/src/ndpi/src/lib/protocols/rmcp.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * rmcp.c |
3 | | * |
4 | | * Copyright (C) 2023 - ntop.org |
5 | | * |
6 | | * This file is part of nDPI, an open source deep packet inspection |
7 | | * library based on the OpenDPI and PACE technology by ipoque GmbH |
8 | | * |
9 | | * nDPI is free software: you can redistribute it and/or modify |
10 | | * it under the terms of the GNU Lesser General Public License as published by |
11 | | * the Free Software Foundation, either version 3 of the License, or |
12 | | * (at your option) any later version. |
13 | | * |
14 | | * nDPI is distributed in the hope that it will be useful, |
15 | | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
17 | | * GNU Lesser General Public License for more details. |
18 | | * |
19 | | * You should have received a copy of the GNU Lesser General Public License |
20 | | * along with nDPI. If not, see <http://www.gnu.org/licenses/>. |
21 | | * |
22 | | */ |
23 | | |
24 | | #include "ndpi_protocol_ids.h" |
25 | | |
26 | | #define NDPI_CURRENT_PROTO NDPI_PROTOCOL_RMCP |
27 | | |
28 | | #include "ndpi_api.h" |
29 | | #include "ndpi_private.h" |
30 | | |
31 | | PACK_ON |
32 | | struct rmcp_header { |
33 | | uint8_t version; |
34 | | uint8_t reserved; |
35 | | uint8_t sequence; |
36 | | #if defined(__BIG_ENDIAN__) |
37 | | uint8_t type : 1; // Either Normal RMCP (0) or ACK (1) |
38 | | uint8_t class : 7; |
39 | | #elif defined(__LITTLE_ENDIAN__) |
40 | | uint8_t class : 7; |
41 | | uint8_t type : 1; // Either Normal RMCP (0) or ACK (1) |
42 | | #else |
43 | | #error "Missing endian macro definitions." |
44 | | #endif |
45 | | } PACK_OFF; |
46 | | |
47 | | static void ndpi_int_rmcp_add_connection(struct ndpi_detection_module_struct *ndpi_struct, |
48 | | struct ndpi_flow_struct *flow) |
49 | 0 | { |
50 | 0 | ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_RMCP, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI); |
51 | 0 | } |
52 | | |
53 | | static void ndpi_search_rmcp(struct ndpi_detection_module_struct *ndpi_struct, |
54 | | struct ndpi_flow_struct *flow) |
55 | 0 | { |
56 | 0 | struct ndpi_packet_struct const * const packet = &ndpi_struct->packet; |
57 | |
|
58 | 0 | NDPI_LOG_DBG(ndpi_struct, "search RMCP\n"); |
59 | |
|
60 | 0 | if (packet->payload_packet_len < sizeof(struct rmcp_header)) { |
61 | 0 | NDPI_EXCLUDE_DISSECTOR(ndpi_struct, flow); |
62 | 0 | return; |
63 | 0 | } |
64 | | |
65 | 0 | struct rmcp_header const * const rmcp_header = (struct rmcp_header *)packet->payload; |
66 | |
|
67 | 0 | if (rmcp_header->version != 0x06 || rmcp_header->reserved != 0x00) { |
68 | 0 | NDPI_EXCLUDE_DISSECTOR(ndpi_struct, flow); |
69 | 0 | return; |
70 | 0 | } |
71 | | |
72 | 0 | if (rmcp_header->type != 0 && rmcp_header->sequence == 0xFF) { |
73 | | // No ACK allowed if SEQUENCE number is 255. |
74 | 0 | NDPI_EXCLUDE_DISSECTOR(ndpi_struct, flow); |
75 | 0 | return; |
76 | 0 | } |
77 | | |
78 | 0 | if (rmcp_header->class != 0x06 /* Alert Standard Forum (ASF)*/ |
79 | 0 | && rmcp_header->class != 0x07 /* Intelligent Platform Management Interface (IPMI) */) |
80 | 0 | { |
81 | 0 | NDPI_EXCLUDE_DISSECTOR(ndpi_struct, flow); |
82 | 0 | return; |
83 | 0 | } |
84 | | |
85 | 0 | ndpi_int_rmcp_add_connection(ndpi_struct, flow); |
86 | 0 | } |
87 | | |
88 | | |
89 | | void init_rmcp_dissector(struct ndpi_detection_module_struct *ndpi_struct) |
90 | 0 | { |
91 | 0 | register_dissector("RMCP", ndpi_struct, |
92 | 0 | ndpi_search_rmcp, |
93 | 0 | NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_UDP_WITH_PAYLOAD, |
94 | 0 | 1, NDPI_PROTOCOL_RMCP); |
95 | 0 | } |
96 | | |