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/*
* ionapp_import.c
*
* It is a user space utility to receive android ion memory buffer fd
* over unix domain socket IPC that can be exported by ionapp_export.
* This acts like a client for ionapp_export.
*
* Copyright (C) 2017 Pintu Kumar <pintu.ping@gmail.com>
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "ionutils.h"
#include "ipcsocket.h"
int main(void)
{
int ret, status;
int sockfd, shared_fd;
unsigned char *map_buf;
unsigned long map_len;
struct ion_buffer_info info;
struct socket_info skinfo;
/* This is the client part. Here 0 means client or importer */
status = opensocket(&sockfd, SOCKET_NAME, 0);
if (status < 0) {
fprintf(stderr, "No exporter exists...\n");
ret = status;
goto err_socket;
}
skinfo.sockfd = sockfd;
ret = socket_receive_fd(&skinfo);
if (ret < 0) {
fprintf(stderr, "Failed: socket_receive_fd\n");
goto err_recv;
}
shared_fd = skinfo.datafd;
printf("Received buffer fd: %d\n", shared_fd);
if (shared_fd <= 0) {
fprintf(stderr, "ERROR: improper buf fd\n");
ret = -1;
goto err_fd;
}
memset(&info, 0, sizeof(info));
info.buffd = shared_fd;
info.buflen = ION_BUFFER_LEN;
ret = ion_import_buffer_fd(&info);
if (ret < 0) {
fprintf(stderr, "Failed: ion_use_buffer_fd\n");
goto err_import;
}
map_buf = info.buffer;
map_len = info.buflen;
read_buffer(map_buf, map_len);
/* Write probably new data to the same buffer again */
map_len = ION_BUFFER_LEN;
write_buffer(map_buf, map_len);
err_import:
ion_close_buffer_fd(&info);
err_fd:
err_recv:
err_socket:
closesocket(sockfd, SOCKET_NAME);
return ret;
}
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