| IO::Socket::INET - Object interface for AF_INET domain sockets |
IO::Socket::INET - Object interface for AF_INET domain sockets
use IO::Socket::INET;
IO::Socket::INET provides an object interface to creating and using sockets
in the AF_INET domain. It is built upon the the IO::Socket manpage interface and
inherits all the methods defined by the IO::Socket manpage.
IO::Socket::INET object, which is a reference to a
newly created symbol (see the Symbol package). new
optionally takes arguments, these arguments are in key-value pairs.
In addition to the key-value pairs accepted by the IO::Socket manpage,
IO::Socket::INET provides.
PeerAddr Remote host address <hostname>[:<port>]
PeerHost Synonym for PeerAddr
PeerPort Remote port or service <service>[(<no>)] | <no>
LocalAddr Local host bind address hostname[:port]
LocalHost Synonym for LocalAddr
LocalPort Local host bind port <service>[(<no>)] | <no>
Proto Protocol name (or number) "tcp" | "udp" | ...
Type Socket type SOCK_STREAM | SOCK_DGRAM | ...
Listen Queue size for listen
ReuseAddr Set SO_REUSEADDR before binding
Reuse Set SO_REUSEADDR before binding (deprecated, prefer ReuseAddr)
ReusePort Set SO_REUSEPORT before binding
Broadcast Set SO_BROADCAST before binding
Timeout Timeout value for various operations
MultiHomed Try all adresses for multi-homed hosts
Blocking Determine if connection will be blocking mode
If Listen is defined then a listen socket is created, else if the
socket type, which is derived from the protocol, is SOCK_STREAM then
connect() is called.
Although it is not illegal, the use of MultiHomed on a socket
which is in non-blocking mode is of little use. This is because the
first connect will never fail with a timeout as the connect call
will not block.
The PeerAddr can be a hostname or the IP-address on the
``xx.xx.xx.xx'' form. The PeerPort can be a number or a symbolic
service name. The service name might be followed by a number in
parenthesis which is used if the service is not known by the system.
The PeerPort specification can also be embedded in the PeerAddr
by preceding it with a ``:''.
If Proto is not given and you specify a symbolic PeerPort port,
then the constructor will try to derive Proto from the service
name. As a last resort Proto ``tcp'' is assumed. The Type
parameter will be deduced from Proto if not specified.
If the constructor is only passed a single argument, it is assumed to
be a PeerAddr specification.
If Blocking is set to 0, the connection will be in nonblocking mode.
If not specified it defaults to 1 (blocking mode).
Examples:
$sock = IO::Socket::INET->new(PeerAddr => 'www.perl.org',
PeerPort => 'http(80)',
Proto => 'tcp');
$sock = IO::Socket::INET->new(PeerAddr => 'localhost:smtp(25)');
$sock = IO::Socket::INET->new(Listen => 5,
LocalAddr => 'localhost',
LocalPort => 9000,
Proto => 'tcp');
$sock = IO::Socket::INET->new('127.0.0.1:25');
$sock = IO::Socket::INET->new(PeerPort => 9999,
PeerAddr => inet_ntoa(INADDR_BROADCAST),
Proto => udp,
LocalAddr => 'localhost',
Broadcast => 1 )
or die "Can't bind : $@\n";
NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE
As of VERSION 1.18 all IO::Socket objects have autoflush turned on by default. This was not the case with earlier releases.
NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE
the Socket manpage, the IO::Socket manpage
Graham Barr. Currently maintained by the Perl Porters. Please report all bugs to <perl5-porters@perl.org>.
Copyright (c) 1996-8 Graham Barr <gbarr@pobox.com>. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
| IO::Socket::INET - Object interface for AF_INET domain sockets |