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Serenity Operating System
1/*
2 * Copyright (c) 2020, The SerenityOS developers.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice, this
9 * list of conditions and the following disclaimer.
10 *
11 * 2. Redistributions in binary form must reproduce the above copyright notice,
12 * this list of conditions and the following disclaimer in the documentation
13 * and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
22 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
23 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "DHCPv4Client.h"
28#include <AK/JsonArray.h>
29#include <AK/JsonObject.h>
30#include <AK/String.h>
31#include <AK/Types.h>
32#include <LibCore/EventLoop.h>
33#include <LibCore/File.h>
34#include <LibCore/LocalServer.h>
35#include <stdio.h>
36#include <string.h>
37
38static u8 mac_part(const Vector<String>& parts, size_t index)
39{
40 auto chars = parts.at(index).characters();
41 return (chars[0] - '0') * 16 + (chars[1] - '0');
42}
43
44static MACAddress mac_from_string(const String& str)
45{
46 auto chunks = str.split(':');
47 ASSERT(chunks.size() == 6); // should we...worry about this?
48 return {
49 mac_part(chunks, 0), mac_part(chunks, 1), mac_part(chunks, 2),
50 mac_part(chunks, 3), mac_part(chunks, 4), mac_part(chunks, 5)
51 };
52}
53
54int main(int argc, char** argv)
55{
56 (void)argc;
57 (void)argv;
58
59 if (pledge("stdio unix inet cpath rpath fattr", nullptr) < 0) {
60 perror("pledge");
61 return 1;
62 }
63
64 Core::EventLoop event_loop;
65
66 if (unveil("/proc/net/", "r") < 0) {
67 perror("unveil");
68 return 1;
69 }
70
71 unveil(nullptr, nullptr);
72
73 auto file = Core::File::construct("/proc/net/adapters");
74 if (!file->open(Core::IODevice::ReadOnly)) {
75 fprintf(stderr, "Error: %s\n", file->error_string());
76 return 1;
77 }
78
79 auto file_contents = file->read_all();
80 auto json = JsonValue::from_string(file_contents).as_array();
81 Vector<InterfaceDescriptor> ifnames;
82 json.for_each([&ifnames](auto& value) {
83 auto if_object = value.as_object();
84
85 if (if_object.get("class_name").to_string() == "LoopbackAdapter")
86 return;
87
88 auto name = if_object.get("name").to_string();
89 auto mac = if_object.get("mac_address").to_string();
90 ifnames.append({ name, mac_from_string(mac) });
91 });
92
93 auto client = DHCPv4Client::construct(move(ifnames));
94
95 if (pledge("stdio inet", nullptr) < 0) {
96 perror("pledge");
97 return 1;
98 }
99
100 return event_loop.exec();
101}