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ifconfig.cpp
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ifconfig.cpp
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/*
* Copyright (c) 2018-2020, Andreas Kling <[email protected]>
* Copyright (c) 2022, Alex Major
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Assertions.h>
#include <AK/IPv4Address.h>
#include <AK/IPv6Address.h>
#include <AK/JsonArray.h>
#include <AK/JsonObject.h>
#include <AK/NumberFormat.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <LibCore/System.h>
#include <LibMain/Main.h>
#include <net/if.h>
#include <netinet/in.h>
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
StringView value_ipv4 {};
StringView value_ipv6 {};
StringView value_adapter {};
StringView value_mask {};
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 IPv4 address of the selected network", "ipv4", 0, "ipv4");
args_parser.add_option(value_ipv6, "Set the IPv6 address of the selected network", "ipv6", 0, "ipv6");
args_parser.add_option(value_adapter, "Select a specific network adapter to configure", "adapter", 'a', "adapter");
args_parser.add_option(value_mask, "Set the network mask of the selected network", "mask", 'm', "mask");
args_parser.parse(arguments);
if (value_ipv4.is_empty() && value_adapter.is_empty() && value_mask.is_empty()) {
auto file = TRY(Core::File::open("/sys/kernel/net/adapters"sv, Core::File::OpenMode::Read));
auto file_contents = TRY(file->read_until_eof());
auto json = TRY(JsonValue::from_string(file_contents));
json.as_array().for_each([](auto& value) {
auto& if_object = value.as_object();
auto name = if_object.get_byte_string("name"sv).value_or({});
auto class_name = if_object.get_byte_string("class_name"sv).value_or({});
auto mac_address = if_object.get_byte_string("mac_address"sv).value_or({});
auto ipv4_address = if_object.get_byte_string("ipv4_address"sv).value_or({});
auto ipv4_netmask = if_object.get_byte_string("ipv4_netmask"sv).value_or({});
auto ipv6_address = if_object.get_byte_string("ipv6_address"sv).value_or({});
auto ipv6_netmask = if_object.get_byte_string("ipv6_netmask"sv).value_or({});
auto packets_in = if_object.get_u32("packets_in"sv).value_or(0);
auto bytes_in = if_object.get_u32("bytes_in"sv).value_or(0);
auto packets_out = if_object.get_u32("packets_out"sv).value_or(0);
auto bytes_out = if_object.get_u32("bytes_out"sv).value_or(0);
auto mtu = if_object.get_u32("mtu"sv).value_or(0);
outln("{}:", name);
outln("\tmac: {}", mac_address);
if (!ipv4_address.is_empty()) {
outln("\tipv4: {}", ipv4_address);
outln("\tnetmask: {}", ipv4_netmask);
}
if (!ipv6_address.is_empty()) {
outln("\tipv6: {}", ipv6_address);
// TODO: this should probably displayed as a CIDR instead for better readability
outln("\tnetmask: {}", ipv6_netmask);
}
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.is_empty()) {
warnln("No network adapter was specified.");
return 1;
}
ByteString ifname = value_adapter;
if (!value_ipv4.is_empty()) {
auto address = IPv4Address::from_string(value_ipv4);
if (!address.has_value()) {
warnln("Invalid IPv4 address: '{}'", value_ipv4);
return 1;
}
auto fd = TRY(Core::System::socket(AF_INET, SOCK_DGRAM, IPPROTO_IP));
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();
TRY(Core::System::ioctl(fd, SIOCSIFADDR, &ifr));
}
if (!value_ipv6.is_empty()) {
auto address = IPv6Address::from_string(value_ipv6);
if (!address.has_value()) {
warnln("Invalid IPv6 address: '{}'", value_ipv6);
return 1;
}
// FIXME: should be an AF_INET6 socket (once we support it), but the Kernel doesn't care either way.
auto fd = TRY(Core::System::socket(AF_INET, SOCK_DGRAM, IPPROTO_IP));
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_INET6;
AK::TypedTransfer<u8>::copy(((sockaddr_in6&)ifr.ifr_addr).sin6_addr.s6_addr, address.value().to_in6_addr_t(), sizeof(in6_addr));
TRY(Core::System::ioctl(fd, SIOCSIFADDR, &ifr));
}
if (!value_mask.is_empty()) {
auto address = IPv4Address::from_string(value_mask);
if (!address.has_value()) {
warnln("Invalid IPv4 mask: '{}'", value_mask);
return 1;
}
auto fd = TRY(Core::System::socket(AF_INET, SOCK_DGRAM, IPPROTO_IP));
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();
TRY(Core::System::ioctl(fd, SIOCSIFNETMASK, &ifr));
}
}
return 0;
}