Shell Programming and Scripting

212   0.00000            ? -> (multicast)  ETHER Type=2000 (Unknown), size = 344 bytes

           0: 0100 0ccc cccc 000b 5f95 0fbe 014a aaaa    ........_....J..
          16: 0300 000c 2000 02b4 3fca 0001 0024 5442    .... ...?....$TB
          32: 4130 3533 3530 3639 3528 3533 3063 732d    A05350695(630cs-
          48: 6336 3530 392d 3364 6363 332d 3129 0002    c6509-3dcc3-1)..
          64: 0011 0000 0001 0101 cc00 040a 0000 0200    ................
          80: 0300 0836 2f32 3300 0400 0800 0000 2a00    ...6/23.......*.
          96: 0500 6457 532d 4336 3530 3920 536f 6674    ..dWS-C6509 Soft
         112: 7761 7265 2c20 5665 7273 696f 6e20 4d63    ware, Version Mc
         128: 7053 573a 2037 2e33 2832 2920 4e6d 7053    pSW: 7.3(2) NmpS
         144: 573a 2037 2e33 2832 290a 436f 7079 7269    W: 7.3(2).Copyri
         160: 6768 7420 2863 2920 3139 3935 2d32 3030    ght (c) 1995-200
         176: 3220 6279 2043 6973 636f 2053 7973 7465    2 by Cisco Syste
         192: 6d73 0a00 0600 0c57 532d 4336 3530 3900    ms.....WS-C6509.
         208: 0900 086d 6169 6e00 0a00 0600 7100 0b00    ...main.....q...
         224: 0501 0012 0005 0000 1300 0500 0014 0017    ................
         240: 3533 3063 732d 6336 3530 392d 3364 6363    630cs-c6509-3dcc
         256: 332d 3100 1500 0e06 082b 0601 0401 0905    3-1......+......
         272: 2c00 1600 1100 0000 0101 01cc 0004 0a00    ,...............
         288: 0002 0017 0036 0035 3330 2063 6f6c 6c69    .....6.630 cobbi
         304: 6e73 2053 7472 6565 742c 204c 6576 656c    ns Street, Level
         320: 332c 2044 6174 6120 4365 6e74 7265 2c20    3, Data Centre,
         336: 4361 6269 6e65 7433                        Cabinet3

A05350695(630cs-c6509-3dcc3-1)

Switch Port 6/23

WS-C6509 Software, Version McSW: 7.3(2) NmpSW: 7.3(2)
Copyright (c) 1995-2002 by Cisco Systems

630cs-c6509-3dcc3-1
630 cobbins Street, Level3, Data Centre, Cabinet3

$ cat reader
#! /usr/bin/ksh

exec < text
read garbage
read garbage


item1=""
item2=""

IFS=""
while read line ; do
        line=${line##+( )}
        address=${line%%: *}
        line=${line##*    }
        echo address = $address "    " line ="\"$line"\"
        case $address in
        32)
                item1="$line"
                ;;
        48)
                line=${line%%.*}
                item1="${item1}${line}"
                ;;
        80)
                line=${line#???}
                line=${line%%.*}
                item2="$line"
                ;;
        esac
done

echo item1 = $item1
echo item2 = $item2

exit 0
$ ./reader
address = 0      line ="........_....J.."
address = 16      line =".... ...?....$TB"
address = 32      line ="A05350695(630cs-"
address = 48      line ="c6509-3dcc3-1).."
address = 64      line ="................"
address = 80      line ="...6/23.......*."
address = 96      line ="..dWS-C6509 Soft"
address = 112      line ="ware, Version Mc"
address = 128      line ="pSW: 7.3(2) NmpS"
address = 144      line ="W: 7.3(2).Copyri"
address = 160      line ="ght (c) 1995-200"
address = 176      line ="2 by Cisco Syste"
address = 192      line ="ms.....WS-C6509."
address = 208      line ="...main.....q..."
address = 224      line ="................"
address = 240      line ="630cs-c6509-3dcc"
address = 256      line ="3-1......+......"
address = 272      line =",..............."
address = 288      line =".....6.630 cobbi"
address = 304      line ="ns Street, Level"
address = 320      line ="3, Data Centre,"
address = 336      line ="Cabinet3"
address =      line =""
item1 = A05350695(630cs-c6509-3dcc3-1)
item2 = 6/23
$

awk 'BEGIN{
        for(i=0; i<=256; i++)
           a[sprintf("%02x",i)] = ((i<32||i>126) ? "\n" : sprintf("%c",i))
     }
     $1~/:$/{
        for(i=2; i<=9; i++)
           if($i ~ /^....$/)
              printf a[substr($i,1,2)] a[substr($i,3,2)]
     }' file1 | awk NF

_
J
?
$TBA05350695(530cs-c6509-3dcc3-1)
6/23
*
dWS-C6509 Software, Version McpSW: 7.3(2) NmpSW: 7.3(2)
Copyright (c) 1995-2002 by Cisco Systems
WS-C6509
main
q
530cs-c6509-3dcc3-1
+
,
6
530 collins Street, Level3, Data Centre, Cabinet3

#!/bin/ksh

    INT=$1

    echo "Collecting packets on the network..."
    snoop -d $INT -o /tmp/of.1 &
    #
    # every 60 seconds Cisco sends out a packet that contains good information
    #
    echo "0 sec.."
    sleep 15
    echo "15 sec.."
    sleep 15
    echo "30 sec.."
    sleep 15
    echo "45 sec.."
    sleep 15
    echo "60 sec.."
    sleep 3
    echo "63 sec.."
    #
    # we will wait for 60+ seconds to make sure we get the special packet
    #
    pkill snoop
    #
    # the ether packet type 2000 needs to be found
    #
    echo "Creating ASCII file..."
    snoop -vv -i /tmp/of.1 > /tmp/of.2
    #
    # get the line number the ether packet type 2000 is at
    #
    line=`grep -n "ETHER:  Ethertype = 2000 (Unknown)" /tmp/of.2 | awk '{FS=":"} { print $1 }' | head -1`
    if [ -z $line ]; then
            echo "Could not find a CDP packet, exiting."
            rm /tmp/of.1 /tmp/of.2
            exit 1
    fi

    echo "Found the Ethertype = 0x2000 on line = $line..."
    #
    # from the line go back 6 and pick out the first line and then the 3rd field = packet number
    #
    packetnumber=`cat /tmp/of.2 | head -${line} | tail -6 | head -1 | awk '{ print $3 }'`
    echo "Found the Ethertype = 0x2000 in packet = $packetnumber..."
    #
    # get the content of the packet which has the switch port the server is plugged into
    #
    snoop -i /tmp/of.1 -p${packetnumber} -x 0 >> /tmp/of.3
    #

cat /tmp/of.3 | sed -e 's/     *//' >> /tmp/of.4

    exec < of.4
    read garbage
    read garbage

    SN=""
    PORT=""
    SW=""
    LCT=""

    IFS=""
    while read line ; do
        line=${line##+( )}
        address=${line%%: *}
        line=${line##*    }
#       echo address = $address "" line ="\"$line"\"
        case $address in
        32)
                SN="$line"
                ;;
        48)
                line=${line%%.*}
                SN="${SN}${line}"
                ;;
        80)
                line=${line#???}
                line=${line%%.*}
                PORT="$line"
                ;;
        96)
                line=${line#??}
                SW="$line"
                ;;
        112)
                line="$line"
                SW="${SW}${line}"
                ;;
        128)
                    line="$line"
                SW="${SW}${line}"
                ;;
        144)
                line="$line"
                SW="${SW}${line}"
                ;;
        160)
                line="$line"
                SW="${SW}${line}"
                ;;
        176)
                line="$line"
                SW="${SW}${line}"
                ;;
        192)
                line=${line%%.*}
                SW="${SW}${line}"
                ;;
        288)
                line=${line#???????}
                LCT="$line"
                ;;
        304)
                line="$line"
                LCT="${LCT}${line}"
                ;;
        320)
                line="$line"
                LCT="${LCT}${line}"
                ;;
        336)
                line="$line"
                LCT="${LCT}${line}"
                ;;
        esac
    done

    echo""
    echo""
    echo "     `uname -n` is connected to CISCO Switch $SN , Port $PORT"
    echo "     The switch is located at $LCT"
    echo "     and has the following software loaded:"
    echo "     $SW"
    echo""
    echo""

rm /tmp/of.1 /tmp/of.2 /tmp/of.3 /tmp/of.4
exit 0

# cat -vet whichport | grep sed
cat /tmp/of.3 | sed -e 's/^I*//' >> /tmp/of.4$
#

#!/bin/ksh
#

echo "Collecting packets on the network..."
snoop -d $1 -o /tmp/of.1 &
#
# every 60 seconds Cisco sends out a packet that contains good information
#
echo "0 sec.."
sleep 15
echo "15 sec.."
sleep 15
echo "30 sec.."
sleep 15
echo "45 sec.."
sleep 15
echo "60 sec.."
sleep 3
echo "63 sec.."
#
# we will wait for 60+ seconds to make sure we get the special packet
#
pkill snoop
#
# the ether packet type 2000 needs to be found
#
echo "Creating ASCII file..."
snoop -vv -i /tmp/of.1 > /tmp/of.2
#
# get the line number the ether packet type 2000 is at
#
line=`grep -n "ETHER:  Ethertype = 2000 (Unknown)" /tmp/of.2 | awk '{FS=":"} { print $1 }' | head -1`
if [ -z $line ]; then
        echo "Could not find a CDP packet, exiting."
        rm /tmp/of.1 /tmp/of.2
        exit 1
fi

echo "Found the Ethertype = 0x2000 on line = $line..."
#
# from the line go back 6 and pick out the first line and then the 3rd field = packet number
#
packetnumber=`cat /tmp/of.2 | head -${line} | tail -6 | head -1 | awk '{ print $3 }'`
echo "Found the Ethertype = 0x2000 in packet = $packetnumber..."
#
# get the content of the packet which has the switch port the server is plugged into
#
snoop -i /tmp/of.1 -p${packetnumber} -x 0 >> /tmp/of.3

nawk 'BEGIN{
        for(i=0; i<=256; i++)
           a[sprintf("%02x",i)] = ((i<32||i>126) ? "\n" : sprintf("%c",i))
     }
     $1~/:$/{
        for(i=2; i<=9; i++)
           if($i ~ /^....$/)
              printf a[substr($i,1,2)] a[substr($i,3,2)]
     }' /tmp/of.3 | nawk NF

rm /tmp/of.1 /tmp/of.2 /tmp/of.3
exit 0