89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
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/*
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route.c -- routing
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Copyright (C) 2000 Ivo Timmermans <itimmermans@bigfoot.com>,
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2000 Guus Sliepen <guus@sliepen.warande.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id: route.c,v 1.1.2.1 2000/10/23 13:52:54 guus Exp $
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*/
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#include "config.h"
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#include <utils.h>
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#include <xalloc.h>
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#include "net.h"
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#include "connlist.h"
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#include "system.h"
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int routing_mode = 0; /* Will be used to determine if we route by MAC or by payload's protocol */
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conn_list_t *route_packet(vpn_packet_t *packet)
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{
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unsigned short type;
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cp
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type = ntohs(*((unsigned short*)(&packet.data[12])))
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switch(type)
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{
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case 0x0800:
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return route_ipv4(packet);
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case 0x86DD:
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return route_ipv6(packet);
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/*
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case 0x8137:
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return route_ipx(packet);
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case 0x0806:
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return route_arp(packet);
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*/
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default:
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/* TODO: try MAC as last resort? */
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if(debug_lvl >= DEBUG_TRAFFIC)
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{
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syslog(LOG_WARNING, _("Cannot route packet: unknown type %hx"), type);
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}
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return NULL;
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}
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}
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conn_list_t *route_ipv4(vpn_packet_t *packet)
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{
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ipv4_t dest;
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conn_list_t *cl;
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cp
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dest = ntohl(*((unsigned long*)(&packet.data[30]);
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cl = lookup_conn_list_ipv4(dest);
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if(!cl)
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if(debug_lvl >= DEBUG_TRAFFIC)
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{
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syslog(LOG_WARNING, _("Cannot route packet: unknown destination address %d.%d.%d.%d"),
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packet.data[30], packet.data[31], packet.data[32], packet.data[33]);
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}
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return cl;
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cp
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}
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conn_list_t *route_ipv6(vpn_packet_t *packet)
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{
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cp
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syslog(LOG_WARNING, _("Cannot route packet: IPv6 routing not implemented yet"));
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return NULL;
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cp
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}
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