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