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get offset to user data f...
Forum: Kernel Networking Stack
Last Post: kirankankipati
11-17-2016, 03:10 AM
» Replies: 3
» Views: 719
How to create a portable ...
Forum: Configuration and Setup
Last Post: kirankankipati
09-22-2016, 01:24 PM
» Replies: 3
» Views: 696

 
  get offset to user data from tcp header
Posted by: shyamsaini - 11-15-2016, 03:14 PM - Forum: Kernel Networking Stack - Replies (3)

I searched  and found this link
data from tcp_hdr 

which shows
 

Code:
(char *)((unsigned char *)tcph + (tcph->doff * 4));

Now my questions is, doff is already representing size of tcp-header in 32 bit word form. Then why tcph is added with it   (see above code).

Also why it typecasted in char*  . if we have offset in integer form?

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  How to create a portable VmImage of Ubuntu with mainline kernel
Posted by: shyamsaini - 09-22-2016, 12:54 PM - Forum: Configuration and Setup - Replies (3)

A portable VmImage of ubuntu which is having mainline kernel and which can shared among different users

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