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-rw-r--r--src/core/hle/service/nwm/nwm_uds.cpp121
-rw-r--r--src/core/hle/service/nwm/uds_data.cpp80
-rw-r--r--src/core/hle/service/nwm/uds_data.h68
3 files changed, 250 insertions, 19 deletions
diff --git a/src/core/hle/service/nwm/nwm_uds.cpp b/src/core/hle/service/nwm/nwm_uds.cpp
index 8ef0cda09..0aa63cc1e 100644
--- a/src/core/hle/service/nwm/nwm_uds.cpp
+++ b/src/core/hle/service/nwm/nwm_uds.cpp
@@ -15,6 +15,7 @@
#include "core/hle/ipc_helpers.h"
#include "core/hle/kernel/event.h"
#include "core/hle/kernel/shared_memory.h"
+#include "core/hle/lock.h"
#include "core/hle/result.h"
#include "core/hle/service/nwm/nwm_uds.h"
#include "core/hle/service/nwm/uds_beacon.h"
@@ -100,6 +101,20 @@ void SendPacket(Network::WifiPacket& packet) {
// TODO(Subv): Implement.
}
+/*
+ * Returns an available index in the nodes array for the
+ * currently-hosted UDS network.
+ */
+static u16 GetNextAvailableNodeId() {
+ for (u16 index = 0; index < connection_status.max_nodes; ++index) {
+ if ((connection_status.node_bitmask & (1 << index)) == 0)
+ return index;
+ }
+
+ // Any connection attempts to an already full network should have been refused.
+ ASSERT_MSG(false, "No available connection slots in the network");
+}
+
// 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) {
@@ -143,18 +158,88 @@ void HandleAssociationResponseFrame(const Network::WifiPacket& packet) {
SendPacket(eapol_start);
}
-/*
- * Returns an available index in the nodes array for the
- * currently-hosted UDS network.
- */
-static u16 GetNextAvailableNodeId() {
- for (u16 index = 0; index < connection_status.max_nodes; ++index) {
- if ((connection_status.node_bitmask & (1 << index)) == 0)
- return index;
- }
+static void HandleEAPoLPacket(const Network::WifiPacket& packet) {
+ std::lock_guard<std::mutex> lock(connection_status_mutex);
- // Any connection attempts to an already full network should have been refused.
- ASSERT_MSG(false, "No available connection slots in the network");
+ if (GetEAPoLFrameType(packet.data) == EAPoLStartMagic) {
+ if (connection_status.status != static_cast<u32>(NetworkStatus::ConnectedAsHost)) {
+ LOG_DEBUG(Service_NWM, "Connection sequence aborted, because connection status is %u",
+ connection_status.status);
+ 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
+ return;
+ }
+
+ // Get an unused network node id
+ u16 node_id = GetNextAvailableNodeId();
+ node.network_node_id = node_id + 1;
+
+ 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.total_nodes++;
+
+ u8 current_nodes = network_info.total_nodes;
+ node_info[current_nodes] = node;
+
+ network_info.total_nodes++;
+
+ // Send the EAPoL-Logoff packet.
+ using Network::WifiPacket;
+ WifiPacket eapol_logoff;
+ eapol_logoff.channel = network_channel;
+ eapol_logoff.data =
+ GenerateEAPoLLogoffFrame(packet.transmitter_address, node.network_node_id, node_info,
+ network_info.max_nodes, network_info.total_nodes);
+ // TODO(Subv): Encrypt the packet.
+ eapol_logoff.destination_address = packet.transmitter_address;
+ eapol_logoff.type = WifiPacket::PacketType::Data;
+
+ 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)) {
+ LOG_DEBUG(Service_NWM, "Connection sequence aborted, because connection status is %u",
+ connection_status.status);
+ return;
+ }
+ auto logoff = ParseEAPoLLogoffFrame(packet.data);
+
+ network_info.total_nodes = logoff.connected_nodes;
+ network_info.max_nodes = logoff.max_nodes;
+
+ connection_status.network_node_id = logoff.assigned_node_id;
+ connection_status.total_nodes = logoff.connected_nodes;
+ connection_status.max_nodes = logoff.max_nodes;
+
+ node_info.clear();
+ node_info.reserve(network_info.max_nodes);
+ for (size_t index = 0; index < logoff.connected_nodes; ++index) {
+ connection_status.node_bitmask |= 1 << index;
+ connection_status.changed_nodes |= 1 << index;
+ connection_status.nodes[index] = logoff.nodes[index].network_node_id;
+
+ node_info.emplace_back(DeserializeNodeInfo(logoff.nodes[index]));
+ }
+
+ // We're now connected, signal the application
+ connection_status.status = static_cast<u32>(NetworkStatus::ConnectedAsClient);
+ // 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();
+ }
}
/*
@@ -238,6 +323,17 @@ void HandleAuthenticationFrame(const Network::WifiPacket& packet) {
}
}
+static void HandleDataFrame(const Network::WifiPacket& packet) {
+ switch (GetFrameEtherType(packet.data)) {
+ case EtherType::EAPoL:
+ HandleEAPoLPacket(packet);
+ break;
+ case EtherType::SecureData:
+ // TODO(B3N30): Handle SecureData packets
+ break;
+ }
+}
+
/// Callback to parse and handle a received wifi packet.
void OnWifiPacketReceived(const Network::WifiPacket& packet) {
switch (packet.type) {
@@ -250,6 +346,9 @@ void OnWifiPacketReceived(const Network::WifiPacket& packet) {
case Network::WifiPacket::PacketType::AssociationResponse:
HandleAssociationResponseFrame(packet);
break;
+ case Network::WifiPacket::PacketType::Data:
+ HandleDataFrame(packet);
+ break;
}
}
diff --git a/src/core/hle/service/nwm/uds_data.cpp b/src/core/hle/service/nwm/uds_data.cpp
index 3ef2a84b6..4b389710f 100644
--- a/src/core/hle/service/nwm/uds_data.cpp
+++ b/src/core/hle/service/nwm/uds_data.cpp
@@ -2,6 +2,7 @@
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
+#include <algorithm>
#include <cstring>
#include <cryptopp/aes.h>
#include <cryptopp/ccm.h>
@@ -277,10 +278,10 @@ std::vector<u8> GenerateDataPayload(const std::vector<u8>& data, u8 channel, u16
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;
+ eapol_start.node.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];
+ std::copy(node_info.username.begin(), node_info.username.end(),
+ eapol_start.node.username.begin());
// 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
@@ -295,5 +296,78 @@ std::vector<u8> GenerateEAPoLStartFrame(u16 association_id, const NodeInfo& node
return buffer;
}
+EtherType GetFrameEtherType(const std::vector<u8>& frame) {
+ LLCHeader header;
+ std::memcpy(&header, frame.data(), sizeof(header));
+
+ u16 ethertype = header.protocol;
+ return static_cast<EtherType>(ethertype);
+}
+
+u16 GetEAPoLFrameType(const std::vector<u8>& frame) {
+ // Ignore the LLC header
+ u16_be eapol_type;
+ std::memcpy(&eapol_type, frame.data() + sizeof(LLCHeader), sizeof(eapol_type));
+ return eapol_type;
+}
+
+NodeInfo DeserializeNodeInfoFromFrame(const std::vector<u8>& frame) {
+ EAPoLStartPacket eapol_start;
+
+ // Skip the LLC header
+ std::memcpy(&eapol_start, frame.data() + sizeof(LLCHeader), sizeof(eapol_start));
+
+ NodeInfo node{};
+ node.friend_code_seed = eapol_start.node.friend_code_seed;
+
+ std::copy(eapol_start.node.username.begin(), eapol_start.node.username.end(),
+ node.username.begin());
+
+ return node;
+}
+
+NodeInfo DeserializeNodeInfo(const EAPoLNodeInfo& node) {
+ NodeInfo node_info{};
+ node_info.friend_code_seed = node.friend_code_seed;
+ node_info.network_node_id = node.network_node_id;
+
+ std::copy(node.username.begin(), node.username.end(), node_info.username.begin());
+
+ return node_info;
+}
+
+std::vector<u8> GenerateEAPoLLogoffFrame(const MacAddress& mac_address, u16 network_node_id,
+ const NodeList& nodes, u8 max_nodes, u8 total_nodes) {
+ EAPoLLogoffPacket eapol_logoff{};
+ eapol_logoff.assigned_node_id = network_node_id;
+ eapol_logoff.connected_nodes = total_nodes;
+ eapol_logoff.max_nodes = max_nodes;
+
+ for (size_t index = 0; index < total_nodes; ++index) {
+ const auto& node_info = nodes[index];
+ auto& node = eapol_logoff.nodes[index];
+
+ node.friend_code_seed = node_info.friend_code_seed;
+ node.network_node_id = node_info.network_node_id;
+
+ std::copy(node_info.username.begin(), node_info.username.end(), node.username.begin());
+ }
+
+ std::vector<u8> eapol_buffer(sizeof(EAPoLLogoffPacket));
+ std::memcpy(eapol_buffer.data(), &eapol_logoff, sizeof(eapol_logoff));
+
+ std::vector<u8> buffer = GenerateLLCHeader(EtherType::EAPoL);
+ buffer.insert(buffer.end(), eapol_buffer.begin(), eapol_buffer.end());
+ return buffer;
+}
+
+EAPoLLogoffPacket ParseEAPoLLogoffFrame(const std::vector<u8>& frame) {
+ EAPoLLogoffPacket eapol_logoff;
+
+ // Skip the LLC header
+ std::memcpy(&eapol_logoff, frame.data() + sizeof(LLCHeader), sizeof(eapol_logoff));
+ return eapol_logoff;
+}
+
} // 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 76e8f546b..76bccb1bf 100644
--- a/src/core/hle/service/nwm/uds_data.h
+++ b/src/core/hle/service/nwm/uds_data.h
@@ -8,6 +8,7 @@
#include <vector>
#include "common/common_types.h"
#include "common/swap.h"
+#include "core/hle/service/nwm/uds_beacon.h"
#include "core/hle/service/service.h"
namespace Service {
@@ -67,6 +68,16 @@ struct DataFrameCryptoCTR {
static_assert(sizeof(DataFrameCryptoCTR) == 16, "DataFrameCryptoCTR has the wrong size");
+struct EAPoLNodeInfo {
+ 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(EAPoLNodeInfo) == 0x28, "EAPoLNodeInfo has the wrong size");
+
constexpr u16 EAPoLStartMagic = 0x201;
/*
@@ -78,15 +89,27 @@ struct EAPoLStartPacket {
// This value is hardcoded to 1 in the NWM module.
u16_be unknown = 1;
INSERT_PADDING_BYTES(2);
+ EAPoLNodeInfo node;
+};
- u64_be friend_code_seed;
- std::array<u16_be, 10> username;
- INSERT_PADDING_BYTES(4);
- u16_be network_node_id;
+static_assert(sizeof(EAPoLStartPacket) == 0x30, "EAPoLStartPacket has the wrong size");
+
+constexpr u16 EAPoLLogoffMagic = 0x202;
+
+struct EAPoLLogoffPacket {
+ u16_be magic = EAPoLLogoffMagic;
+ INSERT_PADDING_BYTES(2);
+ u16_be assigned_node_id;
+ MacAddress client_mac_address;
INSERT_PADDING_BYTES(6);
+ u8 connected_nodes;
+ u8 max_nodes;
+ INSERT_PADDING_BYTES(4);
+
+ std::array<EAPoLNodeInfo, UDSMaxNodes> nodes;
};
-static_assert(sizeof(EAPoLStartPacket) == 0x30, "EAPoLStartPacket has the wrong size");
+static_assert(sizeof(EAPoLLogoffPacket) == 0x298, "EAPoLLogoffPacket has the wrong size");
/**
* Generates an unencrypted 802.11 data payload.
@@ -102,5 +125,40 @@ std::vector<u8> GenerateDataPayload(const std::vector<u8>& data, u8 channel, u16
*/
std::vector<u8> GenerateEAPoLStartFrame(u16 association_id, const NodeInfo& node_info);
+/*
+ * Returns the EtherType of the specified 802.11 frame.
+ */
+EtherType GetFrameEtherType(const std::vector<u8>& frame);
+
+/*
+ * Returns the EAPoL type (Start / Logoff) of the specified 802.11 frame.
+ * Note: The frame *must* be an EAPoL frame.
+ */
+u16 GetEAPoLFrameType(const std::vector<u8>& frame);
+
+/*
+ * Returns a deserialized NodeInfo structure from the information inside an EAPoL-Start packet
+ * encapsulated in an 802.11 data frame.
+ */
+NodeInfo DeserializeNodeInfoFromFrame(const std::vector<u8>& frame);
+
+/*
+ * Returns a NodeInfo constructed from the data in the specified EAPoLNodeInfo.
+ */
+NodeInfo DeserializeNodeInfo(const EAPoLNodeInfo& node);
+
+/*
+ * Generates an unencrypted 802.11 data frame body with the EAPoL-Logoff format for UDS
+ * communication.
+ * @returns The generated frame body.
+ */
+std::vector<u8> GenerateEAPoLLogoffFrame(const MacAddress& mac_address, u16 network_node_id,
+ const NodeList& nodes, u8 max_nodes, u8 total_nodes);
+
+/*
+ * Returns a EAPoLLogoffPacket representing the specified 802.11-encapsulated data frame.
+ */
+EAPoLLogoffPacket ParseEAPoLLogoffFrame(const std::vector<u8>& frame);
+
} // namespace NWM
} // namespace Service
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-31 05:37:58 +0100