mailinabox/tools/dyndns/dyndns.sh

202 lines
6.6 KiB
Bash
Executable File

#!/bin/bash
# based on dm-dyndns v1.0, dmurphy@dmurphy.com
# Shell script to provide dynamic DNS to a mail-in-the-box platform.
# Requirements:
# dig installed
# curl installed
# oathtool installed if totp is to be used
# OpenDNS myip service availability (myip.opendns.com 15)
# Mailinabox host (see https://mailinabox.email 2)
# Mailinabox admin username/password in the CFGFILE below
# one line file of the format (curl cfg file):
# user = “username:password”
# Dynamic DNS name to be set
# DYNDNSNAMELIST file contains one hostname per line that needs to be set to this IP.
#----- Contents of dyndns.cfg file below ------
#----- user credentials -----------------------
#user = "admin@mydomain.com:MYADMINPASSWORD"
#----- Contents of dyndns.domain below --------
#<miabdomain.tld>
#------ Contents of dyndns.dynlist below ------
#vpn.mydomain.com
#nas.mydomain.com
#------ Contents of dyndns.totp ---------------
#- only needed in case of TOTP authentication -
#TOTP_KEY=ABCDEFGABCFEXXXXXXXX
MYNAME="dyndns"
CFGFILE="$MYNAME.cfg"
TOTPFILE="$MYNAME.totp"
DOMFILE="$MYNAME.domain"
DIGCMD="/usr/bin/dig"
CURLCMD="/usr/bin/curl"
CATCMD="/bin/cat"
OATHTOOLCMD="/usr/bin/oathtool"
DYNDNSNAMELIST="$MYNAME.dynlist"
if [ ! -x $DIGCMD ]; then
echo "$MYNAME: dig command $DIGCMD not found. Check and fix please."
exit 99
fi
if [ ! -x $CURLCMD ]; then
echo "$MYNAME: curl command $CURLCMD not found. Check and fix please."
exit 99
fi
if [ ! -x $CATCMD ]; then
echo "$MYNAME: cat command $CATCMD not found. Check and fix please."
exit 99
fi
DOMAIN=$(cat $DOMFILE)
MIABHOST="box.$DOMAIN"
noww="$(date +"%F %T")"
echo "$noww: running dynamic dns update for $DOMAIN"
if [ ! -f $CFGFILE ]; then
echo "$MYNAME: $CFGFILE not found. Check and fix please."
exit 99
fi
if [ ! -f $DYNDNSNAMELIST ]; then
echo "$MYNAME: $DYNDNSNAMELIST not found. Check and fix please."
exit 99
fi
MYIP="`$DIGCMD +short myip.opendns.com @resolver1.opendns.com`"
if [ -z "MYIP" ]; then
MYIP="`$DIGCMD +short myip.opendns.com @resolver2.opendns.com`"
fi
if [ -z "MYIP" ]; then
MYIP="`$DIGCMD +short myip.opendns.com @resolver3.opendns.com`"
fi
if [ -z "MYIP" ]; then
MYIP="`$DIGCMD +short myip.opendns.com @resolver4.opendns.com`"
fi
if [ -z "$MYIP" ]; then
MYIP=$($DIGCMD -4 +short TXT o-o.myaddr.l.google.com @ns1.google.com | tr -d '"')
fi
if [ ! -z "$MYIP" ]; then
for DYNDNSNAME in `$CATCMD $DYNDNSNAMELIST`
do
PREVIP="`$DIGCMD A +short $DYNDNSNAME @$MIABHOST`"
if [ -z "$PREVIP" ]; then
echo "$MYNAME: dig output was blank."
fi
if [ "x$PREVIP" = "x$MYIP" ]; then
echo "$MYNAME: $DYNDNSNAME ipv4 hasn't changed."
else
echo "$MYNAME: $DYNDNSNAME changed (previously: $PREVIP, now: $MYIP)"
STATUS="`$CURLCMD -X PUT -K $CFGFILE -s -d $MYIP https://$MIABHOST/admin/dns/custom/$DYNDNSNAME/A`"
case $STATUS in
"OK") echo "$MYNAME: mailinabox API returned OK, cmd succeeded but no update.";;
"updated DNS: $DOMAIN") echo "$MYNAME: mailinabox API updated $DYNDNSNAME ipv4 OK.";;
"invalid-totp-token"|"missing-totp-token") echo "$MYNAME: invalid TOTP token. Retrying with TOTP token"
if [ ! -x $AOTHTOOLCMD ]; then
echo "$MYNAME: oathtool command $OATHTOOLCMD not found. Check and fix please."
exit 99
fi
if [ ! -f $TOTPFILE ]; then
echo "$MYNAME: $TOTPFILE not found. Check and fix please."
exit 99
fi
source $TOTPFILE
TOTP="X-Auth-Token: $(oathtool --totp -b -d 6 $TOTP_KEY)"
STATUST="`$CURLCMD -X PUT -K $CFGFILE -H "$TOTP" -s -d $MYIP https://$MIABHOST/admin/dns/custom/$DYNDNSNAME/A`"
case $STATUST in
"OK") echo "$MYNAME: mailinabox API returned OK, cmd succeded but no update.";;
"updated DNS: $DOMAIN") echo "$MYNAME: mailinabox API updated $DYNDNSNAME ipv4 OK.";;
"invalid-totp-token") echo "$MYNAME: invalid TOTP token.";;
*) echo "$MYNAME: other status from mailinabox API. Please check: $STATUST (2)";;
esac
;;
*) echo "$MYNAME: other status from mailinabox API. Please check: $STATUS (1)";;
esac
fi
done
else
echo "$MYNAME: No ipv4 address found. Check myaddr.google and myip.opendns.com services."
exit 99
fi
# Now to do the same for ipv6
MYIP="`$DIGCMD AAAA @resolver1.ipv6-sandbox.opendns.com myip.opendns.com +short -6`"
if [ -z "MYIP" ]; then
MYIP="`$DIGCMD AAAA @resolver2.ipv6-sandbox.opendns.com myip.opendns.com +short -6`"
fi
if [ -z "$MYIP" ]; then
MYIP=$($DIGCMD -6 +short TXT o-o.myaddr.l.google.com @ns1.google.com | tr -d '"')
fi
if [ ! -z "$MYIP" ]; then
for DYNDNSNAME in `$CATCMD $DYNDNSNAMELIST`
do
PREVIP="`$DIGCMD AAAA +short $DYNDNSNAME @$MIABHOST`"
if [ -z "$PREVIP" ]; then
echo "$MYNAME: dig output was blank."
fi
if [ "x$PREVIP" = "x$MYIP" ]; then
echo "$MYNAME: $DYNDNSNAME ipv6 hasn't changed."
else
echo "$MYNAME: $DYNDNSNAME changed (previously: $PREVIP, now: $MYIP)"
STATUS="`$CURLCMD -X PUT -K $CFGFILE -s -d $MYIP https://$MIABHOST/admin/dns/custom/$DYNDNSNAME/AAAA`"
case $STATUS in
"OK") echo "$MYNAME: mailinabox API returned OK, cmd succeeded but no update.";;
"updated DNS: $DOMAIN") echo "$MYNAME: mailinabox API updated $DYNDNSNAME ipv6 OK.";;
"invalid-totp-token"|"missing-totp-token") echo "$MYNAME: invalid TOTP token. Retrying with TOTP token"
if [ ! -x $AOTHTOOLCMD ]; then
echo "$MYNAME: oathtool command $OATHTOOLCMD not found. Check and fix please."
exit 99
fi
if [ ! -f $TOTPFILE ]; then
echo "$MYNAME: $TOTPFILE not found. Check and fix please."
exit 99
fi
source $TOTPFILE
TOTP="X-Auth-Token: $(oathtool --totp -b -d 6 $TOTP_KEY)"
STATUST="`$CURLCMD -X PUT -K $CFGFILE -H "$TOTP" -s -d $MYIP https://$MIABHOST/admin/dns/custom/$DYNDNSNAME/AAAA`"
case $STATUST in
"OK") echo "$MYNAME: mailinabox API returned OK, cmd succeded but no update.";;
"updated DNS: $DOMAIN") echo "$MYNAME: mailinabox API updated $DYNDNSNAME ipv6 OK.";;
"invalid-totp-token") echo "$MYNAME: invalid TOTP token.";;
*) echo "$MYNAME: other status from mailinabox API. Please check: $STATUST (2)";;
esac
;;
*) echo "$MYNAME: other status from mailinabox API. Please check: $STATUS (1)";;
esac
fi
done
else
echo "$MYNAME: No ipv6 address found. Check myaddr.google and myip.opendns.com services."
exit 99
fi
exit 0