lokinet/jni/lokinet_daemon.cpp

#include "lokinet_jni_common.hpp"
#include "network_loki_lokinet_LokinetDaemon.h"

#include <llarp.hpp>
#include <llarp/config/config.hpp>
#include <llarp/router/router.hpp>

extern "C"
{
  JNIEXPORT jobject JNICALL
  Java_network_loki_lokinet_LokinetDaemon_Obtain(JNIEnv* env, jclass)
  {
    auto* ptr = new llarp::Context();
    if (ptr == nullptr)
      return nullptr;
    return env->NewDirectByteBuffer(ptr, sizeof(llarp::Context));
  }

  JNIEXPORT void JNICALL
  Java_network_loki_lokinet_LokinetDaemon_Free(JNIEnv* env, jclass, jobject buf)
  {
    auto ptr = FromBuffer<llarp::Context>(env, buf);
    delete ptr;
  }

  JNIEXPORT jboolean JNICALL
  Java_network_loki_lokinet_LokinetDaemon_Configure(JNIEnv* env, jobject self, jobject conf)
  {
    auto ptr = GetImpl<llarp::Context>(env, self);
    auto config = GetImpl<llarp::Config>(env, conf);
    if (ptr == nullptr || config == nullptr)
      return JNI_FALSE;
    try
    {
      llarp::RuntimeOptions opts{};

      // janky make_shared deep copy because jni + shared pointer = scary
      ptr->Configure(std::make_shared<llarp::Config>(*config));
      ptr->Setup(opts);
    }
    catch (...)
    {
      return JNI_FALSE;
    }
    return JNI_TRUE;
  }

  JNIEXPORT jint JNICALL
  Java_network_loki_lokinet_LokinetDaemon_Mainloop(JNIEnv* env, jobject self)
  {
    auto ptr = GetImpl<llarp::Context>(env, self);
    if (ptr == nullptr)
      return -1;
    llarp::RuntimeOptions opts{};
    return ptr->Run(opts);
  }

  JNIEXPORT jboolean JNICALL
  Java_network_loki_lokinet_LokinetDaemon_IsRunning(JNIEnv* env, jobject self)
  {
    auto ptr = GetImpl<llarp::Context>(env, self);
    return (ptr != nullptr && ptr->IsUp()) ? JNI_TRUE : JNI_FALSE;
  }

  JNIEXPORT jboolean JNICALL
  Java_network_loki_lokinet_LokinetDaemon_Stop(JNIEnv* env, jobject self)
  {
    auto ptr = GetImpl<llarp::Context>(env, self);
    if (ptr == nullptr)
      return JNI_FALSE;
    if (not ptr->IsUp())
      return JNI_FALSE;
    ptr->CloseAsync();
    ptr->Wait();
    return ptr->IsUp() ? JNI_FALSE : JNI_TRUE;
  }

  JNIEXPORT void JNICALL
  Java_network_loki_lokinet_LokinetDaemon_InjectVPNFD(JNIEnv* env, jobject self)
  {
    if (auto ptr = GetImpl<llarp::Context>(env, self))
      ptr->androidFD = GetObjectMemberAsInt<int>(env, self, "m_FD");
  }

  JNIEXPORT jint JNICALL
  Java_network_loki_lokinet_LokinetDaemon_GetUDPSocket(JNIEnv* env, jobject self)
  {
    if (auto ptr = GetImpl<llarp::Context>(env, self); ptr and ptr->router)
      return ptr->router->outbound_socket();
    return -1;
  }

  JNIEXPORT jstring JNICALL
  Java_network_loki_lokinet_LokinetDaemon_DetectFreeRange(JNIEnv* env, jclass)
  {
    std::string rangestr{};
    if (auto maybe = llarp::net::Platform::Default_ptr()->FindFreeRange())
    {
      rangestr = maybe->ToString();
    }
    return env->NewStringUTF(rangestr.c_str());
  }

  JNIEXPORT jstring JNICALL
  Java_network_loki_lokinet_LokinetDaemon_DumpStatus(JNIEnv* env, jobject self)
  {
    std::string status{};
    if (auto ptr = GetImpl<llarp::Context>(env, self))
    {
      if (ptr->IsUp())
      {
        std::promise<std::string> result;
        ptr->CallSafe([&result, router = ptr->router]() {
          const auto status = router->ExtractStatus();
          result.set_value(status.dump());
        });
        status = result.get_future().get();
      }
    }
    return env->NewStringUTF(status.c_str());
  }
}