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Added generic Njalla DDNS script

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Logan G 2024-11-16 18:07:58 -07:00
parent c711ffc42c
commit d03bf1f30c
Signed by: logan
GPG key ID: E328528C921E7A7A
1 changed files with 37 additions and 0 deletions
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misc/generic-njalla-ddns.sh Normal file
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#!/bin/sh
IP_TEMPFILE=/tmp/wanip
NJALLA_SUBDOMAIN="thing.com"
NJALLA_KEY="1234"
# Gets the current WAN interface and IP(s)
NET_ADDR=$(ip route get 9.9.9.9 | grep src | sed 's/.*src \(.* \)/\1/g' | cut -f1 -d ' ')
NET_ADDR6=$(ip route get 2620:fe::fe | grep src | sed 's/.*src \(.* \)/\1/g' | cut -f1 -d ' ')
if [ "$1" = "--query" ] || [ ! -f ${IP_TEMPFILE} ]; then
echo "Querying IP from DNS server"
NET_ADDR_OLD="$(nslookup -type=a ${NJALLA_SUBDOMAIN} | awk '/^Address: / { print $2 }')"
NET_ADDR6_OLD="$(nslookup -type=aaaa ${NJALLA_SUBDOMAIN} | awk '/^Address: / { print $2 }')"
if [ ! -f ${IP_TEMPFILE} ]; then
touch ${IP_TEMPFILE} || exit 1
echo "NET_ADDR_OLD=${NET_ADDR_OLD}" > $IP_TEMPFILE
echo "NET_ADDR6_OLD=${NET_ADDR6_OLD}" >> $IP_TEMPFILE
fi
else
. ${IP_TEMPFILE}
fi
if [ "$NET_ADDR" != "$NET_ADDR_OLD" ] || [ "$NET_ADDR6" != "$NET_ADDR6_OLD" ] || [ "$1" = "--force" ]; then
echo "IPv4: ${NET_ADDR_OLD} => ${NET_ADDR}"
echo "IPv6: ${NET_ADDR6_OLD} => ${NET_ADDR6}"
wget -q -O /dev/null "https://njal.la/update/?h=${NJALLA_SUBDOMAIN}&k=${NJALLA_KEY}&a=${NET_ADDR}&aaaa=${NET_ADDR6}"
STATUS=$?
if [ $STATUS -ne 0 ]; then
echo "Could not set DDNS IP! (${STATUS})"
fi
echo "NET_ADDR_OLD=${NET_ADDR}" > $IP_TEMPFILE
echo "NET_ADDR6_OLD=${NET_ADDR6}" >> $IP_TEMPFILE
fi