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
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
/*
* warcraft3.c
*
* Copyright (C) 2009-11 - ipoque GmbH
* 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/>.
*
*/
#include "ndpi_protocol_ids.h"
#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_WARCRAFT3
#include "ndpi_api.h"
#include "ndpi_private.h"
static void ndpi_int_warcraft3_add_connection(struct ndpi_detection_module_struct
*ndpi_struct, struct ndpi_flow_struct *flow)
{
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_WARCRAFT3, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
}
static void ndpi_search_warcraft3(struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &ndpi_struct->packet;
u_int16_t l; /*
Leave it as u_int32_t because otherwise 'u_int16_t temp'
might overflood it and thus generate an infinite loop
*/
NDPI_LOG_DBG(ndpi_struct, "search WARCRAFT3\n");
if (flow->packet_counter == 1 && packet->payload_packet_len == 1 && packet->payload[0] == 0x01) {
NDPI_LOG_DBG2(ndpi_struct, "maybe warcraft3: packet_len == 1\n");
return;
} else if (packet->payload_packet_len >= 4 && (packet->payload[0] == 0xf7 || packet->payload[0] == 0xff)) {
NDPI_LOG_DBG2(ndpi_struct, "packet_payload begins with 0xf7 or 0xff\n");
l = packet->payload[2] + (packet->payload[3] << 8); // similar to ntohs
NDPI_LOG_DBG2(ndpi_struct, "l = %u \n", l);
while (l <= (packet->payload_packet_len - 4)) {
if (packet->payload[l] == 0xf7) {
u_int16_t temp = (packet->payload[l + 2 + 1] << 8) + packet->payload[l + 2];
NDPI_LOG_DBG2(ndpi_struct, "another f7 visited\n");
if((temp <= 2) || (temp > 1500)) {
NDPI_LOG_DBG2(ndpi_struct, "break\n");
break;
} else {
l += temp;
NDPI_LOG_DBG2(ndpi_struct, "l = %u \n", l);
}
} else {
NDPI_LOG_DBG2(ndpi_struct, "break\n");
break;
}
}
if (l == packet->payload_packet_len) {
NDPI_LOG_DBG2(ndpi_struct, "maybe WARCRAFT3 flow->packet_counter = %u \n",
flow->packet_counter);
if (flow->packet_counter > 2) {
NDPI_LOG_INFO(ndpi_struct, "found WARCRAFT3\n");
ndpi_int_warcraft3_add_connection(ndpi_struct, flow);
return;
}
return;
}
}
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
void init_warcraft3_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id)
{
ndpi_set_bitmask_protocol_detection("Warcraft3", ndpi_struct, *id,
NDPI_PROTOCOL_WARCRAFT3,
ndpi_search_warcraft3,
NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_OR_UDP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
SAVE_DETECTION_BITMASK_AS_UNKNOWN,
ADD_TO_DETECTION_BITMASK);
*id += 1;
}
|