mirror of
https://github.com/vel21ripn/nDPI.git
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57 lines
2 KiB
C
57 lines
2 KiB
C
/*
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* bgp.c
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*
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* Copyright (C) 2009-2011 by ipoque GmbH
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* Copyright (C) 2011-15 - ntop.org
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*
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* This file is part of nDPI, an open source deep packet inspection
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* library based on the OpenDPI and PACE technology by ipoque GmbH
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*
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* nDPI is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* nDPI is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with nDPI. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "ndpi_protocols.h"
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#ifdef NDPI_PROTOCOL_BGP
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static void ndpi_int_bgp_add_connection(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
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{
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ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_BGP, NDPI_REAL_PROTOCOL);
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}
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/* this detection also works asymmetrically */
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void ndpi_search_bgp(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
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{
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struct ndpi_packet_struct *packet = &flow->packet;
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// struct ndpi_id_struct *src=ndpi_struct->src;
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// struct ndpi_id_struct *dst=ndpi_struct->dst;
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if (packet->payload_packet_len > 18 &&
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get_u_int64_t(packet->payload, 0) == 0xffffffffffffffffULL &&
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get_u_int64_t(packet->payload, 8) == 0xffffffffffffffffULL &&
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ntohs(get_u_int16_t(packet->payload, 16)) <= packet->payload_packet_len &&
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(packet->tcp->dest == htons(179) || packet->tcp->source == htons(179))
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&& packet->payload[18] < 5) {
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NDPI_LOG(NDPI_PROTOCOL_BGP, ndpi_struct, NDPI_LOG_DEBUG, "BGP detected.\n");
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ndpi_int_bgp_add_connection(ndpi_struct, flow);
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return;
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}
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NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_BGP);
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}
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#endif
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