Re: UDP data

Glynn Clements <[email protected]> Thu, 10 Feb 2011 15:41:20 +0000

Newsgroups	org.kernel.vger.linux-c-programming
Message-ID	<[email protected]>

Randi wrote:

> > Yes the checksum is for the header and data.
> > Keep in mind that the checksum value is optional in ipv4, but required in ipv6.
> 
> Chris, optional means it can be enable or not, how to enable it and get
> the header to verify the checksum.

Checksums are enabled by default. You can disable checksums when
sending using the SO_NO_CHECK option. On receipt, the kernel will
verify the checksum if it's present, and discard the packet if there
is an error.

-- 
Glynn Clements <[email protected]>