Rework V4 heartbeat, fixing connection bug and improving connection speed if Internet connection is available and device restricted to No VPN

device-config/2/bin/heartbeat

@@ -42,6 +42,8 @@ led5g(){
 . /etc/vpnsecret # Source the server authentication secret
 
 # Prepare for default VPN-WiFi bridge
+/sbin/uci set network.VPN360.ifname="eth1 tap0"
+/sbin/uci set network.DHCP.ifname="lo"
 /sbin/uci set wireless.@wifi-iface[0].network="VPN360"
 /sbin/uci commit
 
@@ -62,49 +64,56 @@ counter=0
 while [ $counter -lt 60 ]
  do
    # Retrieve hosts file from server
-   if /usr/bin/wget -O/etc/hosts https://$HOSTNAME/hosts --timeout=2 --post-data "secret=$SECRET" --no-check-certificate >/var/log/wget 2>&1
-    then
+    if /usr/bin/wget -O/etc/hosts https://$HOSTNAME/hosts --timeout=2 --post-data "secret=$SECRET" --no-check-certificate >/var/log/wget 2>&1
+     then
 
-     if pgrep "openvpn" >/dev/null
-      then
-       if [ $(ipaddr) ] # = If connection to the server is working
-        then
-         # Turn on LEDs indicating boot completion and connection success
-         powerled 1
-         led5g 1
+      if grep -Fq "No VPN" /etc/hosts;
+       then
+        break
+      fi
 
-         # Enable WiFi as the VPN bridge is now functional
-         startwifi
+      if pgrep "openvpn" >/dev/null
+       then
+        if [ $(ipaddr) ] # = If connection to the server is working
+         then
+          # Turn on LEDs indicating boot completion and connection success
+          powerled 1
+          led5g 1
 
-         # Send a heartbeat to the server every 10 seconds
-         # This is also used to transfer commands from the server to the device
-         while [ True ]
-          do
-           /bin/sleep 10
+          # Enable WiFi as the VPN bridge is now functional
+          startwifi
 
-           # Let's hope there is an IP address on the VPN interface
-           # If not, this might be a temporary issue (lost network connection or lease expiration)
-           # We assume that users will reboot the device if it doesn't work for extended periods of time
-           if [ $(ipaddr) ]
-            then
-             /usr/bin/wget -O- https://$HOSTNAME/heartbeat --post-data "secret=$SECRET&ip=$(ipaddr)" --no-check-certificate 2>/var/log/wget | /bin/ash
-           fi
-          done
+          # Send a heartbeat to the server every 10 seconds
+          # This is also used to transfer commands from the server to the device
+          while [ True ]
+           do
+            /bin/sleep 10
 
-       fi
-      else
-       # Launch VPN client if not running
-       /usr/sbin/openvpn /etc/openvpn/client.conf >/var/log/openvpn &
-     fi
-   fi
-   counter=$(( counter + 1 ))
-   powerled $(( counter % 2 ))
-   /bin/sleep 1 # Wait for a second before re-trying
+            # Let's hope there is an IP address on the VPN interface
+            # If not, this might be a temporary issue (lost network connection or lease expiration)
+            # We assume that users will reboot the device if it doesn't work for extended periods of time
+            if [ $(ipaddr) ]
+             then
+              /usr/bin/wget -O- https://$HOSTNAME/heartbeat --post-data "secret=$SECRET&ip=$(ipaddr)" --no-check-certificate 2>/var/log/wget | /bin/ash
+            fi
+           done
+
+        fi
+       else
+        # Launch VPN client if not running
+        /usr/sbin/openvpn /etc/openvpn/client.conf >/var/log/openvpn &
+      fi
+    fi
+    counter=$(( counter + 1 ))
+    powerled $(( counter % 2 ))
+    /bin/sleep 1 # Wait for a second before re-trying
   done
 
 # We should only ever get to this point if no VPN connection was established within a minute
 
 # Switch WiFi device to the DHCP bridge
+/sbin/uci set network.VPN360.ifname="tap0"
+/sbin/uci set network.DHCP.ifname="eth1"
 /sbin/uci set wireless.@wifi-iface[0].network="DHCP"
 /sbin/uci commit