Improve formatting and add internet check

modules/responder

@@ -1,5 +1,5 @@
 #!/bin/bash /usr/lib/turtle/turtle_module
-VERSION="2.2"
+VERSION="2.3"
 DESCRIPTION="Responder - LLMNR, NBT-NS and MDNS poisoner"
 CONF=/tmp/responder.form
 AUTHOR=IMcPwn
@@ -37,18 +37,21 @@ function start {
   
     if [[ ! $(opkg list-installed | grep git) ]];
     then
+      check_internet
       echo "Git not installed. Installing..."
       opkg update && opkg install git
     fi
     
     if [[ ! $(opkg list-installed | grep python-sqlite3) ]];
     then
+      check_internet
       echo "Python-sqlite3 not installed. Installing..."
       opkg update && opkg install python-sqlite3
     fi
     
     if [[ ! -d /etc/turtle/Responder || ! -s /etc/turtle/Responder/Responder.py || ! -s /etc/turtle/Responder/Responder.conf ]];
     then
+      check_internet
       rm -rf /etc/turtle/Responder
       echo "Responder not downloaded or corrupted. Downloading..."
       git clone git://github.com/SpiderLabs/Responder /etc/turtle/Responder
@@ -189,6 +192,14 @@ function status {
   if ps | grep -w -q [/]etc/turtle/Responder/Responder.py; then echo "1"; else echo "0"; fi
 }
 
+function check_internet {
+    ping -q -w 5 -c 1 lanturtle.com &> /dev/null && {
+        :
+    } || {
+	echo -e "The LAN Turtle is currently offline. Responder requires\nan internet connection to install dependencies."
+        exit 1
+    }
+}
 
 function log {
 dialog --ok-label "Submit" \