github.com/apernet/quic-go@v0.43.1-0.20240515053213-5e9e635fd9f0/internal/wire/path_challenge_frame.go (about)

     1  package wire
     2  
     3  import (
     4  	"bytes"
     5  	"io"
     6  
     7  	"github.com/apernet/quic-go/internal/protocol"
     8  )
     9  
    10  // A PathChallengeFrame is a PATH_CHALLENGE frame
    11  type PathChallengeFrame struct {
    12  	Data [8]byte
    13  }
    14  
    15  func parsePathChallengeFrame(r *bytes.Reader, _ protocol.Version) (*PathChallengeFrame, error) {
    16  	frame := &PathChallengeFrame{}
    17  	if _, err := io.ReadFull(r, frame.Data[:]); err != nil {
    18  		if err == io.ErrUnexpectedEOF {
    19  			return nil, io.EOF
    20  		}
    21  		return nil, err
    22  	}
    23  	return frame, nil
    24  }
    25  
    26  func (f *PathChallengeFrame) Append(b []byte, _ protocol.Version) ([]byte, error) {
    27  	b = append(b, pathChallengeFrameType)
    28  	b = append(b, f.Data[:]...)
    29  	return b, nil
    30  }
    31  
    32  // Length of a written frame
    33  func (f *PathChallengeFrame) Length(_ protocol.Version) protocol.ByteCount {
    34  	return 1 + 8
    35  }