#
# Copyright (c) 2003 The FreeBSD Project. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD$
#

#
# Subroutines commonly used from network startup scripts.
# Requires that rc.conf be loaded first.
#

# ifconfig_up if
#	Evaluate ifconfig(8) arguments for interface $if and
#	run ifconfig(8) with those arguments. It returns 0 if
#	arguments were found and executed or 1 if the interface
#	had no arguments.
#
ifconfig_up()
{
	eval ifconfig_args=\$ifconfig_$1
	if [ -n "${ifconfig_args}" ]; then
		ifconfig $1 ${ifconfig_args}
		return 0
	fi
	return 1
}

# ifalias_up if
#	Configure aliases for network interface $if.
#	It returns 0 if at least one alias was configured or
#	1 if there were none.
#
ifalias_up()
{
	_ret=1
	alias=0
	while : ; do
		eval ifconfig_args=\$ifconfig_$1_alias${alias}
		if [ -n "${ifconfig_args}" ]; then
			ifconfig $1 ${ifconfig_args} alias
			alias=$((${alias} + 1))
			_ret=0
		else
			break
		fi
	done
	return $_ret
}

# ifscript_up if
#	Evaluate a startup script for the $if interface.
#	It returns 0 if a script was found and processed or
#	1 if no script was found.
#
ifscript_up()
{
	if [ -r /etc/start_if.$1 ]; then
		. /etc/start_if.$1
		return 0
	fi
	return 1
}

# Create cloneable interfaces.
#
clone_up()
{
	_prefix=
	_list=
	for ifn in ${cloned_interfaces}; do
		ifconfig ${ifn} create
		if $? ; then
			_list="${_list}${_prefix}${ifn}"
			[ -z "$_prefix" ] && _prefix=' '
		fi
	done
	debug "Cloned: ${_list}"
}

# Destroy cloned interfaces. Destroyed interfaces are echoed
# to standard output.
#
clone_down()
{
	_prefix=
	_list=
	for ifn in ${cloned_interfaces}; do
		ifconfig ${ifn} destroy
		if $? ; then
			_list="${_list}${_prefix}${ifn}"
			[ -z "$_prefix" ] && _prefix=' '
		fi
	done
	debug "Destroyed clones: ${_list}"
}

gif_up() {
	case ${gif_interfaces} in
	[Nn][Oo] | '')
		;;
	*)
		for i in ${gif_interfaces}; do
			eval peers=\$gifconfig_$i
			case ${peers} in
			'')
				continue
				;;
			*)
				ifconfig $i create >/dev/null 2>&1
				ifconfig $i tunnel ${peers}
				ifconfig $i up
				;;
			esac
		done
		;;
	esac
}

#
# ipx_up ifn
# Configure any IPX addresses for interface $ifn. Returns 0 if IPX
# arguments were found and configured; returns 1 otherwise.
#
ipx_up()
{
	ifn="$1"
	eval ifconfig_args=\$ifconfig_${ifn}_ipx
	if [ -n "${ifconfig_args}" ]; then
		ifconfig ${ifn} ${ifconfig_args}
		return 0
	fi
	return 1
}

#
# list_net_interfaces type
#	List all network interfaces. The type of interface returned
#	can be controlled by the type argument. The type
#	argument can be any of the following:
#		nodhcp - all interfaces, excluding DHCP configured interfaces
#		dhcp   - list only DHCP configured interfaces
#	If no argument is specified all network interfaces are output.
#	Note that the list always includes cloned interfaces.
#
list_net_interfaces()
{
	type=$1

	# Get a list of ALL the interfaces
	#
	case ${network_interfaces} in
	[Aa][Uu][Tt][Oo])
		_tmplist="`ifconfig -l`"
		;;
	*)
		_tmplist="${network_interfaces}"
		;;
	esac
	_tmplist="${_tmplist} ${cloned_interfaces}"

	if [ -z "$type" ]; then
		echo $_tmplist
		return 0
	fi

	# Separate out dhcp and non-dhcp intefraces
	#
	_aprefix=
	_brefix=
	for _if in ${_tmplist} ; do
		eval _ifarg="\$ifconfig_${_if}"
		case "$_ifarg" in
		[Dd][Hh][Cc][Pp])
			_dhcplist="${_dhcplist}${_aprefix}${_if}"
			[ -z "$_aprefix" ] && _aprefix=' '
			;;
		''|*)
			_nodhcplist="${_nodhcplist}${_bprefix}${_if}"
			[ -z "$_bprefix" ] && _bprefix=' '
			;;
		esac
	done

	case "$type" in
	nodhcp)
		echo $_nodhcplist
		;;
	dhcp)
		echo $_dhcplist
		;;
	esac
	return 0			
}