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authorRoland McGrath <roland@gnu.org>2002-07-24 22:56:44 +0000
committerRoland McGrath <roland@gnu.org>2002-07-24 22:56:44 +0000
commit7f1deee65e0a90d9e6699068b5d63a28d2546e12 (patch)
treeb75aefbdd5d6d8347e0d4d3f665d8e49fcf6c43b /inet/test-ifaddrs.c
parent11d657d7278ae4f96f0f4c8655991f2818d0eeb9 (diff)
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Added <ifaddrs.h> interface with functions `getifaddrs', `freeifaddrs'.
This implementation supports only IPv4. * inet/ifaddrs.h: New file. * sysdeps/generic/ifaddrs.c: New file. * sysdeps/gnu/ifaddrs.c: New file. * inet/test-ifaddrs.c: New file. * inet/Makefile (routines): Add ifaddrs. (headers): Add ifaddrs.h here. (tests): Add test-ifaddrs. * inet/Versions (GLIBC_2.3): New set, add getifaddrs and freeifaddrs. * resolv/res_hconf.c (_res_hconf_reorder_addrs): Use an explicit socket call to get an AF_INET socket, instead of using __opensock. The SIOCGIFNETMASK ioctl will work only with a PF_INET socket. * sysdeps/generic/ifreq.h (__ifreq): Take third argument SOCKFD, if not -1 use it instead of calling __opensock. * sysdeps/unix/sysv/linux/ifreq.h (__ifreq): Likewise. * sysdeps/mach/hurd/ifreq.h (__ifreq): Take new argument and ignore it. * resolv/res_hconf.c (_res_hconf_reorder_addrs): Pass new argument. * sysdeps/mach/hurd/ifreq.h: New file. * sysdeps/generic/ifreq.h (__if_freereq): Take second argument NUM_IFS. * sysdeps/unix/sysv/linux/ifreq.h (__if_freereq): Likewise. * resolv/res_hconf.c (_res_hconf_reorder_addrs): Update caller.
Diffstat (limited to 'inet/test-ifaddrs.c')
-rw-r--r--inet/test-ifaddrs.c82
1 files changed, 82 insertions, 0 deletions
diff --git a/inet/test-ifaddrs.c b/inet/test-ifaddrs.c
new file mode 100644
index 0000000..42fb7e7
--- /dev/null
+++ b/inet/test-ifaddrs.c
@@ -0,0 +1,82 @@
+/* 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)
+ {
+ 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);
+ 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;
+}