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authorWeiyi Wang <wwylele@gmail.com>2017-09-05 14:03:56 +0200
committerGitHub <noreply@github.com>2017-09-05 14:03:56 +0200
commit617b6974b992b010d2d9ca12e160433815464366 (patch)
tree71da284291575d0d116e055d44b9251648c2602b /src/core/hle
parentMerge pull request #2876 from mailwl/mii-stru (diff)
parentServices/UDS: Remove an old duplicated declaration of WifiPacket. (diff)
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Diffstat (limited to 'src/core/hle')
-rw-r--r--src/core/hle/service/nwm/nwm_uds.cpp165
-rw-r--r--src/core/hle/service/nwm/nwm_uds.h12
-rw-r--r--src/core/hle/service/nwm/uds_beacon.cpp3
-rw-r--r--src/core/hle/service/nwm/uds_beacon.h30
-rw-r--r--src/core/hle/service/nwm/uds_connection.cpp79
-rw-r--r--src/core/hle/service/nwm/uds_connection.h51
6 files changed, 287 insertions, 53 deletions
diff --git a/src/core/hle/service/nwm/nwm_uds.cpp b/src/core/hle/service/nwm/nwm_uds.cpp
index 6dbdff044..893bbb1e7 100644
--- a/src/core/hle/service/nwm/nwm_uds.cpp
+++ b/src/core/hle/service/nwm/nwm_uds.cpp
@@ -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 +54,135 @@ 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();
+}
+
+/*
+ * Returns an available index in the nodes array for the
+ * currently-hosted UDS network.
+ */
+static u16 GetNextAvailableNodeId() {
+ ASSERT_MSG(connection_status.status == static_cast<u32>(NetworkStatus::ConnectedAsHost),
+ "Can not accept clients if we're not hosting a network");
+
+ for (u16 index = 0; index < connection_status.max_nodes; ++index) {
+ if ((connection_status.node_bitmask & (1 << index)) == 0)
+ return index;
+ }
+
+ // Any connection attempts to an already full network should have been refused.
+ ASSERT_MSG(false, "No available connection slots in the network");
+}
+
+/*
+ * Start a connection sequence with an UDS server. The sequence starts by sending an 802.11
+ * authentication frame with SEQ1.
+ */
+void StartConnectionSequence(const MacAddress& server) {
+ ASSERT(connection_status.status == static_cast<u32>(NetworkStatus::NotConnected));
+
+ // TODO(Subv): Handle timeout.
+
+ // Send an authentication frame with SEQ1
+ using Network::WifiPacket;
+ WifiPacket auth_request;
+ auth_request.channel = network_channel;
+ auth_request.data = GenerateAuthenticationFrame(AuthenticationSeq::SEQ1);
+ auth_request.destination_address = server;
+ auth_request.type = WifiPacket::PacketType::Authentication;
+
+ SendPacket(auth_request);
+}
+
+/// Sends an Association Response frame to the specified mac address
+void SendAssociationResponseFrame(const MacAddress& address) {
+ ASSERT_MSG(connection_status.status == static_cast<u32>(NetworkStatus::ConnectedAsHost));
+
+ using Network::WifiPacket;
+ WifiPacket assoc_response;
+ assoc_response.channel = network_channel;
+ // TODO(Subv): This will cause multiple clients to end up with the same association id, but
+ // we're not using that for anything.
+ u16 association_id = 1;
+ assoc_response.data = GenerateAssocResponseFrame(AssocStatus::Successful, association_id,
+ network_info.network_id);
+ assoc_response.destination_address = address;
+ assoc_response.type = WifiPacket::PacketType::AssociationResponse;
+
+ SendPacket(assoc_response);
+}
+
+/*
+ * Handles the authentication request frame and sends the authentication response and association
+ * response frames. Once an Authentication frame with SEQ1 is received by the server, it responds
+ * with an Authentication frame containing SEQ2, and immediately sends an Association response frame
+ * containing the details of the access point and the assigned association id for the new client.
+ */
+void HandleAuthenticationFrame(const Network::WifiPacket& packet) {
+ // Only the SEQ1 auth frame is handled here, the SEQ2 frame doesn't need any special behavior
+ if (GetAuthenticationSeqNumber(packet.data) == AuthenticationSeq::SEQ1) {
+ ASSERT_MSG(connection_status.status == static_cast<u32>(NetworkStatus::ConnectedAsHost));
+
+ // Respond with an authentication response frame with SEQ2
+ using Network::WifiPacket;
+ WifiPacket auth_request;
+ auth_request.channel = network_channel;
+ auth_request.data = GenerateAuthenticationFrame(AuthenticationSeq::SEQ2);
+ auth_request.destination_address = packet.transmitter_address;
+ auth_request.type = WifiPacket::PacketType::Authentication;
+
+ SendPacket(auth_request);
+
+ SendAssociationResponseFrame(packet.transmitter_address);
+ }
+}
+
+/// 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;
+ case Network::WifiPacket::PacketType::Authentication:
+ HandleAuthenticationFrame(packet);
+ break;
+ }
+}
+
/**
* NWM_UDS::Shutdown service function
* Inputs:
@@ -111,8 +243,7 @@ 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 +324,9 @@ 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);
}
@@ -610,32 +744,23 @@ 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);
}
/*
- * Returns an available index in the nodes array for the
- * currently-hosted UDS network.
- */
-static u32 GetNextAvailableNodeId() {
- ASSERT_MSG(connection_status.status == static_cast<u32>(NetworkStatus::ConnectedAsHost),
- "Can not accept clients if we're not hosting a network");
-
- for (unsigned index = 0; index < connection_status.max_nodes; ++index) {
- if ((connection_status.node_bitmask & (1 << index)) == 0)
- return index;
- }
-
- // Any connection attempts to an already full network should have been refused.
- ASSERT_MSG(false, "No available connection slots in the network");
-}
-
-/*
* Called when a client connects to an UDS network we're hosting,
* updates the connection status and signals the update event.
* @param network_node_id Network Node Id of the connecting client.
diff --git a/src/core/hle/service/nwm/nwm_uds.h b/src/core/hle/service/nwm/nwm_uds.h
index 141f49f9c..f1caaf974 100644
--- a/src/core/hle/service/nwm/nwm_uds.h
+++ b/src/core/hle/service/nwm/nwm_uds.h
@@ -42,6 +42,7 @@ using NodeList = std::vector<NodeInfo>;
enum class NetworkStatus {
NotConnected = 3,
ConnectedAsHost = 6,
+ Connecting = 7,
ConnectedAsClient = 9,
ConnectedAsSpectator = 10,
};
@@ -85,6 +86,17 @@ static_assert(offsetof(NetworkInfo, oui_value) == 0xC, "oui_value is at the wron
static_assert(offsetof(NetworkInfo, wlan_comm_id) == 0x10, "wlancommid is at the wrong offset.");
static_assert(sizeof(NetworkInfo) == 0x108, "NetworkInfo has incorrect size.");
+/// Additional block tag ids in the Beacon and Association Response frames
+enum class TagId : u8 {
+ SSID = 0,
+ SupportedRates = 1,
+ DSParameterSet = 2,
+ TrafficIndicationMap = 5,
+ CountryInformation = 7,
+ ERPInformation = 42,
+ VendorSpecific = 221
+};
+
class NWM_UDS final : public Interface {
public:
NWM_UDS();
diff --git a/src/core/hle/service/nwm/uds_beacon.cpp b/src/core/hle/service/nwm/uds_beacon.cpp
index 6332b404c..552eaf65e 100644
--- a/src/core/hle/service/nwm/uds_beacon.cpp
+++ b/src/core/hle/service/nwm/uds_beacon.cpp
@@ -325,8 +325,5 @@ std::vector<u8> GenerateBeaconFrame(const NetworkInfo& network_info, const NodeL
return buffer;
}
-std::deque<WifiPacket> GetReceivedPackets(WifiPacket::PacketType type, const MacAddress& sender) {
- return {};
-}
} // namespace NWM
} // namespace Service
diff --git a/src/core/hle/service/nwm/uds_beacon.h b/src/core/hle/service/nwm/uds_beacon.h
index caacf4c6f..50cc76da2 100644
--- a/src/core/hle/service/nwm/uds_beacon.h
+++ b/src/core/hle/service/nwm/uds_beacon.h
@@ -17,17 +17,6 @@ namespace NWM {
using MacAddress = std::array<u8, 6>;
constexpr std::array<u8, 3> NintendoOUI = {0x00, 0x1F, 0x32};
-/// Additional block tag ids in the Beacon frames
-enum class TagId : u8 {
- SSID = 0,
- SupportedRates = 1,
- DSParameterSet = 2,
- TrafficIndicationMap = 5,
- CountryInformation = 7,
- ERPInformation = 42,
- VendorSpecific = 221
-};
-
/**
* Internal vendor-specific tag ids as stored inside
* VendorSpecific blocks in the Beacon frames.
@@ -135,20 +124,6 @@ struct BeaconData {
static_assert(sizeof(BeaconData) == 0x12, "BeaconData has incorrect size.");
-/// Information about a received WiFi packet.
-/// Acts as our own 802.11 header.
-struct WifiPacket {
- enum class PacketType { Beacon, Data };
-
- PacketType type; ///< The type of 802.11 frame, Beacon / Data.
-
- /// Raw 802.11 frame data, starting at the management frame header for management frames.
- std::vector<u8> data;
- MacAddress transmitter_address; ///< Mac address of the transmitter.
- MacAddress destination_address; ///< Mac address of the receiver.
- u8 channel; ///< WiFi channel where this frame was transmitted.
-};
-
/**
* Decrypts the beacon data buffer for the network described by `network_info`.
*/
@@ -161,10 +136,5 @@ void DecryptBeaconData(const NetworkInfo& network_info, std::vector<u8>& buffer)
*/
std::vector<u8> GenerateBeaconFrame(const NetworkInfo& network_info, const NodeList& nodes);
-/**
- * Returns a list of received 802.11 frames from the specified sender
- * matching the type since the last call.
- */
-std::deque<WifiPacket> GetReceivedPackets(WifiPacket::PacketType type, const MacAddress& sender);
} // namespace NWM
} // namespace Service
diff --git a/src/core/hle/service/nwm/uds_connection.cpp b/src/core/hle/service/nwm/uds_connection.cpp
new file mode 100644
index 000000000..c8a76ec2a
--- /dev/null
+++ b/src/core/hle/service/nwm/uds_connection.cpp
@@ -0,0 +1,79 @@
+// 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
diff --git a/src/core/hle/service/nwm/uds_connection.h b/src/core/hle/service/nwm/uds_connection.h
new file mode 100644
index 000000000..73f55a4fd
--- /dev/null
+++ b/src/core/hle/service/nwm/uds_connection.h
@@ -0,0 +1,51 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <vector>
+#include "common/common_types.h"
+#include "common/swap.h"
+#include "core/hle/service/service.h"
+
+namespace Service {
+namespace NWM {
+
+/// Sequence number of the 802.11 authentication frames.
+enum class AuthenticationSeq : u16 { SEQ1 = 1, SEQ2 = 2 };
+
+enum class AuthAlgorithm : u16 { OpenSystem = 0 };
+
+enum class AuthStatus : u16 { Successful = 0 };
+
+enum class AssocStatus : u16 { Successful = 0 };
+
+struct AuthenticationFrame {
+ u16_le auth_algorithm = static_cast<u16>(AuthAlgorithm::OpenSystem);
+ u16_le auth_seq;
+ u16_le status_code = static_cast<u16>(AuthStatus::Successful);
+};
+
+static_assert(sizeof(AuthenticationFrame) == 6, "AuthenticationFrame has wrong size");
+
+struct AssociationResponseFrame {
+ u16_le capabilities;
+ u16_le status_code;
+ u16_le assoc_id;
+};
+
+static_assert(sizeof(AssociationResponseFrame) == 6, "AssociationResponseFrame has wrong size");
+
+/// Generates an 802.11 authentication frame, starting at the frame body.
+std::vector<u8> GenerateAuthenticationFrame(AuthenticationSeq seq);
+
+/// Returns the sequence number from the body of an Authentication frame.
+AuthenticationSeq GetAuthenticationSeqNumber(const std::vector<u8>& body);
+
+/// Generates an 802.11 association response frame with the specified status, association id and
+/// network id, starting at the frame body.
+std::vector<u8> GenerateAssocResponseFrame(AssocStatus status, u16 association_id, u32 network_id);
+
+} // namespace NWM
+} // namespace Service