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

Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.123 by root, Mon Apr 20 14:34:18 2009 UTC vs.
Revision 1.173 by root, Thu Aug 6 13:45:04 2009 UTC

…		…
1	package AnyEvent::Handle;	1	package AnyEvent::Handle;
2		2
3	no warnings;
4	use strict qw(subs vars);
5
6	use AnyEvent ();
7	use AnyEvent::Util qw(WSAEWOULDBLOCK);
8	use Scalar::Util ();	3	use Scalar::Util ();
9	use Carp ();	4	use Carp ();
10	use Fcntl ();
11	use Errno qw(EAGAIN EINTR);	5	use Errno qw(EAGAIN EINTR);
12		6
		7	use AnyEvent (); BEGIN { AnyEvent::common_sense }
		8	use AnyEvent::Util qw(WSAEWOULDBLOCK);
		9
13	=head1 NAME	10	=head1 NAME
14		11
15	AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent	12	AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent
16		13
17	=cut	14	=cut
18		15
19	our $VERSION = 4.352;	16	our $VERSION = 4.91;
20		17
21	=head1 SYNOPSIS	18	=head1 SYNOPSIS
22		19
23	use AnyEvent;	20	use AnyEvent;
24	use AnyEvent::Handle;	21	use AnyEvent::Handle;
25		22
26	my $cv = AnyEvent->condvar;	23	my $cv = AnyEvent->condvar;
27		24
28	my $handle =	25	my $hdl; $hdl = new AnyEvent::Handle
29	AnyEvent::Handle->new (
30	fh => \*STDIN,	26	fh => \*STDIN,
31	on_eof => sub {	27	on_error => sub {
		28	my ($hdl, $fatal, $msg) = @_;
		29	warn "got error $msg\n";
		30	$hdl->destroy;
32	$cv->send;	31	$cv->send;
33	},
34	);	32	);
35		33
36	# send some request line	34	# send some request line
37	$handle->push_write ("getinfo\015\012");	35	$hdl->push_write ("getinfo\015\012");
38		36
39	# read the response line	37	# read the response line
40	$handle->push_read (line => sub {	38	$hdl->push_read (line => sub {
41	my ($handle, $line) = @_;	39	my ($hdl, $line) = @_;
42	warn "read line <$line>\n";	40	warn "got line <$line>\n";
43	$cv->send;	41	$cv->send;
44	});	42	});
45		43
46	$cv->recv;	44	$cv->recv;
47		45
48	=head1 DESCRIPTION	46	=head1 DESCRIPTION
49		47
50	This module is a helper module to make it easier to do event-based I/O on	48	This module is a helper module to make it easier to do event-based I/O on
51	filehandles. For utility functions for doing non-blocking connects and accepts	49	filehandles.
52	on sockets see L<AnyEvent::Util>.
53		50
54	The L<AnyEvent::Intro> tutorial contains some well-documented	51	The L<AnyEvent::Intro> tutorial contains some well-documented
55	AnyEvent::Handle examples.	52	AnyEvent::Handle examples.
56		53
57	In the following, when the documentation refers to of "bytes" then this	54	In the following, when the documentation refers to of "bytes" then this
58	means characters. As sysread and syswrite are used for all I/O, their	55	means characters. As sysread and syswrite are used for all I/O, their
59	treatment of characters applies to this module as well.	56	treatment of characters applies to this module as well.
60		57
		58	At the very minimum, you should specify C<fh> or C<connect>, and the
		59	C<on_error> callback.
		60
61	All callbacks will be invoked with the handle object as their first	61	All callbacks will be invoked with the handle object as their first
62	argument.	62	argument.
63		63
64	=head1 METHODS	64	=head1 METHODS
65		65
66	=over 4	66	=over 4
67		67
68	=item B<new (%args)>	68	=item $handle = B<new> AnyEvent::TLS fh => $filehandle, key => value...
69		69
70	The constructor supports these arguments (all as key => value pairs).	70	The constructor supports these arguments (all as C<< key => value >> pairs).
71		71
72	=over 4	72	=over 4
73		73
74	=item fh => $filehandle [MANDATORY]	74	=item fh => $filehandle [C<fh> or C<connect> MANDATORY]
75		75
76	The filehandle this L<AnyEvent::Handle> object will operate on.	76	The filehandle this L<AnyEvent::Handle> object will operate on.
77
78	NOTE: The filehandle will be set to non-blocking mode (using	77	NOTE: The filehandle will be set to non-blocking mode (using
79	C<AnyEvent::Util::fh_nonblocking>) by the constructor and needs to stay in	78	C<AnyEvent::Util::fh_nonblocking>) by the constructor and needs to stay in
80	that mode.	79	that mode.
81		80
		81	=item connect => [$host, $service] [C<fh> or C<connect> MANDATORY]
		82
		83	Try to connect to the specified host and service (port), using
		84	C<AnyEvent::Socket::tcp_connect>. The C<$host> additionally becomes the
		85	default C<peername>.
		86
		87	You have to specify either this parameter, or C<fh>, above.
		88
		89	It is possible to push requests on the read and write queues, and modify
		90	properties of the stream, even while AnyEvent::Handle is connecting.
		91
		92	When this parameter is specified, then the C<on_prepare>,
		93	C<on_connect_error> and C<on_connect> callbacks will be called under the
		94	appropriate circumstances:
		95
		96	=over 4
		97
		98	=item on_prepare => $cb->($handle)
		99
		100	This (rarely used) callback is called before a new connection is
		101	attempted, but after the file handle has been created. It could be used to
		102	prepare the file handle with parameters required for the actual connect
		103	(as opposed to settings that can be changed when the connection is already
		104	established).
		105
		106	The return value of this callback should be the connect timeout value in
		107	seconds (or C<0>, or C<undef>, or the empty list, to indicate the default
		108	timeout is to be used).
		109
		110	=item on_connect => $cb->($handle, $host, $port, $retry->())
		111
		112	This callback is called when a connection has been successfully established.
		113
		114	The actual numeric host and port (the socket peername) are passed as
		115	parameters, together with a retry callback.
		116
		117	When, for some reason, the handle is not acceptable, then calling
		118	C<$retry> will continue with the next conenction target (in case of
		119	multi-homed hosts or SRV records there can be multiple connection
		120	endpoints). When it is called then the read and write queues, eof status,
		121	tls status and similar properties of the handle are being reset.
		122
		123	In most cases, ignoring the C<$retry> parameter is the way to go.
		124
		125	=item on_connect_error => $cb->($handle, $message)
		126
		127	This callback is called when the conenction could not be
		128	established. C<$!> will contain the relevant error code, and C<$message> a
		129	message describing it (usually the same as C<"$!">).
		130
		131	If this callback isn't specified, then C<on_error> will be called with a
		132	fatal error instead.
		133
		134	=back
		135
		136	=item on_error => $cb->($handle, $fatal, $message)
		137
		138	This is the error callback, which is called when, well, some error
		139	occured, such as not being able to resolve the hostname, failure to
		140	connect or a read error.
		141
		142	Some errors are fatal (which is indicated by C<$fatal> being true). On
		143	fatal errors the handle object will be destroyed (by a call to C<< ->
		144	destroy >>) after invoking the error callback (which means you are free to
		145	examine the handle object). Examples of fatal errors are an EOF condition
		146	with active (but unsatisifable) read watchers (C<EPIPE>) or I/O errors. In
		147	cases where the other side can close the connection at their will it is
		148	often easiest to not report C<EPIPE> errors in this callback.
		149
		150	AnyEvent::Handle tries to find an appropriate error code for you to check
		151	against, but in some cases (TLS errors), this does not work well. It is
		152	recommended to always output the C<$message> argument in human-readable
		153	error messages (it's usually the same as C<"$!">).
		154
		155	Non-fatal errors can be retried by simply returning, but it is recommended
		156	to simply ignore this parameter and instead abondon the handle object
		157	when this callback is invoked. Examples of non-fatal errors are timeouts
		158	C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>).
		159
		160	On callback entrance, the value of C<$!> contains the operating system
		161	error code (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT>, C<EBADMSG> or
		162	C<EPROTO>).
		163
		164	While not mandatory, it is I<highly> recommended to set this callback, as
		165	you will not be notified of errors otherwise. The default simply calls
		166	C<croak>.
		167
		168	=item on_read => $cb->($handle)
		169
		170	This sets the default read callback, which is called when data arrives
		171	and no read request is in the queue (unlike read queue callbacks, this
		172	callback will only be called when at least one octet of data is in the
		173	read buffer).
		174
		175	To access (and remove data from) the read buffer, use the C<< ->rbuf >>
		176	method or access the C<< $handle->{rbuf} >> member directly. Note that you
		177	must not enlarge or modify the read buffer, you can only remove data at
		178	the beginning from it.
		179
		180	When an EOF condition is detected then AnyEvent::Handle will first try to
		181	feed all the remaining data to the queued callbacks and C<on_read> before
		182	calling the C<on_eof> callback. If no progress can be made, then a fatal
		183	error will be raised (with C<$!> set to C<EPIPE>).
		184
		185	Note that, unlike requests in the read queue, an C<on_read> callback
		186	doesn't mean you I<require> some data: if there is an EOF and there
		187	are outstanding read requests then an error will be flagged. With an
		188	C<on_read> callback, the C<on_eof> callback will be invoked.
		189
82	=item on_eof => $cb->($handle)	190	=item on_eof => $cb->($handle)
83		191
84	Set the callback to be called when an end-of-file condition is detected,	192	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	193	i.e. in the case of a socket, when the other side has closed the
86	connection cleanly.	194	connection cleanly, and there are no outstanding read requests in the
		195	queue (if there are read requests, then an EOF counts as an unexpected
		196	connection close and will be flagged as an error).
87		197
88	For sockets, this just means that the other side has stopped sending data,	198	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	199	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	200	callback and continue writing data, as only the read part has been shut
91	down.	201	down.
92		202
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	203	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<$!> set to <0>.	204	set, then a fatal error will be raised with C<$!> set to <0>.
99
100	=item on_error => $cb->($handle, $fatal)
101
102	This is the error callback, which is called when, well, some error
103	occured, such as not being able to resolve the hostname, failure to
104	connect or a read error.
105
106	Some errors are fatal (which is indicated by C<$fatal> being true). On
107	fatal errors the handle object will be shut down and will not be usable
108	(but you are free to look at the current C<< ->rbuf >>). Examples of fatal
109	errors are an EOF condition with active (but unsatisifable) read watchers
110	(C<EPIPE>) or I/O errors.
111
112	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
114	when this callback is invoked. Examples of non-fatal errors are timeouts
115	C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>).
116
117	On callback entrance, the value of C<$!> contains the operating system
118	error (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT> or C<EBADMSG>).
119
120	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
122	C<croak>.
123
124	=item on_read => $cb->($handle)
125
126	This sets the default read callback, which is called when data arrives
127	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
129	read buffer).
130
131	To access (and remove data from) the read buffer, use the C<< ->rbuf >>
132	method or access the C<$handle->{rbuf}> member directly. Note that you
133	must not enlarge or modify the read buffer, you can only remove data at
134	the beginning from it.
135
136	When an EOF condition is detected then AnyEvent::Handle will first try to
137	feed all the remaining data to the queued callbacks and C<on_read> before
138	calling the C<on_eof> callback. If no progress can be made, then a fatal
139	error will be raised (with C<$!> set to C<EPIPE>).
140		205
141	=item on_drain => $cb->($handle)	206	=item on_drain => $cb->($handle)
142		207
143	This sets the callback that is called when the write buffer becomes empty	208	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).	209	(or when the callback is set and the buffer is empty already).
237		302
238	This will not work for partial TLS data that could not be encoded	303	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	304	yet. This data will be lost. Calling the C<stoptls> method in time might
240	help.	305	help.
241		306
		307	=item peername => $string
		308
		309	A string used to identify the remote site - usually the DNS hostname
		310	(I<not> IDN!) used to create the connection, rarely the IP address.
		311
		312	Apart from being useful in error messages, this string is also used in TLS
		313	peername verification (see C<verify_peername> in L<AnyEvent::TLS>). This
		314	verification will be skipped when C<peername> is not specified or
		315	C<undef>.
		316
242	=item tls => "accept" \| "connect" \| Net::SSLeay::SSL object	317	=item tls => "accept" \| "connect" \| Net::SSLeay::SSL object
243		318
244	When this parameter is given, it enables TLS (SSL) mode, that means	319	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	320	AnyEvent will start a TLS handshake as soon as the conenction has been
246	established and will transparently encrypt/decrypt data afterwards.	321	established and will transparently encrypt/decrypt data afterwards.
		322
		323	All TLS protocol errors will be signalled as C<EPROTO>, with an
		324	appropriate error message.
247		325
248	TLS mode requires Net::SSLeay to be installed (it will be loaded	326	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	327	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	328	have a dependency on that module, so if your module requires it, you have
251	to add the dependency yourself.	329	to add the dependency yourself.
…		…
255	mode.	333	mode.
256		334
257	You can also provide your own TLS connection object, but you have	335	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>	336	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	337	or C<Net::SSLeay::set_accept_state> on it before you pass it to
260	AnyEvent::Handle.	338	AnyEvent::Handle. Also, this module will take ownership of this connection
		339	object.
		340
		341	At some future point, AnyEvent::Handle might switch to another TLS
		342	implementation, then the option to use your own session object will go
		343	away.
261		344
262	B<IMPORTANT:> since Net::SSLeay "objects" are really only integers,	345	B<IMPORTANT:> since Net::SSLeay "objects" are really only integers,
263	passing in the wrong integer will lead to certain crash. This most often	346	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	347	happens when one uses a stylish C<< tls => 1 >> and is surprised about the
265	segmentation fault.	348	segmentation fault.
266		349
267	See the C<< ->starttls >> method for when need to start TLS negotiation later.	350	See the C<< ->starttls >> method for when need to start TLS negotiation later.
268		351
269	=item tls_ctx => $ssl_ctx	352	=item tls_ctx => $anyevent_tls
270		353
271	Use the given C<Net::SSLeay::CTX> object to create the new TLS connection	354	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	355	(unless a connection object was specified directly). If this parameter is
273	missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>.	356	missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>.
		357
		358	Instead of an object, you can also specify a hash reference with C<< key
		359	=> value >> pairs. Those will be passed to L<AnyEvent::TLS> to create a
		360	new TLS context object.
		361
		362	=item on_starttls => $cb->($handle, $success[, $error_message])
		363
		364	This callback will be invoked when the TLS/SSL handshake has finished. If
		365	C<$success> is true, then the TLS handshake succeeded, otherwise it failed
		366	(C<on_stoptls> will not be called in this case).
		367
		368	The session in C<< $handle->{tls} >> can still be examined in this
		369	callback, even when the handshake was not successful.
		370
		371	TLS handshake failures will not cause C<on_error> to be invoked when this
		372	callback is in effect, instead, the error message will be passed to C<on_starttls>.
		373
		374	Without this callback, handshake failures lead to C<on_error> being
		375	called, as normal.
		376
		377	Note that you cannot call C<starttls> right again in this callback. If you
		378	need to do that, start an zero-second timer instead whose callback can
		379	then call C<< ->starttls >> again.
		380
		381	=item on_stoptls => $cb->($handle)
		382
		383	When a SSLv3/TLS shutdown/close notify/EOF is detected and this callback is
		384	set, then it will be invoked after freeing the TLS session. If it is not,
		385	then a TLS shutdown condition will be treated like a normal EOF condition
		386	on the handle.
		387
		388	The session in C<< $handle->{tls} >> can still be examined in this
		389	callback.
		390
		391	This callback will only be called on TLS shutdowns, not when the
		392	underlying handle signals EOF.
274		393
275	=item json => JSON or JSON::XS object	394	=item json => JSON or JSON::XS object
276		395
277	This is the json coder object used by the C<json> read and write types.	396	This is the json coder object used by the C<json> read and write types.
278		397
…		…
287		406
288	=cut	407	=cut
289		408
290	sub new {	409	sub new {
291	my $class = shift;	410	my $class = shift;
292
293	my $self = bless { @_ }, $class;	411	my $self = bless { @_ }, $class;
294		412
295	$self->{fh} or Carp::croak "mandatory argument fh is missing";	413	if ($self->{fh}) {
		414	$self->_start;
		415	return unless $self->{fh}; # could be gone by now
		416
		417	} elsif ($self->{connect}) {
		418	require AnyEvent::Socket;
		419
		420	$self->{peername} = $self->{connect}[0]
		421	unless exists $self->{peername};
		422
		423	$self->{_skip_drain_rbuf} = 1;
		424
		425	{
		426	Scalar::Util::weaken (my $self = $self);
		427
		428	$self->{_connect} =
		429	AnyEvent::Socket::tcp_connect (
		430	$self->{connect}[0],
		431	$self->{connect}[1],
		432	sub {
		433	my ($fh, $host, $port, $retry) = @_;
		434
		435	if ($fh) {
		436	$self->{fh} = $fh;
		437
		438	delete $self->{_skip_drain_rbuf};
		439	$self->_start;
		440
		441	$self->{on_connect}
		442	and $self->{on_connect}($self, $host, $port, sub {
		443	delete @$self{qw(fh _tw _ww _rw _eof _queue rbuf _wbuf tls _tls_rbuf _tls_wbuf)};
		444	$self->{_skip_drain_rbuf} = 1;
		445	&$retry;
		446	});
		447
		448	} else {
		449	if ($self->{on_connect_error}) {
		450	$self->{on_connect_error}($self, "$!");
		451	$self->destroy;
		452	} else {
		453	$self->_error ($!, 1);
		454	}
		455	}
		456	},
		457	sub {
		458	local $self->{fh} = $_[0];
		459
		460	$self->{on_prepare}
		461	? $self->{on_prepare}->($self)
		462	: ()
		463	}
		464	);
		465	}
		466
		467	} else {
		468	Carp::croak "AnyEvent::Handle: either an existing fh or the connect parameter must be specified";
		469	}
		470
		471	$self
		472	}
		473
		474	sub _start {
		475	my ($self) = @_;
296		476
297	AnyEvent::Util::fh_nonblocking $self->{fh}, 1;	477	AnyEvent::Util::fh_nonblocking $self->{fh}, 1;
		478
		479	$self->{_activity} = AnyEvent->now;
		480	$self->_timeout;
		481
		482	$self->no_delay (delete $self->{no_delay}) if exists $self->{no_delay};
298		483
299	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx})	484	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx})
300	if $self->{tls};	485	if $self->{tls};
301		486
302	$self->{_activity} = AnyEvent->now;
303	$self->_timeout;
304
305	$self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain};	487	$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		488
308	$self->start_read	489	$self->start_read
309	if $self->{on_read};	490	if $self->{on_read} \|\| @{ $self->{_queue} };
310		491
311	$self	492	$self->_drain_wbuf;
312	}	493	}
313		494
314	sub _shutdown {	495	#sub _shutdown {
315	my ($self) = @_;	496	# my ($self) = @_;
316		497	#
317	delete $self->{_tw};	498	# delete @$self{qw(_tw _rw _ww fh wbuf on_read _queue)};
318	delete $self->{_rw};	499	# $self->{_eof} = 1; # tell starttls et. al to stop trying
319	delete $self->{_ww};	500	#
320	delete $self->{fh};
321
322	&_freetls;	501	# &_freetls;
323		502	#}
324	delete $self->{on_read};
325	delete $self->{_queue};
326	}
327		503
328	sub _error {	504	sub _error {
329	my ($self, $errno, $fatal) = @_;	505	my ($self, $errno, $fatal, $message) = @_;
330
331	$self->_shutdown
332	if $fatal;
333		506
334	$! = $errno;	507	$! = $errno;
		508	$message \|\|= "$!";
335		509
336	if ($self->{on_error}) {	510	if ($self->{on_error}) {
337	$self->{on_error}($self, $fatal);	511	$self->{on_error}($self, $fatal, $message);
		512	$self->destroy if $fatal;
338	} elsif ($self->{fh}) {	513	} elsif ($self->{fh}) {
		514	$self->destroy;
339	Carp::croak "AnyEvent::Handle uncaught error: $!";	515	Carp::croak "AnyEvent::Handle uncaught error: $message";
340	}	516	}
341	}	517	}
342		518
343	=item $fh = $handle->fh	519	=item $fh = $handle->fh
344		520
…		…
401	sub no_delay {	577	sub no_delay {
402	$_[0]{no_delay} = $_[1];	578	$_[0]{no_delay} = $_[1];
403		579
404	eval {	580	eval {
405	local $SIG{__DIE__};	581	local $SIG{__DIE__};
406	setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1];	582	setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1]
		583	if $_[0]{fh};
407	};	584	};
		585	}
		586
		587	=item $handle->on_starttls ($cb)
		588
		589	Replace the current C<on_starttls> callback (see the C<on_starttls> constructor argument).
		590
		591	=cut
		592
		593	sub on_starttls {
		594	$_[0]{on_starttls} = $_[1];
		595	}
		596
		597	=item $handle->on_stoptls ($cb)
		598
		599	Replace the current C<on_stoptls> callback (see the C<on_stoptls> constructor argument).
		600
		601	=cut
		602
		603	sub on_starttls {
		604	$_[0]{on_stoptls} = $_[1];
		605	}
		606
		607	=item $handle->rbuf_max ($max_octets)
		608
		609	Configures the C<rbuf_max> setting (C<undef> disables it).
		610
		611	=cut
		612
		613	sub rbuf_max {
		614	$_[0]{rbuf_max} = $_[1];
408	}	615	}
409		616
410	#############################################################################	617	#############################################################################
411		618
412	=item $handle->timeout ($seconds)	619	=item $handle->timeout ($seconds)
…		…
425	# reset the timeout watcher, as neccessary	632	# reset the timeout watcher, as neccessary
426	# also check for time-outs	633	# also check for time-outs
427	sub _timeout {	634	sub _timeout {
428	my ($self) = @_;	635	my ($self) = @_;
429		636
430	if ($self->{timeout}) {	637	if ($self->{timeout} && $self->{fh}) {
431	my $NOW = AnyEvent->now;	638	my $NOW = AnyEvent->now;
432		639
433	# when would the timeout trigger?	640	# when would the timeout trigger?
434	my $after = $self->{_activity} + $self->{timeout} - $NOW;	641	my $after = $self->{_activity} + $self->{timeout} - $NOW;
435		642
…		…
438	$self->{_activity} = $NOW;	645	$self->{_activity} = $NOW;
439		646
440	if ($self->{on_timeout}) {	647	if ($self->{on_timeout}) {
441	$self->{on_timeout}($self);	648	$self->{on_timeout}($self);
442	} else {	649	} else {
443	$self->_error (&Errno::ETIMEDOUT);	650	$self->_error (Errno::ETIMEDOUT);
444	}	651	}
445		652
446	# callback could have changed timeout value, optimise	653	# callback could have changed timeout value, optimise
447	return unless $self->{timeout};	654	return unless $self->{timeout};
448		655
…		…
511	Scalar::Util::weaken $self;	718	Scalar::Util::weaken $self;
512		719
513	my $cb = sub {	720	my $cb = sub {
514	my $len = syswrite $self->{fh}, $self->{wbuf};	721	my $len = syswrite $self->{fh}, $self->{wbuf};
515		722
516	if ($len >= 0) {	723	if (defined $len) {
517	substr $self->{wbuf}, 0, $len, "";	724	substr $self->{wbuf}, 0, $len, "";
518		725
519	$self->{_activity} = AnyEvent->now;	726	$self->{_activity} = AnyEvent->now;
520		727
521	$self->{on_drain}($self)	728	$self->{on_drain}($self)
…		…
553	->($self, @_);	760	->($self, @_);
554	}	761	}
555		762
556	if ($self->{tls}) {	763	if ($self->{tls}) {
557	$self->{_tls_wbuf} .= $_[0];	764	$self->{_tls_wbuf} .= $_[0];
558		765	&_dotls ($self) if $self->{fh};
559	&_dotls ($self);
560	} else {	766	} else {
561	$self->{wbuf} .= $_[0];	767	$self->{wbuf} .= $_[0];
562	$self->_drain_wbuf;	768	$self->_drain_wbuf if $self->{fh};
563	}	769	}
564	}	770	}
565		771
566	=item $handle->push_write (type => @args)	772	=item $handle->push_write (type => @args)
567		773
…		…
656		862
657	pack "w/a*", Storable::nfreeze ($ref)	863	pack "w/a*", Storable::nfreeze ($ref)
658	};	864	};
659		865
660	=back	866	=back
		867
		868	=item $handle->push_shutdown
		869
		870	Sometimes you know you want to close the socket after writing your data
		871	before it was actually written. One way to do that is to replace your
		872	C<on_drain> handler by a callback that shuts down the socket (and set
		873	C<low_water_mark> to C<0>). This method is a shorthand for just that, and
		874	replaces the C<on_drain> callback with:
		875
		876	sub { shutdown $_[0]{fh}, 1 } # for push_shutdown
		877
		878	This simply shuts down the write side and signals an EOF condition to the
		879	the peer.
		880
		881	You can rely on the normal read queue and C<on_eof> handling
		882	afterwards. This is the cleanest way to close a connection.
		883
		884	=cut
		885
		886	sub push_shutdown {
		887	my ($self) = @_;
		888
		889	delete $self->{low_water_mark};
		890	$self->on_drain (sub { shutdown $_[0]{fh}, 1 });
		891	}
661		892
662	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)	893	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)
663		894
664	This function (not method) lets you add your own types to C<push_write>.	895	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	896	Whenever the given C<type> is used, C<push_write> will invoke the code
…		…
759	=cut	990	=cut
760		991
761	sub _drain_rbuf {	992	sub _drain_rbuf {
762	my ($self) = @_;	993	my ($self) = @_;
763		994
		995	# avoid recursion
		996	return if $self->{_skip_drain_rbuf};
764	local $self->{_in_drain} = 1;	997	local $self->{_skip_drain_rbuf} = 1;
765
766	if (
767	defined $self->{rbuf_max}
768	&& $self->{rbuf_max} < length $self->{rbuf}
769	) {
770	$self->_error (&Errno::ENOSPC, 1), return;
771	}
772		998
773	while () {	999	while () {
774	# we need to use a separate tls read buffer, as we must not receive data while	1000	# 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.	1001	# we are draining the buffer, and this can only happen with TLS.
776	$self->{rbuf} .= delete $self->{_tls_rbuf} if exists $self->{_tls_rbuf};	1002	$self->{rbuf} .= delete $self->{_tls_rbuf}
		1003	if exists $self->{_tls_rbuf};
777		1004
778	my $len = length $self->{rbuf};	1005	my $len = length $self->{rbuf};
779		1006
780	if (my $cb = shift @{ $self->{_queue} }) {	1007	if (my $cb = shift @{ $self->{_queue} }) {
781	unless ($cb->($self)) {	1008	unless ($cb->($self)) {
782	if ($self->{_eof}) {	1009	# no progress can be made
783	# no progress can be made (not enough data and no data forthcoming)	1010	# (not enough data and no data forthcoming)
784	$self->_error (&Errno::EPIPE, 1), return;	1011	$self->_error (Errno::EPIPE, 1), return
785	}	1012	if $self->{_eof};
786		1013
787	unshift @{ $self->{_queue} }, $cb;	1014	unshift @{ $self->{_queue} }, $cb;
788	last;	1015	last;
789	}	1016	}
790	} elsif ($self->{on_read}) {	1017	} elsif ($self->{on_read}) {
…		…
797	&& !@{ $self->{_queue} } # and the queue is still empty	1024	&& !@{ $self->{_queue} } # and the queue is still empty
798	&& $self->{on_read} # but we still have on_read	1025	&& $self->{on_read} # but we still have on_read
799	) {	1026	) {
800	# no further data will arrive	1027	# no further data will arrive
801	# so no progress can be made	1028	# so no progress can be made
802	$self->_error (&Errno::EPIPE, 1), return	1029	$self->_error (Errno::EPIPE, 1), return
803	if $self->{_eof};	1030	if $self->{_eof};
804		1031
805	last; # more data might arrive	1032	last; # more data might arrive
806	}	1033	}
807	} else {	1034	} else {
…		…
810	last;	1037	last;
811	}	1038	}
812	}	1039	}
813		1040
814	if ($self->{_eof}) {	1041	if ($self->{_eof}) {
815	if ($self->{on_eof}) {	1042	$self->{on_eof}
816	$self->{on_eof}($self)	1043	? $self->{on_eof}($self)
817	} else {	1044	: $self->_error (0, 1, "Unexpected end-of-file");
818	$self->_error (0, 1);	1045
819	}	1046	return;
		1047	}
		1048
		1049	if (
		1050	defined $self->{rbuf_max}
		1051	&& $self->{rbuf_max} < length $self->{rbuf}
		1052	) {
		1053	$self->_error (Errno::ENOSPC, 1), return;
820	}	1054	}
821		1055
822	# may need to restart read watcher	1056	# may need to restart read watcher
823	unless ($self->{_rw}) {	1057	unless ($self->{_rw}) {
824	$self->start_read	1058	$self->start_read
…		…
836		1070
837	sub on_read {	1071	sub on_read {
838	my ($self, $cb) = @_;	1072	my ($self, $cb) = @_;
839		1073
840	$self->{on_read} = $cb;	1074	$self->{on_read} = $cb;
841	$self->_drain_rbuf if $cb && !$self->{_in_drain};	1075	$self->_drain_rbuf if $cb;
842	}	1076	}
843		1077
844	=item $handle->rbuf	1078	=item $handle->rbuf
845		1079
846	Returns the read buffer (as a modifiable lvalue).	1080	Returns the read buffer (as a modifiable lvalue).
…		…
898	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")	1132	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")
899	->($self, $cb, @_);	1133	->($self, $cb, @_);
900	}	1134	}
901		1135
902	push @{ $self->{_queue} }, $cb;	1136	push @{ $self->{_queue} }, $cb;
903	$self->_drain_rbuf unless $self->{_in_drain};	1137	$self->_drain_rbuf;
904	}	1138	}
905		1139
906	sub unshift_read {	1140	sub unshift_read {
907	my $self = shift;	1141	my $self = shift;
908	my $cb = pop;	1142	my $cb = pop;
…		…
914	->($self, $cb, @_);	1148	->($self, $cb, @_);
915	}	1149	}
916		1150
917		1151
918	unshift @{ $self->{_queue} }, $cb;	1152	unshift @{ $self->{_queue} }, $cb;
919	$self->_drain_rbuf unless $self->{_in_drain};	1153	$self->_drain_rbuf;
920	}	1154	}
921		1155
922	=item $handle->push_read (type => @args, $cb)	1156	=item $handle->push_read (type => @args, $cb)
923		1157
924	=item $handle->unshift_read (type => @args, $cb)	1158	=item $handle->unshift_read (type => @args, $cb)
…		…
1057	return 1;	1291	return 1;
1058	}	1292	}
1059		1293
1060	# reject	1294	# reject
1061	if ($reject && $$rbuf =~ $reject) {	1295	if ($reject && $$rbuf =~ $reject) {
1062	$self->_error (&Errno::EBADMSG);	1296	$self->_error (Errno::EBADMSG);
1063	}	1297	}
1064		1298
1065	# skip	1299	# skip
1066	if ($skip && $$rbuf =~ $skip) {	1300	if ($skip && $$rbuf =~ $skip) {
1067	$data .= substr $$rbuf, 0, $+[0], "";	1301	$data .= substr $$rbuf, 0, $+[0], "";
…		…
1083	my ($self, $cb) = @_;	1317	my ($self, $cb) = @_;
1084		1318
1085	sub {	1319	sub {
1086	unless ($_[0]{rbuf} =~ s/^(0\|[1-9][0-9]*)://) {	1320	unless ($_[0]{rbuf} =~ s/^(0\|[1-9][0-9]*)://) {
1087	if ($_[0]{rbuf} =~ /[^0-9]/) {	1321	if ($_[0]{rbuf} =~ /[^0-9]/) {
1088	$self->_error (&Errno::EBADMSG);	1322	$self->_error (Errno::EBADMSG);
1089	}	1323	}
1090	return;	1324	return;
1091	}	1325	}
1092		1326
1093	my $len = $1;	1327	my $len = $1;
…		…
1096	my $string = $_[1];	1330	my $string = $_[1];
1097	$_[0]->unshift_read (chunk => 1, sub {	1331	$_[0]->unshift_read (chunk => 1, sub {
1098	if ($_[1] eq ",") {	1332	if ($_[1] eq ",") {
1099	$cb->($_[0], $string);	1333	$cb->($_[0], $string);
1100	} else {	1334	} else {
1101	$self->_error (&Errno::EBADMSG);	1335	$self->_error (Errno::EBADMSG);
1102	}	1336	}
1103	});	1337	});
1104	});	1338	});
1105		1339
1106	1	1340	1
…		…
1173	=cut	1407	=cut
1174		1408
1175	register_read_type json => sub {	1409	register_read_type json => sub {
1176	my ($self, $cb) = @_;	1410	my ($self, $cb) = @_;
1177		1411
1178	require JSON;	1412	my $json = $self->{json} \|\|=
		1413	eval { require JSON::XS; JSON::XS->new->utf8 }
		1414	\|\| do { require JSON; JSON->new->utf8 };
1179		1415
1180	my $data;	1416	my $data;
1181	my $rbuf = \$self->{rbuf};	1417	my $rbuf = \$self->{rbuf};
1182
1183	my $json = $self->{json} \|\|= JSON->new->utf8;
1184		1418
1185	sub {	1419	sub {
1186	my $ref = eval { $json->incr_parse ($self->{rbuf}) };	1420	my $ref = eval { $json->incr_parse ($self->{rbuf}) };
1187		1421
1188	if ($ref) {	1422	if ($ref) {
…		…
1196	$json->incr_skip;	1430	$json->incr_skip;
1197		1431
1198	$self->{rbuf} = $json->incr_text;	1432	$self->{rbuf} = $json->incr_text;
1199	$json->incr_text = "";	1433	$json->incr_text = "";
1200		1434
1201	$self->_error (&Errno::EBADMSG);	1435	$self->_error (Errno::EBADMSG);
1202		1436
1203	()	1437	()
1204	} else {	1438	} else {
1205	$self->{rbuf} = "";	1439	$self->{rbuf} = "";
1206		1440
…		…
1243	# read remaining chunk	1477	# read remaining chunk
1244	$_[0]->unshift_read (chunk => $len, sub {	1478	$_[0]->unshift_read (chunk => $len, sub {
1245	if (my $ref = eval { Storable::thaw ($_[1]) }) {	1479	if (my $ref = eval { Storable::thaw ($_[1]) }) {
1246	$cb->($_[0], $ref);	1480	$cb->($_[0], $ref);
1247	} else {	1481	} else {
1248	$self->_error (&Errno::EBADMSG);	1482	$self->_error (Errno::EBADMSG);
1249	}	1483	}
1250	});	1484	});
1251	}	1485	}
1252		1486
1253	1	1487	1
…		…
1317	if ($self->{tls}) {	1551	if ($self->{tls}) {
1318	Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf);	1552	Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf);
1319		1553
1320	&_dotls ($self);	1554	&_dotls ($self);
1321	} else {	1555	} else {
1322	$self->_drain_rbuf unless $self->{_in_drain};	1556	$self->_drain_rbuf;
1323	}	1557	}
1324		1558
1325	} elsif (defined $len) {	1559	} elsif (defined $len) {
1326	delete $self->{_rw};	1560	delete $self->{_rw};
1327	$self->{_eof} = 1;	1561	$self->{_eof} = 1;
1328	$self->_drain_rbuf unless $self->{_in_drain};	1562	$self->_drain_rbuf;
1329		1563
1330	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {	1564	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {
1331	return $self->_error ($!, 1);	1565	return $self->_error ($!, 1);
1332	}	1566	}
1333	});	1567	});
1334	}	1568	}
1335	}	1569	}
1336		1570
		1571	our $ERROR_SYSCALL;
		1572	our $ERROR_WANT_READ;
		1573
		1574	sub _tls_error {
		1575	my ($self, $err) = @_;
		1576
		1577	return $self->_error ($!, 1)
		1578	if $err == Net::SSLeay::ERROR_SYSCALL ();
		1579
		1580	my $err =Net::SSLeay::ERR_error_string (Net::SSLeay::ERR_get_error ());
		1581
		1582	# reduce error string to look less scary
		1583	$err =~ s/^error:[0-9a-fA-F]{8}:[^:]+:([^:]+):/\L$1: /;
		1584
		1585	if ($self->{_on_starttls}) {
		1586	(delete $self->{_on_starttls})->($self, undef, $err);
		1587	&_freetls;
		1588	} else {
		1589	&_freetls;
		1590	$self->_error (Errno::EPROTO, 1, $err);
		1591	}
		1592	}
		1593
1337	# poll the write BIO and send the data if applicable	1594	# poll the write BIO and send the data if applicable
		1595	# also decode read data if possible
		1596	# this is basiclaly our TLS state machine
		1597	# more efficient implementations are possible with openssl,
		1598	# but not with the buggy and incomplete Net::SSLeay.
1338	sub _dotls {	1599	sub _dotls {
1339	my ($self) = @_;	1600	my ($self) = @_;
1340		1601
1341	my $tmp;	1602	my $tmp;
1342		1603
1343	if (length $self->{_tls_wbuf}) {	1604	if (length $self->{_tls_wbuf}) {
1344	while (($tmp = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) {	1605	while (($tmp = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) {
1345	substr $self->{_tls_wbuf}, 0, $tmp, "";	1606	substr $self->{_tls_wbuf}, 0, $tmp, "";
1346	}	1607	}
		1608
		1609	$tmp = Net::SSLeay::get_error ($self->{tls}, $tmp);
		1610	return $self->_tls_error ($tmp)
		1611	if $tmp != $ERROR_WANT_READ
		1612	&& ($tmp != $ERROR_SYSCALL \|\| $!);
1347	}	1613	}
1348		1614
1349	while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) {	1615	while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) {
1350	unless (length $tmp) {	1616	unless (length $tmp) {
1351	# let's treat SSL-eof as we treat normal EOF	1617	$self->{_on_starttls}
1352	delete $self->{_rw};	1618	and (delete $self->{_on_starttls})->($self, undef, "EOF during handshake"); # ???
1353	$self->{_eof} = 1;
1354	&_freetls;	1619	&_freetls;
		1620
		1621	if ($self->{on_stoptls}) {
		1622	$self->{on_stoptls}($self);
		1623	return;
		1624	} else {
		1625	# let's treat SSL-eof as we treat normal EOF
		1626	delete $self->{_rw};
		1627	$self->{_eof} = 1;
		1628	}
1355	}	1629	}
1356		1630
1357	$self->{_tls_rbuf} .= $tmp;	1631	$self->{_tls_rbuf} .= $tmp;
1358	$self->_drain_rbuf unless $self->{_in_drain};	1632	$self->_drain_rbuf;
1359	$self->{tls} or return; # tls session might have gone away in callback	1633	$self->{tls} or return; # tls session might have gone away in callback
1360	}	1634	}
1361		1635
1362	$tmp = Net::SSLeay::get_error ($self->{tls}, -1);	1636	$tmp = Net::SSLeay::get_error ($self->{tls}, -1);
1363
1364	if ($tmp != Net::SSLeay::ERROR_WANT_READ ()) {
1365	if ($tmp == Net::SSLeay::ERROR_SYSCALL ()) {
1366	return $self->_error ($!, 1);	1637	return $self->_tls_error ($tmp)
1367	} elsif ($tmp == Net::SSLeay::ERROR_SSL ()) {	1638	if $tmp != $ERROR_WANT_READ
1368	return $self->_error (&Errno::EIO, 1);	1639	&& ($tmp != $ERROR_SYSCALL \|\| $!);
1369	}
1370
1371	# all other errors are fine for our purposes
1372	}
1373		1640
1374	while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) {	1641	while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) {
1375	$self->{wbuf} .= $tmp;	1642	$self->{wbuf} .= $tmp;
1376	$self->_drain_wbuf;	1643	$self->_drain_wbuf;
1377	}	1644	}
		1645
		1646	$self->{_on_starttls}
		1647	and Net::SSLeay::state ($self->{tls}) == Net::SSLeay::ST_OK ()
		1648	and (delete $self->{_on_starttls})->($self, 1, "TLS/SSL connection established");
1378	}	1649	}
1379		1650
1380	=item $handle->starttls ($tls[, $tls_ctx])	1651	=item $handle->starttls ($tls[, $tls_ctx])
1381		1652
1382	Instead of starting TLS negotiation immediately when the AnyEvent::Handle	1653	Instead of starting TLS negotiation immediately when the AnyEvent::Handle
1383	object is created, you can also do that at a later time by calling	1654	object is created, you can also do that at a later time by calling
1384	C<starttls>.	1655	C<starttls>.
1385		1656
		1657	Starting TLS is currently an asynchronous operation - when you push some
		1658	write data and then call C<< ->starttls >> then TLS negotiation will start
		1659	immediately, after which the queued write data is then sent.
		1660
1386	The first argument is the same as the C<tls> constructor argument (either	1661	The first argument is the same as the C<tls> constructor argument (either
1387	C<"connect">, C<"accept"> or an existing Net::SSLeay object).	1662	C<"connect">, C<"accept"> or an existing Net::SSLeay object).
1388		1663
1389	The second argument is the optional C<Net::SSLeay::CTX> object that is	1664	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.	1665	when AnyEvent::Handle has to create its own TLS connection object, or
		1666	a hash reference with C<< key => value >> pairs that will be used to
		1667	construct a new context.
1391		1668
1392	The TLS connection object will end up in C<< $handle->{tls} >> after this	1669	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	1670	context in C<< $handle->{tls_ctx} >> after this call and can be used or
1394	might have already started when this function returns.	1671	changed to your liking. Note that the handshake might have already started
		1672	when this function returns.
1395		1673
1396	If it an error to start a TLS handshake more than once per	1674	Due to bugs in OpenSSL, it might or might not be possible to do multiple
1397	AnyEvent::Handle object (this is due to bugs in OpenSSL).	1675	handshakes on the same stream. Best do not attempt to use the stream after
		1676	stopping TLS.
1398		1677
1399	=cut	1678	=cut
		1679
		1680	our %TLS_CACHE; #TODO not yet documented, should we?
1400		1681
1401	sub starttls {	1682	sub starttls {
1402	my ($self, $ssl, $ctx) = @_;	1683	my ($self, $tls, $ctx) = @_;
		1684
		1685	Carp::croak "It is an error to call starttls on an AnyEvent::Handle object while TLS is already active, caught"
		1686	if $self->{tls};
		1687
		1688	$self->{tls} = $tls;
		1689	$self->{tls_ctx} = $ctx if @_ > 2;
		1690
		1691	return unless $self->{fh};
1403		1692
1404	require Net::SSLeay;	1693	require Net::SSLeay;
1405		1694
1406	Carp::croak "it is an error to call starttls more than once on an AnyEvent::Handle object"	1695	$ERROR_SYSCALL = Net::SSLeay::ERROR_SYSCALL ();
		1696	$ERROR_WANT_READ = Net::SSLeay::ERROR_WANT_READ ();
		1697
1407	if $self->{tls};	1698	$tls = $self->{tls};
		1699	$ctx = $self->{tls_ctx};
		1700
		1701	local $Carp::CarpLevel = 1; # skip ourselves when creating a new context or session
		1702
		1703	if ("HASH" eq ref $ctx) {
		1704	require AnyEvent::TLS;
		1705
		1706	if ($ctx->{cache}) {
		1707	my $key = $ctx+0;
		1708	$ctx = $TLS_CACHE{$key} \|\|= new AnyEvent::TLS %$ctx;
		1709	} else {
		1710	$ctx = new AnyEvent::TLS %$ctx;
		1711	}
		1712	}
1408		1713
1409	if ($ssl eq "accept") {	1714	$self->{tls_ctx} = $ctx \|\| TLS_CTX ();
1410	$ssl = Net::SSLeay::new ($ctx \|\| TLS_CTX ());	1715	$self->{tls} = $tls = $self->{tls_ctx}->_get_session ($tls, $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} = $ssl;
1418		1716
1419	# basically, this is deep magic (because SSL_read should have the same issues)	1717	# basically, this is deep magic (because SSL_read should have the same issues)
1420	# but the openssl maintainers basically said: "trust us, it just works".	1718	# but the openssl maintainers basically said: "trust us, it just works".
1421	# (unfortunately, we have to hardcode constants because the abysmally misdesigned	1719	# (unfortunately, we have to hardcode constants because the abysmally misdesigned
1422	# and mismaintained ssleay-module doesn't even offer them).	1720	# and mismaintained ssleay-module doesn't even offer them).
…		…
1426	#	1724	#
1427	# note that we do not try to keep the length constant between writes as we are required to do.	1725	# note that we do not try to keep the length constant between writes as we are required to do.
1428	# we assume that most (but not all) of this insanity only applies to non-blocking cases,	1726	# we assume that most (but not all) of this insanity only applies to non-blocking cases,
1429	# and we drive openssl fully in blocking mode here. Or maybe we don't - openssl seems to	1727	# and we drive openssl fully in blocking mode here. Or maybe we don't - openssl seems to
1430	# have identity issues in that area.	1728	# have identity issues in that area.
1431	Net::SSLeay::CTX_set_mode ($self->{tls},	1729	# Net::SSLeay::CTX_set_mode ($ssl,
1432	(eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } \|\| 1)	1730	# (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } \|\| 1)
1433	\| (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } \|\| 2));	1731	# \| (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } \|\| 2));
		1732	Net::SSLeay::CTX_set_mode ($tls, 1\|2);
1434		1733
1435	$self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());	1734	$self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
1436	$self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());	1735	$self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
1437		1736
		1737	Net::SSLeay::BIO_write ($self->{_rbio}, delete $self->{rbuf});
		1738
1438	Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio});	1739	Net::SSLeay::set_bio ($tls, $self->{_rbio}, $self->{_wbio});
		1740
		1741	$self->{_on_starttls} = sub { $_[0]{on_starttls}(@_) }
		1742	if $self->{on_starttls};
1439		1743
1440	&_dotls; # need to trigger the initial handshake	1744	&_dotls; # need to trigger the initial handshake
1441	$self->start_read; # make sure we actually do read	1745	$self->start_read; # make sure we actually do read
1442	}	1746	}
1443		1747
1444	=item $handle->stoptls	1748	=item $handle->stoptls
1445		1749
1446	Shuts down the SSL connection - this makes a proper EOF handshake by	1750	Shuts down the SSL connection - this makes a proper EOF handshake by
1447	sending a close notify to the other side, but since OpenSSL doesn't	1751	sending a close notify to the other side, but since OpenSSL doesn't
1448	support non-blocking shut downs, it is not possible to re-use the stream	1752	support non-blocking shut downs, it is not guarenteed that you can re-use
1449	afterwards.	1753	the stream afterwards.
1450		1754
1451	=cut	1755	=cut
1452		1756
1453	sub stoptls {	1757	sub stoptls {
1454	my ($self) = @_;	1758	my ($self) = @_;
…		…
1456	if ($self->{tls}) {	1760	if ($self->{tls}) {
1457	Net::SSLeay::shutdown ($self->{tls});	1761	Net::SSLeay::shutdown ($self->{tls});
1458		1762
1459	&_dotls;	1763	&_dotls;
1460		1764
1461	# we don't give a shit. no, we do, but we can't. no...	1765	# # we don't give a shit. no, we do, but we can't. no...#d#
1462	# we, we... have to use openssl :/	1766	# # we, we... have to use openssl :/#d#
1463	&_freetls;	1767	# &_freetls;#d#
1464	}	1768	}
1465	}	1769	}
1466		1770
1467	sub _freetls {	1771	sub _freetls {
1468	my ($self) = @_;	1772	my ($self) = @_;
1469		1773
1470	return unless $self->{tls};	1774	return unless $self->{tls};
1471		1775
1472	Net::SSLeay::free (delete $self->{tls});	1776	$self->{tls_ctx}->_put_session (delete $self->{tls})
		1777	if $self->{tls} > 0;
1473		1778
1474	delete @$self{qw(_rbio _wbio _tls_wbuf)};	1779	delete @$self{qw(_rbio _wbio _tls_wbuf _on_starttls)};
1475	}	1780	}
1476		1781
1477	sub DESTROY {	1782	sub DESTROY {
1478	my ($self) = @_;	1783	my ($self) = @_;
1479		1784
1480	&_freetls;	1785	&_freetls;
1481		1786
1482	my $linger = exists $self->{linger} ? $self->{linger} : 3600;	1787	my $linger = exists $self->{linger} ? $self->{linger} : 3600;
1483		1788
1484	if ($linger && length $self->{wbuf}) {	1789	if ($linger && length $self->{wbuf} && $self->{fh}) {
1485	my $fh = delete $self->{fh};	1790	my $fh = delete $self->{fh};
1486	my $wbuf = delete $self->{wbuf};	1791	my $wbuf = delete $self->{wbuf};
1487		1792
1488	my @linger;	1793	my @linger;
1489		1794
…		…
1503	}	1808	}
1504		1809
1505	=item $handle->destroy	1810	=item $handle->destroy
1506		1811
1507	Shuts down the handle object as much as possible - this call ensures that	1812	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	1813	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.	1814	will be freed. Any method you will call on the handle object after
		1815	destroying it in this way will be silently ignored (and it will return the
		1816	empty list).
1510		1817
1511	Normally, you can just "forget" any references to an AnyEvent::Handle	1818	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	1819	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	1820	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	1821	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	1822	within such an callback. You I<MUST> call C<< ->destroy >> explicitly in
1516	that case.	1823	that case.
1517		1824
		1825	Destroying the handle object in this way has the advantage that callbacks
		1826	will be removed as well, so if those are the only reference holders (as
		1827	is common), then one doesn't need to do anything special to break any
		1828	reference cycles.
		1829
1518	The handle might still linger in the background and write out remaining	1830	The handle might still linger in the background and write out remaining
1519	data, as specified by the C<linger> option, however.	1831	data, as specified by the C<linger> option, however.
1520		1832
1521	=cut	1833	=cut
1522		1834
1523	sub destroy {	1835	sub destroy {
1524	my ($self) = @_;	1836	my ($self) = @_;
1525		1837
1526	$self->DESTROY;	1838	$self->DESTROY;
1527	%$self = ();	1839	%$self = ();
		1840	bless $self, "AnyEvent::Handle::destroyed";
		1841	}
		1842
		1843	sub AnyEvent::Handle::destroyed::AUTOLOAD {
		1844	#nop
1528	}	1845	}
1529		1846
1530	=item AnyEvent::Handle::TLS_CTX	1847	=item AnyEvent::Handle::TLS_CTX
1531		1848
1532	This function creates and returns the Net::SSLeay::CTX object used by	1849	This function creates and returns the AnyEvent::TLS object used by default
1533	default for TLS mode.	1850	for TLS mode.
1534		1851
1535	The context is created like this:	1852	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		1853
1545	=cut	1854	=cut
1546		1855
1547	our $TLS_CTX;	1856	our $TLS_CTX;
1548		1857
1549	sub TLS_CTX() {	1858	sub TLS_CTX() {
1550	$TLS_CTX \|\| do {	1859	$TLS_CTX \|\|= do {
1551	require Net::SSLeay;	1860	require AnyEvent::TLS;
1552		1861
1553	Net::SSLeay::load_error_strings ();	1862	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	}	1863	}
1563	}	1864	}
1564		1865
1565	=back	1866	=back
1566		1867
…		…
1605		1906
1606	$handle->on_read (sub { });	1907	$handle->on_read (sub { });
1607	$handle->on_eof (undef);	1908	$handle->on_eof (undef);
1608	$handle->on_error (sub {	1909	$handle->on_error (sub {
1609	my $data = delete $_[0]{rbuf};	1910	my $data = delete $_[0]{rbuf};
1610	undef $handle;
1611	});	1911	});
1612		1912
1613	The reason to use C<on_error> is that TCP connections, due to latencies	1913	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	1914	and packets loss, might get closed quite violently with an error, when in
1615	fact, all data has been received.	1915	fact, all data has been received.
…		…
1631	$handle->on_drain (sub {	1931	$handle->on_drain (sub {
1632	warn "all data submitted to the kernel\n";	1932	warn "all data submitted to the kernel\n";
1633	undef $handle;	1933	undef $handle;
1634	});	1934	});
1635		1935
		1936	If you just want to queue some data and then signal EOF to the other side,
		1937	consider using C<< ->push_shutdown >> instead.
		1938
		1939	=item I want to contact a TLS/SSL server, I don't care about security.
		1940
		1941	If your TLS server is a pure TLS server (e.g. HTTPS) that only speaks TLS,
		1942	simply connect to it and then create the AnyEvent::Handle with the C<tls>
		1943	parameter:
		1944
		1945	tcp_connect $host, $port, sub {
		1946	my ($fh) = @_;
		1947
		1948	my $handle = new AnyEvent::Handle
		1949	fh => $fh,
		1950	tls => "connect",
		1951	on_error => sub { ... };
		1952
		1953	$handle->push_write (...);
		1954	};
		1955
		1956	=item I want to contact a TLS/SSL server, I do care about security.
		1957
		1958	Then you should additionally enable certificate verification, including
		1959	peername verification, if the protocol you use supports it (see
		1960	L<AnyEvent::TLS>, C<verify_peername>).
		1961
		1962	E.g. for HTTPS:
		1963
		1964	tcp_connect $host, $port, sub {
		1965	my ($fh) = @_;
		1966
		1967	my $handle = new AnyEvent::Handle
		1968	fh => $fh,
		1969	peername => $host,
		1970	tls => "connect",
		1971	tls_ctx => { verify => 1, verify_peername => "https" },
		1972	...
		1973
		1974	Note that you must specify the hostname you connected to (or whatever
		1975	"peername" the protocol needs) as the C<peername> argument, otherwise no
		1976	peername verification will be done.
		1977
		1978	The above will use the system-dependent default set of trusted CA
		1979	certificates. If you want to check against a specific CA, add the
		1980	C<ca_file> (or C<ca_cert>) arguments to C<tls_ctx>:
		1981
		1982	tls_ctx => {
		1983	verify => 1,
		1984	verify_peername => "https",
		1985	ca_file => "my-ca-cert.pem",
		1986	},
		1987
		1988	=item I want to create a TLS/SSL server, how do I do that?
		1989
		1990	Well, you first need to get a server certificate and key. You have
		1991	three options: a) ask a CA (buy one, use cacert.org etc.) b) create a
		1992	self-signed certificate (cheap. check the search engine of your choice,
		1993	there are many tutorials on the net) or c) make your own CA (tinyca2 is a
		1994	nice program for that purpose).
		1995
		1996	Then create a file with your private key (in PEM format, see
		1997	L<AnyEvent::TLS>), followed by the certificate (also in PEM format). The
		1998	file should then look like this:
		1999
		2000	-----BEGIN RSA PRIVATE KEY-----
		2001	...header data
		2002	... lots of base64'y-stuff
		2003	-----END RSA PRIVATE KEY-----
		2004
		2005	-----BEGIN CERTIFICATE-----
		2006	... lots of base64'y-stuff
		2007	-----END CERTIFICATE-----
		2008
		2009	The important bits are the "PRIVATE KEY" and "CERTIFICATE" parts. Then
		2010	specify this file as C<cert_file>:
		2011
		2012	tcp_server undef, $port, sub {
		2013	my ($fh) = @_;
		2014
		2015	my $handle = new AnyEvent::Handle
		2016	fh => $fh,
		2017	tls => "accept",
		2018	tls_ctx => { cert_file => "my-server-keycert.pem" },
		2019	...
		2020
		2021	When you have intermediate CA certificates that your clients might not
		2022	know about, just append them to the C<cert_file>.
		2023
1636	=back	2024	=back
1637		2025
1638		2026
1639	=head1 SUBCLASSING AnyEvent::Handle	2027	=head1 SUBCLASSING AnyEvent::Handle
1640		2028

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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents): Revision 1.123 by root, Mon Apr 20 14:34:18 2009 UTC vs. Revision 1.173 by root, Thu Aug 6 13:45:04 2009 UTC

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Comparing AnyEvent/lib/AnyEvent/Handle.pm (file contents):
Revision 1.123 by root, Mon Apr 20 14:34:18 2009 UTC vs.
Revision 1.173 by root, Thu Aug 6 13:45:04 2009 UTC