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;
}
/**
* 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;
}
static SFLSampler *getSampler(HSP *sp, SFLAdaptor *adaptor)
{
HSPAdaptorNIO *adaptorNIO=(HSPAdaptorNIO *)adaptor->userData;
if(adaptorNIO) {
if(adaptorNIO->sampler == NULL) {
SFLDataSource_instance dsi;
SFL_DS_SET(dsi, 0, adaptor->ifIndex, 0); // ds_class,ds_index,ds_instance
HSPSFlow *sf = sp->sFlow;
// add sampler (with sub-sampling rate)
uint32_t samplingRate = sf->sFlowSettings->ulogSubSamplingRate;
adaptorNIO->sampler = sfl_agent_addSampler(sf->agent, &dsi);
sfl_sampler_set_sFlowFsPacketSamplingRate(adaptorNIO->sampler, samplingRate);
sfl_sampler_set_sFlowFsReceiver(adaptorNIO->sampler, HSP_SFLOW_RECEIVER_INDEX);
// and make sure we have a poller too
getPoller(sp, adaptor);
}
return adaptorNIO->sampler;
}
return NULL;
}
void sfl_sampler_init(SFLSampler *sampler, SFLAgent *agent, SFLDataSource_instance *pdsi)
{
/* copy the dsi in case it points to sampler->dsi, which we are about to clear.
(Thanks to Jagjit Choudray of Force 10 Networks for pointing out this bug) */
SFLDataSource_instance dsi = *pdsi;
/* preserve the *nxt pointer too, in case we are resetting this poller and it is
already part of the agent's linked list (thanks to Matt Woodly for pointing this out) */
SFLSampler *nxtPtr = sampler->nxt;
/* clear everything */
memset(sampler, 0, sizeof(*sampler));
/* restore the linked list ptr */
sampler->nxt = nxtPtr;
/* now copy in the parameters */
sampler->agent = agent;
sampler->dsi = dsi;
/* set defaults */
sfl_sampler_set_sFlowFsMaximumHeaderSize(sampler, SFL_DEFAULT_HEADER_SIZE);
sfl_sampler_set_sFlowFsPacketSamplingRate(sampler, SFL_DEFAULT_SAMPLING_RATE);
}
