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77 lines
2.0 KiB
Go
77 lines
2.0 KiB
Go
package webtransport
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import (
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"errors"
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"fmt"
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"github.com/quic-go/quic-go"
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)
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// StreamErrorCode is an error code used for stream termination.
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type StreamErrorCode uint32
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// SessionErrorCode is an error code for session termination.
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type SessionErrorCode uint32
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const (
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firstErrorCode = 0x52e4a40fa8db
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lastErrorCode = 0x52e5ac983162
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)
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func webtransportCodeToHTTPCode(n StreamErrorCode) quic.StreamErrorCode {
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return quic.StreamErrorCode(firstErrorCode) + quic.StreamErrorCode(n) + quic.StreamErrorCode(n/0x1e)
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}
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func httpCodeToWebtransportCode(h quic.StreamErrorCode) (StreamErrorCode, error) {
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if h < firstErrorCode || h > lastErrorCode {
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return 0, errors.New("error code outside of expected range")
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}
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if (h-0x21)%0x1f == 0 {
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return 0, errors.New("invalid error code")
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}
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shifted := h - firstErrorCode
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return StreamErrorCode(shifted - shifted/0x1f), nil
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}
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const (
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// WTBufferedStreamRejectedErrorCode is the error code of the
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// WT_BUFFERED_STREAM_REJECTED error.
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WTBufferedStreamRejectedErrorCode quic.StreamErrorCode = 0x3994bd84
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// WTSessionGoneErrorCode is the error code of the WT_SESSION_GONE error.
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WTSessionGoneErrorCode quic.StreamErrorCode = 0x170d7b68
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)
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// StreamError is the error that is returned from stream operations (Read, Write) when the stream is canceled.
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type StreamError struct {
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ErrorCode StreamErrorCode
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Remote bool
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}
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var _ error = &StreamError{}
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func (e *StreamError) Error() string {
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return fmt.Sprintf("stream canceled with error code %d", e.ErrorCode)
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}
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func (e *StreamError) Is(target error) bool {
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t, ok := target.(*StreamError)
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return ok && t.Remote == e.Remote && t.ErrorCode == e.ErrorCode
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}
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// SessionError is a WebTransport connection error.
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type SessionError struct {
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Remote bool
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ErrorCode SessionErrorCode
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Message string
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}
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var _ error = &SessionError{}
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func (e *SessionError) Error() string { return e.Message }
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func (e *SessionError) Is(target error) bool {
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t, ok := target.(*SessionError)
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return ok && e.ErrorCode == t.ErrorCode && e.Remote == t.Remote
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}
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