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// Copyright 2026 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include <memory>
#include <string>
#include <vector>
#include <jni.h>
#include "Common/CommonTypes.h"
#include "Common/TraversalClient.h"
#include "Core/Boot/Boot.h"
#include "Core/Config/NetplaySettings.h"
#include "Core/NetPlayClient.h"
#include "Core/NetPlayCommon.h"
#include "Core/NetPlayServer.h"
#include "UICommon/GameFile.h"
#include "jni/AndroidCommon/AndroidCommon.h"
#include "jni/AndroidCommon/IDCache.h"
#include "jni/NetPlay/NetPlayUICallbacks.h"
static NetPlay::NetPlayUICallbacks* GetUICallbacksPointer(JNIEnv* env, jobject obj)
{
return reinterpret_cast<NetPlay::NetPlayUICallbacks*>(
env->GetLongField(obj, IDCache::GetNetPlayUICallbacksPointer()));
}
static NetPlay::NetPlayClient* GetClientPointer(JNIEnv* env, jobject obj)
{
return reinterpret_cast<NetPlay::NetPlayClient*>(
env->GetLongField(obj, IDCache::GetNetPlayClientPointer()));
}
static NetPlay::NetPlayServer* GetServerPointer(JNIEnv* env, jobject obj)
{
return reinterpret_cast<NetPlay::NetPlayServer*>(
env->GetLongField(obj, IDCache::GetNetPlayServerPointer()));
}
extern "C" {
JNIEXPORT void JNICALL
Java_org_dolphinemu_dolphinemu_features_netplay_NetplaySession_nativeSendMessage(JNIEnv* env,
jobject obj,
jstring jmessage)
{
if (auto* client = GetClientPointer(env, obj))
client->SendChatMessage(GetJString(env, jmessage));
}
JNIEXPORT void JNICALL
Java_org_dolphinemu_dolphinemu_features_netplay_NetplaySession_nativeSetHostInputAuthority(
JNIEnv* env, jobject obj, jboolean enable)
{
if (auto* server = GetServerPointer(env, obj))
server->SetHostInputAuthority(static_cast<bool>(enable));
}
JNIEXPORT void JNICALL
Java_org_dolphinemu_dolphinemu_features_netplay_NetplaySession_nativeAdjustClientPadBufferSize(
JNIEnv* env, jobject obj, jint buffer)
{
if (auto* client = GetClientPointer(env, obj))
client->AdjustPadBufferSize(static_cast<u32>(buffer));
}
JNIEXPORT void JNICALL
Java_org_dolphinemu_dolphinemu_features_netplay_NetplaySession_nativeAdjustServerPadBufferSize(
JNIEnv* env, jobject obj, jint buffer)
{
if (auto* server = GetServerPointer(env, obj))
server->AdjustPadBufferSize(static_cast<u32>(buffer));
}
JNIEXPORT jlong JNICALL
Java_org_dolphinemu_dolphinemu_features_netplay_NetplaySession_nativeCreateUICallbacks(
JNIEnv* env, jobject obj, jobjectArray jgame_files)
{
std::vector<std::shared_ptr<const UICommon::GameFile>> games;
const jsize count = env->GetArrayLength(jgame_files);
games.reserve(count);
for (jsize i = 0; i < count; i++)
{
jobject jgame_file = env->GetObjectArrayElement(jgame_files, i);
auto* game_ptr = reinterpret_cast<std::shared_ptr<const UICommon::GameFile>*>(
env->GetLongField(jgame_file, IDCache::GetGameFilePointer()));
if (game_ptr)
games.push_back(*game_ptr);
env->DeleteLocalRef(jgame_file);
}
return reinterpret_cast<jlong>(new NetPlay::NetPlayUICallbacks(obj, std::move(games)));
}
JNIEXPORT jlong JNICALL
Java_org_dolphinemu_dolphinemu_features_netplay_NetplaySession_nativeJoin(JNIEnv* env, jobject obj)
{
auto* ui = GetUICallbacksPointer(env, obj);
const std::string traversal_host = Config::Get(Config::NETPLAY_TRAVERSAL_SERVER);
const u16 traversal_port = Config::Get(Config::NETPLAY_TRAVERSAL_PORT);
const std::string nickname = Config::Get(Config::NETPLAY_NICKNAME);
std::string host_ip;
u16 host_port;
bool is_traversal;
// When hosting, join our own server on localhost
if (auto* server = GetServerPointer(env, obj))
{
host_ip = "127.0.0.1";
host_port = server->GetPort();
is_traversal = false;
}
else
{
const std::string traversal_choice = Config::Get(Config::NETPLAY_TRAVERSAL_CHOICE);
is_traversal = traversal_choice == "traversal";
host_ip = is_traversal ? Config::Get(Config::NETPLAY_HOST_CODE) :
Config::Get(Config::NETPLAY_ADDRESS);
host_port = Config::Get(Config::NETPLAY_CONNECT_PORT);
}
auto client = std::make_unique<NetPlay::NetPlayClient>(
host_ip, host_port, ui, nickname,
NetPlay::NetTraversalConfig{is_traversal, traversal_host, traversal_port});
if (!client->IsConnected())
return 0;
return reinterpret_cast<jlong>(client.release());
}
JNIEXPORT jlong JNICALL
Java_org_dolphinemu_dolphinemu_features_netplay_NetplaySession_nativeHost(JNIEnv* env, jobject obj)
{
auto* ui = GetUICallbacksPointer(env, obj);
const std::string traversal_choice = Config::Get(Config::NETPLAY_TRAVERSAL_CHOICE);
const bool is_traversal = traversal_choice == "traversal";
const bool use_upnp = Config::Get(Config::NETPLAY_USE_UPNP);
const std::string traversal_host = Config::Get(Config::NETPLAY_TRAVERSAL_SERVER);
const u16 traversal_port = Config::Get(Config::NETPLAY_TRAVERSAL_PORT);
const u16 traversal_port_alt = Config::Get(Config::NETPLAY_TRAVERSAL_PORT_ALT);
const u16 host_port = is_traversal ? Config::Get(Config::NETPLAY_LISTEN_PORT) :
Config::Get(Config::NETPLAY_HOST_PORT);
auto server = std::make_unique<NetPlay::NetPlayServer>(
host_port, use_upnp, ui,
NetPlay::NetTraversalConfig{is_traversal, traversal_host, traversal_port,
traversal_port_alt});
if (!server->is_connected)
return 0;
const std::string network_mode = Config::Get(Config::NETPLAY_NETWORK_MODE);
const bool host_input_authority = network_mode == "hostinputauthority" || network_mode == "golf";
server->SetHostInputAuthority(host_input_authority);
server->AdjustPadBufferSize(Config::Get(Config::NETPLAY_BUFFER_SIZE));
return reinterpret_cast<jlong>(server.release());
}
JNIEXPORT void JNICALL
Java_org_dolphinemu_dolphinemu_features_netplay_NetplaySession_nativeChangeGame(JNIEnv* env,
jobject obj,
jobject jgame_file)
{
auto* server = GetServerPointer(env, obj);
if (!server)
return;
const auto& game_file = *reinterpret_cast<std::shared_ptr<const UICommon::GameFile>*>(
env->GetLongField(jgame_file, IDCache::GetGameFilePointer()));
server->ChangeGame(game_file->GetSyncIdentifier(), game_file->GetLongName());
}
JNIEXPORT jboolean JNICALL
Java_org_dolphinemu_dolphinemu_features_netplay_NetplaySession_nativeDoAllPlayersHaveGame(
JNIEnv* env, jobject obj)
{
if (auto* client = GetClientPointer(env, obj))
return static_cast<jboolean>(client->DoAllPlayersHaveGame());
return JNI_TRUE;
}
JNIEXPORT void JNICALL
Java_org_dolphinemu_dolphinemu_features_netplay_NetplaySession_nativeStartGame(JNIEnv* env,
jobject obj)
{
auto* server = GetServerPointer(env, obj);
if (!server)
return;
server->RequestStartGame();
}
JNIEXPORT jint JNICALL Java_org_dolphinemu_dolphinemu_features_netplay_NetplaySession_nativeGetPort(
JNIEnv* env, jobject obj)
{
if (auto* server = GetServerPointer(env, obj))
return static_cast<jint>(server->GetPort());
return 0;
}
JNIEXPORT jstring JNICALL
Java_org_dolphinemu_dolphinemu_features_netplay_NetplaySession_nativeGetExternalIpAddress(
JNIEnv* env, jobject)
{
std::string ip = NetPlay::GetExternalIPAddress();
if (ip.empty())
return nullptr;
return ToJString(env, ip);
}
JNIEXPORT void JNICALL
Java_org_dolphinemu_dolphinemu_features_netplay_NetplaySession_nativeReconnectTraversal(JNIEnv*,
jobject)
{
if (Common::g_TraversalClient)
Common::g_TraversalClient->ReconnectToServer();
}
JNIEXPORT void JNICALL
Java_org_dolphinemu_dolphinemu_features_netplay_NetplaySession_nativeReleaseUICallbacks(
JNIEnv*, jobject, jlong pointer)
{
delete reinterpret_cast<NetPlay::NetPlayUICallbacks*>(pointer);
}
JNIEXPORT void JNICALL
Java_org_dolphinemu_dolphinemu_features_netplay_NetplaySession_nativeReleaseBootSessionData(
JNIEnv*, jobject, jlong pointer)
{
delete reinterpret_cast<BootSessionData*>(pointer);
}
JNIEXPORT void JNICALL
Java_org_dolphinemu_dolphinemu_features_netplay_NetplaySession_nativeReleaseClient(JNIEnv*, jobject,
jlong pointer)
{
delete reinterpret_cast<NetPlay::NetPlayClient*>(pointer);
}
JNIEXPORT void JNICALL
Java_org_dolphinemu_dolphinemu_features_netplay_NetplaySession_nativeReleaseServer(JNIEnv*, jobject,
jlong pointer)
{
delete reinterpret_cast<NetPlay::NetPlayServer*>(pointer);
}
} // extern "C"
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