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1.1 |
=head1 NAME |
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1.3 |
AnyEvent::MP::Kernel - the actual message passing kernel |
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=head1 SYNOPSIS |
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1.3 |
use AnyEvent::MP::Kernel; |
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1.1 |
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=head1 DESCRIPTION |
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This module provides most of the basic functionality of AnyEvent::MP, |
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exposed through higher level interfaces such as L<AnyEvent::MP> and |
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L<Coro::MP>. |
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1.3 |
This module is mainly of interest when knowledge about connectivity, |
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1.27 |
connected nodes etc. is sought. |
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1.3 |
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=head1 GLOBALS AND FUNCTIONS |
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1.1 |
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=over 4 |
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=cut |
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package AnyEvent::MP::Kernel; |
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use common::sense; |
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1.16 |
use POSIX (); |
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1.1 |
use Carp (); |
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use MIME::Base64 (); |
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use AE (); |
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use AnyEvent::MP::Node; |
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use AnyEvent::MP::Transport; |
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use base "Exporter"; |
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1.71 |
our @EXPORT_OK = qw( |
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%NODE %PORT %PORT_DATA $UNIQ $RUNIQ $ID |
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); |
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1.1 |
our @EXPORT = qw( |
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1.21 |
add_node load_func snd_to_func snd_on eval_on |
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1.1 |
|
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1.34 |
NODE $NODE node_of snd kil port_is_local |
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configure |
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1.46 |
up_nodes mon_nodes node_is_up |
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1.1 |
); |
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1.16 |
=item $AnyEvent::MP::Kernel::WARN->($level, $msg) |
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1.1 |
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1.27 |
This value is called with an error or warning message, when e.g. a |
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connection could not be created, authorisation failed and so on. |
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It I<must not> block or send messages -queue it and use an idle watcher if |
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you need to do any of these things. |
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1.1 |
|
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1.38 |
C<$level> should be C<0> for messages to be logged always, C<1> for |
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1.16 |
unexpected messages and errors, C<2> for warnings, C<7> for messages about |
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node connectivity and services, C<8> for debugging messages and C<9> for |
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tracing messages. |
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1.1 |
The default simply logs the message to STDERR. |
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1.44 |
=item @AnyEvent::MP::Kernel::WARN |
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All code references in this array are called for every log message, from |
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the default C<$WARN> handler. This is an easy way to tie into the log |
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messages without disturbing others. |
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1.1 |
=cut |
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1.29 |
our $WARNLEVEL = exists $ENV{PERL_ANYEVENT_MP_WARNLEVEL} ? $ENV{PERL_ANYEVENT_MP_WARNLEVEL} : 5; |
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our @WARN; |
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our $WARN = sub { |
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&$_ for @WARN; |
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return if $WARNLEVEL < $_[0]; |
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1.16 |
my ($level, $msg) = @_; |
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$msg =~ s/\n$//; |
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printf STDERR "%s <%d> %s\n", |
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(POSIX::strftime "%Y-%m-%d %H:%M:%S", localtime time), |
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$level, |
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$msg; |
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}; |
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=item $AnyEvent::MP::Kernel::WARNLEVEL [default 5 or $ENV{PERL_ANYEVENT_MP_WARNLEVEL}] |
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The maximum level at which warning messages will be printed to STDERR by |
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the default warn handler. |
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=cut |
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sub load_func($) { |
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my $func = $_[0]; |
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unless (defined &$func) { |
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my $pkg = $func; |
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do { |
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$pkg =~ s/::[^:]+$// |
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or return sub { die "unable to resolve function '$func'" }; |
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local $@; |
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unless (eval "require $pkg; 1") { |
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my $error = $@; |
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$error =~ /^Can't locate .*.pm in \@INC \(/ |
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or return sub { die $error }; |
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} |
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} until defined &$func; |
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} |
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\&$func |
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} |
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sub nonce($) { |
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my $nonce; |
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if (open my $fh, "</dev/urandom") { |
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sysread $fh, $nonce, $_[0]; |
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} else { |
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# shit... |
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$nonce = join "", map +(chr rand 256), 1 .. $_[0] |
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} |
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$nonce |
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} |
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sub alnumbits($) { |
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my $data = $_[0]; |
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if (eval "use Math::GMP 2.05; 1") { |
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$data = Math::GMP::get_str_gmp ( |
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(Math::GMP::new_from_scalar_with_base (+(unpack "H*", $data), 16)), |
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); |
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} else { |
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$data = MIME::Base64::encode_base64 $data, ""; |
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$data =~ s/=//; |
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$data =~ s/x/x0/g; |
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$data =~ s/\//x1/g; |
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$data =~ s/\+/x2/g; |
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1.1 |
} |
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$data |
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} |
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sub gen_uniq { |
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alnumbits pack "nna*", $$ & 0xffff, time & 0xffff, nonce 2 |
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1.1 |
} |
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1.20 |
our $CONFIG; # this node's configuration |
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1.21 |
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1.64 |
our $RUNIQ; # remote uniq value |
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our $UNIQ; # per-process/node unique cookie |
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our $NODE; |
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our $ID = "a"; |
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our %NODE; # node id to transport mapping, or "undef", for local node |
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our (%PORT, %PORT_DATA); # local ports |
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our %RMON; # local ports monitored by remote nodes ($RMON{nodeid}{portid} == cb) |
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our %LMON; # monitored _local_ ports |
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1.71 |
our $GLOBAL; # true if node is a global ("directory") node |
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our %LISTENER; |
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1.21 |
our $LISTENER; # our listeners, as arrayref |
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our $SRCNODE; # holds the sending node during _inject |
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1.69 |
sub _init_names { |
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1.64 |
$RUNIQ = alnumbits nonce 96/8; |
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$UNIQ = gen_uniq; |
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$NODE = "anon/$RUNIQ"; |
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} |
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1.69 |
_init_names; |
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1.64 |
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1.1 |
sub NODE() { |
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$NODE |
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} |
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sub node_of($) { |
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my ($node, undef) = split /#/, $_[0], 2; |
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|
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1.21 |
$node |
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1.1 |
} |
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1.17 |
BEGIN { |
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*TRACE = $ENV{PERL_ANYEVENT_MP_TRACE} |
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? sub () { 1 } |
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: sub () { 0 }; |
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} |
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1.1 |
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1.42 |
our $DELAY_TIMER; |
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our @DELAY_QUEUE; |
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sub _delay_run { |
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1.55 |
(shift @DELAY_QUEUE or return undef $DELAY_TIMER)->() while 1; |
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1.42 |
} |
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sub delay($) { |
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push @DELAY_QUEUE, shift; |
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$DELAY_TIMER ||= AE::timer 0, 0, \&_delay_run; |
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} |
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1.1 |
sub _inject { |
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1.48 |
warn "RCV $SRCNODE->{id} -> " . eval { JSON::XS->new->encode (\@_) } . "\n" if TRACE && @_;#d# |
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1.1 |
&{ $PORT{+shift} or return }; |
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} |
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1.20 |
# this function adds a node-ref, so you can send stuff to it |
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# it is basically the central routing component. |
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1.1 |
sub add_node { |
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1.21 |
my ($node) = @_; |
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1.1 |
|
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1.71 |
$NODE{$node} ||= new AnyEvent::MP::Node::Remote $node |
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1.13 |
} |
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1.1 |
sub snd(@) { |
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1.21 |
my ($nodeid, $portid) = split /#/, shift, 2; |
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1.1 |
|
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1.48 |
warn "SND $nodeid <- " . eval { JSON::XS->new->encode (\@_) } . "\n" if TRACE && @_;#d# |
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|
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1.49 |
defined $nodeid #d#UGLY |
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or Carp::croak "'undef' is not a valid node ID/port ID"; |
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1.21 |
($NODE{$nodeid} || add_node $nodeid) |
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1.2 |
->{send} (["$portid", @_]); |
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1.1 |
} |
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1.17 |
=item $is_local = port_is_local $port |
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Returns true iff the port is a local port. |
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=cut |
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sub port_is_local($) { |
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1.21 |
my ($nodeid, undef) = split /#/, $_[0], 2; |
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1.17 |
|
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1.21 |
$NODE{$nodeid} == $NODE{""} |
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1.17 |
} |
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1.18 |
=item snd_to_func $node, $func, @args |
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1.11 |
|
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1.21 |
Expects a node ID and a name of a function. Asynchronously tries to call |
249 |
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1.11 |
this function with the given arguments on that node. |
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1.20 |
This function can be used to implement C<spawn>-like interfaces. |
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1.11 |
|
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=cut |
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1.18 |
sub snd_to_func($$;@) { |
256 |
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1.21 |
my $nodeid = shift; |
257 |
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1.11 |
|
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1.41 |
# on $NODE, we artificially delay... (for spawn) |
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# this is very ugly - maybe we should simply delay ALL messages, |
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# to avoid deep recursion issues. but that's so... slow... |
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1.45 |
$AnyEvent::MP::Node::Self::DELAY = 1 |
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if $nodeid ne $NODE; |
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1.49 |
defined $nodeid #d#UGLY |
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or Carp::croak "'undef' is not a valid node ID/port ID"; |
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1.71 |
($NODE{$nodeid} || add_node $nodeid)->{send} (["", @_]); |
268 |
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1.11 |
} |
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1.18 |
=item snd_on $node, @msg |
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Executes C<snd> with the given C<@msg> (which must include the destination |
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port) on the given node. |
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=cut |
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sub snd_on($@) { |
278 |
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my $node = shift; |
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snd $node, snd => @_; |
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} |
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1.29 |
=item eval_on $node, $string[, @reply] |
283 |
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1.18 |
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1.29 |
Evaluates the given string as Perl expression on the given node. When |
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@reply is specified, then it is used to construct a reply message with |
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C<"$@"> and any results from the eval appended. |
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1.18 |
|
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=cut |
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290 |
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1.29 |
sub eval_on($$;@) { |
291 |
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1.18 |
my $node = shift; |
292 |
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snd $node, eval => @_; |
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} |
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1.1 |
sub kil(@) { |
296 |
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1.21 |
my ($nodeid, $portid) = split /#/, shift, 2; |
297 |
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1.1 |
|
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length $portid |
299 |
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1.21 |
or Carp::croak "$nodeid#$portid: killing a node port is not allowed, caught"; |
300 |
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1.1 |
|
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1.21 |
($NODE{$nodeid} || add_node $nodeid) |
302 |
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1.1 |
->kill ("$portid", @_); |
303 |
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} |
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############################################################################# |
306 |
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1.6 |
# node monitoring and info |
307 |
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1.3 |
|
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1.21 |
=item node_is_known $nodeid |
309 |
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1.13 |
|
310 |
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1.71 |
#TODO# |
311 |
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Returns true iff the given node is currently known to this node. |
312 |
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1.13 |
|
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=cut |
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315 |
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sub node_is_known($) { |
316 |
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exists $NODE{$_[0]} |
317 |
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} |
318 |
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319 |
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1.21 |
=item node_is_up $nodeid |
320 |
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1.13 |
|
321 |
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Returns true if the given node is "up", that is, the kernel thinks it has |
322 |
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a working connection to it. |
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1.69 |
If the node is known (to this local node) but not currently connected, |
325 |
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returns C<0>. If the node is not known, returns C<undef>. |
326 |
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1.13 |
|
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=cut |
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329 |
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sub node_is_up($) { |
330 |
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($NODE{$_[0]} or return)->{transport} |
331 |
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? 1 : 0 |
332 |
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} |
333 |
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334 |
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1.3 |
=item known_nodes |
335 |
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|
336 |
root |
1.71 |
#TODO# |
337 |
root |
1.26 |
Returns the node IDs of all nodes currently known to this node, including |
338 |
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itself and nodes not currently connected. |
339 |
root |
1.3 |
|
340 |
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=cut |
341 |
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342 |
root |
1.49 |
sub known_nodes() { |
343 |
root |
1.26 |
map $_->{id}, values %NODE |
344 |
root |
1.3 |
} |
345 |
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|
346 |
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=item up_nodes |
347 |
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|
348 |
root |
1.26 |
Return the node IDs of all nodes that are currently connected (excluding |
349 |
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the node itself). |
350 |
root |
1.3 |
|
351 |
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=cut |
352 |
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|
353 |
root |
1.49 |
sub up_nodes() { |
354 |
root |
1.26 |
map $_->{id}, grep $_->{transport}, values %NODE |
355 |
root |
1.3 |
} |
356 |
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|
357 |
root |
1.21 |
=item $guard = mon_nodes $callback->($nodeid, $is_up, @reason) |
358 |
root |
1.3 |
|
359 |
root |
1.27 |
Registers a callback that is called each time a node goes up (a connection |
360 |
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is established) or down (the connection is lost). |
361 |
root |
1.3 |
|
362 |
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Node up messages can only be followed by node down messages for the same |
363 |
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node, and vice versa. |
364 |
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|
365 |
root |
1.71 |
Note that monitoring a node is usually better done by monitoring its node |
366 |
root |
1.27 |
port. This function is mainly of interest to modules that are concerned |
367 |
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about the network topology and low-level connection handling. |
368 |
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|
369 |
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Callbacks I<must not> block and I<should not> send any messages. |
370 |
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|
371 |
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The function returns an optional guard which can be used to unregister |
372 |
root |
1.3 |
the monitoring callback again. |
373 |
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|
374 |
root |
1.46 |
Example: make sure you call function C<newnode> for all nodes that are up |
375 |
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or go up (and down). |
376 |
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|
377 |
|
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newnode $_, 1 for up_nodes; |
378 |
|
|
mon_nodes \&newnode; |
379 |
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|
380 |
root |
1.3 |
=cut |
381 |
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|
382 |
|
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our %MON_NODES; |
383 |
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|
384 |
|
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sub mon_nodes($) { |
385 |
|
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my ($cb) = @_; |
386 |
|
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|
387 |
|
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$MON_NODES{$cb+0} = $cb; |
388 |
|
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|
389 |
root |
1.62 |
defined wantarray && AnyEvent::Util::guard { delete $MON_NODES{$cb+0} } |
390 |
root |
1.3 |
} |
391 |
|
|
|
392 |
|
|
sub _inject_nodeevent($$;@) { |
393 |
root |
1.16 |
my ($node, $up, @reason) = @_; |
394 |
root |
1.3 |
|
395 |
|
|
for my $cb (values %MON_NODES) { |
396 |
root |
1.21 |
eval { $cb->($node->{id}, $up, @reason); 1 } |
397 |
root |
1.16 |
or $WARN->(1, $@); |
398 |
root |
1.3 |
} |
399 |
root |
1.16 |
|
400 |
root |
1.21 |
$WARN->(7, "$node->{id} is " . ($up ? "up" : "down") . " (@reason)"); |
401 |
root |
1.3 |
} |
402 |
|
|
|
403 |
|
|
############################################################################# |
404 |
root |
1.1 |
# self node code |
405 |
|
|
|
406 |
root |
1.67 |
sub _kill { |
407 |
|
|
my $port = shift; |
408 |
|
|
|
409 |
|
|
delete $PORT{$port} |
410 |
|
|
or return; # killing nonexistent ports is O.K. |
411 |
|
|
delete $PORT_DATA{$port}; |
412 |
|
|
|
413 |
|
|
my $mon = delete $LMON{$port} |
414 |
|
|
or !@_ |
415 |
|
|
or $WARN->(2, "unmonitored local port $port died with reason: @_"); |
416 |
|
|
|
417 |
|
|
$_->(@_) for values %$mon; |
418 |
|
|
} |
419 |
|
|
|
420 |
|
|
sub _monitor { |
421 |
|
|
return $_[2](no_such_port => "cannot monitor nonexistent port", "$NODE#$_[1]") |
422 |
|
|
unless exists $PORT{$_[1]}; |
423 |
|
|
|
424 |
|
|
$LMON{$_[1]}{$_[2]+0} = $_[2]; |
425 |
|
|
} |
426 |
|
|
|
427 |
|
|
sub _unmonitor { |
428 |
root |
1.68 |
delete $LMON{$_[1]}{$_[2]+0} |
429 |
|
|
if exists $LMON{$_[1]}; |
430 |
root |
1.67 |
} |
431 |
|
|
|
432 |
root |
1.1 |
our %node_req = ( |
433 |
|
|
# internal services |
434 |
|
|
|
435 |
|
|
# monitoring |
436 |
root |
1.65 |
mon0 => sub { # stop monitoring a port for another node |
437 |
root |
1.1 |
my $portid = shift; |
438 |
root |
1.67 |
_unmonitor undef, $portid, delete $SRCNODE->{rmon}{$portid}; |
439 |
root |
1.1 |
}, |
440 |
root |
1.65 |
mon1 => sub { # start monitoring a port for another node |
441 |
root |
1.1 |
my $portid = shift; |
442 |
root |
1.67 |
Scalar::Util::weaken (my $node = $SRCNODE); |
443 |
|
|
_monitor undef, $portid, $node->{rmon}{$portid} = sub { |
444 |
root |
1.58 |
delete $node->{rmon}{$portid}; |
445 |
root |
1.65 |
$node->send (["", kil0 => $portid, @_]) |
446 |
root |
1.59 |
if $node && $node->{transport}; |
447 |
root |
1.67 |
}; |
448 |
root |
1.1 |
}, |
449 |
root |
1.65 |
# another node has killed a monitored port |
450 |
|
|
kil0 => sub { |
451 |
root |
1.1 |
my $cbs = delete $SRCNODE->{lmon}{+shift} |
452 |
|
|
or return; |
453 |
|
|
|
454 |
|
|
$_->(@_) for @$cbs; |
455 |
|
|
}, |
456 |
|
|
|
457 |
root |
1.18 |
# "public" services - not actually public |
458 |
root |
1.1 |
|
459 |
root |
1.65 |
# another node wants to kill a local port |
460 |
root |
1.66 |
kil => \&_kill, |
461 |
root |
1.65 |
|
462 |
root |
1.1 |
# relay message to another node / generic echo |
463 |
root |
1.15 |
snd => \&snd, |
464 |
root |
1.27 |
snd_multiple => sub { |
465 |
root |
1.1 |
snd @$_ for @_ |
466 |
|
|
}, |
467 |
|
|
|
468 |
root |
1.4 |
# informational |
469 |
|
|
info => sub { |
470 |
|
|
snd @_, $NODE; |
471 |
|
|
}, |
472 |
|
|
known_nodes => sub { |
473 |
|
|
snd @_, known_nodes; |
474 |
|
|
}, |
475 |
|
|
up_nodes => sub { |
476 |
|
|
snd @_, up_nodes; |
477 |
|
|
}, |
478 |
|
|
|
479 |
root |
1.30 |
# random utilities |
480 |
root |
1.1 |
eval => sub { |
481 |
root |
1.50 |
my @res = do { package main; eval shift }; |
482 |
root |
1.1 |
snd @_, "$@", @res if @_; |
483 |
|
|
}, |
484 |
|
|
time => sub { |
485 |
|
|
snd @_, AE::time; |
486 |
|
|
}, |
487 |
|
|
devnull => sub { |
488 |
|
|
# |
489 |
|
|
}, |
490 |
root |
1.15 |
"" => sub { |
491 |
root |
1.27 |
# empty messages are keepalives or similar devnull-applications |
492 |
root |
1.15 |
}, |
493 |
root |
1.1 |
); |
494 |
|
|
|
495 |
root |
1.18 |
$NODE{""} = $NODE{$NODE} = new AnyEvent::MP::Node::Self $NODE; |
496 |
root |
1.1 |
$PORT{""} = sub { |
497 |
|
|
my $tag = shift; |
498 |
|
|
eval { &{ $node_req{$tag} ||= load_func $tag } }; |
499 |
root |
1.16 |
$WARN->(2, "error processing node message: $@") if $@; |
500 |
root |
1.1 |
}; |
501 |
|
|
|
502 |
root |
1.69 |
############################################################################# |
503 |
root |
1.71 |
# seed management, try to keep connections to all seeds at all times |
504 |
root |
1.69 |
|
505 |
root |
1.71 |
our %SEED_NODE; # seed ID => node ID|undef |
506 |
|
|
our %NODE_SEED; # map node ID to seed ID |
507 |
root |
1.69 |
our %SEED_CONNECT; # $seed => transport_connector | 1=connected | 2=connecting |
508 |
|
|
our $SEED_WATCHER; |
509 |
root |
1.71 |
our $SEED_RETRY; |
510 |
root |
1.69 |
|
511 |
|
|
sub seed_connect { |
512 |
|
|
my ($seed) = @_; |
513 |
|
|
|
514 |
|
|
my ($host, $port) = AnyEvent::Socket::parse_hostport $seed |
515 |
|
|
or Carp::croak "$seed: unparsable seed address"; |
516 |
|
|
|
517 |
|
|
$AnyEvent::MP::Kernel::WARN->(9, "trying connect to seed node $seed."); |
518 |
|
|
|
519 |
root |
1.71 |
$SEED_CONNECT{$seed} ||= AnyEvent::MP::Transport::mp_connect |
520 |
|
|
$host, $port, |
521 |
|
|
on_greeted => sub { |
522 |
|
|
# called after receiving remote greeting, learn remote node name |
523 |
|
|
|
524 |
|
|
# we rely on untrusted data here (the remote node name) this is |
525 |
|
|
# hopefully ok, as this can at most be used for DOSing, which is easy |
526 |
|
|
# when you can do MITM anyway. |
527 |
|
|
|
528 |
|
|
# if we connect to ourselves, nuke this seed, but make sure we act like a seed |
529 |
|
|
if ($_[0]{remote_node} eq $AnyEvent::MP::Kernel::NODE) { |
530 |
|
|
#d# require AnyEvent::MP::Global; # every seed becomes a global node currently |
531 |
|
|
_become_global ();#d# |
532 |
|
|
delete $SEED_NODE{$seed}; |
533 |
|
|
delete $NODE_SEED{$seed}; |
534 |
|
|
} else { |
535 |
|
|
$SEED_NODE{$seed} = $_[0]{remote_node}; |
536 |
|
|
$NODE_SEED{$_[0]{remote_node}} = $seed; |
537 |
|
|
} |
538 |
|
|
}, |
539 |
|
|
on_destroy => sub { |
540 |
|
|
delete $SEED_CONNECT{$seed}; |
541 |
|
|
}, |
542 |
root |
1.69 |
sub { |
543 |
|
|
$SEED_CONNECT{$seed} = 1; |
544 |
root |
1.71 |
} |
545 |
root |
1.69 |
; |
546 |
|
|
} |
547 |
|
|
|
548 |
|
|
sub seed_all { |
549 |
|
|
# my $next = List::Util::max 1, |
550 |
|
|
# $AnyEvent::MP::Kernel::CONFIG->{connect_interval} |
551 |
|
|
# * ($nodecnt ? keys %AnyEvent::MP::Kernel::NODE : 1) |
552 |
|
|
# - rand; |
553 |
|
|
|
554 |
|
|
my @seeds = grep { |
555 |
|
|
!exists $SEED_CONNECT{$_} |
556 |
|
|
&& !(defined $SEED_NODE{$_} && node_is_up $SEED_NODE{$_}) |
557 |
|
|
} keys %SEED_NODE; |
558 |
|
|
|
559 |
|
|
if (@seeds) { |
560 |
root |
1.70 |
# start connection attempt for every seed we are not connected to yet |
561 |
root |
1.69 |
seed_connect $_ |
562 |
|
|
for @seeds; |
563 |
root |
1.71 |
|
564 |
|
|
$SEED_RETRY = $SEED_RETRY * 2 + rand; |
565 |
|
|
$SEED_RETRY = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout} |
566 |
|
|
if $SEED_RETRY > $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout}; |
567 |
|
|
|
568 |
|
|
$SEED_WATCHER = AE::timer $SEED_RETRY, 0, \&seed_all; |
569 |
|
|
|
570 |
root |
1.69 |
} else { |
571 |
root |
1.71 |
# all seeds connected or connecting, no need to restart timer |
572 |
root |
1.69 |
undef $SEED_WATCHER; |
573 |
|
|
} |
574 |
|
|
} |
575 |
|
|
|
576 |
|
|
sub seed_again { |
577 |
root |
1.71 |
$SEED_RETRY = 1; |
578 |
|
|
$SEED_WATCHER ||= AE::timer 1, 0, \&seed_all; |
579 |
root |
1.69 |
} |
580 |
|
|
|
581 |
|
|
# sets new seed list, starts connecting |
582 |
|
|
sub set_seeds(@) { |
583 |
|
|
%SEED_NODE = (); |
584 |
root |
1.71 |
%NODE_SEED = (); |
585 |
|
|
%SEED_CONNECT = (); |
586 |
|
|
|
587 |
root |
1.69 |
@SEED_NODE{@_} = (); |
588 |
|
|
|
589 |
root |
1.71 |
seed_again;#d# |
590 |
|
|
seed_all; |
591 |
|
|
} |
592 |
|
|
|
593 |
|
|
mon_nodes sub { |
594 |
|
|
# if we lost the connection to a seed node, make sure we are seeding |
595 |
|
|
seed_again |
596 |
|
|
if !$_[1] && exists $NODE_SEED{$_[0]}; |
597 |
|
|
}; |
598 |
|
|
|
599 |
|
|
############################################################################# |
600 |
|
|
# talk with/to global nodes |
601 |
|
|
|
602 |
|
|
our $NODE_ADDR; # node => [listeners] - contains global nodes or, for global nodes, all nodes |
603 |
|
|
our $GLOBAL_ADDR; |
604 |
|
|
our $GLOBAL_MON; |
605 |
|
|
our $GLOBAL_TIMER; |
606 |
|
|
our $MASTER; # the global node we use for lookups ourselves |
607 |
|
|
|
608 |
|
|
# master requests |
609 |
|
|
our %GLOBAL_REQ; # [$cb, \@req] |
610 |
|
|
|
611 |
|
|
sub global_req { |
612 |
|
|
my $cb = pop; |
613 |
|
|
|
614 |
|
|
$GLOBAL_REQ{$cb+0} = [$cb, [@_]]; |
615 |
|
|
|
616 |
|
|
snd $MASTER, @_, $cb+0 |
617 |
|
|
if $MASTER; |
618 |
|
|
|
619 |
|
|
defined wantarray && AnyEvent::Util::guard { delete $GLOBAL_REQ{$cb+0} } |
620 |
|
|
} |
621 |
|
|
|
622 |
|
|
sub global_master { |
623 |
|
|
$MASTER = $_[0]; |
624 |
|
|
|
625 |
|
|
snd $MASTER, "global_slave"; |
626 |
|
|
# ask master for list of global nodes (already done by global_reg) |
627 |
|
|
# snd $MASTER, "global_db_get"; |
628 |
|
|
|
629 |
|
|
# send queued requests |
630 |
|
|
while (my ($k, $v) = each %GLOBAL_REQ) { |
631 |
|
|
snd $MASTER, @{$v->[1]}, $k; |
632 |
|
|
} |
633 |
|
|
} |
634 |
|
|
|
635 |
|
|
$node_req{global_reply} = sub { |
636 |
|
|
my $id = shift; |
637 |
|
|
|
638 |
|
|
my $cb = delete $GLOBAL_REQ{$id} |
639 |
|
|
or return; |
640 |
|
|
|
641 |
|
|
$cb->[0]->(@_); |
642 |
|
|
}; |
643 |
|
|
|
644 |
|
|
{#d# |
645 |
|
|
# global code |
646 |
|
|
|
647 |
|
|
our %SLAVE; |
648 |
|
|
|
649 |
|
|
# other node wants to make us the master |
650 |
|
|
$node_req{global_slave} = sub { |
651 |
|
|
undef $SLAVE{$SRCNODE->{id}}; |
652 |
|
|
snd $SRCNODE->{id}, global_db_set => $GLOBAL_ADDR; |
653 |
|
|
}; |
654 |
|
|
|
655 |
|
|
$node_req{global_find} = sub { |
656 |
|
|
my ($node, $id) = @_; |
657 |
|
|
|
658 |
|
|
snd $SRCNODE->{id}, global_reply => $id, $NODE_ADDR->{$node}; |
659 |
|
|
}; |
660 |
|
|
|
661 |
|
|
# delete slaves on node-down |
662 |
|
|
mon_nodes sub { |
663 |
|
|
return if $_[1]; |
664 |
|
|
|
665 |
|
|
delete $SLAVE{$_[0]}; |
666 |
|
|
}; |
667 |
|
|
|
668 |
|
|
}#d# |
669 |
|
|
|
670 |
|
|
# reply with global db |
671 |
|
|
$node_req{global_db_get} = sub { |
672 |
|
|
snd $SRCNODE->{id}, global_db_set => $GLOBAL_ADDR; |
673 |
|
|
}; |
674 |
|
|
|
675 |
|
|
$node_req{global_db_set} = sub { |
676 |
|
|
$GLOBAL_ADDR = shift; |
677 |
|
|
$GLOBAL_TIMER = AE::timer 0, $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout}, sub { |
678 |
|
|
(add_node $_)->connect |
679 |
|
|
for keys %$GLOBAL_ADDR; |
680 |
|
|
}; |
681 |
|
|
}; |
682 |
|
|
|
683 |
|
|
sub global_search { |
684 |
|
|
if ($GLOBAL) { |
685 |
|
|
$MASTER = $NODE; |
686 |
|
|
undef $GLOBAL_MON; |
687 |
|
|
} else { |
688 |
|
|
for (keys %NODE_SEED, keys %$GLOBAL_ADDR) { |
689 |
|
|
if (node_is_up $_) { |
690 |
|
|
global_master $_; |
691 |
|
|
return; |
692 |
|
|
} |
693 |
|
|
} |
694 |
|
|
|
695 |
|
|
$GLOBAL_MON = mon_nodes sub { |
696 |
|
|
return unless $_[1]; # we are only interested in node-ups |
697 |
|
|
return unless $NODE_SEED{$_[0]}; # we are only interested in seed nodes |
698 |
|
|
|
699 |
|
|
global_master $_[0]; |
700 |
|
|
|
701 |
|
|
$GLOBAL_MON = mon_nodes sub { |
702 |
|
|
if ($_[0] eq $MASTER && !$_[1]) { |
703 |
|
|
undef $MASTER; |
704 |
|
|
global_search (); |
705 |
|
|
} |
706 |
|
|
}; |
707 |
|
|
}; |
708 |
|
|
} |
709 |
|
|
} |
710 |
|
|
|
711 |
|
|
# register remote node listeners |
712 |
|
|
$node_req{global_reg} = sub { |
713 |
|
|
if ($GLOBAL) { |
714 |
|
|
$NODE_ADDR->{$SRCNODE->{id}} = $_[0]; |
715 |
|
|
} else { |
716 |
|
|
# should not happen normally, except when there are bad races |
717 |
|
|
$WARN->(1, "$SRCNODE->{id} treats us as global node, but we aren't"); |
718 |
|
|
} |
719 |
|
|
}; |
720 |
|
|
|
721 |
|
|
# also used |
722 |
|
|
$node_req{global_add} = sub { |
723 |
|
|
my ($node, $listener) = @_; |
724 |
|
|
|
725 |
|
|
# no-op if we already know the info |
726 |
|
|
return |
727 |
|
|
if (join "\x00", @$listener) eq (join "\x00", @{ $GLOBAL_ADDR->{$node} }); |
728 |
|
|
|
729 |
|
|
$GLOBAL_ADDR->{$node} = $listener; |
730 |
|
|
|
731 |
|
|
# let us be a good citizen and register (also connects) |
732 |
|
|
snd $node, global_reg => $LISTENER; |
733 |
|
|
|
734 |
|
|
# if we are global, we update all our slaves |
735 |
|
|
our %SLAVE; # ugh, will be in AnyEvent::MP::Global |
736 |
|
|
snd $_, global_add => $node, $listener |
737 |
|
|
for keys %SLAVE; |
738 |
|
|
}; |
739 |
|
|
|
740 |
|
|
$node_req{global_del} = sub { |
741 |
|
|
my ($node) = @_; |
742 |
|
|
|
743 |
|
|
delete $GLOBAL_ADDR->{$node}; |
744 |
|
|
}; |
745 |
|
|
|
746 |
|
|
# tell every global node our listeners |
747 |
|
|
push @AnyEvent::MP::Transport::HOOK_CONNECT, sub { |
748 |
|
|
snd $_[0]{remote_node}, global_reg => $LISTENER |
749 |
|
|
if $_[0]{remote_greeting}{global}; |
750 |
|
|
}; |
751 |
|
|
|
752 |
|
|
sub _become_global { #d# hack |
753 |
|
|
*_become_global = sub { }; |
754 |
|
|
|
755 |
|
|
warn "becoming global\n";#d# |
756 |
|
|
|
757 |
|
|
$GLOBAL = 1; |
758 |
|
|
global_search; |
759 |
|
|
|
760 |
|
|
$GLOBAL_ADDR->{$NODE} = $LISTENER; |
761 |
|
|
|
762 |
|
|
$GLOBAL_MON = mon_nodes sub { |
763 |
|
|
return if $_[1]; |
764 |
|
|
|
765 |
|
|
delete $NODE_ADDR->{$_[0]}; |
766 |
|
|
|
767 |
|
|
if (delete $GLOBAL_ADDR->{$_[0]}) { |
768 |
|
|
# if the node is global, tell our slaves |
769 |
|
|
|
770 |
|
|
warn "global_del $_[0]\n";#d# |
771 |
|
|
our %SLAVE; # ugh, will be in AnyEvent::MP::Global |
772 |
|
|
snd $_, global_del => $_[0] |
773 |
|
|
for keys %SLAVE; |
774 |
|
|
} |
775 |
|
|
}; |
776 |
|
|
|
777 |
|
|
# tell everybody who connects that we are a master |
778 |
|
|
push @AnyEvent::MP::Transport::HOOK_GREET, sub { |
779 |
|
|
$_[0]{local_greeting}{global} = 1; |
780 |
|
|
}; |
781 |
|
|
|
782 |
|
|
# tell every global node that connects that we are global too |
783 |
|
|
push @AnyEvent::MP::Transport::HOOK_CONNECT, sub { |
784 |
|
|
snd $_[0], global_add => $NODE, $LISTENER |
785 |
|
|
if $_[0]{remote_greeting}{global}; |
786 |
|
|
}; |
787 |
|
|
|
788 |
|
|
# tell everybody else that we are global now |
789 |
|
|
snd $_ => global_add => $NODE, $LISTENER |
790 |
|
|
for up_nodes; |
791 |
root |
1.69 |
} |
792 |
|
|
|
793 |
root |
1.71 |
global_search; |
794 |
|
|
|
795 |
root |
1.69 |
############################################################################# |
796 |
|
|
# configure |
797 |
|
|
|
798 |
|
|
sub _nodename { |
799 |
|
|
require POSIX; |
800 |
|
|
(POSIX::uname ())[1] |
801 |
|
|
} |
802 |
|
|
|
803 |
|
|
sub _resolve($) { |
804 |
|
|
my ($nodeid) = @_; |
805 |
|
|
|
806 |
|
|
my $cv = AE::cv; |
807 |
|
|
my @res; |
808 |
|
|
|
809 |
|
|
$cv->begin (sub { |
810 |
|
|
my %seen; |
811 |
|
|
my @refs; |
812 |
|
|
for (sort { $a->[0] <=> $b->[0] } @res) { |
813 |
|
|
push @refs, $_->[1] unless $seen{$_->[1]}++ |
814 |
|
|
} |
815 |
|
|
shift->send (@refs); |
816 |
|
|
}); |
817 |
|
|
|
818 |
|
|
my $idx; |
819 |
|
|
for my $t (split /,/, $nodeid) { |
820 |
|
|
my $pri = ++$idx; |
821 |
|
|
|
822 |
|
|
$t = length $t ? _nodename . ":$t" : _nodename |
823 |
|
|
if $t =~ /^\d*$/; |
824 |
|
|
|
825 |
|
|
my ($host, $port) = AnyEvent::Socket::parse_hostport $t, 0 |
826 |
|
|
or Carp::croak "$t: unparsable transport descriptor"; |
827 |
|
|
|
828 |
|
|
$port = "0" if $port eq "*"; |
829 |
|
|
|
830 |
|
|
if ($host eq "*") { |
831 |
|
|
$cv->begin; |
832 |
|
|
# use fork_call, as Net::Interface is big, and we need it rarely. |
833 |
|
|
require AnyEvent::Util; |
834 |
|
|
AnyEvent::Util::fork_call ( |
835 |
|
|
sub { |
836 |
|
|
my @addr; |
837 |
|
|
|
838 |
|
|
require Net::Interface; |
839 |
|
|
|
840 |
|
|
for my $if (Net::Interface->interfaces) { |
841 |
|
|
# we statically lower-prioritise ipv6 here, TODO :() |
842 |
|
|
for $_ ($if->address (Net::Interface::AF_INET ())) { |
843 |
|
|
next if /^\x7f/; # skip localhost etc. |
844 |
|
|
push @addr, $_; |
845 |
|
|
} |
846 |
|
|
for ($if->address (Net::Interface::AF_INET6 ())) { |
847 |
|
|
#next if $if->scope ($_) <= 2; |
848 |
|
|
next unless /^[\x20-\x3f\xfc\xfd]/; # global unicast, site-local unicast |
849 |
|
|
push @addr, $_; |
850 |
|
|
} |
851 |
|
|
|
852 |
|
|
} |
853 |
|
|
@addr |
854 |
|
|
}, sub { |
855 |
|
|
for my $ip (@_) { |
856 |
|
|
push @res, [ |
857 |
|
|
$pri += 1e-5, |
858 |
|
|
AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $ip, $port |
859 |
|
|
]; |
860 |
|
|
} |
861 |
|
|
$cv->end; |
862 |
|
|
} |
863 |
|
|
); |
864 |
|
|
} else { |
865 |
|
|
$cv->begin; |
866 |
|
|
AnyEvent::Socket::resolve_sockaddr $host, $port, "tcp", 0, undef, sub { |
867 |
|
|
for (@_) { |
868 |
|
|
my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3]; |
869 |
|
|
push @res, [ |
870 |
|
|
$pri += 1e-5, |
871 |
|
|
AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service |
872 |
|
|
]; |
873 |
|
|
} |
874 |
|
|
$cv->end; |
875 |
|
|
}; |
876 |
|
|
} |
877 |
|
|
} |
878 |
|
|
|
879 |
|
|
$cv->end; |
880 |
|
|
|
881 |
|
|
$cv |
882 |
|
|
} |
883 |
|
|
|
884 |
|
|
sub configure(@) { |
885 |
|
|
unshift @_, "profile" if @_ & 1; |
886 |
|
|
my (%kv) = @_; |
887 |
|
|
|
888 |
|
|
delete $NODE{$NODE}; # we do not support doing stuff before configure |
889 |
|
|
_init_names; |
890 |
|
|
|
891 |
|
|
my $profile = delete $kv{profile}; |
892 |
|
|
|
893 |
|
|
$profile = _nodename |
894 |
|
|
unless defined $profile; |
895 |
|
|
|
896 |
|
|
$CONFIG = AnyEvent::MP::Config::find_profile $profile, %kv; |
897 |
|
|
|
898 |
|
|
my $node = exists $CONFIG->{nodeid} ? $CONFIG->{nodeid} : $profile; |
899 |
|
|
|
900 |
|
|
$node or Carp::croak "$node: illegal node ID (see AnyEvent::MP manpage for syntax)\n"; |
901 |
|
|
|
902 |
|
|
$NODE = $node |
903 |
|
|
unless $node eq "anon/"; |
904 |
|
|
|
905 |
|
|
$NODE{$NODE} = $NODE{""}; |
906 |
|
|
$NODE{$NODE}{id} = $NODE; |
907 |
|
|
|
908 |
|
|
my $seeds = $CONFIG->{seeds}; |
909 |
|
|
my $binds = $CONFIG->{binds}; |
910 |
|
|
|
911 |
|
|
$binds ||= ["*"]; |
912 |
|
|
|
913 |
|
|
$WARN->(8, "node $NODE starting up."); |
914 |
|
|
|
915 |
|
|
$LISTENER = []; |
916 |
|
|
%LISTENER = (); |
917 |
|
|
|
918 |
|
|
for (map _resolve $_, @$binds) { |
919 |
|
|
for my $bind ($_->recv) { |
920 |
|
|
my ($host, $port) = AnyEvent::Socket::parse_hostport $bind |
921 |
|
|
or Carp::croak "$bind: unparsable local bind address"; |
922 |
|
|
|
923 |
|
|
my $listener = AnyEvent::MP::Transport::mp_server |
924 |
|
|
$host, |
925 |
|
|
$port, |
926 |
|
|
prepare => sub { |
927 |
|
|
my (undef, $host, $port) = @_; |
928 |
|
|
$bind = AnyEvent::Socket::format_hostport $host, $port; |
929 |
|
|
0 |
930 |
|
|
}, |
931 |
|
|
; |
932 |
|
|
$LISTENER{$bind} = $listener; |
933 |
|
|
push @$LISTENER, $bind; |
934 |
|
|
} |
935 |
|
|
} |
936 |
|
|
|
937 |
|
|
$WARN->(8, "node listens on [@$LISTENER]."); |
938 |
|
|
|
939 |
|
|
# the global service is mandatory currently |
940 |
root |
1.71 |
#require AnyEvent::MP::Global; |
941 |
root |
1.69 |
|
942 |
|
|
# connect to all seednodes |
943 |
|
|
set_seeds map $_->recv, map _resolve $_, @$seeds; |
944 |
|
|
|
945 |
root |
1.71 |
if ($NODE eq "atha") {;#d# |
946 |
|
|
my $w; $w = AE::timer 4, 0, sub { undef $w; _become_global }; |
947 |
|
|
} |
948 |
|
|
|
949 |
root |
1.69 |
for (@{ $CONFIG->{services} }) { |
950 |
|
|
if (ref) { |
951 |
|
|
my ($func, @args) = @$_; |
952 |
|
|
(load_func $func)->(@args); |
953 |
|
|
} elsif (s/::$//) { |
954 |
|
|
eval "require $_"; |
955 |
|
|
die $@ if $@; |
956 |
|
|
} else { |
957 |
|
|
(load_func $_)->(); |
958 |
|
|
} |
959 |
|
|
} |
960 |
|
|
} |
961 |
|
|
|
962 |
root |
1.1 |
=back |
963 |
|
|
|
964 |
|
|
=head1 SEE ALSO |
965 |
|
|
|
966 |
|
|
L<AnyEvent::MP>. |
967 |
|
|
|
968 |
|
|
=head1 AUTHOR |
969 |
|
|
|
970 |
|
|
Marc Lehmann <schmorp@schmorp.de> |
971 |
|
|
http://home.schmorp.de/ |
972 |
|
|
|
973 |
|
|
=cut |
974 |
|
|
|
975 |
|
|
1 |
976 |
|
|
|