Support UDP?

[LivInTheLookingGlass]

It may take some effort, but it would be nice to support UDP. There will be some overhead, though, since we may need to avoid IP fragmentation. I'll tinker around a little in py2p and see if it works as-is, but I doubt it.

[LivInTheLookingGlass]

On the Python side of things it looks like it won't be too hard (fragmentation issues aside). It would just need a wrapper class of socket to deal with. Something like:

from socket import (socket, SOCK_DGRAM, error as SocketException)

class UDPSocket(object):
    def __init__(self):
        self.sock =  socket(type=SOCK_DGRAM)
        self.bind = sock.bind
        self.conn_addr = None

    def recv(self, size):
        if self.conn_addr is None:
            ret, self.conn_addr = self.sock.recvfrom(size)
            return ret
        else:
            return self.sock.recv(size)

    def send(self, data):
        if self.conn_addr is not None:
            self.sock.sendto(data, self.conn_addr)
        else:
            self.sock.send(data)  # potentially raises SocketException

This doesn't work in the current framework, since it has one node receiving all incoming data, but it would definitely work in the event based framework I'd like to switch to at some point. A similar thing can be done in Javascript, I imagine.

[LivInTheLookingGlass]

Javascript could probably support this pending p2p-today/js2p#4

It would require a mapping or two to make sure that the correct adapter gets called, but otherwise should work.