How can I use sockets in Perl? Is there a module?

Question

How to do socket programing in Perl? Is there any module for it?

I am trying to do socket programming in Perl. I want to know if there are any modules to do this.

And another one question: Is it possible to do the multiple servers listen to one port, or multiple client listen to one port through socket programming?

Answer 1

IO::Socket module

Socket Programming in PERL

Answer 2

Is it possible to do the multiple servers listen to one port, or multiple client listen to one port through socket programming?

This has nothing to do with Perl: Only one application can be listening on a given port at any given point in time.

Also, unless you are implementing a custom protocol, there is really no good reason to deal with sockets in Perl. There are excellent modules for all commonly used protocols.

Answer 3

About multiple programs using the same socket, see option ReusePort on IO::Socket::INET. This allows other programs to later listen on that port too. For more information on reuse, search for "SO_REUSEPORT" which is the C library option name.

See the discussion here for more info on scaling using that technique (if that's your intention): http://kerneltrap.org/mailarchive/linux-netdev/2008/8/7/2851754

Answer 4

The perlipc doc has a gentle introduction to using sockets with some good example code.

Answer 5

I always point folks to IO::Lambda. It's a beautifully elegant way to deal with sockets and file descriptors of any kind.