47 lines
713 B
Go
47 lines
713 B
Go
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package main
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import (
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"flag"
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"io"
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"log"
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"net"
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"github.com/kisom/goutils/die"
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)
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func proxy(conn net.Conn, inside string) error {
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proxyConn, err := net.Dial("tcp", inside)
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if err != nil {
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return err
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}
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defer proxyConn.Close()
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defer conn.Close()
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go func() {
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io.Copy(conn, proxyConn)
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}()
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_, err = io.Copy(proxyConn, conn)
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return err
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}
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func main() {
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var outside, inside string
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flag.StringVar(&outside, "f", "8080", "outside port")
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flag.StringVar(&inside, "p", "4000", "inside port")
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flag.Parse()
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l, err := net.Listen("tcp", "0.0.0.0:"+outside)
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die.If(err)
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for {
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conn, err := l.Accept()
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if err != nil {
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log.Println(err)
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continue
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}
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go proxy(conn, "127.0.0.1:"+inside)
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}
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}
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