Packet - Networking Library

[meager jackal]

idk if im being stupid but is there a way I can sync a dictionary with an unknown amount of keys/values?

for example {a = 0, b = 0, c = 0, abc = 3}. the key name would always be a string, and the value would always be a number, but the k/v pairs would be unknown (e.g. one time it may be {a=0}, another time it may be {b=0,c=0}, etc) & therefore i'd be unable to type each one out

[rain rock]

obv you can't type out something that you don't know

you can just do Packet.Any

that's it

[meager jackal]

alr

ty

[thick atlas]

Try to avoiddoing that, the Any type uses a lot of bytes, i think it tries to adapt to the provided type but idk, make sure to measure the size of the packets that come through

[silent spire]

iirc Any uses 1 extra byte for the type

[thick atlas]

oh............................

[rain rock]

Packet.Nil -> 0 bytes
Packet.Any(nil) -> 1 byte

@thick atlas meant to tag you

Packet.Any is usually 1 byte longer for basic data types

[silent spire]

oh ye for tables its more

[rain rock]

yeah for tables it's a lot more

[silent spire]

especially nested

[rain rock]

yup

[silent spire]

what is it for tables

[rain rock]

cuz you need to encode the structure itself

not just the type information

so it takes more information

[silent spire]

like every key

[rain rock]

I never tried sending cyclic tables with packet

we should try that honestly rn

[silent spire]

https://tenor.com/view/ishowspeed-speed-i-show-speed-speed-stream-speed-thinking-gif-4948168091398377042

[rain rock]

Im not sure what algo does it use to encode tables

YOOOO

@silent spire

[silent spire]

works?

[rain rock]

overflowed

probably recursion

it doesn't support cyclic

I mean sending cyclic tables is a bad idea anyways

but yeah as expected it doesn't support it

so I think what it does is encode each key and value pair together. It start a key and a value a value can be another table and so on

[silent spire]

yea

[rain rock]

I think it goes like this

[Key][Value]

[Type][Value][Type][Value]

literally

[rain rock]

so it is

[TableStartType][Type][Value][Type][Value]...[TableEndType]

so you can start a new table by inserting the type 28

yeah guessed it

it's actually pretty efficient

it only uses 1 extra byte per table start command

so every nesting is 1 extra byte

[silent spire]

not that bad tbh

[rain rock]

should I write a ser des library based on packets?

like it's going to just have serialize and deserialize no writing to packets

and will work with whatever scheme you input

cuz I had this issue in RemoteTable-Light where I need to embed Packet itself fully even tho I only use ser/des

[silent spire]

have you tried other SerDes options

[rain rock]

which ones are there

[silent spire]

sera

serde

squash

tho you need to have like a Packet.Any option right

[rain rock]

sera doesn't have any

let me see other ones

[thick atlas]

thanks you 🌹

[mint laurel]

I use OkSerializer

[silent spire]

can you drop the link

[mint laurel]

No

I gate keep

(I’m not home)

[silent spire]

gg?

[mint laurel]

I think I had to like rip it out of a library on GitHub

[silent spire]

https://devforum.roblox.com/t/okserializer-yet-another-ok-schema-based-buffer-serializer/4004254

[mint laurel]

O peak

[silent spire]

it needs a schema tho

[mint laurel]

Yeah

It’s nice

pre define and plan your data

like packet

[mint laurel]

I hope it’s good

cause I use it in my work

[frozen oyster]

@gaunt field

[gaunt field]

😗

[past mist]

@ruby crypt can you add native unreliable remotes support without the wrapper

[silent spire]

its highly unlikely he will

and the wrapper isnt that complicated

#questions message

[rain rock]

@ruby crypt can you add a check for redeclaring packets and make some error messages more clear

If a different packet with same name is redeclared it should error imo

[silent spire]

agreed

[ruby crypt]

But we dont know what script runs first so it will build based on the first script

But maybe V2 should just use the module method

Without names

[rain rock]

no Im saying error when something is redefined

it makes no sense to define something twice

[ruby crypt]

Let's say you have 2 scripts

-- script A
local p = Packet("name", Packet.String)

-- script B
local p = Packet("name", Packet.String)

This won't error but both will point to the same packet and only the script that runs first will build the packet

[rain rock]

need to check the schema and see if they are same

Idk if you have a way to do that

[ruby crypt]

Maybe but in the future if I remove name and force you to define all packets in a module then the problem goes away

[rain rock]

yeah that would be great honestly

[ruby crypt]

But if your using the module method now you should not run into this problem already

[rain rock]

the problem is I sometimes forget to update the namespace

after duplicating a packet

and the namespace ends up being same as the other one

and now I have a packet firing that I didn't intend to

[ruby crypt]

K

[past mist]

Ik it isn’t but it’s inefficient compared to his reliable packet implementation as he batches the packets

[rain rock]

this one batches too

it's just a wrapper

packet runs same

wait nvm

batching unreliable is a bad idea

💀

imagine losing a packet

the entire point of unreliable is to get information across with least amount of header

[past mist]

No this ine makes one unreliable remote per packet

[past mist]

I see

[ruby crypt]

Right unreliable events are better not batched and sent with the smallest amount of data possible

[past mist]

I see. Also, small question. What if the exploiter modifies the buffer being sent, and somehow gets the other data type (somehow). So lets say server expects a vector for shooting packet but gets color3. then the server will crash, right?

[ruby crypt]

No the server will still get a vector3 but the numbers will be the same as the client sent for the color

Only if the buffer it shorter then expected then it will ignore the event

[past mist]

ah so no tamper at all is possible?

[ruby crypt]

Think of it like a long array of numbers

6,8,4,9,5,9,5,8,2,...

6 8 4 might be a vector3 or it might be 3 numbers or it might be a color3

Or maybe 6,8 is a vector2

The server loops through the numbers building the types it expects

[past mist]

ah okay

thank yuo

[ruby crypt]

A hacker can change the long array of numbers to be any numbers they want

But the server will still build the correct type from the numbers

[past mist]

how does it know hwat to build tho

oh

fromi the constructor

definition

mb

[dapper axle]

anyone know some big games that use packet

[ruby crypt]

https://tenor.com/view/eyebrows-wink-gif-16934333237090115195

[sand fern]

id actually wait before making any big reworks, luau team is heavily discussing the new Classes RFC

https://github.com/luau-lang/rfcs/pull/191
https://github.com/luau-lang/rfcs/blob/syntax-classes/docs/syntax-classes.md

[weary halo]

^ I doubt that matters, if it comes to release then it should be easy to make the change

• what happened to metatable OOP? Did we forget it exist?

[gloomy summit]

ask the engineers

[weary halo]

I don't think I should ask them

We got const in luau, so it's kinda inevitable we will get class in too

[gloomy summit]

true

https://cdn.discordapp.com/attachments/1491494318584889548/1491786497404178673/bon-the-walten-files.gif

[sand fern]

metatable OOP turned out to be horrible

and shared self types also turned out to be brittle

[mint laurel]

Why

[rain rock]

yeah and the fix for it is not class syntax

it's struct

I mean *records

[sand fern]

i dont really agree

it really depends in which context you think structs are better

structs are only really good if its supposed to be immutable and value-like

[long remnant]

what causes this warn to happen?

  17:49:16.975  [Net] Response thread not found for packet: SpawnVehicle discarding response: 0  -  Client - net:374

is it like unable to find the thread to resume?

[ruby crypt]

if a response times out then the client sends it then it wont exist anymore

do you have waits inside the event?

[long remnant]

the waits wasnt hte issue i had a mismatch going on with the request and response

thanks for responding tho

it fixed

[hot steeple]

What are the max values that "CFrameF24U8" can take?

[tribal terrace]

The Max for position its the 24 bit float max that its noted on the module and for the rotations It supports a full 360 angle with 1-3 decimals i think

[hot steeple]

o ok ok

[hot steeple]

is it possible to make an unreliable packet? (nvm found what i was looking for)