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/*
* ubntac2.c
*
* Copyright (C) 2015 Thomas Fjellstrom
*
* 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_protocol_ids.h"
#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_UBNTAC2
#include "ndpi_api.h"
#include "ndpi_private.h"
static void ndpi_int_ubntac2_add_connection(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_UBNTAC2, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
}
static void ndpi_search_ubntac2(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &ndpi_struct->packet;
u_int8_t tlv_type;
u_int16_t tlv_length, version_len;
int off;
NDPI_LOG_DBG(ndpi_struct, "search ubntac2\n");
if(packet->payload_packet_len >= 4 &&
(packet->udp->source == htons(10001) || packet->udp->dest == htons(10001)) &&
packet->payload[0] == 0x02 &&
packet->payload[1] == 0x06 &&
(4 + ntohs(*(u_int16_t *)&packet->payload[2]) == packet->payload_packet_len)) {
NDPI_LOG_INFO(ndpi_struct, "UBNT AirControl 2 request\n");
ndpi_int_ubntac2_add_connection(ndpi_struct, flow);
/* Parse TLV list: 1 byte type + 2 byte length + (optional) data */
off = 4;
while (off + 3 < packet->payload_packet_len) {
tlv_type = packet->payload[off];
tlv_length = ntohs(*(u_int16_t *)&packet->payload[off + 1]);
NDPI_LOG_DBG2(ndpi_struct, "0x%x Len %d\n", tlv_type, tlv_length);
if(tlv_type == 0x03 && off + 3 + tlv_length < packet->payload_packet_len) {
version_len = ndpi_min(sizeof(flow->protos.ubntac2.version) - 1, tlv_length);
memcpy(flow->protos.ubntac2.version, (const char *)&packet->payload[off + 3], version_len);
flow->protos.ubntac2.version[version_len] = '\0';
}
off += 3 + tlv_length;
}
return;
}
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
void init_ubntac2_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id)
{
ndpi_set_bitmask_protocol_detection("UBNTAC2", ndpi_struct, *id,
NDPI_PROTOCOL_UBNTAC2,
ndpi_search_ubntac2,
NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_UDP_WITH_PAYLOAD,
SAVE_DETECTION_BITMASK_AS_UNKNOWN,
ADD_TO_DETECTION_BITMASK);
*id += 1;
}
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