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Sending multicasts out of Sockets without setting the broadcast to true - causes the error "Bad value for ai_flags" on some systems (#3404)

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The underlying cause looks to be https://github.com/dotnet/runtime/issues/28630.

Basically, it's an access denied bug.
It looks like multicasts need the same access rights as broadcasts on some systems.
This commit is contained in:
BaronGreenback 2020-06-24 17:23:16 +01:00
parent c07d8abfd5
commit f01baad05e
3 changed files with 4 additions and 5 deletions
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2
Emby.Server.Implementations/Net/SocketFactory.cs
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@ -4,7 +4,6 @@ using System;
using System.Net;
using System.Net.Sockets;
using MediaBrowser.Model.Net;
using Microsoft.Extensions.Logging;
namespace Emby.Server.Implementations.Net
{
@ -123,6 +122,7 @@ namespace Emby.Server.Implementations.Net
retVal.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(IPAddress.Parse(ipAddress), localIp));
retVal.MulticastLoopback = true;
return new UdpSocket(retVal, localPort, localIp);
}
catch

2
MediaBrowser.Model/Net/ISocketFactory.cs
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@ -1,7 +1,6 @@
#pragma warning disable CS1591
using System.Net;
using Microsoft.Extensions.Logging;
namespace MediaBrowser.Model.Net
{
@ -25,6 +24,5 @@ namespace MediaBrowser.Model.Net
/// <param name="localPort">The local port to bind to.</param>
/// <returns>A <see cref="ISocket"/> implementation.</returns>
ISocket CreateUdpMulticastSocket(string ipAddress, int multicastTimeToLive, int localPort);
}
}

5
RSSDP/SsdpCommunicationsServer.cs
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@ -338,7 +338,8 @@ namespace Rssdp.Infrastructure
private ISocket ListenForBroadcastsAsync()
{
var socket = _SocketFactory.CreateUdpMulticastSocket(SsdpConstants.MulticastLocalAdminAddress, _MulticastTtl, SsdpConstants.MulticastPort);
var socket = _SocketFactory.CreateUdpMulticastSocket(SsdpConstants.MulticastLocalAdminAddress, _MulticastTtl, SsdpConstants.MulticastPort);
_ = ListenToSocketInternal(socket);
return socket;
@ -382,7 +383,7 @@ namespace Rssdp.Infrastructure
private async Task ListenToSocketInternal(ISocket socket)
{
var cancelled = false;
var receiveBuffer = new byte[8192];
var receiveBuffer = new byte[8192];
while (!cancelled && !IsDisposed)
{