FreeNAS Code

70 lines (60 with data), 1.5 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 family] [address] [netmask] [mask]  
# Get subnet mask from given IP address.
#	Return subnet mask as string.
#
# Example:
# get_subnetmask inet 192.168.0.1/16
# get_subnetmask inet 192.168.0.1 prefixlen 16
# get_subnetmask inet6 3ffe:beef:13e1:4c92::cd90/48
get_subnetmask()
{
	echo `/usr/local/bin/subcalc $@ | grep "mask:" | awk '{print $2}'`
}

# is_validip [address family] [address] [netmask] [mask]
# 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 netmask 255.255.255.0
# is_validip inet 192.168.0.1 prefixlen 24
# is_validip inet6 3ffe:beef:13e1:4c92::cd90/48
is_validip()
{
	/usr/local/bin/subcalc $@
	return $?
}