Re: Returned mail: delivery problems encountered

Re: Returned mail: delivery problems encountered

[Edward Parrilla]

> 
> Hi all,
> I have the following:
> #define STDIN 0
> /* .......*/
>  
> int nfds;
> struct timeval tv;
> fd_set rfds;
> fd_set afds;
> FD_ZERO(&afds);
> tv.tv_sec=0;
> tv.tv_usec=0
> FD_SET(STDIN, &afds);
> FD_SET(msock, &afds);
> nfds=getdtablesize();
> msock=passiveTCP(service, 5); <--listening socket
> while(1)
> {
>    memcpy(&rfds,&afds, sizeof(rfds));
>    if (select(nfds, &rfds, (fd_set *)0, (fd_set *)0, &tv)<0)
>          errexit (" error ");
>   if (FD_ISSET(STDIN,&rfds)
>      handle(stdin);
>  
>  
> /*  it is not making to this line */  <-- here is the prolem, it does
> not make to the next line, it does work to the line before(i.e. takes
> input from STDIN), but it doesn't take something coming to the socket.
>  
> if (FD_ISSET(msock, &rfds))
>    {
>       handle _incoming _request()
>   }
>  
> }
>  
> Any idea why it couldn't be taking the incoming calls for the socket. 
> Thanks in advance
> Ed

Re: Returned mail: delivery problems encountered

[Glynn Clements]

Edward Parrilla wrote:

> > I have the following:

> > FD_SET(msock, &afds);
> > nfds=getdtablesize();
> > msock=passiveTCP(service, 5); <--listening socket

You should initialise msock *before* you use it.

-- 
Glynn Clements <glynn@gclements.plus.com>

Re: Returned mail: delivery problems encountered

[Jan-Benedict Glaw]

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On Wed, 2004-10-27 22:34:05 -0500, Edward Parrilla <eparrilla@comcast.net>
wrote in message <1098934436.6437.7.camel@localhost.localdomain>:
> > I have the following:
> > #define STDIN 0

Use STDIN_FILENO (unistd.h) instead of this hack.

> > /* .......*/
> >  
> > int nfds;
> > struct timeval tv;
> > fd_set rfds;
> > fd_set afds;
> > FD_ZERO(&afds);
> > tv.tv_sec=0;
> > tv.tv_usec=0
> > FD_SET(STDIN, &afds);
> > FD_SET(msock, &afds);
> > nfds=getdtablesize();
> > msock=passiveTCP(service, 5); <--listening socket
> > while(1)
> > {
> >    memcpy(&rfds,&afds, sizeof(rfds));
> >    if (select(nfds, &rfds, (fd_set *)0, (fd_set *)0, &tv)<0)
> >          errexit (" error ");
> >   if (FD_ISSET(STDIN,&rfds)
> >      handle(stdin);
> >  
> >  
> > /*  it is not making to this line */  <-- here is the prolem, it does
> > not make to the next line, it does work to the line before(i.e. takes
> > input from STDIN), but it doesn't take something coming to the socket.

Glynn already pointed out that you FD_SET(msock) before you assign it.
Additionally, you're calling select() inside a loop. You actually need
to initialize tv.tv_sec, tv.tv_usec and afds _each time_ before calling
select(). So move that into the loop:-)

> > if (FD_ISSET(msock, &rfds))
> >    {
> >       handle _incoming _request()
> >   }
> >  
> > }

MfG, JBG

-- 
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