6e99c49321
- pet pkg-plist Submitted by: Herbert J. Skuhra [1] Reviewed by: Vernon Schryver vjs@rhyolite.com Approved by: gabor (mentor) Obtained from: https://issues.apache.org/SpamAssassin/show_bug.cgi?id=6698
1471 lines
52 KiB
Text
1471 lines
52 KiB
Text
--- lib/Mail/SpamAssassin/Plugin/DCC.pm 2011-06-06 19:59:17.000000000 -0400
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+++ lib/Mail/SpamAssassin/Plugin/DCC.pm 2011-11-26 07:22:36.000000000 -0500
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@@ -15,6 +15,20 @@
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# limitations under the License.
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# </@LICENSE>
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+# Changes since SpamAssassin 3.3.2:
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+# support for DCC learning. See dcc_learn_score.
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+# deal with orphan dccifd sockets
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+# use `cdcc -q` to not stall waiting to find a DCC server when deciding
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+# whether DCC checks are enabled
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+# use dccproc -Q or dccifd query if a pre-existing X-DCC header shows
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+# the message has already been reported
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+# dccproc now uses -w /var/dcc/whiteclnt so it acts more like dccifd
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+# warn about the use of ancient versions of dccproc and dccifd
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+# turn off dccifd greylisting
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+# query instead of reporting mail messages that contain X-DCC headers and
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+# and so has probably already been reported
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+# try harder to find dccproc and cdcc when not explicitly configured
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+
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=head1 NAME
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Mail::SpamAssassin::Plugin::DCC - perform DCC check of messages
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@@ -30,30 +44,31 @@
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The DCC or Distributed Checksum Clearinghouse is a system of servers
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collecting and counting checksums of millions of mail messages.
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-TheSpamAssassin.pm counts can be used by SpamAssassin to detect and
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-reject or filter spam.
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-
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-Because simplistic checksums of spam can be easily defeated, the main
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-DCC checksums are fuzzy and ignore aspects of messages. The fuzzy
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-checksums are changed as spam evolves.
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+The counts can be used by SpamAssassin to detect and filter spam.
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-Note that DCC is disabled by default in C<init.pre> because it is not
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-open source. See the DCC license for more details.
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+See http://www.dcc-servers.net/dcc/ for more information about DCC.
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-See http://www.rhyolite.com/anti-spam/dcc/ for more information about
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-DCC.
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+Note that DCC is disabled by default in C<v310.pre> because its use requires
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+software that is not distributed with SpamAssassin and that has license
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+restrictions for certain commercial uses.
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+See the DCC license at http://www.dcc-servers.net/dcc/LICENSE for details.
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+
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+Enable it by uncommenting the "loadplugin Mail::SpamAssassin::Plugin::DCC"
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+confdir/v310.pre or by adding this line to your local.pre. It might also
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+be necessary to install a DCC package, port, rpm, or equivalent from your
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+operating system distributor or a tarball from the primary DCC source
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+at http://www.dcc-servers.net/dcc/#download
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+See also http://www.dcc-servers.net/dcc/INSTALL.html
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=head1 TAGS
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The following tags are added to the set, available for use in reports,
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header fields, other plugins, etc.:
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- _DCCB_ DCC server ID in a response
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- _DCCR_ response from DCC - header field body in X-DCC-*-Metrics
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- _DCCREP_ response from DCC - DCC reputation in percents (0..100)
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-
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-Tag _DCCREP_ provides a nonempty value only with commercial DCC systems.
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-This is the percentage of spam vs. ham sent from the first untrusted relay.
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+ _DCCB_ DCC server ID in X-DCC-*-Metrics header field name
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+ _DCCR_ X-DCC-*-Metrics header field body
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+ _DCCREP_ DCC Reputation or percent bulk mail (0..100) from
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+ commercial DCC software
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=cut
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@@ -75,8 +90,6 @@
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use vars qw(@ISA);
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@ISA = qw(Mail::SpamAssassin::Plugin);
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-use vars qw($have_inet6);
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-
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sub new {
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my $class = shift;
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my $mailsaobject = shift;
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@@ -87,7 +100,7 @@
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# are network tests enabled?
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if ($mailsaobject->{local_tests_only}) {
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- $self->{dcc_disabled} = 1;
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+ $self->{use_dcc} = 0;
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dbg("dcc: local tests only, disabling DCC");
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}
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else {
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@@ -128,20 +141,23 @@
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=item dcc_fuz2_max NUMBER
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-This option sets how often a message's body/fuz1/fuz2 checksum must have been
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-reported to the DCC server before SpamAssassin will consider the DCC check as
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-matched.
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-
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-As nearly all DCC clients are auto-reporting these checksums, you should set
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-this to a relatively high value, e.g. C<999999> (this is DCC's MANY count).
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+Sets how often a message's body/fuz1/fuz2 checksum must have been reported
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+to the DCC server before SpamAssassin will consider the DCC check hit.
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+C<999999> is DCC's MANY count.
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The default is C<999999> for all these options.
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=item dcc_rep_percent NUMBER
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-Only commercial DCC systems provide DCC reputation information. This is the
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-percentage of spam vs. ham sent from the first untrusted relay. It will hit
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-on new spam from spam sources. Default is C<90>.
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+Only the commercial DCC software provides DCC Reputations. A DCC Reputation
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+is the percentage of bulk mail received from the last untrusted relay in the
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+path taken by a mail message as measured by all commercial DCC installations.
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+See http://www.rhyolite.com/dcc/reputations.html
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+You C<must> whitelist your trusted relays or MX servers with MX or
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+MXDCC lines in /var/dcc/whiteclnt as described in the main DCC man page
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+to avoid seeing your own MX servers as sources of bulk mail.
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+See http://www.dcc-servers.net/dcc/dcc-tree/dcc.html#White-and-Blacklists
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+The default is C<90>.
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=cut
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@@ -189,13 +205,9 @@
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=item dcc_home STRING
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This option tells SpamAssassin where to find the dcc homedir.
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-If not given, it will try to get dcc to specify one, and if that fails it
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-will try dcc's own default homedir of '/var/dcc'.
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-If C<dcc_path> is not specified, it will default to looking in
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-C<dcc_home/bin> for dcc client instead of relying on SpamAssassin to find it
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-in the current PATH. If it isn't found there, it will look in the current
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-PATH. If a C<dccifd> socket is found in C<dcc_home> or specified explicitly,
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-it will use that interface instead of C<dccproc>.
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+If not specified, try to use the locally configured directory
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+from the C<cdcc homedir> command.
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+Try /var/dcc if that command fails.
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=cut
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@@ -205,7 +217,7 @@
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type => $Mail::SpamAssassin::Conf::CONF_TYPE_STRING,
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code => sub {
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my ($self, $key, $value, $line) = @_;
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- if (!defined $value || !length $value) {
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+ if (!defined $value || $value eq '') {
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return $Mail::SpamAssassin::Conf::MISSING_REQUIRED_VALUE;
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}
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$value = untaint_file_path($value);
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@@ -223,14 +235,16 @@
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=item dcc_dccifd_path STRING
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-This option tells SpamAssassin where to find the dccifd socket. If
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-C<dcc_dccifd_path> is not specified, it will default to looking for a socket
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-named C<dccifd> in a directory C<dcc_home>. The C<dcc_dccifd_path> can be
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-a Unix socket name (absolute path), or an INET socket specification in a form
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-C<[host]:port> or C<host:port>, where a host can be an IPv4 or IPv6 address
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-or a host name, and port is a TCP port number. In case of an IPv6 address the
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-brackets are required syntax. If a C<dccifd> socket is found, the plugin will
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-use it instead of C<dccproc>.
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+This option tells SpamAssassin where to find the dccifd socket instead
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+of a local Unix socket named C<dccifd> in the C<dcc_home> directory.
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+If a socket is specified or found, use it instead of C<dccproc>.
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+
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+If specifed, C<dcc_dccifd_path> is the absolute path of local Unix socket
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+or an INET socket specified as C<[Host]:Port> or C<Host:Port>.
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+Host can be an IPv4 or IPv6 address or a host name
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+Port is a TCP port number. The brackets are required for an IPv6 address.
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+
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+The default is C<undef>.
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=cut
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@@ -240,45 +254,60 @@
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type => $Mail::SpamAssassin::Conf::CONF_TYPE_STRING,
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code => sub {
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my ($self, $key, $value, $line) = @_;
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- $value = '' if !defined $value;
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- $self->{dcc_dccifd_path_raw} = $value; # for logging purposes
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- undef $self->{dcc_dccifd_host};
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- undef $self->{dcc_dccifd_port};
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- undef $self->{dcc_dccifd_socket};
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- local($1,$2,$3);
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- if ($value eq '') {
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+
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+ if (!defined $value || $value eq '') {
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return $Mail::SpamAssassin::Conf::MISSING_REQUIRED_VALUE;
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- } elsif ($value =~ m{^ (?: \[ ([^\]]*) \] | ([^:]*) ) : ([^:]*) \z}sx) {
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- # "[host]:port" or "host:port", where a host can be an IPv4 or IPv6
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- # address or a host name, and port is a TCP port number or service name
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- my $host = defined $1 ? $1 : $2;
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- my $port = $3;
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- $self->{dcc_dccifd_host} = untaint_var($host);
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- $self->{dcc_dccifd_port} = untaint_var($port);
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- dbg("config: dcc_dccifd_path set to [%s]:%s", $host,$port);
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- } else { # assume a unix socket
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+ }
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+
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+ local($1,$2,$3);
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+ if ($value =~ m{^ (?: \[ ([^\]]*) \] | ([^:]*) ) : ([^:]*) \z}sx) {
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+ my $host = untaint_var(defined $1 ? $1 : $2);
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+ my $port = untaint_var($3);
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+ if (!$host) {
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+ info("config: missing or bad host name in dcc_dccifd_path '$value'");
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+ return $Mail::SpamAssassin::Conf::INVALID_VALUE;
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+ }
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+ if (!$port || $port !~ /^\d+\z/ || $port < 1 || $port > 65535) {
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+ info("config: bad TCP port number in dcc_dccifd_path '$value'");
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+ return $Mail::SpamAssassin::Conf::INVALID_VALUE;
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+ }
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+
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+ $self->{dcc_dccifd_host} = $host;
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+ $self->{dcc_dccifd_port} = $port;
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+ if ($host !~ /^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\z/) {
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+ # remember to try IPv6 if we can with a host name or non-IPv4 address
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+ $self->{dcc_dccifd_IPv6} = eval { require IO::Socket::INET6 };
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+ }
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+ dbg("config: dcc_dccifd_path set to [%s]:%s", $host, $port);
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+
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+ } else {
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+ # assume a unix socket
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if ($value !~ m{^/}) {
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- info("config: dcc_dccifd_path should be an absolute socket path");
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+ info("config: dcc_dccifd_path '$value' is not an absolute path");
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# return $Mail::SpamAssassin::Conf::INVALID_VALUE; # abort or accept?
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}
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$value = untaint_file_path($value);
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- # test disabled, dccifd may not yet be running at spamd startup time
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- # if (!-S $value) {
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- # info("config: dcc_dccifd_path '$value' isn't a local socket");
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- # return $Mail::SpamAssassin::Conf::INVALID_VALUE;
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- # }
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+
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$self->{dcc_dccifd_socket} = $value;
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dbg("config: dcc_dccifd_path set to local socket %s", $value);
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+ dbg("dcc: dcc_dccifd_path set to local socket %s", $value);
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}
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+
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+ $self->{dcc_dccifd_path_raw} = $value;
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}
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});
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=item dcc_path STRING
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-This option tells SpamAssassin specifically where to find the C<dccproc>
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-client instead of relying on SpamAssassin to find it in the current PATH.
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-Note that if I<taint mode> is enabled in the Perl interpreter, you should
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-use this, as the current PATH will have been cleared.
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+Where to find the C<dccproc> client program instead of relying on SpamAssassin
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+to find it in the current PATH or C<dcc_home/bin>. This must often be set,
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+because the current PATH is cleared by I<taint mode> in the Perl interpreter,
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+
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+If a C<dccifd> socket is found in C<dcc_home> or specified explicitly
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+with C<dcc_dccifd_path>, use the C<dccifd(8)> interface instead of C<dccproc>.
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+
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+The default is C<undef>.
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+
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=cut
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@@ -289,12 +318,12 @@
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type => $Mail::SpamAssassin::Conf::CONF_TYPE_STRING,
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code => sub {
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my ($self, $key, $value, $line) = @_;
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- if (!defined $value || !length $value) {
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+ if (!defined $value || $value eq '') {
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return $Mail::SpamAssassin::Conf::MISSING_REQUIRED_VALUE;
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}
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$value = untaint_file_path($value);
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if (!-x $value) {
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- info("config: dcc_path '$value' isn't an executable");
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+ info("config: dcc_path '$value' is not executable");
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return $Mail::SpamAssassin::Conf::INVALID_VALUE;
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}
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@@ -304,7 +333,7 @@
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=item dcc_options options
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-Specify additional options to the dccproc(8) command. Please note that only
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+Specify additional options to the dccproc(8) command. Only
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characters in the range [0-9A-Za-z ,._/-] are allowed for security reasons.
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The default is C<undef>.
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@@ -319,6 +348,7 @@
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code => sub {
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my ($self, $key, $value, $line) = @_;
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if ($value !~ m{^([0-9A-Za-z ,._/-]+)$}) {
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+ info("config: dcc_options '$value' contains impermissible characters");
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return $Mail::SpamAssassin::Conf::INVALID_VALUE;
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}
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$self->{dcc_options} = $1;
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@@ -327,8 +357,9 @@
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=item dccifd_options options
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-Specify additional options to send to the dccifd(8) daemon. Please note that only
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-characters in the range [0-9A-Za-z ,._/-] are allowed for security reasons.
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+Specify additional options to send to the dccifd daemon with
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+the ASCII protocol described on the dccifd(8) man page.
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+Only characters in the range [0-9A-Za-z ,._/-] are allowed for security reasons.
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The default is C<undef>.
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@@ -342,265 +373,306 @@
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code => sub {
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my ($self, $key, $value, $line) = @_;
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if ($value !~ m{^([0-9A-Za-z ,._/-]+)$}) {
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+ info("config: dccifd_options '$value' contains impermissible characters");
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return $Mail::SpamAssassin::Conf::INVALID_VALUE;
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}
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$self->{dccifd_options} = $1;
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}
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});
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+=item dcc_learn_score n (default: undef)
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+
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+Report messages with total scores this much larger than the
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+SpamAssassin spam threshold to DCC as spam.
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+
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+=cut
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+
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+ push (@cmds, {
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+ setting => 'dcc_learn_score',
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+ is_admin => 1,
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+ default => undef,
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+ type => $Mail::SpamAssassin::Conf::CONF_TYPE_NUMERIC,
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+ });
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+
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$conf->{parser}->register_commands(\@cmds);
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}
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+
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+
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+
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+sub ck_dir {
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+ my ($self, $dir, $tgt, $src) = @_;
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+
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+ $dir = untaint_file_path($dir);
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+ if (!stat($dir)) {
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+ my $dir_errno = 0+$!;
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+ if ($dir_errno == ENOENT) {
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+ dbg("dcc: $tgt $dir from $src does not exist");
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+ } else {
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+ dbg("dcc: $tgt $dir from $src is not accessible: $!");
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+ }
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+ return;
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+ }
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+ if (!-d _) {
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+ dbg("dcc: $tgt $dir from $src is not a directory");
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+ return;
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+ }
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+
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+ $self->{main}->{conf}->{$tgt} = $dir;
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+ dbg("dcc: use '$tgt $dir' from $src");
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+}
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+
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sub find_dcc_home {
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my ($self) = @_;
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+ my $dcc_libexec;
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+
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+ # just once
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+ return if defined $self->{dcc_version};
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+ $self->{dcc_version} = '?';
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my $conf = $self->{main}->{conf};
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- return if !$conf->{use_dcc};
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- my $dcchome = $conf->{dcc_home} || '';
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- # If we're not given the DCC homedir, try getting DCC to tell us it.
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- # If that fails, try the DCC default homedir of '/var/dcc'.
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- if ($dcchome eq '') {
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+ # Get the DCC software version for talking to dccifd and formating the
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+ # dccifd options and the built-in DCC homedir. Use -q to prevent delays.
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+ my $cdcc_home;
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+ my $cdcc = $self->dcc_pgm_path('cdcc');
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+ my $cmd = '-qV homedir libexecdir';
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+ if ($cdcc && open(CDCC, "$cdcc $cmd 2>&1 |")) {
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+ my $cdcc_output = do { local $/ = undef; <CDCC> };
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+ close CDCC;
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- my $cdcc = Mail::SpamAssassin::Util::find_executable_in_env_path('cdcc');
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+ $cdcc_output =~ s/\n/ /g; # everything in 1 line for debugging
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+ dbg("dcc: `%s %s` reports '%s'", $cdcc, $cmd, $cdcc_output);
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+ $self->{dcc_version} = ($cdcc_output =~ /^(\d+\.\d+\.\d+)/) ? $1 : '';
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+ $cdcc_home = ($cdcc_output =~ /\s+homedir=(\S+)/) ? $1 : '';
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+ if ($cdcc_output =~ /\s+libexecdir=(\S+)/) {
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+ $self->ck_dir($1, 'dcc_libexec', 'cdcc');
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+ }
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+ }
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- my $cdcc_home = '';
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- if ($cdcc && -x $cdcc && open(CDCC, "$cdcc homedir 2>&1|")) {
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- dbg("dcc: dcc_home not set, querying cdcc utility");
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- $cdcc_home = <CDCC> || '';
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- close CDCC;
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+ # without a home, try the homedir from cdcc
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+ if (!$conf->{dcc_home} && $cdcc_home) {
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+ $self->ck_dir($cdcc_home, 'dcc_home', 'cdcc');
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+ }
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+ # finally fall back to /var/dcc
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+ if (!$conf->{dcc_home}) {
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+ $self->ck_dir($conf->{dcc_home} = '/var/dcc', 'dcc_home', 'default')
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+ }
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- chomp $cdcc_home;
|
|
- $cdcc_home =~ s/\s+homedir=//;
|
|
- dbg("dcc: cdcc reports homedir as '%s'", $cdcc_home);
|
|
- }
|
|
-
|
|
- # try first with whatever the cdcc utility reported
|
|
- my $cdcc_home_errno = 0;
|
|
- if ($cdcc_home eq '') {
|
|
- $cdcc_home_errno = ENOENT;
|
|
- } elsif (!stat($cdcc_home)) {
|
|
- $cdcc_home_errno = 0+$!;
|
|
- }
|
|
- if ($cdcc_home_errno == ENOENT) {
|
|
- # no such file
|
|
- } elsif ($cdcc_home_errno != 0) {
|
|
- dbg("dcc: cdcc reported homedir $cdcc_home is not accessible: $!");
|
|
- } elsif (!-d _) {
|
|
- dbg("dcc: cdcc reported homedir $cdcc_home is not a directory");
|
|
- } else { # ok
|
|
- dbg("dcc: cdcc reported homedir $cdcc_home exists, using it");
|
|
- $dcchome = untaint_var($cdcc_home);
|
|
- }
|
|
-
|
|
- # try falling back to /var/dcc
|
|
- if ($dcchome eq '') {
|
|
- my $var_dcc_errno = stat('/var/dcc') ? 0 : 0+$!;
|
|
- if ($var_dcc_errno == ENOENT) {
|
|
- # no such file
|
|
- } elsif ($var_dcc_errno != 0) {
|
|
- dbg("dcc: dcc_home not set and dcc default homedir /var/dcc ".
|
|
- "is not accessible: $!");
|
|
- } elsif (!-d _) {
|
|
- dbg("dcc: dcc_home not set and dcc default homedir /var/dcc ".
|
|
- "is not a directory");
|
|
- } else { # ok
|
|
- dbg("dcc: dcc_home not set but dcc default homedir /var/dcc exists, ".
|
|
- "using it");
|
|
- $dcchome = '/var/dcc';
|
|
+ # fall back to $conf->{dcc_home}/libexec or /var/dcc/libexec for dccsight
|
|
+ if (!$conf->{dcc_libexec}) {
|
|
+ $self->ck_dir($conf->{dcc_home} . '/libexec', 'dcc_libexec', 'dcc_home');
|
|
}
|
|
+ if (!$conf->{dcc_libexec}) {
|
|
+ $self->ck_dir('/var/dcc/libexec', 'dcc_libexec', 'dcc_home');
|
|
}
|
|
|
|
- if ($dcchome eq '') {
|
|
- dbg("dcc: unable to get homedir from cdcc ".
|
|
- "and the dcc default homedir was not found");
|
|
- }
|
|
-
|
|
- # Remember found homedir path
|
|
- dbg("dcc: using '%s' as DCC homedir", $dcchome);
|
|
- $conf->{dcc_home} = $dcchome;
|
|
+ # format options for dccifd
|
|
+ my $opts = ($conf->{dccifd_options} || '') . "\n";
|
|
+ if ($self->{dcc_version} =~ /\d+\.(\d+)\.(\d+)$/ &&
|
|
+ ($1 < 3 || ($1 == 3 && $2 < 123))) {
|
|
+ if ($1 < 3 || ($1 == 3 && $2 < 50)) {
|
|
+ info("dcc: DCC version $self->{dcc_version} is years old, ".
|
|
+ "obsolete, and likely to cause problems. ".
|
|
+ "See http://www.dcc-servers.net/dcc/old-versions.html");
|
|
+ }
|
|
+ $self->{dccifd_lookup_options} = "header " . $opts;
|
|
+ $self->{dccifd_report_options} = "header spam " . $opts;
|
|
+ } else {
|
|
+ # dccifd after version 1.2.123 understands "cksums" and "no-grey"
|
|
+ $self->{dccifd_lookup_options} = "cksums grey-off " . $opts;
|
|
+ $self->{dccifd_report_options} = "header spam grey-off " . $opts;
|
|
}
|
|
}
|
|
|
|
-sub is_dccifd_available {
|
|
- my ($self) = @_;
|
|
-
|
|
+sub dcc_pgm_path {
|
|
+ my ($self, $pgm) = @_;
|
|
+ my $pgmpath;
|
|
my $conf = $self->{main}->{conf};
|
|
- $self->{dccifd_available} = 0;
|
|
|
|
- if (!$conf->{use_dcc}) {
|
|
- dbg("dcc: dccifd is not available: use_dcc is false");
|
|
- } elsif (defined $conf->{dcc_dccifd_host}) {
|
|
- dbg("dcc: dccifd inet socket chosen: [%s]:%s",
|
|
- $conf->{dcc_dccifd_host}, $conf->{dcc_dccifd_port});
|
|
- $self->{dccifd_available} = 1;
|
|
- } else {
|
|
- my $sockpath = $conf->{dcc_dccifd_socket};
|
|
- my $dcchome = $conf->{dcc_home};
|
|
- if (defined $sockpath) {
|
|
- dbg("dcc: dccifd local socket chosen: %s", $sockpath);
|
|
- } elsif (defined $conf->{dcc_dccifd_path_raw}) {
|
|
- # avoid falling back to defaults if explicitly provided but wrong
|
|
- } elsif (defined $dcchome && $dcchome ne '' && -S "$dcchome/dccifd") {
|
|
- $sockpath = "$dcchome/dccifd";
|
|
- $conf->{dcc_dccifd_socket} = $sockpath;
|
|
- dbg("dcc: dccifd default local socket chosen: %s", $sockpath);
|
|
+ $pgmpath = $conf->{dcc_path};
|
|
+ if (defined $pgmpath && $pgmpath ne '') {
|
|
+ # accept explicit setting for dccproc
|
|
+ return $pgmpath if $pgm eq 'dccproc';
|
|
+ # try adapting it for cdcc and everything else
|
|
+ if ($pgmpath =~ s{[^/]+\z}{$pgm}s) {
|
|
+ $pgmpath = untaint_file_path($pgmpath);
|
|
+ if (-x $pgmpath) {
|
|
+ dbg("dcc: dcc_pgm_path, found %s in dcc_path: %s", $pgm,$pgmpath);
|
|
+ return $pgmpath;
|
|
}
|
|
- if (defined $sockpath && -S $sockpath && -w _ && -r _) {
|
|
- $self->{dccifd_available} = 1;
|
|
- } elsif (!defined $conf->{dcc_dccifd_path_raw}) {
|
|
- dbg("dcc: dccifd is not available: no r/w dccifd socket found");
|
|
- } else {
|
|
- dbg("dcc: dccifd is not available: no r/w dccifd socket found: %s",
|
|
- $conf->{dcc_dccifd_path_raw});
|
|
}
|
|
}
|
|
|
|
- return $self->{dccifd_available};
|
|
+ $pgmpath = Mail::SpamAssassin::Util::find_executable_in_env_path($pgm);
|
|
+ if (defined $pgmpath) {
|
|
+ dbg("dcc: dcc_pgm_path, found %s in env.path: %s", $pgm,$pgmpath);
|
|
+ return $pgmpath;
|
|
+ }
|
|
+
|
|
+ # try dcc_home/bin, dcc_libexec, and some desperate last attempts
|
|
+ foreach my $dir ($conf->{dcc_home}.'/bin', $conf->{dcc_libexec},
|
|
+ '/usr/local/bin', '/usr/local/dcc', '/var/dcc') {
|
|
+ $pgmpath = $dir . '/' . $pgm;
|
|
+ if (-x $pgmpath) {
|
|
+ dbg("dcc: dcc_pgm_path, found %s in %s: %s", $pgm,$dir,$pgmpath);
|
|
+ return $pgmpath;
|
|
+ }
|
|
+ }
|
|
+
|
|
+ return;
|
|
}
|
|
|
|
-sub is_dccproc_available {
|
|
+sub is_dccifd_available {
|
|
my ($self) = @_;
|
|
my $conf = $self->{main}->{conf};
|
|
|
|
- $self->{dccproc_available} = 0;
|
|
+ # dccifd remains available until it breaks
|
|
+ return $self->{dccifd_available} if $self->{dccifd_available};
|
|
|
|
- if (!$conf->{use_dcc}) {
|
|
- dbg("dcc: dccproc is not available: use_dcc is false");
|
|
- return 0;
|
|
+ # deal with configured INET socket
|
|
+ if (defined $conf->{dcc_dccifd_host}) {
|
|
+ dbg("dcc: dccifd is available via INET socket [%s]:%s",
|
|
+ $conf->{dcc_dccifd_host}, $conf->{dcc_dccifd_port});
|
|
+ return ($self->{dccifd_available} = 1);
|
|
}
|
|
- my $dcchome = $conf->{dcc_home} || '';
|
|
- my $dccproc = $conf->{dcc_path} || '';
|
|
|
|
- if ($dccproc eq '' && ($dcchome ne '' && -x "$dcchome/bin/dccproc")) {
|
|
- $dccproc = "$dcchome/bin/dccproc";
|
|
+ # the first time here, compute a default local socket based on DCC home
|
|
+ # from self->find_dcc_home() called elsewhere
|
|
+ my $sockpath = $conf->{dcc_dccifd_socket};
|
|
+ if (!$sockpath) {
|
|
+ if ($conf->{dcc_dccifd_path_raw}) {
|
|
+ $sockpath = $conf->{dcc_dccifd_path_raw};
|
|
+ } else {
|
|
+ $sockpath = "$conf->{dcc_home}/dccifd";
|
|
}
|
|
- if ($dccproc eq '') {
|
|
- $dccproc = Mail::SpamAssassin::Util::find_executable_in_env_path('dccproc');
|
|
+ $conf->{dcc_dccifd_socket} = $sockpath;
|
|
}
|
|
|
|
- unless (defined $dccproc && $dccproc ne '' && -x $dccproc) {
|
|
- dbg("dcc: dccproc is not available: no dccproc executable found");
|
|
- return 0;
|
|
- }
|
|
+ # check the socket every time because it can appear and disappear
|
|
+ return ($self->{dccifd_available} = 1) if (-S $sockpath && -w _ && -r _);
|
|
|
|
- # remember any found dccproc
|
|
+ dbg("dcc: dccifd is not available; no r/w socket at %s", $sockpath);
|
|
+ return ($self->{dccifd_available} = 0);
|
|
+}
|
|
+
|
|
+sub is_dccproc_available {
|
|
+ my ($self) = @_;
|
|
+ my $conf = $self->{main}->{conf};
|
|
+
|
|
+ # dccproc remains (un)available so check only once
|
|
+ return $self->{dccproc_available} if defined $self->{dccproc_available};
|
|
+
|
|
+ my $dccproc = $conf->{dcc_path};
|
|
+ if (!defined $dccproc || $dccproc eq '') {
|
|
+ $dccproc = $self->dcc_pgm_path('dccproc');
|
|
$conf->{dcc_path} = $dccproc;
|
|
+ if (!$dccproc || ! -x $dccproc) {
|
|
+ dbg("dcc: dccproc is not available: no dccproc executable found");
|
|
+ return ($self->{dccproc_available} = 0);
|
|
+ }
|
|
+ }
|
|
|
|
- dbg("dcc: dccproc is available: %s", $conf->{dcc_path});
|
|
- $self->{dccproc_available} = 1;
|
|
- return 1;
|
|
+ dbg("dcc: %s is available", $conf->{dcc_path});
|
|
+ return ($self->{dccproc_available} = 1);
|
|
}
|
|
|
|
sub dccifd_connect {
|
|
- my($self) = @_;
|
|
+ my($self, $tag) = @_;
|
|
my $conf = $self->{main}->{conf};
|
|
my $sockpath = $conf->{dcc_dccifd_socket};
|
|
- my $host = $conf->{dcc_dccifd_host};
|
|
- my $port = $conf->{dcc_dccifd_port};
|
|
my $sock;
|
|
+
|
|
if (defined $sockpath) {
|
|
- dbg("dcc: connecting to a local socket %s", $sockpath);
|
|
- $sock = IO::Socket::UNIX->new(
|
|
- Type => SOCK_STREAM, Peer => $sockpath);
|
|
- $sock or die "dcc: failed to connect to a socket $sockpath: $!\n";
|
|
- } elsif (defined $host) {
|
|
- my $specified_path = $conf->{dcc_dccifd_path_raw};
|
|
- if ($host eq '') {
|
|
- die "dcc: empty host specification: $specified_path\n";
|
|
- }
|
|
- if (!defined $port || $port !~ /^\d+\z/ || $port < 1 || $port > 65535) {
|
|
- die "dcc: bad TCP port number: $specified_path\n";
|
|
- }
|
|
- my $is_inet4 = $host =~ /^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}\z/;
|
|
- if ($is_inet4) { # inet4 socket (IPv4 address)
|
|
- dbg("dcc: connecting to inet4 socket [%s]:%s", $host,$port);
|
|
- $sock = IO::Socket::INET->new(
|
|
- Proto => 'tcp', PeerAddr => $host, PeerPort => $port);
|
|
- } else {
|
|
- if (!defined $have_inet6) {
|
|
- $have_inet6 = eval { require IO::Socket::INET6 };
|
|
- $have_inet6 = 0 if !defined $have_inet6;
|
|
+ $sock = IO::Socket::UNIX->new(Type => SOCK_STREAM, Peer => $sockpath);
|
|
+ if ($sock) {
|
|
+ dbg("$tag connected to local socket %s", $sockpath);
|
|
+ return $sock;
|
|
}
|
|
- if (!$have_inet6) { # fallback to an inet4 socket (IPv4)
|
|
- dbg("dcc: connecting(2) to inet4 socket [%s]:%s", $host,$port);
|
|
- $sock = IO::Socket::INET->new(
|
|
- Proto => 'tcp', PeerAddr => $host, PeerPort => $port);
|
|
- } else { # inet6 socket (IPv6) or a host name
|
|
- dbg("dcc: connecting to inet6 socket [%s]:%s", $host,$port);
|
|
+ $self->{dccifd_available} = 0;
|
|
+ info("$tag failed to connect to local socket $sockpath");
|
|
+ return $sock
|
|
+ }
|
|
+
|
|
+ # must be TCP/IP
|
|
+ my $host = $conf->{dcc_dccifd_host};
|
|
+ my $port = $conf->{dcc_dccifd_port};
|
|
+
|
|
+ if ($conf->{dcc_dccifd_IPv6}) {
|
|
+ # try IPv6 if we can with a host name or non-IPv4 address
|
|
+ dbg("$tag connecting to inet6 socket [%s]:%s", $host,$port);
|
|
$sock = IO::Socket::INET6->new(
|
|
Proto => 'tcp', PeerAddr => $host, PeerPort => $port);
|
|
+ # fall back to IPv4 if that failed
|
|
}
|
|
+ if (!$sock) {
|
|
+ dbg("$tag connecting to inet4 socket [%s]:%s", $host, $port);
|
|
+ $sock = IO::Socket::INET->new(
|
|
+ Proto => 'tcp', PeerAddr => $host, PeerPort => $port);
|
|
}
|
|
- $sock or die "dcc: failed to connect to [$host]:$port : $!\n";
|
|
- } else {
|
|
- die "dcc: dccifd socket not provided: $conf->{dcc_dccifd_path_raw}\n";
|
|
- }
|
|
+
|
|
+ info("failed to connect to [$host]:$port : $!") if !$sock;
|
|
return $sock;
|
|
}
|
|
|
|
+# check for dccifd every time in case enough uses of dccproc starts dccifd
|
|
sub get_dcc_interface {
|
|
my ($self) = @_;
|
|
+ my $conf = $self->{main}->{conf};
|
|
|
|
- if ($self->is_dccifd_available()) {
|
|
- $self->{dcc_interface} = "dccifd";
|
|
- $self->{dcc_disabled} = 0;
|
|
- }
|
|
- elsif ($self->is_dccproc_available()) {
|
|
- $self->{dcc_interface} = "dccproc";
|
|
- $self->{dcc_disabled} = 0;
|
|
+ if (!$conf->{use_dcc}) {
|
|
+ $self->{dcc_disabled} = 1;
|
|
+ return;
|
|
}
|
|
- else {
|
|
- dbg("dcc: dccifd and dccproc are not available, disabling DCC");
|
|
- $self->{dcc_interface} = "none";
|
|
+
|
|
+ $self->find_dcc_home();
|
|
+ if (!$self->is_dccifd_available() && !$self->is_dccproc_available()) {
|
|
+ dbg("dcc: dccifd and dccproc are not available");
|
|
$self->{dcc_disabled} = 1;
|
|
}
|
|
+
|
|
+ $self->{dcc_disabled} = 0;
|
|
}
|
|
|
|
sub dcc_query {
|
|
- my ($self, $permsgstatus, $full) = @_;
|
|
+ my ($self, $permsgstatus, $fulltext) = @_;
|
|
|
|
$permsgstatus->{dcc_checked} = 1;
|
|
|
|
+ if (!$self->{main}->{conf}->{use_dcc}) {
|
|
+ dbg("dcc: DCC is not available: use_dcc is 0");
|
|
+ return;
|
|
+ }
|
|
+
|
|
# initialize valid tags
|
|
$permsgstatus->{tag_data}->{DCCB} = "";
|
|
$permsgstatus->{tag_data}->{DCCR} = "";
|
|
$permsgstatus->{tag_data}->{DCCREP} = "";
|
|
|
|
- # short-circuit if there's already a X-DCC header with value of
|
|
- # "bulk" from an upstream DCC check
|
|
- if ($permsgstatus->get('ALL') =~
|
|
- /^(X-DCC-([^:]{1,80})?-?Metrics:.*bulk.*)$/m) {
|
|
- $permsgstatus->{dcc_response} = $1;
|
|
+ if ($$fulltext eq '') {
|
|
+ dbg("dcc: empty message; skipping dcc check");
|
|
return;
|
|
}
|
|
|
|
- my $timer = $self->{main}->time_method("check_dcc");
|
|
+ if ($permsgstatus->get('ALL') =~ /^(X-DCC-.*-Metrics:.*)$/m) {
|
|
+ $permsgstatus->{dcc_raw_x_dcc} = $1;
|
|
+ # short-circuit if there is already a X-DCC header with value of
|
|
+ # "bulk" from an upstream DCC check
|
|
+ # require "bulk" because then at least one body checksum will be "many"
|
|
+ # and so we know the X-DCC header is not forged by spammers
|
|
+ return if $permsgstatus->{dcc_raw_x_dcc} =~ / bulk /;
|
|
+ }
|
|
|
|
- $self->find_dcc_home();
|
|
+ my $timer = $self->{main}->time_method("check_dcc");
|
|
|
|
$self->get_dcc_interface();
|
|
- my $result;
|
|
- if ($self->{dcc_disabled}) {
|
|
- $result = 0;
|
|
- } elsif ($$full eq '') {
|
|
- dbg("dcc: empty message, skipping dcc check");
|
|
- $result = 0;
|
|
- } elsif ($self->{dccifd_available}) {
|
|
- my $client = $permsgstatus->{relays_external}->[0]->{ip};
|
|
- my $clientname = $permsgstatus->{relays_external}->[0]->{rdns};
|
|
- my $helo = $permsgstatus->{relays_external}->[0]->{helo} || "";
|
|
- if ($client) {
|
|
- $client = $client . "\r" . $clientname if $clientname;
|
|
- } else {
|
|
- $client = "0.0.0.0";
|
|
- }
|
|
- $self->dccifd_lookup($permsgstatus, $full, $client, $clientname, $helo);
|
|
- } else {
|
|
- my $client = $permsgstatus->{relays_external}->[0]->{ip};
|
|
- $self->dccproc_lookup($permsgstatus, $full, $client);
|
|
- }
|
|
+ return if $self->{dcc_disabled};
|
|
+
|
|
+ my $envelope = $permsgstatus->{relays_external}->[0];
|
|
+ ($permsgstatus->{dcc_raw_x_dcc},
|
|
+ $permsgstatus->{dcc_cksums}) = $self->ask_dcc("dcc:", $permsgstatus,
|
|
+ $fulltext, $envelope);
|
|
}
|
|
|
|
sub check_dcc {
|
|
@@ -609,28 +681,27 @@
|
|
|
|
$self->dcc_query($permsgstatus, $full) if !$permsgstatus->{dcc_checked};
|
|
|
|
- my $response = $permsgstatus->{dcc_response};
|
|
- return 0 if !defined $response || $response eq '';
|
|
+ my $x_dcc = $permsgstatus->{dcc_raw_x_dcc};
|
|
+ return 0 if !defined $x_dcc || $x_dcc eq '';
|
|
|
|
- local($1,$2);
|
|
- if ($response =~ /^X-DCC-(.*)-Metrics: (.*)$/) {
|
|
- $permsgstatus->{tag_data}->{DCCB} = $1;
|
|
- $permsgstatus->{tag_data}->{DCCR} = $2;
|
|
+ if ($x_dcc =~ /^X-DCC-(.*)-Metrics: (.*)$/) {
|
|
+ $permsgstatus->set_tag('DCCB', $1);
|
|
+ $permsgstatus->set_tag('DCCR', $2);
|
|
}
|
|
- $response =~ s/many/999999/ig;
|
|
- $response =~ s/ok\d?/0/ig;
|
|
+ $x_dcc =~ s/many/999999/ig;
|
|
+ $x_dcc =~ s/ok\d?/0/ig;
|
|
|
|
my %count = (body => 0, fuz1 => 0, fuz2 => 0, rep => 0);
|
|
- if ($response =~ /\bBody=(\d+)/) {
|
|
+ if ($x_dcc =~ /\bBody=(\d+)/) {
|
|
$count{body} = $1+0;
|
|
}
|
|
- if ($response =~ /\bFuz1=(\d+)/) {
|
|
+ if ($x_dcc =~ /\bFuz1=(\d+)/) {
|
|
$count{fuz1} = $1+0;
|
|
}
|
|
- if ($response =~ /\bFuz2=(\d+)/) {
|
|
+ if ($x_dcc =~ /\bFuz2=(\d+)/) {
|
|
$count{fuz2} = $1+0;
|
|
}
|
|
- if ($response =~ /\brep=(\d+)/) {
|
|
+ if ($x_dcc =~ /\brep=(\d+)/) {
|
|
$count{rep} = $1+0;
|
|
}
|
|
if ($count{body} >= $conf->{dcc_body_max} ||
|
|
@@ -651,185 +722,185 @@
|
|
}
|
|
|
|
sub check_dcc_reputation_range {
|
|
- my ($self, $permsgstatus, $full, $min, $max) = @_;
|
|
- $self->dcc_query($permsgstatus, $full) if !$permsgstatus->{dcc_checked};
|
|
+ my ($self, $permsgstatus, $fulltext, $min, $max) = @_;
|
|
+
|
|
+ # this is called several times per message, so parse the X-DCC header once
|
|
+ my $dcc_rep = $permsgstatus->{dcc_rep};
|
|
+ if (!defined $dcc_rep) {
|
|
+ $self->dcc_query($permsgstatus, $fulltext) if !$permsgstatus->{dcc_checked};
|
|
+ my $x_dcc = $permsgstatus->{dcc_raw_x_dcc};
|
|
+ if (defined $x_dcc && $x_dcc =~ /\brep=(\d+)/) {
|
|
+ $dcc_rep = $1+0;
|
|
+ $permsgstatus->set_tag('DCCREP', $dcc_rep);
|
|
+ } else {
|
|
+ $dcc_rep = -1;
|
|
+ }
|
|
+ $permsgstatus->{dcc_rep} = $dcc_rep;
|
|
+ }
|
|
|
|
- my $response = $permsgstatus->{dcc_response};
|
|
- return 0 if !defined $response || $response eq '';
|
|
+ # no X-DCC header or no reputation in the X-DCC header, perhaps for lack
|
|
+ # of data in the DCC Reputation server
|
|
+ return 0 if $dcc_rep < 0;
|
|
|
|
+ # cover the entire range of reputations if not told otherwise
|
|
$min = 0 if !defined $min;
|
|
- $max = 999 if !defined $max;
|
|
+ $max = 100 if !defined $max;
|
|
|
|
- local $1;
|
|
- my $dcc_rep;
|
|
- $dcc_rep = $1+0 if defined $response && $response =~ /\brep=(\d+)/;
|
|
- if (defined $dcc_rep) {
|
|
- $dcc_rep = int($dcc_rep); # just in case, rule ranges are integer percents
|
|
my $result = $dcc_rep >= $min && $dcc_rep <= $max ? 1 : 0;
|
|
dbg("dcc: dcc_rep %s, min %s, max %s => result=%s",
|
|
$dcc_rep, $min, $max, $result?'YES':'no');
|
|
- $permsgstatus->{tag_data}->{DCCREP} = $dcc_rep;
|
|
- return $dcc_rep >= $min && $dcc_rep <= $max ? 1 : 0;
|
|
+ return $result;
|
|
+}
|
|
+
|
|
+# get the X-DCC header line and save the checksums from dccifd or dccproc
|
|
+sub parse_dcc_response {
|
|
+ my ($self, $resp) = @_;
|
|
+ my ($raw_x_dcc, $cksums);
|
|
+
|
|
+ # The first line is the header we want. It uses SMTP folded whitespace
|
|
+ # if it is long. The folded whitespace is always a single \t.
|
|
+ chomp($raw_x_dcc = shift @$resp);
|
|
+ my $v;
|
|
+ while (($v = shift @$resp) && $v =~ s/^\t(.+)\s*\n/ $1/) {
|
|
+ $raw_x_dcc .= $v;
|
|
+ }
|
|
+
|
|
+ # skip the "reported:" line between the X-DCC header and any checksums
|
|
+ # remove ':' to avoid a bug in versions 1.3.115 - 1.3.122 in dccsight
|
|
+ # with the length of "Message-ID:"
|
|
+ $cksums = '';
|
|
+ while (($v = shift @$resp) && $v =~ s/^([^:]*):/$1/) {
|
|
+ $cksums .= $v;
|
|
}
|
|
- return 0;
|
|
+
|
|
+ return ($raw_x_dcc, $cksums);
|
|
}
|
|
|
|
-sub dccifd_lookup {
|
|
- my ($self, $permsgstatus, $fulltext, $client, $clientname, $helo) = @_;
|
|
+sub ask_dcc {
|
|
+ my ($self, $tag, $permsgstatus, $fulltext, $envelope) = @_;
|
|
my $conf = $self->{main}->{conf};
|
|
- my $response;
|
|
- my $left;
|
|
- my $right;
|
|
- my $timeout = $conf->{dcc_timeout};
|
|
- my $opts = $conf->{dccifd_options};
|
|
- my @opts = !defined $opts ? () : split(' ',$opts);
|
|
+ my ($pgm, $err, $sock, $pid, @resp);
|
|
+ my ($client, $clientname, $helo, $opts);
|
|
|
|
$permsgstatus->enter_helper_run_mode();
|
|
|
|
+ my $timeout = $conf->{dcc_timeout};
|
|
my $timer = Mail::SpamAssassin::Timeout->new(
|
|
{ secs => $timeout, deadline => $permsgstatus->{master_deadline} });
|
|
- my $err = $timer->run_and_catch(sub {
|
|
|
|
+ $err = $timer->run_and_catch(sub {
|
|
local $SIG{PIPE} = sub { die "__brokenpipe__ignore__\n" };
|
|
|
|
- my $sock = $self->dccifd_connect();
|
|
- $sock or die "dcc: failed to connect to a dccifd socket";
|
|
-
|
|
- # send the options and other parameters to the daemon
|
|
- $sock->print("header " . join(" ",@opts) . "\n")
|
|
- or die "dcc: failed write"; # options
|
|
- $sock->print($client . "\n") or die "dcc: failed write"; # client
|
|
- $sock->print($helo . "\n") or die "dcc: failed write"; # HELO value
|
|
- $sock->print("\n") or die "dcc: failed write"; # sender
|
|
- $sock->print("unknown\r\n") or die "dcc: failed write"; # recipients
|
|
- $sock->print("\n") or die "dcc: failed write"; # recipients
|
|
-
|
|
- $sock->print($$fulltext) or die "dcc: failed write";
|
|
-
|
|
- $sock->shutdown(1) or die "dcc: failed socket shutdown: $!";
|
|
-
|
|
- $sock->getline() or die "dcc: failed read status";
|
|
- $sock->getline() or die "dcc: failed read multistatus";
|
|
+ # prefer dccifd to dccproc
|
|
+ if ($self->{dccifd_available}) {
|
|
+ $pgm = 'dccifd';
|
|
|
|
- my @null = $sock->getlines();
|
|
- if (!@null) {
|
|
- # no facility prefix on this
|
|
- die "dcc: failed to read header\n";
|
|
- }
|
|
+ $sock = $self->dccifd_connect($tag);
|
|
+ if (!$sock) {
|
|
+ $self->{dccifd_available} = 0;
|
|
+ die("dccproc not available") if (!$self->is_dccproc_available());
|
|
|
|
- # the first line will be the header we want to look at
|
|
- chomp($response = shift @null);
|
|
- # but newer versions of DCC fold the header if it's too long...
|
|
- while (my $v = shift @null) {
|
|
- last unless ($v =~ s/^\s+/ /); # if this line wasn't folded, stop
|
|
- chomp $v;
|
|
- $response .= $v;
|
|
+ # fall back on dccproc if the socket is an orphan from
|
|
+ # a killed dccifd daemon or some other obvious (no timeout) problem
|
|
+ dbg("$tag fall back on dccproc");
|
|
}
|
|
-
|
|
- dbg("dcc: dccifd got response: %s", $response);
|
|
-
|
|
- });
|
|
-
|
|
- $permsgstatus->leave_helper_run_mode();
|
|
-
|
|
- if ($timer->timed_out()) {
|
|
- dbg("dcc: dccifd check timed out after $timeout secs.");
|
|
- return;
|
|
}
|
|
|
|
- if ($err) {
|
|
- chomp $err;
|
|
- warn("dcc: dccifd -> check skipped: $err\n");
|
|
- return;
|
|
- }
|
|
+ if ($self->{dccifd_available}) {
|
|
|
|
- if (!defined $response || $response !~ /^X-DCC/) {
|
|
- dbg("dcc: dccifd check failed - no X-DCC returned: %s", $response);
|
|
- return;
|
|
+ # send the options and other parameters to the daemon
|
|
+ $client = $envelope->{ip};
|
|
+ $clientname = $envelope->{rdns};
|
|
+ if (!defined $client) {
|
|
+ $client = '';
|
|
+ } else {
|
|
+ $client .= ("\r" . $clientname) if defined $clientname;
|
|
}
|
|
+ $helo = $envelope->{helo} || '';
|
|
+ if ($tag ne "dcc:") {
|
|
+ $opts = $self->{dccifd_report_options}
|
|
+ } else {
|
|
+ $opts = $self->{dccifd_lookup_options};
|
|
+ # only query if there is an X-DCC header
|
|
+ $opts =~ s/grey-off/& query/ if defined $permsgstatus->{dcc_raw_x_dcc};
|
|
+ }
|
|
+ $sock->print($opts) or die "failed write options\n";
|
|
+ $sock->print($client . "\n") or die "failed write SMTP client\n";
|
|
+ $sock->print($helo . "\n") or die "failed write HELO value\n";
|
|
+ $sock->print("\n") or die "failed write sender\n";
|
|
+ $sock->print("unknown\n\n") or die "failed write 1 recipient\n";
|
|
+ $sock->print($$fulltext) or die "failed write mail message\n";
|
|
+ $sock->shutdown(1) or die "failed socket shutdown: $!";
|
|
|
|
- $response =~ s/[ \t]\z//; # strip trailing whitespace
|
|
- $permsgstatus->{dcc_response} = $response;
|
|
-}
|
|
+ $sock->getline() or die "failed read status\n";
|
|
+ $sock->getline() or die "failed read multistatus\n";
|
|
|
|
-sub dccproc_lookup {
|
|
- my ($self, $permsgstatus, $fulltext, $client) = @_;
|
|
- my $conf = $self->{main}->{conf};
|
|
- my $response;
|
|
- my %count = (body => 0, fuz1 => 0, fuz2 => 0, rep => 0);
|
|
- my $timeout = $conf->{dcc_timeout};
|
|
+ @resp = $sock->getlines();
|
|
+ die "failed to read dccifd response\n" if !@resp;
|
|
|
|
- $permsgstatus->enter_helper_run_mode();
|
|
-
|
|
- # use a temp file here -- open2() is unreliable, buffering-wise, under spamd
|
|
+ } else {
|
|
+ $pgm = 'dccproc';
|
|
+ # use a temp file -- open2() is unreliable, buffering-wise, under spamd
|
|
+ # first ensure that we do not hit a stray file from some other filter.
|
|
+ $permsgstatus->delete_fulltext_tmpfile();
|
|
my $tmpf = $permsgstatus->create_fulltext_tmpfile($fulltext);
|
|
- my $pid;
|
|
-
|
|
- my $timer = Mail::SpamAssassin::Timeout->new(
|
|
- { secs => $timeout, deadline => $permsgstatus->{master_deadline} });
|
|
- my $err = $timer->run_and_catch(sub {
|
|
-
|
|
- local $SIG{PIPE} = sub { die "__brokenpipe__ignore__\n" };
|
|
|
|
- # note: not really tainted, this came from system configuration file
|
|
- my $path = untaint_file_path($conf->{dcc_path});
|
|
-
|
|
- my $opts = $conf->{dcc_options};
|
|
+ my $path = $conf->{dcc_path};
|
|
+ $opts = $conf->{dcc_options};
|
|
my @opts = !defined $opts ? () : split(' ',$opts);
|
|
untaint_var(\@opts);
|
|
+ unshift(@opts, '-w', 'whiteclnt');
|
|
+ $client = $envelope->{ip};
|
|
+ if ($client) {
|
|
+ unshift(@opts, '-a', untaint_var($client));
|
|
+ } else {
|
|
+ # get external relay IP address from Received: header if not available
|
|
+ unshift(@opts, '-R');
|
|
+ }
|
|
+ if ($tag eq "dcc:") {
|
|
+ # query instead of report if there is an X-DCC header from upstream
|
|
+ unshift(@opts, '-Q') if defined $permsgstatus->{dcc_raw_x_dcc};
|
|
+ } else {
|
|
+ # learn or report spam
|
|
+ unshift(@opts, '-t', 'many');
|
|
+ }
|
|
|
|
- unshift(@opts, "-a",
|
|
- untaint_var($client)) if defined $client && $client ne '';
|
|
-
|
|
- dbg("dcc: opening pipe: %s",
|
|
- join(' ', $path, "-H", "-x", "0", @opts, "< $tmpf"));
|
|
+ dbg("$tag opening pipe to %s",
|
|
+ join(' ', $path, "-C", "-x", "0", @opts, "<$tmpf"));
|
|
|
|
$pid = Mail::SpamAssassin::Util::helper_app_pipe_open(*DCC,
|
|
- $tmpf, 1, $path, "-H", "-x", "0", @opts);
|
|
+ $tmpf, 1, $path, "-C", "-x", "0", @opts);
|
|
$pid or die "$!\n";
|
|
|
|
# read+split avoids a Perl I/O bug (Bug 5985)
|
|
my($inbuf,$nread,$resp); $resp = '';
|
|
while ( $nread=read(DCC,$inbuf,8192) ) { $resp .= $inbuf }
|
|
defined $nread or die "error reading from pipe: $!";
|
|
- my @null = split(/^/m, $resp, -1); undef $resp;
|
|
+ @resp = split(/^/m, $resp, -1); undef $resp;
|
|
|
|
my $errno = 0; close DCC or $errno = $!;
|
|
proc_status_ok($?,$errno)
|
|
- or info("dcc: [%s] finished: %s", $pid, exit_status_str($?,$errno));
|
|
-
|
|
- if (!@null) {
|
|
- # no facility prefix on this
|
|
- die "failed to read header\n";
|
|
- }
|
|
+ or info("$tag [%s] finished: %s", $pid, exit_status_str($?,$errno));
|
|
|
|
- # the first line will be the header we want to look at
|
|
- chomp($response = shift @null);
|
|
- # but newer versions of DCC fold the header if it's too long...
|
|
- while (my $v = shift @null) {
|
|
- last unless ($v =~ s/^\s+/ /); # if this line wasn't folded, stop
|
|
- chomp $v;
|
|
- $response .= $v;
|
|
+ die "failed to read X-DCC header from dccproc\n" if !@resp;
|
|
}
|
|
-
|
|
- unless (defined($response)) {
|
|
- # no facility prefix on this
|
|
- die "no response\n"; # yes, this is possible
|
|
- }
|
|
-
|
|
- dbg("dcc: got response: %s", $response);
|
|
-
|
|
});
|
|
|
|
+ if ($pgm eq 'dccproc') {
|
|
if (defined(fileno(*DCC))) { # still open
|
|
if ($pid) {
|
|
- if (kill('TERM',$pid)) { dbg("dcc: killed stale helper [$pid]") }
|
|
- else { dbg("dcc: killing helper application [$pid] failed: $!") }
|
|
+ if (kill('TERM',$pid)) {
|
|
+ dbg("$tag killed stale dccproc process [$pid]")
|
|
+ } else {
|
|
+ dbg("$tag killing dccproc process [$pid] failed: $!")
|
|
+ }
|
|
}
|
|
my $errno = 0; close(DCC) or $errno = $!;
|
|
- proc_status_ok($?,$errno)
|
|
- or info("dcc: [%s] terminated: %s", $pid, exit_status_str($?,$errno));
|
|
+ proc_status_ok($?,$errno) or info("$tag [%s] dccproc terminated: %s",
|
|
+ $pid, exit_status_str($?,$errno));
|
|
+ }
|
|
}
|
|
+
|
|
$permsgstatus->leave_helper_run_mode();
|
|
|
|
if ($timer->timed_out()) {
|
|
@@ -833,204 +904,182 @@
|
|
$permsgstatus->leave_helper_run_mode();
|
|
|
|
if ($timer->timed_out()) {
|
|
- dbg("dcc: check timed out after $timeout seconds");
|
|
- return;
|
|
+ dbg("$tag $pgm timed out after $timeout seconds");
|
|
+ return (undef, undef);
|
|
}
|
|
|
|
if ($err) {
|
|
chomp $err;
|
|
- if ($err eq "__brokenpipe__ignore__") {
|
|
- dbg("dcc: check failed: broken pipe");
|
|
- } elsif ($err eq "no response") {
|
|
- dbg("dcc: check failed: no response");
|
|
- } else {
|
|
- warn("dcc: check failed: $err\n");
|
|
- }
|
|
- return;
|
|
+ info("$tag $pgm failed: $err\n");
|
|
+ return (undef, undef);
|
|
}
|
|
|
|
- if (!defined($response) || $response !~ /^X-DCC/) {
|
|
- $response ||= '';
|
|
- dbg("dcc: check failed: no X-DCC returned (did you create a map file?): %s", $response);
|
|
- return;
|
|
+ my ($raw_x_dcc, $cksums) = $self->parse_dcc_response(\@resp);
|
|
+ if (!defined $raw_x_dcc || $raw_x_dcc !~ /^X-DCC/) {
|
|
+ info("$tag instead of X-DCC header, $pgm returned '%s'", $raw_x_dcc);
|
|
+ return (undef, undef);
|
|
}
|
|
-
|
|
- $permsgstatus->{dcc_response} = $response;
|
|
+ dbg("$tag %s responded with '%s'", $pgm, $raw_x_dcc);
|
|
+ return ($raw_x_dcc, $cksums);
|
|
}
|
|
|
|
-# only supports dccproc right now
|
|
-sub plugin_report {
|
|
+# tell DCC server that the message is spam according to SpamAssassin
|
|
+sub check_post_learn {
|
|
my ($self, $options) = @_;
|
|
|
|
- return if $options->{report}->{options}->{dont_report_to_dcc};
|
|
- $self->get_dcc_interface();
|
|
- return if $self->{dcc_disabled};
|
|
-
|
|
- # get the metadata from the message so we can pass the external relay information
|
|
- $options->{msg}->extract_message_metadata($options->{report}->{main});
|
|
- my $client = $options->{msg}->{metadata}->{relays_external}->[0]->{ip};
|
|
- if ($self->{dccifd_available}) {
|
|
- my $clientname = $options->{msg}->{metadata}->{relays_external}->[0]->{rdns};
|
|
- my $helo = $options->{msg}->{metadata}->{relays_external}->[0]->{helo} || "";
|
|
- if ($client) {
|
|
- if ($clientname) {
|
|
- $client = $client . "\r" . $clientname;
|
|
- }
|
|
- } else {
|
|
- $client = "0.0.0.0";
|
|
- }
|
|
- if ($self->dccifd_report($options, $options->{text}, $client, $helo)) {
|
|
- $options->{report}->{report_available} = 1;
|
|
- info("reporter: spam reported to DCC");
|
|
- $options->{report}->{report_return} = 1;
|
|
+ # learn only if allowed
|
|
+ return if $self->{learn_disabled};
|
|
+ my $conf = $self->{main}->{conf};
|
|
+ if (!$conf->{use_dcc}) {
|
|
+ $self->{learn_disabled} = 1;
|
|
+ return;
|
|
}
|
|
- else {
|
|
- info("reporter: could not report spam to DCC via dccifd");
|
|
+ my $learn_score = $conf->{dcc_learn_score};
|
|
+ if (!defined $learn_score || $learn_score eq '') {
|
|
+ dbg("dcc: DCC learning not enabled by dcc_learn_score");
|
|
+ $self->{learn_disabled} = 1;
|
|
+ return;
|
|
}
|
|
- } else {
|
|
- # use temporary file: open2() is unreliable due to buffering under spamd
|
|
- my $tmpf = $options->{report}->create_fulltext_tmpfile($options->{text});
|
|
|
|
- if ($self->dcc_report($options, $tmpf, $client)) {
|
|
- $options->{report}->{report_available} = 1;
|
|
- info("reporter: spam reported to DCC");
|
|
- $options->{report}->{report_return} = 1;
|
|
+ # and if SpamAssassin concluded that the message is spam
|
|
+ # worse than our threshold
|
|
+ my $permsgstatus = $options->{permsgstatus};
|
|
+ if ($permsgstatus->is_spam()) {
|
|
+ my $score = $permsgstatus->get_score();
|
|
+ my $required_score = $permsgstatus->get_required_score();
|
|
+ if ($score < $required_score + $learn_score) {
|
|
+ dbg("dcc: score=%d required_score=%d dcc_learn_score=%d",
|
|
+ $score, $required_score, $learn_score);
|
|
+ return;
|
|
}
|
|
- else {
|
|
- info("reporter: could not report spam to DCC via dccproc");
|
|
}
|
|
- $options->{report}->delete_fulltext_tmpfile();
|
|
+
|
|
+ # and if we checked the message
|
|
+ return if (!defined $permsgstatus->{dcc_raw_x_dcc});
|
|
+
|
|
+ # and if the DCC server thinks it was not spam
|
|
+ if ($permsgstatus->{dcc_raw_x_dcc} !~ /\b(Body|Fuz1|Fuz2)=\d/) {
|
|
+ dbg("dcc: already known as spam; no need to learn");
|
|
+ return;
|
|
}
|
|
+
|
|
+ # dccsight is faster than dccifd or dccproc if we have checksums,
|
|
+ # which we do not have with dccifd before 1.3.123
|
|
+ my $old_cksums = $permsgstatus->{dcc_cksums};
|
|
+ return if ($old_cksums && $self->dccsight_learn($permsgstatus, $old_cksums));
|
|
+
|
|
+ # Fall back on dccifd or dccproc without saved checksums or dccsight.
|
|
+ # get_dcc_interface() was called when the message was checked
|
|
+
|
|
+ # is getting the full text this way kosher? Is get_pristine() public?
|
|
+ my $fulltext = $permsgstatus->{msg}->get_pristine();
|
|
+ my $envelope = $permsgstatus->{relays_external}->[0];
|
|
+ my ($raw_x_dcc, $cksums) = $self->ask_dcc("dcc: learn:", $permsgstatus,
|
|
+ \$fulltext, $envelope);
|
|
+ dbg("dcc: learned as spam") if defined $raw_x_dcc;
|
|
}
|
|
|
|
-sub dccifd_report {
|
|
- my ($self, $options, $fulltext, $client, $helo) = @_;
|
|
- my $conf = $self->{main}->{conf};
|
|
- my $timeout = $conf->{dcc_timeout};
|
|
- # instead of header use whatever the report option is
|
|
- my $opts = $conf->{dccifd_options};
|
|
- my @opts = !defined $opts ? () : split(' ',$opts);
|
|
+sub dccsight_learn {
|
|
+ my ($self, $permsgstatus, $old_cksums) = @_;
|
|
+ my ($raw_x_dcc, $new_cksums);
|
|
+
|
|
+ return 0 if !$old_cksums;
|
|
+
|
|
+ my $dccsight = $self->dcc_pgm_path('dccsight');
|
|
+ if (!$dccsight) {
|
|
+ info("dcc: cannot find dccsight") if $dccsight eq '';
|
|
+ return 0;
|
|
+ }
|
|
|
|
- $options->{report}->enter_helper_run_mode();
|
|
- my $timer = Mail::SpamAssassin::Timeout->new({ secs => $timeout });
|
|
+ $permsgstatus->enter_helper_run_mode();
|
|
|
|
- my $err = $timer->run_and_catch(sub {
|
|
+ # use a temp file here -- open2() is unreliable, buffering-wise, under spamd
|
|
+ # ensure that we do not hit a stray file from some other filter.
|
|
+ $permsgstatus->delete_fulltext_tmpfile();
|
|
+ my $tmpf = $permsgstatus->create_fulltext_tmpfile(\$old_cksums);
|
|
+ my $pid;
|
|
|
|
+ my $timeout = $self->{main}->{conf}->{dcc_timeout};
|
|
+ my $timer = Mail::SpamAssassin::Timeout->new(
|
|
+ { secs => $timeout, deadline => $permsgstatus->{master_deadline} });
|
|
+ my $err = $timer->run_and_catch(sub {
|
|
local $SIG{PIPE} = sub { die "__brokenpipe__ignore__\n" };
|
|
|
|
- my $sock = $self->dccifd_connect();
|
|
- $sock or die "report: failed to connect to a dccifd socket";
|
|
+ dbg("dcc: opening pipe to %s",
|
|
+ join(' ', $dccsight, "-t", "many", "<$tmpf"));
|
|
|
|
- # send the options and other parameters to the daemon
|
|
- $sock->print("spam " . join(" ",@opts) . "\n")
|
|
- or die "report: dccifd failed write"; # options
|
|
- $sock->print($client . "\n")
|
|
- or die "report: dccifd failed write"; # client
|
|
- $sock->print($helo . "\n")
|
|
- or die "report: dccifd failed write"; # HELO value
|
|
- $sock->print("\n")
|
|
- or die "report: dccifd failed write"; # sender
|
|
- $sock->print("unknown\r\n")
|
|
- or die "report: dccifd failed write"; # recipients
|
|
- $sock->print("\n")
|
|
- or die "report: dccifd failed write"; # recipients
|
|
+ $pid = Mail::SpamAssassin::Util::helper_app_pipe_open(*DCC,
|
|
+ $tmpf, 1, $dccsight, "-t", "many");
|
|
+ $pid or die "$!\n";
|
|
|
|
- $sock->print($$fulltext) or die "report: dccifd failed write";
|
|
+ # read+split avoids a Perl I/O bug (Bug 5985)
|
|
+ my($inbuf,$nread,$resp); $resp = '';
|
|
+ while ( $nread=read(DCC,$inbuf,8192) ) { $resp .= $inbuf }
|
|
+ defined $nread or die "error reading from pipe: $!";
|
|
+ my @resp = split(/^/m, $resp, -1); undef $resp;
|
|
|
|
- $sock->shutdown(1) or die "report: dccifd failed socket shutdown: $!";
|
|
+ my $errno = 0; close DCC or $errno = $!;
|
|
+ proc_status_ok($?,$errno)
|
|
+ or info("dcc: [%s] finished: %s", $pid, exit_status_str($?,$errno));
|
|
|
|
- $sock->getline() or die "report: dccifd failed read status";
|
|
- $sock->getline() or die "report: dccifd failed read multistatus";
|
|
+ die "dcc: failed to read learning response\n" if !@resp;
|
|
|
|
- my @ignored = $sock->getlines();
|
|
+ ($raw_x_dcc, $new_cksums) = $self->parse_dcc_response(\@resp);
|
|
});
|
|
|
|
- $options->{report}->leave_helper_run_mode();
|
|
+ if (defined(fileno(*DCC))) { # still open
|
|
+ if ($pid) {
|
|
+ if (kill('TERM',$pid)) {
|
|
+ dbg("dcc: killed stale dccsight process [$pid]")
|
|
+ } else {
|
|
+ dbg("dcc: killing stale dccsight process [$pid] failed: $!") }
|
|
+ }
|
|
+ my $errno = 0; close(DCC) or $errno = $!;
|
|
+ proc_status_ok($?,$errno) or info("dcc: dccsight [%s] terminated: %s",
|
|
+ $pid, exit_status_str($?,$errno));
|
|
+ }
|
|
+ $permsgstatus->delete_fulltext_tmpfile();
|
|
+ $permsgstatus->leave_helper_run_mode();
|
|
|
|
if ($timer->timed_out()) {
|
|
- dbg("reporter: DCC report via dccifd timed out after $timeout secs.");
|
|
+ dbg("dcc: dccsight timed out after $timeout seconds");
|
|
return 0;
|
|
}
|
|
|
|
if ($err) {
|
|
chomp $err;
|
|
- if ($err eq "__brokenpipe__ignore__") {
|
|
- dbg("reporter: DCC report via dccifd failed: broken pipe");
|
|
- } else {
|
|
- warn("reporter: DCC report via dccifd failed: $err\n");
|
|
- }
|
|
+ info("dcc: dccsight failed: $err\n");
|
|
return 0;
|
|
}
|
|
|
|
+ if ($raw_x_dcc) {
|
|
+ dbg("dcc: learned response: %s", $raw_x_dcc);
|
|
return 1;
|
|
-}
|
|
-
|
|
-sub dcc_report {
|
|
- my ($self, $options, $tmpf, $client) = @_;
|
|
- my $conf = $self->{main}->{conf};
|
|
- my $timeout = $options->{report}->{conf}->{dcc_timeout};
|
|
-
|
|
- # note: not really tainted, this came from system configuration file
|
|
- my $path = untaint_file_path($options->{report}->{conf}->{dcc_path});
|
|
- my $opts = $conf->{dcc_options};
|
|
- my @opts = !defined $opts ? () : split(' ',$opts);
|
|
- untaint_var(\@opts);
|
|
-
|
|
- # get the metadata from the message so we can pass the external relay info
|
|
-
|
|
- unshift(@opts, "-a",
|
|
- untaint_var($client)) if defined $client && $client ne '';
|
|
-
|
|
- my $timer = Mail::SpamAssassin::Timeout->new({ secs => $timeout });
|
|
-
|
|
- $options->{report}->enter_helper_run_mode();
|
|
- my $err = $timer->run_and_catch(sub {
|
|
-
|
|
- local $SIG{PIPE} = sub { die "__brokenpipe__ignore__\n" };
|
|
-
|
|
- dbg("report: opening pipe: %s",
|
|
- join(' ', $path, "-H", "-t", "many", "-x", "0", @opts, "< $tmpf"));
|
|
-
|
|
- my $pid = Mail::SpamAssassin::Util::helper_app_pipe_open(*DCC,
|
|
- $tmpf, 1, $path, "-H", "-t", "many", "-x", "0", @opts);
|
|
- $pid or die "$!\n";
|
|
+ }
|
|
|
|
- my($inbuf,$nread,$nread_all); $nread_all = 0;
|
|
- # response is ignored, just check its existence
|
|
- while ( $nread=read(DCC,$inbuf,8192) ) { $nread_all += $nread }
|
|
- defined $nread or die "error reading from pipe: $!";
|
|
+ return 0;
|
|
+}
|
|
|
|
- dbg("dcc: empty response") if $nread_all < 1;
|
|
+sub plugin_report {
|
|
+ my ($self, $options) = @_;
|
|
|
|
- my $errno = 0; close DCC or $errno = $!;
|
|
- # closing a pipe also waits for the process executing on the pipe to
|
|
- # complete, no need to explicitly call waitpid
|
|
- # my $child_stat = waitpid($pid,0) > 0 ? $? : undef;
|
|
- proc_status_ok($?,$errno)
|
|
- or die "dcc: reporter error: ".exit_status_str($?,$errno)."\n";
|
|
- });
|
|
- $options->{report}->leave_helper_run_mode();
|
|
+ return if $options->{report}->{options}->{dont_report_to_dcc};
|
|
+ $self->get_dcc_interface();
|
|
+ return if $self->{dcc_disabled};
|
|
|
|
- if ($timer->timed_out()) {
|
|
- dbg("reporter: DCC report via dccproc timed out after $timeout seconds");
|
|
- return 0;
|
|
- }
|
|
+ # get the metadata from the message so we can report the external relay
|
|
+ $options->{msg}->extract_message_metadata($options->{report}->{main});
|
|
+ my $envelope = $options->{msg}->{metadata}->{relays_external}->[0];
|
|
+ my ($raw_x_dcc, $cksums) = $self->ask_dcc("reporter:", $options->{report},
|
|
+ $options->{text}, $envelope);
|
|
|
|
- if ($err) {
|
|
- chomp $err;
|
|
- if ($err eq "__brokenpipe__ignore__") {
|
|
- dbg("reporter: DCC report via dccproc failed: broken pipe");
|
|
+ if (defined $raw_x_dcc) {
|
|
+ $options->{report}->{report_available} = 1;
|
|
+ info("reporter: spam reported to DCC");
|
|
+ $options->{report}->{report_return} = 1;
|
|
} else {
|
|
- warn("reporter: DCC report via dccproc failed: $err\n");
|
|
+ info("reporter: could not report spam to DCC");
|
|
}
|
|
- return 0;
|
|
- }
|
|
-
|
|
- return 1;
|
|
}
|
|
|
|
1;
|
|
-
|
|
-=back
|
|
-
|
|
-=cut
|