Network: Added an executable to host an dedicated room for local wifi

src/CMakeLists.txt

@@ -17,3 +17,4 @@ endif()
 if (ENABLE_WEB_SERVICE)
     add_subdirectory(web_service)
 endif()
+add_subdirectory(dedicated_room)

src/dedicated_room/CMakeLists.txt

@@ -0,0 +1,20 @@
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${PROJECT_SOURCE_DIR}/CMakeModules)
+
+set(SRCS
+            citra-room.cpp
+            citra-room.rc
+            )
+
+create_directory_groups(${SRCS})
+
+add_executable(citra-room ${SRCS})
+target_link_libraries(citra-room PRIVATE common core network)
+target_link_libraries(citra-room PRIVATE glad)
+if (MSVC)
+    target_link_libraries(citra-room PRIVATE getopt)
+endif()
+target_link_libraries(citra-room PRIVATE ${PLATFORM_LIBRARIES} SDL2 Threads::Threads)
+
+if(UNIX AND NOT APPLE)
+    install(TARGETS citra-room RUNTIME DESTINATION "${CMAKE_INSTALL_PREFIX}/bin")
+endif()

src/dedicated_room/citra-room.cpp

@@ -0,0 +1,223 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <chrono>
+#include <iostream>
+#include <memory>
+#include <regex>
+#include <string>
+#include <thread>
+#define SDL_MAIN_HANDLED
+#include <SDL.h>
+#include <glad/glad.h>
+
+#ifdef _MSC_VER
+#include <getopt.h>
+#else
+#include <getopt.h>
+#include <unistd.h>
+#endif
+
+#ifdef _WIN32
+// windows.h needs to be included before shellapi.h
+#include <windows.h>
+
+#include <shellapi.h>
+#endif
+
+#include "common/common_types.h"
+#include "common/scm_rev.h"
+#include "core/announce_multiplayer_session.h"
+#include "core/core.h"
+#include "core/settings.h"
+#include "network/network.h"
+
+static void PrintHelp(const char* argv0) {
+    std::cout << "Usage: " << argv0
+              << " [options] <filename>\n"
+                 "--room-name         The name of the room\n"
+                 "--port              The port used for the room\n"
+                 "--max_members       The maximum number of players for this room\n"
+                 "--password          The password for the room\n"
+                 "--preferred-game    The prefered game for this room\n"
+                 "--preferred-game-id The prefered game-id for this room\n"
+                 "--username          The username used for announce\n"
+                 "--token             The token used for announce\n"
+                 "--announce-url      The url to the announce server"
+                 "-h, --help          Display this help and exit\n"
+                 "-v, --version       Output version information and exit\n";
+}
+
+static void PrintVersion() {
+    std::cout << "Citra dedicated room " << Common::g_scm_branch << " " << Common::g_scm_desc
+              << " Libnetwork: " << Network::network_version << std::endl;
+}
+
+/// Application entry point
+int main(int argc, char** argv) {
+    int option_index = 0;
+    char* endarg;
+#ifdef _WIN32
+    int argc_w;
+    auto argv_w = CommandLineToArgvW(GetCommandLineW(), &argc_w);
+
+    if (argv_w == nullptr) {
+        LOG_CRITICAL(Frontend, "Failed to get command line arguments");
+        return -1;
+    }
+#endif
+
+    // This is just to be able to link against core
+    gladLoadGLLoader(static_cast<GLADloadproc>(SDL_GL_GetProcAddress));
+
+    std::string room_name;
+    std::string password;
+    std::string preferred_game;
+    std::string username;
+    std::string token;
+    std::string announce_url;
+    u64 preferred_game_id = 0;
+    u16 port = Network::DefaultRoomPort;
+    u32 max_members = 16;
+
+    static struct option long_options[] = {
+        {"room-name", required_argument, 0, 'n'},
+        {"port", required_argument, 0, 'p'},
+        {"max_members", required_argument, 0, 'm'},
+        {"password", required_argument, 0, 'w'},
+        {"preferred-game", required_argument, 0, 'g'},
+        {"preferred-game-id", required_argument, 0, 'i'},
+        {"username", required_argument, 0, 'u'},
+        {"token", required_argument, 0, 't'},
+        {"announce-url", required_argument, 0, 'a'},
+        {"help", no_argument, 0, 'h'},
+        {"version", no_argument, 0, 'v'},
+        {0, 0, 0, 0},
+    };
+
+    while (optind < argc) {
+        char arg = getopt_long(argc, argv, "n:p:m:w:g:u:t:a:i:hv", long_options, &option_index);
+        if (arg != -1) {
+            switch (arg) {
+            case 'n':
+                room_name.assign(optarg);
+                break;
+            case 'p':
+                port = strtoul(optarg, &endarg, 0);
+                break;
+            case 'm':
+                max_members = strtoul(optarg, &endarg, 0);
+                break;
+            case 'w':
+                password.assign(optarg);
+                break;
+            case 'g':
+                preferred_game.assign(optarg);
+                break;
+            case 'i':
+                preferred_game_id = strtoull(optarg, &endarg, 16);
+                break;
+            case 'u':
+                username.assign(optarg);
+                break;
+            case 't':
+                token.assign(optarg);
+                break;
+            case 'a':
+                announce_url.assign(optarg);
+                break;
+            case 'h':
+                PrintHelp(argv[0]);
+                return 0;
+            case 'v':
+                PrintVersion();
+                return 0;
+            }
+        }
+    }
+    std::cout << port << std::endl;
+#ifdef _WIN32
+    LocalFree(argv_w);
+#endif
+
+    if (room_name.empty()) {
+        std::cout << "room name is empty!\n\n";
+        PrintHelp(argv[0]);
+        return -1;
+    }
+    if (preferred_game.empty()) {
+        std::cout << "prefered game is empty!\n\n";
+        PrintHelp(argv[0]);
+        return -1;
+    }
+    if (preferred_game_id == 0) {
+        std::cout << "prefered-game-id not set!\nThis should get set to allow users to find your "
+                     "room.\nSet with --prefered-game-id id\n\n";
+    }
+    if (max_members >= Network::MaxConcurrentConnections || max_members < 2) {
+        std::cout << "max_members needs to be in the range 2 - "
+                  << Network::MaxConcurrentConnections << "!\n\n";
+        PrintHelp(argv[0]);
+        return -1;
+    }
+    if (port > 65535) {
+        std::cout << "port needs to be in the range 0 - 65535!\n\n";
+        PrintHelp(argv[0]);
+        return -1;
+    }
+    bool announce = true;
+    if (username.empty()) {
+        announce = false;
+        std::cout << "username is empty: Hosting a private room\n\n";
+    }
+    if (token.empty() && announce) {
+        announce = false;
+        std::cout << "token is empty: Hosting a private room\n\n";
+    }
+    if (announce_url.empty() && announce) {
+        announce = false;
+        std::cout << "announce url is empty: Hosting a private room\n\n";
+    }
+    if (announce) {
+        std::cout << "Hosting a public room\n\n";
+        Settings::values.announce_multiplayer_room_endpoint_url = announce_url;
+        Settings::values.citra_username = username;
+        Settings::values.citra_token = token;
+    }
+
+    Network::Init();
+    if (std::shared_ptr<Network::Room> room = Network::GetRoom().lock()) {
+        if (!room->Create(room_name, "", port, password, max_members, preferred_game,
+                          preferred_game_id)) {
+            std::cout << "Failed to create room: \n\n";
+            return -1;
+        }
+        std::cout << "Room is open. Close with Q+Enter...\n\n";
+        auto announce_session = std::make_unique<Core::AnnounceMultiplayerSession>();
+        if (announce) {
+            announce_session->Start();
+        }
+        while (room->GetState() == Network::Room::State::Open) {
+            std::string in;
+            std::cin >> in;
+            if (in.size() > 0) {
+                if (announce) {
+                    announce_session->Stop();
+                }
+                announce_session.reset();
+                room->Destroy();
+                Network::Shutdown();
+                return 0;
+            }
+            std::this_thread::sleep_for(std::chrono::milliseconds(100));
+        }
+        if (announce) {
+            announce_session->Stop();
+        }
+        announce_session.reset();
+        room->Destroy();
+    }
+    Network::Shutdown();
+    return 0;
+}

src/dedicated_room/citra-room.rc

@@ -0,0 +1,17 @@
+#include "winresrc.h"
+/////////////////////////////////////////////////////////////////////////////
+//
+// Icon
+//
+
+// Icon with lowest ID value placed first to ensure application icon
+// remains consistent on all systems.
+CITRA_ICON              ICON                    "../../dist/citra.ico"
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// RT_MANIFEST
+//
+
+1                       RT_MANIFEST             "../../dist/citra.manifest"