/*! \fn char *snmp_get_multi(host_t *current_host, snmp_oids_t *snmp_oids, int num_oids)
* \brief performs multiple OID snmp_get's in a single network call
*
* This function will a group of snmp OID's for a host. The host snmp
* session must already be established. The function will modify elements of
* the snmp_oids array with the results from the snmp api call.
*
*/
void snmp_get_multi(host_t *current_host, snmp_oids_t *snmp_oids, int num_oids) {
struct snmp_pdu *pdu = NULL;
struct snmp_pdu *response = NULL;
struct variable_list *vars = NULL;
int status;
int i;
int max_repetitions = 1;
int non_repeaters = 0;
int array_count;
int index_count;
/* get rid of some compiler warnings */
errstat = 0;
errindex = 0;
struct nameStruct {
oid name[MAX_OID_LEN];
size_t name_len;
} *name, *namep;
/* load up oids */
namep = name = (struct nameStruct *) calloc(num_oids, sizeof(*name));
pdu = snmp_pdu_create(SNMP_MSG_GET);
for (i = 0; i < num_oids; i++) {
namep->name_len = MAX_OID_LEN;
if (!snmp_parse_oid(snmp_oids[i].oid, namep->name, &namep->name_len)) {
SPINE_LOG(("Host[%i] ERROR: Problems parsing Multi SNMP OID! (oid: %s)\n", current_host->id, snmp_oids[i].oid));
/* Mark this OID as "bad" */
SET_UNDEFINED(snmp_oids[i].result);
}else{
snmp_add_null_var(pdu, namep->name, namep->name_len);
}
namep++;
}
status = STAT_DESCRIP_ERROR;
/* execute the multi-get request */
retry:
status = snmp_sess_synch_response(current_host->snmp_session, pdu, &response);
/* liftoff, successful poll, process it!! */
if (status == STAT_SUCCESS) {
if (response == NULL) {
SPINE_LOG(("ERROR: An internal Net-Snmp error condition detected in Cacti snmp_get_multi\n"));
status = STAT_ERROR;
}else{
if (response->errstat == SNMP_ERR_NOERROR) {
vars = response->variables;
for(i = 0; i < num_oids && vars; i++) {
if (!IS_UNDEFINED(snmp_oids[i].result)) {
#ifdef USE_NET_SNMP
snmp_snprint_value(snmp_oids[i].result, RESULTS_BUFFER, vars->name, vars->name_length, vars);
#else
sprint_value(snmp_oids[i].result, vars->name, vars->name_length, vars);
#endif
vars = vars->next_variable;
}
}
}else{
if (response->errindex != 0) {
index_count = 1;
array_count = 0;
/* Find our index against errindex */
while (array_count < num_oids) {
if (IS_UNDEFINED(snmp_oids[array_count].result) ) {
array_count++;
}else{
/* if we have found our error, exit */
if (index_count == response->errindex) {
SET_UNDEFINED(snmp_oids[array_count].result);
break;
}
array_count++;
index_count++;
}
}
/* remote the invalid OID from the PDU */
pdu = snmp_fix_pdu(response, SNMP_MSG_GET);
/* free the previous response */
snmp_free_pdu(response);
response = NULL;
if (pdu != NULL) {
/* retry the request */
goto retry;
}else{
/* all OID's errored out so exit cleanly */
status = STAT_SUCCESS;
}
}else{
status = STAT_DESCRIP_ERROR;
}
}
}
}
if (status != STAT_SUCCESS) {
current_host->ignore_host = 1;
for (i = 0; i < num_oids; i++) {
SET_UNDEFINED(snmp_oids[i].result);
}
}
if (response != NULL) {
snmp_free_pdu(response);
}
}
/*! \fn char *snmp_get_multi(host_t *current_host, snmp_oids_t *snmp_oids, int num_oids)
* \brief performs multiple OID snmp_get's in a single network call
*
* This function will a group of snmp OID's for a host. The host snmp
* session must already be established. The function will modify elements of
* the snmp_oids array with the results from the snmp api call.
*
*/
void snmp_get_multi(host_t *current_host, snmp_oids_t *snmp_oids, int num_oids) {
struct snmp_pdu *pdu = NULL;
struct snmp_pdu *response = NULL;
struct variable_list *vars = NULL;
int status;
int i;
int max_repetitions = 1;
int non_repeaters = 0;
struct nameStruct {
oid name[MAX_OID_LEN];
size_t name_len;
} *name, *namep;
/* load up oids */
namep = name = (struct nameStruct *) calloc(num_oids, sizeof(*name));
pdu = snmp_pdu_create(SNMP_MSG_GET);
for (i = 0; i < num_oids; i++) {
namep->name_len = MAX_OID_LEN;
if (!snmp_parse_oid(snmp_oids[i].oid, namep->name, &namep->name_len)) {
CACTID_LOG(("Host[%i] ERROR: Problems parsing Multi SNMP OID! (oid: %s)\n", current_host->id, snmp_oids[i].oid));
/* Mark this OID as "bad" */
SET_UNDEFINED(snmp_oids[i].result);
}else{
snmp_add_null_var(pdu, namep->name, namep->name_len);
}
namep++;
}
status = STAT_DESCRIP_ERROR;
/* execute the multi-get request */
retry:
status = snmp_sess_synch_response(current_host->snmp_session, pdu, &response);
/* liftoff, successful poll, process it!! */
if (status == STAT_SUCCESS) {
if (response == NULL) {
CACTID_LOG(("ERROR: An internal Net-Snmp error condition detected in Cacti snmp_get_multi\n"));
status = STAT_ERROR;
}else{
if (response->errstat == SNMP_ERR_NOERROR) {
vars = response->variables;
for(i = 0; i < num_oids && vars; i++) {
if (!IS_UNDEFINED(snmp_oids[i].result)) {
#ifdef USE_NET_SNMP
snmp_snprint_value(snmp_oids[i].result, sizeof(snmp_oids[i].result), vars->name, vars->name_length, vars);
#else
sprint_value(snmp_oids[i].result, vars->name, vars->name_length, vars);
#endif
vars = vars->next_variable;
}
}
}else{
if (response->errindex != 0) {
/* removed errored OID and then retry */
int count;
/* Find our index against errindex */
count = 0;
for(i = 0; i < num_oids && count < response->errindex; i++) {
if ( ! IS_UNDEFINED(snmp_oids[i].result) ) {
count++;
}
}
i--;
SET_UNDEFINED(snmp_oids[i].result);
for (count = 1, vars = response->variables;
vars && count != response->errindex;
vars = vars->next_variable, count++) {
}
pdu = snmp_fix_pdu(response, SNMP_MSG_GET);
snmp_free_pdu(response);
response = NULL;
if (pdu != NULL) {
goto retry;
}else{
status = STAT_DESCRIP_ERROR;
}
}else{
status = STAT_DESCRIP_ERROR;
}
}
}
}
if (status != STAT_SUCCESS) {
current_host->ignore_host = 1;
for (i = 0; i < num_oids; i++) {
SET_UNDEFINED(snmp_oids[i].result);
}
}
if (response != NULL) {
snmp_free_pdu(response);
}
}
