Hello All!
I am trying to figure out how my_test_handler works.
When a Net-Snmp with oid {1,2,3,4} , my_test_handler is called .
The oid which appears inside my_test_handler is not the one which this
fuction is registered on .
Why is that ?
What is the use of the OID inside that function ?
Why do we have to compare it to the original oid before setting the call
to snmp_set_var_typed_value(var, ASN_INTEGER,
(u_char *) & accesses,
sizeof(accesses));
?
Thanks
Dan Porat
.
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.
.
.
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static oid my_test_oid[4] = { 1, 2, 3, 4 };
.
.
.
.
netsnmp_register_handler(netsnmp_create_handler_registration
("myTest", my_test_handler, my_test_oid, 4,
HANDLER_CAN_RONLY));
.
.
.
.
.
int
my_test_handler(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
oid myoid1[] = { 1, 2, 3, 4, 5, 6 };
static u_long accesses = 0;
DEBUGMSGTL(("testhandler", "Got request:\n"));
/*
* loop through requests
*/
while (requests) {
netsnmp_variable_list *var = requests->requestvb;
DEBUGMSGTL(("testhandler", " oid:"));
DEBUGMSGOID(("testhandler", var->name, var->name_length));
DEBUGMSG(("testhandler", "\n"));
switch (reqinfo->mode) {
case MODE_GET:
if (netsnmp_oid_equals(var->name, var->name_length, myoid1,
6)
== 0) {
snmp_set_var_typed_value(var, ASN_INTEGER,
(u_char *) & accesses,
sizeof(accesses));
return SNMP_ERR_NOERROR;
}
break;
case MODE_GETNEXT:
if (snmp_oid_compare(var->name, var->name_length, myoid1, 6)
< 0) {
snmp_set_var_objid(var, myoid1, 6);
snmp_set_var_typed_value(var, ASN_INTEGER,
(u_char *) & accesses,
sizeof(accesses));
return SNMP_ERR_NOERROR;
}
break;
default:
netsnmp_set_request_error(reqinfo, requests,
SNMP_ERR_GENERR);
break;
}
requests = requests->next;
}
return SNMP_ERR_NOERROR;
}
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