™.. IO::Socket::INET6 - Online Linux Manual PageSection : 3
Updated : 2008-10-06
Source : perl v5.10.1
Note : User Contributed Perl Documentation
NAMEIO::Socket::INET6 − Object interface for AF_INET|AF_INET6 domain sockets
SYNOPSIS use IO::Socket::INET6;
DESCRIPTION\*(C`IO::Socket::INET6\*(C'\fR 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.
CONSTRUCTORnew ( [ARGS] ) Creates an \*(C`IO::Socket::INET6\*(C'\fR object, which is a reference to a newly created symbol (see the \*(C`Symbol\*(C'\fR package). \f(CW\*(C`new\*(C'\fR optionally takes arguments, these arguments are in key-value pairs. In addition to the key-value pairs accepted by IO::Socket, \*(C`IO::Socket::INET6\*(C'\fR 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 \*(C`Listen\*(C'\fR 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 \*(C`MultiHomed\*(C'\fR 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 \*(C`PeerAddr\*(C'\fR 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 \*(C`PeerPort\*(C'\fR 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 \*(C`PeerPort\*(C'\fR specification can also be embedded in the \f(CW\*(C`PeerAddr\*(C'\fR 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 \*(C`Domain\*(C'\fR is not given, \s-1AF_UNSPEC\s0 is assumed, that is, both \s-1AF_INET\s0 and \s-1AF_INET6\s0 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 \*(C`family\*(C'\fR (\s-1AF_INET\s0, \s-1AF_INET6\s0). If \*(C`Proto\*(C'\fR is not given and you specify a symbolic \f(CW\*(C`PeerPort\*(C'\fR port, then the constructor will try to derive \*(C`Proto\*(C'\fR from the service name. As a last resort \*(C`Proto\*(C'\fR \*(L"tcp\*(R" is assumed. The \f(CW\*(C`Type\*(C'\fR parameter will be deduced from \*(C`Proto\*(C'\fR if not specified. If the constructor is only passed a single argument, it is assumed to be a \*(C`PeerAddr\*(C'\fR specification. If \*(C`Blocking\*(C'\fR 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
METHODSaccept () See IO::Socket::INET. bind () See IO::Socket::INET. configure () This function exists in this module, but I (= Shlomi Fish) don't know what it does, or understand it. It's also not tested anywhere. I'll be happy to be enlightened. connect () See IO::Socket::INET. sockaddr () Return the address part of the sockaddr structure for the socket sockdomain() Returns the domain of the socket − AF_INET or AF_INET6 or whatever. 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
REPOSITORYThe Subversion repository for this module carrying complete version history and other information is: <http://svn.berlios.de/svnroot/repos/web−cpan/IO−Socket−INET6/>
SEE ALSOSocket,Socket6, IO::Socket
AUTHORThis 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. Modified further by Shlomi Fish <shlomif@iglu.org.il>, while disclaiming all copyrights.
COPYRIGHTCopyright (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. 0
Johanes Gumabo
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