Re: Function to determine if IP exists on a net-device?

[Ben Greear <greearb@xxxxxxxxxxxxxxx>]

David S. Miller wrote:
> On Wed, 19 Nov 2003 01:25:06 -0800
> Ben Greear <greearb@xxxxxxxxxxxxxxx> wrote:
>
>
> > Is there a method already written that will tell me if an IP exists on
> > a netdevice?
> >
> > If not, I am quite sure the answer lies in the in_ifaddr
> > list, but which field holds the IP address for the device?
>
>
> Call getifaddrs(), walk the list finding the each and every list entry
> with the 'ifa_name' name matching the device you want.  If there are
> multiple addresses attached to an interface there will be multiple
> in_ifaddr list entries with the 'ifa_name' of your interface.
>
> In each of those entry, check the sockaddr pointed to by the 'ifa_addr'
> field.


Is there not a more direct access if I already have the netdevice in question?
ie, can I get at the list by looking at dev->ip_ptr struct?


Thanks,
Ben


--
Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc  http://www.candelatech.com