usb_direct: fix netmon script when bonding is enabled

SD_ROOT/wz_mini/usr/bin/netmon.sh

@@ -1,14 +1,91 @@
 #!/bin/sh
 
+set -x
+
 . /opt/wz_mini/wz_mini.conf
 . /opt/wz_mini/etc/rc.common
 
-if [[ "$ENABLE_USB_DIRECT" == "true" ]]; then
-	wait_for_wlan_ip $(basename "$0")
-	sleep 5
-	gateway_supervisor $(basename "$0") &
-fi
+wait_for_wlan_ip $(basename "$0")
 
-echo "kill udhcpc extra"
-kill $(pgrep -f 'udhcpc -i wlan0 -H WyzeCam')
+sleep 30
 
+echo "kill icamera udhcpc extra"
+kill $(pgrep -f 'udhcpc -i wlan0 -H WyzeCam -p /var/run/udhcpc.pid -b')
+
+# Specify the interfaces
+MAIN="usb0"
+BACKUP="wlan_old"
+BOND="wlan0"
+
+# Specify the log file
+LOGFILE="/opt/wz_mini/log/netmon.log"
+
+gateway_supervisor() {
+    # Get the default gateway
+    GATEWAY=$(/opt/wz_mini/tmp/.bin/ip route show default | awk '/default/ {print $3}')
+
+    # Initialize variables
+    is_interface_down=0
+    attempt=0
+
+    # Check if the gateway can be reached
+    while true; do
+        if /opt/wz_mini/tmp/.bin/ifconfig $MAIN | grep -q "UP"; then
+            is_interface_down=0
+            echo "$(date) - Interface $MAIN is up." >> $LOGFILE
+        fi
+
+        if [ $is_interface_down -eq 0 ]; then
+            attempt=$((attempt+1))
+            if /opt/wz_mini/tmp/.bin/ping -c 1 $GATEWAY > /dev/null 2>&1; then
+                echo "$(date) - Internet connection is active." >> $LOGFILE
+                attempt=0
+            else
+                echo "$(date) - Attempt $attempt: Internet connection is down." >> $LOGFILE
+                if [ $attempt -ge 10 ]; then
+                    /opt/wz_mini/tmp/.bin/ifconfig $MAIN down
+                    echo "$(date) - Interface $MAIN has been brought down." >> $LOGFILE
+                    is_interface_down=1
+                fi
+            fi
+        else
+            if /opt/wz_mini/tmp/.bin/ifconfig $MAIN | grep -q "UP"; then
+                is_interface_down=0
+                echo "$(date) - Interface $MAIN is up." >> $LOGFILE
+                attempt=0
+            fi
+        fi
+
+        sleep 5
+    done
+}
+
+monitor_bond() {
+    # Initial active interface
+    active_interface=$(cat /proc/net/bonding/$BOND | grep "Currently Active Slave" | awk '{print $4}')
+
+    while true; do
+        # Current active interface
+        current_interface=$(cat /proc/net/bonding/$BOND | grep "Currently Active Slave" | awk '{print $4}')
+
+        if [ "$active_interface" != "$current_interface" ]; then
+            echo "$(date) - Network interface switched from $active_interface to $current_interface." >> $LOGFILE
+
+            # Kill any running udhcpc processes
+            killall udhcpc
+
+            # Start a new udhcpc client
+            udhcpc -i wlan0 -p /var/run/udhcpc.pid -b -S
+
+            # Update the active interface
+            active_interface=$current_interface
+        fi
+
+        # Sleep for 15 seconds before checking again
+        sleep 15
+    done
+}
+
+# Start both functions in the background
+gateway_supervisor &
+monitor_bond &