Client ) && ( c != Client_ThisServer( )) && ( Client_Hops( c ) == i ))
 153                                 {
 154                                         if( Client_Conn( c ) > NONE )
 155                                         {
 156                                                 /* Dem gefundenen Server gleich den neuen
 157                                                  * Server bekannt machen */
 158                                                 if( ! IRC_WriteStrClient( c, "SERVER %s %d %d :%s", Client_ID( Client ), Client_Hops( Client ) + 1, Client_MyToken( Client ), Client_Info( Client ))) return DISCONNECTED;
 159                                         }
 160
 161                                         /* Den neuen Server ueber den alten informieren */
 162                                         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;
 163                                 }
 164                                 c = Client_Next( c );
 165                         }
 166                 }
 167
 168                 /* alle User dem neuen Server bekannt machen */
 169                 c = Client_First( );
 170                 while( c )
 171                 {
 172                         if( Client_Type( c ) == CLIENT_USER )
 173                         {
 174                                 /* User an neuen Server melden */
 175                                 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;
 176                         }
 177                         c = Client_Next( c );
 178                 }
 179
 180                 /* Channels dem neuen Server bekannt machen */
 181                 chan = Channel_First( );
 182                 while( chan )
 183                 {
 184 #ifdef IRCPLUS
 185                         /* Send CHANINFO if the peer supports it */
 186                         if( strchr( Client_Flags( Client ), 'C' ))
 187                         {
 188 #ifdef DEBUG
 189                                 Log( LOG_DEBUG, "Sending CHANINFO commands ..." );
 190 #endif
 191                                 modes = Channel_Modes( chan );
 192                                 topic = Channel_Topic( chan );
 193
 194                                 if( *modes || *topic )
 195                                 {
 196                                         /* send CHANINFO */
 197                                         if(( ! strchr( Channel_Modes( chan ), 'k' )) && ( ! strchr( Channel_Modes( chan ), 'l' )) && ( ! *topic ))
 198                                         {
 199                                                 /* "CHANINFO <chan> +<modes>" */
 200                                                 if( ! IRC_WriteStrClient( Client, "CHANINFO %s +%s", Channel_Name( chan ), modes )) return DISCONNECTED;
 201                                         }
 202                                         else if(( ! strchr( Channel_Modes( chan ), 'k' )) && ( ! strchr( Channel_Modes( chan ), 'l' )))
 203                                         {
 204                                                 /* "CHANINFO <chan> +<modes> :<topic>" */
 205                                                 if( ! IRC_WriteStrClient( Client, "CHANINFO %s +%s :%s", Channel_Name( chan ), modes, topic )) return DISCONNECTED;
 206                                         }
 207                                         else
 208                                         {
 209                                                 /* "CHANINFO <chan> +<modes> <key> <limit> :<topic>" */
 210                                                 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;
 211                                         }
 212                                 }
 213                         }
 214 #endif
 215
 216                         /* alle Member suchen */
 217                         cl2chan = Channel_FirstMember( chan );
 218                         snprintf( str, sizeof( str ), "NJOIN %s :", Channel_Name( chan ));
 219                         while( cl2chan )
 220                         {
 221                                 cl = Channel_GetClient( cl2chan );
 222                                 assert( cl != NULL );
 223
 224                                 /* Nick, ggf. mit Modes, anhaengen */
 225                                 if( str[strlen( str ) - 1] != ':' ) strlcat( str, ",", sizeof( str ));
 226                                 if( strchr( Channel_UserModes( chan, cl ), 'v' )) strlcat( str, "+", sizeof( str ));
 227                                 if( strchr( Channel_UserModes( chan, cl ), 'o' )) strlcat( str, "@", sizeof( str ));
 228                                 strlcat( str, Client_ID( cl ), sizeof( str ));
 229
 230                                 if( strlen( str ) > ( LINE_LEN - CLIENT_NICK_LEN - 8 ))
 231                                 {
 232                                         /* Zeile senden */
 233                                         if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
 234                                         snprintf( str, sizeof( str ), "NJOIN %s :", Channel_Name( chan ));
 235                                 }
 236
 237                                 cl2chan = Channel_NextMember( chan, cl2chan );
 238                         }
 239
 240                         /* noch Daten da? */
 241                         if( str[strlen( str ) - 1] != ':')
 242                         {
 243                                 /* Ja; Also senden ... */
 244                                 if( ! IRC_WriteStrClient( Client, "%s", str )) return DISCONNECTED;
 245                         }
 246
 247                         /* Get next channel ... */
 248                         chan = Channel_Next(chan);
 249                 }
 250
 251 #ifdef IRCPLUS
 252                 if (strchr(Client_Flags(Client), 'L')) {
 253 #ifdef DEBUG
 254                         Log(LOG_DEBUG,
 255                             "Synchronizing INVITE- and BAN-lists ...");
 256 #endif
 257                         /* Synchronize INVITE- and BAN-lists */
 258                         if (! Lists_SendInvites(Client))
 259                                 return DISCONNECTED;
 260                         if (! Lists_SendBans(Client))
 261                                 return DISCONNECTED;
 262                 }
 263 #endif
 264
 265                 return CONNECTED;
 266         }
 267         else if( Client_Type( Client ) == CLIENT_SERVER )
 268         {
 269                 /* Neuer Server wird im Netz angekuendigt */
 270
 271                 /* Falsche Anzahl Parameter? */
 272                 if( Req->argc != 4 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 273
 274                 /* Ist ein Server mit dieser ID bereits registriert? */
 275                 if( ! Client_CheckID( Client, Req->argv[0] )) return DISCONNECTED;
 276
 277                 /* Ueberfluessige Hostnamen aus Info-Text entfernen */
 278                 ptr = strchr( Req->argv[3] + 2, '[' );
 279                 if( ! ptr ) ptr = Req->argv[3];
 280
 281                 from = Client_Search( Req->prefix );
 282                 if( ! from )
 283                 {
 284                         /* Hm, Server, der diesen einfuehrt, ist nicht bekannt!? */
 285                         Log( LOG_ALERT, "Unknown ID in prefix of SERVER: \"%s\"! (on connection %d)", Req->prefix, Client_Conn( Client ));
 286                         Conn_Close( Client_Conn( Client ), NULL, "Unknown ID in prefix of SERVER", true);
 287                         return DISCONNECTED;
 288                 }
 289
 290                 /* Neue Client-Struktur anlegen */
 291                 c = Client_NewRemoteServer( Client, Req->argv[0], from, atoi( Req->argv[1] ), atoi( Req->argv[2] ), ptr, true);
 292                 if( ! c )
 293                 {
 294                         /* Neue Client-Struktur konnte nicht angelegt werden */
 295                         Log( LOG_ALERT, "Can't create client structure for server! (on connection %d)", Client_Conn( Client ));
 296                         Conn_Close( Client_Conn( Client ), NULL, "Can't allocate client structure for remote server", true);
 297                         return DISCONNECTED;
 298                 }
 299
 300                 /* Log-Meldung zusammenbauen und ausgeben */
 301                 if(( Client_Hops( c ) > 1 ) && ( Req->prefix[0] )) snprintf( str, sizeof( str ), "connected to %s, ", Client_ID( from ));
 302                 else strcpy( str, "" );
 303                 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": "" );
 304
 305                 /* Andere Server informieren */
 306                 IRC_WriteStrServersPrefix( Client, from, "SERVER %s %d %d :%s", Client_ID( c ), Client_Hops( c ) + 1, Client_MyToken( c ), Client_Info( c ));
 307
 308                 return CONNECTED;
 309         }
 310         else return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 311 } /* IRC_SERVER */
 312
 313
 314 GLOBAL bool
 315 IRC_NJOIN( CLIENT *Client, REQUEST *Req )
 316 {
 317         char nick_in[COMMAND_LEN], nick_out[COMMAND_LEN], *channame, *ptr, modes[8];
 318         bool is_op, is_voiced;
 319         CHANNEL *chan;
 320         CLIENT *c;
 321
 322         assert( Client != NULL );
 323         assert( Req != NULL );
 324
 325         /* Falsche Anzahl Parameter? */
 326         if( Req->argc != 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 327
 328         strlcpy( nick_in, Req->argv[1], sizeof( nick_in ));
 329         strcpy( nick_out, "" );
 330
 331         channame = Req->argv[0];
 332         ptr = strtok( nick_in, "," );
 333         while( ptr )
 334         {
 335                 is_op = is_voiced = false;
 336
 337                 /* Prefixe abschneiden */
 338                 while(( *ptr == '@' ) || ( *ptr == '+' ))
 339                 {
 340                         if( *ptr == '@' ) is_op = true;
 341                         if( *ptr == '+' ) is_voiced = true;
 342                         ptr++;
 343                 }
 344
 345                 c = Client_Search( ptr );
 346                 if( c )
 347                 {
 348                         Channel_Join( c, channame );
 349                         chan = Channel_Search( channame );
 350                         assert( chan != NULL );
 351
 352                         if( is_op ) Channel_UserModeAdd( chan, c, 'o' );
 353                         if( is_voiced ) Channel_UserModeAdd( chan, c, 'v' );
 354
 355                         /* im Channel bekannt machen */
 356                         IRC_WriteStrChannelPrefix( Client, chan, c, false, "JOIN :%s", channame );
 357
 358                         /* Channel-User-Modes setzen */
 359                         strlcpy( modes, Channel_UserModes( chan, c ), sizeof( modes ));
 360                         if( modes[0] )
 361                         {
 362                                 /* Modes im Channel bekannt machen */
 363                                 IRC_WriteStrChannelPrefix( Client, chan, Client, false, "MODE %s +%s %s", channame, modes, Client_ID( c ));
 364                         }
 365
 366                         if( nick_out[0] != '\0' ) strlcat( nick_out, ",", sizeof( nick_out ));
 367                         if( is_op ) strlcat( nick_out, "@", sizeof( nick_out ));
 368                         if( is_voiced ) strlcat( nick_out, "+", sizeof( nick_out ));
 369                         strlcat( nick_out, ptr, sizeof( nick_out ));
 370                 }
 371                 else Log( LOG_ERR, "Got NJOIN for unknown nick \"%s\" for channel \"%s\"!", ptr, channame );
 372
 373                 /* naechsten Nick suchen */
 374                 ptr = strtok( NULL, "," );
 375         }
 376
 377         /* an andere Server weiterleiten */
 378         if( nick_out[0] != '\0' ) IRC_WriteStrServersPrefix( Client, Client_ThisServer( ), "NJOIN %s :%s", Req->argv[0], nick_out );
 379
 380         return CONNECTED;
 381 } /* IRC_NJOIN */
 382
 383
 384 GLOBAL bool
 385 IRC_SQUIT( CLIENT *Client, REQUEST *Req )
 386 {
 387         CLIENT *target;
 388         char msg[LINE_LEN + 64];
 389
 390         assert( Client != NULL );
 391         assert( Req != NULL );
 392
 393         /* Falsche Anzahl Parameter? */
 394         if( Req->argc != 2 ) return IRC_WriteStrClient( Client, ERR_NEEDMOREPARAMS_MSG, Client_ID( Client ), Req->command );
 395
 396         Log( LOG_DEBUG, "Got SQUIT from %s for \"%s\": \"%s\" ...", Client_ID( Client ), Req->argv[0], Req->argv[1] );
 397
 398         target = Client_Search( Req->argv[0] );
 399         if( ! target )
 400         {
 401                 /* Den Server kennen wir nicht (mehr), also nichts zu tun. */
 402                 Log( LOG_WARNING, "Got SQUIT from %s for unknown server \"%s\"!?", Client_ID( Client ), Req->argv[0] );
 403                 return CONNECTED;
 404         }
 405
 406         if( Req->argv[1][0] )
 407         {
 408                 if( strlen( Req->argv[1] ) > LINE_LEN ) Req->argv[1][LINE_LEN] = '\0';
 409                 snprintf( msg, sizeof( msg ), "%s (SQUIT from %s).", Req->argv[1], Client_ID( Client ));
 410         }
 411         else snprintf( msg, sizeof( msg ), "Got SQUIT from %s.", Client_ID( Client ));
 412
 413         if( Client_Conn( target ) > NONE )
 414         {
 415                 /* dieser Server hat die Connection */
 416                 if( Req->argv[1][0] ) Conn_Close( Client_Conn( target ), msg, Req->argv[1], true);
 417                 else Conn_Close( Client_Conn( target ), msg, NULL, true);
 418                 return DISCONNECTED;
 419         }
 420         else
 421         {
 422                 /* Verbindung hielt anderer Server */
 423                 Client_Destroy( target, msg, Req->argv[1], false );
 424                 return CONNECTED;
 425         }
 426 } /* IRC_SQUIT */
 427
 428
 429 /* -eof- */