1 | #!/usr/bin/perl |
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2 | |
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3 | use Sendmail::Milter; |
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4 | |
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5 | my %my_milter_callbacks = ( |
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6 | 'eom' => \&my_eom_callback, |
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7 | ); |
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8 | |
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9 | sub find_uid { |
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10 | my ($addr, $port) = @_; |
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11 | my $file; |
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12 | my $search; |
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13 | # TODO(quentin): These search strings are probably arch-specific. |
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14 | if ($addr eq "::1") { |
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15 | $file = "/proc/net/tcp6"; |
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16 | $search = sprintf("00000000000000000000000001000000:%04X", $port); |
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17 | } elsif ($addr eq "127.0.0.1") { |
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18 | $file = "/proc/net/tcp"; |
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19 | $search = sprintf("0100007F:%04X", $port); |
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20 | } else { |
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21 | return undef; |
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22 | } |
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23 | my $fh = IO::File->new($file, "r") or die "Cannot read $file: $!"; |
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24 | <$fh>; # Eat header |
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25 | while (my $line = <$fh>) { |
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26 | my @parts = split(" ", $line); |
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27 | if ($parts[1] eq $search) { |
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28 | return $parts[7]; |
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29 | } |
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30 | } |
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31 | return undef; # Not found. |
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32 | } |
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33 | |
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34 | sub my_eom_callback { |
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35 | my ($ctx) = @_; |
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36 | |
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37 | my $queueid = $ctx->getsymval('i'); |
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38 | |
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39 | my $addr = $ctx->getsymval('{client_addr}'); |
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40 | my $port = $ctx->getsymval('{client_port}'); |
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41 | |
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42 | my $uid = find_uid($addr, $port); |
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43 | |
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44 | printf STDERR "Received message from %s:%s (uid %d) (queue ID %s)\n", $addr, $port, $uid, $queueid; |
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45 | |
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46 | return SMFIS_ACCEPT; |
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47 | } |
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48 | |
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49 | Sendmail::Milter::setconn("local:/var/run/scripts-milter.sock"); |
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50 | Sendmail::Milter::register("scripts", |
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51 | \%my_milter_callbacks, SMFI_CURR_ACTS); |
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52 | |
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53 | Sendmail::Milter::main(); |
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