coolpackets

A python framework for sending and receiving custom packets

This is used for an extension to Ableton Live. I will add features as I need them for that project.

Usage example:

import socket
import time
from typing import Union, Optional, List

from coolpackets.packet import Packet, Connection, PacketManager


class MidiPacket(Packet):
    _packet_group = "mrs"
    _alias = "\x00"

    a = int
    b = Union[int, float]
    c_is_optional = Optional[int]

    def on_recv(self):
        print("RECEIVED MidiPacket!", self.a, self.b, self.c_is_optional)
        self.respond(UselessPacket(cool=["1", "2", "3"]))


class UselessPacket(Packet):
    _alias = "useless"
    # _dump = False

    cool = List[str]

    def on_recv(self):
        print("RECEIVED UselessPacket!")

    def encode(self) -> bytes:
        return b""

    @classmethod
    def decode(cls, data: bytes):
        return cls(cool=["nice", "cool"])


PacketManager.dump_packets("./packet_dumps/demo_packet_dump.py")


# setup
srv = socket.socket()
srv.bind(('', 9056))
srv.listen(1)

cli = socket.socket()
cli.connect(('localhost', 9056))
peer, addr = srv.accept()

conn1 = Connection(cli)
conn2 = Connection(peer, addr, {'mrs'})

# main logic
pck = MidiPacket(a=3, b=7.4)
conn1.send(pck, lambda p: print(f"RECEIVED RESPONSE: {p}"))

# time to process packets. Usually we wouldn't just close the sockets
time.sleep(.1)

# cleanup
conn1.close()
conn2.close()
srv.close()

print("Done")