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Rework master server ping rate-limit logic.

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Pings are now delayed instead of dropped to avoid data loss.
This commit is contained in:
Paul Chote
2018-08-11 13:05:38 +00:00
parent efccd610d3
commit 03adceb656
1 changed files with 32 additions and 26 deletions
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58
OpenRA.Mods.Common/ServerTraits/MasterServerPinger.cs
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@@ -11,9 +11,7 @@
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using BeaconLib;
using OpenRA.Network;
@@ -24,8 +22,12 @@ namespace OpenRA.Mods.Common.Server
{
public class MasterServerPinger : ServerTrait, ITick, INotifyServerStart, INotifySyncLobbyInfo, IStartGame, IEndGame
{
// 3 minutes. Server has a 5 minute TTL for games, so give ourselves a bit of leeway.
const int MasterPingInterval = 60 * 3;
// 3 minutes (in milliseconds). Server has a 5 minute TTL for games, so give ourselves a bit of leeway.
const int MasterPingInterval = 60 * 3 * 1000;
// 1 second (in milliseconds) minimum delay between pings
const int RateLimitInterval = 1000;
static readonly Beacon LanGameBeacon;
static readonly Dictionary<int, string> MasterServerErrors = new Dictionary<int, string>()
{
@@ -34,6 +36,7 @@ namespace OpenRA.Mods.Common.Server
};
long lastPing = 0;
long lastChanged = 0;
bool isInitialPing = true;
volatile bool isBusy;
@@ -53,12 +56,28 @@ namespace OpenRA.Mods.Common.Server
public void Tick(S server)
{
if ((Game.RunTime - lastPing > MasterPingInterval * 1000) || isInitialPing)
PublishGame(server);
else
lock (masterServerMessages)
while (masterServerMessages.Count > 0)
server.SendMessage(masterServerMessages.Dequeue());
// Force an update if the last one was too long ago so the advertisement doesn't time out
if (Game.RunTime - lastChanged > MasterPingInterval)
lastChanged = Game.RunTime;
// Update the master server and LAN clients if something has changed
// Note that isBusy is set while the master server ping is running on a
// background thread, and limits LAN pings as well as master server pings for simplicity.
if (!isBusy && ((lastChanged > lastPing && Game.RunTime - lastPing > RateLimitInterval) || isInitialPing))
{
var gs = new GameServer(server);
if (server.Settings.AdvertiseOnline)
UpdateMasterServer(server, gs.ToPOSTData(false));
if (LanGameBeacon != null)
LanGameBeacon.BeaconData = gs.ToPOSTData(true);
lastPing = Game.RunTime;
}
lock (masterServerMessages)
while (masterServerMessages.Count > 0)
server.SendMessage(masterServerMessages.Dequeue());
}
public void ServerStarted(S server)
@@ -69,12 +88,12 @@ namespace OpenRA.Mods.Common.Server
public void LobbyInfoSynced(S server)
{
PublishGame(server);
lastChanged = Game.RunTime;
}
public void GameStarted(S server)
{
PublishGame(server);
lastChanged = Game.RunTime;
}
public void GameEnded(S server)
@@ -82,24 +101,11 @@ namespace OpenRA.Mods.Common.Server
if (LanGameBeacon != null)
LanGameBeacon.Stop();
PublishGame(server);
}
void PublishGame(S server)
{
// Cache the server info on the main thread to ensure data consistency
var gs = new GameServer(server);
if (!isBusy && server.Settings.AdvertiseOnline)
UpdateMasterServer(server, gs.ToPOSTData(false));
if (LanGameBeacon != null)
LanGameBeacon.BeaconData = gs.ToPOSTData(true);
lastChanged = Game.RunTime;
}
void UpdateMasterServer(S server, string postData)
{
lastPing = Game.RunTime;
isBusy = true;
Action a = () =>