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|
#!/bin/bash
# version #VERSION#
set -e
stty &> /dev/null || \
sleep $[$RANDOM%60]
if ! ipCmd="$(which ip 2> /dev/null)"
then
for p1 in / /usr/
do
for p2 in bin/ sbin/
do
ipCmd="${p1}${p2}ip"
[ -x "${ipCmd}" ] && break
done
[ -x "${ipCmd}" ] && break
done
fi
i=0
while read -r ipVer updateUrl dnsName
do
if [[ "${ipVer}" = '#'* ]] || [ -z "${ipVer}" ]
then
continue
fi
if [ "${ipVer}" == '4' ]
then
dnsVers[${i}]='A'
inetVers[${i}]='inet'
ipCmdVers[${i}]='-4'
elif [ "${ipVer}" == '6' ]
then
dnsVers[${i}]='AAAA'
inetVers[${i}]='inet6'
ipCmdVers[${i}]='-6'
elif [ "${ipVer}" == '46' ] || [ "${ipVer}" == '64' ]
then
dnsVers[${i}]='A'
inetVers[${i}]='inet'
ipCmdVers[${i}]='-4'
updateUrls[${i}]="${updateUrl}"
dnsNamen[${i}]="${dnsName}"
i=$[${i}+1]
dnsVers[${i}]='AAAA'
inetVers[${i}]='inet6'
ipCmdVers[${i}]='-6'
else
>&2 echo 'Error: First column in "#ETCDIR#/update-ddns.conf" needs to be "4", "6", "46" or "64"!'
exit 1
fi
updateUrls[${i}]="${updateUrl}"
dnsNamen[${i}]="${dnsName}"
i=$[${i}+1]
done < #ETCDIR#/update-ddns.conf
for dnsName in $( \
echo "${dnsNamen[@]}" | \
tr ' ' '\n' | \
sort -u
)
do
unset updateIps
unset updateUrl
unset curlForceIpVer
needsUpdate=false
for ((j=0; j<${i}; j++))
do
[ "${dnsName}" != "${dnsNamen[${j}]}" ] && continue
updateUrl="${updateUrls[${j}]}"
if [[ "${dnsName}" == *'/'* ]]
then
dnsIps="$(
curl ${ipCmdVers[${j}]} "${dnsName}" 2> /dev/null
)"
ips='1'
updateIps="${updateIps}"',auto'
if [ -n "${curlForceIpVer}" ] && [ "${curlForceIpVer}" != "${ipCmdVers[${j}]}" ]
then
>&2 echo 'FEHLER: Ich kann nicht zwei verschiedene IP-Versionen automatisch ermitteln lassen (weil das Erich nicht braucht).'
exit 1
fi
curlForceIpVer="${ipCmdVers[${j}]}"
else
dnsIps="$(
dig $1 "${dnsName}" ${dnsVers[${j}]} | \
grep -v '^\s*\(;\|$\)' | \
grep "\s${dnsVers[${j}]}\s" | \
awk '{print $5}' | \
sort -u
)"
ips="$(
"${ipCmd}" -o ${ipCmdVers[${j}]} addr show scope global | \
awk '{print $4}' | \
cut -d/ -f1 | \
sort -u
)"
if [ $(echo "${ips}" | wc -l) -eq 0 ]
then
updateIps="${updateIps}"',auto'
if [ -n "${curlForceIpVer}" ] && [ "${curlForceIpVer}" != "${ipCmdVers[${j}]}" ]
then
>&2 echo 'FEHLER: Ich kann nicht zwei verschiedene IP-Versionen automatisch ermitteln lassen (weil das Erich nicht braucht).'
exit 1
fi
curlForceIpVer="${ipCmdVers[${j}]}"
else
updateIps="${updateIps},$(echo -n "${ips}" | tr '\n' ',')"
fi
fi
if [ "${dnsIps}" != "${ips}" ]
then
needsUpdate=true
fi
done
if ${needsUpdate}
then
if [[ "${updateUrl}" = *'?'* ]]
then
updateIps='&address='"${updateIps#,}"
else
updateIps='?address='"${updateIps#,}"
fi
curl ${curlForceIpVer} -sS "${updateUrl}${updateIps}" 2> /dev/null
fi
done
|
