yuzu: Add ui files for multiplayer rooms

dist/license.md

@@ -3,6 +3,9 @@ The icons in this folder and its subfolders have the following licenses:
 Icon Name | License | Origin/Author
 --- | --- | ---
 qt_themes/default/icons/16x16/checked.png | CC BY-ND 3.0 | https://icons8.com
+qt_themes/default/icons/16x16/connected.png | CC BY-ND 3.0 | https://icons8.com
+qt_themes/default/icons/16x16/connected_notification.png | CC BY-ND 3.0 | https://icons8.com
+qt_themes/default/icons/16x16/disconnected.png | CC BY-ND 3.0 | https://icons8.com
 qt_themes/default/icons/16x16/failed.png | CC BY-ND 3.0 | https://icons8.com
 qt_themes/default/icons/16x16/lock.png | CC BY-ND 3.0 | https://icons8.com
 qt_themes/default/icons/16x16/view-refresh.png | Apache 2.0 | https://material.io
@@ -10,18 +13,24 @@ qt_themes/default/icons/256x256/plus_folder.png | CC BY-ND 3.0 | https://icons8.
 qt_themes/default/icons/48x48/bad_folder.png | CC BY-ND 3.0 | https://icons8.com
 qt_themes/default/icons/48x48/chip.png | CC BY-ND 3.0 | https://icons8.com
 qt_themes/default/icons/48x48/folder.png | CC BY-ND 3.0 | https://icons8.com
+qt_themes/default/icons/48x48/no_avatar.png | CC BY-ND 3.0 | https://icons8.com
 qt_themes/default/icons/48x48/plus.png | CC0 1.0 | Designed by BreadFish64 from the Citra team
 qt_themes/default/icons/48x48/sd_card.png | CC BY-ND 3.0 | https://icons8.com
 qt_themes/default/icons/48x48/star.png | CC BY-ND 3.0 | https://icons8.com
+qt_themes/qdarkstyle/icons/16x16/connected.png | CC BY-ND 3.0 | https://icons8.com
+qt_themes/qdarkstyle/icons/16x16/connected_notification.png | CC BY-ND 3.0 | https://icons8.com
 qt_themes/qdarkstyle/icons/16x16/lock.png | CC BY-ND 3.0 | https://icons8.com
 qt_themes/qdarkstyle/icons/16x16/view-refresh.png | Apache 2.0 | https://material.io
 qt_themes/qdarkstyle/icons/256x256/plus_folder.png | CC BY-ND 3.0 | https://icons8.com
 qt_themes/qdarkstyle/icons/48x48/bad_folder.png | CC BY-ND 3.0 | https://icons8.com
 qt_themes/qdarkstyle/icons/48x48/chip.png | CC BY-ND 3.0 | https://icons8.com
 qt_themes/qdarkstyle/icons/48x48/folder.png | CC BY-ND 3.0 | https://icons8.com
+qt_themes/qdarkstyle/icons/48x48/no_avatar.png | CC BY-ND 3.0 | https://icons8.com
 qt_themes/qdarkstyle/icons/48x48/plus.png | CC0 1.0 | Designed by BreadFish64 from the Citra team
 qt_themes/qdarkstyle/icons/48x48/sd_card.png | CC BY-ND 3.0 | https://icons8.com
 qt_themes/qdarkstyle/icons/48x48/star.png | CC BY-ND 3.0 | https://icons8.com
+qt_themes/colorful/icons/16x16/connected.png | CC BY-ND 3.0 | https://icons8.com
+qt_themes/colorful/icons/16x16/connected_notification.png | CC BY-ND 3.0 | https://icons8.com
 qt_themes/colorful/icons/16x16/lock.png | CC BY-ND 3.0 | https://icons8.com
 qt_themes/colorful/icons/16x16/view-refresh.png | Apache 2.0 | https://material.io
 qt_themes/colorful/icons/256x256/plus_folder.png | CC BY-ND 3.0 | https://icons8.com

dist/qt_themes/colorful/style.qrc

@@ -1,6 +1,9 @@
 <RCC>
     <qresource prefix="icons/colorful">
         <file alias="index.theme">icons/index.theme</file>
+        <file alias="16x16/connected.png">icons/16x16/connected.png</file>
+        <file alias="16x16/connected_notification.png">icons/16x16/connected_notification.png</file>
+        <file alias="16x16/disconnected.png">icons/16x16/disconnected.png</file>
         <file alias="16x16/lock.png">icons/16x16/lock.png</file>
         <file alias="48x48/bad_folder.png">icons/48x48/bad_folder.png</file>
         <file alias="48x48/chip.png">icons/48x48/chip.png</file>

dist/qt_themes/colorful_dark/style.qrc

@@ -1,11 +1,15 @@
 <RCC>
     <qresource prefix="icons/colorful_dark">
+        <file alias="16x16/connected.png">../colorful/icons/16x16/connected.png</file>
+        <file alias="16x16/connected_notification.png">../colorful/icons/16x16/connected_notification.png</file>
+        <file alias="16x16/disconnected.png">../colorful/icons/16x16/disconnected.png</file>
         <file alias="index.theme">icons/index.theme</file>
         <file alias="16x16/lock.png">icons/16x16/lock.png</file>
         <file alias="16x16/view-refresh.png">icons/16x16/view-refresh.png</file>
         <file alias="48x48/bad_folder.png">../colorful/icons/48x48/bad_folder.png</file>
         <file alias="48x48/chip.png">../colorful/icons/48x48/chip.png</file>
         <file alias="48x48/folder.png">../colorful/icons/48x48/folder.png</file>
+        <file alias="48x48/no_avatar.png">../qdarkstyle/icons/48x48/no_avatar.png</file>
         <file alias="48x48/plus.png">../colorful/icons/48x48/plus.png</file>
         <file alias="48x48/sd_card.png">../colorful/icons/48x48/sd_card.png</file>
         <file alias="256x256/plus_folder.png">../colorful/icons/256x256/plus_folder.png</file>

dist/qt_themes/default/default.qrc

@@ -4,10 +4,14 @@
         <file alias="16x16/checked.png">icons/16x16/checked.png</file>
         <file alias="16x16/failed.png">icons/16x16/failed.png</file>
         <file alias="16x16/lock.png">icons/16x16/lock.png</file>
+        <file alias="16x16/connected.png">icons/16x16/connected.png</file>
+        <file alias="16x16/disconnected.png">icons/16x16/disconnected.png</file>
+        <file alias="16x16/connected_notification.png">icons/16x16/connected_notification.png</file>
         <file alias="16x16/view-refresh.png">icons/16x16/view-refresh.png</file>
         <file alias="48x48/bad_folder.png">icons/48x48/bad_folder.png</file>
         <file alias="48x48/chip.png">icons/48x48/chip.png</file>
         <file alias="48x48/folder.png">icons/48x48/folder.png</file>
+        <file alias="48x48/no_avatar.png">icons/48x48/no_avatar.png</file>
         <file alias="48x48/plus.png">icons/48x48/plus.png</file>
         <file alias="48x48/sd_card.png">icons/48x48/sd_card.png</file>
         <file alias="48x48/star.png">icons/48x48/star.png</file>

dist/qt_themes/qdarkstyle/style.qrc

@@ -1,11 +1,15 @@
 <RCC>
   <qresource prefix="icons/qdarkstyle">
     <file alias="index.theme">icons/index.theme</file>
+    <file alias="16x16/connected.png">icons/16x16/connected.png</file>
+    <file alias="16x16/disconnected.png">icons/16x16/disconnected.png</file>
+    <file alias="16x16/connected_notification.png">icons/16x16/connected_notification.png</file>
     <file alias="16x16/lock.png">icons/16x16/lock.png</file>
     <file alias="16x16/view-refresh.png">icons/16x16/view-refresh.png</file>
     <file alias="48x48/bad_folder.png">icons/48x48/bad_folder.png</file>
     <file alias="48x48/chip.png">icons/48x48/chip.png</file>
     <file alias="48x48/folder.png">icons/48x48/folder.png</file>
+    <file alias="48x48/no_avatar.png">icons/48x48/no_avatar.png</file>
     <file alias="48x48/plus.png">icons/48x48/plus.png</file>
     <file alias="48x48/sd_card.png">icons/48x48/sd_card.png</file>
     <file alias="48x48/star.png">icons/48x48/star.png</file>

externals/cpp-jwt

@@ -0,0 +1 @@
+Subproject commit e12ef06218596b52d9b5d6e1639484866a8e7067

src/common/CMakeLists.txt

@@ -41,6 +41,7 @@ add_custom_command(OUTPUT scm_rev.cpp
 add_library(common STATIC
     algorithm.h
     alignment.h
+    announce_multiplayer_room.h
     assert.cpp
     assert.h
     atomic_helpers.h

src/common/announce_multiplayer_room.h

@@ -0,0 +1,138 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include <functional>
+#include <string>
+#include <vector>
+#include "common/common_types.h"
+#include "web_service/web_result.h"
+
+namespace AnnounceMultiplayerRoom {
+
+using MacAddress = std::array<u8, 6>;
+
+struct Room {
+    struct Member {
+        std::string username;
+        std::string nickname;
+        std::string avatar_url;
+        MacAddress mac_address;
+        std::string game_name;
+        u64 game_id;
+    };
+    std::string id;
+    std::string verify_UID; ///< UID used for verification
+    std::string name;
+    std::string description;
+    std::string owner;
+    std::string ip;
+    u16 port;
+    u32 max_player;
+    u32 net_version;
+    bool has_password;
+    std::string preferred_game;
+    u64 preferred_game_id;
+
+    std::vector<Member> members;
+};
+using RoomList = std::vector<Room>;
+
+/**
+ * A AnnounceMultiplayerRoom interface class. A backend to submit/get to/from a web service should
+ * implement this interface.
+ */
+class Backend {
+public:
+    virtual ~Backend() = default;
+
+    /**
+     * Sets the Information that gets used for the announce
+     * @param uid The Id of the room
+     * @param name The name of the room
+     * @param description The room description
+     * @param port The port of the room
+     * @param net_version The version of the libNetwork that gets used
+     * @param has_password True if the room is passowrd protected
+     * @param preferred_game The preferred game of the room
+     * @param preferred_game_id The title id of the preferred game
+     */
+    virtual void SetRoomInformation(const std::string& name, const std::string& description,
+                                    const u16 port, const u32 max_player, const u32 net_version,
+                                    const bool has_password, const std::string& preferred_game,
+                                    const u64 preferred_game_id) = 0;
+    /**
+     * Adds a player information to the data that gets announced
+     * @param nickname The nickname of the player
+     * @param mac_address The MAC Address of the player
+     * @param game_id The title id of the game the player plays
+     * @param game_name The name of the game the player plays
+     */
+    virtual void AddPlayer(const std::string& username, const std::string& nickname,
+                           const std::string& avatar_url, const MacAddress& mac_address,
+                           const u64 game_id, const std::string& game_name) = 0;
+
+    /**
+     * Updates the data in the announce service. Re-register the room when required.
+     * @result The result of the update attempt
+     */
+    virtual WebService::WebResult Update() = 0;
+
+    /**
+     * Registers the data in the announce service
+     * @result The result of the register attempt. When the result code is Success, A global Guid of
+     * the room which may be used for verification will be in the result's returned_data.
+     */
+    virtual WebService::WebResult Register() = 0;
+
+    /**
+     * Empties the stored players
+     */
+    virtual void ClearPlayers() = 0;
+
+    /**
+     * Get the room information from the announce service
+     * @result A list of all rooms the announce service has
+     */
+    virtual RoomList GetRoomList() = 0;
+
+    /**
+     * Sends a delete message to the announce service
+     */
+    virtual void Delete() = 0;
+};
+
+/**
+ * Empty implementation of AnnounceMultiplayerRoom interface that drops all data. Used when a
+ * functional backend implementation is not available.
+ */
+class NullBackend : public Backend {
+public:
+    ~NullBackend() = default;
+    void SetRoomInformation(const std::string& /*name*/, const std::string& /*description*/,
+                            const u16 /*port*/, const u32 /*max_player*/, const u32 /*net_version*/,
+                            const bool /*has_password*/, const std::string& /*preferred_game*/,
+                            const u64 /*preferred_game_id*/) override {}
+    void AddPlayer(const std::string& /*username*/, const std::string& /*nickname*/,
+                   const std::string& /*avatar_url*/, const MacAddress& /*mac_address*/,
+                   const u64 /*game_id*/, const std::string& /*game_name*/) override {}
+    WebService::WebResult Update() override {
+        return WebService::WebResult{WebService::WebResult::Code::NoWebservice,
+                                     "WebService is missing"};
+    }
+    WebService::WebResult Register() override {
+        return WebService::WebResult{WebService::WebResult::Code::NoWebservice,
+                                     "WebService is missing"};
+    }
+    void ClearPlayers() override {}
+    RoomList GetRoomList() override {
+        return RoomList{};
+    }
+
+    void Delete() override {}
+};
+
+} // namespace AnnounceMultiplayerRoom

src/core/CMakeLists.txt

@@ -1,4 +1,6 @@
 add_library(core STATIC
+    announce_multiplayer_session.cpp
+    announce_multiplayer_session.h
     arm/arm_interface.h
     arm/arm_interface.cpp
     arm/cpu_interrupt_handler.cpp
@@ -741,11 +743,11 @@ add_library(core STATIC
     memory/dmnt_cheat_vm.h
     memory.cpp
     memory.h
-    network/network.cpp
-    network/network.h
-    network/network_interface.cpp
-    network/network_interface.h
-    network/sockets.h
+    internal_network/network.cpp
+    internal_network/network.h
+    internal_network/network_interface.cpp
+    internal_network/network_interface.h
+    internal_network/sockets.h
     perf_stats.cpp
     perf_stats.h
     reporter.cpp
@@ -780,7 +782,7 @@ endif()
 
 create_target_directory_groups(core)
 
-target_link_libraries(core PUBLIC common PRIVATE audio_core video_core)
+target_link_libraries(core PUBLIC common PRIVATE audio_core network video_core)
 target_link_libraries(core PUBLIC Boost::boost PRIVATE fmt::fmt nlohmann_json::nlohmann_json mbedtls Opus::Opus)
 if (MINGW)
     target_link_libraries(core PRIVATE ${MSWSOCK_LIBRARY})

src/core/announce_multiplayer_session.cpp

@@ -0,0 +1,165 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <chrono>
+#include <future>
+#include <vector>
+#include "announce_multiplayer_session.h"
+#include "common/announce_multiplayer_room.h"
+#include "common/assert.h"
+#include "common/settings.h"
+#include "network/network.h"
+
+#ifdef ENABLE_WEB_SERVICE
+#include "web_service/announce_room_json.h"
+#endif
+
+namespace Core {
+
+// Time between room is announced to web_service
+static constexpr std::chrono::seconds announce_time_interval(15);
+
+AnnounceMultiplayerSession::AnnounceMultiplayerSession() {
+#ifdef ENABLE_WEB_SERVICE
+    backend = std::make_unique<WebService::RoomJson>(Settings::values.web_api_url.GetValue(),
+                                                     Settings::values.yuzu_username.GetValue(),
+                                                     Settings::values.yuzu_token.GetValue());
+#else
+    backend = std::make_unique<AnnounceMultiplayerRoom::NullBackend>();
+#endif
+}
+
+WebService::WebResult AnnounceMultiplayerSession::Register() {
+    std::shared_ptr<Network::Room> room = Network::GetRoom().lock();
+    if (!room) {
+        return WebService::WebResult{WebService::WebResult::Code::LibError,
+                                     "Network is not initialized"};
+    }
+    if (room->GetState() != Network::Room::State::Open) {
+        return WebService::WebResult{WebService::WebResult::Code::LibError, "Room is not open"};
+    }
+    UpdateBackendData(room);
+    WebService::WebResult result = backend->Register();
+    if (result.result_code != WebService::WebResult::Code::Success) {
+        return result;
+    }
+    LOG_INFO(WebService, "Room has been registered");
+    room->SetVerifyUID(result.returned_data);
+    registered = true;
+    return WebService::WebResult{WebService::WebResult::Code::Success};
+}
+
+void AnnounceMultiplayerSession::Start() {
+    if (announce_multiplayer_thread) {
+        Stop();
+    }
+    shutdown_event.Reset();
+    announce_multiplayer_thread =
+        std::make_unique<std::thread>(&AnnounceMultiplayerSession::AnnounceMultiplayerLoop, this);
+}
+
+void AnnounceMultiplayerSession::Stop() {
+    if (announce_multiplayer_thread) {
+        shutdown_event.Set();
+        announce_multiplayer_thread->join();
+        announce_multiplayer_thread.reset();
+        backend->Delete();
+        registered = false;
+    }
+}
+
+AnnounceMultiplayerSession::CallbackHandle AnnounceMultiplayerSession::BindErrorCallback(
+    std::function<void(const WebService::WebResult&)> function) {
+    std::lock_guard lock(callback_mutex);
+    auto handle = std::make_shared<std::function<void(const WebService::WebResult&)>>(function);
+    error_callbacks.insert(handle);
+    return handle;
+}
+
+void AnnounceMultiplayerSession::UnbindErrorCallback(CallbackHandle handle) {
+    std::lock_guard lock(callback_mutex);
+    error_callbacks.erase(handle);
+}
+
+AnnounceMultiplayerSession::~AnnounceMultiplayerSession() {
+    Stop();
+}
+
+void AnnounceMultiplayerSession::UpdateBackendData(std::shared_ptr<Network::Room> room) {
+    Network::RoomInformation room_information = room->GetRoomInformation();
+    std::vector<Network::Room::Member> memberlist = room->GetRoomMemberList();
+    backend->SetRoomInformation(
+        room_information.name, room_information.description, room_information.port,
+        room_information.member_slots, Network::network_version, room->HasPassword(),
+        room_information.preferred_game, room_information.preferred_game_id);
+    backend->ClearPlayers();
+    for (const auto& member : memberlist) {
+        backend->AddPlayer(member.username, member.nickname, member.avatar_url, member.mac_address,
+                           member.game_info.id, member.game_info.name);
+    }
+}
+
+void AnnounceMultiplayerSession::AnnounceMultiplayerLoop() {
+    // Invokes all current bound error callbacks.
+    const auto ErrorCallback = [this](WebService::WebResult result) {
+        std::lock_guard<std::mutex> lock(callback_mutex);
+        for (auto callback : error_callbacks) {
+            (*callback)(result);
+        }
+    };
+
+    if (!registered) {
+        WebService::WebResult result = Register();
+        if (result.result_code != WebService::WebResult::Code::Success) {
+            ErrorCallback(result);
+            return;
+        }
+    }
+
+    auto update_time = std::chrono::steady_clock::now();
+    std::future<WebService::WebResult> future;
+    while (!shutdown_event.WaitUntil(update_time)) {
+        update_time += announce_time_interval;
+        std::shared_ptr<Network::Room> room = Network::GetRoom().lock();
+        if (!room) {
+            break;
+        }
+        if (room->GetState() != Network::Room::State::Open) {
+            break;
+        }
+        UpdateBackendData(room);
+        WebService::WebResult result = backend->Update();
+        if (result.result_code != WebService::WebResult::Code::Success) {
+            ErrorCallback(result);
+        }
+        if (result.result_string == "404") {
+            registered = false;
+            // Needs to register the room again
+            WebService::WebResult register_result = Register();
+            if (register_result.result_code != WebService::WebResult::Code::Success) {
+                ErrorCallback(register_result);
+            }
+        }
+    }
+}
+
+AnnounceMultiplayerRoom::RoomList AnnounceMultiplayerSession::GetRoomList() {
+    return backend->GetRoomList();
+}
+
+bool AnnounceMultiplayerSession::IsRunning() const {
+    return announce_multiplayer_thread != nullptr;
+}
+
+void AnnounceMultiplayerSession::UpdateCredentials() {
+    ASSERT_MSG(!IsRunning(), "Credentials can only be updated when session is not running");
+
+#ifdef ENABLE_WEB_SERVICE
+    backend = std::make_unique<WebService::RoomJson>(Settings::values.web_api_url.GetValue(),
+                                                     Settings::values.yuzu_username.GetValue(),
+                                                     Settings::values.yuzu_token.GetValue());
+#endif
+}
+
+} // namespace Core

src/core/announce_multiplayer_session.h

@@ -0,0 +1,96 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <atomic>
+#include <functional>
+#include <memory>
+#include <mutex>
+#include <set>
+#include <thread>
+#include "common/announce_multiplayer_room.h"
+#include "common/common_types.h"
+#include "common/thread.h"
+
+namespace Network {
+class Room;
+}
+
+namespace Core {
+
+/**
+ * Instruments AnnounceMultiplayerRoom::Backend.
+ * Creates a thread that regularly updates the room information and submits them
+ * An async get of room information is also possible
+ */
+class AnnounceMultiplayerSession {
+public:
+    using CallbackHandle = std::shared_ptr<std::function<void(const WebService::WebResult&)>>;
+    AnnounceMultiplayerSession();
+    ~AnnounceMultiplayerSession();
+
+    /**
+     * Allows to bind a function that will get called if the announce encounters an error
+     * @param function The function that gets called
+     * @return A handle that can be used the unbind the function
+     */
+    CallbackHandle BindErrorCallback(std::function<void(const WebService::WebResult&)> function);
+
+    /**
+     * Unbind a function from the error callbacks
+     * @param handle The handle for the function that should get unbind
+     */
+    void UnbindErrorCallback(CallbackHandle handle);
+
+    /**
+     * Registers a room to web services
+     * @return The result of the registration attempt.
+     */
+    WebService::WebResult Register();
+
+    /**
+     * Starts the announce of a room to web services
+     */
+    void Start();
+
+    /**
+     * Stops the announce to web services
+     */
+    void Stop();
+
+    /**
+     *  Returns a list of all room information the backend got
+     * @param func A function that gets executed when the async get finished, e.g. a signal
+     * @return a list of rooms received from the web service
+     */
+    AnnounceMultiplayerRoom::RoomList GetRoomList();
+
+    /**
+     * Whether the announce session is still running
+     */
+    bool IsRunning() const;
+
+    /**
+     * Recreates the backend, updating the credentials.
+     * This can only be used when the announce session is not running.
+     */
+    void UpdateCredentials();
+
+private:
+    Common::Event shutdown_event;
+    std::mutex callback_mutex;
+    std::set<CallbackHandle> error_callbacks;
+    std::unique_ptr<std::thread> announce_multiplayer_thread;
+
+    /// Backend interface that logs fields
+    std::unique_ptr<AnnounceMultiplayerRoom::Backend> backend;
+
+    std::atomic_bool registered = false; ///< Whether the room has been registered
+
+    void UpdateBackendData(std::shared_ptr<Network::Room> room);
+    void AnnounceMultiplayerLoop();
+};
+
+} // namespace Core

src/core/core.cpp

@@ -43,14 +43,15 @@
 #include "core/hle/service/service.h"
 #include "core/hle/service/sm/sm.h"
 #include "core/hle/service/time/time_manager.h"
+#include "core/internal_network/network.h"
 #include "core/loader/loader.h"
 #include "core/memory.h"
 #include "core/memory/cheat_engine.h"
-#include "core/network/network.h"
 #include "core/perf_stats.h"
 #include "core/reporter.h"
 #include "core/telemetry_session.h"
 #include "core/tools/freezer.h"
+#include "network/network.h"
 #include "video_core/renderer_base.h"
 #include "video_core/video_core.h"
 
@@ -315,6 +316,15 @@ struct System::Impl {
         GetAndResetPerfStats();
         perf_stats->BeginSystemFrame();
 
+        std::string name = "Unknown Game";
+        const Loader::ResultStatus res{app_loader->ReadTitle(name)};
+        if (auto room_member = Network::GetRoomMember().lock()) {
+            Network::GameInfo game_info;
+            game_info.name = name;
+            game_info.id = program_id;
+            room_member->SendGameInfo(game_info);
+        }
+
         status = SystemResultStatus::Success;
         return status;
     }
@@ -362,6 +372,11 @@ struct System::Impl {
         memory.Reset();
         applet_manager.ClearAll();
 
+        if (auto room_member = Network::GetRoomMember().lock()) {
+            Network::GameInfo game_info{};
+            room_member->SendGameInfo(game_info);
+        }
+
         LOG_DEBUG(Core, "Shutdown OK");
     }
 

src/core/hle/service/nifm/nifm.cpp

@@ -18,8 +18,8 @@ namespace {
 
 } // Anonymous namespace
 
-#include "core/network/network.h"
-#include "core/network/network_interface.h"
+#include "core/internal_network/network.h"
+#include "core/internal_network/network_interface.h"
 
 namespace Service::NIFM {
 

src/core/hle/service/sockets/bsd.cpp

@@ -13,8 +13,8 @@
 #include "core/hle/kernel/k_thread.h"
 #include "core/hle/service/sockets/bsd.h"
 #include "core/hle/service/sockets/sockets_translate.h"
-#include "core/network/network.h"
-#include "core/network/sockets.h"
+#include "core/internal_network/network.h"
+#include "core/internal_network/sockets.h"
 
 namespace Service::Sockets {
 

src/core/hle/service/sockets/bsd.h

@@ -16,7 +16,7 @@ class System;
 
 namespace Network {
 class Socket;
-}
+} // namespace Network
 
 namespace Service::Sockets {
 

src/core/hle/service/sockets/sockets_translate.cpp

@@ -7,7 +7,7 @@
 #include "common/common_types.h"
 #include "core/hle/service/sockets/sockets.h"
 #include "core/hle/service/sockets/sockets_translate.h"
-#include "core/network/network.h"
+#include "core/internal_network/network.h"
 
 namespace Service::Sockets {
 

src/core/hle/service/sockets/sockets_translate.h

@@ -7,7 +7,7 @@
 
 #include "common/common_types.h"
 #include "core/hle/service/sockets/sockets.h"
-#include "core/network/network.h"
+#include "core/internal_network/network.h"
 
 namespace Service::Sockets {
 

src/core/internal_network/network.cpp

@@ -29,9 +29,9 @@
 #include "common/common_types.h"
 #include "common/logging/log.h"
 #include "common/settings.h"
-#include "core/network/network.h"
-#include "core/network/network_interface.h"
-#include "core/network/sockets.h"
+#include "core/internal_network/network.h"
+#include "core/internal_network/network_interface.h"
+#include "core/internal_network/sockets.h"
 
 namespace Network {
 

src/core/internal_network/network_interface.cpp

@@ -11,7 +11,7 @@
 #include "common/logging/log.h"
 #include "common/settings.h"
 #include "common/string_util.h"
-#include "core/network/network_interface.h"
+#include "core/internal_network/network_interface.h"
 
 #ifdef _WIN32
 #include <iphlpapi.h>

src/core/internal_network/sockets.h

@@ -3,6 +3,7 @@
 
 #pragma once
 
+#include <map>
 #include <memory>
 #include <utility>
 
@@ -12,7 +13,7 @@
 #endif
 
 #include "common/common_types.h"
-#include "core/network/network.h"
+#include "core/internal_network/network.h"
 
 // TODO: C++20 Replace std::vector usages with std::span
 

src/network/room.cpp

@@ -251,7 +251,7 @@ public:
 void Room::RoomImpl::ServerLoop() {
     while (state != State::Closed) {
         ENetEvent event;
-        if (enet_host_service(server, &event, 50) > 0) {
+        if (enet_host_service(server, &event, 16) > 0) {
             switch (event.type) {
             case ENET_EVENT_TYPE_RECEIVE:
                 switch (event.packet->data[0]) {
@@ -599,7 +599,7 @@ bool Room::RoomImpl::HasModPermission(const ENetPeer* client) const {
     if (sending_member == members.end()) {
         return false;
     }
-    if (room_information.enable_citra_mods &&
+    if (room_information.enable_yuzu_mods &&
         sending_member->user_data.moderator) { // Community moderator
 
         return true;
@@ -1014,7 +1014,7 @@ bool Room::Create(const std::string& name, const std::string& description,
                   const u32 max_connections, const std::string& host_username,
                   const std::string& preferred_game, u64 preferred_game_id,
                   std::unique_ptr<VerifyUser::Backend> verify_backend,
-                  const Room::BanList& ban_list, bool enable_citra_mods) {
+                  const Room::BanList& ban_list, bool enable_yuzu_mods) {
     ENetAddress address;
     address.host = ENET_HOST_ANY;
     if (!server_address.empty()) {
@@ -1037,7 +1037,7 @@ bool Room::Create(const std::string& name, const std::string& description,
     room_impl->room_information.preferred_game = preferred_game;
     room_impl->room_information.preferred_game_id = preferred_game_id;
     room_impl->room_information.host_username = host_username;
-    room_impl->room_information.enable_citra_mods = enable_citra_mods;
+    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;

src/network/room.h

@@ -32,7 +32,7 @@ struct RoomInformation {
     std::string preferred_game; ///< Game to advertise that you want to play
     u64 preferred_game_id;      ///< Title ID for the advertised game
     std::string host_username;  ///< Forum username of the host
-    bool enable_citra_mods;     ///< Allow Citra Moderators to moderate on this room
+    bool enable_yuzu_mods;      ///< Allow yuzu Moderators to moderate on this room
 };
 
 struct GameInfo {
@@ -148,7 +148,7 @@ public:
                 const std::string& host_username = "", const std::string& preferred_game = "",
                 u64 preferred_game_id = 0,
                 std::unique_ptr<VerifyUser::Backend> verify_backend = nullptr,
-                const BanList& ban_list = {}, bool enable_citra_mods = false);
+                const BanList& ban_list = {}, bool enable_yuzu_mods = false);
 
     /**
      * Sets the verification GUID of the room.

src/network/room_member.cpp

@@ -86,7 +86,7 @@ public:
      * @params password The password for the room
      * the server to assign one for us.
      */
-    void SendJoinRequest(const std::string& nickname, const std::string& console_id_hash,
+    void SendJoinRequest(const std::string& nickname_, const std::string& console_id_hash,
                          const MacAddress& preferred_mac = NoPreferredMac,
                          const std::string& password = "", const std::string& token = "");
 
@@ -159,7 +159,7 @@ void RoomMember::RoomMemberImpl::MemberLoop() {
     while (IsConnected()) {
         std::lock_guard lock(network_mutex);
         ENetEvent event;
-        if (enet_host_service(client, &event, 100) > 0) {
+        if (enet_host_service(client, &event, 16) > 0) {
             switch (event.type) {
             case ENET_EVENT_TYPE_RECEIVE:
                 switch (event.packet->data[0]) {
@@ -251,16 +251,17 @@ void RoomMember::RoomMemberImpl::MemberLoop() {
                 break;
             }
         }
+        std::list<Packet> packets;
         {
-            std::lock_guard lock(send_list_mutex);
-            for (const auto& packet : send_list) {
-                ENetPacket* enetPacket = enet_packet_create(packet.GetData(), packet.GetDataSize(),
-                                                            ENET_PACKET_FLAG_RELIABLE);
-                enet_peer_send(server, 0, enetPacket);
-            }
-            enet_host_flush(client);
-            send_list.clear();
+            std::lock_guard send_lock(send_list_mutex);
+            packets.swap(send_list);
         }
+        for (const auto& packet : packets) {
+            ENetPacket* enetPacket = enet_packet_create(packet.GetData(), packet.GetDataSize(),
+                                                        ENET_PACKET_FLAG_RELIABLE);
+            enet_peer_send(server, 0, enetPacket);
+        }
+        enet_host_flush(client);
     }
     Disconnect();
 };
@@ -274,14 +275,14 @@ void RoomMember::RoomMemberImpl::Send(Packet&& packet) {
     send_list.push_back(std::move(packet));
 }
 
-void RoomMember::RoomMemberImpl::SendJoinRequest(const std::string& nickname,
+void RoomMember::RoomMemberImpl::SendJoinRequest(const std::string& nickname_,
                                                  const std::string& console_id_hash,
                                                  const MacAddress& preferred_mac,
                                                  const std::string& password,
                                                  const std::string& token) {
     Packet packet;
     packet << static_cast<u8>(IdJoinRequest);
-    packet << nickname;
+    packet << nickname_;
     packet << console_id_hash;
     packet << preferred_mac;
     packet << network_version;

src/network/verify_user.h

@@ -13,7 +13,7 @@ struct UserData {
     std::string username;
     std::string display_name;
     std::string avatar_url;
-    bool moderator = false; ///< Whether the user is a Citra Moderator.
+    bool moderator = false; ///< Whether the user is a yuzu Moderator.
 };
 
 /**

src/tests/CMakeLists.txt

@@ -7,7 +7,7 @@ add_executable(tests
     common/ring_buffer.cpp
     common/unique_function.cpp
     core/core_timing.cpp
-    core/network/network.cpp
+    core/internal_network/network.cpp
     tests.cpp
     video_core/buffer_base.cpp
     input_common/calibration_configuration_job.cpp

src/tests/core/internal_network/network.cpp

@@ -3,8 +3,8 @@
 
 #include <catch2/catch.hpp>
 
-#include "core/network/network.h"
-#include "core/network/sockets.h"
+#include "core/internal_network/network.h"
+#include "core/internal_network/sockets.h"
 
 TEST_CASE("Network::Errors", "[core]") {
     Network::NetworkInstance network_instance; // initialize network

src/web_service/CMakeLists.txt

@@ -1,4 +1,6 @@
 add_library(web_service STATIC
+    announce_room_json.cpp
+    announce_room_json.h
     telemetry_json.cpp
     telemetry_json.h
     verify_login.cpp
@@ -9,4 +11,4 @@ add_library(web_service STATIC
 )
 
 create_target_directory_groups(web_service)
-target_link_libraries(web_service PRIVATE common nlohmann_json::nlohmann_json httplib)
+target_link_libraries(web_service PRIVATE common network nlohmann_json::nlohmann_json httplib)

src/web_service/announce_room_json.cpp

@@ -0,0 +1,157 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <future>
+#include <nlohmann/json.hpp>
+#include "common/detached_tasks.h"
+#include "common/logging/log.h"
+#include "web_service/announce_room_json.h"
+#include "web_service/web_backend.h"
+
+namespace AnnounceMultiplayerRoom {
+
+void to_json(nlohmann::json& json, const Room::Member& member) {
+    if (!member.username.empty()) {
+        json["username"] = member.username;
+    }
+    json["nickname"] = member.nickname;
+    if (!member.avatar_url.empty()) {
+        json["avatarUrl"] = member.avatar_url;
+    }
+    json["gameName"] = member.game_name;
+    json["gameId"] = member.game_id;
+}
+
+void from_json(const nlohmann::json& json, Room::Member& member) {
+    member.nickname = json.at("nickname").get<std::string>();
+    member.game_name = json.at("gameName").get<std::string>();
+    member.game_id = json.at("gameId").get<u64>();
+    try {
+        member.username = json.at("username").get<std::string>();
+        member.avatar_url = json.at("avatarUrl").get<std::string>();
+    } catch (const nlohmann::detail::out_of_range&) {
+        member.username = member.avatar_url = "";
+        LOG_DEBUG(Network, "Member \'{}\' isn't authenticated", member.nickname);
+    }
+}
+
+void to_json(nlohmann::json& json, const Room& room) {
+    json["port"] = room.port;
+    json["name"] = room.name;
+    if (!room.description.empty()) {
+        json["description"] = room.description;
+    }
+    json["preferredGameName"] = room.preferred_game;
+    json["preferredGameId"] = room.preferred_game_id;
+    json["maxPlayers"] = room.max_player;
+    json["netVersion"] = room.net_version;
+    json["hasPassword"] = room.has_password;
+    if (room.members.size() > 0) {
+        nlohmann::json member_json = room.members;
+        json["players"] = member_json;
+    }
+}
+
+void from_json(const nlohmann::json& json, Room& room) {
+    room.verify_UID = json.at("externalGuid").get<std::string>();
+    room.ip = json.at("address").get<std::string>();
+    room.name = json.at("name").get<std::string>();
+    try {
+        room.description = json.at("description").get<std::string>();
+    } catch (const nlohmann::detail::out_of_range&) {
+        room.description = "";
+        LOG_DEBUG(Network, "Room \'{}\' doesn't contain a description", room.name);
+    }
+    room.owner = json.at("owner").get<std::string>();
+    room.port = json.at("port").get<u16>();
+    room.preferred_game = json.at("preferredGameName").get<std::string>();
+    room.preferred_game_id = json.at("preferredGameId").get<u64>();
+    room.max_player = json.at("maxPlayers").get<u32>();
+    room.net_version = json.at("netVersion").get<u32>();
+    room.has_password = json.at("hasPassword").get<bool>();
+    try {
+        room.members = json.at("players").get<std::vector<Room::Member>>();
+    } catch (const nlohmann::detail::out_of_range& e) {
+        LOG_DEBUG(Network, "Out of range {}", e.what());
+    }
+}
+
+} // namespace AnnounceMultiplayerRoom
+
+namespace WebService {
+
+void RoomJson::SetRoomInformation(const std::string& name, const std::string& description,
+                                  const u16 port, const u32 max_player, const u32 net_version,
+                                  const bool has_password, const std::string& preferred_game,
+                                  const u64 preferred_game_id) {
+    room.name = name;
+    room.description = description;
+    room.port = port;
+    room.max_player = max_player;
+    room.net_version = net_version;
+    room.has_password = has_password;
+    room.preferred_game = preferred_game;
+    room.preferred_game_id = preferred_game_id;
+}
+void RoomJson::AddPlayer(const std::string& username_, const std::string& nickname_,
+                         const std::string& avatar_url,
+                         const AnnounceMultiplayerRoom::MacAddress& mac_address, const u64 game_id,
+                         const std::string& game_name) {
+    AnnounceMultiplayerRoom::Room::Member member;
+    member.username = username_;
+    member.nickname = nickname_;
+    member.avatar_url = avatar_url;
+    member.mac_address = mac_address;
+    member.game_id = game_id;
+    member.game_name = game_name;
+    room.members.push_back(member);
+}
+
+WebService::WebResult RoomJson::Update() {
+    if (room_id.empty()) {
+        LOG_ERROR(WebService, "Room must be registered to be updated");
+        return WebService::WebResult{WebService::WebResult::Code::LibError,
+                                     "Room is not registered"};
+    }
+    nlohmann::json json{{"players", room.members}};
+    return client.PostJson(fmt::format("/lobby/{}", room_id), json.dump(), false);
+}
+
+WebService::WebResult RoomJson::Register() {
+    nlohmann::json json = room;
+    auto result = client.PostJson("/lobby", json.dump(), false);
+    if (result.result_code != WebService::WebResult::Code::Success) {
+        return result;
+    }
+    auto reply_json = nlohmann::json::parse(result.returned_data);
+    room = reply_json.get<AnnounceMultiplayerRoom::Room>();
+    room_id = reply_json.at("id").get<std::string>();
+    return WebService::WebResult{WebService::WebResult::Code::Success, "", room.verify_UID};
+}
+
+void RoomJson::ClearPlayers() {
+    room.members.clear();
+}
+
+AnnounceMultiplayerRoom::RoomList RoomJson::GetRoomList() {
+    auto reply = client.GetJson("/lobby", true).returned_data;
+    if (reply.empty()) {
+        return {};
+    }
+    return nlohmann::json::parse(reply).at("rooms").get<AnnounceMultiplayerRoom::RoomList>();
+}
+
+void RoomJson::Delete() {
+    if (room_id.empty()) {
+        LOG_ERROR(WebService, "Room must be registered to be deleted");
+        return;
+    }
+    Common::DetachedTasks::AddTask(
+        [host{this->host}, username{this->username}, token{this->token}, room_id{this->room_id}]() {
+            // create a new client here because the this->client might be destroyed.
+            Client{host, username, token}.DeleteJson(fmt::format("/lobby/{}", room_id), "", false);
+        });
+}
+
+} // namespace WebService

src/web_service/announce_room_json.h

@@ -0,0 +1,46 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <functional>
+#include <string>
+#include "common/announce_multiplayer_room.h"
+#include "web_service/web_backend.h"
+
+namespace WebService {
+
+/**
+ * Implementation of AnnounceMultiplayerRoom::Backend that (de)serializes room information into/from
+ * JSON, and submits/gets it to/from the yuzu web service
+ */
+class RoomJson : public AnnounceMultiplayerRoom::Backend {
+public:
+    RoomJson(const std::string& host, const std::string& username, const std::string& token)
+        : client(host, username, token), host(host), username(username), token(token) {}
+    ~RoomJson() = default;
+    void SetRoomInformation(const std::string& name, const std::string& description, const u16 port,
+                            const u32 max_player, const u32 net_version, const bool has_password,
+                            const std::string& preferred_game,
+                            const u64 preferred_game_id) override;
+    void AddPlayer(const std::string& username_, const std::string& nickname_,
+                   const std::string& avatar_url,
+                   const AnnounceMultiplayerRoom::MacAddress& mac_address, const u64 game_id,
+                   const std::string& game_name) override;
+    WebResult Update() override;
+    WebResult Register() override;
+    void ClearPlayers() override;
+    AnnounceMultiplayerRoom::RoomList GetRoomList() override;
+    void Delete() override;
+
+private:
+    AnnounceMultiplayerRoom::Room room;
+    Client client;
+    std::string host;
+    std::string username;
+    std::string token;
+    std::string room_id;
+};
+
+} // namespace WebService

src/yuzu/CMakeLists.txt

@@ -156,10 +156,36 @@ add_executable(yuzu
     main.cpp
     main.h
     main.ui
+    multiplayer/chat_room.cpp
+    multiplayer/chat_room.h
+    multiplayer/chat_room.ui
+    multiplayer/client_room.h
+    multiplayer/client_room.cpp
+    multiplayer/client_room.ui
+    multiplayer/direct_connect.cpp
+    multiplayer/direct_connect.h
+    multiplayer/direct_connect.ui
+    multiplayer/host_room.cpp
+    multiplayer/host_room.h
+    multiplayer/host_room.ui
+    multiplayer/lobby.cpp
+    multiplayer/lobby.h
+    multiplayer/lobby.ui
+    multiplayer/lobby_p.h
+    multiplayer/message.cpp
+    multiplayer/message.h
+    multiplayer/moderation_dialog.cpp
+    multiplayer/moderation_dialog.h
+    multiplayer/moderation_dialog.ui
+    multiplayer/state.cpp
+    multiplayer/state.h
+    multiplayer/validation.h
     startup_checks.cpp
     startup_checks.h
     uisettings.cpp
     uisettings.h
+    util/clickable_label.cpp
+    util/clickable_label.h
     util/controller_navigation.cpp
     util/controller_navigation.h
     util/limitable_input_dialog.cpp
@@ -256,7 +282,7 @@ endif()
 
 create_target_directory_groups(yuzu)
 
-target_link_libraries(yuzu PRIVATE common core input_common video_core)
+target_link_libraries(yuzu PRIVATE common core input_common network video_core)
 target_link_libraries(yuzu PRIVATE Boost::boost glad Qt::Widgets Qt::Multimedia)
 target_link_libraries(yuzu PRIVATE ${PLATFORM_LIBRARIES} Threads::Threads)
 

src/yuzu/configuration/config.cpp

@@ -11,6 +11,7 @@
 #include "core/hle/service/acc/profile_manager.h"
 #include "core/hle/service/hid/controllers/npad.h"
 #include "input_common/main.h"
+#include "network/network.h"
 #include "yuzu/configuration/config.h"
 
 namespace FS = Common::FS;
@@ -584,6 +585,48 @@ void Config::ReadMiscellaneousValues() {
     qt_config->endGroup();
 }
 
+void Config::ReadMultiplayerValues() {
+    qt_config->beginGroup(QStringLiteral("Multiplayer"));
+
+    UISettings::values.nickname = ReadSetting(QStringLiteral("nickname"), QString{}).toString();
+    UISettings::values.ip = ReadSetting(QStringLiteral("ip"), QString{}).toString();
+    UISettings::values.port =
+        ReadSetting(QStringLiteral("port"), Network::DefaultRoomPort).toString();
+    UISettings::values.room_nickname =
+        ReadSetting(QStringLiteral("room_nickname"), QString{}).toString();
+    UISettings::values.room_name = ReadSetting(QStringLiteral("room_name"), QString{}).toString();
+    UISettings::values.room_port =
+        ReadSetting(QStringLiteral("room_port"), QStringLiteral("24872")).toString();
+    bool ok;
+    UISettings::values.host_type = ReadSetting(QStringLiteral("host_type"), 0).toUInt(&ok);
+    if (!ok) {
+        UISettings::values.host_type = 0;
+    }
+    UISettings::values.max_player = ReadSetting(QStringLiteral("max_player"), 8).toUInt();
+    UISettings::values.game_id = ReadSetting(QStringLiteral("game_id"), 0).toULongLong();
+    UISettings::values.room_description =
+        ReadSetting(QStringLiteral("room_description"), QString{}).toString();
+    // Read ban list back
+    int size = qt_config->beginReadArray(QStringLiteral("username_ban_list"));
+    UISettings::values.ban_list.first.resize(size);
+    for (int i = 0; i < size; ++i) {
+        qt_config->setArrayIndex(i);
+        UISettings::values.ban_list.first[i] =
+            ReadSetting(QStringLiteral("username")).toString().toStdString();
+    }
+    qt_config->endArray();
+    size = qt_config->beginReadArray(QStringLiteral("ip_ban_list"));
+    UISettings::values.ban_list.second.resize(size);
+    for (int i = 0; i < size; ++i) {
+        qt_config->setArrayIndex(i);
+        UISettings::values.ban_list.second[i] =
+            ReadSetting(QStringLiteral("ip")).toString().toStdString();
+    }
+    qt_config->endArray();
+
+    qt_config->endGroup();
+}
+
 void Config::ReadPathValues() {
     qt_config->beginGroup(QStringLiteral("Paths"));
 
@@ -794,6 +837,7 @@ void Config::ReadUIValues() {
     ReadPathValues();
     ReadScreenshotValues();
     ReadShortcutValues();
+    ReadMultiplayerValues();
 
     ReadBasicSetting(UISettings::values.single_window_mode);
     ReadBasicSetting(UISettings::values.fullscreen);
@@ -1161,6 +1205,40 @@ void Config::SaveMiscellaneousValues() {
     qt_config->endGroup();
 }
 
+void Config::SaveMultiplayerValues() {
+    qt_config->beginGroup(QStringLiteral("Multiplayer"));
+
+    WriteSetting(QStringLiteral("nickname"), UISettings::values.nickname, QString{});
+    WriteSetting(QStringLiteral("ip"), UISettings::values.ip, QString{});
+    WriteSetting(QStringLiteral("port"), UISettings::values.port, Network::DefaultRoomPort);
+    WriteSetting(QStringLiteral("room_nickname"), UISettings::values.room_nickname, QString{});
+    WriteSetting(QStringLiteral("room_name"), UISettings::values.room_name, QString{});
+    WriteSetting(QStringLiteral("room_port"), UISettings::values.room_port,
+                 QStringLiteral("24872"));
+    WriteSetting(QStringLiteral("host_type"), UISettings::values.host_type, 0);
+    WriteSetting(QStringLiteral("max_player"), UISettings::values.max_player, 8);
+    WriteSetting(QStringLiteral("game_id"), UISettings::values.game_id, 0);
+    WriteSetting(QStringLiteral("room_description"), UISettings::values.room_description,
+                 QString{});
+    // Write ban list
+    qt_config->beginWriteArray(QStringLiteral("username_ban_list"));
+    for (std::size_t i = 0; i < UISettings::values.ban_list.first.size(); ++i) {
+        qt_config->setArrayIndex(static_cast<int>(i));
+        WriteSetting(QStringLiteral("username"),
+                     QString::fromStdString(UISettings::values.ban_list.first[i]));
+    }
+    qt_config->endArray();
+    qt_config->beginWriteArray(QStringLiteral("ip_ban_list"));
+    for (std::size_t i = 0; i < UISettings::values.ban_list.second.size(); ++i) {
+        qt_config->setArrayIndex(static_cast<int>(i));
+        WriteSetting(QStringLiteral("ip"),
+                     QString::fromStdString(UISettings::values.ban_list.second[i]));
+    }
+    qt_config->endArray();
+
+    qt_config->endGroup();
+}
+
 void Config::SavePathValues() {
     qt_config->beginGroup(QStringLiteral("Paths"));
 
@@ -1347,6 +1425,7 @@ void Config::SaveUIValues() {
     SavePathValues();
     SaveScreenshotValues();
     SaveShortcutValues();
+    SaveMultiplayerValues();
 
     WriteBasicSetting(UISettings::values.single_window_mode);
     WriteBasicSetting(UISettings::values.fullscreen);

src/yuzu/configuration/config.h

@@ -89,6 +89,7 @@ private:
     void ReadUIGamelistValues();
     void ReadUILayoutValues();
     void ReadWebServiceValues();
+    void ReadMultiplayerValues();
 
     void SaveValues();
     void SavePlayerValue(std::size_t player_index);
@@ -118,6 +119,7 @@ private:
     void SaveUIGamelistValues();
     void SaveUILayoutValues();
     void SaveWebServiceValues();
+    void SaveMultiplayerValues();
 
     /**
      * Reads a setting from the qt_config.

src/yuzu/configuration/configure_dialog.cpp

@@ -29,9 +29,10 @@
 
 ConfigureDialog::ConfigureDialog(QWidget* parent, HotkeyRegistry& registry_,
                                  InputCommon::InputSubsystem* input_subsystem,
-                                 Core::System& system_)
-    : QDialog(parent), ui{std::make_unique<Ui::ConfigureDialog>()}, registry{registry_},
-      system{system_}, audio_tab{std::make_unique<ConfigureAudio>(system_, this)},
+                                 Core::System& system_, bool enable_web_config)
+    : QDialog(parent), ui{std::make_unique<Ui::ConfigureDialog>()},
+      registry(registry_), system{system_}, audio_tab{std::make_unique<ConfigureAudio>(system_,
+                                                                                       this)},
       cpu_tab{std::make_unique<ConfigureCpu>(system_, this)},
       debug_tab_tab{std::make_unique<ConfigureDebugTab>(system_, this)},
       filesystem_tab{std::make_unique<ConfigureFilesystem>(this)},
@@ -64,6 +65,7 @@ ConfigureDialog::ConfigureDialog(QWidget* parent, HotkeyRegistry& registry_,
     ui->tabWidget->addTab(ui_tab.get(), tr("Game List"));
     ui->tabWidget->addTab(web_tab.get(), tr("Web"));
 
+    web_tab->SetWebServiceConfigEnabled(enable_web_config);
     hotkeys_tab->Populate(registry);
     setWindowFlags(windowFlags() & ~Qt::WindowContextHelpButtonHint);
 

src/yuzu/configuration/configure_dialog.h

@@ -41,7 +41,8 @@ class ConfigureDialog : public QDialog {
 
 public:
     explicit ConfigureDialog(QWidget* parent, HotkeyRegistry& registry_,
-                             InputCommon::InputSubsystem* input_subsystem, Core::System& system_);
+                             InputCommon::InputSubsystem* input_subsystem, Core::System& system_,
+                             bool enable_web_config = true);
     ~ConfigureDialog() override;
 
     void ApplyConfiguration();

src/yuzu/configuration/configure_network.cpp

@@ -4,7 +4,7 @@
 #include <QtConcurrent/QtConcurrent>
 #include "common/settings.h"
 #include "core/core.h"
-#include "core/network/network_interface.h"
+#include "core/internal_network/network_interface.h"
 #include "ui_configure_network.h"
 #include "yuzu/configuration/configure_network.h"
 

src/yuzu/configuration/configure_web.cpp

@@ -169,3 +169,8 @@ void ConfigureWeb::OnLoginVerified() {
                                  "correctly, and that your internet connection is working."));
     }
 }
+
+void ConfigureWeb::SetWebServiceConfigEnabled(bool enabled) {
+    ui->label_disable_info->setVisible(!enabled);
+    ui->groupBoxWebConfig->setEnabled(enabled);
+}

src/yuzu/configuration/configure_web.h

@@ -20,6 +20,7 @@ public:
     ~ConfigureWeb() override;
 
     void ApplyConfiguration();
+    void SetWebServiceConfigEnabled(bool enabled);
 
 private:
     void changeEvent(QEvent* event) override;

src/yuzu/configuration/configure_web.ui

@@ -112,6 +112,16 @@
        </layout>
       </widget>
      </item>
+     <item>
+      <widget class="QLabel" name="label_disable_info">
+       <property name="text">
+        <string>Web Service configuration can only be changed when a public room isn't being hosted.</string>
+       </property>
+       <property name="wordWrap">
+        <bool>true</bool>
+       </property>
+      </widget>
+     </item>
      <item>
       <widget class="QGroupBox" name="groupBox">
        <property name="title">

src/yuzu/game_list.cpp

@@ -499,6 +499,8 @@ void GameList::DonePopulating(const QStringList& watch_list) {
     }
     item_model->sort(tree_view->header()->sortIndicatorSection(),
                      tree_view->header()->sortIndicatorOrder());
+
+    emit PopulatingCompleted();
 }
 
 void GameList::PopupContextMenu(const QPoint& menu_location) {
@@ -752,6 +754,10 @@ void GameList::LoadCompatibilityList() {
     }
 }
 
+QStandardItemModel* GameList::GetModel() const {
+    return item_model;
+}
+
 void GameList::PopulateAsync(QVector<UISettings::GameDir>& game_dirs) {
     tree_view->setEnabled(false);
 

src/yuzu/game_list.h

@@ -16,9 +16,14 @@
 #include <QWidget>
 
 #include "common/common_types.h"
+#include "core/core.h"
 #include "uisettings.h"
 #include "yuzu/compatibility_list.h"
 
+namespace Core {
+class System;
+}
+
 class ControllerNavigation;
 class GameListWorker;
 class GameListSearchField;
@@ -84,6 +89,8 @@ public:
     void SaveInterfaceLayout();
     void LoadInterfaceLayout();
 
+    QStandardItemModel* GetModel() const;
+
     /// Disables events from the emulated controller
     void UnloadController();
 
@@ -108,6 +115,7 @@ signals:
     void OpenDirectory(const QString& directory);
     void AddDirectory();
     void ShowList(bool show);
+    void PopulatingCompleted();
 
 private slots:
     void OnItemExpanded(const QModelIndex& item);

src/yuzu/main.cpp

@@ -32,6 +32,7 @@
 #include "core/hle/service/am/applet_ae.h"
 #include "core/hle/service/am/applet_oe.h"
 #include "core/hle/service/am/applets/applets.h"
+#include "yuzu/multiplayer/state.h"
 #include "yuzu/util/controller_navigation.h"
 
 // These are wrappers to avoid the calls to CreateDirectory and CreateFile because of the Windows
@@ -132,6 +133,7 @@ static FileSys::VirtualFile VfsDirectoryCreateFileWrapper(const FileSys::Virtual
 #include "yuzu/main.h"
 #include "yuzu/startup_checks.h"
 #include "yuzu/uisettings.h"
+#include "yuzu/util/clickable_label.h"
 
 using namespace Common::Literals;
 
@@ -271,6 +273,8 @@ GMainWindow::GMainWindow(bool has_broken_vulkan)
     SetDiscordEnabled(UISettings::values.enable_discord_presence.GetValue());
     discord_rpc->Update();
 
+    Network::Init();
+
     RegisterMetaTypes();
 
     InitializeWidgets();
@@ -459,6 +463,7 @@ GMainWindow::~GMainWindow() {
     if (render_window->parent() == nullptr) {
         delete render_window;
     }
+    Network::Shutdown();
 }
 
 void GMainWindow::RegisterMetaTypes() {
@@ -822,6 +827,10 @@ void GMainWindow::InitializeWidgets() {
         }
     });
 
+    multiplayer_state = new MultiplayerState(this, game_list->GetModel(), ui->action_Leave_Room,
+                                             ui->action_Show_Room);
+    multiplayer_state->setVisible(false);
+
     // Create status bar
     message_label = new QLabel();
     // Configured separately for left alignment
@@ -854,6 +863,9 @@ void GMainWindow::InitializeWidgets() {
         statusBar()->addPermanentWidget(label);
     }
 
+    statusBar()->addPermanentWidget(multiplayer_state->GetStatusText(), 0);
+    statusBar()->addPermanentWidget(multiplayer_state->GetStatusIcon(), 0);
+
     tas_label = new QLabel();
     tas_label->setObjectName(QStringLiteral("TASlabel"));
     tas_label->setFocusPolicy(Qt::NoFocus);
@@ -1163,6 +1175,8 @@ void GMainWindow::ConnectWidgetEvents() {
     connect(game_list_placeholder, &GameListPlaceholder::AddDirectory, this,
             &GMainWindow::OnGameListAddDirectory);
     connect(game_list, &GameList::ShowList, this, &GMainWindow::OnGameListShowList);
+    connect(game_list, &GameList::PopulatingCompleted,
+            [this] { multiplayer_state->UpdateGameList(game_list->GetModel()); });
 
     connect(game_list, &GameList::OpenPerGameGeneralRequested, this,
             &GMainWindow::OnGameListOpenPerGameProperties);
@@ -1180,6 +1194,9 @@ void GMainWindow::ConnectWidgetEvents() {
     connect(this, &GMainWindow::EmulationStopping, this, &GMainWindow::SoftwareKeyboardExit);
 
     connect(&status_bar_update_timer, &QTimer::timeout, this, &GMainWindow::UpdateStatusBar);
+
+    connect(this, &GMainWindow::UpdateThemedIcons, multiplayer_state,
+            &MultiplayerState::UpdateThemedIcons);
 }
 
 void GMainWindow::ConnectMenuEvents() {
@@ -1223,6 +1240,18 @@ void GMainWindow::ConnectMenuEvents() {
                                             ui->action_Reset_Window_Size_900,
                                             ui->action_Reset_Window_Size_1080});
 
+    // Multiplayer
+    connect(ui->action_View_Lobby, &QAction::triggered, multiplayer_state,
+            &MultiplayerState::OnViewLobby);
+    connect(ui->action_Start_Room, &QAction::triggered, multiplayer_state,
+            &MultiplayerState::OnCreateRoom);
+    connect(ui->action_Leave_Room, &QAction::triggered, multiplayer_state,
+            &MultiplayerState::OnCloseRoom);
+    connect(ui->action_Connect_To_Room, &QAction::triggered, multiplayer_state,
+            &MultiplayerState::OnDirectConnectToRoom);
+    connect(ui->action_Show_Room, &QAction::triggered, multiplayer_state,
+            &MultiplayerState::OnOpenNetworkRoom);
+
     // Tools
     connect_menu(ui->action_Rederive, std::bind(&GMainWindow::OnReinitializeKeys, this,
                                                 ReinitializeKeyBehavior::Warning));
@@ -2783,7 +2812,8 @@ void GMainWindow::OnConfigure() {
     const bool old_discord_presence = UISettings::values.enable_discord_presence.GetValue();
 
     Settings::SetConfiguringGlobal(true);
-    ConfigureDialog configure_dialog(this, hotkey_registry, input_subsystem.get(), *system);
+    ConfigureDialog configure_dialog(this, hotkey_registry, input_subsystem.get(), *system,
+                                     !multiplayer_state->IsHostingPublicRoom());
     connect(&configure_dialog, &ConfigureDialog::LanguageChanged, this,
             &GMainWindow::OnLanguageChanged);
 
@@ -2840,6 +2870,11 @@ void GMainWindow::OnConfigure() {
     if (UISettings::values.enable_discord_presence.GetValue() != old_discord_presence) {
         SetDiscordEnabled(UISettings::values.enable_discord_presence.GetValue());
     }
+
+    if (!multiplayer_state->IsHostingPublicRoom()) {
+        multiplayer_state->UpdateCredentials();
+    }
+
     emit UpdateThemedIcons();
 
     const auto reload = UISettings::values.is_game_list_reload_pending.exchange(false);
@@ -3660,6 +3695,7 @@ void GMainWindow::closeEvent(QCloseEvent* event) {
     }
 
     render_window->close();
+    multiplayer_state->Close();
 
     QWidget::closeEvent(event);
 }
@@ -3856,6 +3892,7 @@ void GMainWindow::OnLanguageChanged(const QString& locale) {
     UISettings::values.language = locale;
     LoadTranslation();
     ui->retranslateUi(this);
+    multiplayer_state->retranslateUi();
     UpdateWindowTitle();
 }
 

src/yuzu/main.h

@@ -11,6 +11,7 @@
 #include <QTimer>
 #include <QTranslator>
 
+#include "common/announce_multiplayer_room.h"
 #include "common/common_types.h"
 #include "yuzu/compatibility_list.h"
 #include "yuzu/hotkeys.h"
@@ -22,6 +23,7 @@
 #endif
 
 class Config;
+class ClickableLabel;
 class EmuThread;
 class GameList;
 class GImageInfo;
@@ -31,6 +33,7 @@ class MicroProfileDialog;
 class ProfilerWidget;
 class ControllerDialog;
 class QLabel;
+class MultiplayerState;
 class QPushButton;
 class QProgressDialog;
 class WaitTreeWidget;
@@ -200,6 +203,8 @@ private:
     void ConnectMenuEvents();
     void UpdateMenuState();
 
+    MultiplayerState* multiplayer_state = nullptr;
+
     void PreventOSSleep();
     void AllowOSSleep();
 

src/yuzu/main.ui

@@ -120,6 +120,20 @@
     <addaction name="menu_Reset_Window_Size"/>
     <addaction name="menu_View_Debugging"/>
    </widget>
+   <widget class="QMenu" name="menu_Multiplayer">
+    <property name="enabled">
+     <bool>true</bool>
+    </property>
+    <property name="title">
+     <string>Multiplayer</string>
+    </property>
+    <addaction name="action_View_Lobby"/>
+    <addaction name="action_Start_Room"/>
+    <addaction name="action_Connect_To_Room"/>
+    <addaction name="separator"/>
+    <addaction name="action_Show_Room"/>
+    <addaction name="action_Leave_Room"/>
+   </widget>
    <widget class="QMenu" name="menu_Tools">
     <property name="title">
      <string>&amp;Tools</string>
@@ -154,6 +168,7 @@
    <addaction name="menu_Emulation"/>
    <addaction name="menu_View"/>
    <addaction name="menu_Tools"/>
+   <addaction name="menu_Multiplayer"/>
    <addaction name="menu_Help"/>
   </widget>
   <action name="action_Install_File_NAND">
@@ -245,6 +260,43 @@
     <string>Show Status Bar</string>
    </property>
   </action>
+  <action name="action_View_Lobby">
+   <property name="enabled">
+    <bool>true</bool>
+   </property>
+   <property name="text">
+    <string>Browse Public Game Lobby</string>
+   </property>
+  </action>
+  <action name="action_Start_Room">
+   <property name="enabled">
+    <bool>true</bool>
+   </property>
+   <property name="text">
+    <string>Create Room</string>
+   </property>
+  </action>
+  <action name="action_Leave_Room">
+   <property name="enabled">
+    <bool>false</bool>
+   </property>
+   <property name="text">
+    <string>Leave Room</string>
+   </property>
+  </action>
+  <action name="action_Connect_To_Room">
+   <property name="text">
+    <string>Direct Connect to Room</string>
+   </property>
+  </action>
+  <action name="action_Show_Room">
+   <property name="enabled">
+    <bool>false</bool>
+   </property>
+   <property name="text">
+    <string>Show Current Room</string>
+   </property>
+  </action>
   <action name="action_Fullscreen">
    <property name="checkable">
     <bool>true</bool>

src/yuzu/multiplayer/chat_room.cpp

@@ -0,0 +1,490 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <array>
+#include <future>
+#include <QColor>
+#include <QDesktopServices>
+#include <QFutureWatcher>
+#include <QImage>
+#include <QList>
+#include <QLocale>
+#include <QMenu>
+#include <QMessageBox>
+#include <QMetaType>
+#include <QTime>
+#include <QUrl>
+#include <QtConcurrent/QtConcurrentRun>
+#include "common/logging/log.h"
+#include "core/announce_multiplayer_session.h"
+#include "ui_chat_room.h"
+#include "yuzu/game_list_p.h"
+#include "yuzu/multiplayer/chat_room.h"
+#include "yuzu/multiplayer/message.h"
+#ifdef ENABLE_WEB_SERVICE
+#include "web_service/web_backend.h"
+#endif
+
+class ChatMessage {
+public:
+    explicit ChatMessage(const Network::ChatEntry& chat, QTime ts = {}) {
+        /// Convert the time to their default locale defined format
+        QLocale locale;
+        timestamp = locale.toString(ts.isValid() ? ts : QTime::currentTime(), QLocale::ShortFormat);
+        nickname = QString::fromStdString(chat.nickname);
+        username = QString::fromStdString(chat.username);
+        message = QString::fromStdString(chat.message);
+
+        // Check for user pings
+        QString cur_nickname, cur_username;
+        if (auto room = Network::GetRoomMember().lock()) {
+            cur_nickname = QString::fromStdString(room->GetNickname());
+            cur_username = QString::fromStdString(room->GetUsername());
+        }
+
+        // Handle pings at the beginning and end of message
+        QString fixed_message = QStringLiteral(" %1 ").arg(message);
+        if (fixed_message.contains(QStringLiteral(" @%1 ").arg(cur_nickname)) ||
+            (!cur_username.isEmpty() &&
+             fixed_message.contains(QStringLiteral(" @%1 ").arg(cur_username)))) {
+
+            contains_ping = true;
+        } else {
+            contains_ping = false;
+        }
+    }
+
+    bool ContainsPing() const {
+        return contains_ping;
+    }
+
+    /// Format the message using the players color
+    QString GetPlayerChatMessage(u16 player) const {
+        auto color = player_color[player % 16];
+        QString name;
+        if (username.isEmpty() || username == nickname) {
+            name = nickname;
+        } else {
+            name = QStringLiteral("%1 (%2)").arg(nickname, username);
+        }
+
+        QString style, text_color;
+        if (ContainsPing()) {
+            // Add a background color to these messages
+            style = QStringLiteral("background-color: %1").arg(QString::fromStdString(ping_color));
+            // Add a font color
+            text_color = QStringLiteral("color='#000000'");
+        }
+
+        return QStringLiteral("[%1] <font color='%2'>&lt;%3&gt;</font> <font style='%4' "
+                              "%5>%6</font>")
+            .arg(timestamp, QString::fromStdString(color), name.toHtmlEscaped(), style, text_color,
+                 message.toHtmlEscaped());
+    }
+
+private:
+    static constexpr std::array<const char*, 16> player_color = {
+        {"#0000FF", "#FF0000", "#8A2BE2", "#FF69B4", "#1E90FF", "#008000", "#00FF7F", "#B22222",
+         "#DAA520", "#FF4500", "#2E8B57", "#5F9EA0", "#D2691E", "#9ACD32", "#FF7F50", "FFFF00"}};
+    static constexpr char ping_color[] = "#FFFF00";
+
+    QString timestamp;
+    QString nickname;
+    QString username;
+    QString message;
+    bool contains_ping;
+};
+
+class StatusMessage {
+public:
+    explicit StatusMessage(const QString& msg, QTime ts = {}) {
+        /// Convert the time to their default locale defined format
+        QLocale locale;
+        timestamp = locale.toString(ts.isValid() ? ts : QTime::currentTime(), QLocale::ShortFormat);
+        message = msg;
+    }
+
+    QString GetSystemChatMessage() const {
+        return QStringLiteral("[%1] <font color='%2'>* %3</font>")
+            .arg(timestamp, QString::fromStdString(system_color), message);
+    }
+
+private:
+    static constexpr const char system_color[] = "#FF8C00";
+    QString timestamp;
+    QString message;
+};
+
+class PlayerListItem : public QStandardItem {
+public:
+    static const int NicknameRole = Qt::UserRole + 1;
+    static const int UsernameRole = Qt::UserRole + 2;
+    static const int AvatarUrlRole = Qt::UserRole + 3;
+    static const int GameNameRole = Qt::UserRole + 4;
+
+    PlayerListItem() = default;
+    explicit PlayerListItem(const std::string& nickname, const std::string& username,
+                            const std::string& avatar_url, const std::string& game_name) {
+        setEditable(false);
+        setData(QString::fromStdString(nickname), NicknameRole);
+        setData(QString::fromStdString(username), UsernameRole);
+        setData(QString::fromStdString(avatar_url), AvatarUrlRole);
+        if (game_name.empty()) {
+            setData(QObject::tr("Not playing a game"), GameNameRole);
+        } else {
+            setData(QString::fromStdString(game_name), GameNameRole);
+        }
+    }
+
+    QVariant data(int role) const override {
+        if (role != Qt::DisplayRole) {
+            return QStandardItem::data(role);
+        }
+        QString name;
+        const QString nickname = data(NicknameRole).toString();
+        const QString username = data(UsernameRole).toString();
+        if (username.isEmpty() || username == nickname) {
+            name = nickname;
+        } else {
+            name = QStringLiteral("%1 (%2)").arg(nickname, username);
+        }
+        return QStringLiteral("%1\n      %2").arg(name, data(GameNameRole).toString());
+    }
+};
+
+ChatRoom::ChatRoom(QWidget* parent) : QWidget(parent), ui(std::make_unique<Ui::ChatRoom>()) {
+    ui->setupUi(this);
+
+    // set the item_model for player_view
+
+    player_list = new QStandardItemModel(ui->player_view);
+    ui->player_view->setModel(player_list);
+    ui->player_view->setContextMenuPolicy(Qt::CustomContextMenu);
+    // set a header to make it look better though there is only one column
+    player_list->insertColumns(0, 1);
+    player_list->setHeaderData(0, Qt::Horizontal, tr("Members"));
+
+    ui->chat_history->document()->setMaximumBlockCount(max_chat_lines);
+
+    // register the network structs to use in slots and signals
+    qRegisterMetaType<Network::ChatEntry>();
+    qRegisterMetaType<Network::StatusMessageEntry>();
+    qRegisterMetaType<Network::RoomInformation>();
+    qRegisterMetaType<Network::RoomMember::State>();
+
+    // setup the callbacks for network updates
+    if (auto member = Network::GetRoomMember().lock()) {
+        member->BindOnChatMessageRecieved(
+            [this](const Network::ChatEntry& chat) { emit ChatReceived(chat); });
+        member->BindOnStatusMessageReceived(
+            [this](const Network::StatusMessageEntry& status_message) {
+                emit StatusMessageReceived(status_message);
+            });
+        connect(this, &ChatRoom::ChatReceived, this, &ChatRoom::OnChatReceive);
+        connect(this, &ChatRoom::StatusMessageReceived, this, &ChatRoom::OnStatusMessageReceive);
+    } else {
+        // TODO (jroweboy) network was not initialized?
+    }
+
+    // Connect all the widgets to the appropriate events
+    connect(ui->player_view, &QTreeView::customContextMenuRequested, this,
+            &ChatRoom::PopupContextMenu);
+    connect(ui->chat_message, &QLineEdit::returnPressed, this, &ChatRoom::OnSendChat);
+    connect(ui->chat_message, &QLineEdit::textChanged, this, &ChatRoom::OnChatTextChanged);
+    connect(ui->send_message, &QPushButton::clicked, this, &ChatRoom::OnSendChat);
+}
+
+ChatRoom::~ChatRoom() = default;
+
+void ChatRoom::SetModPerms(bool is_mod) {
+    has_mod_perms = is_mod;
+}
+
+void ChatRoom::RetranslateUi() {
+    ui->retranslateUi(this);
+}
+
+void ChatRoom::Clear() {
+    ui->chat_history->clear();
+    block_list.clear();
+}
+
+void ChatRoom::AppendStatusMessage(const QString& msg) {
+    ui->chat_history->append(StatusMessage(msg).GetSystemChatMessage());
+}
+
+void ChatRoom::AppendChatMessage(const QString& msg) {
+    ui->chat_history->append(msg);
+}
+
+void ChatRoom::SendModerationRequest(Network::RoomMessageTypes type, const std::string& nickname) {
+    if (auto room = Network::GetRoomMember().lock()) {
+        auto members = room->GetMemberInformation();
+        auto it = std::find_if(members.begin(), members.end(),
+                               [&nickname](const Network::RoomMember::MemberInformation& member) {
+                                   return member.nickname == nickname;
+                               });
+        if (it == members.end()) {
+            NetworkMessage::ErrorManager::ShowError(NetworkMessage::ErrorManager::NO_SUCH_USER);
+            return;
+        }
+        room->SendModerationRequest(type, nickname);
+    }
+}
+
+bool ChatRoom::ValidateMessage(const std::string& msg) {
+    return !msg.empty();
+}
+
+void ChatRoom::OnRoomUpdate(const Network::RoomInformation& info) {
+    // TODO(B3N30): change title
+    if (auto room_member = Network::GetRoomMember().lock()) {
+        SetPlayerList(room_member->GetMemberInformation());
+    }
+}
+
+void ChatRoom::Disable() {
+    ui->send_message->setDisabled(true);
+    ui->chat_message->setDisabled(true);
+}
+
+void ChatRoom::Enable() {
+    ui->send_message->setEnabled(true);
+    ui->chat_message->setEnabled(true);
+}
+
+void ChatRoom::OnChatReceive(const Network::ChatEntry& chat) {
+    if (!ValidateMessage(chat.message)) {
+        return;
+    }
+    if (auto room = Network::GetRoomMember().lock()) {
+        // get the id of the player
+        auto members = room->GetMemberInformation();
+        auto it = std::find_if(members.begin(), members.end(),
+                               [&chat](const Network::RoomMember::MemberInformation& member) {
+                                   return member.nickname == chat.nickname &&
+                                          member.username == chat.username;
+                               });
+        if (it == members.end()) {
+            LOG_INFO(Network, "Chat message received from unknown player. Ignoring it.");
+            return;
+        }
+        if (block_list.count(chat.nickname)) {
+            LOG_INFO(Network, "Chat message received from blocked player {}. Ignoring it.",
+                     chat.nickname);
+            return;
+        }
+        auto player = std::distance(members.begin(), it);
+        ChatMessage m(chat);
+        if (m.ContainsPing()) {
+            emit UserPinged();
+        }
+        AppendChatMessage(m.GetPlayerChatMessage(player));
+    }
+}
+
+void ChatRoom::OnStatusMessageReceive(const Network::StatusMessageEntry& status_message) {
+    QString name;
+    if (status_message.username.empty() || status_message.username == status_message.nickname) {
+        name = QString::fromStdString(status_message.nickname);
+    } else {
+        name = QStringLiteral("%1 (%2)").arg(QString::fromStdString(status_message.nickname),
+                                             QString::fromStdString(status_message.username));
+    }
+    QString message;
+    switch (status_message.type) {
+    case Network::IdMemberJoin:
+        message = tr("%1 has joined").arg(name);
+        break;
+    case Network::IdMemberLeave:
+        message = tr("%1 has left").arg(name);
+        break;
+    case Network::IdMemberKicked:
+        message = tr("%1 has been kicked").arg(name);
+        break;
+    case Network::IdMemberBanned:
+        message = tr("%1 has been banned").arg(name);
+        break;
+    case Network::IdAddressUnbanned:
+        message = tr("%1 has been unbanned").arg(name);
+        break;
+    }
+    if (!message.isEmpty())
+        AppendStatusMessage(message);
+}
+
+void ChatRoom::OnSendChat() {
+    if (auto room = Network::GetRoomMember().lock()) {
+        if (room->GetState() != Network::RoomMember::State::Joined &&
+            room->GetState() != Network::RoomMember::State::Moderator) {
+
+            return;
+        }
+        auto message = ui->chat_message->text().toStdString();
+        if (!ValidateMessage(message)) {
+            return;
+        }
+        auto nick = room->GetNickname();
+        auto username = room->GetUsername();
+        Network::ChatEntry chat{nick, username, message};
+
+        auto members = room->GetMemberInformation();
+        auto it = std::find_if(members.begin(), members.end(),
+                               [&chat](const Network::RoomMember::MemberInformation& member) {
+                                   return member.nickname == chat.nickname &&
+                                          member.username == chat.username;
+                               });
+        if (it == members.end()) {
+            LOG_INFO(Network, "Cannot find self in the player list when sending a message.");
+        }
+        auto player = std::distance(members.begin(), it);
+        ChatMessage m(chat);
+        room->SendChatMessage(message);
+        AppendChatMessage(m.GetPlayerChatMessage(player));
+        ui->chat_message->clear();
+    }
+}
+
+void ChatRoom::UpdateIconDisplay() {
+    for (int row = 0; row < player_list->invisibleRootItem()->rowCount(); ++row) {
+        QStandardItem* item = player_list->invisibleRootItem()->child(row);
+        const std::string avatar_url =
+            item->data(PlayerListItem::AvatarUrlRole).toString().toStdString();
+        if (icon_cache.count(avatar_url)) {
+            item->setData(icon_cache.at(avatar_url), Qt::DecorationRole);
+        } else {
+            item->setData(QIcon::fromTheme(QStringLiteral("no_avatar")).pixmap(48),
+                          Qt::DecorationRole);
+        }
+    }
+}
+
+void ChatRoom::SetPlayerList(const Network::RoomMember::MemberList& member_list) {
+    // TODO(B3N30): Remember which row is selected
+    player_list->removeRows(0, player_list->rowCount());
+    for (const auto& member : member_list) {
+        if (member.nickname.empty())
+            continue;
+        QStandardItem* name_item = new PlayerListItem(member.nickname, member.username,
+                                                      member.avatar_url, member.game_info.name);
+
+#ifdef ENABLE_WEB_SERVICE
+        if (!icon_cache.count(member.avatar_url) && !member.avatar_url.empty()) {
+            // Start a request to get the member's avatar
+            const QUrl url(QString::fromStdString(member.avatar_url));
+            QFuture<std::string> future = QtConcurrent::run([url] {
+                WebService::Client client(
+                    QStringLiteral("%1://%2").arg(url.scheme(), url.host()).toStdString(), "", "");
+                auto result = client.GetImage(url.path().toStdString(), true);
+                if (result.returned_data.empty()) {
+                    LOG_ERROR(WebService, "Failed to get avatar");
+                }
+                return result.returned_data;
+            });
+            auto* future_watcher = new QFutureWatcher<std::string>(this);
+            connect(future_watcher, &QFutureWatcher<std::string>::finished, this,
+                    [this, future_watcher, avatar_url = member.avatar_url] {
+                        const std::string result = future_watcher->result();
+                        if (result.empty())
+                            return;
+                        QPixmap pixmap;
+                        if (!pixmap.loadFromData(reinterpret_cast<const u8*>(result.data()),
+                                                 result.size()))
+                            return;
+                        icon_cache[avatar_url] =
+                            pixmap.scaled(48, 48, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
+                        // Update all the displayed icons with the new icon_cache
+                        UpdateIconDisplay();
+                    });
+            future_watcher->setFuture(future);
+        }
+#endif
+
+        player_list->invisibleRootItem()->appendRow(name_item);
+    }
+    UpdateIconDisplay();
+    // TODO(B3N30): Restore row selection
+}
+
+void ChatRoom::OnChatTextChanged() {
+    if (ui->chat_message->text().length() > static_cast<int>(Network::MaxMessageSize))
+        ui->chat_message->setText(
+            ui->chat_message->text().left(static_cast<int>(Network::MaxMessageSize)));
+}
+
+void ChatRoom::PopupContextMenu(const QPoint& menu_location) {
+    QModelIndex item = ui->player_view->indexAt(menu_location);
+    if (!item.isValid())
+        return;
+
+    std::string nickname =
+        player_list->item(item.row())->data(PlayerListItem::NicknameRole).toString().toStdString();
+
+    QMenu context_menu;
+
+    QString username = player_list->item(item.row())->data(PlayerListItem::UsernameRole).toString();
+    if (!username.isEmpty()) {
+        QAction* view_profile_action = context_menu.addAction(tr("View Profile"));
+        connect(view_profile_action, &QAction::triggered, [username] {
+            QDesktopServices::openUrl(
+                QUrl(QStringLiteral("https://community.citra-emu.org/u/%1").arg(username)));
+        });
+    }
+
+    std::string cur_nickname;
+    if (auto room = Network::GetRoomMember().lock()) {
+        cur_nickname = room->GetNickname();
+    }
+
+    if (nickname != cur_nickname) { // You can't block yourself
+        QAction* block_action = context_menu.addAction(tr("Block Player"));
+
+        block_action->setCheckable(true);
+        block_action->setChecked(block_list.count(nickname) > 0);
+
+        connect(block_action, &QAction::triggered, [this, nickname] {
+            if (block_list.count(nickname)) {
+                block_list.erase(nickname);
+            } else {
+                QMessageBox::StandardButton result = QMessageBox::question(
+                    this, tr("Block Player"),
+                    tr("When you block a player, you will no longer receive chat messages from "
+                       "them.<br><br>Are you sure you would like to block %1?")
+                        .arg(QString::fromStdString(nickname)),
+                    QMessageBox::Yes | QMessageBox::No);
+                if (result == QMessageBox::Yes)
+                    block_list.emplace(nickname);
+            }
+        });
+    }
+
+    if (has_mod_perms && nickname != cur_nickname) { // You can't kick or ban yourself
+        context_menu.addSeparator();
+
+        QAction* kick_action = context_menu.addAction(tr("Kick"));
+        QAction* ban_action = context_menu.addAction(tr("Ban"));
+
+        connect(kick_action, &QAction::triggered, [this, nickname] {
+            QMessageBox::StandardButton result =
+                QMessageBox::question(this, tr("Kick Player"),
+                                      tr("Are you sure you would like to <b>kick</b> %1?")
+                                          .arg(QString::fromStdString(nickname)),
+                                      QMessageBox::Yes | QMessageBox::No);
+            if (result == QMessageBox::Yes)
+                SendModerationRequest(Network::IdModKick, nickname);
+        });
+        connect(ban_action, &QAction::triggered, [this, nickname] {
+            QMessageBox::StandardButton result = QMessageBox::question(
+                this, tr("Ban Player"),
+                tr("Are you sure you would like to <b>kick and ban</b> %1?\n\nThis would "
+                   "ban both their forum username and their IP address.")
+                    .arg(QString::fromStdString(nickname)),
+                QMessageBox::Yes | QMessageBox::No);
+            if (result == QMessageBox::Yes)
+                SendModerationRequest(Network::IdModBan, nickname);
+        });
+    }
+
+    context_menu.exec(ui->player_view->viewport()->mapToGlobal(menu_location));
+}

src/yuzu/multiplayer/chat_room.h

@@ -0,0 +1,74 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <unordered_set>
+#include <QDialog>
+#include <QSortFilterProxyModel>
+#include <QStandardItemModel>
+#include <QVariant>
+#include "network/network.h"
+
+namespace Ui {
+class ChatRoom;
+}
+
+namespace Core {
+class AnnounceMultiplayerSession;
+}
+
+class ConnectionError;
+class ComboBoxProxyModel;
+
+class ChatMessage;
+
+class ChatRoom : public QWidget {
+    Q_OBJECT
+
+public:
+    explicit ChatRoom(QWidget* parent);
+    void RetranslateUi();
+    void SetPlayerList(const Network::RoomMember::MemberList& member_list);
+    void Clear();
+    void AppendStatusMessage(const QString& msg);
+    ~ChatRoom();
+
+    void SetModPerms(bool is_mod);
+    void UpdateIconDisplay();
+
+public slots:
+    void OnRoomUpdate(const Network::RoomInformation& info);
+    void OnChatReceive(const Network::ChatEntry&);
+    void OnStatusMessageReceive(const Network::StatusMessageEntry&);
+    void OnSendChat();
+    void OnChatTextChanged();
+    void PopupContextMenu(const QPoint& menu_location);
+    void Disable();
+    void Enable();
+
+signals:
+    void ChatReceived(const Network::ChatEntry&);
+    void StatusMessageReceived(const Network::StatusMessageEntry&);
+    void UserPinged();
+
+private:
+    static constexpr u32 max_chat_lines = 1000;
+    void AppendChatMessage(const QString&);
+    bool ValidateMessage(const std::string&);
+    void SendModerationRequest(Network::RoomMessageTypes type, const std::string& nickname);
+
+    bool has_mod_perms = false;
+    QStandardItemModel* player_list;
+    std::unique_ptr<Ui::ChatRoom> ui;
+    std::unordered_set<std::string> block_list;
+    std::unordered_map<std::string, QPixmap> icon_cache;
+};
+
+Q_DECLARE_METATYPE(Network::ChatEntry);
+Q_DECLARE_METATYPE(Network::StatusMessageEntry);
+Q_DECLARE_METATYPE(Network::RoomInformation);
+Q_DECLARE_METATYPE(Network::RoomMember::State);
+Q_DECLARE_METATYPE(Network::RoomMember::Error);

src/yuzu/multiplayer/chat_room.ui

@@ -0,0 +1,59 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>ChatRoom</class>
+ <widget class="QWidget" name="ChatRoom">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>807</width>
+    <height>432</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Room Window</string>
+  </property>
+  <layout class="QHBoxLayout" name="horizontalLayout">
+   <item>
+    <widget class="QTreeView" name="player_view"/>
+   </item>
+   <item>
+    <layout class="QVBoxLayout" name="verticalLayout_4">
+     <item>
+      <widget class="QTextEdit" name="chat_history">
+       <property name="undoRedoEnabled">
+        <bool>false</bool>
+       </property>
+       <property name="readOnly">
+        <bool>true</bool>
+       </property>
+       <property name="textInteractionFlags">
+        <set>Qt::TextSelectableByKeyboard|Qt::TextSelectableByMouse</set>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <layout class="QHBoxLayout" name="horizontalLayout_3">
+       <item>
+        <widget class="QLineEdit" name="chat_message">
+         <property name="placeholderText">
+          <string>Send Chat Message</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="send_message">
+         <property name="text">
+          <string>Send Message</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+    </layout>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

src/yuzu/multiplayer/client_room.cpp

@@ -0,0 +1,115 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <future>
+#include <QColor>
+#include <QImage>
+#include <QList>
+#include <QLocale>
+#include <QMetaType>
+#include <QTime>
+#include <QtConcurrent/QtConcurrentRun>
+#include "common/logging/log.h"
+#include "core/announce_multiplayer_session.h"
+#include "ui_client_room.h"
+#include "yuzu/game_list_p.h"
+#include "yuzu/multiplayer/client_room.h"
+#include "yuzu/multiplayer/message.h"
+#include "yuzu/multiplayer/moderation_dialog.h"
+#include "yuzu/multiplayer/state.h"
+
+ClientRoomWindow::ClientRoomWindow(QWidget* parent)
+    : QDialog(parent, Qt::WindowTitleHint | Qt::WindowCloseButtonHint | Qt::WindowSystemMenuHint),
+      ui(std::make_unique<Ui::ClientRoom>()) {
+    ui->setupUi(this);
+
+    // setup the callbacks for network updates
+    if (auto member = Network::GetRoomMember().lock()) {
+        member->BindOnRoomInformationChanged(
+            [this](const Network::RoomInformation& info) { emit RoomInformationChanged(info); });
+        member->BindOnStateChanged(
+            [this](const Network::RoomMember::State& state) { emit StateChanged(state); });
+
+        connect(this, &ClientRoomWindow::RoomInformationChanged, this,
+                &ClientRoomWindow::OnRoomUpdate);
+        connect(this, &ClientRoomWindow::StateChanged, this, &::ClientRoomWindow::OnStateChange);
+        // Update the state
+        OnStateChange(member->GetState());
+    } else {
+        // TODO (jroweboy) network was not initialized?
+    }
+
+    connect(ui->disconnect, &QPushButton::clicked, this, &ClientRoomWindow::Disconnect);
+    ui->disconnect->setDefault(false);
+    ui->disconnect->setAutoDefault(false);
+    connect(ui->moderation, &QPushButton::clicked, [this] {
+        ModerationDialog dialog(this);
+        dialog.exec();
+    });
+    ui->moderation->setDefault(false);
+    ui->moderation->setAutoDefault(false);
+    connect(ui->chat, &ChatRoom::UserPinged, this, &ClientRoomWindow::ShowNotification);
+    UpdateView();
+}
+
+ClientRoomWindow::~ClientRoomWindow() = default;
+
+void ClientRoomWindow::SetModPerms(bool is_mod) {
+    ui->chat->SetModPerms(is_mod);
+    ui->moderation->setVisible(is_mod);
+    ui->moderation->setDefault(false);
+    ui->moderation->setAutoDefault(false);
+}
+
+void ClientRoomWindow::RetranslateUi() {
+    ui->retranslateUi(this);
+    ui->chat->RetranslateUi();
+}
+
+void ClientRoomWindow::OnRoomUpdate(const Network::RoomInformation& info) {
+    UpdateView();
+}
+
+void ClientRoomWindow::OnStateChange(const Network::RoomMember::State& state) {
+    if (state == Network::RoomMember::State::Joined ||
+        state == Network::RoomMember::State::Moderator) {
+
+        ui->chat->Clear();
+        ui->chat->AppendStatusMessage(tr("Connected"));
+        SetModPerms(state == Network::RoomMember::State::Moderator);
+    }
+    UpdateView();
+}
+
+void ClientRoomWindow::Disconnect() {
+    auto parent = static_cast<MultiplayerState*>(parentWidget());
+    if (parent->OnCloseRoom()) {
+        ui->chat->AppendStatusMessage(tr("Disconnected"));
+        close();
+    }
+}
+
+void ClientRoomWindow::UpdateView() {
+    if (auto member = Network::GetRoomMember().lock()) {
+        if (member->IsConnected()) {
+            ui->chat->Enable();
+            ui->disconnect->setEnabled(true);
+            auto memberlist = member->GetMemberInformation();
+            ui->chat->SetPlayerList(memberlist);
+            const auto information = member->GetRoomInformation();
+            setWindowTitle(QString(tr("%1 (%2/%3 members) - connected"))
+                               .arg(QString::fromStdString(information.name))
+                               .arg(memberlist.size())
+                               .arg(information.member_slots));
+            ui->description->setText(QString::fromStdString(information.description));
+            return;
+        }
+    }
+    // TODO(B3N30): can't get RoomMember*, show error and close window
+    close();
+}
+
+void ClientRoomWindow::UpdateIconDisplay() {
+    ui->chat->UpdateIconDisplay();
+}

src/yuzu/multiplayer/client_room.h

@@ -0,0 +1,39 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include "yuzu/multiplayer/chat_room.h"
+
+namespace Ui {
+class ClientRoom;
+}
+
+class ClientRoomWindow : public QDialog {
+    Q_OBJECT
+
+public:
+    explicit ClientRoomWindow(QWidget* parent);
+    ~ClientRoomWindow();
+
+    void RetranslateUi();
+    void UpdateIconDisplay();
+
+public slots:
+    void OnRoomUpdate(const Network::RoomInformation&);
+    void OnStateChange(const Network::RoomMember::State&);
+
+signals:
+    void RoomInformationChanged(const Network::RoomInformation&);
+    void StateChanged(const Network::RoomMember::State&);
+    void ShowNotification();
+
+private:
+    void Disconnect();
+    void UpdateView();
+    void SetModPerms(bool is_mod);
+
+    QStandardItemModel* player_list;
+    std::unique_ptr<Ui::ClientRoom> ui;
+};

src/yuzu/multiplayer/client_room.ui

@@ -0,0 +1,80 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>ClientRoom</class>
+ <widget class="QWidget" name="ClientRoom">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>807</width>
+    <height>432</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Room Window</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <layout class="QVBoxLayout" name="verticalLayout_3">
+     <item>
+      <layout class="QHBoxLayout" name="horizontalLayout">
+       <property name="rightMargin">
+        <number>0</number>
+       </property>
+       <item>
+        <widget class="QLabel" name="description">
+         <property name="text">
+          <string>Room Description</string>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <spacer name="horizontalSpacer">
+         <property name="orientation">
+          <enum>Qt::Horizontal</enum>
+         </property>
+         <property name="sizeHint" stdset="0">
+          <size>
+           <width>40</width>
+           <height>20</height>
+          </size>
+         </property>
+        </spacer>
+       </item>
+       <item>
+        <widget class="QPushButton" name="moderation">
+         <property name="text">
+          <string>Moderation...</string>
+         </property>
+         <property name="visible">
+          <bool>false</bool>
+         </property>
+        </widget>
+       </item>
+       <item>
+        <widget class="QPushButton" name="disconnect">
+         <property name="text">
+          <string>Leave Room</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+     <item>
+      <widget class="ChatRoom" name="chat" native="true"/>
+     </item>
+    </layout>
+   </item>
+  </layout>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>ChatRoom</class>
+   <extends>QWidget</extends>
+   <header>multiplayer/chat_room.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
+ <resources/>
+ <connections/>
+</ui>

src/yuzu/multiplayer/direct_connect.cpp

@@ -0,0 +1,129 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <QComboBox>
+#include <QFuture>
+#include <QIntValidator>
+#include <QRegExpValidator>
+#include <QString>
+#include <QtConcurrent/QtConcurrentRun>
+#include "common/settings.h"
+#include "network/network.h"
+#include "ui_direct_connect.h"
+#include "yuzu/main.h"
+#include "yuzu/multiplayer/client_room.h"
+#include "yuzu/multiplayer/direct_connect.h"
+#include "yuzu/multiplayer/message.h"
+#include "yuzu/multiplayer/state.h"
+#include "yuzu/multiplayer/validation.h"
+#include "yuzu/uisettings.h"
+
+enum class ConnectionType : u8 { TraversalServer, IP };
+
+DirectConnectWindow::DirectConnectWindow(QWidget* parent)
+    : QDialog(parent, Qt::WindowTitleHint | Qt::WindowCloseButtonHint | Qt::WindowSystemMenuHint),
+      ui(std::make_unique<Ui::DirectConnect>()) {
+
+    ui->setupUi(this);
+
+    // setup the watcher for background connections
+    watcher = new QFutureWatcher<void>;
+    connect(watcher, &QFutureWatcher<void>::finished, this, &DirectConnectWindow::OnConnection);
+
+    ui->nickname->setValidator(validation.GetNickname());
+    ui->nickname->setText(UISettings::values.nickname);
+    if (ui->nickname->text().isEmpty() && !Settings::values.yuzu_username.GetValue().empty()) {
+        // Use yuzu Web Service user name as nickname by default
+        ui->nickname->setText(QString::fromStdString(Settings::values.yuzu_username.GetValue()));
+    }
+    ui->ip->setValidator(validation.GetIP());
+    ui->ip->setText(UISettings::values.ip);
+    ui->port->setValidator(validation.GetPort());
+    ui->port->setText(UISettings::values.port);
+
+    // TODO(jroweboy): Show or hide the connection options based on the current value of the combo
+    // box. Add this back in when the traversal server support is added.
+    connect(ui->connect, &QPushButton::clicked, this, &DirectConnectWindow::Connect);
+}
+
+DirectConnectWindow::~DirectConnectWindow() = default;
+
+void DirectConnectWindow::RetranslateUi() {
+    ui->retranslateUi(this);
+}
+
+void DirectConnectWindow::Connect() {
+    if (!ui->nickname->hasAcceptableInput()) {
+        NetworkMessage::ErrorManager::ShowError(NetworkMessage::ErrorManager::USERNAME_NOT_VALID);
+        return;
+    }
+    if (const auto member = Network::GetRoomMember().lock()) {
+        // Prevent the user from trying to join a room while they are already joining.
+        if (member->GetState() == Network::RoomMember::State::Joining) {
+            return;
+        } else if (member->IsConnected()) {
+            // And ask if they want to leave the room if they are already in one.
+            if (!NetworkMessage::WarnDisconnect()) {
+                return;
+            }
+        }
+    }
+    switch (static_cast<ConnectionType>(ui->connection_type->currentIndex())) {
+    case ConnectionType::TraversalServer:
+        break;
+    case ConnectionType::IP:
+        if (!ui->ip->hasAcceptableInput()) {
+            NetworkMessage::ErrorManager::ShowError(
+                NetworkMessage::ErrorManager::IP_ADDRESS_NOT_VALID);
+            return;
+        }
+        if (!ui->port->hasAcceptableInput()) {
+            NetworkMessage::ErrorManager::ShowError(NetworkMessage::ErrorManager::PORT_NOT_VALID);
+            return;
+        }
+        break;
+    }
+
+    // Store settings
+    UISettings::values.nickname = ui->nickname->text();
+    UISettings::values.ip = ui->ip->text();
+    UISettings::values.port = (ui->port->isModified() && !ui->port->text().isEmpty())
+                                  ? ui->port->text()
+                                  : UISettings::values.port;
+
+    // attempt to connect in a different thread
+    QFuture<void> f = QtConcurrent::run([&] {
+        if (auto room_member = Network::GetRoomMember().lock()) {
+            auto port = UISettings::values.port.toUInt();
+            room_member->Join(ui->nickname->text().toStdString(), "",
+                              ui->ip->text().toStdString().c_str(), port, 0,
+                              Network::NoPreferredMac, ui->password->text().toStdString().c_str());
+        }
+    });
+    watcher->setFuture(f);
+    // and disable widgets and display a connecting while we wait
+    BeginConnecting();
+}
+
+void DirectConnectWindow::BeginConnecting() {
+    ui->connect->setEnabled(false);
+    ui->connect->setText(tr("Connecting"));
+}
+
+void DirectConnectWindow::EndConnecting() {
+    ui->connect->setEnabled(true);
+    ui->connect->setText(tr("Connect"));
+}
+
+void DirectConnectWindow::OnConnection() {
+    EndConnecting();
+
+    if (auto room_member = Network::GetRoomMember().lock()) {
+        if (room_member->GetState() == Network::RoomMember::State::Joined ||
+            room_member->GetState() == Network::RoomMember::State::Moderator) {
+
+            close();
+        }
+    }
+}

src/yuzu/multiplayer/direct_connect.h

@@ -0,0 +1,43 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <QDialog>
+#include <QFutureWatcher>
+#include "yuzu/multiplayer/validation.h"
+
+namespace Ui {
+class DirectConnect;
+}
+
+class DirectConnectWindow : public QDialog {
+    Q_OBJECT
+
+public:
+    explicit DirectConnectWindow(QWidget* parent = nullptr);
+    ~DirectConnectWindow();
+
+    void RetranslateUi();
+
+signals:
+    /**
+     * Signalled by this widget when it is closing itself and destroying any state such as
+     * connections that it might have.
+     */
+    void Closed();
+
+private slots:
+    void OnConnection();
+
+private:
+    void Connect();
+    void BeginConnecting();
+    void EndConnecting();
+
+    QFutureWatcher<void>* watcher;
+    std::unique_ptr<Ui::DirectConnect> ui;
+    Validation validation;
+};

src/yuzu/multiplayer/direct_connect.ui

@@ -0,0 +1,168 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>DirectConnect</class>
+ <widget class="QWidget" name="DirectConnect">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>455</width>
+    <height>161</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Direct Connect</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <layout class="QVBoxLayout" name="verticalLayout_3">
+     <item>
+      <layout class="QVBoxLayout" name="verticalLayout_2">
+       <item>
+        <layout class="QHBoxLayout" name="horizontalLayout">
+         <property name="spacing">
+          <number>0</number>
+         </property>
+         <property name="leftMargin">
+          <number>0</number>
+         </property>
+         <item>
+          <widget class="QComboBox" name="connection_type">
+           <item>
+            <property name="text">
+             <string>IP Address</string>
+            </property>
+           </item>
+          </widget>
+         </item>
+         <item>
+          <widget class="QWidget" name="ip_container" native="true">
+           <layout class="QHBoxLayout" name="ip_layout">
+            <property name="leftMargin">
+             <number>5</number>
+            </property>
+            <property name="topMargin">
+             <number>0</number>
+            </property>
+            <property name="rightMargin">
+             <number>0</number>
+            </property>
+            <property name="bottomMargin">
+             <number>0</number>
+            </property>
+            <item>
+             <widget class="QLabel" name="label_2">
+              <property name="text">
+               <string>IP</string>
+              </property>
+             </widget>
+            </item>
+            <item>
+             <widget class="QLineEdit" name="ip">
+              <property name="toolTip">
+               <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;IPv4 address of the host&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+              </property>
+              <property name="maxLength">
+               <number>16</number>
+              </property>
+             </widget>
+            </item>
+            <item>
+             <widget class="QLabel" name="label_3">
+              <property name="text">
+               <string>Port</string>
+              </property>
+             </widget>
+            </item>
+            <item>
+             <widget class="QLineEdit" name="port">
+              <property name="toolTip">
+               <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Port number the host is listening on&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+              </property>
+              <property name="maxLength">
+               <number>5</number>
+              </property>
+              <property name="placeholderText">
+               <string>24872</string>
+              </property>
+             </widget>
+            </item>
+           </layout>
+          </widget>
+         </item>
+        </layout>
+       </item>
+       <item>
+        <layout class="QHBoxLayout" name="horizontalLayout_2">
+         <item>
+          <widget class="QLabel" name="label_5">
+           <property name="text">
+            <string>Nickname</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLineEdit" name="nickname">
+           <property name="maxLength">
+            <number>20</number>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLabel" name="label">
+           <property name="text">
+            <string>Password</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLineEdit" name="password"/>
+         </item>
+        </layout>
+       </item>
+      </layout>
+     </item>
+     <item>
+      <spacer name="verticalSpacer">
+       <property name="orientation">
+        <enum>Qt::Vertical</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>20</width>
+         <height>20</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+     <item>
+      <layout class="QHBoxLayout" name="horizontalLayout_3">
+       <item>
+        <spacer name="horizontalSpacer">
+         <property name="orientation">
+          <enum>Qt::Horizontal</enum>
+         </property>
+         <property name="sizeHint" stdset="0">
+          <size>
+           <width>40</width>
+           <height>20</height>
+          </size>
+         </property>
+        </spacer>
+       </item>
+       <item>
+        <widget class="QPushButton" name="connect">
+         <property name="text">
+          <string>Connect</string>
+         </property>
+        </widget>
+       </item>
+      </layout>
+     </item>
+    </layout>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

src/yuzu/multiplayer/host_room.cpp

@@ -0,0 +1,237 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <future>
+#include <QColor>
+#include <QImage>
+#include <QList>
+#include <QLocale>
+#include <QMessageBox>
+#include <QMetaType>
+#include <QTime>
+#include <QtConcurrent/QtConcurrentRun>
+#include "common/logging/log.h"
+#include "common/settings.h"
+#include "core/announce_multiplayer_session.h"
+#include "ui_host_room.h"
+#include "yuzu/game_list_p.h"
+#include "yuzu/main.h"
+#include "yuzu/multiplayer/host_room.h"
+#include "yuzu/multiplayer/message.h"
+#include "yuzu/multiplayer/state.h"
+#include "yuzu/multiplayer/validation.h"
+#include "yuzu/uisettings.h"
+#ifdef ENABLE_WEB_SERVICE
+#include "web_service/verify_user_jwt.h"
+#endif
+
+HostRoomWindow::HostRoomWindow(QWidget* parent, QStandardItemModel* list,
+                               std::shared_ptr<Core::AnnounceMultiplayerSession> session)
+    : QDialog(parent, Qt::WindowTitleHint | Qt::WindowCloseButtonHint | Qt::WindowSystemMenuHint),
+      ui(std::make_unique<Ui::HostRoom>()), announce_multiplayer_session(session) {
+    ui->setupUi(this);
+
+    // set up validation for all of the fields
+    ui->room_name->setValidator(validation.GetRoomName());
+    ui->username->setValidator(validation.GetNickname());
+    ui->port->setValidator(validation.GetPort());
+    ui->port->setPlaceholderText(QString::number(Network::DefaultRoomPort));
+
+    // Create a proxy to the game list to display the list of preferred games
+    game_list = new QStandardItemModel;
+    UpdateGameList(list);
+
+    proxy = new ComboBoxProxyModel;
+    proxy->setSourceModel(game_list);
+    proxy->sort(0, Qt::AscendingOrder);
+    ui->game_list->setModel(proxy);
+
+    // Connect all the widgets to the appropriate events
+    connect(ui->host, &QPushButton::clicked, this, &HostRoomWindow::Host);
+
+    // Restore the settings:
+    ui->username->setText(UISettings::values.room_nickname);
+    if (ui->username->text().isEmpty() && !Settings::values.yuzu_username.GetValue().empty()) {
+        // Use yuzu Web Service user name as nickname by default
+        ui->username->setText(QString::fromStdString(Settings::values.yuzu_username.GetValue()));
+    }
+    ui->room_name->setText(UISettings::values.room_name);
+    ui->port->setText(UISettings::values.room_port);
+    ui->max_player->setValue(UISettings::values.max_player);
+    int index = UISettings::values.host_type;
+    if (index < ui->host_type->count()) {
+        ui->host_type->setCurrentIndex(index);
+    }
+    index = ui->game_list->findData(UISettings::values.game_id, GameListItemPath::ProgramIdRole);
+    if (index != -1) {
+        ui->game_list->setCurrentIndex(index);
+    }
+    ui->room_description->setText(UISettings::values.room_description);
+}
+
+HostRoomWindow::~HostRoomWindow() = default;
+
+void HostRoomWindow::UpdateGameList(QStandardItemModel* list) {
+    game_list->clear();
+    for (int i = 0; i < list->rowCount(); i++) {
+        auto parent = list->item(i, 0);
+        for (int j = 0; j < parent->rowCount(); j++) {
+            game_list->appendRow(parent->child(j)->clone());
+        }
+    }
+}
+
+void HostRoomWindow::RetranslateUi() {
+    ui->retranslateUi(this);
+}
+
+std::unique_ptr<Network::VerifyUser::Backend> HostRoomWindow::CreateVerifyBackend(
+    bool use_validation) const {
+    std::unique_ptr<Network::VerifyUser::Backend> verify_backend;
+    if (use_validation) {
+#ifdef ENABLE_WEB_SERVICE
+        verify_backend = std::make_unique<WebService::VerifyUserJWT>(Settings::values.web_api_url);
+#else
+        verify_backend = std::make_unique<Network::VerifyUser::NullBackend>();
+#endif
+    } else {
+        verify_backend = std::make_unique<Network::VerifyUser::NullBackend>();
+    }
+    return verify_backend;
+}
+
+void HostRoomWindow::Host() {
+    if (!ui->username->hasAcceptableInput()) {
+        NetworkMessage::ErrorManager::ShowError(NetworkMessage::ErrorManager::USERNAME_NOT_VALID);
+        return;
+    }
+    if (!ui->room_name->hasAcceptableInput()) {
+        NetworkMessage::ErrorManager::ShowError(NetworkMessage::ErrorManager::ROOMNAME_NOT_VALID);
+        return;
+    }
+    if (!ui->port->hasAcceptableInput()) {
+        NetworkMessage::ErrorManager::ShowError(NetworkMessage::ErrorManager::PORT_NOT_VALID);
+        return;
+    }
+    if (ui->game_list->currentIndex() == -1) {
+        NetworkMessage::ErrorManager::ShowError(NetworkMessage::ErrorManager::GAME_NOT_SELECTED);
+        return;
+    }
+    if (auto member = Network::GetRoomMember().lock()) {
+        if (member->GetState() == Network::RoomMember::State::Joining) {
+            return;
+        } else if (member->IsConnected()) {
+            auto parent = static_cast<MultiplayerState*>(parentWidget());
+            if (!parent->OnCloseRoom()) {
+                close();
+                return;
+            }
+        }
+        ui->host->setDisabled(true);
+
+        auto game_name = ui->game_list->currentData(Qt::DisplayRole).toString();
+        auto game_id = ui->game_list->currentData(GameListItemPath::ProgramIdRole).toLongLong();
+        auto port = ui->port->isModified() ? ui->port->text().toInt() : Network::DefaultRoomPort;
+        auto password = ui->password->text().toStdString();
+        const bool is_public = ui->host_type->currentIndex() == 0;
+        Network::Room::BanList ban_list{};
+        if (ui->load_ban_list->isChecked()) {
+            ban_list = UISettings::values.ban_list;
+        }
+        if (auto room = Network::GetRoom().lock()) {
+            bool created = room->Create(
+                ui->room_name->text().toStdString(),
+                ui->room_description->toPlainText().toStdString(), "", port, password,
+                ui->max_player->value(), Settings::values.yuzu_username.GetValue(),
+                game_name.toStdString(), game_id, CreateVerifyBackend(is_public), ban_list);
+            if (!created) {
+                NetworkMessage::ErrorManager::ShowError(
+                    NetworkMessage::ErrorManager::COULD_NOT_CREATE_ROOM);
+                LOG_ERROR(Network, "Could not create room!");
+                ui->host->setEnabled(true);
+                return;
+            }
+        }
+        // Start the announce session if they chose Public
+        if (is_public) {
+            if (auto session = announce_multiplayer_session.lock()) {
+                // Register the room first to ensure verify_UID is present when we connect
+                WebService::WebResult result = session->Register();
+                if (result.result_code != WebService::WebResult::Code::Success) {
+                    QMessageBox::warning(
+                        this, tr("Error"),
+                        tr("Failed to announce the room to the public lobby. In order to host a "
+                           "room publicly, you must have a valid yuzu account configured in "
+                           "Emulation -> Configure -> Web. If you do not want to publish a room in "
+                           "the public lobby, then select Unlisted instead.\nDebug Message: ") +
+                            QString::fromStdString(result.result_string),
+                        QMessageBox::Ok);
+                    ui->host->setEnabled(true);
+                    if (auto room = Network::GetRoom().lock()) {
+                        room->Destroy();
+                    }
+                    return;
+                }
+                session->Start();
+            } else {
+                LOG_ERROR(Network, "Starting announce session failed");
+            }
+        }
+        std::string token;
+#ifdef ENABLE_WEB_SERVICE
+        if (is_public) {
+            WebService::Client client(Settings::values.web_api_url, Settings::values.yuzu_username,
+                                      Settings::values.yuzu_token);
+            if (auto room = Network::GetRoom().lock()) {
+                token = client.GetExternalJWT(room->GetVerifyUID()).returned_data;
+            }
+            if (token.empty()) {
+                LOG_ERROR(WebService, "Could not get external JWT, verification may fail");
+            } else {
+                LOG_INFO(WebService, "Successfully requested external JWT: size={}", token.size());
+            }
+        }
+#endif
+        // TODO: Check what to do with this
+        member->Join(ui->username->text().toStdString(), "", "127.0.0.1", port, 0,
+                     Network::NoPreferredMac, password, token);
+
+        // Store settings
+        UISettings::values.room_nickname = ui->username->text();
+        UISettings::values.room_name = ui->room_name->text();
+        UISettings::values.game_id =
+            ui->game_list->currentData(GameListItemPath::ProgramIdRole).toLongLong();
+        UISettings::values.max_player = ui->max_player->value();
+
+        UISettings::values.host_type = ui->host_type->currentIndex();
+        UISettings::values.room_port = (ui->port->isModified() && !ui->port->text().isEmpty())
+                                           ? ui->port->text()
+                                           : QString::number(Network::DefaultRoomPort);
+        UISettings::values.room_description = ui->room_description->toPlainText();
+        ui->host->setEnabled(true);
+        close();
+    }
+}
+
+QVariant ComboBoxProxyModel::data(const QModelIndex& idx, int role) const {
+    if (role != Qt::DisplayRole) {
+        auto val = QSortFilterProxyModel::data(idx, role);
+        // If its the icon, shrink it to 16x16
+        if (role == Qt::DecorationRole)
+            val = val.value<QImage>().scaled(16, 16, Qt::KeepAspectRatio);
+        return val;
+    }
+    std::string filename;
+    Common::SplitPath(
+        QSortFilterProxyModel::data(idx, GameListItemPath::FullPathRole).toString().toStdString(),
+        nullptr, &filename, nullptr);
+    QString title = QSortFilterProxyModel::data(idx, GameListItemPath::TitleRole).toString();
+    return title.isEmpty() ? QString::fromStdString(filename) : title;
+}
+
+bool ComboBoxProxyModel::lessThan(const QModelIndex& left, const QModelIndex& right) const {
+    auto leftData = left.data(GameListItemPath::TitleRole).toString();
+    auto rightData = right.data(GameListItemPath::TitleRole).toString();
+    return leftData.compare(rightData) < 0;
+}

src/yuzu/multiplayer/host_room.h

@@ -0,0 +1,74 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <QDialog>
+#include <QSortFilterProxyModel>
+#include <QStandardItemModel>
+#include <QVariant>
+#include "network/network.h"
+#include "yuzu/multiplayer/chat_room.h"
+#include "yuzu/multiplayer/validation.h"
+
+namespace Ui {
+class HostRoom;
+}
+
+namespace Core {
+class AnnounceMultiplayerSession;
+}
+
+class ConnectionError;
+class ComboBoxProxyModel;
+
+class ChatMessage;
+
+namespace Network::VerifyUser {
+class Backend;
+};
+
+class HostRoomWindow : public QDialog {
+    Q_OBJECT
+
+public:
+    explicit HostRoomWindow(QWidget* parent, QStandardItemModel* list,
+                            std::shared_ptr<Core::AnnounceMultiplayerSession> session);
+    ~HostRoomWindow();
+
+    /**
+     * Updates the dialog with a new game list model.
+     * This model should be the original model of the game list.
+     */
+    void UpdateGameList(QStandardItemModel* list);
+    void RetranslateUi();
+
+private:
+    void Host();
+    std::unique_ptr<Network::VerifyUser::Backend> CreateVerifyBackend(bool use_validation) const;
+
+    std::unique_ptr<Ui::HostRoom> ui;
+    std::weak_ptr<Core::AnnounceMultiplayerSession> announce_multiplayer_session;
+    QStandardItemModel* game_list;
+    ComboBoxProxyModel* proxy;
+    Validation validation;
+};
+
+/**
+ * Proxy Model for the game list combo box so we can reuse the game list model while still
+ * displaying the fields slightly differently
+ */
+class ComboBoxProxyModel : public QSortFilterProxyModel {
+    Q_OBJECT
+
+public:
+    int columnCount(const QModelIndex& idx) const override {
+        return 1;
+    }
+
+    QVariant data(const QModelIndex& idx, int role) const override;
+
+    bool lessThan(const QModelIndex& left, const QModelIndex& right) const override;
+};

src/yuzu/multiplayer/host_room.ui

@@ -0,0 +1,207 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>HostRoom</class>
+ <widget class="QWidget" name="HostRoom">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>607</width>
+    <height>211</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Create Room</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout_3">
+   <item>
+    <widget class="QWidget" name="settings" native="true">
+     <layout class="QHBoxLayout">
+      <property name="leftMargin">
+       <number>0</number>
+      </property>
+      <property name="topMargin">
+       <number>0</number>
+      </property>
+      <property name="rightMargin">
+       <number>0</number>
+      </property>
+      <item>
+       <layout class="QFormLayout" name="formLayout_2">
+        <property name="labelAlignment">
+         <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+        </property>
+        <item row="0" column="0">
+         <widget class="QLabel" name="label">
+          <property name="text">
+           <string>Room Name</string>
+          </property>
+         </widget>
+        </item>
+        <item row="0" column="1">
+         <widget class="QLineEdit" name="room_name">
+          <property name="maxLength">
+           <number>50</number>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="0">
+         <widget class="QLabel" name="label_3">
+          <property name="text">
+           <string>Preferred Game</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="1">
+         <widget class="QComboBox" name="game_list"/>
+        </item>
+        <item row="2" column="0">
+         <widget class="QLabel" name="label_2">
+          <property name="text">
+           <string>Max Players</string>
+          </property>
+         </widget>
+        </item>
+        <item row="2" column="1">
+         <widget class="QSpinBox" name="max_player">
+          <property name="minimum">
+           <number>2</number>
+          </property>
+          <property name="maximum">
+           <number>16</number>
+          </property>
+          <property name="value">
+           <number>8</number>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+      <item>
+       <layout class="QFormLayout" name="formLayout">
+        <property name="labelAlignment">
+         <set>Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter</set>
+        </property>
+        <item row="0" column="1">
+         <widget class="QLineEdit" name="username"/>
+        </item>
+        <item row="0" column="0">
+         <widget class="QLabel" name="label_6">
+          <property name="text">
+           <string>Username</string>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="1">
+         <widget class="QLineEdit" name="password">
+          <property name="echoMode">
+           <enum>QLineEdit::PasswordEchoOnEdit</enum>
+          </property>
+          <property name="placeholderText">
+           <string>(Leave blank for open game)</string>
+          </property>
+         </widget>
+        </item>
+        <item row="2" column="1">
+         <widget class="QLineEdit" name="port">
+          <property name="inputMethodHints">
+           <set>Qt::ImhDigitsOnly</set>
+          </property>
+          <property name="maxLength">
+           <number>5</number>
+          </property>
+         </widget>
+        </item>
+        <item row="1" column="0">
+         <widget class="QLabel" name="label_5">
+          <property name="text">
+           <string>Password</string>
+          </property>
+         </widget>
+        </item>
+        <item row="2" column="0">
+         <widget class="QLabel" name="label_4">
+          <property name="text">
+           <string>Port</string>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout_3">
+     <item>
+      <widget class="QLabel" name="label_7">
+       <property name="text">
+        <string>Room Description</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QTextEdit" name="room_description"/>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <layout class="QHBoxLayout">
+     <item>
+      <widget class="QCheckBox" name="load_ban_list">
+       <property name="text">
+        <string>Load Previous Ban List</string>
+       </property>
+       <property name="checked">
+        <bool>true</bool>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <property name="rightMargin">
+      <number>0</number>
+     </property>
+     <item>
+      <spacer name="horizontalSpacer">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>40</width>
+         <height>20</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+     <item>
+      <widget class="QComboBox" name="host_type">
+       <item>
+        <property name="text">
+         <string>Public</string>
+        </property>
+       </item>
+       <item>
+        <property name="text">
+         <string>Unlisted</string>
+        </property>
+       </item>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="host">
+       <property name="text">
+        <string>Host Room</string>
+       </property>
+      </widget>
+     </item>
+    </layout>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

src/yuzu/multiplayer/lobby.cpp

@@ -0,0 +1,360 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <QInputDialog>
+#include <QList>
+#include <QtConcurrent/QtConcurrentRun>
+#include "common/logging/log.h"
+#include "common/settings.h"
+#include "network/network.h"
+#include "ui_lobby.h"
+#include "yuzu/game_list_p.h"
+#include "yuzu/main.h"
+#include "yuzu/multiplayer/client_room.h"
+#include "yuzu/multiplayer/lobby.h"
+#include "yuzu/multiplayer/lobby_p.h"
+#include "yuzu/multiplayer/message.h"
+#include "yuzu/multiplayer/state.h"
+#include "yuzu/multiplayer/validation.h"
+#include "yuzu/uisettings.h"
+#ifdef ENABLE_WEB_SERVICE
+#include "web_service/web_backend.h"
+#endif
+
+Lobby::Lobby(QWidget* parent, QStandardItemModel* list,
+             std::shared_ptr<Core::AnnounceMultiplayerSession> session)
+    : QDialog(parent, Qt::WindowTitleHint | Qt::WindowCloseButtonHint | Qt::WindowSystemMenuHint),
+      ui(std::make_unique<Ui::Lobby>()), announce_multiplayer_session(session) {
+    ui->setupUi(this);
+
+    // setup the watcher for background connections
+    watcher = new QFutureWatcher<void>;
+
+    model = new QStandardItemModel(ui->room_list);
+
+    // Create a proxy to the game list to get the list of games owned
+    game_list = new QStandardItemModel;
+    UpdateGameList(list);
+
+    proxy = new LobbyFilterProxyModel(this, game_list);
+    proxy->setSourceModel(model);
+    proxy->setDynamicSortFilter(true);
+    proxy->setFilterCaseSensitivity(Qt::CaseInsensitive);
+    proxy->setSortLocaleAware(true);
+    ui->room_list->setModel(proxy);
+    ui->room_list->header()->setSectionResizeMode(QHeaderView::Interactive);
+    ui->room_list->header()->stretchLastSection();
+    ui->room_list->setAlternatingRowColors(true);
+    ui->room_list->setSelectionMode(QHeaderView::SingleSelection);
+    ui->room_list->setSelectionBehavior(QHeaderView::SelectRows);
+    ui->room_list->setVerticalScrollMode(QHeaderView::ScrollPerPixel);
+    ui->room_list->setHorizontalScrollMode(QHeaderView::ScrollPerPixel);
+    ui->room_list->setSortingEnabled(true);
+    ui->room_list->setEditTriggers(QHeaderView::NoEditTriggers);
+    ui->room_list->setExpandsOnDoubleClick(false);
+    ui->room_list->setContextMenuPolicy(Qt::CustomContextMenu);
+
+    ui->nickname->setValidator(validation.GetNickname());
+    ui->nickname->setText(UISettings::values.nickname);
+    if (ui->nickname->text().isEmpty() && !Settings::values.yuzu_username.GetValue().empty()) {
+        // Use yuzu Web Service user name as nickname by default
+        ui->nickname->setText(QString::fromStdString(Settings::values.yuzu_username.GetValue()));
+    }
+
+    // UI Buttons
+    connect(ui->refresh_list, &QPushButton::clicked, this, &Lobby::RefreshLobby);
+    connect(ui->games_owned, &QCheckBox::toggled, proxy, &LobbyFilterProxyModel::SetFilterOwned);
+    connect(ui->hide_full, &QCheckBox::toggled, proxy, &LobbyFilterProxyModel::SetFilterFull);
+    connect(ui->search, &QLineEdit::textChanged, proxy, &LobbyFilterProxyModel::SetFilterSearch);
+    connect(ui->room_list, &QTreeView::doubleClicked, this, &Lobby::OnJoinRoom);
+    connect(ui->room_list, &QTreeView::clicked, this, &Lobby::OnExpandRoom);
+
+    // Actions
+    connect(&room_list_watcher, &QFutureWatcher<AnnounceMultiplayerRoom::RoomList>::finished, this,
+            &Lobby::OnRefreshLobby);
+
+    // manually start a refresh when the window is opening
+    // TODO(jroweboy): if this refresh is slow for people with bad internet, then don't do it as
+    // part of the constructor, but offload the refresh until after the window shown. perhaps emit a
+    // refreshroomlist signal from places that open the lobby
+    RefreshLobby();
+}
+
+Lobby::~Lobby() = default;
+
+void Lobby::UpdateGameList(QStandardItemModel* list) {
+    game_list->clear();
+    for (int i = 0; i < list->rowCount(); i++) {
+        auto parent = list->item(i, 0);
+        for (int j = 0; j < parent->rowCount(); j++) {
+            game_list->appendRow(parent->child(j)->clone());
+        }
+    }
+    if (proxy)
+        proxy->UpdateGameList(game_list);
+}
+
+void Lobby::RetranslateUi() {
+    ui->retranslateUi(this);
+}
+
+QString Lobby::PasswordPrompt() {
+    bool ok;
+    const QString text =
+        QInputDialog::getText(this, tr("Password Required to Join"), tr("Password:"),
+                              QLineEdit::Password, QString(), &ok);
+    return ok ? text : QString();
+}
+
+void Lobby::OnExpandRoom(const QModelIndex& index) {
+    QModelIndex member_index = proxy->index(index.row(), Column::MEMBER);
+    auto member_list = proxy->data(member_index, LobbyItemMemberList::MemberListRole).toList();
+}
+
+void Lobby::OnJoinRoom(const QModelIndex& source) {
+    if (const auto member = Network::GetRoomMember().lock()) {
+        // Prevent the user from trying to join a room while they are already joining.
+        if (member->GetState() == Network::RoomMember::State::Joining) {
+            return;
+        } else if (member->IsConnected()) {
+            // And ask if they want to leave the room if they are already in one.
+            if (!NetworkMessage::WarnDisconnect()) {
+                return;
+            }
+        }
+    }
+    QModelIndex index = source;
+    // If the user double clicks on a child row (aka the player list) then use the parent instead
+    if (source.parent() != QModelIndex()) {
+        index = source.parent();
+    }
+    if (!ui->nickname->hasAcceptableInput()) {
+        NetworkMessage::ErrorManager::ShowError(NetworkMessage::ErrorManager::USERNAME_NOT_VALID);
+        return;
+    }
+
+    // Get a password to pass if the room is password protected
+    QModelIndex password_index = proxy->index(index.row(), Column::ROOM_NAME);
+    bool has_password = proxy->data(password_index, LobbyItemName::PasswordRole).toBool();
+    const std::string password = has_password ? PasswordPrompt().toStdString() : "";
+    if (has_password && password.empty()) {
+        return;
+    }
+
+    QModelIndex connection_index = proxy->index(index.row(), Column::HOST);
+    const std::string nickname = ui->nickname->text().toStdString();
+    const std::string ip =
+        proxy->data(connection_index, LobbyItemHost::HostIPRole).toString().toStdString();
+    int port = proxy->data(connection_index, LobbyItemHost::HostPortRole).toInt();
+    const std::string verify_UID =
+        proxy->data(connection_index, LobbyItemHost::HostVerifyUIDRole).toString().toStdString();
+
+    // attempt to connect in a different thread
+    QFuture<void> f = QtConcurrent::run([nickname, ip, port, password, verify_UID] {
+        std::string token;
+#ifdef ENABLE_WEB_SERVICE
+        if (!Settings::values.yuzu_username.empty() && !Settings::values.yuzu_token.empty()) {
+            WebService::Client client(Settings::values.web_api_url, Settings::values.yuzu_username,
+                                      Settings::values.yuzu_token);
+            token = client.GetExternalJWT(verify_UID).returned_data;
+            if (token.empty()) {
+                LOG_ERROR(WebService, "Could not get external JWT, verification may fail");
+            } else {
+                LOG_INFO(WebService, "Successfully requested external JWT: size={}", token.size());
+            }
+        }
+#endif
+        if (auto room_member = Network::GetRoomMember().lock()) {
+            room_member->Join(nickname, "", ip.c_str(), port, 0, Network::NoPreferredMac, password,
+                              token);
+        }
+    });
+    watcher->setFuture(f);
+
+    // TODO(jroweboy): disable widgets and display a connecting while we wait
+
+    // Save settings
+    UISettings::values.nickname = ui->nickname->text();
+    UISettings::values.ip = proxy->data(connection_index, LobbyItemHost::HostIPRole).toString();
+    UISettings::values.port = proxy->data(connection_index, LobbyItemHost::HostPortRole).toString();
+}
+
+void Lobby::ResetModel() {
+    model->clear();
+    model->insertColumns(0, Column::TOTAL);
+    model->setHeaderData(Column::EXPAND, Qt::Horizontal, QString(), Qt::DisplayRole);
+    model->setHeaderData(Column::ROOM_NAME, Qt::Horizontal, tr("Room Name"), Qt::DisplayRole);
+    model->setHeaderData(Column::GAME_NAME, Qt::Horizontal, tr("Preferred Game"), Qt::DisplayRole);
+    model->setHeaderData(Column::HOST, Qt::Horizontal, tr("Host"), Qt::DisplayRole);
+    model->setHeaderData(Column::MEMBER, Qt::Horizontal, tr("Players"), Qt::DisplayRole);
+}
+
+void Lobby::RefreshLobby() {
+    if (auto session = announce_multiplayer_session.lock()) {
+        ResetModel();
+        ui->refresh_list->setEnabled(false);
+        ui->refresh_list->setText(tr("Refreshing"));
+        room_list_watcher.setFuture(
+            QtConcurrent::run([session]() { return session->GetRoomList(); }));
+    } else {
+        // TODO(jroweboy): Display an error box about announce couldn't be started
+    }
+}
+
+void Lobby::OnRefreshLobby() {
+    AnnounceMultiplayerRoom::RoomList new_room_list = room_list_watcher.result();
+    for (auto room : new_room_list) {
+        // find the icon for the game if this person owns that game.
+        QPixmap smdh_icon;
+        for (int r = 0; r < game_list->rowCount(); ++r) {
+            auto index = game_list->index(r, 0);
+            auto game_id = game_list->data(index, GameListItemPath::ProgramIdRole).toULongLong();
+            if (game_id != 0 && room.preferred_game_id == game_id) {
+                smdh_icon = game_list->data(index, Qt::DecorationRole).value<QPixmap>();
+            }
+        }
+
+        QList<QVariant> members;
+        for (auto member : room.members) {
+            QVariant var;
+            var.setValue(LobbyMember{QString::fromStdString(member.username),
+                                     QString::fromStdString(member.nickname), member.game_id,
+                                     QString::fromStdString(member.game_name)});
+            members.append(var);
+        }
+
+        auto first_item = new LobbyItem();
+        auto row = QList<QStandardItem*>({
+            first_item,
+            new LobbyItemName(room.has_password, QString::fromStdString(room.name)),
+            new LobbyItemGame(room.preferred_game_id, QString::fromStdString(room.preferred_game),
+                              smdh_icon),
+            new LobbyItemHost(QString::fromStdString(room.owner), QString::fromStdString(room.ip),
+                              room.port, QString::fromStdString(room.verify_UID)),
+            new LobbyItemMemberList(members, room.max_player),
+        });
+        model->appendRow(row);
+        // To make the rows expandable, add the member data as a child of the first column of the
+        // rows with people in them and have qt set them to colspan after the model is finished
+        // resetting
+        if (!room.description.empty()) {
+            first_item->appendRow(
+                new LobbyItemDescription(QString::fromStdString(room.description)));
+        }
+        if (!room.members.empty()) {
+            first_item->appendRow(new LobbyItemExpandedMemberList(members));
+        }
+    }
+
+    // Reenable the refresh button and resize the columns
+    ui->refresh_list->setEnabled(true);
+    ui->refresh_list->setText(tr("Refresh List"));
+    ui->room_list->header()->stretchLastSection();
+    for (int i = 0; i < Column::TOTAL - 1; ++i) {
+        ui->room_list->resizeColumnToContents(i);
+    }
+
+    // Set the member list child items to span all columns
+    for (int i = 0; i < proxy->rowCount(); i++) {
+        auto parent = model->item(i, 0);
+        for (int j = 0; j < parent->rowCount(); j++) {
+            ui->room_list->setFirstColumnSpanned(j, proxy->index(i, 0), true);
+        }
+    }
+}
+
+LobbyFilterProxyModel::LobbyFilterProxyModel(QWidget* parent, QStandardItemModel* list)
+    : QSortFilterProxyModel(parent), game_list(list) {}
+
+void LobbyFilterProxyModel::UpdateGameList(QStandardItemModel* list) {
+    game_list = list;
+}
+
+bool LobbyFilterProxyModel::filterAcceptsRow(int sourceRow, const QModelIndex& sourceParent) const {
+    // Prioritize filters by fastest to compute
+
+    // pass over any child rows (aka row that shows the players in the room)
+    if (sourceParent != QModelIndex()) {
+        return true;
+    }
+
+    // filter by filled rooms
+    if (filter_full) {
+        QModelIndex member_list = sourceModel()->index(sourceRow, Column::MEMBER, sourceParent);
+        int player_count =
+            sourceModel()->data(member_list, LobbyItemMemberList::MemberListRole).toList().size();
+        int max_players =
+            sourceModel()->data(member_list, LobbyItemMemberList::MaxPlayerRole).toInt();
+        if (player_count >= max_players) {
+            return false;
+        }
+    }
+
+    // filter by search parameters
+    if (!filter_search.isEmpty()) {
+        QModelIndex game_name = sourceModel()->index(sourceRow, Column::GAME_NAME, sourceParent);
+        QModelIndex room_name = sourceModel()->index(sourceRow, Column::ROOM_NAME, sourceParent);
+        QModelIndex host_name = sourceModel()->index(sourceRow, Column::HOST, sourceParent);
+        bool preferred_game_match = sourceModel()
+                                        ->data(game_name, LobbyItemGame::GameNameRole)
+                                        .toString()
+                                        .contains(filter_search, filterCaseSensitivity());
+        bool room_name_match = sourceModel()
+                                   ->data(room_name, LobbyItemName::NameRole)
+                                   .toString()
+                                   .contains(filter_search, filterCaseSensitivity());
+        bool username_match = sourceModel()
+                                  ->data(host_name, LobbyItemHost::HostUsernameRole)
+                                  .toString()
+                                  .contains(filter_search, filterCaseSensitivity());
+        if (!preferred_game_match && !room_name_match && !username_match) {
+            return false;
+        }
+    }
+
+    // filter by game owned
+    if (filter_owned) {
+        QModelIndex game_name = sourceModel()->index(sourceRow, Column::GAME_NAME, sourceParent);
+        QList<QModelIndex> owned_games;
+        for (int r = 0; r < game_list->rowCount(); ++r) {
+            owned_games.append(QModelIndex(game_list->index(r, 0)));
+        }
+        auto current_id = sourceModel()->data(game_name, LobbyItemGame::TitleIDRole).toLongLong();
+        if (current_id == 0) {
+            // TODO(jroweboy): homebrew often doesn't have a game id and this hides them
+            return false;
+        }
+        bool owned = false;
+        for (const auto& game : owned_games) {
+            auto game_id = game_list->data(game, GameListItemPath::ProgramIdRole).toLongLong();
+            if (current_id == game_id) {
+                owned = true;
+            }
+        }
+        if (!owned) {
+            return false;
+        }
+    }
+
+    return true;
+}
+
+void LobbyFilterProxyModel::sort(int column, Qt::SortOrder order) {
+    sourceModel()->sort(column, order);
+}
+
+void LobbyFilterProxyModel::SetFilterOwned(bool filter) {
+    filter_owned = filter;
+    invalidate();
+}
+
+void LobbyFilterProxyModel::SetFilterFull(bool filter) {
+    filter_full = filter;
+    invalidate();
+}
+
+void LobbyFilterProxyModel::SetFilterSearch(const QString& filter) {
+    filter_search = filter;
+    invalidate();
+}

src/yuzu/multiplayer/lobby.h

@@ -0,0 +1,127 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <QDialog>
+#include <QFutureWatcher>
+#include <QSortFilterProxyModel>
+#include <QStandardItemModel>
+#include "common/announce_multiplayer_room.h"
+#include "core/announce_multiplayer_session.h"
+#include "network/network.h"
+#include "yuzu/multiplayer/validation.h"
+
+namespace Ui {
+class Lobby;
+}
+
+class LobbyModel;
+class LobbyFilterProxyModel;
+
+/**
+ * Listing of all public games pulled from services. The lobby should be simple enough for users to
+ * find the game they want to play, and join it.
+ */
+class Lobby : public QDialog {
+    Q_OBJECT
+
+public:
+    explicit Lobby(QWidget* parent, QStandardItemModel* list,
+                   std::shared_ptr<Core::AnnounceMultiplayerSession> session);
+    ~Lobby() override;
+
+    /**
+     * Updates the lobby with a new game list model.
+     * This model should be the original model of the game list.
+     */
+    void UpdateGameList(QStandardItemModel* list);
+    void RetranslateUi();
+
+public slots:
+    /**
+     * Begin the process to pull the latest room list from web services. After the listing is
+     * returned from web services, `LobbyRefreshed` will be signalled
+     */
+    void RefreshLobby();
+
+private slots:
+    /**
+     * Pulls the list of rooms from network and fills out the lobby model with the results
+     */
+    void OnRefreshLobby();
+
+    /**
+     * Handler for single clicking on a room in the list. Expands the treeitem to show player
+     * information for the people in the room
+     *
+     * index - The row of the proxy model that the user wants to join.
+     */
+    void OnExpandRoom(const QModelIndex&);
+
+    /**
+     * Handler for double clicking on a room in the list. Gathers the host ip and port and attempts
+     * to connect. Will also prompt for a password in case one is required.
+     *
+     * index - The row of the proxy model that the user wants to join.
+     */
+    void OnJoinRoom(const QModelIndex&);
+
+signals:
+    void StateChanged(const Network::RoomMember::State&);
+
+private:
+    /**
+     * Removes all entries in the Lobby before refreshing.
+     */
+    void ResetModel();
+
+    /**
+     * Prompts for a password. Returns an empty QString if the user either did not provide a
+     * password or if the user closed the window.
+     */
+    QString PasswordPrompt();
+
+    std::unique_ptr<Ui::Lobby> ui;
+
+    QStandardItemModel* model{};
+    QStandardItemModel* game_list{};
+    LobbyFilterProxyModel* proxy{};
+
+    QFutureWatcher<AnnounceMultiplayerRoom::RoomList> room_list_watcher;
+    std::weak_ptr<Core::AnnounceMultiplayerSession> announce_multiplayer_session;
+    QFutureWatcher<void>* watcher;
+    Validation validation;
+};
+
+/**
+ * Proxy Model for filtering the lobby
+ */
+class LobbyFilterProxyModel : public QSortFilterProxyModel {
+    Q_OBJECT;
+
+public:
+    explicit LobbyFilterProxyModel(QWidget* parent, QStandardItemModel* list);
+
+    /**
+     * Updates the filter with a new game list model.
+     * This model should be the processed one created by the Lobby.
+     */
+    void UpdateGameList(QStandardItemModel* list);
+
+    bool filterAcceptsRow(int sourceRow, const QModelIndex& sourceParent) const override;
+    void sort(int column, Qt::SortOrder order) override;
+
+public slots:
+    void SetFilterOwned(bool);
+    void SetFilterFull(bool);
+    void SetFilterSearch(const QString&);
+
+private:
+    QStandardItemModel* game_list;
+    bool filter_owned = false;
+    bool filter_full = false;
+    QString filter_search;
+};

src/yuzu/multiplayer/lobby.ui

@@ -0,0 +1,123 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Lobby</class>
+ <widget class="QWidget" name="Lobby">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>903</width>
+    <height>487</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Public Room Browser</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <layout class="QVBoxLayout" name="verticalLayout_2">
+     <property name="spacing">
+      <number>3</number>
+     </property>
+     <item>
+      <layout class="QHBoxLayout" name="horizontalLayout_3">
+       <property name="spacing">
+        <number>6</number>
+       </property>
+       <item>
+        <layout class="QHBoxLayout" name="horizontalLayout_5">
+         <item>
+          <widget class="QLabel" name="label">
+           <property name="text">
+            <string>Nickname</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLineEdit" name="nickname">
+           <property name="placeholderText">
+            <string>Nickname</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <spacer name="horizontalSpacer_2">
+           <property name="orientation">
+            <enum>Qt::Horizontal</enum>
+           </property>
+           <property name="sizeHint" stdset="0">
+            <size>
+             <width>40</width>
+             <height>20</height>
+            </size>
+           </property>
+          </spacer>
+         </item>
+         <item>
+          <widget class="QLabel" name="label_2">
+           <property name="text">
+            <string>Filters</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QLineEdit" name="search">
+           <property name="placeholderText">
+            <string>Search</string>
+           </property>
+           <property name="clearButtonEnabled">
+            <bool>true</bool>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QCheckBox" name="games_owned">
+           <property name="text">
+            <string>Games I Own</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <widget class="QCheckBox" name="hide_full">
+           <property name="text">
+            <string>Hide Full Rooms</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <spacer name="horizontalSpacer">
+           <property name="orientation">
+            <enum>Qt::Horizontal</enum>
+           </property>
+           <property name="sizeHint" stdset="0">
+            <size>
+             <width>40</width>
+             <height>20</height>
+            </size>
+           </property>
+          </spacer>
+         </item>
+         <item>
+          <widget class="QPushButton" name="refresh_list">
+           <property name="text">
+            <string>Refresh Lobby</string>
+           </property>
+          </widget>
+         </item>
+        </layout>
+       </item>
+      </layout>
+     </item>
+     <item>
+      <widget class="QTreeView" name="room_list"/>
+     </item>
+     <item>
+      <widget class="QWidget" name="widget" native="true"/>
+     </item>
+    </layout>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

src/yuzu/multiplayer/lobby_p.h

@@ -0,0 +1,239 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <utility>
+#include <QPixmap>
+#include <QStandardItem>
+#include <QStandardItemModel>
+#include "common/common_types.h"
+
+namespace Column {
+enum List {
+    EXPAND,
+    ROOM_NAME,
+    GAME_NAME,
+    HOST,
+    MEMBER,
+    TOTAL,
+};
+}
+
+class LobbyItem : public QStandardItem {
+public:
+    LobbyItem() = default;
+    explicit LobbyItem(const QString& string) : QStandardItem(string) {}
+    virtual ~LobbyItem() override = default;
+};
+
+class LobbyItemName : public LobbyItem {
+public:
+    static const int NameRole = Qt::UserRole + 1;
+    static const int PasswordRole = Qt::UserRole + 2;
+
+    LobbyItemName() = default;
+    explicit LobbyItemName(bool has_password, QString name) : LobbyItem() {
+        setData(name, NameRole);
+        setData(has_password, PasswordRole);
+    }
+
+    QVariant data(int role) const override {
+        if (role == Qt::DecorationRole) {
+            bool has_password = data(PasswordRole).toBool();
+            return has_password ? QIcon::fromTheme(QStringLiteral("lock")).pixmap(16) : QIcon();
+        }
+        if (role != Qt::DisplayRole) {
+            return LobbyItem::data(role);
+        }
+        return data(NameRole).toString();
+    }
+
+    bool operator<(const QStandardItem& other) const override {
+        return data(NameRole).toString().localeAwareCompare(other.data(NameRole).toString()) < 0;
+    }
+};
+
+class LobbyItemDescription : public LobbyItem {
+public:
+    static const int DescriptionRole = Qt::UserRole + 1;
+
+    LobbyItemDescription() = default;
+    explicit LobbyItemDescription(QString description) {
+        setData(description, DescriptionRole);
+    }
+
+    QVariant data(int role) const override {
+        if (role != Qt::DisplayRole) {
+            return LobbyItem::data(role);
+        }
+        auto description = data(DescriptionRole).toString();
+        description.prepend(QStringLiteral("Description: "));
+        return description;
+    }
+
+    bool operator<(const QStandardItem& other) const override {
+        return data(DescriptionRole)
+                   .toString()
+                   .localeAwareCompare(other.data(DescriptionRole).toString()) < 0;
+    }
+};
+
+class LobbyItemGame : public LobbyItem {
+public:
+    static const int TitleIDRole = Qt::UserRole + 1;
+    static const int GameNameRole = Qt::UserRole + 2;
+    static const int GameIconRole = Qt::UserRole + 3;
+
+    LobbyItemGame() = default;
+    explicit LobbyItemGame(u64 title_id, QString game_name, QPixmap smdh_icon) {
+        setData(static_cast<unsigned long long>(title_id), TitleIDRole);
+        setData(game_name, GameNameRole);
+        if (!smdh_icon.isNull()) {
+            setData(smdh_icon, GameIconRole);
+        }
+    }
+
+    QVariant data(int role) const override {
+        if (role == Qt::DecorationRole) {
+            auto val = data(GameIconRole);
+            if (val.isValid()) {
+                val = val.value<QPixmap>().scaled(16, 16, Qt::KeepAspectRatio);
+            }
+            return val;
+        } else if (role != Qt::DisplayRole) {
+            return LobbyItem::data(role);
+        }
+        return data(GameNameRole).toString();
+    }
+
+    bool operator<(const QStandardItem& other) const override {
+        return data(GameNameRole)
+                   .toString()
+                   .localeAwareCompare(other.data(GameNameRole).toString()) < 0;
+    }
+};
+
+class LobbyItemHost : public LobbyItem {
+public:
+    static const int HostUsernameRole = Qt::UserRole + 1;
+    static const int HostIPRole = Qt::UserRole + 2;
+    static const int HostPortRole = Qt::UserRole + 3;
+    static const int HostVerifyUIDRole = Qt::UserRole + 4;
+
+    LobbyItemHost() = default;
+    explicit LobbyItemHost(QString username, QString ip, u16 port, QString verify_UID) {
+        setData(username, HostUsernameRole);
+        setData(ip, HostIPRole);
+        setData(port, HostPortRole);
+        setData(verify_UID, HostVerifyUIDRole);
+    }
+
+    QVariant data(int role) const override {
+        if (role != Qt::DisplayRole) {
+            return LobbyItem::data(role);
+        }
+        return data(HostUsernameRole).toString();
+    }
+
+    bool operator<(const QStandardItem& other) const override {
+        return data(HostUsernameRole)
+                   .toString()
+                   .localeAwareCompare(other.data(HostUsernameRole).toString()) < 0;
+    }
+};
+
+class LobbyMember {
+public:
+    LobbyMember() = default;
+    LobbyMember(const LobbyMember& other) = default;
+    explicit LobbyMember(QString username, QString nickname, u64 title_id, QString game_name)
+        : username(std::move(username)), nickname(std::move(nickname)), title_id(title_id),
+          game_name(std::move(game_name)) {}
+    ~LobbyMember() = default;
+
+    QString GetName() const {
+        if (username.isEmpty() || username == nickname) {
+            return nickname;
+        } else {
+            return QStringLiteral("%1 (%2)").arg(nickname, username);
+        }
+    }
+    u64 GetTitleId() const {
+        return title_id;
+    }
+    QString GetGameName() const {
+        return game_name;
+    }
+
+private:
+    QString username;
+    QString nickname;
+    u64 title_id;
+    QString game_name;
+};
+
+Q_DECLARE_METATYPE(LobbyMember);
+
+class LobbyItemMemberList : public LobbyItem {
+public:
+    static const int MemberListRole = Qt::UserRole + 1;
+    static const int MaxPlayerRole = Qt::UserRole + 2;
+
+    LobbyItemMemberList() = default;
+    explicit LobbyItemMemberList(QList<QVariant> members, u32 max_players) {
+        setData(members, MemberListRole);
+        setData(max_players, MaxPlayerRole);
+    }
+
+    QVariant data(int role) const override {
+        if (role != Qt::DisplayRole) {
+            return LobbyItem::data(role);
+        }
+        auto members = data(MemberListRole).toList();
+        return QStringLiteral("%1 / %2").arg(QString::number(members.size()),
+                                             data(MaxPlayerRole).toString());
+    }
+
+    bool operator<(const QStandardItem& other) const override {
+        // sort by rooms that have the most players
+        int left_members = data(MemberListRole).toList().size();
+        int right_members = other.data(MemberListRole).toList().size();
+        return left_members < right_members;
+    }
+};
+
+/**
+ * Member information for when a lobby is expanded in the UI
+ */
+class LobbyItemExpandedMemberList : public LobbyItem {
+public:
+    static const int MemberListRole = Qt::UserRole + 1;
+
+    LobbyItemExpandedMemberList() = default;
+    explicit LobbyItemExpandedMemberList(QList<QVariant> members) {
+        setData(members, MemberListRole);
+    }
+
+    QVariant data(int role) const override {
+        if (role != Qt::DisplayRole) {
+            return LobbyItem::data(role);
+        }
+        auto members = data(MemberListRole).toList();
+        QString out;
+        bool first = true;
+        for (const auto& member : members) {
+            if (!first)
+                out.append(QStringLiteral("\n"));
+            const auto& m = member.value<LobbyMember>();
+            if (m.GetGameName().isEmpty()) {
+                out += QString(QObject::tr("%1 is not playing a game")).arg(m.GetName());
+            } else {
+                out += QString(QObject::tr("%1 is playing %2")).arg(m.GetName(), m.GetGameName());
+            }
+            first = false;
+        }
+        return out;
+    }
+};

src/yuzu/multiplayer/message.cpp

@@ -0,0 +1,79 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <QMessageBox>
+#include <QString>
+
+#include "yuzu/multiplayer/message.h"
+
+namespace NetworkMessage {
+const ConnectionError ErrorManager::USERNAME_NOT_VALID(
+    QT_TR_NOOP("Username is not valid. Must be 4 to 20 alphanumeric characters."));
+const ConnectionError ErrorManager::ROOMNAME_NOT_VALID(
+    QT_TR_NOOP("Room name is not valid. Must be 4 to 20 alphanumeric characters."));
+const ConnectionError ErrorManager::USERNAME_NOT_VALID_SERVER(
+    QT_TR_NOOP("Username is already in use or not valid. Please choose another."));
+const ConnectionError ErrorManager::IP_ADDRESS_NOT_VALID(
+    QT_TR_NOOP("IP is not a valid IPv4 address."));
+const ConnectionError ErrorManager::PORT_NOT_VALID(
+    QT_TR_NOOP("Port must be a number between 0 to 65535."));
+const ConnectionError ErrorManager::GAME_NOT_SELECTED(QT_TR_NOOP(
+    "You must choose a Preferred Game to host a room. If you do not have any games in your game "
+    "list yet, add a game folder by clicking on the plus icon in the game list."));
+const ConnectionError ErrorManager::NO_INTERNET(
+    QT_TR_NOOP("Unable to find an internet connection. Check your internet settings."));
+const ConnectionError ErrorManager::UNABLE_TO_CONNECT(
+    QT_TR_NOOP("Unable to connect to the host. Verify that the connection settings are correct. If "
+               "you still cannot connect, contact the room host and verify that the host is "
+               "properly configured with the external port forwarded."));
+const ConnectionError ErrorManager::ROOM_IS_FULL(
+    QT_TR_NOOP("Unable to connect to the room because it is already full."));
+const ConnectionError ErrorManager::COULD_NOT_CREATE_ROOM(
+    QT_TR_NOOP("Creating a room failed. Please retry. Restarting yuzu might be necessary."));
+const ConnectionError ErrorManager::HOST_BANNED(
+    QT_TR_NOOP("The host of the room has banned you. Speak with the host to unban you "
+               "or try a different room."));
+const ConnectionError ErrorManager::WRONG_VERSION(
+    QT_TR_NOOP("Version mismatch! Please update to the latest version of yuzu. If the problem "
+               "persists, contact the room host and ask them to update the server."));
+const ConnectionError ErrorManager::WRONG_PASSWORD(QT_TR_NOOP("Incorrect password."));
+const ConnectionError ErrorManager::GENERIC_ERROR(QT_TR_NOOP(
+    "An unknown error occurred. If this error continues to occur, please open an issue"));
+const ConnectionError ErrorManager::LOST_CONNECTION(
+    QT_TR_NOOP("Connection to room lost. Try to reconnect."));
+const ConnectionError ErrorManager::HOST_KICKED(
+    QT_TR_NOOP("You have been kicked by the room host."));
+const ConnectionError ErrorManager::MAC_COLLISION(
+    QT_TR_NOOP("MAC address is already in use. Please choose another."));
+const ConnectionError ErrorManager::CONSOLE_ID_COLLISION(QT_TR_NOOP(
+    "Your Console ID conflicted with someone else's in the room.\n\nPlease go to Emulation "
+    "> Configure > System to regenerate your Console ID."));
+const ConnectionError ErrorManager::PERMISSION_DENIED(
+    QT_TR_NOOP("You do not have enough permission to perform this action."));
+const ConnectionError ErrorManager::NO_SUCH_USER(QT_TR_NOOP(
+    "The user you are trying to kick/ban could not be found.\nThey may have left the room."));
+
+static bool WarnMessage(const std::string& title, const std::string& text) {
+    return QMessageBox::Ok == QMessageBox::warning(nullptr, QObject::tr(title.c_str()),
+                                                   QObject::tr(text.c_str()),
+                                                   QMessageBox::Ok | QMessageBox::Cancel);
+}
+
+void ErrorManager::ShowError(const ConnectionError& e) {
+    QMessageBox::critical(nullptr, tr("Error"), tr(e.GetString().c_str()));
+}
+
+bool WarnCloseRoom() {
+    return WarnMessage(
+        QT_TR_NOOP("Leave Room"),
+        QT_TR_NOOP("You are about to close the room. Any network connections will be closed."));
+}
+
+bool WarnDisconnect() {
+    return WarnMessage(
+        QT_TR_NOOP("Disconnect"),
+        QT_TR_NOOP("You are about to leave the room. Any network connections will be closed."));
+}
+
+} // namespace NetworkMessage

src/yuzu/multiplayer/message.h

@@ -0,0 +1,65 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <utility>
+
+namespace NetworkMessage {
+
+class ConnectionError {
+
+public:
+    explicit ConnectionError(std::string str) : err(std::move(str)) {}
+    const std::string& GetString() const {
+        return err;
+    }
+
+private:
+    std::string err;
+};
+
+class ErrorManager : QObject {
+    Q_OBJECT
+public:
+    /// When the nickname is considered invalid by the client
+    static const ConnectionError USERNAME_NOT_VALID;
+    static const ConnectionError ROOMNAME_NOT_VALID;
+    /// When the nickname is considered invalid by the room server
+    static const ConnectionError USERNAME_NOT_VALID_SERVER;
+    static const ConnectionError IP_ADDRESS_NOT_VALID;
+    static const ConnectionError PORT_NOT_VALID;
+    static const ConnectionError GAME_NOT_SELECTED;
+    static const ConnectionError NO_INTERNET;
+    static const ConnectionError UNABLE_TO_CONNECT;
+    static const ConnectionError ROOM_IS_FULL;
+    static const ConnectionError COULD_NOT_CREATE_ROOM;
+    static const ConnectionError HOST_BANNED;
+    static const ConnectionError WRONG_VERSION;
+    static const ConnectionError WRONG_PASSWORD;
+    static const ConnectionError GENERIC_ERROR;
+    static const ConnectionError LOST_CONNECTION;
+    static const ConnectionError HOST_KICKED;
+    static const ConnectionError MAC_COLLISION;
+    static const ConnectionError CONSOLE_ID_COLLISION;
+    static const ConnectionError PERMISSION_DENIED;
+    static const ConnectionError NO_SUCH_USER;
+    /**
+     *  Shows a standard QMessageBox with a error message
+     */
+    static void ShowError(const ConnectionError& e);
+};
+/**
+ * Show a standard QMessageBox with a warning message about leaving the room
+ * return true if the user wants to close the network connection
+ */
+bool WarnCloseRoom();
+
+/**
+ * Show a standard QMessageBox with a warning message about disconnecting from the room
+ * return true if the user wants to disconnect
+ */
+bool WarnDisconnect();
+
+} // namespace NetworkMessage

src/yuzu/multiplayer/moderation_dialog.cpp

@@ -0,0 +1,113 @@
+// Copyright 2018 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <QStandardItem>
+#include <QStandardItemModel>
+#include "network/network.h"
+#include "network/room_member.h"
+#include "ui_moderation_dialog.h"
+#include "yuzu/multiplayer/moderation_dialog.h"
+
+namespace Column {
+enum {
+    SUBJECT,
+    TYPE,
+    COUNT,
+};
+}
+
+ModerationDialog::ModerationDialog(QWidget* parent)
+    : QDialog(parent), ui(std::make_unique<Ui::ModerationDialog>()) {
+    ui->setupUi(this);
+
+    qRegisterMetaType<Network::Room::BanList>();
+
+    if (auto member = Network::GetRoomMember().lock()) {
+        callback_handle_status_message = member->BindOnStatusMessageReceived(
+            [this](const Network::StatusMessageEntry& status_message) {
+                emit StatusMessageReceived(status_message);
+            });
+        connect(this, &ModerationDialog::StatusMessageReceived, this,
+                &ModerationDialog::OnStatusMessageReceived);
+        callback_handle_ban_list = member->BindOnBanListReceived(
+            [this](const Network::Room::BanList& ban_list) { emit BanListReceived(ban_list); });
+        connect(this, &ModerationDialog::BanListReceived, this, &ModerationDialog::PopulateBanList);
+    }
+
+    // Initialize the UI
+    model = new QStandardItemModel(ui->ban_list_view);
+    model->insertColumns(0, Column::COUNT);
+    model->setHeaderData(Column::SUBJECT, Qt::Horizontal, tr("Subject"));
+    model->setHeaderData(Column::TYPE, Qt::Horizontal, tr("Type"));
+
+    ui->ban_list_view->setModel(model);
+
+    // Load the ban list in background
+    LoadBanList();
+
+    connect(ui->refresh, &QPushButton::clicked, this, [this] { LoadBanList(); });
+    connect(ui->unban, &QPushButton::clicked, this, [this] {
+        auto index = ui->ban_list_view->currentIndex();
+        SendUnbanRequest(model->item(index.row(), 0)->text());
+    });
+    connect(ui->ban_list_view, &QTreeView::clicked, [this] { ui->unban->setEnabled(true); });
+}
+
+ModerationDialog::~ModerationDialog() {
+    if (callback_handle_status_message) {
+        if (auto room = Network::GetRoomMember().lock()) {
+            room->Unbind(callback_handle_status_message);
+        }
+    }
+
+    if (callback_handle_ban_list) {
+        if (auto room = Network::GetRoomMember().lock()) {
+            room->Unbind(callback_handle_ban_list);
+        }
+    }
+}
+
+void ModerationDialog::LoadBanList() {
+    if (auto room = Network::GetRoomMember().lock()) {
+        ui->refresh->setEnabled(false);
+        ui->refresh->setText(tr("Refreshing"));
+        ui->unban->setEnabled(false);
+        room->RequestBanList();
+    }
+}
+
+void ModerationDialog::PopulateBanList(const Network::Room::BanList& ban_list) {
+    model->removeRows(0, model->rowCount());
+    for (const auto& username : ban_list.first) {
+        QStandardItem* subject_item = new QStandardItem(QString::fromStdString(username));
+        QStandardItem* type_item = new QStandardItem(tr("Forum Username"));
+        model->invisibleRootItem()->appendRow({subject_item, type_item});
+    }
+    for (const auto& ip : ban_list.second) {
+        QStandardItem* subject_item = new QStandardItem(QString::fromStdString(ip));
+        QStandardItem* type_item = new QStandardItem(tr("IP Address"));
+        model->invisibleRootItem()->appendRow({subject_item, type_item});
+    }
+    for (int i = 0; i < Column::COUNT - 1; ++i) {
+        ui->ban_list_view->resizeColumnToContents(i);
+    }
+    ui->refresh->setEnabled(true);
+    ui->refresh->setText(tr("Refresh"));
+    ui->unban->setEnabled(false);
+}
+
+void ModerationDialog::SendUnbanRequest(const QString& subject) {
+    if (auto room = Network::GetRoomMember().lock()) {
+        room->SendModerationRequest(Network::IdModUnban, subject.toStdString());
+    }
+}
+
+void ModerationDialog::OnStatusMessageReceived(const Network::StatusMessageEntry& status_message) {
+    if (status_message.type != Network::IdMemberBanned &&
+        status_message.type != Network::IdAddressUnbanned)
+        return;
+
+    // Update the ban list for ban/unban
+    LoadBanList();
+}

src/yuzu/multiplayer/moderation_dialog.h

@@ -0,0 +1,42 @@
+// Copyright 2018 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <optional>
+#include <QDialog>
+#include "network/room.h"
+#include "network/room_member.h"
+
+namespace Ui {
+class ModerationDialog;
+}
+
+class QStandardItemModel;
+
+class ModerationDialog : public QDialog {
+    Q_OBJECT
+
+public:
+    explicit ModerationDialog(QWidget* parent = nullptr);
+    ~ModerationDialog();
+
+signals:
+    void StatusMessageReceived(const Network::StatusMessageEntry&);
+    void BanListReceived(const Network::Room::BanList&);
+
+private:
+    void LoadBanList();
+    void PopulateBanList(const Network::Room::BanList& ban_list);
+    void SendUnbanRequest(const QString& subject);
+    void OnStatusMessageReceived(const Network::StatusMessageEntry& status_message);
+
+    std::unique_ptr<Ui::ModerationDialog> ui;
+    QStandardItemModel* model;
+    Network::RoomMember::CallbackHandle<Network::StatusMessageEntry> callback_handle_status_message;
+    Network::RoomMember::CallbackHandle<Network::Room::BanList> callback_handle_ban_list;
+};
+
+Q_DECLARE_METATYPE(Network::Room::BanList);

src/yuzu/multiplayer/moderation_dialog.ui

@@ -0,0 +1,84 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>ModerationDialog</class>
+ <widget class="QDialog" name="ModerationDialog">
+  <property name="windowTitle">
+   <string>Moderation</string>
+  </property>
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>500</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <layout class="QVBoxLayout">
+   <item>
+    <widget class="QGroupBox" name="ban_list_group_box">
+     <property name="title">
+      <string>Ban List</string>
+     </property>
+     <layout class="QVBoxLayout">
+      <item>
+       <layout class="QHBoxLayout">
+        <item>
+         <spacer name="horizontalSpacer">
+          <property name="orientation">
+           <enum>Qt::Horizontal</enum>
+          </property>
+          <property name="sizeHint" stdset="0">
+           <size>
+            <width>40</width>
+            <height>20</height>
+           </size>
+          </property>
+         </spacer>
+        </item>
+        <item>
+         <widget class="QPushButton" name="refresh">
+          <property name="text">
+           <string>Refreshing</string>
+          </property>
+          <property name="enabled">
+           <bool>false</bool>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QPushButton" name="unban">
+          <property name="text">
+           <string>Unban</string>
+          </property>
+          <property name="enabled">
+           <bool>false</bool>
+          </property>
+         </widget>
+        </item>
+       </layout>
+      </item>
+      <item>
+       <widget class="QTreeView" name="ban_list_view"/>
+      </item>
+     </layout>
+    </widget>
+   </item>
+   <item>
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Ok</set>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>ModerationDialog</receiver>
+   <slot>accept()</slot>
+  </connection>
+ </connections>
+ <resources/>
+</ui>

src/yuzu/multiplayer/state.cpp

@@ -0,0 +1,299 @@
+// Copyright 2018 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <QAction>
+#include <QApplication>
+#include <QIcon>
+#include <QMessageBox>
+#include <QStandardItemModel>
+#include "common/announce_multiplayer_room.h"
+#include "common/logging/log.h"
+#include "yuzu/game_list.h"
+#include "yuzu/multiplayer/client_room.h"
+#include "yuzu/multiplayer/direct_connect.h"
+#include "yuzu/multiplayer/host_room.h"
+#include "yuzu/multiplayer/lobby.h"
+#include "yuzu/multiplayer/message.h"
+#include "yuzu/multiplayer/state.h"
+#include "yuzu/uisettings.h"
+#include "yuzu/util/clickable_label.h"
+
+MultiplayerState::MultiplayerState(QWidget* parent, QStandardItemModel* game_list_model,
+                                   QAction* leave_room, QAction* show_room)
+    : QWidget(parent), game_list_model(game_list_model), leave_room(leave_room),
+      show_room(show_room) {
+    if (auto member = Network::GetRoomMember().lock()) {
+        // register the network structs to use in slots and signals
+        state_callback_handle = member->BindOnStateChanged(
+            [this](const Network::RoomMember::State& state) { emit NetworkStateChanged(state); });
+        connect(this, &MultiplayerState::NetworkStateChanged, this,
+                &MultiplayerState::OnNetworkStateChanged);
+        error_callback_handle = member->BindOnError(
+            [this](const Network::RoomMember::Error& error) { emit NetworkError(error); });
+        connect(this, &MultiplayerState::NetworkError, this, &MultiplayerState::OnNetworkError);
+    }
+
+    qRegisterMetaType<Network::RoomMember::State>();
+    qRegisterMetaType<Network::RoomMember::Error>();
+    qRegisterMetaType<WebService::WebResult>();
+    announce_multiplayer_session = std::make_shared<Core::AnnounceMultiplayerSession>();
+    announce_multiplayer_session->BindErrorCallback(
+        [this](const WebService::WebResult& result) { emit AnnounceFailed(result); });
+    connect(this, &MultiplayerState::AnnounceFailed, this, &MultiplayerState::OnAnnounceFailed);
+
+    status_text = new ClickableLabel(this);
+    status_icon = new ClickableLabel(this);
+    status_text->setToolTip(tr("Current connection status"));
+    status_text->setText(tr("Not Connected. Click here to find a room!"));
+    status_icon->setPixmap(QIcon::fromTheme(QStringLiteral("disconnected")).pixmap(16));
+
+    connect(status_text, &ClickableLabel::clicked, this, &MultiplayerState::OnOpenNetworkRoom);
+    connect(status_icon, &ClickableLabel::clicked, this, &MultiplayerState::OnOpenNetworkRoom);
+
+    connect(static_cast<QApplication*>(QApplication::instance()), &QApplication::focusChanged, this,
+            [this](QWidget* /*old*/, QWidget* now) {
+                if (client_room && client_room->isAncestorOf(now)) {
+                    HideNotification();
+                }
+            });
+}
+
+MultiplayerState::~MultiplayerState() {
+    if (state_callback_handle) {
+        if (auto member = Network::GetRoomMember().lock()) {
+            member->Unbind(state_callback_handle);
+        }
+    }
+
+    if (error_callback_handle) {
+        if (auto member = Network::GetRoomMember().lock()) {
+            member->Unbind(error_callback_handle);
+        }
+    }
+}
+
+void MultiplayerState::Close() {
+    if (host_room)
+        host_room->close();
+    if (direct_connect)
+        direct_connect->close();
+    if (client_room)
+        client_room->close();
+    if (lobby)
+        lobby->close();
+}
+
+void MultiplayerState::retranslateUi() {
+    status_text->setToolTip(tr("Current connection status"));
+
+    if (current_state == Network::RoomMember::State::Uninitialized) {
+        status_text->setText(tr("Not Connected. Click here to find a room!"));
+    } else if (current_state == Network::RoomMember::State::Joined ||
+               current_state == Network::RoomMember::State::Moderator) {
+
+        status_text->setText(tr("Connected"));
+    } else {
+        status_text->setText(tr("Not Connected"));
+    }
+
+    if (lobby)
+        lobby->RetranslateUi();
+    if (host_room)
+        host_room->RetranslateUi();
+    if (client_room)
+        client_room->RetranslateUi();
+    if (direct_connect)
+        direct_connect->RetranslateUi();
+}
+
+void MultiplayerState::OnNetworkStateChanged(const Network::RoomMember::State& state) {
+    LOG_DEBUG(Frontend, "Network State: {}", Network::GetStateStr(state));
+    if (state == Network::RoomMember::State::Joined ||
+        state == Network::RoomMember::State::Moderator) {
+
+        OnOpenNetworkRoom();
+        status_icon->setPixmap(QIcon::fromTheme(QStringLiteral("connected")).pixmap(16));
+        status_text->setText(tr("Connected"));
+        leave_room->setEnabled(true);
+        show_room->setEnabled(true);
+    } else {
+        status_icon->setPixmap(QIcon::fromTheme(QStringLiteral("disconnected")).pixmap(16));
+        status_text->setText(tr("Not Connected"));
+        leave_room->setEnabled(false);
+        show_room->setEnabled(false);
+    }
+
+    current_state = state;
+}
+
+void MultiplayerState::OnNetworkError(const Network::RoomMember::Error& error) {
+    LOG_DEBUG(Frontend, "Network Error: {}", Network::GetErrorStr(error));
+    switch (error) {
+    case Network::RoomMember::Error::LostConnection:
+        NetworkMessage::ErrorManager::ShowError(NetworkMessage::ErrorManager::LOST_CONNECTION);
+        break;
+    case Network::RoomMember::Error::HostKicked:
+        NetworkMessage::ErrorManager::ShowError(NetworkMessage::ErrorManager::HOST_KICKED);
+        break;
+    case Network::RoomMember::Error::CouldNotConnect:
+        NetworkMessage::ErrorManager::ShowError(NetworkMessage::ErrorManager::UNABLE_TO_CONNECT);
+        break;
+    case Network::RoomMember::Error::NameCollision:
+        NetworkMessage::ErrorManager::ShowError(
+            NetworkMessage::ErrorManager::USERNAME_NOT_VALID_SERVER);
+        break;
+    case Network::RoomMember::Error::MacCollision:
+        NetworkMessage::ErrorManager::ShowError(NetworkMessage::ErrorManager::MAC_COLLISION);
+        break;
+    case Network::RoomMember::Error::ConsoleIdCollision:
+        NetworkMessage::ErrorManager::ShowError(NetworkMessage::ErrorManager::CONSOLE_ID_COLLISION);
+        break;
+    case Network::RoomMember::Error::RoomIsFull:
+        NetworkMessage::ErrorManager::ShowError(NetworkMessage::ErrorManager::ROOM_IS_FULL);
+        break;
+    case Network::RoomMember::Error::WrongPassword:
+        NetworkMessage::ErrorManager::ShowError(NetworkMessage::ErrorManager::WRONG_PASSWORD);
+        break;
+    case Network::RoomMember::Error::WrongVersion:
+        NetworkMessage::ErrorManager::ShowError(NetworkMessage::ErrorManager::WRONG_VERSION);
+        break;
+    case Network::RoomMember::Error::HostBanned:
+        NetworkMessage::ErrorManager::ShowError(NetworkMessage::ErrorManager::HOST_BANNED);
+        break;
+    case Network::RoomMember::Error::UnknownError:
+        NetworkMessage::ErrorManager::ShowError(NetworkMessage::ErrorManager::UNABLE_TO_CONNECT);
+        break;
+    case Network::RoomMember::Error::PermissionDenied:
+        NetworkMessage::ErrorManager::ShowError(NetworkMessage::ErrorManager::PERMISSION_DENIED);
+        break;
+    case Network::RoomMember::Error::NoSuchUser:
+        NetworkMessage::ErrorManager::ShowError(NetworkMessage::ErrorManager::NO_SUCH_USER);
+        break;
+    }
+}
+
+void MultiplayerState::OnAnnounceFailed(const WebService::WebResult& result) {
+    announce_multiplayer_session->Stop();
+    QMessageBox::warning(this, tr("Error"),
+                         tr("Failed to update the room information. Please check your Internet "
+                            "connection and try hosting the room again.\nDebug Message: ") +
+                             QString::fromStdString(result.result_string),
+                         QMessageBox::Ok);
+}
+
+void MultiplayerState::UpdateThemedIcons() {
+    if (show_notification) {
+        status_icon->setPixmap(
+            QIcon::fromTheme(QStringLiteral("connected_notification")).pixmap(16));
+    } else if (current_state == Network::RoomMember::State::Joined ||
+               current_state == Network::RoomMember::State::Moderator) {
+
+        status_icon->setPixmap(QIcon::fromTheme(QStringLiteral("connected")).pixmap(16));
+    } else {
+        status_icon->setPixmap(QIcon::fromTheme(QStringLiteral("disconnected")).pixmap(16));
+    }
+    if (client_room)
+        client_room->UpdateIconDisplay();
+}
+
+static void BringWidgetToFront(QWidget* widget) {
+    widget->show();
+    widget->activateWindow();
+    widget->raise();
+}
+
+void MultiplayerState::OnViewLobby() {
+    if (lobby == nullptr) {
+        lobby = new Lobby(this, game_list_model, announce_multiplayer_session);
+    }
+    BringWidgetToFront(lobby);
+}
+
+void MultiplayerState::OnCreateRoom() {
+    if (host_room == nullptr) {
+        host_room = new HostRoomWindow(this, game_list_model, announce_multiplayer_session);
+    }
+    BringWidgetToFront(host_room);
+}
+
+bool MultiplayerState::OnCloseRoom() {
+    if (!NetworkMessage::WarnCloseRoom())
+        return false;
+    if (auto room = Network::GetRoom().lock()) {
+        // if you are in a room, leave it
+        if (auto member = Network::GetRoomMember().lock()) {
+            member->Leave();
+            LOG_DEBUG(Frontend, "Left the room (as a client)");
+        }
+
+        // if you are hosting a room, also stop hosting
+        if (room->GetState() != Network::Room::State::Open) {
+            return true;
+        }
+        // Save ban list
+        UISettings::values.ban_list = std::move(room->GetBanList());
+
+        room->Destroy();
+        announce_multiplayer_session->Stop();
+        LOG_DEBUG(Frontend, "Closed the room (as a server)");
+    }
+    return true;
+}
+
+void MultiplayerState::ShowNotification() {
+    if (client_room && client_room->isAncestorOf(QApplication::focusWidget()))
+        return; // Do not show notification if the chat window currently has focus
+    show_notification = true;
+    QApplication::alert(nullptr);
+    status_icon->setPixmap(QIcon::fromTheme(QStringLiteral("connected_notification")).pixmap(16));
+    status_text->setText(tr("New Messages Received"));
+}
+
+void MultiplayerState::HideNotification() {
+    show_notification = false;
+    status_icon->setPixmap(QIcon::fromTheme(QStringLiteral("connected")).pixmap(16));
+    status_text->setText(tr("Connected"));
+}
+
+void MultiplayerState::OnOpenNetworkRoom() {
+    if (auto member = Network::GetRoomMember().lock()) {
+        if (member->IsConnected()) {
+            if (client_room == nullptr) {
+                client_room = new ClientRoomWindow(this);
+                connect(client_room, &ClientRoomWindow::ShowNotification, this,
+                        &MultiplayerState::ShowNotification);
+            }
+            BringWidgetToFront(client_room);
+            return;
+        }
+    }
+    // If the user is not a member of a room, show the lobby instead.
+    // This is currently only used on the clickable label in the status bar
+    OnViewLobby();
+}
+
+void MultiplayerState::OnDirectConnectToRoom() {
+    if (direct_connect == nullptr) {
+        direct_connect = new DirectConnectWindow(this);
+    }
+    BringWidgetToFront(direct_connect);
+}
+
+bool MultiplayerState::IsHostingPublicRoom() const {
+    return announce_multiplayer_session->IsRunning();
+}
+
+void MultiplayerState::UpdateCredentials() {
+    announce_multiplayer_session->UpdateCredentials();
+}
+
+void MultiplayerState::UpdateGameList(QStandardItemModel* game_list) {
+    game_list_model = game_list;
+    if (lobby) {
+        lobby->UpdateGameList(game_list);
+    }
+    if (host_room) {
+        host_room->UpdateGameList(game_list);
+    }
+}

src/yuzu/multiplayer/state.h

@@ -0,0 +1,92 @@
+// Copyright 2018 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <QWidget>
+#include "core/announce_multiplayer_session.h"
+#include "network/network.h"
+
+class QStandardItemModel;
+class Lobby;
+class HostRoomWindow;
+class ClientRoomWindow;
+class DirectConnectWindow;
+class ClickableLabel;
+
+class MultiplayerState : public QWidget {
+    Q_OBJECT;
+
+public:
+    explicit MultiplayerState(QWidget* parent, QStandardItemModel* game_list, QAction* leave_room,
+                              QAction* show_room);
+    ~MultiplayerState();
+
+    /**
+     * Close all open multiplayer related dialogs
+     */
+    void Close();
+
+    ClickableLabel* GetStatusText() const {
+        return status_text;
+    }
+
+    ClickableLabel* GetStatusIcon() const {
+        return status_icon;
+    }
+
+    void retranslateUi();
+
+    /**
+     * Whether a public room is being hosted or not.
+     * When this is true, Web Services configuration should be disabled.
+     */
+    bool IsHostingPublicRoom() const;
+
+    void UpdateCredentials();
+
+    /**
+     * Updates the multiplayer dialogs with a new game list model.
+     * This model should be the original model of the game list.
+     */
+    void UpdateGameList(QStandardItemModel* game_list);
+
+public slots:
+    void OnNetworkStateChanged(const Network::RoomMember::State& state);
+    void OnNetworkError(const Network::RoomMember::Error& error);
+    void OnViewLobby();
+    void OnCreateRoom();
+    bool OnCloseRoom();
+    void OnOpenNetworkRoom();
+    void OnDirectConnectToRoom();
+    void OnAnnounceFailed(const WebService::WebResult&);
+    void UpdateThemedIcons();
+    void ShowNotification();
+    void HideNotification();
+
+signals:
+    void NetworkStateChanged(const Network::RoomMember::State&);
+    void NetworkError(const Network::RoomMember::Error&);
+    void AnnounceFailed(const WebService::WebResult&);
+
+private:
+    Lobby* lobby = nullptr;
+    HostRoomWindow* host_room = nullptr;
+    ClientRoomWindow* client_room = nullptr;
+    DirectConnectWindow* direct_connect = nullptr;
+    ClickableLabel* status_icon = nullptr;
+    ClickableLabel* status_text = nullptr;
+    QStandardItemModel* game_list_model = nullptr;
+    QAction* leave_room;
+    QAction* show_room;
+    std::shared_ptr<Core::AnnounceMultiplayerSession> announce_multiplayer_session;
+    Network::RoomMember::State current_state = Network::RoomMember::State::Uninitialized;
+    bool has_mod_perms = false;
+    Network::RoomMember::CallbackHandle<Network::RoomMember::State> state_callback_handle;
+    Network::RoomMember::CallbackHandle<Network::RoomMember::Error> error_callback_handle;
+
+    bool show_notification = false;
+};
+
+Q_DECLARE_METATYPE(WebService::WebResult);

src/yuzu/multiplayer/validation.h

@@ -0,0 +1,49 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <QRegExp>
+#include <QString>
+#include <QValidator>
+
+class Validation {
+public:
+    Validation()
+        : room_name(room_name_regex), nickname(nickname_regex), ip(ip_regex), port(0, 65535) {}
+
+    ~Validation() = default;
+
+    const QValidator* GetRoomName() const {
+        return &room_name;
+    }
+    const QValidator* GetNickname() const {
+        return &nickname;
+    }
+    const QValidator* GetIP() const {
+        return &ip;
+    }
+    const QValidator* GetPort() const {
+        return &port;
+    }
+
+private:
+    /// room name can be alphanumeric and " " "_" "." and "-" and must have a size of 4-20
+    QRegExp room_name_regex = QRegExp(QStringLiteral("^[a-zA-Z0-9._- ]{4,20}$"));
+    QRegExpValidator room_name;
+
+    /// nickname can be alphanumeric and " " "_" "." and "-" and must have a size of 4-20
+    QRegExp nickname_regex = QRegExp(QStringLiteral("^[a-zA-Z0-9._- ]{4,20}$"));
+    QRegExpValidator nickname;
+
+    /// ipv4 address only
+    // TODO remove this when we support hostnames in direct connect
+    QRegExp ip_regex = QRegExp(QStringLiteral(
+        "(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|"
+        "2[0-4][0-9]|25[0-5])"));
+    QRegExpValidator ip;
+
+    /// port must be between 0 and 65535
+    QIntValidator port;
+};

src/yuzu/uisettings.h

@@ -102,6 +102,19 @@ struct Values {
 
     Settings::Setting<uint32_t> callout_flags{0, "calloutFlags"};
 
+    // multiplayer settings
+    QString nickname;
+    QString ip;
+    QString port;
+    QString room_nickname;
+    QString room_name;
+    quint32 max_player;
+    QString room_port;
+    uint host_type;
+    qulonglong game_id;
+    QString room_description;
+    std::pair<std::vector<std::string>, std::vector<std::string>> ban_list;
+
     // logging
     Settings::Setting<bool> show_console{false, "showConsole"};
 

src/yuzu/util/clickable_label.cpp

@@ -0,0 +1,12 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "yuzu/util/clickable_label.h"
+
+ClickableLabel::ClickableLabel(QWidget* parent, [[maybe_unused]] Qt::WindowFlags f)
+    : QLabel(parent) {}
+
+void ClickableLabel::mouseReleaseEvent([[maybe_unused]] QMouseEvent* event) {
+    emit clicked();
+}

src/yuzu/util/clickable_label.h

@@ -0,0 +1,22 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <QLabel>
+#include <QWidget>
+
+class ClickableLabel : public QLabel {
+    Q_OBJECT
+
+public:
+    explicit ClickableLabel(QWidget* parent = nullptr, Qt::WindowFlags f = Qt::WindowFlags());
+    ~ClickableLabel() = default;
+
+signals:
+    void clicked();
+
+protected:
+    void mouseReleaseEvent(QMouseEvent* event);
+};

src/yuzu_cmd/yuzu.cpp

@@ -5,6 +5,7 @@
 #include <chrono>
 #include <iostream>
 #include <memory>
+#include <regex>
 #include <string>
 #include <thread>
 
@@ -29,6 +30,7 @@
 #include "core/loader/loader.h"
 #include "core/telemetry_session.h"
 #include "input_common/main.h"
+#include "network/network.h"
 #include "video_core/renderer_base.h"
 #include "yuzu_cmd/config.h"
 #include "yuzu_cmd/emu_window/emu_window_sdl2.h"
@@ -60,6 +62,8 @@ __declspec(dllexport) int AmdPowerXpressRequestHighPerformance = 1;
 static void PrintHelp(const char* argv0) {
     std::cout << "Usage: " << argv0
               << " [options] <filename>\n"
+                 "-m, --multiplayer=nick:password@address:port"
+                 " Nickname, password, address and port for multiplayer\n"
                  "-f, --fullscreen      Start in fullscreen mode\n"
                  "-h, --help            Display this help and exit\n"
                  "-v, --version         Output version information and exit\n"
@@ -71,6 +75,107 @@ static void PrintVersion() {
     std::cout << "yuzu " << Common::g_scm_branch << " " << Common::g_scm_desc << std::endl;
 }
 
+static void OnStateChanged(const Network::RoomMember::State& state) {
+    switch (state) {
+    case Network::RoomMember::State::Idle:
+        LOG_DEBUG(Network, "Network is idle");
+        break;
+    case Network::RoomMember::State::Joining:
+        LOG_DEBUG(Network, "Connection sequence to room started");
+        break;
+    case Network::RoomMember::State::Joined:
+        LOG_DEBUG(Network, "Successfully joined to the room");
+        break;
+    case Network::RoomMember::State::Moderator:
+        LOG_DEBUG(Network, "Successfully joined the room as a moderator");
+        break;
+    default:
+        break;
+    }
+}
+
+static void OnNetworkError(const Network::RoomMember::Error& error) {
+    switch (error) {
+    case Network::RoomMember::Error::LostConnection:
+        LOG_DEBUG(Network, "Lost connection to the room");
+        break;
+    case Network::RoomMember::Error::CouldNotConnect:
+        LOG_ERROR(Network, "Error: Could not connect");
+        exit(1);
+        break;
+    case Network::RoomMember::Error::NameCollision:
+        LOG_ERROR(
+            Network,
+            "You tried to use the same nickname as another user that is connected to the Room");
+        exit(1);
+        break;
+    case Network::RoomMember::Error::MacCollision:
+        LOG_ERROR(Network, "You tried to use the same MAC-Address as another user that is "
+                           "connected to the Room");
+        exit(1);
+        break;
+    case Network::RoomMember::Error::ConsoleIdCollision:
+        LOG_ERROR(Network, "Your Console ID conflicted with someone else in the Room");
+        exit(1);
+        break;
+    case Network::RoomMember::Error::WrongPassword:
+        LOG_ERROR(Network, "Room replied with: Wrong password");
+        exit(1);
+        break;
+    case Network::RoomMember::Error::WrongVersion:
+        LOG_ERROR(Network,
+                  "You are using a different version than the room you are trying to connect to");
+        exit(1);
+        break;
+    case Network::RoomMember::Error::RoomIsFull:
+        LOG_ERROR(Network, "The room is full");
+        exit(1);
+        break;
+    case Network::RoomMember::Error::HostKicked:
+        LOG_ERROR(Network, "You have been kicked by the host");
+        break;
+    case Network::RoomMember::Error::HostBanned:
+        LOG_ERROR(Network, "You have been banned by the host");
+        break;
+    case Network::RoomMember::Error::UnknownError:
+        LOG_ERROR(Network, "UnknownError");
+        break;
+    case Network::RoomMember::Error::PermissionDenied:
+        LOG_ERROR(Network, "PermissionDenied");
+        break;
+    case Network::RoomMember::Error::NoSuchUser:
+        LOG_ERROR(Network, "NoSuchUser");
+        break;
+    }
+}
+
+static void OnMessageReceived(const Network::ChatEntry& msg) {
+    std::cout << std::endl << msg.nickname << ": " << msg.message << std::endl << std::endl;
+}
+
+static void OnStatusMessageReceived(const Network::StatusMessageEntry& msg) {
+    std::string message;
+    switch (msg.type) {
+    case Network::IdMemberJoin:
+        message = fmt::format("{} has joined", msg.nickname);
+        break;
+    case Network::IdMemberLeave:
+        message = fmt::format("{} has left", msg.nickname);
+        break;
+    case Network::IdMemberKicked:
+        message = fmt::format("{} has been kicked", msg.nickname);
+        break;
+    case Network::IdMemberBanned:
+        message = fmt::format("{} has been banned", msg.nickname);
+        break;
+    case Network::IdAddressUnbanned:
+        message = fmt::format("{} has been unbanned", msg.nickname);
+        break;
+    }
+    if (!message.empty())
+        std::cout << std::endl << "* " << message << std::endl << std::endl;
+}
+
 /// Application entry point
 int main(int argc, char** argv) {
     Common::Log::Initialize();
@@ -92,10 +197,16 @@ int main(int argc, char** argv) {
     std::optional<std::string> config_path;
     std::string program_args;
 
+    bool use_multiplayer = false;
     bool fullscreen = false;
+    std::string nickname{};
+    std::string password{};
+    std::string address{};
+    u16 port = Network::DefaultRoomPort;
 
     static struct option long_options[] = {
         // clang-format off
+        {"multiplayer", required_argument, 0, 'm'},
         {"fullscreen", no_argument, 0, 'f'},
         {"help", no_argument, 0, 'h'},
         {"version", no_argument, 0, 'v'},
@@ -109,6 +220,38 @@ int main(int argc, char** argv) {
         int arg = getopt_long(argc, argv, "g:fhvp::c:", long_options, &option_index);
         if (arg != -1) {
             switch (static_cast<char>(arg)) {
+            case 'm': {
+                use_multiplayer = true;
+                const std::string str_arg(optarg);
+                // regex to check if the format is nickname:password@ip:port
+                // with optional :password
+                const std::regex re("^([^:]+)(?::(.+))?@([^:]+)(?::([0-9]+))?$");
+                if (!std::regex_match(str_arg, re)) {
+                    std::cout << "Wrong format for option --multiplayer\n";
+                    PrintHelp(argv[0]);
+                    return 0;
+                }
+
+                std::smatch match;
+                std::regex_search(str_arg, match, re);
+                ASSERT(match.size() == 5);
+                nickname = match[1];
+                password = match[2];
+                address = match[3];
+                if (!match[4].str().empty())
+                    port = std::stoi(match[4]);
+                std::regex nickname_re("^[a-zA-Z0-9._\\- ]+$");
+                if (!std::regex_match(nickname, nickname_re)) {
+                    std::cout
+                        << "Nickname is not valid. Must be 4 to 20 alphanumeric characters.\n";
+                    return 0;
+                }
+                if (address.empty()) {
+                    std::cout << "Address to room must not be empty.\n";
+                    return 0;
+                }
+                break;
+            }
             case 'f':
                 fullscreen = true;
                 LOG_INFO(Frontend, "Starting in fullscreen mode...");
@@ -215,6 +358,21 @@ int main(int argc, char** argv) {
 
     system.TelemetrySession().AddField(Common::Telemetry::FieldType::App, "Frontend", "SDL");
 
+    if (use_multiplayer) {
+        if (auto member = Network::GetRoomMember().lock()) {
+            member->BindOnChatMessageRecieved(OnMessageReceived);
+            member->BindOnStatusMessageReceived(OnStatusMessageReceived);
+            member->BindOnStateChanged(OnStateChanged);
+            member->BindOnError(OnNetworkError);
+            LOG_DEBUG(Network, "Start connection to {}:{} with nickname {}", address, port,
+                      nickname);
+            member->Join(nickname, "", address.c_str(), port, 0, Network::NoPreferredMac, password);
+        } else {
+            LOG_ERROR(Network, "Could not access RoomMember");
+            return 0;
+        }
+    }
+
     // Core is loaded, start the GPU (makes the GPU contexts current to this thread)
     system.GPU().Start();
     system.GetCpuManager().OnGpuReady();