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
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
|
// Copyright 2017 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include <vector>
#include "common/common_types.h"
#include "common/swap.h"
#include "core/hle/service/nwm/uds_beacon.h"
#include "core/hle/service/service.h"
namespace Service {
namespace NWM {
enum class SAP : u8 { SNAPExtensionUsed = 0xAA };
enum class PDUControl : u8 { UnnumberedInformation = 3 };
enum class EtherType : u16 { SecureData = 0x876D, EAPoL = 0x888E };
/*
* 802.2 header, UDS packets always use SNAP for these headers,
* which means the dsap and ssap are always SNAPExtensionUsed (0xAA)
* and the OUI is always 0.
*/
struct LLCHeader {
u8 dsap = static_cast<u8>(SAP::SNAPExtensionUsed);
u8 ssap = static_cast<u8>(SAP::SNAPExtensionUsed);
u8 control = static_cast<u8>(PDUControl::UnnumberedInformation);
std::array<u8, 3> OUI = {};
u16_be protocol;
};
static_assert(sizeof(LLCHeader) == 8, "LLCHeader has the wrong size");
/*
* Nintendo SecureData header, every UDS packet contains one,
* it is used to store metadata about the transmission such as
* the source and destination network node ids.
*/
struct SecureDataHeader {
// TODO(Subv): It is likely that the first 4 bytes of this header are
// actually part of another container protocol.
u16_be protocol_size;
INSERT_PADDING_BYTES(2);
u16_be securedata_size;
u8 is_management;
u8 data_channel;
u16_be sequence_number;
u16_be dest_node_id;
u16_be src_node_id;
};
static_assert(sizeof(SecureDataHeader) == 14, "SecureDataHeader has the wrong size");
/*
* The raw bytes of this structure are the CTR used in the encryption (AES-CTR)
* process used to generate the CCMP key for data frame encryption.
*/
struct DataFrameCryptoCTR {
u32_le wlan_comm_id;
u32_le network_id;
std::array<u8, 6> host_mac;
u16_le id;
};
static_assert(sizeof(DataFrameCryptoCTR) == 16, "DataFrameCryptoCTR has the wrong size");
struct EAPoLNodeInfo {
u64_be friend_code_seed;
std::array<u16_be, 10> username;
INSERT_PADDING_BYTES(4);
u16_be network_node_id;
INSERT_PADDING_BYTES(6);
};
static_assert(sizeof(EAPoLNodeInfo) == 0x28, "EAPoLNodeInfo has the wrong size");
constexpr u16 EAPoLStartMagic = 0x201;
/*
* Nintendo EAPoLStartPacket, is used to initaliaze a connection between client and host
*/
struct EAPoLStartPacket {
u16_be magic = EAPoLStartMagic;
u16_be association_id;
// This value is hardcoded to 1 in the NWM module.
u16_be unknown = 1;
INSERT_PADDING_BYTES(2);
EAPoLNodeInfo node;
};
static_assert(sizeof(EAPoLStartPacket) == 0x30, "EAPoLStartPacket has the wrong size");
constexpr u16 EAPoLLogoffMagic = 0x202;
struct EAPoLLogoffPacket {
u16_be magic = EAPoLLogoffMagic;
INSERT_PADDING_BYTES(2);
u16_be assigned_node_id;
MacAddress client_mac_address;
INSERT_PADDING_BYTES(6);
u8 connected_nodes;
u8 max_nodes;
INSERT_PADDING_BYTES(4);
std::array<EAPoLNodeInfo, UDSMaxNodes> nodes;
};
static_assert(sizeof(EAPoLLogoffPacket) == 0x298, "EAPoLLogoffPacket has the wrong size");
/**
* Generates an unencrypted 802.11 data payload.
* @returns The generated frame payload.
*/
std::vector<u8> GenerateDataPayload(const std::vector<u8>& data, u8 channel, u16 dest_node,
u16 src_node, u16 sequence_number);
/*
* Generates an unencrypted 802.11 data frame body with the EAPoL-Start format for UDS
* communication.
* @returns The generated frame body.
*/
std::vector<u8> GenerateEAPoLStartFrame(u16 association_id, const NodeInfo& node_info);
/*
* Returns the EtherType of the specified 802.11 frame.
*/
EtherType GetFrameEtherType(const std::vector<u8>& frame);
/*
* Returns the EAPoL type (Start / Logoff) of the specified 802.11 frame.
* Note: The frame *must* be an EAPoL frame.
*/
u16 GetEAPoLFrameType(const std::vector<u8>& frame);
/*
* Returns a deserialized NodeInfo structure from the information inside an EAPoL-Start packet
* encapsulated in an 802.11 data frame.
*/
NodeInfo DeserializeNodeInfoFromFrame(const std::vector<u8>& frame);
/*
* Returns a NodeInfo constructed from the data in the specified EAPoLNodeInfo.
*/
NodeInfo DeserializeNodeInfo(const EAPoLNodeInfo& node);
/*
* Generates an unencrypted 802.11 data frame body with the EAPoL-Logoff format for UDS
* communication.
* @returns The generated frame body.
*/
std::vector<u8> GenerateEAPoLLogoffFrame(const MacAddress& mac_address, u16 network_node_id,
const NodeList& nodes, u8 max_nodes, u8 total_nodes);
/*
* Returns a EAPoLLogoffPacket representing the specified 802.11-encapsulated data frame.
*/
EAPoLLogoffPacket ParseEAPoLLogoffFrame(const std::vector<u8>& frame);
} // namespace NWM
} // namespace Service
|
