1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
|
/*
* avast_securedns.c
*
* Copyright (C) 2012-22 - ntop.org
*
* This module 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.
*
* This module 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.
* If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "ndpi_protocol_ids.h"
#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_AVAST_SECUREDNS
#include <stdlib.h>
#include "ndpi_api.h"
#include "ndpi_private.h"
static void ndpi_int_avast_securedns_add_connection(struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow)
{
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_AVAST_SECUREDNS, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
}
static void ndpi_search_avast_securedns(struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct * packet = &ndpi_struct->packet;
if (packet->payload_packet_len < 34 ||
ntohl(get_u_int32_t(packet->payload, 11)) != 0x00013209 ||
flow->packet_counter > 1)
{
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
return;
}
if (strncasecmp((char *)&packet->payload[15], "securedns", NDPI_STATICSTRING_LEN("securedns")) == 0)
{
ndpi_int_avast_securedns_add_connection(ndpi_struct, flow);
return;
}
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
void init_avast_securedns_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id)
{
ndpi_set_bitmask_protocol_detection("AVAST SecureDNS",
ndpi_struct, *id,
NDPI_PROTOCOL_AVAST_SECUREDNS,
ndpi_search_avast_securedns,
NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_UDP_WITH_PAYLOAD,
SAVE_DETECTION_BITMASK_AS_UNKNOWN,
ADD_TO_DETECTION_BITMASK);
*id += 1;
}
|