From 8f27989ba7524851b53140258390bb896674c9c4 Mon Sep 17 00:00:00 2001 From: "B. Stack" Date: Mon, 19 Aug 2024 12:30:40 -0400 Subject: update the utilites for current paths, rearrange whole package for 0.0.4-1 --- src/usr/bin/dhcpd-control | 478 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 478 insertions(+) create mode 100755 src/usr/bin/dhcpd-control (limited to 'src/usr/bin/dhcpd-control') diff --git a/src/usr/bin/dhcpd-control b/src/usr/bin/dhcpd-control new file mode 100755 index 0000000..7ee4e0a --- /dev/null +++ b/src/usr/bin/dhcpd-control @@ -0,0 +1,478 @@ +#!/bin/sh +# Filename: dhcpd-control.sh +# Location: +# Author: bgstack15@gmail.com +# Startdate: 2017-05-28 18:18:46 +# Title: Script that Facilitates the Configuration of DHCPD Across a Server Pair +# Purpose: Provides a single command for would take a series of steps +# Package: ddtools +# History: +# 2024-08-19 fix framework path +# Usage: +# Reference: ftemplate.sh 2017-05-24a; framework.sh 2017-05-24a +# order of dhcpd servers to restart https://kb.isc.org/article/AA-01043/0/Recommendations-for-restarting-a-DHCP-failover-pair.html +# merge lines with sed http://www.linuxquestions.org/questions/programming-9/merge-lines-in-a-file-using-sed-191121/ +# Improve: +# provide mechanisms for non-systemd service control +# provide ways to specify what to see in the --list output +# list leases on both servers +# Dependencies: +# systemd +fiversion="2017-05-24a" +dhcpdcontrolversion="2024-08-19a" + +usage() { + less -F >&2 < | --list ] [ --force ] +version ${dhcpdcontrolversion} + -d debug Show debugging info, including parsed variables. + -u usage Show this usage block. + -V version Show script version number. + --flush Clears all current leases + --edit Edit the combined file-- the one shared by both servers. + --edit-local Edit the local file. + --edit-other Edit the other server dhcpd file. + --remove-mac Clears the leases for this MAC address. + --list List current leases. +Return values: +0 Normal +1 Help or version info displayed +2 Count or type of flaglessvals is incorrect +3 Incorrect OS type +4 Unable to find dependency +5 Not run as root or sudo +ENDUSAGE +} + +# DEFINE FUNCTIONS + +# DEFINE TRAPS + +clean_dhcpdcontrol() { + { + rm -f ${tmp_dhcpd_combined_file} ${tmp_dhcpd_local_file} ${tmp_dhcpd_other_file} ${tmp_mac_local_file} ${tmp_macless_local_file} ${tmp_leases_other_file} ${tmp_mac_other_file} ${tmp_macless_other_file} + } 1>/dev/null 2>&1 + #use at end of entire script if you need to clean up tmpfiles +} + +CTRLC() { + #trap "CTRLC" 2 + clean_dhcpdcontrol + #useful for controlling the ctrl+c keystroke +} + +CTRLZ() { + #trap "CTRLZ" 18 + [ ] #useful for controlling the ctrl+z keystroke +} + +parseFlag() { + flag="$1" + hasval=0 + case ${flag} in + # INSERT FLAGS HERE + "d" | "debug" | "DEBUG" | "dd" ) setdebug; ferror "debug level ${debug}";; + "u" | "usage" | "help" | "h" ) usage; exit 1;; + "V" | "fcheck" | "version" ) ferror "${scriptfile} version ${dhcpdcontrolversion}"; exit 1;; + #"i" | "infile" | "inputfile" ) getval;infile1=${tempval};; + "f" | "force" ) DHCPD_CONTROL_FORCE=1;; + "flush" ) action="flush";; + "edit-local" ) action="edit-local";; + "edit-other" ) action="edit-other";; + "edit" ) action="edit";; + "remove-mac" ) getval; DHCPD_CONTROL_MAC_TO_REMOVE="${tempval}"; action="remove-mac";; + "list" ) action="list";; + esac + + debuglev 10 && { test ${hasval} -eq 1 && ferror "flag: ${flag} = ${tempval}" || ferror "flag: ${flag}"; } +} + +# DETERMINE LOCATION OF FRAMEWORK +while read flocation; do if test -x ${flocation} && test "$( ${flocation} --fcheck )" -ge 20170524; then frameworkscript="${flocation}"; break; fi; done <&2 && exit 4 + +# INITIALIZE VARIABLES +# variables set in framework: +# today server thistty scriptdir scriptfile scripttrim +# is_cronjob stdin_piped stdout_piped stderr_piped sendsh sendopts +. ${frameworkscript} || echo "$0: framework did not run properly. Continuing..." 1>&2 +infile1= +outfile1= +logfile=${scriptdir}/${scripttrim}.${today}.out +action="" +define_if_new interestedparties "bgstack15@gmail.com" +# SIMPLECONF +#define_if_new default_conffile "/etc/sysconfig/dhcpd-control" +define_if_new default_conffile "/etc/sysconfig/dhcpd-control" +#define_if_new defuser_conffile ~/.config/dhcpdcontrol/dhcpdcontrol.conf +define_if_new EDITOR vi + +# REACT TO OPERATING SYSTEM TYPE +case $( uname -s ) in + Linux) [ ];; + FreeBSD) [ ];; + *) echo "${scriptfile}: 3. Indeterminate OS: $( uname -s )" 1>&2 && exit 3;; +esac + +## REACT TO ROOT STATUS +#case ${is_root} in +# 1) # proper root +# [ ] ;; +# sudo) # sudo to root +# [ ] ;; +# "") # not root at all +# #ferror "${scriptfile}: 5. Please run as root or sudo. Aborted." +# #exit 5 +# [ ] +# ;; +#esac + +# SET CUSTOM SCRIPT AND VALUES +#setval 1 sendsh sendopts<&2 + } + + update_conf_local=0 + update_leases_local=0 + restart_service_local=0 + update_conf_other=0 + update_leases_other=0 + restart_service_other=0 + debuglev 8 && ferror "BEGIN action ${action}" + case "${action}" in + + "flush") + debuglev 8 && ferror "BEGIN flush" + # Clear temorary leases file + debuglev 4 && ferror "Flushing all leases" + if test -z "${DHCPD_CONTROL_LEASES_TEMP_FILE}"; + then + ferror "Skipping leases temp file. Variable not defined: DHCPD_CONTROL_LEASES_TEMP_FILE." + else + if test -f "${DHCPD_CONTROL_LEASES_TEMP_FILE}"; + then + case "${DHCPD_CONTROL_LEASES_TEMP_FILE}" in + /var/lib/dhcp*) + systemctl stop "${DHCPD_CONTROL_SERVICE}" + rm -f "${DHCPD_CONTROL_LEASES_TEMP_FILE}" + update_leases_other=1; + restart_service_other=1; + restart_service_local=1; + ;; + *) + ferror "Will not delete unsafe leases temp file ${DHCPD_CONTROL_LEASES_TEMP_FILE}." + ;; + esac + fi + fi + # Clear leases file + if test -z "${DHCPD_CONTROL_LEASES_FILE}"; + then + ferror "Skipping leases file. Variable not defined: DHCPD_CONTROL_LEASES_FILE." + else + if test -f "${DHCPD_CONTROL_LEASES_FILE}"; + then + case "${DHCPD_CONTROL_LEASES_FILE}" in + /var/lib/dhcp*) + systemctl stop "${DHCPD_CONTROL_SERVICE}" + printf "" > "${DHCPD_CONTROL_LEASES_FILE}" + update_leases_other=1; + restart_service_other=1; + restart_service_local=1; + ;; + *) + ferror "Will not clear unsafe leases file ${DHCPD_CONTROL_LEASES_FILE}." + ;; + esac + fi + fi + ;; + + "edit") + debuglev 8 && ferror "BEGIN edit" + # prepare temp file + tmp_dhcpd_combined_file="$( mktemp -p /tmp dhcpd.combined.XXXXX )" + cp -p "${DHCPD_CONTROL_COMBINED_FILE}" "${tmp_dhcpd_combined_file}" + # edit file + $EDITOR "${tmp_dhcpd_combined_file}" + # if change occurred, prepare to replace + if ! cmp -s "${DHCPD_CONTROL_COMBINED_FILE}" "${tmp_dhcpd_combined_file}"; + then + debuglev 1 && ferror "Updating dhcpd combined file." + bup "${DHCPD_CONTROL_COMBINED_FILE}" + cp -p "${tmp_dhcpd_combined_file}" "${DHCPD_CONTROL_COMBINED_FILE}" + update_conf_other=1 + restart_service_local=1 + restart_service_other=1 + fi + ;; + + "edit-local") + debuglev 8 && ferror "BEGIN edit-local" + # prepare temp file + tmp_dhcpd_local_file="$( mktemp -p /tmp dhcpd.XXXXX )" + cp -p "${DHCPD_CONTROL_DHCPD_FILE}" "${tmp_dhcpd_local_file}" + $EDITOR "${tmp_dhcpd_local_file}" + # if change occurred, prepare to replace + if ! cmp -s "${DHCPD_CONTROL_DHCPD_FILE}" "${tmp_dhcpd_local_file}"; + then + debuglev 1 && ferror "Updating local dhcpd file." + bup "${DHCPD_CONTROL_DHCPD_FILE}" + cp -p "${tmp_dhcpd_local_file}" "${DHCPD_CONTROL_DHCPD_FILE}" + restart_service_local=1 + fi + ;; + + "edit-other") + debuglev 8 && ferror "BEGIN edit-other" + tmp_dhcpd_other_file="$( mktemp -p /tmp dhcpd.other.XXXXX )" + scp -p "${DHCPD_CONTROL_OTHER_SERVER}:${DHCPD_CONTROL_DHCPD_FILE}" "${tmp_dhcpd_other_file}" + cp -p "${tmp_dhcpd_other_file}" "${tmp_dhcpd_other_file}8" #arbitrary number # edit file + ${EDITOR} "${tmp_dhcpd_other_file}8" + if ! cmp -s "${tmp_dhcpd_other_file}" "${tmp_dhcpd_other_file}8"; + then + debuglev 1 && ferror "Updating other server dhcpd file." + ssh "${DHCPD_CONTROL_OTHER_SERVER}" bup "${DHCPD_CONTROL_DHCPD_FILE}"; + scp -p "${tmp_dhcpd_other_file}8" "${DHCPD_CONTROL_OTHER_SERVER}:${DHCPD_CONTROL_DHCPD_FILE}"; + restart_service_other=1 + fi + ;; + + "remove-mac") + debuglev 8 && ferror "BEGIN remove-mac" + # working on this + # sed -n -r -e '/^lease.*\{/,/^\}/{/^lease|hardware|\}/{p}}' /tmp/foo1 | sed -e ':a;/\}/!{N;s/\n/ /;ba};' # base form + # sed -n -r -e '/^lease.*\{/,/^\}/{p}' /tmp/foo1 | sed -e ':a;/\}/!{N;s/\n/ /;ba};' -e 's/\s\+/ /g;' # slightly trimmed + # sed -n -r -e '/\{/,/^\}/{p}' /tmp/foo1 | sed -e ':a;/\}/!{N;s/\n/ /;ba};' -e 's/\s\+/ /g;' | grep -iE "ec:9a:74:48:bc:c4" # find the one mac address + + # prepare temp files + tmp_mac_local_file="$( mktemp -p /tmp leases.mac.XXXXX )" + tmp_macless_local_file="$( mktemp -p /tmp leases.macless.XXXXX )" + tmp_leases_other_file="$( mktemp -p /tmp leases.other.XXXXX )" + tmp_mac_other_file="$( mktemp -p /tmp leases.mac.XXXXX )" + tmp_macless_other_file="$( mktemp -p /tmp leases.macless.XXXXX )" + if test -z "${DHCPD_CONTROL_MAC_TO_REMOVE}"; + then + ferror "${scripttrim}: 2. No MAC address provided. aborted." + exit 2 + fi + + scp -p "${DHCPD_CONTROL_OTHER_SERVER}:${DHCPD_CONTROL_LEASES_FILE}" "${tmp_leases_other_file}" + + # prepare list of local leases to clear + sed -n -r -e '/\{/,/^\}/{p}' "${DHCPD_CONTROL_LEASES_FILE}" | sed -e ':a;/\}/!{N;s/\n/ /;ba};' -e 's/\s\+/ /g;' | grep -iE "${DHCPD_CONTROL_MAC_TO_REMOVE}" > "${tmp_mac_local_file}" + # prepare list of other leases to clear + sed -n -r -e '/\{/,/^\}/{p}' "${tmp_leases_other_file}" | sed -e ':a;/\}/!{N;s/\n/ /;ba};' -e 's/\s\+/ /g;' | grep -iE "${DHCPD_CONTROL_MAC_TO_REMOVE}" > "${tmp_mac_other_file}" + + # remove leases from this dhcpd server + if test -n "$( cat "${tmp_mac_local_file}" )"; + then + ferror "Removing leases from this dhcpd server:" + cat "${tmp_mac_local_file}" 1>&2 + fi + sed -n -r -e '/\{/,/^\}/{p}' "${DHCPD_CONTROL_LEASES_FILE}" | sed -e ':a;/\}/!{N;s/\n/ /;ba};' -e 's/\s\+/ /g;' | grep -viE "${DHCPD_CONTROL_MAC_TO_REMOVE}" > "${tmp_macless_local_file}" + if ! cmp -s "${tmp_macless_local_file}" "${DHCPD_CONTROL_LEASES_FILE}" + then + systemctl stop "${DHCPD_CONTROL_SERVICE}" + cp -p "${tmp_macless_local_file}" "${DHCPD_CONTROL_LEASES_FILE}" + restart_service_local=1 + fi + + # remove leases from other dhcpd server + if test -n "$( cat "${tmp_mac_other_file}" )"; + then + ferror "Removing leases from other dhcpd server:" + cat "${tmp_mac_other_file}" 1>&2 + fi + sed -n -r -e '/\{/,/^\}/{p}' "${tmp_leases_other_file}" | sed -e ':a;/\}/!{N;s/\n/ /;ba};' -e 's/\s\+/ /g;' | grep -viE "${DHCPD_CONTROL_MAC_TO_REMOVE}" > "${tmp_macless_other_file}" + if ! cmp -s "${tmp_macless_other_file}" "${tmp_leases_other_file}"; + then + ssh "${DHCPD_CONTROL_OTHER_SERVER}" systemctl stop "${DHCPD_CONTROL_SERVICE}" + scp -p "${tmp_macless_other_file}" "${DHCPD_CONTROL_LEASES_FILE}" + restart_service_other=1 + fi + ;; + + "list") + debuglev 8 && ferror "BEGIN list" + lease_type="active" + #sed -n -r -e '/\{/,/^\}/{p}' /var/lib/dhcpd/dhcpd.leases | sed -e ':a;/\}/!{N;s/\n/ /;ba};' -e 's/\s\+/ /g;' | grep -iE "active" + #sed -n -r -e '/\{/,/^\}/{p}' /var/lib/dhcpd/dhcpd.leases | grep -iE "\{|\}|client-fqdn|hostname|hardware|starts|ends" | sed -e ':a;/\}/!{N;s/\n/ /;ba};' -e 's/\s\+/ /g;' | awk '!x[$14]++' | sort -k2 + #sed -n -r -e '/\{/,/^\}/{p}' /var/lib/dhcpd/dhcpd.leases | grep -iE "\{|\}|client-fqdn|hostname|hardware|starts|ends" | sed -e ':a;/\}/!{N;s/\n/ /;ba};' -e 's/\s\+/ /g;' -e 's | awk '!x[$14]++' | sort -k2 + #sed -n -r -e '/\{/,/^\}/{p}' /var/lib/dhcpd/dhcpd.leases | grep -iE "\{|\}|client-fqdn|hostname|hardware|starts|ends" | sed -e ':a;/\}/!{N;s/\n/ /;ba};' -e 's/\s\+/ /g;' -e 's/hardware ethernet/mac/;' | awk '!x[$13]++' | sort -k2 + sed -n -r -e '/\{/,/^\}/{p}' "${DHCPD_CONTROL_LEASES_FILE}" | grep -iE "\{|\}|client-fqdn|hostname|hardware|starts|ends" | sed -e ':a;/\}/!{N;s/\n/ /;ba};' -e 's/\s\+/ /g;' -e 's/hardware ethernet/mac/;' | grep -viE "failover peer" | awk '!x[$13]++' | sort -k2 + ;; + *) + ferror "Gotta say unh! Action ${action} ${fallopts} not yet implemented. Aborted." + exit 1 + ;; + esac + + # Prepare instructions for other server + debuglev 8 && ferror "BEGIN prepare instructions for other server" + local_instructions="" + other_instructions="" + instructions="" + fistruthy "${update_leases_other}" && \ + other_instructions="${other_instructions}systemctl stop ${DHCPD_CONTROL_SERVICE}\; rm -f ${DHCPD_CONTROL_LEASES_TEMP_FILE}\; echo \"\" \> ${DHCPD_CONTROL_LEASES_FILE}\; " + fistruthy "${update_conf_other}" && \ + local_instructions="${local_instructions}scp ${DHCPD_CONTROL_COMBINED_FILE} ${DHCPD_CONTROL_OTHER_SERVER}:${DHCPD_CONTROL_COMBINED_FILE}; " + fistruthy "${restart_service_local}" && \ + instructions="${instructions}systemctl restart ${DHCPD_CONTROL_SERVICE}.service" + fistruthy "${restart_service_other}" && \ + other_instructions="${other_instructions}systemctl restart ${DHCPD_CONTROL_SERVICE}" + + # Instruct other server to act + debuglev 8 && ferror "BEGIN instruct other server to act" + if test -n "${DHCPD_CONTROL_OTHER_SERVER}"; + then + debuglev 1 && { + test -n "${local_instructions}" && { + ferror "run local commands:" + ferror "${local_instructions}" + } + test -n "${other_instructions}" && { + ferror "run on other server ${DHCPD_CONTROL_OTHER_SERVER}:" + ferror "ssh ${DHCPD_CONTROL_OTHER_SERVER} ${other_instructions}" + } + } + test -n "${local_instructions}" && ${local_instructions} + test -n "${other_instructions}" && ssh ${DHCPD_CONTROL_OTHER_SERVER} eval ${other_instructions} + fi + + # Local actions regardless of other server + if test -n "${instructions}"; + then + debuglev 1 && { + ferror "run commands:" + ferror "${instructions}" + } + ${instructions} + fi + +#} | tee -a ${logfile} + +# EMAIL LOGFILE +#${sendsh} ${sendopts} "${server} ${scriptfile} out" ${logfile} ${interestedparties} + +## STOP THE READ CONFIG FILE +#exit 0 +#fi; done; } -- cgit