"NetInfo" An IP Calculator for the Palm Handheld

Table of Contents

1. Overview
2. Download
3. Syntax
   1. IP Address Component
   2. Separator
   3. Netmask Component
   4. Shortcuts
4. Website
5. Feedback

Overview

• Network address.
• Dotted quad version of the network mask.
• Hexadecimal version of the network mask.
• Broadcast address.
• The first host address on the network.
• The last host address on the network.
• The number of hosts on the network (excludes network and broadcast addresses).

The netmask may be entered in several different formats. CIDR style number of bits, dotted quad or hexadecimal. See the Syntax section for details.

Zip format: netinfo114.zip

Gzipped tar format: netinfo-1.14.tgz

Md5sum of netinfo.prc is 0cfb99c26c72414d024ada861c18996d

Syntax

IP Address Component

• Must consist of at least one digit.
• May contain up to four dotted quad components.
• Each dotted quad component must be <= 255.

Separator

• The separator character "/" is mandatory. As of version 1.12 this may also be a "\" character.

Netmask Component

• Must be present.
• May be a CIDR style "number of bits" such as 1.2.3.4/24.
• If it is a CIDR style "number of bits", it must be >= 1 and <= 32.
• May be a dotted quad format such as 1.2.3.4/255.255.255.0.
• If it is a dotted quad format, each component must be < 256.
• If it is a dotted quad format, there must be at least one 'dot'. ie 1.2.3.4/255.0 is OK, 1.2.3.4/255 is not.
• May be hexadecimal format such as 1.2.3.4/0xffffff00.
• If it is a hexadecimal format, it must begin with "0x".
• Must be a valid netmask.

A netmask is checked for the following conditions:

• For dotted quad and hexadecimal formats, the netmask when converted to a binary number, must be a continuous series of ones.

  The following is valid:

  0xff8 or 255.128

  These convert to a binary number like:

  11111111100000000000000000000000

  The following is invalid:

  0xff1 or 255.1

  These convert to a binary number like:

  11111111000000010000000000000000

Shortcuts

For example, the following will work:

1/8

1/255.0

1/0xff

Website

Feedback