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

# PROVIDE: tcpmss
# BEFORE: ipfw
# REQUIRE: netif
# KEYWORD: nojail

. /etc/rc.subr

name="tcpmss"
rcvar="${name}_enable"
start_cmd="${name}_start"
start_precmd="${name}_prestart"
stop_cmd="${name}_stop"

tcpmss_prestart() {
	[ -n "$1" ] && tcpmss_instances="$1"
	[ -z "$tcpmss_instances" ] && return 1
	required_modules="netgraph ng_ipfw ng_tcpmss"
}

tcpmss_start()
{
	local	_i _m _v

	[ -n "$1" ] && tcpmss_instances="$1"
	checkyesno tcpmss_verbose && _v=yes

	rc=0
	for _i in $tcpmss_instances
	do
	    # get value of tcpmss_NAME="1452"
	    eval _m=\"\$tcpmss_${_i}\"
	    if [ -z "$_m" ]; then
		echo "Warning: variable tcpmss_$_i not defined" >&2
		continue
	    fi
	    [ -n "$_v" ] && echo -n "Setup ng_tcpmss instance $_i: mss=$_m"
	    ngctl mkpeer ipfw: tcpmss $_i mss_$_i && ngctl msg ipfw:$_i config \
		'{ inHook="'mss_$_i'" outHook="'mss_$_i'" maxMSS='$_m' }' && \
	    ngctl name ipfw:$_i mss_$_i
	    rc=$(($rc + $?))
	
	    [ -n "$_v" ] && echo .
	done

	return $rc
}

tcpmss_stop()
{
	local	_i _v

	[ -n "$1" ] && tcpmss_instances="$1"
	checkyesno tcpmss_verbose && _v=yes

	rc=0
	for _i in $tcpmss_instances
	do
	    [ -n "$_v" ] && echo -n "Shutdown ng_tcpmss instance $_i"
	    ngctl shutdown mss_${_i}:
	    rc=$(($rc + $?))
	    [ -n "$_v" ] && echo .
	done

	return $rc

	kldunload ng_ipfw ng_tcpmss netgraph 
}

load_rc_config $name
run_rc_command "$@"