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#!/bin/bash |
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#!/bin/bash |
# author : Petr Simandl www.simandl.cz |
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# author : Petr Simandl www.simandl.cz |
# release date : 07/09/2004 |
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# release date : 26/01/2006 |
# name : sedlo |
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# name : sedlo |
# description : dynamic side routing tables tool |
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# description : dynamic side routing tables tool |
# license : GPL |
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# license : GPL |
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sl_version="0.0.3pre9" |
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sl_version="0.0.4pre1" |
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PATH=$PATH:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin |
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PATH=$PATH:/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin |
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sl_nmcnf="sedlo.conf" |
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sl_nmcnf="sedlo.conf" |
sl_sedlocnf="/etc/$sl_nmcnf" |
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sl_sedlocnf="/etc/$sl_nmcnf" |
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sl_wgetcmd=`which wget` |
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sl_wgetcmd=`which wget` |
sl_hnmcmd=`which hostname` |
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sl_hnmcmd=`which hostname` |
sl_awkcmd=`which awk` |
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sl_awkcmd=`which awk` |
sl_catcmd=`which cat` |
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sl_catcmd=`which cat` |
sl_grepcmd=`which grep` |
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sl_grepcmd=`which grep` |
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sl_diffcmd=`which diff` |
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if [ -e $sl_sedlocnf ] |
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if [ -e $sl_sedlocnf ] |
then |
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then |
sl_nop=1 |
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sl_nop=1 |
else |
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else |
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$sl_ipcmd ro flush cache |
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$sl_ipcmd ro flush cache |
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} # s_flru |
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} # s_flru |
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###################################################################### |
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###################################################################### |
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# here we get each ip and we create a rule to send this ip to a |
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# certain table |
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# this routine can be skipped when the number of ips and ip directions |
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# are still the same = old and new configs are the same |
s_fillrules() |
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s_fillrules() |
{ |
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{ |
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#flush old rules before filling new ones |
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#flush old rules before filling new ones |
#not so nice solution - it is planned to change just what's necessary |
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#not so nice solution - it is planned to change just what's necessary |
#by s_maru |
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#by s_maru |
s_flru |
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s_flru |
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if [ $scm_info -gt 0 ]; then echo "Creating rules" ; fi |
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if [ $scm_info -gt 0 ]; then echo "Creating rules for ips" ; fi |
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sl_ips=`$sl_catcmd $sl_sedlocache/$sl_nmcnf | $sl_grepcmd "^ip" | $sl_awkcmd '{print $2"*"$4"*"$5"*"$6}'` |
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sl_ips=`$sl_catcmd $sl_sedlocache/$sl_nmcnf | $sl_grepcmd "^ip" | $sl_awkcmd '{print $2"*"$4"*"$5"*"$6}'` |
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for sl_ip in $sl_ips |
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for sl_ip in $sl_ips |
do |
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do |
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$sl_ipcmd ro flush cache |
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$sl_ipcmd ro flush cache |
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} # s_fillrules |
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} # s_fillrules |
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###################################################################### |
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###################################################################### |
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# here we look into the main routing table for path to our iGWs |
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# and we fill these tables with two halves default nets that |
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# point to appropriate direction |
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# this routine can be skipped when the routing table is the same |
s_filltables() |
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s_filltables() |
{ |
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{ |
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if [ $scm_info -gt 0 ]; then echo "Checking main routing table" ; fi |
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if [ $scm_info -gt 0 ]; then echo "Filling tables" ; fi |
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if [ $scm_info -gt 0 ]; then echo "Filling tables" ; fi |
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sl_igws=`$sl_catcmd $sl_sedlocache/$sl_nmcnf | $sl_grepcmd -E "^igw|^myigw" | $sl_awkcmd '{print $3"*"$2"*"$1}'` |
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sl_igws=`$sl_catcmd $sl_sedlocache/$sl_nmcnf | $sl_grepcmd -E "^igw|^myigw" | $sl_awkcmd '{print $3"*"$2"*"$1}'` |
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for sl_igw in $sl_igws |
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for sl_igw in $sl_igws |
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else |
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else |
if [ $scm_info -gt 1 ]; then echo "Table filled for igw $sl_igwn" ; fi |
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if [ $scm_info -gt 1 ]; then echo "Table filled for igw $sl_igwn" ; fi |
fi |
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fi |
fi |
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fi |
done |
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done |
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#this should make faster applying of new routing tables |
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$sl_ipcmd ro flush cache |
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} # s_filltables |
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} # s_filltables |
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###################################################################### |
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###################################################################### |
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# filling rttab with tables from config |
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# only new tables are created with a new uniq number that is not important because |
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# usually we handle tables just by their names |
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# this routine acts only when a new iGW appears - only adding a table is supported |
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# no deleting is implemented because it seems to be not necessary to delete an old table |
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# because there is space enough and after reboot table will not be created |
s_mktables() |
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s_mktables() |
{ |
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{ |
if [ $scm_info -gt 0 ]; then echo "Creating tables " ; fi |
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if [ $scm_info -gt 0 ]; then echo "Checking tables" ; fi |
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if [ $scm_info -gt 0 ]; then echo "Creating tables" ; fi |
sl_igws=`$sl_catcmd $sl_sedlocache/$sl_nmcnf | $sl_grepcmd -E "^igw|^myigw" | $sl_awkcmd '{print $3}'` |
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sl_igws=`$sl_catcmd $sl_sedlocache/$sl_nmcnf | $sl_grepcmd -E "^igw|^myigw" | $sl_awkcmd '{print $3}'` |
for sl_igw in $sl_igws |
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for sl_igw in $sl_igws |
do |
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do |
sl_igwrttb=`$sl_catcmd $sl_rttab | $sl_awkcmd '{print $2}' | $sl_grepcmd $sl_igw ` |
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sl_igwrttb=`$sl_catcmd $sl_rttab | $sl_awkcmd '{print $2}' | $sl_grepcmd $sl_igw ` |
if [ "$sl_igwrttb x" = " x" ] |
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if [ "$sl_igwrttb x" = " x" ] |
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{ |
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{ |
if [ $scm_info -gt 0 ]; then echo "Getting config" ; fi |
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if [ $scm_info -gt 0 ]; then echo "Getting config" ; fi |
if [ $scm_info -gt 1 ]; then echo "Using main config $sl_murlcfg" ; fi |
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if [ $scm_info -gt 1 ]; then echo "Using main config $sl_murlcfg" ; fi |
if [ $scm_info -gt 1 ]; then echo "Using local config $sl_sedlocnf" ; fi |
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if [ $scm_info -gt 1 ]; then echo "Using local config $sl_sedlocnf" ; fi |
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wget -q -t 3 $sl_murlcfg -O "$sl_sedlocache/$sl_nmcnf.main.tmp" |
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rm -f "$sl_sedlocache/$sl_nmcnf.main.tmp" |
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$sl_wgetcmd -q -t 3 $sl_murlcfg -O "$sl_sedlocache/$sl_nmcnf.main.tmp" |
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if [ -s $sl_sedlocache/$sl_nmcnf.main.tmp ] |
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if [ -s $sl_sedlocache/$sl_nmcnf.main.tmp ] |
then |
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then |
date > $sl_sedlocache/last_getcnf.txt |
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date > $sl_sedlocache/last_getcnf.txt |
cp $sl_sedlocache/$sl_nmcnf.main.tmp $sl_sedlocache/$sl_nmcnf.main |
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cp $sl_sedlocache/$sl_nmcnf.main.tmp $sl_sedlocache/$sl_nmcnf.main |
if [ $scm_info -gt 1 ]; then echo "Main config accepted" ; fi |
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if [ $scm_info -gt 1 ]; then echo "Main config downloaded and accepted" ; fi |
else |
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else |
if [ $scm_info -gt 1 ]; then echo "Main config not downloaded - cached config will be used" ; fi |
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if [ $scm_info -gt 1 ]; then echo "Main config not downloaded - cached config will be used" ; fi |
echo -n "Main config not downloaded " > $sl_sedlocache/last_getcnf.txt |
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echo -n "Main config not downloaded " > $sl_sedlocache/last_getcnf.txt |
date >> $sl_sedlocache/last_getcnf.txt |
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date >> $sl_sedlocache/last_getcnf.txt |
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fi |
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# before generating a new cached config we store the old one for |
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# comparison with the new one |
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rm -f "$sl_sedlocache/$sl_nmcnf.old" |
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if [ -s $sl_sedlocache/$sl_nmcnf ] |
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then |
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cp $sl_sedlocache/$sl_nmcnf $sl_sedlocache/$sl_nmcnf.old |
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else |
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touch $sl_sedlocache/$sl_nmcnf.old |
fi |
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fi |
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# preparing cached config from local and main |
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# preparing cached config from local and main |
# the local config should be processed as the second to have |
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# the local config should be processed as the second to have |
# higher priority for rules from local config |
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# higher priority for rules from local config |
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echo "# generated file" > $sl_sedlocache/$sl_nmcnf |
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echo "# generated file" > $sl_sedlocache/$sl_nmcnf |
for sl_file in `ls $sl_sedlocache/$sl_nmcnf.main ; ls $sl_sedlocnf` |
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for sl_file in `ls $sl_sedlocache/$sl_nmcnf.main ; ls $sl_sedlocnf` |
do |
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do |
cat $sl_file | grep "^mcnf" | $sl_trcmd ';' '#' | awk '{print $1"\t"$2}' >> $sl_sedlocache/$sl_nmcnf |
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cat $sl_file | grep "^mcnf" | $sl_trcmd ';' '#' | awk '{print $1"\t"$2}' >> $sl_sedlocache/$sl_nmcnf |
cat $sl_file | grep "^igw" | $sl_trcmd ';' '#' | awk '{print $1"\t"$2"\t"$3}' >> $sl_sedlocache/$sl_nmcnf |
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cat $sl_file | grep "^igw" | $sl_trcmd ';' '#' | awk '{print $1"\t"$2"\t"$3}' >> $sl_sedlocache/$sl_nmcnf |
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#local gateways taken from local config |
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#local gateways taken from local config |
cat $sl_sedlocnf | grep "^myigw" | $sl_trcmd ';' '#' | awk '{print $1"\t"$2"\t"$3}' >> $sl_sedlocache/$sl_nmcnf |
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cat $sl_sedlocnf | grep "^myigw" | $sl_trcmd ';' '#' | awk '{print $1"\t"$2"\t"$3}' >> $sl_sedlocache/$sl_nmcnf |
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#cat $sl_sedlocache/$sl_nmcnf | sort | uniq > $sl_sedlocache/$sl_nmcnf.uniq |
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#cat $sl_sedlocache/$sl_nmcnf | sort | uniq > $sl_sedlocache/$sl_nmcnf.uniq |
#mv $sl_sedlocache/$sl_nmcnf.uniq $sl_sedlocache/$sl_nmcnf |
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#mv $sl_sedlocache/$sl_nmcnf.uniq $sl_sedlocache/$sl_nmcnf |
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sl_diffcfg=`diff $sl_sedlocache/$sl_nmcnf $sl_sedlocache/$sl_nmcnf.old | grep -c .` |
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if [ $sl_diffcfg -gt 0 ] |
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then |
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if [ $scm_info -gt 0 ]; then echo "New config is different than the old one" ; fi |
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else |
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if [ $scm_info -gt 0 ]; then echo "New config is the same as the old one" ; fi |
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fi |
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# to detect first start after reboot or rule flushig we compare config with rule number |
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# when we have less rules than ips in config then |
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sl_numru=`ip ru ls | grep -c lookup` |
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sl_numip=`grep -c ^ip $sl_sedlocache/$sl_nmcnf` |
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sl_numru=$(($sl_numru - 3 )) |
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if [ $sl_numip -gt $sl_numru ] |
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then |
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if [ $scm_info -gt 0 ]; then echo "We have less rules ($sl_numru) than new config has ips ($sl_numip)" ; fi |
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sl_diffcfg="1" |
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else |
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if [ $scm_info -gt 0 ]; then echo "We have $sl_numru rules and $sl_numip ips" ; fi |
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fi |
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} |
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} |
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###################################################################### |
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###################################################################### |
s_version() |
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s_version() |
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if [ $scm_nogetcfg -eq 0 ] |
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if [ $scm_nogetcfg -eq 0 ] |
then |
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then |
s_getcfg |
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s_getcfg |
fi |
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fi |
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s_mktables |
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s_mktables |
s_filltables |
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s_filltables |
s_fillrules |
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if [ $sl_diffcfg -gt 0 ] |
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then |
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s_fillrules |
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fi |
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exit 0 |
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exit 0 |
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