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
69
70
71
72
73
|
/*
* ultrasurf.c
*
* Copyright (C) 2022-23 - ntop.org
*
* 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_ULTRASURF
#include "ndpi_api.h"
#include "ndpi_private.h"
static void ndpi_int_ultrasurf_add_connection(struct ndpi_detection_module_struct * const ndpi_struct,
struct ndpi_flow_struct * const flow)
{
NDPI_LOG_INFO(ndpi_struct, "found UltraSurf\n");
ndpi_set_detected_protocol(ndpi_struct, flow,
NDPI_PROTOCOL_ULTRASURF,
NDPI_PROTOCOL_UNKNOWN,
NDPI_CONFIDENCE_DPI);
}
static void ndpi_search_ultrasurf(struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct const * const packet = &ndpi_struct->packet;
NDPI_LOG_DBG(ndpi_struct, "search UltraSurf\n");
if (packet->payload_packet_len < 8)
{
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
return;
}
if (htonl(get_u_int32_t(packet->payload, 0)) == 0xcc1c3041 &&
htonl(get_u_int32_t(packet->payload, 4)) == 0x5ba43866)
{
ndpi_int_ultrasurf_add_connection(ndpi_struct, flow);
}
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
void init_ultrasurf_dissector(struct ndpi_detection_module_struct *ndpi_struct,
u_int32_t *id)
{
ndpi_set_bitmask_protocol_detection("UltraSurf", ndpi_struct, *id,
NDPI_PROTOCOL_ULTRASURF,
ndpi_search_ultrasurf,
NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
SAVE_DETECTION_BITMASK_AS_UNKNOWN,
ADD_TO_DETECTION_BITMASK
);
*id += 1;
}
|