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- Da hatte ich mich wohl ein wenig verrannt; jetzt sollte der Resolver

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aber tatsaechlich funktionieren.
This commit is contained in:
Alexander Barton
2001-12-29 21:53:57 +00:00
parent 2c5da58d98
commit b9728ba2ea
1 changed files with 30 additions and 56 deletions
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86
src/ngircd/conn.c
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@@ -9,11 +9,15 @@
* Naehere Informationen entnehmen Sie bitter der Datei COPYING. Eine Liste * Naehere Informationen entnehmen Sie bitter der Datei COPYING. Eine Liste
* der an comBase beteiligten Autoren finden Sie in der Datei AUTHORS. * der an comBase beteiligten Autoren finden Sie in der Datei AUTHORS.
* *
* $Id: conn.c,v 1.18 2001/12/29 20:17:25 alex Exp $ * $Id: conn.c,v 1.19 2001/12/29 21:53:57 alex Exp $
* *
* connect.h: Verwaltung aller Netz-Verbindungen ("connections") * connect.h: Verwaltung aller Netz-Verbindungen ("connections")
* *
* $Log: conn.c,v $ * $Log: conn.c,v $
* Revision 1.19 2001/12/29 21:53:57 alex
* - Da hatte ich mich wohl ein wenig verrannt; jetzt sollte der Resolver
* aber tatsaechlich funktionieren.
*
* Revision 1.18 2001/12/29 20:17:25 alex * Revision 1.18 2001/12/29 20:17:25 alex
* - asyncronen Resolver (IP->Name) implementiert, dadurch div. Aenderungen. * - asyncronen Resolver (IP->Name) implementiert, dadurch div. Aenderungen.
* *
@@ -126,8 +130,7 @@
typedef struct _Res_Stat typedef struct _Res_Stat
{ {
INT pid; /* PID des Child-Prozess */ INT pid; /* PID des Child-Prozess */
INT out_pipe[2]; /* Pipe fuer IPC: zum Client */ INT pipe[2]; /* Pipe fuer IPC */
INT in_pipe[2]; /* Pipe fuer IPC: vom Client */
} RES_STAT; } RES_STAT;
@@ -156,9 +159,9 @@ LOCAL VOID Handle_Buffer( CONN_ID Idx );
LOCAL VOID Check_Connections( VOID ); LOCAL VOID Check_Connections( VOID );
LOCAL VOID Init_Conn_Struct( INT Idx ); LOCAL VOID Init_Conn_Struct( INT Idx );
LOCAL RES_STAT *Resolve( CHAR *Host ); LOCAL RES_STAT *Resolve( struct sockaddr_in *Addr );
LOCAL VOID Do_Resolve( INT r_fd, INT w_fd );
LOCAL VOID Read_Resolver_Result( INT r_fd ); LOCAL VOID Read_Resolver_Result( INT r_fd );
LOCAL VOID Do_Resolve( struct sockaddr_in *Addr, INT w_fd );
LOCAL fd_set My_Listeners; LOCAL fd_set My_Listeners;
@@ -451,11 +454,9 @@ GLOBAL VOID Conn_Close( CONN_ID Idx, CHAR *Msg )
if( My_Connections[Idx].res_stat ) if( My_Connections[Idx].res_stat )
{ {
/* Resolver-Strukturen freigeben, wenn noch nicht geschehen */ /* Resolver-Strukturen freigeben, wenn noch nicht geschehen */
FD_CLR( My_Connections[Idx].res_stat->in_pipe[0], &My_Resolvers ); FD_CLR( My_Connections[Idx].res_stat->pipe[0], &My_Resolvers );
close( My_Connections[Idx].res_stat->out_pipe[0] ); close( My_Connections[Idx].res_stat->pipe[0] );
close( My_Connections[Idx].res_stat->out_pipe[1] ); close( My_Connections[Idx].res_stat->pipe[1] );
close( My_Connections[Idx].res_stat->in_pipe[0] );
close( My_Connections[Idx].res_stat->in_pipe[1] );
free( My_Connections[Idx].res_stat ); free( My_Connections[Idx].res_stat );
} }
@@ -601,7 +602,7 @@ LOCAL VOID New_Connection( INT Sock )
Log( LOG_NOTICE, "Accepted connection %d from %s:%d on socket %d.", idx, inet_ntoa( new_addr.sin_addr ), ntohs( new_addr.sin_port), Sock ); Log( LOG_NOTICE, "Accepted connection %d from %s:%d on socket %d.", idx, inet_ntoa( new_addr.sin_addr ), ntohs( new_addr.sin_port), Sock );
/* Hostnamen ermitteln */ /* Hostnamen ermitteln */
s = Resolve( inet_ntoa( new_addr.sin_addr )); s = Resolve( &new_addr );
if( s ) if( s )
{ {
/* Sub-Prozess wurde asyncron gestartet */ /* Sub-Prozess wurde asyncron gestartet */
@@ -769,7 +770,7 @@ LOCAL VOID Init_Conn_Struct( INT Idx )
} /* Init_Conn_Struct */ } /* Init_Conn_Struct */
LOCAL RES_STAT *Resolve( CHAR *Host ) LOCAL RES_STAT *Resolve( struct sockaddr_in *Addr )
{ {
/* Hostnamen (asyncron!) aufloesen. Bei Fehler, z.B. wenn der /* Hostnamen (asyncron!) aufloesen. Bei Fehler, z.B. wenn der
* Child-Prozess nicht erzeugt werden kann, wird NULL geliefert. * Child-Prozess nicht erzeugt werden kann, wird NULL geliefert.
@@ -785,44 +786,28 @@ LOCAL RES_STAT *Resolve( CHAR *Host )
return NULL; return NULL;
} }
if( pipe( s->out_pipe ) != 0 ) if( pipe( s->pipe ) != 0 )
{ {
free( s ); free( s );
Log( LOG_ALERT, "Resolver: Can't create output pipe: %s!", strerror( errno )); Log( LOG_ALERT, "Resolver: Can't create output pipe: %s!", strerror( errno ));
return NULL; 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( ); pid = fork( );
if( pid > 0 ) if( pid > 0 )
{ {
/* Haupt-Prozess */ /* Haupt-Prozess */
if( write( s->out_pipe[1], Host, strlen( Host ) + 1 ) != ( strlen( Host ) + 1 )) Log( LOG_DEBUG, "Resolver process for %s (PID %d) created.", inet_ntoa( Addr->sin_addr ), pid );
{ FD_SET( s->pipe[0], &My_Resolvers );
free( s ); if( s->pipe[0] > My_Max_Fd ) My_Max_Fd = s->pipe[0];
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; s->pid = pid;
Log( LOG_DEBUG, "Resolver process for \"%s\" (PID %d) created.", Host, pid );
return s; return s;
} }
else if( pid == 0 ) else if( pid == 0 )
{ {
/* Sub-Prozess */ /* Sub-Prozess */
Log_Init_Resolver( ); Log_Init_Resolver( );
Do_Resolve( s->out_pipe[0], s->in_pipe[1] ); Do_Resolve( Addr, s->pipe[1] );
Log_Exit_Resolver( ); Log_Exit_Resolver( );
exit( 0 ); exit( 0 );
} }
@@ -859,7 +844,7 @@ LOCAL VOID Read_Resolver_Result( INT r_fd )
for( i = 0; i < MAX_CONNECTIONS; i++ ) for( i = 0; i < MAX_CONNECTIONS; i++ )
{ {
/* zugehoerige Connection suchen */ /* 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(( My_Connections[i].sock >= 0 ) && ( My_Connections[i].res_stat ) && ( My_Connections[i].res_stat->pipe[0] == r_fd )) break;
} }
if( i >= MAX_CONNECTIONS ) if( i >= MAX_CONNECTIONS )
@@ -871,10 +856,8 @@ LOCAL VOID Read_Resolver_Result( INT r_fd )
} }
/* Aufraeumen */ /* Aufraeumen */
close( My_Connections[i].res_stat->out_pipe[0] ); close( My_Connections[i].res_stat->pipe[0] );
close( My_Connections[i].res_stat->out_pipe[1] ); close( My_Connections[i].res_stat->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 ); free( My_Connections[i].res_stat );
My_Connections[i].res_stat = NULL; My_Connections[i].res_stat = NULL;
@@ -889,43 +872,34 @@ LOCAL VOID Read_Resolver_Result( INT r_fd )
} /* Read_Resolver_Result */ } /* Read_Resolver_Result */
LOCAL VOID Do_Resolve( INT r_fd, INT w_fd ) LOCAL VOID Do_Resolve( struct sockaddr_in *Addr, INT w_fd )
{ {
/* Resolver Sub-Prozess: aufzuloesenden Namen aus /* Resolver Sub-Prozess: aufzuloesenden Namen aus
* der Pipe lesen, Ergebnis in Pipe schreiben. */ * der Pipe lesen, Ergebnis in Pipe schreiben. */
CHAR host[HOST_LEN], res_host[HOST_LEN]; CHAR hostname[HOST_LEN];
struct hostent *h; struct hostent *h;
/* Anfrage vom Parent lesen */ Log_Resolver( LOG_DEBUG, "Now resolving %s ...", inet_ntoa( Addr->sin_addr ));
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 */ /* Namen aufloesen */
h = gethostbyname( host ); h = gethostbyaddr( (CHAR *)&Addr->sin_addr, sizeof( Addr->sin_addr ), AF_INET );
if( h ) strcpy( res_host, h->h_name ); if( h ) strcpy( hostname, h->h_name );
else else
{ {
Log_Resolver( LOG_WARNING, "Can't resolce host name (code %d)!", h_errno ); Log_Resolver( LOG_WARNING, "Can't resolce host name (code %d)!", h_errno );
strcpy( res_host, host ); strcpy( hostname, inet_ntoa( Addr->sin_addr ));
} }
/* Antwort an Parent schreiben */ /* Antwort an Parent schreiben */
if( write( w_fd, res_host, strlen( res_host ) + 1 ) != ( strlen( res_host ) + 1 )) if( write( w_fd, hostname, strlen( hostname ) + 1 ) != ( strlen( hostname ) + 1 ))
{ {
Log_Resolver( LOG_ALERT, "Resolver: Can't write to parent: %s!", strerror( errno )); Log_Resolver( LOG_ALERT, "Resolver: Can't write to parent: %s!", strerror( errno ));
close( r_fd ); close( w_fd ); close( w_fd );
return; return;
} }
Log_Resolver( LOG_DEBUG, "Ok, translated \"%s\" to \"%s\".", host, res_host ); Log_Resolver( LOG_DEBUG, "Ok, translated %s to \"%s\".", inet_ntoa( Addr->sin_addr ), hostname );
} /* Do_Resolve */ } /* Do_Resolve */