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NWM_UDS:: Check flags in SendTo (#3481) 

* NWM_UDS:: Check flags in SendTo

* NWM_UDS: SendTo from Host to only oneClient

* fix u8 in flags

* Send node_map to clients

* Libnetwork: Increase libnetwork version

* Broadcast on dest_node_id 0xFFFF

* fixup: dest_node_id offset

* fixup: dest_node_id offset part 2

* Adressed wwyleles feedback

* Adressed wwylele's nits
This commit is contained in:
Ben 2018-03-27 14:01:29 +02:00 committed by Weiyi Wang
parent 05cf7fe70a
commit 4be12d5f56
3 changed files with 92 additions and 21 deletions
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108
src/core/hle/service/nwm/nwm_uds.cpp
View File

@ -144,13 +144,50 @@ void SendPacket(Network::WifiPacket& packet) {
static u16 GetNextAvailableNodeId() {
for (u16 index = 0; index < connection_status.max_nodes; ++index) {
if ((connection_status.node_bitmask & (1 << index)) == 0)
return index;
return index + 1;
}
// Any connection attempts to an already full network should have been refused.
ASSERT_MSG(false, "No available connection slots in the network");
}
static void BroadcastNodeMap() {
// Note: This is not how UDS on a 3ds does it but it shouldn't be
// necessary for citra
Network::WifiPacket packet;
packet.channel = network_channel;
packet.type = Network::WifiPacket::PacketType::NodeMap;
packet.destination_address = Network::BroadcastMac;
size_t size = node_map.size();
packet.data.resize(sizeof(size) + (sizeof(Network::MacAddress) + sizeof(u32)) * size);
std::memcpy(packet.data.data(), &size, sizeof(size));
size_t offset = sizeof(size);
for (const auto& node : node_map) {
std::memcpy(packet.data.data() + offset, node.first.data(), sizeof(node.first));
std::memcpy(packet.data.data() + offset + sizeof(node.first), &node.second,
sizeof(node.second));
offset += sizeof(Network::MacAddress) + sizeof(u32);
}
SendPacket(packet);
}
static void HandleNodeMapPacket(const Network::WifiPacket& packet) {
std::lock_guard<std::mutex> lock(connection_status_mutex);
node_map.clear();
size_t num_entries;
Network::MacAddress address;
u32 id;
std::memcpy(&num_entries, packet.data.data(), sizeof(num_entries));
size_t offset = sizeof(num_entries);
for (size_t i = 0; i < num_entries; ++i) {
std::memcpy(&address, packet.data.data() + offset, sizeof(address));
std::memcpy(&id, packet.data.data() + offset + sizeof(address), sizeof(id));
node_map[address] = id;
offset += sizeof(address) + sizeof(id);
}
}
// 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) {
@ -217,11 +254,11 @@ static void HandleEAPoLPacket(const Network::WifiPacket& packet) {
// Get an unused network node id
u16 node_id = GetNextAvailableNodeId();
node.network_node_id = node_id + 1;
node.network_node_id = node_id;
connection_status.node_bitmask |= 1 << node_id;
connection_status.changed_nodes |= 1 << node_id;
connection_status.nodes[node_id] = node.network_node_id;
connection_status.node_bitmask |= 1 << (node_id - 1);
connection_status.changed_nodes |= 1 << (node_id - 1);
connection_status.nodes[node_id - 1] = node.network_node_id;
connection_status.total_nodes++;
u8 current_nodes = network_info.total_nodes;
@ -229,7 +266,9 @@ static void HandleEAPoLPacket(const Network::WifiPacket& packet) {
network_info.total_nodes++;
node_map[packet.transmitter_address] = node_id;
node_map[packet.transmitter_address] = node.network_node_id;
BroadcastNodeMap();
// Send the EAPoL-Logoff packet.
using Network::WifiPacket;
@ -243,8 +282,7 @@ static void HandleEAPoLPacket(const Network::WifiPacket& packet) {
eapol_logoff.type = WifiPacket::PacketType::Data;
SendPacket(eapol_logoff);
// TODO(B3N30): Broadcast updated node list
// The 3ds does this presumably to support spectators.
connection_status_event->Signal();
} else {
if (connection_status.status != static_cast<u32>(NetworkStatus::Connecting)) {
@ -433,12 +471,12 @@ void HandleDeauthenticationFrame(const Network::WifiPacket& packet) {
u16 node_id = node_map[packet.transmitter_address];
auto node = std::find_if(node_info.begin(), node_info.end(), [&node_id](const NodeInfo& info) {
return info.network_node_id == node_id + 1;
return info.network_node_id == node_id;
});
ASSERT(node != node_info.end());
connection_status.node_bitmask &= ~(1 << node_id);
connection_status.changed_nodes |= 1 << node_id;
connection_status.node_bitmask &= ~(1 << (node_id - 1));
connection_status.changed_nodes |= 1 << (node_id - 1);
connection_status.total_nodes--;
network_info.total_nodes--;
@ -474,6 +512,9 @@ void OnWifiPacketReceived(const Network::WifiPacket& packet) {
case Network::WifiPacket::PacketType::Deauthentication:
HandleDeauthenticationFrame(packet);
break;
case Network::WifiPacket::PacketType::NodeMap:
HandleNodeMapPacket(packet);
break;
}
}
@ -487,6 +528,7 @@ void NWM_UDS::Shutdown(Kernel::HLERequestContext& ctx) {
bind_node.second.event->Signal();
}
channel_data.clear();
node_map.clear();
recv_buffer_memory.reset();
@ -813,6 +855,7 @@ void NWM_UDS::BeginHostingNetwork(Kernel::HLERequestContext& ctx) {
void NWM_UDS::UpdateNetworkAttribute(Kernel::HLERequestContext& ctx) {
IPC::RequestParser rp(ctx, 0x07, 2, 0);
rp.Skip(2, false);
LOG_WARNING(Service_NWM, "stubbed");
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
rb.Push(RESULT_SUCCESS);
}
@ -839,6 +882,7 @@ void NWM_UDS::DestroyNetwork(Kernel::HLERequestContext& ctx) {
connection_status = {};
connection_status.status = static_cast<u32>(NetworkStatus::NotConnected);
connection_status.network_node_id = tmp_node_id;
node_map.clear();
connection_status_event->Signal();
IPC::RequestBuilder rb = rp.MakeBuilder(1, 0);
@ -867,6 +911,7 @@ void NWM_UDS::DisconnectNetwork(Kernel::HLERequestContext& ctx) {
connection_status = {};
connection_status.status = static_cast<u32>(NetworkStatus::ConnectedAsHost);
connection_status.network_node_id = tmp_node_id;
node_map.clear();
LOG_DEBUG(Service_NWM, "called as a host");
rb.Push(ResultCode(ErrCodes::WrongStatus, ErrorModule::UDS, ErrorSummary::InvalidState,
ErrorLevel::Status));
@ -876,6 +921,7 @@ void NWM_UDS::DisconnectNetwork(Kernel::HLERequestContext& ctx) {
connection_status = {};
connection_status.status = static_cast<u32>(NetworkStatus::NotConnected);
connection_status.network_node_id = tmp_node_id;
node_map.clear();
connection_status_event->Signal();
deauth.channel = network_channel;
@ -904,7 +950,10 @@ void NWM_UDS::SendTo(Kernel::HLERequestContext& ctx) {
u8 data_channel = rp.Pop<u8>();
rp.Skip(1, false);
u32 data_size = rp.Pop<u32>();
u32 flags = rp.Pop<u32>();
u8 flags = rp.Pop<u8>();
// There should never be a dest_node_id of 0
ASSERT(dest_node_id != 0);
std::vector<u8> input_buffer = rp.PopStaticBuffer();
ASSERT(input_buffer.size() >= data_size);
@ -921,12 +970,37 @@ void NWM_UDS::SendTo(Kernel::HLERequestContext& ctx) {
}
if (dest_node_id == connection_status.network_node_id) {
LOG_ERROR(Service_NWM, "tried to send packet to itself");
rb.Push(ResultCode(ErrorDescription::NotFound, ErrorModule::UDS,
ErrorSummary::WrongArgument, ErrorLevel::Status));
return;
}
// TODO(B3N30): Do something with the flags.
Network::MacAddress dest_address;
if (flags >> 2) {
LOG_ERROR(Service_NWM, "Unexpected flags 0x%02X", flags);
}
if ((flags & (0x1 << 1)) || dest_node_id == 0xFFFF) {
// Broadcast
dest_address = Network::BroadcastMac;
} else if (dest_node_id != 1) {
// Send to specific client
auto destination =
std::find_if(node_map.begin(), node_map.end(),
[dest_node_id](const auto& node) { return node.second == dest_node_id; });
if (destination == node_map.end()) {
LOG_ERROR(Service_NWM, "tried to send packet to unknown dest id %u", dest_node_id);
rb.Push(ResultCode(ErrorDescription::NotFound, ErrorModule::UDS,
ErrorSummary::WrongArgument, ErrorLevel::Status));
return;
}
dest_address = destination->first;
} else {
// Send message to host
dest_address = network_info.host_mac_address;
}
constexpr size_t MaxSize = 0x5C6;
if (data_size > MaxSize) {
@ -945,12 +1019,8 @@ void NWM_UDS::SendTo(Kernel::HLERequestContext& ctx) {
// and encapsulate the payload.
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.destination_address = dest_address;
packet.channel = network_channel;
packet.data = std::move(data_payload);
packet.type = Network::WifiPacket::PacketType::Data;

2
src/network/room.h
View File

@ -12,7 +12,7 @@
namespace Network {
constexpr u32 network_version = 1; ///< The version of this Room and RoomMember
constexpr u32 network_version = 2; ///< The version of this Room and RoomMember
constexpr u16 DefaultRoomPort = 24872;

3
src/network/room_member.h
View File

@ -21,7 +21,8 @@ struct WifiPacket {
Data,
Authentication,
AssociationResponse,
Deauthentication
Deauthentication,
NodeMap
};
PacketType type; ///< The type of 802.11 frame.
std::vector<u8> data; ///< Raw 802.11 frame data, starting at the management frame header