freebsd/etc/rc.d/netoptions

#!/bin/sh
#
# $FreeBSD$
#

# PROVIDE: netoptions
# REQUIRE: FILESYSTEMS
# KEYWORD: nojail

. /etc/rc.subr

_netoptions_initdone=
netoptions_init()
{
	if [ -z "${_netoptions_initdone}" ]; then
		echo -n 'Additional TCP/IP options:'
		_netoptions_initdone=yes
	fi
}

load_rc_config 'XXX'

case ${log_in_vain} in
[Nn][Oo] | '')
	log_in_vain=0
	;;
[Yy][Ee][Ss])
	log_in_vain=1
	;;
[0-9]*)
	;;
*)
	netoptions_init
	echo " invalid log_in_vain setting: ${log_in_vain}"
	log_in_vain=0
	;;
esac

if [ "${log_in_vain}" -ne 0 ]; then
	netoptions_init
	echo -n " log_in_vain=${log_in_vain}"
	sysctl net.inet.tcp.log_in_vain="${log_in_vain}" >/dev/null
	sysctl net.inet.udp.log_in_vain="${log_in_vain}" >/dev/null
fi

case ${tcp_extensions} in
[Yy][Ee][Ss] | '')
	;;
*)
	netoptions_init
	echo -n ' tcp extensions=NO'
	sysctl net.inet.tcp.rfc1323=0 >/dev/null
	;;
esac

case ${tcp_keepalive} in
[Nn][Oo])
	netoptions_init
	echo -n ' TCP keepalive=NO'
	sysctl net.inet.tcp.always_keepalive=0 >/dev/null
	;;
esac

case ${tcp_drop_synfin} in
[Yy][Ee][Ss])
	netoptions_init
	echo -n ' drop SYN+FIN packets=YES'
	sysctl net.inet.tcp.drop_synfin=1 >/dev/null
	;;
esac

case ${ip_portrange_first} in
[Nn][Oo] | '')
	;;
*)
	netoptions_init
	echo -n " ip_portrange_first=$ip_portrange_first"
	sysctl net.inet.ip.portrange.first=$ip_portrange_first >/dev/null
	;;
esac

case ${ip_portrange_last} in
[Nn][Oo] | '')
	;;
*)
	netoptions_init
	echo -n " ip_portrange_last=$ip_portrange_last"
	sysctl net.inet.ip.portrange.last=$ip_portrange_last >/dev/null
	;;
esac

[ -n "${_netoptions_initdone}" ] && echo '.'