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https://github.com/LadybirdBrowser/ladybird.git
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38ce053296
It's not needed in such case, and in the near-future when we would want to use this utility in an initramfs environment where there's no service such as LookupServer being running, it's still useful to have the option to invoke this utility with the mentioned limited output functionality.
329 lines
13 KiB
C++
329 lines
13 KiB
C++
/*
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* Copyright (c) 2021, Brandon Pruitt <brapru@pm.me>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/DeprecatedString.h>
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#include <AK/HashMap.h>
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#include <AK/IPv4Address.h>
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#include <AK/JsonArray.h>
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#include <AK/JsonObject.h>
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#include <AK/QuickSort.h>
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#include <LibCore/ArgsParser.h>
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#include <LibCore/ProcessStatisticsReader.h>
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#include <LibCore/Stream.h>
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#include <LibCore/System.h>
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#include <LibMain/Main.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <unistd.h>
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constexpr int max_formatted_address_length = 21;
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ErrorOr<int> serenity_main(Main::Arguments arguments)
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{
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TRY(Core::System::pledge("stdio rpath unix"));
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bool flag_all = false;
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bool flag_list = false;
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bool flag_tcp = false;
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bool flag_udp = false;
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bool flag_numeric = false;
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bool flag_program = false;
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bool flag_wide = false;
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Core::ArgsParser args_parser;
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args_parser.set_general_help("Display network connections");
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args_parser.add_option(flag_all, "Display both listening and non-listening sockets", "all", 'a');
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args_parser.add_option(flag_list, "Display only listening sockets", "list", 'l');
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args_parser.add_option(flag_tcp, "Display only TCP network connections", "tcp", 't');
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args_parser.add_option(flag_udp, "Display only UDP network connections", "udp", 'u');
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args_parser.add_option(flag_numeric, "Display numerical addresses", "numeric", 'n');
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args_parser.add_option(flag_program, "Show the PID and name of the program to which each socket belongs", "program", 'p');
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args_parser.add_option(flag_wide, "Do not truncate IP addresses by printing out the whole symbolic host", "wide", 'W');
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args_parser.parse(arguments);
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TRY(Core::System::unveil("/sys/kernel/net", "r"));
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TRY(Core::System::unveil("/sys/kernel/processes", "r"));
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TRY(Core::System::unveil("/etc/passwd", "r"));
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TRY(Core::System::unveil("/etc/services", "r"));
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if (!flag_numeric)
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TRY(Core::System::unveil("/tmp/portal/lookup", "rw"));
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TRY(Core::System::unveil(nullptr, nullptr));
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bool has_protocol_flag = (flag_tcp || flag_udp);
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uid_t current_uid = getuid();
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HashMap<pid_t, DeprecatedString> programs;
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if (flag_program) {
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auto processes = TRY(Core::ProcessStatisticsReader::get_all());
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for (auto& proc : processes.processes) {
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programs.set(proc.pid, proc.name);
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}
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}
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enum class Alignment {
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Left,
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Right
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};
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struct Column {
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DeprecatedString title;
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Alignment alignment { Alignment::Left };
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int width { 0 };
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DeprecatedString buffer;
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};
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Vector<Column> columns;
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int protocol_column = -1;
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int bytes_in_column = -1;
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int bytes_out_column = -1;
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int local_address_column = -1;
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int peer_address_column = -1;
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int state_column = -1;
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int program_column = -1;
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auto add_column = [&](auto title, auto alignment, auto width) {
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columns.append({ title, alignment, width, {} });
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return columns.size() - 1;
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};
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protocol_column = add_column("Proto", Alignment::Left, 5);
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bytes_in_column = add_column("Bytes-In", Alignment::Right, 9);
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bytes_out_column = add_column("Bytes-Out", Alignment::Right, 9);
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local_address_column = add_column("Local Address", Alignment::Left, 22);
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peer_address_column = add_column("Peer Address", Alignment::Left, 22);
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state_column = add_column("State", Alignment::Left, 11);
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program_column = flag_program ? add_column("PID/Program", Alignment::Left, 11) : -1;
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auto print_column = [](auto& column, auto& string) {
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if (!column.width) {
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out("{}", string);
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return;
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}
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if (column.alignment == Alignment::Right) {
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out("{:>{1}} "sv, string, column.width);
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} else {
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out("{:<{1}} "sv, string, column.width);
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}
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};
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auto get_formatted_address = [&](DeprecatedString const& address, DeprecatedString const& port) {
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if (flag_wide)
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return DeprecatedString::formatted("{}:{}", address, port);
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if ((address.length() + port.length()) <= max_formatted_address_length)
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return DeprecatedString::formatted("{}:{}", address, port);
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return DeprecatedString::formatted("{}:{}", address.substring_view(0, max_formatted_address_length - port.length()), port);
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};
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auto get_formatted_program = [&](pid_t pid) {
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if (pid == -1)
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return DeprecatedString("-");
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auto program = programs.get(pid);
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return DeprecatedString::formatted("{}/{}", pid, program.value());
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};
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if (!has_protocol_flag || flag_tcp || flag_udp) {
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if (flag_program && current_uid != 0) {
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outln("(Some processes could not be identified, non-owned process info will not be shown)");
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}
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out("Active Internet connections ");
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if (flag_all) {
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outln("(servers and established)");
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} else {
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if (flag_list)
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outln("(only servers)");
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else
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outln("(without servers)");
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}
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for (auto& column : columns)
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print_column(column, column.title);
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outln();
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}
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if (!has_protocol_flag || flag_tcp) {
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auto file = TRY(Core::Stream::File::open("/sys/kernel/net/tcp"sv, Core::Stream::OpenMode::Read));
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auto file_contents = TRY(file->read_until_eof());
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auto json_or_error = JsonValue::from_string(file_contents);
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if (json_or_error.is_error()) {
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warnln("Error: {}", json_or_error.error());
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return 1;
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}
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auto json = json_or_error.release_value();
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Vector<JsonValue> sorted_regions = json.as_array().values();
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quick_sort(sorted_regions, [](auto& a, auto& b) {
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return a.as_object().get_u32("local_port"sv).value_or(0) < b.as_object().get_u32("local_port"sv).value_or(0);
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});
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for (auto& value : sorted_regions) {
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auto& if_object = value.as_object();
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auto bytes_in = if_object.get_deprecated_string("bytes_in"sv).value_or({});
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auto bytes_out = if_object.get_deprecated_string("bytes_out"sv).value_or({});
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auto peer_address = if_object.get_deprecated_string("peer_address"sv).value_or({});
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if (!flag_numeric) {
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auto from_string = IPv4Address::from_string(peer_address);
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auto addr = from_string.value().to_in_addr_t();
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auto* hostent = gethostbyaddr(&addr, sizeof(in_addr), AF_INET);
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if (hostent != nullptr) {
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auto host_name = StringView { hostent->h_name, strlen(hostent->h_name) };
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if (!host_name.is_empty())
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peer_address = host_name;
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}
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}
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auto peer_port = if_object.get_deprecated_string("peer_port"sv).value_or({});
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if (!flag_numeric) {
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auto service = getservbyport(htons(if_object.get_u32("peer_port"sv).value_or(0)), "tcp");
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if (service != nullptr) {
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auto s_name = StringView { service->s_name, strlen(service->s_name) };
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if (!s_name.is_empty())
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peer_port = s_name;
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}
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}
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auto local_address = if_object.get_deprecated_string("local_address"sv).value_or({});
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if (!flag_numeric) {
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auto from_string = IPv4Address::from_string(local_address);
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auto addr = from_string.value().to_in_addr_t();
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auto* hostent = gethostbyaddr(&addr, sizeof(in_addr), AF_INET);
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if (hostent != nullptr) {
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auto host_name = StringView { hostent->h_name, strlen(hostent->h_name) };
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if (!host_name.is_empty())
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local_address = host_name;
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}
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}
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auto local_port = if_object.get_deprecated_string("local_port"sv).value_or({});
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if (!flag_numeric) {
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auto service = getservbyport(htons(if_object.get_u32("local_port"sv).value_or(0)), "tcp");
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if (service != nullptr) {
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auto s_name = StringView { service->s_name, strlen(service->s_name) };
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if (!s_name.is_empty())
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local_port = s_name;
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}
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}
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auto state = if_object.get_deprecated_string("state"sv).value_or({});
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auto origin_pid = (if_object.has("origin_pid"sv)) ? if_object.get_u32("origin_pid"sv).value_or(0) : -1;
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if (!flag_all && ((state == "Listen" && !flag_list) || (state != "Listen" && flag_list)))
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continue;
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if (protocol_column != -1)
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columns[protocol_column].buffer = "tcp";
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if (bytes_in_column != -1)
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columns[bytes_in_column].buffer = bytes_in;
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if (bytes_out_column != -1)
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columns[bytes_out_column].buffer = bytes_out;
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if (local_address_column != -1)
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columns[local_address_column].buffer = get_formatted_address(local_address, local_port);
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if (peer_address_column != -1)
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columns[peer_address_column].buffer = get_formatted_address(peer_address, peer_port);
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if (state_column != -1)
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columns[state_column].buffer = state;
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if (flag_program && program_column != -1)
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columns[program_column].buffer = get_formatted_program(origin_pid);
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for (auto& column : columns)
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print_column(column, column.buffer);
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outln();
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};
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}
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if (!has_protocol_flag || flag_udp) {
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auto file = TRY(Core::Stream::File::open("/sys/kernel/net/udp"sv, Core::Stream::OpenMode::Read));
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auto file_contents = TRY(file->read_until_eof());
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auto json = TRY(JsonValue::from_string(file_contents));
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Vector<JsonValue> sorted_regions = json.as_array().values();
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quick_sort(sorted_regions, [](auto& a, auto& b) {
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return a.as_object().get_u32("local_port"sv).value_or(0) < b.as_object().get_u32("local_port"sv).value_or(0);
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});
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for (auto& value : sorted_regions) {
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auto& if_object = value.as_object();
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auto local_address = if_object.get_deprecated_string("local_address"sv).value_or({});
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if (!flag_numeric) {
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auto from_string = IPv4Address::from_string(local_address);
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auto addr = from_string.value().to_in_addr_t();
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auto* hostent = gethostbyaddr(&addr, sizeof(in_addr), AF_INET);
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if (hostent != nullptr) {
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auto host_name = StringView { hostent->h_name, strlen(hostent->h_name) };
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if (!host_name.is_empty())
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local_address = host_name;
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}
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}
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auto local_port = if_object.get_deprecated_string("local_port"sv).value_or({});
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if (!flag_numeric) {
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auto service = getservbyport(htons(if_object.get_u32("local_port"sv).value_or(0)), "udp");
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if (service != nullptr) {
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auto s_name = StringView { service->s_name, strlen(service->s_name) };
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if (!s_name.is_empty())
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local_port = s_name;
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}
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}
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auto peer_address = if_object.get_deprecated_string("peer_address"sv).value_or({});
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if (!flag_numeric) {
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auto from_string = IPv4Address::from_string(peer_address);
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auto addr = from_string.value().to_in_addr_t();
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auto* hostent = gethostbyaddr(&addr, sizeof(in_addr), AF_INET);
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if (hostent != nullptr) {
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auto host_name = StringView { hostent->h_name, strlen(hostent->h_name) };
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if (!host_name.is_empty())
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peer_address = host_name;
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}
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}
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auto peer_port = if_object.get_deprecated_string("peer_port"sv).value_or({});
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if (!flag_numeric) {
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auto service = getservbyport(htons(if_object.get_u32("peer_port"sv).value_or(0)), "udp");
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if (service != nullptr) {
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auto s_name = StringView { service->s_name, strlen(service->s_name) };
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if (!s_name.is_empty())
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peer_port = s_name;
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}
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}
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auto origin_pid = (if_object.has("origin_pid"sv)) ? if_object.get_u32("origin_pid"sv).value_or(0) : -1;
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if (protocol_column != -1)
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columns[protocol_column].buffer = "udp";
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if (bytes_in_column != -1)
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columns[bytes_in_column].buffer = "-";
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if (bytes_out_column != -1)
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columns[bytes_out_column].buffer = "-";
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if (local_address_column != -1)
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columns[local_address_column].buffer = get_formatted_address(local_address, local_port);
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if (peer_address_column != -1)
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columns[peer_address_column].buffer = get_formatted_address(peer_address, peer_port);
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if (state_column != -1)
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columns[state_column].buffer = "-";
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if (flag_program && program_column != -1)
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columns[program_column].buffer = get_formatted_program(origin_pid);
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for (auto& column : columns)
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print_column(column, column.buffer);
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outln();
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};
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}
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return 0;
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}
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