… | |
… | |
4 | |
4 | |
5 | =head1 SYNOPSIS |
5 | =head1 SYNOPSIS |
6 | |
6 | |
7 | use AnyEvent::MP; |
7 | use AnyEvent::MP; |
8 | |
8 | |
|
|
9 | NODE # returns this node identifier |
|
|
10 | $NODE # contains this node identifier |
|
|
11 | |
|
|
12 | snd $port, type => data...; |
|
|
13 | |
|
|
14 | rcv $port, smartmatch => $cb->($port, @msg); |
|
|
15 | |
|
|
16 | # examples: |
|
|
17 | rcv $port2, ping => sub { snd $_[0], "pong"; 0 }; |
|
|
18 | rcv $port1, pong => sub { warn "pong received\n" }; |
|
|
19 | snd $port2, ping => $port1; |
|
|
20 | |
|
|
21 | # more, smarter, matches (_any_ is exported by this module) |
|
|
22 | rcv $port, [child_died => $pid] => sub { ... |
|
|
23 | rcv $port, [_any_, _any_, 3] => sub { .. $_[2] is 3 |
|
|
24 | |
9 | =head1 DESCRIPTION |
25 | =head1 DESCRIPTION |
10 | |
26 | |
|
|
27 | This module (-family) implements a simple message passing framework. |
|
|
28 | |
|
|
29 | Despite its simplicity, you can securely message other processes running |
|
|
30 | on the same or other hosts. |
|
|
31 | |
|
|
32 | =head1 CONCEPTS |
|
|
33 | |
|
|
34 | =over 4 |
|
|
35 | |
|
|
36 | =item port |
|
|
37 | |
|
|
38 | A port is something you can send messages to with the C<snd> function, and |
|
|
39 | you can register C<rcv> handlers with. All C<rcv> handlers will receive |
|
|
40 | messages they match, messages will not be queued. |
|
|
41 | |
|
|
42 | =item port id - C<pid@host#portname> |
|
|
43 | |
|
|
44 | A port id is always the node id, a hash-mark (C<#>) as separator, followed |
|
|
45 | by a port name. |
|
|
46 | |
|
|
47 | A port name can be a well known port (basically an identifier/bareword), |
|
|
48 | or a generated name, consisting of node id, a dot (C<.>), and an |
|
|
49 | identifier. |
|
|
50 | |
|
|
51 | =item node |
|
|
52 | |
|
|
53 | A node is a single process containing at least one port - the node |
|
|
54 | port. You can send messages to node ports to let them create new ports, |
|
|
55 | among other things. |
|
|
56 | |
|
|
57 | Initially, nodes are either private (single-process only) or hidden |
|
|
58 | (connected to a father node only). Only when they epxlicitly "go public" |
|
|
59 | can you send them messages form unrelated other nodes. |
|
|
60 | |
|
|
61 | Public nodes automatically connect to all other public nodes in a network |
|
|
62 | when they connect, creating a full mesh. |
|
|
63 | |
|
|
64 | =item node id - C<host:port>, C<id@host>, C<id> |
|
|
65 | |
|
|
66 | A node ID is a string that either uniquely identifies a given node (For |
|
|
67 | private and hidden nodes), or contains a recipe on how to reach a given |
|
|
68 | node (for public nodes). |
|
|
69 | |
|
|
70 | =back |
|
|
71 | |
|
|
72 | =head1 FUNCTIONS |
|
|
73 | |
|
|
74 | =over 4 |
|
|
75 | |
11 | =cut |
76 | =cut |
12 | |
77 | |
13 | package AnyEvent::MP; |
78 | package AnyEvent::MP; |
14 | |
79 | |
|
|
80 | use AnyEvent::MP::Util (); |
|
|
81 | use AnyEvent::MP::Node; |
|
|
82 | use AnyEvent::MP::Transport; |
|
|
83 | |
|
|
84 | use utf8; |
15 | use common::sense; |
85 | use common::sense; |
16 | |
86 | |
|
|
87 | use Carp (); |
|
|
88 | |
17 | use AE (); |
89 | use AE (); |
18 | |
90 | |
|
|
91 | use base "Exporter"; |
|
|
92 | |
19 | our $VERSION = '0.0'; |
93 | our $VERSION = '0.0'; |
20 | |
94 | our @EXPORT = qw(NODE $NODE $PORT snd rcv _any_); |
21 | sub nonce($) { |
|
|
22 | my $nonce; |
|
|
23 | |
|
|
24 | if (open my $fh, "</dev/urandom") { |
|
|
25 | sysread $fh, $nonce, $_[0]; |
|
|
26 | } else { |
|
|
27 | # shit... |
|
|
28 | our $nonce_init; |
|
|
29 | unless ($nonce_init++) { |
|
|
30 | srand time ^ $$ ^ unpack "%L*", qx"ps -edalf" . qx"ipconfig /all"; |
|
|
31 | } |
|
|
32 | |
|
|
33 | $nonce = join "", map +(chr rand 256), 1 .. $_[0] |
|
|
34 | } |
|
|
35 | |
|
|
36 | $nonce |
|
|
37 | } |
|
|
38 | |
95 | |
39 | our $DEFAULT_SECRET; |
96 | our $DEFAULT_SECRET; |
|
|
97 | our $DEFAULT_PORT = "4040"; |
|
|
98 | |
|
|
99 | our $CONNECT_INTERVAL = 5; # new connect every 5s, at least |
|
|
100 | our $CONNECT_TIMEOUT = 30; # includes handshake |
40 | |
101 | |
41 | sub default_secret { |
102 | sub default_secret { |
42 | unless (defined $DEFAULT_SECRET) { |
103 | unless (defined $DEFAULT_SECRET) { |
43 | if (open my $fh, "<$ENV{HOME}/.aemp-secret") { |
104 | if (open my $fh, "<$ENV{HOME}/.aemp-secret") { |
44 | sysread $fh, $DEFAULT_SECRET, -s $fh; |
105 | sysread $fh, $DEFAULT_SECRET, -s $fh; |
45 | } else { |
106 | } else { |
46 | $DEFAULT_SECRET = nonce 32; |
107 | $DEFAULT_SECRET = AnyEvent::MP::Util::nonce 32; |
47 | } |
108 | } |
48 | } |
109 | } |
49 | |
110 | |
50 | $DEFAULT_SECRET |
111 | $DEFAULT_SECRET |
51 | } |
112 | } |
|
|
113 | |
|
|
114 | our $UNIQ = sprintf "%x.%x", $$, time; # per-process/node unique cookie |
|
|
115 | our $PUBLIC = 0; |
|
|
116 | our $NODE; |
|
|
117 | our $PORT; |
|
|
118 | |
|
|
119 | our %NODE; # node id to transport mapping, or "undef", for local node |
|
|
120 | our %PORT; # local ports |
|
|
121 | our %LISTENER; # local transports |
|
|
122 | |
|
|
123 | sub NODE() { $NODE } |
|
|
124 | |
|
|
125 | { |
|
|
126 | use POSIX (); |
|
|
127 | my $nodename = (POSIX::uname)[1]; |
|
|
128 | $NODE = "$$\@$nodename"; |
|
|
129 | } |
|
|
130 | |
|
|
131 | sub _ANY_() { 1 } |
|
|
132 | sub _any_() { \&_ANY_ } |
|
|
133 | |
|
|
134 | sub add_node { |
|
|
135 | my ($noderef) = @_; |
|
|
136 | |
|
|
137 | return $NODE{$noderef} |
|
|
138 | if exists $NODE{$noderef}; |
|
|
139 | |
|
|
140 | for (split /,/, $noderef) { |
|
|
141 | return $NODE{$noderef} = $NODE{$_} |
|
|
142 | if exists $NODE{$_}; |
|
|
143 | } |
|
|
144 | |
|
|
145 | # for indirect sends, use a different class |
|
|
146 | my $node = new AnyEvent::MP::Node::Direct $noderef; |
|
|
147 | |
|
|
148 | $NODE{$_} = $node |
|
|
149 | for $noderef, split /,/, $noderef; |
|
|
150 | |
|
|
151 | $node |
|
|
152 | } |
|
|
153 | |
|
|
154 | sub snd($@) { |
|
|
155 | my ($noderef, $port) = split /#/, shift, 2; |
|
|
156 | |
|
|
157 | add_node $noderef |
|
|
158 | unless exists $NODE{$noderef}; |
|
|
159 | |
|
|
160 | $NODE{$noderef}->send ([$port, [@_]]); |
|
|
161 | } |
|
|
162 | |
|
|
163 | sub _inject { |
|
|
164 | my ($port, $msg) = @{+shift}; |
|
|
165 | |
|
|
166 | $port = $PORT{$port} |
|
|
167 | or return; |
|
|
168 | |
|
|
169 | use Data::Dumper; |
|
|
170 | warn Dumper $msg; |
|
|
171 | } |
|
|
172 | |
|
|
173 | sub normalise_noderef($) { |
|
|
174 | my ($noderef) = @_; |
|
|
175 | |
|
|
176 | my $cv = AE::cv; |
|
|
177 | my @res; |
|
|
178 | |
|
|
179 | $cv->begin (sub { |
|
|
180 | my %seen; |
|
|
181 | my @refs; |
|
|
182 | for (sort { $a->[0] <=> $b->[0] } @res) { |
|
|
183 | push @refs, $_->[1] unless $seen{$_->[1]}++ |
|
|
184 | } |
|
|
185 | shift->send (join ",", @refs); |
|
|
186 | }); |
|
|
187 | |
|
|
188 | $noderef = $DEFAULT_PORT unless length $noderef; |
|
|
189 | |
|
|
190 | my $idx; |
|
|
191 | for my $t (split /,/, $noderef) { |
|
|
192 | my $pri = ++$idx; |
|
|
193 | |
|
|
194 | #TODO: this should be outside normalise_noderef and in become_public |
|
|
195 | if ($t =~ /^\d*$/) { |
|
|
196 | my $nodename = (POSIX::uname)[1]; |
|
|
197 | |
|
|
198 | $cv->begin; |
|
|
199 | AnyEvent::Socket::resolve_sockaddr $nodename, $t || "aemp=$DEFAULT_PORT", "tcp", 0, undef, sub { |
|
|
200 | for (@_) { |
|
|
201 | my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3]; |
|
|
202 | push @res, [ |
|
|
203 | $pri += 1e-5, |
|
|
204 | AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service |
|
|
205 | ]; |
|
|
206 | } |
|
|
207 | $cv->end; |
|
|
208 | }; |
|
|
209 | |
|
|
210 | # my (undef, undef, undef, undef, @ipv4) = gethostbyname $nodename; |
|
|
211 | # |
|
|
212 | # for (@ipv4) { |
|
|
213 | # push @res, [ |
|
|
214 | # $pri, |
|
|
215 | # AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $_, $t || $DEFAULT_PORT, |
|
|
216 | # ]; |
|
|
217 | # } |
|
|
218 | } else { |
|
|
219 | my ($host, $port) = AnyEvent::Socket::parse_hostport $t, "aemp=$DEFAULT_PORT" |
|
|
220 | or Carp::croak "$t: unparsable transport descriptor"; |
|
|
221 | |
|
|
222 | $cv->begin; |
|
|
223 | AnyEvent::Socket::resolve_sockaddr $host, $port, "tcp", 0, undef, sub { |
|
|
224 | for (@_) { |
|
|
225 | my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3]; |
|
|
226 | push @res, [ |
|
|
227 | $pri += 1e-5, |
|
|
228 | AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service |
|
|
229 | ]; |
|
|
230 | } |
|
|
231 | $cv->end; |
|
|
232 | } |
|
|
233 | } |
|
|
234 | } |
|
|
235 | |
|
|
236 | $cv->end; |
|
|
237 | |
|
|
238 | $cv |
|
|
239 | } |
|
|
240 | |
|
|
241 | sub become_public { |
|
|
242 | return if $PUBLIC; |
|
|
243 | |
|
|
244 | my $noderef = join ",", ref $_[0] ? @{+shift} : shift; |
|
|
245 | my @args = @_; |
|
|
246 | |
|
|
247 | $NODE = (normalise_noderef $noderef)->recv; |
|
|
248 | |
|
|
249 | my $self = new AnyEvent::MP::Node::Self noderef => $NODE; |
|
|
250 | |
|
|
251 | $NODE{""} = $self; # empty string == local node |
|
|
252 | |
|
|
253 | for my $t (split /,/, $NODE) { |
|
|
254 | $NODE{$t} = $self; |
|
|
255 | |
|
|
256 | my ($host, $port) = AnyEvent::Socket::parse_hostport $t; |
|
|
257 | |
|
|
258 | $LISTENER{$t} = AnyEvent::MP::Transport::mp_server $host, $port, |
|
|
259 | @args, |
|
|
260 | on_error => sub { |
|
|
261 | die "on_error<@_>\n";#d# |
|
|
262 | }, |
|
|
263 | on_connect => sub { |
|
|
264 | my ($tp) = @_; |
|
|
265 | |
|
|
266 | $NODE{$tp->{remote_id}} = $_[0]; |
|
|
267 | }, |
|
|
268 | sub { |
|
|
269 | my ($tp) = @_; |
|
|
270 | |
|
|
271 | $NODE{"$tp->{peerhost}:$tp->{peerport}"} = $tp; |
|
|
272 | }, |
|
|
273 | ; |
|
|
274 | } |
|
|
275 | |
|
|
276 | $PUBLIC = 1; |
|
|
277 | } |
|
|
278 | |
|
|
279 | =back |
52 | |
280 | |
53 | =head1 SEE ALSO |
281 | =head1 SEE ALSO |
54 | |
282 | |
55 | L<AnyEvent>. |
283 | L<AnyEvent>. |
56 | |
284 | |