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 long_res);
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 foreach my $nntp (@$q) {
49 # for request && response protocols, always finish writing
50 # before finishing reading:
51 if (my $long_cb = $nntp->{long_res}) {
52 $nntp->write($long_cb);
54 # pipelined request, we bypassed socket-readiness
63 $nextt ||= PublicInbox::EvCleanup::asap(*next_tick);
66 sub update_idle_time ($) {
68 my $sock = $self->{sock} or return;
69 $EXPMAP->{fileno($sock)} = [ now(), $self ];
75 my $old = $now - $exp;
79 while (my ($fd, $v) = each %$EXPMAP) {
80 my ($idle_time, $nntp) = @$v;
81 if ($idle_time < $old) {
95 $expt = PublicInbox::EvCleanup::later(*expire_old);
98 # noop to kick outselves out of the loop ASAP so descriptors
100 PublicInbox::EvCleanup::asap(sub {}) if $closed;
104 sub greet ($) { $_[0]->write($_[0]->{nntpd}->{greet}) };
107 my ($class, $sock, $nntpd) = @_;
108 my $self = fields::new($class);
109 my $ev = EPOLLOUT | EPOLLONESHOT;
111 if (ref($sock) eq 'IO::Socket::SSL' && !$sock->accept_SSL) {
112 $ev = PublicInbox::TLS::epollbit() or return CORE::close($sock);
114 $wbuf->[0] = \&PublicInbox::DS::accept_tls_step;
116 $self->SUPER::new($sock, $ev);
117 $self->{nntpd} = $nntpd;
118 push @$wbuf, \&greet;
119 $self->{wbuf} = $wbuf;
121 update_idle_time($self);
122 $expt ||= PublicInbox::EvCleanup::later(*expire_old);
127 my ($cb, $argc) = @_;
128 my $tot = prototype $cb;
129 my ($nreq, undef) = split(';', $tot);
130 $nreq = ($nreq =~ tr/$//) - 1;
131 $tot = ($tot =~ tr/$//) - 1;
132 ($argc <= $tot && $argc >= $nreq);
135 # returns 1 if we can continue, 0 if not due to buffered writes or disconnect
136 sub process_line ($$) {
138 my ($req, @args) = split(/[ \t]/, $l);
139 return 1 unless defined($req); # skip blank line
143 $req = $DISABLED{$req} ? undef : *{'cmd_'.$req}{CODE};
145 return res($self, '500 command not recognized') unless $req;
146 return res($self, r501) unless args_ok($req, scalar @args);
148 my $res = eval { $req->($self, @args) };
150 if ($err && $self->{sock}) {
153 err($self, 'error from: %s (%s)', $l, $err);
154 $res = '503 program fault - command not performed';
156 return 0 unless defined $res;
161 my ($self, $arg) = @_;
163 return r501 unless $arg eq 'READER';
164 '201 Posting prohibited';
167 sub cmd_slave ($) { '202 slave status noted' }
169 sub cmd_xgtitle ($;$) {
170 my ($self, $wildmat) = @_;
171 more($self, '282 list of groups and descriptions follows');
172 list_newsgroups($self, $wildmat);
176 sub list_overview_fmt ($) {
178 msg_more($self, $OVERVIEW_FMT);
181 sub list_headers ($;$) {
183 msg_more($self, $LIST_HEADERS);
186 sub list_active ($;$) {
187 my ($self, $wildmat) = @_;
188 wildmat2re($wildmat);
189 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
190 $ng->{newsgroup} =~ $wildmat or next;
191 group_line($self, $ng);
195 sub list_active_times ($;$) {
196 my ($self, $wildmat) = @_;
197 wildmat2re($wildmat);
198 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
199 $ng->{newsgroup} =~ $wildmat or next;
200 my $c = eval { $ng->mm->created_at } || time;
201 more($self, "$ng->{newsgroup} $c $ng->{-primary_address}");
205 sub list_newsgroups ($;$) {
206 my ($self, $wildmat) = @_;
207 wildmat2re($wildmat);
208 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
209 $ng->{newsgroup} =~ $wildmat or next;
210 my $d = $ng->description;
211 more($self, "$ng->{newsgroup} $d");
215 # LIST SUBSCRIPTIONS, DISTRIB.PATS are not supported
216 sub cmd_list ($;$$) {
217 my ($self, @args) = @_;
219 my $arg = shift @args;
220 $arg =~ tr/A-Z./a-z_/;
222 return r501 if $DISABLED{$arg};
228 return r501 unless $arg && args_ok($arg, scalar @args);
229 more($self, '215 information follows');
230 $arg->($self, @args);
232 more($self, '215 list of newsgroups follows');
233 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
234 group_line($self, $ng);
240 sub cmd_listgroup ($;$) {
241 my ($self, $group) = @_;
242 if (defined $group) {
243 my $res = cmd_group($self, $group);
244 return $res if ($res !~ /\A211 /);
248 $self->{ng} or return '412 no newsgroup selected';
250 long_response($self, sub {
251 my $ary = $self->{ng}->mm->ids_after(\$n);
252 scalar @$ary or return;
253 more($self, join("\r\n", @$ary));
258 sub parse_time ($$;$) {
259 my ($date, $time, $gmt) = @_;
260 my ($hh, $mm, $ss) = unpack('A2A2A2', $time);
262 $gmt =~ /\A(?:UTC|GMT)\z/i or die "GM invalid: $gmt";
265 my @now = $gmt ? gmtime : localtime;
266 my ($YYYY, $MM, $DD);
267 if (bytes::length($date) == 8) { # RFC 3977 allows YYYYMMDD
268 ($YYYY, $MM, $DD) = unpack('A4A2A2', $date);
269 } else { # legacy clients send YYMMDD
270 ($YYYY, $MM, $DD) = unpack('A2A2A2', $date);
271 my $cur_year = $now[5] + 1900;
272 if ($YYYY > $cur_year) {
273 $YYYY += int($cur_year / 1000) * 1000 - 100;
277 timegm($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
279 timelocal($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
283 sub group_line ($$) {
284 my ($self, $ng) = @_;
285 my ($min, $max) = $ng->mm->minmax;
286 more($self, "$ng->{newsgroup} $max $min n") if defined $min && defined $max;
289 sub cmd_newgroups ($$$;$$) {
290 my ($self, $date, $time, $gmt, $dists) = @_;
291 my $ts = eval { parse_time($date, $time, $gmt) };
295 more($self, '231 list of new newsgroups follows');
296 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
297 my $c = eval { $ng->mm->created_at } || 0;
298 next unless $c > $ts;
299 group_line($self, $ng);
304 sub wildmat2re (;$) {
305 return $_[0] = qr/.*/ if (!defined $_[0] || $_[0] eq '*');
310 $tmp =~ s#(?<!\\)\[(.+)(?<!\\)\]#
312 my $key = sha1_hex($orig . $salt);
313 $orig =~ s/([^\w\-])+/\Q$1/g;
317 my %map = ('*' => '.*', '?' => '.' );
318 $tmp =~ s#(?<!\\)([^\w\\])#$map{$1} || "\Q$1"#ge;
320 $tmp =~ s#([a-f0-9]{40})#
321 my $orig = $keep{$1};
322 defined $orig ? $orig : $1;
325 $_[0] = qr/\A$tmp\z/;
329 return $_[0] = qr/\A\z/ unless defined $_[0];
330 my %map = ('*' => '.*', ',' => '|');
331 $_[0] =~ s!(.)!$map{$1} || "\Q$1"!ge;
332 $_[0] = qr/\A(?:$_[0])\z/;
335 sub cmd_newnews ($$$$;$$) {
336 my ($self, $newsgroups, $date, $time, $gmt, $dists) = @_;
337 my $ts = eval { parse_time($date, $time, $gmt) };
339 more($self, '230 list of new articles by message-id follows');
340 my ($keep, $skip) = split('!', $newsgroups, 2);
344 foreach my $ng (@{$self->{nntpd}->{grouplist}}) {
345 $ng->{newsgroup} =~ $keep or next;
346 $ng->{newsgroup} =~ $skip and next;
347 my $over = $ng->over or next;
350 return '.' unless @over;
353 long_response($self, sub {
355 my $msgs = $over->query_ts($ts, $prev);
358 join(">\r\n<", map { $_->mid } @$msgs ).
360 $prev = $msgs->[-1]->{num};
363 if (@over) { # continue onto next newsgroup
366 } else { # break out of the long response.
374 my ($self, $group) = @_;
375 my $no_such = '411 no such news group';
376 my $ng = $self->{nntpd}->{groups}->{$group} or return $no_such;
379 my ($min, $max) = $ng->mm->minmax;
382 $self->{article} = $min;
383 my $est_size = $max - $min;
384 "211 $est_size $min $max $group";
387 sub article_adj ($$) {
388 my ($self, $off) = @_;
389 my $ng = $self->{ng} or return '412 no newsgroup selected';
391 my $n = $self->{article};
392 defined $n or return '420 no current article has been selected';
395 my $mid = $ng->mm->mid_for($n);
397 $n = $off > 0 ? 'next' : 'previous';
398 return "421 no $n article in this group";
400 $self->{article} = $n;
401 "223 $n <$mid> article retrieved - request text separately";
404 sub cmd_next ($) { article_adj($_[0], 1) }
405 sub cmd_last ($) { article_adj($_[0], -1) }
407 # We want to encourage using email and CC-ing everybody involved to avoid
408 # the single-point-of-failure a single server provides.
411 my $ng = $self->{ng};
412 $ng ? "440 mailto:$ng->{-primary_address} to post"
413 : '440 posting not allowed'
418 res($self, '205 closing connection - goodbye!');
423 sub header_append ($$$) {
424 my ($hdr, $k, $v) = @_;
425 my @v = $hdr->header($k);
429 $hdr->header_set($k, @v, $v);
433 my ($self, $ng, $n, $mid) = @_;
434 my $ret = $self->{nntpd}->{servername} . " $ng->{newsgroup}:$n";
436 # num_for is pretty cheap and sometimes we'll lookup the existence
437 # of an article without getting even the OVER info. In other words,
438 # I'm not sure if its worth optimizing by scanning To:/Cc: and
439 # PublicInbox::ExtMsg on the PSGI end is just as expensive
440 foreach my $other (@{$self->{nntpd}->{grouplist}}) {
441 next if $ng eq $other;
442 my $num = eval { $other->mm->num_for($mid) } or next;
443 $ret .= " $other->{newsgroup}:$num";
448 sub set_nntp_headers ($$$$$) {
449 my ($self, $hdr, $ng, $n, $mid) = @_;
451 # why? leafnode requires a Path: header for some inexplicable
452 # reason. We'll fake the shortest one possible.
453 $hdr->header_set('Path', 'y');
455 # leafnode (and maybe other NNTP clients) have trouble dealing
456 # with v2 messages which have multiple Message-IDs (either due
457 # to our own content-based dedupe or buggy git-send-email versions).
458 my @mids = $hdr->header('Message-ID');
459 if (scalar(@mids) > 1) {
461 $hdr->header_set('Message-ID', $mid0);
462 my @alt = $hdr->header('X-Alt-Message-ID');
463 my %seen = map { $_ => 1 } (@alt, $mid0);
464 foreach my $m (@mids) {
468 $hdr->header_set('X-Alt-Message-ID', @alt);
472 my $xref = xref($self, $ng, $n, $mid);
473 $hdr->header_set('Xref', $xref);
474 $xref =~ s/:[0-9]+//g;
475 $hdr->header_set('Newsgroups', (split(/ /, $xref, 2))[1]);
476 header_append($hdr, 'List-Post', "<mailto:$ng->{-primary_address}>");
477 if (my $url = $ng->base_url) {
478 $mid = mid_escape($mid);
479 header_append($hdr, 'Archived-At', "<$url$mid/>");
480 header_append($hdr, 'List-Archive', "<$url>");
484 sub art_lookup ($$$) {
485 my ($self, $art, $set_headers) = @_;
486 my $ng = $self->{ng};
490 if ($art =~ /\A[0-9]+\z/) {
491 $err = '423 no such article number in this group';
494 } elsif ($art =~ /\A<([^>]+)>\z/) {
497 $n = $ng->mm->num_for($mid) if $ng;
498 goto found if defined $n;
499 foreach my $g (values %{$self->{nntpd}->{groups}}) {
500 $n = $g->mm->num_for($mid);
511 $err = '420 no current article has been selected';
512 $n = $self->{article};
513 defined $n or return $err;
515 $ng or return '412 no newsgroup has been selected';
516 $mid = $ng->mm->mid_for($n);
517 defined $mid or return $err;
520 my $smsg = $ng->over->get_art($n) or return $err;
521 my $msg = $ng->msg_by_smsg($smsg) or return $err;
522 my $s = Email::Simple->new($msg);
524 set_nntp_headers($self, $s->header_obj, $ng, $n, $mid);
527 $s->body_set('') if ($set_headers == 2);
529 [ $n, $mid, $s, $smsg->bytes, $smsg->lines, $ng ];
532 sub simple_body_write ($$) {
536 $body =~ s/^\./../smg;
537 $body =~ s/(?<!\r)\n/\r\n/sg;
538 msg_more($self, $body);
539 msg_more($self, "\r\n") unless $body =~ /\r\n\z/s;
544 my ($self, $art) = @_;
545 $self->{article} = $art if defined $art && $art =~ /\A[0-9]+\z/;
549 my $hdr = $_[0]->header_obj->as_string;
551 $hdr =~ s/(?<!\r)\n/\r\n/sg;
553 # for leafnode compatibility, we need to ensure Message-ID headers
554 # are only a single line. We can't subclass Email::Simple::Header
555 # and override _default_fold_at in here, either; since that won't
556 # affect messages already in the archive.
557 $hdr =~ s/^(Message-ID:)[ \t]*\r\n[ \t]+([^\r]+)\r\n/$1 $2\r\n/igsm;
562 sub cmd_article ($;$) {
563 my ($self, $art) = @_;
564 my $r = art_lookup($self, $art, 1);
565 return $r unless ref $r;
566 my ($n, $mid, $s) = @$r;
567 set_art($self, $art);
568 more($self, "220 $n <$mid> article retrieved - head and body follow");
569 msg_more($self, _header($s));
570 msg_more($self, "\r\n");
571 simple_body_write($self, $s);
575 my ($self, $art) = @_;
576 my $r = art_lookup($self, $art, 2);
577 return $r unless ref $r;
578 my ($n, $mid, $s) = @$r;
579 set_art($self, $art);
580 more($self, "221 $n <$mid> article retrieved - head follows");
581 msg_more($self, _header($s));
586 my ($self, $art) = @_;
587 my $r = art_lookup($self, $art, 0);
588 return $r unless ref $r;
589 my ($n, $mid, $s) = @$r;
590 set_art($self, $art);
591 more($self, "222 $n <$mid> article retrieved - body follows");
592 simple_body_write($self, $s);
596 my ($self, $art) = @_;
597 my $r = art_lookup($self, $art, 0);
598 return $r unless ref $r;
599 my ($n, $mid, undef) = @$r;
600 set_art($self, $art);
601 "223 $n <$mid> article retrieved - request text separately";
604 sub cmd_ihave ($) { '435 article not wanted - do not send it' }
606 sub cmd_date ($) { '111 '.strftime('%Y%m%d%H%M%S', gmtime(time)) }
610 more($self, '100 help text follows');
615 my ($self, $range) = @_;
616 my $ng = $self->{ng} or return '412 no news group has been selected';
617 defined $range or return '420 No article(s) selected';
619 my ($min, $max) = $ng->mm->minmax;
620 if ($range =~ /\A([0-9]+)\z/) {
622 } elsif ($range =~ /\A([0-9]+)-\z/) {
623 ($beg, $end) = ($1, $max);
624 } elsif ($range =~ /\A([0-9]+)-([0-9]+)\z/) {
625 ($beg, $end) = ($1, $2);
629 $beg = $min if ($beg < $min);
630 $end = $max if ($end > $max);
631 return '420 No article(s) selected' if ($beg > $end);
635 sub long_response ($$) {
636 my ($self, $cb) = @_;
637 die "BUG: nested long response" if $self->{long_res};
639 my $fd = fileno($self->{sock});
640 defined $fd or return;
641 # make sure we disable reading during a long response,
642 # clients should not be sending us stuff and making us do more
643 # work while we are stream a response to them
645 $self->{long_res} = sub {
646 my $more = eval { $cb->() };
647 if ($@ || !$self->{sock}) { # something bad happened...
648 delete $self->{long_res};
652 "%s during long response[$fd] - %0.6f",
656 update_idle_time($self);
659 out($self, " deferred[$fd] aborted - %0.6f",
662 } elsif ($more) { # $self->{wbuf}:
663 # no recursion, schedule another call ASAP
664 # but only after all pending writes are done
665 update_idle_time($self);
668 delete $self->{long_res};
670 out($self, " deferred[$fd] done - %0.6f", now() - $t0);
674 $self->{long_res}->(); # kick off!
678 sub hdr_message_id ($$$) { # optimize XHDR Message-ID [range] for slrnpull.
679 my ($self, $xhdr, $range) = @_;
681 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
682 my ($ng, $n) = mid_lookup($self, $1);
683 return r430 unless $n;
684 hdr_mid_response($self, $xhdr, $ng, $n, $range, $range);
685 } else { # numeric range
686 $range = $self->{article} unless defined $range;
687 my $r = get_range($self, $range);
688 return $r unless ref $r;
689 my $mm = $self->{ng}->mm;
690 my ($beg, $end) = @$r;
691 more($self, $xhdr ? r221 : r225);
692 long_response($self, sub {
693 my $r = $mm->msg_range(\$beg, $end);
695 more($self, join("\r\n", map {
703 sub mid_lookup ($$) {
704 my ($self, $mid) = @_;
705 my $self_ng = $self->{ng};
707 my $n = $self_ng->mm->num_for($mid);
708 return ($self_ng, $n) if defined $n;
710 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
711 next if defined $self_ng && $ng eq $self_ng;
712 my $n = $ng->mm->num_for($mid);
713 return ($ng, $n) if defined $n;
718 sub hdr_xref ($$$) { # optimize XHDR Xref [range] for rtin
719 my ($self, $xhdr, $range) = @_;
721 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
723 my ($ng, $n) = mid_lookup($self, $mid);
724 return r430 unless $n;
725 hdr_mid_response($self, $xhdr, $ng, $n, $range,
726 xref($self, $ng, $n, $mid));
727 } else { # numeric range
728 $range = $self->{article} unless defined $range;
729 my $r = get_range($self, $range);
730 return $r unless ref $r;
731 my $ng = $self->{ng};
733 my ($beg, $end) = @$r;
734 more($self, $xhdr ? r221 : r225);
735 long_response($self, sub {
736 my $r = $mm->msg_range(\$beg, $end);
738 more($self, join("\r\n", map {
740 "$num ".xref($self, $ng, $num, $_->[1]);
747 sub over_header_for {
748 my ($over, $num, $field) = @_;
749 my $smsg = $over->get_art($num) or return;
750 return PublicInbox::SearchMsg::date($smsg) if $field eq 'date';
754 sub hdr_searchmsg ($$$$) {
755 my ($self, $xhdr, $field, $range) = @_;
756 if (defined $range && $range =~ /\A<(.+)>\z/) { # Message-ID
757 my ($ng, $n) = mid_lookup($self, $1);
758 return r430 unless defined $n;
759 my $v = over_header_for($ng->over, $n, $field);
760 hdr_mid_response($self, $xhdr, $ng, $n, $range, $v);
761 } else { # numeric range
762 $range = $self->{article} unless defined $range;
763 my $over = $self->{ng}->over;
764 my $mm = $self->{ng}->mm;
765 my $r = get_range($self, $range);
766 return $r unless ref $r;
767 my ($beg, $end) = @$r;
768 more($self, $xhdr ? r221 : r225);
770 long_response($self, sub {
771 my $msgs = $over->query_xover($cur, $end);
772 my $nr = scalar @$msgs or return;
774 foreach my $s (@$msgs) {
775 $tmp .= $s->{num} . ' ' . $s->$field . "\r\n";
778 msg_more($self, $tmp);
779 $cur = $msgs->[-1]->{num} + 1;
785 my ($self, $xhdr, $header, $range) = @_;
786 my $sub = lc $header;
787 if ($sub eq 'message-id') {
788 hdr_message_id($self, $xhdr, $range);
789 } elsif ($sub eq 'xref') {
790 hdr_xref($self, $xhdr, $range);
791 } elsif ($sub =~ /\A(?:subject|references|date|from|to|cc|
793 hdr_searchmsg($self, $xhdr, $sub, $range);
794 } elsif ($sub =~ /\A:(bytes|lines)\z/) {
795 hdr_searchmsg($self, $xhdr, $1, $range);
797 $xhdr ? (r221 . "\r\n.") : "503 HDR not permitted on $header";
803 my ($self, $header, $range) = @_;
804 do_hdr($self, 0, $header, $range);
808 sub cmd_xhdr ($$;$) {
809 my ($self, $header, $range) = @_;
810 do_hdr($self, 1, $header, $range);
813 sub hdr_mid_prefix ($$$$$) {
814 my ($self, $xhdr, $ng, $n, $mid) = @_;
815 return $mid if $xhdr;
817 # HDR for RFC 3977 users
818 if (my $self_ng = $self->{ng}) {
819 ($self_ng eq $ng) ? $n : '0';
825 sub hdr_mid_response ($$$$$$) {
826 my ($self, $xhdr, $ng, $n, $mid, $v) = @_; # r: art_lookup result
829 $res .= r221 . "\r\n";
830 $res .= "$mid $v\r\n";
832 $res .= r225 . "\r\n";
833 my $pfx = hdr_mid_prefix($self, $xhdr, $ng, $n, $mid);
834 $res .= "$pfx $v\r\n";
836 res($self, $res .= '.');
840 sub cmd_xrover ($;$) {
841 my ($self, $range) = @_;
842 my $ng = $self->{ng} or return '412 no newsgroup selected';
843 (defined $range && $range =~ /[<>]/) and
844 return '420 No article(s) selected'; # no message IDs
846 $range = $self->{article} unless defined $range;
847 my $r = get_range($self, $range);
848 return $r unless ref $r;
849 my ($beg, $end) = @$r;
851 my $over = $ng->over;
852 more($self, '224 Overview information follows');
854 long_response($self, sub {
855 my $h = over_header_for($over, $beg, 'references');
856 more($self, "$beg $h") if defined($h);
861 sub over_line ($$$$) {
862 my ($self, $ng, $num, $smsg) = @_;
863 # n.b. field access and procedural calls can be
864 # 10%-15% faster than OO method calls:
865 my $s = join("\t", $num,
868 PublicInbox::SearchMsg::date($smsg),
873 "Xref: " . xref($self, $ng, $num, $smsg->{mid}));
879 my ($self, $range) = @_;
880 if ($range && $range =~ /\A<(.+)>\z/) {
881 my ($ng, $n) = mid_lookup($self, $1);
882 defined $n or return r430;
883 my $smsg = $ng->over->get_art($n) or return r430;
884 more($self, '224 Overview information follows (multi-line)');
886 # Only set article number column if it's the current group
887 my $self_ng = $self->{ng};
888 $n = 0 if (!$self_ng || $self_ng ne $ng);
889 more($self, over_line($self, $ng, $n, $smsg));
892 cmd_xover($self, $range);
896 sub cmd_xover ($;$) {
897 my ($self, $range) = @_;
898 $range = $self->{article} unless defined $range;
899 my $r = get_range($self, $range);
900 return $r unless ref $r;
901 my ($beg, $end) = @$r;
902 more($self, "224 Overview information follows for $beg to $end");
903 my $over = $self->{ng}->over;
905 long_response($self, sub {
906 my $msgs = $over->query_xover($cur, $end);
907 my $nr = scalar @$msgs or return;
910 more($self, join("\r\n", map {
911 over_line($self, $self->{ng}, $_->{num}, $_);
913 $cur = $msgs->[-1]->{num} + 1;
917 sub cmd_starttls ($) {
919 my $sock = $self->{sock} or return;
921 (ref($sock) eq 'IO::Socket::SSL') and return '502 Command unavailable';
922 my $opt = $self->{nntpd}->{accept_tls} or
923 return '580 can not initiate TLS negotiation';
924 res($self, '382 Continue with TLS negotiation');
925 $self->{sock} = IO::Socket::SSL->start_SSL($sock, %$opt);
926 requeue($self) if PublicInbox::DS::accept_tls_step($self);
931 my ($self, $mid) = @_;
932 return r501 unless $mid =~ /\A<(.+)>\z/;
935 foreach my $ng (values %{$self->{nntpd}->{groups}}) {
936 my $n = $ng->mm->num_for($mid);
937 push @paths, "$ng->{newsgroup}/$n" if defined $n;
939 return '430 no such article on server' unless @paths;
940 '223 '.join(' ', @paths);
943 sub res ($$) { do_write($_[0], $_[1] . "\r\n") }
945 sub more ($$) { msg_more($_[0], $_[1] . "\r\n") }
949 my $done = $self->write(\($_[1]));
950 return 0 unless $self->{sock};
956 my ($self, $fmt, @args) = @_;
957 printf { $self->{nntpd}->{err} } $fmt."\n", @args;
961 my ($self, $fmt, @args) = @_;
962 printf { $self->{nntpd}->{out} } $fmt."\n", @args;
965 # callback used by PublicInbox::DS for any (e)poll (in/out/hup/err)
969 return unless $self->flush_write && $self->{sock};
971 update_idle_time($self);
972 # only read more requests if we've drained the write buffer,
973 # otherwise we can be buffering infinitely w/o backpressure
975 use constant LINE_MAX => 512; # RFC 977 section 2.3
976 my $rbuf = \($self->{rbuf});
979 if (index($$rbuf, "\n") < 0) {
980 my $off = bytes::length($$rbuf);
981 $r = $self->do_read($rbuf, LINE_MAX, $off) or return;
983 while ($r > 0 && $$rbuf =~ s/\A[ \t\r\n]*([^\r\n]*)\r?\n//) {
985 return $self->close if $line =~ /[[:cntrl:]]/s;
987 my $fd = fileno($self->{sock});
988 $r = eval { process_line($self, $line) };
989 my $d = $self->{long_res} ?
990 " deferred[$fd]" : '';
991 out($self, "[$fd] %s - %0.6f$d", $line, now() - $t0);
994 return $self->close if $r < 0;
995 my $len = bytes::length($$rbuf);
996 return $self->close if ($len >= LINE_MAX);
997 update_idle_time($self);
999 # maybe there's more pipelined data, or we'll have
1000 # to register it for socket-readiness notifications
1001 requeue($self) unless ($self->{long_res} || $self->{wbuf});
1004 sub not_idle_long ($$) {
1005 my ($self, $now) = @_;
1006 my $sock = $self->{sock} or return;
1007 my $ary = $EXPMAP->{fileno($sock)} or return;
1008 my $exp_at = $ary->[0] + $EXPTIME;
1012 # for graceful shutdown in PublicInbox::Daemon:
1014 my ($self, $now) = @_;
1015 ($self->{rbuf} ne '' || $self->{long_res} ||
1016 $self->{wbuf} || not_idle_long($self, $now));