mirrors/citra
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Merge pull request #2989 from B3n30/sendTo_PullPacket_Bind

Browse source 
Service/UDS: Implement Bind, Unbind, SendTo, PullPacket, and GetNodeInformation
This commit is contained in:
Sebastian Valle 2017-11-04 10:58:49 -05:00 committed by GitHub
commit 3fe9b332bc
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
3 changed files with 352 additions and 57 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

353
src/core/hle/service/nwm/nwm_uds.cpp
View file

@ -4,6 +4,7 @@
#include <algorithm>
#include <array>
#include <atomic>
#include <cstring>
#include <list>
#include <mutex>
@ -27,6 +28,12 @@
namespace Service {
namespace NWM {
namespace ErrCodes {
enum {
NotInitialized = 2,
};
} // namespace ErrCodes
// Event that is signaled every time the connection status changes.
static Kernel::SharedPtr<Kernel::Event> connection_status_event;
@ -37,6 +44,8 @@ static Kernel::SharedPtr<Kernel::SharedMemory> recv_buffer_memory;
// Connection status of this 3DS.
static ConnectionStatus connection_status{};
static std::atomic<bool> initialized(false);
/* 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.
@ -47,8 +56,17 @@ 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;
struct BindNodeData {
u32 bind_node_id; ///< Id of the bind node associated with this data.
u8 channel; ///< Channel that this bind node was bound to.
u16 network_node_id; ///< Node id this bind node is associated with, only packets from this
/// network node will be received.
Kernel::SharedPtr<Kernel::Event> event; ///< Receive event for this bind node.
std::deque<std::vector<u8>> received_packets; ///< List of packets received on this channel.
};
// Mapping of data channels to their internal data.
static std::unordered_map<u32, BindNodeData> channel_data;
// The WiFi network channel that the network is currently on.
// Since we're not actually interacting with physical radio waves, this is just a dummy value.
@ -75,6 +93,9 @@ constexpr size_t MaxBeaconFrames = 15;
// List of the last <MaxBeaconFrames> beacons received from the network.
static std::list<Network::WifiPacket> received_beacons;
// Network node id used when a SecureData packet is addressed to every connected node.
constexpr u16 BroadcastNetworkNodeId = 0xFFFF;
/**
* Returns a list of received 802.11 beacon frames from the specified sender since the last call.
*/
@ -159,7 +180,9 @@ void HandleAssociationResponseFrame(const Network::WifiPacket& packet) {
}
static void HandleEAPoLPacket(const Network::WifiPacket& packet) {
std::lock_guard<std::mutex> lock(connection_status_mutex);
std::unique_lock<std::recursive_mutex> hle_lock(HLE::g_hle_lock, std::defer_lock);
std::unique_lock<std::mutex> lock(connection_status_mutex, std::defer_lock);
std::lock(hle_lock, lock);
if (GetEAPoLFrameType(packet.data) == EAPoLStartMagic) {
if (connection_status.status != static_cast<u32>(NetworkStatus::ConnectedAsHost)) {
@ -205,10 +228,9 @@ static void HandleEAPoLPacket(const Network::WifiPacket& packet) {
SendPacket(eapol_logoff);
// TODO(B3N30): Broadcast updated node list
// The 3ds does this presumably to support spectators.
std::lock_guard<std::recursive_mutex> lock(HLE::g_hle_lock);
connection_status_event->Signal();
} else {
if (connection_status.status != static_cast<u32>(NetworkStatus::NotConnected)) {
if (connection_status.status != static_cast<u32>(NetworkStatus::Connecting)) {
LOG_DEBUG(Service_NWM, "Connection sequence aborted, because connection status is %u",
connection_status.status);
return;
@ -237,11 +259,63 @@ static void HandleEAPoLPacket(const Network::WifiPacket& packet) {
// Some games require ConnectToNetwork to block, for now it doesn't
// If blocking is implemented this lock needs to be changed,
// otherwise it might cause deadlocks
std::lock_guard<std::recursive_mutex> lock(HLE::g_hle_lock);
connection_status_event->Signal();
}
}
static void HandleSecureDataPacket(const Network::WifiPacket& packet) {
auto secure_data = ParseSecureDataHeader(packet.data);
std::unique_lock<std::recursive_mutex> hle_lock(HLE::g_hle_lock, std::defer_lock);
std::unique_lock<std::mutex> lock(connection_status_mutex, std::defer_lock);
std::lock(hle_lock, lock);
if (secure_data.src_node_id == connection_status.network_node_id) {
// Ignore packets that came from ourselves.
return;
}
if (secure_data.dest_node_id != connection_status.network_node_id &&
secure_data.dest_node_id != BroadcastNetworkNodeId) {
// The packet wasn't addressed to us, we can only act as a router if we're the host.
// However, we might have received this packet due to a broadcast from the host, in that
// case just ignore it.
ASSERT_MSG(packet.destination_address == Network::BroadcastMac ||
connection_status.status == static_cast<u32>(NetworkStatus::ConnectedAsHost),
"Can't be a router if we're not a host");
if (connection_status.status == static_cast<u32>(NetworkStatus::ConnectedAsHost) &&
secure_data.dest_node_id != BroadcastNetworkNodeId) {
// Broadcast the packet so the right receiver can get it.
// TODO(B3N30): Is there a flag that makes this kind of routing be unicast instead of
// multicast? Perhaps this is a way to allow spectators to see some of the packets.
Network::WifiPacket out_packet = packet;
out_packet.destination_address = Network::BroadcastMac;
SendPacket(out_packet);
}
return;
}
// The packet is addressed to us (or to everyone using the broadcast node id), handle it.
// TODO(B3N30): We don't currently send nor handle management frames.
ASSERT(!secure_data.is_management);
// TODO(B3N30): Allow more than one bind node per channel.
auto channel_info = channel_data.find(secure_data.data_channel);
// Ignore packets from channels we're not interested in.
if (channel_info == channel_data.end())
return;
if (channel_info->second.network_node_id != BroadcastNetworkNodeId &&
channel_info->second.network_node_id != secure_data.src_node_id)
return;
// Add the received packet to the data queue.
channel_info->second.received_packets.emplace_back(packet.data);
// Signal the data event. We can do this directly because we locked g_hle_lock
channel_info->second.event->Signal();
}
/*
* Start a connection sequence with an UDS server. The sequence starts by sending an 802.11
* authentication frame with SEQ1.
@ -251,7 +325,7 @@ void StartConnectionSequence(const MacAddress& server) {
WifiPacket auth_request;
{
std::lock_guard<std::mutex> lock(connection_status_mutex);
ASSERT(connection_status.status == static_cast<u32>(NetworkStatus::NotConnected));
connection_status.status = static_cast<u32>(NetworkStatus::Connecting);
// TODO(Subv): Handle timeout.
@ -329,7 +403,7 @@ static void HandleDataFrame(const Network::WifiPacket& packet) {
HandleEAPoLPacket(packet);
break;
case EtherType::SecureData:
// TODO(B3N30): Handle SecureData packets
HandleSecureDataPacket(packet);
break;
}
}
@ -482,6 +556,8 @@ static void InitializeWithVersion(Interface* self) {
recv_buffer_memory = Kernel::g_handle_table.Get<Kernel::SharedMemory>(sharedmem_handle);
initialized = true;
ASSERT_MSG(recv_buffer_memory->size == sharedmem_size, "Invalid shared memory size.");
{
@ -535,6 +611,48 @@ static void GetConnectionStatus(Interface* self) {
LOG_DEBUG(Service_NWM, "called");
}
/**
* NWM_UDS::GetNodeInformation service function.
* Returns the node inforamtion structure for the currently connected node.
* Inputs:
* 0 : Command header.
* 1 : Node ID.
* Outputs:
* 0 : Return header
* 1 : Result of function, 0 on success, otherwise error code
* 2-11 : NodeInfo structure.
*/
static void GetNodeInformation(Interface* self) {
IPC::RequestParser rp(Kernel::GetCommandBuffer(), 0xD, 1, 0);
u16 network_node_id = rp.Pop<u16>();
if (!initialized) {
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(ResultCode(ErrorDescription::NotInitialized, ErrorModule::UDS,
ErrorSummary::StatusChanged, ErrorLevel::Status));
return;
}
{
std::lock_guard<std::mutex> lock(connection_status_mutex);
auto itr = std::find_if(node_info.begin(), node_info.end(),
[network_node_id](const NodeInfo& node) {
return node.network_node_id == network_node_id;
});
if (itr == node_info.end()) {
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(ResultCode(ErrorDescription::NotFound, ErrorModule::UDS,
ErrorSummary::WrongArgument, ErrorLevel::Status));
return;
}
IPC::RequestBuilder rb = rp.MakeBuilder(11, 0);
rb.Push(RESULT_SUCCESS);
rb.PushRaw<NodeInfo>(*itr);
}
LOG_DEBUG(Service_NWM, "called");
}
/**
* NWM_UDS::Bind service function.
* Binds a BindNodeId to a data channel and retrieves a data event.
@ -557,29 +675,85 @@ static void Bind(Interface* self) {
u8 data_channel = rp.Pop<u8>();
u16 network_node_id = rp.Pop<u16>();
// TODO(Subv): Store the data channel and verify it when receiving data frames.
LOG_DEBUG(Service_NWM, "called");
if (data_channel == 0) {
if (data_channel == 0 || bind_node_id == 0) {
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(ResultCode(ErrorDescription::NotAuthorized, ErrorModule::UDS,
ErrorSummary::WrongArgument, ErrorLevel::Usage));
return;
}
constexpr size_t MaxBindNodes = 16;
if (channel_data.size() >= MaxBindNodes) {
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(ResultCode(ErrorDescription::OutOfMemory, ErrorModule::UDS,
ErrorSummary::OutOfResource, ErrorLevel::Status));
return;
}
constexpr u32 MinRecvBufferSize = 0x5F4;
if (recv_buffer_size < MinRecvBufferSize) {
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(ResultCode(ErrorDescription::TooLarge, ErrorModule::UDS,
ErrorSummary::WrongArgument, ErrorLevel::Usage));
return;
}
// Create a new event for this bind node.
// TODO(Subv): Signal this event when new data is received on this data channel.
auto event = Kernel::Event::Create(Kernel::ResetType::OneShot,
"NWM::BindNodeEvent" + std::to_string(bind_node_id));
bind_node_events[bind_node_id] = event;
std::lock_guard<std::mutex> lock(connection_status_mutex);
ASSERT(channel_data.find(data_channel) == channel_data.end());
// TODO(B3N30): Support more than one bind node per channel.
channel_data[data_channel] = {bind_node_id, data_channel, network_node_id, event};
IPC::RequestBuilder rb = rp.MakeBuilder(1, 2);
rb.Push(RESULT_SUCCESS);
rb.PushCopyHandles(Kernel::g_handle_table.Create(event).Unwrap());
}
/**
* NWM_UDS::Unbind service function.
* Unbinds a BindNodeId from a data channel.
* Inputs:
* 1 : BindNodeId
* Outputs:
* 0 : Return header
* 1 : Result of function, 0 on success, otherwise error code
*/
static void Unbind(Interface* self) {
IPC::RequestParser rp(Kernel::GetCommandBuffer(), 0x12, 1, 0);
u32 bind_node_id = rp.Pop<u32>();
if (bind_node_id == 0) {
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(ResultCode(ErrorDescription::NotAuthorized, ErrorModule::UDS,
ErrorSummary::WrongArgument, ErrorLevel::Usage));
return;
}
std::lock_guard<std::mutex> lock(connection_status_mutex);
auto itr =
std::find_if(channel_data.begin(), channel_data.end(), [bind_node_id](const auto& data) {
return data.second.bind_node_id == bind_node_id;
});
if (itr != channel_data.end()) {
channel_data.erase(itr);
}
IPC::RequestBuilder rb = rp.MakeBuilder(5, 0);
rb.Push(RESULT_SUCCESS);
rb.Push(bind_node_id);
// TODO(B3N30): Find out what the other return values are
rb.Push<u32>(0);
rb.Push<u32>(0);
rb.Push<u32>(0);
}
/**
* NWM_UDS::BeginHostingNetwork service function.
* Creates a network and starts broadcasting its presence.
@ -606,13 +780,14 @@ static void BeginHostingNetwork(Interface* self) {
LOG_DEBUG(Service_NWM, "called");
{
std::lock_guard<std::mutex> lock(connection_status_mutex);
Memory::ReadBlock(network_info_address, &network_info, sizeof(NetworkInfo));
// 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.");
{
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.
@ -626,11 +801,13 @@ static void BeginHostingNetwork(Interface* self) {
connection_status.max_nodes = network_info.max_nodes;
// Resize the nodes list to hold max_nodes.
node_info.clear();
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;
@ -639,12 +816,22 @@ static void BeginHostingNetwork(Interface* self) {
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 (auto room_member = Network::GetRoomMember().lock()) {
if (room_member->IsConnected()) {
network_info.host_mac_address = room_member->GetMacAddress();
} else {
network_info.host_mac_address = {{0x0, 0x0, 0x0, 0x0, 0x0, 0x0}};
}
}
node_info[0] = current_node;
// If the game has a preferred channel, use that instead.
if (network_info.channel != 0)
network_channel = network_info.channel;
else
network_info.channel = DefaultNetworkChannel;
}
connection_status_event->Signal();
@ -652,8 +839,7 @@ static void BeginHostingNetwork(Interface* self) {
CoreTiming::ScheduleEvent(msToCycles(DefaultBeaconInterval * MillisecondsPerTU),
beacon_broadcast_event, 0);
LOG_WARNING(Service_NWM,
"An UDS network has been created, but broadcasting it is unimplemented.");
LOG_DEBUG(Service_NWM, "An UDS network has been created.");
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(RESULT_SUCCESS);
@ -722,13 +908,10 @@ static void SendTo(Interface* self) {
size_t desc_size;
const VAddr input_address = rp.PopStaticBuffer(&desc_size, false);
ASSERT(desc_size == data_size);
ASSERT(desc_size >= data_size);
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
u16 network_node_id;
{
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)) {
@ -743,10 +926,7 @@ static void SendTo(Interface* self) {
return;
}
network_node_id = connection_status.network_node_id;
}
// TODO(Subv): Do something with the flags.
// TODO(B3N30): Do something with the flags.
constexpr size_t MaxSize = 0x5C6;
if (data_size > MaxSize) {
@ -758,20 +938,116 @@ static void SendTo(Interface* self) {
std::vector<u8> data(data_size);
Memory::ReadBlock(input_address, data.data(), data.size());
// TODO(Subv): Increment the sequence number after each sent packet.
// TODO(B3N30): Increment the sequence number after each sent packet.
u16 sequence_number = 0;
std::vector<u8> data_payload =
GenerateDataPayload(data, data_channel, dest_node_id, network_node_id, sequence_number);
std::vector<u8> data_payload = GenerateDataPayload(
data, data_channel, dest_node_id, connection_status.network_node_id, sequence_number);
// TODO(Subv): Retrieve the MAC address of the dest_node_id and our own to encrypt
// TODO(B3N30): Retrieve the MAC address of the dest_node_id and our own to encrypt
// and encapsulate the payload.
// TODO(Subv): Send the frame.
Network::WifiPacket packet;
// Data frames are sent to the host, who then decides where to route it to. If we're the host,
// just directly broadcast the frame.
if (connection_status.status == static_cast<u32>(NetworkStatus::ConnectedAsHost))
packet.destination_address = Network::BroadcastMac;
else
packet.destination_address = network_info.host_mac_address;
packet.channel = network_channel;
packet.data = std::move(data_payload);
packet.type = Network::WifiPacket::PacketType::Data;
SendPacket(packet);
rb.Push(RESULT_SUCCESS);
}
LOG_WARNING(Service_NWM, "(STUB) called dest_node_id=%u size=%u flags=%u channel=%u",
static_cast<u32>(dest_node_id), data_size, flags, static_cast<u32>(data_channel));
/**
* NWM_UDS::PullPacket service function.
* Receives a data frame from the specified bind node id
* Inputs:
* 0 : Command header.
* 1 : Bind node id.
* 2 : Max out buff size >> 2.
* 3 : Max out buff size.
* 64 : Output buffer descriptor
* 65 : Output buffer address
* Outputs:
* 0 : Return header
* 1 : Result of function, 0 on success, otherwise error code
* 2 : Received data size
* 3 : u16 Source network node id
* 4 : Buffer descriptor
* 5 : Buffer address
*/
static void PullPacket(Interface* self) {
IPC::RequestParser rp(Kernel::GetCommandBuffer(), 0x14, 3, 0);
u32 bind_node_id = rp.Pop<u32>();
u32 max_out_buff_size_aligned = rp.Pop<u32>();
u32 max_out_buff_size = rp.Pop<u32>();
size_t desc_size;
const VAddr output_address = rp.PeekStaticBuffer(0, &desc_size);
ASSERT(desc_size == max_out_buff_size);
std::lock_guard<std::mutex> lock(connection_status_mutex);
if (connection_status.status != static_cast<u32>(NetworkStatus::ConnectedAsHost) &&
connection_status.status != static_cast<u32>(NetworkStatus::ConnectedAsClient) &&
connection_status.status != static_cast<u32>(NetworkStatus::ConnectedAsSpectator)) {
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(ResultCode(ErrorDescription::NotAuthorized, ErrorModule::UDS,
ErrorSummary::InvalidState, ErrorLevel::Status));
return;
}
auto channel =
std::find_if(channel_data.begin(), channel_data.end(), [bind_node_id](const auto& data) {
return data.second.bind_node_id == bind_node_id;
});
if (channel == channel_data.end()) {
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(ResultCode(ErrorDescription::NotAuthorized, ErrorModule::UDS,
ErrorSummary::WrongArgument, ErrorLevel::Usage));
return;
}
if (channel->second.received_packets.empty()) {
Memory::ZeroBlock(output_address, desc_size);
IPC::RequestBuilder rb = rp.MakeBuilder(3, 2);
rb.Push(RESULT_SUCCESS);
rb.Push<u32>(0);
rb.Push<u16>(0);
rb.PushStaticBuffer(output_address, desc_size, 0);
return;
}
const auto& next_packet = channel->second.received_packets.front();
auto secure_data = ParseSecureDataHeader(next_packet);
auto data_size = secure_data.GetActualDataSize();
if (data_size > max_out_buff_size) {
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(ResultCode(ErrorDescription::TooLarge, ErrorModule::UDS,
ErrorSummary::WrongArgument, ErrorLevel::Usage));
return;
}
IPC::RequestBuilder rb = rp.MakeBuilder(3, 2);
Memory::ZeroBlock(output_address, desc_size);
// Write the actual data.
Memory::WriteBlock(output_address,
next_packet.data() + sizeof(LLCHeader) + sizeof(SecureDataHeader),
data_size);
rb.Push(RESULT_SUCCESS);
rb.Push<u32>(data_size);
rb.Push<u16>(secure_data.src_node_id);
rb.PushStaticBuffer(output_address, desc_size, 0);
channel->second.received_packets.pop_front();
}
/**
@ -986,14 +1262,14 @@ const Interface::FunctionInfo FunctionTable[] = {
{0x00090442, nullptr, "ConnectNetwork (deprecated)"},
{0x000A0000, nullptr, "DisconnectNetwork"},
{0x000B0000, GetConnectionStatus, "GetConnectionStatus"},
{0x000D0040, nullptr, "GetNodeInformation"},
{0x000D0040, GetNodeInformation, "GetNodeInformation"},
{0x000E0006, nullptr, "DecryptBeaconData (deprecated)"},
{0x000F0404, RecvBeaconBroadcastData, "RecvBeaconBroadcastData"},
{0x00100042, SetApplicationData, "SetApplicationData"},
{0x00110040, nullptr, "GetApplicationData"},
{0x00120100, Bind, "Bind"},
{0x00130040, nullptr, "Unbind"},
{0x001400C0, nullptr, "PullPacket"},
{0x00130040, Unbind, "Unbind"},
{0x001400C0, PullPacket, "PullPacket"},
{0x00150080, nullptr, "SetMaxSendDelay"},
{0x00170182, SendTo, "SendTo"},
{0x001A0000, GetChannel, "GetChannel"},
@ -1018,9 +1294,10 @@ NWM_UDS::NWM_UDS() {
NWM_UDS::~NWM_UDS() {
network_info = {};
bind_node_events.clear();
channel_data.clear();
connection_status_event = nullptr;
recv_buffer_memory = nullptr;
initialized = false;
{
std::lock_guard<std::mutex> lock(connection_status_mutex);

9
src/core/hle/service/nwm/uds_data.cpp
View file

@ -279,6 +279,15 @@ std::vector<u8> GenerateDataPayload(const std::vector<u8>& data, u8 channel, u16
return buffer;
}
SecureDataHeader ParseSecureDataHeader(const std::vector<u8>& data) {
SecureDataHeader header;
// Skip the LLC header
std::memcpy(&header, data.data() + sizeof(LLCHeader), sizeof(header));
return header;
}
std::vector<u8> GenerateEAPoLStartFrame(u16 association_id, const NodeInfo& node_info) {
EAPoLStartPacket eapol_start{};
eapol_start.association_id = association_id;

9
src/core/hle/service/nwm/uds_data.h
View file

@ -51,6 +51,10 @@ struct SecureDataHeader {
u16_be sequence_number;
u16_be dest_node_id;
u16_be src_node_id;
u32 GetActualDataSize() const {
return protocol_size - sizeof(SecureDataHeader);
}
};
static_assert(sizeof(SecureDataHeader) == 14, "SecureDataHeader has the wrong size");
@ -118,6 +122,11 @@ static_assert(sizeof(EAPoLLogoffPacket) == 0x298, "EAPoLLogoffPacket has the wro
std::vector<u8> GenerateDataPayload(const std::vector<u8>& data, u8 channel, u16 dest_node,
u16 src_node, u16 sequence_number);
/*
* Returns the SecureDataHeader stored in an 802.11 data frame.
*/
SecureDataHeader ParseSecureDataHeader(const std::vector<u8>& data);
/*
* Generates an unencrypted 802.11 data frame body with the EAPoL-Start format for UDS
* communication.