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Revision 1.182 by root, Thu Sep 3 12:35:01 2009 UTC

1	package AnyEvent::Handle;
2
3	no warnings;
4	use strict qw(subs vars);
5
6	use AnyEvent ();
7	use AnyEvent::Util qw(WSAEWOULDBLOCK);
8	use Scalar::Util ();
9	use Carp ();
10	use Fcntl ();
11	use Errno qw(EAGAIN EINTR);
12
13	=head1 NAME	1	=head1 NAME
14		2
15	AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent	3	AnyEvent::Handle - non-blocking I/O on file handles via AnyEvent
16
17	=cut
18
19	our $VERSION = 4.42;
20		4
21	=head1 SYNOPSIS	5	=head1 SYNOPSIS
22		6
23	use AnyEvent;	7	use AnyEvent;
24	use AnyEvent::Handle;	8	use AnyEvent::Handle;
25		9
26	my $cv = AnyEvent->condvar;	10	my $cv = AnyEvent->condvar;
27		11
28	my $handle =	12	my $hdl; $hdl = new AnyEvent::Handle
29	AnyEvent::Handle->new (
30	fh => \*STDIN,	13	fh => \*STDIN,
31	on_eof => sub {	14	on_error => sub {
		15	my ($hdl, $fatal, $msg) = @_;
		16	warn "got error $msg\n";
		17	$hdl->destroy;
32	$cv->send;	18	$cv->send;
33	},
34	);	19	);
35		20
36	# send some request line	21	# send some request line
37	$handle->push_write ("getinfo\015\012");	22	$hdl->push_write ("getinfo\015\012");
38		23
39	# read the response line	24	# read the response line
40	$handle->push_read (line => sub {	25	$hdl->push_read (line => sub {
41	my ($handle, $line) = @_;	26	my ($hdl, $line) = @_;
42	warn "read line <$line>\n";	27	warn "got line <$line>\n";
43	$cv->send;	28	$cv->send;
44	});	29	});
45		30
46	$cv->recv;	31	$cv->recv;
47		32
48	=head1 DESCRIPTION	33	=head1 DESCRIPTION
49		34
50	This module is a helper module to make it easier to do event-based I/O on	35	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	36	filehandles.
52	on sockets see L<AnyEvent::Util>.
53		37
54	The L<AnyEvent::Intro> tutorial contains some well-documented	38	The L<AnyEvent::Intro> tutorial contains some well-documented
55	AnyEvent::Handle examples.	39	AnyEvent::Handle examples.
56		40
57	In the following, when the documentation refers to of "bytes" then this	41	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	42	means characters. As sysread and syswrite are used for all I/O, their
59	treatment of characters applies to this module as well.	43	treatment of characters applies to this module as well.
60		44
		45	At the very minimum, you should specify C<fh> or C<connect>, and the
		46	C<on_error> callback.
		47
61	All callbacks will be invoked with the handle object as their first	48	All callbacks will be invoked with the handle object as their first
62	argument.	49	argument.
63		50
		51	=cut
		52
		53	package AnyEvent::Handle;
		54
		55	use Scalar::Util ();
		56	use List::Util ();
		57	use Carp ();
		58	use Errno qw(EAGAIN EINTR);
		59
		60	use AnyEvent (); BEGIN { AnyEvent::common_sense }
		61	use AnyEvent::Util qw(WSAEWOULDBLOCK);
		62
		63	our $VERSION = $AnyEvent::VERSION;
		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 => $filehandle [C<fh> or C<connect> MANDATORY]
75		76
76	The filehandle this L<AnyEvent::Handle> object will operate on.	77	The filehandle this L<AnyEvent::Handle> object will operate on.
77
78	NOTE: The filehandle will be set to non-blocking mode (using	78	NOTE: The filehandle will be set to non-blocking mode (using
79	C<AnyEvent::Util::fh_nonblocking>) by the constructor and needs to stay in	79	C<AnyEvent::Util::fh_nonblocking>) by the constructor and needs to stay in
80	that mode.	80	that mode.
81		81
		82	=item connect => [$host, $service] [C<fh> or C<connect> MANDATORY]
		83
		84	Try to connect to the specified host and service (port), using
		85	C<AnyEvent::Socket::tcp_connect>. The C<$host> additionally becomes the
		86	default C<peername>.
		87
		88	You have to specify either this parameter, or C<fh>, above.
		89
		90	It is possible to push requests on the read and write queues, and modify
		91	properties of the stream, even while AnyEvent::Handle is connecting.
		92
		93	When this parameter is specified, then the C<on_prepare>,
		94	C<on_connect_error> and C<on_connect> callbacks will be called under the
		95	appropriate circumstances:
		96
		97	=over 4
		98
		99	=item on_prepare => $cb->($handle)
		100
		101	This (rarely used) callback is called before a new connection is
		102	attempted, but after the file handle has been created. It could be used to
		103	prepare the file handle with parameters required for the actual connect
		104	(as opposed to settings that can be changed when the connection is already
		105	established).
		106
		107	The return value of this callback should be the connect timeout value in
		108	seconds (or C<0>, or C<undef>, or the empty list, to indicate the default
		109	timeout is to be used).
		110
		111	=item on_connect => $cb->($handle, $host, $port, $retry->())
		112
		113	This callback is called when a connection has been successfully established.
		114
		115	The actual numeric host and port (the socket peername) are passed as
		116	parameters, together with a retry callback.
		117
		118	When, for some reason, the handle is not acceptable, then calling
		119	C<$retry> will continue with the next conenction target (in case of
		120	multi-homed hosts or SRV records there can be multiple connection
		121	endpoints). When it is called then the read and write queues, eof status,
		122	tls status and similar properties of the handle are being reset.
		123
		124	In most cases, ignoring the C<$retry> parameter is the way to go.
		125
		126	=item on_connect_error => $cb->($handle, $message)
		127
		128	This callback is called when the conenction could not be
		129	established. C<$!> will contain the relevant error code, and C<$message> a
		130	message describing it (usually the same as C<"$!">).
		131
		132	If this callback isn't specified, then C<on_error> will be called with a
		133	fatal error instead.
		134
		135	=back
		136
		137	=item on_error => $cb->($handle, $fatal, $message)
		138
		139	This is the error callback, which is called when, well, some error
		140	occured, such as not being able to resolve the hostname, failure to
		141	connect or a read error.
		142
		143	Some errors are fatal (which is indicated by C<$fatal> being true). On
		144	fatal errors the handle object will be destroyed (by a call to C<< ->
		145	destroy >>) after invoking the error callback (which means you are free to
		146	examine the handle object). Examples of fatal errors are an EOF condition
		147	with active (but unsatisifable) read watchers (C<EPIPE>) or I/O errors. In
		148	cases where the other side can close the connection at their will it is
		149	often easiest to not report C<EPIPE> errors in this callback.
		150
		151	AnyEvent::Handle tries to find an appropriate error code for you to check
		152	against, but in some cases (TLS errors), this does not work well. It is
		153	recommended to always output the C<$message> argument in human-readable
		154	error messages (it's usually the same as C<"$!">).
		155
		156	Non-fatal errors can be retried by simply returning, but it is recommended
		157	to simply ignore this parameter and instead abondon the handle object
		158	when this callback is invoked. Examples of non-fatal errors are timeouts
		159	C<ETIMEDOUT>) or badly-formatted data (C<EBADMSG>).
		160
		161	On callback entrance, the value of C<$!> contains the operating system
		162	error code (or C<ENOSPC>, C<EPIPE>, C<ETIMEDOUT>, C<EBADMSG> or
		163	C<EPROTO>).
		164
		165	While not mandatory, it is I<highly> recommended to set this callback, as
		166	you will not be notified of errors otherwise. The default simply calls
		167	C<croak>.
		168
		169	=item on_read => $cb->($handle)
		170
		171	This sets the default read callback, which is called when data arrives
		172	and no read request is in the queue (unlike read queue callbacks, this
		173	callback will only be called when at least one octet of data is in the
		174	read buffer).
		175
		176	To access (and remove data from) the read buffer, use the C<< ->rbuf >>
		177	method or access the C<< $handle->{rbuf} >> member directly. Note that you
		178	must not enlarge or modify the read buffer, you can only remove data at
		179	the beginning from it.
		180
		181	When an EOF condition is detected then AnyEvent::Handle will first try to
		182	feed all the remaining data to the queued callbacks and C<on_read> before
		183	calling the C<on_eof> callback. If no progress can be made, then a fatal
		184	error will be raised (with C<$!> set to C<EPIPE>).
		185
		186	Note that, unlike requests in the read queue, an C<on_read> callback
		187	doesn't mean you I<require> some data: if there is an EOF and there
		188	are outstanding read requests then an error will be flagged. With an
		189	C<on_read> callback, the C<on_eof> callback will be invoked.
		190
82	=item on_eof => $cb->($handle)	191	=item on_eof => $cb->($handle)
83		192
84	Set the callback to be called when an end-of-file condition is detected,	193	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	194	i.e. in the case of a socket, when the other side has closed the
86	connection cleanly.	195	connection cleanly, and there are no outstanding read requests in the
		196	queue (if there are read requests, then an EOF counts as an unexpected
		197	connection close and will be flagged as an error).
87		198
88	For sockets, this just means that the other side has stopped sending data,	199	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	200	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	201	callback and continue writing data, as only the read part has been shut
91	down.	202	down.
92		203
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	204	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<$!> set to <0>.	205	set, then a fatal error will be raised with C<$!> 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		206
141	=item on_drain => $cb->($handle)	207	=item on_drain => $cb->($handle)
142		208
143	This sets the callback that is called when the write buffer becomes empty	209	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).	210	(or when the callback is set and the buffer is empty already).
…		…
151	memory and push it into the queue, but instead only read more data from	217	memory and push it into the queue, but instead only read more data from
152	the file when the write queue becomes empty.	218	the file when the write queue becomes empty.
153		219
154	=item timeout => $fractional_seconds	220	=item timeout => $fractional_seconds
155		221
		222	=item rtimeout => $fractional_seconds
		223
		224	=item wtimeout => $fractional_seconds
		225
156	If non-zero, then this enables an "inactivity" timeout: whenever this many	226	If non-zero, then these enables an "inactivity" timeout: whenever this
157	seconds pass without a successful read or write on the underlying file	227	many seconds pass without a successful read or write on the underlying
158	handle, the C<on_timeout> callback will be invoked (and if that one is	228	file handle (or a call to C<timeout_reset>), the C<on_timeout> callback
159	missing, a non-fatal C<ETIMEDOUT> error will be raised).	229	will be invoked (and if that one is missing, a non-fatal C<ETIMEDOUT>
		230	error will be raised).
		231
		232	There are three variants of the timeouts that work fully independent
		233	of each other, for both read and write, just read, and just write:
		234	C<timeout>, C<rtimeout> and C<wtimeout>, with corresponding callbacks
		235	C<on_timeout>, C<on_rtimeout> and C<on_wtimeout>, and reset functions
		236	C<timeout_reset>, C<rtimeout_reset>, and C<wtimeout_reset>.
160		237
161	Note that timeout processing is also active when you currently do not have	238	Note that timeout processing is also active when you currently do not have
162	any outstanding read or write requests: If you plan to keep the connection	239	any outstanding read or write requests: If you plan to keep the connection
163	idle then you should disable the timout temporarily or ignore the timeout	240	idle then you should disable the timout temporarily or ignore the timeout
164	in the C<on_timeout> callback, in which case AnyEvent::Handle will simply	241	in the C<on_timeout> callback, in which case AnyEvent::Handle will simply
…		…
208	accomplishd by setting this option to a true value.	285	accomplishd by setting this option to a true value.
209		286
210	The default is your opertaing system's default behaviour (most likely	287	The default is your opertaing system's default behaviour (most likely
211	enabled), this option explicitly enables or disables it, if possible.	288	enabled), this option explicitly enables or disables it, if possible.
212		289
		290	=item keepalive => <boolean>
		291
		292	Enables (default disable) the SO_KEEPALIVE option on the stream socket:
		293	normally, TCP connections have no time-out once established, so TCP
		294	conenctions, once established, can stay alive forever even when the other
		295	side has long gone. TCP keepalives are a cheap way to take down long-lived
		296	TCP connections whent he other side becomes unreachable. While the default
		297	is OS-dependent, TCP keepalives usually kick in after around two hours,
		298	and, if the other side doesn't reply, take down the TCP connection some 10
		299	to 15 minutes later.
		300
		301	It is harmless to specify this option for file handles that do not support
		302	keepalives, and enabling it on connections that are potentially long-lived
		303	is usually a good idea.
		304
		305	=item oobinline => <boolean>
		306
		307	BSD majorly fucked up the implementation of TCP urgent data. The result
		308	is that almost no OS implements TCP according to the specs, and every OS
		309	implements it slightly differently.
		310
		311	If you want to handle TCP urgent data, then setting this flag gives you
		312	the most portable way of getting urgent data, by putting it into the
		313	stream.
		314
213	=item read_size => <bytes>	315	=item read_size => <bytes>
214		316
215	The default read block size (the amount of bytes this module will	317	The default read block size (the amount of bytes this module will
216	try to read during each loop iteration, which affects memory	318	try to read during each loop iteration, which affects memory
217	requirements). Default: C<8192>.	319	requirements). Default: C<8192>.
…		…
237		339
238	This will not work for partial TLS data that could not be encoded	340	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	341	yet. This data will be lost. Calling the C<stoptls> method in time might
240	help.	342	help.
241		343
		344	=item peername => $string
		345
		346	A string used to identify the remote site - usually the DNS hostname
		347	(I<not> IDN!) used to create the connection, rarely the IP address.
		348
		349	Apart from being useful in error messages, this string is also used in TLS
		350	peername verification (see C<verify_peername> in L<AnyEvent::TLS>). This
		351	verification will be skipped when C<peername> is not specified or
		352	C<undef>.
		353
242	=item tls => "accept" | "connect" | Net::SSLeay::SSL object	354	=item tls => "accept" | "connect" | Net::SSLeay::SSL object
243		355
244	When this parameter is given, it enables TLS (SSL) mode, that means	356	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	357	AnyEvent will start a TLS handshake as soon as the conenction has been
246	established and will transparently encrypt/decrypt data afterwards.	358	established and will transparently encrypt/decrypt data afterwards.
		359
		360	All TLS protocol errors will be signalled as C<EPROTO>, with an
		361	appropriate error message.
247		362
248	TLS mode requires Net::SSLeay to be installed (it will be loaded	363	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	364	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	365	have a dependency on that module, so if your module requires it, you have
251	to add the dependency yourself.	366	to add the dependency yourself.
…		…
255	mode.	370	mode.
256		371
257	You can also provide your own TLS connection object, but you have	372	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>	373	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	374	or C<Net::SSLeay::set_accept_state> on it before you pass it to
260	AnyEvent::Handle.	375	AnyEvent::Handle. Also, this module will take ownership of this connection
		376	object.
		377
		378	At some future point, AnyEvent::Handle might switch to another TLS
		379	implementation, then the option to use your own session object will go
		380	away.
261		381
262	B<IMPORTANT:> since Net::SSLeay "objects" are really only integers,	382	B<IMPORTANT:> since Net::SSLeay "objects" are really only integers,
263	passing in the wrong integer will lead to certain crash. This most often	383	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	384	happens when one uses a stylish C<< tls => 1 >> and is surprised about the
265	segmentation fault.	385	segmentation fault.
266		386
267	See the C<< ->starttls >> method for when need to start TLS negotiation later.	387	See the C<< ->starttls >> method for when need to start TLS negotiation later.
268		388
269	=item tls_ctx => $ssl_ctx	389	=item tls_ctx => $anyevent_tls
270		390
271	Use the given C<Net::SSLeay::CTX> object to create the new TLS connection	391	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	392	(unless a connection object was specified directly). If this parameter is
273	missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>.	393	missing, then AnyEvent::Handle will use C<AnyEvent::Handle::TLS_CTX>.
		394
		395	Instead of an object, you can also specify a hash reference with C<< key
		396	=> value >> pairs. Those will be passed to L<AnyEvent::TLS> to create a
		397	new TLS context object.
		398
		399	=item on_starttls => $cb->($handle, $success[, $error_message])
		400
		401	This callback will be invoked when the TLS/SSL handshake has finished. If
		402	C<$success> is true, then the TLS handshake succeeded, otherwise it failed
		403	(C<on_stoptls> will not be called in this case).
		404
		405	The session in C<< $handle->{tls} >> can still be examined in this
		406	callback, even when the handshake was not successful.
		407
		408	TLS handshake failures will not cause C<on_error> to be invoked when this
		409	callback is in effect, instead, the error message will be passed to C<on_starttls>.
		410
		411	Without this callback, handshake failures lead to C<on_error> being
		412	called, as normal.
		413
		414	Note that you cannot call C<starttls> right again in this callback. If you
		415	need to do that, start an zero-second timer instead whose callback can
		416	then call C<< ->starttls >> again.
		417
		418	=item on_stoptls => $cb->($handle)
		419
		420	When a SSLv3/TLS shutdown/close notify/EOF is detected and this callback is
		421	set, then it will be invoked after freeing the TLS session. If it is not,
		422	then a TLS shutdown condition will be treated like a normal EOF condition
		423	on the handle.
		424
		425	The session in C<< $handle->{tls} >> can still be examined in this
		426	callback.
		427
		428	This callback will only be called on TLS shutdowns, not when the
		429	underlying handle signals EOF.
274		430
275	=item json => JSON or JSON::XS object	431	=item json => JSON or JSON::XS object
276		432
277	This is the json coder object used by the C<json> read and write types.	433	This is the json coder object used by the C<json> read and write types.
278		434
…		…
287		443
288	=cut	444	=cut
289		445
290	sub new {	446	sub new {
291	my $class = shift;	447	my $class = shift;
292
293	my $self = bless { @_ }, $class;	448	my $self = bless { @_ }, $class;
294		449
295	$self->{fh} or Carp::croak "mandatory argument fh is missing";	450	if ($self->{fh}) {
		451	$self->_start;
		452	return unless $self->{fh}; # could be gone by now
		453
		454	} elsif ($self->{connect}) {
		455	require AnyEvent::Socket;
		456
		457	$self->{peername} = $self->{connect}[0]
		458	unless exists $self->{peername};
		459
		460	$self->{_skip_drain_rbuf} = 1;
		461
		462	{
		463	Scalar::Util::weaken (my $self = $self);
		464
		465	$self->{_connect} =
		466	AnyEvent::Socket::tcp_connect (
		467	$self->{connect}[0],
		468	$self->{connect}[1],
		469	sub {
		470	my ($fh, $host, $port, $retry) = @_;
		471
		472	if ($fh) {
		473	$self->{fh} = $fh;
		474
		475	delete $self->{_skip_drain_rbuf};
		476	$self->_start;
		477
		478	$self->{on_connect}
		479	and $self->{on_connect}($self, $host, $port, sub {
		480	delete @$self{qw(fh _tw _rtw _wtw _ww _rw _eof _queue rbuf _wbuf tls _tls_rbuf _tls_wbuf)};
		481	$self->{_skip_drain_rbuf} = 1;
		482	&$retry;
		483	});
		484
		485	} else {
		486	if ($self->{on_connect_error}) {
		487	$self->{on_connect_error}($self, "$!");
		488	$self->destroy;
		489	} else {
		490	$self->_error ($!, 1);
		491	}
		492	}
		493	},
		494	sub {
		495	local $self->{fh} = $_[0];
		496
		497	$self->{on_prepare}
		498	? $self->{on_prepare}->($self)
		499	: ()
		500	}
		501	);
		502	}
		503
		504	} else {
		505	Carp::croak "AnyEvent::Handle: either an existing fh or the connect parameter must be specified";
		506	}
		507
		508	$self
		509	}
		510
		511	sub _start {
		512	my ($self) = @_;
296		513
297	AnyEvent::Util::fh_nonblocking $self->{fh}, 1;	514	AnyEvent::Util::fh_nonblocking $self->{fh}, 1;
298		515
		516	$self->{_activity} =
		517	$self->{_ractivity} =
		518	$self->{_wactivity} = AE::now;
		519
		520	$self->timeout (delete $self->{timeout} ) if $self->{timeout};
		521	$self->rtimeout (delete $self->{rtimeout} ) if $self->{rtimeout};
		522	$self->wtimeout (delete $self->{wtimeout} ) if $self->{wtimeout};
		523
		524	$self->no_delay (delete $self->{no_delay} ) if exists $self->{no_delay};
		525	$self->keepalive (delete $self->{keepalive}) if exists $self->{keepalive};
		526	$self->oobinline (delete $self->{oobinline}) if exists $self->{oobinline};
		527
299	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx})	528	$self->starttls (delete $self->{tls}, delete $self->{tls_ctx})
300	if $self->{tls};	529	if $self->{tls};
301		530
302	$self->{_activity} = AnyEvent->now;
303	$self->_timeout;
304
305	$self->on_drain (delete $self->{on_drain}) if exists $self->{on_drain};	531	$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		532
308	$self->start_read	533	$self->start_read
309	if $self->{on_read};	534	if $self->{on_read} || @{ $self->{_queue} };
310		535
311	$self	536	$self->_drain_wbuf;
312	}
313
314	sub _shutdown {
315	my ($self) = @_;
316
317	delete @$self{qw(_tw _rw _ww fh rbuf wbuf on_read _queue)};
318
319	&_freetls;
320	}	537	}
321		538
322	sub _error {	539	sub _error {
323	my ($self, $errno, $fatal) = @_;	540	my ($self, $errno, $fatal, $message) = @_;
324
325	$self->_shutdown
326	if $fatal;
327		541
328	$! = $errno;	542	$! = $errno;
		543	$message ||= "$!";
329		544
330	if ($self->{on_error}) {	545	if ($self->{on_error}) {
331	$self->{on_error}($self, $fatal);	546	$self->{on_error}($self, $fatal, $message);
		547	$self->destroy if $fatal;
332	} elsif ($self->{fh}) {	548	} elsif ($self->{fh}) {
		549	$self->destroy;
333	Carp::croak "AnyEvent::Handle uncaught error: $!";	550	Carp::croak "AnyEvent::Handle uncaught error: $message";
334	}	551	}
335	}	552	}
336		553
337	=item $fh = $handle->fh	554	=item $fh = $handle->fh
338		555
…		…
362	$_[0]{on_eof} = $_[1];	579	$_[0]{on_eof} = $_[1];
363	}	580	}
364		581
365	=item $handle->on_timeout ($cb)	582	=item $handle->on_timeout ($cb)
366		583
367	Replace the current C<on_timeout> callback, or disables the callback (but	584	=item $handle->on_rtimeout ($cb)
368	not the timeout) if C<$cb> = C<undef>. See the C<timeout> constructor
369	argument and method.
370		585
371	=cut	586	=item $handle->on_wtimeout ($cb)
372		587
373	sub on_timeout {	588	Replace the current C<on_timeout>, C<on_rtimeout> or C<on_wtimeout>
374	$_[0]{on_timeout} = $_[1];	589	callback, or disables the callback (but not the timeout) if C<$cb> =
375	}	590	C<undef>. See the C<timeout> constructor argument and method.
		591
		592	=cut
		593
		594	# see below
376		595
377	=item $handle->autocork ($boolean)	596	=item $handle->autocork ($boolean)
378		597
379	Enables or disables the current autocork behaviour (see C<autocork>	598	Enables or disables the current autocork behaviour (see C<autocork>
380	constructor argument). Changes will only take effect on the next write.	599	constructor argument). Changes will only take effect on the next write.
…		…
395	sub no_delay {	614	sub no_delay {
396	$_[0]{no_delay} = $_[1];	615	$_[0]{no_delay} = $_[1];
397		616
398	eval {	617	eval {
399	local $SIG{__DIE__};	618	local $SIG{__DIE__};
400	setsockopt $_[0]{fh}, &Socket::IPPROTO_TCP, &Socket::TCP_NODELAY, int $_[1];	619	setsockopt $_[0]{fh}, Socket::IPPROTO_TCP (), Socket::TCP_NODELAY (), int $_[1]
		620	if $_[0]{fh};
401	};	621	};
402	}	622	}
403		623
		624	=item $handle->keepalive ($boolean)
		625
		626	Enables or disables the C<keepalive> setting (see constructor argument of
		627	the same name for details).
		628
		629	=cut
		630
		631	sub keepalive {
		632	$_[0]{keepalive} = $_[1];
		633
		634	eval {
		635	local $SIG{__DIE__};
		636	setsockopt $_[0]{fh}, Socket::SOL_SOCKET (), Socket::SO_KEEPALIVE (), int $_[1]
		637	if $_[0]{fh};
		638	};
		639	}
		640
		641	=item $handle->oobinline ($boolean)
		642
		643	Enables or disables the C<oobinline> setting (see constructor argument of
		644	the same name for details).
		645
		646	=cut
		647
		648	sub oobinline {
		649	$_[0]{oobinline} = $_[1];
		650
		651	eval {
		652	local $SIG{__DIE__};
		653	setsockopt $_[0]{fh}, Socket::SOL_SOCKET (), Socket::SO_OOBINLINE (), int $_[1]
		654	if $_[0]{fh};
		655	};
		656	}
		657
		658	=item $handle->keepalive ($boolean)
		659
		660	Enables or disables the C<keepalive> setting (see constructor argument of
		661	the same name for details).
		662
		663	=cut
		664
		665	sub keepalive {
		666	$_[0]{keepalive} = $_[1];
		667
		668	eval {
		669	local $SIG{__DIE__};
		670	setsockopt $_[0]{fh}, Socket::SOL_SOCKET (), Socket::SO_KEEPALIVE (), int $_[1]
		671	if $_[0]{fh};
		672	};
		673	}
		674
		675	=item $handle->on_starttls ($cb)
		676
		677	Replace the current C<on_starttls> callback (see the C<on_starttls> constructor argument).
		678
		679	=cut
		680
		681	sub on_starttls {
		682	$_[0]{on_starttls} = $_[1];
		683	}
		684
		685	=item $handle->on_stoptls ($cb)
		686
		687	Replace the current C<on_stoptls> callback (see the C<on_stoptls> constructor argument).
		688
		689	=cut
		690
		691	sub on_starttls {
		692	$_[0]{on_stoptls} = $_[1];
		693	}
		694
		695	=item $handle->rbuf_max ($max_octets)
		696
		697	Configures the C<rbuf_max> setting (C<undef> disables it).
		698
		699	=cut
		700
		701	sub rbuf_max {
		702	$_[0]{rbuf_max} = $_[1];
		703	}
		704
404	#############################################################################	705	#############################################################################
405		706
406	=item $handle->timeout ($seconds)	707	=item $handle->timeout ($seconds)
407		708
		709	=item $handle->rtimeout ($seconds)
		710
		711	=item $handle->wtimeout ($seconds)
		712
408	Configures (or disables) the inactivity timeout.	713	Configures (or disables) the inactivity timeout.
409		714
410	=cut	715	=item $handle->timeout_reset
411		716
412	sub timeout {	717	=item $handle->rtimeout_reset
		718
		719	=item $handle->wtimeout_reset
		720
		721	Reset the activity timeout, as if data was received or sent.
		722
		723	These methods are cheap to call.
		724
		725	=cut
		726
		727	for my $dir ("", "r", "w") {
		728	my $timeout = "${dir}timeout";
		729	my $tw = "_${dir}tw";
		730	my $on_timeout = "on_${dir}timeout";
		731	my $activity = "_${dir}activity";
		732	my $cb;
		733
		734	*$on_timeout = sub {
		735	$_[0]{$on_timeout} = $_[1];
		736	};
		737
		738	*$timeout = sub {
413	my ($self, $timeout) = @_;	739	my ($self, $new_value) = @_;
414		740
415	$self->{timeout} = $timeout;	741	$self->{$timeout} = $new_value;
416	$self->_timeout;	742	delete $self->{$tw}; &$cb;
417	}	743	};
418		744
		745	*{"${dir}timeout_reset"} = sub {
		746	$_[0]{$activity} = AE::now;
		747	};
		748
		749	# main workhorse:
419	# reset the timeout watcher, as neccessary	750	# reset the timeout watcher, as neccessary
420	# also check for time-outs	751	# also check for time-outs
421	sub _timeout {	752	$cb = sub {
422	my ($self) = @_;	753	my ($self) = @_;
423		754
424	if ($self->{timeout}) {	755	if ($self->{$timeout} && $self->{fh}) {
425	my $NOW = AnyEvent->now;	756	my $NOW = AE::now;
426		757
427	# when would the timeout trigger?	758	# when would the timeout trigger?
428	my $after = $self->{_activity} + $self->{timeout} - $NOW;	759	my $after = $self->{$activity} + $self->{$timeout} - $NOW;
429		760
430	# now or in the past already?	761	# now or in the past already?
431	if ($after <= 0) {	762	if ($after <= 0) {
432	$self->{_activity} = $NOW;	763	$self->{$activity} = $NOW;
433		764
434	if ($self->{on_timeout}) {	765	if ($self->{$on_timeout}) {
435	$self->{on_timeout}($self);	766	$self->{$on_timeout}($self);
436	} else {	767	} else {
437	$self->_error (&Errno::ETIMEDOUT);	768	$self->_error (Errno::ETIMEDOUT);
		769	}
		770
		771	# callback could have changed timeout value, optimise
		772	return unless $self->{$timeout};
		773
		774	# calculate new after
		775	$after = $self->{$timeout};
438	}	776	}
439		777
440	# callback could have changed timeout value, optimise	778	Scalar::Util::weaken $self;
441	return unless $self->{timeout};	779	return unless $self; # ->error could have destroyed $self
442		780
443	# calculate new after	781	$self->{$tw} ||= AE::timer $after, 0, sub {
444	$after = $self->{timeout};	782	delete $self->{$tw};
		783	$cb->($self);
		784	};
		785	} else {
		786	delete $self->{$tw};
445	}	787	}
446
447	Scalar::Util::weaken $self;
448	return unless $self; # ->error could have destroyed $self
449
450	$self->{_tw} ||= AnyEvent->timer (after => $after, cb => sub {
451	delete $self->{_tw};
452	$self->_timeout;
453	});
454	} else {
455	delete $self->{_tw};
456	}	788	}
457	}	789	}
458		790
459	#############################################################################	791	#############################################################################
460		792
…		…
505	Scalar::Util::weaken $self;	837	Scalar::Util::weaken $self;
506		838
507	my $cb = sub {	839	my $cb = sub {
508	my $len = syswrite $self->{fh}, $self->{wbuf};	840	my $len = syswrite $self->{fh}, $self->{wbuf};
509		841
510	if ($len >= 0) {	842	if (defined $len) {
511	substr $self->{wbuf}, 0, $len, "";	843	substr $self->{wbuf}, 0, $len, "";
512		844
513	$self->{_activity} = AnyEvent->now;	845	$self->{_activity} = $self->{_wactivity} = AE::now;
514		846
515	$self->{on_drain}($self)	847	$self->{on_drain}($self)
516	if $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf})	848	if $self->{low_water_mark} >= (length $self->{wbuf}) + (length $self->{_tls_wbuf})
517	&& $self->{on_drain};	849	&& $self->{on_drain};
518		850
…		…
524		856
525	# try to write data immediately	857	# try to write data immediately
526	$cb->() unless $self->{autocork};	858	$cb->() unless $self->{autocork};
527		859
528	# if still data left in wbuf, we need to poll	860	# if still data left in wbuf, we need to poll
529	$self->{_ww} = AnyEvent->io (fh => $self->{fh}, poll => "w", cb => $cb)	861	$self->{_ww} = AE::io $self->{fh}, 1, $cb
530	if length $self->{wbuf};	862	if length $self->{wbuf};
531	};	863	};
532	}	864	}
533		865
534	our %WH;	866	our %WH;
…		…
547	->($self, @_);	879	->($self, @_);
548	}	880	}
549		881
550	if ($self->{tls}) {	882	if ($self->{tls}) {
551	$self->{_tls_wbuf} .= $_[0];	883	$self->{_tls_wbuf} .= $_[0];
552		884	&_dotls ($self) if $self->{fh};
553	&_dotls ($self);
554	} else {	885	} else {
555	$self->{wbuf} .= $_[0];	886	$self->{wbuf} .= $_[0];
556	$self->_drain_wbuf;	887	$self->_drain_wbuf if $self->{fh};
557	}	888	}
558	}	889	}
559		890
560	=item $handle->push_write (type => @args)	891	=item $handle->push_write (type => @args)
561		892
…		…
625	Other languages could read single lines terminated by a newline and pass	956	Other languages could read single lines terminated by a newline and pass
626	this line into their JSON decoder of choice.	957	this line into their JSON decoder of choice.
627		958
628	=cut	959	=cut
629		960
		961	sub json_coder() {
		962	eval { require JSON::XS; JSON::XS->new->utf8 }
		963	|| do { require JSON; JSON->new->utf8 }
		964	}
		965
630	register_write_type json => sub {	966	register_write_type json => sub {
631	my ($self, $ref) = @_;	967	my ($self, $ref) = @_;
632		968
633	require JSON;	969	my $json = $self->{json} ||= json_coder;
634		970
635	$self->{json} ? $self->{json}->encode ($ref)	971	$json->encode ($ref)
636	: JSON::encode_json ($ref)
637	};	972	};
638		973
639	=item storable => $reference	974	=item storable => $reference
640		975
641	Freezes the given reference using L<Storable> and writes it to the	976	Freezes the given reference using L<Storable> and writes it to the
…		…
650		985
651	pack "w/a*", Storable::nfreeze ($ref)	986	pack "w/a*", Storable::nfreeze ($ref)
652	};	987	};
653		988
654	=back	989	=back
		990
		991	=item $handle->push_shutdown
		992
		993	Sometimes you know you want to close the socket after writing your data
		994	before it was actually written. One way to do that is to replace your
		995	C<on_drain> handler by a callback that shuts down the socket (and set
		996	C<low_water_mark> to C<0>). This method is a shorthand for just that, and
		997	replaces the C<on_drain> callback with:
		998
		999	sub { shutdown $_[0]{fh}, 1 } # for push_shutdown
		1000
		1001	This simply shuts down the write side and signals an EOF condition to the
		1002	the peer.
		1003
		1004	You can rely on the normal read queue and C<on_eof> handling
		1005	afterwards. This is the cleanest way to close a connection.
		1006
		1007	=cut
		1008
		1009	sub push_shutdown {
		1010	my ($self) = @_;
		1011
		1012	delete $self->{low_water_mark};
		1013	$self->on_drain (sub { shutdown $_[0]{fh}, 1 });
		1014	}
655		1015
656	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)	1016	=item AnyEvent::Handle::register_write_type type => $coderef->($handle, @args)
657		1017
658	This function (not method) lets you add your own types to C<push_write>.	1018	This function (not method) lets you add your own types to C<push_write>.
659	Whenever the given C<type> is used, C<push_write> will invoke the code	1019	Whenever the given C<type> is used, C<push_write> will invoke the code
…		…
753	=cut	1113	=cut
754		1114
755	sub _drain_rbuf {	1115	sub _drain_rbuf {
756	my ($self) = @_;	1116	my ($self) = @_;
757		1117
		1118	# avoid recursion
		1119	return if $self->{_skip_drain_rbuf};
758	local $self->{_in_drain} = 1;	1120	local $self->{_skip_drain_rbuf} = 1;
759
760	if (
761	defined $self->{rbuf_max}
762	&& $self->{rbuf_max} < length $self->{rbuf}
763	) {
764	$self->_error (&Errno::ENOSPC, 1), return;
765	}
766		1121
767	while () {	1122	while () {
768	# we need to use a separate tls read buffer, as we must not receive data while	1123	# we need to use a separate tls read buffer, as we must not receive data while
769	# we are draining the buffer, and this can only happen with TLS.	1124	# we are draining the buffer, and this can only happen with TLS.
770	$self->{rbuf} .= delete $self->{_tls_rbuf} if exists $self->{_tls_rbuf};	1125	$self->{rbuf} .= delete $self->{_tls_rbuf}
		1126	if exists $self->{_tls_rbuf};
771		1127
772	my $len = length $self->{rbuf};	1128	my $len = length $self->{rbuf};
773		1129
774	if (my $cb = shift @{ $self->{_queue} }) {	1130	if (my $cb = shift @{ $self->{_queue} }) {
775	unless ($cb->($self)) {	1131	unless ($cb->($self)) {
776	if ($self->{_eof}) {	1132	# no progress can be made
777	# no progress can be made (not enough data and no data forthcoming)	1133	# (not enough data and no data forthcoming)
778	$self->_error (&Errno::EPIPE, 1), return;	1134	$self->_error (Errno::EPIPE, 1), return
779	}	1135	if $self->{_eof};
780		1136
781	unshift @{ $self->{_queue} }, $cb;	1137	unshift @{ $self->{_queue} }, $cb;
782	last;	1138	last;
783	}	1139	}
784	} elsif ($self->{on_read}) {	1140	} elsif ($self->{on_read}) {
…		…
791	&& !@{ $self->{_queue} } # and the queue is still empty	1147	&& !@{ $self->{_queue} } # and the queue is still empty
792	&& $self->{on_read} # but we still have on_read	1148	&& $self->{on_read} # but we still have on_read
793	) {	1149	) {
794	# no further data will arrive	1150	# no further data will arrive
795	# so no progress can be made	1151	# so no progress can be made
796	$self->_error (&Errno::EPIPE, 1), return	1152	$self->_error (Errno::EPIPE, 1), return
797	if $self->{_eof};	1153	if $self->{_eof};
798		1154
799	last; # more data might arrive	1155	last; # more data might arrive
800	}	1156	}
801	} else {	1157	} else {
…		…
804	last;	1160	last;
805	}	1161	}
806	}	1162	}
807		1163
808	if ($self->{_eof}) {	1164	if ($self->{_eof}) {
809	if ($self->{on_eof}) {	1165	$self->{on_eof}
810	$self->{on_eof}($self)	1166	? $self->{on_eof}($self)
811	} else {	1167	: $self->_error (0, 1, "Unexpected end-of-file");
812	$self->_error (0, 1);	1168
813	}	1169	return;
		1170	}
		1171
		1172	if (
		1173	defined $self->{rbuf_max}
		1174	&& $self->{rbuf_max} < length $self->{rbuf}
		1175	) {
		1176	$self->_error (Errno::ENOSPC, 1), return;
814	}	1177	}
815		1178
816	# may need to restart read watcher	1179	# may need to restart read watcher
817	unless ($self->{_rw}) {	1180	unless ($self->{_rw}) {
818	$self->start_read	1181	$self->start_read
…		…
830		1193
831	sub on_read {	1194	sub on_read {
832	my ($self, $cb) = @_;	1195	my ($self, $cb) = @_;
833		1196
834	$self->{on_read} = $cb;	1197	$self->{on_read} = $cb;
835	$self->_drain_rbuf if $cb && !$self->{_in_drain};	1198	$self->_drain_rbuf if $cb;
836	}	1199	}
837		1200
838	=item $handle->rbuf	1201	=item $handle->rbuf
839		1202
840	Returns the read buffer (as a modifiable lvalue).	1203	Returns the read buffer (as a modifiable lvalue).
…		…
892	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")	1255	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::push_read")
893	->($self, $cb, @_);	1256	->($self, $cb, @_);
894	}	1257	}
895		1258
896	push @{ $self->{_queue} }, $cb;	1259	push @{ $self->{_queue} }, $cb;
897	$self->_drain_rbuf unless $self->{_in_drain};	1260	$self->_drain_rbuf;
898	}	1261	}
899		1262
900	sub unshift_read {	1263	sub unshift_read {
901	my $self = shift;	1264	my $self = shift;
902	my $cb = pop;	1265	my $cb = pop;
…		…
906		1269
907	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::unshift_read")	1270	$cb = ($RH{$type} or Carp::croak "unsupported type passed to AnyEvent::Handle::unshift_read")
908	->($self, $cb, @_);	1271	->($self, $cb, @_);
909	}	1272	}
910		1273
911
912	unshift @{ $self->{_queue} }, $cb;	1274	unshift @{ $self->{_queue} }, $cb;
913	$self->_drain_rbuf unless $self->{_in_drain};	1275	$self->_drain_rbuf;
914	}	1276	}
915		1277
916	=item $handle->push_read (type => @args, $cb)	1278	=item $handle->push_read (type => @args, $cb)
917		1279
918	=item $handle->unshift_read (type => @args, $cb)	1280	=item $handle->unshift_read (type => @args, $cb)
…		…
1051	return 1;	1413	return 1;
1052	}	1414	}
1053		1415
1054	# reject	1416	# reject
1055	if ($reject && $$rbuf =~ $reject) {	1417	if ($reject && $$rbuf =~ $reject) {
1056	$self->_error (&Errno::EBADMSG);	1418	$self->_error (Errno::EBADMSG);
1057	}	1419	}
1058		1420
1059	# skip	1421	# skip
1060	if ($skip && $$rbuf =~ $skip) {	1422	if ($skip && $$rbuf =~ $skip) {
1061	$data .= substr $$rbuf, 0, $+[0], "";	1423	$data .= substr $$rbuf, 0, $+[0], "";
…		…
1077	my ($self, $cb) = @_;	1439	my ($self, $cb) = @_;
1078		1440
1079	sub {	1441	sub {
1080	unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) {	1442	unless ($_[0]{rbuf} =~ s/^(0|[1-9][0-9]*)://) {
1081	if ($_[0]{rbuf} =~ /[^0-9]/) {	1443	if ($_[0]{rbuf} =~ /[^0-9]/) {
1082	$self->_error (&Errno::EBADMSG);	1444	$self->_error (Errno::EBADMSG);
1083	}	1445	}
1084	return;	1446	return;
1085	}	1447	}
1086		1448
1087	my $len = $1;	1449	my $len = $1;
…		…
1090	my $string = $_[1];	1452	my $string = $_[1];
1091	$_[0]->unshift_read (chunk => 1, sub {	1453	$_[0]->unshift_read (chunk => 1, sub {
1092	if ($_[1] eq ",") {	1454	if ($_[1] eq ",") {
1093	$cb->($_[0], $string);	1455	$cb->($_[0], $string);
1094	} else {	1456	} else {
1095	$self->_error (&Errno::EBADMSG);	1457	$self->_error (Errno::EBADMSG);
1096	}	1458	}
1097	});	1459	});
1098	});	1460	});
1099		1461
1100	1	1462	1
…		…
1167	=cut	1529	=cut
1168		1530
1169	register_read_type json => sub {	1531	register_read_type json => sub {
1170	my ($self, $cb) = @_;	1532	my ($self, $cb) = @_;
1171		1533
1172	require JSON;	1534	my $json = $self->{json} ||= json_coder;
1173		1535
1174	my $data;	1536	my $data;
1175	my $rbuf = \$self->{rbuf};	1537	my $rbuf = \$self->{rbuf};
1176
1177	my $json = $self->{json} ||= JSON->new->utf8;
1178		1538
1179	sub {	1539	sub {
1180	my $ref = eval { $json->incr_parse ($self->{rbuf}) };	1540	my $ref = eval { $json->incr_parse ($self->{rbuf}) };
1181		1541
1182	if ($ref) {	1542	if ($ref) {
…		…
1190	$json->incr_skip;	1550	$json->incr_skip;
1191		1551
1192	$self->{rbuf} = $json->incr_text;	1552	$self->{rbuf} = $json->incr_text;
1193	$json->incr_text = "";	1553	$json->incr_text = "";
1194		1554
1195	$self->_error (&Errno::EBADMSG);	1555	$self->_error (Errno::EBADMSG);
1196		1556
1197	()	1557	()
1198	} else {	1558	} else {
1199	$self->{rbuf} = "";	1559	$self->{rbuf} = "";
1200		1560
…		…
1237	# read remaining chunk	1597	# read remaining chunk
1238	$_[0]->unshift_read (chunk => $len, sub {	1598	$_[0]->unshift_read (chunk => $len, sub {
1239	if (my $ref = eval { Storable::thaw ($_[1]) }) {	1599	if (my $ref = eval { Storable::thaw ($_[1]) }) {
1240	$cb->($_[0], $ref);	1600	$cb->($_[0], $ref);
1241	} else {	1601	} else {
1242	$self->_error (&Errno::EBADMSG);	1602	$self->_error (Errno::EBADMSG);
1243	}	1603	}
1244	});	1604	});
1245	}	1605	}
1246		1606
1247	1	1607	1
…		…
1299	my ($self) = @_;	1659	my ($self) = @_;
1300		1660
1301	unless ($self->{_rw} || $self->{_eof}) {	1661	unless ($self->{_rw} || $self->{_eof}) {
1302	Scalar::Util::weaken $self;	1662	Scalar::Util::weaken $self;
1303		1663
1304	$self->{_rw} = AnyEvent->io (fh => $self->{fh}, poll => "r", cb => sub {	1664	$self->{_rw} = AE::io $self->{fh}, 0, sub {
1305	my $rbuf = \($self->{tls} ? my $buf : $self->{rbuf});	1665	my $rbuf = \($self->{tls} ? my $buf : $self->{rbuf});
1306	my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf;	1666	my $len = sysread $self->{fh}, $$rbuf, $self->{read_size} || 8192, length $$rbuf;
1307		1667
1308	if ($len > 0) {	1668	if ($len > 0) {
1309	$self->{_activity} = AnyEvent->now;	1669	$self->{_activity} = $self->{_ractivity} = AE::now;
1310		1670
1311	if ($self->{tls}) {	1671	if ($self->{tls}) {
1312	Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf);	1672	Net::SSLeay::BIO_write ($self->{_rbio}, $$rbuf);
1313		1673
1314	&_dotls ($self);	1674	&_dotls ($self);
1315	} else {	1675	} else {
1316	$self->_drain_rbuf unless $self->{_in_drain};	1676	$self->_drain_rbuf;
1317	}	1677	}
1318		1678
1319	} elsif (defined $len) {	1679	} elsif (defined $len) {
1320	delete $self->{_rw};	1680	delete $self->{_rw};
1321	$self->{_eof} = 1;	1681	$self->{_eof} = 1;
1322	$self->_drain_rbuf unless $self->{_in_drain};	1682	$self->_drain_rbuf;
1323		1683
1324	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {	1684	} elsif ($! != EAGAIN && $! != EINTR && $! != WSAEWOULDBLOCK) {
1325	return $self->_error ($!, 1);	1685	return $self->_error ($!, 1);
1326	}	1686	}
1327	});	1687	};
		1688	}
		1689	}
		1690
		1691	our $ERROR_SYSCALL;
		1692	our $ERROR_WANT_READ;
		1693
		1694	sub _tls_error {
		1695	my ($self, $err) = @_;
		1696
		1697	return $self->_error ($!, 1)
		1698	if $err == Net::SSLeay::ERROR_SYSCALL ();
		1699
		1700	my $err =Net::SSLeay::ERR_error_string (Net::SSLeay::ERR_get_error ());
		1701
		1702	# reduce error string to look less scary
		1703	$err =~ s/^error:[0-9a-fA-F]{8}:[^:]+:([^:]+):/\L$1: /;
		1704
		1705	if ($self->{_on_starttls}) {
		1706	(delete $self->{_on_starttls})->($self, undef, $err);
		1707	&_freetls;
		1708	} else {
		1709	&_freetls;
		1710	$self->_error (Errno::EPROTO, 1, $err);
1328	}	1711	}
1329	}	1712	}
1330		1713
1331	# poll the write BIO and send the data if applicable	1714	# poll the write BIO and send the data if applicable
		1715	# also decode read data if possible
		1716	# this is basiclaly our TLS state machine
		1717	# more efficient implementations are possible with openssl,
		1718	# but not with the buggy and incomplete Net::SSLeay.
1332	sub _dotls {	1719	sub _dotls {
1333	my ($self) = @_;	1720	my ($self) = @_;
1334		1721
1335	my $tmp;	1722	my $tmp;
1336		1723
1337	if (length $self->{_tls_wbuf}) {	1724	if (length $self->{_tls_wbuf}) {
1338	while (($tmp = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) {	1725	while (($tmp = Net::SSLeay::write ($self->{tls}, $self->{_tls_wbuf})) > 0) {
1339	substr $self->{_tls_wbuf}, 0, $tmp, "";	1726	substr $self->{_tls_wbuf}, 0, $tmp, "";
1340	}	1727	}
		1728
		1729	$tmp = Net::SSLeay::get_error ($self->{tls}, $tmp);
		1730	return $self->_tls_error ($tmp)
		1731	if $tmp != $ERROR_WANT_READ
		1732	&& ($tmp != $ERROR_SYSCALL || $!);
1341	}	1733	}
1342		1734
1343	while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) {	1735	while (defined ($tmp = Net::SSLeay::read ($self->{tls}))) {
1344	unless (length $tmp) {	1736	unless (length $tmp) {
1345	# let's treat SSL-eof as we treat normal EOF	1737	$self->{_on_starttls}
1346	delete $self->{_rw};	1738	and (delete $self->{_on_starttls})->($self, undef, "EOF during handshake"); # ???
1347	$self->{_eof} = 1;
1348	&_freetls;	1739	&_freetls;
		1740
		1741	if ($self->{on_stoptls}) {
		1742	$self->{on_stoptls}($self);
		1743	return;
		1744	} else {
		1745	# let's treat SSL-eof as we treat normal EOF
		1746	delete $self->{_rw};
		1747	$self->{_eof} = 1;
		1748	}
1349	}	1749	}
1350		1750
1351	$self->{_tls_rbuf} .= $tmp;	1751	$self->{_tls_rbuf} .= $tmp;
1352	$self->_drain_rbuf unless $self->{_in_drain};	1752	$self->_drain_rbuf;
1353	$self->{tls} or return; # tls session might have gone away in callback	1753	$self->{tls} or return; # tls session might have gone away in callback
1354	}	1754	}
1355		1755
1356	$tmp = Net::SSLeay::get_error ($self->{tls}, -1);	1756	$tmp = Net::SSLeay::get_error ($self->{tls}, -1);
1357
1358	if ($tmp != Net::SSLeay::ERROR_WANT_READ ()) {
1359	if ($tmp == Net::SSLeay::ERROR_SYSCALL ()) {
1360	return $self->_error ($!, 1);	1757	return $self->_tls_error ($tmp)
1361	} elsif ($tmp == Net::SSLeay::ERROR_SSL ()) {	1758	if $tmp != $ERROR_WANT_READ
1362	return $self->_error (&Errno::EIO, 1);	1759	&& ($tmp != $ERROR_SYSCALL || $!);
1363	}
1364
1365	# all other errors are fine for our purposes
1366	}
1367		1760
1368	while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) {	1761	while (length ($tmp = Net::SSLeay::BIO_read ($self->{_wbio}))) {
1369	$self->{wbuf} .= $tmp;	1762	$self->{wbuf} .= $tmp;
1370	$self->_drain_wbuf;	1763	$self->_drain_wbuf;
1371	}	1764	}
		1765
		1766	$self->{_on_starttls}
		1767	and Net::SSLeay::state ($self->{tls}) == Net::SSLeay::ST_OK ()
		1768	and (delete $self->{_on_starttls})->($self, 1, "TLS/SSL connection established");
1372	}	1769	}
1373		1770
1374	=item $handle->starttls ($tls[, $tls_ctx])	1771	=item $handle->starttls ($tls[, $tls_ctx])
1375		1772
1376	Instead of starting TLS negotiation immediately when the AnyEvent::Handle	1773	Instead of starting TLS negotiation immediately when the AnyEvent::Handle
1377	object is created, you can also do that at a later time by calling	1774	object is created, you can also do that at a later time by calling
1378	C<starttls>.	1775	C<starttls>.
1379		1776
		1777	Starting TLS is currently an asynchronous operation - when you push some
		1778	write data and then call C<< ->starttls >> then TLS negotiation will start
		1779	immediately, after which the queued write data is then sent.
		1780
1380	The first argument is the same as the C<tls> constructor argument (either	1781	The first argument is the same as the C<tls> constructor argument (either
1381	C<"connect">, C<"accept"> or an existing Net::SSLeay object).	1782	C<"connect">, C<"accept"> or an existing Net::SSLeay object).
1382		1783
1383	The second argument is the optional C<Net::SSLeay::CTX> object that is	1784	The second argument is the optional C<AnyEvent::TLS> object that is used
1384	used when AnyEvent::Handle has to create its own TLS connection object.	1785	when AnyEvent::Handle has to create its own TLS connection object, or
		1786	a hash reference with C<< key => value >> pairs that will be used to
		1787	construct a new context.
1385		1788
1386	The TLS connection object will end up in C<< $handle->{tls} >> after this	1789	The TLS connection object will end up in C<< $handle->{tls} >>, the TLS
1387	call and can be used or changed to your liking. Note that the handshake	1790	context in C<< $handle->{tls_ctx} >> after this call and can be used or
1388	might have already started when this function returns.	1791	changed to your liking. Note that the handshake might have already started
		1792	when this function returns.
1389		1793
1390	If it an error to start a TLS handshake more than once per	1794	Due to bugs in OpenSSL, it might or might not be possible to do multiple
1391	AnyEvent::Handle object (this is due to bugs in OpenSSL).	1795	handshakes on the same stream. Best do not attempt to use the stream after
		1796	stopping TLS.
1392		1797
1393	=cut	1798	=cut
		1799
		1800	our %TLS_CACHE; #TODO not yet documented, should we?
1394		1801
1395	sub starttls {	1802	sub starttls {
1396	my ($self, $ssl, $ctx) = @_;	1803	my ($self, $tls, $ctx) = @_;
		1804
		1805	Carp::croak "It is an error to call starttls on an AnyEvent::Handle object while TLS is already active, caught"
		1806	if $self->{tls};
		1807
		1808	$self->{tls} = $tls;
		1809	$self->{tls_ctx} = $ctx if @_ > 2;
		1810
		1811	return unless $self->{fh};
1397		1812
1398	require Net::SSLeay;	1813	require Net::SSLeay;
1399		1814
1400	Carp::croak "it is an error to call starttls more than once on an AnyEvent::Handle object"	1815	$ERROR_SYSCALL = Net::SSLeay::ERROR_SYSCALL ();
1401	if $self->{tls};	1816	$ERROR_WANT_READ = Net::SSLeay::ERROR_WANT_READ ();
		1817
		1818	$tls = delete $self->{tls};
		1819	$ctx = $self->{tls_ctx};
		1820
		1821	local $Carp::CarpLevel = 1; # skip ourselves when creating a new context or session
		1822
		1823	if ("HASH" eq ref $ctx) {
		1824	require AnyEvent::TLS;
		1825
		1826	if ($ctx->{cache}) {
		1827	my $key = $ctx+0;
		1828	$ctx = $TLS_CACHE{$key} ||= new AnyEvent::TLS %$ctx;
		1829	} else {
		1830	$ctx = new AnyEvent::TLS %$ctx;
		1831	}
		1832	}
1402		1833
1403	if ($ssl eq "accept") {	1834	$self->{tls_ctx} = $ctx || TLS_CTX ();
1404	$ssl = Net::SSLeay::new ($ctx || TLS_CTX ());	1835	$self->{tls} = $tls = $self->{tls_ctx}->_get_session ($tls, $self, $self->{peername});
1405	Net::SSLeay::set_accept_state ($ssl);
1406	} elsif ($ssl eq "connect") {
1407	$ssl = Net::SSLeay::new ($ctx || TLS_CTX ());
1408	Net::SSLeay::set_connect_state ($ssl);
1409	}
1410
1411	$self->{tls} = $ssl;
1412		1836
1413	# basically, this is deep magic (because SSL_read should have the same issues)	1837	# basically, this is deep magic (because SSL_read should have the same issues)
1414	# but the openssl maintainers basically said: "trust us, it just works".	1838	# but the openssl maintainers basically said: "trust us, it just works".
1415	# (unfortunately, we have to hardcode constants because the abysmally misdesigned	1839	# (unfortunately, we have to hardcode constants because the abysmally misdesigned
1416	# and mismaintained ssleay-module doesn't even offer them).	1840	# and mismaintained ssleay-module doesn't even offer them).
…		…
1420	#	1844	#
1421	# note that we do not try to keep the length constant between writes as we are required to do.	1845	# note that we do not try to keep the length constant between writes as we are required to do.
1422	# we assume that most (but not all) of this insanity only applies to non-blocking cases,	1846	# we assume that most (but not all) of this insanity only applies to non-blocking cases,
1423	# and we drive openssl fully in blocking mode here. Or maybe we don't - openssl seems to	1847	# and we drive openssl fully in blocking mode here. Or maybe we don't - openssl seems to
1424	# have identity issues in that area.	1848	# have identity issues in that area.
1425	Net::SSLeay::CTX_set_mode ($self->{tls},	1849	# Net::SSLeay::CTX_set_mode ($ssl,
1426	(eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1)	1850	# (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ENABLE_PARTIAL_WRITE () } || 1)
1427	| (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2));	1851	# | (eval { local $SIG{__DIE__}; Net::SSLeay::MODE_ACCEPT_MOVING_WRITE_BUFFER () } || 2));
		1852	Net::SSLeay::CTX_set_mode ($tls, 1|2);
1428		1853
1429	$self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());	1854	$self->{_rbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
1430	$self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());	1855	$self->{_wbio} = Net::SSLeay::BIO_new (Net::SSLeay::BIO_s_mem ());
1431		1856
		1857	Net::SSLeay::BIO_write ($self->{_rbio}, delete $self->{rbuf});
		1858
1432	Net::SSLeay::set_bio ($ssl, $self->{_rbio}, $self->{_wbio});	1859	Net::SSLeay::set_bio ($tls, $self->{_rbio}, $self->{_wbio});
		1860
		1861	$self->{_on_starttls} = sub { $_[0]{on_starttls}(@_) }
		1862	if $self->{on_starttls};
1433		1863
1434	&_dotls; # need to trigger the initial handshake	1864	&_dotls; # need to trigger the initial handshake
1435	$self->start_read; # make sure we actually do read	1865	$self->start_read; # make sure we actually do read
1436	}	1866	}
1437		1867
1438	=item $handle->stoptls	1868	=item $handle->stoptls
1439		1869
1440	Shuts down the SSL connection - this makes a proper EOF handshake by	1870	Shuts down the SSL connection - this makes a proper EOF handshake by
1441	sending a close notify to the other side, but since OpenSSL doesn't	1871	sending a close notify to the other side, but since OpenSSL doesn't
1442	support non-blocking shut downs, it is not possible to re-use the stream	1872	support non-blocking shut downs, it is not guarenteed that you can re-use
1443	afterwards.	1873	the stream afterwards.
1444		1874
1445	=cut	1875	=cut
1446		1876
1447	sub stoptls {	1877	sub stoptls {
1448	my ($self) = @_;	1878	my ($self) = @_;
…		…
1450	if ($self->{tls}) {	1880	if ($self->{tls}) {
1451	Net::SSLeay::shutdown ($self->{tls});	1881	Net::SSLeay::shutdown ($self->{tls});
1452		1882
1453	&_dotls;	1883	&_dotls;
1454		1884
1455	# we don't give a shit. no, we do, but we can't. no...	1885	# # we don't give a shit. no, we do, but we can't. no...#d#
1456	# we, we... have to use openssl :/	1886	# # we, we... have to use openssl :/#d#
1457	&_freetls;	1887	# &_freetls;#d#
1458	}	1888	}
1459	}	1889	}
1460		1890
1461	sub _freetls {	1891	sub _freetls {
1462	my ($self) = @_;	1892	my ($self) = @_;
1463		1893
1464	return unless $self->{tls};	1894	return unless $self->{tls};
1465		1895
1466	Net::SSLeay::free (delete $self->{tls});	1896	$self->{tls_ctx}->_put_session (delete $self->{tls})
		1897	if $self->{tls} > 0;
1467		1898
1468	delete @$self{qw(_rbio _wbio _tls_wbuf)};	1899	delete @$self{qw(_rbio _wbio _tls_wbuf _on_starttls)};
1469	}	1900	}
1470		1901
1471	sub DESTROY {	1902	sub DESTROY {
1472	my ($self) = @_;	1903	my ($self) = @_;
1473		1904
1474	&_freetls;	1905	&_freetls;
1475		1906
1476	my $linger = exists $self->{linger} ? $self->{linger} : 3600;	1907	my $linger = exists $self->{linger} ? $self->{linger} : 3600;
1477		1908
1478	if ($linger && length $self->{wbuf}) {	1909	if ($linger && length $self->{wbuf} && $self->{fh}) {
1479	my $fh = delete $self->{fh};	1910	my $fh = delete $self->{fh};
1480	my $wbuf = delete $self->{wbuf};	1911	my $wbuf = delete $self->{wbuf};
1481		1912
1482	my @linger;	1913	my @linger;
1483		1914
1484	push @linger, AnyEvent->io (fh => $fh, poll => "w", cb => sub {	1915	push @linger, AE::io $fh, 1, sub {
1485	my $len = syswrite $fh, $wbuf, length $wbuf;	1916	my $len = syswrite $fh, $wbuf, length $wbuf;
1486		1917
1487	if ($len > 0) {	1918	if ($len > 0) {
1488	substr $wbuf, 0, $len, "";	1919	substr $wbuf, 0, $len, "";
1489	} else {	1920	} else {
1490	@linger = (); # end	1921	@linger = (); # end
1491	}	1922	}
1492	});	1923	};
1493	push @linger, AnyEvent->timer (after => $linger, cb => sub {	1924	push @linger, AE::timer $linger, 0, sub {
1494	@linger = ();	1925	@linger = ();
1495	});	1926	};
1496	}	1927	}
1497	}	1928	}
1498		1929
1499	=item $handle->destroy	1930	=item $handle->destroy
1500		1931
1501	Shuts down the handle object as much as possible - this call ensures that	1932	Shuts down the handle object as much as possible - this call ensures that
1502	no further callbacks will be invoked and resources will be freed as much	1933	no further callbacks will be invoked and as many resources as possible
1503	as possible. You must not call any methods on the object afterwards.	1934	will be freed. Any method you will call on the handle object after
		1935	destroying it in this way will be silently ignored (and it will return the
		1936	empty list).
1504		1937
1505	Normally, you can just "forget" any references to an AnyEvent::Handle	1938	Normally, you can just "forget" any references to an AnyEvent::Handle
1506	object and it will simply shut down. This works in fatal error and EOF	1939	object and it will simply shut down. This works in fatal error and EOF
1507	callbacks, as well as code outside. It does I<NOT> work in a read or write	1940	callbacks, as well as code outside. It does I<NOT> work in a read or write
1508	callback, so when you want to destroy the AnyEvent::Handle object from	1941	callback, so when you want to destroy the AnyEvent::Handle object from
1509	within such an callback. You I<MUST> call C<< ->destroy >> explicitly in	1942	within such an callback. You I<MUST> call C<< ->destroy >> explicitly in
1510	that case.	1943	that case.
1511		1944
		1945	Destroying the handle object in this way has the advantage that callbacks
		1946	will be removed as well, so if those are the only reference holders (as
		1947	is common), then one doesn't need to do anything special to break any
		1948	reference cycles.
		1949
1512	The handle might still linger in the background and write out remaining	1950	The handle might still linger in the background and write out remaining
1513	data, as specified by the C<linger> option, however.	1951	data, as specified by the C<linger> option, however.
1514		1952
1515	=cut	1953	=cut
1516		1954
1517	sub destroy {	1955	sub destroy {
1518	my ($self) = @_;	1956	my ($self) = @_;
1519		1957
1520	$self->DESTROY;	1958	$self->DESTROY;
1521	%$self = ();	1959	%$self = ();
		1960	bless $self, "AnyEvent::Handle::destroyed";
		1961	}
		1962
		1963	sub AnyEvent::Handle::destroyed::AUTOLOAD {
		1964	#nop
1522	}	1965	}
1523		1966
1524	=item AnyEvent::Handle::TLS_CTX	1967	=item AnyEvent::Handle::TLS_CTX
1525		1968
1526	This function creates and returns the Net::SSLeay::CTX object used by	1969	This function creates and returns the AnyEvent::TLS object used by default
1527	default for TLS mode.	1970	for TLS mode.
1528		1971
1529	The context is created like this:	1972	The context is created by calling L<AnyEvent::TLS> without any arguments.
1530
1531	Net::SSLeay::load_error_strings;
1532	Net::SSLeay::SSLeay_add_ssl_algorithms;
1533	Net::SSLeay::randomize;
1534
1535	my $CTX = Net::SSLeay::CTX_new;
1536
1537	Net::SSLeay::CTX_set_options $CTX, Net::SSLeay::OP_ALL
1538		1973
1539	=cut	1974	=cut
1540		1975
1541	our $TLS_CTX;	1976	our $TLS_CTX;
1542		1977
1543	sub TLS_CTX() {	1978	sub TLS_CTX() {
1544	$TLS_CTX || do {	1979	$TLS_CTX ||= do {
1545	require Net::SSLeay;	1980	require AnyEvent::TLS;
1546		1981
1547	Net::SSLeay::load_error_strings ();	1982	new AnyEvent::TLS
1548	Net::SSLeay::SSLeay_add_ssl_algorithms ();
1549	Net::SSLeay::randomize ();
1550
1551	$TLS_CTX = Net::SSLeay::CTX_new ();
1552
1553	Net::SSLeay::CTX_set_options ($TLS_CTX, Net::SSLeay::OP_ALL ());
1554
1555	$TLS_CTX
1556	}	1983	}
1557	}	1984	}
1558		1985
1559	=back	1986	=back
1560		1987
…		…
1599		2026
1600	$handle->on_read (sub { });	2027	$handle->on_read (sub { });
1601	$handle->on_eof (undef);	2028	$handle->on_eof (undef);
1602	$handle->on_error (sub {	2029	$handle->on_error (sub {
1603	my $data = delete $_[0]{rbuf};	2030	my $data = delete $_[0]{rbuf};
1604	undef $handle;
1605	});	2031	});
1606		2032
1607	The reason to use C<on_error> is that TCP connections, due to latencies	2033	The reason to use C<on_error> is that TCP connections, due to latencies
1608	and packets loss, might get closed quite violently with an error, when in	2034	and packets loss, might get closed quite violently with an error, when in
1609	fact, all data has been received.	2035	fact, all data has been received.
…		…
1625	$handle->on_drain (sub {	2051	$handle->on_drain (sub {
1626	warn "all data submitted to the kernel\n";	2052	warn "all data submitted to the kernel\n";
1627	undef $handle;	2053	undef $handle;
1628	});	2054	});
1629		2055
		2056	If you just want to queue some data and then signal EOF to the other side,
		2057	consider using C<< ->push_shutdown >> instead.
		2058
		2059	=item I want to contact a TLS/SSL server, I don't care about security.
		2060
		2061	If your TLS server is a pure TLS server (e.g. HTTPS) that only speaks TLS,
		2062	simply connect to it and then create the AnyEvent::Handle with the C<tls>
		2063	parameter:
		2064
		2065	tcp_connect $host, $port, sub {
		2066	my ($fh) = @_;
		2067
		2068	my $handle = new AnyEvent::Handle
		2069	fh => $fh,
		2070	tls => "connect",
		2071	on_error => sub { ... };
		2072
		2073	$handle->push_write (...);
		2074	};
		2075
		2076	=item I want to contact a TLS/SSL server, I do care about security.
		2077
		2078	Then you should additionally enable certificate verification, including
		2079	peername verification, if the protocol you use supports it (see
		2080	L<AnyEvent::TLS>, C<verify_peername>).
		2081
		2082	E.g. for HTTPS:
		2083
		2084	tcp_connect $host, $port, sub {
		2085	my ($fh) = @_;
		2086
		2087	my $handle = new AnyEvent::Handle
		2088	fh => $fh,
		2089	peername => $host,
		2090	tls => "connect",
		2091	tls_ctx => { verify => 1, verify_peername => "https" },
		2092	...
		2093
		2094	Note that you must specify the hostname you connected to (or whatever
		2095	"peername" the protocol needs) as the C<peername> argument, otherwise no
		2096	peername verification will be done.
		2097
		2098	The above will use the system-dependent default set of trusted CA
		2099	certificates. If you want to check against a specific CA, add the
		2100	C<ca_file> (or C<ca_cert>) arguments to C<tls_ctx>:
		2101
		2102	tls_ctx => {
		2103	verify => 1,
		2104	verify_peername => "https",
		2105	ca_file => "my-ca-cert.pem",
		2106	},
		2107
		2108	=item I want to create a TLS/SSL server, how do I do that?
		2109
		2110	Well, you first need to get a server certificate and key. You have
		2111	three options: a) ask a CA (buy one, use cacert.org etc.) b) create a
		2112	self-signed certificate (cheap. check the search engine of your choice,
		2113	there are many tutorials on the net) or c) make your own CA (tinyca2 is a
		2114	nice program for that purpose).
		2115
		2116	Then create a file with your private key (in PEM format, see
		2117	L<AnyEvent::TLS>), followed by the certificate (also in PEM format). The
		2118	file should then look like this:
		2119
		2120	-----BEGIN RSA PRIVATE KEY-----
		2121	...header data
		2122	... lots of base64'y-stuff
		2123	-----END RSA PRIVATE KEY-----
		2124
		2125	-----BEGIN CERTIFICATE-----
		2126	... lots of base64'y-stuff
		2127	-----END CERTIFICATE-----
		2128
		2129	The important bits are the "PRIVATE KEY" and "CERTIFICATE" parts. Then
		2130	specify this file as C<cert_file>:
		2131
		2132	tcp_server undef, $port, sub {
		2133	my ($fh) = @_;
		2134
		2135	my $handle = new AnyEvent::Handle
		2136	fh => $fh,
		2137	tls => "accept",
		2138	tls_ctx => { cert_file => "my-server-keycert.pem" },
		2139	...
		2140
		2141	When you have intermediate CA certificates that your clients might not
		2142	know about, just append them to the C<cert_file>.
		2143
1630	=back	2144	=back
1631		2145
1632		2146
1633	=head1 SUBCLASSING AnyEvent::Handle	2147	=head1 SUBCLASSING AnyEvent::Handle
1634		2148

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