Re: Port Unreachable

Hi Steve,

Thanks for the reply. 

Yes I am sure I am using UDP. I took the syntax directly from one of the UDP sample programs. It works nicely until the PC which is sending the data screws up and I guess leaves the socket hanging. At this point the only way to reestablish communication is to open and close the socket on the Rabbit. I am trying to make it more robust by sensing this fault condition but I can't find anything on the Rabbit end that detects this fault condition

Regards
  

--- In [email protected], Steve Trigero <seecwriter@...> wrote:
>
> I'm confused. There is no "connection" with UDP. Are you sure you're using UDP?
> I use the following to open a UDP socket:
>  
>  udp_extopen( &udpcon[i].socket, IF_DEFAULT, UDP_BROADCAST_PORT, -1, -1, NULL, 0, 0); 
>  
>  
> Also, make sure you are not using the same port number for both TCP and UDP.
>  
> Steve
>  
>  
> 
> 
> 
> On Wednesday, October 16, 2013 7:55 AM, ct3lions2000 <terencenixon@...> wrote:
>   
>   
> >Hi Guys
> >
> >I have a simple UDP communications set up where I open up a UDP Port on the RCM6710 using:
> >
> >udp_open(&sock, LOCAL_PORT, REMOTE_IP,0, NULL)
> >
> >I specify an IP Address and port to listen too. I then call TCP_TICK regularly and it works great communicating with a Visual Basic programming running on my PC.  The problem comes when I halt the VB program and restart it. When I restart the VB program and try to send data to the Rabbit I get no reply from the rabbit (rabbit never receives the packet) and using a packet sniffer I see that I get an error packet saying the "Port is unreachable". The only way to correct this is to close the and reopen the socket on the rabbit. 
> >
> >I have checked the return values on TCP_TICK and ifstatus and they are both nonzero indicating that as far as the rabbit is concerned the connection is still good.
> >
> >Is there a way I can check on the rabbit that everything is OK and reset it if it is not?
> >
> >Thanks
> >
> >  
> > 
> >
> >
>