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/*
* Copyright (c) 2019 Cisco and/or its affiliates.
*
* 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 <vnet/vnet.h>
#include <jni.h>
#include "io_fd_jvpp_stats_VppStatsJNIConnection.h"
#include "io_fd_jvpp_stats_JVppStatsRegistryImpl.h"
#include <jvpp-common/jvpp_common.h>
/*
* The Java runtime isn't compile w/ -fstack-protector,
* so we have to supply missing external references for the
* regular vpp libraries.
*/
void __stack_chk_guard(void) __attribute__((weak));
void __stack_chk_guard(void) {
}
typedef struct {
jobject registryObject;
jclass registryClass;
jclass callbackExceptionClass;
/* Connected indication */
volatile u8 is_connected;
u32 vpe_pid;
} jvpp_stats_registry_main_t;
jvpp_stats_registry_main_t jvpp_stats_registry_main __attribute__((aligned (64)));
// JAVA class reference cache
jclass connectionInfoClass;
jclass callbackExceptionClass;
JNIEXPORT jint JNICALL Java_io_fd_jvpp_stats_JVppStatsRegistryImpl_controlPing0(JNIEnv *env, jobject registryObject) {
u32 my_context_id = vppjni_get_context_id(&jvpp_main);
jvpp_stats_registry_main_t *rm = &jvpp_stats_registry_main;
if (rm->registryObject == 0) {
rm->registryObject = (*env)->NewGlobalRef(env, registryObject);
}
if (rm->registryClass == 0) {
rm->registryClass = (jclass) (*env)->NewGlobalRef(env, (*env)->GetObjectClass(env, registryObject));
}
rm->is_connected = 1;
return my_context_id;
}
JNIEXPORT jobject JNICALL
Java_io_fd_jvpp_stats_VppStatsJNIConnection_statsConnect(JNIEnv *env, jclass obj, jstring clientName) {
// int rv;
const char *client_name;
jvpp_main_t * jm = &jvpp_main;
jobject con_info;
jthrowable exc;
jvpp_stats_registry_main_t * rm = &jvpp_stats_registry_main;
jmethodID connectionInfoConstructor = (*env)->GetMethodID(env, connectionInfoClass, "<init>", "(JIII)V");
exc = (*env)->ExceptionOccurred(env);
if (exc) {
clib_warning(
"Unable to extract connectionInfoClass constructor. Ignoring message.\n");
(*env)->ExceptionDescribe(env);
(*env)->ExceptionClear(env);
con_info = (*env)->NewObject(env, connectionInfoClass, connectionInfoConstructor, 0, 0,
VNET_API_ERROR_INVALID_REGISTRATION, 0);
if ((*env)->ExceptionCheck(env)) {
(*env)->ExceptionDescribe(env);
(*env)->ExceptionClear(env);
clib_warning("StatsConnectionInfo: Invalid Registration!\n");
}
return con_info;
}
if (rm->is_connected) {
con_info = (*env)->NewObject(env, connectionInfoClass, connectionInfoConstructor, 0, 0,
VNET_API_ERROR_ALREADY_CONNECTED, 0);
if ((*env)->ExceptionCheck(env)) {
(*env)->ExceptionDescribe(env);
(*env)->ExceptionClear(env);
clib_warning("StatsConnectionInfo: Already connected.\n");
}
return con_info;
}
client_name = (*env)->GetStringUTFChars(env, clientName, 0);
if (!client_name) {
con_info = (*env)->NewObject(env, connectionInfoClass, connectionInfoConstructor, 0, 0,
VNET_API_ERROR_INVALID_VALUE, 0);
if ((*env)->ExceptionCheck(env)) {
(*env)->ExceptionDescribe(env);
(*env)->ExceptionClear(env);
clib_warning("StatsConnectionInfo: Invalid Client name!\n");
}
return con_info;
}
(*env)->ReleaseStringUTFChars(env, clientName, client_name);
con_info = (*env)->NewObject(env, connectionInfoClass, connectionInfoConstructor,
(jlong) pointer_to_uword(jm->vl_input_queue), (jint) jm->my_client_index, (jint) 0,
(jint) rm->vpe_pid);
if ((*env)->ExceptionCheck(env)) {
(*env)->ExceptionDescribe(env);
(*env)->ExceptionClear(env);
clib_warning("StatsConnectionInfo: Unspecified Error! Exiting.\n");
return NULL;
}
return con_info;
}
JNIEXPORT void JNICALL Java_io_fd_jvpp_stats_VppStatsJNIConnection_statsDisconnect(
JNIEnv *env, jclass clazz) {
jvpp_stats_registry_main_t * rm = &jvpp_stats_registry_main;
rm->is_connected = 0; // TODO make thread safe
// cleanup:
if (rm->registryObject) {
(*env)->DeleteGlobalRef(env, rm->registryObject);
rm->registryObject = 0;
}
if (rm->registryClass) {
(*env)->DeleteGlobalRef(env, rm->registryClass);
rm->registryClass = 0;
}
}
static int cache_class_references(JNIEnv *env) {
connectionInfoClass =
(jclass) (*env)->NewGlobalRef(env, (*env)->FindClass(env,
"io/fd/jvpp/stats/VppStatsJNIConnection$StatsConnectionInfo"));
if ((*env)->ExceptionCheck(env)) {
(*env)->ExceptionDescribe(env);
return JNI_ERR;
}
callbackExceptionClass = (jclass) (*env)->NewGlobalRef(env,
(*env)->FindClass(env, "io/fd/jvpp/VppCallbackException"));
if ((*env)->ExceptionCheck(env)) {
(*env)->ExceptionDescribe(env);
return JNI_ERR;
}
return 0;
}
static void delete_class_references(JNIEnv *env) {
if (connectionInfoClass) {
(*env)->DeleteGlobalRef(env, connectionInfoClass);
}
if (callbackExceptionClass) {
(*env)->DeleteGlobalRef(env, callbackExceptionClass);
}
}
jint JNI_OnLoad(JavaVM *vm, void *reserved) {
jvpp_main_t * jm = &jvpp_main;
jvpp_stats_registry_main_t * rm = &jvpp_stats_registry_main;
JNIEnv* env;
if ((*vm)->GetEnv(vm, (void**) &env, JNI_VERSION_1_8) != JNI_OK) {
return JNI_EVERSION;
}
if (cache_class_references(env) != 0) {
clib_warning ("Failed to cache class references\n");
return JNI_ERR;
}
rm->callbackExceptionClass = connectionInfoClass;
jm->jvm = vm;
if (cache_class_references(env) != 0) {
clib_warning ("Failed to cache class references\n");
return JNI_ERR;
}
return JNI_VERSION_1_8;
}
void JNI_OnUnload(JavaVM *vm, void *reserved) {
jvpp_main_t * jm = &jvpp_main;
jvpp_stats_registry_main_t * rm = &jvpp_stats_registry_main;
JNIEnv* env;
if ((*vm)->GetEnv(vm, (void**) &env, JNI_VERSION_1_8) != JNI_OK) {
return;
}
delete_class_references(env);
rm->callbackExceptionClass = NULL;
jm->jenv = NULL;
jm->jvm = NULL;
}
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