27b0b3f770
Needed to handle EINTR robustly. Test: m libtrusty Change-Id: I46a58ae911fd8db3d3528e24edbb6013d807b48c
73 lines
2 KiB
C
73 lines
2 KiB
C
/*
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* Copyright (C) 2020 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "libtrusty"
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#include <errno.h>
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#include <fcntl.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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#include <log/log.h>
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#include <trusty/ipc.h>
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int tipc_connect(const char* dev_name, const char* srv_name) {
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int fd;
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int rc;
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fd = TEMP_FAILURE_RETRY(open(dev_name, O_RDWR));
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if (fd < 0) {
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rc = -errno;
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ALOGE("%s: cannot open tipc device \"%s\": %s\n", __func__, dev_name, strerror(errno));
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return rc < 0 ? rc : -1;
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}
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rc = TEMP_FAILURE_RETRY(ioctl(fd, TIPC_IOC_CONNECT, srv_name));
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if (rc < 0) {
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rc = -errno;
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ALOGE("%s: can't connect to tipc service \"%s\" (err=%d)\n", __func__, srv_name, errno);
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close(fd);
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return rc < 0 ? rc : -1;
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}
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ALOGV("%s: connected to \"%s\" fd %d\n", __func__, srv_name, fd);
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return fd;
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}
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ssize_t tipc_send(int fd, const struct iovec* iov, int iovcnt, struct trusty_shm* shms,
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int shmcnt) {
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struct tipc_send_msg_req req;
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req.iov = (__u64)iov;
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req.iov_cnt = (__u64)iovcnt;
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req.shm = (__u64)shms;
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req.shm_cnt = (__u64)shmcnt;
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int rc = TEMP_FAILURE_RETRY(ioctl(fd, TIPC_IOC_SEND_MSG, &req));
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if (rc < 0) {
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ALOGE("%s: failed to send message (err=%d)\n", __func__, rc);
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}
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return rc;
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}
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void tipc_close(int fd) {
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close(fd);
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}
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