* [ECOS] Application is blocked on the while loop within bsd_connect() function
@ 2008-01-02 11:02 NGUYEN Thanh SILICOMP
2008-01-03 11:55 ` Andrew Lunn
0 siblings, 1 reply; 4+ messages in thread
From: NGUYEN Thanh SILICOMP @ 2008-01-02 11:02 UTC (permalink / raw)
To: ecos-discuss
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.
Thank in advance for your helps.
Thanh NGUYEN
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [ECOS] Application is blocked on the while loop within bsd_connect() function
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 ` [ECOS] Application is blocked on the while loop withinbsd_connect() function NGUYEN Thanh SILICOMP
0 siblings, 1 reply; 4+ messages in thread
From: Andrew Lunn @ 2008-01-03 11:55 UTC (permalink / raw)
To: NGUYEN Thanh SILICOMP; +Cc: ecos-discuss
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
--
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [ECOS] Application is blocked on the while loop withinbsd_connect() function
2008-01-03 11:55 ` Andrew Lunn
@ 2008-01-04 10:09 ` NGUYEN Thanh SILICOMP
2008-01-04 14:54 ` Gary Thomas
0 siblings, 1 reply; 4+ messages in thread
From: NGUYEN Thanh SILICOMP @ 2008-01-04 10:09 UTC (permalink / raw)
To: ecos-discuss
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
>
>
--
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [ECOS] Application is blocked on the while loop withinbsd_connect() function
2008-01-04 10:09 ` [ECOS] Application is blocked on the while loop withinbsd_connect() function NGUYEN Thanh SILICOMP
@ 2008-01-04 14:54 ` Gary Thomas
0 siblings, 0 replies; 4+ messages in thread
From: Gary Thomas @ 2008-01-04 14:54 UTC (permalink / raw)
To: NGUYEN Thanh SILICOMP; +Cc: ecos-discuss
NGUYEN Thanh SILICOMP wrote:
> 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.
Perhaps you could send a patch with your changes and we could
wrap them into the public source, with some CDL, etc?
> 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
>>
>>
>
--
------------------------------------------------------------
Gary Thomas | Consulting for the
MLB Associates | Embedded world
------------------------------------------------------------
--
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
^ permalink raw reply [flat|nested] 4+ messages in thread
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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 ` [ECOS] Application is blocked on the while loop withinbsd_connect() function NGUYEN Thanh SILICOMP
2008-01-04 14:54 ` Gary Thomas
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