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83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
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/* Test listing of network interface addresses.
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Copyright (C) 2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ifaddrs.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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int
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main (void)
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{
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int failures = 0;
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struct ifaddrs *ifaces, *ifa;
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if (getifaddrs (&ifaces) < 0)
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{
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if (errno != ENOSYS)
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{
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printf ("Couldn't get any interfaces: %s.\n", strerror (errno));
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exit (1);
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}
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/* The function is simply not implemented. */
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exit (0);
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}
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puts ("\
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Name Flags Address Netmask Broadcast/Destination");
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for (ifa = ifaces; ifa != NULL; ifa = ifa->ifa_next)
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{
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char abuf[64], mbuf[64], dbuf[64];
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inline const char *addr_string (struct sockaddr *sa, char *buf)
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{
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switch (sa->sa_family)
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{
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case AF_INET:
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return inet_ntop (AF_INET,
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&((struct sockaddr_in *) sa)->sin_addr,
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buf, sizeof abuf);
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case AF_INET6:
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return inet_ntop (AF_INET6,
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&((struct sockaddr_in6 *) sa)->sin6_addr,
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buf, sizeof abuf);
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case AF_UNSPEC:
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return "---";
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default:
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++failures;
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printf ("sa_family=%d %08x\n", sa->sa_family,
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*(int*)&((struct sockaddr_in *) sa)->sin_addr.s_addr);
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return "<unexpected sockaddr family>";
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}
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}
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printf ("%-15s%#.4x %-15s %-15s %-15s\n",
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ifa->ifa_name, ifa->ifa_flags,
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addr_string (ifa->ifa_addr, abuf),
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addr_string (ifa->ifa_netmask, mbuf),
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addr_string (ifa->ifa_broadaddr, dbuf));
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}
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freeifaddrs (ifaces);
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return failures ? 1 : 0;
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}
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