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/*
* sflow.c
*
* Copyright (C) 2011-15 - ntop.org
*
* nDPI is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* nDPI is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with nDPI. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "ndpi_api.h"
#ifdef NDPI_PROTOCOL_SFLOW
static void ndpi_check_sflow(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &flow->packet;
// const u_int8_t *packet_payload = packet->payload;
u_int32_t payload_len = packet->payload_packet_len;
if((packet->udp != NULL)
&& (payload_len >= 24)
/* Version */
&& (packet->payload[0] == 0) && (packet->payload[1] == 0) && (packet->payload[2] == 0)
&& ((packet->payload[3] == 2) || (packet->payload[3] == 5))) {
NDPI_LOG(NDPI_PROTOCOL_SFLOW, ndpi_struct, NDPI_LOG_DEBUG, "Found sflow.\n");
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_SFLOW, NDPI_PROTOCOL_UNKNOWN);
return;
}
}
void ndpi_search_sflow(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
NDPI_LOG(NDPI_PROTOCOL_SFLOW, ndpi_struct, NDPI_LOG_DEBUG, "sflow detection...\n");
ndpi_check_sflow(ndpi_struct, flow);
}
#endif
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