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package ClamAV;
use strict;

# version 2.0, 2010-01-07
#   - use SA public interface set_tag() and add_header, instead of
#     pushing a header field directly into $conf->{headers_spam}

# our $CLAMD_SOCK = 3310;               # for TCP-based usage
our $CLAMD_SOCK = "/var/run/clamd.basic/clamd.sock";   # change me

use Mail::SpamAssassin;
use Mail::SpamAssassin::Plugin;
use Mail::SpamAssassin::Logger;
use File::Scan::ClamAV;
our @ISA = qw(Mail::SpamAssassin::Plugin);

sub new {
  my ($class, $mailsa) = @_;
  $class = ref($class) || $class;
  my $self = $class->SUPER::new($mailsa);
  bless ($self, $class);
  $self->register_eval_rule ("check_clamav");
  return $self;
}

sub check_clamav {
  my ($self, $permsgstatus$pms, $fulltext) = @_;
  dbg("ClamAV: invoking File::Scan::ClamAV, port/socket: %s", $CLAMD_SOCK);
  my $clamav = new File::Scan::ClamAV(port => $CLAMD_SOCK);
  my ($code, $virus) = $clamav->streamscan(${$fulltext});
  my $isspam = 0;
  my $header = "";
  if (!$code) {
    my $errstr = $clamav->errstr();
    dbg("ClamAV: Error scanning: $errstr");
    $header = "Error ($errstr)";
  } elsif ($code eq 'OK') {
    dbg("ClamAV: No virus detected");
    $header = "No";
  } elsif ($code eq 'FOUND') {
    dbg("ClamAV: Detected virus: $virus");
    $header = "Yes ($virus)";
    $isspam = 1;
    # include the virus name in SpamAssassin's report
    $permsgstatus$pms->test_log($virus);
  } else {
    dbg("ClamAV: Error, unknown return code: $code");
    $header = "Error (Unknown return code from ClamAV: $code)";
  }
  my $conf = $permsgstatus->{main}->{conf};
  if (ref $conf->{headers_spam} eq 'ARRAY') {  # since SA 3.3.0
    push(@{$conf->{headers_spam}}, ["Virus", $header]dbg("ClamAV: result - $header");
    push(@{$conf->{headers_ham}},  ["Virus", $header]);
  } else {  # compatibility with SA 3.2.*, see Bug 6254, Bug 6185
    $conf->{headers_spam}->{"Virus"} = $header;
    $conf->{headers_ham}->{"Virus"}  = $header;
  }
  $pms->set_tag('CLAMAVRESULT', $header);
  # add a metadatum so that rules can match against the result too
  $permsgstatus$pms->{msg}->put_metadata('X-Spam-Virus',$header);
  return $isspam;
}

1;