WIFI-2416 Automatically get redirector from DigiCert

Signed-off-by: Rick Sommerville <rick.sommerville@netexperience.com>

feeds/wlan-ap/opensync/files/bin/wlan_ap_redirector.sh

@@ -1,12 +1,45 @@
 #!/bin/sh
 
-if [ $# -ne 1 ] ; then
-	echo "Usage: $0 <redirector address>" >&2
+AP_PRIVATE_KEY_FILE="/usr/opensync/certs/client_dec.key"
+AP_CERTIFICATE_FILE="/usr/opensync/certs/client.pem"
+AP_DEVICE_ID_FILE="/usr/opensync/certs/client_deviceid.txt"
+DIGICERT_API_URI="clientauth.one.digicert.com"
+
+if [ "$1" = "-h" ]; then
+  echo "Usage: $0 [redirector address]" >&2
   exit 1
 fi
 
-redirector_addr=$1
+# Query DigiCert's API if redirector wasn't specified
+if [ -z "$1" ]; then
+  if [ ! -f "$AP_DEVICE_ID_FILE" ]; then
+      echo "Device ID file $AP_DEVICE_ID_FILE does not exist. Make sure to create it or specify the redirector address manually."
+      exit 1
+  fi
+
+  # TODO: this command should be retried if it fails
+  digicert_device_id=`cat ${AP_DEVICE_ID_FILE}`
+  device_data=`curl -s \
+    --key "${AP_PRIVATE_KEY_FILE}" \
+    --cert "${AP_CERTIFICATE_FILE}" \
+    "https://${DIGICERT_API_URI}/iot/api/v2/device/${digicert_device_id}"`
+
+  controller_url=`echo ${device_data} | jsonfilter -e '@.fields[@.name="Redirector"].value'`
+  if [ -z "$controller_url" ]; then
+    echo "No redirector found for this device"
+    exit 1
+  fi
+  controller_port=`echo ${controller_url} | cut -d ":" -f2)`
+  if [ -z "$controller_port" ]; then
+    redirector_addr="ssl:${controller_url}:6643"
+  else
+    redirector_addr="ssl:${controller_url}"
+  fi
+else
+  redirector_addr=$1
+fi
 
 uci set system.tip.redirector="${redirector_addr}"
+uci set system.tip.deployed=0
 uci commit system
 /etc/init.d/opensync restart

feeds/wlan-ap/opensync/src/platform/openwrt/rootfs/common/etc/init.d/opensync

@@ -37,6 +37,14 @@ start_service() {
     echo "Setting certificates"
     mkdir -p ${CERTS_DEST_PATH}
     cp ${CERTS_SRC_PATH}/* ${CERTS_DEST_PATH}/
+    echo "Checking Redirector"
+    redirector=$(uci get system.tip.redirector)
+    if [ -z "$redirector" ]; then
+        logger -t opensync "Contacting DigiCert for redirector address"
+        wlan_ap_redirector.sh
+    else
+        logger -t opensync "Redirector address is ${redirector}"
+    fi
     echo "Starting OpenSync"
     procd_set_param command ${PROG}
     procd_close_instance