github.com/metacubex/quic-go@v0.44.1-0.20240520163451-20b689a59136/internal/wire/stream_data_blocked_frame.go (about)

     1  package wire
     2  
     3  import (
     4  	"github.com/metacubex/quic-go/internal/protocol"
     5  	"github.com/metacubex/quic-go/quicvarint"
     6  )
     7  
     8  // A StreamDataBlockedFrame is a STREAM_DATA_BLOCKED frame
     9  type StreamDataBlockedFrame struct {
    10  	StreamID          protocol.StreamID
    11  	MaximumStreamData protocol.ByteCount
    12  }
    13  
    14  func parseStreamDataBlockedFrame(b []byte, _ protocol.Version) (*StreamDataBlockedFrame, int, error) {
    15  	startLen := len(b)
    16  	sid, l, err := quicvarint.Parse(b)
    17  	if err != nil {
    18  		return nil, 0, replaceUnexpectedEOF(err)
    19  	}
    20  	b = b[l:]
    21  	offset, l, err := quicvarint.Parse(b)
    22  	if err != nil {
    23  		return nil, 0, replaceUnexpectedEOF(err)
    24  	}
    25  
    26  	return &StreamDataBlockedFrame{
    27  		StreamID:          protocol.StreamID(sid),
    28  		MaximumStreamData: protocol.ByteCount(offset),
    29  	}, startLen - len(b) + l, nil
    30  }
    31  
    32  func (f *StreamDataBlockedFrame) Append(b []byte, _ protocol.Version) ([]byte, error) {
    33  	b = append(b, 0x15)
    34  	b = quicvarint.Append(b, uint64(f.StreamID))
    35  	b = quicvarint.Append(b, uint64(f.MaximumStreamData))
    36  	return b, nil
    37  }
    38  
    39  // Length of a written frame
    40  func (f *StreamDataBlockedFrame) Length(protocol.Version) protocol.ByteCount {
    41  	return 1 + protocol.ByteCount(quicvarint.Len(uint64(f.StreamID))+quicvarint.Len(uint64(f.MaximumStreamData)))
    42  }