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authorcvs2git <rtems-devel@rtems.org>2009-07-13 14:20:38 +0000
committercvs2git <rtems-devel@rtems.org>2009-07-13 14:20:38 +0000
commit31f25514fb558b81b48038ccd789b087a093c9ed (patch)
treef446f9da6ccebd990a023077a7f5ff1c4933898a /cpukit/libnetworking/libc/if_indextoname.c
parentdc709596a5472719783026348c8ce68b11ac9b1e (diff)
downloadrtems-4.8.0.tar.bz2
This commit was manufactured by cvs2svn to create tag 'rtems-4-8-0'.4.8.0
Sprout from rtems-4-8-branch 2008-02-14 17:31:53 UTC Joel Sherrill <joel.sherrill@OARcorp.com> '2008-02-14 Joel Sherrill <joel.sherrill@OARcorp.com>' Cherrypick from rtems-4-8-branch 2009-07-13 14:20:37 UTC cvs2git <rtems-devel@rtems.org> 'This commit was manufactured by cvs2svn to create branch 'rtems-4-8-branch'.': contrib/crossrpms/patches/gdb-6.5-bfinrtems-20071114.diff cpukit/libnetworking/ifaddrs.h cpukit/libnetworking/libc/getifaddrs.c cpukit/libnetworking/libc/if_indextoname.c cpukit/libnetworking/libc/if_nameindex.c
Diffstat (limited to 'cpukit/libnetworking/libc/if_indextoname.c')
-rw-r--r--cpukit/libnetworking/libc/if_indextoname.c87
1 files changed, 87 insertions, 0 deletions
diff --git a/cpukit/libnetworking/libc/if_indextoname.c b/cpukit/libnetworking/libc/if_indextoname.c
new file mode 100644
index 0000000000..89e9f2fd66
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+++ b/cpukit/libnetworking/libc/if_indextoname.c
@@ -0,0 +1,87 @@
+/* $KAME: if_indextoname.c,v 1.7 2000/11/08 03:09:30 itojun Exp $ */
+
+/*-
+ * Copyright (c) 1997, 2000
+ * Berkeley Software Design, Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL Berkeley Software Design, Inc. BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * BSDI Id: if_indextoname.c,v 2.3 2000/04/17 22:38:05 dab Exp
+ */
+
+#include <rtems/bsd/sys/cdefs.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <net/if_dl.h>
+#include <net/if.h>
+#include <ifaddrs.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+/*
+ * From RFC 2533:
+ *
+ * The second function maps an interface index into its corresponding
+ * name.
+ *
+ * #include <net/if.h>
+ *
+ * char *if_indextoname(unsigned int ifindex, char *ifname);
+ *
+ * The ifname argument must point to a buffer of at least IF_NAMESIZE
+ * bytes into which the interface name corresponding to the specified
+ * index is returned. (IF_NAMESIZE is also defined in <net/if.h> and
+ * its value includes a terminating null byte at the end of the
+ * interface name.) This pointer is also the return value of the
+ * function. If there is no interface corresponding to the specified
+ * index, NULL is returned, and errno is set to ENXIO, if there was a
+ * system error (such as running out of memory), if_indextoname returns
+ * NULL and errno would be set to the proper value (e.g., ENOMEM).
+ */
+
+char *
+if_indextoname(unsigned int ifindex, char *ifname)
+{
+ struct ifaddrs *ifaddrs, *ifa;
+ int error = 0;
+
+ if (getifaddrs(&ifaddrs) < 0)
+ return(NULL); /* getifaddrs properly set errno */
+
+ for (ifa = ifaddrs; ifa != NULL; ifa = ifa->ifa_next) {
+ if (ifa->ifa_addr &&
+ ifa->ifa_addr->sa_family == AF_LINK &&
+ ifindex == ((struct sockaddr_dl*)ifa->ifa_addr)->sdl_index)
+ break;
+ }
+
+ if (ifa == NULL) {
+ error = ENXIO;
+ ifname = NULL;
+ }
+ else
+ strncpy(ifname, ifa->ifa_name, IFNAMSIZ);
+
+ freeifaddrs(ifaddrs);
+
+ errno = error;
+ return(ifname);
+}