components/ip.c
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
/* See LICENSE file for copyright and license details. */ #ifdef __linux__ #include <err.h> #include <ifaddrs.h> #include <netdb.h> #include <stdio.h> #include <string.h> #include "../util.h" const char * ipv4(const char *iface) { struct ifaddrs *ifaddr, *ifa; int s; char host[NI_MAXHOST]; if (getifaddrs(&ifaddr) == -1) { warn("Failed to get IPv4 address for interface %s", iface); return NULL; } for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) { if (ifa->ifa_addr == NULL) { continue; } s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST); if ((strcmp(ifa->ifa_name, iface) == 0) && (ifa->ifa_addr->sa_family == AF_INET)) { if (s != 0) { warnx("Failed to get IPv4 address for interface %s", iface); 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) == -1) { warn("Failed to get IPv6 address for interface %s", iface); return NULL; } for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) { if (ifa->ifa_addr == NULL) { continue; } s = getnameinfo(ifa->ifa_addr, sizeof(struct sockaddr_in6), host, NI_MAXHOST, NULL, 0, NI_NUMERICHOST); if ((strcmp(ifa->ifa_name, iface) == 0) && (ifa->ifa_addr->sa_family == AF_INET6)) { if (s != 0) { warnx("Failed to get IPv6 address for interface %s", iface); return NULL; } return bprintf("%s", host); } } freeifaddrs(ifaddr); return NULL; } #endif