1/*	$NetBSD: trygetif.c,v 1.5 2002/07/14 00:26:18 wiz Exp $	*/
2
3#include <sys/cdefs.h>
4#ifndef lint
5__RCSID("$NetBSD: trygetif.c,v 1.5 2002/07/14 00:26:18 wiz Exp $");
6#endif
7
8/*
9 * trygetif.c - test program for getif.c
10 */
11
12#include <sys/types.h>
13#include <sys/socket.h>
14
15#if defined(SUNOS) || defined(SVR4)
16#include <sys/sockio.h>
17#endif
18
19#include <net/if.h>				/* for struct ifreq */
20#include <netinet/in.h>
21#include <arpa/inet.h>			/* inet_ntoa */
22
23#include <netdb.h>
24#include <stdio.h>
25#include <errno.h>
26
27#include "getif.h"
28
29int
30main(int argc, char **argv)
31{
32	struct hostent *hep;
33	struct sockaddr ea;			/* Ethernet address */
34	struct sockaddr_in *sip;	/* Interface address */
35	struct ifreq *ifr;
36	struct in_addr dst_addr;
37	struct in_addr *dap;
38	int i, s;
39
40	dap = NULL;
41	if (argc > 1) {
42		dap = &dst_addr;
43		if (inet_aton(argv[1], &dst_addr) == 0) {
44			hep = gethostbyname(argv[1]);
45			if (!hep) {
46				fprintf(stderr, "gethostbyname(%s)\n", argv[1]);
47				exit(1);
48			}
49			memcpy(&dst_addr, hep->h_addr, sizeof(dst_addr));
50		}
51	}
52	s = socket(AF_INET, SOCK_DGRAM, 0);
53	if (s < 0) {
54		perror("socket open");
55		exit(1);
56	}
57	ifr = getif(s, dap);
58	if (!ifr) {
59		fprintf(stderr, "no interface for address\n");
60		exit(1);
61	}
62	printf("Intf-name:%s\n", ifr->ifr_name);
63	sip = (struct sockaddr_in *) &(ifr->ifr_addr);
64	printf("Intf-addr:%s\n", inet_ntoa(sip->sin_addr));
65
66	return 0;
67}
68