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tcp.4: undocument compressed TIME_WAIT

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This commit is contained in:
Gleb Smirnoff 2022-10-31 09:02:33 -07:00
parent c348e88053
commit 620042a66b
1 changed files with 1 additions and 18 deletions
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19
share/man/man4/tcp.4
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@ -753,23 +753,6 @@ A value of 2 results in any
packets to closed ports being logged.
Any value not listed above disables the logging
(default is 0, i.e., the logging is disabled).
.It Va maxtcptw
When a TCP connection enters the
.Dv TIME_WAIT
state, its associated socket structure is freed, since it is of
negligible size and use, and a new structure is allocated to contain a
minimal amount of information necessary for sustaining a connection in
this state, called the compressed TCP
.Dv TIME_WAIT
state.
Since this structure is smaller than a socket structure, it can save
a significant amount of system memory.
The
.Va net.inet.tcp.maxtcptw
MIB variable controls the maximum number of these structures allocated.
By default, it is initialized to
.Va kern.ipc.maxsockets
/ 5.
.It Va minmss
Minimum TCP Maximum Segment Size; used to prevent a denial of service attack
from an unreasonably low MSS.
@ -786,7 +769,7 @@ application limited and the network bandwidth is not utilized completely.
That prevents self-inflicted packet losses once the application starts to
transmit data at a higher speed.
.It Va nolocaltimewait
Suppress creation of compressed TCP
Suppress creation of TCP
.Dv TIME_WAIT
states for connections in
which both endpoints are local.