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wgengine/netstack: reduce calls to netstack AddAddress

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Signed-off-by: Naman Sood <mail@nsood.in>
This commit is contained in:
Naman Sood 2021-03-29 13:34:00 -04:00
parent a506310744
commit 4c22967a81
1 changed files with 5 additions and 1 deletions
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6
wgengine/netstack/netstack.go
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@ -189,14 +189,18 @@ func (ns *Impl) updateDNS(nm *netmap.NetworkMap) {
func (ns *Impl) addSubnetAddress(pn tcpip.NetworkProtocolNumber, ip netaddr.IP) {
ns.mu.Lock()
ns.connsOpenBySubnetIP[ip]++
// Only register address into netstack for first concurrent connection.
if ns.connsOpenBySubnetIP[ip] == 1 {
ns.ipstack.AddAddress(nicID, pn, tcpip.Address(ip.IPAddr().IP))
}
ns.mu.Unlock()
ns.ipstack.AddAddress(nicID, pn, tcpip.Address(ip.IPAddr().IP))
}
func (ns *Impl) removeSubnetAddress(ip netaddr.IP) {
ns.mu.Lock()
defer ns.mu.Unlock()
ns.connsOpenBySubnetIP[ip]--
// Only unregister address from netstack after last concurrent connection.
if ns.connsOpenBySubnetIP[ip] == 0 {
ns.ipstack.RemoveAddress(nicID, tcpip.Address(ip.IPAddr().IP))
delete(ns.connsOpenBySubnetIP, ip)