MERGE r386:r480 FROM https://svn.perl.org/qpsmtpd/branches/high_perf
High perf branch merge and fixes git-svn-id: https://svn.perl.org/qpsmtpd/trunk@497 958fd67b-6ff1-0310-b445-bb7760255be9
This commit is contained in:
Matt Sergeant
parent
9683016276
commit
e407e8b470
147
lib/Danga/Client.pm
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147
lib/Danga/Client.pm
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# $Id: Client.pm,v 1.8 2005/02/14 22:06:38 msergeant Exp $
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package Danga::Client;
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use base 'Danga::TimeoutSocket';
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use fields qw(line closing disable_read can_read_mode);
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use Time::HiRes ();
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# 30 seconds max timeout!
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sub max_idle_time { 30 }
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sub max_connect_time { 1200 }
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sub new {
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my Danga::Client $self = shift;
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$self = fields::new($self) unless ref $self;
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$self->SUPER::new( @_ );
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$self->reset_for_next_message;
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return $self;
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}
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sub reset_for_next_message {
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my Danga::Client $self = shift;
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$self->{line} = '';
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$self->{disable_read} = 0;
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$self->{can_read_mode} = 0;
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return $self;
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}
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sub get_line {
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my Danga::Client $self = shift;
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if (!$self->have_line) {
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$self->SetPostLoopCallback(sub { $self->have_line ? 0 : 1 });
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#warn("get_line PRE\n");
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$self->EventLoop();
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#warn("get_line POST\n");
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$self->disable_read();
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}
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return if $self->{closing};
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# now have a line.
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$self->{alive_time} = time;
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$self->{line} =~ s/^(.*?\n)//;
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return $1;
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}
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sub can_read {
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my Danga::Client $self = shift;
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my ($timeout) = @_;
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my $end = Time::HiRes::time() + $timeout;
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# warn("Calling can-read\n");
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$self->{can_read_mode} = 1;
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if (!length($self->{line})) {
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$self->disable_read();
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# loop because any callback, not just ours, can make EventLoop return
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while( !(length($self->{line}) || (Time::HiRes::time > $end)) ) {
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$self->SetPostLoopCallback(sub { (length($self->{line}) ||
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(Time::HiRes::time > $end)) ? 0 : 1 });
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#warn("get_line PRE\n");
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$self->EventLoop();
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#warn("get_line POST\n");
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}
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$self->enable_read();
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}
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$self->{can_read_mode} = 0;
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$self->SetPostLoopCallback(undef);
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return if $self->{closing};
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$self->{alive_time} = time;
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# warn("can_read returning for '$self->{line}'\n");
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return 1 if length($self->{line});
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return;
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}
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sub have_line {
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my Danga::Client $self = shift;
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return 1 if $self->{closing};
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if ($self->{line} =~ /\n/) {
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return 1;
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}
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return 0;
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}
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sub event_read {
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my Danga::Client $self = shift;
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my $bref = $self->read(8192);
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return $self->close($!) unless defined $bref;
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# $self->watch_read(0);
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$self->process_read_buf($bref);
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}
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sub process_read_buf {
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my Danga::Client $self = shift;
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my $bref = shift;
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$self->{line} .= $$bref;
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return if ! $self->readable();
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return if $::LineMode;
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while ($self->{line} =~ s/^(.*?\n)//) {
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my $line = $1;
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$self->{alive_time} = time;
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my $resp = $self->process_line($line);
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if ($::DEBUG > 1 and $resp) { print "$$:".($self+0)."S: $_\n" for split(/\n/, $resp) }
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$self->write($resp) if $resp;
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$self->watch_read(0) if $self->{disable_read};
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last if ! $self->readable();
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}
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if($self->have_line) {
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$self->shift_back_read($self->{line});
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$self->{line} = '';
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}
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}
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sub readable {
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my Danga::Client $self = shift;
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return 0 if $self->{disable_read} > 0;
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return 1;
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}
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sub disable_read {
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my Danga::Client $self = shift;
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$self->{disable_read}++;
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$self->watch_read(0);
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}
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sub enable_read {
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my Danga::Client $self = shift;
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$self->{disable_read}--;
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if ($self->{disable_read} <= 0) {
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$self->{disable_read} = 0;
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$self->watch_read(1);
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}
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}
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sub process_line {
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my Danga::Client $self = shift;
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return '';
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}
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sub close {
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my Danga::Client $self = shift;
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$self->{closing} = 1;
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print "closing @_\n" if $::DEBUG;
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$self->SUPER::close(@_);
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}
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sub event_err { my Danga::Client $self = shift; $self->close("Error") }
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sub event_hup { my Danga::Client $self = shift; $self->close("Disconnect (HUP)") }
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1;
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170
lib/Danga/DNS.pm
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170
lib/Danga/DNS.pm
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# $Id: DNS.pm,v 1.12 2005/02/14 22:06:08 msergeant Exp $
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package Danga::DNS;
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# This is the query class - it is really just an encapsulation of the
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# hosts you want to query, plus the callback. All the hard work is done
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# in Danga::DNS::Resolver.
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use fields qw(client hosts num_hosts callback results start);
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use strict;
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use Danga::DNS::Resolver;
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my $resolver;
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sub trace {
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my $level = shift;
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print STDERR ("[$$] dns lookup: @_") if $::DEBUG >= $level;
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}
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sub new {
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my Danga::DNS $self = shift;
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my %options = @_;
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$resolver ||= Danga::DNS::Resolver->new();
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my $client = $options{client};
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$client->disable_read if $client;
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$self = fields::new($self) unless ref $self;
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$self->{hosts} = $options{hosts} ? $options{hosts} : [ $options{host} ];
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$self->{num_hosts} = scalar(@{$self->{hosts}}) || "No hosts supplied";
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$self->{client} = $client;
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$self->{callback} = $options{callback} || die "No callback given";
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$self->{results} = {};
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$self->{start} = time;
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if ($options{type}) {
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if ($options{type} eq 'TXT') {
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if (!$resolver->query_txt($self, @{$self->{hosts}})) {
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$client->enable_read() if $client;
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return;
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}
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}
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elsif ($options{type} eq 'A') {
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if (!$resolver->query($self, @{$self->{hosts}})) {
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$client->enable_read() if $client;
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return;
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}
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}
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elsif ($options{type} eq 'PTR') {
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if (!$resolver->query($self, @{$self->{hosts}})) {
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$client->enable_read() if $client;
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return;
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}
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}
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elsif ($options{type} eq 'MX') {
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if (!$resolver->query_mx($self, @{$self->{hosts}})) {
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$client->enable_read() if $client;
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return;
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}
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}
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else {
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die "Unsupported DNS query type: $options{type}";
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}
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}
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else {
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if (!$resolver->query($self, @{$self->{hosts}})) {
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$client->enable_read() if $client;
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return;
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}
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}
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return $self;
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}
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sub run_callback {
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my Danga::DNS $self = shift;
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my ($result, $query) = @_;
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$self->{results}{$query} = $result;
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trace(2, "got $query => $result\n");
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eval {
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$self->{callback}->($result, $query);
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};
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if ($@) {
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warn($@);
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}
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}
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sub DESTROY {
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my Danga::DNS $self = shift;
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my $now = time;
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foreach my $host (@{$self->{hosts}}) {
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if (!exists($self->{results}{$host})) {
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print STDERR "DNS timeout (presumably) looking for $host after " . ($now - $self->{start}) . " secs\n";
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$self->{callback}->("NXDOMAIN", $host);
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}
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}
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$self->{client}->enable_read if $self->{client};
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}
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1;
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=head1 NAME
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Danga::DNS - a DNS lookup class for the Danga::Socket framework
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=head1 SYNOPSIS
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Danga::DNS->new(%options);
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=head1 DESCRIPTION
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This module performs asynchronous DNS lookups, making use of a single UDP
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socket (unlike Net::DNS's bgsend/bgread combination), and blocking reading on
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a client until the response comes back (this is useful for e.g. SMTP rDNS
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lookups where you want the answer before you see the next SMTP command).
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Currently this module will only perform A or PTR lookups. A rDNS (PTR) lookup
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will be performed if the host matches the regexp: C</^\d+\.\d+\.\d+.\d+$/>.
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The lookups time out after 15 seconds.
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=head1 API
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=head2 C<< Danga::DNS->new( %options ) >>
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Create a new DNS query. You do not need to store the resulting object as this
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class is all done with callbacks.
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Example:
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Danga::DNS->new(
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callback => sub { print "Got result: $_[0]\n" },
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host => 'google.com',
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);
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=over 4
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=item B<[required]> C<callback>
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The callback to call when results come in. This should be a reference to a
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subroutine. The callback receives two parameters - the result of the DNS lookup
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and the host that was looked up.
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=item C<host>
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A host name to lookup. Note that if the hostname is a dotted quad of numbers then
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a reverse DNS (PTR) lookup is performend.
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=item C<hosts>
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An array-ref list of hosts to lookup.
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B<NOTE:> One of either C<host> or C<hosts> is B<required>.
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=item C<client>
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It is possible to specify a C<Danga::Client> object (or subclass) which you wish
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to disable for reading until your DNS result returns.
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=item C<type>
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You can specify one of: I<"A">, I<"PTR"> or I<"TXT"> here. Other types may be
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supported in the future.
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=back
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=cut
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307
lib/Danga/DNS/Resolver.pm
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307
lib/Danga/DNS/Resolver.pm
Normal file
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# $Id: Resolver.pm,v 1.3 2005/02/14 22:06:08 msergeant Exp $
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package Danga::DNS::Resolver;
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use base qw(Danga::Socket);
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use fields qw(res dst id_to_asker id_to_query timeout cache cache_timeout);
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use Net::DNS;
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use Socket;
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use strict;
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our $last_cleanup = 0;
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sub trace {
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my $level = shift;
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print ("$::DEBUG/$level [$$] dns lookup: @_") if $::DEBUG >= $level;
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|
}
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sub new {
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my Danga::DNS::Resolver $self = shift;
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$self = fields::new($self) unless ref $self;
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my $res = Net::DNS::Resolver->new;
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my $sock = IO::Socket::INET->new(
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Proto => 'udp',
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LocalAddr => $res->{'srcaddr'},
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LocalPort => ($res->{'srcport'} || undef),
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) || die "Cannot create socket: $!";
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IO::Handle::blocking($sock, 0);
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trace(2, "Using nameserver $res->{nameservers}->[0]:$res->{port}\n");
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my $dst_sockaddr = sockaddr_in($res->{'port'}, inet_aton($res->{'nameservers'}->[0]));
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#my $dst_sockaddr = sockaddr_in($res->{'port'}, inet_aton('127.0.0.1'));
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#my $dst_sockaddr = sockaddr_in($res->{'port'}, inet_aton('10.2.1.20'));
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$self->{res} = $res;
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$self->{dst} = $dst_sockaddr;
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$self->{id_to_asker} = {};
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$self->{id_to_query} = {};
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$self->{timeout} = {};
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|
$self->{cache} = {};
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|
$self->{cache_timeout} = {};
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$self->SUPER::new($sock);
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$self->watch_read(1);
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$self->AddTimer(5, sub { $self->_do_cleanup });
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return $self;
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}
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sub pending {
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my Danga::DNS::Resolver $self = shift;
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return keys(%{$self->{id_to_asker}});
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}
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sub _query {
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my Danga::DNS::Resolver $self = shift;
|
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my ($asker, $host, $type, $now) = @_;
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|
|
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|
if ($ENV{NODNS}) {
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$asker->run_callback("NXDNS", $host);
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return 1;
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||||||
|
}
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||||||
|
if (exists $self->{cache}{$type}{$host}) {
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||||||
|
# print "CACHE HIT!\n";
|
||||||
|
$asker->run_callback($self->{cache}{$type}{$host}, $host);
|
||||||
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return 1;
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||||||
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}
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|
|
||||||
|
my $packet = $self->{res}->make_query_packet($host, $type);
|
||||||
|
my $packet_data = $packet->data;
|
||||||
|
|
||||||
|
my $h = $packet->header;
|
||||||
|
my $id = $h->id;
|
||||||
|
|
||||||
|
if (!$self->sock->send($packet_data, 0, $self->{dst})) {
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
trace(2, "Query: $host ($id)\n");
|
||||||
|
|
||||||
|
$self->{id_to_asker}->{$id} = $asker;
|
||||||
|
$self->{id_to_query}->{$id} = $host;
|
||||||
|
$self->{timeout}->{$id} = $now;
|
||||||
|
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
sub query_txt {
|
||||||
|
my Danga::DNS::Resolver $self = shift;
|
||||||
|
my ($asker, @hosts) = @_;
|
||||||
|
|
||||||
|
my $now = time();
|
||||||
|
|
||||||
|
trace(2, "[" . keys(%{$self->{id_to_asker}}) . "] trying to resolve TXT: @hosts\n");
|
||||||
|
|
||||||
|
foreach my $host (@hosts) {
|
||||||
|
$self->_query($asker, $host, 'TXT', $now) || return;
|
||||||
|
}
|
||||||
|
|
||||||
|
#print "+Pending queries: " . keys(%{$self->{id_to_asker}}) .
|
||||||
|
# " / Cache Size: " . keys(%{$self->{cache}}) . "\n";
|
||||||
|
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
sub query_mx {
|
||||||
|
my Danga::DNS::Resolver $self = shift;
|
||||||
|
my ($asker, @hosts) = @_;
|
||||||
|
|
||||||
|
my $now = time();
|
||||||
|
|
||||||
|
trace(2, "[" . keys(%{$self->{id_to_asker}}) . "] trying to resolve MX: @hosts\n");
|
||||||
|
|
||||||
|
foreach my $host (@hosts) {
|
||||||
|
$self->_query($asker, $host, 'MX', $now) || return;
|
||||||
|
}
|
||||||
|
|
||||||
|
#print "+Pending queries: " . keys(%{$self->{id_to_asker}}) .
|
||||||
|
# " / Cache Size: " . keys(%{$self->{cache}}) . "\n";
|
||||||
|
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
sub query {
|
||||||
|
my Danga::DNS::Resolver $self = shift;
|
||||||
|
my ($asker, @hosts) = @_;
|
||||||
|
|
||||||
|
my $now = time();
|
||||||
|
|
||||||
|
trace(2, "[" . keys(%{$self->{id_to_asker}}) . "] trying to resolve A/PTR: @hosts\n");
|
||||||
|
|
||||||
|
foreach my $host (@hosts) {
|
||||||
|
$self->_query($asker, $host, 'A', $now) || return;
|
||||||
|
}
|
||||||
|
|
||||||
|
#print "+Pending queries: " . keys(%{$self->{id_to_asker}}) .
|
||||||
|
# " / Cache Size: " . keys(%{$self->{cache}}) . "\n";
|
||||||
|
|
||||||
|
return 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
sub _do_cleanup {
|
||||||
|
my Danga::DNS::Resolver $self = shift;
|
||||||
|
my $now = time;
|
||||||
|
|
||||||
|
$self->AddTimer(5, sub { $self->_do_cleanup });
|
||||||
|
|
||||||
|
my $idle = $self->max_idle_time;
|
||||||
|
|
||||||
|
my @to_delete;
|
||||||
|
while (my ($id, $t) = each(%{$self->{timeout}})) {
|
||||||
|
if ($t < ($now - $idle)) {
|
||||||
|
push @to_delete, $id;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
foreach my $id (@to_delete) {
|
||||||
|
delete $self->{timeout}{$id};
|
||||||
|
my $asker = delete $self->{id_to_asker}{$id};
|
||||||
|
my $query = delete $self->{id_to_query}{$id};
|
||||||
|
$asker->run_callback("NXDOMAIN", $query);
|
||||||
|
}
|
||||||
|
|
||||||
|
foreach my $type ('A', 'TXT') {
|
||||||
|
@to_delete = ();
|
||||||
|
|
||||||
|
while (my ($query, $t) = each(%{$self->{cache_timeout}{$type}})) {
|
||||||
|
if ($t < $now) {
|
||||||
|
push @to_delete, $query;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
foreach my $q (@to_delete) {
|
||||||
|
delete $self->{cache_timeout}{$type}{$q};
|
||||||
|
delete $self->{cache}{$type}{$q};
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
# seconds max timeout!
|
||||||
|
sub max_idle_time { 30 }
|
||||||
|
|
||||||
|
# Danga::DNS
|
||||||
|
sub event_err { shift->close("dns socket error") }
|
||||||
|
sub event_hup { shift->close("dns socket error") }
|
||||||
|
|
||||||
|
sub event_read {
|
||||||
|
my Danga::DNS::Resolver $self = shift;
|
||||||
|
|
||||||
|
while (my $packet = $self->{res}->bgread($self->sock)) {
|
||||||
|
my $err = $self->{res}->errorstring;
|
||||||
|
my $answers = 0;
|
||||||
|
my $header = $packet->header;
|
||||||
|
my $id = $header->id;
|
||||||
|
|
||||||
|
my $asker = delete $self->{id_to_asker}->{$id};
|
||||||
|
my $query = delete $self->{id_to_query}->{$id};
|
||||||
|
delete $self->{timeout}{$id};
|
||||||
|
|
||||||
|
#print "-Pending queries: " . keys(%{$self->{id_to_asker}}) .
|
||||||
|
# " / Cache Size: " . keys(%{$self->{cache}}) . "\n";
|
||||||
|
if (!$asker) {
|
||||||
|
trace(1, "No asker for id: $id\n");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
my $now = time();
|
||||||
|
my @questions = $packet->question;
|
||||||
|
#print STDERR "response to ", $questions[0]->string, "\n";
|
||||||
|
foreach my $rr ($packet->answer) {
|
||||||
|
# my $q = shift @questions;
|
||||||
|
if ($rr->type eq "PTR") {
|
||||||
|
my $rdns = $rr->ptrdname;
|
||||||
|
if ($query) {
|
||||||
|
# NB: Cached as an "A" lookup as there's no overlap and they
|
||||||
|
# go through the same query() function above
|
||||||
|
$self->{cache}{A}{$query} = $rdns;
|
||||||
|
$self->{cache_timeout}{A}{$query} = $now + 60; # should use $rr->ttl but that would cache for too long
|
||||||
|
}
|
||||||
|
$asker->run_callback($rdns, $query);
|
||||||
|
}
|
||||||
|
elsif ($rr->type eq "A") {
|
||||||
|
my $ip = $rr->address;
|
||||||
|
if ($query) {
|
||||||
|
$self->{cache}{A}{$query} = $ip;
|
||||||
|
$self->{cache_timeout}{A}{$query} = $now + 60; # should use $rr->ttl but that would cache for too long
|
||||||
|
}
|
||||||
|
$asker->run_callback($ip, $query);
|
||||||
|
}
|
||||||
|
elsif ($rr->type eq "TXT") {
|
||||||
|
my $txt = $rr->txtdata;
|
||||||
|
if ($query) {
|
||||||
|
$self->{cache}{TXT}{$query} = $txt;
|
||||||
|
$self->{cache_timeout}{TXT}{$query} = $now + 60; # should use $rr->ttl but that would cache for too long
|
||||||
|
}
|
||||||
|
$asker->run_callback($txt, $query);
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
# came back, but not a PTR or A record
|
||||||
|
$asker->run_callback("unknown", $query);
|
||||||
|
}
|
||||||
|
$answers++;
|
||||||
|
}
|
||||||
|
if (!$answers) {
|
||||||
|
if ($err eq "NXDOMAIN") {
|
||||||
|
# trace("found => NXDOMAIN\n");
|
||||||
|
$asker->run_callback("NXDOMAIN", $query);
|
||||||
|
}
|
||||||
|
elsif ($err eq "SERVFAIL") {
|
||||||
|
# try again???
|
||||||
|
print "SERVFAIL looking for $query (Pending: " . keys(%{$self->{id_to_asker}}) . ")\n";
|
||||||
|
#$self->query($asker, $query);
|
||||||
|
$asker->run_callback($err, $query);
|
||||||
|
#$self->{id_to_asker}->{$id} = $asker;
|
||||||
|
#$self->{id_to_query}->{$id} = $query;
|
||||||
|
#$self->{timeout}{$id} = time();
|
||||||
|
|
||||||
|
}
|
||||||
|
elsif ($err eq "NOERROR") {
|
||||||
|
$asker->run_callback($err, $query);
|
||||||
|
}
|
||||||
|
elsif($err) {
|
||||||
|
print("error: $err\n");
|
||||||
|
$asker->run_callback($err, $query);
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
# trace("no answers\n");
|
||||||
|
$asker->run_callback("NXDOMAIN", $query);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
use Carp qw(confess);
|
||||||
|
|
||||||
|
sub close {
|
||||||
|
my Danga::DNS::Resolver $self = shift;
|
||||||
|
|
||||||
|
$self->SUPER::close(shift);
|
||||||
|
# confess "Danga::DNS::Resolver socket should never be closed!";
|
||||||
|
}
|
||||||
|
|
||||||
|
1;
|
||||||
|
|
||||||
|
=head1 NAME
|
||||||
|
|
||||||
|
Danga::DNS::Resolver - an asynchronous DNS resolver class
|
||||||
|
|
||||||
|
=head1 SYNOPSIS
|
||||||
|
|
||||||
|
my $res = Danga::DNS::Resolver->new();
|
||||||
|
|
||||||
|
$res->query($obj, @hosts); # $obj implements $obj->run_callback()
|
||||||
|
|
||||||
|
=head1 DESCRIPTION
|
||||||
|
|
||||||
|
This is a low level DNS resolver class that works within the Danga::Socket
|
||||||
|
asynchronous I/O framework. Do not attempt to use this class standalone - use
|
||||||
|
the C<Danga::DNS> class instead.
|
||||||
|
|
||||||
|
=cut
|
||||||
899
lib/Danga/Socket.pm
Normal file
899
lib/Danga/Socket.pm
Normal file
@ -0,0 +1,899 @@
|
|||||||
|
###########################################################################
|
||||||
|
|
||||||
|
=head1 NAME
|
||||||
|
|
||||||
|
Danga::Socket - Event-driven async IO class
|
||||||
|
|
||||||
|
=head1 SYNOPSIS
|
||||||
|
|
||||||
|
use base ('Danga::Socket');
|
||||||
|
|
||||||
|
=head1 DESCRIPTION
|
||||||
|
|
||||||
|
This is an abstract base class which provides the basic framework for
|
||||||
|
event-driven asynchronous IO.
|
||||||
|
|
||||||
|
=cut
|
||||||
|
|
||||||
|
###########################################################################
|
||||||
|
|
||||||
|
package Danga::Socket;
|
||||||
|
use strict;
|
||||||
|
|
||||||
|
use vars qw{$VERSION};
|
||||||
|
$VERSION = do { my @r = (q$Revision: 1.4 $ =~ /\d+/g); sprintf "%d."."%02d" x $#r, @r };
|
||||||
|
|
||||||
|
use fields qw(sock fd write_buf write_buf_offset write_buf_size
|
||||||
|
read_push_back post_loop_callback
|
||||||
|
peer_ip
|
||||||
|
closed event_watch debug_level);
|
||||||
|
|
||||||
|
use Errno qw(EINPROGRESS EWOULDBLOCK EISCONN
|
||||||
|
EPIPE EAGAIN EBADF ECONNRESET);
|
||||||
|
|
||||||
|
use Socket qw(IPPROTO_TCP);
|
||||||
|
use Carp qw{croak confess};
|
||||||
|
|
||||||
|
use constant TCP_CORK => 3; # FIXME: not hard-coded (Linux-specific too)
|
||||||
|
|
||||||
|
use constant DebugLevel => 0;
|
||||||
|
|
||||||
|
# for epoll definitions:
|
||||||
|
our $HAVE_SYSCALL_PH = eval { require 'syscall.ph'; 1 } || eval { require 'sys/syscall.ph'; 1 };
|
||||||
|
our $HAVE_KQUEUE = eval { require IO::KQueue; 1 };
|
||||||
|
|
||||||
|
# Explicitly define the poll constants, as either one set or the other won't be
|
||||||
|
# loaded. They're also badly implemented in IO::Epoll:
|
||||||
|
# The IO::Epoll module is buggy in that it doesn't export constants efficiently
|
||||||
|
# (at least as of 0.01), so doing constants ourselves saves 13% of the user CPU
|
||||||
|
# time
|
||||||
|
use constant EPOLLIN => 1;
|
||||||
|
use constant EPOLLOUT => 4;
|
||||||
|
use constant EPOLLERR => 8;
|
||||||
|
use constant EPOLLHUP => 16;
|
||||||
|
use constant EPOLL_CTL_ADD => 1;
|
||||||
|
use constant EPOLL_CTL_DEL => 2;
|
||||||
|
use constant EPOLL_CTL_MOD => 3;
|
||||||
|
|
||||||
|
use constant POLLIN => 1;
|
||||||
|
use constant POLLOUT => 4;
|
||||||
|
use constant POLLERR => 8;
|
||||||
|
use constant POLLHUP => 16;
|
||||||
|
use constant POLLNVAL => 32;
|
||||||
|
|
||||||
|
# keep track of active clients
|
||||||
|
our (
|
||||||
|
$HaveEpoll, # Flag -- is epoll available? initially undefined.
|
||||||
|
$HaveKQueue,
|
||||||
|
%DescriptorMap, # fd (num) -> Danga::Socket object
|
||||||
|
%PushBackSet, # fd (num) -> Danga::Socket (fds with pushed back read data)
|
||||||
|
$Epoll, # Global epoll fd (for epoll mode only)
|
||||||
|
$KQueue, # Global kqueue fd (for kqueue mode only)
|
||||||
|
@ToClose, # sockets to close when event loop is done
|
||||||
|
%OtherFds, # A hash of "other" (non-Danga::Socket) file
|
||||||
|
# descriptors for the event loop to track.
|
||||||
|
$PostLoopCallback, # subref to call at the end of each loop, if defined
|
||||||
|
%PLCMap, # fd (num) -> PostLoopCallback
|
||||||
|
@Timers, # timers
|
||||||
|
);
|
||||||
|
|
||||||
|
%OtherFds = ();
|
||||||
|
|
||||||
|
#####################################################################
|
||||||
|
### C L A S S M E T H O D S
|
||||||
|
#####################################################################
|
||||||
|
|
||||||
|
### (CLASS) METHOD: HaveEpoll()
|
||||||
|
### Returns a true value if this class will use IO::Epoll for async IO.
|
||||||
|
sub HaveEpoll { $HaveEpoll };
|
||||||
|
|
||||||
|
### (CLASS) METHOD: WatchedSockets()
|
||||||
|
### Returns the number of file descriptors which are registered with the global
|
||||||
|
### poll object.
|
||||||
|
sub WatchedSockets {
|
||||||
|
return scalar keys %DescriptorMap;
|
||||||
|
}
|
||||||
|
*watched_sockets = *WatchedSockets;
|
||||||
|
|
||||||
|
|
||||||
|
### (CLASS) METHOD: ToClose()
|
||||||
|
### Return the list of sockets that are awaiting close() at the end of the
|
||||||
|
### current event loop.
|
||||||
|
sub ToClose { return @ToClose; }
|
||||||
|
|
||||||
|
|
||||||
|
### (CLASS) METHOD: OtherFds( [%fdmap] )
|
||||||
|
### Get/set the hash of file descriptors that need processing in parallel with
|
||||||
|
### the registered Danga::Socket objects.
|
||||||
|
sub OtherFds {
|
||||||
|
my $class = shift;
|
||||||
|
if ( @_ ) { %OtherFds = @_ }
|
||||||
|
return wantarray ? %OtherFds : \%OtherFds;
|
||||||
|
}
|
||||||
|
|
||||||
|
sub AddTimer {
|
||||||
|
my $class = shift;
|
||||||
|
my ($secs, $coderef) = @_;
|
||||||
|
my $timeout = time + $secs;
|
||||||
|
|
||||||
|
if (!@Timers || ($timeout >= $Timers[-1][0])) {
|
||||||
|
push @Timers, [$timeout, $coderef];
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
# Now where do we insert...
|
||||||
|
for (my $i = 0; $i < @Timers; $i++) {
|
||||||
|
if ($Timers[$i][0] > $timeout) {
|
||||||
|
splice(@Timers, $i, 0, [$timeout, $coderef]);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
die "Shouldn't get here spank matt.";
|
||||||
|
}
|
||||||
|
|
||||||
|
### (CLASS) METHOD: DescriptorMap()
|
||||||
|
### Get the hash of Danga::Socket objects keyed by the file descriptor they are
|
||||||
|
### wrapping.
|
||||||
|
sub DescriptorMap {
|
||||||
|
return wantarray ? %DescriptorMap : \%DescriptorMap;
|
||||||
|
}
|
||||||
|
*descriptor_map = *DescriptorMap;
|
||||||
|
*get_sock_ref = *DescriptorMap;
|
||||||
|
|
||||||
|
sub init_poller
|
||||||
|
{
|
||||||
|
return if defined $HaveEpoll || $HaveKQueue;
|
||||||
|
|
||||||
|
if ($HAVE_KQUEUE) {
|
||||||
|
$KQueue = IO::KQueue->new();
|
||||||
|
$HaveKQueue = $KQueue >= 0;
|
||||||
|
if ($HaveKQueue) {
|
||||||
|
*EventLoop = *KQueueEventLoop;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
$Epoll = eval { epoll_create(1024); };
|
||||||
|
$HaveEpoll = $Epoll >= 0;
|
||||||
|
if ($HaveEpoll) {
|
||||||
|
*EventLoop = *EpollEventLoop;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
if (!$HaveEpoll && !$HaveKQueue) {
|
||||||
|
require IO::Poll;
|
||||||
|
*EventLoop = *PollEventLoop;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
### FUNCTION: EventLoop()
|
||||||
|
### Start processing IO events.
|
||||||
|
sub EventLoop {
|
||||||
|
my $class = shift;
|
||||||
|
|
||||||
|
init_poller();
|
||||||
|
|
||||||
|
if ($HaveEpoll) {
|
||||||
|
EpollEventLoop($class);
|
||||||
|
} else {
|
||||||
|
PollEventLoop($class);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
### The kqueue-based event loop. Gets installed as EventLoop if IO::KQueue works
|
||||||
|
### okay.
|
||||||
|
sub KQueueEventLoop {
|
||||||
|
my $class = shift;
|
||||||
|
|
||||||
|
foreach my $fd (keys %OtherFds) {
|
||||||
|
$KQueue->EV_SET($fd, IO::KQueue::EVFILT_READ(), IO::KQueue::EV_ADD());
|
||||||
|
}
|
||||||
|
|
||||||
|
while (1) {
|
||||||
|
my $now = time;
|
||||||
|
# Run expired timers
|
||||||
|
while (@Timers && $Timers[0][0] <= $now) {
|
||||||
|
my $to_run = shift(@Timers);
|
||||||
|
$to_run->[1]->($now);
|
||||||
|
}
|
||||||
|
|
||||||
|
# Get next timeout
|
||||||
|
my $timeout = @Timers ? ($Timers[0][0] - $now) : 1;
|
||||||
|
# print STDERR "kevent($timeout)\n";
|
||||||
|
my @ret = $KQueue->kevent($timeout * 1000);
|
||||||
|
|
||||||
|
foreach my $kev (@ret) {
|
||||||
|
my ($fd, $filter, $flags, $fflags) = @$kev;
|
||||||
|
|
||||||
|
my Danga::Socket $pob = $DescriptorMap{$fd};
|
||||||
|
|
||||||
|
# prioritise OtherFds first - likely to be accept() socks (?)
|
||||||
|
if (!$pob) {
|
||||||
|
if (my $code = $OtherFds{$fd}) {
|
||||||
|
$code->($filter);
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
print STDERR "kevent() returned fd $fd for which we have no mapping. removing.\n";
|
||||||
|
POSIX::close($fd); # close deletes the kevent entry
|
||||||
|
}
|
||||||
|
next;
|
||||||
|
}
|
||||||
|
|
||||||
|
DebugLevel >= 1 && $class->DebugMsg("Event: fd=%d (%s), flags=%d \@ %s\n",
|
||||||
|
$fd, ref($pob), $flags, time);
|
||||||
|
|
||||||
|
$pob->event_read if $filter == IO::KQueue::EVFILT_READ() && !$pob->{closed};
|
||||||
|
$pob->event_write if $filter == IO::KQueue::EVFILT_WRITE() && !$pob->{closed};
|
||||||
|
if ($flags == IO::KQueue::EV_EOF() && !$pob->{closed}) {
|
||||||
|
if ($fflags) {
|
||||||
|
$pob->event_err;
|
||||||
|
} else {
|
||||||
|
$pob->event_hup;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return unless PostEventLoop();
|
||||||
|
}
|
||||||
|
|
||||||
|
exit(0);
|
||||||
|
}
|
||||||
|
|
||||||
|
### The epoll-based event loop. Gets installed as EventLoop if IO::Epoll loads
|
||||||
|
### okay.
|
||||||
|
sub EpollEventLoop {
|
||||||
|
my $class = shift;
|
||||||
|
|
||||||
|
foreach my $fd ( keys %OtherFds ) {
|
||||||
|
epoll_ctl($Epoll, EPOLL_CTL_ADD, $fd, EPOLLIN);
|
||||||
|
}
|
||||||
|
|
||||||
|
while (1) {
|
||||||
|
my $now = time;
|
||||||
|
# Run expired timers
|
||||||
|
while (@Timers && $Timers[0][0] <= $now) {
|
||||||
|
my $to_run = shift(@Timers);
|
||||||
|
$to_run->[1]->($now);
|
||||||
|
}
|
||||||
|
|
||||||
|
# Get next timeout
|
||||||
|
my $timeout = @Timers ? ($Timers[0][0] - $now) : 1;
|
||||||
|
|
||||||
|
my @events;
|
||||||
|
my $i;
|
||||||
|
my $evcount = epoll_wait($Epoll, 1000, $timeout * 1000, \@events);
|
||||||
|
|
||||||
|
EVENT:
|
||||||
|
for ($i=0; $i<$evcount; $i++) {
|
||||||
|
my $ev = $events[$i];
|
||||||
|
|
||||||
|
# it's possible epoll_wait returned many events, including some at the end
|
||||||
|
# that ones in the front triggered unregister-interest actions. if we
|
||||||
|
# can't find the %sock entry, it's because we're no longer interested
|
||||||
|
# in that event.
|
||||||
|
my Danga::Socket $pob = $DescriptorMap{$ev->[0]};
|
||||||
|
my $code;
|
||||||
|
my $state = $ev->[1];
|
||||||
|
|
||||||
|
# if we didn't find a Perlbal::Socket subclass for that fd, try other
|
||||||
|
# pseudo-registered (above) fds.
|
||||||
|
if (! $pob) {
|
||||||
|
if (my $code = $OtherFds{$ev->[0]}) {
|
||||||
|
$code->($state);
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
my $fd = $ev->[0];
|
||||||
|
print STDERR "epoll() returned fd $fd w/ state $state for which we have no mapping. removing.\n";
|
||||||
|
POSIX::close($fd);
|
||||||
|
epoll_ctl($Epoll, EPOLL_CTL_DEL, $fd, 0);
|
||||||
|
}
|
||||||
|
next;
|
||||||
|
}
|
||||||
|
|
||||||
|
DebugLevel >= 1 && $class->DebugMsg("Event: fd=%d (%s), state=%d \@ %s\n",
|
||||||
|
$ev->[0], ref($pob), $ev->[1], time);
|
||||||
|
|
||||||
|
$pob->event_read if $state & EPOLLIN && ! $pob->{closed};
|
||||||
|
$pob->event_write if $state & EPOLLOUT && ! $pob->{closed};
|
||||||
|
$pob->event_err if $state & EPOLLERR && ! $pob->{closed};
|
||||||
|
$pob->event_hup if $state & EPOLLHUP && ! $pob->{closed};
|
||||||
|
}
|
||||||
|
|
||||||
|
return unless PostEventLoop();
|
||||||
|
}
|
||||||
|
exit 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
### The fallback IO::Poll-based event loop. Gets installed as EventLoop if
|
||||||
|
### IO::Epoll fails to load.
|
||||||
|
sub PollEventLoop {
|
||||||
|
my $class = shift;
|
||||||
|
|
||||||
|
my Danga::Socket $pob;
|
||||||
|
|
||||||
|
while (1) {
|
||||||
|
my $now = time;
|
||||||
|
# Run expired timers
|
||||||
|
while (@Timers && $Timers[0][0] <= $now) {
|
||||||
|
my $to_run = shift(@Timers);
|
||||||
|
$to_run->[1]->($now);
|
||||||
|
}
|
||||||
|
|
||||||
|
# Get next timeout
|
||||||
|
my $timeout = @Timers ? ($Timers[0][0] - $now) : 1;
|
||||||
|
|
||||||
|
# the following sets up @poll as a series of ($poll,$event_mask)
|
||||||
|
# items, then uses IO::Poll::_poll, implemented in XS, which
|
||||||
|
# modifies the array in place with the even elements being
|
||||||
|
# replaced with the event masks that occured.
|
||||||
|
my @poll;
|
||||||
|
foreach my $fd ( keys %OtherFds ) {
|
||||||
|
push @poll, $fd, POLLIN;
|
||||||
|
}
|
||||||
|
foreach my $fd ( keys %DescriptorMap ) {
|
||||||
|
my Danga::Socket $sock = $DescriptorMap{$fd};
|
||||||
|
push @poll, $fd, $sock->{event_watch};
|
||||||
|
}
|
||||||
|
return 0 unless @poll;
|
||||||
|
|
||||||
|
# print STDERR "Poll for $timeout secs\n";
|
||||||
|
my $count = IO::Poll::_poll($timeout * 1000, @poll);
|
||||||
|
|
||||||
|
# Fetch handles with read events
|
||||||
|
while (@poll) {
|
||||||
|
my ($fd, $state) = splice(@poll, 0, 2);
|
||||||
|
next unless $state;
|
||||||
|
|
||||||
|
$pob = $DescriptorMap{$fd};
|
||||||
|
|
||||||
|
if ( !$pob && (my $code = $OtherFds{$fd}) ) {
|
||||||
|
$code->($state);
|
||||||
|
next;
|
||||||
|
}
|
||||||
|
|
||||||
|
$pob->event_read if $state & POLLIN && ! $pob->{closed};
|
||||||
|
$pob->event_write if $state & POLLOUT && ! $pob->{closed};
|
||||||
|
$pob->event_err if $state & POLLERR && ! $pob->{closed};
|
||||||
|
$pob->event_hup if $state & POLLHUP && ! $pob->{closed};
|
||||||
|
}
|
||||||
|
|
||||||
|
return unless PostEventLoop();
|
||||||
|
}
|
||||||
|
|
||||||
|
exit 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
## PostEventLoop is called at the end of the event loop to process things
|
||||||
|
# like close() calls.
|
||||||
|
sub PostEventLoop {
|
||||||
|
# fire read events for objects with pushed-back read data
|
||||||
|
my $loop = 1;
|
||||||
|
while ($loop) {
|
||||||
|
$loop = 0;
|
||||||
|
foreach my $fd (keys %PushBackSet) {
|
||||||
|
my Danga::Socket $pob = $PushBackSet{$fd};
|
||||||
|
next unless (! $pob->{closed} &&
|
||||||
|
$pob->{event_watch} & POLLIN);
|
||||||
|
$loop = 1;
|
||||||
|
$pob->event_read;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
# now we can close sockets that wanted to close during our event processing.
|
||||||
|
# (we didn't want to close them during the loop, as we didn't want fd numbers
|
||||||
|
# being reused and confused during the event loop)
|
||||||
|
foreach my $f (@ToClose) {
|
||||||
|
close($f);
|
||||||
|
}
|
||||||
|
@ToClose = ();
|
||||||
|
|
||||||
|
# now we're at the very end, call per-connection callbacks if defined
|
||||||
|
my $ret = 1; # use $ret so's to not starve some FDs; return 0 if any PLCs return 0
|
||||||
|
for my $plc (values %PLCMap) {
|
||||||
|
$ret &&= $plc->(\%DescriptorMap, \%OtherFds);
|
||||||
|
}
|
||||||
|
|
||||||
|
# now we're at the very end, call global callback if defined
|
||||||
|
if (defined $PostLoopCallback) {
|
||||||
|
$ret &&= $PostLoopCallback->(\%DescriptorMap, \%OtherFds);
|
||||||
|
}
|
||||||
|
return $ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
### (CLASS) METHOD: DebugMsg( $format, @args )
|
||||||
|
### Print the debugging message specified by the C<sprintf>-style I<format> and
|
||||||
|
### I<args>
|
||||||
|
sub DebugMsg {
|
||||||
|
my ( $class, $fmt, @args ) = @_;
|
||||||
|
chomp $fmt;
|
||||||
|
printf STDERR ">>> $fmt\n", @args;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
### METHOD: new( $socket )
|
||||||
|
### Create a new Danga::Socket object for the given I<socket> which will react
|
||||||
|
### to events on it during the C<wait_loop>.
|
||||||
|
sub new {
|
||||||
|
my Danga::Socket $self = shift;
|
||||||
|
$self = fields::new($self) unless ref $self;
|
||||||
|
|
||||||
|
my $sock = shift;
|
||||||
|
|
||||||
|
$self->{sock} = $sock;
|
||||||
|
my $fd = fileno($sock);
|
||||||
|
$self->{fd} = $fd;
|
||||||
|
$self->{write_buf} = [];
|
||||||
|
$self->{write_buf_offset} = 0;
|
||||||
|
$self->{write_buf_size} = 0;
|
||||||
|
$self->{closed} = 0;
|
||||||
|
$self->{read_push_back} = [];
|
||||||
|
$self->{post_loop_callback} = undef;
|
||||||
|
|
||||||
|
$self->{event_watch} = POLLERR|POLLHUP|POLLNVAL;
|
||||||
|
|
||||||
|
init_poller();
|
||||||
|
|
||||||
|
if ($HaveEpoll) {
|
||||||
|
epoll_ctl($Epoll, EPOLL_CTL_ADD, $fd, $self->{event_watch})
|
||||||
|
and die "couldn't add epoll watch for $fd\n";
|
||||||
|
}
|
||||||
|
elsif ($HaveKQueue) {
|
||||||
|
# Add them to the queue but disabled for now
|
||||||
|
$KQueue->EV_SET($fd, IO::KQueue::EVFILT_READ(),
|
||||||
|
IO::KQueue::EV_ADD() | IO::KQueue::EV_DISABLE());
|
||||||
|
$KQueue->EV_SET($fd, IO::KQueue::EVFILT_WRITE(),
|
||||||
|
IO::KQueue::EV_ADD() | IO::KQueue::EV_DISABLE());
|
||||||
|
}
|
||||||
|
|
||||||
|
$DescriptorMap{$fd} = $self;
|
||||||
|
return $self;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
#####################################################################
|
||||||
|
### I N S T A N C E M E T H O D S
|
||||||
|
#####################################################################
|
||||||
|
|
||||||
|
### METHOD: tcp_cork( $boolean )
|
||||||
|
### Turn TCP_CORK on or off depending on the value of I<boolean>.
|
||||||
|
sub tcp_cork {
|
||||||
|
my Danga::Socket $self = shift;
|
||||||
|
my $val = shift;
|
||||||
|
|
||||||
|
# FIXME: Linux-specific.
|
||||||
|
setsockopt($self->{sock}, IPPROTO_TCP, TCP_CORK,
|
||||||
|
pack("l", $val ? 1 : 0)) || die "setsockopt: $!";
|
||||||
|
}
|
||||||
|
|
||||||
|
### METHOD: close( [$reason] )
|
||||||
|
### Close the socket. The I<reason> argument will be used in debugging messages.
|
||||||
|
sub close {
|
||||||
|
my Danga::Socket $self = shift;
|
||||||
|
my $reason = shift || "";
|
||||||
|
|
||||||
|
my $fd = $self->{fd};
|
||||||
|
my $sock = $self->{sock};
|
||||||
|
$self->{closed} = 1;
|
||||||
|
|
||||||
|
# we need to flush our write buffer, as there may
|
||||||
|
# be self-referential closures (sub { $client->close })
|
||||||
|
# preventing the object from being destroyed
|
||||||
|
$self->{write_buf} = [];
|
||||||
|
|
||||||
|
if (DebugLevel) {
|
||||||
|
my ($pkg, $filename, $line) = caller;
|
||||||
|
print STDERR "Closing \#$fd due to $pkg/$filename/$line ($reason)\n";
|
||||||
|
}
|
||||||
|
|
||||||
|
if ($HaveEpoll) {
|
||||||
|
if (epoll_ctl($Epoll, EPOLL_CTL_DEL, $fd, $self->{event_watch}) == 0) {
|
||||||
|
DebugLevel >= 1 && $self->debugmsg("Client %d disconnected.\n", $fd);
|
||||||
|
} else {
|
||||||
|
DebugLevel >= 1 && $self->debugmsg("poll->remove failed on fd %d\n", $fd);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
delete $PLCMap{$fd};
|
||||||
|
delete $DescriptorMap{$fd};
|
||||||
|
delete $PushBackSet{$fd};
|
||||||
|
|
||||||
|
# defer closing the actual socket until the event loop is done
|
||||||
|
# processing this round of events. (otherwise we might reuse fds)
|
||||||
|
push @ToClose, $sock;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
### METHOD: sock()
|
||||||
|
### Returns the underlying IO::Handle for the object.
|
||||||
|
sub sock {
|
||||||
|
my Danga::Socket $self = shift;
|
||||||
|
return $self->{sock};
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
### METHOD: write( $data )
|
||||||
|
### Write the specified data to the underlying handle. I<data> may be scalar,
|
||||||
|
### scalar ref, code ref (to run when there), or undef just to kick-start.
|
||||||
|
### Returns 1 if writes all went through, or 0 if there are writes in queue. If
|
||||||
|
### it returns 1, caller should stop waiting for 'writable' events)
|
||||||
|
sub write {
|
||||||
|
my Danga::Socket $self;
|
||||||
|
my $data;
|
||||||
|
($self, $data) = @_;
|
||||||
|
|
||||||
|
# nobody should be writing to closed sockets, but caller code can
|
||||||
|
# do two writes within an event, have the first fail and
|
||||||
|
# disconnect the other side (whose destructor then closes the
|
||||||
|
# calling object, but it's still in a method), and then the
|
||||||
|
# now-dead object does its second write. that is this case. we
|
||||||
|
# just lie and say it worked. it'll be dead soon and won't be
|
||||||
|
# hurt by this lie.
|
||||||
|
return 1 if $self->{closed};
|
||||||
|
|
||||||
|
my $bref;
|
||||||
|
|
||||||
|
# just queue data if there's already a wait
|
||||||
|
my $need_queue;
|
||||||
|
|
||||||
|
if (defined $data) {
|
||||||
|
$bref = ref $data ? $data : \$data;
|
||||||
|
if ($self->{write_buf_size}) {
|
||||||
|
push @{$self->{write_buf}}, $bref;
|
||||||
|
$self->{write_buf_size} += ref $bref eq "SCALAR" ? length($$bref) : 1;
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
# this flag says we're bypassing the queue system, knowing we're the
|
||||||
|
# only outstanding write, and hoping we don't ever need to use it.
|
||||||
|
# if so later, though, we'll need to queue
|
||||||
|
$need_queue = 1;
|
||||||
|
}
|
||||||
|
|
||||||
|
WRITE:
|
||||||
|
while (1) {
|
||||||
|
return 1 unless $bref ||= $self->{write_buf}[0];
|
||||||
|
|
||||||
|
my $len;
|
||||||
|
eval {
|
||||||
|
$len = length($$bref); # this will die if $bref is a code ref, caught below
|
||||||
|
};
|
||||||
|
if ($@) {
|
||||||
|
if (ref $bref eq "CODE") {
|
||||||
|
unless ($need_queue) {
|
||||||
|
$self->{write_buf_size}--; # code refs are worth 1
|
||||||
|
shift @{$self->{write_buf}};
|
||||||
|
}
|
||||||
|
$bref->();
|
||||||
|
undef $bref;
|
||||||
|
next WRITE;
|
||||||
|
}
|
||||||
|
die "Write error: $@ <$bref>";
|
||||||
|
}
|
||||||
|
|
||||||
|
my $to_write = $len - $self->{write_buf_offset};
|
||||||
|
my $written = syswrite($self->{sock}, $$bref, $to_write, $self->{write_buf_offset});
|
||||||
|
|
||||||
|
if (! defined $written) {
|
||||||
|
if ($! == EPIPE) {
|
||||||
|
return $self->close("EPIPE");
|
||||||
|
} elsif ($! == EAGAIN) {
|
||||||
|
# since connection has stuff to write, it should now be
|
||||||
|
# interested in pending writes:
|
||||||
|
if ($need_queue) {
|
||||||
|
push @{$self->{write_buf}}, $bref;
|
||||||
|
$self->{write_buf_size} += $len;
|
||||||
|
}
|
||||||
|
$self->watch_write(1);
|
||||||
|
return 0;
|
||||||
|
} elsif ($! == ECONNRESET) {
|
||||||
|
return $self->close("ECONNRESET");
|
||||||
|
}
|
||||||
|
|
||||||
|
DebugLevel >= 1 && $self->debugmsg("Closing connection ($self) due to write error: $!\n");
|
||||||
|
|
||||||
|
return $self->close("write_error");
|
||||||
|
} elsif ($written != $to_write) {
|
||||||
|
DebugLevel >= 2 && $self->debugmsg("Wrote PARTIAL %d bytes to %d",
|
||||||
|
$written, $self->{fd});
|
||||||
|
if ($need_queue) {
|
||||||
|
push @{$self->{write_buf}}, $bref;
|
||||||
|
$self->{write_buf_size} += $len;
|
||||||
|
}
|
||||||
|
# since connection has stuff to write, it should now be
|
||||||
|
# interested in pending writes:
|
||||||
|
$self->{write_buf_offset} += $written;
|
||||||
|
$self->{write_buf_size} -= $written;
|
||||||
|
$self->watch_write(1);
|
||||||
|
return 0;
|
||||||
|
} elsif ($written == $to_write) {
|
||||||
|
DebugLevel >= 2 && $self->debugmsg("Wrote ALL %d bytes to %d (nq=%d)",
|
||||||
|
$written, $self->{fd}, $need_queue);
|
||||||
|
$self->{write_buf_offset} = 0;
|
||||||
|
|
||||||
|
# this was our only write, so we can return immediately
|
||||||
|
# since we avoided incrementing the buffer size or
|
||||||
|
# putting it in the buffer. we also know there
|
||||||
|
# can't be anything else to write.
|
||||||
|
return 1 if $need_queue;
|
||||||
|
|
||||||
|
$self->{write_buf_size} -= $written;
|
||||||
|
shift @{$self->{write_buf}};
|
||||||
|
undef $bref;
|
||||||
|
next WRITE;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
### METHOD: push_back_read( $buf )
|
||||||
|
### Push back I<buf> (a scalar or scalarref) into the read stream
|
||||||
|
sub push_back_read {
|
||||||
|
my Danga::Socket $self = shift;
|
||||||
|
my $buf = shift;
|
||||||
|
push @{$self->{read_push_back}}, ref $buf ? $buf : \$buf;
|
||||||
|
$PushBackSet{$self->{fd}} = $self;
|
||||||
|
}
|
||||||
|
|
||||||
|
### METHOD: shift_back_read( $buf )
|
||||||
|
### Shift back I<buf> (a scalar or scalarref) into the read stream
|
||||||
|
### Use this instead of push_back_read() when you need to unread
|
||||||
|
### something you just read.
|
||||||
|
sub shift_back_read {
|
||||||
|
my Danga::Socket $self = shift;
|
||||||
|
my $buf = shift;
|
||||||
|
unshift @{$self->{read_push_back}}, ref $buf ? $buf : \$buf;
|
||||||
|
$PushBackSet{$self->{fd}} = $self;
|
||||||
|
}
|
||||||
|
|
||||||
|
### METHOD: read( $bytecount )
|
||||||
|
### Read at most I<bytecount> bytes from the underlying handle; returns scalar
|
||||||
|
### ref on read, or undef on connection closed.
|
||||||
|
sub read {
|
||||||
|
my Danga::Socket $self = shift;
|
||||||
|
my $bytes = shift;
|
||||||
|
my $buf;
|
||||||
|
my $sock = $self->{sock};
|
||||||
|
|
||||||
|
if (@{$self->{read_push_back}}) {
|
||||||
|
$buf = shift @{$self->{read_push_back}};
|
||||||
|
my $len = length($$buf);
|
||||||
|
if ($len <= $buf) {
|
||||||
|
unless (@{$self->{read_push_back}}) {
|
||||||
|
delete $PushBackSet{$self->{fd}};
|
||||||
|
}
|
||||||
|
return $buf;
|
||||||
|
} else {
|
||||||
|
# if the pushed back read is too big, we have to split it
|
||||||
|
my $overflow = substr($$buf, $bytes);
|
||||||
|
$buf = substr($$buf, 0, $bytes);
|
||||||
|
unshift @{$self->{read_push_back}}, \$overflow,
|
||||||
|
return \$buf;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
my $res = sysread($sock, $buf, $bytes, 0);
|
||||||
|
DebugLevel >= 2 && $self->debugmsg("sysread = %d; \$! = %d", $res, $!);
|
||||||
|
|
||||||
|
if (! $res && $! != EWOULDBLOCK) {
|
||||||
|
# catches 0=conn closed or undef=error
|
||||||
|
DebugLevel >= 2 && $self->debugmsg("Fd \#%d read hit the end of the road.", $self->{fd});
|
||||||
|
return undef;
|
||||||
|
}
|
||||||
|
|
||||||
|
return \$buf;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
### (VIRTUAL) METHOD: event_read()
|
||||||
|
### Readable event handler. Concrete deriviatives of Danga::Socket should
|
||||||
|
### provide an implementation of this. The default implementation will die if
|
||||||
|
### called.
|
||||||
|
sub event_read { die "Base class event_read called for $_[0]\n"; }
|
||||||
|
|
||||||
|
|
||||||
|
### (VIRTUAL) METHOD: event_err()
|
||||||
|
### Error event handler. Concrete deriviatives of Danga::Socket should
|
||||||
|
### provide an implementation of this. The default implementation will die if
|
||||||
|
### called.
|
||||||
|
sub event_err { die "Base class event_err called for $_[0]\n"; }
|
||||||
|
|
||||||
|
|
||||||
|
### (VIRTUAL) METHOD: event_hup()
|
||||||
|
### 'Hangup' event handler. Concrete deriviatives of Danga::Socket should
|
||||||
|
### provide an implementation of this. The default implementation will die if
|
||||||
|
### called.
|
||||||
|
sub event_hup { die "Base class event_hup called for $_[0]\n"; }
|
||||||
|
|
||||||
|
|
||||||
|
### METHOD: event_write()
|
||||||
|
### Writable event handler. Concrete deriviatives of Danga::Socket may wish to
|
||||||
|
### provide an implementation of this. The default implementation calls
|
||||||
|
### C<write()> with an C<undef>.
|
||||||
|
sub event_write {
|
||||||
|
my $self = shift;
|
||||||
|
$self->write(undef);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
### METHOD: watch_read( $boolean )
|
||||||
|
### Turn 'readable' event notification on or off.
|
||||||
|
sub watch_read {
|
||||||
|
my Danga::Socket $self = shift;
|
||||||
|
return if $self->{closed};
|
||||||
|
|
||||||
|
my $val = shift;
|
||||||
|
my $event = $self->{event_watch};
|
||||||
|
|
||||||
|
$event &= ~POLLIN if ! $val;
|
||||||
|
$event |= POLLIN if $val;
|
||||||
|
|
||||||
|
# If it changed, set it
|
||||||
|
if ($event != $self->{event_watch}) {
|
||||||
|
if ($HaveKQueue) {
|
||||||
|
$KQueue->EV_SET($self->{fd}, IO::KQueue::EVFILT_READ(),
|
||||||
|
$val ? IO::KQueue::EV_ENABLE() : IO::KQueue::EV_DISABLE());
|
||||||
|
}
|
||||||
|
elsif ($HaveEpoll) {
|
||||||
|
epoll_ctl($Epoll, EPOLL_CTL_MOD, $self->{fd}, $event)
|
||||||
|
and print STDERR "couldn't modify epoll settings for $self->{fd} " .
|
||||||
|
"($self) from $self->{event_watch} -> $event\n";
|
||||||
|
}
|
||||||
|
$self->{event_watch} = $event;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
### METHOD: watch_read( $boolean )
|
||||||
|
### Turn 'writable' event notification on or off.
|
||||||
|
sub watch_write {
|
||||||
|
my Danga::Socket $self = shift;
|
||||||
|
return if $self->{closed};
|
||||||
|
|
||||||
|
my $val = shift;
|
||||||
|
my $event = $self->{event_watch};
|
||||||
|
|
||||||
|
$event &= ~POLLOUT if ! $val;
|
||||||
|
$event |= POLLOUT if $val;
|
||||||
|
|
||||||
|
# If it changed, set it
|
||||||
|
if ($event != $self->{event_watch}) {
|
||||||
|
if ($HaveKQueue) {
|
||||||
|
$KQueue->EV_SET($self->{fd}, IO::KQueue::EVFILT_WRITE(),
|
||||||
|
$val ? IO::KQueue::EV_ENABLE() : IO::KQueue::EV_DISABLE());
|
||||||
|
}
|
||||||
|
elsif ($HaveEpoll) {
|
||||||
|
epoll_ctl($Epoll, EPOLL_CTL_MOD, $self->{fd}, $event)
|
||||||
|
and print STDERR "couldn't modify epoll settings for $self->{fd} " .
|
||||||
|
"($self) from $self->{event_watch} -> $event\n";
|
||||||
|
}
|
||||||
|
$self->{event_watch} = $event;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
### METHOD: debugmsg( $format, @args )
|
||||||
|
### Print the debugging message specified by the C<sprintf>-style I<format> and
|
||||||
|
### I<args> if the object's C<debug_level> is greater than or equal to the given
|
||||||
|
### I<level>.
|
||||||
|
sub debugmsg {
|
||||||
|
my ( $self, $fmt, @args ) = @_;
|
||||||
|
confess "Not an object" unless ref $self;
|
||||||
|
|
||||||
|
chomp $fmt;
|
||||||
|
printf STDERR ">>> $fmt\n", @args;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
### METHOD: peer_ip_string()
|
||||||
|
### Returns the string describing the peer's IP
|
||||||
|
sub peer_ip_string {
|
||||||
|
my Danga::Socket $self = shift;
|
||||||
|
return $self->{peer_ip} if defined $self->{peer_ip};
|
||||||
|
my $pn = getpeername($self->{sock}) or return undef;
|
||||||
|
my ($port, $iaddr) = Socket::sockaddr_in($pn);
|
||||||
|
my $r = Socket::inet_ntoa($iaddr);
|
||||||
|
$self->{peer_ip} = $r;
|
||||||
|
return $r;
|
||||||
|
}
|
||||||
|
|
||||||
|
### METHOD: peer_addr_string()
|
||||||
|
### Returns the string describing the peer for the socket which underlies this
|
||||||
|
### object in form "ip:port"
|
||||||
|
sub peer_addr_string {
|
||||||
|
my Danga::Socket $self = shift;
|
||||||
|
my $pn = getpeername($self->{sock}) or return undef;
|
||||||
|
my ($port, $iaddr) = Socket::sockaddr_in($pn);
|
||||||
|
return Socket::inet_ntoa($iaddr) . ":$port";
|
||||||
|
}
|
||||||
|
|
||||||
|
### METHOD: as_string()
|
||||||
|
### Returns a string describing this socket.
|
||||||
|
sub as_string {
|
||||||
|
my Danga::Socket $self = shift;
|
||||||
|
my $ret = ref($self) . ": " . ($self->{closed} ? "closed" : "open");
|
||||||
|
my $peer = $self->peer_addr_string;
|
||||||
|
if ($peer) {
|
||||||
|
$ret .= " to " . $self->peer_addr_string;
|
||||||
|
}
|
||||||
|
return $ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
### CLASS METHOD: SetPostLoopCallback
|
||||||
|
### Sets post loop callback function. Pass a subref and it will be
|
||||||
|
### called every time the event loop finishes. Return 1 from the sub
|
||||||
|
### to make the loop continue, else it will exit. The function will
|
||||||
|
### be passed two parameters: \%DescriptorMap, \%OtherFds.
|
||||||
|
sub SetPostLoopCallback {
|
||||||
|
my ($class, $ref) = @_;
|
||||||
|
if(ref $class) {
|
||||||
|
my Danga::Socket $self = $class;
|
||||||
|
if( defined $ref && ref $ref eq 'CODE' ) {
|
||||||
|
$PLCMap{$self->{fd}} = $ref;
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
delete $PLCMap{$self->{fd}};
|
||||||
|
}
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
$PostLoopCallback = (defined $ref && ref $ref eq 'CODE') ? $ref : undef;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
sub DESTROY {
|
||||||
|
my Danga::Socket $self = shift;
|
||||||
|
$self->close() if !$self->{closed};
|
||||||
|
}
|
||||||
|
|
||||||
|
#####################################################################
|
||||||
|
### U T I L I T Y F U N C T I O N S
|
||||||
|
#####################################################################
|
||||||
|
|
||||||
|
our $SYS_epoll_create = eval { &SYS_epoll_create } || 254; # linux-ix86 default
|
||||||
|
|
||||||
|
# epoll_create wrapper
|
||||||
|
# ARGS: (size)
|
||||||
|
sub epoll_create {
|
||||||
|
my $epfd = eval { syscall($SYS_epoll_create, $_[0]) };
|
||||||
|
return -1 if $@;
|
||||||
|
return $epfd;
|
||||||
|
}
|
||||||
|
|
||||||
|
# epoll_ctl wrapper
|
||||||
|
# ARGS: (epfd, op, fd, events)
|
||||||
|
our $SYS_epoll_ctl = eval { &SYS_epoll_ctl } || 255; # linux-ix86 default
|
||||||
|
sub epoll_ctl {
|
||||||
|
syscall($SYS_epoll_ctl, $_[0]+0, $_[1]+0, $_[2]+0, pack("LLL", $_[3], $_[2]));
|
||||||
|
}
|
||||||
|
|
||||||
|
# epoll_wait wrapper
|
||||||
|
# ARGS: (epfd, maxevents, timeout, arrayref)
|
||||||
|
# arrayref: values modified to be [$fd, $event]
|
||||||
|
our $epoll_wait_events;
|
||||||
|
our $epoll_wait_size = 0;
|
||||||
|
our $SYS_epoll_wait = eval { &SYS_epoll_wait } || 256; # linux-ix86 default
|
||||||
|
sub epoll_wait {
|
||||||
|
# resize our static buffer if requested size is bigger than we've ever done
|
||||||
|
if ($_[1] > $epoll_wait_size) {
|
||||||
|
$epoll_wait_size = $_[1];
|
||||||
|
$epoll_wait_events = pack("LLL") x $epoll_wait_size;
|
||||||
|
}
|
||||||
|
my $ct = syscall($SYS_epoll_wait, $_[0]+0, $epoll_wait_events, $_[1]+0, $_[2]+0);
|
||||||
|
for ($_ = 0; $_ < $ct; $_++) {
|
||||||
|
@{$_[3]->[$_]}[1,0] = unpack("LL", substr($epoll_wait_events, 12*$_, 8));
|
||||||
|
}
|
||||||
|
return $ct;
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
1;
|
||||||
|
|
||||||
|
|
||||||
|
# Local Variables:
|
||||||
|
# mode: perl
|
||||||
|
# c-basic-indent: 4
|
||||||
|
# indent-tabs-mode: nil
|
||||||
|
# End:
|
||||||
62
lib/Danga/TimeoutSocket.pm
Normal file
62
lib/Danga/TimeoutSocket.pm
Normal file
@ -0,0 +1,62 @@
|
|||||||
|
# $Id: TimeoutSocket.pm,v 1.2 2005/02/02 20:44:35 msergeant Exp $
|
||||||
|
|
||||||
|
package Danga::TimeoutSocket;
|
||||||
|
|
||||||
|
use base 'Danga::Socket';
|
||||||
|
use fields qw(alive_time create_time);
|
||||||
|
|
||||||
|
our $last_cleanup = 0;
|
||||||
|
|
||||||
|
Danga::Socket->AddTimer(15, \&_do_cleanup);
|
||||||
|
|
||||||
|
sub new {
|
||||||
|
my Danga::TimeoutSocket $self = shift;
|
||||||
|
my $sock = shift;
|
||||||
|
$self = fields::new($self) unless ref($self);
|
||||||
|
$self->SUPER::new($sock);
|
||||||
|
|
||||||
|
my $now = time;
|
||||||
|
$self->{alive_time} = $self->{create_time} = $now;
|
||||||
|
|
||||||
|
return $self;
|
||||||
|
}
|
||||||
|
|
||||||
|
# overload these in a subclass
|
||||||
|
sub max_idle_time { 0 }
|
||||||
|
sub max_connect_time { 0 }
|
||||||
|
|
||||||
|
sub _do_cleanup {
|
||||||
|
my $now = time;
|
||||||
|
|
||||||
|
Danga::Socket->AddTimer(15, \&_do_cleanup);
|
||||||
|
|
||||||
|
my $sf = __PACKAGE__->get_sock_ref;
|
||||||
|
|
||||||
|
my %max_age; # classname -> max age (0 means forever)
|
||||||
|
my %max_connect; # classname -> max connect time
|
||||||
|
my @to_close;
|
||||||
|
while (my $k = each %$sf) {
|
||||||
|
my Danga::TimeoutSocket $v = $sf->{$k};
|
||||||
|
my $ref = ref $v;
|
||||||
|
next unless $v->isa('Danga::TimeoutSocket');
|
||||||
|
unless (defined $max_age{$ref}) {
|
||||||
|
$max_age{$ref} = $ref->max_idle_time || 0;
|
||||||
|
$max_connect{$ref} = $ref->max_connect_time || 0;
|
||||||
|
}
|
||||||
|
if (my $t = $max_connect{$ref}) {
|
||||||
|
if ($v->{create_time} < $now - $t) {
|
||||||
|
push @to_close, $v;
|
||||||
|
next;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if (my $t = $max_age{$ref}) {
|
||||||
|
if ($v->{alive_time} < $now - $t) {
|
||||||
|
push @to_close, $v;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
$_->close("Timeout") foreach @to_close;
|
||||||
|
}
|
||||||
|
|
||||||
|
1;
|
||||||
Loading…
Reference in New Issue
Block a user