working release

.gitignore

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+up-six.sh

down-six.sh

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+ip link del he-ipv6

main.go

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+package main
+
+import (
+    "fmt"
+    "log"
+    "os/exec"
+    "io/ioutil"
+    "strings"
+    "math/rand"
+    "time"
+)
+
+const (
+    upFile = "up-six.sh"
+    downFile = "down-six.sh"
+    repeatTimer = 120
+)
+
+func main() {
+    for true {
+        fileToExec(downFile)
+        fileToExec(upFile)
+        time.Sleep(repeatTimer * time.Second)
+    }
+}
+
+func fileToExec(filename string) {
+    doCmds := fileToCmd(filename)
+    for _, currCmd := range doCmds {
+        actualCmd := ""
+        if strings.Count(currCmd, "%x") == 1 {
+            actualCmd = fmt.Sprintf(currCmd, rand.Int() % 65536)
+        } else if strings.Count(currCmd, "%x") == 2 {
+            actualCmd = fmt.Sprintf(currCmd, rand.Int() % 65536, rand.Int() % 65536)
+        } else if strings.Count(currCmd, "%x") == 3 {
+            actualCmd = fmt.Sprintf(currCmd, rand.Int() % 65536, rand.Int() % 65536, rand.Int() % 65536)
+        } else if strings.Count(currCmd, "%x") == 4 {
+            actualCmd = fmt.Sprintf(currCmd, rand.Int() % 65536, rand.Int() % 65536, rand.Int() % 65536, rand.Int() % 65536)
+        } else if strings.Count(currCmd, "%x") == 5 {
+            actualCmd = fmt.Sprintf(currCmd, rand.Int() % 65536, rand.Int() % 65536, rand.Int() % 65536, rand.Int() % 65536, rand.Int() % 65536)
+        } else {
+            actualCmd = currCmd
+        }
+        executeCmd(actualCmd)
+    }
+}
+
+func fileToCmd(filename string) []string {
+    fileBody, err := ioutil.ReadFile(filename)
+    if err != nil {
+        log.Printf("Error while reading file %s\n", filename)
+        return []string{}
+    }
+    cmdArr := strings.Split(string(fileBody), "\n")
+    return cmdArr
+}
+
+func executeCmd(cmdStr string) {
+    cmd := exec.Command("bash", "-c", cmdStr)
+    log.Println(cmdStr)
+    err := cmd.Run()
+    if err != nil {
+        log.Println(err)
+    }
+}

up-six.sh.example

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+# use configuration from hurricane electric to modify
+# up to 5 hex placeholder in ipv6 allowed
+
+ip tunnel add he-ipv6 mode sit remote 1.2.3.4 local 1.2.3.5 ttl 255
+ip link set he-ipv6 up
+ip addr add aaaa:aaa:aa:aaa::%x:%x/64 dev he-ipv6
+ip route add ::/0 dev he-ipv6
+ip -f inet6 addr