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Signed-off-by: a1012112796 <1012112796@qq.com>
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2022-09-26 15:31:48 +08:00
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rt-thread/components/net/lwip-nat/README.md Normal file
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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);