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rt-thread-official/components/net/lwip_nat
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Bernard Xiong 8c1c6516b3 [Components] Change license to Apache License v2.0 2018-10-29 11:06:58 +08:00
..
README.md [lwIP] Add NAT readme 2015-01-29 13:47:57 +00:00
SConscript [lwIP] remove IP_INPUT_HOOK 2015-01-29 15:01:26 +08:00
ipv4_nat.c [Components] Change license to Apache License v2.0 2018-10-29 11:06:58 +08:00
ipv4_nat.h [Components] Change license to Apache License v2.0 2018-10-29 11:06:58 +08:00

README.md

lwIP NAT componenent

If you want to use lwIP NAT componenent, please define LWIP_USING_NAT in rtconfig.h.

In this case the network 213.129.231.168/29 is nat'ed when packets are sent to the destination network 10.0.0.0/24 (untypical example - most users will have the other way around).

Use following code to add a NAT entry:

ip_nat_entry_t nat_entry;

nat_entry.out_if = (struct netif *)&emac_if1; nat_entry.in_if = (struct netif *)&emac_if2; IP4_ADDR(&nat_entry.source_net, 213, 129, 231, 168); IP4_ADDR(&nat_entry.source_netmask, 255, 255, 255, 248); IP4_ADDR(&nat_entry.dest_net, 10, 0, 0, 0); IP4_ADDR(&nat_entry.source_netmask, 255, 0, 0, 0); ip_nat_add(&_nat_entry);