#!/bin/bash

SRC_DIR=/usr/src/m2
KAMAILIO_CONF_DIR=/usr/local/etc/kamailio
KAMAILIO_VERSION="5.4"

# install prerequisites
yum install -y git svn wget vim gcc gcc-devel bison bison-devel flex flex-devel mysql mysql-devel gcc-c++ gdb

# install kamailio
rm -fr /usr/src/kamailio &> /dev/null
git clone https://github.com/kamailio/kamailio.git /usr/src/kamailio
cd /usr/src/kamailio/
git checkout -b $KAMAILIO_VERSION origin/$KAMAILIO_VERSION
make cfg
make all include_modules="db_mysql"
make install include_modules="db_mysql"
killall -9 kamailio &> /dev/null

# make backup of old config (incase script is used to update system)
cp -fr $KAMAILIO_CONF_DIR/kamailio.cfg $KAMAILIO_CONF_DIR/kamailio.cfg.backup.`date '+%Y_%m_%d_%H_%M_%S'` &> /dev/null

# copy new configs
cp -fr $SRC_DIR/kamailio/kamailio.cfg $KAMAILIO_CONF_DIR/

if [ ! -f $KAMAILIO_CONF_DIR/dispatcher.list ]; then
    cp -fr $SRC_DIR/kamailio/dispatcher.list $KAMAILIO_CONF_DIR/
fi

# install init script
cp -fr $SRC_DIR/kamailio/kamailio.init /etc/init.d/kamailio
chmod 777 /etc/init.d/kamailio

# start kamailio on startup
chkconfig kamailio on

# create initial proxy configuration file
if [ ! -f /etc/m2/system.conf ]; then
    mkdir -p /etc/m2 &> /dev/null
    touch /etc/m2/system.conf
    echo "# database connection settings" >> /etc/m2/system.conf
    echo "dbhost = localhost" >> /etc/m2/system.conf
    echo "dbname = m2" >> /etc/m2/system.conf
    echo "dbuser = kamailio" >> /etc/m2/system.conf
    echo "dbsecret = kamailio" >> /etc/m2/system.conf
    echo "dbport = 3306" >> /etc/m2/system.conf
    echo "" >> /etc/m2/system.conf
fi

# create directories
mkdir -p /usr/local/m2 &> /dev/null
mkdir -p /var/log/m2 &> /dev/null

# give permissions
chmod 777 -R /usr/local/m2
chmod 777 -R /var/log/m2

# clean iptables
$SRC_DIR/maintenance/iptables_clean.sh

# install iptables whitelist
$SRC_DIR/helpers/m2_connection_points_whitelist/install.sh

# install m2_server_loadstats
cd $SRC_DIR/scripts
killall -9 m2_server_loadstats &> /dev/null
gcc -g -Wall -o m2_server_loadstats m2_server_loadstats.c -L/usr/lib/mysql -L/usr/lib64/mysql -lmysqlclient -lpthread
cp -fr m2_server_loadstats /usr/local/m2/m2_server_loadstats
cp -fr m2_server_loadstats_service /etc/init.d/m2_server_loadstats
chmod +x /etc/init.d/m2_server_loadstats
chkconfig --add m2_server_loadstats
chkconfig --level 2345 m2_server_loadstats on
service m2_server_loadstats start

# install m2_terminator_check
cd $SRC_DIR/scripts
gcc -g -Wall -o m2_terminator_check m2_terminator_check.c -L/usr/lib/mysql -L/usr/lib64/mysql -lmysqlclient -lpthread
cp -fr m2_terminator_check /usr/local/m2/m2_terminator_check
cp -fr $SRC_DIR/scripts/cronjobs/m2_terminator_check /etc/cron.d/

service crond restart

# configure kamailio log
mkdir -p /var/log/kamailio
if ! grep -F "kamailio" /etc/rsyslog.conf &> /dev/null; then
    echo "# Kamailio log" >> /etc/rsyslog.conf
    echo "local0.*                                                -/var/log/kamailio/kamailio.log" >> /etc/rsyslog.conf
    echo "" >> /etc/rsyslog.conf
    service rsyslog restart
fi

$SRC_DIR/kamailio/maintenance/disable_system_logging.sh

# install logrotate
cp -fr $SRC_DIR/kamailio/kamailio_logrotate /etc/logrotate.d/kamailio

# set timezone to UTC
$SRC_DIR/maintenance/set_server_timezone_to_utc.sh 

# proper place for configuration files
ln -sf /usr/local/etc/kamailio /etc/kamailio

echo "Kamailio installation finished"