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Add filter to PacketHandling; Fix some issues with Disconnect

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This commit is contained in:
B3n30 2018-10-03 14:01:24 +02:00
parent 874a95cea7
commit 7e7f17c78d
2 changed files with 84 additions and 17 deletions
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95
src/core/hle/service/nwm/nwm_uds.cpp
View File

@ -79,7 +79,11 @@ static u8 network_channel = DefaultNetworkChannel;
static NetworkInfo network_info;
// Mapping of mac addresses to their respective node_ids.
static std::map<MacAddress, u16> node_map;
struct Node {
bool connected;
u16 node_id;
};
static std::map<MacAddress, Node> node_map;
// Event that will generate and send the 802.11 beacon frames.
static CoreTiming::EventType* beacon_broadcast_event;
@ -165,10 +169,12 @@ static void BroadcastNodeMap() {
std::memcpy(packet.data.data(), &size, sizeof(size));
std::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(node.first) + sizeof(node.second);
if (node.second.connected) {
std::memcpy(packet.data.data() + offset, node.first.data(), sizeof(node.first));
std::memcpy(packet.data.data() + offset + sizeof(node.first), &node.second.node_id,
sizeof(node.second.node_id));
offset += sizeof(node.first) + sizeof(node.second.node_id);
}
}
SendPacket(packet);
@ -176,6 +182,11 @@ static void BroadcastNodeMap() {
static void HandleNodeMapPacket(const Network::WifiPacket& packet) {
std::lock_guard<std::mutex> lock(connection_status_mutex);
if (connection_status.status == static_cast<u32>(NetworkStatus::ConnectedAsHost)) {
LOG_DEBUG(Service_NWM, "Ignored NodeMapPacket since connection_status is host");
return;
}
node_map.clear();
std::size_t num_entries;
Network::MacAddress address;
@ -185,7 +196,8 @@ static void HandleNodeMapPacket(const Network::WifiPacket& packet) {
for (std::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;
node_map[address].connected = true;
node_map[address].node_id = id;
offset += sizeof(address) + sizeof(id);
}
}
@ -218,7 +230,12 @@ 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));
if (connection_status.status != static_cast<u32>(NetworkStatus::Connecting)) {
LOG_DEBUG(Service_NWM,
"Ignored AssociationResponseFrame because connection status is {}",
connection_status.status);
return;
}
}
// Send the EAPoL-Start packet to the server.
@ -245,14 +262,21 @@ static void HandleEAPoLPacket(const Network::WifiPacket& packet) {
return;
}
auto node = DeserializeNodeInfoFromFrame(packet.data);
if (connection_status.max_nodes == connection_status.total_nodes) {
// Reject connection attempt
LOG_ERROR(Service_NWM, "Reached maximum nodes, but reject packet wasn't sent.");
// TODO(B3N30): Figure out what packet is sent here
auto node_it = node_map.find(packet.transmitter_address);
if (node_it == node_map.end()) {
LOG_DEBUG(Service_NWM, "Connection sequence aborted, because the AuthenticationFrame "
"of the client wasn't recieved");
return;
}
if (node_it->second.connected) {
LOG_DEBUG(Service_NWM,
"Connection sequence aborted, because the client is already connected");
return;
}
ASSERT(connection_status.max_nodes != connection_status.total_nodes);
auto node = DeserializeNodeInfoFromFrame(packet.data);
// Get an unused network node id
u16 node_id = GetNextAvailableNodeId();
@ -268,7 +292,8 @@ static void HandleEAPoLPacket(const Network::WifiPacket& packet) {
network_info.total_nodes++;
node_map[packet.transmitter_address] = node.network_node_id;
node_map[packet.transmitter_address].node_id = node.network_node_id;
node_map[packet.transmitter_address].connected = true;
BroadcastNodeMap();
@ -321,6 +346,7 @@ static void HandleEAPoLPacket(const Network::WifiPacket& packet) {
connection_status_event->Signal();
connection_event->Signal();
} else if (connection_status.status == static_cast<u32>(NetworkStatus::ConnectedAsClient)) {
// TODO(B3N30): Remove that section and send/receive a proper connection_status packet
// On a 3ds this packet wouldn't be addressed to already connected clients
// We use this information because in the current implementation the host
// isn't broadcasting the node information
@ -349,6 +375,14 @@ static void HandleSecureDataPacket(const Network::WifiPacket& packet) {
std::unique_lock<std::mutex> lock(connection_status_mutex, std::defer_lock);
std::lock(hle_lock, lock);
if (connection_status.status != static_cast<u32>(NetworkStatus::ConnectedAsHost) &&
connection_status.status != static_cast<u32>(NetworkStatus::ConnectedAsClient)) {
// TODO(B3N30): Handle spectators
LOG_DEBUG(Service_NWM, "Ignored SecureDataPacket, because connection status is {}",
connection_status.status);
return;
}
if (secure_data.src_node_id == connection_status.network_node_id) {
// Ignore packets that came from ourselves.
return;
@ -464,12 +498,24 @@ void HandleAuthenticationFrame(const Network::WifiPacket& packet) {
connection_status.status);
return;
}
if (node_map.find(packet.transmitter_address) != node_map.end()) {
LOG_ERROR(Service_NWM, "Connection sequence aborted, because there is already a "
"connected client with that MAC-Adress");
return;
}
if (connection_status.max_nodes == connection_status.total_nodes) {
// Reject connection attempt
LOG_ERROR(Service_NWM, "Reached maximum nodes, but reject packet wasn't sent.");
// TODO(B3N30): Figure out what packet is sent here
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;
node_map[packet.transmitter_address].connected = false;
}
SendPacket(auth_request);
@ -492,7 +538,15 @@ void HandleDeauthenticationFrame(const Network::WifiPacket& packet) {
return;
}
u16 node_id = node_map[packet.transmitter_address];
s32 node_id = node_map[packet.transmitter_address].node_id;
bool connected = node_map[packet.transmitter_address].connected;
node_map.erase(packet.transmitter_address);
if (!connected) {
LOG_DEBUG(Service_NWM, "Received DeauthenticationFrame from a not connected MAC Address");
return;
}
auto node = std::find_if(node_info.begin(), node_info.end(), [&node_id](const NodeInfo& info) {
return info.network_node_id == node_id;
});
@ -501,8 +555,13 @@ void HandleDeauthenticationFrame(const Network::WifiPacket& packet) {
connection_status.node_bitmask &= ~(1 << (node_id - 1));
connection_status.changed_nodes |= 1 << (node_id - 1);
connection_status.total_nodes--;
connection_status.nodes[node_id - 1] = 0;
network_info.total_nodes--;
// TODO(B3N30): broadcast new connection_status to clients
node->Reset();
connection_status_event->Signal();
}
@ -656,6 +715,7 @@ void NWM_UDS::InitializeWithVersion(Kernel::HLERequestContext& ctx) {
connection_status.status = static_cast<u32>(NetworkStatus::NotConnected);
node_info.clear();
node_info.push_back(current_node);
channel_data.clear();
}
IPC::RequestBuilder rb = rp.MakeBuilder(1, 2);
@ -1012,8 +1072,9 @@ void NWM_UDS::SendTo(Kernel::HLERequestContext& ctx) {
} 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; });
std::find_if(node_map.begin(), node_map.end(), [dest_node_id](const auto& node) {
return node.second.node_id == dest_node_id && node.second.connected;
});
if (destination == node_map.end()) {
LOG_ERROR(Service_NWM, "tried to send packet to unknown dest id {}", dest_node_id);
rb.Push(ResultCode(ErrorDescription::NotFound, ErrorModule::UDS,

6
src/core/hle/service/nwm/nwm_uds.h
View File

@ -32,6 +32,12 @@ struct NodeInfo {
INSERT_PADDING_BYTES(4);
u16_le network_node_id;
INSERT_PADDING_BYTES(6);
void Reset() {
friend_code_seed = 0;
username.fill(0);
network_node_id = 0;
}
};
static_assert(sizeof(NodeInfo) == 40, "NodeInfo has incorrect size.");