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 %PORT %PORT_DATA %REG $UNIQ $ID add_node

   NODE $NODE node_of snd kil _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 {
   my $msg = $_[0];
   $msg =~ s/\n$//;
   warn "$msg\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 = unpack "H*", nonce 16;

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

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

our %REG;  # registered port names

our %LISTENER;

our $SRCNODE; # holds the sending node during _inject

sub NODE() {
   $NODE
}

sub node_of($) {
   my ($noderef, undef) = split /#/, $_[0], 2;

   $noderef
}

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

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

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 (["", kil => $portid, @_]);
      });
   },
   kil => sub {
      my $cbs = delete $SRCNODE->{lmon}{+shift}
         or return;

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

   # well-known-port lookup
   lookup => sub {
      my $name = shift;
      my $port = $REG{$name};
      #TODO: check vailidity
      snd @_, $port;
   },

   # 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{""} = $NODE{$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:	1.9
Committed:	Tue Aug 4 21:06:47 2009 UTC (17 years, 1 month ago) by root
Branch:	MAIN
CVS Tags:	rel-0_1
Changes since 1.8:	+2 -2 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	root	1.8	%NODE %PORT %PORT_DATA %REG $UNIQ $ID add_node
37
38			NODE $NODE node_of snd kil _any_
39	root	1.5	become_slave become_public
40			);
41	root	1.1
42			our $DEFAULT_SECRET;
43
44			our $CONNECT_INTERVAL = 5; # new connect every 5s, at least
45			our $CONNECT_TIMEOUT = 30; # includes handshake
46
47	root	1.4	=item $AnyEvent::MP::Base::WARN
48
49			This value is called with an error or warning message, when e.g. a connection
50			could not be created, authorisation failed and so on.
51
52			The default simply logs the message to STDERR.
53
54			=cut
55
56	root	1.3	our $WARN = sub {
57	root	1.8	my $msg = $_[0];
58			$msg =~ s/\n$//;
59			warn "$msg\n";
60	root	1.3	};
61
62	root	1.1	sub nonce($) {
63			my $nonce;
64
65			if (open my $fh, "</dev/urandom") {
66			sysread $fh, $nonce, $_[0];
67			} else {
68			# shit...
69			our $nonce_init;
70			unless ($nonce_init++) {
71			srand time ^ $$ ^ unpack "%L*", qx"ps -edalf" . qx"ipconfig /all";
72			}
73
74			$nonce = join "", map +(chr rand 256), 1 .. $_[0]
75			}
76
77			$nonce
78			}
79
80			sub default_secret {
81			unless (defined $DEFAULT_SECRET) {
82			if (open my $fh, "<$ENV{HOME}/.aemp-secret") {
83			sysread $fh, $DEFAULT_SECRET, -s $fh;
84			} else {
85	root	1.2	$DEFAULT_SECRET = nonce 32;
86	root	1.1	}
87			}
88
89			$DEFAULT_SECRET
90			}
91
92	root	1.6	sub gen_uniq {
93			my $uniq = pack "wN", $$, time;
94			$uniq = MIME::Base64::encode_base64 $uniq, "";
95			$uniq =~ s/=+$//;
96			$uniq
97			}
98
99			our $UNIQ = gen_uniq; # per-process/node unique cookie
100	root	1.1	our $ID = "a";
101			our $PUBLIC = 0;
102	root	1.9	our $NODE = unpack "H*", nonce 16;
103	root	1.1
104			our %NODE; # node id to transport mapping, or "undef", for local node
105	root	1.8	our (%PORT, %PORT_DATA); # local ports
106	root	1.5
107			our %RMON; # local ports monitored by remote nodes ($RMON{noderef}{portid} == cb)
108			our %LMON; # monitored _local_ ports
109
110	root	1.8	our %REG; # registered port names
111
112			our %LISTENER;
113	root	1.1
114	root	1.5	our $SRCNODE; # holds the sending node during _inject
115
116	root	1.8	sub NODE() {
117			$NODE
118			}
119
120			sub node_of($) {
121			my ($noderef, undef) = split /#/, $_[0], 2;
122
123			$noderef
124			}
125	root	1.1
126			sub _ANY_() { 1 }
127			sub _any_() { \&_ANY_ }
128
129			sub _inject {
130	root	1.5	&{ $PORT{+shift} or return };
131	root	1.1	}
132
133			sub add_node {
134			my ($noderef) = @_;
135
136			return $NODE{$noderef}
137			if exists $NODE{$noderef};
138
139			for (split /,/, $noderef) {
140			return $NODE{$noderef} = $NODE{$_}
141			if exists $NODE{$_};
142			}
143
144			# for indirect sends, use a different class
145			my $node = new AnyEvent::MP::Node::Direct $noderef;
146
147			$NODE{$_} = $node
148			for $noderef, split /,/, $noderef;
149
150			$node
151			}
152
153			sub snd(@) {
154			my ($noderef, $port) = split /#/, shift, 2;
155
156	root	1.5	($NODE{$noderef} \|\| add_node $noderef)
157			->send ([$port, @_]);
158			}
159
160	root	1.8	sub kil(@) {
161	root	1.5	my ($noderef, $port) = split /#/, shift, 2;
162
163	root	1.7	($NODE{$noderef} \|\| add_node $noderef)
164			->kill ($port, @_);
165	root	1.1	}
166
167			sub become_public {
168			return if $PUBLIC;
169
170			my $noderef = join ",", @_;
171			my @args = @_;
172
173			$NODE = (AnyEvent::MP::Node::normalise_noderef $noderef)->recv;
174
175			for my $t (split /,/, $NODE) {
176			$NODE{$t} = $NODE{""};
177
178			my ($host, $port) = AnyEvent::Socket::parse_hostport $t;
179
180			$LISTENER{$t} = AnyEvent::MP::Transport::mp_server $host, $port,
181			@args,
182			sub {
183			my ($tp) = @_;
184
185	root	1.5	# TODO: urgs
186			my $node = add_node $tp->{remote_node};
187			$node->{trial}{accept} = $tp;
188	root	1.1	},
189			;
190			}
191
192			$PUBLIC = 1;
193			}
194
195			#############################################################################
196			# self node code
197
198	root	1.5	our %node_req = (
199			# monitoring
200			mon0 => sub { # disable monitoring
201			my $portid = shift;
202			my $node = $SRCNODE;
203			$NODE{""}->unmonitor ($portid, delete $node->{rmon}{$portid});
204			},
205			mon1 => sub { # enable monitoring
206			my $portid = shift;
207			my $node = $SRCNODE;
208			$NODE{""}->monitor ($portid, $node->{rmon}{$portid} = sub {
209	root	1.8	$node->send (["", kil => $portid, @_]);
210	root	1.5	});
211			},
212	root	1.7	kil => sub {
213	root	1.8	my $cbs = delete $SRCNODE->{lmon}{+shift}
214	root	1.5	or return;
215
216	root	1.8	$_->(@_) for @$cbs;
217	root	1.5	},
218
219			# well-known-port lookup
220	root	1.8	lookup => sub {
221			my $name = shift;
222			my $port = $REG{$name};
223			#TODO: check vailidity
224			snd @_, $port;
225	root	1.5	},
226
227			# relay message to another node / generic echo
228			relay => sub {
229			&snd;
230			},
231
232			# random garbage
233			eval => sub {
234			my @res = eval shift;
235			snd @_, "$@", @res if @_;
236			},
237			time => sub {
238			snd @_, AE::time;
239			},
240			devnull => sub {
241			#
242			},
243			);
244
245	root	1.9	$NODE{""} = $NODE{$NODE} = new AnyEvent::MP::Node::Self noderef => $NODE;
246	root	1.5	$PORT{""} = sub { &{ $node_req{+shift} or return } };
247	root	1.1
248	root	1.4	=back
249
250	root	1.1	=head1 SEE ALSO
251
252			L<AnyEvent::MP>.
253
254			=head1 AUTHOR
255
256			Marc Lehmann <schmorp@schmorp.de>
257			http://home.schmorp.de/
258
259			=cut
260
261			1
262