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# Copyright (C) all contributors <meta@public-inbox.org>
# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
# IO::Socket::SSL support code
package PublicInbox::TLS;
use strict;
use IO::Socket::SSL;
use PublicInbox::Syscall qw(EPOLLIN EPOLLOUT);
use Carp qw(carp croak);
sub err () { $SSL_ERROR }
# returns the EPOLL event bit which matches the existing SSL error
sub epollbit () {
return EPOLLIN if $SSL_ERROR == SSL_WANT_READ;
return EPOLLOUT if $SSL_ERROR == SSL_WANT_WRITE;
carp "unexpected SSL error: $SSL_ERROR";
undef;
}
sub _ctx_new ($) {
my ($tlsd) = @_;
my $ctx = IO::Socket::SSL::SSL_Context->new(
@{$tlsd->{ssl_ctx_opt}}, SSL_server => 1) or
croak "SSL_Context->new: $SSL_ERROR";
# save ~34K per idle connection (cf. SSL_CTX_set_mode(3ssl))
# RSS goes from 346MB to 171MB with 10K idle NNTPS clients on amd64
# cf. https://rt.cpan.org/Ticket/Display.html?id=129463
my $mode = eval { Net::SSLeay::MODE_RELEASE_BUFFERS() };
if ($mode && $ctx->{context}) {
eval { Net::SSLeay::CTX_set_mode($ctx->{context}, $mode) };
warn "W: $@ (setting SSL_MODE_RELEASE_BUFFERS)\n" if $@;
}
$ctx;
}
sub start {
my ($io, $tlsd) = @_;
IO::Socket::SSL->start_SSL($io, SSL_server => 1,
SSL_reuse_ctx => ($tlsd->{ssl_ctx} //= _ctx_new($tlsd)),
SSL_startHandshake => 0);
}
1;
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