/*
 * Copyright (C) 2017 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 _GNU_SOURCE

#include <unistd.h>
#include <stdio.h>
#include <dirent.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <string.h>
#include <dlfcn.h>
#include <sys/time.h>
#include <sys/mman.h>
#include <sys/syscall.h>
#include <sys/resource.h>
#include <fcntl.h>
#include <pthread.h>
#include <unistd.h>
#include <sched.h>
#include <stdlib.h>
#include <errno.h>

#define MSG_REQUEST  0x2

struct voice_svc_write_msg {
    __u32 msg_type;
    __u8 payload[0];
};

int main() {
    int g_fd = 0;
    char* dev_path = "/dev/voice_svc";

    g_fd = open(dev_path, O_RDWR);
    if (g_fd < 0) {
        return -1;
    }

    int size = sizeof(struct voice_svc_write_msg) + 4;
    char* msg = (char*)malloc(size);

    (msg + 4)[0] = 'A';
    (msg + 4)[1] = 'A';
    (msg + 4)[2] = 'A';
    (msg + 4)[3] = 'A';
    ((struct voice_svc_write_msg*)msg)->msg_type = MSG_REQUEST;

    int i;
    for (i = 0; i < 20; ++i) {
        write(g_fd, msg, size);
        sleep(1);
    }

    return 0;
}