On 6/05/10 12:22 AM, Peter Memishian wrote:
I looked at the documentation for 2009/232 but didn't see the answer to a
couple of semantic issues:
* Does the SIOCGIFHWADDR fail if the given interface is not plumbed
for the requested address family?
For PF_PACKET, the interface must be known to GLD, so it doesn't need to
be plumbed, as such. For PF_INET and PF_INET6, yes, the interface must
at least be plumb'd.
* Does the SIOCGIFHWADDR fail if the given interface does not have
a hardware address (e.g., IFF_LOOPBACK/IFF_IPMP interfaces)?
It will fail but for different reasons. For PF_PACKET, loopback and IPMP
interface names are unknown to GLD, whereas at IP, the interface is not
a hardware interface so there is no information to return.
Darren
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