opennox-proxy

README

OpenNox net proxy

This tool helps debug networking problems by sitting between Nox/OpenNox clients and the server.

/        \<--|        |<--|               |<--|          |
|Client 1|   |        |   | C1 proxy port |   |          |
\        /-->| Proxy  |-->|               |-->| Real Nox |
             | server |                       | server   |
/        \-->| port   |-->|               |-->|          |
|Client 2|   |        |   | C2 proxy port |   |          |
\        /<--|        |<--|               |<--|          |

Flow from client

1. Packets from clients are accepted on the server proxy port.
2. Proxy then allocates a unique proxy port for each client (since Nox uses ip+port for client id).
3. Client packets are then sent from client proxy port to the real server.

Flow from server

1. Packets are received on unique client proxy port.
2. They are then sent from server proxy port to the client.

How to run

go run ./cmd/opennox-proxy --server=<server-ip>:18590 --host=0.0.0.0:18600 --file=network.jsonl

This will run a proxy on port 18600, which is not standard for Nox, thus server discovery will not find it.

You must add the proxy address to game_ip.txt file in Nox directory (as 127.0.0.1:18600).

After this, you should see a new server in the server list, you will recognize it by "Proxy:" prefix.

While you are connected to this server, all network messages are logged to network.jsonl. Once you're done with testing, disconnect from the proxy, and close it.

Now you can run go run ./cmd/opennox-packet-decode that will decode known network messages in network.jsonl and will write them to network-dec.jsonl, which can then be inspected.