net-snmp-users@lists.sourceforge.net

Hello.
I want to send traps from an application to the manager through the
snmpd demon.

--------------
- APPL -
-localhost-
---------------
-
-
-
-
v
------------------ ---------------------
- SNMPD - - MANAGER -
- localhost - -------------> - other host -
------------------ ---------------------




For this, I modificated the example notification.c. In this case, you
send traps each 30 seconds.
When I load the module, it`s worked. The SNMPD daemon send the traps and
these are received in the host manager. My problem is that I want to
send traps within a program with a main() because I dont want to
recompile everytime or load the module, but It isnt work.
My program is shown below:


I compile doing: gcc -g -I. `net-snmp-config --cflags` -fPIC -shared
-c -o example.o example.c
gcc -g -o example example.o `net-snmp-config
--agent-libs`

What is the error???
Have this form sense???


The question is: How an application can send SNMP TRAP to Managers using
the SNMPD daemon?




/*
* start be including the appropriate header files
*/
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>

int main(int argc, char *argv[])
{

/*
* define the OID for the notification we're going to send
* NET-SNMP-EXAMPLES-MIB::netSnmpExampleHeartbeatNotification
*/
oid notification_oid[] =
{ 1, 3, 6, 1, 4, 1, 8072, 2, 3, 0, 1 };
size_t notification_oid_len = OID_LENGTH(notification_oid);
static u_long count = 0;

/*
* In the notification, we have to assign our notification OID to
* the snmpTrapOID.0 object. Here is it's definition.
*/
oid objid_snmptrap[] = { 1, 3, 6, 1, 6, 3, 1, 1, 4, 1, 0 };
size_t objid_snmptrap_len = OID_LENGTH(objid_snmptrap);

/*
* define the OIDs for the varbinds we're going to include
* with the notification -
* NET-SNMP-EXAMPLES-MIB::netSnmpExampleHeartbeatRate and
* NET-SNMP-EXAMPLES-MIB::netSnmpExampleHeartbeatName
*/
oid hbeat_rate_oid[] = { 1, 3, 6, 1, 4, 1, 8072, 2, 3, 2, 1, 0 };
size_t hbeat_rate_oid_len = OID_LENGTH(hbeat_rate_oid);
oid hbeat_name_oid[] = { 1, 3, 6, 1, 4, 1, 8072, 2, 3, 2, 2, 0 };
size_t hbeat_name_oid_len = OID_LENGTH(hbeat_name_oid);

/*
* here is where we store the variables to be sent in the trap
*/
netsnmp_variable_list *notification_vars = NULL;
const char *heartbeat_name = "A girl named Maria";



/*
* add in the trap definition object
*/
snmp_varlist_add_variable(&notification_vars,
/*
* the snmpTrapOID.0 variable
*/
objid_snmptrap, objid_snmptrap_len,
/*
* value type is an OID
*/
ASN_OBJECT_ID,
/*
* value contents is our notification OID
*/
(u_char *) notification_oid,
/*
* size in bytes = oid length * sizeof(oid)
*/
notification_oid_len * sizeof(oid));


/*
* add in the additional objects defined as part of the trap
*/

/*snmp_varlist_add_variable(&notification_vars,
hbeat_rate_oid, hbeat_rate_oid_len,
ASN_INTEGER,
(u_char *)&heartbeat_rate,
sizeof(heartbeat_rate));*/

/*
* send the trap out. This will send it to all registered
* receivers (see the "SETTING UP TRAP AND/OR INFORM DESTINATIONS"
* section of the snmpd.conf manual page.
*/
send_v2trap(notification_vars);

/*
* free the created notification variable list
*/
snmp_free_varbind(notification_vars);
}


Thanks a lots.

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