Introduce HIDE_LOCAL_IPV6 which removes all local ipv6 addressed from display

Author: igorpecovnik

packages/bsp/common/etc/default/armbian-motd.dpkg-dist

@@ -7,6 +7,7 @@
 MOTD_DISABLE="clear"
 ONE_WIRE=""
 HIDE_IP_PATTERN="^dummy0|^lo|^docker|^hassio|^br-|^veth|^vnet|^virbr"
+HIDE_LOCAL_IPV6="true"
 PRIMARY_INTERFACE="$(ip route | grep '^default' | sed "s/.*dev //" | cut -d" " -f1)"
 PRIMARY_DIRECTION="rx"
 STORAGE=/dev/sda1

packages/bsp/common/etc/update-motd.d/10-armbian-header

@@ -12,6 +12,7 @@
 THIS_SCRIPT="header"
 MOTD_DISABLE=""
 HIDE_IP_PATTERN="^dummy0|^lo|^docker|^hassio|^br-|^veth|^vnet|^virbr"
+HIDE_LOCAL_IPV6="true"
 
 # Read image configuration
 [[ -f /etc/armbian-image-release ]] && . /etc/armbian-image-release
@@ -85,6 +86,9 @@ function get_ip_addresses() {
 			ipv4=$(echo "${ipv4}" | cut -d'/' -f1)
 			ipv4=$(echo "${ipv4}" | awk '!x[$0]++')
 			ipv6=$(ip -6 addr show dev "${intf}")
+			if [[ "${HIDE_LOCAL_IPV6}" == true ]]; then
+				ipv6=$(ip -6 addr show dev "${intf}" | grep -v fe80)
+			fi
 			ipv6=$(echo "${ipv6}" | grep -v "${intf}:avahi")
 			ipv6=$(echo "${ipv6}" | awk '/inet6/ {print $2}')
 			ipv6=$(echo "${ipv6}" | cut -d'/' -f1)
@@ -206,9 +210,11 @@ if [[ -n "${wan_ip6_address}" && "${ipv6s}" == *${wan_ip6_address}* ]]; then
 	ipv6s=$(echo $ipv6s | sed "s/"${wan_ip6_address}"//g" | xargs )
 fi
 
-if [[ -n ${ipv6s} ]]; then
+if [[ -n ${ipv6s} || -n ${wan_ip6_address} ]]; then
 	all_ip6_address=" IPv6:         "
-	all_ip6_address+="\x1B[96m${ipv6s// /, }\x1B[0m "
+	if [[ -n ${ipv6s} ]]; then
+		all_ip6_address+="\x1B[96m${ipv6s// /, }\x1B[0m "
+	fi
 	if [[ -n ${wan_ip6_address} ]]; then
 		all_ip6_address+="\x1B[93m(WAN)\x1B[0m \x1B[95m${wan_ip6_address}\x1B[0m "
 	fi