1 # Copyright (C) 2015-2019 all contributors <meta@public-inbox.org>
2 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
4 # Each instance of this represents a NNTP client socket
5 package PublicInbox::NNTP;
8 use base qw(PublicInbox::DS);
9 use fields qw(nntpd article rbuf ng);
10 use PublicInbox::Search;
11 use PublicInbox::Msgmap;
12 use PublicInbox::MID qw(mid_escape);
14 require PublicInbox::EvCleanup;
16 use POSIX qw(strftime);
17 PublicInbox::DS->import(qw(now msg_more));
18 use Digest::SHA qw(sha1_hex);
19 use Time::Local qw(timegm timelocal);
21 r501 => '501 command syntax error',
22 r221 => '221 Header follows',
23 r224 => '224 Overview information follows (multi-line)',
24 r225 => '225 Headers follow (multi-line)',
25 r430 => '430 No article with that message-id',
27 use PublicInbox::Syscall qw(EPOLLOUT EPOLLONESHOT);
30 my @OVERVIEW = qw(Subject From Date Message-ID References Xref);
31 my $OVERVIEW_FMT = join(":\r\n", @OVERVIEW, qw(Bytes Lines)) . ":\r\n";
32 my $LIST_HEADERS = join("\r\n", @OVERVIEW,
33 qw(:bytes :lines Xref To Cc)) . "\r\n";
35 # disable commands with easy DoS potential:
36 my %DISABLED; # = map { $_ => 1 } qw(xover list_overview_fmt newnews xhdr);
38 my $EXPMAP; # fd -> [ idle_time, $self ]
40 our $EXPTIME = 180; # 3 minutes
48 event_step($_) for @$q;
53 $nextt ||= PublicInbox::EvCleanup::asap(*next_tick);
56 sub update_idle_time ($) {
58 my $sock = $self->{sock} or return;
59 $EXPMAP->{fileno($sock)} = [ now(), $self ];
65 my $old = $now - $exp;
69 while (my ($fd, $v) = each %$EXPMAP) {
70 my ($idle_time, $nntp) = @$v;
71 if ($idle_time < $old) {
85 $expt = PublicInbox::EvCleanup::later(*expire_old);
88 # noop to kick outselves out of the loop ASAP so descriptors
90 PublicInbox::EvCleanup::asap(sub {}) if $closed;
94 sub greet ($) { $_[0]->write($_[0]->{nntpd}->{greet}) };
97 my ($class, $sock, $nntpd) = @_;
98 my $self = fields::new($class);
99 my $ev = EPOLLOUT | EPOLLONESHOT;
101 if (ref($sock) eq 'IO::Socket::SSL' && !$sock->accept_SSL) {
102 $ev = PublicInbox::TLS::epollbit() or return CORE::close($sock);
104 $wbuf->[0] = \&PublicInbox::DS::accept_tls_step;
106 $self->SUPER::new($sock, $ev);
107 $self->{nntpd} = $nntpd;
108 push @$wbuf, \&greet;
109 $self->{wbuf} = $wbuf;
110 update_idle_time($self);
111 $expt ||= PublicInbox::EvCleanup::later(*expire_old);
116 my ($cb, $argc) = @_;
117 my $tot = prototype $cb;
118 my ($nreq, undef) = split(';', $tot);
119 $nreq = ($nreq =~ tr/$//) - 1;
120 $tot = ($tot =~ tr/$//) - 1;
121 ($argc <= $tot && $argc >= $nreq);
124 # returns 1 if we can continue, 0 if not due to buffered writes or disconnect
125 sub process_line ($$) {
127 my ($req, @args) = split(/[ \t]/, $l);
128 return 1 unless defined($req); # skip blank line
132 $req = $DISABLED{$req} ? undef : *{'cmd_'.$req}{CODE};
134 return res($self, '500 command not recognized') unless $req;
135 return res($self, r501) unless args_ok($req, scalar @args);
137 my $res = eval { $req->($self, @args) };
139 if ($err && $self->{sock}) {
142 err($self, 'error from: %s (%s)', $l, $err);
143 $res = '503 program fault - command not performed';
145 return 0 unless defined $res;
150 my ($self, $arg) = @_;
152 return r501 unless $arg eq 'READER';
153 '201 Posting prohibited';
156 sub cmd_slave ($) { '202 slave status noted' }
158 sub cmd_xgtitle ($;$) {
159 my ($self, $wildmat) = @_;
160 more($self, '282 list of groups and descriptions follows');
161 list_newsgroups($self, $wildmat);
165 sub list_overview_fmt ($) {
167 msg_more($self, $OVERVIEW_FMT);
170 sub list_headers ($;$) {
172 msg_more($self, $LIST_HEADERS);
175 sub list_active ($;$) {
176 my ($self, $wildmat) = @_;
177 wildmat2re($wildmat);
178 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
179 $ng->{newsgroup} =~ $wildmat or next;
180 group_line($self, $ng);
184 sub list_active_times ($;$) {
185 my ($self, $wildmat) = @_;
186 wildmat2re($wildmat);
187 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
188 $ng->{newsgroup} =~ $wildmat or next;
189 my $c = eval { $ng->mm->created_at } || time;
190 more($self, "$ng->{newsgroup} $c $ng->{-primary_address}");
194 sub list_newsgroups ($;$) {
195 my ($self, $wildmat) = @_;
196 wildmat2re($wildmat);
197 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
198 $ng->{newsgroup} =~ $wildmat or next;
199 my $d = $ng->description;
200 more($self, "$ng->{newsgroup} $d");
204 # LIST SUBSCRIPTIONS, DISTRIB.PATS are not supported
205 sub cmd_list ($;$$) {
206 my ($self, @args) = @_;
208 my $arg = shift @args;
209 $arg =~ tr/A-Z./a-z_/;
211 return r501 if $DISABLED{$arg};
217 return r501 unless $arg && args_ok($arg, scalar @args);
218 more($self, '215 information follows');
219 $arg->($self, @args);
221 more($self, '215 list of newsgroups follows');
222 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
223 group_line($self, $ng);
229 sub cmd_listgroup ($;$) {
230 my ($self, $group) = @_;
231 if (defined $group) {
232 my $res = cmd_group($self, $group);
233 return $res if ($res !~ /\A211 /);
237 $self->{ng} or return '412 no newsgroup selected';
239 long_response($self, sub {
240 my $ary = $self->{ng}->mm->ids_after(\$n);
241 scalar @$ary or return;
242 more($self, join("\r\n", @$ary));
247 sub parse_time ($$;$) {
248 my ($date, $time, $gmt) = @_;
249 my ($hh, $mm, $ss) = unpack('A2A2A2', $time);
251 $gmt =~ /\A(?:UTC|GMT)\z/i or die "GM invalid: $gmt";
254 my @now = $gmt ? gmtime : localtime;
255 my ($YYYY, $MM, $DD);
256 if (bytes::length($date) == 8) { # RFC 3977 allows YYYYMMDD
257 ($YYYY, $MM, $DD) = unpack('A4A2A2', $date);
258 } else { # legacy clients send YYMMDD
259 ($YYYY, $MM, $DD) = unpack('A2A2A2', $date);
260 my $cur_year = $now[5] + 1900;
261 if ($YYYY > $cur_year) {
262 $YYYY += int($cur_year / 1000) * 1000 - 100;
266 timegm($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
268 timelocal($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
272 sub group_line ($$) {
273 my ($self, $ng) = @_;
274 my ($min, $max) = $ng->mm->minmax;
275 more($self, "$ng->{newsgroup} $max $min n") if defined $min && defined $max;
278 sub cmd_newgroups ($$$;$$) {
279 my ($self, $date, $time, $gmt, $dists) = @_;
280 my $ts = eval { parse_time($date, $time, $gmt) };
284 more($self, '231 list of new newsgroups follows');
285 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
286 my $c = eval { $ng->mm->created_at } || 0;
287 next unless $c > $ts;
288 group_line($self, $ng);
293 sub wildmat2re (;$) {
294 return $_[0] = qr/.*/ if (!defined $_[0] || $_[0] eq '*');
299 $tmp =~ s#(?<!\\)\[(.+)(?<!\\)\]#
301 my $key = sha1_hex($orig . $salt);
302 $orig =~ s/([^\w\-])+/\Q$1/g;
306 my %map = ('*' => '.*', '?' => '.' );
307 $tmp =~ s#(?<!\\)([^\w\\])#$map{$1} || "\Q$1"#ge;
309 $tmp =~ s#([a-f0-9]{40})#
310 my $orig = $keep{$1};
311 defined $orig ? $orig : $1;
314 $_[0] = qr/\A$tmp\z/;
318 return $_[0] = qr/\A\z/ unless defined $_[0];
319 my %map = ('*' => '.*', ',' => '|');
320 $_[0] =~ s!(.)!$map{$1} || "\Q$1"!ge;
321 $_[0] = qr/\A(?:$_[0])\z/;
324 sub cmd_newnews ($$$$;$$) {
325 my ($self, $newsgroups, $date, $time, $gmt, $dists) = @_;
326 my $ts = eval { parse_time($date, $time, $gmt) };
328 more($self, '230 list of new articles by message-id follows');
329 my ($keep, $skip) = split('!', $newsgroups, 2);
333 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
334 $ng->{newsgroup} =~ $keep or next;
335 $ng->{newsgroup} =~ $skip and next;
336 my $over = $ng->over or next;
339 return '.' unless @over;
342 long_response($self, sub {
344 my $msgs = $over->query_ts($ts, $prev);
347 join(">\r\n<", map { $_->mid } @$msgs ).
349 $prev = $msgs->[-1]->{num};
352 if (@over) { # continue onto next newsgroup
355 } else { # break out of the long response.
363 my ($self, $group) = @_;
364 my $no_such = '411 no such news group';
365 my $ng = $self->{nntpd}->{groups}->{$group} or return $no_such;
368 my ($min, $max) = $ng->mm->minmax;
371 $self->{article} = $min;
372 my $est_size = $max - $min;
373 "211 $est_size $min $max $group";
376 sub article_adj ($$) {
377 my ($self, $off) = @_;
378 my $ng = $self->{ng} or return '412 no newsgroup selected';
380 my $n = $self->{article};
381 defined $n or return '420 no current article has been selected';
384 my $mid = $ng->mm->mid_for($n);
386 $n = $off > 0 ? 'next' : 'previous';
387 return "421 no $n article in this group";
389 $self->{article} = $n;
390 "223 $n <$mid> article retrieved - request text separately";
393 sub cmd_next ($) { article_adj($_[0], 1) }
394 sub cmd_last ($) { article_adj($_[0], -1) }
396 # We want to encourage using email and CC-ing everybody involved to avoid
397 # the single-point-of-failure a single server provides.
400 my $ng = $self->{ng};
401 $ng ? "440 mailto:$ng->{-primary_address} to post"
402 : '440 posting not allowed'
407 res($self, '205 closing connection - goodbye!');
412 sub header_append ($$$) {
413 my ($hdr, $k, $v) = @_;
414 my @v = $hdr->header($k);
418 $hdr->header_set($k, @v, $v);
422 my ($self, $ng, $n, $mid) = @_;
423 my $ret = $self->{nntpd}->{servername} . " $ng->{newsgroup}:$n";
425 # num_for is pretty cheap and sometimes we'll lookup the existence
426 # of an article without getting even the OVER info. In other words,
427 # I'm not sure if its worth optimizing by scanning To:/Cc: and
428 # PublicInbox::ExtMsg on the PSGI end is just as expensive
429 foreach my $other (@{$self->{nntpd}->{grouplist}}) {
430 next if $ng eq $other;
431 my $num = eval { $other->mm->num_for($mid) } or next;
432 $ret .= " $other->{newsgroup}:$num";
437 sub set_nntp_headers ($$$$$) {
438 my ($self, $hdr, $ng, $n, $mid) = @_;
440 # why? leafnode requires a Path: header for some inexplicable
441 # reason. We'll fake the shortest one possible.
442 $hdr->header_set('Path', 'y');
444 # leafnode (and maybe other NNTP clients) have trouble dealing
445 # with v2 messages which have multiple Message-IDs (either due
446 # to our own content-based dedupe or buggy git-send-email versions).
447 my @mids = $hdr->header('Message-ID');
448 if (scalar(@mids) > 1) {
450 $hdr->header_set('Message-ID', $mid0);
451 my @alt = $hdr->header('X-Alt-Message-ID');
452 my %seen = map { $_ => 1 } (@alt, $mid0);
453 foreach my $m (@mids) {
457 $hdr->header_set('X-Alt-Message-ID', @alt);
461 my $xref = xref($self, $ng, $n, $mid);
462 $hdr->header_set('Xref', $xref);
463 $xref =~ s/:[0-9]+//g;
464 $hdr->header_set('Newsgroups', (split(/ /, $xref, 2))[1]);
465 header_append($hdr, 'List-Post', "<mailto:$ng->{-primary_address}>");
466 if (my $url = $ng->base_url) {
467 $mid = mid_escape($mid);
468 header_append($hdr, 'Archived-At', "<$url$mid/>");
469 header_append($hdr, 'List-Archive', "<$url>");
473 sub art_lookup ($$$) {
474 my ($self, $art, $set_headers) = @_;
475 my $ng = $self->{ng};
479 if ($art =~ /\A[0-9]+\z/) {
480 $err = '423 no such article number in this group';
483 } elsif ($art =~ /\A<([^>]+)>\z/) {
486 $n = $ng->mm->num_for($mid) if $ng;
487 goto found if defined $n;
488 foreach my $g (values %{$self->{nntpd}->{groups}}) {
489 $n = $g->mm->num_for($mid);
500 $err = '420 no current article has been selected';
501 $n = $self->{article};
502 defined $n or return $err;
504 $ng or return '412 no newsgroup has been selected';
505 $mid = $ng->mm->mid_for($n);
506 defined $mid or return $err;
509 my $smsg = $ng->over->get_art($n) or return $err;
510 my $msg = $ng->msg_by_smsg($smsg) or return $err;
511 my $s = Email::Simple->new($msg);
513 set_nntp_headers($self, $s->header_obj, $ng, $n, $mid);
516 $s->body_set('') if ($set_headers == 2);
518 [ $n, $mid, $s, $smsg->bytes, $smsg->lines, $ng ];
521 sub simple_body_write ($$) {
525 $body =~ s/^\./../smg;
526 $body =~ s/(?<!\r)\n/\r\n/sg;
527 msg_more($self, $body);
528 msg_more($self, "\r\n") unless $body =~ /\r\n\z/s;
533 my ($self, $art) = @_;
534 $self->{article} = $art if defined $art && $art =~ /\A[0-9]+\z/;
538 my $hdr = $_[0]->header_obj->as_string;
540 $hdr =~ s/(?<!\r)\n/\r\n/sg;
542 # for leafnode compatibility, we need to ensure Message-ID headers
543 # are only a single line. We can't subclass Email::Simple::Header
544 # and override _default_fold_at in here, either; since that won't
545 # affect messages already in the archive.
546 $hdr =~ s/^(Message-ID:)[ \t]*\r\n[ \t]+([^\r]+)\r\n/$1 $2\r\n/igsm;
551 sub cmd_article ($;$) {
552 my ($self, $art) = @_;
553 my $r = art_lookup($self, $art, 1);
554 return $r unless ref $r;
555 my ($n, $mid, $s) = @$r;
556 set_art($self, $art);
557 more($self, "220 $n <$mid> article retrieved - head and body follow");
558 msg_more($self, _header($s));
559 msg_more($self, "\r\n");
560 simple_body_write($self, $s);
564 my ($self, $art) = @_;
565 my $r = art_lookup($self, $art, 2);
566 return $r unless ref $r;
567 my ($n, $mid, $s) = @$r;
568 set_art($self, $art);
569 more($self, "221 $n <$mid> article retrieved - head follows");
570 msg_more($self, _header($s));
575 my ($self, $art) = @_;
576 my $r = art_lookup($self, $art, 0);
577 return $r unless ref $r;
578 my ($n, $mid, $s) = @$r;
579 set_art($self, $art);
580 more($self, "222 $n <$mid> article retrieved - body follows");
581 simple_body_write($self, $s);
585 my ($self, $art) = @_;
586 my $r = art_lookup($self, $art, 0);
587 return $r unless ref $r;
588 my ($n, $mid, undef) = @$r;
589 set_art($self, $art);
590 "223 $n <$mid> article retrieved - request text separately";
593 sub cmd_ihave ($) { '435 article not wanted - do not send it' }
595 sub cmd_date ($) { '111 '.strftime('%Y%m%d%H%M%S', gmtime(time)) }
599 more($self, '100 help text follows');
604 my ($self, $range) = @_;
605 my $ng = $self->{ng} or return '412 no news group has been selected';
606 defined $range or return '420 No article(s) selected';
608 my ($min, $max) = $ng->mm->minmax;
609 if ($range =~ /\A([0-9]+)\z/) {
611 } elsif ($range =~ /\A([0-9]+)-\z/) {
612 ($beg, $end) = ($1, $max);
613 } elsif ($range =~ /\A([0-9]+)-([0-9]+)\z/) {
614 ($beg, $end) = ($1, $2);
618 $beg = $min if ($beg < $min);
619 $end = $max if ($end > $max);
620 return '420 No article(s) selected' if ($beg > $end);
624 sub long_response ($$) {
625 my ($self, $cb) = @_; # cb returns true if more, false if done
627 my $fd = fileno($self->{sock});
628 defined $fd or return;
629 # make sure we disable reading during a long response,
630 # clients should not be sending us stuff and making us do more
631 # work while we are stream a response to them
633 my $long_cb; # DANGER: self-referential
635 # wbuf is unset or empty, here; $cb may add to it
636 my $more = eval { $cb->() };
637 if ($@ || !$self->{sock}) { # something bad happened...
639 my $diff = now() - $t0;
642 "%s during long response[$fd] - %0.6f",
645 out($self, " deferred[$fd] aborted - %0.6f", $diff);
647 } elsif ($more) { # $self->{wbuf}:
648 update_idle_time($self);
650 # no recursion, schedule another call ASAP
651 # but only after all pending writes are done
652 my $wbuf = $self->{wbuf} ||= [];
653 push @$wbuf, $long_cb;
655 # wbuf may be populated by $cb, no need to rearm if so:
656 requeue($self) if scalar(@$wbuf) == 1;
660 out($self, " deferred[$fd] done - %0.6f", now() - $t0);
661 requeue($self) unless $self->{wbuf};
664 $self->write($long_cb); # kick off!
668 sub hdr_message_id ($$$) { # optimize XHDR Message-ID [range] for slrnpull.
669 my ($self, $xhdr, $range) = @_;
671 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
672 my ($ng, $n) = mid_lookup($self, $1);
673 return r430 unless $n;
674 hdr_mid_response($self, $xhdr, $ng, $n, $range, $range);
675 } else { # numeric range
676 $range = $self->{article} unless defined $range;
677 my $r = get_range($self, $range);
678 return $r unless ref $r;
679 my $mm = $self->{ng}->mm;
680 my ($beg, $end) = @$r;
681 more($self, $xhdr ? r221 : r225);
682 long_response($self, sub {
683 my $r = $mm->msg_range(\$beg, $end);
685 more($self, join("\r\n", map {
693 sub mid_lookup ($$) {
694 my ($self, $mid) = @_;
695 my $self_ng = $self->{ng};
697 my $n = $self_ng->mm->num_for($mid);
698 return ($self_ng, $n) if defined $n;
700 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
701 next if defined $self_ng && $ng eq $self_ng;
702 my $n = $ng->mm->num_for($mid);
703 return ($ng, $n) if defined $n;
708 sub hdr_xref ($$$) { # optimize XHDR Xref [range] for rtin
709 my ($self, $xhdr, $range) = @_;
711 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
713 my ($ng, $n) = mid_lookup($self, $mid);
714 return r430 unless $n;
715 hdr_mid_response($self, $xhdr, $ng, $n, $range,
716 xref($self, $ng, $n, $mid));
717 } else { # numeric range
718 $range = $self->{article} unless defined $range;
719 my $r = get_range($self, $range);
720 return $r unless ref $r;
721 my $ng = $self->{ng};
723 my ($beg, $end) = @$r;
724 more($self, $xhdr ? r221 : r225);
725 long_response($self, sub {
726 my $r = $mm->msg_range(\$beg, $end);
728 more($self, join("\r\n", map {
730 "$num ".xref($self, $ng, $num, $_->[1]);
737 sub over_header_for {
738 my ($over, $num, $field) = @_;
739 my $smsg = $over->get_art($num) or return;
740 return PublicInbox::SearchMsg::date($smsg) if $field eq 'date';
744 sub hdr_searchmsg ($$$$) {
745 my ($self, $xhdr, $field, $range) = @_;
746 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
747 my ($ng, $n) = mid_lookup($self, $1);
748 return r430 unless defined $n;
749 my $v = over_header_for($ng->over, $n, $field);
750 hdr_mid_response($self, $xhdr, $ng, $n, $range, $v);
751 } else { # numeric range
752 $range = $self->{article} unless defined $range;
753 my $over = $self->{ng}->over;
754 my $mm = $self->{ng}->mm;
755 my $r = get_range($self, $range);
756 return $r unless ref $r;
757 my ($beg, $end) = @$r;
758 more($self, $xhdr ? r221 : r225);
760 long_response($self, sub {
761 my $msgs = $over->query_xover($cur, $end);
762 my $nr = scalar @$msgs or return;
764 foreach my $s (@$msgs) {
765 $tmp .= $s->{num} . ' ' . $s->$field . "\r\n";
768 msg_more($self, $tmp);
769 $cur = $msgs->[-1]->{num} + 1;
775 my ($self, $xhdr, $header, $range) = @_;
776 my $sub = lc $header;
777 if ($sub eq 'message-id') {
778 hdr_message_id($self, $xhdr, $range);
779 } elsif ($sub eq 'xref') {
780 hdr_xref($self, $xhdr, $range);
781 } elsif ($sub =~ /\A(?:subject|references|date|from|to|cc|
783 hdr_searchmsg($self, $xhdr, $sub, $range);
784 } elsif ($sub =~ /\A:(bytes|lines)\z/) {
785 hdr_searchmsg($self, $xhdr, $1, $range);
787 $xhdr ? (r221 . "\r\n.") : "503 HDR not permitted on $header";
793 my ($self, $header, $range) = @_;
794 do_hdr($self, 0, $header, $range);
798 sub cmd_xhdr ($$;$) {
799 my ($self, $header, $range) = @_;
800 do_hdr($self, 1, $header, $range);
803 sub hdr_mid_prefix ($$$$$) {
804 my ($self, $xhdr, $ng, $n, $mid) = @_;
805 return $mid if $xhdr;
807 # HDR for RFC 3977 users
808 if (my $self_ng = $self->{ng}) {
809 ($self_ng eq $ng) ? $n : '0';
815 sub hdr_mid_response ($$$$$$) {
816 my ($self, $xhdr, $ng, $n, $mid, $v) = @_; # r: art_lookup result
819 $res .= r221 . "\r\n";
820 $res .= "$mid $v\r\n";
822 $res .= r225 . "\r\n";
823 my $pfx = hdr_mid_prefix($self, $xhdr, $ng, $n, $mid);
824 $res .= "$pfx $v\r\n";
826 res($self, $res .= '.');
830 sub cmd_xrover ($;$) {
831 my ($self, $range) = @_;
832 my $ng = $self->{ng} or return '412 no newsgroup selected';
833 (defined $range && $range =~ /[<>]/) and
834 return '420 No article(s) selected'; # no message IDs
836 $range = $self->{article} unless defined $range;
837 my $r = get_range($self, $range);
838 return $r unless ref $r;
839 my ($beg, $end) = @$r;
841 my $over = $ng->over;
842 more($self, '224 Overview information follows');
844 long_response($self, sub {
845 my $h = over_header_for($over, $beg, 'references');
846 more($self, "$beg $h") if defined($h);
851 sub over_line ($$$$) {
852 my ($self, $ng, $num, $smsg) = @_;
853 # n.b. field access and procedural calls can be
854 # 10%-15% faster than OO method calls:
855 my $s = join("\t", $num,
858 PublicInbox::SearchMsg::date($smsg),
863 "Xref: " . xref($self, $ng, $num, $smsg->{mid}));
869 my ($self, $range) = @_;
870 if ($range && $range =~ /\A<(.+)>\z/) {
871 my ($ng, $n) = mid_lookup($self, $1);
872 defined $n or return r430;
873 my $smsg = $ng->over->get_art($n) or return r430;
874 more($self, '224 Overview information follows (multi-line)');
876 # Only set article number column if it's the current group
877 my $self_ng = $self->{ng};
878 $n = 0 if (!$self_ng || $self_ng ne $ng);
879 more($self, over_line($self, $ng, $n, $smsg));
882 cmd_xover($self, $range);
886 sub cmd_xover ($;$) {
887 my ($self, $range) = @_;
888 $range = $self->{article} unless defined $range;
889 my $r = get_range($self, $range);
890 return $r unless ref $r;
891 my ($beg, $end) = @$r;
892 more($self, "224 Overview information follows for $beg to $end");
893 my $over = $self->{ng}->over;
895 long_response($self, sub {
896 my $msgs = $over->query_xover($cur, $end);
897 my $nr = scalar @$msgs or return;
900 more($self, join("\r\n", map {
901 over_line($self, $self->{ng}, $_->{num}, $_);
903 $cur = $msgs->[-1]->{num} + 1;
907 sub cmd_starttls ($) {
909 my $sock = $self->{sock} or return;
911 (ref($sock) eq 'IO::Socket::SSL') and return '502 Command unavailable';
912 my $opt = $self->{nntpd}->{accept_tls} or
913 return '580 can not initiate TLS negotiation';
914 res($self, '382 Continue with TLS negotiation');
915 $self->{sock} = IO::Socket::SSL->start_SSL($sock, %$opt);
916 requeue($self) if PublicInbox::DS::accept_tls_step($self);
921 my ($self, $mid) = @_;
922 return r501 unless $mid =~ /\A<(.+)>\z/;
925 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
926 my $n = $ng->mm->num_for($mid);
927 push @paths, "$ng->{newsgroup}/$n" if defined $n;
929 return '430 no such article on server' unless @paths;
930 '223 '.join(' ', @paths);
933 sub res ($$) { do_write($_[0], $_[1] . "\r\n") }
935 sub more ($$) { msg_more($_[0], $_[1] . "\r\n") }
939 my $done = $self->write(\($_[1]));
940 return 0 unless $self->{sock};
946 my ($self, $fmt, @args) = @_;
947 printf { $self->{nntpd}->{err} } $fmt."\n", @args;
951 my ($self, $fmt, @args) = @_;
952 printf { $self->{nntpd}->{out} } $fmt."\n", @args;
955 # callback used by PublicInbox::DS for any (e)poll (in/out/hup/err)
959 return unless $self->flush_write && $self->{sock};
961 update_idle_time($self);
962 # only read more requests if we've drained the write buffer,
963 # otherwise we can be buffering infinitely w/o backpressure
965 use constant LINE_MAX => 512; # RFC 977 section 2.3
966 my $rbuf = $self->{rbuf} // (\(my $x = ''));
969 if (index($$rbuf, "\n") < 0) {
970 my $off = bytes::length($$rbuf);
971 $r = $self->do_read($rbuf, LINE_MAX, $off) or return;
973 while ($r > 0 && $$rbuf =~ s/\A[ \t\r\n]*([^\r\n]*)\r?\n//) {
975 return $self->close if $line =~ /[[:cntrl:]]/s;
977 my $fd = fileno($self->{sock});
978 $r = eval { process_line($self, $line) };
979 my $pending = $self->{wbuf} ? ' pending' : '';
980 out($self, "[$fd] %s - %0.6f$pending", $line, now() - $t0);
983 return $self->close if $r < 0;
984 my $len = bytes::length($$rbuf);
985 return $self->close if ($len >= LINE_MAX);
987 $self->{rbuf} = $rbuf;
989 delete $self->{rbuf};
991 update_idle_time($self);
993 # maybe there's more pipelined data, or we'll have
994 # to register it for socket-readiness notifications
995 requeue($self) unless $self->{wbuf};
998 sub not_idle_long ($$) {
999 my ($self, $now) = @_;
1000 my $sock = $self->{sock} or return;
1001 my $ary = $EXPMAP->{fileno($sock)} or return;
1002 my $exp_at = $ary->[0] + $EXPTIME;
1006 # for graceful shutdown in PublicInbox::Daemon:
1008 my ($self, $now) = @_;
1009 ($self->{rbuf} || $self->{wbuf} || not_idle_long($self, $now));