1#!/bin/sh
2#
3# $FreeBSD: stable/11/etc/rc.d/ipfw 369817 2021-05-17 06:18:41Z git2svn $
4#
5
6# PROVIDE: ipfw
7# REQUIRE: ppp
8# KEYWORD: nojailvnet
9
10. /etc/rc.subr
11. /etc/network.subr
12
13name="ipfw"
14desc="Firewall, traffic shaper, packet scheduler, in-kernel NAT"
15rcvar="firewall_enable"
16start_cmd="ipfw_start"
17start_precmd="ipfw_prestart"
18start_postcmd="ipfw_poststart"
19stop_cmd="ipfw_stop"
20status_cmd="ipfw_status"
21required_modules="ipfw"
22extra_commands="status"
23
24set_rcvar_obsolete ipv6_firewall_enable
25
26ipfw_prestart()
27{
28	if checkyesno dummynet_enable; then
29		required_modules="$required_modules dummynet"
30	fi
31	if checkyesno natd_enable; then
32		required_modules="$required_modules ipdivert"
33	fi
34	if checkyesno firewall_nat_enable; then
35		required_modules="$required_modules ipfw_nat"
36	fi
37	if checkyesno firewall_nat64_enable; then
38		required_modules="$required_modules ipfw_nat64"
39	fi
40	if checkyesno firewall_nptv6_enable; then
41		required_modules="$required_modules ipfw_nptv6"
42	fi
43	if checkyesno firewall_pmod_enable; then
44		required_modules="$required_modules ipfw_pmod"
45	fi
46}
47
48ipfw_start()
49{
50	local   _firewall_type
51
52	if [ -n "${1}" ]; then
53		_firewall_type=$1
54	else
55		_firewall_type=${firewall_type}
56	fi
57
58	# set the firewall rules script if none was specified
59	[ -z "${firewall_script}" ] && firewall_script=/etc/rc.firewall
60
61	if [ -r "${firewall_script}" ]; then
62		/bin/sh "${firewall_script}" "${_firewall_type}"
63		echo 'Firewall rules loaded.'
64	elif [ "`ipfw list 65535`" = "65535 deny ip from any to any" ]; then
65		echo 'Warning: kernel has firewall functionality, but' \
66		    ' firewall rules are not enabled.'
67		echo '           All ip services are disabled.'
68	fi
69
70	# Firewall logging
71	#
72	if checkyesno firewall_logging; then
73		echo 'Firewall logging enabled.'
74		${SYSCTL} net.inet.ip.fw.verbose=1 >/dev/null
75	fi
76	if checkyesno firewall_logif; then
77		if ! ifconfig ipfw0 >/dev/null 2>&1; then
78			ifconfig ipfw0 create
79			echo 'Firewall logging pseudo-interface (ipfw0)' \
80			    'created.'
81		else
82			echo 'Firewall logging pseudo-interface (ipfw0)' \
83			    'already created.'
84		fi
85	fi
86}
87
88ipfw_poststart()
89{
90	local	_coscript
91
92	# Start firewall coscripts
93	#
94	for _coscript in ${firewall_coscripts} ; do
95		if [ -f "${_coscript}" ]; then
96			${_coscript} quietstart
97		fi
98	done
99
100	# Enable the firewall
101	#
102	if ! ${SYSCTL} net.inet.ip.fw.enable=1 >/dev/null 2>&1; then
103		warn "failed to enable IPv4 firewall"
104	fi
105	if afexists inet6; then
106		if ! ${SYSCTL} net.inet6.ip6.fw.enable=1 >/dev/null 2>&1
107		then
108			warn "failed to enable IPv6 firewall"
109		fi
110	fi
111}
112
113ipfw_stop()
114{
115	local	_coscript
116
117	# Disable the firewall
118	#
119	${SYSCTL} net.inet.ip.fw.enable=0 >/dev/null
120	if afexists inet6; then
121		${SYSCTL} net.inet6.ip6.fw.enable=0 >/dev/null
122	fi
123
124	# Stop firewall coscripts
125	#
126	for _coscript in `reverse_list ${firewall_coscripts}` ; do
127		if [ -f "${_coscript}" ]; then
128			${_coscript} quietstop
129		fi
130	done
131}
132
133ipfw_status()
134{
135	status=$(sysctl -n net.inet.ip.fw.enable)
136	: ${status:=0}
137	if afexists inet6; then
138		status=$((${status} + $(sysctl -i -n net.inet6.ip6.fw.enable)))
139	fi
140	if [ ${status} -eq 0 ]; then
141		echo "ipfw is not enabled"
142		exit 1
143	else
144		echo "ipfw is enabled"
145		exit 0
146	fi
147}
148
149load_rc_config $name
150firewall_coscripts="/etc/rc.d/natd ${firewall_coscripts}"
151
152run_rc_command $*
153