wiregaurd_http_server.go

// Fork of https://github.com/WireGuard/wireguard-go/blob/master/tun/netstack/examples/http_server.go
// Usage:
// go run main.go privateKey peerPublicKey
// go run main.go YL7A9IqywiX7P4yMnsm1ocbOdgzIpaiyXa7JBPhcAFo= FiHXTbyGNzbXJDGhw15Laa3t+FHgUQMqcePTnA7wJzM=
package main

import (
	"fmt"
	"io"
	"log"
	"net"
	"net/http"
	"os"

	"golang.zx2c4.com/wireguard/conn"
	"golang.zx2c4.com/wireguard/device"
	"golang.zx2c4.com/wireguard/tun/netstack"
	"tailscale.com/types/wgkey"
)

func main() {
	// Wireguard
	tun, tnet, err := netstack.CreateNetTUN(
		[]net.IP{net.ParseIP("192.168.4.29")},
		[]net.IP{net.ParseIP("8.8.8.8")},
		1420)
	if err != nil {
		log.Panic(err)
	}
	logger := device.NewLogger(1, "")
	dev := device.NewDevice(tun, conn.NewDefaultBind(), logger)
  // Grab base64 Key
	privateKey, err := wgkey.Parse(os.Args[1])
	if err != nil {
		log.Fatalln("Could not decode private key: ", err)
	}
  // Grab base64 Key
	publicKey, err := wgkey.Parse(os.Args[2])
	if err != nil {
		log.Fatalln("Could not decode public key: ", err)
	}

	cfg := fmt.Sprintf(`private_key=%s
public_key=%s
endpoint=147.75.199.245:51820
allowed_ip=0.0.0.0/0
persistent_keepalive_interval=25
`, privateKey.HexString(), publicKey.HexString())
	dev.IpcSet(cfg)
	dev.Up()

	listener, err := tnet.ListenTCP(&net.TCPAddr{Port: 80})
	if err != nil {
		log.Panicln(err)
	}
	http.HandleFunc("/", func(writer http.ResponseWriter, request *http.Request) {
		log.Printf("> %s - %s - %s", request.RemoteAddr, request.URL.String(), request.UserAgent())
		io.WriteString(writer, "Hello from userspace TCP!")
	})
	err = http.Serve(listener, nil)
	if err != nil {
		log.Panicln(err)
	}

}