hello glynn,
again a line to add to my previous remark...
sorry glynn, you are right. Actually the place where i
had computed the checksum in my progs , i was not
sending any data so i looked at that code and sent the
code....the kernel code clears everything thanks....
malhacker
--- Mal Hacker <malhacker@yahoo.com> wrote:
> hello GLynn,
> Only oneline i would like to add to this is test it,
> try it and see the results, or look at code.....
> happy checksumming....
> malhacker
>
>
> --- Glynn Clements <glynn.clements@virgin.net>
> wrote:
> >
> > Mal Hacker wrote:
> >
> > > TCP checksums are evaluated by attaching a
> pseudo
> > > header in the start of the TCP segment which u
> are
> > > going to be sent. Actually that pseudo header is
> > like
> > > this...
> > >
> > > struct pseudohdr
> > > {
> > > struct in_addr source_address; // 32
> bit
> > netid/hostid
> > > struct in_addr dest_address; // 32
> bit
> > netid/hostid
> > > unsigned char place_holder;
> > > unsigned char protocol;
> > > unsigned short length;
> > > struct tcphdr tcp;
> > > } phdr;
> > >
> > >
> > > where the protocol is IPPROTO_TCP , place holder
> > is
> > > zero and length is htons(sizeof(struct tcphdr));
> >
> > length is the length of the header and data, not
> > just the header.
> >
> > --
> > Glynn Clements <glynn.clements@virgin.net>
> > -
> > : send the line
> > "unsubscribe linux-net" in
> > the body of a message to majordomo@vger.kernel.org
>
>
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