mirror of
https://github.com/ShadowKatStudios/OC-Minitel.git
synced 2024-11-17 07:48:06 +11:00
40 lines
1.5 KiB
Markdown
40 lines
1.5 KiB
Markdown
# Minitel - Layer 5
|
|
|
|
## Language
|
|
|
|
- Node: a device on a minitel network
|
|
- Client: node establishing a connection
|
|
- Server: node accepting a connection
|
|
|
|
## Establishing a connection
|
|
|
|
- Client sends "openstream" to the server on the port it would like to connect to
|
|
- Server can refuse, and respond with anything but a number
|
|
- Server, upon accepting, sends a string representation of another port, chosen by the server, on the same port, to the client
|
|
- Server sends a random string of its chosing to the client, which will be used to close the session
|
|
- Client and server can now exchange messages
|
|
|
|
## Ending a connection
|
|
|
|
- Upon either side deciding to close, it sends the previously generated random string
|
|
- Neither side should send packets now
|
|
|
|
## Example exchange:
|
|
Acknowledgements are implied.
|
|
|
|
Client bob sends request to open a connection on port 40:
|
|
`"packet ID 1", 1, "alice", "bob", 40, "openstream"`
|
|
|
|
Server alice accepts and sends a port to client bob for further communications:
|
|
`"packet ID 3", 1, "bob", "alice", 40, "32800"`
|
|
|
|
Server alice then sends a string on that port as a close session marker:
|
|
`"packet ID 4", 1, "bob", "alice", 32800, "asdfghjkl"`
|
|
|
|
Nodes alice and bob can now freely exchange data on that port:
|
|
`"packet ID 5", 1, "alice", "bob", 32800, "random data and stuff"`
|
|
`"packet ID 6", 1, "bob", "alice", 32800, "response data"`
|
|
|
|
Client bob decides to close the connection, and sends the close session marker:
|
|
`"packet ID 7", 1, "alice", "bob", 32800, "asdfghjkl"`
|