#!/bin/sh
#
#

# PROVIDE: ipfw
# REQUIRE: ppp
# KEYWORD: nojailvnet

. /etc/rc.subr
. /etc/network.subr

name="ipfw"
desc="Firewall, traffic shaper, packet scheduler, in-kernel NAT"
rcvar="firewall_enable"
start_cmd="ipfw_start"
start_precmd="ipfw_prestart"
start_postcmd="ipfw_poststart"
stop_cmd="ipfw_stop"
status_cmd="ipfw_status"
required_modules="ipfw"
extra_commands="status"

set_rcvar_obsolete ipv6_firewall_enable

ipfw_prestart()
{
	if checkyesno dummynet_enable; then
		required_modules="$required_modules dummynet"
	fi
	if checkyesno natd_enable; then
		required_modules="$required_modules ipdivert"
	fi
	if checkyesno firewall_nat_enable; then
		required_modules="$required_modules ipfw_nat"
	fi
	if checkyesno firewall_nat64_enable; then
		required_modules="$required_modules ipfw_nat64"
	fi
	if checkyesno firewall_nptv6_enable; then
		required_modules="$required_modules ipfw_nptv6"
	fi
	if checkyesno firewall_pmod_enable; then
		required_modules="$required_modules ipfw_pmod"
	fi
}

ipfw_start()
{
	local   _firewall_type _module _sysctl_reload

	if [ -n "${1}" ]; then
		_firewall_type=$1
	else
		_firewall_type=${firewall_type}
	fi

	_sysctl_reload=no
	for _module in ${required_modules}
	do
		if kldstat -qn ${_module}; then
			_sysctl_reload=yes
			break
		fi
	done

	if [ ${_sysctl_reload} = yes ]; then
		/etc/rc.d/sysctl reload
	fi

	# set the firewall rules script if none was specified
	[ -z "${firewall_script}" ] && firewall_script=/etc/rc.firewall

	if [ -r "${firewall_script}" ]; then
		/bin/sh "${firewall_script}" "${_firewall_type}"
		echo 'Firewall rules loaded.'
	elif [ "`ipfw list 65535`" = "65535 deny ip from any to any" ]; then
		echo 'Warning: kernel has firewall functionality, but' \
		    'firewall rules are not enabled.'
		echo '           All ip services are disabled.'
	fi

	# Firewall logging
	#
	if checkyesno firewall_logging; then
		echo 'Firewall logging enabled.'
		${SYSCTL} net.inet.ip.fw.verbose=1 >/dev/null
	fi
	if checkyesno firewall_logif; then
		if ! ifconfig ipfw0 >/dev/null 2>&1; then
			ifconfig ipfw0 create
			echo 'Firewall logging pseudo-interface (ipfw0)' \
			    'created.'
		else
			echo 'Firewall logging pseudo-interface (ipfw0)' \
			    'already created.'
		fi
	fi
}

ipfw_poststart()
{
	local	_coscript

	# Start firewall coscripts
	#
	for _coscript in ${firewall_coscripts} ; do
		if [ -f "${_coscript}" ]; then
			${_coscript} quietstart
		fi
	done

	# Enable the firewall
	#
	if ! ${SYSCTL} net.inet.ip.fw.enable=1 >/dev/null 2>&1; then
		warn "failed to enable IPv4 firewall"
	fi
	if afexists inet6; then
		if ! ${SYSCTL} net.inet6.ip6.fw.enable=1 >/dev/null 2>&1
		then
			warn "failed to enable IPv6 firewall"
		fi
	fi
}

ipfw_stop()
{
	local	_coscript

	# Disable the firewall
	#
	${SYSCTL} net.inet.ip.fw.enable=0 >/dev/null
	if afexists inet6; then
		${SYSCTL} net.inet6.ip6.fw.enable=0 >/dev/null
	fi

	# Stop firewall coscripts
	#
	for _coscript in `reverse_list ${firewall_coscripts}` ; do
		if [ -f "${_coscript}" ]; then
			${_coscript} quietstop
		fi
	done
}

ipfw_status()
{
	status=$(sysctl -i -n net.inet.ip.fw.enable)
	: ${status:=0}
	if afexists inet6; then
		status6=$(sysctl -i -n net.inet6.ip6.fw.enable)
		: ${status6:=0}
		status=$((${status} + ${status6}))
	fi
	if [ ${status} -eq 0 ]; then
		echo "ipfw is not enabled"
		exit 1
	else
		echo "ipfw is enabled"
		exit 0
	fi
}

load_rc_config $name
firewall_coscripts="/etc/rc.d/natd ${firewall_coscripts}"

run_rc_command $*
