Merge pull request #708 from milosgajdos83/route-metric

Set the route.Metric before updating routing table
This commit is contained in:
Asim Aslam 2019-08-29 12:28:43 +01:00 committed by GitHub
commit b3aef71fdb
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23

View File

@ -376,7 +376,43 @@ func (n *network) acceptCtrlConn(l tunnel.Listener, recv chan *transport.Message
}
}
// process processes network advertisements
// setRouteMetric calculates metric of the route and updates it in place
// - Local route metric is 1
// - Routes with ID of adjacent neighbour are 10
// - Routes of neighbours of the advertiser are 100
// - Routes beyond your neighbourhood are 1000
func (n *network) setRouteMetric(route *router.Route) {
// we are the origin of the route
if route.Router == n.options.Id {
route.Metric = 1
return
}
n.RLock()
// check if the route origin is our neighbour
if _, ok := n.neighbours[route.Router]; ok {
route.Metric = 10
n.RUnlock()
return
}
// check if the route origin is the neighbour of our neighbour
for _, node := range n.neighbours {
for id, _ := range node.neighbours {
if route.Router == id {
route.Metric = 100
n.RUnlock()
return
}
}
}
n.RUnlock()
// the origin of the route is beyond our neighbourhood
route.Metric = 1000
}
// processCtrlChan processes messages received on ControlChannel
func (n *network) processCtrlChan(l tunnel.Listener) {
// receive control message queue
recv := make(chan *transport.Message, 128)
@ -406,6 +442,13 @@ func (n *network) processCtrlChan(l tunnel.Listener) {
Link: event.Route.Link,
Metric: int(event.Route.Metric),
}
// set the route metric
n.setRouteMetric(&route)
// throw away metric bigger than 1000
if route.Metric > 1000 {
continue
}
// create router event
e := &router.Event{
Type: router.EventType(event.Type),
Timestamp: time.Unix(0, pbRtrAdvert.Timestamp),