jiptables-L (Source) 

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
 
#!/bin/bash
##---------------------------------------------------------------------------##
#   Script:  jiptables-L
#   Author:  Brian <genius@groupbcl.ca> :)
#   Date:    Christmas Day 2019
#
#   Creates a pretty-printed output of the "iptables -L" command for iptables
#   tables (throws in -v and --line-numbers for good measure.) The user can
#   include other switches as desired. Output is to stdout.
##---------------------------------------------------------------------------##
#   BUUS: This script is part of Brian's Useful Utilities Set

if [ "$1" == '-h' -o "$1" == '--help' ]
then
    echo "Usage: jiptables-L [-n|--numeric] [-x|--exact] [table ...]"
    echo "  iptables is always called with -L, --verbose, and --line-numbers"
    echo "  table 'all' displays all tables (raw mangle filter nat security)"
    echo "  If not given, table defaults to 'filter'"
    exit 0
fi

while [ "$1" ]
do
    if [ "${1:0:1}" == '-' ]
    then
        [ "$1" == '-n' -o "$1" == '--numeric' ] && IPT_NUMERIC='-n'
        [ "$1" == '-x' -o "$1" == '--exact' ] && IPT_EXACT='-x'
    else
        if [ "$1" == 'all' ]
        then
            TABLE_LIST='raw mangle filter nat security'
        else
            TABLE_LIST="$TABLE_LIST $1"
        fi
    fi
    shift
done

[ "$TABLE_LIST" ] || TABLE_LIST='filter'

# Process the requestesd tables
for TABLE in $TABLE_LIST
do
    # The alphabet causes the 'column' command to create dummy columns for the
    # informational lines; the 'a'-'z' characters are later removed
    echo "a b c d e f g h i j k l m n o p q r s t u v w x y z -----+$TABLE+table+-----"
    # Get a verbose listing of the table and number the rules
    iptables -t $TABLE -L -v --line-numbers $IPT_NUMERIC $IPT_EXACT
done |
 # Add a new column named 'additional' on the 'Chain' informational lines
 # Changes spaces to '+' on the 'Chain' line to prevent 'column' from columnising the text
 sed 's/destination[[:space:]]*$/destination additional/; /^Chain/ s/ /+/g' |
  # (See above for why we add the alphabet to the 'Chain' lines)
  sed 's/^\(Chain\)/a b c d e f g h i j k l m n o p q r s t u v w x y z \1/' |
  # Create a table from the output
  column -t |
  # In the informational lines ('Chain' and '----- x table'), change '+' back to spaces
  sed '/^a .* z/ s/+/ /g' |
  # Remove the (columnized) alphabet characters from the informational lines
  sed 's/^a .* y *z *\(.*\)/\n\1/' |
  # Determine where on the line the 'addtional' column starts
  # Decolumnize (that is, remove extra spaces from) the 'additional' colum
  awk '
    /additional[[:space:]]*$/ && ! p { p = index($0, "additional") }
    /^[1-9]/ && length > p { $0 = substr($0, 1, p-1) gensub(/ +/, " ", "G", substr($0, p)) }
    { print }'

# vim: tabstop=4