83 lines
2.4 KiB
Bash
Executable file
83 lines
2.4 KiB
Bash
Executable file
#!/bin/bash
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##
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# SDDNS update script
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#
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# @copyright 2013 Steffen Vogel
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# @license http://www.gnu.org/licenses/gpl.txt GNU Public License
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# @author Steffen Vogel <post@steffenvogel.de>
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# @link http://www.steffenvogel.de
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##
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##
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# This file is part of sddns
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#
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# sddns is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# any later version.
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#
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# sddns is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with sddns. If not, see <http://www.gnu.org/licenses/>.
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##
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################################################################################
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# Requirements
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#
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# This script requires bash, curl, dig
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#
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################################################################################
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# Settings
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# Password
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PW=Ohsongei6
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# Hostname
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HOST=sea
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# Zone
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ZONE=0l.de
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# Interface
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IF=eth0
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# Get ipv6 ip
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#IPV6=$(ip -6 -o addr show dev eth0 dynamic scope global | sed -r 's/\s+/\t/g' | cut -f4 | cut -f1 -d/)
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################################################################################
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# Expert settings
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# Time to live value in seconds for the record
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TTL=120
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# Type (A for IPv4, AAAA for IPv6)
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TYPE=AAAA
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################################################################################
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# Do not touch anything under this!
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RDATA=$(dig $TYPE $HOST.$ZONE @0l.de +short)
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# 2: eth0 inet6 2a02:908:f318:7201:52e5:49ff:feeb:740c/64 scope global dynamic valid_lft 7200sec preferred_lft 3600sec
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REGEX='^[0-9]+: +([^ ]+) +(inet6?) +([^/]+)/([0-9]+) +scope +global +dynamic +valid_lft +([0-9]+)sec +preferred_lft +([0-9]+)sec'
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ip -o monitor address | while read ACTION; do
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if [[ ${ACTION} =~ ${REGEX} ]]; then
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if [ "${RDATA}" != "${BASH_REMATCH[3]}" ]; then
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WAIT=1
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RDATA=${BASH_REMATCH[3]}
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URL="http://d.0l.de/update.txt?host=$HOST&zone=$ZONE&ttl=$TTL&class=IN&type=$TYPE&rdata=$RDATA&pw=$PW"
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echo "Updating record: $URL"
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while [ $WAIT -lt 60 ] && ! curl "$URL" 2>/dev/null | sed 's/^/ /'; do
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sleep $WAIT; # wait until interface is ready
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WAIT=$(($WAIT*2))
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done
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else
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echo "Address hasn't changed: ${RDATA}"
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fi
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fi
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done
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