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Index: share/man/man4/inet.4
===================================================================
--- share/man/man4/inet.4
+++ share/man/man4/inet.4
@@ -158,38 +158,36 @@
API.
.El
.Ss MIB Variables
-A number of variables are implemented in the net.inet branch of the
+In addition to the variables supported by the transport protocols in
+.Va net.inet
+(for which the respective manual pages may be consulted),
+there are a number of general variables implemented in the
+.Va net.inet.ip
+branch of the
.Xr sysctl 3
MIB.
-In addition to the variables supported by the transport protocols
-(for which the respective manual pages may be consulted),
-the following general variables are defined:
-.Bl -tag -width IPCTL_ACCEPTSOURCEROUTE
-.It Dv IPCTL_FORWARDING
-.Pq ip.forwarding
+The following general variabls are defined:
+.Bl -tag -width ".Va accept_sourceroute"
+.It Va forwarding
Boolean: enable/disable forwarding of IP packets.
Defaults to off.
-.It Dv IPCTL_SENDREDIRECTS
-.Pq ip.redirect
+.It Va redirect
Boolean: enable/disable sending of ICMP redirects in response to
.Tn IP
packets for which a better, and for the sender directly reachable, route
and next hop is known.
Defaults to on.
-.It Dv IPCTL_DEFTTL
-.Pq ip.ttl
+.It Va ttl
Integer: default time-to-live
.Pq Dq TTL
to use for outgoing
.Tn IP
packets.
-.It Dv IPCTL_ACCEPTSOURCEROUTE
-.Pq ip.accept_sourceroute
+.It Va accept_sourceroute
Boolean: enable/disable accepting of source-routed IP packets (default false).
-.It Dv IPCTL_SOURCEROUTE
-.Pq ip.sourceroute
+.It Va sourceroute
Boolean: enable/disable forwarding of source-routed IP packets (default false).
-.It Va ip.process_options
+.It Va process_options
Integer: control IP options processing.
By setting this variable to 0, all IP options in the incoming packets
will be ignored, and the packets will be passed unmodified.
@@ -204,9 +202,9 @@
.Xr sysctl 8
variable affects packets destined for a local host as well as packets
forwarded to some other host.
-.It Va ip.rfc1122_strong_es
+.It Va rfc1122_strong_es
Boolean: in non-forwarding mode
-.Pq ip.forwarding is disabled
+.Pq forwarding is disabled
partially implement the Strong End System model per RFC1122.
If a packet with destination address that is local arrives on a different
interface than the interface the address belongs to, the packet would be
@@ -219,7 +217,7 @@
.Xr pfil 4
filters may override and bypass this check.
Disabled by default.
-.It Va ip.source_address_validation
+.It Va source_address_validation
Boolean: perform source address validation for packets destined for the local
host.
Consider this as following Section 3.2 of RFC3704/BCP84, where we treat local
@@ -227,7 +225,7 @@
This has no effect on packets to be forwarded, so don't consider it as
anti-spoof feature for a router.
Enabled by default.
-.It Va ip.rfc6864
+.It Va rfc6864
Boolean: control IP IDs generation behaviour.
True value enables RFC6864 support, which specifies that IP ID field of
.Em atomic
@@ -235,14 +233,14 @@
The
.Fx implementation sets it to zero.
Enabled by default.
-.It Va ip.random_id
+.It Va random_id
Boolean: control IP IDs generation behaviour.
Setting this
.Xr sysctl 8
to 1 causes the ID field in
.Em non-atomic
IP datagrams (or all IP datagrams, if
-.Va ip.rfc6864
+.Va rfc6864
is disabled) to be randomized instead of incremented by 1 with each packet
generated.
This closes a minor information leak which allows remote observers to
@@ -252,21 +250,21 @@
cycle greatly.
Default is 0 (sequential IP IDs).
IPv6 flow IDs and fragment IDs are always random.
-.It Va ip.maxfrags
+.It Va maxfrags
Integer: maximum number of fragments the host will accept and simultaneously
hold across all reassembly queues in all VNETs.
If set to 0, reassembly is disabled.
If set to -1, this limit is not applied.
This limit is recalculated when the number of mbuf clusters is changed.
This is a global limit.
-.It Va ip.maxfragpackets
+.It Va maxfragpackets
Integer: maximum number of fragmented packets the host will accept and
simultaneously hold in the reassembly queue for a particular VNET.
0 means that the host will not accept any fragmented packets for that VNET.
\-1 means that the host will not apply this limit for that VNET.
This limit is recalculated when the number of mbuf clusters is changed.
This is a per-VNET limit.
-.It Va ip.maxfragbucketsize
+.It Va maxfragbucketsize
Integer: maximum number of reassembly queues per bucket.
Fragmented packets are hashed to buckets.
Each bucket has a list of reassembly queues.
@@ -276,21 +274,21 @@
queues allowed in each bucket.
This limit is recalculated when the number of mbuf clusters is changed or
when the value of
-.Va ip.maxfragpackets
+.Va maxfragpackets
changes.
This is a per-VNET limit.
-.It Va ip.maxfragsperpacket
+.It Va maxfragsperpacket
Integer: maximum number of fragments the host will accept and hold
in the reassembly queue for a packet.
0 means that the host will not accept any fragmented packets for the VNET.
This is a per-VNET limit.
-.It Va ip.allow_net0
+.It Va allow_net0
Boolean: allow experimental use of addresses in 0.0.0.0/8 as endpoints,
and allow forwarding of packets with these addresses.
-.It Va ip.allow_net240
+.It Va allow_net240
Boolean: allow experimental use of addresses in 240.0.0.0/4 as endpoints,
and allow forwarding of packets with these addresses.
-.It Va ip.loopback_prefixlen
+.It Va loopback_prefixlen
Integer: prefix length of the address space reserved for loopback purposes.
The default is 8, meaning that 127.0.0.0/8 is reserved for loopback,
and cannot be sent, received, or forwarded on a non-loopback interface.
Index: share/man/man4/tcp.4
===================================================================
--- share/man/man4/tcp.4
+++ share/man/man4/tcp.4
@@ -421,9 +421,8 @@
branch of the
.Xr sysctl 3
MIB.
-.Bl -tag -width ".Va TCPCTL_DO_RFC1323"
-.It Dv TCPCTL_DO_RFC1323
-.Pq Va rfc1323
+.Bl -tag -width ".Va v6pmtud_blackhole_mss"
+.It Va rfc1323
Implement the window scaling and timestamp options of RFC 1323/RFC 7323
(default is true).
.It Va tolerate_missing_ts
@@ -437,18 +436,15 @@
As of June 2021, several TCP stacks are known to violate RFC 7323, including
modern widely deployed ones.
Therefore the default is 1, i.e., the missing of timestamps is tolerated.
-.It Dv TCPCTL_MSSDFLT
-.Pq Va mssdflt
+.It Va mssdflt
The default value used for the maximum segment size
.Pq Dq MSS
when no advice to the contrary is received from MSS negotiation.
-.It Dv TCPCTL_SENDSPACE
-.Pq Va sendspace
+.It Va sendspace
Maximum
.Tn TCP
send window.
-.It Dv TCPCTL_RECVSPACE
-.Pq Va recvspace
+.It Va recvspace
Maximum
.Tn TCP
receive window.
Index: share/man/man4/udp.4
===================================================================
--- share/man/man4/udp.4
+++ share/man/man4/udp.4
@@ -114,24 +114,21 @@
The
.Nm
protocol implements a number of variables in the
-.Li net.inet
+.Va net.inet.udp
branch of the
.Xr sysctl 3
-MIB.
-.Bl -tag -width UDPCTL_RECVSPACEX
-.It UDPCTL_CHECKSUM
-.Pq udp.checksum
+MIB:
+.Bl -tag -width ".Va log_in_vain"
+.It Va checksum
Enable udp checksums (enabled by default).
-.It UDPCTL_MAXDGRAM
-.Pq udp.maxdgram
+.It Va maxdgram
Maximum outgoing UDP datagram size
-.It UDPCTL_RECVSPACE
-.Pq udp.recvspace
+.It Va recvspace
Maximum space for incoming UDP datagrams
-.It udp.log_in_vain
+.It Va log_in_vain
For all udp datagrams, to ports on which there is no socket
listening, log the connection attempt (disabled by default).
-.It udp.blackhole
+.It Va blackhole
When a datagram is received on a port where there is no socket
listening, do not return an ICMP port unreachable message.
(Disabled by default.

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