[Click] TCP Option field

[Roman Chertov]

You can actually do it yourself.  You just need to check that the header 
indeed has options and then check for the options.  Just follow the 
options RFC to do it.  You will also have to deal with cases when 
padding is used/not used.
Basic idea
1. Check that options are present
2. Get a pointer past the standard TCP header
3. Check if noop is present
4. check the type and then use the RFC to determine where the next
    option is.

Roman

el.drago at tiscali.it wrote:
> Hi to all, 
> 
> I have an urgent question about how to read/write/set the TCP-Option 
> Field.
> 
> I searched in /include/clicknet/tcp.h but there were only #define 
> about it, but nothing else, even if i see that click can extract the 
> Timestamp value from the packet and I know that it is memorized in the 
> option field.
> 
> After having "googled" in the web and in the mailing list I have 
> decided to ask here if somebody knows how to gain access and/or how to 
> set that field if not present in the packet analyzed.
> 
> Has anyone the answer about it?
> Please help me or give me advices about this problem, because I spent 
> about a month on it before deciding to ask and now I don't have idea 
> how to continue.
> 
> Thanks in advance and best regards,
> Max Dragoni
> 
> PS: please forgive my bad english :)
> 
> 
> 
> 
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