diff options
| -rw-r--r-- | src/core/hle/service/nwm/nwm_uds.cpp | 275 | ||||
| -rw-r--r-- | src/core/hle/service/nwm/uds_connection.cpp | 9 | ||||
| -rw-r--r-- | src/core/hle/service/nwm/uds_connection.h | 5 | ||||
| -rw-r--r-- | src/core/hle/service/nwm/uds_data.cpp | 21 | ||||
| -rw-r--r-- | src/core/hle/service/nwm/uds_data.h | 28 |
5 files changed, 250 insertions, 88 deletions
diff --git a/src/core/hle/service/nwm/nwm_uds.cpp b/src/core/hle/service/nwm/nwm_uds.cpp index 893bbb1e7..4e2af9ae6 100644 --- a/src/core/hle/service/nwm/nwm_uds.cpp +++ b/src/core/hle/service/nwm/nwm_uds.cpp @@ -2,8 +2,10 @@ // Licensed under GPLv2 or any later version // Refer to the license.txt file included. +#include <algorithm> #include <array> #include <cstring> +#include <list> #include <mutex> #include <unordered_map> #include <vector> @@ -37,9 +39,12 @@ static ConnectionStatus connection_status{}; /* Node information about the current network. * The amount of elements in this vector is always the maximum number * of nodes specified in the network configuration. - * The first node is always the host, so this always contains at least 1 entry. + * The first node is always the host. */ -static NodeList node_info(1); +static NodeList node_info; + +// Node information about our own system. +static NodeInfo current_node; // Mapping of bind node ids to their respective events. static std::unordered_map<u32, Kernel::SharedPtr<Kernel::Event>> bind_node_events; @@ -54,6 +59,10 @@ 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 connection status between the emulation thread and the +// network thread. +static std::mutex connection_status_mutex; + // Mutex to synchronize access to the list of received beacons between the emulation thread and the // network thread. static std::mutex beacon_mutex; @@ -63,14 +72,26 @@ static std::mutex beacon_mutex; constexpr size_t MaxBeaconFrames = 15; // List of the last <MaxBeaconFrames> beacons received from the network. -static std::deque<Network::WifiPacket> received_beacons; +static std::list<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::list<Network::WifiPacket> GetReceivedBeacons(const MacAddress& sender) { std::lock_guard<std::mutex> lock(beacon_mutex); - // TODO(Subv): Filter by sender. + if (sender != Network::BroadcastMac) { + std::list<Network::WifiPacket> filtered_list; + const auto beacon = std::find_if(received_beacons.begin(), received_beacons.end(), + [&sender](const Network::WifiPacket& packet) { + return packet.transmitter_address == sender; + }); + if (beacon != received_beacons.end()) { + filtered_list.push_back(*beacon); + // TODO(B3N30): Check if the complete deque is cleared or just the fetched entries + received_beacons.erase(beacon); + } + return filtered_list; + } return std::move(received_beacons); } @@ -83,6 +104,15 @@ void SendPacket(Network::WifiPacket& packet) { // limit is exceeded. void HandleBeaconFrame(const Network::WifiPacket& packet) { std::lock_guard<std::mutex> lock(beacon_mutex); + const auto unique_beacon = + std::find_if(received_beacons.begin(), received_beacons.end(), + [&packet](const Network::WifiPacket& new_packet) { + return new_packet.transmitter_address == packet.transmitter_address; + }); + if (unique_beacon != received_beacons.end()) { + // We already have a beacon from the same mac in the deque, remove the old one; + received_beacons.erase(unique_beacon); + } received_beacons.emplace_back(packet); @@ -91,14 +121,33 @@ void HandleBeaconFrame(const Network::WifiPacket& packet) { received_beacons.pop_front(); } +void HandleAssociationResponseFrame(const Network::WifiPacket& packet) { + auto assoc_result = GetAssociationResult(packet.data); + + ASSERT_MSG(std::get<AssocStatus>(assoc_result) == AssocStatus::Successful, + "Could not join network"); + { + std::lock_guard<std::mutex> lock(connection_status_mutex); + ASSERT(connection_status.status == static_cast<u32>(NetworkStatus::Connecting)); + } + + // Send the EAPoL-Start packet to the server. + using Network::WifiPacket; + WifiPacket eapol_start; + eapol_start.channel = network_channel; + eapol_start.data = GenerateEAPoLStartFrame(std::get<u16>(assoc_result), current_node); + // TODO(B3N30): Encrypt the packet. + eapol_start.destination_address = packet.transmitter_address; + eapol_start.type = WifiPacket::PacketType::Data; + + SendPacket(eapol_start); +} + /* * 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; @@ -113,35 +162,46 @@ static u16 GetNextAvailableNodeId() { * 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; + { + std::lock_guard<std::mutex> lock(connection_status_mutex); + ASSERT(connection_status.status == static_cast<u32>(NetworkStatus::NotConnected)); + + // TODO(Subv): Handle timeout. + + // Send an authentication frame with SEQ1 + 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; + + { + std::lock_guard<std::mutex> lock(connection_status_mutex); + if (connection_status.status != static_cast<u32>(NetworkStatus::ConnectedAsHost)) { + LOG_ERROR(Service_NWM, "Connection sequence aborted, because connection status is %u", + connection_status.status); + return; + } + + 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); } @@ -155,16 +215,23 @@ void SendAssociationResponseFrame(const MacAddress& address) { 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; - + { + std::lock_guard<std::mutex> lock(connection_status_mutex); + if (connection_status.status != static_cast<u32>(NetworkStatus::ConnectedAsHost)) { + LOG_ERROR(Service_NWM, + "Connection sequence aborted, because connection status is %u", + connection_status.status); + return; + } + + // Respond with an authentication response frame with SEQ2 + 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); @@ -180,6 +247,9 @@ void OnWifiPacketReceived(const Network::WifiPacket& packet) { case Network::WifiPacket::PacketType::Authentication: HandleAuthenticationFrame(packet); break; + case Network::WifiPacket::PacketType::AssociationResponse: + HandleAssociationResponseFrame(packet); + break; } } @@ -305,7 +375,7 @@ static void InitializeWithVersion(Interface* self) { u32 sharedmem_size = rp.Pop<u32>(); // Update the node information with the data the game gave us. - rp.PopRaw(node_info[0]); + rp.PopRaw(current_node); u16 version = rp.Pop<u16>(); @@ -315,10 +385,14 @@ static void InitializeWithVersion(Interface* self) { ASSERT_MSG(recv_buffer_memory->size == sharedmem_size, "Invalid shared memory size."); - // Reset the connection status, it contains all zeros after initialization, - // except for the actual status value. - connection_status = {}; - connection_status.status = static_cast<u32>(NetworkStatus::NotConnected); + { + std::lock_guard<std::mutex> lock(connection_status_mutex); + + // Reset the connection status, it contains all zeros after initialization, + // except for the actual status value. + connection_status = {}; + connection_status.status = static_cast<u32>(NetworkStatus::NotConnected); + } IPC::RequestBuilder rb = rp.MakeBuilder(1, 2); rb.Push(RESULT_SUCCESS); @@ -348,12 +422,16 @@ static void GetConnectionStatus(Interface* self) { IPC::RequestBuilder rb = rp.MakeBuilder(13, 0); rb.Push(RESULT_SUCCESS); - rb.PushRaw(connection_status); - - // Reset the bitmask of changed nodes after each call to this - // function to prevent falsely informing games of outstanding - // changes in subsequent calls. - connection_status.changed_nodes = 0; + { + std::lock_guard<std::mutex> lock(connection_status_mutex); + rb.PushRaw(connection_status); + + // Reset the bitmask of changed nodes after each call to this + // function to prevent falsely informing games of outstanding + // changes in subsequent calls. + // TODO(Subv): Find exactly where the NWM module resets this value. + connection_status.changed_nodes = 0; + } LOG_DEBUG(Service_NWM, "called"); } @@ -434,31 +512,36 @@ static void BeginHostingNetwork(Interface* self) { // The real UDS module throws a fatal error if this assert fails. ASSERT_MSG(network_info.max_nodes > 1, "Trying to host a network of only one member."); - connection_status.status = static_cast<u32>(NetworkStatus::ConnectedAsHost); - - // Ensure the application data size is less than the maximum value. - ASSERT_MSG(network_info.application_data_size <= ApplicationDataSize, "Data size is too big."); - - // Set up basic information for this network. - network_info.oui_value = NintendoOUI; - network_info.oui_type = static_cast<u8>(NintendoTagId::NetworkInfo); - - connection_status.max_nodes = network_info.max_nodes; - - // Resize the nodes list to hold max_nodes. - node_info.resize(network_info.max_nodes); - - // There's currently only one node in the network (the host). - connection_status.total_nodes = 1; - network_info.total_nodes = 1; - // The host is always the first node - connection_status.network_node_id = 1; - node_info[0].network_node_id = 1; - connection_status.nodes[0] = connection_status.network_node_id; - // Set the bit 0 in the nodes bitmask to indicate that node 1 is already taken. - connection_status.node_bitmask |= 1; - // Notify the application that the first node was set. - connection_status.changed_nodes |= 1; + { + std::lock_guard<std::mutex> lock(connection_status_mutex); + connection_status.status = static_cast<u32>(NetworkStatus::ConnectedAsHost); + + // Ensure the application data size is less than the maximum value. + ASSERT_MSG(network_info.application_data_size <= ApplicationDataSize, + "Data size is too big."); + + // Set up basic information for this network. + network_info.oui_value = NintendoOUI; + network_info.oui_type = static_cast<u8>(NintendoTagId::NetworkInfo); + + connection_status.max_nodes = network_info.max_nodes; + + // Resize the nodes list to hold max_nodes. + node_info.resize(network_info.max_nodes); + + // There's currently only one node in the network (the host). + connection_status.total_nodes = 1; + network_info.total_nodes = 1; + // The host is always the first node + connection_status.network_node_id = 1; + current_node.network_node_id = 1; + connection_status.nodes[0] = connection_status.network_node_id; + // Set the bit 0 in the nodes bitmask to indicate that node 1 is already taken. + connection_status.node_bitmask |= 1; + // Notify the application that the first node was set. + connection_status.changed_nodes |= 1; + node_info[0] = current_node; + } // If the game has a preferred channel, use that instead. if (network_info.channel != 0) @@ -495,9 +578,13 @@ static void DestroyNetwork(Interface* self) { // Unschedule the beacon broadcast event. CoreTiming::UnscheduleEvent(beacon_broadcast_event, 0); - // TODO(Subv): Check if connection_status is indeed reset after this call. - connection_status = {}; - connection_status.status = static_cast<u8>(NetworkStatus::NotConnected); + { + std::lock_guard<std::mutex> lock(connection_status_mutex); + + // TODO(Subv): Check if connection_status is indeed reset after this call. + connection_status = {}; + connection_status.status = static_cast<u8>(NetworkStatus::NotConnected); + } connection_status_event->Signal(); IPC::RequestBuilder rb = rp.MakeBuilder(1, 0); @@ -540,17 +627,24 @@ static void SendTo(Interface* self) { IPC::RequestBuilder rb = rp.MakeBuilder(1, 0); - if (connection_status.status != static_cast<u32>(NetworkStatus::ConnectedAsClient) && - connection_status.status != static_cast<u32>(NetworkStatus::ConnectedAsHost)) { - rb.Push(ResultCode(ErrorDescription::NotAuthorized, ErrorModule::UDS, - ErrorSummary::InvalidState, ErrorLevel::Status)); - return; - } + u16 network_node_id; - if (dest_node_id == connection_status.network_node_id) { - rb.Push(ResultCode(ErrorDescription::NotFound, ErrorModule::UDS, - ErrorSummary::WrongArgument, ErrorLevel::Status)); - return; + { + std::lock_guard<std::mutex> lock(connection_status_mutex); + if (connection_status.status != static_cast<u32>(NetworkStatus::ConnectedAsClient) && + connection_status.status != static_cast<u32>(NetworkStatus::ConnectedAsHost)) { + rb.Push(ResultCode(ErrorDescription::NotAuthorized, ErrorModule::UDS, + ErrorSummary::InvalidState, ErrorLevel::Status)); + return; + } + + if (dest_node_id == connection_status.network_node_id) { + rb.Push(ResultCode(ErrorDescription::NotFound, ErrorModule::UDS, + ErrorSummary::WrongArgument, ErrorLevel::Status)); + return; + } + + network_node_id = connection_status.network_node_id; } // TODO(Subv): Do something with the flags. @@ -567,8 +661,8 @@ static void SendTo(Interface* self) { // TODO(Subv): Increment the sequence number after each sent packet. u16 sequence_number = 0; - std::vector<u8> data_payload = GenerateDataPayload( - data, data_channel, dest_node_id, connection_status.network_node_id, sequence_number); + std::vector<u8> data_payload = + GenerateDataPayload(data, data_channel, dest_node_id, network_node_id, sequence_number); // TODO(Subv): Retrieve the MAC address of the dest_node_id and our own to encrypt // and encapsulate the payload. @@ -595,6 +689,7 @@ static void GetChannel(Interface* self) { IPC::RequestParser rp(Kernel::GetCommandBuffer(), 0x1A, 0, 0); IPC::RequestBuilder rb = rp.MakeBuilder(2, 0); + std::lock_guard<std::mutex> lock(connection_status_mutex); bool is_connected = connection_status.status != static_cast<u32>(NetworkStatus::NotConnected); u8 channel = is_connected ? network_channel : 0; @@ -766,6 +861,7 @@ static void BeaconBroadcastCallback(u64 userdata, int cycles_late) { * @param network_node_id Network Node Id of the connecting client. */ void OnClientConnected(u16 network_node_id) { + std::lock_guard<std::mutex> lock(connection_status_mutex); ASSERT_MSG(connection_status.status == static_cast<u32>(NetworkStatus::ConnectedAsHost), "Can not accept clients if we're not hosting a network"); ASSERT_MSG(connection_status.total_nodes < connection_status.max_nodes, @@ -827,8 +923,11 @@ NWM_UDS::~NWM_UDS() { connection_status_event = nullptr; recv_buffer_memory = nullptr; - connection_status = {}; - connection_status.status = static_cast<u32>(NetworkStatus::NotConnected); + { + std::lock_guard<std::mutex> lock(connection_status_mutex); + connection_status = {}; + connection_status.status = static_cast<u32>(NetworkStatus::NotConnected); + } CoreTiming::UnscheduleEvent(beacon_broadcast_event, 0); } diff --git a/src/core/hle/service/nwm/uds_connection.cpp b/src/core/hle/service/nwm/uds_connection.cpp index c8a76ec2a..c74f51253 100644 --- a/src/core/hle/service/nwm/uds_connection.cpp +++ b/src/core/hle/service/nwm/uds_connection.cpp @@ -75,5 +75,14 @@ std::vector<u8> GenerateAssocResponseFrame(AssocStatus status, u16 association_i return data; } +std::tuple<AssocStatus, u16> GetAssociationResult(const std::vector<u8>& body) { + AssociationResponseFrame frame; + memcpy(&frame, body.data(), sizeof(frame)); + + constexpr u16 AssociationIdMask = 0x3FFF; + return std::make_tuple(static_cast<AssocStatus>(frame.status_code), + frame.assoc_id & AssociationIdMask); +} + } // namespace NWM } // namespace Service diff --git a/src/core/hle/service/nwm/uds_connection.h b/src/core/hle/service/nwm/uds_connection.h index 73f55a4fd..a664f8471 100644 --- a/src/core/hle/service/nwm/uds_connection.h +++ b/src/core/hle/service/nwm/uds_connection.h @@ -4,6 +4,7 @@ #pragma once +#include <tuple> #include <vector> #include "common/common_types.h" #include "common/swap.h" @@ -47,5 +48,9 @@ AuthenticationSeq GetAuthenticationSeqNumber(const std::vector<u8>& body); /// network id, starting at the frame body. std::vector<u8> GenerateAssocResponseFrame(AssocStatus status, u16 association_id, u32 network_id); +/// Returns a tuple of (association status, association id) from the body of an AssociationResponse +/// frame. +std::tuple<AssocStatus, u16> GetAssociationResult(const std::vector<u8>& body); + } // namespace NWM } // namespace Service diff --git a/src/core/hle/service/nwm/uds_data.cpp b/src/core/hle/service/nwm/uds_data.cpp index 8c6742dba..0fd9b8b8c 100644 --- a/src/core/hle/service/nwm/uds_data.cpp +++ b/src/core/hle/service/nwm/uds_data.cpp @@ -274,5 +274,26 @@ std::vector<u8> GenerateDataPayload(const std::vector<u8>& data, u8 channel, u16 return buffer; } +std::vector<u8> GenerateEAPoLStartFrame(u16 association_id, const NodeInfo& node_info) { + EAPoLStartPacket eapol_start{}; + eapol_start.association_id = association_id; + eapol_start.friend_code_seed = node_info.friend_code_seed; + + for (int i = 0; i < node_info.username.size(); ++i) + eapol_start.username[i] = node_info.username[i]; + + // Note: The network_node_id and unknown bytes seem to be uninitialized in the NWM module. + // TODO(B3N30): The last 8 bytes seem to have a fixed value of 07 88 15 00 04 e9 13 00 in + // EAPoL-Start packets from different 3DSs to the same host during a Super Smash Bros. 4 game. + // Find out what that means. + + std::vector<u8> eapol_buffer(sizeof(EAPoLStartPacket)); + std::memcpy(eapol_buffer.data(), &eapol_start, sizeof(eapol_start)); + + std::vector<u8> buffer = GenerateLLCHeader(EtherType::EAPoL); + buffer.insert(buffer.end(), eapol_buffer.begin(), eapol_buffer.end()); + return buffer; +} + } // namespace NWM } // namespace Service diff --git a/src/core/hle/service/nwm/uds_data.h b/src/core/hle/service/nwm/uds_data.h index a23520a41..76e8f546b 100644 --- a/src/core/hle/service/nwm/uds_data.h +++ b/src/core/hle/service/nwm/uds_data.h @@ -67,6 +67,27 @@ struct DataFrameCryptoCTR { static_assert(sizeof(DataFrameCryptoCTR) == 16, "DataFrameCryptoCTR has the wrong size"); +constexpr u16 EAPoLStartMagic = 0x201; + +/* + * Nintendo EAPoLStartPacket, is used to initaliaze a connection between client and host + */ +struct EAPoLStartPacket { + u16_be magic = EAPoLStartMagic; + u16_be association_id; + // This value is hardcoded to 1 in the NWM module. + u16_be unknown = 1; + INSERT_PADDING_BYTES(2); + + u64_be friend_code_seed; + std::array<u16_be, 10> username; + INSERT_PADDING_BYTES(4); + u16_be network_node_id; + INSERT_PADDING_BYTES(6); +}; + +static_assert(sizeof(EAPoLStartPacket) == 0x30, "EAPoLStartPacket has the wrong size"); + /** * Generates an unencrypted 802.11 data payload. * @returns The generated frame payload. @@ -74,5 +95,12 @@ static_assert(sizeof(DataFrameCryptoCTR) == 16, "DataFrameCryptoCTR has the wron std::vector<u8> GenerateDataPayload(const std::vector<u8>& data, u8 channel, u16 dest_node, u16 src_node, u16 sequence_number); +/* + * Generates an unencrypted 802.11 data frame body with the EAPoL-Start format for UDS + * communication. + * @returns The generated frame body. + */ +std::vector<u8> GenerateEAPoLStartFrame(u16 association_id, const NodeInfo& node_info); + } // namespace NWM } // namespace Service |