#!/bin/bash
#
# This script creates sample default system-connections files
# in /etc/NetworkManager/system-connections/ based on your current
# ethernet and wireless devices.
#
# You can skip it if you prefer to configure them yourself
# by creating the ini-files, via nmcli(1) or the networkmanager applet
#
# Note:
# You may override the default ssid by doing:
#
# ssid=my_wifi sh post-install

# workaround prt-get shortcoming
if [ -z "$BASH_VERSION" ]; then
	echo "Running /bin/bash $0 $@"
	exec /bin/bash $0 "$@"
fi

ssid="${ssid:-at_STARBUCKS_Wi2}"
name="${name:-Wireless connection for $ssid}"

PATH=/sbin:/usr/sbin:/bin:/usr/bin
umask 077

shopt -s nullglob

# Generate config for each device
for sysdir in /sys/class/net/enp* /sys/class/net/eth* /sys/class/net/wlp* /sys/class/net/wlan*; do
	iface=${sysdir##*/}
	cfg=/etc/NetworkManager/system-connections/$iface
	if [ -f $cfg ]; then
		echo "Skipping $iface: $cfg found"
		continue
	fi
	echo "Generating sample config: $cfg"
	macaddr=$(<$sysdir/address)
	uuid=$(uuidgen)
	timestamp=$(date +%s)
	case $iface in
	eth*|enp*)
		cat > $cfg << EOF
[connection]
name=Wired connection $iface
id=$iface
uuid=$uuid
type=802-3-ethernet
autoconnect=true
timestamp=$timestamp

[802-3-ethernet]
mac-address=$macaddr

[ipv4]
method=auto
EOF
		;;
	wlan*|wlp*)
		# Convert ssid to an array of bytes
		ssid_bytes=$(perl -e 'print "$_;" foreach unpack("C*", $ARGV[0])' $ssid)
		cat > $cfg << EOF
[connection]
name=$name
id=$iface
uuid=$uuid
type=802-11-wireless
# the string below is: $ssid
ssid=$ssid_bytes
autoconnect=true
timestamp=$timestamp
# security=802-11-wireless-security

[802-11-wireless]
mac-address=$macaddr

[802-11-wireless-security]
key-mgmt=wpa-psk
psk=secret

[ipv4]
method=auto
EOF
		;;
	esac
done