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Services/UDS: Store the received beacon frames until RecvBeaconBroadcastData is called, up to 15 beacons at the same time, removing any older beacon frames when the limit is exceeded.
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@ -4,6 +4,7 @@
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#include <array>
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#include <cstring>
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#include <mutex>
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#include <unordered_map>
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#include <vector>
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#include "common/common_types.h"
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@ -15,8 +16,10 @@
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#include "core/hle/result.h"
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#include "core/hle/service/nwm/nwm_uds.h"
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#include "core/hle/service/nwm/uds_beacon.h"
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#include "core/hle/service/nwm/uds_connection.h"
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#include "core/hle/service/nwm/uds_data.h"
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#include "core/memory.h"
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#include "network/network.h"
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namespace Service {
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namespace NWM {
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@ -51,6 +54,52 @@ static NetworkInfo network_info;
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// Event that will generate and send the 802.11 beacon frames.
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static int beacon_broadcast_event;
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// Mutex to synchronize access to the list of received beacons between the emulation thread and the
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// network thread.
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static std::mutex beacon_mutex;
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// Number of beacons to store before we start dropping the old ones.
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// TODO(Subv): Find a more accurate value for this limit.
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constexpr size_t MaxBeaconFrames = 15;
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// List of the last <MaxBeaconFrames> beacons received from the network.
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static std::deque<Network::WifiPacket> received_beacons;
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/**
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* Returns a list of received 802.11 beacon frames from the specified sender since the last call.
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*/
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std::deque<Network::WifiPacket> GetReceivedBeacons(const MacAddress& sender) {
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std::lock_guard<std::mutex> lock(beacon_mutex);
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// TODO(Subv): Filter by sender.
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return std::move(received_beacons);
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}
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/// Sends a WifiPacket to the room we're currently connected to.
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void SendPacket(Network::WifiPacket& packet) {
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// TODO(Subv): Implement.
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}
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// Inserts the received beacon frame in the beacon queue and removes any older beacons if the size
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// limit is exceeded.
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void HandleBeaconFrame(const Network::WifiPacket& packet) {
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std::lock_guard<std::mutex> lock(beacon_mutex);
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received_beacons.emplace_back(packet);
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// Discard old beacons if the buffer is full.
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if (received_beacons.size() > MaxBeaconFrames)
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received_beacons.pop_front();
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}
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/// Callback to parse and handle a received wifi packet.
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void OnWifiPacketReceived(const Network::WifiPacket& packet) {
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switch (packet.type) {
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case Network::WifiPacket::PacketType::Beacon:
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HandleBeaconFrame(packet);
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break;
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}
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}
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/**
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* NWM_UDS::Shutdown service function
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* Inputs:
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@ -111,8 +160,7 @@ static void RecvBeaconBroadcastData(Interface* self) {
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u32 total_size = sizeof(BeaconDataReplyHeader);
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// Retrieve all beacon frames that were received from the desired mac address.
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std::deque<WifiPacket> beacons =
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GetReceivedPackets(WifiPacket::PacketType::Beacon, mac_address);
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auto beacons = GetReceivedBeacons(mac_address);
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BeaconDataReplyHeader data_reply_header{};
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data_reply_header.total_entries = beacons.size();
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@ -193,6 +241,9 @@ static void InitializeWithVersion(Interface* self) {
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rb.Push(RESULT_SUCCESS);
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rb.PushCopyHandles(Kernel::g_handle_table.Create(connection_status_event).Unwrap());
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// TODO(Subv): Connect the OnWifiPacketReceived function to the wifi packet received callback of
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// the room we're currently in.
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LOG_DEBUG(Service_NWM, "called sharedmem_size=0x%08X, version=0x%08X, sharedmem_handle=0x%08X",
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sharedmem_size, version, sharedmem_handle);
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}
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@ -610,9 +661,17 @@ static void BeaconBroadcastCallback(u64 userdata, int cycles_late) {
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if (connection_status.status != static_cast<u32>(NetworkStatus::ConnectedAsHost))
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return;
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// TODO(Subv): Actually send the beacon.
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std::vector<u8> frame = GenerateBeaconFrame(network_info, node_info);
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using Network::WifiPacket;
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WifiPacket packet;
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packet.type = WifiPacket::PacketType::Beacon;
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packet.data = std::move(frame);
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packet.destination_address = Network::BroadcastMac;
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packet.channel = network_channel;
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SendPacket(packet);
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// Start broadcasting the network, send a beacon frame every 102.4ms.
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CoreTiming::ScheduleEvent(msToCycles(DefaultBeaconInterval * MillisecondsPerTU) - cycles_late,
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beacon_broadcast_event, 0);
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