static SFLSampler *getSampler(HSP *sp, char *devName, uint32_t ifIndex)
{
SFLSampler *sampler = sfl_agent_getSamplerByIfIndex(sp->sFlow->agent, ifIndex);
if(sampler == NULL) {
SFLDataSource_instance dsi;
SFL_DS_SET(dsi, 0, ifIndex, 0); // ds_class,ds_index,ds_instance
HSPSFlow *sf = sp->sFlow;
// add sampler (with sub-sampling rate), and poller too
uint32_t samplingRate = sf->sFlowSettings->ulogSubSamplingRate;
sampler = sfl_agent_addSampler(sf->agent, &dsi);
sfl_sampler_set_sFlowFsPacketSamplingRate(sampler, samplingRate);
sfl_sampler_set_sFlowFsReceiver(sampler, HSP_SFLOW_RECEIVER_INDEX);
if(devName) {
uint32_t pollingInterval = sf->sFlowSettings ?
sf->sFlowSettings->pollingInterval :
SFL_DEFAULT_POLLING_INTERVAL;
SFLPoller *poller = sfl_agent_addPoller(sf->agent, &dsi, sp, agentCB_getCounters_interface);
sfl_poller_set_sFlowCpInterval(poller, pollingInterval);
sfl_poller_set_sFlowCpReceiver(poller, HSP_SFLOW_RECEIVER_INDEX);
// remember the device name to make the lookups easier later.
// Don't want to point directly to the SFLAdaptor or SFLAdaptorNIO object
// in case it gets freed at some point. The device name is enough.
poller->userData = (void *)my_strdup(devName);
}
}
return sampler;
}
SFLSampler *sfl_agent_addSampler(SFLAgent *agent, SFLDataSource_instance *pdsi)
{
/* Keep the list sorted. */
SFLSampler *prev = NULL, *sm = agent->samplers;
for(; sm != NULL; prev = sm, sm = sm->nxt) {
int64_t cmp = sfl_dsi_compare(pdsi, &sm->dsi);
if(cmp == 0) return sm; /* found - return existing one */
if(cmp < 0) break; /* insert here */
}
/* either we found the insert point, or reached the end of the list...*/
{
SFLSampler *newsm = (SFLSampler *)sflAlloc(agent, sizeof(SFLSampler));
sfl_sampler_init(newsm, agent, pdsi);
if(prev) prev->nxt = newsm;
else agent->samplers = newsm;
newsm->nxt = sm;
/* see if we should go in the ifIndex jumpTable */
if(SFL_DS_CLASS(newsm->dsi) == 0) {
SFLSampler *test = sfl_agent_getSamplerByIfIndex(agent, SFL_DS_INDEX(newsm->dsi));
if(test && (SFL_DS_INSTANCE(newsm->dsi) < SFL_DS_INSTANCE(test->dsi))) {
/* replace with this new one because it has a lower ds_instance number */
sfl_agent_jumpTableRemove(agent, test);
test = NULL;
}
if(test == NULL) sfl_agent_jumpTableAdd(agent, newsm);
}
return newsm;
}
}
/**
* Searches for existing sampler with ifIndex and returns it. If there is no
* existing sampler with the ifIndex, creates a new one (and a poller) and
* returns it.
*/
static SFLSampler *getSampler(HSP *sp, char *devName, uint32_t ifIndex)
{
SFLSampler *sampler = sfl_agent_getSamplerByIfIndex(sp->sFlow->agent, ifIndex);
if (sampler == NULL) {
SFLDataSource_instance dsi;
SFL_DS_SET(dsi, 0, ifIndex, 0); // ds_class=0 interface
HSPSFlow *sf = sp->sFlow;
uint32_t samplingRate = sp->sFlow->sFlowSettings->samplingRate;
sampler = sfl_agent_addSampler(sf->agent, &dsi);
sampler->userData = (void *)my_strdup(devName);
sfl_sampler_set_sFlowFsPacketSamplingRate(sampler, samplingRate);
sfl_sampler_set_sFlowFsReceiver(sampler, HSP_SFLOW_RECEIVER_INDEX);
}
return sampler;
}
