122     def send(self, conn):  argument
124             self.seq = conn.seq()
126         self.pid = conn.pid
131         conn.send(hdr + self.payload)
142     def send_and_recv(self, conn):  argument
143         self.send(conn)
145             m = conn.recv()
226     def __init__(self, conn):  argument
227         self.conn = conn
231         m.send(self.conn)
232         m = self.conn.recv()