global time
import time

global recv
def recv(conn,l):
	start = time.process_time()
	timeo = conn.gettimeout()
	bytes = b""
	while l > 0:
		b = conn.recv(l)
		if b == b"": raise ConnectionResetError
		if time.process_time() - start > timeo: raise TimeoutError
		bytes += b
		l -= len(b)
	return bytes