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
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
/*
* discord.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_DISCORD
#include "ndpi_api.h"
#include "ndpi_private.h"
static void ndpi_int_discord_add_connection(struct ndpi_detection_module_struct * const ndpi_struct,
struct ndpi_flow_struct * const flow)
{
NDPI_LOG_INFO(ndpi_struct, "found discord\n");
ndpi_set_detected_protocol(ndpi_struct, flow,
NDPI_PROTOCOL_DISCORD,
NDPI_PROTOCOL_UNKNOWN,
NDPI_CONFIDENCE_DPI);
}
static void ndpi_search_discord(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 discord\n");
if (packet->payload_packet_len == 8 &&
ntohl(get_u_int32_t(packet->payload, 0)) == 0x1337cafe)
{
ndpi_int_discord_add_connection(ndpi_struct, flow);
return;
}
if (packet->payload_packet_len == 74)
{
if (flow->packet_counter == 1 &&
ntohl(get_u_int32_t(packet->payload, 0)) == 0x00010046)
{
/* Wait for the next packet, hopefully beeing able to dissect the client IP. */
return;
}
if (flow->packet_counter == 2 &&
ntohl(get_u_int32_t(packet->payload, 0)) == 0x00020046)
{
/* Dissect client IP. */
size_t len = sizeof(flow->protos.discord.client_ip) - 1;
strncpy(flow->protos.discord.client_ip, (char const *)&packet->payload[8], len);
flow->protos.discord.client_ip[len] = '\0';
ndpi_int_discord_add_connection(ndpi_struct, flow);
return;
}
}
if (flow->packet_counter >= 5)
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
void init_discord_dissector(struct ndpi_detection_module_struct *ndpi_struct,
u_int32_t *id)
{
ndpi_set_bitmask_protocol_detection("Discord", ndpi_struct, *id,
NDPI_PROTOCOL_DISCORD,
ndpi_search_discord,
NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_UDP_WITH_PAYLOAD,
SAVE_DETECTION_BITMASK_AS_UNKNOWN,
ADD_TO_DETECTION_BITMASK
);
*id += 1;
}
|