#!/usr/bin/env bash
set -e

IPTOOL="$PWD/Misc/C/ip"

TUN30_TEMP="$(mktemp)"
PP_TEMP="$(mktemp)"
LO_TEMP="$(mktemp)"

if [ ! -x "$IPTOOL" ]; then
	echo "You need to build Misc/C/ip first"
	exit 1
fi

print_record()
{
	printf "%s\tIN\tPTR\t%s\n" "$1" "$2"
}

sed -i '/AUTOGENERATED/,$d' dns/db.10.127
echo '; AUTOGENERATED' >> dns/db.10.127

(
cd route
for i in *; do
	source "$i"
	if [ "$TYPE" = "TUN30" ]; then
		upstream_ip=$("$IPTOOL" "$i" 1)
		downstream_ip=$("$IPTOOL" "$i" 2)

		(
		print_record "$upstream_ip" "$DOWNSTREAM.$UPSTREAM.tun30.neo."
		print_record "$downstream_ip" "$UPSTREAM.$DOWNSTREAM.tun30.neo."
		) >> "$TUN30_TEMP"
	elif [ "$TYPE" = "PP" ]; then
		i="${i/PP,/}"
		upstream_ip="${i%~*}"
		downstream_ip="${i#*~}"

		(
		print_record "$("$IPTOOL" "$upstream_ip" 0)" "$UPSTREAM.ptp.neo."
		print_record "$("$IPTOOL" "$downstream_ip" 0)" "$DOWNSTREAM.ptp.neo."
		) >> "$PP_TEMP"
	elif [ "$TYPE" = "LO" ]; then
		ip="${i/,32/}"

		print_record "$("$IPTOOL" "$ip" 0)" "$NAME.neo" >> "$LO_TEMP"
	fi
done
)

{
	echo -e "\n; Tunnel /30 Addresses"
	sort -n < "$TUN30_TEMP"
	echo -e "\n; Point to Point Addresses"
	sort -n < "$PP_TEMP"
	echo -e "\n; Loopback Addresses"
	sort -n < "$LO_TEMP"
} >> dns/db.10.127

rm -f "$TUN30_TEMP" "$PP_TEMP" "$LO_TEMP"