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/* Test listing of network interface addresses.
Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ifaddrs.h>
#include <netinet/in.h>
#include <arpa/inet.h>
int
main (void)
{
int failures = 0;
struct ifaddrs *ifaces, *ifa;
if (getifaddrs (&ifaces) < 0)
{
if (errno != ENOSYS)
{
printf ("Couldn't get any interfaces: %s.\n", strerror (errno));
exit (1);
}
/* The function is simply not implemented. */
exit (0);
}
puts ("\
Name Flags Address Netmask Broadcast/Destination");
for (ifa = ifaces; ifa != NULL; ifa = ifa->ifa_next)
{
char abuf[64], mbuf[64], dbuf[64];
inline const char *addr_string (struct sockaddr *sa, char *buf)
{
if (sa == NULL)
return "<none>";
switch (sa->sa_family)
{
case AF_INET:
return inet_ntop (AF_INET,
&((struct sockaddr_in *) sa)->sin_addr,
buf, sizeof abuf);
case AF_INET6:
return inet_ntop (AF_INET6,
&((struct sockaddr_in6 *) sa)->sin6_addr,
buf, sizeof abuf);
#ifdef AF_LINK
case AF_LINK:
return "<link>";
#endif
case AF_UNSPEC:
return "---";
default:
++failures;
printf ("sa_family=%d %08x\n", sa->sa_family,
*(int*)&((struct sockaddr_in *) sa)->sin_addr.s_addr);
return "<unexpected sockaddr family>";
}
}
printf ("%-15s%#.4x %-15s %-15s %-15s\n",
ifa->ifa_name, ifa->ifa_flags,
addr_string (ifa->ifa_addr, abuf),
addr_string (ifa->ifa_netmask, mbuf),
addr_string (ifa->ifa_broadaddr, dbuf));
}
freeifaddrs (ifaces);
return failures ? 1 : 0;
}
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