[p5sagit/p5-mst-13.2.git] / ext / Socket / Socket.pm

package Socket;
$VERSION = 1.5;

=head1 NAME

Socket, sockaddr_in, sockaddr_un, inet_aton, inet_ntoa - load the C socket.h defines and structure manipulators 

=head1 SYNOPSIS

    use Socket;

    $proto = getprotobyname('udp');
    socket(Socket_Handle, PF_INET, SOCK_DGRAM, $proto);
    $iaddr = gethostbyname('hishost.com');
    $port = getservbyname('time', 'udp');
    $sin = sockaddr_in($port, $iaddr);
    send(Socket_Handle, 0, 0, $sin);

    $proto = getprotobyname('tcp');
    socket(Socket_Handle, PF_INET, SOCK_STREAM, $proto);
    $port = getservbyname('smtp');
    $sin = sockaddr_in($port,inet_aton("127.1"));
    $sin = sockaddr_in(7,inet_aton("localhost"));
    $sin = sockaddr_in(7,INADDR_LOOPBACK);
    connect(Socket_Handle,$sin);

    ($port, $iaddr) = sockaddr_in(getpeername(Socket_Handle));
    $peer_host = gethostbyaddr($iaddr, AF_INET);
    $peer_addr = inet_ntoa($iaddr);

    $proto = getprotobyname('tcp');
    socket(Socket_Handle, PF_UNIX, SOCK_STREAM, $proto);
    unlink('/tmp/usock');
    $sun = sockaddr_un('/tmp/usock');
    connect(Socket_Handle,$sun);

=head1 DESCRIPTION

This module is just a translation of the C F<socket.h> file.
Unlike the old mechanism of requiring a translated F<socket.ph>
file, this uses the B<h2xs> program (see the Perl source distribution)
and your native C compiler.  This means that it has a 
far more likely chance of getting the numbers right.  This includes
all of the commonly used pound-defines like AF_INET, SOCK_STREAM, etc.

In addition, some structure manipulation functions are available:

=item inet_aton HOSTNAME

Takes a string giving the name of a host, and translates that
to the 4-byte string (structure). Takes arguments of both
the 'rtfm.mit.edu' type and '18.181.0.24'. If the host name
cannot be resolved, returns undef.

=item inet_ntoa IP_ADDRESS

Takes a four byte ip address (as returned by inet_aton())
and translates it into a string of the form 'd.d.d.d'
where the 'd's are numbers less than 256 (the normal
readable four dotted number notation for internet addresses).

=item INADDR_ANY

Note: does not return a number, but a packed string.

Returns the 4-byte wildcard ip address which specifies any
of the hosts ip addresses. (A particular machine can have
more than one ip address, each address corresponding to
a particular network interface. This wildcard address
allows you to bind to all of them simultaneously.)
Normally equivalent to inet_aton('0.0.0.0').

=item INADDR_LOOPBACK

Note - does not return a number.

Returns the 4-byte loopback address. Normally equivalent
to inet_aton('localhost').

=item INADDR_NONE

Note - does not return a number.

Returns the 4-byte invalid ip address. Normally equivalent
to inet_aton('255.255.255.255').

=item sockaddr_in PORT, ADDRESS

=item sockaddr_in SOCKADDR_IN

In an array context, unpacks its SOCKADDR_IN argument and returns an array
consisting of (PORT, ADDRESS).  In a scalar context, packs its (PORT,
ADDRESS) arguments as a SOCKADDR_IN and returns it.  If this is confusing,
use pack_sockaddr_in() and unpack_sockaddr_in() explicitly.

=item pack_sockaddr_in PORT, IP_ADDRESS

Takes two arguments, a port number and a 4 byte IP_ADDRESS (as returned by
inet_aton()). Returns the sockaddr_in structure with those arguments
packed in with AF_INET filled in.  For internet domain sockets, this
structure is normally what you need for the arguments in bind(),
connect(), and send(), and is also returned by getpeername(),
getsockname() and recv().

=item unpack_sockaddr_in SOCKADDR_IN

Takes a sockaddr_in structure (as returned by pack_sockaddr_in()) and
returns an array of two elements: the port and the 4-byte ip-address.
Will croak if the structure does not have AF_INET in the right place.

=item sockaddr_un PATHNAME

=item sockaddr_un SOCKADDR_UN

In an array context, unpacks its SOCKADDR_UN argument and returns an array
consisting of (PATHNAME).  In a scalar context, packs its PATHANE
arguments as a SOCKADDR_UN and returns it.  If this is confusing, use
pack_sockaddr_un() and unpack_sockaddr_un() explicitly.
These are only supported if your system has <sys/un.h>.

=item pack_sockaddr_un PATH

Takes one argument, a pathname. Returns the sockaddr_un structure with
that path packed in with AF_UNIX filled in. For unix domain sockets, this
structure is normally what you need for the arguments in bind(),
connect(), and send(), and is also returned by getpeername(),
getsockname() and recv().

=item unpack_sockaddr_un SOCKADDR_UN

Takes a sockaddr_un structure (as returned by pack_sockaddr_un())
and returns the pathname.  Will croak if the structure does not
have AF_UNIX in the right place.

=cut

use Carp;

require Exporter;
use AutoLoader;
require DynaLoader;
@ISA = qw(Exporter DynaLoader);
@EXPORT = qw(
	inet_aton inet_ntoa pack_sockaddr_in unpack_sockaddr_in
	pack_sockaddr_un unpack_sockaddr_un
	sockaddr_in sockaddr_un
	INADDR_ANY INADDR_LOOPBACK INADDR_NONE
	AF_802
	AF_APPLETALK
	AF_CCITT
	AF_CHAOS
	AF_DATAKIT
	AF_DECnet
	AF_DLI
	AF_ECMA
	AF_GOSIP
	AF_HYLINK
	AF_IMPLINK
	AF_INET
	AF_LAT
	AF_MAX
	AF_NBS
	AF_NIT
	AF_NS
	AF_OSI
	AF_OSINET
	AF_PUP
	AF_SNA
	AF_UNIX
	AF_UNSPEC
	AF_X25
	MSG_DONTROUTE
	MSG_MAXIOVLEN
	MSG_OOB
	MSG_PEEK
	PF_802
	PF_APPLETALK
	PF_CCITT
	PF_CHAOS
	PF_DATAKIT
	PF_DECnet
	PF_DLI
	PF_ECMA
	PF_GOSIP
	PF_HYLINK
	PF_IMPLINK
	PF_INET
	PF_LAT
	PF_MAX
	PF_NBS
	PF_NIT
	PF_NS
	PF_OSI
	PF_OSINET
	PF_PUP
	PF_SNA
	PF_UNIX
	PF_UNSPEC
	PF_X25
	SOCK_DGRAM
	SOCK_RAW
	SOCK_RDM
	SOCK_SEQPACKET
	SOCK_STREAM
	SOL_SOCKET
	SOMAXCONN
	SO_ACCEPTCONN
	SO_BROADCAST
	SO_DEBUG
	SO_DONTLINGER
	SO_DONTROUTE
	SO_ERROR
	SO_KEEPALIVE
	SO_LINGER
	SO_OOBINLINE
	SO_RCVBUF
	SO_RCVLOWAT
	SO_RCVTIMEO
	SO_REUSEADDR
	SO_SNDBUF
	SO_SNDLOWAT
	SO_SNDTIMEO
	SO_TYPE
	SO_USELOOPBACK
);

sub sockaddr_in {
    if (@_ == 6 && !wantarray) { # perl5.001m compat; use this && die
	my($af, $port, @quad) = @_;
	carp "6-ARG sockaddr_in call is deprecated" if $^W;
	pack_sockaddr_in($port, inet_aton(join('.', @quad)));
    } elsif (wantarray) {
	croak "usage:   (port,iaddr) = sockaddr_in(sin_sv)" unless @_ == 1;
        unpack_sockaddr_in(@_);
    } else {
	croak "usage:   sin_sv = sockaddr_in(port,iaddr))" unless @_ == 2;
        pack_sockaddr_in(@_);
    }
}

sub sockaddr_un {
    if (wantarray) {
	croak "usage:   (filename) = sockaddr_un(sun_sv)" unless @_ == 1;
        unpack_sockaddr_un(@_);
    } else {
	croak "usage:   sun_sv = sockaddr_un(filename)" unless @_ == 1;
        pack_sockaddr_un(@_);
    }
}


sub AUTOLOAD {
    local($constname);
    ($constname = $AUTOLOAD) =~ s/.*:://;
    $val = constant($constname, @_ ? $_[0] : 0);
    if ($! != 0) {
	if ($! =~ /Invalid/) {
	    $AutoLoader::AUTOLOAD = $AUTOLOAD;
	    goto &AutoLoader::AUTOLOAD;
	}
	else {
	    ($pack,$file,$line) = caller;
	    croak "Your vendor has not defined Socket macro $constname, used";
	}
    }
    eval "sub $AUTOLOAD { $val }";
    goto &$AUTOLOAD;
}

bootstrap Socket;

# Preloaded methods go here.  Autoload methods go after __END__, and are
# processed by the autosplit program.

1;
__END__
Commit	Line	Data
a0d0e21e	1	package Socket;
25f94b33	2	$VERSION = 1.5;
3b35bae3	3
	4	=head1 NAME
	5
cb1a09d0	6	Socket, sockaddr_in, sockaddr_un, inet_aton, inet_ntoa - load the C socket.h defines and structure manipulators
3b35bae3	7
	8	=head1 SYNOPSIS
	9
	10	use Socket;
	11
4633a7c4	12	$proto = getprotobyname('udp');
8e07c86e	13	socket(Socket_Handle, PF_INET, SOCK_DGRAM, $proto);
4633a7c4	14	$iaddr = gethostbyname('hishost.com');
	15	$port = getservbyname('time', 'udp');
	16	$sin = sockaddr_in($port, $iaddr);
	17	send(Socket_Handle, 0, 0, $sin);
	18
	19	$proto = getprotobyname('tcp');
	20	socket(Socket_Handle, PF_INET, SOCK_STREAM, $proto);
	21	$port = getservbyname('smtp');
	22	$sin = sockaddr_in($port,inet_aton("127.1"));
	23	$sin = sockaddr_in(7,inet_aton("localhost"));
	24	$sin = sockaddr_in(7,INADDR_LOOPBACK);
	25	connect(Socket_Handle,$sin);
	26
	27	($port, $iaddr) = sockaddr_in(getpeername(Socket_Handle));
	28	$peer_host = gethostbyaddr($iaddr, AF_INET);
	29	$peer_addr = inet_ntoa($iaddr);
	30
	31	$proto = getprotobyname('tcp');
	32	socket(Socket_Handle, PF_UNIX, SOCK_STREAM, $proto);
	33	unlink('/tmp/usock');
	34	$sun = sockaddr_un('/tmp/usock');
	35	connect(Socket_Handle,$sun);
3b35bae3	36
	37	=head1 DESCRIPTION
	38
	39	This module is just a translation of the C F<socket.h> file.
	40	Unlike the old mechanism of requiring a translated F<socket.ph>
	41	file, this uses the B<h2xs> program (see the Perl source distribution)
	42	and your native C compiler. This means that it has a
4633a7c4	43	far more likely chance of getting the numbers right. This includes
4633a7c4	44	all of the commonly used pound-defines like AF_INET, SOCK_STREAM, etc.
3b35bae3	45
8e07c86e	46	In addition, some structure manipulation functions are available:
	47
	48	=item inet_aton HOSTNAME
	49
	50	Takes a string giving the name of a host, and translates that
	51	to the 4-byte string (structure). Takes arguments of both
	52	the 'rtfm.mit.edu' type and '18.181.0.24'. If the host name
	53	cannot be resolved, returns undef.
	54
	55	=item inet_ntoa IP_ADDRESS
	56
	57	Takes a four byte ip address (as returned by inet_aton())
	58	and translates it into a string of the form 'd.d.d.d'
	59	where the 'd's are numbers less than 256 (the normal
	60	readable four dotted number notation for internet addresses).
	61
	62	=item INADDR_ANY
	63
4633a7c4	64	Note: does not return a number, but a packed string.
8e07c86e	65
	66	Returns the 4-byte wildcard ip address which specifies any
	67	of the hosts ip addresses. (A particular machine can have
	68	more than one ip address, each address corresponding to
	69	a particular network interface. This wildcard address
	70	allows you to bind to all of them simultaneously.)
	71	Normally equivalent to inet_aton('0.0.0.0').
	72
	73	=item INADDR_LOOPBACK
	74
	75	Note - does not return a number.
	76
	77	Returns the 4-byte loopback address. Normally equivalent
	78	to inet_aton('localhost').
3b35bae3	79
8e07c86e	80	=item INADDR_NONE
	81
	82	Note - does not return a number.
	83
	84	Returns the 4-byte invalid ip address. Normally equivalent
	85	to inet_aton('255.255.255.255').
	86
4633a7c4	87	=item sockaddr_in PORT, ADDRESS
	88
	89	=item sockaddr_in SOCKADDR_IN
	90
	91	In an array context, unpacks its SOCKADDR_IN argument and returns an array
	92	consisting of (PORT, ADDRESS). In a scalar context, packs its (PORT,
	93	ADDRESS) arguments as a SOCKADDR_IN and returns it. If this is confusing,
	94	use pack_sockaddr_in() and unpack_sockaddr_in() explicitly.
	95
	96	=item pack_sockaddr_in PORT, IP_ADDRESS
8e07c86e	97
4633a7c4	98	Takes two arguments, a port number and a 4 byte IP_ADDRESS (as returned by
	99	inet_aton()). Returns the sockaddr_in structure with those arguments
	100	packed in with AF_INET filled in. For internet domain sockets, this
	101	structure is normally what you need for the arguments in bind(),
	102	connect(), and send(), and is also returned by getpeername(),
	103	getsockname() and recv().
8e07c86e	104
	105	=item unpack_sockaddr_in SOCKADDR_IN
	106
4633a7c4	107	Takes a sockaddr_in structure (as returned by pack_sockaddr_in()) and
	108	returns an array of two elements: the port and the 4-byte ip-address.
	109	Will croak if the structure does not have AF_INET in the right place.
	110
	111	=item sockaddr_un PATHNAME
	112
	113	=item sockaddr_un SOCKADDR_UN
	114
	115	In an array context, unpacks its SOCKADDR_UN argument and returns an array
	116	consisting of (PATHNAME). In a scalar context, packs its PATHANE
	117	arguments as a SOCKADDR_UN and returns it. If this is confusing, use
	118	pack_sockaddr_un() and unpack_sockaddr_un() explicitly.
25f94b33	119	These are only supported if your system has <sys/un.h>.
4633a7c4	120
	121	=item pack_sockaddr_un PATH
	122
	123	Takes one argument, a pathname. Returns the sockaddr_un structure with
	124	that path packed in with AF_UNIX filled in. For unix domain sockets, this
	125	structure is normally what you need for the arguments in bind(),
	126	connect(), and send(), and is also returned by getpeername(),
	127	getsockname() and recv().
	128
	129	=item unpack_sockaddr_un SOCKADDR_UN
	130
	131	Takes a sockaddr_un structure (as returned by pack_sockaddr_un())
	132	and returns the pathname. Will croak if the structure does not
	133	have AF_UNIX in the right place.
3b35bae3	134
	135	=cut
	136
a0d0e21e	137	use Carp;
	138
	139	require Exporter;
3b35bae3	140	use AutoLoader;
a0d0e21e	141	require DynaLoader;
fec02dd3	142	@ISA = qw(Exporter DynaLoader);
a0d0e21e	143	@EXPORT = qw(
8e07c86e	144	inet_aton inet_ntoa pack_sockaddr_in unpack_sockaddr_in
4633a7c4	145	pack_sockaddr_un unpack_sockaddr_un
4633a7c4	146	sockaddr_in sockaddr_un
8e07c86e	147	INADDR_ANY INADDR_LOOPBACK INADDR_NONE
a0d0e21e	148	AF_802
	149	AF_APPLETALK
	150	AF_CCITT
	151	AF_CHAOS
	152	AF_DATAKIT
	153	AF_DECnet
	154	AF_DLI
	155	AF_ECMA
	156	AF_GOSIP
	157	AF_HYLINK
	158	AF_IMPLINK
	159	AF_INET
	160	AF_LAT
	161	AF_MAX
	162	AF_NBS
	163	AF_NIT
	164	AF_NS
	165	AF_OSI
	166	AF_OSINET
	167	AF_PUP
	168	AF_SNA
	169	AF_UNIX
	170	AF_UNSPEC
	171	AF_X25
	172	MSG_DONTROUTE
	173	MSG_MAXIOVLEN
	174	MSG_OOB
	175	MSG_PEEK
	176	PF_802
	177	PF_APPLETALK
	178	PF_CCITT
	179	PF_CHAOS
	180	PF_DATAKIT
	181	PF_DECnet
	182	PF_DLI
	183	PF_ECMA
	184	PF_GOSIP
	185	PF_HYLINK
	186	PF_IMPLINK
	187	PF_INET
	188	PF_LAT
	189	PF_MAX
	190	PF_NBS
	191	PF_NIT
	192	PF_NS
	193	PF_OSI
	194	PF_OSINET
	195	PF_PUP
	196	PF_SNA
	197	PF_UNIX
	198	PF_UNSPEC
	199	PF_X25
	200	SOCK_DGRAM
	201	SOCK_RAW
	202	SOCK_RDM
	203	SOCK_SEQPACKET
	204	SOCK_STREAM
	205	SOL_SOCKET
	206	SOMAXCONN
	207	SO_ACCEPTCONN
	208	SO_BROADCAST
	209	SO_DEBUG
	210	SO_DONTLINGER
	211	SO_DONTROUTE
212	SO_ERROR
213	SO_KEEPALIVE
214	SO_LINGER
215	SO_OOBINLINE
216	SO_RCVBUF
217	SO_RCVLOWAT
218	SO_RCVTIMEO
219	SO_REUSEADDR
220	SO_SNDBUF
221	SO_SNDLOWAT
222	SO_SNDTIMEO
223	SO_TYPE
224	SO_USELOOPBACK
225	);
226
4633a7c4	227	sub sockaddr_in {
	228	if (@_ == 6 && !wantarray) { # perl5.001m compat; use this && die
	229	my($af, $port, @quad) = @_;
	230	carp "6-ARG sockaddr_in call is deprecated" if $^W;
	231	pack_sockaddr_in($port, inet_aton(join('.', @quad)));
	232	} elsif (wantarray) {
	233	croak "usage: (port,iaddr) = sockaddr_in(sin_sv)" unless @_ == 1;
	234	unpack_sockaddr_in(@_);
	235	} else {
	236	croak "usage: sin_sv = sockaddr_in(port,iaddr))" unless @_ == 2;
	237	pack_sockaddr_in(@_);
	238	}
	239	}
	240
	241	sub sockaddr_un {
	242	if (wantarray) {
	243	croak "usage: (filename) = sockaddr_un(sun_sv)" unless @_ == 1;
	244	unpack_sockaddr_un(@_);
	245	} else {
37120919	246	croak "usage: sun_sv = sockaddr_un(filename)" unless @_ == 1;
37120919	247	pack_sockaddr_un(@_);
4633a7c4	248	}
	249	}
	250
	251
a0d0e21e	252	sub AUTOLOAD {
a0d0e21e	253	local($constname);
	254	($constname = $AUTOLOAD) =~ s/.*:://;
	255	$val = constant($constname, @_ ? $_[0] : 0);
	256	if ($! != 0) {
	257	if ($! =~ /Invalid/) {
	258	$AutoLoader::AUTOLOAD = $AUTOLOAD;
	259	goto &AutoLoader::AUTOLOAD;
	260	}
	261	else {
	262	($pack,$file,$line) = caller;
	263	croak "Your vendor has not defined Socket macro $constname, used";
	264	}
	265	}
	266	eval "sub $AUTOLOAD { $val }";
	267	goto &$AUTOLOAD;
	268	}
	269
	270	bootstrap Socket;
	271
	272	# Preloaded methods go here. Autoload methods go after __END__, and are
	273	# processed by the autosplit program.
	274
	275	1;
	276	__END__