1 /* Test listing of network interface addresses.
2 Copyright (C) 2002-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19 #include <errno.h>
20 #include <stdio.h>
21 #include <stdlib.h>
22 #include <string.h>
23 #include <ifaddrs.h>
24 #include <netinet/in.h>
25 #include <arpa/inet.h>
26
27 static int failures;
28
29 static const char *
addr_string(struct sockaddr * sa,char * buf,size_t size)30 addr_string (struct sockaddr *sa, char *buf, size_t size)
31 {
32 if (sa == NULL)
33 return "<none>";
34
35 switch (sa->sa_family)
36 {
37 case AF_INET:
38 return inet_ntop (AF_INET, &((struct sockaddr_in *) sa)->sin_addr,
39 buf, size);
40 case AF_INET6:
41 return inet_ntop (AF_INET6, &((struct sockaddr_in6 *) sa)->sin6_addr,
42 buf, size);
43 #ifdef AF_LINK
44 case AF_LINK:
45 return "<link>";
46 #endif
47 case AF_UNSPEC:
48 return "---";
49
50 #ifdef AF_PACKET
51 case AF_PACKET:
52 return "<packet>";
53 #endif
54
55 default:
56 ++failures;
57 printf ("sa_family=%d %08x\n", sa->sa_family,
58 *(int*)&((struct sockaddr_in *) sa)->sin_addr.s_addr);
59 return "<unexpected sockaddr family>";
60 }
61 }
62
63
64 static int
do_test(void)65 do_test (void)
66 {
67 struct ifaddrs *ifaces, *ifa;
68
69 if (getifaddrs (&ifaces) < 0)
70 {
71 if (errno != ENOSYS)
72 {
73 printf ("Couldn't get any interfaces: %s.\n", strerror (errno));
74 exit (1);
75 }
76 /* The function is simply not implemented. */
77 exit (0);
78 }
79
80 puts ("\
81 Name Flags Address Netmask Broadcast/Destination");
82
83 for (ifa = ifaces; ifa != NULL; ifa = ifa->ifa_next)
84 {
85 char abuf[64], mbuf[64], dbuf[64];
86 printf ("%-15s%#.4x %-15s %-15s %-15s\n",
87 ifa->ifa_name, ifa->ifa_flags,
88 addr_string (ifa->ifa_addr, abuf, sizeof (abuf)),
89 addr_string (ifa->ifa_netmask, mbuf, sizeof (mbuf)),
90 addr_string (ifa->ifa_broadaddr, dbuf, sizeof (dbuf)));
91 }
92
93 freeifaddrs (ifaces);
94
95 return failures ? 1 : 0;
96 }
97
98 #define TEST_FUNCTION do_test ()
99 #include "../test-skeleton.c"
100