| To: | MANJUNATH <manjunath@xxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: loopback packet processing. |
| From: | Harsh <hanemade@xxxxxxxxx> |
| Date: | Wed, 15 Dec 2004 14:38:54 +0530 |
| Cc: | netdev@xxxxxxxxxxx |
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| In-reply-to: | <Pine.BSF.4.58.0412141649050.71544@ece.iisc.ernet.in> |
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| Reply-to: | Harsh <hanemade@xxxxxxxxx> |
| Sender: | netdev-bounce@xxxxxxxxxxx |
Hi MANJUNATH,
I actually did a lot work on kernel packet processing and
found that ping packet creation enters in ethernet.c.
Also can you tell me what happens in ip_finish_output2 when
ping ICMP packet is created by kernel? what header is added there.
Also in receving end control enters in ethernet.c to check
eth->h_proto field which is ETH_P_IP. How & where it is added by
kernel in case of PING packet?
regards,
Harsh.
On Tue, 14 Dec 2004 16:53:33 +0530 (IST), MANJUNATH
<manjunath@xxxxxxxxxxxxxxxxx> wrote:
>
>
> Hi,
>
> When u send data to the loopback address, control never
> Enters "ethernet" modules.(Data link layer)
>
> Since ping inturn uses program interface to ICMP which is a part
> of IPV4 s/w, for loopback ping IP modules themselves replies. Ethernet
> does not come into picture.
>
> cheers,
> Manjunath
>
>
|
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