UDP NAT2NAT

Design

------

We are looking for a UDP NAT2NAT solution.? Similar to Skype.?

The application supplied will be composed of three programs:

1. Client 1

2. Client 2

3. Server

The application will be composed of the following:

1. Client 1 will be run on Host 1 - H1

2. Client 2 will be run on Host 2 - H2

3. Server - will be run on the Server - S

4. Router 1 - R1

5. Router 2 - R2

6. Network 1 - N1

7. Network 2 - N2

Here is a diagram:

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? S

? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? |

H1 - N1 - R1? - Internet - R2 - N2 - H2

The idea is that H1 will have a UDP tunnel directly to H2.

This is how skype works.

We are interested in a similar solution.

## Deliverables

The Protocol:

-----------------

H1 is situated within N1.

H1 would contact S via R1.

S would actually know the IP and Port of R1 via which H1 contacted S.

H2 would then also contact S

But H2 would receive H1/R1's IP/Port.

S would take the contact info:

? the IP and Port of H1/R1 and give them to H2.

H2 would now access H1 directly.

H2 and H1 are now sending and receiving UDP packets to/from each other.

?

User Interface

-------------------

I am interested in a simple console based application.

There is no need for any user comple user input.

The application should have a main menu:

1. Run Server

2. Run Client1

3. Run Client2

If the user selects 1:

Then the app runs the server.?

The server awaits client 1 to contact it.?

Afer client 1 contacts it, the server awaits client 2 to contact it.

So the app would now ask the user on what port he wants to the server to listen.

Now the app awaits Client 2 would contact it.

Any data received from Client 2 would be displayed by the app.

It also awaits user input.

It would send the user input to Client 2 as soon as it contacts the app.

If the user selects 2:

Then the app runs client 1.?

Client 1 contacts the server.?

The server saves the ip/port by which client 1 contacted the Server.

If the user selects 3:

The the app runs Client 2.

Client 2 contacts the server.

It then requests from the server the ip/port of Client1.

Next, Client 2 contacts Client 1 using this ip/port.

Now the app requests user input and sends it to Client 1.

If Client 1 sends something, then the app displays it.

?

Technology

---------------

You may use the Berkley protocol or WinSock.

Programare C# Inginerie Microsoft MySQL PHP Gestionarea proiectului Arhitectură software Testare software Windows Desktop

ID Proiect: #2972096

Detalii despre proiect