mirror of
https://github.com/shtorm-7/sing-box-extended.git
synced 2026-05-14 00:51:12 +03:00
98 lines
2.1 KiB
Go
98 lines
2.1 KiB
Go
package failover
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import (
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"encoding/binary"
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"io"
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"github.com/gofrs/uuid/v5"
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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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)
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const (
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Version = 0
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BufferSize = 10
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)
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const (
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CommandTCP = 1
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CommandReconnect = 2
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)
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const (
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StatusOK uint8 = iota + 1
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StatusSessionNotFound
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)
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var (
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SessionClosed = E.New("session closed")
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SessionNotFound = E.New("session not found")
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SessionExpired = E.New("session expired")
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SessionBroken = E.New("session broken")
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)
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var Destination = M.Socksaddr{
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Fqdn: "sp.failover.sing-box.arpa",
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Port: 444,
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}
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var AddressSerializer = M.NewSerializer(
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M.AddressFamilyByte(0x01, M.AddressFamilyIPv4),
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M.AddressFamilyByte(0x03, M.AddressFamilyIPv6),
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M.AddressFamilyByte(0x02, M.AddressFamilyFqdn),
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M.PortThenAddress(),
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)
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type Request struct {
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UUID uuid.UUID
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Command byte
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Destination M.Socksaddr
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}
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func ReadRequest(reader io.Reader) (*Request, error) {
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var request Request
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var version uint8
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err := binary.Read(reader, binary.BigEndian, &version)
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if err != nil {
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return nil, err
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}
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if version != Version {
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return nil, E.New("unknown version: ", version)
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}
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_, err = io.ReadFull(reader, request.UUID[:])
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if err != nil {
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return nil, err
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}
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err = binary.Read(reader, binary.BigEndian, &request.Command)
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if err != nil {
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return nil, err
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}
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request.Destination, err = AddressSerializer.ReadAddrPort(reader)
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if err != nil {
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return nil, err
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}
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return &request, nil
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}
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func WriteRequest(writer io.Writer, request *Request) error {
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var requestLen int
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requestLen += 1 // version
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requestLen += 1 // command
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requestLen += 16 // UUID
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requestLen += AddressSerializer.AddrPortLen(request.Destination)
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buffer := buf.NewSize(requestLen)
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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(request.Command),
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)
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err := AddressSerializer.WriteAddrPort(buffer, request.Destination)
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if err != nil {
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return err
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}
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return common.Error(writer.Write(buffer.Bytes()))
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}
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