Date: Fri, 30 Nov 2012 22:20:24 -0800 (PST) From: Garrett Cooper <yanegomi@gmail.com> To: bruce@toaster.local Cc: freebsd-net@FreeBSD.org Subject: Re: [RFC] Better document net.inet6 sysctls and prune dead sysctls (fwd) Message-ID: <alpine.BSF.2.00.1211302204460.57210@toaster.local>
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On Tue, 27 Nov 2012, Bruce Evans wrote:
> On Mon, 26 Nov 2012, Garrett Cooper wrote:
>
>> As noted in a previous thread, I set out to better document the
>> net.inet6 sysctls after having to tweak the knobs to get things to work for
>> TAHI, and this is the resulting draft (so far). I also took the liberty of
>> removing the ip6_rr_prune and icmp6_redirtimeout sysctls because they
>> weren't in use anywhere else in the sys/... portion of the tree. I was
>> wondering if there are any points that should be corrected/clarified before
>> I submit a PR with the resulting patch.
>
> It would be good to fix the style bugs when changing lots.
>
>> Index: sys/netinet6/in6_proto.c
>> ===================================================================
>> --- sys/netinet6/in6_proto.c (revision 242903)
>> +++ sys/netinet6/in6_proto.c (working copy)
>> @@ -443,7 +441,6 @@
>>
>> /* ICMPV6 parameters */
>> VNET_DEFINE(int, icmp6_rediraccept) = 1;/* accept and process redirects */
>> -VNET_DEFINE(int, icmp6_redirtimeout) = 10 * 60; /* 10 minutes */
>> VNET_DEFINE(int, icmp6errppslim) = 100; /* 100pps */
>> /* control how to respond to NI queries */
>> VNET_DEFINE(int, icmp6_nodeinfo) =
>> @@ -515,15 +512,20 @@
>> }
>>
>> SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding, CTLFLAG_RW,
>> - &VNET_NAME(ip6_forwarding), 0, "");
>> + &VNET_NAME(ip6_forwarding), 0,
>> + "Forward IPv6 packets via node.");
>
> All the sysctl names spell ipv6 without a v. This is hard to fix. This
> bug is missing in the names of the sysctl numbers, but it is a bug to
> used named numbers instead of OID_AUTO in code newer than OID_AUTO, and
> ipv6 is much newer.
>
> New style bug in almost every description. Sysctl descriptions are not
> normally terminated by a ".".
>
> Old style bug in almost every ipv6 sysctl. Large SYSCTL declarations are
> normally normally-indented, with 4-space continuation indents. This rule
> is broken farily consistenly in ipv6 sysctl. More ivp4 SYSCTL descriptions
> are actually formatted normally.
>
>> @@ -594,35 +613,45 @@
>> #define V_ip6_output_flowtable_size VNET(ip6_output_flowtable_size)
>>
>> SYSCTL_VNET_INT(_net_inet6_ip6, OID_AUTO, output_flowtable_size,
>> CTLFLAG_RDTUN,
>> - &VNET_NAME(ip6_output_flowtable_size), 2048,
>> - "number of entries in the per-cpu output flow caches");
>> + &VNET_NAME(ip6_output_flowtable_size), 2048,
>> + "number of entries in the per-cpu output flow caches");
>> ...
>
> Here the formatting change is backwards (from normal continuation indent
> to abnormal ipv6 continuation indent.
>
> This and some other old sysctl descriptions have differnent style bugs:
> they are normally terminated (not with a '.'), but are not normally
> capitalized (with capaitals).
>
>> SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune,
>> CTLFLAG_RW,
>
> Some mailer mangled the formatting (the line isn't too long and shouldn't
> have been mangled).
>
>> - &VNET_NAME(nd6_prune), 0, "");
>> + &VNET_NAME(nd6_prune), 0,
>> + "Period (in seconds) for performing nd6 expiration checks of default "
>
> More mangling by some mailer.
>
>> + "routes and prefix lists");
>
> However, the string is too long. The message is obfuscated by splitting it.
> This keeps the line length short in the source code, but it is still too
> long in the output. Sysctl descriptions should be no longer than 50 or
> 60 characters, since the sysctl name will expand the output by 20 or 30
> characters. sysctl names longer than 20 or 30 are a larger bug, since
> they are hard to write as well as hard to read.
>
> This sysctl description is normally terminated (not with a ".").
>
>> ...
>> SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries,
>> - CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0, "");
>> + CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0,
>> + "Maximum number of unicast queries to perform via nd6.");
>
> Another type of sysctl misformatting is generated by names that are so
> verbose that CTLFLAG* cannot be formatted normally (on the first line).
>
> I missed earlier instances of these bugs.
>
> Statistic on output style in sysctl descriptions: on freefall now:
> sysctl -da: 3546 lines
> sysctl -da | grep -v ': *$': 3192 lines
> [this filters out sysctls with null descriptions. The output is
> misformatted with a space before the null description]
> sysctl -nda: 3546 lines
> sysctl -nda | grep -v '^: *$': 3192 lines
> [since this 3192 is the same as the number of sysctls with non-null
> descreiptions, there must be no multi-line descriptions with embedded
> newlines]
> sysctl -nda | grep -v '^: *$' | grep -v '^[A-Z]':
> 1555 lines
> [most of non-capitalizations are style bugs. The last 1395 of them
> are automatically generated for device sysctls. This is part of 5
> lines of automatically generated spam for device sysctls (descriptions
> are duplicated ad spamium for %desc, %driver, %location, %pnpinfo and
> %parent). A few are correct because they are for a proper name or
> keyword or a number]
> sysctl -nda | grep -v '^: *$' | grep '\.$':
> 74 lines
> [the style bug of terminating with a '.' is uncommon. In a few cases
> it goes with the larger style bug of a multi-line description]
> sysctl -nda | grep -v '^: *$' | grep '.... [81 dots]':
> 11 lines
> [these lines are too long even without the sysctl names. Abnormal
> termination is denser than usual in these lines (8 of 11)]
> sysctl -nda | grep -v '^: *$' | grep '\..*\.':
> 8 lines
> [2 of these are for multi-sentence descriptions].
Bruce,
Is this better? I tried to be consistent about using v6 properly
when dealing with protocols in order to match what the IETF did and I
believe I properly integrated in your comments.
Thanks!
-Garrett
Index: sys/netinet6/in6_proto.c
===================================================================
--- sys/netinet6/in6_proto.c (revision 243557)
+++ sys/netinet6/in6_proto.c (working copy)
@@ -131,7 +131,7 @@
#endif
/*
- * TCP/IP protocol family: IP6, ICMP6, UDP, TCP.
+ * TCP/IP protocol family: IPv6, ICMPv6, UDPv6, TCPv6.
*/
FEATURE(inet6, "Internet Protocol version 6");
@@ -382,9 +382,9 @@
*/
#ifndef IPV6FORWARDING
#ifdef GATEWAY6
-#define IPV6FORWARDING 1 /* forward IP6 packets not for us */
+#define IPV6FORWARDING 1 /* forward IPv6 packets */
#else
-#define IPV6FORWARDING 0 /* don't forward IP6 packets not for us
*/
+#define IPV6FORWARDING 0 /* don't forward IPv6 packets */
#endif /* GATEWAY6 */
#endif /* !IPV6FORWARDING */
@@ -409,8 +409,6 @@
VNET_DEFINE(int, ip6_auto_flowlabel) = 1;
VNET_DEFINE(int, ip6_use_deprecated) = 1;/* allow deprecated addr
* (RFC2462 5.5.4) */
-VNET_DEFINE(int, ip6_rr_prune) = 5; /* router renumbering prefix
- * walk list every 5 sec. */
VNET_DEFINE(int, ip6_mcast_pmtu) = 0; /* enable pMTU discovery for multicast?
*/
VNET_DEFINE(int, ip6_v6only) = 1;
@@ -431,7 +429,7 @@
VNET_DEFINE(int, pmtu_expire) = 60*10;
VNET_DEFINE(int, pmtu_probe) = 60*2;
-/* raw IP6 parameters */
+/* raw IPV6 parameters */
/*
* Nominal space allocated to a raw ip socket.
*/
@@ -443,13 +441,12 @@
/* ICMPV6 parameters */
VNET_DEFINE(int, icmp6_rediraccept) = 1;/* accept and process redirects */
-VNET_DEFINE(int, icmp6_redirtimeout) = 10 * 60; /* 10 minutes */
VNET_DEFINE(int, icmp6errppslim) = 100; /* 100pps */
/* control how to respond to NI queries */
VNET_DEFINE(int, icmp6_nodeinfo) =
(ICMP6_NODEINFO_FQDNOK|ICMP6_NODEINFO_NODEADDROK);
-/* UDP on IP6 parameters */
+/* UDP on IPv6 parameters */
VNET_DEFINE(int, udp6_sendspace) = 9216;/* really max datagram size */
VNET_DEFINE(int, udp6_recvspace) = 40 * (1024 + sizeof(struct sockaddr_in6));
/* 40 1K datagrams */
@@ -461,12 +458,12 @@
"Internet6 Family");
/* net.inet6 */
-SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW, 0, "IP6");
-SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW, 0,
"ICMP6");
-SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW, 0,
"UDP6");
-SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW, 0,
"TCP6");
+SYSCTL_NODE(_net_inet6, IPPROTO_IPV6, ip6, CTLFLAG_RW, 0,
"IPv6");
+SYSCTL_NODE(_net_inet6, IPPROTO_ICMPV6, icmp6, CTLFLAG_RW, 0,
"ICMPv6");
+SYSCTL_NODE(_net_inet6, IPPROTO_UDP, udp6, CTLFLAG_RW, 0,
"UDPv6");
+SYSCTL_NODE(_net_inet6, IPPROTO_TCP, tcp6, CTLFLAG_RW, 0,
"TCPv6");
#ifdef SCTP
-SYSCTL_NODE(_net_inet6, IPPROTO_SCTP, sctp6, CTLFLAG_RW, 0,
"SCTP6");
+SYSCTL_NODE(_net_inet6, IPPROTO_SCTP, sctp6, CTLFLAG_RW, 0,
"SCTPv6");
#endif
#ifdef IPSEC
SYSCTL_NODE(_net_inet6, IPPROTO_ESP, ipsec6, CTLFLAG_RW, 0,
"IPSEC6");
@@ -515,77 +512,99 @@
}
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_FORWARDING, forwarding, CTLFLAG_RW,
- &VNET_NAME(ip6_forwarding), 0, "");
+ &VNET_NAME(ip6_forwarding), 0,
+ "Forward IPv6 packets via node");
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_SENDREDIRECTS, redirect, CTLFLAG_RW,
- &VNET_NAME(ip6_sendredirects), 0, "");
+ &VNET_NAME(ip6_sendredirects), 0,
+ "Redirect IPv6 packets via node");
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_DEFHLIM, hlim, CTLFLAG_RW,
- &VNET_NAME(ip6_defhlim), 0, "");
+ &VNET_NAME(ip6_defhlim), 0,
+ "Default hop limit for IPv6 unicast packets");
SYSCTL_VNET_STRUCT(_net_inet6_ip6, IPV6CTL_STATS, stats, CTLFLAG_RW,
- &VNET_NAME(ip6stat), ip6stat, "");
+ &VNET_NAME(ip6stat), ip6stat,
+ "IPv6 statistics");
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGPACKETS, maxfragpackets,
- CTLFLAG_RW, &VNET_NAME(ip6_maxfragpackets), 0, "");
+ CTLFLAG_RW, &VNET_NAME(ip6_maxfragpackets), 0,
+ "Maximum number of fragmented packets to process");
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_ACCEPT_RTADV, accept_rtadv,
- CTLFLAG_RW, &VNET_NAME(ip6_accept_rtadv), 0,
- "Default value of per-interface flag for accepting ICMPv6 Router"
- "Advertisement messages");
+ CTLFLAG_RW, &VNET_NAME(ip6_accept_rtadv), 0,
+ "Default value of per-interface flag for accepting ICMPv6 Router"
+ "Advertisement messages");
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_NO_RADR, no_radr,
- CTLFLAG_RW, &VNET_NAME(ip6_no_radr), 0,
- "Default value of per-interface flag to control whether routers "
- "sending ICMPv6 RA messages on that interface are added into the "
- "default router list.");
+ CTLFLAG_RW, &VNET_NAME(ip6_no_radr), 0,
+ "Default value of per-interface flag to control whether routers "
+ "sending ICMPv6 RA messages on that interface are added into the "
+ "default router list");
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_NORBIT_RAIF, norbit_raif, CTLFLAG_RW,
- &VNET_NAME(ip6_norbit_raif), 0,
- "Always set 0 to R flag in ICMPv6 NA messages when accepting RA"
- " on the interface.");
+ &VNET_NAME(ip6_norbit_raif), 0,
+ "Always set 0 to R flag in ICMPv6 NA messages when accepting RA "
+ "on the interface");
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_RFC6204W3, rfc6204w3,
- CTLFLAG_RW, &VNET_NAME(ip6_rfc6204w3), 0,
- "Accept the default router list from ICMPv6 RA messages even "
- "when packet forwarding enabled.");
+ CTLFLAG_RW, &VNET_NAME(ip6_rfc6204w3), 0,
+ "Accept the default router list from ICMPv6 RA messages even when packet "
+ "forwarding enabled");
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_KEEPFAITH, keepfaith, CTLFLAG_RW,
- &VNET_NAME(ip6_keepfaith), 0, "");
+ &VNET_NAME(ip6_keepfaith), 0,
+ "");
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_LOG_INTERVAL, log_interval,
- CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0, "");
+ CTLFLAG_RW, &VNET_NAME(ip6_log_interval), 0,
+ "Period (in secs) for throttling logging for high-traffic operations");
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_HDRNESTLIMIT, hdrnestlimit,
- CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0, "");
+ CTLFLAG_RW, &VNET_NAME(ip6_hdrnestlimit), 0,
+ "Maximum number of nested header options to process");
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_DAD_COUNT, dad_count, CTLFLAG_RW,
- &VNET_NAME(ip6_dad_count), 0, "");
+ &VNET_NAME(ip6_dad_count), 0,
+ "Number of Duplicate Address Detection attempts to try before "
+ "disabling interface. Setting the value to 0 disables DAD");
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_AUTO_FLOWLABEL, auto_flowlabel,
- CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0, "");
+ CTLFLAG_RW, &VNET_NAME(ip6_auto_flowlabel), 0,
+ "Automatically attach a flowlabel to IPv6 packets");
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_DEFMCASTHLIM, defmcasthlim,
- CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0, "");
+ CTLFLAG_RW, &VNET_NAME(ip6_defmcasthlim), 0,
+ "Default hop limit for ip6 multicast packets");
SYSCTL_STRING(_net_inet6_ip6, IPV6CTL_KAME_VERSION, kame_version,
- CTLFLAG_RD, __KAME_VERSION, 0, "");
+ CTLFLAG_RD, __KAME_VERSION, 0,
+ "");
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_USE_DEPRECATED, use_deprecated,
- CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0, "");
-SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_RR_PRUNE, rr_prune, CTLFLAG_RW,
- &VNET_NAME(ip6_rr_prune), 0, "");
+ CTLFLAG_RW, &VNET_NAME(ip6_use_deprecated), 0,
+ "Use deprecated IPv6 support");
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_USETEMPADDR, use_tempaddr,
- CTLFLAG_RW, &VNET_NAME(ip6_use_tempaddr), 0, "");
+ CTLFLAG_RW, &VNET_NAME(ip6_use_tempaddr), 0,
+ "Use a temporary address when establishing address via SLAAC");
SYSCTL_VNET_PROC(_net_inet6_ip6, IPV6CTL_TEMPPLTIME, temppltime,
- CTLTYPE_INT|CTLFLAG_RW, &VNET_NAME(ip6_temp_preferred_lifetime), 0,
- sysctl_ip6_temppltime, "I", "");
+ CTLTYPE_INT|CTLFLAG_RW, &VNET_NAME(ip6_temp_preferred_lifetime), 0,
+ sysctl_ip6_temppltime, "I",
+ "Preferred lifetime (in secs) for a temporary address");
SYSCTL_VNET_PROC(_net_inet6_ip6, IPV6CTL_TEMPVLTIME, tempvltime,
- CTLTYPE_INT|CTLFLAG_RW, &VNET_NAME(ip6_temp_valid_lifetime), 0,
- sysctl_ip6_tempvltime, "I", "");
+ CTLTYPE_INT|CTLFLAG_RW, &VNET_NAME(ip6_temp_valid_lifetime), 0,
+ sysctl_ip6_tempvltime, "I",
+ "Valid lifetime (in secs) for a temporary address");
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_V6ONLY, v6only, CTLFLAG_RW,
- &VNET_NAME(ip6_v6only), 0, "");
+ &VNET_NAME(ip6_v6only), 0,
+ "Allow IPv4-mapped ip6 addresses per RFC 3493");
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_AUTO_LINKLOCAL, auto_linklocal,
- CTLFLAG_RW, &VNET_NAME(ip6_auto_linklocal), 0,
- "Default value of per-interface flag for automatically adding an IPv6"
- " link-local address to interfaces when attached");
-SYSCTL_VNET_STRUCT(_net_inet6_ip6, IPV6CTL_RIP6STATS, rip6stats, CTLFLAG_RW,
- &VNET_NAME(rip6stat), rip6stat, "");
+ CTLFLAG_RW, &VNET_NAME(ip6_auto_linklocal), 0,
+ "Default value of per-interface flag for automatically adding an ip6 "
+ "link-local address to interfaces when attached");
+SYSCTL_VNET_STRUCT(_net_inet6_ip6, IPV6CTL_RIPV6STATS, rip6stats, CTLFLAG_RW,
+ &VNET_NAME(rip6stat), rip6stat,
+ "RIP6 statistics");
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_PREFER_TEMPADDR, prefer_tempaddr,
- CTLFLAG_RW, &VNET_NAME(ip6_prefer_tempaddr), 0, "");
+ CTLFLAG_RW, &VNET_NAME(ip6_prefer_tempaddr), 0,
+ "Prefer the temporary address assigned when performing NUD");
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_USE_DEFAULTZONE, use_defaultzone,
- CTLFLAG_RW, &VNET_NAME(ip6_use_defzone), 0,"");
+ CTLFLAG_RW, &VNET_NAME(ip6_use_defzone), 0,
+ "Use the default scope zone if not explicitly provided");
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_MAXFRAGS, maxfrags, CTLFLAG_RW,
- &VNET_NAME(ip6_maxfrags), 0, "");
+ &VNET_NAME(ip6_maxfrags), 0,
+ "Maximum number of fragments to hold in the reassembly queue");
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_MCAST_PMTU, mcast_pmtu, CTLFLAG_RW,
- &VNET_NAME(ip6_mcast_pmtu), 0, "");
+ &VNET_NAME(ip6_mcast_pmtu), 0,
+ "Enable multicast pMTU discovery");
#ifdef IPSTEALTH
SYSCTL_VNET_INT(_net_inet6_ip6, IPV6CTL_STEALTH, stealth, CTLFLAG_RW,
- &VNET_NAME(ip6stealth), 0, "");
+ &VNET_NAME(ip6stealth), 0,
+ "IPv6 stealth mode. No hop limit decrementation on forwarding");
#endif
#ifdef FLOWTABLE
@@ -600,29 +619,39 @@
/* net.inet6.icmp6 */
SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRACCEPT, rediraccept,
- CTLFLAG_RW, &VNET_NAME(icmp6_rediraccept), 0, "");
-SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_REDIRTIMEOUT, redirtimeout,
- CTLFLAG_RW, &VNET_NAME(icmp6_redirtimeout), 0, "");
+ CTLFLAG_RW, &VNET_NAME(icmp6_rediraccept), 0,
+ "Accept and process router redirects");
SYSCTL_VNET_STRUCT(_net_inet6_icmp6, ICMPV6CTL_STATS, stats, CTLFLAG_RW,
- &VNET_NAME(icmp6stat), icmp6stat, "");
+ &VNET_NAME(icmp6stat), icmp6stat,
+ "ICMPv6 statistics");
SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_PRUNE, nd6_prune, CTLFLAG_RW,
- &VNET_NAME(nd6_prune), 0, "");
+ &VNET_NAME(nd6_prune), 0,
+ "Period (in secs) for checking for stale router entries via nd6");
SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DELAY, nd6_delay, CTLFLAG_RW,
- &VNET_NAME(nd6_delay), 0, "");
+ &VNET_NAME(nd6_delay), 0,
+ "Delay (in secs) before performing NUD on stale nodes");
SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_UMAXTRIES, nd6_umaxtries,
- CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0, "");
+ CTLFLAG_RW, &VNET_NAME(nd6_umaxtries), 0,
+ "Maximum number of unicast queries to perform via nd6");
SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MMAXTRIES, nd6_mmaxtries,
- CTLFLAG_RW, &VNET_NAME(nd6_mmaxtries), 0, "");
+ CTLFLAG_RW, &VNET_NAME(nd6_mmaxtries), 0,
+ "Maximum number of multicast queries to perform via nd6");
SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_USELOOPBACK, nd6_useloopback,
- CTLFLAG_RW, &VNET_NAME(nd6_useloopback), 0, "");
+ CTLFLAG_RW, &VNET_NAME(nd6_useloopback), 0,
+ "Use loopback interface for local traffic");
SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_NODEINFO, nodeinfo, CTLFLAG_RW,
- &VNET_NAME(icmp6_nodeinfo), 0, "");
+ &VNET_NAME(icmp6_nodeinfo), 0,
+ "Node information state");
SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ERRPPSLIMIT, errppslimit,
- CTLFLAG_RW, &VNET_NAME(icmp6errppslim), 0, "");
+ CTLFLAG_RW, &VNET_NAME(icmp6errppslim), 0,
+ "Packets per second limit for ICMPv6 queries");
SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_MAXNUDHINT, nd6_maxnudhint,
- CTLFLAG_RW, &VNET_NAME(nd6_maxnudhint), 0, "");
+ CTLFLAG_RW, &VNET_NAME(nd6_maxnudhint), 0,
+ "Maximum number of upper layer hints");
SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_DEBUG, nd6_debug, CTLFLAG_RW,
- &VNET_NAME(nd6_debug), 0, "");
+ &VNET_NAME(nd6_debug), 0,
+ "");
SYSCTL_VNET_INT(_net_inet6_icmp6, ICMPV6CTL_ND6_ONLINKNSRFC4861,
- nd6_onlink_ns_rfc4861, CTLFLAG_RW, &VNET_NAME(nd6_onlink_ns_rfc4861),
- 0, "Accept 'on-link' nd6 NS in compliance with RFC 4861.");
+ nd6_onlink_ns_rfc4861,
+ CTLFLAG_RW, &VNET_NAME(nd6_onlink_ns_rfc4861), 0,
+ "Accept 'on-link' nd6 NS in compliance with RFC 4861");
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