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fix natManager to close natManager.nat #1468

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merged 3 commits into from
Jun 15, 2022
Merged

fix natManager to close natManager.nat #1468

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866ef71
rename natManager.natnatmu to follow the standard
watjurk Apr 27, 2022
4c78e85
fix natManager to close natManager.nat
watjurk Apr 27, 2022
2891640
natmgr: move close to defer in background
watjurk Jun 6, 2022
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18 changes: 13 additions & 5 deletions p2p/host/basic/natmgr.go
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Original file line number Diff line number Diff line change
Expand Up @@ -37,7 +37,7 @@ func NewNATManager(net network.Network) NATManager {
// * closing the natManager closes the nat and its mappings.
type natManager struct {
net network.Network
natmu sync.RWMutex
natMx sync.RWMutex
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nat *inat.NAT

ready chan struct{} // closed once the nat is ready to process port mappings
Expand Down Expand Up @@ -77,6 +77,14 @@ func (nmgr *natManager) Ready() <-chan struct{} {
func (nmgr *natManager) background(ctx context.Context) {
defer nmgr.refCount.Done()

defer func() {
nmgr.natMx.Lock()
if nmgr.nat != nil {
nmgr.nat.Close()
}
nmgr.natMx.Unlock()
}()

discoverCtx, cancel := context.WithTimeout(ctx, 10*time.Second)
defer cancel()
natInstance, err := inat.DiscoverNAT(discoverCtx)
Expand All @@ -86,9 +94,9 @@ func (nmgr *natManager) background(ctx context.Context) {
return
}

nmgr.natmu.Lock()
nmgr.natMx.Lock()
nmgr.nat = natInstance
nmgr.natmu.Unlock()
nmgr.natMx.Unlock()
close(nmgr.ready)

// sign natManager up for network notifications
Expand Down Expand Up @@ -207,8 +215,8 @@ func (nmgr *natManager) doSync() {
// (a) the search process is still ongoing, or (b) the search process
// found no nat. Clients must check whether the return value is nil.
func (nmgr *natManager) NAT() *inat.NAT {
nmgr.natmu.Lock()
defer nmgr.natmu.Unlock()
nmgr.natMx.Lock()
defer nmgr.natMx.Unlock()
return nmgr.nat
}

Expand Down