1 files changed, 1110 insertions, 0 deletions

diff --git a/src/network/room.cpp b/src/network/room.cpp
new file mode 100644
index 000000000..3fc3a0383
--- /dev/null
+++ 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