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net/nat: Make some IPv4 NAT functions as common

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To prepare for future IPv6 NAT functions.
- Rename common ipv4_nat_xxx to nat_xxx
- Move some common definitions into header

Signed-off-by: Zhe Weng <wengzhe@xiaomi.com>
This commit is contained in:
Zhe Weng
2024-03-18 18:41:38 +08:00
committed by Xiang Xiao
parent 412d2ce113
commit f2ff5cee03
10 changed files with 462 additions and 338 deletions
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Documentation/components/net/nat.rst
+6 -6
View File
@@ -75,10 +75,10 @@ Configuration Options
Usage
=====
- :c:func:`ipv4_nat_enable()`
- :c:func:`ipv4_nat_disable()`
- :c:func:`nat_enable()`
- :c:func:`nat_disable()`
.. c:function:: int ipv4_nat_enable(FAR struct net_driver_s *dev);
.. c:function:: int nat_enable(FAR struct net_driver_s *dev);
Enable NAT function on a network device, on which the outbound packets
will be masqueraded.
@@ -86,7 +86,7 @@ Usage
:return: Zero is returned if NAT function is successfully enabled on
the device; A negated errno value is returned if failed.
.. c:function:: int ipv4_nat_disable(FAR struct net_driver_s *dev);
.. c:function:: int nat_disable(FAR struct net_driver_s *dev);
Disable NAT function on a network device.
@@ -107,7 +107,7 @@ Validated on Ubuntu 22.04 x86_64 with NuttX SIM by following steps:
# CONFIG_SIM_NET_BRIDGE is not set
CONFIG_SIM_NETDEV_NUMBER=2
2. Call ``ipv4_nat_enable`` on one dev on startup, or manually enable NAT
2. Call ``nat_enable`` on one dev on startup, or manually enable NAT
with ``iptables`` command (either may work).
.. code-block:: c
@@ -116,7 +116,7 @@ Validated on Ubuntu 22.04 x86_64 with NuttX SIM by following steps:
int netdriver_init(void)
{
...
ipv4_nat_enable(&g_sim_dev[0]);
nat_enable(&g_sim_dev[0]);
...
}