my $trap_session = SNMPv1_Session->open_trap_session ()
  or die "cannot open trap session";
my ($trap, $sender_addr, $sender_port) = $trap_session->receive_trap ()
  or die "cannot receive trap";
my ($community, $enterprise, $agent,
    $generic, $specific, $sysUptime, $bindings)
  = $session->decode_trap_request ($trap)
    or die "cannot decode trap received"
...
my ($binding, $oid, $value);
while ($bindings ne '') {
    ($binding,$bindings) = &decode_sequence ($bindings);
    ($oid, $value) = decode_by_template ($binding, "%O%@");
    print BER::pretty_oid ($oid)," => ",pretty_print ($value),"\n";
}