TiejunMS
commented
2 years ago It is possible to bind to specific IP address by both native and BSD APIs. For BSD APIs, you can simply use bind(). While in native APIs, you will need to setup nx_tcp_socket_syn_received_notify and do the filtering in this callback function.
To support multiple IPv4 addresses, you will need to create multiple logical interfaces (NX_INTERFACE) and handle them correctly in network driver. See example here. For IPv6 addresses, each interface can have multiple addresses.
I'm having a device with two Ethernet ports. I've set them up under a single IP instance by adding a secondary interface. Now, using either the NetX native API or the BSD API, is it possible to do a bind/listen on specific IP address only? What I need is for a TCP server to be able to listen on a specific IP only, or a TCP client to make a connect request with source address as explicitly specified during bind or listen. An addon question to the above is that is it allowed to have multiple IP addresses assigned to a single physical port under NetX.