[python] Работа с сокетами

#!/usr/bin/env python
# -*- coding: utf-8 -*-
 
import socket

ohost = "smtp.mail.ru"
oport = 25
 
o = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
o.connect((ohost, oport))

def send(data):
    o.send(data)
    return o.recv(1024)

def getline():
    t=sock.recv(1024)
    out=""
    while t!="\r\n":
        out=out+t
        t=sock.recv(1024)
    return out

host = "localhost"
port = 1025
 
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind((host, port))
s.listen(5)
sock, addr = s.accept()
while True:
    buf = getline()
    print buf
    if buf == "exit":
        sock.send("bye")
        break
    elif buf:
        sock.send(send(buf))
sock.close()