89 lines
2.2 KiB
Go
89 lines
2.2 KiB
Go
package wire
|
|
|
|
import (
|
|
"bytes"
|
|
|
|
"github.com/lucas-clemente/quic-go/internal/protocol"
|
|
"github.com/lucas-clemente/quic-go/internal/utils"
|
|
)
|
|
|
|
// A RstStreamFrame in QUIC
|
|
type RstStreamFrame struct {
|
|
StreamID protocol.StreamID
|
|
ErrorCode uint32
|
|
ByteOffset protocol.ByteCount
|
|
}
|
|
|
|
// ParseRstStreamFrame parses a RST_STREAM frame
|
|
func ParseRstStreamFrame(r *bytes.Reader, version protocol.VersionNumber) (*RstStreamFrame, error) {
|
|
if _, err := r.ReadByte(); err != nil { // read the TypeByte
|
|
return nil, err
|
|
}
|
|
|
|
var streamID protocol.StreamID
|
|
var errorCode uint32
|
|
var byteOffset protocol.ByteCount
|
|
if version.UsesIETFFrameFormat() {
|
|
sid, err := utils.ReadVarInt(r)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
streamID = protocol.StreamID(sid)
|
|
ec, err := utils.BigEndian.ReadUint16(r)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
errorCode = uint32(ec)
|
|
bo, err := utils.ReadVarInt(r)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
byteOffset = protocol.ByteCount(bo)
|
|
} else {
|
|
sid, err := utils.BigEndian.ReadUint32(r)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
streamID = protocol.StreamID(sid)
|
|
bo, err := utils.BigEndian.ReadUint64(r)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
byteOffset = protocol.ByteCount(bo)
|
|
ec, err := utils.BigEndian.ReadUint32(r)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
errorCode = uint32(ec)
|
|
}
|
|
|
|
return &RstStreamFrame{
|
|
StreamID: streamID,
|
|
ErrorCode: errorCode,
|
|
ByteOffset: byteOffset,
|
|
}, nil
|
|
}
|
|
|
|
//Write writes a RST_STREAM frame
|
|
func (f *RstStreamFrame) Write(b *bytes.Buffer, version protocol.VersionNumber) error {
|
|
b.WriteByte(0x01)
|
|
if version.UsesIETFFrameFormat() {
|
|
utils.WriteVarInt(b, uint64(f.StreamID))
|
|
utils.BigEndian.WriteUint16(b, uint16(f.ErrorCode))
|
|
utils.WriteVarInt(b, uint64(f.ByteOffset))
|
|
} else {
|
|
utils.BigEndian.WriteUint32(b, uint32(f.StreamID))
|
|
utils.BigEndian.WriteUint64(b, uint64(f.ByteOffset))
|
|
utils.BigEndian.WriteUint32(b, f.ErrorCode)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// MinLength of a written frame
|
|
func (f *RstStreamFrame) MinLength(version protocol.VersionNumber) (protocol.ByteCount, error) {
|
|
if version.UsesIETFFrameFormat() {
|
|
return 1 + utils.VarIntLen(uint64(f.StreamID)) + 2 + utils.VarIntLen(uint64(f.ByteOffset)), nil
|
|
}
|
|
return 1 + 4 + 8 + 4, nil
|
|
}
|