57 lines
766 B
Go
57 lines
766 B
Go
package main
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import (
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"io"
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"log"
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"net"
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)
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type TCP struct {
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config *Config
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}
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func NewTCPServer(c *Config) TCP {
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return TCP{config: c}
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}
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func (tcp TCP) Listen() error {
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ln, err := net.Listen("tcp", tcp.config.Listen)
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if err != nil {
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return err
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}
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defer ln.Close()
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for {
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conn, err := ln.Accept()
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if err != nil {
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return err
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}
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go func() {
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defer conn.Close()
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conn2, err := net.Dial("tcp", tcp.config.TCPProxy)
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if err != nil {
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log.Println(err)
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return
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}
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errc := make(chan error)
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go func() {
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_, err := io.Copy(conn, conn2)
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select {
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case errc <- err:
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default:
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}
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}()
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go func() {
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_, err := io.Copy(conn2, conn)
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select {
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case errc <- err:
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default:
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}
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}()
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<-errc
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}()
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}
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}
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