/*
route.c -- routing
- Copyright (C) 2000-2005 Ivo Timmermans,
- 2000-2013 Guus Sliepen <guus@tinc-vpn.org>
+ 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
#include "system.h"
#include "logger.h"
+#include "meshlink_internal.h"
#include "net.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;
-bool overwrite_mac = false;
-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;
-}
+static bool checklength(node_t *source, vpn_packet_t *packet, uint16_t length) {
+ assert(length);
-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);
+ logger(source->mesh, MESHLINK_WARNING, "Got too short packet from %s", source->name);
return false;
- } else
+ } else {
return true;
+ }
}
-void route(node_t *source,vpn_packet_t *packet) {
- // TODO: route on name or key
-
- 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;
- }
-
- 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;
- }
-
- 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;
- }
-
- //TODO: I skipped here a lot of checks !
-
- send_packet(owner,packet);
- return;
+void route(meshlink_handle_t *mesh, node_t *source, vpn_packet_t *packet) {
+ assert(source);
+
+ // TODO: route on name or key
+
+ meshlink_packethdr_t *hdr = (meshlink_packethdr_t *) packet->data;
+ node_t *dest = lookup_node(mesh, (char *)hdr->destination);
+ logger(mesh, MESHLINK_DEBUG, "Routing packet from \"%s\" to \"%s\"\n", hdr->source, hdr->destination);
+
+ //Check Length
+ if(!checklength(source, packet, sizeof(*hdr))) {
+ return;
+ }
+
+ if(dest == NULL) {
+ //Lookup failed
+ logger(mesh, MESHLINK_WARNING, "Can't lookup the destination of a packet in the route() function. This should never happen!\n");
+ logger(mesh, MESHLINK_WARNING, "Destination was: %s\n", hdr->destination);
+ return;
+ }
+
+ if(dest == mesh->self) {
+ const void *payload = packet->data + sizeof(*hdr);
+ size_t len = packet->len - sizeof(*hdr);
+
+ char hex[len * 2 + 1];
+
+ if(mesh->log_level <= MESHLINK_DEBUG) {
+ bin2hex(payload, hex, len); // don't do this unless it's going to be logged
+ }
+
+ logger(mesh, MESHLINK_DEBUG, "I received a packet for me with payload: %s\n", hex);
+
+ if(mesh->receive_cb) {
+ mesh->receive_cb(mesh, (meshlink_node_t *)source, payload, len);
+ }
+
+ return;
+ }
+
+ if(!dest->status.reachable) {
+ //TODO: check what to do here, not just print a warning
+ logger(mesh, MESHLINK_WARNING, "The destination of a packet in the route() function is unreachable. Dropping packet.\n");
+ return;
+ }
+
+ if(dest == source) {
+ logger(mesh, MESHLINK_ERROR, "Routing loop for packet from %s!", source->name);
+ return;
+ }
+
+ send_packet(mesh, dest, packet);
+ return;
}