require PublicInbox::EvCleanup;
use Email::Simple;
use POSIX qw(strftime);
-PublicInbox::DS->import(qw(now msg_more));
+PublicInbox::DS->import(qw(now));
use Digest::SHA qw(sha1_hex);
use Time::Local qw(timegm timelocal);
use constant {
+ LINE_MAX => 512, # RFC 977 section 2.3
r501 => '501 command syntax error',
+ r502 => '502 Command unavailable',
r221 => '221 Header follows',
r224 => '224 Overview information follows (multi-line)',
r225 => '225 Headers follow (multi-line)',
my $OVERVIEW_FMT = join(":\r\n", @OVERVIEW, qw(Bytes Lines)) . ":\r\n";
my $LIST_HEADERS = join("\r\n", @OVERVIEW,
qw(:bytes :lines Xref To Cc)) . "\r\n";
-
-# disable commands with easy DoS potential:
-my %DISABLED; # = map { $_ => 1 } qw(xover list_overview_fmt newnews xhdr);
-
+my $CAPABILITIES = <<"";
+101 Capability list:\r
+VERSION 2\r
+READER\r
+NEWNEWS\r
+LIST ACTIVE ACTIVE.TIMES NEWSGROUPS OVERVIEW.FMT\r
+HDR\r
+OVER\r
+
+my $have_deflate;
my $EXPMAP; # fd -> [ idle_time, $self ]
my $expt;
our $EXPTIME = 180; # 3 minutes
my $ev = EPOLLIN;
my $wbuf;
if (ref($sock) eq 'IO::Socket::SSL' && !$sock->accept_SSL) {
- $ev = PublicInbox::TLS::epollbit() or return CORE::close($sock);
+ return CORE::close($sock) if $! != EAGAIN;
+ $ev = PublicInbox::TLS::epollbit();
$wbuf = [ \&PublicInbox::DS::accept_tls_step, \&greet ];
}
$self->SUPER::new($sock, $ev | EPOLLONESHOT);
my ($self, $l) = @_;
my ($req, @args) = split(/[ \t]/, $l);
return 1 unless defined($req); # skip blank line
- $req = lc($req);
$req = eval {
no strict 'refs';
- $req = $DISABLED{$req} ? undef : *{'cmd_'.$req}{CODE};
+ *{'cmd_'.lc($req)}{CODE};
};
return res($self, '500 command not recognized') unless $req;
return res($self, r501) unless args_ok($req, scalar @args);
res($self, $res);
}
+# The keyword argument is not used (rfc3977 5.2.2)
+sub cmd_capabilities ($;$) {
+ my ($self, undef) = @_;
+ my $res = $CAPABILITIES;
+ if (ref($self->{sock}) ne 'IO::Socket::SSL' &&
+ $self->{nntpd}->{accept_tls}) {
+ $res .= "STARTTLS\r\n";
+ }
+ $res .= '.';
+}
+
sub cmd_mode ($$) {
my ($self, $arg) = @_;
$arg = uc $arg;
sub list_overview_fmt ($) {
my ($self) = @_;
- msg_more($self, $OVERVIEW_FMT);
+ $self->msg_more($OVERVIEW_FMT);
}
sub list_headers ($;$) {
my ($self) = @_;
- msg_more($self, $LIST_HEADERS);
+ $self->msg_more($LIST_HEADERS);
}
sub list_active ($;$) {
my $arg = shift @args;
$arg =~ tr/A-Z./a-z_/;
$arg = "list_$arg";
- return r501 if $DISABLED{$arg};
$arg = eval {
no strict 'refs';
found:
my $smsg = $ng->over->get_art($n) or return $err;
my $msg = $ng->msg_by_smsg($smsg) or return $err;
- my $s = Email::Simple->new($msg);
- if ($set_headers) {
- set_nntp_headers($self, $s->header_obj, $ng, $n, $mid);
- # must be last
- $s->body_set('') if ($set_headers == 2);
- }
- [ $n, $mid, $s, $smsg->bytes, $smsg->lines, $ng ];
+ # Email::Simple->new will modify $msg in-place as documented
+ # in its manpage, so what's left is the body and we won't need
+ # to call Email::Simple::body(), later
+ my $hdr = Email::Simple->new($msg)->header_obj;
+ set_nntp_headers($self, $hdr, $ng, $n, $mid) if $set_headers;
+ [ $n, $mid, $msg, $hdr ];
}
-sub simple_body_write ($$) {
- my ($self, $s) = @_;
- my $body = $s->body;
- $s->body_set('');
- $body =~ s/^\./../smg;
- $body =~ s/(?<!\r)\n/\r\n/sg;
- msg_more($self, $body);
- msg_more($self, "\r\n") unless $body =~ /\r\n\z/s;
+sub msg_body_write ($$) {
+ my ($self, $msg) = @_;
+
+ # these can momentarily double the memory consumption :<
+ $$msg =~ s/^\./../smg;
+ $$msg =~ s/(?<!\r)\n/\r\n/sg; # Alpine barfs without this
+ $$msg .= "\r\n" unless $$msg =~ /\r\n\z/s;
+ $self->msg_more($$msg);
'.'
}
$self->{article} = $art if defined $art && $art =~ /\A[0-9]+\z/;
}
-sub _header ($) {
- my $hdr = $_[0]->header_obj->as_string;
+sub msg_hdr_write ($$$) {
+ my ($self, $hdr, $body_follows) = @_;
+ $hdr = $hdr->as_string;
utf8::encode($hdr);
- $hdr =~ s/(?<!\r)\n/\r\n/sg;
+ $hdr =~ s/(?<!\r)\n/\r\n/sg; # Alpine barfs without this
# for leafnode compatibility, we need to ensure Message-ID headers
# are only a single line. We can't subclass Email::Simple::Header
# and override _default_fold_at in here, either; since that won't
# affect messages already in the archive.
$hdr =~ s/^(Message-ID:)[ \t]*\r\n[ \t]+([^\r]+)\r\n/$1 $2\r\n/igsm;
-
- $hdr
+ $hdr .= "\r\n" if $body_follows;
+ $self->msg_more($hdr);
}
sub cmd_article ($;$) {
my ($self, $art) = @_;
my $r = art_lookup($self, $art, 1);
return $r unless ref $r;
- my ($n, $mid, $s) = @$r;
+ my ($n, $mid, $msg, $hdr) = @$r;
set_art($self, $art);
more($self, "220 $n <$mid> article retrieved - head and body follow");
- msg_more($self, _header($s));
- msg_more($self, "\r\n");
- simple_body_write($self, $s);
+ msg_hdr_write($self, $hdr, 1);
+ msg_body_write($self, $msg);
}
sub cmd_head ($;$) {
my ($self, $art) = @_;
my $r = art_lookup($self, $art, 2);
return $r unless ref $r;
- my ($n, $mid, $s) = @$r;
+ my ($n, $mid, undef, $hdr) = @$r;
set_art($self, $art);
more($self, "221 $n <$mid> article retrieved - head follows");
- msg_more($self, _header($s));
+ msg_hdr_write($self, $hdr, 0);
'.'
}
my ($self, $art) = @_;
my $r = art_lookup($self, $art, 0);
return $r unless ref $r;
- my ($n, $mid, $s) = @$r;
+ my ($n, $mid, $msg) = @$r;
set_art($self, $art);
more($self, "222 $n <$mid> article retrieved - body follows");
- simple_body_write($self, $s);
+ msg_body_write($self, $msg);
}
sub cmd_stat ($;$) {
my ($self, $art) = @_;
my $r = art_lookup($self, $art, 0);
return $r unless ref $r;
- my ($n, $mid, undef) = @$r;
+ my ($n, $mid) = @$r;
set_art($self, $art);
"223 $n <$mid> article retrieved - request text separately";
}
$tmp .= $s->{num} . ' ' . $s->$field . "\r\n";
}
utf8::encode($tmp);
- msg_more($self, $tmp);
+ $self->msg_more($tmp);
$cur = $msgs->[-1]->{num} + 1;
});
}
}
sub hdr_mid_response ($$$$$$) {
- my ($self, $xhdr, $ng, $n, $mid, $v) = @_; # r: art_lookup result
+ my ($self, $xhdr, $ng, $n, $mid, $v) = @_;
my $res = '';
if ($xhdr) {
$res .= r221 . "\r\n";
});
}
+sub compressed { undef }
+
sub cmd_starttls ($) {
my ($self) = @_;
my $sock = $self->{sock} or return;
# RFC 4642 2.2.1
- (ref($sock) eq 'IO::Socket::SSL') and return '502 Command unavailable';
+ return r502 if (ref($sock) eq 'IO::Socket::SSL' || $self->compressed);
my $opt = $self->{nntpd}->{accept_tls} or
return '580 can not initiate TLS negotiation';
res($self, '382 Continue with TLS negotiation');
undef;
}
+# RFC 8054
+sub cmd_compress ($$) {
+ my ($self, $alg) = @_;
+ return '503 Only the DEFLATE is supported' if uc($alg) ne 'DEFLATE';
+ return r502 if $self->compressed || !$have_deflate;
+ res($self, '206 Compression active');
+ PublicInbox::NNTPdeflate->enable($self);
+ $self->requeue;
+ undef
+}
+
sub cmd_xpath ($$) {
my ($self, $mid) = @_;
return r501 unless $mid =~ /\A<(.+)>\z/;
sub res ($$) { do_write($_[0], $_[1] . "\r\n") }
-sub more ($$) { msg_more($_[0], $_[1] . "\r\n") }
+sub more ($$) { $_[0]->msg_more($_[1] . "\r\n") }
sub do_write ($$) {
my $self = $_[0];
# only read more requests if we've drained the write buffer,
# otherwise we can be buffering infinitely w/o backpressure
- use constant LINE_MAX => 512; # RFC 977 section 2.3
my $rbuf = $self->{rbuf} // (\(my $x = ''));
my $r = 1;
($self->{rbuf} || $self->{wbuf} || not_idle_long($self, $now));
}
+# this is an import to prevent "perl -c" from complaining about fields
+sub import {
+ $have_deflate = eval { require PublicInbox::NNTPdeflate } and
+ $CAPABILITIES .= "COMPRESS DEFLATE\r\n";
+}
+
1;