LWIP multiple IP addresses for single-network ports

Space

Ethernet_input (struct pbuf *p, struct netif *netif)

This function has two parameters, *p points to the received network data, and *NETIF indicates which network interface received the number

LWIP internal processing, as if the second parameter is not very large, because when the data is actually processed,

The IP address in the received data is consistent with the IP address of the *netif, and if the inconsistency looks for the next

In the netif, and then again compare IP addresses, if no consistent IP address is found, this packet is not broadcast

Data packets, the data is discarded.

Regardless of the data received from the network port, will be traversed over the use of the network is the required data, this

Seemingly redundant logic provides a theoretical basis for multiple IP addresses in single-port networks.