/*
* 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 <android-base/stringprintf.h>
#include <base/logging.h>
#include <errno.h>
#include <malloc.h>
#include <nativehelper/ScopedLocalRef.h>
#include <nativehelper/ScopedPrimitiveArray.h>
#include <semaphore.h>
#include <string.h>
#include "JavaClassConstants.h"
#include "NfcJniUtil.h"
#include "nfa_api.h"
#include "nfa_p2p_api.h"
using android::base::StringPrintf;
extern bool nfc_debug_enabled;
namespace android {
/*****************************************************************************
**
** private variables and functions
**
*****************************************************************************/
static sem_t sConnlessRecvSem;
static jboolean sConnlessRecvWaitingForData = JNI_FALSE;
static uint8_t* sConnlessRecvBuf = NULL;
static uint32_t sConnlessRecvLen = 0;
static uint32_t sConnlessRecvRemoteSap = 0;
/*******************************************************************************
**
** Function: nativeLlcpConnectionlessSocket_doSendTo
**
** Description: Send data to peer.
** e: JVM environment.
** o: Java object.
** nsap: service access point.
** data: buffer for data.
**
** Returns: True if ok.
**
*******************************************************************************/
static jboolean nativeLlcpConnectionlessSocket_doSendTo(JNIEnv* e, jobject o,
jint nsap,
jbyteArray data) {
DLOG_IF(INFO, nfc_debug_enabled)
<< StringPrintf("%s: nsap = %d", __func__, nsap);
ScopedLocalRef<jclass> c(e, e->GetObjectClass(o));
jfieldID f = e->GetFieldID(c.get(), "mHandle", "I");
jint handle = e->GetIntField(o, f);
ScopedByteArrayRO bytes(e, data);
if (bytes.get() == NULL) {
return JNI_FALSE;
}
size_t byte_count = bytes.size();
DLOG_IF(INFO, nfc_debug_enabled)
<< StringPrintf("NFA_P2pSendUI: len = %zu", byte_count);
uint8_t* raw_ptr = const_cast<uint8_t*>(reinterpret_cast<const uint8_t*>(
&bytes[0])); // TODO: API bug; NFA_P2pSendUI should take const*!
tNFA_STATUS status =
NFA_P2pSendUI((tNFA_HANDLE)handle, nsap, byte_count, raw_ptr);
DLOG_IF(INFO, nfc_debug_enabled)
<< StringPrintf("%s: NFA_P2pSendUI done, status = %d", __func__, status);
if (status != NFA_STATUS_OK) {
LOG(ERROR) << StringPrintf("%s: NFA_P2pSendUI failed, status = %d",
__func__, status);
return JNI_FALSE;
}
return JNI_TRUE;
}
/*******************************************************************************
**
** Function: nativeLlcpConnectionlessSocket_receiveData
**
** Description: Receive data from the stack.
** data: buffer contains data.
** len: length of data.
** remoteSap: remote service access point.
**
** Returns: None
**
*******************************************************************************/
void nativeLlcpConnectionlessSocket_receiveData(uint8_t* data, uint32_t len,
uint32_t remoteSap) {
DLOG_IF(INFO, nfc_debug_enabled)
<< StringPrintf("%s: waiting for data = %d, len = %d", __func__,
sConnlessRecvWaitingForData, len);
// Sanity...
if (sConnlessRecvLen < len) {
len = sConnlessRecvLen;
}
if (sConnlessRecvWaitingForData) {
sConnlessRecvWaitingForData = JNI_FALSE;
sConnlessRecvLen = len;
memcpy(sConnlessRecvBuf, data, len);
sConnlessRecvRemoteSap = remoteSap;
sem_post(&sConnlessRecvSem);
}
}
/*******************************************************************************
**
** Function: connectionlessCleanup
**
** Description: Free resources.
**
** Returns: None
**
*******************************************************************************/
static jobject connectionlessCleanup() {
sConnlessRecvWaitingForData = JNI_FALSE;
sConnlessRecvLen = 0;
if (sConnlessRecvBuf != NULL) {
free(sConnlessRecvBuf);
sConnlessRecvBuf = NULL;
}
return NULL;
}
/*******************************************************************************
**
** Function: nativeLlcpConnectionlessSocket_abortWait
**
** Description: Abort current operation and unblock threads.
**
** Returns: None
**
*******************************************************************************/
void nativeLlcpConnectionlessSocket_abortWait() { sem_post(&sConnlessRecvSem); }
/*******************************************************************************
**
** Function: nativeLlcpConnectionlessSocket_doReceiveFrom
**
** Description: Receive data from a peer.
** e: JVM environment.
** o: Java object.
** linkMiu: max info unit
**
** Returns: LlcpPacket Java object.
**
*******************************************************************************/
static jobject nativeLlcpConnectionlessSocket_doReceiveFrom(JNIEnv* e, jobject,
jint linkMiu) {
DLOG_IF(INFO, nfc_debug_enabled)
<< StringPrintf("%s: linkMiu = %d", __func__, linkMiu);
jobject llcpPacket = NULL;
ScopedLocalRef<jclass> clsLlcpPacket(e, NULL);
if (sConnlessRecvWaitingForData != JNI_FALSE) {
DLOG_IF(INFO, nfc_debug_enabled)
<< StringPrintf("%s: Already waiting for incoming data", __func__);
return NULL;
}
sConnlessRecvBuf = (uint8_t*)malloc(linkMiu);
if (sConnlessRecvBuf == NULL) {
DLOG_IF(INFO, nfc_debug_enabled) << StringPrintf(
"%s: Failed to allocate %d bytes memory buffer", __func__, linkMiu);
return NULL;
}
sConnlessRecvLen = linkMiu;
// Create the write semaphore
if (sem_init(&sConnlessRecvSem, 0, 0) == -1) {
LOG(ERROR) << StringPrintf("%s: semaphore creation failed (errno=0x%08x)",
__func__, errno);
return connectionlessCleanup();
}
sConnlessRecvWaitingForData = JNI_TRUE;
// Wait for sConnlessRecvSem completion status
if (sem_wait(&sConnlessRecvSem)) {
LOG(ERROR) << StringPrintf(
"%s: Failed to wait for write semaphore (errno=0x%08x)", __func__,
errno);
goto TheEnd;
}
// Create new LlcpPacket object
if (nfc_jni_cache_object_local(e, "com/android/nfc/LlcpPacket",
&(llcpPacket)) == -1) {
LOG(ERROR) << StringPrintf("%s: Find LlcpPacket class error", __func__);
return connectionlessCleanup();
}
// Get NativeConnectionless class object
clsLlcpPacket.reset(e->GetObjectClass(llcpPacket));
if (e->ExceptionCheck()) {
e->ExceptionClear();
LOG(ERROR) << StringPrintf("%s: Get Object class error", __func__);
return connectionlessCleanup();
}
// Set Llcp Packet remote SAP
jfieldID f;
f = e->GetFieldID(clsLlcpPacket.get(), "mRemoteSap", "I");
e->SetIntField(llcpPacket, f, (jbyte)sConnlessRecvRemoteSap);
// Set Llcp Packet Buffer
DLOG_IF(INFO, nfc_debug_enabled)
<< StringPrintf("%s: Received Llcp packet buffer size = %d\n", __func__,
sConnlessRecvLen);
f = e->GetFieldID(clsLlcpPacket.get(), "mDataBuffer", "[B");
{
ScopedLocalRef<jbyteArray> receivedData(e,
e->NewByteArray(sConnlessRecvLen));
e->SetByteArrayRegion(receivedData.get(), 0, sConnlessRecvLen,
(jbyte*)sConnlessRecvBuf);
e->SetObjectField(llcpPacket, f, receivedData.get());
}
TheEnd: // TODO: should all the "return connectionlessCleanup()"s in this
// function jump here instead?
connectionlessCleanup();
if (sem_destroy(&sConnlessRecvSem)) {
LOG(ERROR) << StringPrintf(
"%s: Failed to destroy sConnlessRecvSem semaphore (errno=0x%08x)",
__func__, errno);
}
return llcpPacket;
}
/*******************************************************************************
**
** Function: nativeLlcpConnectionlessSocket_doClose
**
** Description: Close socket.
** e: JVM environment.
** o: Java object.
**
** Returns: True if ok.
**
*******************************************************************************/
static jboolean nativeLlcpConnectionlessSocket_doClose(JNIEnv* e, jobject o) {
DLOG_IF(INFO, nfc_debug_enabled) << StringPrintf("%s", __func__);
ScopedLocalRef<jclass> c(e, e->GetObjectClass(o));
jfieldID f = e->GetFieldID(c.get(), "mHandle", "I");
jint handle = e->GetIntField(o, f);
tNFA_STATUS status = NFA_P2pDisconnect((tNFA_HANDLE)handle, FALSE);
if (status != NFA_STATUS_OK) {
LOG(ERROR) << StringPrintf("%s: disconnect failed, status = %d", __func__,
status);
return JNI_FALSE;
}
return JNI_TRUE;
}
/*****************************************************************************
**
** Description: JNI functions
**
*****************************************************************************/
static JNINativeMethod gMethods[] = {
{"doSendTo", "(I[B)Z", (void*)nativeLlcpConnectionlessSocket_doSendTo},
{"doReceiveFrom", "(I)Lcom/android/nfc/LlcpPacket;",
(void*)nativeLlcpConnectionlessSocket_doReceiveFrom},
{"doClose", "()Z", (void*)nativeLlcpConnectionlessSocket_doClose},
};
/*******************************************************************************
**
** Function: register_com_android_nfc_NativeLlcpConnectionlessSocket
**
** Description: Regisgter JNI functions with Java Virtual Machine.
** e: Environment of JVM.
**
** Returns: Status of registration.
**
*******************************************************************************/
int register_com_android_nfc_NativeLlcpConnectionlessSocket(JNIEnv* e) {
return jniRegisterNativeMethods(e, gNativeLlcpConnectionlessSocketClassName,
gMethods, NELEM(gMethods));
}
} // namespace android