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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.

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);