1 # Copyright (C) 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
6 # nntpd: PublicInbox::NNTPD ref
7 # article: per-session current article number
8 # ibx: PublicInbox::Inbox ref
9 # long_cb: long_response private data
10 package PublicInbox::NNTP;
13 use parent qw(PublicInbox::DS);
14 use PublicInbox::MID qw(mid_escape $MID_EXTRACT);
16 use POSIX qw(strftime);
17 use PublicInbox::DS qw(now);
18 use Digest::SHA qw(sha1_hex);
19 use Time::Local qw(timegm timelocal);
20 use PublicInbox::GitAsyncCat;
21 use PublicInbox::Address;
24 LINE_MAX => 512, # RFC 977 section 2.3
25 r501 => '501 command syntax error',
26 r502 => '502 Command unavailable',
27 r221 => "221 Header follows\r\n",
28 r224 => '224 Overview information follows (multi-line)',
29 r225 => "225 Headers follow (multi-line)\r\n",
30 r430 => '430 No article with that message-id',
33 my $ONE_MSGID = qr/\A$MID_EXTRACT\z/;
34 my @OVERVIEW = qw(Subject From Date Message-ID References);
35 my $OVERVIEW_FMT = join(":\r\n", @OVERVIEW, qw(Bytes Lines), '') .
37 my $LIST_HEADERS = join("\r\n", @OVERVIEW,
38 qw(:bytes :lines Xref To Cc)) . "\r\n.";
39 my $CAPABILITIES = <<"";
40 101 Capability list:\r
44 LIST ACTIVE ACTIVE.TIMES NEWSGROUPS OVERVIEW.FMT\r
49 sub do_greet ($) { $_[0]->write($_[0]->{nntpd}->{greet}) };
52 my ($cls, $sock, $nntpd) = @_;
53 (bless { nntpd => $nntpd }, $cls)->greet($sock)
58 my $tot = prototype $cb;
59 my ($nreq, undef) = split(/;/, $tot);
60 $nreq = ($nreq =~ tr/$//) - 1;
61 $tot = ($tot =~ tr/$//) - 1;
62 ($argc <= $tot && $argc >= $nreq);
65 # returns 1 if we can continue, 0 if not due to buffered writes or disconnect
66 sub process_line ($$) {
68 my ($req, @args) = split(/[ \t]+/, $l);
69 return 1 unless defined($req); # skip blank line
70 $req = $self->can('cmd_'.lc($req)) //
71 return $self->write(\"500 command not recognized\r\n");
72 return res($self, r501) unless args_ok($req, scalar @args);
74 my $res = eval { $req->($self, @args) };
76 if ($err && $self->{sock}) {
79 err($self, 'error from: %s (%s)', $l, $err);
80 $res = '503 program fault - command not performed';
82 defined($res) ? res($self, $res) : 0;
85 # The keyword argument is not used (rfc3977 5.2.2)
86 sub cmd_capabilities ($;$) {
87 my ($self, undef) = @_;
88 my $res = $CAPABILITIES;
89 if (!$self->{sock}->can('accept_SSL') &&
90 $self->{nntpd}->{accept_tls}) {
91 $res .= "STARTTLS\r\n";
97 my ($self, $arg) = @_;
98 uc($arg) eq 'READER' ? '201 Posting prohibited' : r501;
101 sub cmd_slave ($) { '202 slave status noted' }
103 sub cmd_xgtitle ($;$) {
104 my ($self, $wildmat) = @_;
105 $self->msg_more("282 list of groups and descriptions follows\r\n");
106 list_newsgroups($self, $wildmat);
109 sub list_overview_fmt ($) { $OVERVIEW_FMT }
111 sub list_headers ($;$) { $LIST_HEADERS }
113 sub list_active_i { # "LIST ACTIVE" and also just "LIST" (no args)
114 my ($self, $groupnames) = @_;
115 my @window = splice(@$groupnames, 0, 100) or return 0;
117 my $groups = $self->{nntpd}->{pi_cfg}->{-by_newsgroup};
118 for my $ngname (@window) {
119 $ibx = $groups->{$ngname} and group_line($self, $ibx);
121 scalar(@$groupnames); # continue if there's more
124 sub list_active ($;$) { # called by cmd_list
125 my ($self, $wildmat) = @_;
126 wildmat2re($wildmat);
127 long_response($self, \&list_active_i, [
128 grep(/$wildmat/, @{$self->{nntpd}->{groupnames}}) ]);
131 sub list_active_times_i {
132 my ($self, $groupnames) = @_;
133 my @window = splice(@$groupnames, 0, 100) or return 0;
134 my $groups = $self->{nntpd}->{pi_cfg}->{-by_newsgroup};
135 for my $ngname (@window) {
136 my $ibx = $groups->{$ngname} or next;
137 my $c = eval { $ibx->uidvalidity } // time;
138 $self->msg_more("$ngname $c <$ibx->{-primary_address}>\r\n");
140 scalar(@$groupnames); # continue if there's more
143 sub list_active_times ($;$) { # called by cmd_list
144 my ($self, $wildmat) = @_;
145 wildmat2re($wildmat);
146 long_response($self, \&list_active_times_i, [
147 grep(/$wildmat/, @{$self->{nntpd}->{groupnames}}) ]);
150 sub list_newsgroups_i {
151 my ($self, $groupnames) = @_;
152 my @window = splice(@$groupnames, 0, 100) or return 0;
153 my $groups = $self->{nntpd}->{pi_cfg}->{-by_newsgroup};
155 for my $ngname (@window) {
156 $ibx = $groups->{$ngname} and
157 $self->msg_more("$ngname ".$ibx->description."\r\n");
159 scalar(@$groupnames); # continue if there's more
162 sub list_newsgroups ($;$) { # called by cmd_list
163 my ($self, $wildmat) = @_;
164 wildmat2re($wildmat);
165 long_response($self, \&list_newsgroups_i, [
166 grep(/$wildmat/, @{$self->{nntpd}->{groupnames}}) ]);
169 # LIST SUBSCRIPTIONS, DISTRIB.PATS are not supported
170 sub cmd_list ($;$$) {
171 my ($self, @args) = @_;
173 my $arg = shift @args;
174 $arg =~ tr/A-Z./a-z_/;
175 my $ret = $arg eq 'active';
177 $arg = $self->can($arg);
178 return r501 unless $arg && args_ok($arg, scalar @args);
179 $self->msg_more("215 information follows\r\n");
180 $arg->($self, @args);
182 $self->msg_more("215 list of newsgroups follows\r\n");
183 long_response($self, \&list_active_i, [ # copy array
184 @{$self->{nntpd}->{groupnames}} ]);
188 sub listgroup_range_i {
189 my ($self, $beg, $end) = @_;
190 my $r = $self->{ibx}->mm(1)->msg_range($beg, $end, 'num');
191 scalar(@$r) or return;
192 $self->msg_more(join('', map { "$_->[0]\r\n" } @$r));
196 sub listgroup_all_i {
197 my ($self, $num) = @_;
198 my $ary = $self->{ibx}->over(1)->ids_after($num);
199 scalar(@$ary) or return;
200 $self->msg_more(join("\r\n", @$ary, ''));
204 sub cmd_listgroup ($;$$) {
205 my ($self, $group, $range) = @_;
206 if (defined $group) {
207 my $res = cmd_group($self, $group);
208 return $res if ($res !~ /\A211 /);
209 $self->msg_more($res .= "\r\n");
211 $self->{ibx} or return '412 no newsgroup selected';
212 if (defined $range) {
213 my $r = get_range($self, $range);
214 return $r unless ref $r;
215 long_response($self, \&listgroup_range_i, @$r);
216 } else { # grab every article number
217 long_response($self, \&listgroup_all_i, \(my $num = 0));
221 sub parse_time ($$;$) {
222 my ($date, $time, $gmt) = @_;
223 my ($hh, $mm, $ss) = unpack('A2A2A2', $time);
225 $gmt =~ /\A(?:UTC|GMT)\z/i or die "GM invalid: $gmt";
228 my ($YYYY, $MM, $DD);
229 if (length($date) == 8) { # RFC 3977 allows YYYYMMDD
230 ($YYYY, $MM, $DD) = unpack('A4A2A2', $date);
231 } else { # legacy clients send YYMMDD
233 ($YY, $MM, $DD) = unpack('A2A2A2', $date);
234 my @now = $gmt ? gmtime : localtime;
235 my $cur_year = $now[5] + 1900;
236 my $cur_cent = int($cur_year / 100) * 100;
237 $YYYY = (($YY + $cur_cent) > $cur_year) ?
238 ($YY + 1900) : ($YY + $cur_cent);
241 timegm($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
243 timelocal($ss, $mm, $hh, $DD, $MM - 1, $YYYY);
247 sub group_line ($$) {
248 my ($self, $ibx) = @_;
249 my ($min, $max) = $ibx->mm(1)->minmax;
250 $self->msg_more("$ibx->{newsgroup} $max $min n\r\n");
254 my ($self, $ts, $i, $groupnames) = @_;
256 my $groups = $self->{nntpd}->{pi_cfg}->{-by_newsgroup};
258 my $ngname = $groupnames->[$$i++] // return;
259 my $ibx = $groups->{$ngname} or next; # expired on reload
260 next unless (eval { $ibx->uidvalidity } // 0) > $ts;
261 group_line($self, $ibx);
266 sub cmd_newgroups ($$$;$$) {
267 my ($self, $date, $time, $gmt, $dists) = @_;
268 my $ts = eval { parse_time($date, $time, $gmt) };
272 $self->msg_more("231 list of new newsgroups follows\r\n");
273 long_response($self, \&newgroups_i, $ts, \(my $i = 0),
274 $self->{nntpd}->{groupnames});
277 sub wildmat2re (;$) {
278 return $_[0] = qr/.*/ if (!defined $_[0] || $_[0] eq '*');
283 $tmp =~ s#(?<!\\)\[(.+)(?<!\\)\]#
285 my $key = sha1_hex($orig . $salt);
286 $orig =~ s/([^\w\-])+/\Q$1/g;
290 my %map = ('*' => '.*', '?' => '.' );
291 $tmp =~ s#(?<!\\)([^\w\\])#$map{$1} || "\Q$1"#ge;
293 $tmp =~ s#([a-f0-9]{40})#
294 my $orig = $keep{$1};
295 defined $orig ? $orig : $1;
298 $_[0] = qr/\A$tmp\z/;
302 return $_[0] = qr/\A\z/ unless defined $_[0];
303 my %map = ('*' => '.*', ',' => '|');
304 $_[0] =~ s!(.)!$map{$1} || "\Q$1"!ge;
305 $_[0] = qr/\A(?:$_[0])\z/;
309 my ($self, $names, $ts, $prev) = @_;
310 my $ngname = $names->[0];
311 if (my $ibx = $self->{nntpd}->{pi_cfg}->{-by_newsgroup}->{$ngname}) {
312 if (my $over = $ibx->over) {
313 my $msgs = $over->query_ts($ts, $$prev);
315 $self->msg_more(join('', map {
318 $$prev = $msgs->[-1]->{num};
319 return 1; # continue on current group
324 if (@$names) { # continue onto next newsgroup
327 } else { # all done, break out of the long_response
332 sub cmd_newnews ($$$$;$$) {
333 my ($self, $newsgroups, $date, $time, $gmt, $dists) = @_;
334 my $ts = eval { parse_time($date, $time, $gmt) };
336 $self->msg_more("230 list of new articles by message-id follows\r\n");
337 my ($keep, $skip) = split(/!/, $newsgroups, 2);
340 my @names = grep(!/$skip/, grep(/$keep/,
341 @{$self->{nntpd}->{groupnames}}));
342 return '.' unless scalar(@names);
344 long_response($self, \&newnews_i, \@names, $ts, \$prev);
348 my ($self, $group) = @_;
349 my $nntpd = $self->{nntpd};
350 my $ibx = $nntpd->{pi_cfg}->{-by_newsgroup}->{$group} or
351 return '411 no such news group';
355 my ($min, $max) = $ibx->mm(1)->minmax;
356 $self->{article} = $min;
357 my $est_size = $max - $min;
358 "211 $est_size $min $max $group";
361 sub article_adj ($$) {
362 my ($self, $off) = @_;
363 my $ibx = $self->{ibx} or return '412 no newsgroup selected';
365 my $n = $self->{article};
366 defined $n or return '420 no current article has been selected';
369 my $mid = $ibx->mm(1)->mid_for($n) // do {
370 $n = $off > 0 ? 'next' : 'previous';
371 return "421 no $n article in this group";
373 $self->{article} = $n;
374 "223 $n <$mid> article retrieved - request text separately";
377 sub cmd_next ($) { article_adj($_[0], 1) }
378 sub cmd_last ($) { article_adj($_[0], -1) }
380 # We want to encourage using email and CC-ing everybody involved to avoid
381 # the single-point-of-failure a single server provides.
384 my $ibx = $self->{ibx};
385 $ibx ? "440 mailto:$ibx->{-primary_address} to post"
386 : '440 posting not allowed'
391 $self->write(\"205 closing connection - goodbye!\r\n");
396 sub xref_by_tc ($$$) {
397 my ($xref, $pi_cfg, $smsg) = @_;
398 my $by_addr = $pi_cfg->{-by_addr};
399 my $mid = $smsg->{mid};
400 for my $f (qw(to cc)) {
402 $by_addr->{lc($_)} // ()
403 } (PublicInbox::Address::emails($smsg->{$f} // ''));
404 for my $ibx (@ibxs) {
405 $xref->{$ibx->{newsgroup}} //=
406 $ibx->mm(1)->num_for($mid);
412 my ($self, $cur_ibx, $smsg) = @_;
413 my $nntpd = $self->{nntpd};
414 my $cur_ng = $cur_ibx->{newsgroup};
416 if (my $ALL = $nntpd->{pi_cfg}->ALL) {
417 $xref = $ALL->nntp_xref_for($cur_ibx, $smsg);
418 xref_by_tc($xref, $nntpd->{pi_cfg}, $smsg);
420 $xref = { $cur_ng => $smsg->{num} };
421 my $mid = $smsg->{mid};
422 for my $ibx (values %{$nntpd->{pi_cfg}->{-by_newsgroup}}) {
423 $xref->{$ibx->{newsgroup}} //=
424 $ibx->mm(1)->num_for($mid);
427 my $ret = "$nntpd->{servername} $cur_ng:".delete($xref->{$cur_ng});
428 for my $ng (sort keys %$xref) {
429 my $num = $xref->{$ng} // next;
435 sub set_nntp_headers ($$) {
436 my ($hdr, $smsg) = @_;
437 my ($mid) = $smsg->{mid};
439 # leafnode (and maybe other NNTP clients) have trouble dealing
440 # with v2 messages which have multiple Message-IDs (either due
441 # to our own content-based dedupe or buggy git-send-email versions).
442 my @mids = $hdr->header_raw('Message-ID');
443 if (scalar(@mids) > 1) {
445 $hdr->header_set('Message-ID', $mid0);
446 my @alt = $hdr->header_raw('X-Alt-Message-ID');
447 my %seen = map { $_ => 1 } (@alt, $mid0);
448 push(@alt, grep { !$seen{$_}++ } @mids);
449 $hdr->header_set('X-Alt-Message-ID', @alt);
452 # clobber some existing headers
453 my $ibx = $smsg->{-ibx};
454 my $xref = xref($smsg->{nntp}, $ibx, $smsg);
455 $hdr->header_set('Xref', $xref);
458 my ($server_name, $newsgroups) = split(/ /, $xref, 2);
459 $newsgroups =~ s/:[0-9]+\b//g; # drop NNTP article numbers
460 $newsgroups =~ tr/ /,/;
461 $hdr->header_set('Newsgroups', $newsgroups);
463 # *something* here is required for leafnode, try to follow
465 $hdr->header_set('Path', $server_name . '!not-for-mail');
468 sub art_lookup ($$$) {
469 my ($self, $art, $code) = @_;
473 if ($art =~ /\A[0-9]+\z/) {
474 $err = '423 no such article number in this group';
477 } elsif ($art =~ $ONE_MSGID) {
478 ($ibx, $n) = mid_lookup($self, $1);
485 $err = '420 no current article has been selected';
486 $n = $self->{article} // return $err;
488 $ibx = $self->{ibx} or
489 return '412 no newsgroup has been selected';
492 my $smsg = $ibx->over(1)->get_art($n) or return $err;
493 $smsg->{-ibx} = $ibx;
494 if ($code == 223) { # STAT
496 "223 $n <$smsg->{mid}> article retrieved - " .
497 "request text separately";
498 } else { # HEAD | BODY | ARTICLE
499 $smsg->{nntp} = $self;
500 $smsg->{nntp_code} = $code;
501 set_art($self, $art);
502 # this dereferences to `undef'
503 ${ibx_async_cat($ibx, $smsg->{blob}, \&blob_cb, $smsg)};
507 sub msg_body_write ($$) {
508 my ($self, $msg) = @_;
510 # these can momentarily double the memory consumption :<
511 $$msg =~ s/^\./../smg;
512 $$msg =~ s/(?<!\r)\n/\r\n/sg; # Alpine barfs without this
513 $$msg .= "\r\n" unless $$msg =~ /\r\n\z/s;
514 $self->msg_more($$msg);
518 my ($self, $art) = @_;
519 $self->{article} = $art if defined $art && $art =~ /\A[0-9]+\z/;
522 sub msg_hdr_write ($$) {
523 my ($eml, $smsg) = @_;
524 set_nntp_headers($eml, $smsg);
526 my $hdr = $eml->{hdr} // \(my $x = '');
527 # fixup old bug from import (pre-a0c07cba0e5d8b6a)
528 $$hdr =~ s/\A[\r\n]*From [^\r\n]*\r?\n//s;
529 $$hdr =~ s/(?<!\r)\n/\r\n/sg; # Alpine barfs without this
531 # for leafnode compatibility, we need to ensure Message-ID headers
532 # are only a single line.
533 $$hdr =~ s/^(Message-ID:)[ \t]*\r\n[ \t]+([^\r]+)\r\n/$1 $2\r\n/igsm;
534 $smsg->{nntp}->msg_more($$hdr);
537 sub blob_cb { # called by git->cat_async via ibx_async_cat
538 my ($bref, $oid, $type, $size, $smsg) = @_;
539 my $self = $smsg->{nntp};
540 my $code = $smsg->{nntp_code};
541 if (!defined($oid)) {
542 # it's possible to have TOCTOU if an admin runs
543 # public-inbox-(edit|purge), just move onto the next message
544 warn "E: $smsg->{blob} missing in $smsg->{-ibx}->{inboxdir}\n";
545 return $self->requeue;
546 } elsif ($smsg->{blob} ne $oid) {
548 die "BUG: $smsg->{blob} != $oid";
550 my $r = "$code $smsg->{num} <$smsg->{mid}> article retrieved - ";
551 my $eml = PublicInbox::Eml->new($bref);
553 $self->msg_more($r .= "head and body follow\r\n");
554 msg_hdr_write($eml, $smsg);
555 $self->msg_more("\r\n");
556 msg_body_write($self, $bref);
557 } elsif ($code == 221) {
558 $self->msg_more($r .= "head follows\r\n");
559 msg_hdr_write($eml, $smsg);
560 } elsif ($code == 222) {
561 $self->msg_more($r .= "body follows\r\n");
562 msg_body_write($self, $bref);
565 die "BUG: bad code: $r";
567 $self->write(\".\r\n"); # flushes (includes ->zflush)
571 sub cmd_article ($;$) {
572 my ($self, $art) = @_;
573 art_lookup($self, $art, 220);
577 my ($self, $art) = @_;
578 art_lookup($self, $art, 221);
582 my ($self, $art) = @_;
583 art_lookup($self, $art, 222);
587 my ($self, $art) = @_;
588 art_lookup($self, $art, 223); # art may be msgid
591 sub cmd_ihave ($) { '435 article not wanted - do not send it' }
593 sub cmd_date ($) { '111 '.strftime('%Y%m%d%H%M%S', gmtime(time)) }
597 $self->msg_more("100 help text follows\r\n");
602 my ($self, $range) = @_;
603 my $ibx = $self->{ibx} or return '412 no news group has been selected';
604 defined $range or return '420 No article(s) selected';
606 my ($min, $max) = $ibx->mm(1)->minmax;
607 if ($range =~ /\A([0-9]+)\z/) {
609 } elsif ($range =~ /\A([0-9]+)-\z/) {
610 ($beg, $end) = ($1, $max);
611 } elsif ($range =~ /\A([0-9]+)-([0-9]+)\z/) {
612 ($beg, $end) = ($1, $2);
616 $beg = $min if ($beg < $min);
617 $end = $max if ($end > $max);
618 return '420 No article(s) selected' if ($beg > $end);
624 # wbuf is unset or empty, here; {long} may add to it
625 my ($fd, $cb, $t0, @args) = @{$self->{long_cb}};
626 my $more = eval { $cb->($self, @args) };
627 if ($@ || !$self->{sock}) { # something bad happened...
628 delete $self->{long_cb};
629 my $elapsed = now() - $t0;
632 "%s during long response[$fd] - %0.6f",
635 out($self, " deferred[$fd] aborted - %0.6f", $elapsed);
637 } elsif ($more) { # $self->{wbuf}:
638 # COMPRESS users all share the same DEFLATE context.
639 # Flush it here to ensure clients don't see
643 # no recursion, schedule another call ASAP, but only after
644 # all pending writes are done. autovivify wbuf:
645 my $new_size = push(@{$self->{wbuf}}, \&long_step);
647 # wbuf may be populated by $cb, no need to rearm if so:
648 $self->requeue if $new_size == 1;
650 delete $self->{long_cb};
651 $self->write(\".\r\n");
652 my $elapsed = now() - $t0;
653 my $fd = fileno($self->{sock});
654 out($self, " deferred[$fd] done - %0.6f", $elapsed);
655 my $wbuf = $self->{wbuf}; # do NOT autovivify
656 $self->requeue unless $wbuf && @$wbuf;
660 sub long_response ($$;@) {
661 my ($self, $cb, @args) = @_; # cb returns true if more, false if done
663 my $sock = $self->{sock} or return;
664 # make sure we disable reading during a long response,
665 # clients should not be sending us stuff and making us do more
666 # work while we are stream a response to them
667 $self->{long_cb} = [ fileno($sock), $cb, now(), @args ];
668 long_step($self); # kick off!
672 sub hdr_msgid_range_i {
673 my ($self, $beg, $end) = @_;
674 my $r = $self->{ibx}->mm(1)->msg_range($beg, $end);
676 $self->msg_more(join('', map { "$_->[0] <$_->[1]>\r\n" } @$r));
680 sub hdr_message_id ($$$) { # optimize XHDR Message-ID [range] for slrnpull.
681 my ($self, $xhdr, $range) = @_;
683 if (defined $range && $range =~ $ONE_MSGID) {
684 my ($ibx, $n) = mid_lookup($self, $1);
685 return r430 unless $n;
686 hdr_mid_response($self, $xhdr, $ibx, $n, $range, $range);
687 } else { # numeric range
688 $range = $self->{article} unless defined $range;
689 my $r = get_range($self, $range);
690 return $r unless ref $r;
691 $self->msg_more($xhdr ? r221 : r225);
692 long_response($self, \&hdr_msgid_range_i, @$r);
696 sub mid_lookup ($$) {
697 my ($self, $mid) = @_;
698 my $cur_ibx = $self->{ibx};
700 my $n = $cur_ibx->mm(1)->num_for($mid);
701 return ($cur_ibx, $n) if defined $n;
703 my $pi_cfg = $self->{nntpd}->{pi_cfg};
704 if (my $ALL = $pi_cfg->ALL) {
706 while (my $smsg = $ALL->over->next_by_mid($mid, \$id, \$prev)) {
707 my $xr3 = $ALL->over->get_xref3($smsg->{num});
708 if (my @x = grep(/:$smsg->{blob}\z/, @$xr3)) {
709 my ($ngname, $xnum) = split(/:/, $x[0]);
710 my $ibx = $pi_cfg->{-by_newsgroup}->{$ngname};
711 return ($ibx, $xnum) if $ibx;
712 # fall through to trying all xref3s
715 W: xref3 missing for <$mid> ($smsg->{blob}) in $ALL->{topdir}, -extindex bug?
720 my ($ngname, $xnum) = split(/:/, $x);
721 my $ibx = $pi_cfg->{-by_newsgroup}->{$ngname};
722 return ($ibx, $xnum) if $ibx;
723 warn "W: `$ngname' does not exist for #$xnum\n";
726 # no warning here, $mid is just invalid
727 } else { # slow path for non-ALL users
728 for my $ibx (values %{$pi_cfg->{-by_newsgroup}}) {
729 next if defined $cur_ibx && $ibx eq $cur_ibx;
730 my $n = $ibx->mm(1)->num_for($mid);
731 return ($ibx, $n) if defined $n;
738 my ($self, $beg, $end) = @_;
739 my $ibx = $self->{ibx};
740 my $msgs = $ibx->over(1)->query_xover($$beg, $end);
741 scalar(@$msgs) or return;
742 $$beg = $msgs->[-1]->{num} + 1;
743 $self->msg_more(join('', map {
744 "$_->{num} ".xref($self, $ibx, $_) . "\r\n";
749 sub hdr_xref ($$$) { # optimize XHDR Xref [range] for rtin
750 my ($self, $xhdr, $range) = @_;
752 if (defined $range && $range =~ $ONE_MSGID) {
754 my ($ibx, $n) = mid_lookup($self, $mid);
755 return r430 unless $n;
756 my $smsg = $ibx->over(1)->get_art($n) or return;
757 hdr_mid_response($self, $xhdr, $ibx, $n, $range,
758 xref($self, $ibx, $smsg));
759 } else { # numeric range
760 $range = $self->{article} unless defined $range;
761 my $r = get_range($self, $range);
762 return $r unless ref $r;
763 $self->msg_more($xhdr ? r221 : r225);
764 long_response($self, \&xref_range_i, @$r);
768 sub over_header_for {
769 my ($ibx, $num, $field) = @_;
770 my $smsg = $ibx->over(1)->get_art($num) or return;
771 return PublicInbox::Smsg::date($smsg) if $field eq 'date';
776 my ($self, $beg, $end, $field) = @_;
777 my $msgs = $self->{ibx}->over(1)->query_xover($$beg, $end);
778 scalar(@$msgs) or return;
781 # ->{$field} is faster than ->$field invocations, so favor that.
782 if ($field eq 'date') {
784 $tmp .= "$s->{num} ".PublicInbox::Smsg::date($s)."\r\n"
788 $tmp .= "$s->{num} $s->{$field}\r\n";
792 $self->msg_more($tmp);
793 $$beg = $msgs->[-1]->{num} + 1;
796 sub hdr_smsg ($$$$) {
797 my ($self, $xhdr, $field, $range) = @_;
798 if (defined $range && $range =~ $ONE_MSGID) {
799 my ($ibx, $n) = mid_lookup($self, $1);
800 return r430 unless defined $n;
801 my $v = over_header_for($ibx, $n, $field);
802 hdr_mid_response($self, $xhdr, $ibx, $n, $range, $v);
803 } else { # numeric range
804 $range = $self->{article} unless defined $range;
805 my $r = get_range($self, $range);
806 return $r unless ref $r;
807 $self->msg_more($xhdr ? r221 : r225);
808 long_response($self, \&smsg_range_i, @$r, $field);
813 my ($self, $xhdr, $header, $range) = @_;
814 my $sub = lc $header;
815 if ($sub eq 'message-id') {
816 hdr_message_id($self, $xhdr, $range);
817 } elsif ($sub eq 'xref') {
818 hdr_xref($self, $xhdr, $range);
819 } elsif ($sub =~ /\A(?:subject|references|date|from|to|cc|
821 hdr_smsg($self, $xhdr, $sub, $range);
822 } elsif ($sub =~ /\A:(bytes|lines)\z/) {
823 hdr_smsg($self, $xhdr, $1, $range);
825 $xhdr ? (r221 . '.') : "503 HDR not permitted on $header";
831 my ($self, $header, $range) = @_;
832 do_hdr($self, 0, $header, $range);
836 sub cmd_xhdr ($$;$) {
837 my ($self, $header, $range) = @_;
838 do_hdr($self, 1, $header, $range);
841 sub hdr_mid_prefix ($$$$$) {
842 my ($self, $xhdr, $ibx, $n, $mid) = @_;
843 return $mid if $xhdr;
845 # HDR for RFC 3977 users
846 if (my $cur_ibx = $self->{ibx}) {
847 ($cur_ibx eq $ibx) ? $n : '0';
853 sub hdr_mid_response ($$$$$$) {
854 my ($self, $xhdr, $ibx, $n, $mid, $v) = @_;
855 $self->write(($xhdr ? r221.$mid :
856 r225.hdr_mid_prefix($self, $xhdr, $ibx, $n, $mid)) .
862 my ($self, $beg, $end) = @_;
863 my $h = over_header_for($self->{ibx}, $$beg, 'references');
864 $self->msg_more("$$beg $h\r\n") if defined($h);
868 sub cmd_xrover ($;$) {
869 my ($self, $range) = @_;
870 my $ibx = $self->{ibx} or return '412 no newsgroup selected';
871 (defined $range && $range =~ /[<>]/) and
872 return '420 No article(s) selected'; # no message IDs
874 $range = $self->{article} unless defined $range;
875 my $r = get_range($self, $range);
876 return $r unless ref $r;
877 $self->msg_more("224 Overview information follows\r\n");
878 long_response($self, \&xrover_i, @$r);
881 sub over_line ($$$) {
882 my ($self, $ibx, $smsg) = @_;
883 # n.b. field access and procedural calls can be
884 # 10%-15% faster than OO method calls:
885 my $s = join("\t", $smsg->{num},
888 PublicInbox::Smsg::date($smsg),
893 "Xref: " . xref($self, $ibx, $smsg));
899 my ($self, $range) = @_;
900 if ($range && $range =~ $ONE_MSGID) {
901 my ($ibx, $n) = mid_lookup($self, $1);
902 defined $n or return r430;
903 my $smsg = $ibx->over(1)->get_art($n) or return r430;
905 "224 Overview information follows (multi-line)\r\n");
907 # Only set article number column if it's the current group
909 my $cur_ibx = $self->{ibx};
910 if (!$cur_ibx || $cur_ibx ne $ibx) {
911 # set {-orig_num} for nntp_xref_for
912 $smsg->{-orig_num} = $smsg->{num};
915 $self->msg_more(over_line($self, $ibx, $smsg));
918 cmd_xover($self, $range);
923 my ($self, $beg, $end) = @_;
924 my $ibx = $self->{ibx};
925 my $msgs = $ibx->over(1)->query_xover($$beg, $end);
926 my $nr = scalar @$msgs or return;
929 $self->msg_more(join('', map {
930 over_line($self, $ibx, $_);
932 $$beg = $msgs->[-1]->{num} + 1;
935 sub cmd_xover ($;$) {
936 my ($self, $range) = @_;
937 $range = $self->{article} unless defined $range;
938 my $r = get_range($self, $range);
939 return $r unless ref $r;
940 my ($beg, $end) = @$r;
942 "224 Overview information follows for $$beg to $end\r\n");
943 long_response($self, \&xover_i, @$r);
946 sub compressed { undef }
948 sub cmd_starttls ($) {
950 my $sock = $self->{sock} or return;
952 return r502 if ($sock->can('accept_SSL') || $self->compressed);
953 my $opt = $self->{nntpd}->{accept_tls} or
954 return '580 can not initiate TLS negotiation';
955 $self->write(\"382 Continue with TLS negotiation\r\n");
956 $self->{sock} = IO::Socket::SSL->start_SSL($sock, %$opt);
957 $self->requeue if PublicInbox::DS::accept_tls_step($self);
962 sub cmd_compress ($$) {
963 my ($self, $alg) = @_;
964 return '503 Only DEFLATE is supported' if uc($alg) ne 'DEFLATE';
965 return r502 if $self->compressed;
966 PublicInbox::NNTPdeflate->enable($self);
972 my ($self, $mid) = @_;
973 return r501 unless $mid =~ $ONE_MSGID;
976 my $pi_cfg = $self->{nntpd}->{pi_cfg};
977 my $groups = $pi_cfg->{-by_newsgroup};
978 if (my $ALL = $pi_cfg->ALL) {
979 my ($id, $prev, %seen);
980 while (my $smsg = $ALL->over->next_by_mid($mid, \$id, \$prev)) {
981 my $xr3 = $ALL->over->get_xref3($smsg->{num});
983 my ($ngname, $n) = split(/:/, $x);
985 if ($groups->{$ngname} && !$seen{$x}++) {
990 } else { # slow path, no point in using long_response
991 for my $ibx (values %$groups) {
992 my $n = $ibx->mm(1)->num_for($mid) // next;
993 push @paths, "$ibx->{newsgroup}/$n";
996 return '430 no such article on server' unless @paths;
997 '223 '.join(' ', sort(@paths));
1000 sub res ($$) { do_write($_[0], $_[1] . "\r\n") }
1004 my $done = $self->write(\($_[1]));
1005 return 0 unless $self->{sock};
1011 my ($self, $fmt, @args) = @_;
1012 printf { $self->{nntpd}->{err} } $fmt."\n", @args;
1016 my ($self, $fmt, @args) = @_;
1017 printf { $self->{nntpd}->{out} } $fmt."\n", @args;
1020 # callback used by PublicInbox::DS for any (e)poll (in/out/hup/err)
1024 return unless $self->flush_write && $self->{sock} && !$self->{long_cb};
1026 # only read more requests if we've drained the write buffer,
1027 # otherwise we can be buffering infinitely w/o backpressure
1029 my $rbuf = $self->{rbuf} // \(my $x = '');
1030 my $line = index($$rbuf, "\n");
1032 return $self->close if length($$rbuf) >= LINE_MAX;
1033 $self->do_read($rbuf, LINE_MAX, length($$rbuf)) or return;
1034 $line = index($$rbuf, "\n");
1036 $line = substr($$rbuf, 0, $line + 1, '');
1037 $line =~ s/\r?\n\z//s;
1038 return $self->close if $line =~ /[[:cntrl:]]/s;
1041 my $fd = fileno($self->{sock});
1042 my $r = eval { process_line($self, $line) };
1043 my $pending = $self->{wbuf} ? ' pending' : '';
1044 out($self, "[$fd] %s - %0.6f$pending", $line, now() - $t0);
1045 return $self->close if $r < 0;
1046 $self->rbuf_idle($rbuf);
1048 # maybe there's more pipelined data, or we'll have
1049 # to register it for socket-readiness notifications
1050 $self->requeue unless $pending;
1053 sub busy { # for graceful shutdown in PublicInbox::Daemon:
1055 defined($self->{rbuf}) || defined($self->{wbuf})