Function netname

tools/netstat/route.c:560–579

* Return the name of the network whose address is given. */

 * Return the name of the network whose address is given.
 */
const char *
netname(struct sockaddr *sa, struct sockaddr *mask)
{
	switch (sa->sa_family) {
	case AF_INET:
		if (mask != NULL)
			return (netname4(satosin(sa)->sin_addr.s_addr,
			    satosin(mask)->sin_addr.s_addr));
		else
			return (netname4(satosin(sa)->sin_addr.s_addr,
			    INADDR_ANY));
		break;
#ifdef INET6
	case AF_INET6:
		return (netname6(satosin6(sa), satosin6(mask)));
#endif /* INET6 */
	default:
		return (NULL);
	}
}

static const char *
netname4(in_addr_t in, in_addr_t mask)