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/* network-view.vala
*
* Copyright (C) 2023–2025 Markus Göllnitz
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Authors: Markus Göllnitz <camelcasenick@bewares.it>
*/
namespace Vnstat {
public enum Mode {
HOURLY = 'h',
DAILY = 'd',
MONTHLY = 'm',
TOP = 't',
}
public bool test_exists () {
bool exists = false;
string vnstat_stdout;
string vnstat_stderr;
int vnstat_status;
try {
GLib.Process.spawn_command_line_sync ("vnstat --json",
out vnstat_stdout,
out vnstat_stderr,
out vnstat_status);
Json.Object? vnstat_json = Json.from_string (vnstat_stdout)?.get_object ();
exists = vnstat_json?.get_string_member ("jsonversion") == "2";
} catch (SpawnError error) {
info ("Error connecting to vnstat: %s\n", error.message);
} catch (Json.ParserError error) {
info ("Error parsing vnstat's result: %s\n", error.message);
} catch (Error error) {
info ("Error with vnstat: %s\n", error.message);
}
return exists;
}
public Interface[] list_interfaces () {
Interface[] interfaces = {};
string vnstat_stdout;
string vnstat_stderr;
int vnstat_status;
try {
GLib.Process.spawn_command_line_sync ("vnstat --json",
out vnstat_stdout,
out vnstat_stderr,
out vnstat_status);
Json.Object? vnstat_json = Json.from_string (vnstat_stdout)?.get_object ();
List<weak Json.Node>? interface_list = vnstat_json?.get_array_member ("interfaces")?.get_elements ();
if (interface_list != null) {
foreach (Json.Node interface_element in (!) interface_list) {
Json.Object interface_json = (!) interface_element.get_object ();
string interface_name = interface_json.get_string_member_with_default ("name", "");
interfaces += new Interface (interface_name);
}
}
} catch (SpawnError error) {
info ("Error connecting to vnstat: %s\n", error.message);
} catch (Json.ParserError error) {
info ("Error parsing vnstat's result: %s\n", error.message);
} catch (Error error) {
info ("Error with vnstat: %s\n", error.message);
}
return interfaces;
}
public struct TrafficDataPoint {
public int64 timestamp;
public double download;
public double upload;
}
public class Interface {
public string name { get; private set; }
public bool recently_used { get; private set; }
public Interface (string name) {
this.name = name;
}
public List<TrafficDataPoint?> get_traffic (Vnstat.Mode mode) {
List<TrafficDataPoint?> traffic = new List<TrafficDataPoint?> ();
string vnstat_stdout;
string vnstat_stderr;
int vnstat_status;
try {
GLib.Process.spawn_command_line_sync (@"vnstat --json $mode -i $name",
out vnstat_stdout,
out vnstat_stderr,
out vnstat_status);
if (vnstat_status == 0) {
Json.Object? vnstat_json = Json.from_string (vnstat_stdout)?.get_object ();
List<weak Json.Node>? interface_list = vnstat_json?.get_array_member ("interfaces")?.get_elements ();
if (interface_list != null) {
foreach (Json.Node interface_element in (!) interface_list) {
Json.Object? interface_json = interface_element.get_object ();
string member_name = "";
switch (mode) {
case Mode.HOURLY:
member_name = "hour";
break;
case Mode.DAILY:
member_name = "day";
break;
case Mode.MONTHLY:
member_name = "month";
break;
case Mode.TOP:
member_name = "top";
break;
}
Json.Array? traffic_json = interface_json?.get_object_member ("traffic")?.get_array_member (member_name);
traffic_json?.foreach_element ((data_point_array, data_point_index, data_point_element) => {
Json.Object data_point_json = (!) data_point_element.get_object ();
traffic.append (TrafficDataPoint () {
timestamp = data_point_json.get_int_member ("timestamp"),
download = data_point_json.get_int_member ("rx"),
upload = data_point_json.get_int_member ("tx"),
});
});
this.recently_used = traffic_json?.get_length () != 0;
}
}
}
} catch (SpawnError error) {
info ("Error connecting to vnstat: %s\n", error.message);
} catch (Json.ParserError error) {
info ("Error parsing vnstat's result: %s\n", error.message);
} catch (Error error) {
info ("Error with vnstat: %s\n", error.message);
}
return (owned) traffic;
}
}
}
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