1 /*
2 * Copyright (C) 2020 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define LOG_TAG "libtrusty"
18
19 #include <errno.h>
20 #include <fcntl.h>
21 #include <stdbool.h>
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <string.h>
25 #include <sys/ioctl.h>
26 #include <unistd.h>
27
28 #include <log/log.h>
29
30 #include <trusty/ipc.h>
31
tipc_connect(const char * dev_name,const char * srv_name)32 int tipc_connect(const char* dev_name, const char* srv_name) {
33 int fd;
34 int rc;
35
36 fd = TEMP_FAILURE_RETRY(open(dev_name, O_RDWR));
37 if (fd < 0) {
38 rc = -errno;
39 ALOGE("%s: cannot open tipc device \"%s\": %s\n", __func__, dev_name, strerror(errno));
40 return rc < 0 ? rc : -1;
41 }
42
43 rc = TEMP_FAILURE_RETRY(ioctl(fd, TIPC_IOC_CONNECT, srv_name));
44 if (rc < 0) {
45 rc = -errno;
46 ALOGE("%s: can't connect to tipc service \"%s\" (err=%d)\n", __func__, srv_name, errno);
47 close(fd);
48 return rc < 0 ? rc : -1;
49 }
50
51 ALOGV("%s: connected to \"%s\" fd %d\n", __func__, srv_name, fd);
52 return fd;
53 }
54
tipc_send(int fd,const struct iovec * iov,int iovcnt,struct trusty_shm * shms,int shmcnt)55 ssize_t tipc_send(int fd, const struct iovec* iov, int iovcnt, struct trusty_shm* shms,
56 int shmcnt) {
57 struct tipc_send_msg_req req;
58 req.iov = (__u64)iov;
59 req.iov_cnt = (__u64)iovcnt;
60 req.shm = (__u64)shms;
61 req.shm_cnt = (__u64)shmcnt;
62
63 int rc = TEMP_FAILURE_RETRY(ioctl(fd, TIPC_IOC_SEND_MSG, &req));
64 if (rc < 0) {
65 ALOGE("%s: failed to send message (err=%d)\n", __func__, rc);
66 }
67
68 return rc;
69 }
70
tipc_close(int fd)71 void tipc_close(int fd) {
72 close(fd);
73 }
74