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33 lines
778 B
Go
33 lines
778 B
Go
//go:build linux
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// +build linux
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package utils
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import (
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"fmt"
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"net"
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"syscall"
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)
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// Output a description of a connection that can identify it to other systems
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// administration tools.
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func DescribeConn(c net.Conn) (description string) {
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description = "<error>"
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switch conn := c.(type) {
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case *net.UnixConn:
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f, err := conn.File()
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if err != nil {
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return
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}
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defer f.Close()
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ucred, err := syscall.GetsockoptUcred(int(f.Fd()), syscall.SOL_SOCKET, syscall.SO_PEERCRED)
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if err != nil {
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return
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}
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return fmt.Sprintf("%s <-> %s [pid=%d, uid=%d]", conn.LocalAddr().String(), conn.RemoteAddr().String(), ucred.Pid, ucred.Uid)
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default:
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// *net.TCPConn or *tls.Conn
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return fmt.Sprintf("%s <-> %s", conn.LocalAddr().String(), conn.RemoteAddr().String())
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}
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}
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