blob: 894f17b6e91737f85b78b15c281bb966d37fca39 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
/*
* trygetif.c - test program for getif.c
*/
#include <sys/types.h>
#include <sys/socket.h>
#if defined(SUNOS) || defined(SVR4)
#include <sys/sockio.h>
#endif
#include <net/if.h> /* for struct ifreq */
#include <netinet/in.h>
#include <arpa/inet.h> /* inet_ntoa */
#include <netdb.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
#include "getif.h"
int debug = 0;
char *progname;
main(argc, argv)
char **argv;
{
struct hostent *hep;
struct sockaddr ea; /* Ethernet address */
struct sockaddr_in *sip; /* Interface address */
struct ifreq *ifr;
struct in_addr dst_addr;
struct in_addr *dap;
int i, s;
progname = argv[0]; /* for report */
dap = NULL;
if (argc > 1) {
dap = &dst_addr;
if (inet_aton(argv[1], &dst_addr) == 0) {
hep = gethostbyname(argv[1]);
if (!hep) {
printf("gethostbyname(%s)\n", argv[1]);
exit(1);
}
memcpy(&dst_addr, hep->h_addr, sizeof(dst_addr));
}
}
s = socket(AF_INET, SOCK_DGRAM, 0);
if (s < 0) {
perror("socket open");
exit(1);
}
ifr = getif(s, dap);
if (!ifr) {
printf("no interface for address\n");
exit(1);
}
printf("Intf-name:%s\n", ifr->ifr_name);
sip = (struct sockaddr_in *) &(ifr->ifr_addr);
printf("Intf-addr:%s\n", inet_ntoa(sip->sin_addr));
exit(0);
}
|
