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# <@LICENSE>
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to you under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at:
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# </@LICENSE>
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=head1 NAME
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URIDNSBL - look up URLs against DNS blocklists
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=head1 SYNOPSIS
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loadplugin Mail::SpamAssassin::Plugin::URIDNSBL
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uridnsbl URIBL_SBLXBL sbl-xbl.spamhaus.org. TXT
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=head1 DESCRIPTION
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This works by analysing message text and HTML for URLs, extracting the
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domain names from those, querying their NS records in DNS, resolving
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the hostnames used therein, and querying various DNS blocklists for
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those IP addresses. This is quite effective.
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=head1 USER SETTINGS
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=over 4
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=item skip_uribl_checks ( 0 | 1 ) (default: 0)
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Turning on the skip_uribl_checks setting will disable the URIDNSBL plugin.
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By default, SpamAssassin will run URI DNSBL checks. Individual URI blocklists
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may be disabled selectively by setting a score of a corresponding rule to 0
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or through the uridnsbl_skip_domain parameter.
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See also a related configuration parameter skip_rbl_checks,
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which controls the DNSEval plugin (documented in the Conf man page).
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=back
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=over 4
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=item uridnsbl_skip_domain domain1 domain2 ...
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Specify a domain, or a number of domains, which should be skipped for the
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URIBL checks. This is very useful to specify very common domains which are
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not going to be listed in URIBLs.
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=back
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=head1 RULE DEFINITIONS AND PRIVILEGED SETTINGS
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=over 4
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=item uridnsbl NAME_OF_RULE dnsbl_zone lookuptype
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Specify a lookup. C<NAME_OF_RULE> is the name of the rule to be
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used, C<dnsbl_zone> is the zone to look up IPs in, and C<lookuptype>
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is the type of lookup (B<TXT> or B<A>). Note that you must also
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define a body-eval rule calling C<check_uridnsbl()> to use this.
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Example:
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uridnsbl URIBL_SBLXBL sbl-xbl.spamhaus.org. TXT
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body URIBL_SBLXBL eval:check_uridnsbl('URIBL_SBLXBL')
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describe URIBL_SBLXBL Contains a URL listed in the SBL/XBL blocklist
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=item uridnssub NAME_OF_RULE dnsbl_zone lookuptype subtest
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Specify a DNSBL-style domain lookup with a sub-test. C<NAME_OF_RULE> is the
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name of the rule to be used, C<dnsbl_zone> is the zone to look up IPs in,
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and C<lookuptype> is the type of lookup (B<TXT> or B<A>).
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C<subtest> is the sub-test to run against the returned data. The sub-test may
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either be an IPv4 dotted address for DNSBLs that return multiple A records or a
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non-negative decimal number to specify a bitmask for DNSBLs that return a
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single A record containing a bitmask of results.
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Note that, as with C<uridnsbl>, you must also define a body-eval rule calling
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C<check_uridnsbl()> to use this.
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Example:
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uridnssub URIBL_DNSBL_4 dnsbl.example.org. A 127.0.0.4
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uridnssub URIBL_DNSBL_8 dnsbl.example.org. A 8
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=item urirhsbl NAME_OF_RULE rhsbl_zone lookuptype
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Specify a RHSBL-style domain lookup. C<NAME_OF_RULE> is the name of the rule
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to be used, C<rhsbl_zone> is the zone to look up domain names in, and
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C<lookuptype> is the type of lookup (B<TXT> or B<A>). Note that you must also
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define a body-eval rule calling C<check_uridnsbl()> to use this.
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An RHSBL zone is one where the domain name is looked up, as a string; e.g. a
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URI using the domain C<foo.com> will cause a lookup of
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C<foo.com.uriblzone.net>. Note that hostnames are stripped from the domain
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used in the URIBL lookup, so the domain C<foo.bar.com> will look up
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C<bar.com.uriblzone.net>, and C<foo.bar.co.uk> will look up
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C<bar.co.uk.uriblzone.net>.
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If an URI consists of an IP address instead of a hostname, the IP address is
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looked up (using the standard reversed quads method) in each C<rhsbl_zone>.
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Example:
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urirhsbl URIBL_RHSBL rhsbl.example.org. TXT
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=item urirhssub NAME_OF_RULE rhsbl_zone lookuptype subtest
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Specify a RHSBL-style domain lookup with a sub-test. C<NAME_OF_RULE> is the
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name of the rule to be used, C<rhsbl_zone> is the zone to look up domain names
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in, and C<lookuptype> is the type of lookup (B<TXT> or B<A>).
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C<subtest> is the sub-test to run against the returned data. The sub-test may
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either be an IPv4 dotted address for RHSBLs that return multiple A records or a
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non-negative decimal number to specify a bitmask for RHSBLs that return a
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single A record containing a bitmask of results.
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Note that, as with C<urirhsbl>, you must also define a body-eval rule calling
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C<check_uridnsbl()> to use this.
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Example:
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urirhssub URIBL_RHSBL_4 rhsbl.example.org. A 127.0.0.4
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urirhssub URIBL_RHSBL_8 rhsbl.example.org. A 8
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=item urinsrhsbl NAME_OF_RULE rhsbl_zone lookuptype
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Perform a RHSBL-style domain lookup against the contents of the NS records
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for each URI. In other words, a URI using the domain C<foo.com> will cause
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an NS lookup to take place; assuming that domain has an NS of C<ns0.bar.com>,
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that will cause a lookup of C<bar.com.uriblzone.net>. Note that hostnames
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are stripped from both the domain used in the URI, and the domain in the
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lookup.
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C<NAME_OF_RULE> is the name of the rule to be used, C<rhsbl_zone> is the zone
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to look up domain names in, and C<lookuptype> is the type of lookup (B<TXT> or
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B<A>).
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Note that, as with C<urirhsbl>, you must also define a body-eval rule calling
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C<check_uridnsbl()> to use this.
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=item urinsrhssub NAME_OF_RULE rhsbl_zone lookuptype subtest
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Specify a RHSBL-style domain-NS lookup, as above, with a sub-test.
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C<NAME_OF_RULE> is the name of the rule to be used, C<rhsbl_zone> is the zone
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to look up domain names in, and C<lookuptype> is the type of lookup (B<TXT> or
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B<A>). C<subtest> is the sub-test to run against the returned data; see
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<urirhssub>.
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Note that, as with C<urirhsbl>, you must also define a body-eval rule calling
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C<check_uridnsbl()> to use this.
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=item urifullnsrhsbl NAME_OF_RULE rhsbl_zone lookuptype
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Perform a RHSBL-style domain lookup against the contents of the NS records for
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each URI. In other words, a URI using the domain C<foo.com> will cause an NS
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lookup to take place; assuming that domain has an NS of C<ns0.bar.com>, that
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will cause a lookup of C<ns0.bar.com.uriblzone.net>. Note that hostnames are
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stripped from the domain used in the URI.
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C<NAME_OF_RULE> is the name of the rule to be used, C<rhsbl_zone> is the zone
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to look up domain names in, and C<lookuptype> is the type of lookup (B<TXT> or
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B<A>).
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Note that, as with C<urirhsbl>, you must also define a body-eval rule calling
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C<check_uridnsbl()> to use this.
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=item urifullnsrhssub NAME_OF_RULE rhsbl_zone lookuptype subtest
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Specify a RHSBL-style domain-NS lookup, as above, with a sub-test.
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C<NAME_OF_RULE> is the name of the rule to be used, C<rhsbl_zone> is the zone
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to look up domain names in, and C<lookuptype> is the type of lookup (B<TXT> or
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B<A>). C<subtest> is the sub-test to run against the returned data; see
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<urirhssub>.
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Note that, as with C<urirhsbl>, you must also define a body-eval rule calling
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C<check_uridnsbl()> to use this.
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=back
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=head1 ADMINISTRATOR SETTINGS
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=over 4
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=item uridnsbl_max_domains N (default: 20)
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The maximum number of domains to look up.
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=back
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=head1 NOTES
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The C<uridnsbl_timeout> option has been obsoleted by the C<rbl_timeout>
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option. See the C<Mail::SpamAssassin::Conf> POD for details on C<rbl_timeout>.
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=cut
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package Mail::SpamAssassin::Plugin::URIDNSBL;
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use Mail::SpamAssassin::Plugin;
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use Mail::SpamAssassin::Constants qw(:ip);
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use Mail::SpamAssassin::Util;
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use Mail::SpamAssassin::Util::RegistrarBoundaries;
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use Mail::SpamAssassin::Logger;
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use strict;
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use warnings;
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use bytes;
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use re 'taint';
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use vars qw(@ISA);
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@ISA = qw(Mail::SpamAssassin::Plugin);
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use constant LOG_COMPLETION_TIMES => 0;
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# constructor
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sub new {
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my $class = shift;
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my $samain = shift;
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# some boilerplate...
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$class = ref($class) || $class;
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my $self = $class->SUPER::new($samain);
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bless ($self, $class);
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# this can be effectively global, at least in each process, safely
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$self->{finished} = { };
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$self->register_eval_rule ("check_uridnsbl");
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$self->set_config($samain->{conf});
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return $self;
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}
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# this is just a placeholder; in fact the results are dealt with later
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sub check_uridnsbl {
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return 0;
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}
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# ---------------------------------------------------------------------------
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# once the metadata is parsed, we can access the URI list. So start off
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# the lookups here!
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sub parsed_metadata {
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my ($self, $opts) = @_;
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my $scanner = $opts->{permsgstatus};
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return 0 if $scanner->{main}->{conf}->{skip_uribl_checks};
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if (!$scanner->is_dns_available()) {
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$self->{dns_not_available} = 1;
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return 0;
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} else {
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# due to re-testing dns may become available after being unavailable
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# DOS: I don't think dns_not_available is even used anymore
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$self->{dns_not_available} = 0;
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}
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$scanner->{'uridnsbl_activerules'} = { };
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$scanner->{'uridnsbl_hits'} = { };
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$scanner->{'uridnsbl_seen_domain'} = { };
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# only hit DNSBLs for active rules (defined and score != 0)
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$scanner->{'uridnsbl_active_rules_rhsbl'} = { };
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$scanner->{'uridnsbl_active_rules_nsrhsbl'} = { };
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$scanner->{'uridnsbl_active_rules_fullnsrhsbl'} = { };
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$scanner->{'uridnsbl_active_rules_revipbl'} = { };
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foreach my $rulename (keys %{$scanner->{conf}->{uridnsbls}}) {
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next unless ($scanner->{conf}->is_rule_active('body_evals',$rulename));
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my $rulecf = $scanner->{conf}->{uridnsbls}->{$rulename};
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if ($rulecf->{is_rhsbl}) {
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$scanner->{uridnsbl_active_rules_rhsbl}->{$rulename} = 1;
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} elsif ($rulecf->{is_fullnsrhsbl}) {
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$scanner->{uridnsbl_active_rules_fullnsrhsbl}->{$rulename} = 1;
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} elsif ($rulecf->{is_nsrhsbl}) {
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$scanner->{uridnsbl_active_rules_nsrhsbl}->{$rulename} = 1;
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} else {
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$scanner->{uridnsbl_active_rules_revipbl}->{$rulename} = 1;
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}
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}
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# get all domains in message
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# don't keep dereferencing this
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my $skip_domains = $scanner->{main}->{conf}->{uridnsbl_skip_domains};
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# list of hashes to use in order
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my @uri_ordered;
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# Generate the full list of html-parsed domains.
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my $uris = $scanner->get_uri_detail_list();
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# go from uri => info to uri_ordered
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# 0: a
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# 1: form
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# 2: img
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# 3: !a_empty
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# 4: parsed
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# 5: a_empty
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while (my($uri, $info) = each %{$uris}) {
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# we want to skip mailto: uris
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next if ($uri =~ /^mailto:/);
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# no domains were found via this uri, so skip
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next unless ($info->{domains});
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my $entry = 3;
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if ($info->{types}->{a}) {
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$entry = 5;
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# determine a vs a_empty
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foreach my $at (@{$info->{anchor_text}}) {
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if (length $at) {
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$entry = 0;
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last;
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}
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}
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}
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elsif ($info->{types}->{form}) {
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$entry = 1;
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}
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elsif ($info->{types}->{img}) {
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$entry = 2;
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}
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elsif ($info->{types}->{parsed} && (keys %{$info->{types}} == 1)) {
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$entry = 4;
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}
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# take the usable domains and add to the ordered list
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foreach ( keys %{ $info->{domains} } ) {
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if (exists $skip_domains->{$_}) {
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dbg("uridnsbl: domain $_ in skip list");
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next;
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}
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$uri_ordered[$entry]->{$_} = 1;
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}
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}
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# at this point, @uri_ordered is an ordered array of uri hashes
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my %domlist;
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my $umd = $scanner->{main}->{conf}->{uridnsbl_max_domains};
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while (keys %domlist < $umd && @uri_ordered) {
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my $array = shift @uri_ordered;
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next unless $array;
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# run through and find the new domains in this grouping
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my @domains = grep(!$domlist{$_}, keys %{$array});
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next unless @domains;
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# the new domains are all useful, just add them in
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if (keys(%domlist) + @domains <= $umd) {
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foreach (@domains) {
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$domlist{$_} = 1;
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}
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}
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else {
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# trim down to a limited number - pick randomly
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my $i;
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while (@domains && keys %domlist < $umd) {
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my $r = int rand (scalar @domains);
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$domlist{splice (@domains, $r, 1)} = 1;
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}
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}
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}
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# and query
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dbg("uridnsbl: domains to query: ".join(' ',keys %domlist));
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foreach my $dom (keys %domlist) {
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$self->query_domain ($scanner, $dom);
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}
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return 1;
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}
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sub set_config {
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my($self, $conf) = @_;
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my @cmds;
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push(@cmds, {
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setting => 'skip_uribl_checks',
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default => 0,
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type => $Mail::SpamAssassin::Conf::CONF_TYPE_BOOL,
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});
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push(@cmds, {
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setting => 'uridnsbl_max_domains',
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is_admin => 1,
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default => 20,
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type => $Mail::SpamAssassin::Conf::CONF_TYPE_NUMERIC,
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});
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push (@cmds, {
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setting => 'uridnsbl',
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is_priv => 1,
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code => sub {
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my ($self, $key, $value, $line) = @_;
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if ($value =~ /^(\S+)\s+(\S+)\s+(\S+)$/) {
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my $rulename = $1;
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my $zone = $2;
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my $type = $3;
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$self->{uridnsbls}->{$rulename} = {
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zone => $zone, type => $type,
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is_rhsbl => 0
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};
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}
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elsif ($value =~ /^$/) {
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return $Mail::SpamAssassin::Conf::MISSING_REQUIRED_VALUE;
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}
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else {
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return $Mail::SpamAssassin::Conf::INVALID_VALUE;
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}
|
| 427 |
}
|
| 428 |
});
|
| 429 |
|
| 430 |
push (@cmds, {
|
| 431 |
setting => 'uridnssub',
|
| 432 |
is_priv => 1,
|
| 433 |
code => sub {
|
| 434 |
my ($self, $key, $value, $line) = @_;
|
| 435 |
if ($value =~ /^(\S+)\s+(\S+)\s+(\S+)\s+(\d{1,10}|\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})$/) {
|
| 436 |
my $rulename = $1;
|
| 437 |
my $zone = $2;
|
| 438 |
my $type = $3;
|
| 439 |
my $subrule = $4;
|
| 440 |
$self->{uridnsbls}->{$rulename} = {
|
| 441 |
zone => $zone, type => $type,
|
| 442 |
is_rhsbl => 0, is_subrule => 1
|
| 443 |
};
|
| 444 |
$self->{uridnsbl_subs}->{$zone} ||= { };
|
| 445 |
push (@{$self->{uridnsbl_subs}->{$zone}->{$subrule}->{rulenames}}, $rulename);
|
| 446 |
}
|
| 447 |
elsif ($value =~ /^$/) {
|
| 448 |
return $Mail::SpamAssassin::Conf::MISSING_REQUIRED_VALUE;
|
| 449 |
}
|
| 450 |
else {
|
| 451 |
return $Mail::SpamAssassin::Conf::INVALID_VALUE;
|
| 452 |
}
|
| 453 |
}
|
| 454 |
});
|
| 455 |
|
| 456 |
push (@cmds, {
|
| 457 |
setting => 'urirhsbl',
|
| 458 |
is_priv => 1,
|
| 459 |
code => sub {
|
| 460 |
my ($self, $key, $value, $line) = @_;
|
| 461 |
if ($value =~ /^(\S+)\s+(\S+)\s+(\S+)$/) {
|
| 462 |
my $rulename = $1;
|
| 463 |
my $zone = $2;
|
| 464 |
my $type = $3;
|
| 465 |
$self->{uridnsbls}->{$rulename} = {
|
| 466 |
zone => $zone, type => $type,
|
| 467 |
is_rhsbl => 1
|
| 468 |
};
|
| 469 |
}
|
| 470 |
elsif ($value =~ /^$/) {
|
| 471 |
return $Mail::SpamAssassin::Conf::MISSING_REQUIRED_VALUE;
|
| 472 |
}
|
| 473 |
else {
|
| 474 |
return $Mail::SpamAssassin::Conf::INVALID_VALUE;
|
| 475 |
}
|
| 476 |
}
|
| 477 |
});
|
| 478 |
|
| 479 |
push (@cmds, {
|
| 480 |
setting => 'urirhssub',
|
| 481 |
is_priv => 1,
|
| 482 |
code => sub {
|
| 483 |
my ($self, $key, $value, $line) = @_;
|
| 484 |
if ($value =~ /^(\S+)\s+(\S+)\s+(\S+)\s+(\d{1,10}|\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})$/) {
|
| 485 |
my $rulename = $1;
|
| 486 |
my $zone = $2;
|
| 487 |
my $type = $3;
|
| 488 |
my $subrule = $4;
|
| 489 |
$self->{uridnsbls}->{$rulename} = {
|
| 490 |
zone => $zone, type => $type,
|
| 491 |
is_rhsbl => 1, is_subrule => 1
|
| 492 |
};
|
| 493 |
$self->{uridnsbl_subs}->{$zone} ||= { };
|
| 494 |
push (@{$self->{uridnsbl_subs}->{$zone}->{$subrule}->{rulenames}}, $rulename);
|
| 495 |
}
|
| 496 |
elsif ($value =~ /^$/) {
|
| 497 |
return $Mail::SpamAssassin::Conf::MISSING_REQUIRED_VALUE;
|
| 498 |
}
|
| 499 |
else {
|
| 500 |
return $Mail::SpamAssassin::Conf::INVALID_VALUE;
|
| 501 |
}
|
| 502 |
}
|
| 503 |
});
|
| 504 |
|
| 505 |
push (@cmds, {
|
| 506 |
setting => 'urinsrhsbl',
|
| 507 |
is_priv => 1,
|
| 508 |
code => sub {
|
| 509 |
my ($self, $key, $value, $line) = @_;
|
| 510 |
if ($value =~ /^(\S+)\s+(\S+)\s+(\S+)$/) {
|
| 511 |
my $rulename = $1;
|
| 512 |
my $zone = $2;
|
| 513 |
my $type = $3;
|
| 514 |
$self->{uridnsbls}->{$rulename} = {
|
| 515 |
zone => $zone, type => $type,
|
| 516 |
is_nsrhsbl => 1
|
| 517 |
};
|
| 518 |
}
|
| 519 |
elsif ($value =~ /^$/) {
|
| 520 |
return $Mail::SpamAssassin::Conf::MISSING_REQUIRED_VALUE;
|
| 521 |
}
|
| 522 |
else {
|
| 523 |
return $Mail::SpamAssassin::Conf::INVALID_VALUE;
|
| 524 |
}
|
| 525 |
}
|
| 526 |
});
|
| 527 |
|
| 528 |
push (@cmds, {
|
| 529 |
setting => 'urinsrhssub',
|
| 530 |
is_priv => 1,
|
| 531 |
code => sub {
|
| 532 |
my ($self, $key, $value, $line) = @_;
|
| 533 |
if ($value =~ /^(\S+)\s+(\S+)\s+(\S+)\s+(\d{1,10}|\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})$/) {
|
| 534 |
my $rulename = $1;
|
| 535 |
my $zone = $2;
|
| 536 |
my $type = $3;
|
| 537 |
my $subrule = $4;
|
| 538 |
$self->{uridnsbls}->{$rulename} = {
|
| 539 |
zone => $zone, type => $type,
|
| 540 |
is_nsrhsbl => 1, is_subrule => 1
|
| 541 |
};
|
| 542 |
$self->{uridnsbl_subs}->{$zone} ||= { };
|
| 543 |
push (@{$self->{uridnsbl_subs}->{$zone}->{$subrule}->{rulenames}}, $rulename);
|
| 544 |
}
|
| 545 |
elsif ($value =~ /^$/) {
|
| 546 |
return $Mail::SpamAssassin::Conf::MISSING_REQUIRED_VALUE;
|
| 547 |
}
|
| 548 |
else {
|
| 549 |
return $Mail::SpamAssassin::Conf::INVALID_VALUE;
|
| 550 |
}
|
| 551 |
}
|
| 552 |
});
|
| 553 |
|
| 554 |
push (@cmds, {
|
| 555 |
setting => 'urifullnsrhsbl',
|
| 556 |
is_priv => 1,
|
| 557 |
code => sub {
|
| 558 |
my ($self, $key, $value, $line) = @_;
|
| 559 |
if ($value =~ /^(\S+)\s+(\S+)\s+(\S+)$/) {
|
| 560 |
my $rulename = $1;
|
| 561 |
my $zone = $2;
|
| 562 |
my $type = $3;
|
| 563 |
$self->{uridnsbls}->{$rulename} = {
|
| 564 |
zone => $zone, type => $type,
|
| 565 |
is_fullnsrhsbl => 1
|
| 566 |
};
|
| 567 |
}
|
| 568 |
elsif ($value =~ /^$/) {
|
| 569 |
return $Mail::SpamAssassin::Conf::MISSING_REQUIRED_VALUE;
|
| 570 |
}
|
| 571 |
else {
|
| 572 |
return $Mail::SpamAssassin::Conf::INVALID_VALUE;
|
| 573 |
}
|
| 574 |
}
|
| 575 |
});
|
| 576 |
|
| 577 |
push (@cmds, {
|
| 578 |
setting => 'urifullnsrhssub',
|
| 579 |
is_priv => 1,
|
| 580 |
code => sub {
|
| 581 |
my ($self, $key, $value, $line) = @_;
|
| 582 |
if ($value =~ /^(\S+)\s+(\S+)\s+(\S+)\s+(\d{1,10}|\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})$/) {
|
| 583 |
my $rulename = $1;
|
| 584 |
my $zone = $2;
|
| 585 |
my $type = $3;
|
| 586 |
my $subrule = $4;
|
| 587 |
$self->{uridnsbls}->{$rulename} = {
|
| 588 |
zone => $zone, type => $type,
|
| 589 |
is_fullnsrhsbl => 1, is_subrule => 1
|
| 590 |
};
|
| 591 |
$self->{uridnsbl_subs}->{$zone} ||= { };
|
| 592 |
push (@{$self->{uridnsbl_subs}->{$zone}->{$subrule}->{rulenames}}, $rulename);
|
| 593 |
}
|
| 594 |
elsif ($value =~ /^$/) {
|
| 595 |
return $Mail::SpamAssassin::Conf::MISSING_REQUIRED_VALUE;
|
| 596 |
}
|
| 597 |
else {
|
| 598 |
return $Mail::SpamAssassin::Conf::INVALID_VALUE;
|
| 599 |
}
|
| 600 |
}
|
| 601 |
});
|
| 602 |
|
| 603 |
push (@cmds, {
|
| 604 |
setting => 'uridnsbl_skip_domain',
|
| 605 |
default => {},
|
| 606 |
type => $Mail::SpamAssassin::Conf::CONF_TYPE_HASH_KEY_VALUE,
|
| 607 |
code => sub {
|
| 608 |
my ($self, $key, $value, $line) = @_;
|
| 609 |
if ($value =~ /^$/) {
|
| 610 |
return $Mail::SpamAssassin::Conf::MISSING_REQUIRED_VALUE;
|
| 611 |
}
|
| 612 |
foreach my $domain (split(/\s+/, $value)) {
|
| 613 |
$self->{uridnsbl_skip_domains}->{lc $domain} = 1;
|
| 614 |
}
|
| 615 |
}
|
| 616 |
});
|
| 617 |
|
| 618 |
# obsolete
|
| 619 |
push(@cmds, {
|
| 620 |
setting => 'uridnsbl_timeout',
|
| 621 |
code => sub {
|
| 622 |
# not a lint_warn(), since it's pretty harmless and we don't want
|
| 623 |
# to break stuff like sa-update
|
| 624 |
warn("config: 'uridnsbl_timeout' is obsolete, use 'rbl_timeout' instead");
|
| 625 |
return 0;
|
| 626 |
}
|
| 627 |
});
|
| 628 |
|
| 629 |
$conf->{parser}->register_commands(\@cmds);
|
| 630 |
}
|
| 631 |
|
| 632 |
# ---------------------------------------------------------------------------
|
| 633 |
|
| 634 |
sub query_domain {
|
| 635 |
my ($self, $scanner, $dom) = @_;
|
| 636 |
|
| 637 |
#warn "uridnsbl: domain $dom\n";
|
| 638 |
#return;
|
| 639 |
|
| 640 |
$dom = lc $dom;
|
| 641 |
return if $scanner->{uridnsbl_seen_domain}->{$dom};
|
| 642 |
$scanner->{uridnsbl_seen_domain}->{$dom} = 1;
|
| 643 |
$self->log_dns_result("querying domain $dom");
|
| 644 |
|
| 645 |
my $obj = { dom => $dom };
|
| 646 |
|
| 647 |
my $single_dnsbl = 0;
|
| 648 |
if ($dom =~ /^\d+\.\d+\.\d+\.\d+$/) {
|
| 649 |
my $IPV4_ADDRESS = IPV4_ADDRESS;
|
| 650 |
my $IP_PRIVATE = IP_PRIVATE;
|
| 651 |
# only look up the IP if it is public and valid
|
| 652 |
if ($dom =~ /^$IPV4_ADDRESS$/ && $dom !~ /^$IP_PRIVATE$/) {
|
| 653 |
$self->lookup_dnsbl_for_ip($scanner, $obj, $dom);
|
| 654 |
# and check the IP in RHSBLs too
|
| 655 |
if ($dom =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/) {
|
| 656 |
$dom = "$4.$3.$2.$1";
|
| 657 |
$single_dnsbl = 1;
|
| 658 |
}
|
| 659 |
}
|
| 660 |
}
|
| 661 |
else {
|
| 662 |
$single_dnsbl = 1;
|
| 663 |
}
|
| 664 |
|
| 665 |
my $rhsblrules = $scanner->{uridnsbl_active_rules_rhsbl};
|
| 666 |
my $nsrhsblrules = $scanner->{uridnsbl_active_rules_nsrhsbl};
|
| 667 |
my $fullnsrhsblrules = $scanner->{uridnsbl_active_rules_fullnsrhsbl};
|
| 668 |
my $reviprules = $scanner->{uridnsbl_active_rules_revipbl};
|
| 669 |
|
| 670 |
if ($single_dnsbl) {
|
| 671 |
# look up the domain in the RHSBL subset
|
| 672 |
foreach my $rulename (keys %{$rhsblrules}) {
|
| 673 |
my $rulecf = $scanner->{conf}->{uridnsbls}->{$rulename};
|
| 674 |
$self->lookup_single_dnsbl($scanner, $obj, $rulename,
|
| 675 |
$dom, $rulecf->{zone}, $rulecf->{type});
|
| 676 |
|
| 677 |
# see comment below
|
| 678 |
$scanner->register_async_rule_start($rulename);
|
| 679 |
}
|
| 680 |
|
| 681 |
# perform NS, A lookups to look up the domain in the non-RHSBL subset,
|
| 682 |
# but only if there are active reverse-IP-URIBL rules
|
| 683 |
if ($dom !~ /^\d+\.\d+\.\d+\.\d+$/ &&
|
| 684 |
(scalar keys %{$reviprules} ||
|
| 685 |
scalar keys %{$nsrhsblrules} ||
|
| 686 |
scalar keys %{$fullnsrhsblrules}))
|
| 687 |
{
|
| 688 |
$self->lookup_domain_ns($scanner, $obj, $dom);
|
| 689 |
}
|
| 690 |
}
|
| 691 |
|
| 692 |
# note that these rules are now underway. important: unless the
|
| 693 |
# rule hits, in the current design, these will not be considered
|
| 694 |
# "finished" until harvest_dnsbl_queries() completes
|
| 695 |
foreach my $rulename (keys %{$reviprules}) {
|
| 696 |
$scanner->register_async_rule_start($rulename);
|
| 697 |
}
|
| 698 |
}
|
| 699 |
|
| 700 |
# ---------------------------------------------------------------------------
|
| 701 |
|
| 702 |
sub lookup_domain_ns {
|
| 703 |
my ($self, $scanner, $obj, $dom) = @_;
|
| 704 |
|
| 705 |
my $key = "NS:".$dom;
|
| 706 |
return if $scanner->{async}->get_lookup($key);
|
| 707 |
|
| 708 |
# dig $dom ns
|
| 709 |
my $ent = $self->start_lookup($scanner, $dom, 'NS',
|
| 710 |
$self->res_bgsend($scanner, $dom, 'NS', $key),
|
| 711 |
$key);
|
| 712 |
$ent->{obj} = $obj;
|
| 713 |
}
|
| 714 |
|
| 715 |
sub complete_ns_lookup {
|
| 716 |
my ($self, $scanner, $ent, $dom) = @_;
|
| 717 |
|
| 718 |
my $packet = $ent->{response_packet};
|
| 719 |
my @answer = !defined $packet ? () : $packet->answer;
|
| 720 |
|
| 721 |
my $IPV4_ADDRESS = IPV4_ADDRESS;
|
| 722 |
my $IP_PRIVATE = IP_PRIVATE;
|
| 723 |
my $nsrhsblrules = $scanner->{uridnsbl_active_rules_nsrhsbl};
|
| 724 |
my $fullnsrhsblrules = $scanner->{uridnsbl_active_rules_fullnsrhsbl};
|
| 725 |
|
| 726 |
foreach my $rr (@answer) {
|
| 727 |
my $str = $rr->string;
|
| 728 |
next unless (defined($str) && defined($dom));
|
| 729 |
$self->log_dns_result ("NSs for $dom: $str");
|
| 730 |
|
| 731 |
if ($str =~ /IN\s+NS\s+(\S+)/) {
|
| 732 |
my $nsmatch = $1;
|
| 733 |
my $nsrhblstr = $nsmatch;
|
| 734 |
my $fullnsrhblstr = $nsmatch;
|
| 735 |
$fullnsrhblstr =~ s/\.$//;
|
| 736 |
|
| 737 |
if ($nsmatch =~ /^\d+\.\d+\.\d+\.\d+\.?$/) {
|
| 738 |
$nsmatch =~ s/\.$//;
|
| 739 |
# only look up the IP if it is public and valid
|
| 740 |
if ($nsmatch =~ /^$IPV4_ADDRESS$/ && $nsmatch !~ /^$IP_PRIVATE$/) {
|
| 741 |
$self->lookup_dnsbl_for_ip($scanner, $ent->{obj}, $nsmatch);
|
| 742 |
}
|
| 743 |
$nsrhblstr = $nsmatch;
|
| 744 |
}
|
| 745 |
else {
|
| 746 |
$self->lookup_a_record($scanner, $ent->{obj}, $nsmatch);
|
| 747 |
$nsrhblstr = Mail::SpamAssassin::Util::RegistrarBoundaries::trim_domain($nsmatch);
|
| 748 |
}
|
| 749 |
|
| 750 |
foreach my $rulename (keys %{$nsrhsblrules}) {
|
| 751 |
my $rulecf = $scanner->{conf}->{uridnsbls}->{$rulename};
|
| 752 |
$self->lookup_single_dnsbl($scanner, $ent->{obj}, $rulename,
|
| 753 |
$nsrhblstr, $rulecf->{zone}, $rulecf->{type});
|
| 754 |
|
| 755 |
$scanner->register_async_rule_start($rulename);
|
| 756 |
}
|
| 757 |
|
| 758 |
foreach my $rulename (keys %{$fullnsrhsblrules}) {
|
| 759 |
my $rulecf = $scanner->{conf}->{uridnsbls}->{$rulename};
|
| 760 |
$self->lookup_single_dnsbl($scanner, $ent->{obj}, $rulename,
|
| 761 |
$fullnsrhblstr, $rulecf->{zone}, $rulecf->{type});
|
| 762 |
|
| 763 |
$scanner->register_async_rule_start($rulename);
|
| 764 |
}
|
| 765 |
}
|
| 766 |
}
|
| 767 |
}
|
| 768 |
|
| 769 |
# ---------------------------------------------------------------------------
|
| 770 |
|
| 771 |
sub lookup_a_record {
|
| 772 |
my ($self, $scanner, $obj, $hname) = @_;
|
| 773 |
|
| 774 |
my $key = "A:".$hname;
|
| 775 |
return if $scanner->{async}->get_lookup($key);
|
| 776 |
|
| 777 |
# dig $hname a
|
| 778 |
my $ent = $self->start_lookup($scanner, $hname, 'A',
|
| 779 |
$self->res_bgsend($scanner, $hname, 'A', $key),
|
| 780 |
$key);
|
| 781 |
$ent->{obj} = $obj;
|
| 782 |
}
|
| 783 |
|
| 784 |
sub complete_a_lookup {
|
| 785 |
my ($self, $scanner, $ent, $hname) = @_;
|
| 786 |
|
| 787 |
my $packet = $ent->{response_packet};
|
| 788 |
my @answer = !defined $packet ? () : $packet->answer;
|
| 789 |
foreach my $rr (@answer) {
|
| 790 |
my $str = $rr->string;
|
| 791 |
$self->log_dns_result ("A for NS $hname: $str");
|
| 792 |
|
| 793 |
if ($str =~ /IN\s+A\s+(\S+)/) {
|
| 794 |
$self->lookup_dnsbl_for_ip($scanner, $ent->{obj}, $1);
|
| 795 |
}
|
| 796 |
}
|
| 797 |
}
|
| 798 |
|
| 799 |
# ---------------------------------------------------------------------------
|
| 800 |
|
| 801 |
sub lookup_dnsbl_for_ip {
|
| 802 |
my ($self, $scanner, $obj, $ip) = @_;
|
| 803 |
|
| 804 |
$ip =~ /^(\d+)\.(\d+)\.(\d+)\.(\d+)$/;
|
| 805 |
my $revip = "$4.$3.$2.$1";
|
| 806 |
|
| 807 |
my $cf = $scanner->{uridnsbl_active_rules_revipbl};
|
| 808 |
foreach my $rulename (keys %{$cf}) {
|
| 809 |
my $rulecf = $scanner->{conf}->{uridnsbls}->{$rulename};
|
| 810 |
$self->lookup_single_dnsbl($scanner, $obj, $rulename,
|
| 811 |
$revip, $rulecf->{zone}, $rulecf->{type});
|
| 812 |
}
|
| 813 |
}
|
| 814 |
|
| 815 |
sub lookup_single_dnsbl {
|
| 816 |
my ($self, $scanner, $obj, $rulename, $lookupstr, $dnsbl, $qtype) = @_;
|
| 817 |
|
| 818 |
my $key = "DNSBL:".$dnsbl.":".$lookupstr;
|
| 819 |
return if $scanner->{async}->get_lookup($key);
|
| 820 |
my $item = $lookupstr.".".$dnsbl;
|
| 821 |
|
| 822 |
# dig $ip txt
|
| 823 |
my $ent = $self->start_lookup($scanner, $item, 'DNSBL',
|
| 824 |
$self->res_bgsend($scanner, $item, $qtype, $key),
|
| 825 |
$key);
|
| 826 |
$ent->{obj} = $obj;
|
| 827 |
$ent->{rulename} = $rulename;
|
| 828 |
$ent->{zone} = $dnsbl;
|
| 829 |
}
|
| 830 |
|
| 831 |
sub complete_dnsbl_lookup {
|
| 832 |
my ($self, $scanner, $ent, $dnsblip) = @_;
|
| 833 |
|
| 834 |
my $conf = $scanner->{conf};
|
| 835 |
my @subtests;
|
| 836 |
my $rulename = $ent->{rulename};
|
| 837 |
my $rulecf = $conf->{uridnsbls}->{$rulename};
|
| 838 |
|
| 839 |
my $packet = $ent->{response_packet};
|
| 840 |
my @answer = !defined $packet ? () : $packet->answer;
|
| 841 |
|
| 842 |
my $uridnsbl_subs = $conf->{uridnsbl_subs}->{$ent->{zone}};
|
| 843 |
foreach my $rr (@answer)
|
| 844 |
{
|
| 845 |
next if ($rr->type ne 'A' && $rr->type ne 'TXT');
|
| 846 |
|
| 847 |
my $rdatastr = $rr->rdatastr;
|
| 848 |
my $dom = $ent->{obj}->{dom};
|
| 849 |
|
| 850 |
if (!$rulecf->{is_subrule}) {
|
| 851 |
# this zone is a simple rule, not a set of subrules
|
| 852 |
# skip any A record that isn't on 127/8
|
| 853 |
if ($rr->type eq 'A' && $rr->rdatastr !~ /^127\./) {
|
| 854 |
warn("uridnsbl: bogus rr for domain=$dom, rule=$rulename, id=" .
|
| 855 |
$packet->header->id." rr=".$rr->string);
|
| 856 |
next;
|
| 857 |
}
|
| 858 |
$self->got_dnsbl_hit($scanner, $ent, $rdatastr, $dom, $rulename);
|
| 859 |
}
|
| 860 |
else {
|
| 861 |
foreach my $subtest (keys (%{$uridnsbl_subs}))
|
| 862 |
{
|
| 863 |
if ($subtest eq $rdatastr) {
|
| 864 |
foreach my $subrulename (@{$uridnsbl_subs->{$subtest}->{rulenames}}) {
|
| 865 |
$self->got_dnsbl_hit($scanner, $ent, $rdatastr, $dom, $subrulename);
|
| 866 |
}
|
| 867 |
}
|
| 868 |
# bitmask
|
| 869 |
elsif ($subtest =~ /^\d+$/) {
|
| 870 |
if ($rdatastr =~ m/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/ &&
|
| 871 |
Mail::SpamAssassin::Util::my_inet_aton($rdatastr) & $subtest)
|
| 872 |
{
|
| 873 |
foreach my $subrulename (@{$uridnsbl_subs->{$subtest}->{rulenames}}) {
|
| 874 |
$self->got_dnsbl_hit($scanner, $ent, $rdatastr, $dom, $subrulename);
|
| 875 |
}
|
| 876 |
}
|
| 877 |
}
|
| 878 |
}
|
| 879 |
}
|
| 880 |
}
|
| 881 |
}
|
| 882 |
|
| 883 |
sub got_dnsbl_hit {
|
| 884 |
my ($self, $scanner, $ent, $str, $dom, $rulename) = @_;
|
| 885 |
|
| 886 |
$str =~ s/\s+/ /gs; # long whitespace => short
|
| 887 |
dbg("uridnsbl: domain \"$dom\" listed ($rulename): $str");
|
| 888 |
|
| 889 |
if (!defined $scanner->{uridnsbl_hits}->{$rulename}) {
|
| 890 |
$scanner->{uridnsbl_hits}->{$rulename} = { };
|
| 891 |
};
|
| 892 |
$scanner->{uridnsbl_hits}->{$rulename}->{$dom} = 1;
|
| 893 |
|
| 894 |
if ($scanner->{uridnsbl_active_rules_revipbl}->{$rulename}
|
| 895 |
|| $scanner->{uridnsbl_active_rules_nsrhsbl}->{$rulename}
|
| 896 |
|| $scanner->{uridnsbl_active_rules_fullnsrhsbl}->{$rulename}
|
| 897 |
|| $scanner->{uridnsbl_active_rules_rhsbl}->{$rulename})
|
| 898 |
{
|
| 899 |
# TODO: this needs to handle multiple domain hits per rule
|
| 900 |
$scanner->clear_test_state();
|
| 901 |
my $uris = join (' ', keys %{$scanner->{uridnsbl_hits}->{$rulename}});
|
| 902 |
$scanner->test_log ("URIs: $uris");
|
| 903 |
$scanner->got_hit ($rulename, "");
|
| 904 |
|
| 905 |
# note that this rule has completed (since it got at least 1 hit)
|
| 906 |
$scanner->register_async_rule_finish($rulename);
|
| 907 |
}
|
| 908 |
}
|
| 909 |
|
| 910 |
# ---------------------------------------------------------------------------
|
| 911 |
|
| 912 |
sub start_lookup {
|
| 913 |
my ($self, $scanner, $zone, $type, $id, $key) = @_;
|
| 914 |
|
| 915 |
my $ent = {
|
| 916 |
key => $key,
|
| 917 |
zone => $zone, # serves to fetch other per-zone settings
|
| 918 |
type => "URI-".$type,
|
| 919 |
id => $id,
|
| 920 |
completed_callback => sub {
|
| 921 |
my $ent = shift;
|
| 922 |
if (defined $ent->{response_packet}) { # not aborted or empty
|
| 923 |
$self->completed_lookup_callback ($scanner, $ent);
|
| 924 |
}
|
| 925 |
}
|
| 926 |
};
|
| 927 |
$scanner->{async}->start_lookup($ent);
|
| 928 |
return $ent;
|
| 929 |
}
|
| 930 |
|
| 931 |
sub completed_lookup_callback {
|
| 932 |
my ($self, $scanner, $ent) = @_;
|
| 933 |
my $type = $ent->{type};
|
| 934 |
my $key = $ent->{key};
|
| 935 |
$key =~ /:(\S+?)$/; my $val = $1;
|
| 936 |
|
| 937 |
if ($type eq 'URI-NS') {
|
| 938 |
$self->complete_ns_lookup ($scanner, $ent, $val);
|
| 939 |
}
|
| 940 |
elsif ($type eq 'URI-A') {
|
| 941 |
$self->complete_a_lookup ($scanner, $ent, $val);
|
| 942 |
}
|
| 943 |
elsif ($type eq 'URI-DNSBL') {
|
| 944 |
$self->complete_dnsbl_lookup ($scanner, $ent, $val);
|
| 945 |
}
|
| 946 |
}
|
| 947 |
|
| 948 |
# ---------------------------------------------------------------------------
|
| 949 |
|
| 950 |
sub res_bgsend {
|
| 951 |
my ($self, $scanner, $host, $type, $key) = @_;
|
| 952 |
|
| 953 |
return $self->{main}->{resolver}->bgsend($host, $type, undef, sub {
|
| 954 |
my ($pkt, $id, $timestamp) = @_;
|
| 955 |
$scanner->{async}->set_response_packet($id, $pkt, $key, $timestamp);
|
| 956 |
});
|
| 957 |
}
|
| 958 |
|
| 959 |
sub log_dns_result {
|
| 960 |
#my $self = shift;
|
| 961 |
#Mail::SpamAssassin::dbg("uridnsbl: ".join (' ', @_));
|
| 962 |
}
|
| 963 |
|
| 964 |
# ---------------------------------------------------------------------------
|
| 965 |
|
| 966 |
1;
|
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