How to get the IPv6 address of next hop towards destination?

How to get the IPv6 address of next hop towards destination?

[Zheng Jianping]

Hi,

I'm modifying the Linux kernel (2.4.7.10) to support IPv6 multicast
forwarding. As required by IPv6 multicast routing protocol, the IPv6 address
of next hop towards destination is needed. So how can I get this
information?

Calling  struct dst_entry * ip6_route_output(struct sock *sk, struct flowi
*fl)
can get dst_entry which has a member
    struct neighbour *neighbour;
But I don't know which member in 'struct neighbor' stores the IPv6 address.
It seems  that
  u8   primary_key[0];
is responsible for it.

Is it right?

Thanks,
Zheng Jianping

----------------------------------------------------------------------------
---------------------------
Multimedia Communication & Network Engneering Research Center
Institue of Software, Chiese Academy of Sciences

Email: zjp@iscas.ac.cn
Tel:     6255,5523

Re: How to get the IPv6 address of next hop towards destination?

[YOSHIFUJI Hideaki / 吉藤英明]

In article <000d01c2975d$a2ad3c10$6c06a8c0@zhengjp> (at Fri, 29 Nov 2002 12:13:13 +0800), "Zheng Jianping" <zjp@iscas.ac.cn> says:

> It seems  that
>   u8   primary_key[0];
> is responsible for it.
> 
> Is it right?

yes.

--yoshfuji

Re: How to get the IPv6 address of next hop towards destination?

[Zheng Jianping]

Hi, Yoshfuji,

What's type of the address stored in primary_key[0], link-local or global?

Thanks,
Zheng

> In article <000d01c2975d$a2ad3c10$6c06a8c0@zhengjp> (at Fri, 29 Nov 2002
12:13:13 +0800), "Zheng Jianping" <zjp@iscas.ac.cn> says:
>
> > It seems  that
> >   u8   primary_key[0];
> > is responsible for it.
> >
> > Is it right?
>
> yes.
>
> --yoshfuji
>
>