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Service/UDS: Implement SendTo, PullPacket, HandleSecureData, and Bind

This commit is contained in:
B3n30 2017-10-04 08:07:32 +02:00
parent 30fabc41c6
commit 230ea063a5
4 changed files with 202 additions and 40 deletions
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199
src/core/hle/service/nwm/nwm_uds.cpp
View File

@ -47,8 +47,17 @@ 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 +84,9 @@ 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.
*/
@ -143,7 +155,7 @@ void HandleAssociationResponseFrame(const Network::WifiPacket& packet) {
"Could not join network");
{
std::lock_guard<std::mutex> lock(connection_status_mutex);
ASSERT(connection_status.status == static_cast<u32>(NetworkStatus::Connecting));
ASSERT(connection_status.status == static_cast<u32>(NetworkStatus::NotConnected));
}
// Send the EAPoL-Start packet to the server.
@ -159,6 +171,7 @@ void HandleAssociationResponseFrame(const Network::WifiPacket& packet) {
}
static void HandleEAPoLPacket(const Network::WifiPacket& packet) {
std::lock_guard<std::recursive_mutex> hle_lock(HLE::g_hle_lock);
std::lock_guard<std::mutex> lock(connection_status_mutex);
if (GetEAPoLFrameType(packet.data) == EAPoLStartMagic) {
@ -205,7 +218,6 @@ 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)) {
@ -242,6 +254,58 @@ static void HandleEAPoLPacket(const Network::WifiPacket& packet) {
}
}
static void HandleSecureDataPacket(const Network::WifiPacket& packet) {
auto secure_data = ParseSecureDataHeader(packet.data);
std::lock_guard<std::recursive_mutex> hle_lock(HLE::g_hle_lock);
std::lock_guard<std::mutex> lock(connection_status_mutex);
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.
@ -329,7 +393,7 @@ static void HandleDataFrame(const Network::WifiPacket& packet) {
HandleEAPoLPacket(packet);
break;
case EtherType::SecureData:
// TODO(B3N30): Handle SecureData packets
HandleSecureDataPacket(packet);
break;
}
}
@ -557,8 +621,6 @@ 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) {
@ -569,13 +631,15 @@ static void Bind(Interface* self) {
}
// 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());
}
@ -722,13 +786,10 @@ 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 +804,7 @@ 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 +816,107 @@ 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);
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);
// TODO(B3N30): Find the right error code
rb.Push<u32>(-1);
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<u32>(0xE10113E9);
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();
}
/**
@ -993,7 +1138,7 @@ const Interface::FunctionInfo FunctionTable[] = {
{0x00110040, nullptr, "GetApplicationData"},
{0x00120100, Bind, "Bind"},
{0x00130040, nullptr, "Unbind"},
{0x001400C0, nullptr, "PullPacket"},
{0x001400C0, PullPacket, "PullPacket"},
{0x00150080, nullptr, "SetMaxSendDelay"},
{0x00170182, SendTo, "SendTo"},
{0x001A0000, GetChannel, "GetChannel"},
@ -1018,7 +1163,7 @@ 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;

1
src/core/hle/service/nwm/nwm_uds.h
View File

@ -42,7 +42,6 @@ using NodeList = std::vector<NodeInfo>;
enum class NetworkStatus {
NotConnected = 3,
ConnectedAsHost = 6,
Connecting = 7,
ConnectedAsClient = 9,
ConnectedAsSpectator = 10,
};

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

@ -275,6 +275,15 @@ 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() {
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.