How does a Proxy works exactly?

[Pro-grammer]

Hey folks,

In my school I've been programming alot in the C++ programming language, and have managed to control sockets for a chat program, and was thinking about making a simple Proxy for parsing packets to the client.

If I'm not wrong, I must create a ProxyServer that listens in the localhost:7171 and localhost:7172 (login), and listen to the real tibia servers (tibia01..login01....), then if I get a packet from the Tibia client, I must parse this packet and send it to the real tibia servers, get an answer, and send it back to the client, and repeat this whole thing for both protocols Login and Game.

Is this correct?.

Also, Tibia 9.5+ uses Alder32, Rsa and Xtea right?.

[Blaster_89]

1. Overwrite the client's login server(s) and port(s) with your loopback IP and the port you want to listen to
2. Set up a socket to listen to TCP connections on the port you used earlier
3. When a connection is accepted, create a new thread or run the next code asynchronously
4. Either read the client's memory or decrypt the packet and read it to determine where to connect, create a new socket and connect accordingly
   Remember to alter the character list by modyfing the packet or memory writing! You will have to store the original data and connect accordingly when a client wants to connect to a gameserver
5. At this point you will be able to inspect, modify, remove and send packets

edit: to clarify, you will need one socket that is listening, one socket for the proxy<->client connection, and one socket for the proxy<->server connection
edit2: also remember to store the original login servers, as you will need to connect to them

[Pro-grammer]

1. Overwrite the client's login server(s) and port(s) with your loopback IP and the port you want to listen to
2. Set up a socket to listen to TCP connections on the port you used earlier
3. When a connection is accepted, create a new thread or run the next code asynchronously
4. Either read the client's memory or decrypt the packet and read it to determine where to connect, create a new socket and connect accordingly
   Remember to alter the character list by modyfing the packet or memory writing! You will have to store the original data and connect accordingly when a client wants to connect to a gameserver
5. At this point you will be able to inspect, modify, remove and send packets

edit: to clarify, you will need one socket that is listening, one socket for the proxy<->client connection, and one socket for the proxy<->server connection
edit2: also remember to store the original login servers, as you will need to connect to them

Tibia Server Game 7172 / Tibia Server Login 7171

Proxy for Client Login 7171 / Proxy for Client Game 7172 / Proxy for both servers 7171/7172

Correct?.

[Blaster_89]

1. Overwrite the client's login server(s) and port(s) with your loopback IP and the port you want to listen to
2. Set up a socket to listen to TCP connections on the port you used earlier
3. When a connection is accepted, create a new thread or run the next code asynchronously
4. Either read the client's memory or decrypt the packet and read it to determine where to connect, create a new socket and connect accordingly
   Remember to alter the character list by modyfing the packet or memory writing! You will have to store the original data and connect accordingly when a client wants to connect to a gameserver
5. At this point you will be able to inspect, modify, remove and send packets

edit: to clarify, you will need one socket that is listening, one socket for the proxy<->client connection, and one socket for the proxy<->server connection
edit2: also remember to store the original login servers, as you will need to connect to them

Tibia Server Game 7172 / Tibia Server Login 7171

Proxy for Client Login 7171 / Proxy for Client Game 7172 / Proxy for both servers 7171/7172

Correct?.

You can use whatever ports you want to, although I would recommend keeping the socket count to a minimum to allow for cleaner code.

[Czepek]

I fighted against proxy few months a go. You can check my code in this thread. Also would be great if you find some solution to help me to fix it. NetworkMessage class is from OTServ code by the way.

Regards, Czepek!