1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
# Copyright (c) 2011 Nicira Networks
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
tcp module contains listener and sender classes for TCP protocol
"""
from twisted.internet.protocol import Factory, ClientFactory, Protocol
from twisted.internet import interfaces
from zope.interface import implements
import time
class TcpListenerConnection(Protocol):
"""
This per-connection class is instantiated each time sender connects
"""
def __init__(self):
self.stats = 0
def connectionMade(self):
print "Started TCP Listener connection"
def dataReceived(self, data):
self.stats += len(data)
def connectionLost(self, reason):
print "Stopped TCP Listener connection"
self.factory.stats += self.stats
class TcpListenerFactory(Factory):
"""
This per-listening socket class is used to
instantiate TcpListenerConnections
"""
protocol = TcpListenerConnection
def __init__(self):
self.stats = 0
def startFactory(self):
print "Starting TCP listener factory"
def stopFactory(self):
print "Stopping TCP listener factory"
def getResults(self):
""" returns the number of bytes received as string"""
#XML RPC does not support 64bit int (http://bugs.python.org/issue2985)
#so we have to convert the amount of bytes into a string
return str(self.stats)
class Producer(object):
implements(interfaces.IPushProducer)
"""
This producer class generates infinite byte stream for a specified time
duration
"""
def __init__(self, proto, duration):
self.proto = proto
self.start = time.time()
self.produced = 0
self.paused = False
self.data = "X" * 65535
self.duration = duration
def pauseProducing(self):
"""This function is called whenever write() to socket would block"""
self.paused = True
def resumeProducing(self):
"""This function is called whenever socket becomes writable"""
self.paused = False
current = time.time()
while (not self.paused) and (current < self.start + self.duration):
self.proto.transport.write(self.data)
self.produced += len(self.data)
current = time.time()
if current >= self.start + self.duration:
self.proto.factory.stats += self.produced
self.proto.transport.unregisterProducer()
self.proto.transport.loseConnection()
def stopProducing(self):
pass
class TcpSenderConnection(Protocol):
"""
TCP connection instance class that sends all traffic at full speed.
"""
def connectionMade(self):
print "Started TCP sender connection"
producer = Producer(self, self.factory.duration)
self.transport.registerProducer(producer, True)
producer.resumeProducing()
def dataReceived(self, data):
print "Sender received data!", data
self.transport.loseConnection()
def connectionLost(self, reason):
print "Stopped TCP sender connection"
class TcpSenderFactory(ClientFactory):
"""
This factory is responsible to instantiate TcpSenderConnection classes
each time sender initiates connection
"""
protocol = TcpSenderConnection
def __init__(self, duration):
self.duration = duration
self.stats = 0
def startFactory(self):
print "Starting TCP sender factory"
def stopFactory(self):
print "Stopping TCP sender factory"
def getResults(self):
"""Returns amount of bytes sent to the Listener (as a string)"""
return str(self.stats)
|
