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Perl Programming: The Complete Documentation

• This category contains 6 Papers
• The last paper was added on 2007-03-26 (YYYY-MM-DD)

Building a wireless sniffer with Perl

Published on 2005-01-12, by Peter Seebach, ©IBM.

One of the best ways to make sure information is kept secure is to broadcast it using a published standard, and to try to make sure the signal goes as far as possible. Right? Well, maybe that isn't the best strategy after all. Unfortunately for us, the convenience of wireless access to a network means that a lot of people use a wireless network, and that means that a lot of data is being broadcast in the clear.

In this article, I'll build a lightweight wireless sniffer that runs on open source software. You'll see how simple it is to interact with wireless networks. The information the sniffer collects offers some insights on key wireless security issues.

It's easy to underestimate the availability of wireless networks. During testing for this article, I had a recurring problem: my equipment kept accidentally picking up networks other than the ones I wanted to test. In fact, my laptop has found wireless networks to associate with while I'm traveling on the freeway! So, one obvious thing for a wireless network scanner to do is to identify the names and signal strengths of local wireless networks.

Lightning Articles

Published on 2004-09-09, by Simon Cozens, ©O'Reilly Media, Inc..

Serendipity -- it means those occasions when things come together to give you moments of inspiration. While preparing perl.com one week, I was editing an article on how to give lightning talks by Mark Fowler and at the same time I was dealing with another author who said he was having difficulty stretching out an article -- a very good article, on a topic I wanted to see covered -- to a full 2,500-words-or-so length.

Manipulating Word Documents with Perl

Published on 2005-05-26, by Andrew Savikas, ©O'Reilly Media, Inc..

In a recent lightning article, Customizing Emacs with Perl, Bob DuCharme explained how to use the Emacs shell-command-on-region function to invoke a Perl script on a marked region of text. Bob writes that he was reluctant to invest the time needed to write the elisp code needed for a particular string manipulation, especially when he knew how much easier it would be for him to do that manipulation with Perl. However, by using the Emacs function shell-command-on-region, Bob could have his cake an eat it too--keep editing with Emacs, while using Perl on demand for string manipulation.

Perl Parser Performance

Published on 2004-09-15, by Petr Cimprich, ©O'Reilly Media, Inc..

There was one dominant XML parser in Perl a few years ago; parsing an XML document was synonymous for using the XML::Parser module. The module written by Larry Wall and Clark Cooper worked as an interface to James Clark's expat XML parser, and it didn't leave much room for competitors. Traditional Perl modules for XML processing were built on the top of XML::Parser.

Use IMAP with Perl (part 1)

Published on 2003-06-19, by Teodor Zlatanov, ©International Business Machines Corporation.

Ted introduces you to accessing IMAP with the Mail::IMAPClient CPAN module. Using Mail::IMAPClient, he built the ifrom utility as an alternative to other IMAP and POP3 mail checkers. ifrom has its own unique advantages that can be used for listing, printing, and moving messages on an IMAP server, and backing up IMAP mail.

Use IMAP with Perl (part 2)

Published on 2005-05-19, by Teodor Zlatanov, ©International Business Machines Corporation.

Ted returns to the subject of accessing IMAP with the Mail::IMAPClient by looking at ifrom.pl as an alternative to other IMAP and POP3 mail checkers. This time around Ted covers tunneling (or port forwarding as it is sometimes called), as well as applying the script to the Maildir mail-storage format.