mirror of https://github.com/v2ray/v2ray-core
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
101 lines
2.0 KiB
101 lines
2.0 KiB
package mux
|
|
|
|
import (
|
|
"io"
|
|
|
|
"v2ray.com/core/common/buf"
|
|
"v2ray.com/core/common/serial"
|
|
)
|
|
|
|
// ReadMetadata reads FrameMetadata from the given reader.
|
|
func ReadMetadata(reader io.Reader) (*FrameMetadata, error) {
|
|
metaLen, err := serial.ReadUint16(reader)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if metaLen > 512 {
|
|
return nil, newError("invalid metalen ", metaLen).AtWarning()
|
|
}
|
|
|
|
b := buf.New()
|
|
defer b.Release()
|
|
|
|
if err := b.Reset(buf.ReadFullFrom(reader, int(metaLen))); err != nil {
|
|
return nil, err
|
|
}
|
|
return ReadFrameFrom(b.Bytes())
|
|
}
|
|
|
|
// PacketReader is an io.Reader that reads whole chunk of Mux frames every time.
|
|
type PacketReader struct {
|
|
reader io.Reader
|
|
eof bool
|
|
}
|
|
|
|
// NewPacketReader creates a new PacketReader.
|
|
func NewPacketReader(reader io.Reader) *PacketReader {
|
|
return &PacketReader{
|
|
reader: reader,
|
|
eof: false,
|
|
}
|
|
}
|
|
|
|
// ReadMultiBuffer implements buf.Reader.
|
|
func (r *PacketReader) ReadMultiBuffer() (buf.MultiBuffer, error) {
|
|
if r.eof {
|
|
return nil, io.EOF
|
|
}
|
|
|
|
size, err := serial.ReadUint16(r.reader)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
var b *buf.Buffer
|
|
if size <= buf.Size {
|
|
b = buf.New()
|
|
} else {
|
|
b = buf.NewLocal(int(size))
|
|
}
|
|
if err := b.AppendSupplier(buf.ReadFullFrom(r.reader, int(size))); err != nil {
|
|
b.Release()
|
|
return nil, err
|
|
}
|
|
r.eof = true
|
|
return buf.NewMultiBufferValue(b), nil
|
|
}
|
|
|
|
// StreamReader reads Mux frame as a stream.
|
|
type StreamReader struct {
|
|
reader *buf.BufferedReader
|
|
leftOver int
|
|
}
|
|
|
|
// NewStreamReader creates a new StreamReader.
|
|
func NewStreamReader(reader *buf.BufferedReader) *StreamReader {
|
|
return &StreamReader{
|
|
reader: reader,
|
|
leftOver: -1,
|
|
}
|
|
}
|
|
|
|
// ReadMultiBuffer implmenets buf.Reader.
|
|
func (r *StreamReader) ReadMultiBuffer() (buf.MultiBuffer, error) {
|
|
if r.leftOver == 0 {
|
|
r.leftOver = -1
|
|
return nil, io.EOF
|
|
}
|
|
|
|
if r.leftOver == -1 {
|
|
size, err := serial.ReadUint16(r.reader)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
r.leftOver = int(size)
|
|
}
|
|
|
|
mb, err := r.reader.ReadAtMost(r.leftOver)
|
|
r.leftOver -= mb.Len()
|
|
return mb, err
|
|
}
|