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/*
* Copyright (C) 2012-2015 Tobias Brunner
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. *
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include "network_manager.h"
#include "../android_jni.h"
#include "../charonservice.h"
#include <utils/debug.h>
#include <threading/mutex.h>
typedef struct private_network_manager_t private_network_manager_t;
struct private_network_manager_t {
/**
* Public interface
*/
network_manager_t public;
/**
* Reference to NetworkManager object
*/
jobject obj;
/**
* Java class for NetworkManager
*/
jclass cls;
/**
* Registered callback
*/
struct {
connectivity_cb_t cb;
void *data;
} connectivity_cb;
/**
* Mutex to access callback
*/
mutex_t *mutex;
};
JNI_METHOD(NetworkManager, networkChanged, void,
bool disconnected)
{
private_network_manager_t *nm;
nm = (private_network_manager_t*)charonservice->get_network_manager(
charonservice);
nm->mutex->lock(nm->mutex);
if (nm->connectivity_cb.cb)
{
nm->connectivity_cb.cb(nm->connectivity_cb.data, disconnected);
}
nm->mutex->unlock(nm->mutex);
}
METHOD(network_manager_t, add_connectivity_cb, void,
private_network_manager_t *this, connectivity_cb_t cb, void *data)
{
this->mutex->lock(this->mutex);
if (!this->connectivity_cb.cb)
{
JNIEnv *env;
jmethodID method_id;
androidjni_attach_thread(&env);
method_id = (*env)->GetMethodID(env, this->cls, "Register", "()V");
if (!method_id)
{
androidjni_exception_occurred(env);
}
else
{
(*env)->CallVoidMethod(env, this->obj, method_id);
if (!androidjni_exception_occurred(env))
{
this->connectivity_cb.cb = cb;
this->connectivity_cb.data = data;
}
}
androidjni_detach_thread();
}
this->mutex->unlock(this->mutex);
}
/**
* Unregister the NetworkManager via JNI.
*
* this->mutex has to be locked
*/
static void unregister_network_manager(private_network_manager_t *this)
{
JNIEnv *env;
jmethodID method_id;
androidjni_attach_thread(&env);
method_id = (*env)->GetMethodID(env, this->cls, "Unregister", "()V");
if (!method_id)
{
androidjni_exception_occurred(env);
}
else
{
(*env)->CallVoidMethod(env, this->obj, method_id);
androidjni_exception_occurred(env);
}
androidjni_detach_thread();
}
METHOD(network_manager_t, remove_connectivity_cb, void,
private_network_manager_t *this, connectivity_cb_t cb)
{
bool unregister = FALSE;
this->mutex->lock(this->mutex);
if (this->connectivity_cb.cb == cb)
{
this->connectivity_cb.cb = NULL;
unregister = TRUE;
}
this->mutex->unlock(this->mutex);
if (unregister)
{ /* this call blocks until a possible networkChanged call returned so
* we can't hold the mutex */
unregister_network_manager(this);
}
}
METHOD(network_manager_t, is_connected, bool,
private_network_manager_t *this)
{
JNIEnv *env;
jmethodID method_id;
bool connected = FALSE;
androidjni_attach_thread(&env);
method_id = (*env)->GetMethodID(env, this->cls, "isConnected", "()Z");
if (!method_id)
{
androidjni_exception_occurred(env);
}
else
{
connected = (*env)->CallBooleanMethod(env, this->obj, method_id);
connected = !androidjni_exception_occurred(env) && connected;
}
androidjni_detach_thread();
return connected;
}
METHOD(network_manager_t, destroy, void,
private_network_manager_t *this)
{
JNIEnv *env;
this->mutex->lock(this->mutex);
if (this->connectivity_cb.cb)
{
this->connectivity_cb.cb = NULL;
unregister_network_manager(this);
}
this->mutex->unlock(this->mutex);
androidjni_attach_thread(&env);
if (this->obj)
{
(*env)->DeleteGlobalRef(env, this->obj);
}
if (this->cls)
{
(*env)->DeleteGlobalRef(env, this->cls);
}
androidjni_detach_thread();
this->mutex->destroy(this->mutex);
free(this);
}
/*
* Described in header.
*/
network_manager_t *network_manager_create(jobject context)
{
private_network_manager_t *this;
JNIEnv *env;
jmethodID method_id;
jobject obj;
jclass cls;
INIT(this,
.public = {
.add_connectivity_cb = _add_connectivity_cb,
.remove_connectivity_cb = _remove_connectivity_cb,
.is_connected = _is_connected,
.destroy = _destroy,
},
.mutex = mutex_create(MUTEX_TYPE_DEFAULT),
);
androidjni_attach_thread(&env);
cls = (*env)->FindClass(env, JNI_PACKAGE_STRING "/NetworkManager");
if (!cls)
{
goto failed;
}
this->cls = (*env)->NewGlobalRef(env, cls);
method_id = (*env)->GetMethodID(env, cls, "<init>",
"(Landroid/content/Context;)V");
if (!method_id)
{
goto failed;
}
obj = (*env)->NewObject(env, cls, method_id, context);
if (!obj)
{
goto failed;
}
this->obj = (*env)->NewGlobalRef(env, obj);
androidjni_detach_thread();
return &this->public;
failed:
DBG1(DBG_KNL, "failed to build NetworkManager object");
androidjni_exception_occurred(env);
androidjni_detach_thread();
destroy(this);
return NULL;
};
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