+LOCAL VOID Init_Conn_Struct( INT Idx )
+{
+ /* Connection-Struktur initialisieren */
+
+ My_Connections[Idx].sock = NONE;
+ My_Connections[Idx].res_stat = NULL;
+ My_Connections[Idx].host[0] = '\0';
+ My_Connections[Idx].rbuf[0] = '\0';
+ My_Connections[Idx].rdatalen = 0;
+ My_Connections[Idx].wbuf[0] = '\0';
+ My_Connections[Idx].wdatalen = 0;
+ My_Connections[Idx].lastdata = time( NULL );
+ My_Connections[Idx].lastping = 0;
+} /* Init_Conn_Struct */
+
+
+LOCAL RES_STAT *Resolve( CHAR *Host )
+{
+ /* Hostnamen (asyncron!) aufloesen. Bei Fehler, z.B. wenn der
+ * Child-Prozess nicht erzeugt werden kann, wird NULL geliefert.
+ * Der Host kann dann nicht aufgeloest werden. */
+
+ RES_STAT *s;
+ INT pid;
+
+ s = malloc( sizeof( RES_STAT ));
+ if( ! s )
+ {
+ Log( LOG_ALERT, "Resolver: Can't alloc memory!" );
+ return NULL;
+ }
+
+ if( pipe( s->out_pipe ) != 0 )
+ {
+ free( s );
+ Log( LOG_ALERT, "Resolver: Can't create output pipe: %s!", strerror( errno ));
+ return NULL;
+ }
+
+ if( pipe( s->in_pipe ) != 0 )
+ {
+ free( s );
+ Log( LOG_ALERT, "Resolver: Can't create input pipe: %s!", strerror( errno ));
+ return NULL;
+ }
+
+ pid = fork( );
+ if( pid > 0 )
+ {
+ /* Haupt-Prozess */
+ if( write( s->out_pipe[1], Host, strlen( Host ) + 1 ) != ( strlen( Host ) + 1 ))
+ {
+ free( s );
+ Log( LOG_ALERT, "Resolver: Can't write to child: %s!", strerror( errno ));
+ return NULL;
+ }
+
+ FD_SET( s->in_pipe[0], &My_Resolvers );
+ if( s->in_pipe[0] > My_Max_Fd ) My_Max_Fd = s->in_pipe[0];
+
+ s->pid = pid;
+
+ Log( LOG_DEBUG, "Resolver process for \"%s\" (PID %d) created.", Host, pid );
+ return s;
+ }
+ else if( pid == 0 )
+ {
+ /* Sub-Prozess */
+ Log_Init_Resolver( );
+ Do_Resolve( s->out_pipe[0], s->in_pipe[1] );
+ Log_Exit_Resolver( );
+ exit( 0 );
+ }
+ else
+ {
+ /* Fehler */
+ free( s );
+ Log( LOG_ALERT, "Resolver: Can't fork: %s!", strerror( errno ));
+ return NULL;
+ }
+} /* Resolve */
+
+
+LOCAL VOID Read_Resolver_Result( INT r_fd )
+{
+ /* Ergebnis von Resolver Sub-Prozess aus Pipe lesen
+ * und entsprechende Connection aktualisieren */
+
+ CHAR hostname[HOST_LEN];
+ CLIENT *c;
+ INT i;
+
+ FD_CLR( r_fd, &My_Resolvers );
+
+ /* Anfrage vom Parent lesen */
+ if( read( r_fd, hostname, HOST_LEN) < 0 )
+ {
+ /* Fehler beim Lesen aus der Pipe */
+ close( r_fd );
+ Log( LOG_ALERT, "Resolver: Can't read result: %s!", strerror( errno ));
+ return;
+ }
+
+ for( i = 0; i < MAX_CONNECTIONS; i++ )
+ {
+ /* zugehoerige Connection suchen */
+ if(( My_Connections[i].sock >= 0 ) && ( My_Connections[i].res_stat ) && ( My_Connections[i].res_stat->in_pipe[0] == r_fd )) break;
+ }
+
+ if( i >= MAX_CONNECTIONS )
+ {
+ /* Opsa! Keine passende Connection gefunden!? */
+ close( r_fd );
+ Log( LOG_ALERT, "Resolver: Got result for unknown connection!?" );
+ return;
+ }
+
+ /* Aufraeumen */
+ close( My_Connections[i].res_stat->out_pipe[0] );
+ close( My_Connections[i].res_stat->out_pipe[1] );
+ close( My_Connections[i].res_stat->in_pipe[0] );
+ close( My_Connections[i].res_stat->in_pipe[1] );
+ free( My_Connections[i].res_stat );
+ My_Connections[i].res_stat = NULL;
+
+ /* Hostnamen setzen */
+ strcpy( My_Connections[i].host, hostname );
+ c = Client_GetFromConn( i );
+ if( c )
+ {
+ Log( LOG_DEBUG, "Set hostname: \"%s\".", hostname );
+ Client_SetHostname( c, hostname );
+ }
+} /* Read_Resolver_Result */
+
+
+LOCAL VOID Do_Resolve( INT r_fd, INT w_fd )
+{
+ /* Resolver Sub-Prozess: aufzuloesenden Namen aus
+ * der Pipe lesen, Ergebnis in Pipe schreiben. */
+
+ CHAR host[HOST_LEN], res_host[HOST_LEN];
+ struct hostent *h;
+
+ /* Anfrage vom Parent lesen */
+ if( read( r_fd, host, HOST_LEN) < 0 )
+ {
+ Log_Resolver( LOG_ALERT, "Resolver: Can't read from parent: %s!", strerror( errno ));
+ close( r_fd ); close( w_fd );
+ return;
+ }
+ host[HOST_LEN] = '\0';
+
+ Log_Resolver( LOG_DEBUG, "Now resolving \"%s\" ...", host );
+
+ /* Namen aufloesen */
+ h = gethostbyname( host );
+ if( h ) strcpy( res_host, h->h_name );
+ else
+ {
+ Log_Resolver( LOG_WARNING, "Can't resolce host name (code %d)!", h_errno );
+ strcpy( res_host, host );
+ }
+
+ /* Antwort an Parent schreiben */
+ if( write( w_fd, res_host, strlen( res_host ) + 1 ) != ( strlen( res_host ) + 1 ))
+ {
+ Log_Resolver( LOG_ALERT, "Resolver: Can't write to parent: %s!", strerror( errno ));
+ close( r_fd ); close( w_fd );
+ return;
+ }
+
+ Log_Resolver( LOG_DEBUG, "Ok, translated \"%s\" to \"%s\".", host, res_host );
+} /* Do_Resolve */
+
+