[add/modify] add macvlan.sh for create a macvlan network, and add this action to init.sh

update/macvlan.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+gateway=`ip route | head -n 1 | grep -Eow '([0-9]{1,3}.){3}[0-9]{1,3}'`
+[[ $gateway == '' ]] && exit 9
+
+num1=`echo $gateway | awk -F '.' '{print $1}'`
+num2=`echo $gateway | awk -F '.' '{print $2}'`
+num3=`echo $gateway | awk -F '.' '{print $3}'`
+
+for num4 in `seq 200 254`; do
+    IP=$num1'.'$num2'.'$num3'.'$num4
+    ping -c 2 $IP
+    [[ $? -ne 0 ]] && break
+done
+
+ ip link add main2wrt link enp1s0 type macvlan mode bridge
+ip addr add $IP dev main2wrt
+ip link set main2wrt up
+ip route add $IP dev main2wrt
+
+ip link set main2wrt promisc on
+