I will stop working on this for a while and start other projects to get used to rust and programming. I will come back to this project and fix it up
Status: Theres still NUL chars. wont make the mistake of not committing ever again
my code have 20 bad code practices :(
Usage: cargo run . -- mode
mode: send and recv
Also please note that even though I MADE THE PROTOCOL. the program itself doesnt follow it exactly (indexing issue + skill issue)
Metadata packet (512 bytes): The metadata packet will be sent to the receiver at the start of sending the file. 0-8 bytes: u64 size in bytes 8-12 bytes: idempt (must always be 0 at metadata handshake if not recv will send Cancel) 13-512 bytes: Filename (will be truncated if longer than that) // Kept at 1 packet for the sake of simplicity
Data packet (512 bytes): 0-8 bytes: The Hash of the entire packet (u64 rust default hasher) 9 byte: Opcode (1: Cancel, 2: Finished. close conn) 10-14 bytes: Packet count that starts as 0. so if the same packet gets sent again ignore the packet (u32) (idempt) (Thanks tom scott) 15-512 bytes: The actual file
For each packet the receiver will send the following back to the sender 1: Everything is okay. Continue as normal. 2: Reserved 3: Cancel
If the hash of the received packet isnt the same as the first 8 bytes then the receiver will just cancel (Behavior might be changed soon)
If the opcode is 2. The receiver will close the connection
Actual file sent in each packet = 498
All of these packets will be in a u8 array with the length of 512