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You can get it from the sk_buff kernel data structure for the packet that arrived ... the <br />
struct timeval &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;stamp;<br />
has exactly what you are looking for ...<br />
<br />
you can find the struct definition in include/linux/Skbuff.c 
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You can get it from the sk_buff kernel data structure for the packet that arrived ... the
struct timeval      stamp;
has exactly what you are looking for ...

you can find the struct definition in include/linux/Skbuff.c

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Kernel data structure? Am I able to access it from user space? If it can be accessed, how would I obtain that value?
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Kernel data structure? Am I able to access it from user space? If it can be accessed, how would I obtain that value?

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Hi iemonslice,<br />
<br />
I came across this new How-to <br />
<a href="http://www.iptables.org/documentation/HOWTO//netfilter-hacking-HOWTO-4.html" rel="ugc">http://www.iptables.org/documentation/HOWTO//netfilter-hacking-HOWTO-4.html</a><br />
<br />
It seems that it is possible to do some packet handling in user space using libipq ... There is a section devoted to libipq in this how-to .. I am not sure if it would allow access to skb from user space, but still go through it
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Hi iemonslice,

I came across this new How-to
http://www.iptables.org/documentation/HOWTO//netfilter-hacking-HOWTO-4.html [http://www.iptables.org/documentation/HOWTO//netfilter-hacking-HOWTO-4.html]

It seems that it is possible to do some packet handling in user space using libipq ... There is a section devoted to libipq in this how-to .. I am not sure if it would allow access to skb from user space, but still go through it

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<div class="content wysiwyg-content">
Is there way to obtain the precise time when a UDP packet *arrives*? By arrives I mean the exact time it gets buffered in the receive queue and NOT the time when I do a recv()/recvfrom().
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</div>


Is there way to obtain the precise time when a UDP packet *arrives*? By arrives I mean the exact time it gets buffered in the receive queue and NOT the time when I do a recv()/recvfrom().

Is there way to obtain the precise time when a UDP packet *arrives*?

Kernel programming for Linux operating systems can be done with many different languages; C, C++, Python, Perl and Java, which are some of the most common languages used.There are also many different varieties of Linux, such as Ubuntu, Fedora and OpenSUSE.