Re: NIST time server - TCPIP problem

Hi Scott,

Thank you for the prompt reply.  I checked the Dynamic C TCP/IP manual, 
which says the MAX_SOCKETS define has been deprecated.  I did not have a 
value defined for MAX_TCP_SOCKET_BUFFERS, so was hoping you had nailed 
the problem.  Since the default value is 4, I added the line:
    #define MAX_TCP_SOCKET_BUFFERS 8
and when that did not work, made it 16.  That did not work either.

The code which is failing is:

     printf("\nConnecting with NIST server ...\n");
     sock_init();
     while (ifpending(IF_DEFAULT) == IF_COMING_UP)
     {
         tcp_tick(NULL);
     }
     ip=resolve(NIST_SERVER_IP);
     tcp_open(&s, 0, ip, NIST_PORT, NULL);
     sock_wait_established(&s, NIST_TIMEOUT, NULL, &status);
     sock_mode(&s, TCP_MODE_ASCII);
     // Receive and process data -- the server will close the connection,
     // which will cause execution to continue at sock_err below.
     while (tcp_tick(&s))
     {
         sock_wait_input(&s, NIST_TIMEOUT, NULL, &status);
         sock_gets(&s, buffer, 48);
     }

     sock_err:
     if (status == -1)
     {
         printf("\nConnection timed out, exiting.\n");
         exit(1);
     }

I get the "Connection timed out, exiting" message almost instantly, 
which means the sock_wait_input function is returning a status of -1, 
which according to the DC manual "indicates a reset or abort." This same 
code works if I haven't opened the http handler first.

Scott, I know absolutely nothing about TCP/IP stuff, and am really 
struggling here.  I am embarrassed to admit that I have already spent a 
couple of days on this issue.  Do you have any other ideas?

Thanks so much,

Roger


On 6/26/2014 2:07 PM, Scott Henion [email protected] [rabbit-semi] 
wrote:
>
> Look at the #defines in the docs for the # of socket buffers and max
> sockets. You probably have 1 too few.
>
> ------------------------------------------
> Scott G. Henion, Consultant
> Web site: http://SHDesigns.org
> ------------------------------------------
>



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