Re: [lwip-devel] connect block for ever?? (i need a workaround)

[Piero 74]

using lwip on a board with microcontroller and trying a connection to a server in a host NOT CONNECTED on the network

TCP_MAXSYNRTX  set with default (6)

this is my simple code:

  sd = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);

  if (sd >= 0)

  {

    // valid socket

    addr.sin_family = AF_INET;

    IP4_ADDR(&ip, 10, 51, 15, 34);

    addr.sin_addr.s_addr = ip.addr;

    addr.sin_port = htons(5555);

    connect(sd, &addr, sizeof(addr) );                  // remote connect (1)

  }

  while(1)

  {

    pippo++;                                                    // (2)

    vTaskDelay(UDP_WAITNETWORK);

  }

using breakpoints (but i will have a more accurate measurement)

15-18 seconds

2008/10/2 bill <address@hidden>

My empirical data on WinXP timing out a connection is between 5 and 6
minutes.

> -----Original Message-----
> From: lwip-devel-bounces+bauerbach=arrayonline.com@nongnu.org
> [mailto:lwip-devel-bounces+bauerbach=arrayonline.com@nongnu.org] On
> Behalf Of Kieran Mansley
> Sent: Thursday, October 02, 2008 8:38 AM
> To: lwip-devel
> Subject: Re: [lwip-devel] connect block for ever?? (i need a
> workaround)
>
> On Thu, 2008-10-02 at 14:26 +0200, Piero 74 wrote:
> >
> > HOURS??? my understanding is that SYN packet will be send
> >  TCP_MAXSYNRTX times,
> > using a not simple timeout schema... but i hope that this timeout
> > could be of the order of seconds
> > and the function netconn_connect returns after this error  (i have to
> > d some test) :O|
>
> The timeout between SYN retransmissions starts off as a few seconds,
> but
> it is increased exponentially each time the packet is retransmitted.
> Exponential increases very quickly get large.  I've not worked out the
> total time myself, but should be a relatively easy sum to do.
>
> Kieran
>
>
>
> _______________________________________________
> lwip-devel mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/lwip-devel



_______________________________________________
lwip-devel mailing list
address@hidden
http://lists.nongnu.org/mailman/listinfo/lwip-devel