yggdrasil-go/misc/tests/tunbench-client.go

package main

import (
  "fmt"
	"log"
  "net"
  "os/exec"
  "time"

	"github.com/songgao/water"
)

const mtu = 65535

func setup_dev() *water.Interface {
	ifce, err := water.New(water.Config{
		DeviceType: water.TUN,
	})
	if err != nil {
    panic(err)
	}
  return ifce
}

func setup_dev1() *water.Interface {
  ifce := setup_dev()
  cmd := exec.Command("ip", "-f", "inet6",
                      "addr", "add", "fc00::2/8",
                      "dev", ifce.Name())
  out, err := cmd.CombinedOutput()
  if err != nil {
    fmt.Println(string(out))
    panic("Failed to assign address")
  }
  cmd = exec.Command("ip", "link", "set",
                     "dev", ifce.Name(),
                     "mtu", fmt.Sprintf("%d", mtu),
                     "up")
  out, err = cmd.CombinedOutput()
  if err != nil {
    fmt.Println(string(out))
    panic("Failed to bring up interface")
  }
  return ifce
}

func connect(ifce *water.Interface) {
  conn, err := net.DialTimeout("tcp", "192.168.2.2:9001", time.Second)
  if err != nil { panic(err) }
  sock := conn.(*net.TCPConn)
  // TODO go a worker to move packets to/from the tun
}

func bench() {
}

func main() {
  ifce := setup_dev1()
  connect(ifce)
  bench()
  fmt.Println("Done?")
  return
	ifce, err := water.New(water.Config{
		DeviceType: water.TUN,
	})
	if err != nil {
    panic(err)
	}

	log.Printf("Interface Name: %s\n", ifce.Name())

	packet := make([]byte, 2000)
	for {
		n, err := ifce.Read(packet)
		if err != nil {
      panic(err)
			log.Fatal(err)
		}
		log.Printf("Packet Received: % x\n", packet[:n])
	}
}