[email protected]

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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