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/*
* ayiya.c
*
* Copyright (C) 2011-22 - 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/>.
*
*/
/*
http://en.wikipedia.org/wiki/Anything_In_Anything
http://tools.ietf.org/html/rfc4891
*/
#include "ndpi_protocol_ids.h"
#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_AYIYA
#include "ndpi_api.h"
struct ayiya {
u_int8_t flags[3];
u_int8_t next_header;
u_int32_t epoch;
u_int8_t identity[16];
u_int8_t signature[20];
};
void ndpi_search_ayiya(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &ndpi_struct->packet;
NDPI_LOG_DBG(ndpi_struct, "search AYIYA\n");
if(packet->udp && (flow->detected_protocol_stack[0] == NDPI_PROTOCOL_UNKNOWN)) {
/* Ayiya is udp based, port 5072 */
u_int16_t port_to_match = htons(5072);
if ((packet->udp->source == port_to_match || packet->udp->dest == port_to_match)
/* check for ayiya new packet */
&& (packet->payload_packet_len > 44)
) {
/* FINISH */
struct ayiya *a = (struct ayiya*)packet->payload;
u_int32_t epoch = ntohl(a->epoch), now;
u_int32_t fiveyears = 86400 * 365 * 5;
now = packet->current_time_ms;
if((epoch >= (now - fiveyears)) && (epoch <= (now+86400 /* 1 day */))) {
NDPI_LOG_INFO(ndpi_struct, "found AYIYA\n");
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_AYIYA, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
}
return;
}
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
}
void init_ayiya_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask)
{
ndpi_set_bitmask_protocol_detection("Ayiya", ndpi_struct, detection_bitmask, *id,
NDPI_PROTOCOL_AYIYA,
ndpi_search_ayiya,
NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_UDP_WITH_PAYLOAD,
SAVE_DETECTION_BITMASK_AS_UNKNOWN,
ADD_TO_DETECTION_BITMASK);
*id += 1;
}
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