1 /*
2 * trygetif.c - test program for getif.c
3 *
4 * $FreeBSD$
5 */
6
7 #include <sys/types.h>
8 #include <sys/socket.h>
9
10 #if defined(SUNOS) || defined(SVR4)
11 #include <sys/sockio.h>
12 #endif
13
14 #ifdef _AIX32
15 #include <sys/time.h> /* for struct timeval in net/if.h */
16 #endif
17 #include <net/if.h> /* for struct ifreq */
18 #include <netinet/in.h>
19 #include <arpa/inet.h> /* inet_ntoa */
20
21 #include <netdb.h>
22 #include <stdio.h>
23 #include <ctype.h>
24 #include <errno.h>
25
26 #include "getif.h"
27
28 int debug = 0;
29 char *progname;
30
31 void
main(argc,argv)32 main(argc, argv)
33 int argc;
34 char **argv;
35 {
36 struct hostent *hep;
37 struct sockaddr_in *sip; /* Interface address */
38 struct ifreq *ifr;
39 struct in_addr dst_addr;
40 struct in_addr *dap;
41 int s;
42
43 progname = argv[0]; /* for report */
44
45 dap = NULL;
46 if (argc > 1) {
47 dap = &dst_addr;
48 if (isdigit(argv[1][0]))
49 dst_addr.s_addr = inet_addr(argv[1]);
50 else {
51 hep = gethostbyname(argv[1]);
52 if (!hep) {
53 printf("gethostbyname(%s)\n", argv[1]);
54 exit(1);
55 }
56 memcpy(&dst_addr, hep->h_addr, sizeof(dst_addr));
57 }
58 }
59 s = socket(AF_INET, SOCK_DGRAM, 0);
60 if (s < 0) {
61 perror("socket open");
62 exit(1);
63 }
64 ifr = getif(s, dap);
65 if (!ifr) {
66 printf("no interface for address\n");
67 exit(1);
68 }
69 printf("Intf-name:%s\n", ifr->ifr_name);
70 sip = (struct sockaddr_in *) &(ifr->ifr_addr);
71 printf("Intf-addr:%s\n", inet_ntoa(sip->sin_addr));
72
73 exit(0);
74 }
75