// SPDX-License-Identifier: GPL-2.0-only
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/*
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* ionapp_import.c
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*
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* It is a user space utility to receive android ion memory buffer fd
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* over unix domain socket IPC that can be exported by ionapp_export.
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* This acts like a client for ionapp_export.
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*
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* Copyright (C) 2017 Pintu Kumar <pintu.ping@gmail.com>
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include "ionutils.h"
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#include "ipcsocket.h"
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int main(void)
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{
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int ret, status;
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int sockfd, shared_fd;
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unsigned char *map_buf;
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unsigned long map_len;
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struct ion_buffer_info info;
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struct socket_info skinfo;
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/* This is the client part. Here 0 means client or importer */
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status = opensocket(&sockfd, SOCKET_NAME, 0);
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if (status < 0) {
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fprintf(stderr, "No exporter exists...\n");
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ret = status;
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goto err_socket;
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}
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skinfo.sockfd = sockfd;
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ret = socket_receive_fd(&skinfo);
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if (ret < 0) {
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fprintf(stderr, "Failed: socket_receive_fd\n");
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goto err_recv;
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}
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shared_fd = skinfo.datafd;
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printf("Received buffer fd: %d\n", shared_fd);
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if (shared_fd <= 0) {
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fprintf(stderr, "ERROR: improper buf fd\n");
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ret = -1;
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goto err_fd;
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}
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memset(&info, 0, sizeof(info));
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info.buffd = shared_fd;
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info.buflen = ION_BUFFER_LEN;
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ret = ion_import_buffer_fd(&info);
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if (ret < 0) {
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fprintf(stderr, "Failed: ion_use_buffer_fd\n");
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goto err_import;
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}
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map_buf = info.buffer;
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map_len = info.buflen;
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read_buffer(map_buf, map_len);
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/* Write probably new data to the same buffer again */
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map_len = ION_BUFFER_LEN;
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write_buffer(map_buf, map_len);
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err_import:
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ion_close_buffer_fd(&info);
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err_fd:
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err_recv:
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err_socket:
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closesocket(sockfd, SOCKET_NAME);
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return ret;
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}
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