Author: markj
Date: Mon Jan 16 19:35:19 2017
New Revision: 312307
URL: https://svnweb.freebsd.org/changeset/base/312307

Log:
  Improve some of the sysctl descriptions added in r299827.
  
  Submitted by: Marie Helene Kvello-Aune <[email protected]>
                (original version)
  MFC after:    1 week
  Differential Revision:        https://reviews.freebsd.org/D5336

Modified:
  head/sys/netinet6/in6_proto.c

Modified: head/sys/netinet6/in6_proto.c
==============================================================================
--- head/sys/netinet6/in6_proto.c       Mon Jan 16 19:04:57 2017        
(r312306)
+++ head/sys/netinet6/in6_proto.c       Mon Jan 16 19:35:19 2017        
(r312307)
@@ -507,19 +507,21 @@ sysctl_ip6_tempvltime(SYSCTL_HANDLER_ARG
 
 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding,
        CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_forwarding), 0,
-       "Enable IPv6 forwarding between interfaces");
+       "Enable forwarding of IPv6 packets between interfaces");
 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect,
        CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_sendredirects), 0,
-       "Send a redirect message when forwarding back to a source link");
+       "Send ICMPv6 redirects for unforwardable IPv6 packets");
 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, hlim,
        CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defhlim), 0,
-       "Default hop limit");
+       "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,
-       "Maximum allowed number of outstanding fragmented IPv6 packets");
+       "Default maximum number of outstanding fragmented IPv6 packets. "
+       "A value of 0 means no fragmented packets will be accepted, while a "
+       "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 RA messages");
@@ -541,7 +543,8 @@ SYSCTL_INT(_net_inet6_ip6, IPV6CTL_LOG_I
        "Frequency in seconds at which to log IPv6 forwarding errors");
 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit,
        CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0,
-       "Maximum allowed number of nested protocol headers");
+       "Default maximum number of IPv6 extension headers permitted on "
+       "incoming IPv6 packets, 0 for no artificial limit");
 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count,
        CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_dad_count), 0,
        "Number of ICMPv6 NS messages sent during duplicate address detection");
@@ -550,7 +553,8 @@ SYSCTL_INT(_net_inet6_ip6, IPV6CTL_AUTO_
        "Provide an IPv6 flowlabel in outbound packets");
 SYSCTL_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim,
        CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0,
-       "Default hop limit for multicast packets");
+       "Default hop limit for IPv6 multicast packets originating from this "
+       "node");
 SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, kame_version,
        CTLFLAG_RD, __KAME_VERSION, 0,
        "KAME version string");
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