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/*
* Copyright (c) 2021, Brandon Pruitt <brapru@pm.me>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/HashMap.h>
#include <AK/JsonArray.h>
#include <AK/JsonObject.h>
#include <AK/QuickSort.h>
#include <AK/String.h>
#include <LibCore/ArgsParser.h>
#include <LibCore/File.h>
#include <LibCore/ProcessStatisticsReader.h>
#include <LibCore/System.h>
#include <LibMain/Main.h>
#include <unistd.h>
ErrorOr<int> serenity_main(Main::Arguments arguments)
{
TRY(Core::System::pledge("stdio rpath"));
TRY(Core::System::unveil("/proc/net", "r"));
TRY(Core::System::unveil("/proc/all", "r"));
TRY(Core::System::unveil("/etc/passwd", "r"));
TRY(Core::System::unveil(nullptr, nullptr));
bool flag_all = false;
bool flag_list = false;
bool flag_tcp = false;
bool flag_udp = false;
bool flag_program = false;
Core::ArgsParser args_parser;
args_parser.set_general_help("Display network connections");
args_parser.add_option(flag_all, "Display both listening and non-listening sockets", "all", 'a');
args_parser.add_option(flag_list, "Display only listening sockets", "list", 'l');
args_parser.add_option(flag_tcp, "Display only TCP network connections", "tcp", 't');
args_parser.add_option(flag_udp, "Display only UDP network connections", "udp", 'u');
args_parser.add_option(flag_program, "Show the PID and name of the program to which each socket belongs", "program", 'p');
args_parser.parse(arguments);
bool has_protocol_flag = (flag_tcp || flag_udp);
uid_t current_uid = getuid();
HashMap<pid_t, String> programs;
if (flag_program) {
auto processes = Core::ProcessStatisticsReader::get_all();
if (!processes.has_value())
return 1;
for (auto& proc : processes.value().processes) {
programs.set(proc.pid, proc.name);
}
}
enum class Alignment {
Left,
Right
};
struct Column {
String title;
Alignment alignment { Alignment::Left };
int width { 0 };
String buffer;
};
Vector<Column> columns;
int protocol_column = -1;
int bytes_in_column = -1;
int bytes_out_column = -1;
int local_address_column = -1;
int peer_address_column = -1;
int state_column = -1;
int program_column = -1;
auto add_column = [&](auto title, auto alignment, auto width) {
columns.append({ title, alignment, width, {} });
return columns.size() - 1;
};
protocol_column = add_column("Proto", Alignment::Left, 5);
bytes_in_column = add_column("Bytes-In", Alignment::Right, 9);
bytes_out_column = add_column("Bytes-Out", Alignment::Right, 9);
local_address_column = add_column("Local Address", Alignment::Left, 20);
peer_address_column = add_column("Peer Address", Alignment::Left, 20);
state_column = add_column("State", Alignment::Left, 11);
program_column = flag_program ? add_column("PID/Program", Alignment::Left, 11) : -1;
auto print_column = [](auto& column, auto& string) {
if (!column.width) {
out("{}", string);
return;
}
if (column.alignment == Alignment::Right) {
out("{:>{1}} "sv, string, column.width);
} else {
out("{:<{1}} "sv, string, column.width);
}
};
auto get_formatted_program = [&](pid_t pid) {
if (pid == -1)
return String("-");
auto program = programs.get(pid);
return String::formatted("{}/{}", pid, program.value());
};
if (!has_protocol_flag || flag_tcp || flag_udp) {
if (flag_program && current_uid != 0) {
outln("(Some processes could not be identified, non-owned process info will not be shown)");
}
out("Active Internet connections ");
if (flag_all) {
outln("(servers and established)");
} else {
if (flag_list)
outln("(only servers)");
else
outln("(without servers)");
}
for (auto& column : columns)
print_column(column, column.title);
outln();
}
if (!has_protocol_flag || flag_tcp) {
auto file = Core::File::construct("/proc/net/tcp");
if (!file->open(Core::OpenMode::ReadOnly)) {
warnln("Error: {}", file->error_string());
return 1;
}
auto file_contents = file->read_all();
auto json = JsonValue::from_string(file_contents).release_value_but_fixme_should_propagate_errors();
Vector<JsonValue> sorted_regions = json.as_array().values();
quick_sort(sorted_regions, [](auto& a, auto& b) {
return a.as_object().get("local_port").to_u32() < b.as_object().get("local_port").to_u32();
});
for (auto& value : sorted_regions) {
auto& if_object = value.as_object();
auto bytes_in = if_object.get("bytes_in").to_string();
auto bytes_out = if_object.get("bytes_out").to_string();
auto peer_address = if_object.get("peer_address").to_string();
auto peer_port = if_object.get("peer_port").to_string();
auto formatted_peer_address = String::formatted("{}:{}", peer_address, peer_port);
auto local_address = if_object.get("local_address").to_string();
auto local_port = if_object.get("local_port").to_string();
auto formatted_local_address = String::formatted("{}:{}", local_address, local_port);
auto state = if_object.get("state").to_string();
auto origin_pid = (if_object.has("origin_pid")) ? if_object.get("origin_pid").to_u32() : -1;
if (!flag_all && ((state == "Listen" && !flag_list) || (state != "Listen" && flag_list)))
continue;
if (protocol_column != -1)
columns[protocol_column].buffer = "tcp";
if (bytes_in_column != -1)
columns[bytes_in_column].buffer = bytes_in;
if (bytes_out_column != -1)
columns[bytes_out_column].buffer = bytes_out;
if (local_address_column != -1)
columns[local_address_column].buffer = formatted_local_address;
if (peer_address_column != -1)
columns[peer_address_column].buffer = formatted_peer_address;
if (state_column != -1)
columns[state_column].buffer = state;
if (flag_program && program_column != -1)
columns[program_column].buffer = get_formatted_program(origin_pid);
for (auto& column : columns)
print_column(column, column.buffer);
outln();
};
}
if (!has_protocol_flag || flag_udp) {
auto file = TRY(Core::File::open("/proc/net/udp", Core::OpenMode::ReadOnly));
auto file_contents = file->read_all();
auto json = TRY(JsonValue::from_string(file_contents));
Vector<JsonValue> sorted_regions = json.as_array().values();
quick_sort(sorted_regions, [](auto& a, auto& b) {
return a.as_object().get("local_port").to_u32() < b.as_object().get("local_port").to_u32();
});
for (auto& value : sorted_regions) {
auto& if_object = value.as_object();
auto local_address = if_object.get("local_address").to_string();
auto local_port = if_object.get("local_port").to_string();
auto peer_address = if_object.get("peer_address").to_string();
auto peer_port = if_object.get("peer_port").to_string();
auto origin_pid = (if_object.has("origin_pid")) ? if_object.get("origin_pid").to_u32() : -1;
if (protocol_column != -1)
columns[protocol_column].buffer = "udp";
if (bytes_in_column != -1)
columns[bytes_in_column].buffer = "-";
if (bytes_out_column != -1)
columns[bytes_out_column].buffer = "-";
if (local_address_column != -1)
columns[local_address_column].buffer = String::formatted("{}:{}", local_address, local_port);
if (peer_address_column != -1)
columns[peer_address_column].buffer = String::formatted("{}:{}", peer_address, peer_port);
if (state_column != -1)
columns[state_column].buffer = "-";
if (flag_program && program_column != -1)
columns[program_column].buffer = get_formatted_program(origin_pid);
for (auto& column : columns)
print_column(column, column.buffer);
outln();
};
}
return 0;
}
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