nci/jni/NativeLlcpSocket.cpp

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include "OverrideLog.h"
#include "PeerToPeer.h"
#include "JavaClassConstants.h"


namespace android
{


/*******************************************************************************
**
** Function:        nativeLlcpSocket_doConnect
**
** Description:     Establish a connection to the peer.
**                  e: JVM environment.
**                  o: Java object.
**                  nSap: Service access point.
**
** Returns:         True if ok.
**
*******************************************************************************/
static jboolean nativeLlcpSocket_doConnect (JNIEnv* e, jobject o, jint nSap)
{
    bool            stat = false;
    jboolean        retVal = JNI_FALSE;

    ALOGD ("%s: enter; sap=%d", __FUNCTION__, nSap);

    PeerToPeer::tJNI_HANDLE jniHandle = (PeerToPeer::tJNI_HANDLE) nfc_jni_get_nfc_socket_handle (e,o);

    stat = PeerToPeer::getInstance().connectConnOriented (jniHandle, nSap);

    if (stat)
        retVal = JNI_TRUE;

    ALOGD ("%s: exit", __FUNCTION__);
    return retVal;
}


/*******************************************************************************
**
** Function:        nativeLlcpSocket_doConnectBy
**
** Description:     Establish a connection to the peer.
**                  e: JVM environment.
**                  o: Java object.
**                  sn: Service name.
**
** Returns:         True if ok.
**
*******************************************************************************/
static jboolean nativeLlcpSocket_doConnectBy (JNIEnv* e, jobject o, jstring sn)
{
    ALOGD ("%s: enter", __FUNCTION__);
    bool stat = false;
    jboolean retVal = JNI_FALSE;

    PeerToPeer::tJNI_HANDLE jniHandle = (PeerToPeer::tJNI_HANDLE) nfc_jni_get_nfc_socket_handle (e,o);

    const char* serviceName = e->GetStringUTFChars (sn, JNI_FALSE); //convert jstring, which is unicode, into char*

    stat = PeerToPeer::getInstance().connectConnOriented (jniHandle, serviceName);

    e->ReleaseStringUTFChars (sn, serviceName); //free the string

    if (stat)
        retVal = JNI_TRUE;

    ALOGD ("%s: exit", __FUNCTION__);
    return retVal;
}


/*******************************************************************************
**
** Function:        nativeLlcpSocket_doClose
**
** Description:     Close socket.
**                  e: JVM environment.
**                  o: Java object.
**
** Returns:         True if ok.
**
*******************************************************************************/
static jboolean nativeLlcpSocket_doClose(JNIEnv *e, jobject o)
{
    ALOGD ("%s: enter", __FUNCTION__);
    bool stat = false;
    jboolean retVal = JNI_FALSE;

    PeerToPeer::tJNI_HANDLE jniHandle = (PeerToPeer::tJNI_HANDLE) nfc_jni_get_nfc_socket_handle (e,o);

    stat = PeerToPeer::getInstance().disconnectConnOriented (jniHandle);

    retVal = JNI_TRUE;
    ALOGD ("%s: exit", __FUNCTION__);
    return retVal;
}


/*******************************************************************************
**
** Function:        nativeLlcpSocket_doSend
**
** Description:     Send data to peer.
**                  e: JVM environment.
**                  o: Java object.
**                  data: Buffer of data.
**
** Returns:         True if sent ok.
**
*******************************************************************************/
static jboolean nativeLlcpSocket_doSend (JNIEnv* e, jobject o, jbyteArray data)
{
    ALOGD_IF ((appl_trace_level>=BT_TRACE_LEVEL_DEBUG), "%s: enter", __FUNCTION__);
    uint8_t* dataBuffer = (uint8_t*) e->GetByteArrayElements (data, NULL);
    uint32_t dataBufferLen = (uint32_t) e->GetArrayLength (data);
    bool stat = false;

    PeerToPeer::tJNI_HANDLE jniHandle = (PeerToPeer::tJNI_HANDLE) nfc_jni_get_nfc_socket_handle (e,o);

    stat = PeerToPeer::getInstance().send (jniHandle, dataBuffer, dataBufferLen);

    e->ReleaseByteArrayElements (data, (jbyte*) dataBuffer, JNI_ABORT);

    ALOGD_IF ((appl_trace_level>=BT_TRACE_LEVEL_DEBUG), "%s: exit", __FUNCTION__);
    return stat ? JNI_TRUE : JNI_FALSE;
}


/*******************************************************************************
**
** Function:        nativeLlcpSocket_doReceive
**
** Description:     Receive data from peer.
**                  e: JVM environment.
**                  o: Java object.
**                  origBuffer: Buffer to put received data.
**
** Returns:         Number of bytes received.
**
*******************************************************************************/
static jint nativeLlcpSocket_doReceive(JNIEnv *e, jobject o, jbyteArray origBuffer)
{
    ALOGD_IF ((appl_trace_level>=BT_TRACE_LEVEL_DEBUG), "%s: enter", __FUNCTION__);
    uint8_t* dataBuffer = (uint8_t*) e->GetByteArrayElements (origBuffer, NULL);
    uint32_t dataBufferLen = (uint32_t) e->GetArrayLength (origBuffer);
    uint16_t actualLen = 0;
    bool stat = false;
    jint retval = 0;

    PeerToPeer::tJNI_HANDLE jniHandle = (PeerToPeer::tJNI_HANDLE) nfc_jni_get_nfc_socket_handle (e,o);

    stat = PeerToPeer::getInstance().receive (jniHandle, dataBuffer, dataBufferLen, actualLen);

    if (stat && (actualLen>0))
    {
        retval = actualLen;
    }
    else
        retval = -1;

    e->ReleaseByteArrayElements (origBuffer, (jbyte*) dataBuffer, 0);
    ALOGD_IF ((appl_trace_level>=BT_TRACE_LEVEL_DEBUG), "%s: exit; actual len=%d", __FUNCTION__, retval);
    return retval;
}


/*******************************************************************************
**
** Function:        nativeLlcpSocket_doGetRemoteSocketMIU
**
** Description:     Get peer's maximum information unit.
**                  e: JVM environment.
**                  o: Java object.
**
** Returns:         Peer's maximum information unit.
**
*******************************************************************************/
static jint nativeLlcpSocket_doGetRemoteSocketMIU (JNIEnv* e, jobject o)
{
    ALOGD ("%s: enter", __FUNCTION__);
    bool stat = false;

    PeerToPeer::tJNI_HANDLE jniHandle = (PeerToPeer::tJNI_HANDLE) nfc_jni_get_nfc_socket_handle (e,o);
    jint miu = 0;

    miu = PeerToPeer::getInstance().getRemoteMaxInfoUnit (jniHandle);

    ALOGD ("%s: exit", __FUNCTION__);
    return miu;
}


/*******************************************************************************
**
** Function:        nativeLlcpSocket_doGetRemoteSocketRW
**
** Description:     Get peer's receive window size.
**                  e: JVM environment.
**                  o: Java object.
**
** Returns:         Peer's receive window size.
**
*******************************************************************************/
static jint nativeLlcpSocket_doGetRemoteSocketRW (JNIEnv* e, jobject o)
{
    ALOGD ("%s: enter", __FUNCTION__);
    bool stat = false;
    jint rw = 0;

    PeerToPeer::tJNI_HANDLE jniHandle = (PeerToPeer::tJNI_HANDLE) nfc_jni_get_nfc_socket_handle (e,o);

    rw = PeerToPeer::getInstance().getRemoteRecvWindow (jniHandle);

    ALOGD ("%s: exit", __FUNCTION__);
    return rw;
}


/*****************************************************************************
**
** Description:     JNI functions
**
*****************************************************************************/
static JNINativeMethod gMethods[] =
{
    {"doConnect", "(I)Z", (void * ) nativeLlcpSocket_doConnect},
    {"doConnectBy", "(Ljava/lang/String;)Z", (void*) nativeLlcpSocket_doConnectBy},
    {"doClose", "()Z", (void *) nativeLlcpSocket_doClose},
    {"doSend", "([B)Z", (void *) nativeLlcpSocket_doSend},
    {"doReceive", "([B)I", (void *) nativeLlcpSocket_doReceive},
    {"doGetRemoteSocketMiu", "()I", (void *) nativeLlcpSocket_doGetRemoteSocketMIU},
    {"doGetRemoteSocketRw", "()I", (void *) nativeLlcpSocket_doGetRemoteSocketRW},
};


/*******************************************************************************
**
** Function:        register_com_android_nfc_NativeLlcpSocket
**
** Description:     Regisgter JNI functions with Java Virtual Machine.
**                  e: Environment of JVM.
**
** Returns:         Status of registration.
**
*******************************************************************************/
int register_com_android_nfc_NativeLlcpSocket (JNIEnv* e)
{
    return jniRegisterNativeMethods (e, gNativeLlcpSocketClassName, gMethods, NELEM(gMethods));
}


} //namespace android