GSP
Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Support
Contact Us
Online Help
Handbooks
Domain Status
Man Pages

FAQ
Virtual Servers
Pricing
Billing
Technical

Network
Facilities
Connectivity
Topology Map

Miscellaneous
Server Agreement
Year 2038
Credits
 

USA Flag

 

 

Man Pages


Manual Reference Pages  -  IO::SOCKET::INET (3)

.ds Aq ’

NAME

IO::Socket::INET - Object interface for AF_INET domain sockets

CONTENTS

SYNOPSIS



    use IO::Socket::INET;



DESCRIPTION

IO::Socket::INET provides an object interface to creating and using sockets in the AF_INET domain. It is built upon the IO::Socket interface and inherits all the methods defined by IO::Socket.

CONSTRUCTOR

new ( [ARGS] ) Creates an 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 IO::Socket, 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 addresses 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. If the Listen argument is given, but false, the queue size will be set to 5.

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 "Cant 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



    METHODS

sockaddr () Return the address part of the sockaddr structure for the socket
sockport () Return the port number that the socket is using on the local host
sockhost () Return the address part of the sockaddr structure for the socket in a text form xx.xx.xx.xx
peeraddr () Return the address part of the sockaddr structure for the socket on the peer host
peerport () Return the port number for the socket on the peer host.
peerhost () Return the address part of the sockaddr structure for the socket on the peer host in a text form xx.xx.xx.xx

SEE ALSO

Socket, IO::Socket

AUTHOR

Graham Barr. Currently maintained by the Perl Porters. Please report all bugs to <perlbug@perl.org>.

COPYRIGHT

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.
Search for    or go to Top of page |  Section 3 |  Main Index


perl v5.22.1 IO::SOCKET::INET (3) 2015-10-17

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with manServer 1.07.