Method SetNetworkMap

wgengine/userspace.go:1294–1320

(nm *netmap.NetworkMap)

}

func (e *userspaceEngine) SetNetworkMap(nm *netmap.NetworkMap) {
	e.mu.Lock()
	e.netMap = nm
	tunGROKnobsChanged := false
	var curUDP, curTCP bool
	if buildfeatures.HasGRO && runtime.GOOS == "linux" && e.controlKnobs != nil {
		curUDP = e.controlKnobs.DisableTUNUDPGRO.Load()
		curTCP = e.controlKnobs.DisableTUNTCPGRO.Load()
		// Only act on transitions toward "disabled"; wireguard-go's GRO
		// disablement is sticky and cannot be reversed without restart.
		if (curUDP && !e.lastAppliedDisableTUNUDPGRO) ||
			(curTCP && !e.lastAppliedDisableTUNTCPGRO) {
			tunGROKnobsChanged = true
		}
		e.lastAppliedDisableTUNUDPGRO = curUDP
		e.lastAppliedDisableTUNTCPGRO = curTCP
	}
	e.mu.Unlock()
	if buildfeatures.HasGRO && tunGROKnobsChanged {
		e.logf("wgengine: TUN GRO knobs changed (DisableTUNUDPGRO=%v DisableTUNTCPGRO=%v); applying",
			curUDP, curTCP)
		e.tundev.ApplyGROKnobs(e.controlKnobs)
	}
	if e.networkLogger.Running() {
		e.networkLogger.ReconfigNetworkMap(nm)
	}
}

func (e *userspaceEngine) UpdateStatus(sb *ipnstate.StatusBuilder) {
	st, err := e.getStatus()