From: NGUYEN Thanh SILICOMP <thanh2.nguyen@orange-ftgroup.com>
To: ecos-discuss@ecos.sourceware.org
Subject: Re: [ECOS] Application is blocked on the while loop withinbsd_connect() function
Date: Fri, 04 Jan 2008 10:09:00 -0000 [thread overview]
Message-ID: <477E05BC.5080804@orange-ftgroup.com> (raw)
In-Reply-To: <20080103114947.GH4550@lunn.ch>
Hi,
Yes, for solving the issue, i had to make a non blocking socket for
ftpclient. Instead of using fcntl() with F_GETFL or F_SETFL that is not
supported at this moment in Ecos, I used ioctl with FIONBIO. My
application seems working good now.
Once more time, thanks for your helps.
NT
Andrew Lunn a écrit :
> On Wed, Jan 02, 2008 at 11:57:34AM +0100, NGUYEN Thanh SILICOMP wrote:
>
>> Hi all,
>>
>> Firstly, happy new year & best wished to all.
>>
>> I'm working on an application connecting to FTP server using ecos ftpclient
>> package. I constate that the application waits for ever on a blocking
>> semaphore of cyg_tsleep() function when there is no ftp server available.
>>
>> In fact, for connecting to ftp server, ftpclient uses connect() that calls
>> itself bas_connect() in which the while loop is used for waiting for the
>> connection etablishment or an error occurring :
>>
>> while ((so->so_state & SS_ISCONNECTING) && so->so_error == 0) {
>> error = tsleep((caddr_t)&so->so_timeo, PSOCK | PCATCH,
>> netcon, 0);
>>
>> if (error)
>> break;
>>
>> }
>>
>> The paramter timo of tsleep set to 0 makes cyg_tsleep waiting for a
>> blocking semaphore at line 325 of the file synch.c
>> (net/tcpip/current/src/ecos/synch.c). And the wait time is usually long and
>> triggers the watchdog process in my application.
>>
>> I would like to know that there is any way to set up a timeout on socket
>> before calling connect() so that the application will be able to get out
>> this blocking situation ?
>>
>> Any idea or sugestion will be appreciated.
>>
>
> Take a look at
> http://www.developerweb.net/forum/showthread.php?p=13486. You will
> need to modify the ftpclient code to implement this scheme for
> connect.
>
> Andrew
>
>
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next prev parent reply other threads:[~2008-01-04 10:09 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-02 11:02 [ECOS] Application is blocked on the while loop within bsd_connect() function NGUYEN Thanh SILICOMP
2008-01-03 11:55 ` Andrew Lunn
2008-01-04 10:09 ` NGUYEN Thanh SILICOMP [this message]
2008-01-04 14:54 ` [ECOS] Application is blocked on the while loop withinbsd_connect() function Gary Thomas
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