[Dhcp-agent-commits] CVS: dhcp-agent dhcp-route.c,NONE,1.1

[Thamer Al-H. <act...@us...>]

Update of /cvsroot/dhcp-agent/dhcp-agent
In directory usw-pr-cvs1:/tmp/cvs-serv24213

Added Files:
	dhcp-route.c 
Log Message:
forgot to add the new route code

--- NEW FILE: dhcp-route.c ---
/* $Header: /cvsroot/dhcp-agent/dhcp-agent/dhcp-route.c,v 1.1 2002/05/19 18:47:23 actmodern Exp $
 *
 * Copyright 2001 Thamer Alharbash <tm...@wh...>
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in
 * the documentation and/or other materials provided with the
 * distribution.
 * 3. The names of the authors may not be used to endorse or promote
 * products derived from this software without specific prior
 * written permission.
 * 
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Routing manipulation:
 *
 * Here we can add/delete routes, and lookup routes.  We return
 * mac addresses so packets can be sent out to the right MAC
 * address.
 * 
 */

#include <dhcp-agent.h>

int route_find(rawnet_t *net, ip_addr_t addr, eth_addr_t *dest_mac)
{
    route_t *rt;
    struct route_entry entry;

    rt = route_open();
    if(rt == NULL) {
        fatal_error("could not open routing table: %s", strerror(errno));
        exit(1);
    }

    memset(&entry.route_dst, 0, sizeof(entry.route_dst));
    memset(&entry.route_gw, 0, sizeof(entry.route_gw));

    entry.route_dst.addr_type = ADDR_TYPE_IP;
    entry.route_dst.addr_bits = 0;
    entry.route_dst.addr_ip = addr;

    if(route_get(rt, &entry)) {
        /* not in routing table. do an arp for it then. */
        return(arp_discover_hardware_address(net, 3, entry.route_dst.addr_ip, dest_mac));
    }

    route_close(rt);

    /* arp for gateway address. */
    return(arp_discover_hardware_address(net, 3, entry.route_gw.addr_ip, dest_mac));
}