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Index: sys/netinet6/in6_proto.c
===================================================================
--- sys/netinet6/in6_proto.c
+++ sys/netinet6/in6_proto.c
@@ -517,15 +517,23 @@
}
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding,
- CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_forwarding), 0, "");
+ CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_forwarding), 0,
+ "Enable forwarding of IPv6 packets between interfaces.");
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect,
- CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_sendredirects), 0, "");
+ CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_sendredirects), 0,
+ "Enable sending of ICMPv6 redirects in response to unforwardable IPv6"
+ " packets. This option is ignored unless the node is routing IPv6"
+ " packets.");
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, hlim, CTLFLAG_VNET | CTLFLAG_RW,
- &VNET_NAME(ip6_defhlim), 0, "");
+ &VNET_NAME(ip6_defhlim), 0,
+ "Default hop limit to use for outgoing IPv6 packets.");
SYSCTL_VNET_PCPUSTAT(_net_inet6_ip6, IPV6CTL_STATS, stats, struct ip6stat,
ip6stat, "IP6 statistics (struct ip6stat, netinet6/ip6_var.h)");
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS, maxfragpackets,
- CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_maxfragpackets), 0, "");
+ CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_maxfragpackets), 0,
+ "Default number of fragmented packets this node will accept."
+ " A value of 0 means no fragmented packets will be accepted, while a"
+ " value of -1 means no limit.");
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv,
CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_accept_rtadv), 0,
"Default value of per-interface flag for accepting ICMPv6 Router"
@@ -544,21 +552,33 @@
"Accept the default router list from ICMPv6 RA messages even "
"when packet forwarding enabled.");
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, log_interval,
- CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0, "");
+ CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0,
+ "Default interval in seconds between IPv6 packet forwarding engine log"
+ " output.");
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit,
- CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0, "");
+ CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0,
+ "Default maximum number of IPv6 extension headers permitted on"
+ " incoming IPv6 packets. A value of 0 means no artificial limit.");
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count,
- CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_dad_count), 0, "");
+ CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_dad_count), 0,
+ "Default number of IPv6 DAD (duplicated address detection) probe packets.");
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel,
- CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0, "");
+ CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0,
+ "Enable/disable automatic filling of the IPv6 flowlabel field.");
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim,
- CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0, "");
+ CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0,
+ "Default hop limit for an IPv6 multicast packet originating from this"
+ " node.");
SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, kame_version,
- CTLFLAG_RD, __KAME_VERSION, 0, "");
+ CTLFLAG_RD, __KAME_VERSION, 0,
+ "Identify the version of this node's KAME IPv6 stack.");
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated,
- CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0, "");
+ CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0,
+ "Enable use of deprecated addresses specified in RFC2462 5.5.4.");
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, rr_prune,
- CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rr_prune), 0, "");
+ CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_rr_prune), 0,
+ "Default interval in seconds for babysitting of IPv6 router prefix"
+ " renumbering.");
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr,
CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_use_tempaddr), 0, "");
SYSCTL_PROC(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
@@ -570,7 +590,9 @@
&VNET_NAME(ip6_temp_valid_lifetime), 0,
sysctl_ip6_tempvltime, "I", "");
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, v6only,
- CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_v6only), 0, "");
+ CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_v6only), 0,
+ "Restrict sockets listening on the wildcard address [::] to IPv6"
+ " addresses.");
SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal,
CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_auto_linklocal), 0,
"Default value of per-interface flag for automatically adding an IPv6"

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