#include "route.h"
#include "utils.h"
-bool decrement_ttl = false;
-
static bool checklength(node_t *source, vpn_packet_t *packet, uint16_t length) {
+ assert(length);
+
if(packet->len < length) {
- logger(source->mesh, MESHLINK_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(meshlink_handle_t *mesh, node_t *source, vpn_packet_t *packet) {
+ assert(source);
+
// TODO: route on name or key
- node_t *owner = NULL;
- node_t *via = NULL;
meshlink_packethdr_t *hdr = (meshlink_packethdr_t *) packet->data;
- owner = lookup_node(mesh, (char *)hdr->destination);
+ 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 Lenght
- if(!checklength(source, packet, sizeof(*hdr)))
+ //Check Length
+ if(!checklength(source, packet, sizeof(*hdr))) {
return;
+ }
- if(owner == NULL) {
+ if(dest == NULL) {
//Lookup failed
- logger(mesh, MESHLINK_WARNING, "Cant lookup the owner of a packet in the route() function. This should never happen!\n");
+ 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(owner == mesh->self) {
+ 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
+
+ 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)
+ if(mesh->receive_cb) {
mesh->receive_cb(mesh, (meshlink_node_t *)source, payload, len);
+ }
+
return;
}
- if(!owner->status.reachable) {
+ if(!dest->status.reachable) {
//TODO: check what to do here, not just print a warning
- logger(mesh, MESHLINK_WARNING, "The owner of a packet in the route() function is unreachable. Dropping packet.\n");
+ logger(mesh, MESHLINK_WARNING, "The destination of a packet in the route() function is unreachable. Dropping packet.\n");
return;
}
- via = (owner->via == mesh->self) ? owner->nexthop : owner->via;
- if(via == source) {
- logger(mesh, MESHLINK_ERROR, "Routing loop for packet from %s (%s)!", source->name, source->hostname);
+ if(dest == source) {
+ logger(mesh, MESHLINK_ERROR, "Routing loop for packet from %s!", source->name);
return;
}
- send_packet(mesh, owner, packet);
+ send_packet(mesh, dest, packet);
return;
}