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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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=head1 GLOBALS AND FUNCTIONS |
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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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1.79 |
use AnyEvent (); |
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use Guard (); |
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1.1 |
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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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1.79 |
db_set db_del db_reg |
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1.84 |
db_mon db_family db_keys db_values |
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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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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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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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=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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1.44 |
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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\&$func |
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} |
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my @alnum = ('0' .. '9', 'A' .. 'Z', 'a' .. 'z'); |
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1.1 |
sub nonce($) { |
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join "", map chr rand 256, 1 .. $_[0] |
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} |
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sub nonce62($) { |
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join "", map $alnum[rand 62], 1 .. $_[0] |
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} |
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sub gen_uniq { |
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my $now = AE::now; |
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(join "", |
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map $alnum[$_], |
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$$ / 62 % 62, |
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$$ % 62, |
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(int $now ) % 62, |
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(int $now * 100) % 62, |
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(int $now * 10000) % 62, |
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) . nonce62 4; |
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} |
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our $CONFIG; # this node's configuration |
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1.83 |
our $SECURE = sub { 1 }; |
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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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1.1 |
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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1.85 |
our %BINDS; |
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our $BINDS; # our listeners, as arrayref |
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1.1 |
|
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our $SRCNODE; # holds the sending node _object_ during _inject |
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|
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1.69 |
sub _init_names { |
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1.78 |
# ~54 bits, for local port names, lowercase $ID appended |
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$UNIQ = gen_uniq; |
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# ~59 bits, for remote port names, one longer than $UNIQ and uppercase at the end to avoid clashes |
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$RUNIQ = nonce62 10; |
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$RUNIQ =~ s/(.)$/\U$1/; |
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$NODE = "anon/$RUNIQ"; |
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1.64 |
} |
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1.69 |
_init_names; |
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1.64 |
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1.1 |
sub NODE() { |
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$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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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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1.42 |
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 |
&{ $PORT{+shift} or return }; |
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} |
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1.20 |
# this function adds a node-ref, so you can send stuff to it |
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# it is basically the central routing component. |
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sub add_node { |
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my ($node) = @_; |
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|
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1.94 |
length $node |
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or Carp::croak "'undef' or the empty string are not valid node/port IDs"; |
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1.93 |
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$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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|
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1.86 |
warn "SND $nodeid <- " . eval { JSON::XS->new->encode ([$portid, @_]) } . "\n" if TRACE && @_;#d# |
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|
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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 |
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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($$;@) { |
250 |
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1.21 |
my $nodeid = shift; |
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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 |
256 |
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if $nodeid ne $NODE; |
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1.71 |
($NODE{$nodeid} || add_node $nodeid)->{send} (["", @_]); |
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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($@) { |
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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] |
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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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1.29 |
sub eval_on($$;@) { |
282 |
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1.18 |
my $node = shift; |
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snd $node, eval => @_; |
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} |
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1.1 |
sub kil(@) { |
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1.21 |
my ($nodeid, $portid) = split /#/, shift, 2; |
288 |
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1.1 |
|
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length $portid |
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1.21 |
or Carp::croak "$nodeid#$portid: killing a node port is not allowed, caught"; |
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1.1 |
|
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1.21 |
($NODE{$nodeid} || add_node $nodeid) |
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1.1 |
->kill ("$portid", @_); |
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} |
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############################################################################# |
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1.6 |
# node monitoring and info |
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1.3 |
|
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1.21 |
=item node_is_up $nodeid |
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1.13 |
|
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Returns true if the given node is "up", that is, the kernel thinks it has |
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a working connection to it. |
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1.95 |
If the node is up, returns C<1>. If the node is currently connecting or |
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otherwise known but not connected, returns C<0>. If nothing is known about |
306 |
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the node, returns C<undef>. |
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1.13 |
|
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=cut |
309 |
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310 |
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sub node_is_up($) { |
311 |
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($NODE{$_[0]} or return)->{transport} |
312 |
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? 1 : 0 |
313 |
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} |
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1.3 |
=item up_nodes |
316 |
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|
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root |
1.26 |
Return the node IDs of all nodes that are currently connected (excluding |
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the node itself). |
319 |
root |
1.3 |
|
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=cut |
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1.49 |
sub up_nodes() { |
323 |
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1.26 |
map $_->{id}, grep $_->{transport}, values %NODE |
324 |
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1.3 |
} |
325 |
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|
326 |
root |
1.21 |
=item $guard = mon_nodes $callback->($nodeid, $is_up, @reason) |
327 |
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1.3 |
|
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1.27 |
Registers a callback that is called each time a node goes up (a connection |
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is established) or down (the connection is lost). |
330 |
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1.3 |
|
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Node up messages can only be followed by node down messages for the same |
332 |
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node, and vice versa. |
333 |
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|
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root |
1.71 |
Note that monitoring a node is usually better done by monitoring its node |
335 |
root |
1.27 |
port. This function is mainly of interest to modules that are concerned |
336 |
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about the network topology and low-level connection handling. |
337 |
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|
338 |
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Callbacks I<must not> block and I<should not> send any messages. |
339 |
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340 |
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The function returns an optional guard which can be used to unregister |
341 |
root |
1.3 |
the monitoring callback again. |
342 |
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|
343 |
root |
1.46 |
Example: make sure you call function C<newnode> for all nodes that are up |
344 |
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or go up (and down). |
345 |
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|
346 |
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newnode $_, 1 for up_nodes; |
347 |
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mon_nodes \&newnode; |
348 |
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|
349 |
root |
1.3 |
=cut |
350 |
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351 |
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our %MON_NODES; |
352 |
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353 |
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sub mon_nodes($) { |
354 |
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my ($cb) = @_; |
355 |
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|
356 |
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$MON_NODES{$cb+0} = $cb; |
357 |
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|
358 |
root |
1.90 |
defined wantarray |
359 |
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and Guard::guard { delete $MON_NODES{$cb+0} } |
360 |
root |
1.3 |
} |
361 |
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|
362 |
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sub _inject_nodeevent($$;@) { |
363 |
root |
1.16 |
my ($node, $up, @reason) = @_; |
364 |
root |
1.3 |
|
365 |
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for my $cb (values %MON_NODES) { |
366 |
root |
1.21 |
eval { $cb->($node->{id}, $up, @reason); 1 } |
367 |
root |
1.16 |
or $WARN->(1, $@); |
368 |
root |
1.3 |
} |
369 |
root |
1.16 |
|
370 |
root |
1.21 |
$WARN->(7, "$node->{id} is " . ($up ? "up" : "down") . " (@reason)"); |
371 |
root |
1.3 |
} |
372 |
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373 |
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############################################################################# |
374 |
root |
1.1 |
# self node code |
375 |
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|
376 |
root |
1.67 |
sub _kill { |
377 |
|
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my $port = shift; |
378 |
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|
379 |
|
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delete $PORT{$port} |
380 |
|
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or return; # killing nonexistent ports is O.K. |
381 |
|
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delete $PORT_DATA{$port}; |
382 |
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|
383 |
|
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my $mon = delete $LMON{$port} |
384 |
|
|
or !@_ |
385 |
|
|
or $WARN->(2, "unmonitored local port $port died with reason: @_"); |
386 |
|
|
|
387 |
|
|
$_->(@_) for values %$mon; |
388 |
|
|
} |
389 |
|
|
|
390 |
|
|
sub _monitor { |
391 |
|
|
return $_[2](no_such_port => "cannot monitor nonexistent port", "$NODE#$_[1]") |
392 |
|
|
unless exists $PORT{$_[1]}; |
393 |
|
|
|
394 |
|
|
$LMON{$_[1]}{$_[2]+0} = $_[2]; |
395 |
|
|
} |
396 |
|
|
|
397 |
|
|
sub _unmonitor { |
398 |
root |
1.68 |
delete $LMON{$_[1]}{$_[2]+0} |
399 |
|
|
if exists $LMON{$_[1]}; |
400 |
root |
1.67 |
} |
401 |
|
|
|
402 |
root |
1.83 |
sub _secure_check { |
403 |
|
|
$SECURE->($SRCNODE->{id}) |
404 |
root |
1.88 |
or $SRCNODE->{id} eq $NODE |
405 |
root |
1.83 |
or die "remote execution attempt by insecure node\n"; |
406 |
|
|
} |
407 |
|
|
|
408 |
root |
1.79 |
our %NODE_REQ = ( |
409 |
root |
1.1 |
# internal services |
410 |
|
|
|
411 |
|
|
# monitoring |
412 |
root |
1.65 |
mon0 => sub { # stop monitoring a port for another node |
413 |
root |
1.1 |
my $portid = shift; |
414 |
root |
1.91 |
_unmonitor undef, $portid, delete $NODE{$SRCNODE->{id}}{rmon}{$portid}; |
415 |
root |
1.1 |
}, |
416 |
root |
1.65 |
mon1 => sub { # start monitoring a port for another node |
417 |
root |
1.1 |
my $portid = shift; |
418 |
root |
1.91 |
Scalar::Util::weaken (my $node = $NODE{$SRCNODE->{id}}); |
419 |
root |
1.67 |
_monitor undef, $portid, $node->{rmon}{$portid} = sub { |
420 |
root |
1.58 |
delete $node->{rmon}{$portid}; |
421 |
root |
1.65 |
$node->send (["", kil0 => $portid, @_]) |
422 |
root |
1.59 |
if $node && $node->{transport}; |
423 |
root |
1.67 |
}; |
424 |
root |
1.1 |
}, |
425 |
root |
1.65 |
# another node has killed a monitored port |
426 |
|
|
kil0 => sub { |
427 |
root |
1.91 |
my $cbs = delete $NODE{$SRCNODE->{id}}{lmon}{+shift} |
428 |
root |
1.1 |
or return; |
429 |
|
|
|
430 |
|
|
$_->(@_) for @$cbs; |
431 |
|
|
}, |
432 |
|
|
|
433 |
root |
1.18 |
# "public" services - not actually public |
434 |
root |
1.1 |
|
435 |
root |
1.65 |
# another node wants to kill a local port |
436 |
root |
1.66 |
kil => \&_kill, |
437 |
root |
1.65 |
|
438 |
root |
1.88 |
# is the remote node considered secure? |
439 |
|
|
# secure => sub { |
440 |
|
|
# #TODO# |
441 |
|
|
# }, |
442 |
|
|
|
443 |
root |
1.1 |
# relay message to another node / generic echo |
444 |
root |
1.88 |
snd => sub { |
445 |
|
|
&_secure_check; |
446 |
|
|
&snd |
447 |
root |
1.1 |
}, |
448 |
|
|
|
449 |
root |
1.30 |
# random utilities |
450 |
root |
1.1 |
eval => sub { |
451 |
root |
1.83 |
&_secure_check; |
452 |
root |
1.50 |
my @res = do { package main; eval shift }; |
453 |
root |
1.1 |
snd @_, "$@", @res if @_; |
454 |
|
|
}, |
455 |
|
|
time => sub { |
456 |
root |
1.88 |
&_secure_check; |
457 |
root |
1.76 |
snd @_, AE::now; |
458 |
root |
1.1 |
}, |
459 |
|
|
devnull => sub { |
460 |
|
|
# |
461 |
|
|
}, |
462 |
root |
1.15 |
"" => sub { |
463 |
root |
1.27 |
# empty messages are keepalives or similar devnull-applications |
464 |
root |
1.15 |
}, |
465 |
root |
1.1 |
); |
466 |
|
|
|
467 |
root |
1.18 |
$NODE{""} = $NODE{$NODE} = new AnyEvent::MP::Node::Self $NODE; |
468 |
root |
1.1 |
$PORT{""} = sub { |
469 |
|
|
my $tag = shift; |
470 |
root |
1.83 |
eval { &{ $NODE_REQ{$tag} ||= do { &_secure_check; load_func $tag } } }; |
471 |
|
|
$WARN->(2, "error processing node message from $SRCNODE->{id}: $@") if $@; |
472 |
root |
1.1 |
}; |
473 |
|
|
|
474 |
root |
1.84 |
our $NPROTO = 1; |
475 |
|
|
|
476 |
|
|
# tell everybody who connects our nproto |
477 |
|
|
push @AnyEvent::MP::Transport::HOOK_GREET, sub { |
478 |
|
|
$_[0]{local_greeting}{nproto} = $NPROTO; |
479 |
|
|
}; |
480 |
|
|
|
481 |
root |
1.69 |
############################################################################# |
482 |
root |
1.71 |
# seed management, try to keep connections to all seeds at all times |
483 |
root |
1.69 |
|
484 |
root |
1.71 |
our %SEED_NODE; # seed ID => node ID|undef |
485 |
|
|
our %NODE_SEED; # map node ID to seed ID |
486 |
root |
1.69 |
our %SEED_CONNECT; # $seed => transport_connector | 1=connected | 2=connecting |
487 |
|
|
our $SEED_WATCHER; |
488 |
root |
1.71 |
our $SEED_RETRY; |
489 |
root |
1.69 |
|
490 |
|
|
sub seed_connect { |
491 |
|
|
my ($seed) = @_; |
492 |
|
|
|
493 |
|
|
my ($host, $port) = AnyEvent::Socket::parse_hostport $seed |
494 |
|
|
or Carp::croak "$seed: unparsable seed address"; |
495 |
|
|
|
496 |
|
|
$AnyEvent::MP::Kernel::WARN->(9, "trying connect to seed node $seed."); |
497 |
|
|
|
498 |
root |
1.71 |
$SEED_CONNECT{$seed} ||= AnyEvent::MP::Transport::mp_connect |
499 |
|
|
$host, $port, |
500 |
|
|
on_greeted => sub { |
501 |
|
|
# called after receiving remote greeting, learn remote node name |
502 |
|
|
|
503 |
|
|
# we rely on untrusted data here (the remote node name) this is |
504 |
|
|
# hopefully ok, as this can at most be used for DOSing, which is easy |
505 |
|
|
# when you can do MITM anyway. |
506 |
|
|
|
507 |
|
|
# if we connect to ourselves, nuke this seed, but make sure we act like a seed |
508 |
|
|
if ($_[0]{remote_node} eq $AnyEvent::MP::Kernel::NODE) { |
509 |
root |
1.72 |
require AnyEvent::MP::Global; # every seed becomes a global node currently |
510 |
root |
1.71 |
delete $SEED_NODE{$seed}; |
511 |
|
|
} else { |
512 |
|
|
$SEED_NODE{$seed} = $_[0]{remote_node}; |
513 |
|
|
$NODE_SEED{$_[0]{remote_node}} = $seed; |
514 |
root |
1.93 |
# also start global service, if not running |
515 |
|
|
# we need to check here in addition to the mon_nodes below |
516 |
|
|
# because we might only learn late that a node is a seed |
517 |
|
|
# and then we might already be connected |
518 |
|
|
snd $_[0]{remote_node}, "g_slave" |
519 |
|
|
unless $_[0]{remote_greeting}{global}; |
520 |
root |
1.71 |
} |
521 |
|
|
}, |
522 |
root |
1.93 |
sub { |
523 |
root |
1.71 |
delete $SEED_CONNECT{$seed}; |
524 |
|
|
} |
525 |
root |
1.69 |
; |
526 |
|
|
} |
527 |
|
|
|
528 |
|
|
sub seed_all { |
529 |
root |
1.93 |
my @seeds = grep |
530 |
|
|
!exists $SEED_CONNECT{$_} |
531 |
|
|
&& !(defined $SEED_NODE{$_} && node_is_up $SEED_NODE{$_}), |
532 |
|
|
keys %SEED_NODE; |
533 |
root |
1.69 |
|
534 |
|
|
if (@seeds) { |
535 |
root |
1.70 |
# start connection attempt for every seed we are not connected to yet |
536 |
root |
1.69 |
seed_connect $_ |
537 |
|
|
for @seeds; |
538 |
root |
1.71 |
|
539 |
|
|
$SEED_RETRY = $SEED_RETRY * 2 + rand; |
540 |
|
|
$SEED_RETRY = $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout} |
541 |
|
|
if $SEED_RETRY > $AnyEvent::MP::Kernel::CONFIG->{monitor_timeout}; |
542 |
|
|
|
543 |
|
|
$SEED_WATCHER = AE::timer $SEED_RETRY, 0, \&seed_all; |
544 |
|
|
|
545 |
root |
1.69 |
} else { |
546 |
root |
1.71 |
# all seeds connected or connecting, no need to restart timer |
547 |
root |
1.69 |
undef $SEED_WATCHER; |
548 |
|
|
} |
549 |
|
|
} |
550 |
|
|
|
551 |
|
|
sub seed_again { |
552 |
root |
1.71 |
$SEED_RETRY = 1; |
553 |
|
|
$SEED_WATCHER ||= AE::timer 1, 0, \&seed_all; |
554 |
root |
1.69 |
} |
555 |
|
|
|
556 |
|
|
# sets new seed list, starts connecting |
557 |
|
|
sub set_seeds(@) { |
558 |
|
|
%SEED_NODE = (); |
559 |
root |
1.71 |
%NODE_SEED = (); |
560 |
|
|
%SEED_CONNECT = (); |
561 |
|
|
|
562 |
root |
1.69 |
@SEED_NODE{@_} = (); |
563 |
|
|
|
564 |
root |
1.71 |
seed_all; |
565 |
|
|
} |
566 |
|
|
|
567 |
|
|
mon_nodes sub { |
568 |
root |
1.93 |
return unless exists $NODE_SEED{$_[0]}; |
569 |
|
|
|
570 |
|
|
if ($_[1]) { |
571 |
|
|
# each time a connection to a seed node goes up, make |
572 |
|
|
# sure it runs the global service. |
573 |
|
|
snd $_[0], "g_slave" |
574 |
|
|
unless $NODE{$_[0]}{transport}{remote_greeting}{global}; |
575 |
|
|
} else { |
576 |
|
|
# if we lost the connection to a seed node, make sure we are seeding |
577 |
|
|
seed_again; |
578 |
|
|
} |
579 |
root |
1.71 |
}; |
580 |
|
|
|
581 |
|
|
############################################################################# |
582 |
|
|
# talk with/to global nodes |
583 |
|
|
|
584 |
root |
1.72 |
# protocol messages: |
585 |
|
|
# |
586 |
root |
1.73 |
# sent by all slave nodes (slave to master) |
587 |
|
|
# g_slave database - make other global node master of the sender |
588 |
root |
1.72 |
# |
589 |
root |
1.73 |
# sent by any node to global nodes |
590 |
|
|
# g_set database - set whole database |
591 |
root |
1.89 |
# g_upd family set del - update single family |
592 |
root |
1.73 |
# g_del family key - delete key from database |
593 |
|
|
# g_get family key reply... - send reply with data |
594 |
|
|
# |
595 |
|
|
# send by global nodes |
596 |
|
|
# g_global - node became global, similar to global=1 greeting |
597 |
|
|
# |
598 |
|
|
# database families |
599 |
|
|
# "'l" -> node -> listeners |
600 |
|
|
# "'g" -> node -> undef |
601 |
|
|
# ... |
602 |
root |
1.72 |
# |
603 |
|
|
|
604 |
root |
1.73 |
# used on all nodes: |
605 |
root |
1.88 |
our $MASTER; # the global node we bind ourselves to |
606 |
root |
1.78 |
our $MASTER_MON; |
607 |
|
|
our %LOCAL_DB; # this node database |
608 |
|
|
|
609 |
|
|
our %GLOBAL_DB; # all local databases, merged - empty on non-global nodes |
610 |
root |
1.71 |
|
611 |
root |
1.84 |
our $GPROTO = 1; |
612 |
|
|
|
613 |
|
|
# tell everybody who connects our nproto |
614 |
|
|
push @AnyEvent::MP::Transport::HOOK_GREET, sub { |
615 |
|
|
$_[0]{local_greeting}{gproto} = $GPROTO; |
616 |
|
|
}; |
617 |
|
|
|
618 |
root |
1.73 |
############################################################################# |
619 |
|
|
# master selection |
620 |
|
|
|
621 |
|
|
# master requests |
622 |
|
|
our %GLOBAL_REQ; # $id => \@req |
623 |
root |
1.71 |
|
624 |
root |
1.74 |
sub global_req_add { |
625 |
root |
1.80 |
my ($id, $req) = @_; |
626 |
root |
1.71 |
|
627 |
root |
1.74 |
return if exists $GLOBAL_REQ{$id}; |
628 |
|
|
|
629 |
root |
1.80 |
$GLOBAL_REQ{$id} = $req; |
630 |
root |
1.71 |
|
631 |
root |
1.80 |
snd $MASTER, @$req |
632 |
root |
1.73 |
if $MASTER; |
633 |
root |
1.74 |
} |
634 |
root |
1.71 |
|
635 |
root |
1.74 |
sub global_req_del { |
636 |
|
|
delete $GLOBAL_REQ{$_[0]}; |
637 |
|
|
} |
638 |
|
|
|
639 |
root |
1.88 |
################################# |
640 |
|
|
# master rpc |
641 |
|
|
|
642 |
|
|
our %GLOBAL_RES; |
643 |
|
|
our $GLOBAL_RES_ID = "a"; |
644 |
|
|
|
645 |
|
|
sub global_call { |
646 |
|
|
my $id = ++$GLOBAL_RES_ID; |
647 |
|
|
$GLOBAL_RES{$id} = pop; |
648 |
|
|
global_req_add $id, [@_, $id]; |
649 |
|
|
} |
650 |
|
|
|
651 |
|
|
$NODE_REQ{g_reply} = sub { |
652 |
|
|
my $id = shift; |
653 |
|
|
global_req_del $id; |
654 |
|
|
my $cb = delete $GLOBAL_RES{$id} |
655 |
|
|
or return; |
656 |
|
|
&$cb |
657 |
|
|
}; |
658 |
|
|
|
659 |
|
|
################################# |
660 |
|
|
|
661 |
root |
1.74 |
sub g_find { |
662 |
root |
1.80 |
global_req_add "g_find $_[0]", [g_find => $_[0]]; |
663 |
root |
1.73 |
} |
664 |
root |
1.71 |
|
665 |
root |
1.73 |
# reply for g_find started in Node.pm |
666 |
root |
1.79 |
$NODE_REQ{g_found} = sub { |
667 |
root |
1.74 |
global_req_del "g_find $_[0]"; |
668 |
|
|
|
669 |
root |
1.73 |
my $node = $NODE{$_[0]} or return; |
670 |
root |
1.71 |
|
671 |
root |
1.79 |
$node->connect_to ($_[1]); |
672 |
root |
1.71 |
}; |
673 |
|
|
|
674 |
root |
1.73 |
sub master_set { |
675 |
|
|
$MASTER = $_[0]; |
676 |
root |
1.71 |
|
677 |
root |
1.73 |
snd $MASTER, g_slave => \%LOCAL_DB; |
678 |
root |
1.71 |
|
679 |
root |
1.73 |
# (re-)send queued requests |
680 |
|
|
snd $MASTER, @$_ |
681 |
|
|
for values %GLOBAL_REQ; |
682 |
|
|
} |
683 |
root |
1.71 |
|
684 |
root |
1.72 |
sub master_search { |
685 |
root |
1.73 |
#TODO: should also look for other global nodes, but we don't know them #d# |
686 |
|
|
for (keys %NODE_SEED) { |
687 |
root |
1.72 |
if (node_is_up $_) { |
688 |
|
|
master_set $_; |
689 |
|
|
return; |
690 |
root |
1.71 |
} |
691 |
root |
1.72 |
} |
692 |
root |
1.71 |
|
693 |
root |
1.78 |
$MASTER_MON = mon_nodes sub { |
694 |
root |
1.72 |
return unless $_[1]; # we are only interested in node-ups |
695 |
|
|
return unless $NODE_SEED{$_[0]}; # we are only interested in seed nodes |
696 |
root |
1.71 |
|
697 |
root |
1.72 |
master_set $_[0]; |
698 |
root |
1.71 |
|
699 |
root |
1.78 |
$MASTER_MON = mon_nodes sub { |
700 |
root |
1.72 |
if ($_[0] eq $MASTER && !$_[1]) { |
701 |
|
|
undef $MASTER; |
702 |
|
|
master_search (); |
703 |
|
|
} |
704 |
root |
1.71 |
}; |
705 |
root |
1.72 |
}; |
706 |
root |
1.71 |
} |
707 |
|
|
|
708 |
root |
1.73 |
# other node wants to make us the master |
709 |
root |
1.79 |
$NODE_REQ{g_slave} = sub { |
710 |
root |
1.73 |
my ($db) = @_; |
711 |
|
|
|
712 |
root |
1.80 |
# load global module and redo the request |
713 |
root |
1.73 |
require AnyEvent::MP::Global; |
714 |
root |
1.80 |
&{ $NODE_REQ{g_slave} } |
715 |
root |
1.71 |
}; |
716 |
|
|
|
717 |
root |
1.73 |
############################################################################# |
718 |
root |
1.79 |
# local database operations |
719 |
root |
1.71 |
|
720 |
root |
1.79 |
# local database management |
721 |
root |
1.88 |
|
722 |
root |
1.87 |
sub db_set($$;$) { |
723 |
root |
1.89 |
# if (ref $_[1]) { |
724 |
|
|
# # bulk |
725 |
|
|
# my @del = grep exists $LOCAL_DB{$_[0]}{$_}, keys ${ $_[1] }; |
726 |
|
|
# $LOCAL_DB{$_[0]} = $_[1]; |
727 |
|
|
# snd $MASTER, g_upd => $_[0] => $_[1], \@del |
728 |
|
|
# if defined $MASTER; |
729 |
|
|
# } else { |
730 |
|
|
# single-key |
731 |
|
|
$LOCAL_DB{$_[0]}{$_[1]} = $_[2]; |
732 |
|
|
snd $MASTER, g_upd => $_[0] => { $_[1] => $_[2] } |
733 |
|
|
if defined $MASTER; |
734 |
|
|
# } |
735 |
root |
1.79 |
} |
736 |
|
|
|
737 |
root |
1.89 |
sub db_del($@) { |
738 |
|
|
my $family = shift; |
739 |
|
|
|
740 |
|
|
delete @{ $LOCAL_DB{$family} }{@_}; |
741 |
|
|
snd $MASTER, g_upd => $family => undef, \@_ |
742 |
root |
1.79 |
if defined $MASTER; |
743 |
|
|
} |
744 |
|
|
|
745 |
|
|
sub db_reg($$;$) { |
746 |
|
|
my ($family, $key) = @_; |
747 |
|
|
&db_set; |
748 |
|
|
Guard::guard { db_del $family => $key } |
749 |
|
|
} |
750 |
root |
1.71 |
|
751 |
root |
1.88 |
# database query |
752 |
|
|
|
753 |
|
|
sub db_family { |
754 |
|
|
my ($family, $cb) = @_; |
755 |
|
|
global_call g_db_family => $family, $cb; |
756 |
|
|
} |
757 |
|
|
|
758 |
|
|
sub db_keys { |
759 |
|
|
my ($family, $cb) = @_; |
760 |
|
|
global_call g_db_keys => $family, $cb; |
761 |
|
|
} |
762 |
|
|
|
763 |
|
|
sub db_values { |
764 |
|
|
my ($family, $cb) = @_; |
765 |
|
|
global_call g_db_values => $family, $cb; |
766 |
root |
1.80 |
} |
767 |
|
|
|
768 |
root |
1.88 |
# database monitoring |
769 |
root |
1.80 |
|
770 |
root |
1.81 |
our %LOCAL_MON; # f, reply |
771 |
|
|
our %MON_DB; # f, k, value |
772 |
root |
1.80 |
|
773 |
root |
1.81 |
sub db_mon($@) { |
774 |
root |
1.84 |
my ($family, $cb) = @_; |
775 |
root |
1.81 |
|
776 |
root |
1.84 |
if (my $db = $MON_DB{$family}) { |
777 |
root |
1.89 |
# we already monitor, so create a "dummy" change event |
778 |
|
|
# this is postponed, which might be too late (we could process |
779 |
|
|
# change events), so disable the callback at first |
780 |
|
|
$LOCAL_MON{$family}{$cb+0} = sub { }; |
781 |
|
|
AE::postpone { |
782 |
|
|
return unless exists $LOCAL_MON{$family}{$cb+0}; # guard might have gone away already |
783 |
|
|
|
784 |
|
|
# set actual callback |
785 |
|
|
$LOCAL_MON{$family}{$cb+0} = $cb; |
786 |
|
|
$cb->($db, [keys %$db]); |
787 |
|
|
}; |
788 |
root |
1.81 |
} else { |
789 |
|
|
# new monitor, request chg1 from upstream |
790 |
root |
1.89 |
$LOCAL_MON{$family}{$cb+0} = $cb; |
791 |
root |
1.81 |
global_req_add "mon1 $family" => [g_mon1 => $family]; |
792 |
|
|
$MON_DB{$family} = {}; |
793 |
|
|
} |
794 |
|
|
|
795 |
root |
1.90 |
defined wantarray |
796 |
|
|
and Guard::guard { |
797 |
|
|
my $mon = $LOCAL_MON{$family}; |
798 |
|
|
delete $mon->{$cb+0}; |
799 |
|
|
|
800 |
|
|
unless (%$mon) { |
801 |
|
|
global_req_del "mon1 $family"; |
802 |
|
|
|
803 |
|
|
# no global_req, because we don't care if we are not connected |
804 |
|
|
snd $MASTER, g_mon0 => $family |
805 |
|
|
if $MASTER; |
806 |
root |
1.80 |
|
807 |
root |
1.90 |
delete $LOCAL_MON{$family}; |
808 |
|
|
delete $MON_DB{$family}; |
809 |
|
|
} |
810 |
root |
1.80 |
} |
811 |
|
|
} |
812 |
|
|
|
813 |
root |
1.82 |
# full update |
814 |
root |
1.80 |
$NODE_REQ{g_chg1} = sub { |
815 |
root |
1.84 |
my ($f, $ndb) = @_; |
816 |
|
|
|
817 |
|
|
my $db = $MON_DB{$f}; |
818 |
root |
1.89 |
my (@a, @c, @d); |
819 |
root |
1.81 |
|
820 |
root |
1.82 |
# add or replace keys |
821 |
root |
1.84 |
while (my ($k, $v) = each %$ndb) { |
822 |
root |
1.89 |
exists $db->{$k} |
823 |
|
|
? push @c, $k |
824 |
|
|
: push @a, $k; |
825 |
root |
1.84 |
$db->{$k} = $v; |
826 |
root |
1.82 |
} |
827 |
root |
1.81 |
|
828 |
root |
1.82 |
# delete keys that are no longer present |
829 |
root |
1.84 |
for (grep !exists $ndb->{$_}, keys %$db) { |
830 |
|
|
delete $db->{$_}; |
831 |
root |
1.89 |
push @d, $_; |
832 |
root |
1.81 |
} |
833 |
root |
1.84 |
|
834 |
root |
1.89 |
$_->($db, \@a, \@c, \@d) |
835 |
root |
1.84 |
for values %{ $LOCAL_MON{$_[0]} }; |
836 |
root |
1.80 |
}; |
837 |
|
|
|
838 |
root |
1.82 |
# incremental update |
839 |
root |
1.84 |
$NODE_REQ{g_chg2} = sub { |
840 |
root |
1.89 |
my ($family, $set, $del) = @_; |
841 |
|
|
|
842 |
|
|
my $db = $MON_DB{$family}; |
843 |
root |
1.84 |
|
844 |
root |
1.89 |
my (@a, @c); |
845 |
root |
1.84 |
|
846 |
root |
1.89 |
while (my ($k, $v) = each %$set) { |
847 |
|
|
exists $db->{$k} |
848 |
|
|
? push @c, $k |
849 |
|
|
: push @a, $k; |
850 |
|
|
$db->{$k} = $v; |
851 |
|
|
} |
852 |
|
|
|
853 |
|
|
delete @$db{@$del}; |
854 |
|
|
|
855 |
|
|
$_->($db, \@a, \@c, $del) |
856 |
|
|
for values %{ $LOCAL_MON{$family} }; |
857 |
root |
1.84 |
}; |
858 |
root |
1.80 |
|
859 |
root |
1.69 |
############################################################################# |
860 |
|
|
# configure |
861 |
|
|
|
862 |
root |
1.81 |
sub nodename { |
863 |
root |
1.69 |
require POSIX; |
864 |
|
|
(POSIX::uname ())[1] |
865 |
|
|
} |
866 |
|
|
|
867 |
|
|
sub _resolve($) { |
868 |
|
|
my ($nodeid) = @_; |
869 |
|
|
|
870 |
|
|
my $cv = AE::cv; |
871 |
|
|
my @res; |
872 |
|
|
|
873 |
|
|
$cv->begin (sub { |
874 |
|
|
my %seen; |
875 |
|
|
my @refs; |
876 |
|
|
for (sort { $a->[0] <=> $b->[0] } @res) { |
877 |
|
|
push @refs, $_->[1] unless $seen{$_->[1]}++ |
878 |
|
|
} |
879 |
|
|
shift->send (@refs); |
880 |
|
|
}); |
881 |
|
|
|
882 |
|
|
my $idx; |
883 |
|
|
for my $t (split /,/, $nodeid) { |
884 |
|
|
my $pri = ++$idx; |
885 |
|
|
|
886 |
root |
1.81 |
$t = length $t ? nodename . ":$t" : nodename |
887 |
root |
1.69 |
if $t =~ /^\d*$/; |
888 |
|
|
|
889 |
|
|
my ($host, $port) = AnyEvent::Socket::parse_hostport $t, 0 |
890 |
|
|
or Carp::croak "$t: unparsable transport descriptor"; |
891 |
|
|
|
892 |
|
|
$port = "0" if $port eq "*"; |
893 |
|
|
|
894 |
|
|
if ($host eq "*") { |
895 |
|
|
$cv->begin; |
896 |
|
|
# use fork_call, as Net::Interface is big, and we need it rarely. |
897 |
|
|
require AnyEvent::Util; |
898 |
|
|
AnyEvent::Util::fork_call ( |
899 |
|
|
sub { |
900 |
|
|
my @addr; |
901 |
|
|
|
902 |
|
|
require Net::Interface; |
903 |
|
|
|
904 |
|
|
for my $if (Net::Interface->interfaces) { |
905 |
|
|
# we statically lower-prioritise ipv6 here, TODO :() |
906 |
|
|
for $_ ($if->address (Net::Interface::AF_INET ())) { |
907 |
|
|
next if /^\x7f/; # skip localhost etc. |
908 |
|
|
push @addr, $_; |
909 |
|
|
} |
910 |
|
|
for ($if->address (Net::Interface::AF_INET6 ())) { |
911 |
|
|
#next if $if->scope ($_) <= 2; |
912 |
|
|
next unless /^[\x20-\x3f\xfc\xfd]/; # global unicast, site-local unicast |
913 |
|
|
push @addr, $_; |
914 |
|
|
} |
915 |
|
|
|
916 |
|
|
} |
917 |
|
|
@addr |
918 |
|
|
}, sub { |
919 |
|
|
for my $ip (@_) { |
920 |
|
|
push @res, [ |
921 |
|
|
$pri += 1e-5, |
922 |
|
|
AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $ip, $port |
923 |
|
|
]; |
924 |
|
|
} |
925 |
|
|
$cv->end; |
926 |
|
|
} |
927 |
|
|
); |
928 |
|
|
} else { |
929 |
|
|
$cv->begin; |
930 |
|
|
AnyEvent::Socket::resolve_sockaddr $host, $port, "tcp", 0, undef, sub { |
931 |
|
|
for (@_) { |
932 |
|
|
my ($service, $host) = AnyEvent::Socket::unpack_sockaddr $_->[3]; |
933 |
|
|
push @res, [ |
934 |
|
|
$pri += 1e-5, |
935 |
|
|
AnyEvent::Socket::format_hostport AnyEvent::Socket::format_address $host, $service |
936 |
|
|
]; |
937 |
|
|
} |
938 |
|
|
$cv->end; |
939 |
|
|
}; |
940 |
|
|
} |
941 |
|
|
} |
942 |
|
|
|
943 |
|
|
$cv->end; |
944 |
|
|
|
945 |
|
|
$cv |
946 |
|
|
} |
947 |
|
|
|
948 |
|
|
sub configure(@) { |
949 |
|
|
unshift @_, "profile" if @_ & 1; |
950 |
|
|
my (%kv) = @_; |
951 |
|
|
|
952 |
|
|
delete $NODE{$NODE}; # we do not support doing stuff before configure |
953 |
|
|
_init_names; |
954 |
|
|
|
955 |
|
|
my $profile = delete $kv{profile}; |
956 |
|
|
|
957 |
root |
1.81 |
$profile = nodename |
958 |
root |
1.69 |
unless defined $profile; |
959 |
|
|
|
960 |
|
|
$CONFIG = AnyEvent::MP::Config::find_profile $profile, %kv; |
961 |
|
|
|
962 |
root |
1.83 |
if (exists $CONFIG->{secure}) { |
963 |
|
|
my $pass = !$CONFIG->{secure}; |
964 |
|
|
$SECURE = sub { $pass }; |
965 |
|
|
} |
966 |
|
|
|
967 |
root |
1.72 |
my $node = exists $CONFIG->{nodeid} ? $CONFIG->{nodeid} : "$profile/"; |
968 |
root |
1.69 |
|
969 |
|
|
$node or Carp::croak "$node: illegal node ID (see AnyEvent::MP manpage for syntax)\n"; |
970 |
|
|
|
971 |
root |
1.72 |
$NODE = $node; |
972 |
root |
1.77 |
|
973 |
root |
1.81 |
$NODE =~ s/%n/nodename/ge; |
974 |
|
|
|
975 |
|
|
if ($NODE =~ s!(?:(?<=/)$|%u)!$RUNIQ!g) { |
976 |
root |
1.77 |
# nodes with randomised node names do not need randomised port names |
977 |
|
|
$UNIQ = ""; |
978 |
|
|
} |
979 |
root |
1.69 |
|
980 |
|
|
$NODE{$NODE} = $NODE{""}; |
981 |
|
|
$NODE{$NODE}{id} = $NODE; |
982 |
|
|
|
983 |
|
|
my $seeds = $CONFIG->{seeds}; |
984 |
|
|
my $binds = $CONFIG->{binds}; |
985 |
|
|
|
986 |
|
|
$binds ||= ["*"]; |
987 |
|
|
|
988 |
|
|
$WARN->(8, "node $NODE starting up."); |
989 |
|
|
|
990 |
root |
1.85 |
$BINDS = []; |
991 |
|
|
%BINDS = (); |
992 |
root |
1.69 |
|
993 |
|
|
for (map _resolve $_, @$binds) { |
994 |
|
|
for my $bind ($_->recv) { |
995 |
|
|
my ($host, $port) = AnyEvent::Socket::parse_hostport $bind |
996 |
|
|
or Carp::croak "$bind: unparsable local bind address"; |
997 |
|
|
|
998 |
|
|
my $listener = AnyEvent::MP::Transport::mp_server |
999 |
|
|
$host, |
1000 |
|
|
$port, |
1001 |
|
|
prepare => sub { |
1002 |
|
|
my (undef, $host, $port) = @_; |
1003 |
|
|
$bind = AnyEvent::Socket::format_hostport $host, $port; |
1004 |
|
|
0 |
1005 |
|
|
}, |
1006 |
|
|
; |
1007 |
root |
1.85 |
$BINDS{$bind} = $listener; |
1008 |
|
|
push @$BINDS, $bind; |
1009 |
root |
1.69 |
} |
1010 |
|
|
} |
1011 |
|
|
|
1012 |
root |
1.85 |
db_set "'l" => $NODE => $BINDS; |
1013 |
root |
1.73 |
|
1014 |
root |
1.85 |
$WARN->(8, "node listens on [@$BINDS]."); |
1015 |
root |
1.69 |
|
1016 |
|
|
# connect to all seednodes |
1017 |
|
|
set_seeds map $_->recv, map _resolve $_, @$seeds; |
1018 |
|
|
|
1019 |
root |
1.73 |
master_search; |
1020 |
|
|
|
1021 |
root |
1.69 |
for (@{ $CONFIG->{services} }) { |
1022 |
|
|
if (ref) { |
1023 |
|
|
my ($func, @args) = @$_; |
1024 |
|
|
(load_func $func)->(@args); |
1025 |
|
|
} elsif (s/::$//) { |
1026 |
|
|
eval "require $_"; |
1027 |
|
|
die $@ if $@; |
1028 |
|
|
} else { |
1029 |
|
|
(load_func $_)->(); |
1030 |
|
|
} |
1031 |
|
|
} |
1032 |
|
|
} |
1033 |
|
|
|
1034 |
root |
1.1 |
=back |
1035 |
|
|
|
1036 |
|
|
=head1 SEE ALSO |
1037 |
|
|
|
1038 |
|
|
L<AnyEvent::MP>. |
1039 |
|
|
|
1040 |
|
|
=head1 AUTHOR |
1041 |
|
|
|
1042 |
|
|
Marc Lehmann <schmorp@schmorp.de> |
1043 |
|
|
http://home.schmorp.de/ |
1044 |
|
|
|
1045 |
|
|
=cut |
1046 |
|
|
|
1047 |
|
|
1 |
1048 |
|
|
|