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(AddressF amily.InterNetw ork, SocketType.Dgra m,
ProtocolType.Ud p);
s.SetSocketOpti on(SocketOption Level.IP, SocketOptionNam e.AddMembership , new
MulticastOption (ip));
s.SetSocketOpti on(SocketOption Level.IP,
SocketOptionNam e.MulticastTime ToLive, int.Parse(ttl)) ;
IPEndPoint ipep=new IPEndPoint(IPAd dress.Parse(mca stGroup),int.Pa rse(port));
s.Connect(ipep) ;
*************** ******UDPCLIENT METHOD********* **************
udpClient = new UdpClient();
groupEP = new IPEndPoint(grou pAddress, groupPort);
int sendBytes = udpClient.Send( data, data.Length, groupEP);
2  7300 
I believe you need to make a call to JoinMulticastGr oup 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(AddressF amily.InterNetw ork, SocketType.Dgra m,
ProtocolType.Ud p);
s.SetSocketOpti on(SocketOption Level.IP, SocketOptionNam e.AddMembership , new
MulticastOption (ip));
s.SetSocketOpti on(SocketOption Level.IP,
SocketOptionNam e.MulticastTime ToLive, int.Parse(ttl)) ;
IPEndPoint ipep=new IPEndPoint(IPAd dress.Parse(mca stGroup),int.Pa rse(port));
s.Connect(ipep) ;
*************** ******UDPCLIENT METHOD********* **************
udpClient = new UdpClient();
groupEP = new IPEndPoint(grou pAddress, groupPort);
int sendBytes = udpClient.Send( data, data.Length, groupEP);
I believe you need to make a call to JoinMulticastGr oup 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(AddressF amily.InterNetw ork, SocketType.Dgra m,
ProtocolType.Ud p);
s.SetSocketOpti on(SocketOption Level.IP, SocketOptionNam e.AddMembership , new
MulticastOption (ip));
s.SetSocketOpti on(SocketOption Level.IP,
SocketOptionNam e.MulticastTime ToLive, int.Parse(ttl)) ;
IPEndPoint ipep=new IPEndPoint(IPAd dress.Parse(mca stGroup),int.Pa rse(port));
s.Connect(ipep) ;
*************** ******UDPCLIENT METHOD********* **************
udpClient = new UdpClient();
groupEP = new IPEndPoint(grou pAddress, groupPort);
int sendBytes = udpClient.Send( data, data.Length, groupEP);
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