github.com/daeuniverse/quic-go@v0.0.0-20240413031024-943f218e0810/internal/wire/streams_blocked_frame.go (about)

     1  package wire
     2  
     3  import (
     4  	"bytes"
     5  	"fmt"
     6  
     7  	"github.com/daeuniverse/quic-go/internal/protocol"
     8  	"github.com/daeuniverse/quic-go/quicvarint"
     9  )
    10  
    11  // A StreamsBlockedFrame is a STREAMS_BLOCKED frame
    12  type StreamsBlockedFrame struct {
    13  	Type        protocol.StreamType
    14  	StreamLimit protocol.StreamNum
    15  }
    16  
    17  func parseStreamsBlockedFrame(r *bytes.Reader, typ uint64, _ protocol.Version) (*StreamsBlockedFrame, error) {
    18  	f := &StreamsBlockedFrame{}
    19  	switch typ {
    20  	case bidiStreamBlockedFrameType:
    21  		f.Type = protocol.StreamTypeBidi
    22  	case uniStreamBlockedFrameType:
    23  		f.Type = protocol.StreamTypeUni
    24  	}
    25  	streamLimit, err := quicvarint.Read(r)
    26  	if err != nil {
    27  		return nil, err
    28  	}
    29  	f.StreamLimit = protocol.StreamNum(streamLimit)
    30  	if f.StreamLimit > protocol.MaxStreamCount {
    31  		return nil, fmt.Errorf("%d exceeds the maximum stream count", f.StreamLimit)
    32  	}
    33  	return f, nil
    34  }
    35  
    36  func (f *StreamsBlockedFrame) Append(b []byte, _ protocol.Version) ([]byte, error) {
    37  	switch f.Type {
    38  	case protocol.StreamTypeBidi:
    39  		b = append(b, bidiStreamBlockedFrameType)
    40  	case protocol.StreamTypeUni:
    41  		b = append(b, uniStreamBlockedFrameType)
    42  	}
    43  	b = quicvarint.Append(b, uint64(f.StreamLimit))
    44  	return b, nil
    45  }
    46  
    47  // Length of a written frame
    48  func (f *StreamsBlockedFrame) Length(_ protocol.Version) protocol.ByteCount {
    49  	return 1 + quicvarint.Len(uint64(f.StreamLimit))
    50  }