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List:       netbsd-tech-net
Subject:    Re: tap interface address
From:       Iain Hibbert <plunky () rya-online ! net>
Date:       2008-08-11 21:16:53
Message-ID: 1218489413.817237.6229.nullmailer () galant ! ukfsn ! org
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On Mon, 11 Aug 2008, der Mouse wrote:

> > So, how do I get to the ethernet address? (technically, it does not
> > have any address family protocol code :)
>
> I thought that's what AF_LINK was for...?

Ok, I admit it.

	s = socket(PF_LINK, SOCK_DGRAM, 0);

	memset(&iflr, 0, sizeof(iflr));
	memcpy(iflr.iflr_name, ifr.ifr_name, IFNAMSIZ);

	sdl = (struct sockaddr_dl *)&iflr.addr;
	sdl->sdl_family = AF_LINK;
	sdl->sdl_len = sizeof(struct sockaddr_dl);
	sdl->sdl_alen = ETHER_ADDR_LEN;

	if (ioctl(s, SIOCGLIFADDR, &iflr) == -1) {
		syslog(LOG_ERR, "Could not get interface address: %m");
		exit(EXIT_FAILURE);
	}

gives me the address with CLLADDR(sdl), thanks!

iain
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