Linux Networking Internals Question

[V.Ravikumar]

Understood Rami Rosen. Thank you.

Regards
Ravi

On Sat, Jun 16, 2018 at 11:10 PM, Rami Rosen <roszenrami at gmail.com> wrote:

> Hi Ravi,
> The path that a packet goes through, from being received by the
> network driver and up to kernel Layer 3 (IPV4/IPV6) and from
> there to kernel Layer 4 (UDP/TCP/SCTP/other sockets) and from there to
> userspace sockets is quite complex. The logic is heavy, on that path
> there are lookups in routing tables, netfilter hooks, sanity checks,
> interaction with other subsystems, and more.
>
> In order to try to simplify things, and not go into deep technical
> details, we can say that generally the 5 tuple of the packet (SRC
> address, DST address, SRC port, DST port and protocol) is what
> determines to which socket it will go.
>
> Regards,
> Rami Rosen
> http://ramirose.wixsite.com/ramirosen
>
>
>
>
> On 16 June 2018 at 20:16, V.Ravikumar <ravikumar.vallabhu at gmail.com>
> wrote:
> > Hi All,
> >
> > I wanted to know how a packet received will be handovered to a correct
> user
> > process.
> > Basically I want to understand what are the various header parameters in
> > packet which will help to  find the open socket descriptor  of respective
> > user process. I'm not able to find the exact  answers in the web.
> >
> > Thanks in advance
> >
> > Regards,
> > Ravi
> >
> > _______________________________________________
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> > Kernelnewbies at kernelnewbies.org
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> >
>
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