Re: loopback packet processing.

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
[off-list ref] 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