On Mon, Jan 15, 2001 at 11:09:08AM +0530, Rajnish Madan wrote:
> Hi,
> 
> I am trying to add an IP Address to an Interface.
> I am using SIOCAIFADDR ioctl. But it doesn't seem to work.
> 
> Here is what i have tried to do.
> 
>         sock = socket(AF_INET, SOCK_DGRAM, 0);
> 
>         strncpy(iar.ifra_name,"ex0", strlen("ex0"));
>         iar.ifra_addr.sa_family = AF_INET;
> 
>         strcpy(iar.ifra_addr.sa_data, ip_addr);
> 
>         ret_val = ioctl(sock, SIOCAIFADDR, &iar);

I think you're missing the netmask, and maybe broadcast too.
Also, ifra_addr shoud be interperded as a sockaddr_in in this case, and
as such the IP address shoud be entered as a u_int32_t, not a string.
See the code of ifconfig for examples.

> 
> Ioctl returns success, when i checked using ifconfig -a -A some junk alias was set.
> Also if i try to delete this entry using ifconfig ex0 delete XX, the NetBSD is crashing.

Can you give the stack trace ?

--
Manuel Bouyer <bouyer@antioche.eu.org>
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