[newlib-cygwin] add SIOCGIFDATA ioctl

[Sebastian Huber <sh@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=9dd91a8330a968aaf970d32dd3a72f1e5dd72b43

commit 9dd91a8330a968aaf970d32dd3a72f1e5dd72b43
Author: Ed Maste <emaste@FreeBSD.org>
Date:   Mon Sep 28 16:54:39 2020 +0000

    add SIOCGIFDATA ioctl
    
    For interfaces that do not support SIOCGIFMEDIA (for which there are
    quite a few) the only fallback is to query the interface for
    if_data->ifi_link_state.  While it's possible to get at if_data for an
    interface via getifaddrs(3) or sysctl, both are heavy weight mechanisms.
    
    SIOCGIFDATA is a simple ioctl to retrieve this fast with very little
    resource use in comparison.  This implementation mirrors that of other
    similar ioctls in FreeBSD.
    
    Submitted by:   Roy Marples <roy@marples.name>
    Reviewed by:    markj
    MFC after:      1 month
    Differential Revision:  https://reviews.freebsd.org/D26538

Diff:
---
 newlib/libc/sys/rtems/include/sys/sockio.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/newlib/libc/sys/rtems/include/sys/sockio.h b/newlib/libc/sys/rtems/include/sys/sockio.h
index 447e2c884..03502d770 100644
--- a/newlib/libc/sys/rtems/include/sys/sockio.h
+++ b/newlib/libc/sys/rtems/include/sys/sockio.h
@@ -83,6 +83,7 @@
 #define	SIOCSIFDESCR	 _IOW('i', 41, struct ifreq)	/* set ifnet descr */ 
 #define	SIOCGIFDESCR	_IOWR('i', 42, struct ifreq)	/* get ifnet descr */ 
 #define	SIOCAIFADDR	 _IOW('i', 43, struct ifaliasreq)/* add/chg IF alias */
+#define	SIOCGIFDATA	 _IOW('i', 44, struct ifreq)	/* get if_data */
 
 #define	SIOCADDMULTI	 _IOW('i', 49, struct ifreq)	/* add m'cast addr */
 #define	SIOCDELMULTI	 _IOW('i', 50, struct ifreq)	/* del m'cast addr */