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// 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/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");
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);
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(EAPoLStartPacket) == 0x30, "EAPoLStartPacket 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);
} // namespace NWM
} // namespace Service
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