Manual Pages for UNIX Darwin command on man IO::Socket::INET6

INET6(3) User Contributed Perl Documentation INET6(3)

NAME

IO::Socket::INET6 - Object interface for AFINET|AFINET6 domain

sockets

SYNOPSIS

use IO::Socket::INET6;

DESCRIPTION

"IO::Socket::INET6" provides an object interface to creating and using

sockets in either AFINET or AFINET6 domains. It is built upon the IO::Socket interface and inherits all the methods defined by IO::Socket. CCOONNSSTTRRUUCCTTOORR 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 AFINET | AFINET6 | AFUNSPEC (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 SOCKSTREAM | SOCKDGRAM | ... Listen Queue size for listen ReuseAddr Set SOREUSEADDR before binding Reuse Set SOREUSEADDR before binding (deprecated, prefer ReuseAddr) ReusePort Set SOREUSEPORT before binding Broadcast Set SOBROADCAST 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 SOCKSTREAM 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, AFUNSPEC is assumed, that is, both AFINET and AFINET6 will be both considered when resolving DNS names. AFINET6 is prioritary. If you guess you are in trouble not reaching the peer,(the service is not available via AFINET6 but AFINET) you can either try Multihomed (try any address/family until reach) or concrete your address "family" (AFINET, AFINET6). 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 => AFINET , 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 => inetntop(AFINET6,in6addrbroadcast), 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

MMEETTHHOODDSS 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