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< # Copyright (c) 2006-2012 Devin Teske
---
> # Copyright (c) 2006-2013 Devin Teske
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< # $FreeBSD: head/usr.sbin/bsdconfig/networking/share/netmask.subr 244675 2012-12-25 10:47:45Z dteske $
---
> # $FreeBSD: head/usr.sbin/bsdconfig/networking/share/netmask.subr 247280 2013-02-25 19:55:32Z dteske $
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< # f_ifconfig_netmask $interface
< #
< # Returns the IPv4 subnet mask associated with $interface.
< #
< f_ifconfig_netmask()
< {
< local interface="$1" octets
< octets=$( ifconfig "$interface" 2> /dev/null | awk \
< '
< BEGIN { found = 0 }
< ( $1 == "inet" ) \
< {
< printf "%s %s %s %s\n",
< substr($4,3,2),
< substr($4,5,2),
< substr($4,7,2),
< substr($4,9,2)
< found = 1
< exit
< }
< END { exit ! found }
< ' ) || return $FAILURE
<
< local octet netmask=
< for octet in $octets; do
< netmask="$netmask${netmask:+.}$( printf "%u" "0x$octet" )"
< done
< echo $netmask
< }
<
< # f_validate_netmask $netmask
< #
< # Returns zero if the given argument (a subnet mask) is of the proper format.
< #
< # The return status for invalid IP address is one of:
< # 1 One or more individual fields within the subnet mask (separated
< # by dots) contains one or more invalid characters.
< # 2 One or more individual fields within the subnet mask are null
< # and/or missing.
< # 3 One or more individual fields within the subnet mask exceeds
< # the maximum of 255 (a full 8-bit register).
< # 4 The subnet mask has either too few or too many fields.
< # 5 One or more individual fields within the subnet mask is an
< # invalid integer (only 0,128,192,224,240,248,252,254,255 are
< # valid integers).
< #
< f_validate_netmask()
< {
< local mask="$1"
<
< ( # Operate within a sub-shell to protect the parent environment
<
< # Track number of fields for error checking
< nfields=0
<
< IFS="." # Split on `dot'
< for field in $mask; do
<
< # Return error if the field is null
< [ "$field" ] || exit 2
<
< # Return error if not a whole positive integer
< f_isinteger "$field" || exit 1
<
< # Return error if the field exceeds 255
< [ $field -gt 255 ] && exit 3
<
< # Return error if the field is an invalid integer
< case "$field" in
< 0|128|192|224|240|248|252|254|255) :;;
< *) exit 5;;
< esac
<
< nfields=$(( $nfields + 1 ))
<
< done
<
< [ $nfields -eq 4 ] || exit 4
< )
< }
<