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snoipclient.py
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snoipclient.py
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#!/usr/bin/env python
# -*- coding: UTF-8 -*-
from __future__ import with_statement
import sys
import socket
import struct
import time
import Queue
from threading import Thread
from messages import *
from config import Codecs, ClientStatus
from decorators import printargs
class UdpClient(Thread):
def __init__(self, (host, port), recv_callback = None):
Thread.__init__(self)
self.host, self.port= host, port
self.socket = socket.socket(socket.AF_INET,
socket.SOCK_DGRAM, socket.IPPROTO_UDP)
self.recv_callback = recv_callback
def send(self, msg):
self.socket.sendto(msg, (self.host, self.port))
def close(self):
self.socket.close()
def run(self):
data = '^#$_@!#$'
while data:
data = self.socket.recv(1024*6)
print 'recieved: %d bytes' % len(data)
self.recv_callback and self.recv_callback(data)
class TcpClient(Thread):
def __init__(self, (host, port), recv_callback = None):
Thread.__init__(self)
#self.host, self.port= host, port
self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
self.socket.connect((host, port))
self.recv_callback = recv_callback
def send(self, msg):
self.socket.send(msg)
def run(self):
data = '^#$_@!#$'
while data:
data = self.socket.recv(1024*6)
print 'recieved: %d bytes' % len(data)
self.recv_callback and self.recv_callback(data)
def close(self):
self.socket.close()
class SnoipClient(object):
def __init__(self, (host, port)):
self.call_ctx = None
self.client_ctx = None
self.username = None
self.client = UdpClient((host, port), self.recv)
self.parser = Parser()
self.client.start()
def recv(self, data):
msg_type, buf = self.parser.body(data)
print 'msg_type', repr(msg_type)
if msg_type in MessageTypes:
msg = MessageTypes[msg_type](buf=buf)
if isinstance(msg, LoginReply):
self.login_reply(msg)
elif isinstance(msg, ServerForwardInvite):
self.ack_invite(msg)
elif isinstance(msg, ServerForwardRing):
self.invited_ctx = msg.client_ctx.value
self.call_ctx = msg.call_ctx.value
print 'ringing...'
elif isinstance(msg, ClientAnswer):
self.invited_ctx = msg.client_ctx.value
print 'call was answered by other party...'
elif isinstance(msg, ClientRTP):
self.rtp_received(msg)
elif isinstance(msg, (HangupRequest)):
self.ack_hangup()
def login(self, username, password):
self.username = username
print 'snoipclient-login'
data = create_login_msg(username, password)
self._send(data)
def login_reply(self, msg):
print 'snoipclient-login_reply'
self.client_ctx = msg.client_ctx.value
self.client_public_ip = msg.client_public_ip.value
self.client_public_port = msg.client_public_port.value
def invite(self, username):
print 'snoipclient-invite'
data = create_invite(self.client_ctx, username)
self._send(data)
def ack_invite(self, sfi):
print 'snoipclient-ack_invite'
self.call_ctx = sfi.call_ctx.value
data = client_invite_ack(sfi)
self._send(data)
time.sleep(3)
self.answer()
def answer(self):
print 'snoipclient-answer'
ca = ClientAnswer()
ca.set_values(client_ctx=self.client_ctx,
call_ctx=self.call_ctx, codec=Codecs.values()[0])
print 'answering a ring of call_ctx:', repr(self.call_ctx)
self._send(ca.pack())
def _send(self, data):
self.client.send(data)
def feed_rtp(self, rtp_bytes, seq):
crtp = ClientRTP()
crtp.set_values(client_ctx=self.invited_ctx, call_ctx=self.call_ctx,
sequence=seq, rtp_bytes_length=len(rtp_bytes), rtp_bytes=rtp_bytes)
self._send(crtp.pack())
def rtp_received(self, msg):
bytes = msg.rtp_bytes.value
with open(self.username + '_incoming_rtp', 'a') as f:
f.write(bytes + '\n')
def send_keep_alive(self):
ka = KeepAlive()
ka.set_values( client_ctx = self.client_ctx,
client_public_ip=self.client_public_ip,
client_public_port=self.client_public_port)
self._send(ka.pack())
def request_hangup(self):
request = HangupRequest()
request.set_values(client_ctx = self.client_ctx,
call_ctx = self.call_ctx)
self._send(request.pack())
print 'requesting hangup'
def ack_hangup(self):
ack = HangupRequestAck()
ack.set_values(client_ctx = self.client_ctx, call_ctx = self.call_ctx)
self._send(ack.pack())
print 'acking hangup'
def create_login_msg(username, password='0'*20):
header = '\xab\xcd'
trailer = '\xdc\xba'
msg_type = '\x00\x02'
username_length = struct.pack('!b', len(username))
username = struct.pack('!%dc' % len(username), *(username))
password = struct.pack('!20c',*(password))
ip = struct.pack('!16b', *(0 for i in xrange(16)))
port = struct.pack('!i', 0)
msg_length = struct.pack('!h',
sum(map(
lambda i: len(i),
(username_length, username, password, ip, port))))
msg = header + msg_type + msg_length + username_length + \
username + password + ip + port + trailer
return msg
def create_invite(ctx, username):
ci = ClientInvite()
ci.set_values(
client_ctx = ctx,
calle_name_length = len(username),
calle_name = username,
num_of_codecs = len(Codecs.values()),
codec_list = ''.join(Codecs.values()))
return ci.pack()
def client_invite_ack(invite):
cia = ClientInviteAck()
cia.set_values(
client_ctx = invite.client_ctx.value,
call_ctx = invite.call_ctx.value,
client_status = ClientStatus.Ringing,
client_public_ip = invite.client_public_ip.value,
client_public_port = invite.client_public_port.value
)
print 'client ack invite of call_ctx:', repr(invite.call_ctx.value)
return cia.pack()