tarpit.go

package main

import (
    "log"
    "net"
)

// "Handle" the connection. Note: The connection is never actually closed; it just remains open forever.
func handle(c net.Conn) {
    b := make([]byte, 1024)
    log.Printf("connection accepted from %s ", c.RemoteAddr())

    for {
        // Consume all the content from the connection
        _, err := c.Read(b)

        if err != nil {
            log.Printf("error: %s", err.Error())

            return
        }

        // Print the contnet
        log.Printf("%s", b)
    }
}

// A dumb sinkhole.
//
// Works by just accepting the TCP connection but neither closing nor responding to it.
//
// Implemented by stubbing out the DNS server, responding with the machine running this
// service .
func main() {
    ln, err := net.Listen("tcp", ":443")
    if err != nil {
        panic(err)
    }

    for {
        c, err := ln.Accept()

        if err != nil {
            panic(err)
        }

        go handle(c)
    }
}