the sender code looks like this (just copied from Essential SNMP Book): 
use SNMP_util "0.54";  # This will load the BER and SNMP_Session for u
+s
snmptrap("public\@172.20.50.13:162", ".1.3.6.1.4.1.2789", "sunserver1"
+, 6, 1247,".1.3.6.1.4.1.2789.1247.1", "int", "2448816");

[download]
the reciever code I got from Mr. Leinen's site: 
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";
}

[download]
Mr. Leinen has already replied to my inquiry. he pointed out the errors in those codes, though I'm not sure what the second argument is for the decode_by_template:
Now to the three errors in "recivtrap.pl":
* You test for defined($trap) before decoding the trap. This is good. But shouldn't the decoding of the bindings in the trap be within the scope of the "if" as well?
* Check for consistent use of $trap_session (vs. $session)
* decode_by_template takes at least two arguments.
The first two errors would have generated warnings or errors with
"perl -w" and "use strict;". The third one unfortunately not, because I failed to declare the argument list in the prototype definition for "decode_by_template" in BER.pm. I will add that to the next release of BER.pm.3

In reply to Re^2: Question about Decoding Traps using SNMP_Session.pm by jamjam
in thread Question about Decoding Traps using SNMP_Session.pm by jamjam

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