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
67
68
69
70
71
72
73
74
75
76
77
78
|
/* See LICENSE file for copyright and license details. */
#include <errno.h>
#include <ifaddrs.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>
#if defined(__OpenBSD__)
#include <sys/types.h>
#include <sys/socket.h>
#endif
#include "../util.h"
const char *
ipv4(const char *iface)
{
struct ifaddrs *ifaddr, *ifa;
int s;
char host[NI_MAXHOST];
if (getifaddrs(&ifaddr) < 0) {
warn("getifaddrs:");
return NULL;
}
for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
if (!ifa->ifa_addr) {
continue;
}
s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host,
NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
if (!strcmp(ifa->ifa_name, iface) &&
(ifa->ifa_addr->sa_family == AF_INET)) {
if (s != 0) {
warn("getnameinfo: %s", gai_strerror(s));
return NULL;
}
return bprintf("%s", host);
}
}
freeifaddrs(ifaddr);
return NULL;
}
const char *
ipv6(const char *iface)
{
struct ifaddrs *ifaddr, *ifa;
int s;
char host[NI_MAXHOST];
if (getifaddrs(&ifaddr) < 0) {
warn("getifaddrs:");
return NULL;
}
for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
if (!ifa->ifa_addr) {
continue;
}
s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in6), host,
NI_MAXHOST, NULL, 0, NI_NUMERICHOST);
if (!strcmp(ifa->ifa_name, iface) &&
(ifa->ifa_addr->sa_family == AF_INET6)) {
if (s != 0) {
warn("getnameinfo: %s", gai_strerror(s));
return NULL;
}
return bprintf("%s", host);
}
}
freeifaddrs(ifaddr);
return NULL;
}
|
