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[src/trunk]: src/lib/libc/net - SIOCGIFINDEX was added in 2013, but if_freena...
details: https://anonhg.NetBSD.org/src/rev/eab23b069bd9
branches: trunk
changeset: 992269:eab23b069bd9
user: msaitoh <msaitoh%NetBSD.org@localhost>
date: Wed Aug 22 03:12:31 2018 +0000
description:
- SIOCGIFINDEX was added in 2013, but if_freenameindex(3) have not used it
for years. Use it to improve performance. Same as FreeBSD.
- KNF.
diffstat:
lib/libc/net/if_nametoindex.c | 23 +++++++++++++++++++----
1 files changed, 19 insertions(+), 4 deletions(-)
diffs (65 lines):
diff -r aa59a5bfac21 -r eab23b069bd9 lib/libc/net/if_nametoindex.c
--- a/lib/libc/net/if_nametoindex.c Wed Aug 22 01:05:21 2018 +0000
+++ b/lib/libc/net/if_nametoindex.c Wed Aug 22 03:12:31 2018 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: if_nametoindex.c,v 1.5 2015/09/01 09:54:34 ozaki-r Exp $ */
+/* $NetBSD: if_nametoindex.c,v 1.6 2018/08/22 03:12:31 msaitoh Exp $ */
/* $KAME: if_nametoindex.c,v 1.6 2000/11/24 08:18:54 itojun Exp $ */
/*-
@@ -28,19 +28,21 @@
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
-__RCSID("$NetBSD: if_nametoindex.c,v 1.5 2015/09/01 09:54:34 ozaki-r Exp $");
+__RCSID("$NetBSD: if_nametoindex.c,v 1.6 2018/08/22 03:12:31 msaitoh Exp $");
#endif /* LIBC_SCCS and not lint */
#ifndef RUMP_ACTION
#include "namespace.h"
#endif
#include <sys/types.h>
+#include <sys/ioctl.h>
#include <sys/socket.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <ifaddrs.h>
#include <stdlib.h>
#include <string.h>
+#include <unistd.h>
#include <errno.h>
#ifndef RUMP_ACTION
@@ -71,11 +73,24 @@
unsigned int
if_nametoindex(const char *ifname)
{
+ int s;
+ struct ifreq ifr;
struct ifaddrs *ifaddrs, *ifa;
unsigned int ni;
+ s = socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
+ if (s != -1) {
+ memset(&ifr, 0, sizeof(ifr));
+ strlcpy(ifr.ifr_name, ifname, sizeof(ifr.ifr_name));
+ if (ioctl(s, SIOCGIFINDEX, &ifr) != -1) {
+ close(s);
+ return (ifr.ifr_index);
+ }
+ close(s);
+ }
+
if (getifaddrs(&ifaddrs) < 0)
- return(0);
+ return 0;
ni = 0;
@@ -92,5 +107,5 @@
freeifaddrs(ifaddrs);
if (!ni)
errno = ENXIO;
- return(ni);
+ return ni;
}
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