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Extract function getCurrentNATType()

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Adopted the change in according to the recommendation from

https://gitlab.torproject.org/tpo/anti-censorship/pluggable-transports/snowflake/-/merge_requests/62#note_2759900
This commit is contained in:
Shelikhoo 2021-11-09 19:34:16 +00:00
parent a6a53ff8ce
commit 2547883cf9
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GPG key ID: C4D5E79D22B25316
1 changed files with 9 additions and 9 deletions
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18
proxy/lib/snowflake.go
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@ -80,6 +80,12 @@ var currentNATTypeAccess = &sync.RWMutex{}
// Obtain currentNATTypeAccess before access. // Obtain currentNATTypeAccess before access.
var currentNATType = NATUnknown var currentNATType = NATUnknown
func getCurrentNATType() string {
currentNATTypeAccess.RLock()
defer currentNATTypeAccess.RUnlock()
return currentNATType
}
const ( const (
sessionIDLength = 16 sessionIDLength = 16
) )
@ -190,9 +196,7 @@ func (s *SignalingServer) pollOffer(sid string, shutdown chan struct{}) *webrtc.
return nil return nil
default: default:
numClients := int((tokens.count() / 8) * 8) // Round down to 8 numClients := int((tokens.count() / 8) * 8) // Round down to 8
currentNATTypeAccess.RLock() currentNATTypeLoaded := getCurrentNATType()
currentNATTypeLoaded := currentNATType
currentNATTypeAccess.RUnlock()
body, err := messages.EncodePollRequest(sid, "standalone", currentNATTypeLoaded, numClients) body, err := messages.EncodePollRequest(sid, "standalone", currentNATTypeLoaded, numClients)
if err != nil { if err != nil {
log.Printf("Error encoding poll message: %s", err.Error()) log.Printf("Error encoding poll message: %s", err.Error())
@ -541,9 +545,7 @@ func (sf *SnowflakeProxy) Start() error {
// use probetest to determine NAT compatability // use probetest to determine NAT compatability
sf.checkNATType(config, sf.NATProbeURL) sf.checkNATType(config, sf.NATProbeURL)
currentNATTypeAccess.RLock() currentNATTypeLoaded := getCurrentNATType()
currentNATTypeLoaded := currentNATType
currentNATTypeAccess.RUnlock()
log.Printf("NAT type: %s", currentNATTypeLoaded) log.Printf("NAT type: %s", currentNATTypeLoaded)
@ -632,9 +634,7 @@ func (sf *SnowflakeProxy) checkNATType(config webrtc.Configuration, probeURL str
return return
} }
currentNATTypeAccess.RLock() currentNATTypeLoaded := getCurrentNATType()
currentNATTypeLoaded := currentNATType
currentNATTypeAccess.RUnlock()
currentNATTypeTestResult := NATUnknown currentNATTypeTestResult := NATUnknown
select { select {