#!/bin/bash# $Id: get-iana.sh,v 1.12 2008/03/17 22:08:43 ktsaou Exp $## $Log: get-iana.sh,v $# Revision 1.12 2008/03/17 22:08:43 ktsaou# Updated for latest IANA reservations format.## Revision 1.11 2007/06/13 14:40:04 ktsaou# *** empty log message ***## Revision 1.10 2007/05/05 23:38:31 ktsaou# Added support for external definitions of:## RESERVED_IPS# PRIVATE_IPS# MULTICAST_IPS# UNROUTABLE_IPS## in files under the same name in /etc/firehol/.# Only RESERVED_IPS is mandatory (firehol will complain if it is not there,# but it will still work without it), and is also the only file that firehol# checks how old is it. If it is 90+ days old, firehol will complain again.## Changed the supplied get-iana.sh script to generate the RESERVED_IPS file.# FireHOL also instructs the user to use this script if the file is missing# or is too old.## Revision 1.9 2007/04/29 19:34:11 ktsaou# *** empty log message ***## Revision 1.8 2005/06/02 15:48:52 ktsaou# Allowed 127.0.0.1 to be in RESERVED_IPS## Revision 1.7 2005/05/08 23:27:23 ktsaou# Updated RESERVED_IPS to current IANA reservations.## Revision 1.6 2004/01/10 18:44:39 ktsaou# Further optimized and reduced PRIVATE_IPS using:# http://www.vergenet.net/linux/aggregate/## The supplied get-iana.sh uses 'aggregate-flim' if it finds it in the path.# (aggregate-flim is the name of this program when installed on Gentoo)## Revision 1.5 2003/08/23 23:26:50 ktsaou# Bug #793889:# Change #!/bin/sh to #!/bin/bash to allow FireHOL run on systems that# bash is not linked to /bin/sh.## Revision 1.4 2002/10/27 12:44:42 ktsaou# CVS test### Program that downloads the IPv4 address space allocation by IANA# and creates a list with all reserved address spaces.#IPV4_ADDRESS_SPACE_URL="http://www.iana.org/assignments/ipv4-address-space"# The program will match all rows in the file which start with a number, have a slash,# followed by another number, for which the following pattern will also match on the# same rowsIANA_RESERVED="(RESERVED|UNALLOCATED)"# which rows that are matched by the above, to ignore# (i.e. not include them in RESERVED_IPS)?#IANA_IGNORE="(Multicast|Private use|Loopback|Local Identification)"IANA_IGNORE="Multicast"tempfile="/tmp/iana.$$.$RANDOM"AGGREGATE="`which aggregate-flim 2>/dev/null`"if [ -z "${AGGREGATE}" ]then AGGREGATE="`which aggregate 2>/dev/null`"fiif [ -z "${AGGREGATE}" ]then echo >&2 echo >&2 echo >&2 "WARNING" echo >&2 "Please install 'aggregate-flim' to shrink the list of IPs." echo >&2 echo >&2fiecho >&2echo >&2 "Fetching IANA IPv4 Address Space, from:"echo >&2 "${IPV4_ADDRESS_SPACE_URL}"echo >&2wget -O - --proxy=off "${IPV4_ADDRESS_SPACE_URL}" |\ egrep "^[0-9]+/[0-9]+.*${IANA_RESERVED}" |\ egrep -vi "${IANA_IGNORE}" |\ cut -d ' ' -f 1 |\( while IFS="/" read range net do if [ ! $net -eq 8 ] then echo >&2 "Cannot handle network masks of $net bits ($range/$net)" continue fi first=`echo $range | cut -d '-' -f 1` first=`expr $first + 0` last=`echo $range | cut -d '-' -f 2` last=`expr $last + 0` x=$first while [ ! $x -gt $last ] do # test $x -ne 127 && echo "$x.0.0.0/$net" echo "$x.0.0.0/$net" x=$[x + 1] done done) | \( if [ ! -z "${AGGREGATE}" -a -x "${AGGREGATE}" ] then "${AGGREGATE}" else cat fi) >"${tempfile}"echo >&2echo >&2echo >&2 "FOUND THE FOLLOWING RESERVED IP RANGES:"printf "RESERVED_IPS=\""i=0for x in `cat ${tempfile}`do i=$[i + 1] printf "${x} "doneprintf "\"\n"if [ $i -eq 0 ]then echo >&2 echo >&2 echo >&2 "Failed to find reserved IPs." echo >&2 "Possibly the file format has been changed, or I cannot fetch the URL." echo >&2 rm -f ${tempfile} exit 1fiecho >&2echo >&2echo >&2 "Differences between the fetched list and the list installed in"echo >&2 "/etc/firehol/RESERVED_IPS:"echo >&2 "# diff /etc/firehol/RESERVED_IPS ${tempfile}"diff /etc/firehol/RESERVED_IPS ${tempfile}if [ $? -eq 0 ]then echo >&2 echo >&2 "No differences found." echo >&2 rm -f ${tempfile} exit 0fiecho >&2echo >&2echo >&2 "Would you like to save this list to /etc/firehol/RESERVED_IPS"echo >&2 "so that FireHOL will automatically use it from now on?"echo >&2while [ 1 = 1 ]do printf >&2 "yes or no > " read x case "${x}" in yes) cp -f /etc/firehol/RESERVED_IPS /etc/firehol/RESERVED_IPS.old 2>/dev/null cat "${tempfile}" >/etc/firehol/RESERVED_IPS || exit 1 echo >&2 "New RESERVED_IPS written to '/etc/firehol/RESERVED_IPS'." break ;; no) echo >&2 "Saved nothing." break ;; *) echo >&2 "Cannot understand '${x}'." ;; esacdonerm -f ${tempfile}