I'm trying to manipulate ifLinkUpDownTrapEnable values. I used mib2c to create a
ifXTable module and I can get and set values with snmpget and snmpset just fine. Now
I'm trying to write a utility routine to update all the values with one call. I've
got something like:
// IF-MIB::ifLinkUpDownTrapEnable (.1.3.6.1.2.1.31.1.1.1.14).
// 0 replaced by port number below.
static oid link_OID[] = { SNMP_OID_MIB2, 31, 1, 1, 1, 14, 0 };
static size_t link_OID_len = OID_LENGTH(link_OID);
int SXSNMPSetTrapsEnabled(int auth, int links[])
{
struct snmp_pdu *pdu;
struct snmp_pdu *response;
size_t port;
char value[20];
int status;
int retval;
/*
* Create the PDU for the data for our request.
*/
pdu = snmp_pdu_create(SNMP_MSG_SET);
sprintf(value, "%d", auth);
snmp_add_var(pdu, auth_OID, auth_OID_len, 'i', value);
for (port = 0; port < NUM_IF; ++port) {
link_OID[link_OID_len-1] = port+1;
sprintf(value, "%d", links[port]);
snmp_add_var(pdu, link_OID, link_OID_len, 'i', value);
}
/*
* Send the Request out.
*/
status = snmp_synch_response(ss, pdu, &response);
if (status == STAT_SUCCESS) {
retval = SXSNMP_SUCCESS;
} else {
snmp_log(LOG_ERR, "Unable to set trap enable values\n");
retval = SXSNMP_FAILURE;
}
if (response)
snmp_free_pdu(response);
return retval;
}
and I've added tracing to my set_ifLinkUpDownTrapEnable function. When I use snmpset
to set individual objects, I get things like:
set_ifLinkUpDownTrapEnable: port 8, value 1
set_ifLinkUpDownTrapEnable: port 1, value 1
set_ifLinkUpDownTrapEnable: port 3, value 1
but when I call the function above, the value column is correct but the port is 1 for
all the invocations.
I drilled down through snmp_add_var() and it copies the OID so I don't see a problem
with using the same OID variable over and over, changing just the last element. And
I've printed out the OID in the loop that calls snmp_add_var() and I get the correct
values there.
Any pointers or insights appreciated. Thanks!
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