mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-11-16 07:22:21 +08:00
26 lines
527 B
Go
26 lines
527 B
Go
package sniff
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import (
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"context"
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"encoding/binary"
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"os"
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"github.com/sagernet/sing-box/adapter"
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C "github.com/sagernet/sing-box/constant"
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)
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func STUNMessage(_ context.Context, metadata *adapter.InboundContext, packet []byte) error {
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pLen := len(packet)
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if pLen < 20 {
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return os.ErrInvalid
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}
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if binary.BigEndian.Uint32(packet[4:8]) != 0x2112A442 {
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return os.ErrInvalid
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}
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if len(packet) < 20+int(binary.BigEndian.Uint16(packet[2:4])) {
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return os.ErrInvalid
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}
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metadata.Protocol = C.ProtocolSTUN
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return nil
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}
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