#!/bin/sh ################################################################################ ## ## ## Copyright (c) International Business Machines Corp., 2005 ## ## ## ## This program is free software; you can redistribute it and#or modify ## ## it under the terms of the GNU General Public License as published by ## ## the Free Software Foundation; either version 2 of the License, or ## ## (at your option) any later version. ## ## ## ## This program is distributed in the hope that it will be useful, but ## ## WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY ## ## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License ## ## for more details. ## ## ## ## You should have received a copy of the GNU General Public License ## ## along with this program; if not, write to the Free Software ## ## Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA ## ## ## ## ## ################################################################################ # # File: # find_portbundle # # Description: # Find a bundle of consecutive ports # # Arguments: # $1: tcp or udp # $2: port which is the start point to check # $3: quantity of the ports # # Returns: # 0: Success # 1: Fail # # Author: # Mitsuru Chinen # # History: # Oct 19 2005 - Created (Mitsuru Chinen) # #----------------------------------------------------------------------- #Uncomment line below for debug output. #trace_logic=${trace_logic:-"set -x"} $trace_logic # Make sure the value of LTPROOT LTPROOT=${LTPROOT:-`(cd ../../../../ ; pwd)`} export LTPROOT # Check argument if [ $# -ne 3 ] ; then echo "Usage: find_portbundle protocol start_port quantity_of_ports" >&2 exit 1 fi protocol=$1 start_port=$2 port_quantity=$3 # Specify the option of the nestat command case $protocol in tcp) proto_opt="-t" ;; udp) proto_opt="-u" ;; *) echo "$protocol is not supported" >&2 exit 1 ;; esac # Create the open port list port_list=`mktemp` netstat -a -n ${proto_opt} \ | tail -n +3 \ | awk '{ print $4 }' \ | sed 's/^.*://' \ | sort -n \ | uniq > ${port_list} # Search the available ports skip=1 min_port=$start_port max_port=`expr $min_port + $port_quantity - 1` if [ ${max_port} -gt 65535 ]; then rm -f $port_list exit 1 fi while read line ; do # Skip to the required port if [ $skip -eq 1 ]; then if [ $line -lt $start_port ]; then continue else skip=0 fi fi # If required quantity of the port isn't available, seach in the next range if [ $line -le $max_port ]; then min_port=`expr $line + 1` max_port=`expr $min_port + $port_quantity - 1` if [ $max_port -gt 65535 ]; then rm -f $port_list exit 1 fi continue fi break done < $port_list rm -f $port_list # Print the result. If required quantity is not 1, print in range expression if [ $min_port -eq $max_port ]; then echo "$min_port" else echo "$min_port-$max_port" fi exit 0