Differential D24524 Diff 70926 head/lib/libc/net/if_indextoname.c

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	*/			*/

	char *			char *
	if_indextoname(unsigned int ifindex, char *ifname)			if_indextoname(unsigned int ifindex, char *ifname)
	{			{
	struct ifaddrs ifaddrs, ifa;			struct ifaddrs ifaddrs, ifa;
	int error = 0;			int error = 0;

				if (ifindex == 0) {
				errno = ENXIO;
				return(NULL);
				}

	if (getifaddrs(&ifaddrs) < 0)			if (getifaddrs(&ifaddrs) < 0)
	return(NULL); /* getifaddrs properly set errno */			return(NULL); /* getifaddrs properly set errno */

	for (ifa = ifaddrs; ifa != NULL; ifa = ifa->ifa_next) {			for (ifa = ifaddrs; ifa != NULL; ifa = ifa->ifa_next) {
	if (ifa->ifa_addr &&			if (ifa->ifa_addr &&
	ifa->ifa_addr->sa_family == AF_LINK &&			ifa->ifa_addr->sa_family == AF_LINK &&
	ifindex == LLINDEX((struct sockaddr_dl*)ifa->ifa_addr))			ifindex == LLINDEX((struct sockaddr_dl*)ifa->ifa_addr))
	break;			break;
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