implement sysctls to report IP, TCP, UDP, and ICMP statistics and

change netstat to use them instead of accessing kvm for it. more
protocols will be added later.

discussed with deraadt@ claudio@ gilles@
ok deraadt@

1 files changed, 14 insertions, 2 deletions

diff --git a/lib/libc/gen/sysctl.3 b/lib/libc/gen/sysctl.3
index 73f7efe7888..125814d387a 100644
--- a/lib/libc/gen/sysctl.3
+++ b/lib/libc/gen/sysctl.3
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: sysctl.3,v 1.175 2007/09/25 16:12:27 jmc Exp $
+.\"	$OpenBSD: sysctl.3,v 1.176 2007/12/13 20:00:53 reyk Exp $
 .\"
 .\" Copyright (c) 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -27,7 +27,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd $Mdocdate: September 25 2007 $
+.Dd $Mdocdate: December 13 2007 $
 .Dt SYSCTL 3
 .Os
 .Sh NAME
@@ -1095,6 +1095,7 @@ The currently defined protocols and names are:
 .It icmp	maskrepl	integer	yes
 .It icmp	rediraccept	integer	yes
 .It icmp	redirtimeout	integer	yes
+.It icmp	stats	structure	no
 .It icmp	tstamprepl	integer	yes
 .It ip	directed-broadcast	integer	yes
 .It ip	encdebug	integer	yes
@@ -1124,6 +1125,7 @@ The currently defined protocols and names are:
 .It ip	portlast	integer	yes
 .It ip	redirect	integer	yes
 .It ip	sourceroute	integer	yes
+.It ip	stats	structure	no
 .It ip	ttl	integer	yes
 .It ipcomp	enable	integer	yes
 .It ipip	allow	integer	yes
@@ -1144,12 +1146,14 @@ The currently defined protocols and names are:
 .It tcp	sack	integer	yes
 .It tcp	sendspace	integer	yes
 .It tcp	slowhz	integer	no
+.It tcp	stats	structure	no
 .It tcp	synbucketlimit	integer	yes
 .It tcp	syncachelimit	integer	yes
 .It udp	baddynamic	array	yes
 .It udp	checksum	integer	yes
 .It udp	recvspace	integer	yes
 .It udp	sendspace	integer	yes
+.It udp	stats	structure	no
 .El
 .Pp
 The variables are as follows:
@@ -1248,6 +1252,8 @@ and the variable is meaningful on IP hosts only.
 This variable specifies the lifetime of routing entries generated by incoming
 ICMP redirects.
 The default timeout is 10 minutes.
+.It Li icmp.stats
+Returns the ICMP statistics in a struct icmpstat.
 .It Li icmp.tstamprepl
 If set to 1, reply to ICMP timestamp requests.
 If set to 0, ignore timestamp requests.
@@ -1434,6 +1440,8 @@ the host.
 As detailed in
 .Xr securelevel 7 ,
 this variable may not be changed if the securelevel is \*(Gt 0.
+.It Li ip.stats
+Returns the IP statistics in a struct ipstat.
 .It Li ip.ttl
 The maximum time-to-live (hop count) value for an
 .Tn IP
@@ -1527,6 +1535,8 @@ The units for tcp.keepidle and tcp.keepintvl; those variables are in ticks
 of a clock that ticks tcp.slowhz times per second.
 (That is, their values must be divided by the tcp.slowhz value to get times
 in seconds.)
+.It Li tcp.stats
+Returns the TCP statistics in a struct tcpstat.
 .It Li tcp.synbucketlimit
 The maximum number of entries allowed per hash bucket in the TCP SYN cache.
 .It Li tcp.syncachelimit
@@ -1552,6 +1562,8 @@ receive buffer size.
 Returns the default
 .Tn UDP
 send buffer size.
+.It Li udp.stats
+Returns the UDP statistics in a struct udpstat.
 .El
 .It Dv PF_INET6
 Get or set various global information about IPv6