/*

  route.c

  Author: Pekka Riikonen <priikone@poseidon.pspt.fi>

  Copyright (C) 2000 Pekka Riikonen

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.
  
  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

*/
/* 
 * Route cache routines. Server uses these to route packets to specific
 * routes. If route entry doesn't exist for a specific destination, server
 * uses primary route (default route).
 */
/*
 * $Id$
 * $Log$
 * Revision 1.1  2000/06/27 11:36:56  priikone
 * Initial revision
 *
 *
 */

#include "serverincludes.h"
#include "route.h"

/* Route cache hash table */
SilcServerRouteTable silc_route_cache[SILC_SERVER_ROUTE_SIZE];

/* Adds new route to the route cache. The argument `index' is the
   index value generated by silc_server_route_hash. */

void silc_server_route_add(unsigned int index, unsigned int dest,
			   SilcServerList *router)
{
  silc_route_cache[index].dest = dest;
  silc_route_cache[index].router = router;
}

/* Checksk whether destination has a specific router. Returns the
   router data if found, NULL otherwise. */

SilcServerList *silc_server_route_check(unsigned int dest, 
					unsigned short port)
{
  unsigned int index;

  index = silc_server_route_hash(dest, port);

  if (silc_route_cache[index].router != NULL &&
      silc_route_cache[index].dest == dest)
    return silc_route_cache[index].router;

  return NULL;
}