bsp: firstrun: Use Netplan for setting fixed MACs

Also remove `$BRANCH == dev` line since dev branch does not exist anymore

extensions/network/config-networkd/systemd/network/00-armbian-readme.network

@@ -5,4 +5,4 @@
 
 # The match section is just to ignore a warning due to empty file
 [Match]
-MACAddress=NONE.ABCD.NONE # Will never match with anything
+MACAddress=NONE.ABCD.NONE # Will never match with anything

packages/bsp/common/usr/lib/armbian/armbian-common

@@ -9,6 +9,8 @@
 # Functions:
 #
 # show_motd_warning
+# generate_random_mac
+# set_fixed_mac
 
 export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
 my_name="${0##*/}"
@@ -23,38 +25,42 @@ EOT
 chmod +x /etc/update-motd.d/90-warning
 } # show_motd_warning
 
-get_random_mac ()
+# Generate a random MAC address
+generate_random_mac ()
 {
-local prefixes=("02" "06" "0A" "0E")
-local random=$(shuf -i 0-3 -n 1)
-MACADDR=$(printf ${prefixes[$random]}':%02X:%02X:%02X:%02X:%02X\n' $[RANDOM%256] $[RANDOM%256] $[RANDOM%256] $[RANDOM%256] $[RANDOM%256])
+	# These prefixes are 4 sets of Locally Administered Address Ranges which can be used on the network without fear of conflict
+	local prefixes=("02" "06" "0A" "0E")
+	local random=$(shuf -i 0-3 -n 1)
+	MACADDR=$(printf ${prefixes[$random]}':%02X:%02X:%02X:%02X:%02X\n' $[RANDOM%256] $[RANDOM%256] $[RANDOM%256] $[RANDOM%256] $[RANDOM%256])
 }
 
-
-# set fixed IP address from first randomly assigned one. If nothing is detected, generate one.
+# Set a fixed random MAC for each Ethernet interface
 set_fixed_mac ()
 {
-	if [ -n "$(command -v nmcli)" ]; then
-		CONNECTION="$(nmcli -f UUID,ACTIVE,DEVICE,TYPE connection show --active | tail -n1)"
-		UUID=$(awk -F" " '/ethernet/ {print $1}' <<< "${CONNECTION}")
-		DEVNAME=$(awk -F" " '/ethernet/ {print $3}' <<< "${CONNECTION}")
-	else
-		DEVNAME=eth0
-	fi
-
-	MACADDR=$(/sbin/ip link | grep -A1 ${DEVNAME} | awk -F" " '/ether / {print $2}')
-
-	[[ -z $MACADDR ]] && get_random_mac
-
-	if [[ -n "$(command -v nmcli)" && -n $UUID ]]; then
-		nmcli connection modify "$UUID" ethernet.cloned-mac-address "$MACADDR"
-		nmcli connection modify "$UUID" -ethernet.mac-address ""
-		nmcli connection down "$UUID" >/dev/null 2>&1
-		nmcli connection up "$UUID" >/dev/null 2>&1
-	elif [[ -f /etc/systemd/network/$DEVNAME.network ]]; then
-		if ! grep '^ *MACAddress=' /etc/systemd/network/$DEVNAME.network > /dev/null; then
-			sed -i "s/#MACAddress=/MACAddress=$MACADDR/g" /etc/systemd/network/$DEVNAME.network
-		fi
-	fi
-	return 0
-} # set fixed mac to the 1st active network adapter
+	local netplan_config_file="/etc/netplan/20-eth-fixed-mac.yaml"
+
+	# Initialize a new Netplan config file
+	cat <<- EOF > "${netplan_config_file}"
+		network:
+		  version: 2
+		  ethernets:
+	EOF
+
+	# Iterate over each Ethernet interface
+	for iface in $(ip link show | awk '/^[0-9]+: [^:]+:/ {iface=$2; getline; if ($1 == "link/ether") print iface}' | tr -d ':')
+	do
+		generate_random_mac
+
+		# Append the MAC address configuration for the interface to the Netplan configuration file
+		cat <<- EOF >> "${netplan_config_file}"
+			    $iface:
+			      macaddress: $MACADDR
+		EOF
+	done
+
+	# Change the file permissions according to https://netplan.readthedocs.io/en/stable/security/
+	chmod 600 "${netplan_config_file}"
+
+	# Apply the Netplan configuration
+	netplan apply
+}

packages/bsp/common/usr/lib/armbian/armbian-firstrun

@@ -77,9 +77,9 @@ case "$1" in
 
 	# randomize mac in armbianEnv.txt
 	if [[ -f /boot/armbianEnv.txt ]]; then
-		get_random_mac
+		generate_random_mac
 		sed  -i "s/^ethaddr=.*/ethaddr=$MACADDR/" /boot/armbianEnv.txt
-		get_random_mac
+		generate_random_mac
 		sed  -i "s/^eth1addr=.*/eth1addr=$MACADDR/" /boot/armbianEnv.txt
 	fi
 
@@ -99,7 +99,7 @@ case "$1" in
 					sed -i "s/^PORT=.*/PORT=ttyS3/" /etc/default/ap6212
 					;;
 				"Orange Pi Zero"|"NanoPi Duo"|"Sunvell R69")
-					get_random_mac
+					generate_random_mac
 					echo "options xradio_wlan macaddr=${MACADDR}" >/etc/modprobe.d/xradio_wlan.conf
 					echo -e "\n### [firstrun] Use MAC address ${MACADDR} for Wi-Fi from now" >>${Log}
 					cd /etc/network/ && ln -sf interfaces.network-manager interfaces
@@ -129,7 +129,6 @@ case "$1" in
 
 	# varios temporary hardware workarounds
 	[[ $LINUXFAMILY == rk3399 || $LINUXFAMILY == rockchip64 ]] && [[ $BOARD != helios64 && $BOARD != khadas-edge ]] && set_fixed_mac
-	[[ $BRANCH == dev && $LINUXFAMILY == rockchip ]] && set_fixed_mac
 	[[ $LINUXFAMILY == meson ]] && set_fixed_mac
 	[[ $LINUXFAMILY == meson64 ]] && set_fixed_mac
 	systemctl disable armbian-firstrun