100 lines
3.0 KiB
Perl
100 lines
3.0 KiB
Perl
#!perl -w
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=head1 NAME
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rcpt_regexp - check recipients against a list of regular expressions
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=head1 DESCRIPTION
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B<rcpt_regexp> reads a list of regular expressions, return codes and comments
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from the I<rcpt_regexp> config file. If the regular expression does NOT match
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I<m#^(/.*/)$#>, it is used as a string which is compared with I<eq lc($rcpt)>.
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The recipient addresses are checked against this list, and if the first
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matches, the return code from that line and the comment are returned to
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qpsmtpd. Return code can be any valid plugin return code from
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L<Qpsmtpd::Constants>. Matching is always done case insenstive.
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=head1 CONFIG FILE
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The config file I<rcpt_regexp> contains lines with a perl RE, including the
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"/"s, a return code and a comment, which will be returned to the sender, if
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the code is not OK or DECLINED. Example:
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# rcpt_regexp - config for rcpt_regexp plugin
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me@myhost.org OK Accepting mail
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/^user\d+\@doma\.in$/ OK Accepting mail
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info@myhost.com DENY User not found.
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/^unused\@.*/ DENY User not found.
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/^.*$/ DECLINED Fall through to next rcpt plugin
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=head1 NOTE
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The C<rcpt_regexp> config file should be writeable by trusted users only: the
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regexes are compiled with I<eval()>.
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=head1 COPYRIGHT AND LICENSE
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Copyright (c) 2005 Hanno Hecker
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This plugin is licensed under the same terms as the qpsmtpd package itself.
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Please see the LICENSE file included with qpsmtpd for details.
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=cut
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use Qpsmtpd::Constants;
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sub hook_rcpt {
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my ($self, $transaction, $recipient) = @_;
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return DECLINED
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unless $recipient->host && $recipient->user;
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my $rcpt = lc $recipient->user . '@' . $recipient->host;
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my ($re, $const, $comment, $str, $ok, $err);
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foreach ($self->qp->config("rcpt_regexp")) {
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s/^\s*//;
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($re, $const, $comment) = split /\s+/, $_, 3;
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$str = undef;
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if ($re =~ m#^/(.*)/$#) {
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$re = $1;
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$ok = eval { $re = qr/$re/i; };
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if ($@) {
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($err = $@) =~ s/\s*at \S+ line \d+\.\s*$//;
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$self->log(LOGWARN, "REGEXP '$re' not valid: $err");
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next;
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}
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$re = $ok;
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}
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else {
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$str = lc $re;
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}
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unless (defined $const) {
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$self->(LOGWARN, "rcpt_regexp - no return code");
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next;
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}
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$ok = $const;
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$const = Qpsmtpd::Constants::return_code($const);
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unless (defined $const) {
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$self->log(LOGWARN,
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"rcpt_regexp - '$ok' is not a valid "
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. "constant, ignoring this line"
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);
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next;
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}
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if (defined $str) {
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next unless $str eq $rcpt;
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$self->log(LOGDEBUG, "String $str matched $rcpt, returning $ok");
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}
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else {
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next unless $rcpt =~ $re;
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$self->log(LOGDEBUG, "RE $re matched $rcpt, returning $ok");
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}
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return $const, $comment;
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}
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return DECLINED;
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}
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