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60 lines
1.3 KiB
60 lines
1.3 KiB
package mux
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import (
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"io"
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"github.com/xtls/xray-core/common/buf"
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"github.com/xtls/xray-core/common/crypto"
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"github.com/xtls/xray-core/common/errors"
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"github.com/xtls/xray-core/common/net"
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"github.com/xtls/xray-core/common/serial"
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)
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// PacketReader is an io.Reader that reads whole chunk of Mux frames every time.
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type PacketReader struct {
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reader io.Reader
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eof bool
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dest *net.Destination
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}
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// NewPacketReader creates a new PacketReader.
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func NewPacketReader(reader io.Reader, dest *net.Destination) *PacketReader {
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return &PacketReader{
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reader: reader,
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eof: false,
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dest: dest,
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}
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}
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// ReadMultiBuffer implements buf.Reader.
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func (r *PacketReader) ReadMultiBuffer() (buf.MultiBuffer, error) {
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if r.eof {
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return nil, io.EOF
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}
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size, err := serial.ReadUint16(r.reader)
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if err != nil {
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return nil, err
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}
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if size > buf.Size {
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return nil, errors.New("packet size too large: ", size)
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}
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b := buf.New()
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if _, err := b.ReadFullFrom(r.reader, int32(size)); err != nil {
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b.Release()
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return nil, err
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}
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r.eof = true
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if r.dest != nil && r.dest.Network == net.Network_UDP {
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b.UDP = r.dest
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}
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return buf.MultiBuffer{b}, nil
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}
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// NewStreamReader creates a new StreamReader.
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func NewStreamReader(reader *buf.BufferedReader) buf.Reader {
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return crypto.NewChunkStreamReaderWithChunkCount(crypto.PlainChunkSizeParser{}, reader, 1)
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}
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