#!/bin/bash
# info: add firewall blocking rule
# options: IP CHAIN
#
# The function adds new blocking rule to system firewall


#----------------------------------------------------------#
#                    Variable&Function                     #
#----------------------------------------------------------#

# Importing system variables
source /etc/profile

# Argument definition
ip=$1
chain=$(echo $2|tr '[:lower:]' '[:upper:]')

# Defining absolute path for iptables and modprobe
iptables="/sbin/iptables"

# Includes
source $VESTA/func/main.sh
source $VESTA/conf/vesta.conf


#----------------------------------------------------------#
#                    Verifications                         #
#----------------------------------------------------------#

check_args '2' "$#" 'IP CHAIN'
is_format_valid 'ip' 'chain'
is_system_enabled "$FIREWALL_SYSTEM" 'FIREWALL_SYSTEM'


#----------------------------------------------------------#
#                       Action                             #
#----------------------------------------------------------#

# Checking server ip
if [ -e "$VESTA/data/ips/$ip" ] || [ "$ip" = '127.0.0.1' ]; then
    exit
fi

# Checking ip exclusions
excludes="$VESTA/data/firewall/excludes.conf"
check_excludes=$(grep "^$ip$" $excludes 2>/dev/null)
if  [ ! -z "$check_excludes" ]; then
    exit
fi

# Checking ip in banlist
conf="$VESTA/data/firewall/banlist.conf"
check_ip=$(grep "IP='$ip' CHAIN='$chain'" $conf 2>/dev/null)
if [ ! -z "$check_ip" ]; then
    exit
fi

# Adding chain
$BIN/v-add-firewall-chain $chain

# Generating timestamp
time_n_date=$(date +'%T %F')
time=$(echo "$time_n_date" |cut -f 1 -d \ )
date=$(echo "$time_n_date" |cut -f 2 -d \ )

# Adding ip to banlist
echo "IP='$ip' CHAIN='$chain' TIME='$time' DATE='$date'" >> $conf
$iptables -I fail2ban-$chain 1 -s $ip \
    -j REJECT --reject-with icmp-port-unreachable 2>/dev/null

# Changing permissions
chmod 660 $conf


#----------------------------------------------------------#
#                       Vesta                              #
#----------------------------------------------------------#

# Logging
log_event "$OK" "$ARGUMENTS"

exit
