From 1a60e89ada6545d60e6c9d78c2d28f2b1b3f510c Mon Sep 17 00:00:00 2001
From: Neil Alexander <neilalexander@users.noreply.github.com>
Date: Thu, 21 Jun 2018 16:03:46 +0100
Subject: [PATCH] Add yggdrasilconf for testing with vyatta-yggdrasil

---
 contrib/config/yggdrasilconf.go | 97 +++++++++++++++++++++++++++++++++
 1 file changed, 97 insertions(+)
 create mode 100644 contrib/config/yggdrasilconf.go

diff --git a/contrib/config/yggdrasilconf.go b/contrib/config/yggdrasilconf.go
new file mode 100644
index 00000000..12048c3a
--- /dev/null
+++ b/contrib/config/yggdrasilconf.go
@@ -0,0 +1,97 @@
+package main
+
+/*
+This is a small utility that is designed to accompany the vyatta-yggdrasil
+package. It takes a HJSON configuration file, makes changes to it based on
+the command line arguments, and then spits out an updated file.
+*/
+
+import (
+	"bytes"
+	"encoding/json"
+  "flag"
+	"fmt"
+	"io/ioutil"
+  "strconv"
+
+	"golang.org/x/text/encoding/unicode"
+	"github.com/neilalexander/hjson-go"
+
+	"yggdrasil/config"
+)
+
+type nodeConfig = config.NodeConfig
+
+func main() {
+  useconffile := flag.String("useconffile", "/etc/yggdrasil.conf", "update config at specified file path")
+  flag.Parse()
+	cfg := nodeConfig{}
+	var config []byte
+	var err error
+	config, err = ioutil.ReadFile(*useconffile)
+	if err != nil {
+		panic(err)
+	}
+	if bytes.Compare(config[0:2], []byte{0xFF, 0xFE}) == 0 ||
+		bytes.Compare(config[0:2], []byte{0xFE, 0xFF}) == 0 {
+		utf := unicode.UTF16(unicode.BigEndian, unicode.UseBOM)
+		decoder := utf.NewDecoder()
+		config, err = decoder.Bytes(config)
+		if err != nil {
+			panic(err)
+		}
+	}
+	var dat map[string]interface{}
+	if err := hjson.Unmarshal(config, &dat); err != nil {
+		panic(err)
+	}
+	confJson, err := json.Marshal(dat)
+	if err != nil {
+		panic(err)
+	}
+	json.Unmarshal(confJson, &cfg)
+  switch flag.Arg(0) {
+  case "setMTU":
+    cfg.IfMTU, err = strconv.Atoi(flag.Arg(1))
+    if err != nil {
+      cfg.IfMTU = 1280
+    }
+    if mtu, _ := strconv.Atoi(flag.Arg(1)); mtu < 1280 {
+      cfg.IfMTU = 1280
+    }
+  case "setIfName":
+    cfg.IfName = flag.Arg(1)
+  case "setListen":
+    cfg.Listen = flag.Arg(1)
+  case "setAdminListen":
+    cfg.AdminListen = flag.Arg(1)
+  case "setIfTapMode":
+    if flag.Arg(1) == "true" {
+      cfg.IfTAPMode = true
+    } else {
+      cfg.IfTAPMode = false
+    }
+  case "addPeer":
+    found := false
+    for _, v := range cfg.Peers {
+      if v == flag.Arg(1) {
+        found = true
+      }
+    }
+    if !found {
+      cfg.Peers = append(cfg.Peers, flag.Arg(1))
+    }
+  case "removePeer":
+    for k, v := range cfg.Peers {
+      if v == flag.Arg(1) {
+        cfg.Peers = append(cfg.Peers[:k], cfg.Peers[k+1:]...)
+      }
+    }
+  }
+	bs, err := hjson.Marshal(cfg)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(string(bs))
+	return
+}