From mboxrd@z Thu Jan  1 00:00:00 1970
From: Vinay Reddy <vinayvinay@gmail.com>
Subject: Re: Urgent SNAT help required
Date: Mon, 9 May 2005 18:32:16 +0530
Message-ID: <537f59d105050906025948aa0c@mail.gmail.com>
References: <20050509083018.20467.qmail@web41413.mail.yahoo.com>
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On 5/9/05, cranium2003 <cranium2003@yahoo.com> wrote:
> hello,
>          I want to execute my code at
> NF_IP_POST_ROUTING. For that First i want to know
> which functions are executing at NF_IP_POST_ROUTING
> Hook. Then i have enabled SNAT and I have wrriten code
> at NF_IP_POST_ROUTING but i want to get outgoing
> packets' IP address as new one SNAT'ed IP address not
> the one that is before SNAT? How can i do that?
Execute your code after SNAT has finished.
>          I observe that my code and SNAT are executing
> at same HOOK NF_IP_POST_ROUTING. But my code is
> executed first and then SANT is doen but how to
> reverse that?
Use the following while declaring an nf_hook_ops struct:
struct nf_hook_ops post_route =3D {
  {NULL, NULL},
  post_route_handler,
  THIS_MODULE,
  PF_INET,
  NF_IP_POST_ROUTING,
  NF_IP_PRI_NAT_SRC +1,  // <--- This is important. It is the priority.
};

Note that the last field gives the priority for this handler. The
higher it is, the earlier it is executed.

HTH,
Vinay

> regards,
> cranium
>=20
> Yahoo! Mail
> Stay connected, organized, and protected. Take the tour:
> http://tour.mail.yahoo.com/mailtour.html
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"Debugging is twice as hard as writing the code in the first place.
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