FreeNAS Code

91 lines (77 with data), 1.9 kB

# Copyright © 2007 Volker Theile (votdev@gmx.de)
# All rights reserved.
#
# util.subr
#	functions used by various rc scripts
#

# get_if [interface]
# Get the interface. If it is set to 'auto' use the
# first interface found.
get_if()
{
	local _interface _iflist

	_interface=$1

	case ${_interface} in
		[Aa][Uu][Tt][Oo])
			_iflist=`/sbin/ifconfig -l`
			_interface=${_iflist% *}
			;;
	esac

	echo ${_interface}
}

# get_ipaddr [protocol_family] [interface]
# Get IP address for given protocol family and interface.
#
# Example:
# get_ipaddr inet eth0
# get_ipaddr inet6 auto
get_ipaddr()
{
	local _protocol_family _interface

	_protocol_family=$1
  _interface=`get_if $2`

  echo `/usr/bin/netstat -inW -f ${_protocol_family} -I ${_interface} | grep ${_interface} | awk '{print $4}'`
}

# get_subnetmask [address]
# Get subnet mask from given IP address.
#	Return subnet mask as string.
#
# Example:
# get_subnetmask 192.168.0.1/16
# get_subnetmask 3ffe:beef:13e1:4c92::cd90/48
get_subnetmask()
{
	_data=`/usr/local/bin/sipcalc $@`
	_protocol=`cat ${_data} | head -n 1 | awk '{print $1}'`
	_protocol=${_protocol#-[*}

	case ${_protocol} in
		ipv4)
			echo `cat ${_data} | grep "Network mask" | head -n 1 | awk '{print $4}'`
			;;
		ipv6)
			echo `cat ${_data} | grep "Prefix address" | awk '{print $4}'`
			;;
	esac
}

# is_validip [protocol_family] [address]
# Check if given IP is valid.
#	Return 0 if valid, nonzero otherwise.
#
# Example:
# is_validip inet 192.168.0.1/24
# is_validip inet 192.168.0.1
# is_validip inet6 3ffe:beef:13e1:4c92::cd90/48
is_validip()
{
	_protocol=$1
	shift 1

	_result=`/usr/local/bin/sipcalc $@ | head -n 1 | awk '{print $1}'`
	_result=${_result#-[*}

	if [ "ipv4" = "${_result}" -a "inet" = "${_protocol}" ]; then
		return 0
	fi
	if [ "ipv6" = "${_result}" -a "inet6" = "${_protocol}" ]; then
		return 0
	fi

	return 1
}