IOS Network Packet Rerouting function

Goal: To develop a Packet Routing program, of which, part of its function run as a "Network Extension" in IOS. Background: We developed an Android program, of which, part of its function will routes all network packets to a remote server. For this part , it works similar to what a VPN client will do. We are porting our program to IOS. We need an experienced IOS programmer to develop a program that includes the network packet routing function so that we can re-used those codes in our porting works. Deliverables by the freelancer: 1. IOS Main App: Send testing messages to Remote Server via the Network Extension, then expect to receive the same message back from Remote Server. The messages can be contained in a local text file. The program will generate log file in time order to records what packets (and its content) were send to the Remote Server, and what packets were received from the Remote Server, and whether they match with the sending packets. 2. Network Extension of the Main App: for details, see below. Program provided by Job Requester: 1. Remote Proxy Server: It receive packets from IOS Main App and forward the network data to the original targeted server (e.g. a website). Should the targeted server receive any response (network data), the Remote Proxy Server forward it back to the IOS Main App. This Remote Proxy Server is provided by the Job Requester, hosted online, and used by the Freelancer to test the correctness of Main App's functionality. Details for Main App: 1. Config the Network Settings: a. Local socket port 2. Uses the NETunnelProviderManager to start the NEPacketTunnelProvider (Network Extension) Details for Tunnel Provider: 1. To setup the Tunnel such that it will re-route all network packets to a "Local socket" (TCP & UDP). 2. The program receive Re-routed packets from the "Local socket", and send it as payload of a new packet over another "Client socket" to the Remote Proxy Server. a. The TCP's payload data must send with TLS1.2(+) b. UDP are normal 3. "Client Socket" receive the response data from Remote Proxy Server, and redirect their response data back to the "local sockets". Others: - The application shall run in background mode. Develop Environment： - [login to view URL] with C#