1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Assertions.h>
#include <AK/IPv4Address.h>
#include <AK/JsonArray.h>
#include <AK/JsonObject.h>
#include <AK/NumberFormat.h>
#include <AK/String.h>
#include <AK/Types.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <net/if.h>
#include <net/route.h>
#include <netinet/in.h>
#include <stdio.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
int main(int argc, char** argv)
{
const char* value_ipv4 = nullptr;
const char* value_adapter = nullptr;
const char* value_gateway = nullptr;
const char* value_mask = nullptr;
Core::ArgsParser args_parser;
args_parser.set_general_help("Display or modify the configuration of each network interface.");
args_parser.add_option(value_ipv4, "Set the IP address of the selected network", "ipv4", 'i', "ip");
args_parser.add_option(value_adapter, "Select a specific network adapter to configure", "adapter", 'a', "adapter");
args_parser.add_option(value_gateway, "Set the default gateway of the selected network", "gateway", 'g', "gateway");
args_parser.add_option(value_mask, "Set the network mask of the selected network", "mask", 'm', "mask");
args_parser.parse(argc, argv);
if (!value_ipv4 && !value_adapter && !value_gateway && !value_mask) {
auto file = Core::File::construct("/proc/net/adapters");
if (!file->open(Core::OpenMode::ReadOnly)) {
outln("Failed to open {}: {}", file->name(), file->error_string());
return 1;
}
auto file_contents = file->read_all();
auto json = JsonValue::from_string(file_contents);
VERIFY(json.has_value());
json.value().as_array().for_each([](auto& value) {
auto& if_object = value.as_object();
auto name = if_object.get("name").to_string();
auto class_name = if_object.get("class_name").to_string();
auto mac_address = if_object.get("mac_address").to_string();
auto ipv4_address = if_object.get("ipv4_address").to_string();
auto gateway = if_object.get("ipv4_gateway").to_string();
auto netmask = if_object.get("ipv4_netmask").to_string();
auto packets_in = if_object.get("packets_in").to_u32();
auto bytes_in = if_object.get("bytes_in").to_u32();
auto packets_out = if_object.get("packets_out").to_u32();
auto bytes_out = if_object.get("bytes_out").to_u32();
auto mtu = if_object.get("mtu").to_u32();
outln("{}:", name);
outln("\tmac: {}", mac_address);
outln("\tipv4: {}", ipv4_address);
outln("\tnetmask: {}", netmask);
outln("\tgateway: {}", gateway);
outln("\tclass: {}", class_name);
outln("\tRX: {} packets {} bytes ({})", packets_in, bytes_in, human_readable_size(bytes_in));
outln("\tTX: {} packets {} bytes ({})", packets_out, bytes_out, human_readable_size(bytes_out));
outln("\tMTU: {}", mtu);
outln();
});
} else {
if (!value_adapter) {
warnln("No network adapter was specified.");
return 1;
}
String ifname = value_adapter;
if (value_ipv4) {
auto address = IPv4Address::from_string(value_ipv4);
if (!address.has_value()) {
warnln("Invalid IPv4 address: '{}'", value_ipv4);
return 1;
}
int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
if (fd < 0) {
perror("socket");
return 1;
}
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
bool fits = ifname.copy_characters_to_buffer(ifr.ifr_name, IFNAMSIZ);
if (!fits) {
warnln("Interface name '{}' is too long", ifname);
return 1;
}
ifr.ifr_addr.sa_family = AF_INET;
((sockaddr_in&)ifr.ifr_addr).sin_addr.s_addr = address.value().to_in_addr_t();
int rc = ioctl(fd, SIOCSIFADDR, &ifr);
if (rc < 0) {
perror("ioctl(SIOCSIFADDR)");
return 1;
}
}
if (value_mask) {
auto address = IPv4Address::from_string(value_mask);
if (!address.has_value()) {
warnln("Invalid IPv4 mask: '{}'", value_mask);
return 1;
}
int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
if (fd < 0) {
perror("socket");
return 1;
}
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
bool fits = ifname.copy_characters_to_buffer(ifr.ifr_name, IFNAMSIZ);
if (!fits) {
warnln("Interface name '{}' is too long", ifname);
return 1;
}
ifr.ifr_netmask.sa_family = AF_INET;
((sockaddr_in&)ifr.ifr_netmask).sin_addr.s_addr = address.value().to_in_addr_t();
int rc = ioctl(fd, SIOCSIFNETMASK, &ifr);
if (rc < 0) {
perror("ioctl(SIOCSIFNETMASK)");
return 1;
}
}
if (value_gateway) {
auto address = IPv4Address::from_string(value_gateway);
int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_IP);
if (fd < 0) {
perror("socket");
return 1;
}
struct rtentry rt;
memset(&rt, 0, sizeof(rt));
rt.rt_dev = const_cast<char*>(ifname.characters());
rt.rt_gateway.sa_family = AF_INET;
((sockaddr_in&)rt.rt_gateway).sin_addr.s_addr = address.value().to_in_addr_t();
rt.rt_flags = RTF_UP | RTF_GATEWAY;
int rc = ioctl(fd, SIOCADDRT, &rt);
if (rc < 0) {
perror("ioctl(SIOCADDRT)");
return 1;
}
}
}
return 0;
}
|
