AnyEvent-MP/MP/Base.pm

=head1 NAME

AnyEvent::MP::Base - basis for AnyEvent::MP and Coro::MP

=head1 SYNOPSIS

   # use AnyEvent::MP or Coro::MP instead

=head1 DESCRIPTION

This module provides most of the basic functionality of AnyEvent::MP,
exposed through higher level interfaces such as L<AnyEvent::MP> and
L<Coro::MP>.

=head1 GLOBALS

=over 4

=cut

package AnyEvent::MP::Base;

use common::sense;
use Carp ();
use MIME::Base64 ();

use AE ();

use AnyEvent::MP::Node;
use AnyEvent::MP::Transport;

use base "Exporter";

our $VERSION = '0.01';
our @EXPORT = qw(
   NODE $NODE snd del _any_
   become_slave become_public
);

our $DEFAULT_SECRET;

our $CONNECT_INTERVAL =  5; # new connect every 5s, at least
our $CONNECT_TIMEOUT  = 30; # includes handshake

=item $AnyEvent::MP::Base::WARN

This value is called with an error or warning message, when e.g. a connection
could not be created, authorisation failed and so on.

The default simply logs the message to STDERR.

=cut

our $WARN = sub {
   warn "$_[0]\n";
};

sub nonce($) {
   my $nonce;

   if (open my $fh, "</dev/urandom") {
      sysread $fh, $nonce, $_[0];
   } else {
      # shit...
      our $nonce_init;
      unless ($nonce_init++) {
         srand time ^ $$ ^ unpack "%L*", qx"ps -edalf" . qx"ipconfig /all";
      }

      $nonce = join "", map +(chr rand 256), 1 .. $_[0]
   }

   $nonce
}

sub default_secret {
   unless (defined $DEFAULT_SECRET) {
      if (open my $fh, "<$ENV{HOME}/.aemp-secret") {
         sysread $fh, $DEFAULT_SECRET, -s $fh;
      } else {
         $DEFAULT_SECRET = nonce 32;
      }
   }

   $DEFAULT_SECRET
}

sub gen_uniq {
   my $uniq = pack "wN", $$, time;
   $uniq = MIME::Base64::encode_base64 $uniq, "";
   $uniq =~ s/=+$//;
   $uniq
}

our $UNIQ = gen_uniq; # per-process/node unique cookie
our $ID   = "a";
our $PUBLIC = 0;
our $NODE = $$;
our $PORT;

our %NODE; # node id to transport mapping, or "undef", for local node
our %PORT; # local ports

our %RMON; # local ports monitored by remote nodes ($RMON{noderef}{portid} == cb)
our %LMON; # monitored _local_ ports

our %WKP;
our %LISTENER; # local transports

our $SRCNODE; # holds the sending node during _inject

sub NODE() { $NODE }

sub _ANY_() { 1 }
sub _any_() { \&_ANY_ }

sub _inject {
   &{ $PORT{+shift} or return };
}

sub add_node {
   my ($noderef) = @_;

   return $NODE{$noderef}
      if exists $NODE{$noderef};

   for (split /,/, $noderef) {
      return $NODE{$noderef} = $NODE{$_}
         if exists $NODE{$_};
   }

   # for indirect sends, use a different class
   my $node = new AnyEvent::MP::Node::Direct $noderef;

   $NODE{$_} = $node
      for $noderef, split /,/, $noderef;

   $node
}

sub snd(@) {
   my ($noderef, $port) = split /#/, shift, 2;

   ($NODE{$noderef} || add_node $noderef)
      ->send ([$port, @_]);
}

sub del($) {
   my ($noderef, $port) = split /#/, shift, 2;

   delete $PORT{$port};

   my $mon = delete $LMON{$port}
      or return;

   $_->() for values %$mon;
}

sub become_public {
   return if $PUBLIC;

   my $noderef = join ",", @_;
   my @args = @_;

   $NODE = (AnyEvent::MP::Node::normalise_noderef $noderef)->recv;

   for my $t (split /,/, $NODE) {
      $NODE{$t} = $NODE{""};

      my ($host, $port) = AnyEvent::Socket::parse_hostport $t;

      $LISTENER{$t} = AnyEvent::MP::Transport::mp_server $host, $port,
         @args,
         sub {
            my ($tp) = @_;

            # TODO: urgs
            my $node = add_node $tp->{remote_node};
            $node->{trial}{accept} = $tp;
         },
      ;
   }

   $PUBLIC = 1;
}

#############################################################################
# self node code

our %node_req = (
   # monitoring
   mon0 => sub { # disable monitoring
      my $portid = shift;
      my $node   = $SRCNODE;
      $NODE{""}->unmonitor ($portid, delete $node->{rmon}{$portid});
   },
   mon1 => sub { # enable monitoring
      my $portid = shift;
      my $node   = $SRCNODE;
      $NODE{""}->monitor ($portid, $node->{rmon}{$portid} = sub {
         $node->send (["", exit => $portid]);
      });
   },
   exit => sub {
      my $cbs = delete $SRCNODE->{lmon}{$_[0]}
         or return;

      $_->() for @$cbs;
   },

   # well-known-port lookup
   wkp => sub {
      my $wkname = shift;
      snd @_, $WKP{$wkname};
   },

   # relay message to another node / generic echo
   relay => sub {
      &snd;
   },

   # random garbage
   eval => sub {
      my @res = eval shift;
      snd @_, "$@", @res if @_;
   },
   time => sub {
      snd @_, AE::time;
   },
   devnull => sub {
      #
   },
);

$NODE{""} = new AnyEvent::MP::Node::Self noderef => $NODE;
$PORT{""} = sub { &{ $node_req{+shift} or return } };

=back

=head1 SEE ALSO

L<AnyEvent::MP>.

=head1 AUTHOR

 Marc Lehmann <schmorp@schmorp.de>
 http://home.schmorp.de/

=cut

1

Revision:	1.6
Committed:	Mon Aug 3 22:05:55 2009 UTC (14 years, 10 months ago) by root
Branch:	MAIN
Changes since 1.5:	+12 -5 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	=head1 NAME
2
3			AnyEvent::MP::Base - basis for AnyEvent::MP and Coro::MP
4
5			=head1 SYNOPSIS
6
7			# use AnyEvent::MP or Coro::MP instead
8
9	root	1.3	=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	1.4	=head1 GLOBALS
16
17			=over 4
18
19	root	1.1	=cut
20
21			package AnyEvent::MP::Base;
22
23			use common::sense;
24			use Carp ();
25	root	1.6	use MIME::Base64 ();
26	root	1.1
27			use AE ();
28
29	root	1.6	use AnyEvent::MP::Node;
30			use AnyEvent::MP::Transport;
31
32	root	1.1	use base "Exporter";
33
34			our $VERSION = '0.01';
35	root	1.5	our @EXPORT = qw(
36			NODE $NODE snd del _any_
37			become_slave become_public
38			);
39	root	1.1
40			our $DEFAULT_SECRET;
41
42			our $CONNECT_INTERVAL = 5; # new connect every 5s, at least
43			our $CONNECT_TIMEOUT = 30; # includes handshake
44
45	root	1.4	=item $AnyEvent::MP::Base::WARN
46
47			This value is called with an error or warning message, when e.g. a connection
48			could not be created, authorisation failed and so on.
49
50			The default simply logs the message to STDERR.
51
52			=cut
53
54	root	1.3	our $WARN = sub {
55			warn "$_[0]\n";
56			};
57
58	root	1.1	sub nonce($) {
59			my $nonce;
60
61			if (open my $fh, "</dev/urandom") {
62			sysread $fh, $nonce, $_[0];
63			} else {
64			# shit...
65			our $nonce_init;
66			unless ($nonce_init++) {
67			srand time ^ $$ ^ unpack "%L*", qx"ps -edalf" . qx"ipconfig /all";
68			}
69
70			$nonce = join "", map +(chr rand 256), 1 .. $_[0]
71			}
72
73			$nonce
74			}
75
76			sub default_secret {
77			unless (defined $DEFAULT_SECRET) {
78			if (open my $fh, "<$ENV{HOME}/.aemp-secret") {
79			sysread $fh, $DEFAULT_SECRET, -s $fh;
80			} else {
81	root	1.2	$DEFAULT_SECRET = nonce 32;
82	root	1.1	}
83			}
84
85			$DEFAULT_SECRET
86			}
87
88	root	1.6	sub gen_uniq {
89			my $uniq = pack "wN", $$, time;
90			$uniq = MIME::Base64::encode_base64 $uniq, "";
91			$uniq =~ s/=+$//;
92			$uniq
93			}
94
95			our $UNIQ = gen_uniq; # per-process/node unique cookie
96	root	1.1	our $ID = "a";
97			our $PUBLIC = 0;
98			our $NODE = $$;
99			our $PORT;
100
101			our %NODE; # node id to transport mapping, or "undef", for local node
102			our %PORT; # local ports
103	root	1.5
104			our %RMON; # local ports monitored by remote nodes ($RMON{noderef}{portid} == cb)
105			our %LMON; # monitored _local_ ports
106
107	root	1.1	our %WKP;
108			our %LISTENER; # local transports
109
110	root	1.5	our $SRCNODE; # holds the sending node during _inject
111
112	root	1.1	sub NODE() { $NODE }
113
114			sub _ANY_() { 1 }
115			sub _any_() { \&_ANY_ }
116
117			sub _inject {
118	root	1.5	&{ $PORT{+shift} or return };
119	root	1.1	}
120
121			sub add_node {
122			my ($noderef) = @_;
123
124			return $NODE{$noderef}
125			if exists $NODE{$noderef};
126
127			for (split /,/, $noderef) {
128			return $NODE{$noderef} = $NODE{$_}
129			if exists $NODE{$_};
130			}
131
132			# for indirect sends, use a different class
133			my $node = new AnyEvent::MP::Node::Direct $noderef;
134
135			$NODE{$_} = $node
136			for $noderef, split /,/, $noderef;
137
138			$node
139			}
140
141			sub snd(@) {
142			my ($noderef, $port) = split /#/, shift, 2;
143
144	root	1.5	($NODE{$noderef} \|\| add_node $noderef)
145			->send ([$port, @_]);
146			}
147
148			sub del($) {
149			my ($noderef, $port) = split /#/, shift, 2;
150
151			delete $PORT{$port};
152
153			my $mon = delete $LMON{$port}
154			or return;
155	root	1.1
156	root	1.5	$_->() for values %$mon;
157	root	1.1	}
158
159			sub become_public {
160			return if $PUBLIC;
161
162			my $noderef = join ",", @_;
163			my @args = @_;
164
165			$NODE = (AnyEvent::MP::Node::normalise_noderef $noderef)->recv;
166
167			for my $t (split /,/, $NODE) {
168			$NODE{$t} = $NODE{""};
169
170			my ($host, $port) = AnyEvent::Socket::parse_hostport $t;
171
172			$LISTENER{$t} = AnyEvent::MP::Transport::mp_server $host, $port,
173			@args,
174			sub {
175			my ($tp) = @_;
176
177	root	1.5	# TODO: urgs
178			my $node = add_node $tp->{remote_node};
179			$node->{trial}{accept} = $tp;
180	root	1.1	},
181			;
182			}
183
184			$PUBLIC = 1;
185			}
186
187			#############################################################################
188			# self node code
189
190	root	1.5	our %node_req = (
191			# monitoring
192			mon0 => sub { # disable monitoring
193			my $portid = shift;
194			my $node = $SRCNODE;
195			$NODE{""}->unmonitor ($portid, delete $node->{rmon}{$portid});
196			},
197			mon1 => sub { # enable monitoring
198			my $portid = shift;
199			my $node = $SRCNODE;
200			$NODE{""}->monitor ($portid, $node->{rmon}{$portid} = sub {
201			$node->send (["", exit => $portid]);
202			});
203			},
204			exit => sub {
205			my $cbs = delete $SRCNODE->{lmon}{$_[0]}
206			or return;
207
208			$_->() for @$cbs;
209			},
210
211			# well-known-port lookup
212			wkp => sub {
213			my $wkname = shift;
214			snd @_, $WKP{$wkname};
215			},
216
217			# relay message to another node / generic echo
218			relay => sub {
219			&snd;
220			},
221
222			# random garbage
223			eval => sub {
224			my @res = eval shift;
225			snd @_, "$@", @res if @_;
226			},
227			time => sub {
228			snd @_, AE::time;
229			},
230			devnull => sub {
231			#
232			},
233			);
234
235	root	1.1	$NODE{""} = new AnyEvent::MP::Node::Self noderef => $NODE;
236	root	1.5	$PORT{""} = sub { &{ $node_req{+shift} or return } };
237	root	1.1
238	root	1.4	=back
239
240	root	1.1	=head1 SEE ALSO
241
242			L<AnyEvent::MP>.
243
244			=head1 AUTHOR
245
246			Marc Lehmann <schmorp@schmorp.de>
247			http://home.schmorp.de/
248
249			=cut
250
251			1
252