first code/readme/license commit

misc/tests/tunbench-server.go

@@ -0,0 +1,127 @@
+package main
+
+import (
+  "fmt"
+	"log"
+  "net"
+  "os/exec"
+
+	"github.com/songgao/water"
+)
+
+const mtu = 65535
+const netnsName = "tunbenchns"
+
+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::1/8",
+                      "dev", ifce.Name())
+  out, err := cmd.CombinedOutput()
+  if err != nil {
+    fmt.Println(string(out))
+    fmt.Println(string(err))
+    panic("Failed to assign address")
+  }
+  cmd = exec.Command("ip", "link", "set",
+                     "dev", tun.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 addNS(name string) {
+  cmd := exec.COmmand("ip", "netns", "add", name)
+  out, err := cmd.CombinedOutput()
+  if err != nil {
+    fmt.Println(string(out))
+    panic("Failed to setup netns")
+  }
+}
+
+func delNS(name string) {
+  cmd := exec.COmmand("ip", "netns", "delete", name)
+  out, err := cmd.CombinedOutput()
+  if err != nil {
+    fmt.Println(string(out))
+    panic("Failed to setup netns")
+  }
+}
+
+func doInNetNS(comm ...string) *exec.Cmd {
+  return exec.Command("ip", "netns", "exec", netnsName, comm...)
+}
+
+func setup_dev2() *water.Interface {
+  ifce := setup_dev()
+  addNS(netnsName)
+  cmd := exec.Command("ip", "link", "set", ifce.Name(), "netns", netnsName)
+  out, err := cmd.CombinedOutput()
+  if err != nil {
+    fmt.Println(string(out))
+    panic("Failed to move tun to netns")
+  }
+  cmd = doInNetNS("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 = doInNetNS("ip", "link", "set",
+                  "dev", tun.name,
+                  "mtu", fmt.Sprintf("%d", mtu),
+                  "up")
+  out, err := cmd.CombinedOutput()
+  if err != nil {
+    fmt.Println(string(out))
+    fmt.Println(string(err))
+    panic("Failed to bring up interface")
+  }
+  return ifce
+}
+
+func connect() {
+
+}
+
+func bench() {
+}
+
+func main() {
+	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])
+	}
+}
+