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Added feature EADDRINUSE: address already in use #280

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Added feature EADDRINUSE: address already in use #280

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dedb75c
Update WebSocketServer.cs
Nov 11, 2019
6c9dd03
Merge remote-tracking branch 'upstream/master'
Aug 15, 2020
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55 changes: 38 additions & 17 deletions src/Fleck/WebSocketServer.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,8 @@
using System.Runtime.InteropServices;
using System.Security.Authentication;
using Fleck.Helpers;
using System.Net.NetworkInformation;
using System.Linq;

namespace Fleck
{
Expand Down Expand Up @@ -80,29 +82,48 @@ private IPAddress ParseIPAddress(Uri uri)

public void Start(Action<IWebSocketConnection> config)
{
var ipLocal = new IPEndPoint(_locationIP, Port);
ListenerSocket.Bind(ipLocal);
ListenerSocket.Listen(100);
Port = ((IPEndPoint)ListenerSocket.LocalEndPoint).Port;
FleckLog.Info(string.Format("Server started at {0} (actual port {1})", Location, Port));
if (_scheme == "wss")
if (CheckIfPortAvailable(Port))
{
if (Certificate == null)
var ipLocal = new IPEndPoint(_locationIP, Port);
ListenerSocket.Bind(ipLocal);
ListenerSocket.Listen(100);
Port = ((IPEndPoint)ListenerSocket.LocalEndPoint).Port;
FleckLog.Info(string.Format("Server started at {0} (actual port {1})", Location, Port));
if (_scheme == "wss")
{
FleckLog.Error("Scheme cannot be 'wss' without a Certificate");
return;
}
if (Certificate == null)
{
FleckLog.Error("Scheme cannot be 'wss' without a Certificate");
return;
}

if (EnabledSslProtocols == SslProtocols.None)
{
EnabledSslProtocols = SslProtocols.Tls;
FleckLog.Debug("Using default TLS 1.0 security protocol.");
if (EnabledSslProtocols == SslProtocols.None)
{
EnabledSslProtocols = SslProtocols.Tls;
FleckLog.Debug("Using default TLS 1.0 security protocol.");
}
}
ListenForClients();
_config = config;
}
ListenForClients();
_config = config;
}
else
{

FleckLog.Error(string.Format("Server cannot start port {0}, port already in use", Port));
throw new Exception("Error: listen EADDRINUSE: address already in use :::" + Port);
}
}
public bool CheckIfPortAvailable(int port)
{
IPGlobalProperties properties = IPGlobalProperties.GetIPGlobalProperties();
IPEndPoint[] end_point = properties.GetActiveTcpListeners();
var ports = end_point.Select(p => p.Port).ToList<int>();
if (!ports.Contains(port))
{
return true;
}
return false;
}
private void ListenForClients()
{
ListenerSocket.Accept(OnClientConnect, e => {
Expand Down