TUN-528: Move cloudflared into a separate repo

h2mux/error.go

@@ -0,0 +1,61 @@
+package h2mux
+
+import (
+	"fmt"
+
+	"golang.org/x/net/http2"
+)
+
+var (
+	ErrHandshakeTimeout               = MuxerHandshakeError{"1000 handshake timeout"}
+	ErrBadHandshakeNotSettings        = MuxerHandshakeError{"1001 unexpected response"}
+	ErrBadHandshakeUnexpectedAck      = MuxerHandshakeError{"1002 unexpected response"}
+	ErrBadHandshakeNoMagic            = MuxerHandshakeError{"1003 unexpected response"}
+	ErrBadHandshakeWrongMagic         = MuxerHandshakeError{"1004 connected to endpoint of wrong type"}
+	ErrBadHandshakeNotSettingsAck     = MuxerHandshakeError{"1005 unexpected response"}
+	ErrBadHandshakeUnexpectedSettings = MuxerHandshakeError{"1006 unexpected response"}
+
+	ErrUnexpectedFrameType = MuxerProtocolError{"2001 unexpected frame type", http2.ErrCodeProtocol}
+	ErrUnknownStream       = MuxerProtocolError{"2002 unknown stream", http2.ErrCodeProtocol}
+	ErrInvalidStream       = MuxerProtocolError{"2003 invalid stream", http2.ErrCodeProtocol}
+
+	ErrStreamHeadersSent = MuxerApplicationError{"3000 headers already sent"}
+	ErrConnectionClosed  = MuxerApplicationError{"3001 connection closed"}
+	ErrConnectionDropped = MuxerApplicationError{"3002 connection dropped"}
+
+	ErrClosedStream = MuxerStreamError{"4000 stream closed", http2.ErrCodeStreamClosed}
+)
+
+type MuxerHandshakeError struct {
+	cause string
+}
+
+func (e MuxerHandshakeError) Error() string {
+	return fmt.Sprintf("Handshake error: %s", e.cause)
+}
+
+type MuxerProtocolError struct {
+	cause  string
+	h2code http2.ErrCode
+}
+
+func (e MuxerProtocolError) Error() string {
+	return fmt.Sprintf("Protocol error: %s", e.cause)
+}
+
+type MuxerApplicationError struct {
+	cause string
+}
+
+func (e MuxerApplicationError) Error() string {
+	return fmt.Sprintf("Application error: %s", e.cause)
+}
+
+type MuxerStreamError struct {
+	cause  string
+	h2code http2.ErrCode
+}
+
+func (e MuxerStreamError) Error() string {
+	return fmt.Sprintf("Stream error: %s", e.cause)
+}