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author | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 18:28:45 -0800 |
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committer | The Android Open Source Project <initial-contribution@android.com> | 2009-03-03 18:28:45 -0800 |
commit | d83a98f4ce9cfa908f5c54bbd70f03eec07e7553 (patch) | |
tree | 4b825dc642cb6eb9a060e54bf8d69288fbee4904 /core/jni/android_bluetooth_ScoSocket.cpp | |
parent | 076357b8567458d4b6dfdcf839ef751634cd2bfb (diff) | |
download | frameworks_base-d83a98f4ce9cfa908f5c54bbd70f03eec07e7553.zip frameworks_base-d83a98f4ce9cfa908f5c54bbd70f03eec07e7553.tar.gz frameworks_base-d83a98f4ce9cfa908f5c54bbd70f03eec07e7553.tar.bz2 |
auto import from //depot/cupcake/@135843
Diffstat (limited to 'core/jni/android_bluetooth_ScoSocket.cpp')
-rw-r--r-- | core/jni/android_bluetooth_ScoSocket.cpp | 506 |
1 files changed, 0 insertions, 506 deletions
diff --git a/core/jni/android_bluetooth_ScoSocket.cpp b/core/jni/android_bluetooth_ScoSocket.cpp deleted file mode 100644 index 3afe5f5..0000000 --- a/core/jni/android_bluetooth_ScoSocket.cpp +++ /dev/null @@ -1,506 +0,0 @@ -/* -** Copyright 2008, 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. -*/ - -#define LOG_TAG "bluetooth_ScoSocket.cpp" - -#include "android_bluetooth_common.h" -#include "android_runtime/AndroidRuntime.h" -#include "JNIHelp.h" -#include "jni.h" -#include "utils/Log.h" -#include "utils/misc.h" - -#include <stdio.h> -#include <string.h> -#include <stdlib.h> -#include <errno.h> -#include <unistd.h> -#include <pthread.h> -#include <sys/socket.h> -#include <sys/types.h> -#include <sys/uio.h> -#include <sys/poll.h> - -#ifdef HAVE_BLUETOOTH -#include <bluetooth/bluetooth.h> -#include <bluetooth/sco.h> -#endif - -/* Ideally, blocking I/O on a SCO socket would return when another thread - * calls close(). However it does not right now, in fact close() on a SCO - * socket has strange behavior (returns a bogus value) when other threads - * are performing blocking I/O on that socket. So, to workaround, we always - * call close() from the same thread that does blocking I/O. This requires the - * use of a socketpair to signal the blocking I/O to abort. - * - * Unfortunately I don't know a way to abort connect() yet, but at least this - * times out after the BT page timeout (10 seconds currently), so the thread - * will die eventually. The fact that the thread can outlive - * the Java object forces us to use a mutex in destoryNative(). - * - * The JNI API is entirely async. - * - * Also note this class deals only with SCO connections, not with data - * transmission. - */ -namespace android { -#ifdef HAVE_BLUETOOTH - -static JavaVM *jvm; -static jfieldID field_mNativeData; -static jmethodID method_onAccepted; -static jmethodID method_onConnected; -static jmethodID method_onClosed; - -struct thread_data_t; -static void *work_thread(void *arg); -static int connect_work(const char *address); -static int accept_work(int signal_sk); -static void wait_for_close(int sk, int signal_sk); -static void closeNative(JNIEnv *env, jobject object); - -/* shared native data - protected by mutex */ -typedef struct { - pthread_mutex_t mutex; - int signal_sk; // socket to signal blocked I/O to unblock - jobject object; // JNI global ref to the Java object - thread_data_t *thread_data; // pointer to thread local data - // max 1 thread per sco socket -} native_data_t; - -/* thread local data */ -struct thread_data_t { - native_data_t *nat; - bool is_accept; // accept (listening) or connect (outgoing) thread - int signal_sk; // socket for thread to listen for unblock signal - char address[BTADDR_SIZE]; // BT addres as string -}; - -static inline native_data_t * get_native_data(JNIEnv *env, jobject object) { - return (native_data_t *)(env->GetIntField(object, field_mNativeData)); -} -#endif - -static void classInitNative(JNIEnv* env, jclass clazz) { - LOGV(__FUNCTION__); -#ifdef HAVE_BLUETOOTH - if (env->GetJavaVM(&jvm) < 0) { - LOGE("Could not get handle to the VM"); - } - field_mNativeData = get_field(env, clazz, "mNativeData", "I"); - method_onAccepted = env->GetMethodID(clazz, "onAccepted", "(I)V"); - method_onConnected = env->GetMethodID(clazz, "onConnected", "(I)V"); - method_onClosed = env->GetMethodID(clazz, "onClosed", "()V"); -#endif -} - -/* Returns false if a serious error occured */ -static jboolean initNative(JNIEnv* env, jobject object) { - LOGV(__FUNCTION__); -#ifdef HAVE_BLUETOOTH - - native_data_t *nat = (native_data_t *) calloc(1, sizeof(native_data_t)); - if (nat == NULL) { - LOGE("%s: out of memory!", __FUNCTION__); - return JNI_FALSE; - } - - pthread_mutex_init(&nat->mutex, NULL); - env->SetIntField(object, field_mNativeData, (jint)nat); - nat->signal_sk = -1; - nat->object = NULL; - nat->thread_data = NULL; - -#endif - return JNI_TRUE; -} - -static void destroyNative(JNIEnv* env, jobject object) { - LOGV(__FUNCTION__); -#ifdef HAVE_BLUETOOTH - native_data_t *nat = get_native_data(env, object); - - closeNative(env, object); - - pthread_mutex_lock(&nat->mutex); - if (nat->thread_data != NULL) { - nat->thread_data->nat = NULL; - } - pthread_mutex_unlock(&nat->mutex); - pthread_mutex_destroy(&nat->mutex); - - free(nat); -#endif -} - -static jboolean acceptNative(JNIEnv *env, jobject object) { - LOGV(__FUNCTION__); -#ifdef HAVE_BLUETOOTH - native_data_t *nat = get_native_data(env, object); - int signal_sks[2]; - pthread_t thread; - struct thread_data_t *data = NULL; - - pthread_mutex_lock(&nat->mutex); - if (nat->signal_sk != -1) { - pthread_mutex_unlock(&nat->mutex); - return JNI_FALSE; - } - - // setup socketpair to pass messages between threads - if (socketpair(AF_UNIX, SOCK_STREAM, 0, signal_sks) < 0) { - LOGE("%s: socketpair() failed: %s", __FUNCTION__, strerror(errno)); - pthread_mutex_unlock(&nat->mutex); - return JNI_FALSE; - } - nat->signal_sk = signal_sks[0]; - nat->object = env->NewGlobalRef(object); - - data = (thread_data_t *)calloc(1, sizeof(thread_data_t)); - if (data == NULL) { - LOGE("%s: out of memory", __FUNCTION__); - pthread_mutex_unlock(&nat->mutex); - return JNI_FALSE; - } - nat->thread_data = data; - pthread_mutex_unlock(&nat->mutex); - - data->signal_sk = signal_sks[1]; - data->nat = nat; - data->is_accept = true; - - if (pthread_create(&thread, NULL, &work_thread, (void *)data) < 0) { - LOGE("%s: pthread_create() failed: %s", __FUNCTION__, strerror(errno)); - return JNI_FALSE; - } - return JNI_TRUE; - -#endif - return JNI_FALSE; -} - -static jboolean connectNative(JNIEnv *env, jobject object, jstring address) { - LOGV(__FUNCTION__); -#ifdef HAVE_BLUETOOTH - native_data_t *nat = get_native_data(env, object); - int signal_sks[2]; - pthread_t thread; - struct thread_data_t *data; - const char *c_address; - - pthread_mutex_lock(&nat->mutex); - if (nat->signal_sk != -1) { - pthread_mutex_unlock(&nat->mutex); - return JNI_FALSE; - } - - // setup socketpair to pass messages between threads - if (socketpair(AF_UNIX, SOCK_STREAM, 0, signal_sks) < 0) { - LOGE("%s: socketpair() failed: %s\n", __FUNCTION__, strerror(errno)); - pthread_mutex_unlock(&nat->mutex); - return JNI_FALSE; - } - nat->signal_sk = signal_sks[0]; - nat->object = env->NewGlobalRef(object); - - data = (thread_data_t *)calloc(1, sizeof(thread_data_t)); - if (data == NULL) { - LOGE("%s: out of memory", __FUNCTION__); - pthread_mutex_unlock(&nat->mutex); - return JNI_FALSE; - } - pthread_mutex_unlock(&nat->mutex); - - data->signal_sk = signal_sks[1]; - data->nat = nat; - c_address = env->GetStringUTFChars(address, NULL); - strlcpy(data->address, c_address, BTADDR_SIZE); - env->ReleaseStringUTFChars(address, c_address); - data->is_accept = false; - - if (pthread_create(&thread, NULL, &work_thread, (void *)data) < 0) { - LOGE("%s: pthread_create() failed: %s", __FUNCTION__, strerror(errno)); - return JNI_FALSE; - } - return JNI_TRUE; - -#endif - return JNI_FALSE; -} - -static void closeNative(JNIEnv *env, jobject object) { - LOGV(__FUNCTION__); -#ifdef HAVE_BLUETOOTH - native_data_t *nat = get_native_data(env, object); - int signal_sk; - - pthread_mutex_lock(&nat->mutex); - signal_sk = nat->signal_sk; - nat->signal_sk = -1; - env->DeleteGlobalRef(nat->object); - nat->object = NULL; - pthread_mutex_unlock(&nat->mutex); - - if (signal_sk >= 0) { - LOGV("%s: signal_sk = %d", __FUNCTION__, signal_sk); - unsigned char dummy; - write(signal_sk, &dummy, sizeof(dummy)); - close(signal_sk); - } -#endif -} - -#ifdef HAVE_BLUETOOTH -/* thread entry point */ -static void *work_thread(void *arg) { - JNIEnv* env; - thread_data_t *data = (thread_data_t *)arg; - int sk; - - LOGV(__FUNCTION__); - if (jvm->AttachCurrentThread(&env, NULL) != JNI_OK) { - LOGE("%s: AttachCurrentThread() failed", __FUNCTION__); - return NULL; - } - - /* connect the SCO socket */ - if (data->is_accept) { - LOGV("SCO OBJECT %p ACCEPT #####", data->nat->object); - sk = accept_work(data->signal_sk); - LOGV("SCO OBJECT %p END ACCEPT *****", data->nat->object); - } else { - sk = connect_work(data->address); - } - - /* callback with connection result */ - if (data->nat == NULL) { - LOGV("%s: object destroyed!", __FUNCTION__); - goto done; - } - pthread_mutex_lock(&data->nat->mutex); - if (data->nat->object == NULL) { - pthread_mutex_unlock(&data->nat->mutex); - LOGV("%s: callback cancelled", __FUNCTION__); - goto done; - } - if (data->is_accept) { - env->CallVoidMethod(data->nat->object, method_onAccepted, sk); - } else { - env->CallVoidMethod(data->nat->object, method_onConnected, sk); - } - pthread_mutex_unlock(&data->nat->mutex); - - if (sk < 0) { - goto done; - } - - LOGV("SCO OBJECT %p %d CONNECTED +++ (%s)", data->nat->object, sk, - data->is_accept ? "in" : "out"); - - /* wait for the socket to close */ - LOGV("wait_for_close()..."); - wait_for_close(sk, data->signal_sk); - LOGV("wait_for_close() returned"); - - /* callback with close result */ - if (data->nat == NULL) { - LOGV("%s: object destroyed!", __FUNCTION__); - goto done; - } - pthread_mutex_lock(&data->nat->mutex); - if (data->nat->object == NULL) { - LOGV("%s: callback cancelled", __FUNCTION__); - } else { - env->CallVoidMethod(data->nat->object, method_onClosed); - } - pthread_mutex_unlock(&data->nat->mutex); - -done: - if (sk >= 0) { - close(sk); - LOGV("SCO OBJECT %p %d CLOSED --- (%s)", data->nat->object, sk, data->is_accept ? "in" : "out"); - } - if (data->signal_sk >= 0) { - close(data->signal_sk); - } - LOGV("SCO socket closed"); - - if (data->nat != NULL) { - pthread_mutex_lock(&data->nat->mutex); - env->DeleteGlobalRef(data->nat->object); - data->nat->object = NULL; - data->nat->thread_data = NULL; - pthread_mutex_unlock(&data->nat->mutex); - } - - free(data); - if (jvm->DetachCurrentThread() != JNI_OK) { - LOGE("%s: DetachCurrentThread() failed", __FUNCTION__); - } - - LOGV("work_thread() done"); - return NULL; -} - -static int accept_work(int signal_sk) { - LOGV(__FUNCTION__); - int sk; - int nsk; - int addr_sz; - int max_fd; - fd_set fds; - struct sockaddr_sco addr; - - sk = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_SCO); - if (sk < 0) { - LOGE("%s socket() failed: %s", __FUNCTION__, strerror(errno)); - return -1; - } - - memset(&addr, 0, sizeof(addr)); - addr.sco_family = AF_BLUETOOTH; - memcpy(&addr.sco_bdaddr, BDADDR_ANY, sizeof(bdaddr_t)); - if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) { - LOGE("%s bind() failed: %s", __FUNCTION__, strerror(errno)); - goto error; - } - - if (listen(sk, 1)) { - LOGE("%s: listen() failed: %s", __FUNCTION__, strerror(errno)); - goto error; - } - - memset(&addr, 0, sizeof(addr)); - addr_sz = sizeof(addr); - - FD_ZERO(&fds); - FD_SET(sk, &fds); - FD_SET(signal_sk, &fds); - - max_fd = (sk > signal_sk) ? sk : signal_sk; - LOGI("Listening SCO socket..."); - while (select(max_fd + 1, &fds, NULL, NULL, NULL) < 0) { - if (errno != EINTR) { - LOGE("%s: select() failed: %s", __FUNCTION__, strerror(errno)); - goto error; - } - LOGV("%s: select() EINTR, retrying", __FUNCTION__); - } - LOGV("select() returned"); - if (FD_ISSET(signal_sk, &fds)) { - // signal to cancel listening - LOGV("cancelled listening socket, closing"); - goto error; - } - if (!FD_ISSET(sk, &fds)) { - LOGE("error: select() returned >= 0 with no fds set"); - goto error; - } - - nsk = accept(sk, (struct sockaddr *)&addr, &addr_sz); - if (nsk < 0) { - LOGE("%s: accept() failed: %s", __FUNCTION__, strerror(errno)); - goto error; - } - LOGI("Connected SCO socket (incoming)"); - close(sk); // The listening socket - - return nsk; - -error: - close(sk); - - return -1; -} - -static int connect_work(const char *address) { - LOGV(__FUNCTION__); - struct sockaddr_sco addr; - int sk = -1; - - sk = socket(PF_BLUETOOTH, SOCK_SEQPACKET, BTPROTO_SCO); - if (sk < 0) { - LOGE("%s: socket() failed: %s", __FUNCTION__, strerror(errno)); - return -1; - } - - /* Bind to local address */ - memset(&addr, 0, sizeof(addr)); - addr.sco_family = AF_BLUETOOTH; - memcpy(&addr.sco_bdaddr, BDADDR_ANY, sizeof(bdaddr_t)); - if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)) < 0) { - LOGE("%s: bind() failed: %s", __FUNCTION__, strerror(errno)); - goto error; - } - - memset(&addr, 0, sizeof(addr)); - addr.sco_family = AF_BLUETOOTH; - get_bdaddr(address, &addr.sco_bdaddr); - LOGI("Connecting to socket"); - while (connect(sk, (struct sockaddr *)&addr, sizeof(addr)) < 0) { - if (errno != EINTR) { - LOGE("%s: connect() failed: %s", __FUNCTION__, strerror(errno)); - goto error; - } - LOGV("%s: connect() EINTR, retrying", __FUNCTION__); - } - LOGI("SCO socket connected (outgoing)"); - - return sk; - -error: - if (sk >= 0) close(sk); - return -1; -} - -static void wait_for_close(int sk, int signal_sk) { - LOGV(__FUNCTION__); - pollfd p[2]; - - memset(p, 0, 2 * sizeof(pollfd)); - p[0].fd = sk; - p[1].fd = signal_sk; - p[1].events = POLLIN | POLLPRI; - - LOGV("poll..."); - - while (poll(p, 2, -1) < 0) { // blocks - if (errno != EINTR) { - LOGE("%s: poll() failed: %s", __FUNCTION__, strerror(errno)); - break; - } - LOGV("%s: poll() EINTR, retrying", __FUNCTION__); - } - - LOGV("poll() returned"); -} -#endif - -static JNINativeMethod sMethods[] = { - {"classInitNative", "()V", (void*)classInitNative}, - {"initNative", "()V", (void *)initNative}, - {"destroyNative", "()V", (void *)destroyNative}, - {"connectNative", "(Ljava/lang/String;)Z", (void *)connectNative}, - {"acceptNative", "()Z", (void *)acceptNative}, - {"closeNative", "()V", (void *)closeNative}, -}; - -int register_android_bluetooth_ScoSocket(JNIEnv *env) { - return AndroidRuntime::registerNativeMethods(env, - "android/bluetooth/ScoSocket", sMethods, NELEM(sMethods)); -} - -} /* namespace android */ |