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- #!/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
- # $3: quantity of the ports
- #
- # Returns:
- # 0: Success
- # 1: Fail
- #
- # Author:
- # Mitsuru Chinen <mitch@jp.ibm.com>
- #
- # History:
- # Oct 19 2005 - Created (Mitsuru Chinen)
- #
- #-----------------------------------------------------------------------
- #Uncomment line below for debug output.
- #trace_logic=${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
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