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Unlock the hostmap quickly, lock hostinfo instead (#459)

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Nate Brown 2021-05-05 13:10:55 -05:00 committed by GitHub
parent 95f4c8a01b
commit d004fae4f9
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 8 additions and 11 deletions
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17
hostmap.go
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@ -313,24 +313,17 @@ func (hm *HostMap) PromoteBestQueryVpnIP(vpnIp uint32, ifce *Interface) (*HostIn
func (hm *HostMap) queryVpnIP(vpnIp uint32, promoteIfce *Interface) (*HostInfo, error) {
hm.RLock()
if h, ok := hm.Hosts[vpnIp]; ok {
hm.RUnlock()
// Do not attempt promotion if you are a lighthouse
if promoteIfce != nil && !promoteIfce.lightHouse.amLighthouse {
h.TryPromoteBest(hm.preferredRanges, promoteIfce)
}
hm.RUnlock()
return h, nil
} else {
//return &net.UDPAddr{}, nil, errors.New("Unable to find host")
}
hm.RUnlock()
/*
if lightHouse != nil {
lightHouse.Query(vpnIp)
return nil, errors.New("Unable to find host")
}
*/
return nil, errors.New("unable to find host")
}
}
func (hm *HostMap) queryUnsafeRoute(ip uint32) uint32 {
@ -415,6 +408,10 @@ func (i *HostInfo) BindConnectionState(cs *ConnectionState) {
func (i *HostInfo) TryPromoteBest(preferredRanges []*net.IPNet, ifce *Interface) {
c := atomic.AddUint32(&i.promoteCounter, 1)
if c%PromoteEvery == 0 {
// The lock here is currently protecting i.remote access
i.RLock()
defer i.RUnlock()
// return early if we are already on a preferred remote
rIP := i.remote.IP
for _, l := range preferredRanges {