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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Assertions.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', "The new IP of the network");
args_parser.add_option(value_adapter, "Select a specific network adapter to configure", "adapter", 'a', "The name of a network adapter");
args_parser.add_option(value_gateway, "Set the default gateway of the selected network", "gateway", 'g', "The new IP of the gateway");
args_parser.add_option(value_mask, "Set the network mask of the selected network", "mask", 'm', "The new network 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)) {
fprintf(stderr, "Error: %s\n", 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();
printf("%s:\n", name.characters());
printf("\tmac: %s\n", mac_address.characters());
printf("\tipv4: %s\n", ipv4_address.characters());
printf("\tnetmask: %s\n", netmask.characters());
printf("\tgateway: %s\n", gateway.characters());
printf("\tclass: %s\n", class_name.characters());
printf("\tRX: %u packets %u bytes (%s)\n", packets_in, bytes_in, human_readable_size(bytes_in).characters());
printf("\tTX: %u packets %u bytes (%s)\n", packets_out, bytes_out, human_readable_size(bytes_out).characters());
printf("\tMTU: %u\n", mtu);
printf("\n");
});
} else {
if (!value_adapter) {
fprintf(stderr, "No network adapter was specified.\n");
return 1;
}
String ifname = value_adapter;
if (value_ipv4) {
auto address = IPv4Address::from_string(value_ipv4);
if (!address.has_value()) {
fprintf(stderr, "Invalid IPv4 address: '%s'\n", 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) {
fprintf(stderr, "Interface name '%s' is too long\n", ifname.characters());
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()) {
fprintf(stderr, "Invalid IPv4 mask: '%s'\n", 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) {
fprintf(stderr, "Interface name '%s' is too long\n", ifname.characters());
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;
}
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