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UDP Multicast Network Interface selection support #332

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UDP Multicast Network Interface selection support #332

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83 changes: 76 additions & 7 deletions source/NetCoreServer/UdpClient.cs
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
using System;
using System.Net;
using System.Net.NetworkInformation;
using System.Net.Sockets;
using System.Text;

Expand Down Expand Up @@ -330,35 +331,70 @@ public virtual void SetupMulticast(bool enable)
}

/// <summary>
/// Join multicast group with a given IP address (synchronous)
/// Join multicast group with a given IP address and network interface index (synchronous)
/// </summary>
/// <param name="address">IP address</param>
public virtual void JoinMulticastGroup(IPAddress address)
/// <param name="interfaceIndex">Network interface index</param>
public virtual void JoinMulticastGroup(IPAddress address, int interfaceIndex)
{
if (Endpoint.AddressFamily == AddressFamily.InterNetworkV6)
Socket.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.AddMembership, new IPv6MulticastOption(address));
Socket.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.AddMembership, new IPv6MulticastOption(address, interfaceIndex));
else
Socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(address));
Socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(address, interfaceIndex));

// Call the client joined multicast group notification
OnJoinedMulticastGroup(address);
}
/// <summary>
/// Join multicast group with a given IP address and network interface index (synchronous)
/// </summary>
/// <param name="address">IP address</param>
/// <param name="interfaceIndex">Network interface index</param>
public virtual void JoinMulticastGroup(string address, int interfaceIndex) { JoinMulticastGroup(IPAddress.Parse(address), interfaceIndex); }
/// <summary>
/// Join multicast group with a given IP address (synchronous)
/// </summary>
/// <param name="address">IP address</param>
public virtual void JoinMulticastGroup(IPAddress address) { JoinMulticastGroup(address, 0); }
/// <summary>
/// Join multicast group with a given IP address (synchronous)
/// </summary>
/// <param name="address">IP address</param>
public virtual void JoinMulticastGroup(string address) { JoinMulticastGroup(IPAddress.Parse(address)); }

/// <summary>
/// Join multicast group with a given IP address and network interface (synchronous)
/// </summary>
/// <param name="address">IP address</param>
/// <param name="networkInterface">Network interface</param>
public virtual void JoinMulticastGroup(IPAddress address, NetworkInterface networkInterface)
{
if (Endpoint.AddressFamily == AddressFamily.InterNetworkV6)
Socket.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.AddMembership, new IPv6MulticastOption(address, networkInterface.GetIPProperties().GetIPv6Properties().Index));
else
Socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(address, networkInterface.GetIPProperties().GetIPv4Properties().Index));

// Call the client joined multicast group notification
OnJoinedMulticastGroup(address);
}
/// <summary>
/// Join multicast group with a given IP address and network interface (synchronous)
/// </summary>
/// <param name="address">IP address</param>
/// <param name="networkInterface">Network interface</param>
public virtual void JoinMulticastGroup(string address, NetworkInterface networkInterface) { JoinMulticastGroup(IPAddress.Parse(address), networkInterface); }

/// <summary>
/// Leave multicast group with a given IP address (synchronous)
/// </summary>
/// <param name="address">IP address</param>
public virtual void LeaveMulticastGroup(IPAddress address)
/// <param name="interfaceIndex">Network interface index</param>
public virtual void LeaveMulticastGroup(IPAddress address, int interfaceIndex)
{
if (Endpoint.AddressFamily == AddressFamily.InterNetworkV6)
Socket.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.DropMembership, new IPv6MulticastOption(address));
Socket.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.DropMembership, new IPv6MulticastOption(address, interfaceIndex));
else
Socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.DropMembership, new MulticastOption(address));
Socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.DropMembership, new MulticastOption(address, interfaceIndex));

// Call the client left multicast group notification
OnLeftMulticastGroup(address);
Expand All @@ -367,8 +403,41 @@ public virtual void LeaveMulticastGroup(IPAddress address)
/// Leave multicast group with a given IP address (synchronous)
/// </summary>
/// <param name="address">IP address</param>
/// <param name="interfaceIndex">Network interface index</param>
public virtual void LeaveMulticastGroup(string address, int interfaceIndex) { LeaveMulticastGroup(IPAddress.Parse(address), interfaceIndex); }
/// <summary>
/// Leave multicast group with a given IP address (synchronous)
/// </summary>
/// <param name="address">IP address</param>
public virtual void LeaveMulticastGroup(IPAddress address) { LeaveMulticastGroup(address, 0); }
/// <summary>
/// Leave multicast group with a given IP address (synchronous)
/// </summary>
/// <param name="address">IP address</param>
public virtual void LeaveMulticastGroup(string address) { LeaveMulticastGroup(IPAddress.Parse(address)); }

/// <summary>
/// Leave multicast group with a given IP address and network interface (synchronous)
/// </summary>
/// <param name="address">IP address</param>
/// <param name="networkInterface">Network interface</param>
public virtual void LeaveMulticastGroup(IPAddress address, NetworkInterface networkInterface)
{
if (Endpoint.AddressFamily == AddressFamily.InterNetworkV6)
Socket.SetSocketOption(SocketOptionLevel.IPv6, SocketOptionName.DropMembership, new IPv6MulticastOption(address, networkInterface.GetIPProperties().GetIPv6Properties().Index));
else
Socket.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.DropMembership, new MulticastOption(address, networkInterface.GetIPProperties().GetIPv4Properties().Index));

// Call the client left multicast group notification
OnLeftMulticastGroup(address);
}
/// <summary>
/// Leave multicast group with a given IP address and network interface (synchronous)
/// </summary>
/// <param name="address">IP address</param>
/// <param name="networkInterface">Network interface</param>
public virtual void LeaveMulticastGroup(string address, NetworkInterface networkInterface) { LeaveMulticastGroup(IPAddress.Parse(address), networkInterface); }

#endregion

#region Send/Receive data
Expand Down