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NeoNetwork/scripts/dns-reverse-generator.sh
2020-05-12 21:20:53 +08:00

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#!/usr/bin/env bash
set -e
FILE="dns/db.10.127"
LO_TEMP="$(mktemp)"
if [[ "$(uname)" = *BSD ]]; then
TAC=gtac
else
TAC=tac
fi
print_record()
{
printf "%s\tIN\tPTR\t%s\n" "$1" "$2"
}
ipcalc()
{
local subnet="$1"
local add="$2"
REV="$(echo -n "${subnet%,*}." | "$TAC" -s .)"
REV="${REV%.*.*.}"
echo "$[ ${REV%.*} + $add ].${REV#*.}"
}
# PROGRAM BEGIN
sed -i '/AUTOGENERATED/,$d' "$FILE"
echo '; AUTOGENERATED' >> "$FILE"
(
cd route
for i in *; do
source "$i"
if [ "$TYPE" = "LO" ]; then
ip="${i/,32/}"
print_record "$(ipcalc "$ip" 0)" "$NAME.neo" >> "$LO_TEMP"
fi
done
)
{
echo -e "\n; Loopback Addresses"
sort -n < "$LO_TEMP"
} >> "$FILE"
rm -f "$LO_TEMP"