Chris, optional means it can be enable or not, how to enable it and get the header to verify the checksum. On Thu, 2011-02-10 at 15:14 +1100, Chris Donovan 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- > > On Thu, Feb 10, 2011 at 2:41 PM, Randi <nightdecoder@xxxxxxxxx> wrote: > > Hi All, > > > > Since UDP socket is not reliable, what the common way in user level to > > check UDP communication's data for error (eg. malformed, corrupted, > > etc.)? is the checksum field in the UDP header (struct udphdr) intended > > to this problem? > > > > Randi -- To unsubscribe from this list: send the line "unsubscribe linux-c-programming" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html