TUN-6637: Upgrade quic-go

vendor/github.com/lucas-clemente/quic-go/interface.go

@@ -211,6 +211,18 @@ type EarlyConnection interface {
 	NextConnection() Connection
 }
 
+// A ConnectionIDGenerator is a interface that allows clients to implement their own format
+// for the Connection IDs that servers/clients use as SrcConnectionID in QUIC packets.
+type ConnectionIDGenerator interface {
+
+	// GenerateConnectionID generates a new ConnectionID.
+	GenerateConnectionID() ([]byte, error)
+
+	// ConnectionIDLen tells what is the length of the ConnectionIDs generated by the implementation of
+	// this interface.
+	ConnectionIDLen() int
+}
+
 // Config contains all configuration data needed for a QUIC server or client.
 type Config struct {
 	// The QUIC versions that can be negotiated.
@@ -223,6 +235,11 @@ type Config struct {
 	// If used for a server, or dialing on a packet conn, a 4 byte connection ID will be used.
 	// When dialing on a packet conn, the ConnectionIDLength value must be the same for every Dial call.
 	ConnectionIDLength int
+	// An optional ConnectionIDGenerator to be used for ConnectionIDs generated during the lifecycle of a QUIC connection.
+	// The goal is to give some control on how connection IDs, which can be useful in some scenarios, in particular for servers.
+	// By default, if not provided, random connection IDs with the length given by ConnectionIDLength is used.
+	// Otherwise, if one is provided, then ConnectionIDLength is ignored.
+	ConnectionIDGenerator ConnectionIDGenerator
 	// HandshakeIdleTimeout is the idle timeout before completion of the handshake.
 	// Specifically, if we don't receive any packet from the peer within this time, the connection attempt is aborted.
 	// If this value is zero, the timeout is set to 5 seconds.