diff options
| -rwxr-xr-x | usr/share/ddtools/updatezone.sh | 103 | ||||
| -rw-r--r-- | usr/share/doc/ddtools/README.txt | 6 |
2 files changed, 88 insertions, 21 deletions
diff --git a/usr/share/ddtools/updatezone.sh b/usr/share/ddtools/updatezone.sh index 87a7bb9..6dc17bd 100755 --- a/usr/share/ddtools/updatezone.sh +++ b/usr/share/ddtools/updatezone.sh @@ -7,6 +7,7 @@ # Purpose: Provides a single command to update dns zones # Package: updatezone # History: +# 2017-10-15 Added --flush option # Usage: # Primarily intended for updating forward and reverse zones for bind9. # Reference: ftemplate.sh 2017-05-24a; framework.sh 2017-05-24a @@ -16,17 +17,19 @@ # ssh with password-less authentication to slave servers # each zone file has only a single zone fiversion="2017-05-24a" -updatezoneversion="2017-05-29a" +updatezoneversion="2017-10-15b" usage() { less -F >&2 <<ENDUSAGE -usage: updatezone.sh [-duV] [ -c conffile | zone1 zone2 ... ] +usage: updatezone.sh [-duV] [ --flush ] [ -c conffile | zone1 zone2 ... ] version ${updatezoneversion} -d debug Show debugging info, including parsed variables. -u usage Show this usage block. -V version Show script version number. + --flush Wipe all the dhcpd-defined entries. -c conffile Choose which conffile. Required if you do not name specific zones zone1 Dns zone defined as UZ_ZONE_NAME in any .conf file in ${default_dir}/ +If the flush action is not requested, the normal action is edit, so you will interactively edit the zonefiles. Return values: 0 Normal 1 Help or version info displayed @@ -42,7 +45,7 @@ ENDUSAGE # DEFINE FUNCTIONS check_zone_file() { - # call: check_zone_file forward "${zone_name}" "${forward_file}" "{temp_forward_file}" + # call: check_zone_file forward "${zone_name}" "${forward_file}" "{tmp_forward_file}" debuglev 9 && ferror "check_zone_file $@" local zone_type="$1" local zone_name="$2" @@ -94,7 +97,7 @@ zone_action() { } update_real_zone_if_updated() { - # call: update_real_zone_if_updated "${UZ_REVERSE_ZONE}" "${UZ_REVERSE_FILE}" "${temp_rev_file}" + # call: update_real_zone_if_updated "${UZ_REVERSE_ZONE}" "${UZ_REVERSE_FILE}" "${tmp_rev_file}" debuglev 9 && ferror "update_real_zone_if_updated $@" local zone_name="$1" local zone_real_file="$2" @@ -153,6 +156,7 @@ parseFlag() { "V" | "fcheck" | "version" ) ferror "${scriptfile} version ${updatezoneversion}"; exit 1;; #"i" | "infile" | "inputfile" ) getval;infile1=${tempval};; "c" | "conf" | "config" | "conffile" ) getval;conffile=${tempval};; + "flush" ) action=flush;; esac debuglev 10 && { test ${hasval} -eq 1 && ferror "flag: ${flag} = ${tempval}" || ferror "flag: ${flag}"; } @@ -270,21 +274,24 @@ then exit 4 fi -# MAIN LOOP -main() { - # call: main "${conffile}" - get_conf "$1" +# MAIN ACTIONS + +# EDIT +main_action() { + # call: main_action "${action}" "${conffile}" + local action="${1}" + get_conf "${2}" # DEBUG SIMPLECONF debuglev 5 && { ferror "Using values" # used values: EX_(OPT1|OPT2|VERBOSE) set | grep -iE "^UZ_" 1>&2 } - local temp_for_file="$( mktemp -p "${tempdir}" forward.XXXX 2>/dev/null )" - local temp_rev_file="$( mktemp -p "${tempdir}" reverse.XXXX 2>/dev/null )" + local tmp_for_file="$( mktemp -p "${tempdir}" forward.XXXX 2>/dev/null )" + local tmp_rev_file="$( mktemp -p "${tempdir}" reverse.XXXX 2>/dev/null )" local zones_to_thaw_file="$( mktemp -p "${tempdir}" thaw.XXXX )" local zones_to_update_file="$( mktemp -p "${tempdir}" update.XXXX )" - for word in "${temp_for_file}" "${temp_rev_file}"; + for word in "${tmp_for_file}" "${tmp_rev_file}"; do if test ! -f "${word}"; then @@ -293,23 +300,64 @@ main() { fi done + # Freezing the zone ensures all records are in the primary files which we check. local pause_to_show_error=0 # Check forward zone file and freeze - check_zone_file forward "${UZ_FORWARD_ZONE}" "${UZ_FORWARD_FILE}" "${temp_for_file}" + check_zone_file forward "${UZ_FORWARD_ZONE}" "${UZ_FORWARD_FILE}" "${tmp_for_file}" # Check reverse zone file and freeze - check_zone_file reverse "${UZ_REVERSE_ZONE}" "${UZ_REVERSE_FILE}" "${temp_rev_file}" + check_zone_file reverse "${UZ_REVERSE_ZONE}" "${UZ_REVERSE_FILE}" "${tmp_rev_file}" # Slow down to show errors if any fistruthy "${pause_to_show_error}" && sleep 1.3 - # Allow user to edit files that exist - local these_temp_files="$( find "${temp_for_file}" "${temp_rev_file}" 2>/dev/null | xargs )" - test -n "${these_temp_files}" && $EDITOR ${these_temp_files} + case "${action}" in + + edit) + # EDIT FILES INTERACTIVELY + local these_temp_files="$( find "${tmp_for_file}" "${tmp_rev_file}" 2>/dev/null | xargs )" + test -n "${these_temp_files}" && $EDITOR ${these_temp_files} + ;; + + flush) + # FLUSH FILES AUTOMATICALLY + + # CALCULATE WHICH RECORDS TO FLUSH + # get dhcpd ttl. + #set -x + local tmp_flush_master_file="$( mktemp -p "${tempdir}" flush.master.XXXX 2>/dev/null )" + local tmp_flush_for_file="$( mktemp -p "${tempdir}" flush.for.XXXX 2>/dev/null )" + local tmp_flush_rev_file="$( mktemp -p "${tempdir}" flush.rev.XXXX 2>/dev/null )" + + local dhcpd_ttl="$( grep -hE "default-lease-time" $( { $( which dhcpd-control ) --debug 5 nop; } 2>&1 | grep -E "_FILE=" | grep -vE "LEASES_" | cut -d'=' -f2 | xargs ) | cut -d' ' -f2 | tr -d ';' )" + # this next statement only returns an integer, but the rounding should be the same as the dns ttl rounding + local dns_ttl="$( printf "${dhcpd_ttl}/2\n" | bc )" + + debuglev 2 && ferror "Flushing entries that have ttl ${dns_ttl} and have a TXT hash" + # fetch all dns A and TXT records that have the requested TTL + awk '$1 == "$TTL" {a=$2;} $1 != "$TTL" {if(a=='${dns_ttl}' && ($1=="TXT" || $2=="A")) print;}' "${tmp_for_file}" | \ + # restrict to the A records that have associated TXT records + awk 'NR>1{if ($1=="TXT") print prev,$0;} {prev=$0;}' | \ + # only keep ones whose TXT hash is the correct length + awk '$4=="TXT" && $5 ~ /"[a-fA-F0-9]{34}"/ {print;}' > "${tmp_flush_master_file}" + + # prepare items to flush, forward + # convert to each a single line in a file, for future grep -v + grep -oE "(([0-9]{1,3}\.){3}[0-9]{1,3}|"[a-fA-F0-9]{34}")" "${tmp_flush_master_file}" > "${tmp_flush_for_file}" + # prepare items to flush, reverse + awk '{print $1}' "${tmp_flush_master_file}" | sed -e 's/^/PTR\\s\*/;' > "${tmp_flush_rev_file}" + + # flush forward records + grep -v -f "${tmp_flush_for_file}" "${tmp_for_file}" > "${tmp_for_file}2"; mv -f "${tmp_for_file}2" "${tmp_for_file}" + # flush reverse records + grep -v -E -f "${tmp_flush_rev_file}" "${tmp_rev_file}" > "{tmp_rev_file}2"; mv -f "${tmp_rev_file}2" "${tmp_rev_file}" + ;; + + esac # Update the real zone if the temp file was updated - update_real_zone_if_updated "${UZ_FORWARD_ZONE}" "${UZ_FORWARD_FILE}" "${temp_for_file}" - update_real_zone_if_updated "${UZ_REVERSE_ZONE}" "${UZ_REVERSE_FILE}" "${temp_rev_file}" + update_real_zone_if_updated "${UZ_FORWARD_ZONE}" "${UZ_FORWARD_FILE}" "${tmp_for_file}" + update_real_zone_if_updated "${UZ_REVERSE_ZONE}" "${UZ_REVERSE_FILE}" "${tmp_rev_file}" # Thaw zones that need it while read thiszone; do @@ -341,10 +389,23 @@ main() { } #| tee -a ${logfile} +####################################################### + +# DETERMINE ACTION +case "${action}" in + "flush") + debuglev 2 && ferror "Action is flush." + ;; + *) + debuglev 2 && ferror "Action is edit." + action=edit + ;; +esac +# MAIN LOOP if test -n "${conffile}"; then - ( main "${conffile}"; ) + ( main_action "${action}" "${conffile}"; ) else # assume the $opt items are the zone names y=0 @@ -352,11 +413,11 @@ else do y=$(( y + 1 )) eval "thiszonename=\${opt${y}}" - debuglev 1 && ferror "Will try to update zone ${thiszonename}" + debuglev 1 && ferror "Will try to ${action} zone ${thiszonename}" file_for_this_zone="$( grep -liE "UZ_ZONE_NAME=${thiszonename}" "${default_dir}/"*.conf 2>/dev/null )" if test -n "${file_for_this_zone}" && test -f "${file_for_this_zone}"; then - ( main "${file_for_this_zone}"; ) + ( main_action "${action}" "${file_for_this_zone}"; ) else ferror "Skipping zone ${thiszonename} for which no file was found in ${default_dir}/" fi diff --git a/usr/share/doc/ddtools/README.txt b/usr/share/doc/ddtools/README.txt index ae6ac85..a767968 100644 --- a/usr/share/doc/ddtools/README.txt +++ b/usr/share/doc/ddtools/README.txt @@ -39,6 +39,11 @@ This tool will only request updates for zones that are updated. Also, you do not You can also specify multiple zones on the command line. $ updatezone ipa.smith122.com ad.smith122.com +You can also use the --flush flag to clear out the A and PTR records whose TTL matches the dhcp server TTL. It ties in nicely with the dhcpd-control --flush command. Remember that you need to give a zone name (or -c conffile) option as well. + +Example: +updatezone --flush ipa.smith122.com + ### NOTES ### REFERENCE @@ -50,3 +55,4 @@ $ updatezone ipa.smith122.com ad.smith122.com 2017-10-14 B Stack <bgstack15@gmail.com> 0.0-3 - Rearranged directory structure to match current standards - Added bash autocompletion definition for updatezone +- Added --flush to updatezone to match dhcpd-control |