Function print_entry

tools/arp/arp.c:622–717

 */

static void
print_entry(struct sockaddr_dl *sdl,
	struct sockaddr_in *addr, struct rt_msghdr *rtm)
{
	const char *host;
	struct hostent *hp;
	struct if_nameindex *p;

	if (ifnameindex == NULL)
		if ((ifnameindex = if_nameindex()) == NULL)
			xo_err(1, "cannot retrieve interface names");

	xo_open_instance("arp-cache");

	if (nflag == 0)
		hp = gethostbyaddr((caddr_t)&(addr->sin_addr),
		    sizeof addr->sin_addr, AF_INET);
	else
		hp = 0;
	if (hp)
		host = hp->h_name;
	else {
		host = "?";
		if (h_errno == TRY_AGAIN)
			nflag = 1;
	}
	xo_emit("{:hostname/%s} ({:ip-address/%s}) at ", host,
	    inet_ntoa(addr->sin_addr));
	if (sdl->sdl_alen) {
		if ((sdl->sdl_type == IFT_ETHER ||
		    sdl->sdl_type == IFT_L2VLAN ||
		    sdl->sdl_type == IFT_BRIDGE) &&
		    sdl->sdl_alen == ETHER_ADDR_LEN)
			xo_emit("{:mac-address/%s}",
			    ether_ntoa((struct ether_addr *)LLADDR(sdl)));
		else {
			int n = sdl->sdl_nlen > 0 ? sdl->sdl_nlen + 1 : 0;

			xo_emit("{:mac-address/%s}", link_ntoa(sdl) + n);
		}
	} else
		xo_emit("{d:/(incomplete)}{en:incomplete/true}");

	for (p = ifnameindex; p && p->if_index && p->if_name; p++) {
		if (p->if_index == sdl->sdl_index) {
			xo_emit(" on {:interface/%s}", p->if_name);
			break;
		}
	}

	if (rtm->rtm_rmx.rmx_expire == 0)
		xo_emit("{d:/ permanent}{en:permanent/true}");
	else {
		static struct timespec tp;
		if (tp.tv_sec == 0)
			clock_gettime(CLOCK_MONOTONIC, &tp);
		if ((expire_time = rtm->rtm_rmx.rmx_expire - tp.tv_sec) > 0)
			xo_emit(" expires in {:expires/%d} seconds",