/src/ndpi/src/lib/protocols/teso.c
Line | Count | Source |
1 | | /* |
2 | | * teso.c |
3 | | * |
4 | | * The Elder Scrolls Online |
5 | | * |
6 | | * Copyright (C) 2024 - ntop.org |
7 | | * Copyright (C) 2024 - V.G <v.gavrilov@securitycode.ru> |
8 | | * |
9 | | * This file is part of nDPI, an open source deep packet inspection |
10 | | * library based on the OpenDPI and PACE technology by ipoque GmbH |
11 | | * |
12 | | * nDPI is free software: you can redistribute it and/or modify |
13 | | * it under the terms of the GNU Lesser General Public License as published by |
14 | | * the Free Software Foundation, either version 3 of the License, or |
15 | | * (at your option) any later version. |
16 | | * |
17 | | * nDPI is distributed in the hope that it will be useful, |
18 | | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
19 | | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
20 | | * GNU Lesser General Public License for more details. |
21 | | * |
22 | | * You should have received a copy of the GNU Lesser General Public License |
23 | | * along with nDPI. If not, see <http://www.gnu.org/licenses/>. |
24 | | * |
25 | | */ |
26 | | |
27 | | #include "ndpi_protocol_ids.h" |
28 | | |
29 | | #define NDPI_CURRENT_PROTO NDPI_PROTOCOL_TESO |
30 | | |
31 | | #include "ndpi_api.h" |
32 | | #include "ndpi_private.h" |
33 | | |
34 | | static void ndpi_int_teso_add_connection(struct ndpi_detection_module_struct * const ndpi_struct, |
35 | | struct ndpi_flow_struct * const flow) |
36 | 0 | { |
37 | 0 | NDPI_LOG_INFO(ndpi_struct, "found TES Online\n"); |
38 | 0 | ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_TESO, |
39 | 0 | NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI); |
40 | 0 | } |
41 | | |
42 | | static void ndpi_search_teso(struct ndpi_detection_module_struct *ndpi_struct, |
43 | | struct ndpi_flow_struct *flow) |
44 | 0 | { |
45 | 0 | struct ndpi_packet_struct const * const packet = &ndpi_struct->packet; |
46 | |
|
47 | 0 | NDPI_LOG_DBG(ndpi_struct, "search TES Online\n"); |
48 | |
|
49 | 0 | if (packet->payload_packet_len < 600 || |
50 | 0 | ntohl(get_u_int32_t(packet->payload, 0)) != (u_int32_t)(packet->payload_packet_len-4)) |
51 | 0 | { |
52 | 0 | NDPI_EXCLUDE_DISSECTOR(ndpi_struct, flow); |
53 | 0 | return; |
54 | 0 | } |
55 | | |
56 | | /* |
57 | | * I'd like to use just memcmp and a couple ifs here, but the offset to |
58 | | * the string "eso.live" or the 0x8B789C01 byte sequence can be different - |
59 | | * it varies by the amount of characters in the account name, weather on Mars, |
60 | | * etc. |
61 | | */ |
62 | | |
63 | 0 | const u_int8_t magic[] = { 0x8B, 0x78, 0x9C, 0x01 }; |
64 | |
|
65 | 0 | if (ndpi_memmem(packet->payload, packet->payload_packet_len, "eso.live", |
66 | 0 | NDPI_STATICSTRING_LEN("eso.live"))) |
67 | 0 | { |
68 | 0 | ndpi_int_teso_add_connection(ndpi_struct, flow); |
69 | 0 | return; |
70 | 0 | } |
71 | 0 | else if (ndpi_memmem(packet->payload, packet->payload_packet_len, magic, |
72 | 0 | sizeof(magic))) |
73 | 0 | { |
74 | 0 | ndpi_int_teso_add_connection(ndpi_struct, flow); |
75 | 0 | return; |
76 | 0 | } |
77 | | |
78 | 0 | NDPI_EXCLUDE_DISSECTOR(ndpi_struct, flow); |
79 | 0 | } |
80 | | |
81 | | void init_teso_dissector(struct ndpi_detection_module_struct *ndpi_struct) |
82 | 0 | { |
83 | 0 | register_dissector("TES_Online", ndpi_struct, |
84 | 0 | ndpi_search_teso, |
85 | 0 | NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION, |
86 | 0 | 1, NDPI_PROTOCOL_TESO); |
87 | 0 | } |