25 lines
552 B
Go
25 lines
552 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(ctx context.Context, packet []byte) (*adapter.InboundContext, error) {
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pLen := len(packet)
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if pLen < 20 {
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return nil, os.ErrInvalid
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}
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if binary.BigEndian.Uint32(packet[4:8]) != 0x2112A442 {
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return nil, 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 nil, os.ErrInvalid
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}
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return &adapter.InboundContext{Protocol: C.ProtocolSTUN}, nil
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}
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