[ViewVC] Diff of: cvs/AnyEvent/lib/AnyEvent/Handle.pm

Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.118 by root, Thu Feb 12 17:33:38 2009 UTC vs.
Revision 1.151 by root, Thu Jul 16 04:20:23 2009 UTC

…		…
14		14
15	AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent	15	AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent
16		16
17	=cut	17	=cut
18		18
19	our $VERSION = 4.34;	19	our $VERSION = 4.82;
20		20
21	=head1 SYNOPSIS	21	=head1 SYNOPSIS
22		22
23	use AnyEvent;	23	use AnyEvent;
24	use AnyEvent::Handle;	24	use AnyEvent::Handle;
25		25
26	my $cv = AnyEvent->condvar;	26	my $cv = AnyEvent->condvar;
27		27
28	my $handle =	28	my $hdl; $hdl = new AnyEvent::Handle
29	AnyEvent::Handle->new (
30	fh => \*STDIN,	29	fh => \*STDIN,
31	on_eof => sub {	30	on_error => sub {
		31	my ($hdl, $fatal, $msg) = @_;
		32	warn "got error $msg\n";
		33	$hdl->destroy;
32	$cv->send;	34	$cv->send;
33	},
34	);	35	);
35		36
36	# send some request line	37	# send some request line
37	$handle->push_write ("getinfo\015\012");	38	$hdl->push_write ("getinfo\015\012");
38		39
39	# read the response line	40	# read the response line
40	$handle->push_read (line => sub {	41	$hdl->push_read (line => sub {
41	my ($handle, $line) = @_;	42	my ($hdl, $line) = @_;
42	warn "read line <$line>\n";	43	warn "got line <$line>\n";
43	$cv->send;	44	$cv->send;
44	});	45	});
45		46
46	$cv->recv;	47	$cv->recv;
47		48
…		…
63		64
64	=head1 METHODS	65	=head1 METHODS
65		66
66	=over 4	67	=over 4
67		68
68	=item B<new (%args)>	69	=item $handle = B<new> AnyEvent::TLS fh => $filehandle, key => value...
69		70
70	The constructor supports these arguments (all as key => value pairs).	71	The constructor supports these arguments (all as C<< key => value >> pairs).
71		72
72	=over 4	73	=over 4
73		74
74	=item fh => $filehandle [MANDATORY]	75	=item fh => $filehandle [MANDATORY]
75		76
…		…
81		82
82	=item on_eof => $cb->($handle)	83	=item on_eof => $cb->($handle)
83		84
84	Set the callback to be called when an end-of-file condition is detected,	85	Set the callback to be called when an end-of-file condition is detected,
85	i.e. in the case of a socket, when the other side has closed the	86	i.e. in the case of a socket, when the other side has closed the
86	connection cleanly.	87	connection cleanly, and there are no outstanding read requests in the
		88	queue (if there are read requests, then an EOF counts as an unexpected
		89	connection close and will be flagged as an error).
87		90
88	For sockets, this just means that the other side has stopped sending data,	91	For sockets, this just means that the other side has stopped sending data,
89	you can still try to write data, and, in fact, one can return from the EOF	92	you can still try to write data, and, in fact, one can return from the EOF
90	callback and continue writing data, as only the read part has been shut	93	callback and continue writing data, as only the read part has been shut
91	down.	94	down.
92		95
93	While not mandatory, it is I<highly> recommended to set an EOF callback,
94	otherwise you might end up with a closed socket while you are still
95	waiting for data.
96
97	If an EOF condition has been detected but no C<on_eof> callback has been	96	If an EOF condition has been detected but no C<on_eof> callback has been
98	set, then a fatal error will be raised with C<$!> set to <0>.	97	set, then a fatal error will be raised with C<$!> set to <0>.
99		98
100	=item on_error => $cb->($handle, $fatal)	99	=item on_error => $cb->($handle, $fatal, $message)
101		100
102	This is the error callback, which is called when, well, some error	101	This is the error callback, which is called when, well, some error
103	occured, such as not being able to resolve the hostname, failure to	102	occured, such as not being able to resolve the hostname, failure to
104	connect or a read error.	103	connect or a read error.
105		104
106	Some errors are fatal (which is indicated by C<$fatal> being true). On	105	Some errors are fatal (which is indicated by C<$fatal> being true). On
107	fatal errors the handle object will be shut down and will not be usable	106	fatal errors the handle object will be destroyed (by a call to C<< ->
108	(but you are free to look at the current C<< ->rbuf >>). Examples of fatal	107	destroy >>) after invoking the error callback (which means you are free to
109	errors are an EOF condition with active (but unsatisifable) read watchers	108	examine the handle object). Examples of fatal errors are an EOF condition
110	(C<EPIPE>) or I/O errors.	109	with active (but unsatisifable) read watchers (C<EPIPE>) or I/O errors.
		110
		111	AnyEvent::Handle tries to find an appropriate error code for you to check
		112	against, but in some cases (TLS errors), this does not work well. It is
		113	recommended to always output the C<$message> argument in human-readable
		114	error messages (it's usually the same as C<"$!">).
111		115
112	Non-fatal errors can be retried by simply returning, but it is recommended	116	Non-fatal errors can be retried by simply returning, but it is recommended
113	to simply ignore this parameter and instead abondon the handle object	117	to simply ignore this parameter and instead abondon the handle object
114	when this callback is invoked. Examples of non-fatal errors are timeouts	118	when this callback is invoked. Examples of non-fatal errors are timeouts
115	C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>).	119	C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>).
116		120
117	On callback entrance, the value of C<$!> contains the operating system	121	On callback entrance, the value of C<$!> contains the operating system
118	error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>).	122	error code (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT>, C<EBADMSG> or
		123	C<EPROTO>).
119		124
120	While not mandatory, it is I<highly> recommended to set this callback, as	125	While not mandatory, it is I<highly> recommended to set this callback, as
121	you will not be notified of errors otherwise. The default simply calls	126	you will not be notified of errors otherwise. The default simply calls
122	C<croak>.	127	C<croak>.
123		128
…		…
127	and no read request is in the queue (unlike read queue callbacks, this	132	and no read request is in the queue (unlike read queue callbacks, this
128	callback will only be called when at least one octet of data is in the	133	callback will only be called when at least one octet of data is in the
129	read buffer).	134	read buffer).
130		135
131	To access (and remove data from) the read buffer, use the C<< ->rbuf >>	136	To access (and remove data from) the read buffer, use the C<< ->rbuf >>
132	method or access the C<$handle->{rbuf}> member directly. Note that you	137	method or access the C<< $handle->{rbuf} >> member directly. Note that you
133	must not enlarge or modify the read buffer, you can only remove data at	138	must not enlarge or modify the read buffer, you can only remove data at
134	the beginning from it.	139	the beginning from it.
135		140
136	When an EOF condition is detected then AnyEvent::Handle will first try to	141	When an EOF condition is detected then AnyEvent::Handle will first try to
137	feed all the remaining data to the queued callbacks and C<on_read> before	142	feed all the remaining data to the queued callbacks and C<on_read> before
138	calling the C<on_eof> callback. If no progress can be made, then a fatal	143	calling the C<on_eof> callback. If no progress can be made, then a fatal
139	error will be raised (with C<$!> set to C<EPIPE>).	144	error will be raised (with C<$!> set to C<EPIPE>).
		145
		146	Note that, unlike requests in the read queue, an C<on_read> callback
		147	doesn't mean you I<require> some data: if there is an EOF and there
		148	are outstanding read requests then an error will be flagged. With an
		149	C<on_read> callback, the C<on_eof> callback will be invoked.
140		150
141	=item on_drain => $cb->($handle)	151	=item on_drain => $cb->($handle)
142		152
143	This sets the callback that is called when the write buffer becomes empty	153	This sets the callback that is called when the write buffer becomes empty
144	(or when the callback is set and the buffer is empty already).	154	(or when the callback is set and the buffer is empty already).
…		…
237		247
238	This will not work for partial TLS data that could not be encoded	248	This will not work for partial TLS data that could not be encoded
239	yet. This data will be lost. Calling the C<stoptls> method in time might	249	yet. This data will be lost. Calling the C<stoptls> method in time might
240	help.	250	help.
241		251
		252	=item peername => $string
		253
		254	A string used to identify the remote site - usually the DNS hostname
		255	(I<not> IDN!) used to create the connection, rarely the IP address.
		256
		257	Apart from being useful in error messages, this string is also used in TLS
		258	peername verification (see C<verify_peername> in L<AnyEvent::TLS>). This
		259	verification will be skipped when C<peername> is not specified or
		260	C<undef>.
		261
242	=item tls => "accept" \| "connect" \| Net::SSLeay::SSL object	262	=item tls => "accept" \| "connect" \| Net::SSLeay::SSL object
243		263
244	When this parameter is given, it enables TLS (SSL) mode, that means	264	When this parameter is given, it enables TLS (SSL) mode, that means
245	AnyEvent will start a TLS handshake as soon as the conenction has been	265	AnyEvent will start a TLS handshake as soon as the conenction has been
246	established and will transparently encrypt/decrypt data afterwards.	266	established and will transparently encrypt/decrypt data afterwards.
		267
		268	All TLS protocol errors will be signalled as C<EPROTO>, with an
		269	appropriate error message.
247		270
248	TLS mode requires Net::SSLeay to be installed (it will be loaded	271	TLS mode requires Net::SSLeay to be installed (it will be loaded
249	automatically when you try to create a TLS handle): this module doesn't	272	automatically when you try to create a TLS handle): this module doesn't
250	have a dependency on that module, so if your module requires it, you have	273	have a dependency on that module, so if your module requires it, you have
251	to add the dependency yourself.	274	to add the dependency yourself.
…		…
255	mode.	278	mode.
256		279
257	You can also provide your own TLS connection object, but you have	280	You can also provide your own TLS connection object, but you have
258	to make sure that you call either C<Net::SSLeay::set_connect_state>	281	to make sure that you call either C<Net::SSLeay::set_connect_state>
259	or C<Net::SSLeay::set_accept_state> on it before you pass it to	282	or C<Net::SSLeay::set_accept_state> on it before you pass it to
260	AnyEvent::Handle.	283	AnyEvent::Handle. Also, this module will take ownership of this connection
		284	object.
		285
		286	At some future point, AnyEvent::Handle might switch to another TLS
		287	implementation, then the option to use your own session object will go
		288	away.
261		289
262	B<IMPORTANT:> since Net::SSLeay "objects" are really only integers,	290	B<IMPORTANT:> since Net::SSLeay "objects" are really only integers,
263	passing in the wrong integer will lead to certain crash. This most often	291	passing in the wrong integer will lead to certain crash. This most often
264	happens when one uses a stylish C<< tls => 1 >> and is surprised about the	292	happens when one uses a stylish C<< tls => 1 >> and is surprised about the
265	segmentation fault.	293	segmentation fault.
266		294
267	See the C<< ->starttls >> method for when need to start TLS negotiation later.	295	See the C<< ->starttls >> method for when need to start TLS negotiation later.
268		296
269	=item tls_ctx => $ssl_ctx	297	=item tls_ctx => $anyevent_tls
270		298
271	Use the given C<Net::SSLeay::CTX> object to create the new TLS connection	299	Use the given C<AnyEvent::TLS> object to create the new TLS connection
272	(unless a connection object was specified directly). If this parameter is	300	(unless a connection object was specified directly). If this parameter is
273	missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>.	301	missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>.
		302
		303	Instead of an object, you can also specify a hash reference with C<< key
		304	=> value >> pairs. Those will be passed to L<AnyEvent::TLS> to create a
		305	new TLS context object.
		306
		307	=item on_starttls => $cb->($handle, $success[, $error_message])
		308
		309	This callback will be invoked when the TLS/SSL handshake has finished. If
		310	C<$success> is true, then the TLS handshake succeeded, otherwise it failed
		311	(C<on_stoptls> will not be called in this case).
		312
		313	The session in C<< $handle->{tls} >> can still be examined in this
		314	callback, even when the handshake was not successful.
		315
		316	TLS handshake failures will not cause C<on_error> to be invoked when this
		317	callback is in effect, instead, the error message will be passed to C<on_starttls>.
		318
		319	Without this callback, handshake failures lead to C<on_error> being
		320	called, as normal.
		321
		322	Note that you cannot call C<starttls> right again in this callback. If you
		323	need to do that, start an zero-second timer instead whose callback can
		324	then call C<< ->starttls >> again.
		325
		326	=item on_stoptls => $cb->($handle)
		327
		328	When a SSLv3/TLS shutdown/close notify/EOF is detected and this callback is
		329	set, then it will be invoked after freeing the TLS session. If it is not,
		330	then a TLS shutdown condition will be treated like a normal EOF condition
		331	on the handle.
		332
		333	The session in C<< $handle->{tls} >> can still be examined in this
		334	callback.
		335
		336	This callback will only be called on TLS shutdowns, not when the
		337	underlying handle signals EOF.
274		338
275	=item json => JSON or JSON::XS object	339	=item json => JSON or JSON::XS object
276		340
277	This is the json coder object used by the C<json> read and write types.	341	This is the json coder object used by the C<json> read and write types.
278		342
…		…
287		351
288	=cut	352	=cut
289		353
290	sub new {	354	sub new {
291	my $class = shift;	355	my $class = shift;
292
293	my $self = bless { @_ }, $class;	356	my $self = bless { @_ }, $class;
294		357
295	$self->{fh} or Carp::croak "mandatory argument fh is missing";	358	$self->{fh} or Carp::croak "mandatory argument fh is missing";
296		359
297	AnyEvent::Util::fh_nonblocking $self->{fh}, 1;	360	AnyEvent::Util::fh_nonblocking $self->{fh}, 1;
		361
		362	$self->{_activity} = AnyEvent->now;
		363	$self->_timeout;
		364
		365	$self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay};
298		366
299	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx})	367	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx})
300	if $self->{tls};	368	if $self->{tls};
301		369
302	$self->{_activity} = AnyEvent->now;
303	$self->_timeout;
304
305	$self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain};	370	$self->on_drain (delete $self->{on_drain}) if $self->{on_drain};
306	$self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay};
307		371
308	$self->start_read	372	$self->start_read
309	if $self->{on_read};	373	if $self->{on_read};
310		374
311	$self	375	$self->{fh} && $self
312	}	376	}
313		377
314	sub _shutdown {	378	#sub _shutdown {
315	my ($self) = @_;	379	# my ($self) = @_;
316		380	#
317	delete $self->{_tw};	381	# delete @$self{qw(_tw _rw _ww fh wbuf on_read _queue)};
318	delete $self->{_rw};	382	# $self->{_eof} = 1; # tell starttls et. al to stop trying
319	delete $self->{_ww};	383	#
320	delete $self->{fh};
321
322	&_freetls;	384	# &_freetls;
323		385	#}
324	delete $self->{on_read};
325	delete $self->{_queue};
326	}
327		386
328	sub _error {	387	sub _error {
329	my ($self, $errno, $fatal) = @_;	388	my ($self, $errno, $fatal, $message) = @_;
330
331	$self->_shutdown
332	if $fatal;
333		389
334	$! = $errno;	390	$! = $errno;
		391	$message \|\|= "$!";
335		392
336	if ($self->{on_error}) {	393	if ($self->{on_error}) {
337	$self->{on_error}($self, $fatal);	394	$self->{on_error}($self, $fatal, $message);
		395	$self->destroy if $fatal;
338	} elsif ($self->{fh}) {	396	} elsif ($self->{fh}) {
		397	$self->destroy;
339	Carp::croak "AnyEvent::Handle uncaught error: $!";	398	Carp::croak "AnyEvent::Handle uncaught error: $message";
340	}	399	}
341	}	400	}
342		401
343	=item $fh = $handle->fh	402	=item $fh = $handle->fh
344		403
…		…
405	local $SIG{__DIE__};	464	local $SIG{__DIE__};
406	setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1];	465	setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1];
407	};	466	};
408	}	467	}
409		468
		469	=item $handle->on_starttls ($cb)
		470
		471	Replace the current C<on_starttls> callback (see the C<on_starttls> constructor argument).
		472
		473	=cut
		474
		475	sub on_starttls {
		476	$_[0]{on_starttls} = $_[1];
		477	}
		478
		479	=item $handle->on_stoptls ($cb)
		480
		481	Replace the current C<on_stoptls> callback (see the C<on_stoptls> constructor argument).
		482
		483	=cut
		484
		485	sub on_starttls {
		486	$_[0]{on_stoptls} = $_[1];
		487	}
		488
410	#############################################################################	489	#############################################################################
411		490
412	=item $handle->timeout ($seconds)	491	=item $handle->timeout ($seconds)
413		492
414	Configures (or disables) the inactivity timeout.	493	Configures (or disables) the inactivity timeout.
…		…
438	$self->{_activity} = $NOW;	517	$self->{_activity} = $NOW;
439		518
440	if ($self->{on_timeout}) {	519	if ($self->{on_timeout}) {
441	$self->{on_timeout}($self);	520	$self->{on_timeout}($self);
442	} else {	521	} else {
443	$self->_error (&Errno::ETIMEDOUT);	522	$self->_error (Errno::ETIMEDOUT);
444	}	523	}
445		524
446	# callback could have changed timeout value, optimise	525	# callback could have changed timeout value, optimise
447	return unless $self->{timeout};	526	return unless $self->{timeout};
448		527
…		…
511	Scalar::Util::weaken $self;	590	Scalar::Util::weaken $self;
512		591
513	my $cb = sub {	592	my $cb = sub {
514	my $len = syswrite $self->{fh}, $self->{wbuf};	593	my $len = syswrite $self->{fh}, $self->{wbuf};
515		594
516	if ($len >= 0) {	595	if (defined $len) {
517	substr $self->{wbuf}, 0, $len, "";	596	substr $self->{wbuf}, 0, $len, "";
518		597
519	$self->{_activity} = AnyEvent->now;	598	$self->{_activity} = AnyEvent->now;
520		599
521	$self->{on_drain}($self)	600	$self->{on_drain}($self)
…		…
656		735
657	pack "w/a*", Storable::nfreeze ($ref)	736	pack "w/a*", Storable::nfreeze ($ref)
658	};	737	};
659		738
660	=back	739	=back
		740
		741	=item $handle->push_shutdown
		742
		743	Sometimes you know you want to close the socket after writing your data
		744	before it was actually written. One way to do that is to replace your
		745	C<on_drain> handler by a callback that shuts down the socket (and set
		746	C<low_water_mark> to C<0>). This method is a shorthand for just that, and
		747	replaces the C<on_drain> callback with:
		748
		749	sub { shutdown $_[0]{fh}, 1 } # for push_shutdown
		750
		751	This simply shuts down the write side and signals an EOF condition to the
		752	the peer.
		753
		754	You can rely on the normal read queue and C<on_eof> handling
		755	afterwards. This is the cleanest way to close a connection.
		756
		757	=cut
		758
		759	sub push_shutdown {
		760	my ($self) = @_;
		761
		762	delete $self->{low_water_mark};
		763	$self->on_drain (sub { shutdown $_[0]{fh}, 1 });
		764	}
661		765
662	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)	766	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)
663		767
664	This function (not method) lets you add your own types to C<push_write>.	768	This function (not method) lets you add your own types to C<push_write>.
665	Whenever the given C<type> is used, C<push_write> will invoke the code	769	Whenever the given C<type> is used, C<push_write> will invoke the code
…		…
765		869
766	if (	870	if (
767	defined $self->{rbuf_max}	871	defined $self->{rbuf_max}
768	&& $self->{rbuf_max} < length $self->{rbuf}	872	&& $self->{rbuf_max} < length $self->{rbuf}
769	) {	873	) {
770	$self->_error (&Errno::ENOSPC, 1), return;	874	$self->_error (Errno::ENOSPC, 1), return;
771	}	875	}
772		876
773	while () {	877	while () {
774	# we need to use a separate tls read buffer, as we must not receive data while	878	# we need to use a separate tls read buffer, as we must not receive data while
775	# we are draining the buffer, and this can only happen with TLS.	879	# we are draining the buffer, and this can only happen with TLS.
…		…
779		883
780	if (my $cb = shift @{ $self->{_queue} }) {	884	if (my $cb = shift @{ $self->{_queue} }) {
781	unless ($cb->($self)) {	885	unless ($cb->($self)) {
782	if ($self->{_eof}) {	886	if ($self->{_eof}) {
783	# no progress can be made (not enough data and no data forthcoming)	887	# no progress can be made (not enough data and no data forthcoming)
784	$self->_error (&Errno::EPIPE, 1), return;	888	$self->_error (Errno::EPIPE, 1), return;
785	}	889	}
786		890
787	unshift @{ $self->{_queue} }, $cb;	891	unshift @{ $self->{_queue} }, $cb;
788	last;	892	last;
789	}	893	}
…		…
797	&& !@{ $self->{_queue} } # and the queue is still empty	901	&& !@{ $self->{_queue} } # and the queue is still empty
798	&& $self->{on_read} # but we still have on_read	902	&& $self->{on_read} # but we still have on_read
799	) {	903	) {
800	# no further data will arrive	904	# no further data will arrive
801	# so no progress can be made	905	# so no progress can be made
802	$self->_error (&Errno::EPIPE, 1), return	906	$self->_error (Errno::EPIPE, 1), return
803	if $self->{_eof};	907	if $self->{_eof};
804		908
805	last; # more data might arrive	909	last; # more data might arrive
806	}	910	}
807	} else {	911	} else {
…		…
813		917
814	if ($self->{_eof}) {	918	if ($self->{_eof}) {
815	if ($self->{on_eof}) {	919	if ($self->{on_eof}) {
816	$self->{on_eof}($self)	920	$self->{on_eof}($self)
817	} else {	921	} else {
818	$self->_error (0, 1);	922	$self->_error (0, 1, "Unexpected end-of-file");
819	}	923	}
820	}	924	}
821		925
822	# may need to restart read watcher	926	# may need to restart read watcher
823	unless ($self->{_rw}) {	927	unless ($self->{_rw}) {
…		…
1057	return 1;	1161	return 1;
1058	}	1162	}
1059		1163
1060	# reject	1164	# reject
1061	if ($reject && $$rbuf =~ $reject) {	1165	if ($reject && $$rbuf =~ $reject) {
1062	$self->_error (&Errno::EBADMSG);	1166	$self->_error (Errno::EBADMSG);
1063	}	1167	}
1064		1168
1065	# skip	1169	# skip
1066	if ($skip && $$rbuf =~ $skip) {	1170	if ($skip && $$rbuf =~ $skip) {
1067	$data .= substr $$rbuf, 0, $+[0], "";	1171	$data .= substr $$rbuf, 0, $+[0], "";
…		…
1083	my ($self, $cb) = @_;	1187	my ($self, $cb) = @_;
1084		1188
1085	sub {	1189	sub {
1086	unless ($_[0]{rbuf} =~ s/^(0\|[1-9][0-9]*)://) {	1190	unless ($_[0]{rbuf} =~ s/^(0\|[1-9][0-9]*)://) {
1087	if ($_[0]{rbuf} =~ /[^0-9]/) {	1191	if ($_[0]{rbuf} =~ /[^0-9]/) {
1088	$self->_error (&Errno::EBADMSG);	1192	$self->_error (Errno::EBADMSG);
1089	}	1193	}
1090	return;	1194	return;
1091	}	1195	}
1092		1196
1093	my $len = $1;	1197	my $len = $1;
…		…
1096	my $string = $_[1];	1200	my $string = $_[1];
1097	$_[0]->unshift_read (chunk => 1, sub {	1201	$_[0]->unshift_read (chunk => 1, sub {
1098	if ($_[1] eq ",") {	1202	if ($_[1] eq ",") {
1099	$cb->($_[0], $string);	1203	$cb->($_[0], $string);
1100	} else {	1204	} else {
1101	$self->_error (&Errno::EBADMSG);	1205	$self->_error (Errno::EBADMSG);
1102	}	1206	}
1103	});	1207	});
1104	});	1208	});
1105		1209
1106	1	1210	1
…		…
1173	=cut	1277	=cut
1174		1278
1175	register_read_type json => sub {	1279	register_read_type json => sub {
1176	my ($self, $cb) = @_;	1280	my ($self, $cb) = @_;
1177		1281
1178	require JSON;	1282	my $json = $self->{json} \|\|=
		1283	eval { require JSON::XS; JSON::XS->new->utf8 }
		1284	\|\| do { require JSON; JSON->new->utf8 };
1179		1285
1180	my $data;	1286	my $data;
1181	my $rbuf = \$self->{rbuf};	1287	my $rbuf = \$self->{rbuf};
1182
1183	my $json = $self->{json} \|\|= JSON->new->utf8;
1184		1288
1185	sub {	1289	sub {
1186	my $ref = eval { $json->incr_parse ($self->{rbuf}) };	1290	my $ref = eval { $json->incr_parse ($self->{rbuf}) };
1187		1291
1188	if ($ref) {	1292	if ($ref) {
…		…
1196	$json->incr_skip;	1300	$json->incr_skip;
1197		1301
1198	$self->{rbuf} = $json->incr_text;	1302	$self->{rbuf} = $json->incr_text;
1199	$json->incr_text = "";	1303	$json->incr_text = "";
1200		1304
1201	$self->_error (&Errno::EBADMSG);	1305	$self->_error (Errno::EBADMSG);
1202		1306
1203	()	1307	()
1204	} else {	1308	} else {
1205	$self->{rbuf} = "";	1309	$self->{rbuf} = "";
1206		1310
…		…
1243	# read remaining chunk	1347	# read remaining chunk
1244	$_[0]->unshift_read (chunk => $len, sub {	1348	$_[0]->unshift_read (chunk => $len, sub {
1245	if (my $ref = eval { Storable::thaw ($_[1]) }) {	1349	if (my $ref = eval { Storable::thaw ($_[1]) }) {
1246	$cb->($_[0], $ref);	1350	$cb->($_[0], $ref);
1247	} else {	1351	} else {
1248	$self->_error (&Errno::EBADMSG);	1352	$self->_error (Errno::EBADMSG);
1249	}	1353	}
1250	});	1354	});
1251	}	1355	}
1252		1356
1253	1	1357	1
…		…
1332	}	1436	}
1333	});	1437	});
1334	}	1438	}
1335	}	1439	}
1336		1440
		1441	our $ERROR_SYSCALL;
		1442	our $ERROR_WANT_READ;
		1443
		1444	sub _tls_error {
		1445	my ($self, $err) = @_;
		1446
		1447	return $self->_error ($!, 1)
		1448	if $err == Net::SSLeay::ERROR_SYSCALL ();
		1449
		1450	my $err =Net::SSLeay::ERR_error_string (Net::SSLeay::ERR_get_error ());
		1451
		1452	# reduce error string to look less scary
		1453	$err =~ s/^error:[0-9a-fA-F]{8}:[^:]+:([^:]+):/\L$1: /;
		1454
		1455	if ($self->{_on_starttls}) {
		1456	(delete $self->{_on_starttls})->($self, undef, $err);
		1457	&_freetls;
		1458	} else {
		1459	&_freetls;
		1460	$self->_error (Errno::EPROTO, 1, $err);
		1461	}
		1462	}
		1463
1337	# poll the write BIO and send the data if applicable	1464	# poll the write BIO and send the data if applicable
		1465	# also decode read data if possible
		1466	# this is basiclaly our TLS state machine
		1467	# more efficient implementations are possible with openssl,
		1468	# but not with the buggy and incomplete Net::SSLeay.
1338	sub _dotls {	1469	sub _dotls {
1339	my ($self) = @_;	1470	my ($self) = @_;
1340		1471
1341	my $tmp;	1472	my $tmp;
1342		1473
1343	if (length $self->{_tls_wbuf}) {	1474	if (length $self->{_tls_wbuf}) {
1344	while (($tmp = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) {	1475	while (($tmp = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) {
1345	substr $self->{_tls_wbuf}, 0, $tmp, "";	1476	substr $self->{_tls_wbuf}, 0, $tmp, "";
1346	}	1477	}
		1478
		1479	$tmp = Net::SSLeay::get_error ($self->{tls}, $tmp);
		1480	return $self->_tls_error ($tmp)
		1481	if $tmp != $ERROR_WANT_READ
		1482	&& ($tmp != $ERROR_SYSCALL \|\| $!);
1347	}	1483	}
1348		1484
1349	while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) {	1485	while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) {
1350	unless (length $tmp) {	1486	unless (length $tmp) {
1351	# let's treat SSL-eof as we treat normal EOF	1487	$self->{_on_starttls}
1352	delete $self->{_rw};	1488	and (delete $self->{_on_starttls})->($self, undef, "EOF during handshake"); # ???
1353	$self->{_eof} = 1;
1354	&_freetls;	1489	&_freetls;
		1490
		1491	if ($self->{on_stoptls}) {
		1492	$self->{on_stoptls}($self);
		1493	return;
		1494	} else {
		1495	# let's treat SSL-eof as we treat normal EOF
		1496	delete $self->{_rw};
		1497	$self->{_eof} = 1;
		1498	}
1355	}	1499	}
1356		1500
1357	$self->{_tls_rbuf} .= $tmp;	1501	$self->{_tls_rbuf} .= $tmp;
1358	$self->_drain_rbuf unless $self->{_in_drain};	1502	$self->_drain_rbuf unless $self->{_in_drain};
1359	$self->{tls} or return; # tls session might have gone away in callback	1503	$self->{tls} or return; # tls session might have gone away in callback
1360	}	1504	}
1361		1505
1362	$tmp = Net::SSLeay::get_error ($self->{tls}, -1);	1506	$tmp = Net::SSLeay::get_error ($self->{tls}, -1);
1363
1364	if ($tmp != Net::SSLeay::ERROR_WANT_READ ()) {
1365	if ($tmp == Net::SSLeay::ERROR_SYSCALL ()) {
1366	return $self->_error ($!, 1);	1507	return $self->_tls_error ($tmp)
1367	} elsif ($tmp == Net::SSLeay::ERROR_SSL ()) {	1508	if $tmp != $ERROR_WANT_READ
1368	return $self->_error (&Errno::EIO, 1);	1509	&& ($tmp != $ERROR_SYSCALL \|\| $!);
1369	}
1370
1371	# all other errors are fine for our purposes
1372	}
1373		1510
1374	while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) {	1511	while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) {
1375	$self->{wbuf} .= $tmp;	1512	$self->{wbuf} .= $tmp;
1376	$self->_drain_wbuf;	1513	$self->_drain_wbuf;
1377	}	1514	}
		1515
		1516	$self->{_on_starttls}
		1517	and Net::SSLeay::state ($self->{tls}) == Net::SSLeay::ST_OK ()
		1518	and (delete $self->{_on_starttls})->($self, 1, "TLS/SSL connection established");
1378	}	1519	}
1379		1520
1380	=item $handle->starttls ($tls[, $tls_ctx])	1521	=item $handle->starttls ($tls[, $tls_ctx])
1381		1522
1382	Instead of starting TLS negotiation immediately when the AnyEvent::Handle	1523	Instead of starting TLS negotiation immediately when the AnyEvent::Handle
…		…
1384	C<starttls>.	1525	C<starttls>.
1385		1526
1386	The first argument is the same as the C<tls> constructor argument (either	1527	The first argument is the same as the C<tls> constructor argument (either
1387	C<"connect">, C<"accept"> or an existing Net::SSLeay object).	1528	C<"connect">, C<"accept"> or an existing Net::SSLeay object).
1388		1529
1389	The second argument is the optional C<Net::SSLeay::CTX> object that is	1530	The second argument is the optional C<AnyEvent::TLS> object that is used
1390	used when AnyEvent::Handle has to create its own TLS connection object.	1531	when AnyEvent::Handle has to create its own TLS connection object, or
		1532	a hash reference with C<< key => value >> pairs that will be used to
		1533	construct a new context.
1391		1534
1392	The TLS connection object will end up in C<< $handle->{tls} >> after this	1535	The TLS connection object will end up in C<< $handle->{tls} >>, the TLS
1393	call and can be used or changed to your liking. Note that the handshake	1536	context in C<< $handle->{tls_ctx} >> after this call and can be used or
1394	might have already started when this function returns.	1537	changed to your liking. Note that the handshake might have already started
		1538	when this function returns.
1395		1539
1396	If it an error to start a TLS handshake more than once per	1540	If it an error to start a TLS handshake more than once per
1397	AnyEvent::Handle object (this is due to bugs in OpenSSL).	1541	AnyEvent::Handle object (this is due to bugs in OpenSSL).
1398		1542
1399	=cut	1543	=cut
1400		1544
		1545	our %TLS_CACHE; #TODO not yet documented, should we?
		1546
1401	sub starttls {	1547	sub starttls {
1402	my ($self, $ssl, $ctx) = @_;	1548	my ($self, $ssl, $ctx) = @_;
1403		1549
1404	require Net::SSLeay;	1550	require Net::SSLeay;
1405		1551
1406	Carp::croak "it is an error to call starttls more than once on an AnyEvent::Handle object"	1552	Carp::croak "it is an error to call starttls more than once on an AnyEvent::Handle object"
1407	if $self->{tls};	1553	if $self->{tls};
		1554
		1555	$ERROR_SYSCALL = Net::SSLeay::ERROR_SYSCALL ();
		1556	$ERROR_WANT_READ = Net::SSLeay::ERROR_WANT_READ ();
		1557
		1558	$ctx \|\|= $self->{tls_ctx};
		1559
		1560	if ("HASH" eq ref $ctx) {
		1561	require AnyEvent::TLS;
		1562
		1563	local $Carp::CarpLevel = 1; # skip ourselves when creating a new context
		1564
		1565	if ($ctx->{cache}) {
		1566	my $key = $ctx+0;
		1567	$ctx = $TLS_CACHE{$key} \|\|= new AnyEvent::TLS %$ctx;
		1568	} else {
		1569	$ctx = new AnyEvent::TLS %$ctx;
		1570	}
		1571	}
1408		1572
1409	if ($ssl eq "accept") {	1573	$self->{tls_ctx} = $ctx \|\| TLS_CTX ();
1410	$ssl = Net::SSLeay::new ($ctx \|\| TLS_CTX ());	1574	$self->{tls} = $ssl = $self->{tls_ctx}->_get_session ($ssl, $self, $self->{peername});
1411	Net::SSLeay::set_accept_state ($ssl);
1412	} elsif ($ssl eq "connect") {
1413	$ssl = Net::SSLeay::new ($ctx \|\| TLS_CTX ());
1414	Net::SSLeay::set_connect_state ($ssl);
1415	}
1416
1417	$self->{tls} = $ssl;
1418		1575
1419	# basically, this is deep magic (because SSL_read should have the same issues)	1576	# basically, this is deep magic (because SSL_read should have the same issues)
1420	# but the openssl maintainers basically said: "trust us, it just works".	1577	# but the openssl maintainers basically said: "trust us, it just works".
1421	# (unfortunately, we have to hardcode constants because the abysmally misdesigned	1578	# (unfortunately, we have to hardcode constants because the abysmally misdesigned
1422	# and mismaintained ssleay-module doesn't even offer them).	1579	# and mismaintained ssleay-module doesn't even offer them).
…		…
1426	#	1583	#
1427	# note that we do not try to keep the length constant between writes as we are required to do.	1584	# note that we do not try to keep the length constant between writes as we are required to do.
1428	# we assume that most (but not all) of this insanity only applies to non-blocking cases,	1585	# we assume that most (but not all) of this insanity only applies to non-blocking cases,
1429	# and we drive openssl fully in blocking mode here. Or maybe we don't - openssl seems to	1586	# and we drive openssl fully in blocking mode here. Or maybe we don't - openssl seems to
1430	# have identity issues in that area.	1587	# have identity issues in that area.
1431	Net::SSLeay::CTX_set_mode ($self->{tls},	1588	# Net::SSLeay::CTX_set_mode ($ssl,
1432	(eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } \|\| 1)	1589	# (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } \|\| 1)
1433	\| (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } \|\| 2));	1590	# \| (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } \|\| 2));
		1591	Net::SSLeay::CTX_set_mode ($ssl, 1\|2);
1434		1592
1435	$self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());	1593	$self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
1436	$self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());	1594	$self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
1437		1595
1438	Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio});	1596	Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio});
		1597
		1598	$self->{_on_starttls} = sub { $_[0]{on_starttls}(@_) }
		1599	if $self->{on_starttls};
1439		1600
1440	&_dotls; # need to trigger the initial handshake	1601	&_dotls; # need to trigger the initial handshake
1441	$self->start_read; # make sure we actually do read	1602	$self->start_read; # make sure we actually do read
1442	}	1603	}
1443		1604
…		…
1456	if ($self->{tls}) {	1617	if ($self->{tls}) {
1457	Net::SSLeay::shutdown ($self->{tls});	1618	Net::SSLeay::shutdown ($self->{tls});
1458		1619
1459	&_dotls;	1620	&_dotls;
1460		1621
1461	# we don't give a shit. no, we do, but we can't. no...	1622	# # we don't give a shit. no, we do, but we can't. no...#d#
1462	# we, we... have to use openssl :/	1623	# # we, we... have to use openssl :/#d#
1463	&_freetls;	1624	# &_freetls;#d#
1464	}	1625	}
1465	}	1626	}
1466		1627
1467	sub _freetls {	1628	sub _freetls {
1468	my ($self) = @_;	1629	my ($self) = @_;
1469		1630
1470	return unless $self->{tls};	1631	return unless $self->{tls};
1471		1632
1472	Net::SSLeay::free (delete $self->{tls});	1633	$self->{tls_ctx}->_put_session (delete $self->{tls});
1473		1634
1474	delete @$self{qw(_rbio _wbio _tls_wbuf)};	1635	delete @$self{qw(_rbio _wbio _tls_wbuf _on_starttls)};
1475	}	1636	}
1476		1637
1477	sub DESTROY {	1638	sub DESTROY {
1478	my $self = shift;	1639	my ($self) = @_;
1479		1640
1480	&_freetls;	1641	&_freetls;
1481		1642
1482	my $linger = exists $self->{linger} ? $self->{linger} : 3600;	1643	my $linger = exists $self->{linger} ? $self->{linger} : 3600;
1483		1644
…		…
1503	}	1664	}
1504		1665
1505	=item $handle->destroy	1666	=item $handle->destroy
1506		1667
1507	Shuts down the handle object as much as possible - this call ensures that	1668	Shuts down the handle object as much as possible - this call ensures that
1508	no further callbacks will be invoked and resources will be freed as much	1669	no further callbacks will be invoked and as many resources as possible
1509	as possible. You must not call any methods on the object afterwards.	1670	will be freed. You must not call any methods on the object afterwards.
1510		1671
1511	Normally, you can just "forget" any references to an AnyEvent::Handle	1672	Normally, you can just "forget" any references to an AnyEvent::Handle
1512	object and it will simply shut down. This works in fatal error and EOF	1673	object and it will simply shut down. This works in fatal error and EOF
1513	callbacks, as well as code outside. It does I<NOT> work in a read or write	1674	callbacks, as well as code outside. It does I<NOT> work in a read or write
1514	callback, so when you want to destroy the AnyEvent::Handle object from	1675	callback, so when you want to destroy the AnyEvent::Handle object from
1515	within such an callback. You I<MUST> call C<< ->destroy >> explicitly in	1676	within such an callback. You I<MUST> call C<< ->destroy >> explicitly in
1516	that case.	1677	that case.
1517		1678
		1679	Destroying the handle object in this way has the advantage that callbacks
		1680	will be removed as well, so if those are the only reference holders (as
		1681	is common), then one doesn't need to do anything special to break any
		1682	reference cycles.
		1683
1518	The handle might still linger in the background and write out remaining	1684	The handle might still linger in the background and write out remaining
1519	data, as specified by the C<linger> option, however.	1685	data, as specified by the C<linger> option, however.
1520		1686
1521	=cut	1687	=cut
1522		1688
…		…
1527	%$self = ();	1693	%$self = ();
1528	}	1694	}
1529		1695
1530	=item AnyEvent::Handle::TLS_CTX	1696	=item AnyEvent::Handle::TLS_CTX
1531		1697
1532	This function creates and returns the Net::SSLeay::CTX object used by	1698	This function creates and returns the AnyEvent::TLS object used by default
1533	default for TLS mode.	1699	for TLS mode.
1534		1700
1535	The context is created like this:	1701	The context is created by calling L<AnyEvent::TLS> without any arguments.
1536
1537	Net::SSLeay::load_error_strings;
1538	Net::SSLeay::SSLeay_add_ssl_algorithms;
1539	Net::SSLeay::randomize;
1540
1541	my $CTX = Net::SSLeay::CTX_new;
1542
1543	Net::SSLeay::CTX_set_options $CTX, Net::SSLeay::OP_ALL
1544		1702
1545	=cut	1703	=cut
1546		1704
1547	our $TLS_CTX;	1705	our $TLS_CTX;
1548		1706
1549	sub TLS_CTX() {	1707	sub TLS_CTX() {
1550	$TLS_CTX \|\| do {	1708	$TLS_CTX \|\|= do {
1551	require Net::SSLeay;	1709	require AnyEvent::TLS;
1552		1710
1553	Net::SSLeay::load_error_strings ();	1711	new AnyEvent::TLS
1554	Net::SSLeay::SSLeay_add_ssl_algorithms ();
1555	Net::SSLeay::randomize ();
1556
1557	$TLS_CTX = Net::SSLeay::CTX_new ();
1558
1559	Net::SSLeay::CTX_set_options ($TLS_CTX, Net::SSLeay::OP_ALL ());
1560
1561	$TLS_CTX
1562	}	1712	}
1563	}	1713	}
1564		1714
1565	=back	1715	=back
1566		1716
…		…
1605		1755
1606	$handle->on_read (sub { });	1756	$handle->on_read (sub { });
1607	$handle->on_eof (undef);	1757	$handle->on_eof (undef);
1608	$handle->on_error (sub {	1758	$handle->on_error (sub {
1609	my $data = delete $_[0]{rbuf};	1759	my $data = delete $_[0]{rbuf};
1610	undef $handle;
1611	});	1760	});
1612		1761
1613	The reason to use C<on_error> is that TCP connections, due to latencies	1762	The reason to use C<on_error> is that TCP connections, due to latencies
1614	and packets loss, might get closed quite violently with an error, when in	1763	and packets loss, might get closed quite violently with an error, when in
1615	fact, all data has been received.	1764	fact, all data has been received.
…		…
1631	$handle->on_drain (sub {	1780	$handle->on_drain (sub {
1632	warn "all data submitted to the kernel\n";	1781	warn "all data submitted to the kernel\n";
1633	undef $handle;	1782	undef $handle;
1634	});	1783	});
1635		1784
		1785	If you just want to queue some data and then signal EOF to the other side,
		1786	consider using C<< ->push_shutdown >> instead.
		1787
		1788	=item I want to contact a TLS/SSL server, I don't care about security.
		1789
		1790	If your TLS server is a pure TLS server (e.g. HTTPS) that only speaks TLS,
		1791	simply connect to it and then create the AnyEvent::Handle with the C<tls>
		1792	parameter:
		1793
		1794	tcp_connect $host, $port, sub {
		1795	my ($fh) = @_;
		1796
		1797	my $handle = new AnyEvent::Handle
		1798	fh => $fh,
		1799	tls => "connect",
		1800	on_error => sub { ... };
		1801
		1802	$handle->push_write (...);
		1803	};
		1804
		1805	=item I want to contact a TLS/SSL server, I do care about security.
		1806
		1807	Then you should additionally enable certificate verification, including
		1808	peername verification, if the protocol you use supports it (see
		1809	L<AnyEvent::TLS>, C<verify_peername>).
		1810
		1811	E.g. for HTTPS:
		1812
		1813	tcp_connect $host, $port, sub {
		1814	my ($fh) = @_;
		1815
		1816	my $handle = new AnyEvent::Handle
		1817	fh => $fh,
		1818	peername => $host,
		1819	tls => "connect",
		1820	tls_ctx => { verify => 1, verify_peername => "https" },
		1821	...
		1822
		1823	Note that you must specify the hostname you connected to (or whatever
		1824	"peername" the protocol needs) as the C<peername> argument, otherwise no
		1825	peername verification will be done.
		1826
		1827	The above will use the system-dependent default set of trusted CA
		1828	certificates. If you want to check against a specific CA, add the
		1829	C<ca_file> (or C<ca_cert>) arguments to C<tls_ctx>:
		1830
		1831	tls_ctx => {
		1832	verify => 1,
		1833	verify_peername => "https",
		1834	ca_file => "my-ca-cert.pem",
		1835	},
		1836
		1837	=item I want to create a TLS/SSL server, how do I do that?
		1838
		1839	Well, you first need to get a server certificate and key. You have
		1840	three options: a) ask a CA (buy one, use cacert.org etc.) b) create a
		1841	self-signed certificate (cheap. check the search engine of your choice,
		1842	there are many tutorials on the net) or c) make your own CA (tinyca2 is a
		1843	nice program for that purpose).
		1844
		1845	Then create a file with your private key (in PEM format, see
		1846	L<AnyEvent::TLS>), followed by the certificate (also in PEM format). The
		1847	file should then look like this:
		1848
		1849	-----BEGIN RSA PRIVATE KEY-----
		1850	...header data
		1851	... lots of base64'y-stuff
		1852	-----END RSA PRIVATE KEY-----
		1853
		1854	-----BEGIN CERTIFICATE-----
		1855	... lots of base64'y-stuff
		1856	-----END CERTIFICATE-----
		1857
		1858	The important bits are the "PRIVATE KEY" and "CERTIFICATE" parts. Then
		1859	specify this file as C<cert_file>:
		1860
		1861	tcp_server undef, $port, sub {
		1862	my ($fh) = @_;
		1863
		1864	my $handle = new AnyEvent::Handle
		1865	fh => $fh,
		1866	tls => "accept",
		1867	tls_ctx => { cert_file => "my-server-keycert.pem" },
		1868	...
		1869
		1870	When you have intermediate CA certificates that your clients might not
		1871	know about, just append them to the C<cert_file>.
		1872
1636	=back	1873	=back
1637		1874
1638		1875
1639	=head1 SUBCLASSING AnyEvent::Handle	1876	=head1 SUBCLASSING AnyEvent::Handle
1640		1877

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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents): Revision 1.118 by root, Thu Feb 12 17:33:38 2009 UTC vs. Revision 1.151 by root, Thu Jul 16 04:20:23 2009 UTC

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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.118 by root, Thu Feb 12 17:33:38 2009 UTC vs.
Revision 1.151 by root, Thu Jul 16 04:20:23 2009 UTC