def test_send_and_ack2_tahoe(self):
tcp = TcpProtocol( DEFAULT_SSHTRESH , DEFAULT_MSS , False )
pack = tcp.next_to_send()
base = pack[0]
self.assertEqual( pack[1] , -1 )
tcp.send( DEFAULT_MSS )
pack = tcp.next_to_send( )
self.assertEqual( pack , (base,DEFAULT_MSS) )
tcp.send( DEFAULT_MSS )
self.assertEqual( pack , tcp.do_send( ) )
self.assertEqual( tcp.next_to_send( ) , (base+2*DEFAULT_MSS,-1) )
tcp.ack( base+DEFAULT_MSS )
self.assertEqual( tcp.next_to_send( ) , (base+DEFAULT_MSS,DEFAULT_MSS) )
self.assertEqual( (base+DEFAULT_MSS,DEFAULT_MSS) , tcp.do_send( ) )
self.assertEqual( tcp.next_to_ack( ) , base+(2*DEFAULT_MSS) )
def test_send_and_ack_tahoe(self):
tcp = TcpProtocol( DEFAULT_SSHTRESH , DEFAULT_MSS , False )
pack = tcp.next_to_send()
self.assertEqual( pack[1] , -1 )
tcp.send( DEFAULT_MSS )
pack = tcp.next_to_send( )
self.assertEqual( pack[1] , DEFAULT_MSS )
self.assertEqual( pack , tcp.do_send( ) )
self.assertEqual( tcp.next_to_send( ) , (pack[0]+pack[1],-1) )
self.assertEqual( tcp.next_to_ack( ) , pack[0]+pack[1] )
# tcp.ack( DEFAULT_MSS )
# attivare per testare il modulo 2
tcp.ack( tcp.sendBase + DEFAULT_MSS )
self.assertEqual( tcp.next_to_ack( ) , -1 )
self.assertEqual( tcp.get_cwnd( ) , 2*DEFAULT_MSS )
def test_init_tahoe(self):
tcp = TcpProtocol( DEFAULT_SSHTRESH , DEFAULT_MSS , False )
self.assertEqual( tcp.get_ssthresh( ) , DEFAULT_SSHTRESH )
self.assertEqual( tcp.get_cwnd( ) , DEFAULT_MSS )
self.assertEqual( tcp.next_to_ack( ) , -1 )
pack = tcp.next_to_send()
self.assertEqual( pack[1] , -1 )
self.assertEqual( tcp.get_duplicated_ack_count( ) , 0 )
def test_fast_recovery_reno3( self ):
packet_size = DEFAULT_MSS/4
tcp = TcpProtocol( DEFAULT_SSHTRESH , DEFAULT_MSS , True )
pack = tcp.next_to_send( )
base = pack[0]
self.assertEqual( pack[1] , -1 )
tcp.send( packet_size )
tcp.send( packet_size )
tcp.send( packet_size )
tcp.send( packet_size )
pack = tcp.next_to_send( )
self.assertEqual( pack , (base,packet_size) )
self.assertEqual( tcp.do_send( ) , pack )
self.assertEqual( tcp.next_to_send( ) , (base+packet_size,packet_size) )
self.assertEqual( tcp.do_send( ) , (base+packet_size,packet_size) )
self.assertEqual( tcp.next_to_send( ) , (base+2*packet_size,packet_size) )
self.assertEqual( tcp.do_send( ) , (base+2*packet_size,packet_size) )
self.assertEqual( tcp.next_to_send( ) , (base+3*packet_size,packet_size) )
self.assertEqual( tcp.do_send( ) , (base+3*packet_size,packet_size) )
tcp.ack( base+packet_size )
tcp.ack( base+packet_size )
tcp.ack( base+packet_size )
self.assertEqual( tcp.get_duplicated_ack_count( ) , 2 )
tcp.ack( base+packet_size )
self.assertEqual( tcp.get_duplicated_ack_count( ) , 3 )
self.assertEqual( tcp.get_cwnd( ) , DEFAULT_MSS+3*DEFAULT_MSS )
self.assertEqual( tcp.next_to_send() , (base+packet_size,packet_size))
tcp.ack( base+packet_size )
tcp.ack( base+4*packet_size )
self.assertEqual( tcp.get_cwnd( ) , DEFAULT_MSS )
tcp.do_send( )
self.assertEqual( tcp.next_to_send( ) , (base+4*packet_size,-1) )
def test_cumulative_ack_reno(self):
packet_size = DEFAULT_MSS/2
tcp = TcpProtocol( DEFAULT_SSHTRESH , DEFAULT_MSS , True )
pack = tcp.next_to_send()
base = pack[0]
self.assertEqual( pack[1] , -1 )
tcp.send( packet_size )
tcp.send( packet_size )
pack = tcp.next_to_send( )
self.assertEqual( pack , (base,packet_size) )
tcp.send( packet_size )
tcp.do_send( )
self.assertEqual( tcp.next_to_send( ) , (base+packet_size,packet_size) )
tcp.do_send( )
self.assertEqual( tcp.next_to_send( ) , (base+3*packet_size,-1) )
self.assertEqual( tcp.next_to_ack( ) , base+packet_size )
tcp.ack( base+2*packet_size )
self.assertEqual( tcp.next_to_ack( ) , -1 )
self.assertEqual( tcp.get_cwnd( ) , 2*DEFAULT_MSS )
tcp.ack( base+packet_size )
self.assertEqual( tcp.get_cwnd( ) , 3*DEFAULT_MSS )
