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#!/bin/bash -e
#
# sync-router shell scripts to synchronize cisco configuration and DHCP static
# lease files with with GIT repository. Operations performed:
# - update header of modified DHCP static lease files, upload
# them using using scp and add them to the next commit
# - restart Cisco DHCP service after updating static lease files
# - copy Cisco startup-config using scp and add to next commit
# - commit changes to the git repository
#
# Version 1.0, latest version at: https://gitlab.lindenaar.net/scripts/cisco
#
# Copyright (c) 2016 Frederik Lindenaar
#
# This script is free software: you can redistribute and/or modify it under the
# terms of version 3 of the GNU General Public License as published by the Free
# Software Foundation, or (at your option) any later version of the license.
#
# This script is distributed in the hope that it will be useful but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with
# this program. If not, visit <http://www.gnu.org/licenses/> to download it.
### Configuration ###
router=`basename \`dirname $0 | pwd\`` # name of router - based on directory
syncfiles=dhcp-\* # list/pattern of dhcp lease files
fileto=flash: # location of dhcp lease files on cisco
### Implementation ###
echo updating with $router
# Process the DHCP static lease files that have changed
git status -s "$syncfiles" | while read status filename
do
case $status in
\?\?)
echo skipping $filename as it is not yet added to the repository
;;
D)
echo removing $filename as it is no longer in the repository
ssh -q $router "delete /force $fileto$filename"
;;
A |M)
echo updating and uploading modified file $filename
head -2 $filename | while read tag value
do
case $tag in
\*time\*)
date +"$tag %h %d %Y %l:%M %p" > .$filename.$$.tmp
;;
\*version\*)
echo $tag $[ $value + 1 ] >> .$filename.$$.tmp
;;
*)
echo "found unknown entry \"$tag $value\", aborting"
exit 1
;;
esac
done
tail +3 $filename >> .$filename.$$.tmp
scp -q .$filename.$$.tmp $router:$fileto$filename
mv .$filename.$$.tmp $filename
git add $filename
;;
*)
echo unsupported git status "$status", aborting
exit 1
;;
esac
done
# Restart the DHCP service on the router if any of the dhcp files changed
if git status -s "$syncfiles" | egrep -q ^[MAD]; then
echo restarting dhcp service
cat << EOT | ssh -q $router
configure terminal
no service dhcp
service dhcp
exit
exit
EOT
fi
# Fetch the current start-up configuration and add it to the repository
scp -q $router:startup-config .
git diff startup-config
git add startup-config
# and commit the changes (or unadd new configuration when commit is aborted)
git commit || git reset HEAD startup-config
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