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49 lines
1.1 KiB
49 lines
1.1 KiB
4 weeks ago
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#!/usr/bin/env bash
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# source: https://mgergi.hu/en/it-blog/static-route-dhcp-pfsense
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check_ip(){
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local n=0 val=1
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for i in ${1//./ }; do
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[ $i -lt 0 -o $i -gt 255 ] && val=0
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n=$[n+1]
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done
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[ $n -ne 4 ] && val=0
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if [ $val -ne 1 ] ; then
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echo "Invalid IP: $1" >&2
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exit 1
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fi
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}
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to_bin(){
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local BIN=({0..1}{0..1}{0..1}{0..1}{0..1}{0..1}{0..1}{0..1})
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for i in ${1//./ }; do
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echo -n ${BIN[$i]}
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done
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}
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while [ $# -gt 0 ] ; do
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nw=${1%/*}; nm=${1#*/}; gw=$2
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check_ip $nw; check_ip $gw
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if [ ${#nm} -gt 2 ] ; then
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check_ip $nm
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nmbin=$(to_bin $nm)
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if echo $nmbin | grep -q "01" ; then
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echo "Invalid netmask: $nm" >&2
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exit 1
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else
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nmbin=${nmbin//0/}
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fi
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nm=${#nmbin}
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echo $nm
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fi
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gwhex=$(printf "%02x:%02x:%02x:%02x" ${2//./ })
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nwhex=$(printf "%02x:%02x:%02x:%02x" ${nw//./ })
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nmhex=$(printf "%02x" ${nm//./ })
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[ $nm -le 24 ] && nwhex=${nwhex%:*}
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[ $nm -le 16 ] && nwhex=${nwhex%:*}
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[ $nm -le 8 ] && nwhex=${nwhex%:*}
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echo -n $nmhex:$nwhex:$gwhex
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shift 2
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[ $# -gt 0 ] && echo -n ":"
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done
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echo
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