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Serenity Operating System
1/*
2 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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 <AK/JsonArray.h>
28#include <AK/JsonObject.h>
29#include <AK/String.h>
30#include <AK/Types.h>
31#include <LibCore/ArgsParser.h>
32#include <LibCore/File.h>
33#include <net/if.h>
34#include <net/route.h>
35#include <netinet/in.h>
36#include <stdio.h>
37#include <string.h>
38#include <sys/ioctl.h>
39#include <sys/socket.h>
40
41String si_bytes(unsigned bytes)
42{
43 if (bytes >= GB)
44 return String::format("%fGiB", (double)bytes / (double)GB);
45 if (bytes >= MB)
46 return String::format("%fMiB", (double)bytes / (double)MB);
47 if (bytes >= KB)
48 return String::format("%fKiB", (double)bytes / (double)KB);
49 return String::format("%dB", bytes);
50}
51
52int main(int argc, char** argv)
53{
54 const char* value_ipv4 = nullptr;
55 const char* value_adapter = nullptr;
56 const char* value_gateway = nullptr;
57 const char* value_mask = nullptr;
58
59 Core::ArgsParser args_parser;
60 args_parser.add_option(value_ipv4, "Set the IP address of the selected network", "ipv4", 'i', "The new IP of the network");
61 args_parser.add_option(value_adapter, "Select a specific network adapter to configure", "adapter", 'a', "The name of a network adapter");
62 args_parser.add_option(value_gateway, "Set the default gateway of the selected network", "gateway", 'g', "The new IP of the gateway");
63 args_parser.add_option(value_mask, "Set the network mask of the selected network", "mask", 'm', "The new network mask");
64 args_parser.parse(argc, argv);
65
66 if (!value_ipv4 && !value_adapter && !value_gateway && !value_mask) {
67
68 auto file = Core::File::construct("/proc/net/adapters");
69 if (!file->open(Core::IODevice::ReadOnly)) {
70 fprintf(stderr, "Error: %s\n", file->error_string());
71 return 1;
72 }
73
74 auto file_contents = file->read_all();
75 auto json = JsonValue::from_string(file_contents).as_array();
76 json.for_each([](auto& value) {
77 auto if_object = value.as_object();
78
79 auto name = if_object.get("name").to_string();
80 auto class_name = if_object.get("class_name").to_string();
81 auto mac_address = if_object.get("mac_address").to_string();
82 auto ipv4_address = if_object.get("ipv4_address").to_string();
83 auto gateway = if_object.get("ipv4_gateway").to_string();
84 auto netmask = if_object.get("ipv4_netmask").to_string();
85 auto packets_in = if_object.get("packets_in").to_u32();
86 auto bytes_in = if_object.get("bytes_in").to_u32();
87 auto packets_out = if_object.get("packets_out").to_u32();
88 auto bytes_out = if_object.get("bytes_out").to_u32();
89 auto mtu = if_object.get("mtu").to_u32();
90
91 printf("%s:\n", name.characters());
92 printf("\tmac: %s\n", mac_address.characters());
93 printf("\tipv4: %s\n", ipv4_address.characters());
94 printf("\tnetmask: %s\n", netmask.characters());
95 printf("\tgateway: %s\n", gateway.characters());
96 printf("\tclass: %s\n", class_name.characters());
97 printf("\tRX: %u packets %u bytes (%s)\n", packets_in, bytes_in, si_bytes(bytes_in).characters());
98 printf("\tTX: %u packets %u bytes (%s)\n", packets_out, bytes_out, si_bytes(bytes_out).characters());
99 printf("\tMTU: %u\n", mtu);
100 printf("\n");
101 });
102 } else {
103
104 if (!value_adapter) {
105 fprintf(stderr, "No network adapter was specified.\n");
106 return 1;
107 }
108
109 String ifname = value_adapter;
110
111 if (value_ipv4) {
112 auto address = IPv4Address::from_string(value_ipv4);
113
114 if (!address.has_value()) {
115 fprintf(stderr, "Invalid IPv4 address: '%s'\n", value_ipv4);
116 return 1;
117 }
118
119 int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
120 if (fd < 0) {
121 perror("socket");
122 return 1;
123 }
124
125 struct ifreq ifr;
126 memset(&ifr, 0, sizeof(ifr));
127
128 strncpy(ifr.ifr_name, ifname.characters(), IFNAMSIZ);
129 ifr.ifr_addr.sa_family = AF_INET;
130 ((sockaddr_in&)ifr.ifr_addr).sin_addr.s_addr = address.value().to_in_addr_t();
131
132 int rc = ioctl(fd, SIOCSIFADDR, &ifr);
133 if (rc < 0) {
134 perror("ioctl(SIOCSIFADDR)");
135 return 1;
136 }
137 }
138
139 if (value_mask) {
140 auto address = IPv4Address::from_string(value_mask);
141
142 if (!address.has_value()) {
143 fprintf(stderr, "Invalid IPv4 mask: '%s'\n", value_mask);
144 return 1;
145 }
146
147 int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
148 if (fd < 0) {
149 perror("socket");
150 return 1;
151 }
152
153 struct ifreq ifr;
154 memset(&ifr, 0, sizeof(ifr));
155
156 strncpy(ifr.ifr_name, ifname.characters(), IFNAMSIZ);
157 ifr.ifr_netmask.sa_family = AF_INET;
158 ((sockaddr_in&)ifr.ifr_netmask).sin_addr.s_addr = address.value().to_in_addr_t();
159
160 int rc = ioctl(fd, SIOCSIFNETMASK, &ifr);
161 if (rc < 0) {
162 perror("ioctl(SIOCSIFNETMASK)");
163 return 1;
164 }
165 }
166
167 if (value_gateway) {
168 auto address = IPv4Address::from_string(value_gateway);
169
170 int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
171 if (fd < 0) {
172 perror("socket");
173 return 1;
174 }
175
176 struct rtentry rt;
177 memset(&rt, 0, sizeof(rt));
178
179 rt.rt_dev = const_cast<char*>(ifname.characters());
180 rt.rt_gateway.sa_family = AF_INET;
181 ((sockaddr_in&)rt.rt_gateway).sin_addr.s_addr = address.value().to_in_addr_t();
182 rt.rt_flags = RTF_UP | RTF_GATEWAY;
183
184 int rc = ioctl(fd, SIOCADDRT, &rt);
185 if (rc < 0) {
186 perror("ioctl(SIOCADDRT)");
187 return 1;
188 }
189 }
190 }
191 return 0;
192}