mirror of
https://github.com/SagerNet/sing-box.git
synced 2025-04-05 04:47:37 +03:00
30 lines
676 B
Go
30 lines
676 B
Go
package sniff
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import (
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"bufio"
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"context"
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"io"
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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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E "github.com/sagernet/sing/common/exceptions"
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)
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func SSH(_ context.Context, metadata *adapter.InboundContext, reader io.Reader) error {
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const sshPrefix = "SSH-2.0-"
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bReader := bufio.NewReader(reader)
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prefix, err := bReader.Peek(len(sshPrefix))
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if err != nil {
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return E.Cause1(ErrNeedMoreData, err)
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} else if string(prefix) != sshPrefix {
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return os.ErrInvalid
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}
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fistLine, _, err := bReader.ReadLine()
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if err != nil {
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return err
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}
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metadata.Protocol = C.ProtocolSSH
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metadata.Client = string(fistLine)[8:]
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return nil
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}
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