1 /*
2 * Copyright 2017, 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 "dhcpclient.h"
18 #include "log.h"
19
usage(const char * program)20 static void usage(const char* program) {
21 ALOGE("Usage: %s [--no-gateway] -i <interface>", program);
22 ALOGE(" If the optional parameter --no-gateway is specified the client");
23 ALOGE(" will not configure the default gateway of the system.");
24 }
25
main(int argc,char * argv[])26 int main(int argc, char* argv[]) {
27 if (argc < 3) {
28 usage(argv[0]);
29 return 1;
30 }
31 const char* interfaceName = nullptr;
32 uint32_t options = 0;
33
34 for (int i = 1; i < argc; ++i) {
35 if (strcmp(argv[i], "-i") == 0) {
36 if (i + 1 < argc) {
37 interfaceName = argv[++i];
38 } else {
39 ALOGE("ERROR: -i parameter needs an argument");
40 usage(argv[0]);
41 return 1;
42 }
43 } else if (strcmp(argv[i], "--no-gateway") == 0) {
44 options |= static_cast<uint32_t>(ClientOption::NoGateway);
45 } else {
46 ALOGE("ERROR: unknown parameters %s", argv[i]);
47 usage(argv[0]);
48 return 1;
49 }
50 }
51 if (interfaceName == nullptr) {
52 ALOGE("ERROR: No interface specified");
53 usage(argv[0]);
54 return 1;
55 }
56
57 DhcpClient client(options);
58 Result res = client.init(interfaceName);
59 if (!res) {
60 ALOGE("Failed to initialize DHCP client: %s\n", res.c_str());
61 return 1;
62 }
63
64 res = client.run();
65 if (!res) {
66 ALOGE("DHCP client failed: %s\n", res.c_str());
67 return 1;
68 }
69 // This is weird and shouldn't happen, the client should run forever.
70 return 0;
71 }
72
73