/usr/lib/x86_64-linux-gnu/perl5/5.26/Sendmail/sample.pl is in libsendmail-milter-perl 0.18-8build3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 | use ExtUtils::testlib;
use Sendmail::Milter;
use Socket;
#
# Each of these callbacks is actually called with a first argument
# that is blessed into the pseudo-package Sendmail::Milter::Context. You can
# use them like object methods of package Sendmail::Milter::Context.
#
# $ctx is a blessed reference of package Sendmail::Milter::Context to something
# yucky, but the Mail Filter API routines are available as object methods
# (sans the smfi_ prefix) from this
#
sub connect_callback
{
my $ctx = shift; # Some people think of this as $self
my $hostname = shift;
my $sockaddr_in = shift;
my ($port, $iaddr);
print "my_connect:\n";
print " + hostname: '$hostname'\n";
if (defined $sockaddr_in)
{
($port, $iaddr) = sockaddr_in($sockaddr_in);
print " + port: '$port'\n";
print " + iaddr: '" . inet_ntoa($iaddr) . "'\n";
}
print " + callback completed.\n";
return SMFIS_CONTINUE;
}
sub helo_callback
{
my $ctx = shift;
my $helohost = shift;
print "my_helo:\n";
print " + helohost: '$helohost'\n";
print " + callback completed.\n";
return SMFIS_CONTINUE;
}
sub envfrom_callback
{
my $ctx = shift;
my @args = @_;
my $message = "";
print "my_envfrom:\n";
print " + args: '" . join(', ', @args) . "'\n";
$ctx->setpriv(\$message);
print " + private data allocated.\n";
print " + callback completed.\n";
return SMFIS_CONTINUE;
}
sub envrcpt_callback
{
my $ctx = shift;
my @args = @_;
print "my_envrcpt:\n";
print " + args: '" . join(', ', @args) . "'\n";
print " + callback completed.\n";
return SMFIS_CONTINUE;
}
sub header_callback
{
my $ctx = shift;
my $headerf = shift;
my $headerv = shift;
print "my_header:\n";
print " + field: '$headerf'\n";
print " + value: '$headerv'\n";
print " + callback completed.\n";
return SMFIS_CONTINUE;
}
sub eoh_callback
{
my $ctx = shift;
print "my_eoh:\n";
print " + callback completed.\n";
return SMFIS_CONTINUE;
}
sub body_callback
{
my $ctx = shift;
my $body_chunk = shift;
my $len = shift;
my $message_ref = $ctx->getpriv();
# Note: You don't need $len to have a good time.
# But it's there if you like.
print "my_body:\n";
print " + chunk len: $len\n";
${$message_ref} .= $body_chunk;
$ctx->setpriv($message_ref);
print " + callback completed.\n";
return SMFIS_CONTINUE;
}
sub eom_callback
{
my $ctx = shift;
my $message_ref = $ctx->getpriv();
my $chunk;
print "my_eom:\n";
print " + adding line to message body...\n";
# Let's have some fun...
# Note: This doesn't support messages with MIME data.
# Pig-Latin, Babelfish, Double dutch, soo many possibilities!
# But we're boring...
${$message_ref} .= "---> Append me to this message body!\r\n";
if (not $ctx->replacebody(${$message_ref}))
{
print " - write error!\n";
last;
}
$ctx->setpriv(undef);
print " + private data cleared.\n";
print " + callback completed.\n";
return SMFIS_CONTINUE;
}
sub abort_callback
{
my $ctx = shift;
print "my_abort:\n";
$ctx->setpriv(undef);
print " + private data cleared.\n";
print " + callback completed.\n";
return SMFIS_CONTINUE;
}
sub close_callback
{
my $ctx = shift;
print "my_close:\n";
print " + callback completed.\n";
return SMFIS_CONTINUE;
}
my %my_callbacks =
(
'connect' => \&connect_callback,
'helo' => \&helo_callback,
'envfrom' => \&envfrom_callback,
'envrcpt' => \&envrcpt_callback,
'header' => \&header_callback,
'eoh' => \&eoh_callback,
'body' => \&body_callback,
'eom' => \&eom_callback,
'abort' => \&abort_callback,
'close' => \&close_callback,
);
BEGIN:
{
if (scalar(@ARGV) < 2)
{
print "Usage: perl $0 <name_of_filter> <path_to_sendmail.cf>\n";
exit;
}
my $conn = Sendmail::Milter::auto_getconn($ARGV[0], $ARGV[1]);
print "Found connection info for '$ARGV[0]': $conn\n";
if ($conn =~ /^local:(.+)$/)
{
my $unix_socket = $1;
if (-e $unix_socket)
{
print "Attempting to unlink UNIX socket '$conn' ... ";
if (unlink($unix_socket) == 0)
{
print "failed.\n";
exit;
}
print "successful.\n";
}
}
if (not Sendmail::Milter::auto_setconn($ARGV[0], $ARGV[1]))
{
print "Failed to detect connection information.\n";
exit;
}
#
# The flags parameter is optional. SMFI_CURR_ACTS sets all of the
# current version's filtering capabilities.
#
# %Sendmail::Milter::DEFAULT_CALLBACKS is provided for you in getting
# up to speed quickly. I highly recommend creating a callback table
# of your own with only the callbacks that you need.
#
if (not Sendmail::Milter::register($ARGV[0], \%my_callbacks,
SMFI_CURR_ACTS))
{
print "Failed to register callbacks for $ARGV[0].\n";
exit;
}
print "Starting Sendmail::Milter $Sendmail::Milter::VERSION engine.\n";
if (Sendmail::Milter::main())
{
print "Successful exit from the Sendmail::Milter engine.\n";
}
else
{
print "Unsuccessful exit from the Sendmail::Milter engine.\n";
}
}
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