bugfix: deal with duplicate MAC on LAN and WIFI

ref AREDN->ticket:115

files/etc/config.mesh/network

@@ -14,7 +14,7 @@ config interface lan
 	option netmask	<lan_mask>
 	option dns	"<wan_dns1> <wan_dns2>"
 	option gateway	<lan_gw>
-
+include /etc/aredn_include/ethmacfixup
 
 #### WAN configuration
 config interface	wan

files/etc/uci-defaults/99_setup_aredn_include

@@ -91,4 +91,34 @@ then
 
 fi
 
+# Deal with lan and wifi having same mac address (common on TP-Link)
+if [ ! -f /etc/aredn_include/ethmacfixup ]
+then
+  mkdir -p /etc/aredn_include
+  touch /etc/aredn_include/ethmacfixup
+  local lanintf=`uci -q get 'network.lan.ifname'`
+  local wifiintf=`uci -q get 'network.wifi.ifname'`
+  local lanmac=`ifconfig $lanintf | grep -o -E '([[:xdigit:]]{2}:){5}[[:xdigit:]]{2}'`
+  local wifimac=`ifconfig $wifiintf | grep -o -E '([[:xdigit:]]{2}:){5}[[:xdigit:]]{2}'`
+
+
+  if [ "$lanmac" = "$wifimac" ]
+  then
+     local wifimacdigit=`echo $wifimac | awk 'BEGIN { FS = ":" } ;{print $4}'`
+     local newmac="00:00:00:00:00:00"
+     if [ "$wifimacdigit" = "FF" ]
+     then
+       newmac=`echo "$wifimac" | awk 'BEGIN { FS = ":" } ;{print $1":"$2":"$3":00:"$5":"$6}'`
+     else
+       local wifimacdigitplusone
+       wifimacdigitplusone=`printf "%02X\n" $((0x$wifimacdigit + 1))`
+       newmac=`echo "$wifimac:$wifimacdigitplusone" | awk 'BEGIN { FS = ":" } ;{print $1":"$2":"$3":"$7":"$5":"$6}'`
+     fi
+     echo -e "\toption\tmacaddr\t$newmac" > /etc/aredn_include/ethmacfixup
+     uci -q set "network.lan.macaddr=$newmac"
+     uci commit
+     /etc/init.d/network restart
+  fi
+fi
+
 exit 0