1/*
2 * Copyright (C) 2016 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
18#include <arpa/inet.h>
19#include <errno.h>
20#include <netdb.h>
21#include <netinet/in.h>
22#include <string.h>
23#include <sys/socket.h>
24
25#include <iostream>
26#include <string>
27
28#include <android/multinetwork.h>
29#include "common.h"
30
31
32int main(int argc, const char* argv[]) {
33    int rval = -1;
34
35    struct Arguments args;
36    if (!args.parseArguments(argc, argv)) { return rval; }
37
38    const struct addrinfo hints = {
39            .ai_family = args.family,
40            .ai_socktype = SOCK_DGRAM,
41    };
42    struct addrinfo *result = nullptr;
43
44    std::cout << "# " << args.arg1
45              << " (via nethandle " << args.nethandle << "):"
46              << std::endl;
47
48    switch (args.api_mode) {
49        case ApiMode::EXPLICIT:
50            rval = android_getaddrinfofornetwork(args.nethandle,
51                    args.arg1, nullptr, &hints, &result);
52            break;
53        case ApiMode::PROCESS:
54            if (args.nethandle != NETWORK_UNSPECIFIED) {
55                rval = android_setprocnetwork(args.nethandle);
56                if (rval != 0) {
57                    std::cerr << "android_setprocnetwork returned " << rval
58                              << std::endl;
59                    return rval;
60                }
61            }
62            rval = getaddrinfo(args.arg1, nullptr, &hints, &result);
63            break;
64        default:
65            // Unreachable.
66            std::cerr << "Unknown api mode." << std::endl;
67            return -1;
68    }
69
70    if (rval != 0) {
71        std::cerr << "DNS resolution failure; gaierror=" << rval
72                  << " [" << gai_strerror(rval) << "]"
73                  << std::endl;
74        return rval;
75    }
76
77    for (struct addrinfo* rp = result; rp != nullptr; rp = rp->ai_next) {
78        std::cout << inetSockaddrToString(rp->ai_addr) << std::endl;
79    }
80
81    freeaddrinfo(result);
82    return 0;
83}
84