47 lines
1.2 KiB
Bash
47 lines
1.2 KiB
Bash
#!/bin/bash
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##
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# Perform resursive AXFR queries to fetch all hostnames of a zone
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#
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# @copyright 2021, Steffen Vogel
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# @license http://www.gnu.org/licenses/gpl.txt GNU Public License
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# @author Steffen Vogel <post@steffenvogel.de>
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# @link https://www.steffenvogel.de
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##
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print_hosts() {
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ZONE=$1; shift 1
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OPTS="$@"
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SUBZONES=""
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HOSTS=""
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IFS=$'\n'
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RECORDS=$(dig +nocmd $ZONE axfr +noall +answer ${OPTS})
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for RECORD in ${RECORDS}; do
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NAME=$(echo ${RECORD} | tr -s '\t ' '\t' | cut -f1)
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TYPE=$(echo ${RECORD} | tr -s '\t ' '\t' | cut -f4)
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if [ -z "${NAME}" -o "${NAME}" == *'*'* ]; then
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continue
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fi
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case ${TYPE} in
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NS) SUBZONES="${SUBZONES} ${NAME}" ;;
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A|AAAA|CNAME) HOSTS="${NAME} ${HOSTS}" ;;
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esac
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done
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UNIQUE_SUBZONES=$(echo ${SUBZONES} | tr ' ' '\n' | sort -u)
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for SUBZONE in ${UNIQUE_SUBZONES}; do
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if [ ${SUBZONE} != ${ZONE} ]; then
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HOSTS="$(print_hosts ${SUBZONE}) ${HOSTS}"
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fi
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done
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UNIQUE_HOSTS=$(echo ${HOSTS} | tr ' ' '\n' | sort -u)
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for HOST in ${UNIQUE_HOSTS}; do
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echo ${HOST%.}
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done
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}
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print_hosts $@
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