I'm in the process of creating a multicast application but I'm having
difficulty getting the UDPClient to work. The UDPClient works on my local
machine only, not across the network. I've been able to get the multicast
message to work across a network by creating a socket, but I can't get it to
work via UDPClient. What is the difference between the two? Why does the
socket method work and not the UDPClient? Thanks
*****************SOCKET METHOD*********************
Socket s=new Socket(AddressFamily.InterNetwork, SocketType.Dgram,
ProtocolType.Udp);
s.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new
MulticastOption(ip));
s.SetSocketOption(SocketOptionLevel.IP,
SocketOptionName.MulticastTimeToLive, int.Parse(ttl));
IPEndPoint ipep=new IPEndPoint(IPAddress.Parse(mcastGroup),int.Parse(p ort));
s.Connect(ipep);
*********************UDPCLIENT METHOD***********************
udpClient = new UdpClient();
groupEP = new IPEndPoint(groupAddress, groupPort);
int sendBytes = udpClient.Send(data, data.Length, groupEP);
2  7217 
I believe you need to make a call to JoinMulticastGroup on the UdpClient
class. This method allows you to supply the multicast address and the TTL.
HTH
Dan
"chewie" wrote: I'm in the process of creating a multicast application but I'm having
difficulty getting the UDPClient to work. The UDPClient works on my local
machine only, not across the network. I've been able to get the multicast
message to work across a network by creating a socket, but I can't get it to
work via UDPClient. What is the difference between the two? Why does the
socket method work and not the UDPClient? Thanks
*****************SOCKET METHOD*********************
Socket s=new Socket(AddressFamily.InterNetwork, SocketType.Dgram,
ProtocolType.Udp);
s.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new
MulticastOption(ip));
s.SetSocketOption(SocketOptionLevel.IP,
SocketOptionName.MulticastTimeToLive, int.Parse(ttl));
IPEndPoint ipep=new IPEndPoint(IPAddress.Parse(mcastGroup),int.Parse(p ort));
s.Connect(ipep);
*********************UDPCLIENT METHOD***********************
udpClient = new UdpClient();
groupEP = new IPEndPoint(groupAddress, groupPort);
int sendBytes = udpClient.Send(data, data.Length, groupEP);
I believe you need to make a call to JoinMulticastGroup on the UdpClient
class. This method allows you to supply the multicast address and the TTL.
HTH
Dan
"chewie" wrote: I'm in the process of creating a multicast application but I'm having
difficulty getting the UDPClient to work. The UDPClient works on my local
machine only, not across the network. I've been able to get the multicast
message to work across a network by creating a socket, but I can't get it to
work via UDPClient. What is the difference between the two? Why does the
socket method work and not the UDPClient? Thanks
*****************SOCKET METHOD*********************
Socket s=new Socket(AddressFamily.InterNetwork, SocketType.Dgram,
ProtocolType.Udp);
s.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new
MulticastOption(ip));
s.SetSocketOption(SocketOptionLevel.IP,
SocketOptionName.MulticastTimeToLive, int.Parse(ttl));
IPEndPoint ipep=new IPEndPoint(IPAddress.Parse(mcastGroup),int.Parse(p ort));
s.Connect(ipep);
*********************UDPCLIENT METHOD***********************
udpClient = new UdpClient();
groupEP = new IPEndPoint(groupAddress, groupPort);
int sendBytes = udpClient.Send(data, data.Length, groupEP);
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