IPTABLES_SERVICE_NAME_4="iptables"
IPTABLES_SERVICE_NAME_6="ip6tables"

IPTABLES_BIN_PATH="/sbin"

rule_template() {
	echo "INPUT -p udp --sport 161 --dport $1 -j ACCEPT"
}

add_rules_iptables() {
# $1 - iptables(ip6tables)
# $2 - port
	"${IPTABLES_BIN_PATH}/$1" "-I" `rule_template $2`
}

delete_rules_iptables() {
# $1 - iptables(ip6tables)
# $2 - port
	"${IPTABLES_BIN_PATH}/$1" "-D" `rule_template $2`
}

save_rules_iptables() {
	service "$1"-save > "$2"
}

change_rules_fedora() {
	local ACTION=$1		# delete or add
	local NAME=$2		# iptables(iptables6) restart service
	local PORT=$3

	# add or delete new rules to ip(6)tables
	# first, delete old rules
	# in order to avoid repeated rules
	delete_rules_iptables "$NAME" "$PORT"
	if [ "$ACTION" = "add" ] ; then
		add_rules_iptables "$NAME" "$PORT"
	fi

	# save all rules to configfile
	service "$NAME" save
}

plug_hifw_fedora() {
	log_message "delete_rules_throught_Fedora_RH"

	change_rules_fedora "delete" "$IPTABLES_SERVICE_NAME_4" "$1"
	change_rules_fedora "delete" "$IPTABLES_SERVICE_NAME_6" "$1"
}

make_hifw_fedora() {
# mhifw - make hole in firewall for Fedora and RH distr
# add rules to iptables, then save new rules in /etc/systocfig/ip(6)tables
	change_rules_fedora "add" "$IPTABLES_SERVICE_NAME_4" "$1"
	local RESULT="$?"
	change_rules_fedora "add" "$IPTABLES_SERVICE_NAME_6" "$1"

	return $RESULT
}