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 |
root |
1.27 |
connected nodes etc. is sought. |
17 |
root |
1.3 |
|
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 |
root |
1.16 |
use POSIX (); |
28 |
root |
1.1 |
use Carp (); |
29 |
|
|
use MIME::Base64 (); |
30 |
|
|
|
31 |
|
|
use AE (); |
32 |
|
|
|
33 |
|
|
use AnyEvent::MP::Node; |
34 |
|
|
use AnyEvent::MP::Transport; |
35 |
|
|
|
36 |
|
|
use base "Exporter"; |
37 |
|
|
|
38 |
|
|
our @EXPORT = qw( |
39 |
root |
1.13 |
%NODE %PORT %PORT_DATA $UNIQ $RUNIQ $ID |
40 |
root |
1.21 |
add_node load_func snd_to_func snd_on eval_on |
41 |
root |
1.1 |
|
42 |
root |
1.34 |
NODE $NODE node_of snd kil port_is_local |
43 |
|
|
configure |
44 |
root |
1.46 |
up_nodes mon_nodes node_is_up |
45 |
root |
1.1 |
); |
46 |
|
|
|
47 |
root |
1.16 |
=item $AnyEvent::MP::Kernel::WARN->($level, $msg) |
48 |
root |
1.1 |
|
49 |
root |
1.27 |
This value is called with an error or warning message, when e.g. a |
50 |
|
|
connection could not be created, authorisation failed and so on. |
51 |
|
|
|
52 |
|
|
It I<must not> block or send messages -queue it and use an idle watcher if |
53 |
|
|
you need to do any of these things. |
54 |
root |
1.1 |
|
55 |
elmex |
1.38 |
C<$level> should be C<0> for messages to be logged always, C<1> for |
56 |
root |
1.16 |
unexpected messages and errors, C<2> for warnings, C<7> for messages about |
57 |
|
|
node connectivity and services, C<8> for debugging messages and C<9> for |
58 |
|
|
tracing messages. |
59 |
|
|
|
60 |
root |
1.1 |
The default simply logs the message to STDERR. |
61 |
|
|
|
62 |
root |
1.44 |
=item @AnyEvent::MP::Kernel::WARN |
63 |
|
|
|
64 |
|
|
All code references in this array are called for every log message, from |
65 |
|
|
the default C<$WARN> handler. This is an easy way to tie into the log |
66 |
|
|
messages without disturbing others. |
67 |
|
|
|
68 |
root |
1.1 |
=cut |
69 |
|
|
|
70 |
root |
1.29 |
our $WARNLEVEL = exists $ENV{PERL_ANYEVENT_MP_WARNLEVEL} ? $ENV{PERL_ANYEVENT_MP_WARNLEVEL} : 5; |
71 |
root |
1.44 |
our @WARN; |
72 |
|
|
our $WARN = sub { |
73 |
|
|
&$_ for @WARN; |
74 |
root |
1.29 |
|
75 |
|
|
return if $WARNLEVEL < $_[0]; |
76 |
|
|
|
77 |
root |
1.16 |
my ($level, $msg) = @_; |
78 |
|
|
|
79 |
root |
1.1 |
$msg =~ s/\n$//; |
80 |
root |
1.16 |
|
81 |
|
|
printf STDERR "%s <%d> %s\n", |
82 |
|
|
(POSIX::strftime "%Y-%m-%d %H:%M:%S", localtime time), |
83 |
|
|
$level, |
84 |
|
|
$msg; |
85 |
root |
1.1 |
}; |
86 |
|
|
|
87 |
root |
1.29 |
=item $AnyEvent::MP::Kernel::WARNLEVEL [default 5 or $ENV{PERL_ANYEVENT_MP_WARNLEVEL}] |
88 |
|
|
|
89 |
|
|
The maximum level at which warning messages will be printed to STDERR by |
90 |
|
|
the default warn handler. |
91 |
|
|
|
92 |
|
|
=cut |
93 |
|
|
|
94 |
root |
1.6 |
sub load_func($) { |
95 |
|
|
my $func = $_[0]; |
96 |
|
|
|
97 |
|
|
unless (defined &$func) { |
98 |
|
|
my $pkg = $func; |
99 |
|
|
do { |
100 |
|
|
$pkg =~ s/::[^:]+$// |
101 |
root |
1.63 |
or return sub { die "unable to resolve function '$func'" }; |
102 |
root |
1.60 |
|
103 |
|
|
local $@; |
104 |
root |
1.61 |
unless (eval "require $pkg; 1") { |
105 |
|
|
my $error = $@; |
106 |
|
|
$error =~ /^Can't locate .*.pm in \@INC \(/ |
107 |
|
|
or return sub { die $error }; |
108 |
|
|
} |
109 |
root |
1.6 |
} until defined &$func; |
110 |
|
|
} |
111 |
|
|
|
112 |
|
|
\&$func |
113 |
|
|
} |
114 |
|
|
|
115 |
root |
1.1 |
sub nonce($) { |
116 |
|
|
my $nonce; |
117 |
|
|
|
118 |
|
|
if (open my $fh, "</dev/urandom") { |
119 |
|
|
sysread $fh, $nonce, $_[0]; |
120 |
|
|
} else { |
121 |
|
|
# shit... |
122 |
|
|
$nonce = join "", map +(chr rand 256), 1 .. $_[0] |
123 |
|
|
} |
124 |
|
|
|
125 |
|
|
$nonce |
126 |
|
|
} |
127 |
|
|
|
128 |
root |
1.21 |
sub alnumbits($) { |
129 |
root |
1.1 |
my $data = $_[0]; |
130 |
|
|
|
131 |
|
|
if (eval "use Math::GMP 2.05; 1") { |
132 |
|
|
$data = Math::GMP::get_str_gmp ( |
133 |
|
|
(Math::GMP::new_from_scalar_with_base (+(unpack "H*", $data), 16)), |
134 |
|
|
62 |
135 |
|
|
); |
136 |
|
|
} else { |
137 |
|
|
$data = MIME::Base64::encode_base64 $data, ""; |
138 |
|
|
$data =~ s/=//; |
139 |
root |
1.31 |
$data =~ s/x/x0/g; |
140 |
|
|
$data =~ s/\//x1/g; |
141 |
|
|
$data =~ s/\+/x2/g; |
142 |
root |
1.1 |
} |
143 |
|
|
|
144 |
|
|
$data |
145 |
|
|
} |
146 |
|
|
|
147 |
|
|
sub gen_uniq { |
148 |
root |
1.36 |
alnumbits pack "nna*", $$ & 0xffff, time & 0xffff, nonce 2 |
149 |
root |
1.1 |
} |
150 |
|
|
|
151 |
root |
1.20 |
our $CONFIG; # this node's configuration |
152 |
root |
1.21 |
|
153 |
root |
1.64 |
our $RUNIQ; # remote uniq value |
154 |
|
|
our $UNIQ; # per-process/node unique cookie |
155 |
|
|
our $NODE; |
156 |
|
|
our $ID = "a"; |
157 |
root |
1.1 |
|
158 |
|
|
our %NODE; # node id to transport mapping, or "undef", for local node |
159 |
|
|
our (%PORT, %PORT_DATA); # local ports |
160 |
|
|
|
161 |
root |
1.21 |
our %RMON; # local ports monitored by remote nodes ($RMON{nodeid}{portid} == cb) |
162 |
root |
1.1 |
our %LMON; # monitored _local_ ports |
163 |
|
|
|
164 |
|
|
our %LISTENER; |
165 |
root |
1.21 |
our $LISTENER; # our listeners, as arrayref |
166 |
root |
1.1 |
|
167 |
|
|
our $SRCNODE; # holds the sending node during _inject |
168 |
|
|
|
169 |
root |
1.69 |
sub _init_names { |
170 |
root |
1.64 |
$RUNIQ = alnumbits nonce 96/8; |
171 |
|
|
$UNIQ = gen_uniq; |
172 |
|
|
$NODE = "anon/$RUNIQ"; |
173 |
|
|
} |
174 |
|
|
|
175 |
root |
1.69 |
_init_names; |
176 |
root |
1.64 |
|
177 |
root |
1.1 |
sub NODE() { |
178 |
|
|
$NODE |
179 |
|
|
} |
180 |
|
|
|
181 |
|
|
sub node_of($) { |
182 |
root |
1.21 |
my ($node, undef) = split /#/, $_[0], 2; |
183 |
root |
1.1 |
|
184 |
root |
1.21 |
$node |
185 |
root |
1.1 |
} |
186 |
|
|
|
187 |
root |
1.17 |
BEGIN { |
188 |
|
|
*TRACE = $ENV{PERL_ANYEVENT_MP_TRACE} |
189 |
|
|
? sub () { 1 } |
190 |
|
|
: sub () { 0 }; |
191 |
|
|
} |
192 |
root |
1.1 |
|
193 |
root |
1.42 |
our $DELAY_TIMER; |
194 |
|
|
our @DELAY_QUEUE; |
195 |
|
|
|
196 |
|
|
sub _delay_run { |
197 |
root |
1.55 |
(shift @DELAY_QUEUE or return undef $DELAY_TIMER)->() while 1; |
198 |
root |
1.42 |
} |
199 |
|
|
|
200 |
|
|
sub delay($) { |
201 |
|
|
push @DELAY_QUEUE, shift; |
202 |
|
|
$DELAY_TIMER ||= AE::timer 0, 0, \&_delay_run; |
203 |
|
|
} |
204 |
|
|
|
205 |
root |
1.1 |
sub _inject { |
206 |
root |
1.48 |
warn "RCV $SRCNODE->{id} -> " . eval { JSON::XS->new->encode (\@_) } . "\n" if TRACE && @_;#d# |
207 |
root |
1.1 |
&{ $PORT{+shift} or return }; |
208 |
|
|
} |
209 |
|
|
|
210 |
root |
1.20 |
# this function adds a node-ref, so you can send stuff to it |
211 |
|
|
# it is basically the central routing component. |
212 |
root |
1.1 |
sub add_node { |
213 |
root |
1.21 |
my ($node) = @_; |
214 |
root |
1.1 |
|
215 |
root |
1.21 |
$NODE{$node} ||= new AnyEvent::MP::Node::Direct $node |
216 |
root |
1.13 |
} |
217 |
|
|
|
218 |
root |
1.1 |
sub snd(@) { |
219 |
root |
1.21 |
my ($nodeid, $portid) = split /#/, shift, 2; |
220 |
root |
1.1 |
|
221 |
root |
1.48 |
warn "SND $nodeid <- " . eval { JSON::XS->new->encode (\@_) } . "\n" if TRACE && @_;#d# |
222 |
root |
1.1 |
|
223 |
root |
1.49 |
defined $nodeid #d#UGLY |
224 |
|
|
or Carp::croak "'undef' is not a valid node ID/port ID"; |
225 |
|
|
|
226 |
root |
1.21 |
($NODE{$nodeid} || add_node $nodeid) |
227 |
root |
1.2 |
->{send} (["$portid", @_]); |
228 |
root |
1.1 |
} |
229 |
|
|
|
230 |
root |
1.17 |
=item $is_local = port_is_local $port |
231 |
|
|
|
232 |
|
|
Returns true iff the port is a local port. |
233 |
|
|
|
234 |
|
|
=cut |
235 |
|
|
|
236 |
|
|
sub port_is_local($) { |
237 |
root |
1.21 |
my ($nodeid, undef) = split /#/, $_[0], 2; |
238 |
root |
1.17 |
|
239 |
root |
1.21 |
$NODE{$nodeid} == $NODE{""} |
240 |
root |
1.17 |
} |
241 |
|
|
|
242 |
root |
1.18 |
=item snd_to_func $node, $func, @args |
243 |
root |
1.11 |
|
244 |
root |
1.21 |
Expects a node ID and a name of a function. Asynchronously tries to call |
245 |
root |
1.11 |
this function with the given arguments on that node. |
246 |
|
|
|
247 |
root |
1.20 |
This function can be used to implement C<spawn>-like interfaces. |
248 |
root |
1.11 |
|
249 |
|
|
=cut |
250 |
|
|
|
251 |
root |
1.18 |
sub snd_to_func($$;@) { |
252 |
root |
1.21 |
my $nodeid = shift; |
253 |
root |
1.11 |
|
254 |
root |
1.41 |
# on $NODE, we artificially delay... (for spawn) |
255 |
|
|
# this is very ugly - maybe we should simply delay ALL messages, |
256 |
|
|
# to avoid deep recursion issues. but that's so... slow... |
257 |
root |
1.45 |
$AnyEvent::MP::Node::Self::DELAY = 1 |
258 |
|
|
if $nodeid ne $NODE; |
259 |
|
|
|
260 |
root |
1.49 |
defined $nodeid #d#UGLY |
261 |
|
|
or Carp::croak "'undef' is not a valid node ID/port ID"; |
262 |
|
|
|
263 |
root |
1.45 |
($NODE{$nodeid} || add_node $nodeid)->send (["", @_]); |
264 |
root |
1.11 |
} |
265 |
|
|
|
266 |
root |
1.18 |
=item snd_on $node, @msg |
267 |
|
|
|
268 |
|
|
Executes C<snd> with the given C<@msg> (which must include the destination |
269 |
|
|
port) on the given node. |
270 |
|
|
|
271 |
|
|
=cut |
272 |
|
|
|
273 |
|
|
sub snd_on($@) { |
274 |
|
|
my $node = shift; |
275 |
|
|
snd $node, snd => @_; |
276 |
|
|
} |
277 |
|
|
|
278 |
root |
1.29 |
=item eval_on $node, $string[, @reply] |
279 |
root |
1.18 |
|
280 |
root |
1.29 |
Evaluates the given string as Perl expression on the given node. When |
281 |
|
|
@reply is specified, then it is used to construct a reply message with |
282 |
|
|
C<"$@"> and any results from the eval appended. |
283 |
root |
1.18 |
|
284 |
|
|
=cut |
285 |
|
|
|
286 |
root |
1.29 |
sub eval_on($$;@) { |
287 |
root |
1.18 |
my $node = shift; |
288 |
|
|
snd $node, eval => @_; |
289 |
|
|
} |
290 |
|
|
|
291 |
root |
1.1 |
sub kil(@) { |
292 |
root |
1.21 |
my ($nodeid, $portid) = split /#/, shift, 2; |
293 |
root |
1.1 |
|
294 |
|
|
length $portid |
295 |
root |
1.21 |
or Carp::croak "$nodeid#$portid: killing a node port is not allowed, caught"; |
296 |
root |
1.1 |
|
297 |
root |
1.21 |
($NODE{$nodeid} || add_node $nodeid) |
298 |
root |
1.1 |
->kill ("$portid", @_); |
299 |
|
|
} |
300 |
|
|
|
301 |
|
|
############################################################################# |
302 |
root |
1.6 |
# node monitoring and info |
303 |
root |
1.3 |
|
304 |
root |
1.21 |
=item node_is_known $nodeid |
305 |
root |
1.13 |
|
306 |
root |
1.46 |
Returns true iff the given node is currently known to the system. The only |
307 |
root |
1.69 |
time a node is known but not up currently is when a connection request is |
308 |
root |
1.46 |
pending. |
309 |
root |
1.13 |
|
310 |
|
|
=cut |
311 |
|
|
|
312 |
|
|
sub node_is_known($) { |
313 |
|
|
exists $NODE{$_[0]} |
314 |
|
|
} |
315 |
|
|
|
316 |
root |
1.21 |
=item node_is_up $nodeid |
317 |
root |
1.13 |
|
318 |
|
|
Returns true if the given node is "up", that is, the kernel thinks it has |
319 |
|
|
a working connection to it. |
320 |
|
|
|
321 |
root |
1.69 |
If the node is known (to this local node) but not currently connected, |
322 |
|
|
returns C<0>. If the node is not known, returns C<undef>. |
323 |
root |
1.13 |
|
324 |
|
|
=cut |
325 |
|
|
|
326 |
|
|
sub node_is_up($) { |
327 |
|
|
($NODE{$_[0]} or return)->{transport} |
328 |
|
|
? 1 : 0 |
329 |
|
|
} |
330 |
|
|
|
331 |
root |
1.3 |
=item known_nodes |
332 |
|
|
|
333 |
root |
1.26 |
Returns the node IDs of all nodes currently known to this node, including |
334 |
|
|
itself and nodes not currently connected. |
335 |
root |
1.3 |
|
336 |
|
|
=cut |
337 |
|
|
|
338 |
root |
1.49 |
sub known_nodes() { |
339 |
root |
1.26 |
map $_->{id}, values %NODE |
340 |
root |
1.3 |
} |
341 |
|
|
|
342 |
|
|
=item up_nodes |
343 |
|
|
|
344 |
root |
1.26 |
Return the node IDs of all nodes that are currently connected (excluding |
345 |
|
|
the node itself). |
346 |
root |
1.3 |
|
347 |
|
|
=cut |
348 |
|
|
|
349 |
root |
1.49 |
sub up_nodes() { |
350 |
root |
1.26 |
map $_->{id}, grep $_->{transport}, values %NODE |
351 |
root |
1.3 |
} |
352 |
|
|
|
353 |
root |
1.21 |
=item $guard = mon_nodes $callback->($nodeid, $is_up, @reason) |
354 |
root |
1.3 |
|
355 |
root |
1.27 |
Registers a callback that is called each time a node goes up (a connection |
356 |
|
|
is established) or down (the connection is lost). |
357 |
root |
1.3 |
|
358 |
|
|
Node up messages can only be followed by node down messages for the same |
359 |
|
|
node, and vice versa. |
360 |
|
|
|
361 |
root |
1.27 |
Note that monitoring a node is usually better done by monitoring it's node |
362 |
|
|
port. This function is mainly of interest to modules that are concerned |
363 |
|
|
about the network topology and low-level connection handling. |
364 |
|
|
|
365 |
|
|
Callbacks I<must not> block and I<should not> send any messages. |
366 |
|
|
|
367 |
|
|
The function returns an optional guard which can be used to unregister |
368 |
root |
1.3 |
the monitoring callback again. |
369 |
|
|
|
370 |
root |
1.46 |
Example: make sure you call function C<newnode> for all nodes that are up |
371 |
|
|
or go up (and down). |
372 |
|
|
|
373 |
|
|
newnode $_, 1 for up_nodes; |
374 |
|
|
mon_nodes \&newnode; |
375 |
|
|
|
376 |
root |
1.3 |
=cut |
377 |
|
|
|
378 |
|
|
our %MON_NODES; |
379 |
|
|
|
380 |
|
|
sub mon_nodes($) { |
381 |
|
|
my ($cb) = @_; |
382 |
|
|
|
383 |
|
|
$MON_NODES{$cb+0} = $cb; |
384 |
|
|
|
385 |
root |
1.62 |
defined wantarray && AnyEvent::Util::guard { delete $MON_NODES{$cb+0} } |
386 |
root |
1.3 |
} |
387 |
|
|
|
388 |
|
|
sub _inject_nodeevent($$;@) { |
389 |
root |
1.16 |
my ($node, $up, @reason) = @_; |
390 |
root |
1.3 |
|
391 |
|
|
for my $cb (values %MON_NODES) { |
392 |
root |
1.21 |
eval { $cb->($node->{id}, $up, @reason); 1 } |
393 |
root |
1.16 |
or $WARN->(1, $@); |
394 |
root |
1.3 |
} |
395 |
root |
1.16 |
|
396 |
root |
1.21 |
$WARN->(7, "$node->{id} is " . ($up ? "up" : "down") . " (@reason)"); |
397 |
root |
1.3 |
} |
398 |
|
|
|
399 |
|
|
############################################################################# |
400 |
root |
1.1 |
# self node code |
401 |
|
|
|
402 |
root |
1.67 |
sub _kill { |
403 |
|
|
my $port = shift; |
404 |
|
|
|
405 |
|
|
delete $PORT{$port} |
406 |
|
|
or return; # killing nonexistent ports is O.K. |
407 |
|
|
delete $PORT_DATA{$port}; |
408 |
|
|
|
409 |
|
|
my $mon = delete $LMON{$port} |
410 |
|
|
or !@_ |
411 |
|
|
or $WARN->(2, "unmonitored local port $port died with reason: @_"); |
412 |
|
|
|
413 |
|
|
$_->(@_) for values %$mon; |
414 |
|
|
} |
415 |
|
|
|
416 |
|
|
sub _monitor { |
417 |
|
|
return $_[2](no_such_port => "cannot monitor nonexistent port", "$NODE#$_[1]") |
418 |
|
|
unless exists $PORT{$_[1]}; |
419 |
|
|
|
420 |
|
|
$LMON{$_[1]}{$_[2]+0} = $_[2]; |
421 |
|
|
} |
422 |
|
|
|
423 |
|
|
sub _unmonitor { |
424 |
root |
1.68 |
delete $LMON{$_[1]}{$_[2]+0} |
425 |
|
|
if exists $LMON{$_[1]}; |
426 |
root |
1.67 |
} |
427 |
|
|
|
428 |
root |
1.1 |
our %node_req = ( |
429 |
|
|
# internal services |
430 |
|
|
|
431 |
|
|
# monitoring |
432 |
root |
1.65 |
mon0 => sub { # stop monitoring a port for another node |
433 |
root |
1.1 |
my $portid = shift; |
434 |
root |
1.67 |
_unmonitor undef, $portid, delete $SRCNODE->{rmon}{$portid}; |
435 |
root |
1.1 |
}, |
436 |
root |
1.65 |
mon1 => sub { # start monitoring a port for another node |
437 |
root |
1.1 |
my $portid = shift; |
438 |
root |
1.67 |
Scalar::Util::weaken (my $node = $SRCNODE); |
439 |
|
|
_monitor undef, $portid, $node->{rmon}{$portid} = sub { |
440 |
root |
1.58 |
delete $node->{rmon}{$portid}; |
441 |
root |
1.65 |
$node->send (["", kil0 => $portid, @_]) |
442 |
root |
1.59 |
if $node && $node->{transport}; |
443 |
root |
1.67 |
}; |
444 |
root |
1.1 |
}, |
445 |
root |
1.65 |
# another node has killed a monitored port |
446 |
|
|
kil0 => sub { |
447 |
root |
1.1 |
my $cbs = delete $SRCNODE->{lmon}{+shift} |
448 |
|
|
or return; |
449 |
|
|
|
450 |
|
|
$_->(@_) for @$cbs; |
451 |
|
|
}, |
452 |
|
|
|
453 |
root |
1.18 |
# "public" services - not actually public |
454 |
root |
1.1 |
|
455 |
root |
1.65 |
# another node wants to kill a local port |
456 |
root |
1.66 |
kil => \&_kill, |
457 |
root |
1.65 |
|
458 |
root |
1.1 |
# relay message to another node / generic echo |
459 |
root |
1.15 |
snd => \&snd, |
460 |
root |
1.27 |
snd_multiple => sub { |
461 |
root |
1.1 |
snd @$_ for @_ |
462 |
|
|
}, |
463 |
|
|
|
464 |
root |
1.4 |
# informational |
465 |
|
|
info => sub { |
466 |
|
|
snd @_, $NODE; |
467 |
|
|
}, |
468 |
|
|
known_nodes => sub { |
469 |
|
|
snd @_, known_nodes; |
470 |
|
|
}, |
471 |
|
|
up_nodes => sub { |
472 |
|
|
snd @_, up_nodes; |
473 |
|
|
}, |
474 |
|
|
|
475 |
root |
1.30 |
# random utilities |
476 |
root |
1.1 |
eval => sub { |
477 |
root |
1.50 |
my @res = do { package main; eval shift }; |
478 |
root |
1.1 |
snd @_, "$@", @res if @_; |
479 |
|
|
}, |
480 |
|
|
time => sub { |
481 |
|
|
snd @_, AE::time; |
482 |
|
|
}, |
483 |
|
|
devnull => sub { |
484 |
|
|
# |
485 |
|
|
}, |
486 |
root |
1.15 |
"" => sub { |
487 |
root |
1.27 |
# empty messages are keepalives or similar devnull-applications |
488 |
root |
1.15 |
}, |
489 |
root |
1.1 |
); |
490 |
|
|
|
491 |
root |
1.18 |
$NODE{""} = $NODE{$NODE} = new AnyEvent::MP::Node::Self $NODE; |
492 |
root |
1.1 |
$PORT{""} = sub { |
493 |
|
|
my $tag = shift; |
494 |
|
|
eval { &{ $node_req{$tag} ||= load_func $tag } }; |
495 |
root |
1.16 |
$WARN->(2, "error processing node message: $@") if $@; |
496 |
root |
1.1 |
}; |
497 |
|
|
|
498 |
root |
1.69 |
############################################################################# |
499 |
|
|
# seed management, try to keep connections to all seeds |
500 |
|
|
|
501 |
|
|
our %SEED_NODE; # seed ID => node ID|undef |
502 |
|
|
our %NODE_SEED; # map node ID to seed ID |
503 |
|
|
our %SEED_CONNECT; # $seed => transport_connector | 1=connected | 2=connecting |
504 |
|
|
our $SEED_WATCHER; |
505 |
|
|
|
506 |
|
|
# called before sending the greeting, grabs address we connect to |
507 |
|
|
push @AnyEvent::MP::Transport::HOOK_CONNECT, sub { |
508 |
|
|
defined (my $seed = $_[0]{seed}) |
509 |
|
|
or return; |
510 |
|
|
|
511 |
|
|
$SEED_CONNECT{$seed} = 2; |
512 |
|
|
}; |
513 |
|
|
|
514 |
|
|
# called after receiving remote greeting, grabs remote node name |
515 |
|
|
push @AnyEvent::MP::Transport::HOOK_GREETING, sub { |
516 |
|
|
defined (my $seed = $_[0]{seed}) |
517 |
|
|
or return; |
518 |
|
|
|
519 |
|
|
# we rely on untrusted data here (the remote node name) this is |
520 |
|
|
# hopefully ok, as this can at most be used for DOSing, which is easy |
521 |
|
|
# when you can do MITM anyway. |
522 |
|
|
|
523 |
|
|
# if we connect to ourselves, nuke this seed |
524 |
|
|
if ($_[0]{remote_node} eq $AnyEvent::MP::Kernel::NODE) { |
525 |
|
|
delete $SEED_NODE{$_[0]{seed}}; |
526 |
|
|
delete $NODE_SEED{$_[0]{seed}}; |
527 |
|
|
} else { |
528 |
|
|
$SEED_NODE{$seed} = $_[0]{remote_node}; |
529 |
|
|
$NODE_SEED{$_[0]{remote_node}} = $seed; |
530 |
|
|
} |
531 |
|
|
}; |
532 |
|
|
|
533 |
|
|
## called when connection is up, same as above, but now verified |
534 |
|
|
#push @AnyEvent::MP::Transport::HOOK_CONNECTED, sub { |
535 |
|
|
# defined (my $seed = $_[0]{seed}) |
536 |
|
|
# or return; |
537 |
|
|
# AE::log 5, "connected($seed)\n";#d# |
538 |
|
|
# |
539 |
|
|
# $SEED_NODE{$seed} = $_[0]{remote_node}; |
540 |
|
|
# $NODE_SEED{$_[0]{remote_node}} = $seed; |
541 |
|
|
#}; |
542 |
|
|
|
543 |
|
|
# called when connections get destroyed, update our data structures |
544 |
|
|
# and check for self-connects |
545 |
|
|
push @AnyEvent::MP::Transport::HOOK_DESTROY, sub { |
546 |
|
|
# if we lost the connection to a seed node, make sure we start seeding |
547 |
|
|
seed_again ()#d# |
548 |
|
|
if exists $NODE_SEED{ $_[0]{remote_node} }; |
549 |
|
|
|
550 |
|
|
defined (my $seed = $_[0]{seed}) |
551 |
|
|
or return; |
552 |
|
|
|
553 |
|
|
delete $SEED_CONNECT{$seed}; |
554 |
|
|
}; |
555 |
|
|
|
556 |
|
|
sub seed_connect { |
557 |
|
|
my ($seed) = @_; |
558 |
|
|
|
559 |
|
|
my ($host, $port) = AnyEvent::Socket::parse_hostport $seed |
560 |
|
|
or Carp::croak "$seed: unparsable seed address"; |
561 |
|
|
|
562 |
|
|
$AnyEvent::MP::Kernel::WARN->(9, "trying connect to seed node $seed."); |
563 |
|
|
|
564 |
|
|
# ughhh |
565 |
|
|
$SEED_CONNECT{$seed} ||= AnyEvent::MP::Transport::mp_connect $host, $port, |
566 |
|
|
seed => $seed, |
567 |
|
|
sub { |
568 |
|
|
$SEED_CONNECT{$seed} = 1; |
569 |
|
|
}, |
570 |
|
|
; |
571 |
|
|
} |
572 |
|
|
|
573 |
|
|
sub seed_all { |
574 |
|
|
# my $next = List::Util::max 1, |
575 |
|
|
# $AnyEvent::MP::Kernel::CONFIG->{connect_interval} |
576 |
|
|
# * ($nodecnt ? keys %AnyEvent::MP::Kernel::NODE : 1) |
577 |
|
|
# - rand; |
578 |
|
|
|
579 |
|
|
my @seeds = grep { |
580 |
|
|
!exists $SEED_CONNECT{$_} |
581 |
|
|
&& !(defined $SEED_NODE{$_} && node_is_up $SEED_NODE{$_}) |
582 |
|
|
} keys %SEED_NODE; |
583 |
|
|
|
584 |
|
|
if (@seeds) { |
585 |
|
|
# start conenction attempt for every seed we are not connected to yet |
586 |
|
|
seed_connect $_ |
587 |
|
|
for @seeds; |
588 |
|
|
} else { |
589 |
|
|
# all seeds connected or connecting |
590 |
|
|
undef $SEED_WATCHER; |
591 |
|
|
} |
592 |
|
|
} |
593 |
|
|
|
594 |
|
|
sub seed_again { |
595 |
|
|
$SEED_WATCHER ||= AE::timer 0, $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout}, \&seed_all; |
596 |
|
|
} |
597 |
|
|
|
598 |
|
|
# sets new seed list, starts connecting |
599 |
|
|
sub set_seeds(@) { |
600 |
|
|
%SEED_NODE = (); |
601 |
|
|
@SEED_NODE{@_} = (); |
602 |
|
|
|
603 |
|
|
seed_again; |
604 |
|
|
} |
605 |
|
|
|
606 |
|
|
############################################################################# |
607 |
|
|
# configure |
608 |
|
|
|
609 |
|
|
sub _nodename { |
610 |
|
|
require POSIX; |
611 |
|
|
(POSIX::uname ())[1] |
612 |
|
|
} |
613 |
|
|
|
614 |
|
|
sub _resolve($) { |
615 |
|
|
my ($nodeid) = @_; |
616 |
|
|
|
617 |
|
|
my $cv = AE::cv; |
618 |
|
|
my @res; |
619 |
|
|
|
620 |
|
|
$cv->begin (sub { |
621 |
|
|
my %seen; |
622 |
|
|
my @refs; |
623 |
|
|
for (sort { $a->[0] <=> $b->[0] } @res) { |
624 |
|
|
push @refs, $_->[1] unless $seen{$_->[1]}++ |
625 |
|
|
} |
626 |
|
|
shift->send (@refs); |
627 |
|
|
}); |
628 |
|
|
|
629 |
|
|
my $idx; |
630 |
|
|
for my $t (split /,/, $nodeid) { |
631 |
|
|
my $pri = ++$idx; |
632 |
|
|
|
633 |
|
|
$t = length $t ? _nodename . ":$t" : _nodename |
634 |
|
|
if $t =~ /^\d*$/; |
635 |
|
|
|
636 |
|
|
my ($host, $port) = AnyEvent::Socket::parse_hostport $t, 0 |
637 |
|
|
or Carp::croak "$t: unparsable transport descriptor"; |
638 |
|
|
|
639 |
|
|
$port = "0" if $port eq "*"; |
640 |
|
|
|
641 |
|
|
if ($host eq "*") { |
642 |
|
|
$cv->begin; |
643 |
|
|
# use fork_call, as Net::Interface is big, and we need it rarely. |
644 |
|
|
require AnyEvent::Util; |
645 |
|
|
AnyEvent::Util::fork_call ( |
646 |
|
|
sub { |
647 |
|
|
my @addr; |
648 |
|
|
|
649 |
|
|
require Net::Interface; |
650 |
|
|
|
651 |
|
|
for my $if (Net::Interface->interfaces) { |
652 |
|
|
# we statically lower-prioritise ipv6 here, TODO :() |
653 |
|
|
for $_ ($if->address (Net::Interface::AF_INET ())) { |
654 |
|
|
next if /^\x7f/; # skip localhost etc. |
655 |
|
|
push @addr, $_; |
656 |
|
|
} |
657 |
|
|
for ($if->address (Net::Interface::AF_INET6 ())) { |
658 |
|
|
#next if $if->scope ($_) <= 2; |
659 |
|
|
next unless /^[\x20-\x3f\xfc\xfd]/; # global unicast, site-local unicast |
660 |
|
|
push @addr, $_; |
661 |
|
|
} |
662 |
|
|
|
663 |
|
|
} |
664 |
|
|
@addr |
665 |
|
|
}, sub { |
666 |
|
|
for my $ip (@_) { |
667 |
|
|
push @res, [ |
668 |
|
|
$pri += 1e-5, |
669 |
|
|
AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $ip, $port |
670 |
|
|
]; |
671 |
|
|
} |
672 |
|
|
$cv->end; |
673 |
|
|
} |
674 |
|
|
); |
675 |
|
|
} else { |
676 |
|
|
$cv->begin; |
677 |
|
|
AnyEvent::Socket::resolve_sockaddr $host, $port, "tcp", 0, undef, sub { |
678 |
|
|
for (@_) { |
679 |
|
|
my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3]; |
680 |
|
|
push @res, [ |
681 |
|
|
$pri += 1e-5, |
682 |
|
|
AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service |
683 |
|
|
]; |
684 |
|
|
} |
685 |
|
|
$cv->end; |
686 |
|
|
}; |
687 |
|
|
} |
688 |
|
|
} |
689 |
|
|
|
690 |
|
|
$cv->end; |
691 |
|
|
|
692 |
|
|
$cv |
693 |
|
|
} |
694 |
|
|
|
695 |
|
|
sub configure(@) { |
696 |
|
|
unshift @_, "profile" if @_ & 1; |
697 |
|
|
my (%kv) = @_; |
698 |
|
|
|
699 |
|
|
delete $NODE{$NODE}; # we do not support doing stuff before configure |
700 |
|
|
_init_names; |
701 |
|
|
|
702 |
|
|
my $profile = delete $kv{profile}; |
703 |
|
|
|
704 |
|
|
$profile = _nodename |
705 |
|
|
unless defined $profile; |
706 |
|
|
|
707 |
|
|
$CONFIG = AnyEvent::MP::Config::find_profile $profile, %kv; |
708 |
|
|
|
709 |
|
|
my $node = exists $CONFIG->{nodeid} ? $CONFIG->{nodeid} : $profile; |
710 |
|
|
|
711 |
|
|
$node or Carp::croak "$node: illegal node ID (see AnyEvent::MP manpage for syntax)\n"; |
712 |
|
|
|
713 |
|
|
$NODE = $node |
714 |
|
|
unless $node eq "anon/"; |
715 |
|
|
|
716 |
|
|
$NODE{$NODE} = $NODE{""}; |
717 |
|
|
$NODE{$NODE}{id} = $NODE; |
718 |
|
|
|
719 |
|
|
my $seeds = $CONFIG->{seeds}; |
720 |
|
|
my $binds = $CONFIG->{binds}; |
721 |
|
|
|
722 |
|
|
$binds ||= ["*"]; |
723 |
|
|
|
724 |
|
|
$WARN->(8, "node $NODE starting up."); |
725 |
|
|
|
726 |
|
|
$LISTENER = []; |
727 |
|
|
%LISTENER = (); |
728 |
|
|
|
729 |
|
|
for (map _resolve $_, @$binds) { |
730 |
|
|
for my $bind ($_->recv) { |
731 |
|
|
my ($host, $port) = AnyEvent::Socket::parse_hostport $bind |
732 |
|
|
or Carp::croak "$bind: unparsable local bind address"; |
733 |
|
|
|
734 |
|
|
my $listener = AnyEvent::MP::Transport::mp_server |
735 |
|
|
$host, |
736 |
|
|
$port, |
737 |
|
|
prepare => sub { |
738 |
|
|
my (undef, $host, $port) = @_; |
739 |
|
|
$bind = AnyEvent::Socket::format_hostport $host, $port; |
740 |
|
|
0 |
741 |
|
|
}, |
742 |
|
|
; |
743 |
|
|
$LISTENER{$bind} = $listener; |
744 |
|
|
push @$LISTENER, $bind; |
745 |
|
|
} |
746 |
|
|
} |
747 |
|
|
|
748 |
|
|
$WARN->(8, "node listens on [@$LISTENER]."); |
749 |
|
|
|
750 |
|
|
# the global service is mandatory currently |
751 |
|
|
require AnyEvent::MP::Global; |
752 |
|
|
|
753 |
|
|
# connect to all seednodes |
754 |
|
|
set_seeds map $_->recv, map _resolve $_, @$seeds; |
755 |
|
|
|
756 |
|
|
for (@{ $CONFIG->{services} }) { |
757 |
|
|
if (ref) { |
758 |
|
|
my ($func, @args) = @$_; |
759 |
|
|
(load_func $func)->(@args); |
760 |
|
|
} elsif (s/::$//) { |
761 |
|
|
eval "require $_"; |
762 |
|
|
die $@ if $@; |
763 |
|
|
} else { |
764 |
|
|
(load_func $_)->(); |
765 |
|
|
} |
766 |
|
|
} |
767 |
|
|
} |
768 |
|
|
|
769 |
root |
1.1 |
=back |
770 |
|
|
|
771 |
|
|
=head1 SEE ALSO |
772 |
|
|
|
773 |
|
|
L<AnyEvent::MP>. |
774 |
|
|
|
775 |
|
|
=head1 AUTHOR |
776 |
|
|
|
777 |
|
|
Marc Lehmann <schmorp@schmorp.de> |
778 |
|
|
http://home.schmorp.de/ |
779 |
|
|
|
780 |
|
|
=cut |
781 |
|
|
|
782 |
|
|
1 |
783 |
|
|
|