Redirecting traffic on Windows?

Question

Computer networks

Hello!

I'm doing my diploma. The goal is to create software "simulator" for teaching students how to work with network equipment, which is used to build a transport network.
The simulator program will implement all stages of building a transport network. After the devices are physically connected to the network, each device is remotely managed via the SNMP protocol. There is a separate program from the hardware manufacturer - the network management system (NMS) - communicates with the hardware via SNMP. NMS sets the parameters of the equipment, receives notifications from it.

I decided to write an SNMP agent program that implements a conversation with the NMS, as it happens with real hardware. To interact with the equipment, it is assigned an ip address.
The question is: NMS sends packets on port 161 to the corresponding ip addresses. How can I get all these packets and send replies from these ips?