num2dot(1) SiLK Tool Suite num2dot(1)NAMEnum2dot - Convert an integer IP to dotted-decimal notation
SYNOPSISnum2dot [--ip-fields=FIELDS] [--delimiter=C]
num2dot--help
num2dot--version
DESCRIPTIONnum2dot is a filter to speedup sorting of IP numbers and yet result in
both a "natural" order (i.e., 29.23.1.1 will appear before 192.168.1.1)
and readable output (i.e., dotted decimal rather than an integer
representation of the IP number).
It is designed specifically to deal with the output of rwcut(1). Its
job is to read stdin and convert specified fields (default field 1)
separated by a delimiter (default '|') from an integer number into a
dotted decimal IP address. Up to three IP fields can be specified via
the --ip-fields=FIELDS option. The --delimiter option can be used to
specify an alternate delimiter.
OPTIONS
Option names may be abbreviated if the abbreviation is unique or is an
exact match for an option. A parameter to an option may be specified
as --arg=param or --arg param, though the first form is required for
options that take optional parameters.
--ip-fields=FIELDS
Column number of the input that should be considered IP numbers.
Column numbers start from 1. If not specified, the default is 1.
--delimiter=C
The character that separates the columns of the input. Default is
'|'.
--help
Print the available options and exit.
--version
Print the version number and information about how SiLK was
configured, then exit the application.
EXAMPLE
In the following example, the dollar sign ("$") represents the shell
prompt. The text after the dollar sign represents the command line.
Lines have been wrapped for improved readability, and the back slash
("\") is used to indicate a wrapped line.
Suppose in addition to the default fields of 1-12 produced by rwcut(1),
you want to prefix each row with an integer form of the destination IP
and the start time to make processing by another tool (e.g., a
spreadsheet) easier. However, within the default rwcut output fields
of 1-12, you want to see dotted-decimal IP addresses. You could use
the following command:
$ rwfilter ... --pass=stdout \
| rwcut --fields=dip,stime,1-12 --ip-format=decimal \
--timestamp-format=epoch \
| num2dot --ip-field=3,4
In the rwcut invocation, you prepend the fields of interest ("dip" and
"stime" before the standard fields. The first six columns produced by
rwcut will be dIP, sTime, sIP, dIP, sPort, dPort. The --ip-format
switch causes the first, third, and fourth columns to be printed as
integers, but you only want the first column to have an integer
representation. The pipe through num2dot will convert the third and
fourth columns to dotted-decimal IP numbers.
SEE ALSOrwcut(1), silk(7)BUGSnum2dot has no support for IPv6 addresses.
SiLK 3.11.0.1 2016-02-19 num2dot(1)
