bind2ips.sh

#!/bin/bash
# Check IP addres and convert to in-addr.arpa address
# Write the commands to a file. Then execute ./dns-import.log to run migration
FILE=$1
TMP="$(mktemp)"
LOG="$(pwd)/dns-import.log"
DOMAIN="domain.tld"

function validate_ip()
{
    local ipaddr=$1
    local code=1

    if [[ $ipaddr =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
        OIFS=$IFS
        IFS='.'
        ipaddr=($ipaddr)
        IFS=$OIFS
        [[ ${ipaddr[0]} -le 255 && ${ipaddr[1]} -le 255 && ${ipaddr[2]} -le 255 && ${ipaddr[3]} -le 255 ]]
        code=$?
    fi
    return $code
}

function createPTR()
{
   local IPADDR=$1
   local FQDN=$2
   RN=$(echo $IPADDR | awk -F. '{print $4}')
   RZ=$(echo $IPADDR | awk -F. '{print $3"."$2"."$1".in-addr.arpa."}')
   echo "/usr/bin/ipa dnsrecord-add ${RZ} ${RN} --ptr-rec ${FQDN}" >> ${LOG}
}

function processZoneFile()
{
# Simple check to see BIND zone header in the file
# Remove it
   if [[ $(head -1 $FILE) =~ *ORIGIN$ ]]; then
        echo "Likely a bad formatted file. Remove BIND zone header"
        exit 1
   else
        # Remove ORIGIN, TTL, Comments (;) lines out put to temp file
        sed -n '/$ORIGIN/!p' ${FILE} | \
        sed -n '/$TTL/!p' | \
        sed -n '/;/!p' | awk '{print $1, $2, $3}' > ${TMP}
        while IFS=$' \n\t' read -r HOST TYPE TARGET && [[ -n "$HOST" ]]; do
            if [ $TYPE == 'A' ]; then
                echo "/usr/bin/ipa dnsrecord-add ${DOMAIN} ${HOST} --a-rec ${TARGET}" >> ${LOG}
                FQDN="${HOST}.domain.tld."
                validate_ip ${TARGET}
                if [[ $? -eq 0 ]]; then
                   createPTR ${TARGET} ${FQDN}
                else
                   echo "Error creating PTR record" >> ${LOG}
                fi
            elif [ $TYPE == 'CNAME' ] && [[ "$TARGET" == *.  ]]; then
                echo "/usr/bin/ipa dnsrecord-add ${DOMAIN} ${HOST} --cname-rec=\"${TARGET}\"" >> ${LOG}
            else
                echo "Bad Input: $HOST $TYPE $TARGET" >> ${LOG}
            fi
        done < ${TMP}
   fi
}

if [ -f $1 ]; then
   processZoneFile
else
   echo "Please supply a zone file with BIND zone header removed"
   exit 1
fi