INET6(3) User Contributed Perl Documentation INET6(3)
NAME
IO::Socket::INET6 - Object interface for AF_INET|AF_INET6 domain sockets
SYNOPSIS
use IO::Socket::INET6;
DESCRIPTION
"IO::Socket::INET6" provides an object interface to creating and using sockets in either AF_INET or
AF_INET6 domains. It is built upon the IO::Socket interface and inherits all the methods defined by
IO::Socket.
CONSTRUCTOR
new ( [ARGS] )
Creates an "IO::Socket::INET6" 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::INET6" provides.
Domain Address family AF_INET | AF_INET6 | AF_UNSPEC (default)
PeerAddr Remote host address <hostname>[:<port>]
PeerHost Synonym for PeerAddr
PeerPort Remote port or service <service>[(<no>)] | <no>
PeerFlow Remote flow information
PeerScope Remote address scope
LocalAddr Local host bind address hostname[:port]
LocalHost Synonym for LocalAddr
LocalPort Local host bind port <service>[(<no>)] | <no>
LocalFlow Local host flow information
LocalScope Local host address scope
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, the IPv6-address on the "2001:800:40:2a05::10" form , or the
IPv4-address on the "213.34.234.245" 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 ":", and closing the IPv6 address on bracktes "[]" if necessary:
"124.678.12.34:23","[2a05:345f::10]:23","any.server.com:23".
If "Domain" is not given, AF_UNSPEC is assumed, that is, both AF_INET and AF_INET6 will be both
considered when resolving DNS names. AF_INET6 is prioritary. If you guess you are in trouble not
reaching the peer,(the service is not available via AF_INET6 but AF_INET) you can either try
Multihomed (try any address/family until reach) or concrete your address "family" (AF_INET,
AF_INET6).
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::INET6->new(PeerAddr => 'www.perl.org',
PeerPort => 'http(80)',
Proto => 'tcp');
Suppose either you have no IPv6 connectivity or www.perl.org has no http service on IPv6. Then,
(Trying all address/families until reach)
$sock = IO::Socket::INET6->new(PeerAddr => 'www.perl.org',
PeerPort => 'http(80)',
Multihomed => 1 ,
Proto => 'tcp');
(Concrete to IPv4 protocol)
$sock = IO::Socket::INET6->new(PeerAddr => 'www.perl.org',
PeerPort => 'http(80)',
Domain => AF_INET ,
Proto => 'tcp');
$sock = IO::Socket::INET6->new(PeerAddr => 'localhost:smtp(25)');
$sock = IO::Socket::INET6->new(Listen => 5,
LocalAddr => 'localhost',
LocalPort => 9000,
Proto => 'tcp');
$sock = IO::Socket::INET6->new('[::1]:25');
$sock = IO::Socket::INET6->new(PeerPort => 9999,
PeerAddr => inet_ntop(AF_INET6,in6addr_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
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
("2001:800:40:2a05::10" or "245.245.13.27")
sockflow ()
Return the flow information part of the sockaddr structure for the socket
sockscope ()
Return the scope identification part of the sockaddr structure for the socket
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
("2001:800:40:2a05::10" or "245.245.13.27")
peerflow ()
Return the flow information part of the sockaddr structure for the socket on the peer host
peerscope ()
Return the scope identification part of the sockaddr structure for the socket on the peer host
SEE ALSO
Socket,Socket6, IO::Socket
AUTHOR
This program is based on IO::Socket::INET by Graham Barr <gbarr@pobox.com> and currently maintained
by the Perl Porters.
Modified by Rafael Martinez Torres <rafael.martinez@novagnet.com> and Euro6IX project.
COPYRIGHT
Copyright (c) 2003- Rafael Martinez Torres <rafael.martinez@novagnet.com>.
Copyright (c) 2003- Euro6IX project.
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.
perl v5.8.8 2004-10-18 INET6(3)
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