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sender.py
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sender.py
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#python3
import time
from socket import socket, AF_INET, SOCK_DGRAM
import random
import sys
import os
import threading
import pickle
class PackageSTP:
def __init__(self, sequence, acknowledge, checksum,syn, ack, fin, data):
self.sequence = sequence
self.acknowledge = acknowledge
self.syn = syn
self.ack = ack
self.fin = fin
self.data = data
self.checksum=checksum
class sender:
def __init__(self,receiver_host_ip, receiver_port):
self.receiver_host_ip = receiver_host_ip
self.receiver_port = int(receiver_port)
self.transmitted=0
def flagNUM(self,S,A,F):
self.Flag=''
if S==True:
self.Flag+='S'
if A==True:
self.Flag+='A'
if F==True:
self.Flag+='F'
if S!=True and A!=True and F!= True:
self.Flag='D'
def handshake(self):
self.beginTime = time.time()
self.sendpacket(0, 0, True, False, False, '')
STPpacket = self.receivepacket()
if STPpacket.acknowledge == 1 and STPpacket.syn == True and STPpacket.ack == True and STPpacket.fin == False and STPpacket.data == '':
self.sendpacket(STPpacket.acknowledge, STPpacket.sequence+1 , False, True, False,'')
return (STPpacket.acknowledge,STPpacket.sequence+1,self.beginTime,self.transmitted)
def sendpacket(self,sequence, acknowledge, syn, ack, fin, data):
self.flagNUM(syn,ack,fin)
STPpacket = pickle.dumps(PackageSTP(sequence, acknowledge,0, syn, ack, fin, data))
self.transmitted+=1
socket.sendto(STPpacket, (self.receiver_host_ip, self.receiver_port))
log.write('{:10s}{:10.2f} {:5s}{:12d}{:12d}{:12d}\n'.format('snd',(time.time()-self.beginTime),self.Flag,sequence,len(data),acknowledge))
def receivepacket(self):
STPpacket, addr = socket.recvfrom(2048)
STPpacket = pickle.loads(STPpacket)
self.flagNUM(STPpacket.syn,STPpacket.ack,STPpacket.fin)
log.write('{:10s}{:10.2f} {:5s}{:12d}{:12d}{:12d}\n'.format('rcv',(time.time()-self.beginTime),self.Flag,STPpacket.sequence,len(STPpacket.data),STPpacket.acknowledge))
return STPpacket
class SendData:
def __init__(self,SeqStart,AckStart, receiver_host_ip, receiver_port, filename, MWS, MSS, gamma,beginTime,pDrop,pDuplicate, pCorrupt,pOrder,maxOrder,pDelay,maxDelay,seed):
self.receiver_host_ip = receiver_host_ip
self.receiver_port = int(receiver_port)
self.filename = filename
self.MWS = int(MWS) # max window size
self.MSS = int(MSS) # max segment size
self.gamma = int(gamma)
self.SeqStart=SeqStart
self.AckNOW=AckStart
self.beginTime=beginTime
self.Lock=threading.RLock()
self.pDrop=float(pDrop)
self.pDuplicate=float(pDuplicate)
self.pCorrupt=float(pCorrupt)
self.pOrder=float(pOrder)
self.maxOrder=int(maxOrder)
self.pDelay=float(pDelay)
self.maxDelay=int(maxDelay)
self.seed=seed
random.seed(self.seed)
self.EstimatedRTT=500/1000
self.DevRTT=250/1000
self.TimeoutInterval=self.EstimatedRTT+self.gamma*self.DevRTT
self.transmitted=0
self.PLDtotal=0
self.droptotal=0
self.corrupttotal=0
self.reordertotal=0
self.Duplicatedtotal=0
self.Delayedtotal=0
self.timeouttotal=0
self.fasttotal=0
self.DupACKtotal=0
def checksum(self,source_bin):
m = 0
max_count = (len(source_bin)//2) * 2
counter = 0
while counter < max_count:
val = source_bin[counter + 1] * 256 + source_bin[counter]
m = m + val
m = m & 0xffffffff
counter = counter + 2
if max_count < len(source_bin):
m = m + source_bin[len(source_bin) - 1]
m = (m >> 16) + (m & 0xffff)
m = m + (m >> 16)
checksum = ~m
checksum = checksum & 0xffff
return checksum
def flagNUM(self,S,A,F):
self.Flag=''
if A==True:
self.Flag+='A'
if F==True:
self.Flag+='F'
if S!=True and A!=True and F!= True:
self.Flag='D'
def Send(self,sequence,acknowledge,syn,ack,fin,data,s):
self.flagNUM(syn,ack,fin)
checksum=self.checksum(data)
STPpacket = pickle.dumps(PackageSTP(sequence, acknowledge,checksum, syn, ack, fin, data))
socket.sendto(STPpacket, (self.receiver_host_ip, self.receiver_port))
s='snd'+s
log.write('{:10s}{:10.2f} {:5s}{:12d}{:12d}{:12d}\n'.format(s,(time.time()-self.beginTime),self.Flag,sequence,len(data),acknowledge))
def Receive(self):
print('start 2')
self.DArcv={}
for i in self.packetNode:
self.DArcv[i]=0
Recived=[]
self.maxACK=0
while True:
STPpacket, addr = socket.recvfrom(2048)
STPpacket = pickle.loads(STPpacket)
self.flagNUM(STPpacket.syn,STPpacket.ack,STPpacket.fin)
if int(STPpacket.acknowledge)==len(self.data)+1:
self.notACK=[]
self.timestop=1
print('stop 2')
break
if STPpacket.acknowledge>self.maxACK:
self.maxACK=STPpacket.acknowledge
if STPpacket.acknowledge not in Recived:
Recived.append(STPpacket.acknowledge)
log.write('{:10s}{:10.2f} {:5s}{:12d}{:12d}{:12d}\n'.format('rcv',(time.time()-self.beginTime),self.Flag,STPpacket.sequence,len(STPpacket.data),STPpacket.acknowledge))
else:
self.DArcv[STPpacket.acknowledge]+=1
self.DupACKtotal+=1
log.write('{:10s}{:10.2f} {:5s}{:12d}{:12d}{:12d}\n'.format('rcv/DA',(time.time()-self.beginTime),self.Flag,STPpacket.sequence,len(STPpacket.data),STPpacket.acknowledge))
self.Lock.acquire()
if STPpacket.acknowledge-self.MSS in self.notACK:
self.Time=time.time()
if STPpacket.acknowledge-self.MSS in self.RTTstart:
SampleRTT=time.time()-self.RTTstart[STPpacket.acknowledge-self.MSS]
self.RTTstart={}
self.EstimatedRTT= 0.875*self.EstimatedRTT+0.125*SampleRTT
self.DevRTT=0.75*self.DevRTT+0.25*abs(SampleRTT-self.EstimatedRTT)
self.TimeoutInterval=self.EstimatedRTT+self.gamma*self.DevRTT
leng=len(self.notACK)
x=sorted(set(self.notACK)).index(STPpacket.acknowledge-self.MSS)
self.notACK=sorted(set(self.notACK))[x+1:]
self.rest+=(leng-len(self.notACK))*self.MSS
self.Lock.release()
else:
if self.DArcv[STPpacket.acknowledge]>=3:
if self.notinOrder==1:
self.numOrder+=1
self.DArcv[STPpacket.acknowledge]=0
self.rest+=len(self.packetNode[STPpacket.acknowledge])
self.PLD(STPpacket.acknowledge)
self.fasttotal+=1
self.Lock.release()
def PLD(self,tempseq):
if self.Dely==1 :
if len(self.packetNode[self.watingDelay[0]])<=self.rest and time.time()-self.timedelay>=self.t:
self.Send(self.watingDelay[0],self.AckNOW,False,False,False,self.watingDelay[1],'/Del')
self.transmitted+=1
self.PLDtotal+=1
self.Delayedtotal+=1
self.notACK.append(self.watingDelay[0])
if self.watingDelay[0]==tempseq:
self.rest-=len(self.packetNode[self.watingDelay[0]])
self.Dely=0
if self.notinOrder==1:
self.numOrder+=1
if self.notinOrder==1 :
if len(self.packetNode[self.watingorder[0]])<=self.rest and self.numOrder>=self.maxOrder:
self.Send(self.watingorder[0],self.AckNOW,False,False,False,self.watingorder[1],'/rord')
self.transmitted+=1
self.PLDtotal+=1
self.reordertotal+=1
self.notinOrder=0
self.notACK.append(self.watingorder[0])
self.numOrder=0
if self.watingorder[0]==tempseq:
self.rest-=len(self.packetNode[self.watingorder[0]])
if tempseq>=len(self.data):
return
if random.random() < self.pDrop:
if len(self.packetNode[tempseq])<=self.rest:
self.transmitted+=1
self.PLDtotal+=1
self.droptotal+=1
log.write('{:10s}{:10.2f} {:5s}{:12d}{:12d}{:12d}\n'.format('drop',(time.time()-self.beginTime),'D',tempseq,len(self.packetNode[tempseq]),self.AckNOW))
self.notACK.append(tempseq)
self.rest-=len(self.packetNode[tempseq])
if self.notinOrder==1:
self.numOrder+=1
else:
if random.random() < self.pDuplicate:
if len(self.packetNode[tempseq])<=self.rest and tempseq-self.MSS in self.packetNode:
# log.write('{:10s}{:10.2f} {:5s}{:12d}{:12d}{:12d}\n'.format('snd',(time.time()-self.beginTime),'D',tempseq,len(self.packetNode[tempseq]),self.AckNOW))
# log.write('{:10s}{:10.2f} {:5s}{:12d}{:12d}{:12d}\n'.format('snd/dup',(time.time()-self.beginTime),'D',tempseq,len(self.packetNode[tempseq]),self.AckNOW))
self.transmitted+=2
self.PLDtotal+=2
self.Duplicatedtotal+=1
self.Send(tempseq-self.MSS,self.AckNOW,False,False,False,self.packetNode[tempseq-self.MSS],'')
self.Send(tempseq-self.MSS,self.AckNOW,False,False,False,self.packetNode[tempseq-self.MSS],'/dup')
self.notACK.append(tempseq)
self.rest=self.rest-len(self.packetNode[tempseq])
if self.notinOrder==1:
self.numOrder+=1
else:
if random.random() < self.pCorrupt:
if len(self.packetNode[tempseq])<=self.rest:
self.flagNUM(False,False,False)
checksum=self.checksum(self.packetNode[tempseq])
STPpacket = pickle.dumps(PackageSTP(tempseq,self.AckNOW,checksum-1,False,False,False,self.packetNode[tempseq]))
if self.notinOrder==1:
self.numOrder+=1
self.transmitted+=1
self.PLDtotal+=1
self.corrupttotal+=1
socket.sendto(STPpacket, (self.receiver_host_ip, self.receiver_port))
log.write('{:10s}{:10.2f} {:5s}{:12d}{:12d}{:12d}\n'.format('snd/corr',(time.time()-self.beginTime),'D',tempseq,len(self.packetNode[tempseq]),self.AckNOW))
self.notACK.append(tempseq)
else:
if random.random() < self.pOrder and self.notinOrder==0 and self.Dely==0:
if len(self.packetNode[tempseq])<=self.rest:
self.notinOrder=1
if (len(self.key)-self.key.index(tempseq)-1)<self.maxOrder:
self.maxOrder=len(self.key)-self.key.index(tempseq)-1
self.watingorder=(tempseq,self.packetNode[tempseq])
else:
if random.random() < self.pDelay and self.notinOrder==0 and self.Dely==0:
if len(self.packetNode[tempseq])<=self.rest:
self.t=random.randint(0,self.maxDelay)/1000
self.timedelay=time.time()
self.watingDelay=(tempseq,self.packetNode[tempseq])
self.Dely=1
else:
if len(self.packetNode[tempseq])<=self.rest:
self.transmitted+=1
self.PLDtotal+=1
self.Send(tempseq,self.AckNOW,False,False,False,self.packetNode[tempseq],'')
if self.notinOrder==1:
self.numOrder+=1
self.notACK.append(tempseq)
def PLDsend(self):
if self.Dely==1 :
if len(self.packetNode[self.watingDelay[0]])<=self.rest and time.time()-self.timedelay>=self.t:
self.Send(self.watingDelay[0],self.AckNOW,False,False,False,self.watingDelay[1],'/Del')
self.transmitted+=1
self.PLDtotal+=1
self.Delayedtotal+=1
self.notACK.append(self.watingDelay[0])
self.rest-=len(self.packetNode[self.watingDelay[0]])
self.Dely=0
if self.notinOrder==1:
self.numOrder+=1
if self.notinOrder==1 :
if len(self.packetNode[self.watingorder[0]])<=self.rest and self.numOrder>=self.maxOrder:
self.Send(self.watingorder[0],self.AckNOW,False,False,False,self.watingorder[1],'/rord')
self.transmitted+=1
self.PLDtotal+=1
self.reordertotal+=1
self.notinOrder=0
self.notACK.append(self.watingorder[0])
self.rest-=len(self.packetNode[self.watingorder[0]])
self.numOrder=0
if self.seq>=len(self.data):
return
if random.random() < self.pDrop:
if len(self.packetNode[self.seq])<=self.rest:
self.transmitted+=1
self.PLDtotal+=1
self.droptotal+=1
log.write('{:10s}{:10.2f} {:5s}{:12d}{:12d}{:12d}\n'.format('drop',(time.time()-self.beginTime),'D',self.seq,len(self.packetNode[self.seq]),self.AckNOW))
self.notACK.append(self.seq)
self.rest-=len(self.packetNode[self.seq])
self.seq+=self.MSS
if self.notinOrder==1:
self.numOrder+=1
else:
if random.random() < self.pDuplicate:
if len(self.packetNode[self.seq])<=self.rest and self.seq-self.MSS in self.packetNode:
self.transmitted+=2
self.PLDtotal+=2
self.Duplicatedtotal+=1
# log.write('{:10s}{:10.2f} {:5s}{:12d}{:12d}{:12d}\n'.format('snd',(time.time()-self.beginTime),'D',self.seq,len(self.packetNode[self.seq]),self.AckNOW))
# log.write('{:10s}{:10.2f} {:5s}{:12d}{:12d}{:12d}\n'.format('snd/dup',(time.time()-self.beginTime),'D',self.seq,len(self.packetNode[self.seq]),self.AckNOW))
self.Send(self.seq,self.AckNOW,False,False,False,self.packetNode[self.seq],'')
self.Send(self.seq,self.AckNOW,False,False,False,self.packetNode[self.seq],'/dup')
self.notACK.append(self.seq)
self.rest=self.rest-1*len(self.packetNode[self.seq])
self.seq=self.seq+2*self.MSS
if self.notinOrder==1:
self.numOrder+=1
else:
if random.random() < self.pCorrupt:
if len(self.packetNode[self.seq])<=self.rest:
self.flagNUM(False,False,False)
checksum=self.checksum(self.packetNode[self.seq])
STPpacket = pickle.dumps(PackageSTP(self.seq,self.AckNOW,checksum-1,False,False,False,self.packetNode[self.seq]))
if self.notinOrder==1:
self.numOrder+=1
self.transmitted+=1
self.PLDtotal+=1
self.corrupttotal+=1
socket.sendto(STPpacket, (self.receiver_host_ip, self.receiver_port))
log.write('{:10s}{:10.2f} {:5s}{:12d}{:12d}{:12d}\n'.format('snd/corr',(time.time()-self.beginTime),'D',self.seq,len(self.packetNode[self.seq]),self.AckNOW))
self.notACK.append(self.seq)
self.rest-=len(self.packetNode[self.seq])
self.seq+=self.MSS
else:
if random.random() < self.pOrder and self.notinOrder==0 and self.Dely==0:
if len(self.packetNode[self.seq])<=self.rest:
self.notinOrder=1
if (len(self.key)-self.key.index(self.seq)-1)<self.maxOrder:
self.maxOrder=len(self.key)-self.key.index(self.seq)-1
self.watingorder=(self.seq,self.packetNode[self.seq])
self.seq+=self.MSS
else:
if random.random() < self.pDelay and self.notinOrder==0 and self.Dely==0:
if len(self.packetNode[self.seq])<=self.rest:
self.t=random.randint(0,self.maxDelay)/1000
self.timedelay=time.time()
self.watingDelay=(self.seq,self.packetNode[self.seq])
self.Dely=1
self.seq+=self.MSS
else:
if len(self.packetNode[self.seq])<=self.rest:
self.transmitted+=1
self.PLDtotal+=1
self.Send(self.seq,self.AckNOW,False,False,False,self.packetNode[self.seq],'')
if self.notinOrder==1:
self.numOrder+=1
self.notACK.append(self.seq)
self.rest-=len(self.packetNode[self.seq])
self.seq+=self.MSS
return
def payloadsend(self):
print('start 1')
self.seq=self.SeqStart
self.rest=self.MWS
self.notinOrder=self.numOrder=self.TimeStart=self.Dely=0
self.RTTstart={}
self.timedelay=time.time()
while True:
time.sleep(0.01)
if self.seq in self.packetNode :
self.Lock.acquire()
if self.RTTstart=={}:
self.RTTstart[self.seq]=time.time()
self.PLDsend()
if self.TimeStart==0:
self.Time=time.time()
self.TimeStart=1
self.Lock.release()
else:
print(self.Dely,'and',self.notinOrder,self.numOrder,'and rest',self.rest,'and',self.notACK)
if self.Dely!=0 or self.notinOrder!=0:
self.Lock.acquire()
self.PLDsend()
self.Lock.release()
else:
print('stop 1')
break
def timeout(self):
print('start 3')
while self.timestop==0:
time.sleep(0.001)
if time.time()-self.Time >= self.TimeoutInterval:
self.Lock.acquire()
self.timeouttotal+=1
self.rest+=len(self.packetNode[self.maxACK])
self.PLD(self.maxACK)
self.Time=time.time()
self.Lock.release()
print('stop 3')
def Transport(self):
self.packetNode = {}
self.key=[]
with open(self.filename, 'rb') as filename:
self.data = filename.read()
for i in range(0,int(len(self.data)/self.MSS+1)):
self.key.append(i*self.MSS+self.SeqStart)
if (i+1)*self.MSS<=len(self.data):
self.packetNode[i*self.MSS+self.SeqStart] = self.data[i*self.MSS:(i+1)*self.MSS]
else:
self.packetNode[i*self.MSS+self.SeqStart] = self.data[i*self.MSS:]
self.alreadysend=[]
self.alreadyreceive=[]
self.notACK=[]
self.timestop=0
self.Time=time.time()
l=[threading.Thread(target=self.payloadsend),threading.Thread(target=self.Receive),threading.Thread(target=self.timeout)]
for i in l:
i.start()
for j in l:
j.join()
if self.FIN(len(self.data)+1):
print('stop 123')
RT=[len(self.data),self.transmitted,self.PLDtotal,self.droptotal,self.corrupttotal,self.reordertotal,self.Duplicatedtotal,self.Delayedtotal,self.timeouttotal,self.fasttotal,self.DupACKtotal]
return(RT)
def FIN(self,finNUM):
self.finNUM=finNUM
self.transmitted+=1
self.Send(self.finNUM, 1, False, False, True, '','')
STPpacket, addr = socket.recvfrom(2048)
STPpacket = pickle.loads(STPpacket)
self.flagNUM(STPpacket.syn,STPpacket.ack,STPpacket.fin)
log.write('{:10s}{:10.2f} {:5s}{:12d}{:12d}{:12d}\n'.format('rcv',(time.time()-self.beginTime),self.Flag,STPpacket.sequence,len(STPpacket.data),STPpacket.acknowledge))
if STPpacket.acknowledge == self.finNUM+1 and STPpacket.syn == False and STPpacket.ack == True and STPpacket.fin == False:
STPpacket, addr = socket.recvfrom(2048)
STPpacket = pickle.loads(STPpacket)
self.flagNUM(STPpacket.syn,STPpacket.ack,STPpacket.fin)
log.write('{:10s}{:10.2f} {:5s}{:12d}{:12d}{:12d}\n'.format('rcv',(time.time()-self.beginTime),self.Flag,STPpacket.sequence,len(STPpacket.data),STPpacket.acknowledge))
if STPpacket.acknowledge == self.finNUM+1 and STPpacket.syn == False and STPpacket.ack == False and STPpacket.fin == True:
self.transmitted+=1
self.Send(STPpacket.acknowledge, 2, False, True, False, '','')
return True
def writelog():
global log
log= open('Sender_log.txt', "w")
Sender = sender(receiver_host_ip, receiver_port)
DataSeqStart,DataACKStart,beginTime,handshakesendnum=Sender.handshake()
Data = SendData(DataSeqStart,DataACKStart, receiver_host_ip, receiver_port, filename, MWS, MSS, gamma,beginTime, pdrop,pDuplicate, pCorrupt,pOrder,maxOrder,pDelay,maxDelay,seed)
L=Data.Transport()
L[1]+=handshakesendnum
log.write('===============================================================================\n')
log.write('{:50s}{:5d}\n'.format('Size of the file (in Bytes)', L[0]))
log.write('{:50s}{:5d}\n'.format('Segments transmitted (including drop & RXT)', L[1]))
log.write('{:50s}{:5d}\n'.format('Number of Segments handled by PLD', L[2]))
log.write('{:50s}{:5d}\n'.format('Number of Segments Dropped', L[3]))
log.write('{:50s}{:5d}\n'.format('Number of Segments Corrupted',L[4]))
log.write('{:50s}{:5d}\n'.format('Number of Segments Re-ordered', L[5]))
log.write('{:50s}{:5d}\n'.format('Number of Segments Duplicated', L[6]))
log.write('{:50s}{:5d}\n'.format('Number of Segments Delayed', L[7]))
log.write('{:50s}{:5d}\n'.format('Number of Retransmissions due to timeout', L[8]))
log.write('{:50s}{:5d}\n'.format('Number of Fast Retransmissions', L[9]))
log.write('{:50s}{:5d}\n'.format('Number of Duplicate Acknowledgements received', L[10]))
log.write('===============================================================================\n')
log.close()
if len(sys.argv)!=15:
print('python3 sender.py receiver_host_ip receiver_port filename MWS MSS gamma pdrop pDuplicate pCorrupt pOrder maxOrder pDelay maxDelay seed')
sys.exit()
receiver_host_ip = sys.argv[1]
receiver_port = sys.argv[2]
filename = sys.argv[3]
MWS = sys.argv[4]
MSS = sys.argv[5]
gamma = sys.argv[6]
pdrop = sys.argv[7]
pDuplicate =sys.argv[8]
pCorrupt=sys.argv[9]
pOrder=sys.argv[10]
maxOrder= sys.argv[11]
pDelay=sys.argv[12]
maxDelay=sys.argv[13]
seed = sys.argv[14]
socket = socket(AF_INET, SOCK_DGRAM)
writelog()