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use an unbuffered chan for the client transport parameters

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The client reads the transport parameters from the Encrypted Extensions
message. These transport parameters are passed to the session's run
loop's select statement via a channel.
We have to use an unbuffered channel here to make sure that the session
actually processes the transport parameters immediately.
This commit is contained in:
Marten Seemann
2018-02-08 11:04:27 +08:00
parent d71850eb2f
commit c9b95abe7e
3 changed files with 46 additions and 5 deletions
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5
internal/handshake/tls_extension_handler_client.go
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@@ -31,7 +31,10 @@ func NewExtensionHandlerClient(
supportedVersions []protocol.VersionNumber,
version protocol.VersionNumber,
) TLSExtensionHandler {
paramsChan := make(chan TransportParameters, 1)
// The client reads the transport parameters from the Encrypted Extensions message.
// The paramsChan is used in the session's run loop's select statement.
// We have to use an unbuffered channel here to make sure that the session actually processes the transport parameters immediately.
paramsChan := make(chan TransportParameters)
return &extensionHandlerClient{
ourParams: params,
paramsChan: paramsChan,