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 #include <sys/socket.h>
18 
19 // Needs to be included after sys/socket.h
20 #include <linux/vm_sockets.h>
21 
22 #include <iostream>
23 
24 #include "android-base/file.h"
25 #include "android-base/logging.h"
26 #include "android-base/parseint.h"
27 #include "android-base/unique_fd.h"
28 
29 using namespace android::base;
30 
31 int main(int argc, const char *argv[]) {
32     SetLogger(StderrLogger);
33 
34     unsigned int cid, port;
35     if (argc != 4 || !ParseUint(argv[1], &cid) || !ParseUint(argv[2], &port)) {
36         LOG(ERROR) << "Usage: " << argv[0] << " <cid> <port> <msg>";
37         return EXIT_FAILURE;
38     }
39     std::string msg(argv[3]);
40 
41     unique_fd fd(TEMP_FAILURE_RETRY(socket(AF_VSOCK, SOCK_STREAM, 0)));
42     if (fd < 0) {
43         PLOG(ERROR) << "socket";
44         return EXIT_FAILURE;
45     }
46 
47     struct sockaddr_vm sa = (struct sockaddr_vm){
48             .svm_family = AF_VSOCK,
49             .svm_port = port,
50             .svm_cid = cid,
51     };
52 
53     LOG(INFO) << "Connecting to CID " << cid << " on port " << port << "...";
54     int ret = TEMP_FAILURE_RETRY(connect(fd, (struct sockaddr *)&sa, sizeof(sa)));
55     if (ret < 0) {
56         PLOG(ERROR) << "connect";
57         return EXIT_FAILURE;
58     }
59 
60     LOG(INFO) << "Sending message to server...";
61     if (!WriteStringToFd(msg, fd)) {
62         PLOG(ERROR) << "WriteStringToFd";
63         return EXIT_FAILURE;
64     }
65 
66     LOG(INFO) << "Exiting...";
67     return EXIT_SUCCESS;
68 }
69