1 # Copyright (C) 2015-2018 all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
4 # Used by -nntpd for listen sockets
5 package PublicInbox::Listener;
8 use base 'PublicInbox::DS';
9 use Socket qw(SOL_SOCKET SO_KEEPALIVE IPPROTO_TCP TCP_NODELAY);
10 use fields qw(post_accept);
12 use PublicInbox::Syscall qw(EPOLLIN EPOLLEXCLUSIVE EPOLLET);
15 my ($class, $s, $cb) = @_;
16 setsockopt($s, SOL_SOCKET, SO_KEEPALIVE, 1);
17 setsockopt($s, IPPROTO_TCP, TCP_NODELAY, 1); # ignore errors on non-TCP
19 my $self = fields::new($class);
20 $self->SUPER::new($s, EPOLLIN|EPOLLET|EPOLLEXCLUSIVE);
21 $self->{post_accept} = $cb;
27 my $sock = $self->{sock} or return;
29 # no loop here, we want to fairly distribute clients
30 # between multiple processes sharing the same socket
31 # XXX our event loop needs better granularity for
32 # a single accept() here to be, umm..., acceptable
33 # on high-traffic sites.
34 if (my $addr = accept(my $c, $sock)) {
35 IO::Handle::blocking($c, 0); # no accept4 :<
36 $self->{post_accept}->($c, $addr, $sock);