uint8_t PfRingDevice::getTotalNumOfRxChannels()
{
if (m_NumOfOpenedRxChannels > 0)
{
uint8_t res = pfring_get_num_rx_channels(m_PfRingDescriptors[0]);
return res;
}
else
{
uint32_t flags = PF_RING_PROMISC | PF_RING_REENTRANT | PF_RING_HW_TIMESTAMP | PF_RING_DNA_SYMMETRIC_RSS;
pfring* ring = pfring_open(m_DeviceName, DEFAULT_PF_RING_SNAPLEN, flags);
uint8_t res = pfring_get_num_rx_channels(ring);
pfring_close(ring);
return res;
}
}
u_int8_t pfring_open_multichannel(const char *device_name, u_int32_t caplen,
u_int32_t flags,
pfring *ring[MAX_NUM_RX_CHANNELS]) {
u_int8_t num_channels, i, num = 0;
char *at;
char base_device_name[32];
snprintf(base_device_name, sizeof(base_device_name), "%s", device_name);
at = strchr(base_device_name, '@');
if(at != NULL)
at[0] = '\0';
/* Count how many RX channel the specified device supports */
ring[0] = pfring_open(base_device_name, caplen, flags);
if(ring[0] == NULL)
return(0);
else
num_channels = pfring_get_num_rx_channels(ring[0]);
pfring_close(ring[0]);
if(num_channels > MAX_NUM_RX_CHANNELS)
num_channels = MAX_NUM_RX_CHANNELS;
/* Now do the real job */
for(i=0; i<num_channels; i++) {
char dev[32];
snprintf(dev, sizeof(dev), "%s@%d", base_device_name, i);
ring[i] = pfring_open(dev, caplen, flags);
if(ring[i] == NULL)
return(num);
else
num++;
}
return(num);
}