1IO::Socket::INET6(3)  User Contributed Perl Documentation IO::Socket::INET6(3)
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NAME

6       IO::Socket::INET6 - Object interface for AF_INET/AF_INET6 domain
7       sockets
8

SYNOPSIS

10           use IO::Socket::INET6;
11

DESCRIPTION

13       "IO::Socket::INET6" provides an object interface to creating and using
14       sockets in either AF_INET or AF_INET6 domains. It is built upon the
15       IO::Socket interface and inherits all the methods defined by
16       IO::Socket.
17

CONSTRUCTOR

19       new ( [ARGS] )
20           Creates an "IO::Socket::INET6" object, which is a reference to a
21           newly created symbol (see the "Symbol" package). "new" optionally
22           takes arguments, these arguments are in key-value pairs.
23
24           In addition to the key-value pairs accepted by IO::Socket,
25           "IO::Socket::INET6" provides.
26
27               Domain      Address family               AF_INET | AF_INET6 | AF_UNSPEC (default)
28               PeerAddr    Remote host address          <hostname>[:<port>]
29               PeerHost    Synonym for PeerAddr
30               PeerPort    Remote port or service       <service>[(<no>)] | <no>
31               PeerFlow    Remote flow information
32               PeerScope   Remote address scope
33               LocalAddr   Local host bind address      hostname[:port]
34               LocalHost   Synonym for LocalAddr
35               LocalPort   Local host bind port         <service>[(<no>)] | <no>
36               LocalFlow   Local host flow information
37               LocalScope  Local host address scope
38               Proto       Protocol name (or number)    "tcp" | "udp" | ...
39               Type        Socket type                  SOCK_STREAM | SOCK_DGRAM | ...
40               Listen      Queue size for listen
41               ReuseAddr   Set SO_REUSEADDR before binding
42               Reuse       Set SO_REUSEADDR before binding (deprecated, prefer ReuseAddr)
43               ReusePort   Set SO_REUSEPORT before binding
44               Broadcast   Set SO_BROADCAST before binding
45               Timeout     Timeout value for various operations
46               MultiHomed  Try all addresses for multi-homed hosts
47               Blocking    Determine if connection will be blocking mode
48
49           If "Listen" is defined then a listen socket is created, else if the
50           socket type, which is derived from the protocol, is SOCK_STREAM
51           then connect() is called.
52
53           Although it is not illegal, the use of "MultiHomed" on a socket
54           which is in non-blocking mode is of little use. This is because the
55           first connect will never fail with a timeout as the connect call
56           will not block.
57
58           The "PeerAddr" can be a hostname,  the IPv6-address on the
59           "2001:800:40:2a05::10" form , or the IPv4-address on the
60           "213.34.234.245" form.  The "PeerPort" can be a number or a
61           symbolic service name.  The service name might be followed by a
62           number in parenthesis which is used if the service is not known by
63           the system.  The "PeerPort" specification can also be embedded in
64           the "PeerAddr" by preceding it with a ":", and closing the IPv6
65           address on brackets "[]" if necessary:
66           "124.678.12.34:23","[2a05:345f::10]:23","any.server.com:23".
67
68           If "Domain" is not given, AF_UNSPEC is assumed, that is, both
69           AF_INET and AF_INET6 will be both considered when resolving DNS
70           names. AF_INET6 has priority.  If you guess you are in trouble not
71           reaching the peer,(the service is not available via AF_INET6 but
72           AF_INET) you can either try Multihomed (try any address/family
73           until reach) or concrete your address "family" (AF_INET, AF_INET6).
74
75           If "Proto" is not given and you specify a symbolic "PeerPort" port,
76           then the constructor will try to derive "Proto" from the service
77           name.  As a last resort "Proto" "tcp" is assumed.  The "Type"
78           parameter will be deduced from "Proto" if not specified.
79
80           If the constructor is only passed a single argument, it is assumed
81           to be a "PeerAddr" specification.
82
83           If "Blocking" is set to 0, the connection will be in nonblocking
84           mode.  If not specified it defaults to 1 (blocking mode).
85
86           Examples:
87
88              $sock = IO::Socket::INET6->new(PeerAddr => 'www.perl.org',
89                                            PeerPort => 'http(80)',
90                                            Proto    => 'tcp');
91
92           Suppose either you have no IPv6 connectivity or www.perl.org has no
93           http service on IPv6. Then,
94
95           (Trying all address/families until reach)
96
97              $sock = IO::Socket::INET6->new(PeerAddr => 'www.perl.org',
98                                            PeerPort => 'http(80)',
99                                            Multihomed => 1 ,
100                                            Proto    => 'tcp');
101
102           (Concrete to IPv4 protocol)
103
104              $sock = IO::Socket::INET6->new(PeerAddr => 'www.perl.org',
105                                            PeerPort => 'http(80)',
106                                            Domain => AF_INET ,
107                                            Proto    => 'tcp');
108
109
110              $sock = IO::Socket::INET6->new(PeerAddr => 'localhost:smtp(25)');
111
112              $sock = IO::Socket::INET6->new(Listen    => 5,
113                                            LocalAddr => 'localhost',
114                                            LocalPort => 9000,
115                                            Proto     => 'tcp');
116
117              $sock = IO::Socket::INET6->new('[::1]:25');
118
119              $sock = IO::Socket::INET6->new(PeerPort  => 9999,
120                                            PeerAddr  => Socket6::inet_ntop(AF_INET6,in6addr_broadcast),
121                                            Proto     => udp,
122                                            LocalAddr => 'localhost',
123                                            Broadcast => 1 )
124                                        or die "Can't bind : $@\n";
125
126            NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE
127
128           As of VERSION 1.18 all IO::Socket objects have autoflush turned on
129           by default. This was not the case with earlier releases.
130
131            NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE
132
133   METHODS
134       accept ()
135           See IO::Socket::INET.
136
137       bind ()
138           See IO::Socket::INET.
139
140       configure ()
141           This function exists in this module, but I (= Shlomi Fish) don't
142           know what it does, or understand it. It's also not tested anywhere.
143           I'll be happy to be enlightened.
144
145       connect ()
146           See IO::Socket::INET.
147
148       sockaddr ()
149           Return the address part of the sockaddr structure for the socket
150
151       sockdomain()
152           Returns the domain of the socket - AF_INET or AF_INET6 or whatever.
153
154       sockport ()
155           Return the port number that the socket is using on the local host
156
157       sockhost ()
158           Return the address part of the sockaddr structure for the socket in
159           a text form ("2001:800:40:2a05::10" or "245.245.13.27")
160
161       sockflow ()
162           Return the flow information part of the sockaddr structure for the
163           socket
164
165       sockscope ()
166           Return the scope identification part of the sockaddr structure for
167           the socket
168
169       peeraddr ()
170           Return the address part of the sockaddr structure for the socket on
171           the peer host
172
173       peerport ()
174           Return the port number for the socket on the peer host.
175
176       peerhost ()
177           Return the address part of the sockaddr structure for the socket on
178           the peer host in a text form ("2001:800:40:2a05::10" or
179           "245.245.13.27")
180
181       peerflow ()
182           Return the flow information part of the sockaddr structure for the
183           socket on the peer host
184
185       peerscope ()
186           Return the scope identification part of the sockaddr structure for
187           the socket on the peer host
188

REPOSITORY

190       The Subversion repository for this module carrying complete version
191       history and other information is:
192
193       <http://svn.berlios.de/svnroot/repos/web-cpan/IO-Socket-INET6/>
194

SEE ALSO

196       Socket,Socket6, IO::Socket
197

AUTHOR

199       This program is based on IO::Socket::INET by Graham Barr
200       <gbarr@pobox.com> and currently maintained by the Perl Porters.
201
202       Modified by Rafael Martinez Torres <rafael.martinez@novagnet.com> and
203       Euro6IX project.
204
205       Modified further by Shlomi Fish <shlomif@iglu.org.il>, while
206       disclaiming all copyrights.
207
209       Copyright (c) 2003- Rafael Martinez Torres
210       <rafael.martinez@novagnet.com>.
211
212       Copyright (c) 2003- Euro6IX project.
213
214       Copyright (c) 1996-8 Graham Barr <gbarr@pobox.com>.
215
216       All rights reserved.
217
218       This program is free software; you can redistribute it and/or modify it
219       under the same terms as Perl itself.
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223perl v5.34.0                      2021-07-22              IO::Socket::INET6(3)
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