add description for PF_INET6 (net.inet6.*).

1 files changed, 145 insertions, 4 deletions

diff --git a/lib/libc/gen/sysctl.3 b/lib/libc/gen/sysctl.3
index 0b9be1af9dd..d77c24b8b4f 100644
--- a/lib/libc/gen/sysctl.3
+++ b/lib/libc/gen/sysctl.3
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: sysctl.3,v 1.31 1999/12/30 20:56:28 provos Exp $
+.\"	$OpenBSD: sysctl.3,v 1.32 2000/01/02 13:42:36 itojun Exp $
 .\"
 .\" Copyright (c) 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -475,7 +475,8 @@ privileges may change the value.
 .Bl -column "Second level nameXXXXXX" "routing messagesXXX" -offset indent
 .It Sy Second level name	Type	Changeable
 .It Dv PF_ROUTE No "	routing messages	no"
-.It Dv PF_INET No "	internet values	yes"
+.It Dv PF_INET No "	IPv4 values	yes"
+.It Dv PF_INET6 No "	IPv6 values	yes"
 .It Dv PF_ENCAP No "	IPsec values	yes"
 .El
 .Pp
@@ -519,7 +520,8 @@ The fifth and sixth level names are as follows:
 .It Dv NET_RT_IFLIST No "	None"
 .El
 .It Dv PF_INET
-Get or set various global information about the internet protocols.
+Get or set various global information about IPv4
+.Pq Internet Protocol version 4 .
 The third level name is the protocol.
 The fourth level name is the variable name.
 The currently defined protocols and names are:
@@ -628,6 +630,139 @@ but for
 .Tn UDP
 sockets.
 .El
+.It Dv PF_INET6
+Get or set various global information about IPv6
+.Pq Internet Protocol version 6 .
+The third level name is the protocol.
+The fourth level name is the variable name.
+The currently defined protocols and names are:
+.Bl -column "Protocol name" "Variable nameXX" "integer" "yes" -offset indent
+.It Pa Protocol name	Variable name	Type	Changeable
+.It ip6	forwarding	integer	yes
+.It ip6	redirect	integer	yes
+.It ip6	hlim	integer	yes
+.It ip6	maxfragpackets	integer	yes
+.It ip6	accept_rtadv	integer	yes
+.It ip6	keepfaith	integer	yes
+.It ip6	log_interval	integer	yes
+.It ip6	hdrnestlimit	integer	yes
+.It ip6	dad_count	integer	yes
+.It ip6	auto_flowlabel	integer	yes
+.It ip6	defmcasthlim	integer	yes
+.It ip6	gif_hlim	integer	yes
+.It ip6	kame_version	string	no
+.It icmp6	rediraccept	integer	yes
+.It icmp6	redirtimeout	integer	yes
+.It icmp6	errratelimit	integer	yes
+.It icmp6	nd6_prune	integer	yes
+.It icmp6	nd6_delay	integer	yes
+.It icmp6	nd6_umaxtries	integer	yes
+.It icmp6	nd6_mmaxtries	integer	yes
+.It icmp6	nd6_useloopback	integer	yes
+.It icmp6	nd6_proxyall	integer	yes
+.It icmp6	nodeinfo	integer	yes
+.El
+.Pp
+The variables are as follows:
+.Bl -tag -width "123456"
+.It Li ip6.forwarding
+Returns 1 when IPv6 forwarding is enabled for the node,
+meaning that the node is acting as a router.
+.It Li ip6.redirect
+Returns 1 when ICMPv6 redirects may be sent by the node.
+This option is ignored unless the node is routing IP packets,
+and should normally be enabled on all systems.
+.It Li ip6.hlim
+The default hop limit value for an IPv6 unicast packet sourced by the node.
+This value applies to all the transport protocols on top of IPv6.
+There are APIs to override the value, as documented in
+.Xr ip6 4 .
+.It Li ip6.maxfragpackets
+The maximum number of fragmented packets the node will accept.
+0 means that the node will not accept any fragmented packets.
+-1 means that the node will accept as many fragmented packets as it receives.
+The flag is provided basically for avoiding possible DoS attacks.
+.It Li ip6.accept_rtadv
+If set to non-zero, the node will accept ICMPv6 router advertisement packets
+and autoconfigures address prefixes and default routers.
+The node must be a host
+.Pq not a router
+for the option to be meaningful.
+.It Li ip6.keepfaith
+If set to non-zero, it enables
+.Dq FAITH
+TCP relay IPv6-to-IPv4 translator code in the kernel.
+Refer
+.Xr faith 4
+and
+.Xr faithd 8
+for detail.
+.It Li ip6.log_interval
+The variable controls amount of logs generated by IPv6 packet
+forwarding engine, by seting interval between log output
+.Pq in seconds .
+.It Li ip6.hdrnestlimit
+The number of IPv6 extension headers permitted on incoming IPv6 packets.
+If set to 0, the node will accept as many extension headers as possible.
+.It Li ip6.dad_count
+The variable cofigures number of IPv6 DAD
+.Pq duplicated address detection
+probe packets.
+The packets will be generated when IPv6 interface addresses are configured.
+.It Li ip6.auto_flowlabel
+On connected transport protocol packets,
+fill IPv6 flowlabel field to help intermediate routers to identify packet flows.
+.It Li ip6.defmcasthlim
+The default hop limit value for an IPv6 multicast packet sourced by the node.
+This value applies to all the transport protocols on top of IPv6.
+There are APIs to override the value, as documented in
+.Xr ip6 4 .
+.It Li ip6.gif_hlim
+The maximum hop limit value for an IPv6 packet generated by
+.Xr gif 4
+tunnel interface.
+.It Li ip6.kame_version
+The string identifies the version of KAME IPv6 stack implemented in the kernel.
+.It Li icmp6.rediraccept
+If set to non-zero, the host will accept ICMPv6 redirect packets.
+Note that IPv6 routers will never accept ICMPv6 redirect packets,
+and the variable is meaningful on IPv6 hosts
+.Pq non-router
+only.
+.It Li icmp6.redirtimeout
+The variable specifies lifetime of routing entries generated by incoming
+ICMPv6 redirect.
+.It Li icmp6.errratelimit
+The variable specifies interval between ICMPv6 error messages,
+in microseconds.
+.It Li icmp6.nd6_prune
+The variable specifies interval between IPv6 neighbor cache babysitting,
+in seconds.
+.It Li icmp6.nd6_delay
+The variable specifies
+.Dv DELAY_FIRST_PROBE_TIME
+timing constant in IPv6 neighbor discovery specification
+.Pq RFC2461 ,
+in seconds.
+.It Li icmp6.nd6_umaxtries
+The variable specifies
+.Dv MAX_UNICAST_SOLICIT
+constant in IPv6 neighbor discovery specification
+.Pq RFC2461 .
+.It Li icmp6.nd6_mmaxtries
+The variable specifies
+.Dv MAX_MULTICAST_SOLICIT
+constant in IPv6 neighbor discovery specification
+.Pq RFC2461 .
+.It Li icmp6.nd6_useloopback
+If set to non-zero, kernel IPv6 stack will use loopback interface for
+local traffic.
+.It Li icmp6.nd6_proxyall
+The variable enables proxy neighbor advertisements.
+.It Li icmp6.nodeinfo
+The variable enables, or disables, kernel support for
+ICMPv6 node information query/reply.
+.El
 .El
 .Ss CTL_USER
 The string and integer information available for the
@@ -815,14 +950,20 @@ definitions for third level profiling identifiers
 .It Aq Pa vm/vm_param.h
 definitions for second level virtual memory identifiers
 .It Aq Pa netinet/in.h
-definitions for third level Internet identifiers and
+definitions for third level IPv4/v6 identifiers and
 fourth level
 .Tn IP
+and
+.Tn IPv6
 identifiers
 .It Aq Pa netinet/icmp_var.h
 definitions for fourth level
 .Tn ICMP
 identifiers
+.It Aq Pa netinet/icmp6.h
+definitions for fourth level
+.Tn ICMPv6
+identifiers
 .It Aq Pa netinet/tcp_var.h
 definitions for fourth level
 .Tn TCP