apinger-pop for rc.local

Dealing with a race condition that comes up when there is NOT a dhcpd
server on the network. This causes the apinger template to never
become populated and thus the wifi radios remain up.

Adding the apinger template to default once to 8.8.8.8 regardless of
being triggered from the dhcp client.

Additionally, there seems to be a second race condition that if the
wireless radio is brought down too early in the startup process it
doesnt actually power down the radios. It leaves them in a weird state
of radios are up, leds are on, but the wifi cli tool thinks there off.

openwrt/Makefile

@@ -119,6 +119,7 @@ endif
 	# TODO: should do this automatically for .sh file types
 	chmod 750 $(TMPL_OUT_DIR)/root/bin/config-version.sh
 	chmod 750 $(TMPL_OUT_DIR)/root/bin/wifi-details.sh
+	chmod 750 $(TMPL_OUT_DIR)/root/bin/apinger-pop.sh
 	chmod 755 $(TMPL_OUT_DIR)/root
 	chmod 700 $(TMPL_OUT_DIR)/root/.ssh
 	chmod 640 $(TMPL_OUT_DIR)/root/.ssh/authorized_keys

openwrt/files/etc/rc.local

@@ -4,4 +4,11 @@
 # TODO make this a true service
 /root/bin/wifi-details.sh >/dev/null 2>/dev/null </dev/null &
 
+# apinger initial template population
+# this needs to remain in the case where DHCP isnt working initially
+# there is also a race condition with the wifi interfaces coming online
+# and requires a 30 sec grace period before checking via apinger. If not
+# the result is wifi is up but the wifi tool detects it as down
+(sleep 30 && /root/bin/apinger-pop.sh "8.8.8.8") &> /dev/null &
+
 exit 0

openwrt/files/etc/udhcpc.user

@@ -18,12 +18,7 @@ case "$1" in
 
     # apinger template population
     if [ ! -z "$router" ]; then
-      sed "s/<DEFAULTGATEWAY>/$router/g" /etc/apinger.tmpl > /tmp/apinger.conf
-      # Only restart apinger if compare has diff
-      if ! cmp /tmp/apinger.conf /etc/apinger.conf; then
-        # Cant use "service" since thats a shell function
-        cp /tmp/apinger.conf /etc/apinger.conf && /etc/init.d/apinger restart
-      fi
+      /root/bin/apinger-pop.sh "$router"
     fi
 
     if [ ! -z "$hostname" ]; then

openwrt/files/root/bin/apinger-pop.sh

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+if [ -z ${1} ]; then
+  echo "[ERROR] require arg for setting the gateway"
+  exit 1
+fi
+
+sed "s/<DEFAULTGATEWAY>/${1}/g" /etc/apinger.tmpl > /tmp/apinger.conf
+# Only restart apinger if compare has diff
+if ! cmp /tmp/apinger.conf /etc/apinger.conf; then
+  # Cant use "service" since thats a shell function
+  sleep 5
+  cp /tmp/apinger.conf /etc/apinger.conf && /etc/init.d/apinger restart
+fi