Just as a side point, topics such as these which deal with application
issues as opposed to building io-pkt from the repository really belong
in the "general" networking forum rather than here.  We can keep this
one here, but this group is intended for discussions related
specifically to building code from the repository.

	Thanks!
		Robert.


-----Original Message-----
From: Eric Dong [mailto:eric.dongxx@gmail.com] 
Sent: Thursday, July 03, 2008 10:52 AM
To: builds-networking
Subject: Re: RE: recvfrom() could not return back even with TimerTimeout

thx, i added your snippet, but when no pkts received, recvfrom() still
blocks and the timertimeout still does not make any effects.

now i came across another problem, as in my previous post, i have server
and client thread, now when i just started the client thread(only
sending out packets) , the machine on the other side could receive it.
but when i started the server thread, then both two threads gave me the
error during execution:
    sendto: Bad file descriptor
    recvfrom: Bad file descriptor

and if i just only started the server thread, still the same error.
seems sth wrong with the server thread. but the server and client
threads on two machines are the same. so what might cause the above
errors? thank u.

Eric

_______________________________________________
Builds
http://community.qnx.com/sf/go/post10024

On Thu, Jul 03, 2008 at 10:51:39AM -0400, Eric Dong wrote:
> thx, i added your snippet, but when no pkts received, recvfrom() still blocks and the timertimeout still does not make
 any effects.

The following works for me.

#include <sys/neutrino.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <err.h>
#include <stdio.h>

int
main(void)
{
        int             s;
        uint64_t        timeo;
        struct sockaddr sin;
        socklen_t       slen;
        char            c;

        if ((s = socket(AF_INET, SOCK_RAW, 0)) == -1)
                err(1, "socket");

        timeo = 1 * 1000000000;
        TimerTimeout(CLOCK_REALTIME, _NTO_TIMEOUT_SEND | _NTO_TIMEOUT_REPLY,
            NULL, &timeo, NULL);
        slen = sizeof(sin);
        if (recvfrom(s, &c, 1, 0, (struct sockaddr *)&sin, &slen) == -1)
                err(1, "recvfrom");
        return 0;
}


> 
> now i came across another problem, as in my previous post, i have server and client thread, now when i just started 
the client thread(only sending out packets) , the machine on the other side could receive it. but when i started the 
server thread, then both two threads gave me the error during execution:
>     sendto: Bad file descriptor
>     recvfrom: Bad file descriptor
> 
> and if i just only started the server thread, still the same error. seems sth wrong with the server thread. but the 
server and client threads on two machines are the same. so what might cause the above errors? thank u.

Is io-pkt still running?