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/*
* bgp.c
*
* Copyright (C) 2009-2011 by ipoque GmbH
* Copyright (C) 2011-15 - ntop.org
*
* This file is part of nDPI, an open source deep packet inspection
* library based on the OpenDPI and PACE technology by ipoque GmbH
*
* 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_protocols.h"
#ifdef NDPI_PROTOCOL_BGP
static void ndpi_int_bgp_add_connection(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_BGP/* , NDPI_REAL_PROTOCOL */);
}
/* this detection also works asymmetrically */
void ndpi_search_bgp(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &flow->packet;
// struct ndpi_id_struct *src=ndpi_struct->src;
// struct ndpi_id_struct *dst=ndpi_struct->dst;
if (packet->payload_packet_len > 18 &&
get_u_int64_t(packet->payload, 0) == 0xffffffffffffffffULL &&
get_u_int64_t(packet->payload, 8) == 0xffffffffffffffffULL &&
ntohs(get_u_int16_t(packet->payload, 16)) <= packet->payload_packet_len &&
(packet->tcp->dest == htons(179) || packet->tcp->source == htons(179))
&& packet->payload[18] < 5) {
NDPI_LOG(NDPI_PROTOCOL_BGP, ndpi_struct, NDPI_LOG_DEBUG, "BGP detected.\n");
ndpi_int_bgp_add_connection(ndpi_struct, flow);
return;
}
NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_BGP);
}
#endif
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