1 |
root |
1.1 |
=head1 NAME |
2 |
|
|
|
3 |
root |
1.3 |
AnyEvent::MP::Kernel - the actual message passing kernel |
4 |
root |
1.1 |
|
5 |
|
|
=head1 SYNOPSIS |
6 |
|
|
|
7 |
root |
1.3 |
use AnyEvent::MP::Kernel; |
8 |
root |
1.1 |
|
9 |
|
|
=head1 DESCRIPTION |
10 |
|
|
|
11 |
|
|
This module provides most of the basic functionality of AnyEvent::MP, |
12 |
|
|
exposed through higher level interfaces such as L<AnyEvent::MP> and |
13 |
|
|
L<Coro::MP>. |
14 |
|
|
|
15 |
root |
1.3 |
This module is mainly of interest when knowledge about connectivity, |
16 |
|
|
connected nodes etc. are needed. |
17 |
|
|
|
18 |
|
|
=head1 GLOBALS AND FUNCTIONS |
19 |
root |
1.1 |
|
20 |
|
|
=over 4 |
21 |
|
|
|
22 |
|
|
=cut |
23 |
|
|
|
24 |
|
|
package AnyEvent::MP::Kernel; |
25 |
|
|
|
26 |
|
|
use common::sense; |
27 |
|
|
use Carp (); |
28 |
|
|
use MIME::Base64 (); |
29 |
|
|
|
30 |
|
|
use AE (); |
31 |
|
|
|
32 |
|
|
use AnyEvent::MP::Node; |
33 |
|
|
use AnyEvent::MP::Transport; |
34 |
|
|
|
35 |
|
|
use base "Exporter"; |
36 |
|
|
|
37 |
root |
1.5 |
our $VERSION = '0.6'; |
38 |
root |
1.1 |
our @EXPORT = qw( |
39 |
root |
1.11 |
%NODE %PORT %PORT_DATA $UNIQ $RUNIQ $ID add_node load_func snd_to_func |
40 |
root |
1.1 |
|
41 |
root |
1.10 |
NODE $NODE node_of snd kil |
42 |
root |
1.1 |
resolve_node initialise_node |
43 |
|
|
); |
44 |
|
|
|
45 |
|
|
our $DEFAULT_PORT = "4040"; |
46 |
|
|
|
47 |
|
|
our $CONNECT_INTERVAL = 2; # new connect every 2s, at least |
48 |
|
|
our $NETWORK_LATENCY = 3; # activity timeout |
49 |
|
|
our $MONITOR_TIMEOUT = 15; # fail monitoring after this time |
50 |
|
|
|
51 |
|
|
=item $AnyEvent::MP::Kernel::WARN |
52 |
|
|
|
53 |
|
|
This value is called with an error or warning message, when e.g. a connection |
54 |
|
|
could not be created, authorisation failed and so on. |
55 |
|
|
|
56 |
|
|
The default simply logs the message to STDERR. |
57 |
|
|
|
58 |
|
|
=cut |
59 |
|
|
|
60 |
|
|
our $WARN = sub { |
61 |
|
|
my $msg = $_[0]; |
62 |
|
|
$msg =~ s/\n$//; |
63 |
|
|
warn "$msg\n"; |
64 |
|
|
}; |
65 |
|
|
|
66 |
root |
1.6 |
sub load_func($) { |
67 |
|
|
my $func = $_[0]; |
68 |
|
|
|
69 |
|
|
unless (defined &$func) { |
70 |
|
|
my $pkg = $func; |
71 |
|
|
do { |
72 |
|
|
$pkg =~ s/::[^:]+$// |
73 |
|
|
or return sub { die "unable to resolve '$func'" }; |
74 |
|
|
eval "require $pkg"; |
75 |
|
|
} until defined &$func; |
76 |
|
|
} |
77 |
|
|
|
78 |
|
|
\&$func |
79 |
|
|
} |
80 |
|
|
|
81 |
root |
1.1 |
sub nonce($) { |
82 |
|
|
my $nonce; |
83 |
|
|
|
84 |
|
|
if (open my $fh, "</dev/urandom") { |
85 |
|
|
sysread $fh, $nonce, $_[0]; |
86 |
|
|
} else { |
87 |
|
|
# shit... |
88 |
|
|
our $nonce_init; |
89 |
|
|
unless ($nonce_init++) { |
90 |
|
|
srand time ^ $$ ^ unpack "%L*", qx"ps -edalf" . qx"ipconfig /all"; |
91 |
|
|
} |
92 |
|
|
|
93 |
|
|
$nonce = join "", map +(chr rand 256), 1 .. $_[0] |
94 |
|
|
} |
95 |
|
|
|
96 |
|
|
$nonce |
97 |
|
|
} |
98 |
|
|
|
99 |
|
|
sub asciibits($) { |
100 |
|
|
my $data = $_[0]; |
101 |
|
|
|
102 |
|
|
if (eval "use Math::GMP 2.05; 1") { |
103 |
|
|
$data = Math::GMP::get_str_gmp ( |
104 |
|
|
(Math::GMP::new_from_scalar_with_base (+(unpack "H*", $data), 16)), |
105 |
|
|
62 |
106 |
|
|
); |
107 |
|
|
} else { |
108 |
|
|
$data = MIME::Base64::encode_base64 $data, ""; |
109 |
|
|
$data =~ s/=//; |
110 |
|
|
$data =~ s/\//s/g; |
111 |
|
|
$data =~ s/\+/p/g; |
112 |
|
|
} |
113 |
|
|
|
114 |
|
|
$data |
115 |
|
|
} |
116 |
|
|
|
117 |
|
|
sub gen_uniq { |
118 |
|
|
asciibits pack "wNa*", $$, time, nonce 2 |
119 |
|
|
} |
120 |
|
|
|
121 |
root |
1.3 |
=item $AnyEvent::MP::Kernel::PUBLIC |
122 |
|
|
|
123 |
|
|
A boolean indicating whether this is a full/public node, which can create |
124 |
|
|
and accept direct connections form othe rnodes. |
125 |
|
|
|
126 |
|
|
=item $AnyEvent::MP::Kernel::SLAVE |
127 |
|
|
|
128 |
|
|
A boolean indicating whether this node is a slave node, i.e. does most of it's |
129 |
|
|
message sending/receiving through some master node. |
130 |
|
|
|
131 |
|
|
=item $AnyEvent::MP::Kernel::MASTER |
132 |
|
|
|
133 |
|
|
Defined only in slave mode, in which cas eit contains the noderef of the |
134 |
|
|
master node. |
135 |
|
|
|
136 |
|
|
=cut |
137 |
|
|
|
138 |
root |
1.1 |
our $PUBLIC = 0; |
139 |
|
|
our $SLAVE = 0; |
140 |
|
|
our $MASTER; # master noderef when $SLAVE |
141 |
|
|
|
142 |
|
|
our $NODE = asciibits nonce 16; |
143 |
|
|
our $RUNIQ = $NODE; # remote uniq value |
144 |
|
|
our $UNIQ = gen_uniq; # per-process/node unique cookie |
145 |
|
|
our $ID = "a"; |
146 |
|
|
|
147 |
|
|
our %NODE; # node id to transport mapping, or "undef", for local node |
148 |
|
|
our (%PORT, %PORT_DATA); # local ports |
149 |
|
|
|
150 |
|
|
our %RMON; # local ports monitored by remote nodes ($RMON{noderef}{portid} == cb) |
151 |
|
|
our %LMON; # monitored _local_ ports |
152 |
|
|
|
153 |
|
|
our %LISTENER; |
154 |
|
|
|
155 |
|
|
our $SRCNODE; # holds the sending node during _inject |
156 |
|
|
|
157 |
|
|
sub NODE() { |
158 |
|
|
$NODE |
159 |
|
|
} |
160 |
|
|
|
161 |
|
|
sub node_of($) { |
162 |
|
|
my ($noderef, undef) = split /#/, $_[0], 2; |
163 |
|
|
|
164 |
|
|
$noderef |
165 |
|
|
} |
166 |
|
|
|
167 |
|
|
sub TRACE() { 0 } |
168 |
|
|
|
169 |
|
|
sub _inject { |
170 |
|
|
warn "RCV $SRCNODE->{noderef} -> @_\n" if TRACE;#d# |
171 |
|
|
&{ $PORT{+shift} or return }; |
172 |
|
|
} |
173 |
|
|
|
174 |
|
|
sub add_node { |
175 |
|
|
my ($noderef) = @_; |
176 |
|
|
|
177 |
|
|
return $NODE{$noderef} |
178 |
|
|
if exists $NODE{$noderef}; |
179 |
|
|
|
180 |
|
|
for (split /,/, $noderef) { |
181 |
|
|
return $NODE{$noderef} = $NODE{$_} |
182 |
|
|
if exists $NODE{$_}; |
183 |
|
|
} |
184 |
|
|
|
185 |
|
|
# new node, check validity |
186 |
|
|
my $node; |
187 |
|
|
|
188 |
|
|
if ($noderef =~ /^slave\/.+$/) { |
189 |
|
|
$node = new AnyEvent::MP::Node::Indirect $noderef; |
190 |
|
|
|
191 |
|
|
} else { |
192 |
|
|
for (split /,/, $noderef) { |
193 |
|
|
my ($host, $port) = AnyEvent::Socket::parse_hostport $_ |
194 |
|
|
or Carp::croak "$noderef: not a resolved node reference ('$_' not parsable)"; |
195 |
|
|
|
196 |
|
|
$port > 0 |
197 |
|
|
or Carp::croak "$noderef: not a resolved node reference ('$_' contains non-numeric port)"; |
198 |
|
|
|
199 |
|
|
AnyEvent::Socket::parse_address $host |
200 |
|
|
or Carp::croak "$noderef: not a resolved node reference ('$_' contains unresolved address)"; |
201 |
|
|
} |
202 |
|
|
|
203 |
|
|
# TODO: for indirect sends, use a different class |
204 |
|
|
$node = new AnyEvent::MP::Node::Direct $noderef; |
205 |
|
|
} |
206 |
|
|
|
207 |
|
|
$NODE{$_} = $node |
208 |
|
|
for $noderef, split /,/, $noderef; |
209 |
|
|
|
210 |
|
|
$node |
211 |
|
|
} |
212 |
|
|
|
213 |
|
|
sub snd(@) { |
214 |
|
|
my ($noderef, $portid) = split /#/, shift, 2; |
215 |
|
|
|
216 |
|
|
warn "SND $noderef <- $portid @_\n" if TRACE;#d# |
217 |
|
|
|
218 |
|
|
($NODE{$noderef} || add_node $noderef) |
219 |
root |
1.2 |
->{send} (["$portid", @_]); |
220 |
root |
1.1 |
} |
221 |
|
|
|
222 |
root |
1.11 |
=item snd_to_func $noderef, $func, @args |
223 |
|
|
|
224 |
|
|
Expects a noderef and a name of a function. Asynchronously tries to call |
225 |
|
|
this function with the given arguments on that node. |
226 |
|
|
|
227 |
|
|
This fucntion can be used to implement C<spawn>-like interfaces. |
228 |
|
|
|
229 |
|
|
=cut |
230 |
|
|
|
231 |
|
|
sub snd_to_func { |
232 |
|
|
my $noderef = shift; |
233 |
|
|
|
234 |
|
|
($NODE{$noderef} || add_node $noderef) |
235 |
|
|
->send (["", @_]); |
236 |
|
|
} |
237 |
|
|
|
238 |
root |
1.1 |
sub kil(@) { |
239 |
|
|
my ($noderef, $portid) = split /#/, shift, 2; |
240 |
|
|
|
241 |
|
|
length $portid |
242 |
|
|
or Carp::croak "$noderef#$portid: killing a node port is not allowed, caught"; |
243 |
|
|
|
244 |
|
|
($NODE{$noderef} || add_node $noderef) |
245 |
|
|
->kill ("$portid", @_); |
246 |
|
|
} |
247 |
|
|
|
248 |
root |
1.7 |
sub _nodename { |
249 |
|
|
require POSIX; |
250 |
|
|
(POSIX::uname ())[1] |
251 |
|
|
} |
252 |
|
|
|
253 |
root |
1.1 |
sub resolve_node($) { |
254 |
|
|
my ($noderef) = @_; |
255 |
|
|
|
256 |
|
|
my $cv = AE::cv; |
257 |
|
|
my @res; |
258 |
|
|
|
259 |
|
|
$cv->begin (sub { |
260 |
|
|
my %seen; |
261 |
|
|
my @refs; |
262 |
|
|
for (sort { $a->[0] <=> $b->[0] } @res) { |
263 |
|
|
push @refs, $_->[1] unless $seen{$_->[1]}++ |
264 |
|
|
} |
265 |
|
|
shift->send (join ",", @refs); |
266 |
|
|
}); |
267 |
|
|
|
268 |
|
|
$noderef = $DEFAULT_PORT unless length $noderef; |
269 |
|
|
|
270 |
|
|
my $idx; |
271 |
|
|
for my $t (split /,/, $noderef) { |
272 |
|
|
my $pri = ++$idx; |
273 |
root |
1.7 |
|
274 |
|
|
$t = length $t ? _nodename . ":$t" : _nodename |
275 |
|
|
if $t =~ /^\d*$/; |
276 |
root |
1.1 |
|
277 |
root |
1.7 |
my ($host, $port) = AnyEvent::Socket::parse_hostport $t, "aemp=$DEFAULT_PORT" |
278 |
|
|
or Carp::croak "$t: unparsable transport descriptor"; |
279 |
|
|
|
280 |
|
|
$cv->begin; |
281 |
|
|
AnyEvent::Socket::resolve_sockaddr $host, $port, "tcp", 0, undef, sub { |
282 |
|
|
for (@_) { |
283 |
|
|
my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3]; |
284 |
|
|
push @res, [ |
285 |
|
|
$pri += 1e-5, |
286 |
|
|
AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service |
287 |
|
|
]; |
288 |
root |
1.1 |
} |
289 |
root |
1.7 |
$cv->end; |
290 |
|
|
}; |
291 |
root |
1.1 |
} |
292 |
|
|
|
293 |
|
|
$cv->end; |
294 |
|
|
|
295 |
|
|
$cv |
296 |
|
|
} |
297 |
|
|
|
298 |
|
|
sub initialise_node(@) { |
299 |
|
|
my ($noderef, @others) = @_; |
300 |
|
|
|
301 |
root |
1.7 |
my $profile = AnyEvent::MP::Config::find_profile |
302 |
|
|
+(defined $noderef ? $noderef : _nodename); |
303 |
root |
1.6 |
|
304 |
|
|
$noderef = $profile->{noderef} |
305 |
root |
1.7 |
if exists $profile->{noderef}; |
306 |
root |
1.6 |
|
307 |
root |
1.9 |
push @others, @{ $profile->{seeds} }; |
308 |
root |
1.3 |
|
309 |
root |
1.1 |
if ($noderef =~ /^slave\/(.*)$/) { |
310 |
|
|
$SLAVE = AE::cv; |
311 |
|
|
my $name = $1; |
312 |
|
|
$name = $NODE unless length $name; |
313 |
|
|
$noderef = AE::cv; |
314 |
|
|
$noderef->send ("slave/$name"); |
315 |
|
|
|
316 |
|
|
@others |
317 |
|
|
or Carp::croak "seed nodes must be specified for slave nodes"; |
318 |
|
|
|
319 |
|
|
} else { |
320 |
|
|
$PUBLIC = 1; |
321 |
|
|
$noderef = resolve_node $noderef; |
322 |
|
|
} |
323 |
|
|
|
324 |
|
|
@others = map $_->recv, map +(resolve_node $_), @others; |
325 |
|
|
|
326 |
|
|
$NODE = $noderef->recv; |
327 |
|
|
|
328 |
|
|
for my $t (split /,/, $NODE) { |
329 |
|
|
$NODE{$t} = $NODE{""}; |
330 |
|
|
|
331 |
|
|
my ($host, $port) = AnyEvent::Socket::parse_hostport $t; |
332 |
|
|
|
333 |
|
|
$LISTENER{$t} = AnyEvent::MP::Transport::mp_server $host, $port, |
334 |
|
|
sub { |
335 |
|
|
my ($tp) = @_; |
336 |
|
|
|
337 |
|
|
# TODO: urgs |
338 |
|
|
my $node = add_node $tp->{remote_node}; |
339 |
|
|
$node->{trial}{accept} = $tp; |
340 |
|
|
}, |
341 |
|
|
; |
342 |
|
|
} |
343 |
|
|
|
344 |
|
|
(add_node $_)->connect for @others; |
345 |
|
|
|
346 |
|
|
if ($SLAVE) { |
347 |
|
|
my $timeout = AE::timer $MONITOR_TIMEOUT, 0, sub { $SLAVE->() }; |
348 |
|
|
$MASTER = $SLAVE->recv; |
349 |
|
|
defined $MASTER |
350 |
|
|
or Carp::croak "AnyEvent::MP: unable to enter slave mode, unable to connect to a seednode.\n"; |
351 |
|
|
|
352 |
|
|
(my $via = $MASTER) =~ s/,/!/g; |
353 |
|
|
|
354 |
|
|
$NODE .= "\@$via"; |
355 |
|
|
$NODE{$NODE} = $NODE{""}; |
356 |
|
|
|
357 |
root |
1.2 |
$_->send (["", iam => $NODE]) |
358 |
root |
1.1 |
for values %NODE; |
359 |
|
|
|
360 |
|
|
$SLAVE = 1; |
361 |
|
|
} |
362 |
root |
1.6 |
|
363 |
|
|
(load_func $_)->() |
364 |
|
|
for @{ $profile->{services} }; |
365 |
root |
1.1 |
} |
366 |
|
|
|
367 |
|
|
############################################################################# |
368 |
root |
1.6 |
# node monitoring and info |
369 |
root |
1.3 |
|
370 |
|
|
sub _uniq_nodes { |
371 |
|
|
my %node; |
372 |
|
|
|
373 |
|
|
@node{values %NODE} = values %NODE; |
374 |
|
|
|
375 |
|
|
values %node; |
376 |
|
|
} |
377 |
|
|
|
378 |
|
|
=item known_nodes |
379 |
|
|
|
380 |
|
|
Returns the noderefs of all nodes connected to this node. |
381 |
|
|
|
382 |
|
|
=cut |
383 |
|
|
|
384 |
|
|
sub known_nodes { |
385 |
|
|
map $_->{noderef}, _uniq_nodes |
386 |
|
|
} |
387 |
|
|
|
388 |
|
|
=item up_nodes |
389 |
|
|
|
390 |
|
|
Return the noderefs of all nodes that are currently connected (excluding |
391 |
|
|
the node itself). |
392 |
|
|
|
393 |
|
|
=cut |
394 |
|
|
|
395 |
|
|
sub up_nodes { |
396 |
|
|
map $_->{noderef}, grep $_->{transport}, _uniq_nodes |
397 |
|
|
} |
398 |
|
|
|
399 |
|
|
=item $guard = mon_nodes $callback->($noderef, $is_up, @reason) |
400 |
|
|
|
401 |
|
|
Registers a callback that is called each time a node goes up (connection |
402 |
|
|
is established) or down (connection is lost). |
403 |
|
|
|
404 |
|
|
Node up messages can only be followed by node down messages for the same |
405 |
|
|
node, and vice versa. |
406 |
|
|
|
407 |
|
|
The fucntino returns an optional guard which can be used to de-register |
408 |
|
|
the monitoring callback again. |
409 |
|
|
|
410 |
|
|
=cut |
411 |
|
|
|
412 |
|
|
our %MON_NODES; |
413 |
|
|
|
414 |
|
|
sub mon_nodes($) { |
415 |
|
|
my ($cb) = @_; |
416 |
|
|
|
417 |
|
|
$MON_NODES{$cb+0} = $cb; |
418 |
|
|
|
419 |
|
|
wantarray && AnyEvent::Util::guard { delete $MON_NODES{$cb+0} } |
420 |
|
|
} |
421 |
|
|
|
422 |
|
|
sub _inject_nodeevent($$;@) { |
423 |
|
|
my ($node, @args) = @_; |
424 |
|
|
|
425 |
|
|
unshift @args, $node->{noderef}; |
426 |
|
|
|
427 |
|
|
for my $cb (values %MON_NODES) { |
428 |
|
|
eval { $cb->(@args); 1 } |
429 |
|
|
or $WARN->($@); |
430 |
|
|
} |
431 |
|
|
} |
432 |
|
|
|
433 |
|
|
############################################################################# |
434 |
root |
1.1 |
# self node code |
435 |
|
|
|
436 |
|
|
our %node_req = ( |
437 |
|
|
# internal services |
438 |
|
|
|
439 |
|
|
# monitoring |
440 |
|
|
mon0 => sub { # disable monitoring |
441 |
|
|
my $portid = shift; |
442 |
|
|
my $node = $SRCNODE; |
443 |
|
|
$NODE{""}->unmonitor ($portid, delete $node->{rmon}{$portid}); |
444 |
|
|
}, |
445 |
|
|
mon1 => sub { # enable monitoring |
446 |
|
|
my $portid = shift; |
447 |
|
|
my $node = $SRCNODE; |
448 |
|
|
$NODE{""}->monitor ($portid, $node->{rmon}{$portid} = sub { |
449 |
|
|
$node->send (["", kil => $portid, @_]); |
450 |
|
|
}); |
451 |
|
|
}, |
452 |
|
|
kil => sub { |
453 |
|
|
my $cbs = delete $SRCNODE->{lmon}{+shift} |
454 |
|
|
or return; |
455 |
|
|
|
456 |
|
|
$_->(@_) for @$cbs; |
457 |
|
|
}, |
458 |
|
|
# node changed its name (for slave nodes) |
459 |
|
|
iam => sub { |
460 |
root |
1.8 |
# get rid of bogus slave/xxx name, hopefully |
461 |
|
|
delete $NODE{$SRCNODE->{noderef}}; |
462 |
|
|
|
463 |
|
|
# change noderef |
464 |
root |
1.1 |
$SRCNODE->{noderef} = $_[0]; |
465 |
root |
1.8 |
|
466 |
|
|
# anchor |
467 |
root |
1.1 |
$NODE{$_[0]} = $SRCNODE; |
468 |
|
|
}, |
469 |
|
|
|
470 |
|
|
# public services |
471 |
|
|
|
472 |
|
|
# relay message to another node / generic echo |
473 |
|
|
relay => sub { |
474 |
|
|
&snd; |
475 |
|
|
}, |
476 |
|
|
relay_multiple => sub { |
477 |
|
|
snd @$_ for @_ |
478 |
|
|
}, |
479 |
|
|
|
480 |
root |
1.4 |
# informational |
481 |
|
|
info => sub { |
482 |
|
|
snd @_, $NODE; |
483 |
|
|
}, |
484 |
|
|
known_nodes => sub { |
485 |
|
|
snd @_, known_nodes; |
486 |
|
|
}, |
487 |
|
|
up_nodes => sub { |
488 |
|
|
snd @_, up_nodes; |
489 |
|
|
}, |
490 |
|
|
|
491 |
root |
1.1 |
# random garbage |
492 |
|
|
eval => sub { |
493 |
|
|
my @res = eval shift; |
494 |
|
|
snd @_, "$@", @res if @_; |
495 |
|
|
}, |
496 |
|
|
time => sub { |
497 |
|
|
snd @_, AE::time; |
498 |
|
|
}, |
499 |
|
|
devnull => sub { |
500 |
|
|
# |
501 |
|
|
}, |
502 |
|
|
); |
503 |
|
|
|
504 |
|
|
$NODE{""} = $NODE{$NODE} = new AnyEvent::MP::Node::Self noderef => $NODE; |
505 |
|
|
$PORT{""} = sub { |
506 |
|
|
my $tag = shift; |
507 |
|
|
eval { &{ $node_req{$tag} ||= load_func $tag } }; |
508 |
|
|
$WARN->("error processing node message: $@") if $@; |
509 |
|
|
}; |
510 |
|
|
|
511 |
|
|
=back |
512 |
|
|
|
513 |
|
|
=head1 SEE ALSO |
514 |
|
|
|
515 |
|
|
L<AnyEvent::MP>. |
516 |
|
|
|
517 |
|
|
=head1 AUTHOR |
518 |
|
|
|
519 |
|
|
Marc Lehmann <schmorp@schmorp.de> |
520 |
|
|
http://home.schmorp.de/ |
521 |
|
|
|
522 |
|
|
=cut |
523 |
|
|
|
524 |
|
|
1 |
525 |
|
|
|