- route.c will contain the routing logic.

src/route.c

@@ -0,0 +1,88 @@
+/*
+    route.c -- routing
+    Copyright (C) 2000 Ivo Timmermans <itimmermans@bigfoot.com>,
+                  2000 Guus Sliepen <guus@sliepen.warande.net>
+
+    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.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+    $Id: route.c,v 1.1.2.1 2000/10/23 13:52:54 guus Exp $
+*/
+
+#include "config.h"
+
+#include <utils.h>
+#include <xalloc.h>
+
+#include "net.h"
+#include "connlist.h"
+
+#include "system.h"
+
+int routing_mode = 0;	/* Will be used to determine if we route by MAC or by payload's protocol */
+
+conn_list_t *route_packet(vpn_packet_t *packet)
+{
+  unsigned short type;
+cp
+  type = ntohs(*((unsigned short*)(&packet.data[12])))
+
+  switch(type)
+    {
+      case 0x0800:
+        return route_ipv4(packet);
+      case 0x86DD:
+        return route_ipv6(packet);
+/*
+      case 0x8137:
+        return route_ipx(packet);
+      case 0x0806:
+        return route_arp(packet);
+*/
+      default:
+        /* TODO: try MAC as last resort? */
+        if(debug_lvl >= DEBUG_TRAFFIC)
+          {
+            syslog(LOG_WARNING, _("Cannot route packet: unknown type %hx"), type);
+          }
+            return NULL;
+     }
+}
+
+conn_list_t *route_ipv4(vpn_packet_t *packet)
+{
+  ipv4_t dest;
+  conn_list_t *cl;
+cp
+  dest = ntohl(*((unsigned long*)(&packet.data[30]);
+  
+  cl = lookup_conn_list_ipv4(dest);
+  if(!cl)
+    if(debug_lvl >= DEBUG_TRAFFIC)
+      {
+        syslog(LOG_WARNING, _("Cannot route packet: unknown destination address %d.%d.%d.%d"),
+               packet.data[30], packet.data[31], packet.data[32], packet.data[33]);
+      } 
+  
+  return cl;  
+cp
+}
+
+conn_list_t *route_ipv6(vpn_packet_t *packet)
+{
+cp
+  syslog(LOG_WARNING, _("Cannot route packet: IPv6 routing not implemented yet"));
+  return NULL;
+cp
+}