migrate git repo to repo-format 0

update_netcup_ddns.sh

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+#!/usr/bin/env bash
+
+# This script will update given netcup domain dns record with the actual ip of the calling service
+# Parameters:
+# IPVERSION: 4 or 6
+# DOMAIN_NAME: the zone name eg. test.com
+# DNS_RECORD_ID: the id of the dns record that should be updated
+# HOSTNAMERECORD: the hostname in domain
+# NC_Apikey: Api Key from your netcup account
+# NC_Apipw: Api password from your netcup account
+# NC_CID: Customer ID from your netcup account
+
+IPVERSION=$1
+DOMAIN_NAME=$2
+DNS_RECORD_ID=$3
+HOSTNAMERECORD=$4
+NC_Apikey=$5
+NC_Apipw=$6
+NC_CID=$7
+NC_ENDPOINT='https://ccp.netcup.net/run/webservice/servers/endpoint.php?JSON'
+CACHE_PATH="/var/cache/update_netcup_ddns"
+
+usage() {
+  #
+  # Displays usage of script
+  #
+  #   returns usage
+  #
+
+  echo
+  echo "./update_netcup_ddns.sh <IPVERSION> <DOMAIN_NAME> <DNS_RECORD_ID> <HOSTNAMERECORD> <NC_Apikey> <NC_Apipw> <NC_CID>"
+  echo
+}
+
+query_ip_address() {
+  #
+  # Queries the IP address in use
+  #
+  #   returns IP address or exits with log message
+  #
+
+  local IPVERSION=$1
+  local CACHE_PATH=$2
+
+  case $IPVERSION in
+    4)
+      QUERY_ADDRESS=$(curl -s -4 -q v4.ident.me | grep -oE '((1?[0-9][0-9]?|2[0-4][0-9]|25[0-5])\.){3}(1?[0-9][0-9]?|2[0-4][0-9]|25[0-5])')
+      STATEFILE="$CACHE_PATH/ddns_state_ipv"$IPVERSION"_$DOMAIN_NAME.txt"
+      ;;
+    6)
+      QUERY_ADDRESS=$(curl -s -6 -q v6.ident.me | grep -oE '^([0-9a-fA-F]{1,4}:){7}[0-9a-fA-F]{1,4}$')
+      STATEFILE="$CACHE_PATH/ddns_state_ipv"$IPVERSION"_$DOMAIN_NAME.txt"
+      ;;
+    *)
+      usage
+      exit 1
+      ;;
+  esac
+
+  if [ ! -d $CACHE_PATH ]; then mkdir -p $CACHE_PATH; fi
+  if [ ! -f $STATEFILE ]; then touch $STATEFILE; fi
+
+  if [ ! -z $QUERY_ADDRESS ]; then
+    echo $QUERY_ADDRESS
+  else
+    logger -t $(basename $0) -p user.err "Unable to query IP address"
+    exit 255;
+  fi
+}
+
+get_auth_token() {
+  #
+  # Get auth token
+  #
+  #   returns auth_token
+  #
+
+  echo $(curl -s -X POST \
+      $NC_ENDPOINT \
+      --header 'Accept: */*' \
+      --header 'Content-Type: application/json' \
+      --data-raw '{
+      "action":"login",
+      "param":{
+          "apikey": "'$NC_Apikey'",
+          "apipassword": "'$NC_Apipw'",
+          "customernumber": "'$NC_CID'"
+      }
+  }')
+}
+
+determine_record_type() {
+  #
+  # Determine dns record type
+  #
+  #   returns dns record type (currently support A and AAAA)
+  #
+
+  local IPVERSION=$1
+
+  if [ $IPVERSION -eq 4 ]; then
+    RECORDTYPE="A"
+  elif [ $IPVERSION -eq 6 ]; then
+    RECORDTYPE="AAAA"
+  else
+    logger -t $(basename $0) -p user.err "Could not determine IP version. Exiting"
+    exit 1
+  fi
+
+  echo $RECORDTYPE
+}
+
+get_ip_from_state() {
+  #
+  # Get IP address currently set in DNS
+  #
+  #   returns address set in DNS
+  #
+
+#  local IPVERSION=$1
+#  local CACHE_PATH=$2
+#
+#  STATEFILE="$CACHE_PATH/ddns_state_ipv"$IPVERSION"_$DOMAIN_NAME.txt"
+#  LAST_ADDRESS=$(<$STATEFILE)
+#
+#  echo $LAST_ADDRESS
+
+  sid=$(get_auth_token | tr '{}' '\n' | grep apisessionid | cut -d '"' -f 4)
+  curl -s -X POST \
+      $NC_ENDPOINT \
+      --header 'Accept: */*' \
+      --header 'Content-Type: application/json' \
+      --data-raw '{
+      "action":"infoDnsRecords",
+      "param":{
+          "apikey": "'$NC_Apikey'",
+          "apisessionid": "'$sid'",
+          "customernumber": "'$NC_CID'",
+          "clientrequestid": "",
+          "domainname": "'$DOMAIN_NAME'"
+      }
+  }' | jq -r '.responsedata.dnsrecords[] | select(.id == "'$DNS_RECORD_ID'") | .destination'
+}
+
+update_dns_record() {
+  #
+  # Update DNS record
+  #
+  #   returns the IP address updated in DNS
+  #
+
+  update=$(curl -s -X POST \
+      $NC_ENDPOINT \
+      --header 'Accept: */*' \
+      --header 'Content-Type: application/json' \
+      --data-raw '{
+      "action":"updateDnsRecords",
+      "param":{
+          "apikey": "'$NC_Apikey'",
+          "apisessionid": "'$sessionid'",
+          "customernumber": "'$NC_CID'",
+          "clientrequestid": "",
+          "domainname": "'$DOMAIN_NAME'",
+          "dnsrecordset": {
+          "dnsrecords": [
+              {
+                "id": "'$DNS_RECORD_ID'",
+                "hostname": "'$HOSTNAMERECORD'",
+                "type": "'$(determine_record_type $IPVERSION)'",
+                "destination": "'$QUERIED_ADDRESS'"
+              }
+            ]
+        }
+      }
+  }')
+
+  echo $update | jq -r '.responsedata.dnsrecords[] | select(.id == "'$DNS_RECORD_ID'") | .destination'
+}
+
+QUERIED_ADDRESS=$(query_ip_address $IPVERSION "$CACHE_PATH")
+LAST_ADDRESS=$(get_ip_from_state)
+
+# If IP address hasn't changed, exit, otherwise save the new IP
+if [ "$QUERIED_ADDRESS" == "$LAST_ADDRESS" ]; then
+  logger -t $(basename $0) -p user.notice "No update necessary for $HOSTNAMERECORD.$DOMAIN_NAME ($(determine_record_type $IPVERSION))!"
+  exit 0
+fi
+
+echo $QUERIED_ADDRESS > "$CACHE_PATH/ddns_state_ipv"$IPVERSION"_$DOMAIN_NAME.txt"
+
+sessionid=$(get_auth_token | tr '{}' '\n' | grep apisessionid | cut -d '"' -f 4)
+if [ "$sessionid" = "" ]; then
+    logger -t $(basename $0) -p user.err "SessionID was empty. Login failed."
+    exit 1
+fi
+logger -t $(basename $0) -p user.notice "Successfully logged in"
+logger -t $(basename $0) -p user.notice "Try registering new IP for FQDN $HOSTNAMERECORD.$DOMAIN_NAME ($QUERIED_ADDRESS - $(determine_record_type $IPVERSION))"
+
+update=$(update_dns_record)
+
+if [ "$update" == "$QUERIED_ADDRESS" ]; then
+  logger -t $(basename $0) -p user.notice "Finished updating domain $DOMAIN_NAME"
+else
+  logger -t $(basename $0) -p user.err "Could not update $HOSTNAMERECORD.$DOMAIN_NAME ($QUERIED_ADDRESS - $(determine_record_type $IPVERSION))"
+fi