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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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This commit is contained in:
Subv 2017-07-17 09:39:12 -05:00
parent 54411bef4e
commit 2e9f544ecc
1 changed files with 62 additions and 3 deletions
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65
src/core/hle/service/nwm/nwm_uds.cpp
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@ -4,6 +4,7 @@
#include <array>
#include <cstring>
#include <mutex>
#include <unordered_map>
#include <vector>
#include "common/common_types.h"
@ -15,8 +16,10 @@
#include "core/hle/result.h"
#include "core/hle/service/nwm/nwm_uds.h"
#include "core/hle/service/nwm/uds_beacon.h"
#include "core/hle/service/nwm/uds_connection.h"
#include "core/hle/service/nwm/uds_data.h"
#include "core/memory.h"
#include "network/network.h"
namespace Service {
namespace NWM {
@ -51,6 +54,52 @@ static NetworkInfo network_info;
// Event that will generate and send the 802.11 beacon frames.
static int beacon_broadcast_event;
// Mutex to synchronize access to the list of received beacons between the emulation thread and the
// network thread.
static std::mutex beacon_mutex;
// Number of beacons to store before we start dropping the old ones.
// TODO(Subv): Find a more accurate value for this limit.
constexpr size_t MaxBeaconFrames = 15;
// List of the last <MaxBeaconFrames> beacons received from the network.
static std::deque<Network::WifiPacket> received_beacons;
/**
* Returns a list of received 802.11 beacon frames from the specified sender since the last call.
*/
std::deque<Network::WifiPacket> GetReceivedBeacons(const MacAddress& sender) {
std::lock_guard<std::mutex> lock(beacon_mutex);
// TODO(Subv): Filter by sender.
return std::move(received_beacons);
}
/// Sends a WifiPacket to the room we're currently connected to.
void SendPacket(Network::WifiPacket& packet) {
// TODO(Subv): Implement.
}
// Inserts the received beacon frame in the beacon queue and removes any older beacons if the size
// limit is exceeded.
void HandleBeaconFrame(const Network::WifiPacket& packet) {
std::lock_guard<std::mutex> lock(beacon_mutex);
received_beacons.emplace_back(packet);
// Discard old beacons if the buffer is full.
if (received_beacons.size() > MaxBeaconFrames)
received_beacons.pop_front();
}
/// Callback to parse and handle a received wifi packet.
void OnWifiPacketReceived(const Network::WifiPacket& packet) {
switch (packet.type) {
case Network::WifiPacket::PacketType::Beacon:
HandleBeaconFrame(packet);
break;
}
}
/**
* NWM_UDS::Shutdown service function
* Inputs:
@ -111,8 +160,7 @@ static void RecvBeaconBroadcastData(Interface* self) {
u32 total_size = sizeof(BeaconDataReplyHeader);
// Retrieve all beacon frames that were received from the desired mac address.
std::deque<WifiPacket> beacons =
GetReceivedPackets(WifiPacket::PacketType::Beacon, mac_address);
auto beacons = GetReceivedBeacons(mac_address);
BeaconDataReplyHeader data_reply_header{};
data_reply_header.total_entries = beacons.size();
@ -193,6 +241,9 @@ static void InitializeWithVersion(Interface* self) {
rb.Push(RESULT_SUCCESS);
rb.PushCopyHandles(Kernel::g_handle_table.Create(connection_status_event).Unwrap());
// TODO(Subv): Connect the OnWifiPacketReceived function to the wifi packet received callback of
// the room we're currently in.
LOG_DEBUG(Service_NWM, "called sharedmem_size=0x%08X, version=0x%08X, sharedmem_handle=0x%08X",
sharedmem_size, version, sharedmem_handle);
}
@ -610,9 +661,17 @@ static void BeaconBroadcastCallback(u64 userdata, int cycles_late) {
if (connection_status.status != static_cast<u32>(NetworkStatus::ConnectedAsHost))
return;
// TODO(Subv): Actually send the beacon.
std::vector<u8> frame = GenerateBeaconFrame(network_info, node_info);
using Network::WifiPacket;
WifiPacket packet;
packet.type = WifiPacket::PacketType::Beacon;
packet.data = std::move(frame);
packet.destination_address = Network::BroadcastMac;
packet.channel = network_channel;
SendPacket(packet);
// Start broadcasting the network, send a beacon frame every 102.4ms.
CoreTiming::ScheduleEvent(msToCycles(DefaultBeaconInterval * MillisecondsPerTU) - cycles_late,
beacon_broadcast_event, 0);