/*
route.c -- routing
- Copyright (C) 2000 Ivo Timmermans <itimmermans@bigfoot.com>,
- 2000 Guus Sliepen <guus@sliepen.warande.net>
+ Copyright (C) 2014 Guus Sliepen <guus@meshlink.io>
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
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 1.1.2.4 2001/01/05 23:53:53 guus Exp $
+ 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.,
+ 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#include "config.h"
-
-#include <utils.h>
-#include <xalloc.h>
-#include <syslog.h>
+#include "system.h"
+#include "logger.h"
#include "net.h"
-#include "connection.h"
-#include "subnet.h"
#include "route.h"
+#include "utils.h"
+#include "libmeshlink.h"
+
+rmode_t routing_mode = RMODE_ROUTER;
+fmode_t forwarding_mode = FMODE_INTERNAL;
+bmode_t broadcast_mode = BMODE_MST;
+bool decrement_ttl = false;
+bool directonly = false;
+bool priorityinheritance = false;
+int macexpire = 600;
+mac_t mymac = {{0xFE, 0xFD, 0, 0, 0, 0}};
+bool pcap = false;
+
+static bool ratelimit(int frequency) {
+ static time_t lasttime = 0;
+ static int count = 0;
+
+ if(lasttime == now.tv_sec) {
+ if(count >= frequency)
+ return true;
+ } else {
+ lasttime = now.tv_sec;
+ count = 0;
+ }
+
+ count++;
+ return false;
+}
-#include "system.h"
+static bool checklength(node_t *source, vpn_packet_t *packet, length_t length) {
+ if(packet->len < length) {
+ logger(DEBUG_TRAFFIC, LOG_WARNING, "Got too short packet from %s (%s)", source->name, source->hostname);
+ return false;
+ } else
+ return true;
+}
+
+void route(node_t *source,vpn_packet_t *packet) {
+ // TODO: route on name or key
-int routing_mode = RMODE_ROUTER; /* Will be used to determine if we route by MAC or by payload's protocol */
-
-connection_t *route_mac(connection_t *source, vpn_packet_t *packet)
-{
- connection_t *oldsrc, *dst;
- subnet_t *subnet;
-cp
- /* Learn source address */
-
- oldsrc = lookup_subnet_mac((mac_t *)(&packet->data[0]))->owner;
-
- if(!oldsrc)
- {
- subnet = new_subnet();
- subnet->type = SUBNET_MAC;
- memcpy(&subnet->net.mac.address, (mac_t *)(&packet->data[0]), sizeof(mac_t));
- subnet_add(source, subnet);
+ node_t* owner = NULL;
+ tincpackethdr* hdr = (tincpackethdr*)packet->data;
+ owner = lookup_node(hdr->destination);
+ if (owner == NULL) {
+ //Lookup failed
+ logger(DEBUG_TRAFFIC, LOG_WARNING, "Cant lookup the owner of a packet in the route() function. This should never happen \n");
+ return;
}
- /* FIXME: do ageing and roaming */
-
- /* Lookup destination address */
-
- dst = lookup_subnet_mac((mac_t *)(&packet->data[6]))->owner;
-
- if(!dst)
- if(debug_lvl >= DEBUG_TRAFFIC)
- {
- syslog(LOG_WARNING, _("Cannot route packet: unknown destination address %x:%x:%x:%x:%x:%x"),
- packet->data[6],
- packet->data[7],
- packet->data[8],
- packet->data[9],
- packet->data[10],
- packet->data[11]);
- }
-cp
- return dst;
-}
+ if (owner == myself ) {
+ //TODO: implement sending received data from meshlink library to the application
+ logger(DEBUG_TRAFFIC, LOG_WARNING, "I received a packet for me with payload: %s \n", packet->data + 46);
+ return;
+ }
-connection_t *route_ipv4(vpn_packet_t *packet)
-{
- ipv4_t dest;
- connection_t *cl;
-cp
- dest = ntohl(*((unsigned long*)(&packet->data[30])));
-
- cl = lookup_subnet_ipv4(&dest)->owner;
- 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]);
- }
-cp
- return cl;
-}
+ if(!owner->status.reachable) {
+ //TODO: check what to do here, not just print a warning
+ logger(DEBUG_TRAFFIC, LOG_WARNING, "The owner of a packet in the route() function is unreachable. Dropping packet. \n");
+ return;
+ }
-connection_t *route_ipv6(vpn_packet_t *packet)
-{
-cp
- if(debug_lvl > DEBUG_NOTHING)
- {
- syslog(LOG_WARNING, _("Cannot route packet: IPv6 routing not implemented yet"));
- }
-cp
- return NULL;
-}
+ //TODO: I skipped here a lot of checks !
-connection_t *route_packet(connection_t *source, vpn_packet_t *packet)
-{
- unsigned short int type;
-cp
- /* FIXME: multicast? */
-
- switch(routing_mode)
- {
- case RMODE_HUB:
- return broadcast;
-
- case RMODE_SWITCH:
- return route_mac(source, packet);
-
- case RMODE_ROUTER:
- 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:
- if(debug_lvl >= DEBUG_TRAFFIC)
- {
- syslog(LOG_WARNING, _("Cannot route packet: unknown type %hx"), type);
- }
- return NULL;
- }
- }
+ send_packet(owner,packet);
+ return;
}