mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-09-20 02:27:50 +00:00
99 lines
2.5 KiB
Go
99 lines
2.5 KiB
Go
package vless
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import (
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"encoding/binary"
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"io"
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"github.com/sagernet/sing-vmess"
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"github.com/sagernet/sing/common"
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"github.com/sagernet/sing/common/buf"
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E "github.com/sagernet/sing/common/exceptions"
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M "github.com/sagernet/sing/common/metadata"
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"github.com/sagernet/sing/common/rw"
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)
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const Version = 0
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type Request struct {
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UUID []byte
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Command byte
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Destination M.Socksaddr
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}
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func WriteRequest(writer io.Writer, request Request, payload []byte) error {
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var requestLen int
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requestLen += 1 // version
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requestLen += 16 // uuid
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requestLen += 1 // protobuf length
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requestLen += 1 // command
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if request.Command != vmess.CommandMux {
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requestLen += vmess.AddressSerializer.AddrPortLen(request.Destination)
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}
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requestLen += len(payload)
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_buffer := buf.StackNewSize(requestLen)
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defer common.KeepAlive(_buffer)
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buffer := common.Dup(_buffer)
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defer buffer.Release()
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common.Must(
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buffer.WriteByte(Version),
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common.Error(buffer.Write(request.UUID)),
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buffer.WriteByte(0),
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buffer.WriteByte(request.Command),
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)
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if request.Command != vmess.CommandMux {
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common.Must(vmess.AddressSerializer.WriteAddrPort(buffer, request.Destination))
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}
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common.Must1(buffer.Write(payload))
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return common.Error(writer.Write(buffer.Bytes()))
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}
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func WritePacketRequest(writer io.Writer, request Request, payload []byte) error {
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var requestLen int
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requestLen += 1 // version
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requestLen += 16 // uuid
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requestLen += 1 // protobuf length
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requestLen += 1 // command
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requestLen += vmess.AddressSerializer.AddrPortLen(request.Destination)
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if len(payload) > 0 {
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requestLen += 2
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requestLen += len(payload)
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}
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_buffer := buf.StackNewSize(requestLen)
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defer common.KeepAlive(_buffer)
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buffer := common.Dup(_buffer)
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defer buffer.Release()
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common.Must(
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buffer.WriteByte(Version),
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common.Error(buffer.Write(request.UUID)),
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buffer.WriteByte(0),
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buffer.WriteByte(vmess.CommandUDP),
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vmess.AddressSerializer.WriteAddrPort(buffer, request.Destination),
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binary.Write(buffer, binary.BigEndian, uint16(len(payload))),
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common.Error(buffer.Write(payload)),
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)
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return common.Error(writer.Write(buffer.Bytes()))
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}
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func ReadResponse(reader io.Reader) error {
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version, err := rw.ReadByte(reader)
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if err != nil {
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return err
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}
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if version != Version {
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return E.New("unknown version: ", version)
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}
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protobufLength, err := rw.ReadByte(reader)
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if err != nil {
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return err
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}
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if protobufLength > 0 {
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err = rw.SkipN(reader, int(protobufLength))
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if err != nil {
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return err
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}
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}
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return nil
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}
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