Isabelle's Lazy Message Protocol

Isabelle L. 1e8f1a37f3 rustfmt / changed message packet byte to 0xfc		vor 5 Jahren
src	rustfmt / changed message packet byte to 0xfc	vor 5 Jahren
.gitignore	initial commit	vor 5 Jahren
Cargo.toml	adjusted `initialize_connection` so errors aren't potentially panicking	vor 5 Jahren
LICENSE	initial commit	vor 5 Jahren
README.md	rustfmt / changed message packet byte to 0xfc	vor 5 Jahren
justfile	added CRC32 checksum and a justfile	vor 5 Jahren

Isabelle’s Lazy Message Protocol

I don’t know whether or not this is a super practical way of doing things but I’m lazy and it seems to work so gonna roll with it lol

segment size	usage
1 byte	u8 packet kind
1 byte	u8 encrypt flag
8 byte	u64 length of the packet contents
4 byte	CRC32 packet contents checksum
32 byte	SHA256 packet contents integrity check
`u64::MAX`	packet contents

packet kind has defined values for packets but leaves many open for user defined packets to be added to the protocol

byte	packet kind
`0x00-0xfb`	valid for custom packet usage
`0xfc`	message - a simple text packet
`0xfd`	leave - announces a disconnect
`0xfe`	join - announces a new connection
`0xff`	agreement - used to help generate an agreed upon key

encrypt flag can be 0x00 for no encrypt or 0xff for ring AEAD symmetric encrypt