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fix: generate ClientHelloSpec only once #306

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merged 2 commits into from
Jul 19, 2024
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1 change: 1 addition & 0 deletions u_conn.go
Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,7 @@ type UConn struct {
sessionController *sessionController

clientHelloBuildStatus ClientHelloBuildStatus
clientHelloSpec *ClientHelloSpec

HandshakeState PubClientHandshakeState

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38 changes: 22 additions & 16 deletions u_parrots.go
Original file line number Diff line number Diff line change
Expand Up @@ -2588,25 +2588,31 @@ func ShuffleChromeTLSExtensions(exts []TLSExtension) []TLSExtension {
}

func (uconn *UConn) applyPresetByID(id ClientHelloID) (err error) {
var spec ClientHelloSpec
uconn.ClientHelloID = id
// choose/generate the spec
switch id.Client {
case helloRandomized, helloRandomizedNoALPN, helloRandomizedALPN:
spec, err = uconn.generateRandomizedSpec()
if err != nil {
return err
}
case helloCustom:
return nil
default:
spec, err = UTLSIdToSpec(id)
if err != nil {
return err

if uconn.clientHelloSpec == nil {
var spec ClientHelloSpec
uconn.ClientHelloID = id

// choose/generate the spec
switch id.Client {
case helloRandomized, helloRandomizedNoALPN, helloRandomizedALPN:
spec, err = uconn.generateRandomizedSpec()
if err != nil {
return err
}
case helloCustom:
return nil
default:
spec, err = UTLSIdToSpec(id)
if err != nil {
return err
}
}

uconn.clientHelloSpec = &spec
}

return uconn.ApplyPreset(&spec)
return uconn.ApplyPreset(uconn.clientHelloSpec)
}

// ApplyPreset should only be used in conjunction with HelloCustom to apply custom specs.
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