foundry27 : Post

Forum Topic - Socket Buffer size w/ TCP/IP 4.25: (2 Items)

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David Panseri

01/31/2011 1:21 PM

post82800

I am attempting to increase the size of the receive buffer on a UDP socket using setsockopt/SO_RECVBF. The problem is 
that if I set the buffer size any greater than 61680 bytes I get an ENOBUFS error. Is there any way to allocate a buffer
 larger than this?

Oleg Bolshakov

02/01/2011 8:23 AM

post82812

Re: Socket Buffer size w/ TCP/IP 4.25

Hi David,

The TCP/IP 4.25 maximum receive/send buffer size is 61680 bytes. If you 
need to increase buffer size, then you should use TCP/IP 5.0 or TCP/IP 
5.10. With TCP/IP 5 you can increase receive buffer up to 246723 bytes.

The TCP/IP 5.0 can be downloaded from the QNX site:

http://www.qnx.com/download/group.html?programid=8694

The TCP/IP 5.10 is included on the QNX 4 Product Suite CD 2010 
EXPERIMENTAL:

http://community.qnx.com/sf/wiki/do/viewPage/projects.qnx4/wiki/SoftwareUpdates2010

-- 
Respectfully,
Oleg

> I am attempting to increase the size of the receive buffer on a UDP
> socket using setsockopt/SO_RECVBF. The problem is that if I set the
> buffer size any greater than 61680 bytes I get an ENOBUFS error. Is
> there any way to allocate a buffer larger than this?
> 
> 
> 
> _______________________________________________
> 
> QNX4 Community Support
> http://community.qnx.com/sf/go/post82800

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