mirror of https://git.h3cjp.net/H3cJP/citra.git
86 lines
2.6 KiB
C++
86 lines
2.6 KiB
C++
// Copyright 2017 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <fmt/format.h>
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#include "core/hle/service/nwm/nwm_uds.h"
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#include "core/hle/service/nwm/uds_connection.h"
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namespace Service::NWM {
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// Note: These values were taken from a packet capture of an o3DS XL
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// broadcasting a Super Smash Bros. 4 lobby.
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constexpr u16 DefaultExtraCapabilities = 0x0431;
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std::vector<u8> GenerateAuthenticationFrame(AuthenticationSeq seq) {
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AuthenticationFrame frame{};
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frame.auth_seq = seq;
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std::vector<u8> data(sizeof(frame));
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std::memcpy(data.data(), &frame, sizeof(frame));
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return data;
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}
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AuthenticationSeq GetAuthenticationSeqNumber(std::span<const u8> body) {
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AuthenticationFrame frame;
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std::memcpy(&frame, body.data(), sizeof(frame));
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return frame.auth_seq;
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}
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/**
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* Generates an SSID tag of an 802.11 Beacon frame with an 8-byte character representation of the
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* specified network id as the SSID value.
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* @param network_id The network id to use.
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* @returns A buffer with the SSID tag.
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*/
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static std::vector<u8> GenerateSSIDTag(u32 network_id) {
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constexpr u8 SSIDSize = 8;
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struct {
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u8 id = static_cast<u8>(TagId::SSID);
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u8 size = SSIDSize;
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} tag_header;
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std::vector<u8> buffer(sizeof(tag_header) + SSIDSize);
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std::memcpy(buffer.data(), &tag_header, sizeof(tag_header));
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std::string network_name = fmt::format("{0:08X}", network_id);
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std::memcpy(buffer.data() + sizeof(tag_header), network_name.c_str(), SSIDSize);
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return buffer;
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}
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std::vector<u8> GenerateAssocResponseFrame(AssocStatus status, u16 association_id, u32 network_id) {
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AssociationResponseFrame frame{};
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frame.capabilities = DefaultExtraCapabilities;
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frame.status_code = status;
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// The association id is ORed with this magic value (0xC000)
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constexpr u16 AssociationIdMagic = 0xC000;
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frame.assoc_id = association_id | AssociationIdMagic;
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std::vector<u8> data(sizeof(frame));
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std::memcpy(data.data(), &frame, sizeof(frame));
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auto ssid_tag = GenerateSSIDTag(network_id);
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data.insert(data.end(), ssid_tag.begin(), ssid_tag.end());
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// TODO(Subv): Add the SupportedRates tag.
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// TODO(Subv): Add the DSParameterSet tag.
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// TODO(Subv): Add the ERPInformation tag.
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return data;
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}
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std::tuple<AssocStatus, u16> GetAssociationResult(std::span<const u8> body) {
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AssociationResponseFrame frame;
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std::memcpy(&frame, body.data(), sizeof(frame));
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constexpr u16 AssociationIdMask = 0x3FFF;
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return std::make_tuple(frame.status_code, frame.assoc_id & AssociationIdMask);
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}
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} // namespace Service::NWM
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