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Allow updating IPv6 prefix only #4

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Allow updating IPv6 prefix only #4

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22 changes: 14 additions & 8 deletions dyndns.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -26,9 +26,10 @@ parameters:
optional parameters:
-t - TTL (Default: 60)
-T - Record type (Default: A)
-P - IPv6 update type (Default: empty, empty or "prefix"). Defines if only prefix should get updated.

help:
-h - Show Help
-h - Show Help

requirements:
curl, dig, jq and awk are required to run this script.
Expand All @@ -44,14 +45,15 @@ EOF
logger() {
echo ${1}: Record_Name: ${record_name} : ${2}
}
while getopts ":z:Z:r:n:t:T:h" opt; do
while getopts ":z:Z:r:n:t:T:P:h" opt; do
case "$opt" in
z ) zone_id="${OPTARG}";;
Z ) zone_name="${OPTARG}";;
r ) record_id="${OPTARG}";;
n ) record_name="${OPTARG}";;
t ) record_ttl="${OPTARG}";;
T ) record_type="${OPTARG}";;
P ) ipv6_update_type="${OPTARG}";;
h ) display_help;;
\? ) echo "Invalid option: -$OPTARG" >&2; exit 1;;
: ) echo "Missing option argument for -$OPTARG" >&2; exit 1;;
Expand All @@ -68,7 +70,7 @@ for cmd in curl dig jq awk; do
fi
done

# Check if api token is set
# Check if api token is set
if [[ "${auth_api_token}" = "" ]]; then
logger Error "No Auth API Token specified."
exit 1
Expand Down Expand Up @@ -125,7 +127,7 @@ elif [[ "${record_type}" = "A" ]]; then
else
logger Info "Current public IP address: ${cur_pub_addr}"
fi
else
else
logger Error "Only record type \"A\" or \"AAAA\" are support for DynDNS."
exit 1
fi
Expand All @@ -140,10 +142,10 @@ if [[ "${record_id}" = "" ]]; then
if [[ "${http_code}" != "200" ]]; then
logger Error "HTTP Response ${http_code} - Aborting run to prevent multipe records."
exit 1
else
else
record_id=$(echo ${record_zone} | jq | sed '$d' | jq --raw-output '.records[] | select(.type == "'${record_type}'") | select(.name == "'${record_name}'") | .id')
fi
fi
fi

logger Info "Record_ID: ${record_id}"

Expand All @@ -165,13 +167,16 @@ else
cur_dyn_addr=`curl -s "https://dns.hetzner.com/api/v1/records/${record_id}" -H 'Auth-API-Token: '${auth_api_token} | jq --raw-output '.record.value'`

logger Info "Currently set IP address: ${cur_dyn_addr}"

if [[ "${ipv6_update_type}" = "prefix" ]]; then
cur_pub_addr=$(echo "${cur_pub_addr}" | grep -oE "([0-9a-f]{0,4}:){4}")$(echo "${cur_dyn_addr}" | grep -oE "([0-9a-f]{0,4}:){3}([0-9a-f]{0,4})$")
echo "${cur_pub_addr}"
fi
# update existing record
if [[ $cur_pub_addr == $cur_dyn_addr ]]; then
logger Info "DNS record \"${record_name}\" is up to date - nothing to to."
exit 0
else
logger Info "DNS record \"${record_name}\" is no longer valid - updating record"
logger Info "DNS record \"${record_name}\" is no longer valid - updating record"
curl -s -X "PUT" "https://dns.hetzner.com/api/v1/records/${record_id}" \
-H 'Content-Type: application/json' \
-H 'Auth-API-Token: '${auth_api_token} \
Expand All @@ -189,3 +194,4 @@ else
fi
fi
fi