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Mac hardware addresses

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Mac hardware addresses

Subject: Mac hardware addresses
From: Todd Heberlein <email@hidden>
Date: Mon, 13 Jul 2009 18:18:57 -0700

I am trying to extract all the ethernet addresses for my Mac, and I am stuck. I can use

	ioctl(fd, SIOCGIFCONF, (char*)&if_conf)

and walk through all the interfaces, but the ifreq data structure doesn't appear to have MAC address information. When one of the interface addresses is AF_INET, I try

	ioctl(fd, SIOCARPIPLL, &arp_req)

with the IPv4 address set in the arp_req, but the call seems to fail for me every time.

Any suggestions or hints?

Thanks,

Todd

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