ripcalc

NAME

ripcalc - a tool for network addresses

SYNOPSIS

ripcalc 127.0.0.1

ripcalc -4/--ipv4 127.0.0.1

ripcalc -6/--ipv6 ::1

ripcalc -f/--format "%a/%c\n" 127.0.0.1

ripcalc -m/--mask 28 127.0.0.1

ripcalc -c/--csv path/to/csv [-i/--field network] 127.0.0.1

ripcalc -l/--list 127.0.0.1

ripcalc -a/--available

ripcalc -s/--file [-] 127.0.0.1

ripcalc -e/--encapsulating [-s/--file name]

ripcalc -s/--file name [--inside/--outside] 127.0.0.1

ripcalc -b/--base [8, 10, 16 etc]

ripcalc -d/--divide [CIDR] 127.0.0.1/24

ripcalc --networks [CIDR] 127.0.0.1/24

ripcalc -h/--help

DESCRIPTION

ripcalc can read IPv4/IPv6 addresses from command line or standard input and output different formats or associated networks from CSV.

ripcalc can format network addresses, find matches in CSV or process a list.

ripcalc can convert input addresses that are in other number formats such as hex or octal.

Given a list of IP addresses, print only those that match the network. When s and inside are used, only addresses from -s are printed if they are that are inside of the input IP network from the command line. This can be reversed with --outside, (e.g. ripcalc -s - --inside 192.168.0.0/16).

When -a is used, addresses read from -s will not be shown when listing -l a network, showing only available addresses.

When --reverse is used the inputs, sources or both can be treated as back-to-front.

ripcalc can return a list of subnets when a network is provided along with the --divide argument and a subnet CIDR mask.

When --encapsulating is used the containing network will be returned.

The number (%D) of subnets can be printed when using the --networks argument with the %N formatters. The argument should be the CIDR mask, see below for example.

CSV

Network matches can be returned from a CSV.

  $ cat nets.csv
  network,range,owner
  rfc1918,192.168.0.0/16,bob
  rfc1918,172.16.0.0/12,cliff
  rfc1918,10.0.0.0/8,mr nobody
  $ ripcalc --csv nets.csv -i range --format '%{owner}\n' 192.168.0.0
  bob

Addresses can be read via file or from stdin (-):

  $ cat list
  127.0.0.1/28
  10.0.0.1/28
  192.168.1.1/30
  172.18.1.1/30
  10.0.0.0/30
  $ ripcalc --csv nets.csv -i range --format '%{range} %{owner}\n' -s list
  10.0.0.0/8 mr nobody
  192.168.0.0/16 bob
  172.16.0.0/12 cliff
  10.0.0.0/8 mr nobody

FORMAT

% denotes a format control character, followed by one of the following:

Additional characters prefixing the above placeholder can control the representation:

Other format characters:

%xa gives the address in hex, or %Sa to return the binary address, split at the network boundary.

When using CSV fields can be matched by name when network matched:

  --format '%{name}'

inside/outside

When --inside or --outside are given addresses that match --file are printed. If no matches are found ripcalc will exit non-zero.

subnets

For large networks it can be useful to see the number of subnets, to see the number of /29 subnets within a /24 network, the command would look like this:

  ripcalc --networks 29 192.168.230.0/24
              IP is: 192.168.230.0/24
       Broadcast is: 192.168.230.255
         Network is: 192.168.230.0
          Subnet is: 255.255.255.0
        Wildcard is: 0.0.0.255
      Networks (29): 32

Or for a IPv6 /48 network that you want to subnet into /64, you can see there are 65536 subnets:

  ripcalc --networks 64 2001:db8:1::/48
                 IP is: 2001:db8:1::/48
          Expanded: 2001:0db8:0001:0000:0000:0000:0000:0000
        Network is: 2001:0db8:0001:0000:0000:0000:0000:0000
 Last host address: 2001:0db8:0001:ffff:ffff:ffff:ffff:ffff
         Subnet is: ffff:ffff:ffff:0000:0000:0000:0000:0000
     Networks (64): 65536