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doc/nat: update config options

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Signed-off-by: Zhe Weng <wengzhe@xiaomi.com>
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Zhe Weng 2022-12-22 11:17:55 +08:00 • committed by Xiang Xiao
parent a9da1fff28
commit 45b7debe13
1 changed files with 10 additions and 0 deletions
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10
Documentation/reference/os/nat.rst
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@ -46,6 +46,8 @@ Configuration Options
``CONFIG_NET_NAT``
Enable or disable Network Address Translation (NAT) function.
Depends on ``CONFIG_NET_IPFORWARD``.
``CONFIG_NET_NAT_HASH_BITS``
The bits of the hashtable of NAT entries, hashtable has (1 << bits) buckets.
``CONFIG_NET_NAT_TCP_EXPIRE_SEC``
The expiration time for idle TCP entry in NAT.
The default value 86400 is suggested by RFC2663, Section 2.6,
@ -55,6 +57,14 @@ Configuration Options
The expiration time for idle UDP entry in NAT.
``CONFIG_NET_NAT_ICMP_EXPIRE_SEC``
The expiration time for idle ICMP entry in NAT.
``CONFIG_NET_NAT_ENTRY_RECLAIM_SEC``
The time to auto reclaim all expired NAT entries. A value of zero will
disable auto reclaiming.
Expired entries will be automatically reclaimed when matching
inbound/outbound entries, so this config does not have significant
impact when NAT is normally used, but very useful when the hashtable
is big and there are only a few connections using NAT (which will
only trigger reclaiming on a few chains in hashtable).
Usage
=====