3 # Copyright (c) 1997-8 Graham Barr <gbarr@pobox.com>. All rights reserved.
4 # This program is free software; you can redistribute it and/or
5 # modify it under the same terms as Perl itself.
21 require IO::Socket::INET;
22 require IO::Socket::UNIX if ($^O ne 'epoc');
24 @ISA = qw(IO::Handle);
31 Exporter::export 'Socket', $callpkg, @_;
36 my $sock = $class->SUPER::new();
40 ${*$sock}{'io_socket_timeout'} = delete $arg{Timeout};
42 return scalar(%arg) ? $sock->configure(\%arg)
55 my $domain = delete $arg->{Domain};
57 croak 'IO::Socket: Cannot configure a generic socket'
58 unless defined $domain;
60 croak "IO::Socket: Unsupported socket domain"
61 unless defined $domain2pkg[$domain];
63 croak "IO::Socket: Cannot configure socket in domain '$domain'"
64 unless ref($sock) eq "IO::Socket";
66 bless($sock, $domain2pkg[$domain]);
67 $sock->configure($arg);
71 @_ == 4 or croak 'usage: $sock->socket(DOMAIN, TYPE, PROTOCOL)';
72 my($sock,$domain,$type,$protocol) = @_;
74 socket($sock,$domain,$type,$protocol) or
77 ${*$sock}{'io_socket_domain'} = $domain;
78 ${*$sock}{'io_socket_type'} = $type;
79 ${*$sock}{'io_socket_proto'} = $protocol;
85 @_ == 4 || croak 'usage: IO::Socket->socketpair(DOMAIN, TYPE, PROTOCOL)';
86 my($class,$domain,$type,$protocol) = @_;
87 my $sock1 = $class->new();
88 my $sock2 = $class->new();
90 socketpair($sock1,$sock2,$domain,$type,$protocol) or
93 ${*$sock1}{'io_socket_type'} = ${*$sock2}{'io_socket_type'} = $type;
94 ${*$sock1}{'io_socket_proto'} = ${*$sock2}{'io_socket_proto'} = $protocol;
100 @_ == 2 or croak 'usage: $sock->connect(NAME)';
103 my $timeout = ${*$sock}{'io_socket_timeout'};
106 $blocking = $sock->blocking(0) if $timeout;
108 if (!connect($sock, $addr)) {
109 if ($timeout && exists(&IO::EINPROGRESS) && ($! == &IO::EINPROGRESS)) {
112 my $sel = new IO::Select $sock;
114 if (!$sel->can_write($timeout)) {
115 $err = $! || (exists &Errno::ETIMEDOUT ? &Errno::ETIMEDOUT : 1);
116 $@ = "connect: timeout";
118 elsif(!connect($sock,$addr)) {
129 $sock->blocking(1) if $blocking;
133 $err ? undef : $sock;
137 @_ == 2 or croak 'usage: $sock->bind(NAME)';
141 return bind($sock, $addr) ? $sock
146 @_ >= 1 && @_ <= 2 or croak 'usage: $sock->listen([QUEUE])';
147 my($sock,$queue) = @_;
149 unless $queue && $queue > 0;
151 return listen($sock, $queue) ? $sock
156 @_ == 1 || @_ == 2 or croak 'usage $sock->accept([PKG])';
158 my $pkg = shift || $sock;
159 my $timeout = ${*$sock}{'io_socket_timeout'};
160 my $new = $pkg->new(Timeout => $timeout);
166 my $sel = new IO::Select $sock;
168 unless ($sel->can_read($timeout)) {
169 $@ = 'accept: timeout';
170 $! = (exists &Errno::ETIMEDOUT ? &Errno::ETIMEDOUT : 1);
175 $peer = accept($new,$sock)
178 return wantarray ? ($new, $peer)
183 @_ == 1 or croak 'usage: $sock->sockname()';
188 @_ == 1 or croak 'usage: $sock->peername()';
191 || ${*$sock}{'io_socket_peername'}
196 @_ == 1 or croak 'usage: $sock->connected()';
202 @_ >= 2 && @_ <= 4 or croak 'usage: $sock->send(BUF, [FLAGS, [TO]])';
204 my $flags = $_[2] || 0;
205 my $peer = $_[3] || $sock->peername;
207 croak 'send: Cannot determine peer address'
210 my $r = defined(getpeername($sock))
211 ? send($sock, $_[1], $flags)
212 : send($sock, $_[1], $flags, $peer);
214 # remember who we send to, if it was sucessful
215 ${*$sock}{'io_socket_peername'} = $peer
216 if(@_ == 4 && defined $r);
222 @_ == 3 || @_ == 4 or croak 'usage: $sock->recv(BUF, LEN [, FLAGS])';
225 my $flags = $_[3] || 0;
227 # remember who we recv'd from
228 ${*$sock}{'io_socket_peername'} = recv($sock, $_[1]='', $len, $flags);
232 @_ == 2 or croak 'usage: $sock->shutdown(HOW)';
233 my($sock, $how) = @_;
234 shutdown($sock, $how);
238 @_ == 4 or croak '$sock->setsockopt(LEVEL, OPTNAME)';
239 setsockopt($_[0],$_[1],$_[2],$_[3]);
242 my $intsize = length(pack("i",0));
245 @_ == 3 or croak '$sock->getsockopt(LEVEL, OPTNAME)';
246 my $r = getsockopt($_[0],$_[1],$_[2]);
249 if(defined $r && length($r) == $intsize);
255 @_ == 1 ? $sock->getsockopt(SOL_SOCKET,@_)
256 : $sock->setsockopt(SOL_SOCKET,@_);
260 @_ == 1 || @_ == 2 or croak 'usage: $sock->timeout([VALUE])';
262 my $r = ${*$sock}{'io_socket_timeout'} || undef;
264 ${*$sock}{'io_socket_timeout'} = 0 + $val
271 @_ == 1 or croak 'usage: $sock->sockdomain()';
273 ${*$sock}{'io_socket_domain'};
277 @_ == 1 or croak 'usage: $sock->socktype()';
279 ${*$sock}{'io_socket_type'}
283 @_ == 1 or croak 'usage: $sock->protocol()';
285 ${*$sock}{'io_socket_proto'};
294 IO::Socket - Object interface to socket communications
302 C<IO::Socket> provides an object interface to creating and using sockets. It
303 is built upon the L<IO::Handle> interface and inherits all the methods defined
306 C<IO::Socket> only defines methods for those operations which are common to all
307 types of socket. Operations which are specified to a socket in a particular
308 domain have methods defined in sub classes of C<IO::Socket>
310 C<IO::Socket> will export all functions (and constants) defined by L<Socket>.
318 Creates an C<IO::Socket>, which is a reference to a
319 newly created symbol (see the C<Symbol> package). C<new>
320 optionally takes arguments, these arguments are in key-value pairs.
321 C<new> only looks for one key C<Domain> which tells new which domain
322 the socket will be in. All other arguments will be passed to the
323 configuration method of the package for that domain, See below.
325 NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE
327 As of VERSION 1.18 all IO::Socket objects have autoflush turned on
328 by default. This was not the case with earlier releases.
330 NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE
336 See L<perlfunc> for complete descriptions of each of the following
337 supported C<IO::Socket> methods, which are just front ends for the
338 corresponding built-in functions:
347 peername (getpeername)
348 sockname (getsockname)
351 Some methods take slightly different arguments to those defined in L<perlfunc>
352 in attempt to make the interface more flexible. These are
358 perform the system call C<accept> on the socket and return a new object. The
359 new object will be created in the same class as the listen socket, unless
360 C<PKG> is specified. This object can be used to communicate with the client
361 that was trying to connect. In a scalar context the new socket is returned,
362 or undef upon failure. In an array context a two-element array is returned
363 containing the new socket and the peer address; the list will
364 be empty upon failure.
366 =item socketpair(DOMAIN, TYPE, PROTOCOL)
368 Call C<socketpair> and return a list of two sockets created, or an
369 empty list on failure.
373 Additional methods that are provided are:
379 Set or get the timeout value associated with this socket. If called without
380 any arguments then the current setting is returned. If called with an argument
381 the current setting is changed and the previous value returned.
383 =item sockopt(OPT [, VAL])
385 Unified method to both set and get options in the SOL_SOCKET level. If called
386 with one argument then getsockopt is called, otherwise setsockopt is called.
390 Returns the numerical number for the socket domain type. For example, for
391 a AF_INET socket the value of &AF_INET will be returned.
395 Returns the numerical number for the socket type. For example, for
396 a SOCK_STREAM socket the value of &SOCK_STREAM will be returned.
400 Returns the numerical number for the protocol being used on the socket, if
401 known. If the protocol is unknown, as with an AF_UNIX socket, zero
406 If the socket is in a connected state the the peer address is returned.
407 If the socket is not in a connected state then undef will be returned.
413 L<Socket>, L<IO::Handle>, L<IO::Socket::INET>, L<IO::Socket::UNIX>
417 Graham Barr. Currently maintained by the Perl Porters. Please report all
418 bugs to <perl5-porters@perl.org>.
422 Copyright (c) 1997-8 Graham Barr <gbarr@pobox.com>. All rights reserved.
423 This program is free software; you can redistribute it and/or
424 modify it under the same terms as Perl itself.