On Wed, 30 Jan 2002 11:47:34 +0100
Joerg Eggink <joerg.eggink@ccrle.nec.de> wrote:
> The goal of my program is to set a new Address for my own interface. For
> this i will call the ndisc_rcv function with an own created sk_buff.
> I think I don't need an ethernet header for this.
Why don't you want to use ndisc_send_na() or neigh_update()?
> My problem is the ICMPv6 header.
> After calling the function ndisc_rcv I get the message "the code is not
> zero" or somethink else. I think the ICMPv6 header is not on the right
> place in the sk_buff.
Hmm, it is very strange error...
> The ndisc_rcv function read the icmp header with
> struct ra_msg *ra_msg = (struct ra_msg *) skb->h.raw
>
> and i write the icmp header in my module with
> struct ra_msg *msg;
> msg = skb_put (skb , msg_len);
I think the thing is here:
skb_alloc();
================================
^
tail,data; len = 0;
skb_reserve()
================================
^
data,tail; len = somthing;
skb_push(ethernet_length);
================================
^ ^
data tail; len -= tail-data;
skb_put(ip6hdr_length);
================================
^ ^
data tail; len += sizeof(struct ipv6_hdr);
But in you case here will be some other picture:
skb_alloc();
================================
^
tail,data; len = 0;
skb_put(ip6hdr_length);
================================
^ ^
data tail, len = sizeof(struct ipv6_hdr);
from ndisc_rcv();
__skb_push(skb, skb->data-skb->h.raw);
In your case second parameter is something nonunderstandable..
So i still hope, that skb_reserve(16) and skb_push(14) should help you.
> Or do you have another idea to set a new interface address in the same
> way as the router advertisement.
Maybe ndisc_send_na() or neigh_update() could help you?
Or even some ioctl, which can be got from ifconfig.c.
Good luck.
> Regards Jörg
Evgeniy Polyakov ( s0mbre ).
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