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an "archives first" approach to mailing lists
blob f6a5da694041bfb89656eb43b3ecafc468c234ec 1207 bytes (raw)
$ git show p516-leak:lib/PublicInbox/Listener.pm	# shows this blob on the CLI

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# Copyright (C) 2015-2019 all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
#
# Used by -nntpd for listen sockets
package PublicInbox::Listener;
use strict;
use warnings;
use base 'PublicInbox::DS';
use Socket qw(SOL_SOCKET SO_KEEPALIVE IPPROTO_TCP TCP_NODELAY);
use fields qw(post_accept);
require IO::Handle;
use PublicInbox::Syscall qw(EPOLLIN EPOLLEXCLUSIVE EPOLLET);

sub new ($$$) {
	my ($class, $s, $cb) = @_;
	setsockopt($s, SOL_SOCKET, SO_KEEPALIVE, 1);
	setsockopt($s, IPPROTO_TCP, TCP_NODELAY, 1); # ignore errors on non-TCP
	listen($s, 1024);
	my $self = fields::new($class);
	$self->SUPER::new($s, EPOLLIN|EPOLLET|EPOLLEXCLUSIVE);
	$self->{post_accept} = $cb;
	$self
}

sub event_step {
	my ($self) = @_;
	my $sock = $self->{sock} or return;

	# no loop here, we want to fairly distribute clients
	# between multiple processes sharing the same socket
	# XXX our event loop needs better granularity for
	# a single accept() here to be, umm..., acceptable
	# on high-traffic sites.
	if (my $addr = accept(my $c, $sock)) {
		IO::Handle::blocking($c, 0); # no accept4 :<
		$self->{post_accept}->($c, $addr, $sock);
		$self->requeue;
	}
}

1;

git clone https://public-inbox.org/public-inbox.git
git clone http://7fh6tueqddpjyxjmgtdiueylzoqt6pt7hec3pukyptlmohoowvhde4yd.onion/public-inbox.git