1 #!/bin/sh 2 3 ################################################################################ 4 ## ## 5 ## Copyright (c) International Business Machines Corp., 2005 ## 6 ## ## 7 ## This program is free software; you can redistribute it and#or modify ## 8 ## it under the terms of the GNU General Public License as published by ## 9 ## the Free Software Foundation; either version 2 of the License, or ## 10 ## (at your option) any later version. ## 11 ## ## 12 ## This program is distributed in the hope that it will be useful, but ## 13 ## WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY ## 14 ## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License ## 15 ## for more details. ## 16 ## ## 17 ## You should have received a copy of the GNU General Public License ## 18 ## along with this program; if not, write to the Free Software ## 19 ## Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA ## 20 ## ## 21 ## ## 22 ################################################################################ 23 # 24 # File: 25 # find_portbundle 26 # 27 # Description: 28 # Find a bundle of consecutive ports 29 # 30 # Arguments: 31 # $1: tcp or udp 32 # $2: port which is the start point to check 33 # $3: quantity of the ports 34 # 35 # Returns: 36 # 0: Success 37 # 1: Fail 38 # 39 # Author: 40 # Mitsuru Chinen <mitch (at] jp.ibm.com> 41 # 42 # History: 43 # Oct 19 2005 - Created (Mitsuru Chinen) 44 # 45 #----------------------------------------------------------------------- 46 #Uncomment line below for debug output. 47 #trace_logic=${trace_logic:-"set -x"} 48 $trace_logic 49 50 # Make sure the value of LTPROOT 51 LTPROOT=${LTPROOT:-`(cd ../../../../ ; pwd)`} 52 export LTPROOT 53 54 55 # Check argument 56 if [ $# -ne 3 ] ; then 57 echo "Usage: find_portbundle protocol start_port quantity_of_ports" >&2 58 exit 1 59 fi 60 protocol=$1 61 start_port=$2 62 port_quantity=$3 63 64 # Specify the option of the nestat command 65 case $protocol in 66 tcp) 67 proto_opt="-t" 68 ;; 69 udp) 70 proto_opt="-u" 71 ;; 72 *) 73 echo "$protocol is not supported" >&2 74 exit 1 75 ;; 76 esac 77 78 # Create the open port list 79 port_list=`mktemp` 80 netstat -a -n ${proto_opt} \ 81 | tail -n +3 \ 82 | awk '{ print $4 }' \ 83 | sed 's/^.*://' \ 84 | sort -n \ 85 | uniq > ${port_list} 86 87 # Search the available ports 88 skip=1 89 min_port=$start_port 90 max_port=`expr $min_port + $port_quantity - 1` 91 if [ ${max_port} -gt 65535 ]; then 92 rm -f $port_list 93 exit 1 94 fi 95 96 while read line ; do 97 # Skip to the required port 98 if [ $skip -eq 1 ]; then 99 if [ $line -lt $start_port ]; then 100 continue 101 else 102 skip=0 103 fi 104 fi 105 106 # If required quantity of the port isn't available, seach in the next range 107 if [ $line -le $max_port ]; then 108 min_port=`expr $line + 1` 109 max_port=`expr $min_port + $port_quantity - 1` 110 if [ $max_port -gt 65535 ]; then 111 rm -f $port_list 112 exit 1 113 fi 114 continue 115 fi 116 break 117 done < $port_list 118 119 rm -f $port_list 120 121 # Print the result. If required quantity is not 1, print in range expression 122 if [ $min_port -eq $max_port ]; then 123 echo "$min_port" 124 else 125 echo "$min_port-$max_port" 126 fi 127 128 exit 0 129
