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Limit SourceServerQuery to one concurrent request per endpoint
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@ -15,12 +15,39 @@ internal static class SourceServerQuery
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// private static readonly byte A2S_PLAYER = 0x55;
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// private static readonly byte A2S_PLAYER = 0x55;
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private static readonly byte A2S_RULES = 0x56;
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private static readonly byte A2S_RULES = 0x56;
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internal static async Task<Dictionary<string, string>> GetRules( ServerInfo server )
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private static readonly Dictionary<IPEndPoint, Task<Dictionary<string, string>>> PendingQueries =
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{
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new Dictionary<IPEndPoint, Task<Dictionary<string, string>>>();
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try
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internal static Task<Dictionary<string, string>> GetRules( ServerInfo server )
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{
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{
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var endpoint = new IPEndPoint(server.Address, server.QueryPort);
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var endpoint = new IPEndPoint(server.Address, server.QueryPort);
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lock (PendingQueries)
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{
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if (PendingQueries.TryGetValue(endpoint, out var pending))
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return pending;
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var task = GetRulesImpl(endpoint, server)
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.ContinueWith(t =>
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{
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lock (PendingQueries)
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{
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PendingQueries.Remove(endpoint);
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}
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return t;
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})
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.Unwrap();
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PendingQueries.Add(endpoint, task);
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return task;
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}
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}
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private static async Task<Dictionary<string, string>> GetRulesImpl( IPEndPoint endpoint, ServerInfo server )
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{
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try
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{
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using (var client = new UdpClient())
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using (var client = new UdpClient())
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{
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{
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client.Client.SendTimeout = 3000;
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client.Client.SendTimeout = 3000;
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