mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-12-27 03:25:38 +08:00
26 lines
527 B
Go
26 lines
527 B
Go
package sniff
|
|
|
|
import (
|
|
"context"
|
|
"encoding/binary"
|
|
"os"
|
|
|
|
"github.com/sagernet/sing-box/adapter"
|
|
C "github.com/sagernet/sing-box/constant"
|
|
)
|
|
|
|
func STUNMessage(_ context.Context, metadata *adapter.InboundContext, packet []byte) error {
|
|
pLen := len(packet)
|
|
if pLen < 20 {
|
|
return os.ErrInvalid
|
|
}
|
|
if binary.BigEndian.Uint32(packet[4:8]) != 0x2112A442 {
|
|
return os.ErrInvalid
|
|
}
|
|
if len(packet) < 20+int(binary.BigEndian.Uint16(packet[2:4])) {
|
|
return os.ErrInvalid
|
|
}
|
|
metadata.Protocol = C.ProtocolSTUN
|
|
return nil
|
|
}
|