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| -rw-r--r-- | components/net/lwip_nat/README.md | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/components/net/lwip_nat/README.md b/components/net/lwip_nat/README.md new file mode 100644 index 0000000000..9672a11b54 --- /dev/null +++ b/components/net/lwip_nat/README.md @@ -0,0 +1,19 @@ +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); |