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-rw-r--r--src/network/room.cpp1110
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diff --git a/src/network/room.cpp b/src/network/room.cpp
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+++ b/src/network/room.cpp
@@ -0,0 +1,1110 @@
+// SPDX-FileCopyrightText: Copyright 2017 Citra Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <algorithm>
+#include <atomic>
+#include <iomanip>
+#include <mutex>
+#include <random>
+#include <regex>
+#include <shared_mutex>
+#include <sstream>
+#include <thread>
+#include "common/logging/log.h"
+#include "enet/enet.h"
+#include "network/packet.h"
+#include "network/room.h"
+#include "network/verify_user.h"
+
+namespace Network {
+
+class Room::RoomImpl {
+public:
+ // This MAC address is used to generate a 'Nintendo' like Mac address.
+ const MacAddress NintendoOUI;
+ std::mt19937 random_gen; ///< Random number generator. Used for GenerateMacAddress
+
+ ENetHost* server = nullptr; ///< Network interface.
+
+ std::atomic<State> state{State::Closed}; ///< Current state of the room.
+ RoomInformation room_information; ///< Information about this room.
+
+ std::string verify_uid; ///< A GUID which may be used for verfication.
+ mutable std::mutex verify_uid_mutex; ///< Mutex for verify_uid
+
+ std::string password; ///< The password required to connect to this room.
+
+ struct Member {
+ std::string nickname; ///< The nickname of the member.
+ std::string console_id_hash; ///< A hash of the console ID of the member.
+ GameInfo game_info; ///< The current game of the member
+ MacAddress mac_address; ///< The assigned mac address of the member.
+ /// Data of the user, often including authenticated forum username.
+ VerifyUser::UserData user_data;
+ ENetPeer* peer; ///< The remote peer.
+ };
+ using MemberList = std::vector<Member>;
+ MemberList members; ///< Information about the members of this room
+ mutable std::shared_mutex member_mutex; ///< Mutex for locking the members list
+
+ UsernameBanList username_ban_list; ///< List of banned usernames
+ IPBanList ip_ban_list; ///< List of banned IP addresses
+ mutable std::mutex ban_list_mutex; ///< Mutex for the ban lists
+
+ RoomImpl()
+ : NintendoOUI{0x00, 0x1F, 0x32, 0x00, 0x00, 0x00}, random_gen(std::random_device()()) {}
+
+ /// Thread that receives and dispatches network packets
+ std::unique_ptr<std::thread> room_thread;
+
+ /// Verification backend of the room
+ std::unique_ptr<VerifyUser::Backend> verify_backend;
+
+ /// Thread function that will receive and dispatch messages until the room is destroyed.
+ void ServerLoop();
+ void StartLoop();
+
+ /**
+ * Parses and answers a room join request from a client.
+ * Validates the uniqueness of the username and assigns the MAC address
+ * that the client will use for the remainder of the connection.
+ */
+ void HandleJoinRequest(const ENetEvent* event);
+
+ /**
+ * Parses and answers a kick request from a client.
+ * Validates the permissions and that the given user exists and then kicks the member.
+ */
+ void HandleModKickPacket(const ENetEvent* event);
+
+ /**
+ * Parses and answers a ban request from a client.
+ * Validates the permissions and bans the user (by forum username or IP).
+ */
+ void HandleModBanPacket(const ENetEvent* event);
+
+ /**
+ * Parses and answers a unban request from a client.
+ * Validates the permissions and unbans the address.
+ */
+ void HandleModUnbanPacket(const ENetEvent* event);
+
+ /**
+ * Parses and answers a get ban list request from a client.
+ * Validates the permissions and returns the ban list.
+ */
+ void HandleModGetBanListPacket(const ENetEvent* event);
+
+ /**
+ * Returns whether the nickname is valid, ie. isn't already taken by someone else in the room.
+ */
+ bool IsValidNickname(const std::string& nickname) const;
+
+ /**
+ * Returns whether the MAC address is valid, ie. isn't already taken by someone else in the
+ * room.
+ */
+ bool IsValidMacAddress(const MacAddress& address) const;
+
+ /**
+ * Returns whether the console ID (hash) is valid, ie. isn't already taken by someone else in
+ * the room.
+ */
+ bool IsValidConsoleId(const std::string& console_id_hash) const;
+
+ /**
+ * Returns whether a user has mod permissions.
+ */
+ bool HasModPermission(const ENetPeer* client) const;
+
+ /**
+ * Sends a ID_ROOM_IS_FULL message telling the client that the room is full.
+ */
+ void SendRoomIsFull(ENetPeer* client);
+
+ /**
+ * Sends a ID_ROOM_NAME_COLLISION message telling the client that the name is invalid.
+ */
+ void SendNameCollision(ENetPeer* client);
+
+ /**
+ * Sends a ID_ROOM_MAC_COLLISION message telling the client that the MAC is invalid.
+ */
+ void SendMacCollision(ENetPeer* client);
+
+ /**
+ * Sends a IdConsoleIdCollison message telling the client that another member with the same
+ * console ID exists.
+ */
+ void SendConsoleIdCollision(ENetPeer* client);
+
+ /**
+ * Sends a ID_ROOM_VERSION_MISMATCH message telling the client that the version is invalid.
+ */
+ void SendVersionMismatch(ENetPeer* client);
+
+ /**
+ * Sends a ID_ROOM_WRONG_PASSWORD message telling the client that the password is wrong.
+ */
+ void SendWrongPassword(ENetPeer* client);
+
+ /**
+ * Notifies the member that its connection attempt was successful,
+ * and it is now part of the room.
+ */
+ void SendJoinSuccess(ENetPeer* client, MacAddress mac_address);
+
+ /**
+ * Notifies the member that its connection attempt was successful,
+ * and it is now part of the room, and it has been granted mod permissions.
+ */
+ void SendJoinSuccessAsMod(ENetPeer* client, MacAddress mac_address);
+
+ /**
+ * Sends a IdHostKicked message telling the client that they have been kicked.
+ */
+ void SendUserKicked(ENetPeer* client);
+
+ /**
+ * Sends a IdHostBanned message telling the client that they have been banned.
+ */
+ void SendUserBanned(ENetPeer* client);
+
+ /**
+ * Sends a IdModPermissionDenied message telling the client that they do not have mod
+ * permission.
+ */
+ void SendModPermissionDenied(ENetPeer* client);
+
+ /**
+ * Sends a IdModNoSuchUser message telling the client that the given user could not be found.
+ */
+ void SendModNoSuchUser(ENetPeer* client);
+
+ /**
+ * Sends the ban list in response to a client's request for getting ban list.
+ */
+ void SendModBanListResponse(ENetPeer* client);
+
+ /**
+ * Notifies the members that the room is closed,
+ */
+ void SendCloseMessage();
+
+ /**
+ * Sends a system message to all the connected clients.
+ */
+ void SendStatusMessage(StatusMessageTypes type, const std::string& nickname,
+ const std::string& username, const std::string& ip);
+
+ /**
+ * Sends the information about the room, along with the list of members
+ * to every connected client in the room.
+ * The packet has the structure:
+ * <MessageID>ID_ROOM_INFORMATION
+ * <String> room_name
+ * <String> room_description
+ * <u32> member_slots: The max number of clients allowed in this room
+ * <String> uid
+ * <u16> port
+ * <u32> num_members: the number of currently joined clients
+ * This is followed by the following three values for each member:
+ * <String> nickname of that member
+ * <MacAddress> mac_address of that member
+ * <String> game_name of that member
+ */
+ void BroadcastRoomInformation();
+
+ /**
+ * Generates a free MAC address to assign to a new client.
+ * The first 3 bytes are the NintendoOUI 0x00, 0x1F, 0x32
+ */
+ MacAddress GenerateMacAddress();
+
+ /**
+ * Broadcasts this packet to all members except the sender.
+ * @param event The ENet event containing the data
+ */
+ void HandleWifiPacket(const ENetEvent* event);
+
+ /**
+ * Extracts a chat entry from a received ENet packet and adds it to the chat queue.
+ * @param event The ENet event that was received.
+ */
+ void HandleChatPacket(const ENetEvent* event);
+
+ /**
+ * Extracts the game name from a received ENet packet and broadcasts it.
+ * @param event The ENet event that was received.
+ */
+ void HandleGameNamePacket(const ENetEvent* event);
+
+ /**
+ * Removes the client from the members list if it was in it and announces the change
+ * to all other clients.
+ */
+ void HandleClientDisconnection(ENetPeer* client);
+};
+
+// RoomImpl
+void Room::RoomImpl::ServerLoop() {
+ while (state != State::Closed) {
+ ENetEvent event;
+ if (enet_host_service(server, &event, 16) > 0) {
+ switch (event.type) {
+ case ENET_EVENT_TYPE_RECEIVE:
+ switch (event.packet->data[0]) {
+ case IdJoinRequest:
+ HandleJoinRequest(&event);
+ break;
+ case IdSetGameInfo:
+ HandleGameNamePacket(&event);
+ break;
+ case IdWifiPacket:
+ HandleWifiPacket(&event);
+ break;
+ case IdChatMessage:
+ HandleChatPacket(&event);
+ break;
+ // Moderation
+ case IdModKick:
+ HandleModKickPacket(&event);
+ break;
+ case IdModBan:
+ HandleModBanPacket(&event);
+ break;
+ case IdModUnban:
+ HandleModUnbanPacket(&event);
+ break;
+ case IdModGetBanList:
+ HandleModGetBanListPacket(&event);
+ break;
+ }
+ enet_packet_destroy(event.packet);
+ break;
+ case ENET_EVENT_TYPE_DISCONNECT:
+ HandleClientDisconnection(event.peer);
+ break;
+ case ENET_EVENT_TYPE_NONE:
+ case ENET_EVENT_TYPE_CONNECT:
+ break;
+ }
+ }
+ }
+ // Close the connection to all members:
+ SendCloseMessage();
+}
+
+void Room::RoomImpl::StartLoop() {
+ room_thread = std::make_unique<std::thread>(&Room::RoomImpl::ServerLoop, this);
+}
+
+void Room::RoomImpl::HandleJoinRequest(const ENetEvent* event) {
+ {
+ std::lock_guard lock(member_mutex);
+ if (members.size() >= room_information.member_slots) {
+ SendRoomIsFull(event->peer);
+ return;
+ }
+ }
+ Packet packet;
+ packet.Append(event->packet->data, event->packet->dataLength);
+ packet.IgnoreBytes(sizeof(u8)); // Ignore the message type
+ std::string nickname;
+ packet.Read(nickname);
+
+ std::string console_id_hash;
+ packet.Read(console_id_hash);
+
+ MacAddress preferred_mac;
+ packet.Read(preferred_mac);
+
+ u32 client_version;
+ packet.Read(client_version);
+
+ std::string pass;
+ packet.Read(pass);
+
+ std::string token;
+ packet.Read(token);
+
+ if (pass != password) {
+ SendWrongPassword(event->peer);
+ return;
+ }
+
+ if (!IsValidNickname(nickname)) {
+ SendNameCollision(event->peer);
+ return;
+ }
+
+ if (preferred_mac != NoPreferredMac) {
+ // Verify if the preferred mac is available
+ if (!IsValidMacAddress(preferred_mac)) {
+ SendMacCollision(event->peer);
+ return;
+ }
+ } else {
+ // Assign a MAC address of this client automatically
+ preferred_mac = GenerateMacAddress();
+ }
+
+ if (!IsValidConsoleId(console_id_hash)) {
+ SendConsoleIdCollision(event->peer);
+ return;
+ }
+
+ if (client_version != network_version) {
+ SendVersionMismatch(event->peer);
+ return;
+ }
+
+ // At this point the client is ready to be added to the room.
+ Member member{};
+ member.mac_address = preferred_mac;
+ member.console_id_hash = console_id_hash;
+ member.nickname = nickname;
+ member.peer = event->peer;
+
+ std::string uid;
+ {
+ std::lock_guard lock(verify_uid_mutex);
+ uid = verify_uid;
+ }
+ member.user_data = verify_backend->LoadUserData(uid, token);
+
+ std::string ip;
+ {
+ std::lock_guard lock(ban_list_mutex);
+
+ // Check username ban
+ if (!member.user_data.username.empty() &&
+ std::find(username_ban_list.begin(), username_ban_list.end(),
+ member.user_data.username) != username_ban_list.end()) {
+
+ SendUserBanned(event->peer);
+ return;
+ }
+
+ // Check IP ban
+ std::array<char, 256> ip_raw{};
+ enet_address_get_host_ip(&event->peer->address, ip_raw.data(), sizeof(ip_raw) - 1);
+ ip = ip_raw.data();
+
+ if (std::find(ip_ban_list.begin(), ip_ban_list.end(), ip) != ip_ban_list.end()) {
+ SendUserBanned(event->peer);
+ return;
+ }
+ }
+
+ // Notify everyone that the user has joined.
+ SendStatusMessage(IdMemberJoin, member.nickname, member.user_data.username, ip);
+
+ {
+ std::lock_guard lock(member_mutex);
+ members.push_back(std::move(member));
+ }
+
+ // Notify everyone that the room information has changed.
+ BroadcastRoomInformation();
+ if (HasModPermission(event->peer)) {
+ SendJoinSuccessAsMod(event->peer, preferred_mac);
+ } else {
+ SendJoinSuccess(event->peer, preferred_mac);
+ }
+}
+
+void Room::RoomImpl::HandleModKickPacket(const ENetEvent* event) {
+ if (!HasModPermission(event->peer)) {
+ SendModPermissionDenied(event->peer);
+ return;
+ }
+
+ Packet packet;
+ packet.Append(event->packet->data, event->packet->dataLength);
+ packet.IgnoreBytes(sizeof(u8)); // Ignore the message type
+
+ std::string nickname;
+ packet.Read(nickname);
+
+ std::string username, ip;
+ {
+ std::lock_guard lock(member_mutex);
+ const auto target_member =
+ std::find_if(members.begin(), members.end(),
+ [&nickname](const auto& member) { return member.nickname == nickname; });
+ if (target_member == members.end()) {
+ SendModNoSuchUser(event->peer);
+ return;
+ }
+
+ // Notify the kicked member
+ SendUserKicked(target_member->peer);
+
+ username = target_member->user_data.username;
+
+ std::array<char, 256> ip_raw{};
+ enet_address_get_host_ip(&target_member->peer->address, ip_raw.data(), sizeof(ip_raw) - 1);
+ ip = ip_raw.data();
+
+ enet_peer_disconnect(target_member->peer, 0);
+ members.erase(target_member);
+ }
+
+ // Announce the change to all clients.
+ SendStatusMessage(IdMemberKicked, nickname, username, ip);
+ BroadcastRoomInformation();
+}
+
+void Room::RoomImpl::HandleModBanPacket(const ENetEvent* event) {
+ if (!HasModPermission(event->peer)) {
+ SendModPermissionDenied(event->peer);
+ return;
+ }
+
+ Packet packet;
+ packet.Append(event->packet->data, event->packet->dataLength);
+ packet.IgnoreBytes(sizeof(u8)); // Ignore the message type
+
+ std::string nickname;
+ packet.Read(nickname);
+
+ std::string username, ip;
+ {
+ std::lock_guard lock(member_mutex);
+ const auto target_member =
+ std::find_if(members.begin(), members.end(),
+ [&nickname](const auto& member) { return member.nickname == nickname; });
+ if (target_member == members.end()) {
+ SendModNoSuchUser(event->peer);
+ return;
+ }
+
+ // Notify the banned member
+ SendUserBanned(target_member->peer);
+
+ nickname = target_member->nickname;
+ username = target_member->user_data.username;
+
+ std::array<char, 256> ip_raw{};
+ enet_address_get_host_ip(&target_member->peer->address, ip_raw.data(), sizeof(ip_raw) - 1);
+ ip = ip_raw.data();
+
+ enet_peer_disconnect(target_member->peer, 0);
+ members.erase(target_member);
+ }
+
+ {
+ std::lock_guard lock(ban_list_mutex);
+
+ if (!username.empty()) {
+ // Ban the forum username
+ if (std::find(username_ban_list.begin(), username_ban_list.end(), username) ==
+ username_ban_list.end()) {
+
+ username_ban_list.emplace_back(username);
+ }
+ }
+
+ // Ban the member's IP as well
+ if (std::find(ip_ban_list.begin(), ip_ban_list.end(), ip) == ip_ban_list.end()) {
+ ip_ban_list.emplace_back(ip);
+ }
+ }
+
+ // Announce the change to all clients.
+ SendStatusMessage(IdMemberBanned, nickname, username, ip);
+ BroadcastRoomInformation();
+}
+
+void Room::RoomImpl::HandleModUnbanPacket(const ENetEvent* event) {
+ if (!HasModPermission(event->peer)) {
+ SendModPermissionDenied(event->peer);
+ return;
+ }
+
+ Packet packet;
+ packet.Append(event->packet->data, event->packet->dataLength);
+ packet.IgnoreBytes(sizeof(u8)); // Ignore the message type
+
+ std::string address;
+ packet.Read(address);
+
+ bool unbanned = false;
+ {
+ std::lock_guard lock(ban_list_mutex);
+
+ auto it = std::find(username_ban_list.begin(), username_ban_list.end(), address);
+ if (it != username_ban_list.end()) {
+ unbanned = true;
+ username_ban_list.erase(it);
+ }
+
+ it = std::find(ip_ban_list.begin(), ip_ban_list.end(), address);
+ if (it != ip_ban_list.end()) {
+ unbanned = true;
+ ip_ban_list.erase(it);
+ }
+ }
+
+ if (unbanned) {
+ SendStatusMessage(IdAddressUnbanned, address, "", "");
+ } else {
+ SendModNoSuchUser(event->peer);
+ }
+}
+
+void Room::RoomImpl::HandleModGetBanListPacket(const ENetEvent* event) {
+ if (!HasModPermission(event->peer)) {
+ SendModPermissionDenied(event->peer);
+ return;
+ }
+
+ SendModBanListResponse(event->peer);
+}
+
+bool Room::RoomImpl::IsValidNickname(const std::string& nickname) const {
+ // A nickname is valid if it matches the regex and is not already taken by anybody else in the
+ // room.
+ const std::regex nickname_regex("^[ a-zA-Z0-9._-]{4,20}$");
+ if (!std::regex_match(nickname, nickname_regex))
+ return false;
+
+ std::lock_guard lock(member_mutex);
+ return std::all_of(members.begin(), members.end(),
+ [&nickname](const auto& member) { return member.nickname != nickname; });
+}
+
+bool Room::RoomImpl::IsValidMacAddress(const MacAddress& address) const {
+ // A MAC address is valid if it is not already taken by anybody else in the room.
+ std::lock_guard lock(member_mutex);
+ return std::all_of(members.begin(), members.end(),
+ [&address](const auto& member) { return member.mac_address != address; });
+}
+
+bool Room::RoomImpl::IsValidConsoleId(const std::string& console_id_hash) const {
+ // A Console ID is valid if it is not already taken by anybody else in the room.
+ std::lock_guard lock(member_mutex);
+ return std::all_of(members.begin(), members.end(), [&console_id_hash](const auto& member) {
+ return member.console_id_hash != console_id_hash;
+ });
+}
+
+bool Room::RoomImpl::HasModPermission(const ENetPeer* client) const {
+ std::lock_guard lock(member_mutex);
+ const auto sending_member =
+ std::find_if(members.begin(), members.end(),
+ [client](const auto& member) { return member.peer == client; });
+ if (sending_member == members.end()) {
+ return false;
+ }
+ if (room_information.enable_yuzu_mods &&
+ sending_member->user_data.moderator) { // Community moderator
+
+ return true;
+ }
+ if (!room_information.host_username.empty() &&
+ sending_member->user_data.username == room_information.host_username) { // Room host
+
+ return true;
+ }
+ return false;
+}
+
+void Room::RoomImpl::SendNameCollision(ENetPeer* client) {
+ Packet packet;
+ packet.Write(static_cast<u8>(IdNameCollision));
+
+ ENetPacket* enet_packet =
+ enet_packet_create(packet.GetData(), packet.GetDataSize(), ENET_PACKET_FLAG_RELIABLE);
+ enet_peer_send(client, 0, enet_packet);
+ enet_host_flush(server);
+}
+
+void Room::RoomImpl::SendMacCollision(ENetPeer* client) {
+ Packet packet;
+ packet.Write(static_cast<u8>(IdMacCollision));
+
+ ENetPacket* enet_packet =
+ enet_packet_create(packet.GetData(), packet.GetDataSize(), ENET_PACKET_FLAG_RELIABLE);
+ enet_peer_send(client, 0, enet_packet);
+ enet_host_flush(server);
+}
+
+void Room::RoomImpl::SendConsoleIdCollision(ENetPeer* client) {
+ Packet packet;
+ packet.Write(static_cast<u8>(IdConsoleIdCollision));
+
+ ENetPacket* enet_packet =
+ enet_packet_create(packet.GetData(), packet.GetDataSize(), ENET_PACKET_FLAG_RELIABLE);
+ enet_peer_send(client, 0, enet_packet);
+ enet_host_flush(server);
+}
+
+void Room::RoomImpl::SendWrongPassword(ENetPeer* client) {
+ Packet packet;
+ packet.Write(static_cast<u8>(IdWrongPassword));
+
+ ENetPacket* enet_packet =
+ enet_packet_create(packet.GetData(), packet.GetDataSize(), ENET_PACKET_FLAG_RELIABLE);
+ enet_peer_send(client, 0, enet_packet);
+ enet_host_flush(server);
+}
+
+void Room::RoomImpl::SendRoomIsFull(ENetPeer* client) {
+ Packet packet;
+ packet.Write(static_cast<u8>(IdRoomIsFull));
+
+ ENetPacket* enet_packet =
+ enet_packet_create(packet.GetData(), packet.GetDataSize(), ENET_PACKET_FLAG_RELIABLE);
+ enet_peer_send(client, 0, enet_packet);
+ enet_host_flush(server);
+}
+
+void Room::RoomImpl::SendVersionMismatch(ENetPeer* client) {
+ Packet packet;
+ packet.Write(static_cast<u8>(IdVersionMismatch));
+ packet.Write(network_version);
+
+ ENetPacket* enet_packet =
+ enet_packet_create(packet.GetData(), packet.GetDataSize(), ENET_PACKET_FLAG_RELIABLE);
+ enet_peer_send(client, 0, enet_packet);
+ enet_host_flush(server);
+}
+
+void Room::RoomImpl::SendJoinSuccess(ENetPeer* client, MacAddress mac_address) {
+ Packet packet;
+ packet.Write(static_cast<u8>(IdJoinSuccess));
+ packet.Write(mac_address);
+ ENetPacket* enet_packet =
+ enet_packet_create(packet.GetData(), packet.GetDataSize(), ENET_PACKET_FLAG_RELIABLE);
+ enet_peer_send(client, 0, enet_packet);
+ enet_host_flush(server);
+}
+
+void Room::RoomImpl::SendJoinSuccessAsMod(ENetPeer* client, MacAddress mac_address) {
+ Packet packet;
+ packet.Write(static_cast<u8>(IdJoinSuccessAsMod));
+ packet.Write(mac_address);
+ ENetPacket* enet_packet =
+ enet_packet_create(packet.GetData(), packet.GetDataSize(), ENET_PACKET_FLAG_RELIABLE);
+ enet_peer_send(client, 0, enet_packet);
+ enet_host_flush(server);
+}
+
+void Room::RoomImpl::SendUserKicked(ENetPeer* client) {
+ Packet packet;
+ packet.Write(static_cast<u8>(IdHostKicked));
+
+ ENetPacket* enet_packet =
+ enet_packet_create(packet.GetData(), packet.GetDataSize(), ENET_PACKET_FLAG_RELIABLE);
+ enet_peer_send(client, 0, enet_packet);
+ enet_host_flush(server);
+}
+
+void Room::RoomImpl::SendUserBanned(ENetPeer* client) {
+ Packet packet;
+ packet.Write(static_cast<u8>(IdHostBanned));
+
+ ENetPacket* enet_packet =
+ enet_packet_create(packet.GetData(), packet.GetDataSize(), ENET_PACKET_FLAG_RELIABLE);
+ enet_peer_send(client, 0, enet_packet);
+ enet_host_flush(server);
+}
+
+void Room::RoomImpl::SendModPermissionDenied(ENetPeer* client) {
+ Packet packet;
+ packet.Write(static_cast<u8>(IdModPermissionDenied));
+
+ ENetPacket* enet_packet =
+ enet_packet_create(packet.GetData(), packet.GetDataSize(), ENET_PACKET_FLAG_RELIABLE);
+ enet_peer_send(client, 0, enet_packet);
+ enet_host_flush(server);
+}
+
+void Room::RoomImpl::SendModNoSuchUser(ENetPeer* client) {
+ Packet packet;
+ packet.Write(static_cast<u8>(IdModNoSuchUser));
+
+ ENetPacket* enet_packet =
+ enet_packet_create(packet.GetData(), packet.GetDataSize(), ENET_PACKET_FLAG_RELIABLE);
+ enet_peer_send(client, 0, enet_packet);
+ enet_host_flush(server);
+}
+
+void Room::RoomImpl::SendModBanListResponse(ENetPeer* client) {
+ Packet packet;
+ packet.Write(static_cast<u8>(IdModBanListResponse));
+ {
+ std::lock_guard lock(ban_list_mutex);
+ packet.Write(username_ban_list);
+ packet.Write(ip_ban_list);
+ }
+
+ ENetPacket* enet_packet =
+ enet_packet_create(packet.GetData(), packet.GetDataSize(), ENET_PACKET_FLAG_RELIABLE);
+ enet_peer_send(client, 0, enet_packet);
+ enet_host_flush(server);
+}
+
+void Room::RoomImpl::SendCloseMessage() {
+ Packet packet;
+ packet.Write(static_cast<u8>(IdCloseRoom));
+ std::lock_guard lock(member_mutex);
+ if (!members.empty()) {
+ ENetPacket* enet_packet =
+ enet_packet_create(packet.GetData(), packet.GetDataSize(), ENET_PACKET_FLAG_RELIABLE);
+ for (auto& member : members) {
+ enet_peer_send(member.peer, 0, enet_packet);
+ }
+ }
+ enet_host_flush(server);
+ for (auto& member : members) {
+ enet_peer_disconnect(member.peer, 0);
+ }
+}
+
+void Room::RoomImpl::SendStatusMessage(StatusMessageTypes type, const std::string& nickname,
+ const std::string& username, const std::string& ip) {
+ Packet packet;
+ packet.Write(static_cast<u8>(IdStatusMessage));
+ packet.Write(static_cast<u8>(type));
+ packet.Write(nickname);
+ packet.Write(username);
+ std::lock_guard lock(member_mutex);
+ if (!members.empty()) {
+ ENetPacket* enet_packet =
+ enet_packet_create(packet.GetData(), packet.GetDataSize(), ENET_PACKET_FLAG_RELIABLE);
+ for (auto& member : members) {
+ enet_peer_send(member.peer, 0, enet_packet);
+ }
+ }
+ enet_host_flush(server);
+
+ const std::string display_name =
+ username.empty() ? nickname : fmt::format("{} ({})", nickname, username);
+
+ switch (type) {
+ case IdMemberJoin:
+ LOG_INFO(Network, "[{}] {} has joined.", ip, display_name);
+ break;
+ case IdMemberLeave:
+ LOG_INFO(Network, "[{}] {} has left.", ip, display_name);
+ break;
+ case IdMemberKicked:
+ LOG_INFO(Network, "[{}] {} has been kicked.", ip, display_name);
+ break;
+ case IdMemberBanned:
+ LOG_INFO(Network, "[{}] {} has been banned.", ip, display_name);
+ break;
+ case IdAddressUnbanned:
+ LOG_INFO(Network, "{} has been unbanned.", display_name);
+ break;
+ }
+}
+
+void Room::RoomImpl::BroadcastRoomInformation() {
+ Packet packet;
+ packet.Write(static_cast<u8>(IdRoomInformation));
+ packet.Write(room_information.name);
+ packet.Write(room_information.description);
+ packet.Write(room_information.member_slots);
+ packet.Write(room_information.port);
+ packet.Write(room_information.preferred_game.name);
+ packet.Write(room_information.host_username);
+
+ packet.Write(static_cast<u32>(members.size()));
+ {
+ std::lock_guard lock(member_mutex);
+ for (const auto& member : members) {
+ packet.Write(member.nickname);
+ packet.Write(member.mac_address);
+ packet.Write(member.game_info.name);
+ packet.Write(member.game_info.id);
+ packet.Write(member.user_data.username);
+ packet.Write(member.user_data.display_name);
+ packet.Write(member.user_data.avatar_url);
+ }
+ }
+
+ ENetPacket* enet_packet =
+ enet_packet_create(packet.GetData(), packet.GetDataSize(), ENET_PACKET_FLAG_RELIABLE);
+ enet_host_broadcast(server, 0, enet_packet);
+ enet_host_flush(server);
+}
+
+MacAddress Room::RoomImpl::GenerateMacAddress() {
+ MacAddress result_mac =
+ NintendoOUI; // The first three bytes of each MAC address will be the NintendoOUI
+ std::uniform_int_distribution<> dis(0x00, 0xFF); // Random byte between 0 and 0xFF
+ do {
+ for (std::size_t i = 3; i < result_mac.size(); ++i) {
+ result_mac[i] = dis(random_gen);
+ }
+ } while (!IsValidMacAddress(result_mac));
+ return result_mac;
+}
+
+void Room::RoomImpl::HandleWifiPacket(const ENetEvent* event) {
+ Packet in_packet;
+ in_packet.Append(event->packet->data, event->packet->dataLength);
+ in_packet.IgnoreBytes(sizeof(u8)); // Message type
+ in_packet.IgnoreBytes(sizeof(u8)); // WifiPacket Type
+ in_packet.IgnoreBytes(sizeof(u8)); // WifiPacket Channel
+ in_packet.IgnoreBytes(sizeof(MacAddress)); // WifiPacket Transmitter Address
+ MacAddress destination_address;
+ in_packet.Read(destination_address);
+
+ Packet out_packet;
+ out_packet.Append(event->packet->data, event->packet->dataLength);
+ ENetPacket* enet_packet = enet_packet_create(out_packet.GetData(), out_packet.GetDataSize(),
+ ENET_PACKET_FLAG_RELIABLE);
+
+ if (destination_address == BroadcastMac) { // Send the data to everyone except the sender
+ std::lock_guard lock(member_mutex);
+ bool sent_packet = false;
+ for (const auto& member : members) {
+ if (member.peer != event->peer) {
+ sent_packet = true;
+ enet_peer_send(member.peer, 0, enet_packet);
+ }
+ }
+
+ if (!sent_packet) {
+ enet_packet_destroy(enet_packet);
+ }
+ } else { // Send the data only to the destination client
+ std::lock_guard lock(member_mutex);
+ auto member = std::find_if(members.begin(), members.end(),
+ [destination_address](const Member& member_entry) -> bool {
+ return member_entry.mac_address == destination_address;
+ });
+ if (member != members.end()) {
+ enet_peer_send(member->peer, 0, enet_packet);
+ } else {
+ LOG_ERROR(Network,
+ "Attempting to send to unknown MAC address: "
+ "{:02X}:{:02X}:{:02X}:{:02X}:{:02X}:{:02X}",
+ destination_address[0], destination_address[1], destination_address[2],
+ destination_address[3], destination_address[4], destination_address[5]);
+ enet_packet_destroy(enet_packet);
+ }
+ }
+ enet_host_flush(server);
+}
+
+void Room::RoomImpl::HandleChatPacket(const ENetEvent* event) {
+ Packet in_packet;
+ in_packet.Append(event->packet->data, event->packet->dataLength);
+
+ in_packet.IgnoreBytes(sizeof(u8)); // Ignore the message type
+ std::string message;
+ in_packet.Read(message);
+ auto CompareNetworkAddress = [event](const Member member) -> bool {
+ return member.peer == event->peer;
+ };
+
+ std::lock_guard lock(member_mutex);
+ const auto sending_member = std::find_if(members.begin(), members.end(), CompareNetworkAddress);
+ if (sending_member == members.end()) {
+ return; // Received a chat message from a unknown sender
+ }
+
+ // Limit the size of chat messages to MaxMessageSize
+ message.resize(std::min(static_cast<u32>(message.size()), MaxMessageSize));
+
+ Packet out_packet;
+ out_packet.Write(static_cast<u8>(IdChatMessage));
+ out_packet.Write(sending_member->nickname);
+ out_packet.Write(sending_member->user_data.username);
+ out_packet.Write(message);
+
+ ENetPacket* enet_packet = enet_packet_create(out_packet.GetData(), out_packet.GetDataSize(),
+ ENET_PACKET_FLAG_RELIABLE);
+ bool sent_packet = false;
+ for (const auto& member : members) {
+ if (member.peer != event->peer) {
+ sent_packet = true;
+ enet_peer_send(member.peer, 0, enet_packet);
+ }
+ }
+
+ if (!sent_packet) {
+ enet_packet_destroy(enet_packet);
+ }
+
+ enet_host_flush(server);
+
+ if (sending_member->user_data.username.empty()) {
+ LOG_INFO(Network, "{}: {}", sending_member->nickname, message);
+ } else {
+ LOG_INFO(Network, "{} ({}): {}", sending_member->nickname,
+ sending_member->user_data.username, message);
+ }
+}
+
+void Room::RoomImpl::HandleGameNamePacket(const ENetEvent* event) {
+ Packet in_packet;
+ in_packet.Append(event->packet->data, event->packet->dataLength);
+
+ in_packet.IgnoreBytes(sizeof(u8)); // Ignore the message type
+ GameInfo game_info;
+ in_packet.Read(game_info.name);
+ in_packet.Read(game_info.id);
+
+ {
+ std::lock_guard lock(member_mutex);
+ auto member = std::find_if(members.begin(), members.end(),
+ [event](const Member& member_entry) -> bool {
+ return member_entry.peer == event->peer;
+ });
+ if (member != members.end()) {
+ member->game_info = game_info;
+
+ const std::string display_name =
+ member->user_data.username.empty()
+ ? member->nickname
+ : fmt::format("{} ({})", member->nickname, member->user_data.username);
+
+ if (game_info.name.empty()) {
+ LOG_INFO(Network, "{} is not playing", display_name);
+ } else {
+ LOG_INFO(Network, "{} is playing {}", display_name, game_info.name);
+ }
+ }
+ }
+ BroadcastRoomInformation();
+}
+
+void Room::RoomImpl::HandleClientDisconnection(ENetPeer* client) {
+ // Remove the client from the members list.
+ std::string nickname, username, ip;
+ {
+ std::lock_guard lock(member_mutex);
+ auto member =
+ std::find_if(members.begin(), members.end(), [client](const Member& member_entry) {
+ return member_entry.peer == client;
+ });
+ if (member != members.end()) {
+ nickname = member->nickname;
+ username = member->user_data.username;
+
+ std::array<char, 256> ip_raw{};
+ enet_address_get_host_ip(&member->peer->address, ip_raw.data(), sizeof(ip_raw) - 1);
+ ip = ip_raw.data();
+
+ members.erase(member);
+ }
+ }
+
+ // Announce the change to all clients.
+ enet_peer_disconnect(client, 0);
+ if (!nickname.empty())
+ SendStatusMessage(IdMemberLeave, nickname, username, ip);
+ BroadcastRoomInformation();
+}
+
+// Room
+Room::Room() : room_impl{std::make_unique<RoomImpl>()} {}
+
+Room::~Room() = default;
+
+bool Room::Create(const std::string& name, const std::string& description,
+ const std::string& server_address, u16 server_port, const std::string& password,
+ const u32 max_connections, const std::string& host_username,
+ const GameInfo preferred_game,
+ std::unique_ptr<VerifyUser::Backend> verify_backend,
+ const Room::BanList& ban_list, bool enable_yuzu_mods) {
+ ENetAddress address;
+ address.host = ENET_HOST_ANY;
+ if (!server_address.empty()) {
+ enet_address_set_host(&address, server_address.c_str());
+ }
+ address.port = server_port;
+
+ // In order to send the room is full message to the connecting client, we need to leave one
+ // slot open so enet won't reject the incoming connection without telling us
+ room_impl->server = enet_host_create(&address, max_connections + 1, NumChannels, 0, 0);
+ if (!room_impl->server) {
+ return false;
+ }
+ room_impl->state = State::Open;
+
+ room_impl->room_information.name = name;
+ room_impl->room_information.description = description;
+ room_impl->room_information.member_slots = max_connections;
+ room_impl->room_information.port = server_port;
+ room_impl->room_information.preferred_game = preferred_game;
+ room_impl->room_information.host_username = host_username;
+ room_impl->room_information.enable_yuzu_mods = enable_yuzu_mods;
+ room_impl->password = password;
+ room_impl->verify_backend = std::move(verify_backend);
+ room_impl->username_ban_list = ban_list.first;
+ room_impl->ip_ban_list = ban_list.second;
+
+ room_impl->StartLoop();
+ return true;
+}
+
+Room::State Room::GetState() const {
+ return room_impl->state;
+}
+
+const RoomInformation& Room::GetRoomInformation() const {
+ return room_impl->room_information;
+}
+
+std::string Room::GetVerifyUID() const {
+ std::lock_guard lock(room_impl->verify_uid_mutex);
+ return room_impl->verify_uid;
+}
+
+Room::BanList Room::GetBanList() const {
+ std::lock_guard lock(room_impl->ban_list_mutex);
+ return {room_impl->username_ban_list, room_impl->ip_ban_list};
+}
+
+std::vector<Member> Room::GetRoomMemberList() const {
+ std::vector<Member> member_list;
+ std::lock_guard lock(room_impl->member_mutex);
+ for (const auto& member_impl : room_impl->members) {
+ Member member;
+ member.nickname = member_impl.nickname;
+ member.username = member_impl.user_data.username;
+ member.display_name = member_impl.user_data.display_name;
+ member.avatar_url = member_impl.user_data.avatar_url;
+ member.mac_address = member_impl.mac_address;
+ member.game = member_impl.game_info;
+ member_list.push_back(member);
+ }
+ return member_list;
+}
+
+bool Room::HasPassword() const {
+ return !room_impl->password.empty();
+}
+
+void Room::SetVerifyUID(const std::string& uid) {
+ std::lock_guard lock(room_impl->verify_uid_mutex);
+ room_impl->verify_uid = uid;
+}
+
+void Room::Destroy() {
+ room_impl->state = State::Closed;
+ room_impl->room_thread->join();
+ room_impl->room_thread.reset();
+
+ if (room_impl->server) {
+ enet_host_destroy(room_impl->server);
+ }
+ room_impl->room_information = {};
+ room_impl->server = nullptr;
+ {
+ std::lock_guard lock(room_impl->member_mutex);
+ room_impl->members.clear();
+ }
+ room_impl->room_information.member_slots = 0;
+ room_impl->room_information.name.clear();
+}
+
+} // namespace Network