Add wrigley-diag.sh for LTE logging

Enables port forwarding so that the LTE PC logger can talk to the LTE
card through the T20.

Change-Id: Id4ea9b0057c22a1e1f4193e1bb8e91dab8ca45ff

device.mk

@@ -18,6 +18,7 @@ $(call inherit-product, device/moto/wingray/device_base.mk)
 
 PRODUCT_COPY_FILES += \
     device/moto/stingray/ril/tty2ttyd:system/bin/tty2ttyd \
+    device/moto/stingray/ril/wrigley-diag.sh:system/bin/wrigley-diag.sh \
     device/moto/stingray/apns-conf.xml:system/etc/apns-conf.xml
 
 ifneq ($(AP_RIL_BLDSRC),1)

ril/wrigley-diag.sh

@@ -0,0 +1,24 @@
+#!/system/bin/sh
+
+isBlanFound=0
+
+for iface in `ls /sys/class/net` ; do
+    desc=`cat /sys/class/net/$iface/description`
+    case $desc in
+        "Motorola BLAN Interface")
+            echo "Found Motorola BLAN at $iface"
+            echo "Forwarding ports for Wrigley diagnostics"
+            echo 1 > /proc/sys/net/ipv4/ip_forward;
+            /system/bin/iptables -t nat -A PREROUTING -p tcp -i $iface -d 192.168.16.2 --dport 11006 -j DNAT --to 192.168.20.2:11006;
+            /system/bin/iptables -A FORWARD -p tcp -i $iface -d 192.168.20.2 --dport 11006 -j ACCEPT;
+            isBlanFound=1;
+            break
+        ;;
+        *)
+            echo "$iface is not the Motorola BLAN";
+            continue
+        ;;
+    esac
+done
+
+case $isBlanFound in 0) echo "Could not find Motorola BLAN";; esac