TUN-4597: Add a QUIC server skeleton

- Added a QUIC server to accept streams
- Unit test for this server also tests ALPN
- Temporary echo capability for HTTP ConnectionType

vendor/github.com/lucas-clemente/quic-go/internal/qerr/error_codes.go

@@ -0,0 +1,88 @@
+package qerr
+
+import (
+	"fmt"
+
+	"github.com/lucas-clemente/quic-go/internal/qtls"
+)
+
+// TransportErrorCode is a QUIC transport error.
+type TransportErrorCode uint64
+
+// The error codes defined by QUIC
+const (
+	NoError                   TransportErrorCode = 0x0
+	InternalError             TransportErrorCode = 0x1
+	ConnectionRefused         TransportErrorCode = 0x2
+	FlowControlError          TransportErrorCode = 0x3
+	StreamLimitError          TransportErrorCode = 0x4
+	StreamStateError          TransportErrorCode = 0x5
+	FinalSizeError            TransportErrorCode = 0x6
+	FrameEncodingError        TransportErrorCode = 0x7
+	TransportParameterError   TransportErrorCode = 0x8
+	ConnectionIDLimitError    TransportErrorCode = 0x9
+	ProtocolViolation         TransportErrorCode = 0xa
+	InvalidToken              TransportErrorCode = 0xb
+	ApplicationErrorErrorCode TransportErrorCode = 0xc
+	CryptoBufferExceeded      TransportErrorCode = 0xd
+	KeyUpdateError            TransportErrorCode = 0xe
+	AEADLimitReached          TransportErrorCode = 0xf
+	NoViablePathError         TransportErrorCode = 0x10
+)
+
+func (e TransportErrorCode) IsCryptoError() bool {
+	return e >= 0x100 && e < 0x200
+}
+
+// Message is a description of the error.
+// It only returns a non-empty string for crypto errors.
+func (e TransportErrorCode) Message() string {
+	if !e.IsCryptoError() {
+		return ""
+	}
+	return qtls.Alert(e - 0x100).Error()
+}
+
+func (e TransportErrorCode) String() string {
+	switch e {
+	case NoError:
+		return "NO_ERROR"
+	case InternalError:
+		return "INTERNAL_ERROR"
+	case ConnectionRefused:
+		return "CONNECTION_REFUSED"
+	case FlowControlError:
+		return "FLOW_CONTROL_ERROR"
+	case StreamLimitError:
+		return "STREAM_LIMIT_ERROR"
+	case StreamStateError:
+		return "STREAM_STATE_ERROR"
+	case FinalSizeError:
+		return "FINAL_SIZE_ERROR"
+	case FrameEncodingError:
+		return "FRAME_ENCODING_ERROR"
+	case TransportParameterError:
+		return "TRANSPORT_PARAMETER_ERROR"
+	case ConnectionIDLimitError:
+		return "CONNECTION_ID_LIMIT_ERROR"
+	case ProtocolViolation:
+		return "PROTOCOL_VIOLATION"
+	case InvalidToken:
+		return "INVALID_TOKEN"
+	case ApplicationErrorErrorCode:
+		return "APPLICATION_ERROR"
+	case CryptoBufferExceeded:
+		return "CRYPTO_BUFFER_EXCEEDED"
+	case KeyUpdateError:
+		return "KEY_UPDATE_ERROR"
+	case AEADLimitReached:
+		return "AEAD_LIMIT_REACHED"
+	case NoViablePathError:
+		return "NO_VIABLE_PATH"
+	default:
+		if e.IsCryptoError() {
+			return fmt.Sprintf("CRYPTO_ERROR (%#x)", uint16(e))
+		}
+		return fmt.Sprintf("unknown error code: %#x", uint16(e))
+	}
+}

vendor/github.com/lucas-clemente/quic-go/internal/qerr/errors.go

@@ -0,0 +1,106 @@
+package qerr
+
+import (
+	"fmt"
+	"net"
+
+	"github.com/lucas-clemente/quic-go/internal/protocol"
+)
+
+var (
+	ErrHandshakeTimeout = &HandshakeTimeoutError{}
+	ErrIdleTimeout      = &IdleTimeoutError{}
+)
+
+type TransportError struct {
+	Remote       bool
+	FrameType    uint64
+	ErrorCode    TransportErrorCode
+	ErrorMessage string
+}
+
+var _ error = &TransportError{}
+
+// NewCryptoError create a new TransportError instance for a crypto error
+func NewCryptoError(tlsAlert uint8, errorMessage string) *TransportError {
+	return &TransportError{
+		ErrorCode:    0x100 + TransportErrorCode(tlsAlert),
+		ErrorMessage: errorMessage,
+	}
+}
+
+func (e *TransportError) Error() string {
+	str := e.ErrorCode.String()
+	if e.FrameType != 0 {
+		str += fmt.Sprintf(" (frame type: %#x)", e.FrameType)
+	}
+	msg := e.ErrorMessage
+	if len(msg) == 0 {
+		msg = e.ErrorCode.Message()
+	}
+	if len(msg) == 0 {
+		return str
+	}
+	return str + ": " + msg
+}
+
+// An ApplicationErrorCode is an application-defined error code.
+type ApplicationErrorCode uint64
+
+// A StreamErrorCode is an error code used to cancel streams.
+type StreamErrorCode uint64
+
+type ApplicationError struct {
+	Remote       bool
+	ErrorCode    ApplicationErrorCode
+	ErrorMessage string
+}
+
+var _ error = &ApplicationError{}
+
+func (e *ApplicationError) Error() string {
+	if len(e.ErrorMessage) == 0 {
+		return fmt.Sprintf("Application error %#x", e.ErrorCode)
+	}
+	return fmt.Sprintf("Application error %#x: %s", e.ErrorCode, e.ErrorMessage)
+}
+
+type IdleTimeoutError struct{}
+
+var _ error = &IdleTimeoutError{}
+
+func (e *IdleTimeoutError) Timeout() bool   { return true }
+func (e *IdleTimeoutError) Temporary() bool { return false }
+func (e *IdleTimeoutError) Error() string   { return "timeout: no recent network activity" }
+
+type HandshakeTimeoutError struct{}
+
+var _ error = &HandshakeTimeoutError{}
+
+func (e *HandshakeTimeoutError) Timeout() bool   { return true }
+func (e *HandshakeTimeoutError) Temporary() bool { return false }
+func (e *HandshakeTimeoutError) Error() string   { return "timeout: handshake did not complete in time" }
+
+// A VersionNegotiationError occurs when the client and the server can't agree on a QUIC version.
+type VersionNegotiationError struct {
+	Ours   []protocol.VersionNumber
+	Theirs []protocol.VersionNumber
+}
+
+func (e *VersionNegotiationError) Error() string {
+	return fmt.Sprintf("no compatible QUIC version found (we support %s, server offered %s)", e.Ours, e.Theirs)
+}
+
+// A StatelessResetError occurs when we receive a stateless reset.
+type StatelessResetError struct {
+	Token protocol.StatelessResetToken
+}
+
+var _ net.Error = &StatelessResetError{}
+
+func (e *StatelessResetError) Error() string {
+	return fmt.Sprintf("received a stateless reset with token %x", e.Token)
+}
+
+func (e *StatelessResetError) Timeout() bool   { return false }
+func (e *StatelessResetError) Temporary() bool { return true }

vendor/github.com/lucas-clemente/quic-go/internal/qerr/errors_go116.go

@@ -0,0 +1,55 @@
+// +build go1.16
+
+package qerr
+
+import (
+	"net"
+)
+
+func (e *TransportError) Is(target error) bool {
+	_, ok := target.(*TransportError)
+	if ok {
+		return true
+	}
+	return target == net.ErrClosed
+}
+
+func (e *ApplicationError) Is(target error) bool {
+	_, ok := target.(*ApplicationError)
+	if ok {
+		return true
+	}
+	return target == net.ErrClosed
+}
+
+func (e *IdleTimeoutError) Is(target error) bool {
+	_, ok := target.(*IdleTimeoutError)
+	if ok {
+		return true
+	}
+	return target == net.ErrClosed
+}
+
+func (e *HandshakeTimeoutError) Is(target error) bool {
+	_, ok := target.(*HandshakeTimeoutError)
+	if ok {
+		return true
+	}
+	return target == net.ErrClosed
+}
+
+func (e *VersionNegotiationError) Is(target error) bool {
+	_, ok := target.(*VersionNegotiationError)
+	if ok {
+		return true
+	}
+	return target == net.ErrClosed
+}
+
+func (e *StatelessResetError) Is(target error) bool {
+	_, ok := target.(*StatelessResetError)
+	if ok {
+		return true
+	}
+	return target == net.ErrClosed
+}

vendor/github.com/lucas-clemente/quic-go/internal/qerr/errors_not_go116.go

@@ -0,0 +1,33 @@
+// +build !go1.16
+
+package qerr
+
+func (e *TransportError) Is(target error) bool {
+	_, ok := target.(*TransportError)
+	return ok
+}
+
+func (e *ApplicationError) Is(target error) bool {
+	_, ok := target.(*ApplicationError)
+	return ok
+}
+
+func (e *IdleTimeoutError) Is(target error) bool {
+	_, ok := target.(*IdleTimeoutError)
+	return ok
+}
+
+func (e *HandshakeTimeoutError) Is(target error) bool {
+	_, ok := target.(*HandshakeTimeoutError)
+	return ok
+}
+
+func (e *VersionNegotiationError) Is(target error) bool {
+	_, ok := target.(*VersionNegotiationError)
+	return ok
+}
+
+func (e *StatelessResetError) Is(target error) bool {
+	_, ok := target.(*StatelessResetError)
+	return ok
+}