--- name: "IO::Socket::INET6" section: "3pm" platform: "linux" package: "perl-io-socket-inet6" version: "2.73-7" release: "Arch Linux 2026-11-01" platforms: ["linux"] url: "https://new.carta.tech/IO::Socket::INET6" --- # IO::Socket::INET6(3pm) \[ DEPRECATED!! \] Object interface for AF\_INET/AF\_INET6 domain sockets ## NAME IO::Socket::INET6 - \[ DEPRECATED!! \] Object interface for AF\_INET/AF\_INET6 domain sockets ## SYNOPSIS ``` use IO::Socket::INET6; ``` ## WARNING **WARNING!! IO-Socket-INET6 is deprecated.** IO-Socket-INET6 was now succeeded by Paul Evans' IO::Socket::IP . Please convert old code from IO-Socket-INET6 to IO-Socket-IP. ## 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 [:] PeerHost Synonym for PeerAddr PeerPort Remote port or service [()] | PeerFlow Remote flow information PeerScope Remote address scope LocalAddr Local host bind address hostname[:port] LocalHost Synonym for LocalAddr LocalPort Local host bind port [()] | 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 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. 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 brackets "\[\]" 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 has priority. 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 => Socket6::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 - accept () 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 ## REPOSITORY The Subversion repository for this module carrying complete version history and other information is: \ ## SEE ALSO Socket,Socket6, IO::Socket ## AUTHOR This program is based on IO::Socket::INET by Graham Barr \ and currently maintained by the Perl Porters. Modified by Rafael Martinez Torres \ and Euro6IX project. Modified further by Shlomi Fish \, while disclaiming all copyrights. ## COPYRIGHT Copyright (c) 2003- Rafael Martinez Torres \. Copyright (c) 2003- Euro6IX project. Copyright (c) 1996-8 Graham Barr \. All rights reserved. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.