Revised revision 199201 (add interface description capability as inspired

by OpenBSD), based on comments from many, including rwatson, jhb, brooks
and others.

Sponsored by:	iXsystems, Inc.
MFC after:	1 month

1 files changed, 10 insertions, 0 deletions

diff --git a/sys/net/if.h b/sys/net/if.h
index f94b54a..aff0d76 100644
--- a/sys/net/if.h
+++ b/sys/net/if.h
@@ -284,6 +284,14 @@ struct if_announcemsghdr {
 #define	IFAN_DEPARTURE	1	/* interface departure */
 
 /*
+ * Buffer with length to be used in SIOCGIFDESCR/SIOCSIFDESCR requests
+ */
+struct ifreq_buffer {
+	size_t	length;
+	void	*buffer;
+};
+
+/*
  * Interface request structure used for socket
  * ioctl's.  All interface ioctl's must have parameter
  * definitions which begin with ifr_name.  The
@@ -295,6 +303,7 @@ struct	ifreq {
 		struct	sockaddr ifru_addr;
 		struct	sockaddr ifru_dstaddr;
 		struct	sockaddr ifru_broadaddr;
+		struct	ifreq_buffer ifru_buffer;
 		short	ifru_flags[2];
 		short	ifru_index;
 		int	ifru_jid;
@@ -308,6 +317,7 @@ struct	ifreq {
 #define	ifr_addr	ifr_ifru.ifru_addr	/* address */
 #define	ifr_dstaddr	ifr_ifru.ifru_dstaddr	/* other end of p-to-p link */
 #define	ifr_broadaddr	ifr_ifru.ifru_broadaddr	/* broadcast address */
+#define	ifr_buffer	ifr_ifru.ifru_buffer	/* user supplied buffer with its length */
 #define	ifr_flags	ifr_ifru.ifru_flags[0]	/* flags (low 16 bits) */
 #define	ifr_flagshigh	ifr_ifru.ifru_flags[1]	/* flags (high 16 bits) */
 #define	ifr_jid		ifr_ifru.ifru_jid	/* jail/vnet */