public void AddListeners()
{
// Mark all adapters as not visited.
foreach(var inst in NetworkAdapters.Values)
{
inst.Visited = false;
}
List<IPAddress> IPList = GetValidIPAddresses();
foreach(IPAddress localAddress in IPList)
{
if (NetworkAdapters.ContainsKey(localAddress))
{
NetworkAdapters[localAddress].Visited = true;
}
else
{
EthernetInstance inst = new EthernetInstance();
IPAddress multicastaddress = IPAddress.Parse("239.0.0.222");
int port = 6;
var udpClient = new UdpClient(AddressFamily.InterNetwork);
udpClient.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
try
{
udpClient.Client.Bind(new IPEndPoint(localAddress, port));
}
catch (SocketException e)
{
//
// Bind() can return WSAEADDRNOTAVAIL if we try to bind
// too soon after plugging in a USB NIC. If this
// happens, we just continue and catch this connection
// next time. The cause of this is uncertain. The
// message means "the ip address is invalid", but if
// we just wait a little while, the ip address becomes
// valid.
//
// Easy to repro. Just start this app and plug in a
// USB adapter after it's running.
//
if (e.ErrorCode == 10049) // WSAEADDRNOTAVAIL
{
continue;
}
}
udpClient.JoinMulticastGroup(multicastaddress, localAddress);
udpClient.BeginReceive(OnReceiveSink,
new object[]
{
udpClient, new IPEndPoint(localAddress, ((IPEndPoint) udpClient.Client.LocalEndPoint).Port)
});
inst.Address = localAddress;
inst.Visited = true;
NetworkAdapters.Add(localAddress,inst);
}
}
// Remove un-visited adapters from our collection. Operate on a copy of the collection since we're modifying from within an enumerator
var newCollection = new Dictionary<IPAddress, EthernetInstance>(NetworkAdapters);
foreach(var inst in NetworkAdapters.Values)
{
if (inst.Visited == false)
{
newCollection.Remove(inst.Address);
}
}
NetworkAdapters = newCollection;
}
public void AddListeners()
{
// Mark all adapters as not visited.
foreach (var inst in NetworkAdapters.Values)
{
inst.Visited = false;
}
List <IPAddress> IPList = GetValidIPAddresses();
foreach (IPAddress localAddress in IPList)
{
if (NetworkAdapters.ContainsKey(localAddress))
{
NetworkAdapters[localAddress].Visited = true;
}
else
{
EthernetInstance inst = new EthernetInstance();
IPAddress multicastaddress = IPAddress.Parse("239.0.0.222");
int port = 6;
var udpClient = new UdpClient(AddressFamily.InterNetwork);
udpClient.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
try
{
udpClient.Client.Bind(new IPEndPoint(localAddress, port));
}
catch (SocketException e)
{
//
// Bind() can return WSAEADDRNOTAVAIL if we try to bind
// too soon after plugging in a USB NIC. If this
// happens, we just continue and catch this connection
// next time. The cause of this is uncertain. The
// message means "the ip address is invalid", but if
// we just wait a little while, the ip address becomes
// valid.
//
// Easy to repro. Just start this app and plug in a
// USB adapter after it's running.
//
if (e.ErrorCode == 10049) // WSAEADDRNOTAVAIL
{
continue;
}
}
udpClient.JoinMulticastGroup(multicastaddress, localAddress);
udpClient.BeginReceive(OnReceiveSink,
new object[]
{
udpClient, new IPEndPoint(localAddress, ((IPEndPoint)udpClient.Client.LocalEndPoint).Port)
});
inst.Address = localAddress;
inst.Visited = true;
NetworkAdapters.Add(localAddress, inst);
}
}
// Remove un-visited adapters from our collection. Operate on a copy of the collection since we're modifying from within an enumerator
var newCollection = new Dictionary <IPAddress, EthernetInstance>(NetworkAdapters);
foreach (var inst in NetworkAdapters.Values)
{
if (inst.Visited == false)
{
newCollection.Remove(inst.Address);
}
}
NetworkAdapters = newCollection;
}
