[VxW] udp socket Programming:

[Girish Kumar I K]

Hi ,

i have used datagram (UDP) socket to implement a simple client sever
communication
system . i can send the less the 1400 bytes to the sever , but if i try to
send more than 1400 bytes i am not
getting error , but data won't reach to the server side . Please help me to
find the exact reason . is it the stack level problem or the BSP .

Regards,

girish

[Chris Cleeland]

You may be exceeding the MTU of your network or some intermediate network.

--
Chris Cleeland, cleeland_c @ ociweb.com, http://www.milodesigns.com/~chris
Principal Software Engineer, Object Computing, Inc., +1 314 579 0066
Support Me Supporting Cancer Survivors in Ride for the Roses 2002
>>>>>>>>> Donate at http://www.milodesigns.com/donate <<<<<<<<<

[Linux G Shang]

Please set breakpoint at the entry of function xxxxSend(...) in your END
Driver.
It may be help you.

VxWorks TCP/IP protocol stack can split large buffer correctly according my
experience.

----- Original Message -----
From: "Girish Kumar I K" <giris...@fedtec.com>
To: <vxwe...@csg.lbl.gov>
Sent: Tuesday, February 11, 2003 1:54 PM
Subject: [VxW] udp socket Programming:

> Hi ,

>
> i have used datagram (UDP) socket to implement a simple client sever
> communication
> system . i can send the less the 1400 bytes to the sever , but if i try
to
> send more than 1400 bytes i am not
> getting error , but data won't reach to the server side . Please help me
to
> find the exact reason . is it the stack level problem or the BSP .
>
>

> Regards,
>
> girish
>
> _______________________________________________
> VxWexplo mailing list
> VxWe...@csg.lbl.gov
> http://www-csg.lbl.gov/mailman/listinfo/vxwexplo

[kms...@hss.hns.com]

Girish

I am not sure but may be its just bcoz 1400 is the MTU configured in the ur
machine and some machine in betwn ur client and server has MTU lesser than this
eventually discarding these packets.

rgds
Krishna

"Girish Kumar I K" <giris...@fedtec.com> on 02/11/2003 11:24:07 AM

Please respond to VxWorks Users Group List <vxwe...@csg.lbl.gov>

To: vxwe...@csg.lbl.gov
cc: (bcc: Krishna M Singh/HSS)

[atul]

Just try to fix the MTU size to 512bytes and try.May be this will work

Regards,
Atul Parmar
Inspiration Technologies Pvt. Ltd.
#445,Kanakpura Main Road,
7th Block- Jayanagar
Bangalore-India
Tel :- 91-80-6761254
91-80-6765335

-----Original Message-----
From: vxwexplo...@csg.lbl.gov [mailto:vxwexplo...@csg.lbl.gov]
On Behalf Of Chris Cleeland
Sent: Tuesday, February 11, 2003 11:28 AM
To: VxWorks Users Group List
Subject: Re: [VxW] udp socket Programming:

On Tue, 11 Feb 2003, Girish Kumar I K wrote:

> i have used datagram (UDP) socket to implement a simple client sever
> communication system . i can send the less the 1400 bytes to the sever

> , but if i try to send more than 1400 bytes i am not getting error ,
> but data won't reach to the server side . Please help me to find the
> exact reason . is it the stack level problem or the BSP .

You may be exceeding the MTU of your network or some intermediate
network.

--
Chris Cleeland, cleeland_c @ ociweb.com,
http://www.milodesigns.com/~chris
Principal Software Engineer, Object Computing, Inc., +1 314 579
0066
Support Me Supporting Cancer Survivors in Ride for the Roses 2002
>>>>>>>>> Donate at http://www.milodesigns.com/donate
<<<<<<<<<

_______________________________________________

[Fatih Ozcan]

Insert length info into packet and wait until you all receive packet in your program.
Packets may be fragmented.
atul <atul....@inspiretech.com> wrote:Just try to fix the MTU size to 512bytes and try.May be this will work

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[BalaSankar R]

Hi Girish,

I read your mail on VxW newsgroup.

I suspect that the total packet size exceeded the MTU
of the outgoing interface / one
of the intermediate link's MTU. This should result in
fragmentation. Because of some reason
(Either Don't fragment flag is set / other reasons)
fragmentation could not occur.
Can you provide more info?

I want to know:
1. The exact data size after which your data did not
reach the server
2. The type of the link through which the client and
server are connect (Ethernet / PPP/other)
3. MTU of the outgoing interface through which the
client sent out the data.

Regards,
BalaSankar.R

Hi ,

i have used datagram (UDP) socket to implement a
simple client sever
communication
system . i can send the less the 1400 bytes to the
sever , but if i try to
send more than 1400 bytes i am not
getting error , but data won't reach to the server
side . Please help me to
find the exact reason . is it the stack level problem
or the BSP .

Regards,

girish

__________________________________________________

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[msafar]

Have you changed the receive and send buffer size on the sockets you are using?
SO_SNDBUF & SO_RCVBUF on SOL_SOCKET level.

msafar

"Girish Kumar I K" <giris...@fedtec.com> wrote in message news:<mailman.1.1044942...@csg.lbl.gov>...