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Check for local links and empty gateways

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This commit is contained in:
Milos Gajdos 2019-10-23 19:48:26 +01:00
parent 776284b187
commit b67be88952
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GPG Key ID: 8B31058CC55DFD4F
1 changed files with 20 additions and 4 deletions
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24
network/default.go
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@ -304,6 +304,7 @@ func (n *network) acceptNetConn(l tunnel.Listener, recv chan *message) {
}
}
// updatePeerLinks updates link for a given peer
func (n *network) updatePeerLinks(peerAddr string, linkId string) error {
n.Lock()
defer n.Unlock()
@ -367,6 +368,7 @@ func (n *network) processNetChan(listener tunnel.Listener) {
lastSeen: now,
}
// update peer links
log.Debugf("Network updating peer link %s for peer: %s", m.session.Link(), pbNetConnect.Node.Address)
if err := n.updatePeerLinks(pbNetConnect.Node.Address, m.session.Link()); err != nil {
log.Debugf("Network failed updating peer links: %s", err)
}
@ -409,6 +411,7 @@ func (n *network) processNetChan(listener tunnel.Listener) {
lastSeen: now,
}
// update peer links
log.Debugf("Network updating peer link %s for peer: %s", m.session.Link(), pbNetPeer.Node.Address)
if err := n.updatePeerLinks(pbNetPeer.Node.Address, m.session.Link()); err != nil {
log.Debugf("Network failed updating peer links: %s", err)
}
@ -691,11 +694,22 @@ func (n *network) getHopCount(rtr string) int {
// getRouteMetric calculates router metric and returns it
// Route metric is calculated based on link status and route hopd count
func (n *network) getRouteMetric(router string, gateway string) int64 {
func (n *network) getRouteMetric(router string, gateway string, link string) int64 {
// set the route metric
n.RLock()
defer n.RUnlock()
if link == "local" && gateway == "" {
log.Debugf("Network link: %s, gateway: blank", link, gateway)
return 1
}
if link == "local" && gateway != "" {
log.Debugf("Network link: %s, gateway: %s", link, gateway)
return 2
}
log.Debugf("Network looking up %s link to gateway: %s", link, gateway)
if link, ok := n.peerLinks[gateway]; ok {
// maka sure delay is non-zero
delay := link.Delay()
@ -711,6 +725,7 @@ func (n *network) getRouteMetric(router string, gateway string) int64 {
}
return (delay * length * int64(hops)) / 10e9
}
log.Debugf("Network failed to find a link to gateway: %s", gateway)
return math.MaxInt64
}
@ -768,8 +783,9 @@ func (n *network) processCtrlChan(listener tunnel.Listener) {
}
// calculate route metric and add to the advertised metric
// we need to make sure we do not overflow math.MaxInt64
if metric := n.getRouteMetric(event.Route.Router, event.Route.Gateway); metric != math.MaxInt64 {
route.Metric += n.getRouteMetric(event.Route.Router, event.Route.Gateway)
log.Debugf("Network metric for router %s and gateway %s", event.Route.Router, event.Route.Gateway)
if metric := n.getRouteMetric(event.Route.Router, event.Route.Gateway, event.Route.Link); metric != math.MaxInt64 {
route.Metric += metric
} else {
route.Metric = metric
}
@ -843,7 +859,7 @@ func (n *network) advertise(advertChan <-chan *router.Advert) {
address = fmt.Sprintf("%d", hasher.Sum64())
}
// calculate route metric to advertise
metric := n.getRouteMetric(event.Route.Router, event.Route.Gateway)
metric := n.getRouteMetric(event.Route.Router, event.Route.Gateway, DefaultLink)
// NOTE: we override Gateway, Link and Address here
route := &pbRtr.Route{
Service: event.Route.Service,