send the transport parameters in the TLS handshake

internal/handshake/tls_extension.go

@@ -0,0 +1,54 @@
+package handshake
+
+import (
+	"github.com/bifurcation/mint"
+)
+
+type transportParameterID uint16
+
+const quicTLSExtensionType = 26
+
+const (
+	initialMaxStreamDataParameterID transportParameterID = iota
+	initialMaxDataParameterID
+	initialMaxStreamIDParameterID
+	idleTimeoutParameterID
+	omitConnectionIDParameterID
+	maxPacketSizeParameterID
+	statelessResetTokenParameterID
+)
+
+type transportParameter struct {
+	Parameter transportParameterID
+	Value     []byte `tls:"head=2"`
+}
+
+type clientHelloTransportParameters struct {
+	NegotiatedVersion uint32               // actually a protocol.VersionNumber
+	InitialVersion    uint32               // actually a protocol.VersionNumber
+	Parameters        []transportParameter `tls:"head=2"`
+}
+
+type encryptedExtensionsTransportParameters struct {
+	SupportedVersions []uint32             `tls:"head=1"` // actually a protocol.VersionNumber
+	Parameters        []transportParameter `tls:"head=2"`
+}
+
+type tlsExtensionBody struct {
+	data []byte
+}
+
+var _ mint.ExtensionBody = &tlsExtensionBody{}
+
+func (e *tlsExtensionBody) Type() mint.ExtensionType {
+	return quicTLSExtensionType
+}
+
+func (e *tlsExtensionBody) Marshal() ([]byte, error) {
+	return e.data, nil
+}
+
+func (e *tlsExtensionBody) Unmarshal(data []byte) (int, error) {
+	e.data = data
+	return len(data), nil
+}