mirror of
https://github.com/v2fly/v2ray-core.git
synced 2024-09-19 18:36:10 -04:00
26 lines
507 B
Go
26 lines
507 B
Go
package internal
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import (
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"net"
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"reflect"
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)
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var (
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errInvalidConn = newError("Invalid Connection.")
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)
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// GetSysFd returns the underlying fd of a connection.
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func GetSysFd(conn net.Conn) (int, error) {
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cv := reflect.ValueOf(conn)
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switch ce := cv.Elem(); ce.Kind() {
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case reflect.Struct:
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netfd := ce.FieldByName("conn").FieldByName("fd")
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switch fe := netfd.Elem(); fe.Kind() {
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case reflect.Struct:
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fd := fe.FieldByName("sysfd")
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return int(fd.Int()), nil
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}
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}
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return 0, errInvalidConn
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}
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