Add sysctl descriptions to many SYSCTL_XXXs

PR:		kern/11197
Submitted by:	Adrian Chadd <adrian@FreeBSD.org>
Reviewed by:	billf(spelling/style/minor nits)
Looked at by:	bde(style)

12 files changed, 85 insertions, 76 deletions

diff --git a/sys/netinet/in_rmx.c b/sys/netinet/in_rmx.c
index ba65f58..98f86c6 100644
--- a/sys/netinet/in_rmx.c
+++ b/sys/netinet/in_rmx.c
@@ -26,7 +26,7 @@
  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$Id: in_rmx.c,v 1.34 1998/03/30 09:52:46 phk Exp $
+ *	$Id: in_rmx.c,v 1.35 1998/08/05 16:59:20 bde Exp $
  */
 
 /*
@@ -162,19 +162,20 @@ in_matroute(void *v_arg, struct radix_node_head *head)
 
 static int rtq_reallyold = 60*60;
 	/* one hour is ``really old'' */
-SYSCTL_INT(_net_inet_ip, IPCTL_RTEXPIRE, rtexpire,
-	CTLFLAG_RW, &rtq_reallyold , 0, "");
+SYSCTL_INT(_net_inet_ip, IPCTL_RTEXPIRE, rtexpire, CTLFLAG_RW, 
+    &rtq_reallyold , 0, 
+    "Default expiration time on dynamically learned routes");
 				   
 static int rtq_minreallyold = 10;
 	/* never automatically crank down to less */
-SYSCTL_INT(_net_inet_ip, IPCTL_RTMINEXPIRE, rtminexpire,
-	CTLFLAG_RW, &rtq_minreallyold , 0, "");
+SYSCTL_INT(_net_inet_ip, IPCTL_RTMINEXPIRE, rtminexpire, CTLFLAG_RW, 
+    &rtq_minreallyold , 0, 
+    "Minimum time to attempt to hold onto dynamically learned routes");
 				   
 static int rtq_toomany = 128;
 	/* 128 cached routes is ``too many'' */
-SYSCTL_INT(_net_inet_ip, IPCTL_RTMAXCACHE, rtmaxcache,
-	CTLFLAG_RW, &rtq_toomany , 0, "");
-				   
+SYSCTL_INT(_net_inet_ip, IPCTL_RTMAXCACHE, rtmaxcache, CTLFLAG_RW, 
+    &rtq_toomany , 0, "Upper limit on dynamically learned routes");
 
 /*
  * On last reference drop, mark the route as belong to us so that it can be
diff --git a/sys/netinet/ip_flow.c b/sys/netinet/ip_flow.c
index dfb7c1b..fdebdb0 100644
--- a/sys/netinet/ip_flow.c
+++ b/sys/netinet/ip_flow.c
@@ -33,7 +33,7 @@
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  * POSSIBILITY OF SUCH DAMAGE.
  *
- * $Id: ip_flow.c,v 1.6 1998/12/07 21:58:38 archie Exp $
+ * $Id: ip_flow.c,v 1.7 1999/04/11 02:50:42 eivind Exp $
  */
 
 #include <sys/param.h>
@@ -65,7 +65,7 @@ static int ipflow_inuse;
 
 static int ipflow_active = 0;
 SYSCTL_INT(_net_inet_ip, IPCTL_FASTFORWARDING, fastforwarding, CTLFLAG_RW,
-	   &ipflow_active, 0, "");
+    &ipflow_active, 0, "Enable flow-based IP forwarding");
 
 static MALLOC_DEFINE(M_IPFLOW, "ip_flow", "IP flow");
 
diff --git a/sys/netinet/ip_fw.c b/sys/netinet/ip_fw.c
index 4f51b26..f214109 100644
--- a/sys/netinet/ip_fw.c
+++ b/sys/netinet/ip_fw.c
@@ -12,7 +12,7 @@
  *
  * This software is provided ``AS IS'' without any warranties of any kind.
  *
- *	$Id: ip_fw.c,v 1.109 1999/04/24 13:23:48 dt Exp $
+ *	$Id: ip_fw.c,v 1.110 1999/04/26 14:57:24 luigi Exp $
  */
 
 /*
@@ -78,10 +78,15 @@ MALLOC_DEFINE(M_IPFW, "IpFw/IpAcct", "IpFw/IpAcct chain's");
 #ifdef SYSCTL_NODE
 SYSCTL_DECL(_net_inet_ip);
 SYSCTL_NODE(_net_inet_ip, OID_AUTO, fw, CTLFLAG_RW, 0, "Firewall");
-SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, debug, CTLFLAG_RW, &fw_debug, 0, "");
-SYSCTL_INT(_net_inet_ip_fw, OID_AUTO,one_pass,CTLFLAG_RW, &fw_one_pass, 0, "");
-SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, verbose, CTLFLAG_RW, &fw_verbose, 0, "");
-SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, verbose_limit, CTLFLAG_RW, &fw_verbose_limit, 0, "");
+SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, debug, CTLFLAG_RW, 
+    &fw_debug, 0, "Enable printing of debug ip_fw statements");
+SYSCTL_INT(_net_inet_ip_fw, OID_AUTO,one_pass,CTLFLAG_RW, 
+    &fw_one_pass, 0, 
+     "Only do a single pass through ipfw rules when using divert(4)");
+SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, verbose, CTLFLAG_RW, 
+    &fw_verbose, 0, "Log matches to ipfw rules");
+SYSCTL_INT(_net_inet_ip_fw, OID_AUTO, verbose_limit, CTLFLAG_RW, 
+    &fw_verbose_limit, 0, "Set upper limit of matches of ipfw rules logged");
 #endif
 
 #define dprintf(a)	if (!fw_debug); else printf a
diff --git a/sys/netinet/ip_input.c b/sys/netinet/ip_input.c
index a463cd9..1d72f8a 100644
--- a/sys/netinet/ip_input.c
+++ b/sys/netinet/ip_input.c
@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)ip_input.c	8.2 (Berkeley) 1/4/94
- *	$Id: ip_input.c,v 1.116 1999/03/12 01:15:57 julian Exp $
+ *	$Id: ip_input.c,v 1.117 1999/04/20 13:32:05 peter Exp $
  */
 
 #define	_IP_VHL
@@ -85,23 +85,24 @@ struct socket *ip_rsvpd;
 
 int	ipforwarding = 0;
 SYSCTL_INT(_net_inet_ip, IPCTL_FORWARDING, forwarding, CTLFLAG_RW,
-	&ipforwarding, 0, "");
+    &ipforwarding, 0, "Enable IP forwarding between interfaces");
 
 static int	ipsendredirects = 1; /* XXX */
 SYSCTL_INT(_net_inet_ip, IPCTL_SENDREDIRECTS, redirect, CTLFLAG_RW,
-	&ipsendredirects, 0, "");
+    &ipsendredirects, 0, "Enable sending IP redirects");
 
 int	ip_defttl = IPDEFTTL;
 SYSCTL_INT(_net_inet_ip, IPCTL_DEFTTL, ttl, CTLFLAG_RW,
-	&ip_defttl, 0, "");
+    &ip_defttl, 0, "Maximum TTL on IP packets");
 
 static int	ip_dosourceroute = 0;
 SYSCTL_INT(_net_inet_ip, IPCTL_SOURCEROUTE, sourceroute, CTLFLAG_RW,
-	&ip_dosourceroute, 0, "");
+    &ip_dosourceroute, 0, "Enable forwarding source routed IP packets");
 
 static int	ip_acceptsourceroute = 0;
-SYSCTL_INT(_net_inet_ip, IPCTL_ACCEPTSOURCEROUTE, accept_sourceroute,
-	CTLFLAG_RW, &ip_acceptsourceroute, 0, "");
+SYSCTL_INT(_net_inet_ip, IPCTL_ACCEPTSOURCEROUTE, accept_sourceroute, 
+    CTLFLAG_RW, &ip_acceptsourceroute, 0, 
+    "Enable accepting source routed IP packets");
 #ifdef DIAGNOSTIC
 static int	ipprintfs = 0;
 #endif
@@ -113,13 +114,13 @@ static int	ipqmaxlen = IFQ_MAXLEN;
 struct	in_ifaddrhead in_ifaddrhead; /* first inet address */
 struct	ifqueue ipintrq;
 SYSCTL_INT(_net_inet_ip, IPCTL_INTRQMAXLEN, intr_queue_maxlen, CTLFLAG_RD,
-	&ipintrq.ifq_maxlen, 0, "");
+    &ipintrq.ifq_maxlen, 0, "Maximum size of the IP input queue");
 SYSCTL_INT(_net_inet_ip, IPCTL_INTRQDROPS, intr_queue_drops, CTLFLAG_RD,
-	&ipintrq.ifq_drops, 0, "");
+    &ipintrq.ifq_drops, 0, "Number of packets dropped from the IP input queue");
 
 struct ipstat ipstat;
 SYSCTL_STRUCT(_net_inet_ip, IPCTL_STATS, stats, CTLFLAG_RD,
-	&ipstat, ipstat, "");
+    &ipstat, ipstat, "IP statistics (struct ipstat, netinet/ip_var.h)");
 
 /* Packet reassembly stuff */
 #define IPREASS_NHASH_LOG2      6
@@ -134,7 +135,7 @@ static int    maxnipq;
 
 #ifdef IPCTL_DEFMTU
 SYSCTL_INT(_net_inet_ip, IPCTL_DEFMTU, mtu, CTLFLAG_RW,
-	&ip_mtu, 0, "");
+    &ip_mtu, 0, "Default MTU");
 #endif
 
 #ifdef IPSTEALTH
diff --git a/sys/netinet/raw_ip.c b/sys/netinet/raw_ip.c
index 571491d..f94cc09 100644
--- a/sys/netinet/raw_ip.c
+++ b/sys/netinet/raw_ip.c
@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)raw_ip.c	8.7 (Berkeley) 5/15/95
- *	$Id: raw_ip.c,v 1.57 1999/04/20 13:32:06 peter Exp $
+ *	$Id: raw_ip.c,v 1.58 1999/04/27 11:17:36 phk Exp $
  */
 
 #include <sys/param.h>
@@ -413,10 +413,10 @@ rip_ctlinput(cmd, sa, vip)
 static u_long	rip_sendspace = RIPSNDQ;
 static u_long	rip_recvspace = RIPRCVQ;
 
-SYSCTL_INT(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW, &rip_sendspace,
-	   0, "");
-SYSCTL_INT(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW, &rip_recvspace,
-	   0, "");
+SYSCTL_INT(_net_inet_raw, OID_AUTO, maxdgram, CTLFLAG_RW, 
+    &rip_sendspace, 0, "Maximum outgoing raw IP datagram size");
+SYSCTL_INT(_net_inet_raw, OID_AUTO, recvspace, CTLFLAG_RW, 
+    &rip_recvspace, 0, "Maximum incoming raw IP datagram size");
 
 static int
 rip_attach(struct socket *so, int proto, struct proc *p)
diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c
index 12f29e1..b155c1d 100644
--- a/sys/netinet/tcp_input.c
+++ b/sys/netinet/tcp_input.c
@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)tcp_input.c	8.12 (Berkeley) 5/24/95
- *	$Id: tcp_input.c,v 1.83 1999/01/27 22:42:25 dillon Exp $
+ *	$Id: tcp_input.c,v 1.84 1999/02/06 00:47:45 fenner Exp $
  */
 
 #include "opt_ipfw.h"		/* for ipfw_fwd		*/
@@ -77,16 +77,17 @@ tcp_seq	tcp_iss;
 tcp_cc	tcp_ccgen;
 
 struct	tcpstat tcpstat;
-SYSCTL_STRUCT(_net_inet_tcp, TCPCTL_STATS, stats,
-	CTLFLAG_RD, &tcpstat , tcpstat, "");
+SYSCTL_STRUCT(_net_inet_tcp, TCPCTL_STATS, stats, CTLFLAG_RD, 
+    &tcpstat , tcpstat, "TCP statistics (struct tcpstat, netinet/tcp_var.h)");
 
 static int log_in_vain = 0;
 SYSCTL_INT(_net_inet_tcp, OID_AUTO, log_in_vain, CTLFLAG_RW, 
-	&log_in_vain, 0, "");
+    &log_in_vain, 0, "Log all incoming TCP connections");
 
 int tcp_delack_enabled = 1;
 SYSCTL_INT(_net_inet_tcp, OID_AUTO, delayed_ack, CTLFLAG_RW, 
-	&tcp_delack_enabled, 0, "");
+    &tcp_delack_enabled, 0, 
+    "Delay ACK to try and piggyback it onto a data packet");
 
 u_long	tcp_now;
 struct inpcbhead tcb;
diff --git a/sys/netinet/tcp_reass.c b/sys/netinet/tcp_reass.c
index 12f29e1..b155c1d 100644
--- a/sys/netinet/tcp_reass.c
+++ b/sys/netinet/tcp_reass.c
@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)tcp_input.c	8.12 (Berkeley) 5/24/95
- *	$Id: tcp_input.c,v 1.83 1999/01/27 22:42:25 dillon Exp $
+ *	$Id: tcp_input.c,v 1.84 1999/02/06 00:47:45 fenner Exp $
  */
 
 #include "opt_ipfw.h"		/* for ipfw_fwd		*/
@@ -77,16 +77,17 @@ tcp_seq	tcp_iss;
 tcp_cc	tcp_ccgen;
 
 struct	tcpstat tcpstat;
-SYSCTL_STRUCT(_net_inet_tcp, TCPCTL_STATS, stats,
-	CTLFLAG_RD, &tcpstat , tcpstat, "");
+SYSCTL_STRUCT(_net_inet_tcp, TCPCTL_STATS, stats, CTLFLAG_RD, 
+    &tcpstat , tcpstat, "TCP statistics (struct tcpstat, netinet/tcp_var.h)");
 
 static int log_in_vain = 0;
 SYSCTL_INT(_net_inet_tcp, OID_AUTO, log_in_vain, CTLFLAG_RW, 
-	&log_in_vain, 0, "");
+    &log_in_vain, 0, "Log all incoming TCP connections");
 
 int tcp_delack_enabled = 1;
 SYSCTL_INT(_net_inet_tcp, OID_AUTO, delayed_ack, CTLFLAG_RW, 
-	&tcp_delack_enabled, 0, "");
+    &tcp_delack_enabled, 0, 
+    "Delay ACK to try and piggyback it onto a data packet");
 
 u_long	tcp_now;
 struct inpcbhead tcb;
diff --git a/sys/netinet/tcp_subr.c b/sys/netinet/tcp_subr.c
index ed0acd4..8858b18 100644
--- a/sys/netinet/tcp_subr.c
+++ b/sys/netinet/tcp_subr.c
@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)tcp_subr.c	8.2 (Berkeley) 5/24/95
- *	$Id: tcp_subr.c,v 1.52 1999/02/04 03:27:43 msmith Exp $
+ *	$Id: tcp_subr.c,v 1.53 1999/04/28 11:37:49 phk Exp $
  */
 
 #include "opt_compat.h"
@@ -70,23 +70,23 @@
 #endif
 
 int 	tcp_mssdflt = TCP_MSS;
-SYSCTL_INT(_net_inet_tcp, TCPCTL_MSSDFLT, mssdflt,
-	CTLFLAG_RW, &tcp_mssdflt , 0, "");
+SYSCTL_INT(_net_inet_tcp, TCPCTL_MSSDFLT, mssdflt, CTLFLAG_RW, 
+    &tcp_mssdflt , 0, "Default TCP Maximum Segment Size");
 
 static int 	tcp_rttdflt = TCPTV_SRTTDFLT / PR_SLOWHZ;
-SYSCTL_INT(_net_inet_tcp, TCPCTL_RTTDFLT, rttdflt,
-	CTLFLAG_RW, &tcp_rttdflt , 0, "");
+SYSCTL_INT(_net_inet_tcp, TCPCTL_RTTDFLT, rttdflt, CTLFLAG_RW, 
+    &tcp_rttdflt , 0, "Default maximum TCP Round Trip Time");
 
 static int	tcp_do_rfc1323 = 1;
-SYSCTL_INT(_net_inet_tcp, TCPCTL_DO_RFC1323, rfc1323,
-	CTLFLAG_RW, &tcp_do_rfc1323 , 0, "");
+SYSCTL_INT(_net_inet_tcp, TCPCTL_DO_RFC1323, rfc1323, CTLFLAG_RW, 
+    &tcp_do_rfc1323 , 0, "Enable rfc1323 (high performance TCP) extensions");
 
 static int	tcp_do_rfc1644 = 0;
-SYSCTL_INT(_net_inet_tcp, TCPCTL_DO_RFC1644, rfc1644,
-	CTLFLAG_RW, &tcp_do_rfc1644 , 0, "");
+SYSCTL_INT(_net_inet_tcp, TCPCTL_DO_RFC1644, rfc1644, CTLFLAG_RW, 
+    &tcp_do_rfc1644 , 0, "Enable rfc1644 (TTCP) extensions");
 
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, pcbcount, CTLFLAG_RD, &tcbinfo.ipi_count,
-	   0, "Number of active PCBs");
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, pcbcount, CTLFLAG_RD, 
+    &tcbinfo.ipi_count, 0, "Number of active PCBs");
 
 static void	tcp_cleartaocache __P((void));
 static void	tcp_notify __P((struct inpcb *, int));
diff --git a/sys/netinet/tcp_timer.c b/sys/netinet/tcp_timer.c
index 112ce57..00746a5 100644
--- a/sys/netinet/tcp_timer.c
+++ b/sys/netinet/tcp_timer.c
@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)tcp_timer.c	8.2 (Berkeley) 5/24/95
- *	$Id: tcp_timer.c,v 1.27 1998/04/06 06:52:46 phk Exp $
+ *	$Id: tcp_timer.c,v 1.28 1998/04/24 09:25:35 dg Exp $
  */
 
 #include "opt_compat.h"
@@ -76,8 +76,8 @@ SYSCTL_INT(_net_inet_tcp, TCPCTL_KEEPINTVL, keepintvl,
 	CTLFLAG_RW, &tcp_keepintvl , 0, "");
 
 static int	always_keepalive = 0;
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, always_keepalive,
-	CTLFLAG_RW, &always_keepalive , 0, "");
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, always_keepalive, CTLFLAG_RW, 
+    &always_keepalive , 0, "Assume SO_KEEPALIVE on all TCP connections");
 
 static int	tcp_keepcnt = TCPTV_KEEPCNT;
 	/* max idle probes */
diff --git a/sys/netinet/tcp_timewait.c b/sys/netinet/tcp_timewait.c
index ed0acd4..8858b18 100644
--- a/sys/netinet/tcp_timewait.c
+++ b/sys/netinet/tcp_timewait.c
@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)tcp_subr.c	8.2 (Berkeley) 5/24/95
- *	$Id: tcp_subr.c,v 1.52 1999/02/04 03:27:43 msmith Exp $
+ *	$Id: tcp_subr.c,v 1.53 1999/04/28 11:37:49 phk Exp $
  */
 
 #include "opt_compat.h"
@@ -70,23 +70,23 @@
 #endif
 
 int 	tcp_mssdflt = TCP_MSS;
-SYSCTL_INT(_net_inet_tcp, TCPCTL_MSSDFLT, mssdflt,
-	CTLFLAG_RW, &tcp_mssdflt , 0, "");
+SYSCTL_INT(_net_inet_tcp, TCPCTL_MSSDFLT, mssdflt, CTLFLAG_RW, 
+    &tcp_mssdflt , 0, "Default TCP Maximum Segment Size");
 
 static int 	tcp_rttdflt = TCPTV_SRTTDFLT / PR_SLOWHZ;
-SYSCTL_INT(_net_inet_tcp, TCPCTL_RTTDFLT, rttdflt,
-	CTLFLAG_RW, &tcp_rttdflt , 0, "");
+SYSCTL_INT(_net_inet_tcp, TCPCTL_RTTDFLT, rttdflt, CTLFLAG_RW, 
+    &tcp_rttdflt , 0, "Default maximum TCP Round Trip Time");
 
 static int	tcp_do_rfc1323 = 1;
-SYSCTL_INT(_net_inet_tcp, TCPCTL_DO_RFC1323, rfc1323,
-	CTLFLAG_RW, &tcp_do_rfc1323 , 0, "");
+SYSCTL_INT(_net_inet_tcp, TCPCTL_DO_RFC1323, rfc1323, CTLFLAG_RW, 
+    &tcp_do_rfc1323 , 0, "Enable rfc1323 (high performance TCP) extensions");
 
 static int	tcp_do_rfc1644 = 0;
-SYSCTL_INT(_net_inet_tcp, TCPCTL_DO_RFC1644, rfc1644,
-	CTLFLAG_RW, &tcp_do_rfc1644 , 0, "");
+SYSCTL_INT(_net_inet_tcp, TCPCTL_DO_RFC1644, rfc1644, CTLFLAG_RW, 
+    &tcp_do_rfc1644 , 0, "Enable rfc1644 (TTCP) extensions");
 
-SYSCTL_INT(_net_inet_tcp, OID_AUTO, pcbcount, CTLFLAG_RD, &tcbinfo.ipi_count,
-	   0, "Number of active PCBs");
+SYSCTL_INT(_net_inet_tcp, OID_AUTO, pcbcount, CTLFLAG_RD, 
+    &tcbinfo.ipi_count, 0, "Number of active PCBs");
 
 static void	tcp_cleartaocache __P((void));
 static void	tcp_notify __P((struct inpcb *, int));
diff --git a/sys/netinet/tcp_usrreq.c b/sys/netinet/tcp_usrreq.c
index 02a281f..223c8d5 100644
--- a/sys/netinet/tcp_usrreq.c
+++ b/sys/netinet/tcp_usrreq.c
@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	From: @(#)tcp_usrreq.c	8.2 (Berkeley) 1/3/94
- *	$Id: tcp_usrreq.c,v 1.41 1999/04/24 18:25:35 ache Exp $
+ *	$Id: tcp_usrreq.c,v 1.42 1999/04/28 11:37:50 phk Exp $
  */
 
 #include "opt_tcpdebug.h"
@@ -679,11 +679,11 @@ tcp_ctloutput(so, sopt)
  * be set by the route).
  */
 u_long	tcp_sendspace = 1024*16;
-SYSCTL_INT(_net_inet_tcp, TCPCTL_SENDSPACE, sendspace,
-	CTLFLAG_RW, &tcp_sendspace , 0, "");
+SYSCTL_INT(_net_inet_tcp, TCPCTL_SENDSPACE, sendspace, CTLFLAG_RW, 
+    &tcp_sendspace , 0, "Maximum outgoing TCP datagram size");
 u_long	tcp_recvspace = 1024*16;
-SYSCTL_INT(_net_inet_tcp, TCPCTL_RECVSPACE, recvspace,
-	CTLFLAG_RW, &tcp_recvspace , 0, "");
+SYSCTL_INT(_net_inet_tcp, TCPCTL_RECVSPACE, recvspace, CTLFLAG_RW, 
+    &tcp_recvspace , 0, "Maximum incoming TCP datagram size");
 
 /*
  * Attach TCP protocol to socket, allocating
diff --git a/sys/netinet/udp_usrreq.c b/sys/netinet/udp_usrreq.c
index 7fc09d2c..b0d293c 100644
--- a/sys/netinet/udp_usrreq.c
+++ b/sys/netinet/udp_usrreq.c
@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	@(#)udp_usrreq.c	8.6 (Berkeley) 5/23/95
- *	$Id: udp_usrreq.c,v 1.49 1998/12/03 20:23:21 dillon Exp $
+ *	$Id: udp_usrreq.c,v 1.50 1999/04/28 11:37:51 phk Exp $
  */
 
 #include <sys/param.h>
@@ -75,7 +75,7 @@ SYSCTL_INT(_net_inet_udp, UDPCTL_CHECKSUM, checksum, CTLFLAG_RW,
 
 static int log_in_vain = 0;
 SYSCTL_INT(_net_inet_udp, OID_AUTO, log_in_vain, CTLFLAG_RW, 
-	&log_in_vain, 0, "");
+    &log_in_vain, 0, "Log all incoming UDP packets");
 
 static struct	inpcbhead udb;		/* from udp_var.h */
 static struct	inpcbinfo udbinfo;
@@ -86,7 +86,7 @@ static struct	inpcbinfo udbinfo;
 
 static struct	udpstat udpstat;	/* from udp_var.h */
 SYSCTL_STRUCT(_net_inet_udp, UDPCTL_STATS, stats, CTLFLAG_RD,
-	&udpstat, udpstat, "");
+    &udpstat, udpstat, "UDP statistics (struct udpstat, netinet/udp_var.h)");
 
 static struct	sockaddr_in udp_in = { sizeof(udp_in), AF_INET };
 
@@ -553,11 +553,11 @@ release:
 static u_long	udp_sendspace = 9216;		/* really max datagram size */
 					/* 40 1K datagrams */
 SYSCTL_INT(_net_inet_udp, UDPCTL_MAXDGRAM, maxdgram, CTLFLAG_RW,
-	&udp_sendspace, 0, "");
+    &udp_sendspace, 0, "Maximum outgoing UDP datagram size");
 
 static u_long	udp_recvspace = 40 * (1024 + sizeof(struct sockaddr_in));
 SYSCTL_INT(_net_inet_udp, UDPCTL_RECVSPACE, recvspace, CTLFLAG_RW,
-	&udp_recvspace, 0, "");
+    &udp_recvspace, 0, "Maximum incoming UDP datagram size");
 
 static int
 udp_abort(struct socket *so)