def main():
parser = OptionParser(option_class=eng_option, conflict_handler="resolve")
parser.add_option("",
"--PHYport",
type="intx",
default=8013,
help="PHY communication socket port, [default=%default]")
parser.add_option("",
"--MACport",
type="intx",
default=8001,
help="MAC communication socket port, [default=%default]")
parser.add_option(
"-i",
"--interp",
type="intx",
default=10,
help="USRP2 interpolation factor value, [default=%default]\
5 -> 802.11a/g, OFDM T_Symbol=4us, \
10 -> 802.11p, OFDM T_Symbol=8us")
parser.add_option("",
"--regime",
type="string",
default="5",
help="OFDM regimecode [default=%default]\
1 -> 6 (3) Mbit/s (BPSK r=0.5), \
2 -> 9 (4.5) Mbit/s (BPSK r=0.75), \
3 -> 12 (6) Mbit/s (QPSK r=0.5), \
4 -> 18 (9) Mbit/s (QPSK r=0.75), \
5 -> 24 (12) Mbit/s (QAM16 r=0.5), \
6 -> 36 (18) Mbit/s (QAM16 r=0.75), \
7 -> 48 (24) Mbit/s (QAM64 r=0.66), \
8 -> 54 (27) Mbit/s (QAM64 r=0.75)")
parser.add_option("-n",
"--node",
type="intx",
default=1,
help="Number of USRP2 node, [default=%default]")
parser.add_option("",
"--beta",
type="float",
default=150000,
help="Scaling Time Parameter, [default=%default]")
parser.add_option("-t",
"--time_slot",
type="float",
default=9e-6,
help="Time slot value, [default=%default]")
parser.add_option(
"-B",
"--BI",
type="float",
default=1,
help="Beacon Interval (BI) value in seconds, [default=%default]")
parser.add_option(
"-S",
"--SIFS",
type="float",
default=16e-6,
help="Short Inter-frame space (SIFS) value, [default=%default]")
parser.add_option('',
"--retx",
action="store_true",
default=False,
help="Retransmissions enabled, [default=%default]")
parser.add_option('',
"--RTS",
action="store_true",
default=False,
help="RTS-threshold enabled, [default=%default]")
parser.add_option('-v',
"--V",
action="store_true",
default=True,
help="Print debug information, [default=%default]")
(options, args) = parser.parse_args()
my_mac = MAC.usrp2_node(options.node) # MAC address for this node
dest_mac = MAC.usrp2_node(
2) # Dummy value (updated when an incoming packet arrives)
beta = options.beta # scaling time parameter
tslot = options.time_slot * beta
SIFS = options.SIFS * beta
DIFS = SIFS + 2 * tslot
Preamble = DIFS #16e-6
PLCP_header = 4e-6 * beta
ACK_time = Preamble + PLCP_header
CW_min = 15
CW_max = 1023
RTS_THRESHOLD = 150
dot11FragmentationTh = 1036
# TX time estimation for a CTS and an ACK packet
empty_values = {"duration": 0, "mac_ra": my_mac, "timestamp": time.time()}
CTS_empty = MAC.generate_pkt("CTS", options.interp, options.regime,
empty_values)
T_cts = CTS_empty["INFO"]["txtime"]
ACK_empty = MAC.generate_pkt("ACK", options.interp, options.regime,
empty_values)
T_ack = ACK_empty["INFO"]["txtime"]
# Set socket ports
PHY_port = options.PHYport
#PHYRX_port = options.PHYRXport
MAC_port = options.MACport
# Variables involving MAC tests
testing = False # Testing mode active, used to conduct trials
N_TESTS = 1000 # Number of tests
N_TESTS_INI = N_TESTS
LONG_TESTS = 20 # Payload length for tests
payload_test = "0000" + LONG_TESTS * '1' # Payload for tests
test_with_sensing = True # Carrier Sensing (CS) allowed during the test
total_processing_time = 0 # Total processing time
t_sense_mean = 0 # CS average time
t_csense = 0 # CS time
t_MAC = 0 # MAC time
t_MAC_mean = 0 # MAC average time
packet_i = 0 # Packets sent counter
n_sensing = 0 # Number of CS performed
# 'State' controls the state of the MAC
State = "IDLE"
# Initial Conditions of the Finite State Machine
NAV = 0 # Network Allocation Vector
N_RETRIES = 0 # Retries to send a packet counter
busy_in_wfd = False # Busy in Wait_for_DIFS state
BO_frozen = "NO" # Backoff frozen
TX_attempts = 0 # Tries to send a packet counter
CTS_failed = False # CTS reception failed
chan = "FREE" # Channel state = IDDLE
N_SEQ = 0 # Sequence number counter
N_FRAG = 0 # Fragment number counter
first_tx = True # Is the first attempt to send a packet?
frag_count = 0 # Counter used during fragmentation
data_temp_reass = "" # Initial variable to perform de re-assembly process
verbose = True # Shows when the MAC is in 'IDDLE' state
beaconing = False # Is ON the Beaconing process?
fragmenting = 0 # Is the packet received a fragment?
if options.V:
print "============================================="
print " \t MAC layer: DCF + RTS/CTS"
print "============================================="
print "MAC address:", MAC.which_dir(my_mac)
print "Rate = ", options.regime
print "tslot(s): %f \t SIFS(s): %f" % (tslot, SIFS)
print "DIFS(s): %f \t T_ACK(s): %f" % (DIFS, ACK_time)
print "pseudo-random exp. BACKOFF [%i,%i]" % (CW_min, CW_max)
if options.RTS:
print "RTS/CTS: enabled"
print "\t with RTS Threshold(Bytes): %i \t" % RTS_THRESHOLD
else:
print "RTS/CTS: disabled"
print "Fragmentation Threshold (Bytes):", dot11FragmentationTh
if options.retx: print "Retransmissions: enabled"
else: print "Retransmissions: disabled"
print "Scaling time parameter = ", beta
print "============================================="
def RX_Client(options, my_mac, phy_rx_server):
print "RX_client is waiting for the wireless medium!!!!!!!!!!!!!"
phy_rx_client, phy_rx_addr = phy_rx_server.accept()
while 1:
#phy_rx_client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
#phy_rx_client.connect((socket.gethostname(), options.PHYRXport))
# PHY 802.11 frame arrival from the wireless medium
pkt = phy_rx_client.recv(10000)
arrived_packet = mac.parse_mac(pkt)
print "PHY 802.11 frame arrival from the wireless medium!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
if (arrived_packet["HEADER"] == "DATA"
or arrived_packet["HEADER"] == "DATA_FRAG"):
if arrived_packet["DATA"]["INFO"][
"mac_add1"] == my_mac: # Is the data packet addressed to this node?
data.push(arrived_packet["DATA"])
else:
other.push("random data")
if (arrived_packet["HEADER"] == "ACK"):
if arrived_packet["DATA"]["INFO"][
"RX_add"] == my_mac: # Is the ACK addressed to this node?
ack.push(arrived_packet["DATA"])
if (arrived_packet["HEADER"] == "RTS"): #It is a RTS
rts.push(arrived_packet["DATA"])
if (arrived_packet["HEADER"] == "CTS"): #It is a CTS
cts.push(arrived_packet["DATA"])
if (arrived_packet["HEADER"] == "BEACON"): #It is a BEACON
beacon = arrived_packet["DATA"]
beacon = beacon["INFO"]
msg = plcp.new_beacon()
msg["MAC"] = beacon["mac_add2"]
msg["timestamp"] = beacon["timestamp"]
msg["BI"] = beacon["BI"]
msg["OFFSET"] = time.time() - beacon["timestamp"]
x = bcn.length()
updated = False
# Update the beacon list
for i in range(0, x):
if msg["MAC"] == bcn.read(i)["MAC"]:
bcn.remove(i)
bcn.insert(i, msg)
updated = True
if updated == False:
bcn.insert(x + 1, msg)
if (arrived_packet["HEADER"] == ""):
print "No packet arrived"
#DEBUG
print "=========== BUFFER STATUS ==========="
print "DATA [%i]" % data.length()
print "ACK [%i]" % ack.length()
print "RTS [%i]" % rts.length()
print "CTS [%i]" % cts.length()
print "OTHER [%i]" % other.length()
print "====================================="
print "\n\n"
# Beacon list
print "========= NEIGHBOR NODES INFORMATION =========="
for i in range(0, bcn.length()):
item = bcn.read(i)
print "[MAC = %s]\t [Timestamp = %s]\t [Beacon Interval = %s]\t [OFFSET = %s]" % (
mac.which_dir(item["MAC"]), item["timestamp"], item["BI"],
item["OFFSET"])
print "==============================================="
phy_rx_client.close()
def main():
parser = OptionParser(option_class=eng_option, conflict_handler="resolve")
parser.add_option("", "--PHYport", type="intx", default=8013,
help="PHY communication socket port, [default=%default]")
parser.add_option("", "--MACport", type="intx", default=8001,
help="MAC communication socket port, [default=%default]")
parser.add_option("-i", "--interp", type="intx", default=10,
help="USRP2 interpolation factor value, [default=%default]\
5 -> 802.11a/g, OFDM T_Symbol=4us, \
10 -> 802.11p, OFDM T_Symbol=8us")
parser.add_option("", "--regime", type="string", default="1",
help="OFDM regimecode [default=%default]\
1 -> 6 (3) Mbit/s (BPSK r=0.5), \
2 -> 9 (4.5) Mbit/s (BPSK r=0.75), \
3 -> 12 (6) Mbit/s (QPSK r=0.5), \
4 -> 18 (9) Mbit/s (QPSK r=0.75), \
5 -> 24 (12) Mbit/s (QAM16 r=0.5), \
6 -> 36 (18) Mbit/s (QAM16 r=0.75), \
7 -> 48 (24) Mbit/s (QAM64 r=0.66), \
8 -> 54 (27) Mbit/s (QAM64 r=0.75)")
parser.add_option("-n", "--node", type="intx", default=1,
help="Number of USRP2 node, [default=%default]")
parser.add_option("", "--beta", type="float", default=50000,
help="Scaling Time Parameter, [default=%default]")
parser.add_option("-t", "--time_slot", type="float", default=9e-6,
help="Time slot value, [default=%default]")
parser.add_option("-B", "--BI", type="float", default=1,
help="Beacon Interval (BI) value in seconds, [default=%default]")
parser.add_option("-S", "--SIFS", type="float", default=16e-6,
help="Short Inter-frame space (SIFS) value, [default=%default]")
parser.add_option('', "--retx", action="store_true", default=False,
help="Retransmissions enabled, [default=%default]")
parser.add_option('', "--RTS", action="store_true", default=True,
help="RTS-threshold enabled, [default=%default]")
parser.add_option('-v', "--V", action="store_true", default=False,
help="Print debug information, [default=%default]")
(options, args) = parser.parse_args ()
my_mac = MAC.usrp2_node(options.node) # MAC address for this node
dest_mac = MAC.usrp2_node(2) # Dummy value (updated when an incoming packet arrives)
"""
IEEE 802.11-a MAC parameters
"""
beta = options.beta # scaling time parameter
tslot = options.time_slot * beta
SIFS = options.SIFS * beta
DIFS = SIFS + 2 * tslot
Preamble = DIFS #16e-6
PLCP_header = 4e-6 * beta
ACK_time = Preamble + PLCP_header
CW_min = 15
CW_max = 1023
RTS_THRESHOLD = 150
dot11FragmentationTh = 1036
# TX time estimation for a CTS and an ACK packet
empty_values = {"duration":0, "mac_ra":my_mac, "timestamp":time.time()}
CTS_empty = MAC.generate_pkt("CTS", options.interp, options.regime, empty_values)
T_cts = CTS_empty["INFO"]["txtime"]
ACK_empty = MAC.generate_pkt("ACK", options.interp, options.regime, empty_values)
T_ack = ACK_empty["INFO"]["txtime"]
# Set socket ports
PHY_port = options.PHYport
#PHYRX_port = options.PHYRXport
MAC_port = options.MACport
# Variables involving MAC tests
testing = False # Testing mode active, used to conduct trials
N_TESTS = 1000 # Number of tests
N_TESTS_INI = N_TESTS
LONG_TESTS = 20 # Payload length for tests
payload_test = "0000" + LONG_TESTS*'1' # Payload for tests
test_with_sensing = True # Carrier Sensing (CS) allowed during the test
total_processing_time = 0 # Total processing time
t_sense_mean = 0 # CS average time
t_csense = 0 # CS time
t_MAC = 0 # MAC time
t_MAC_mean = 0 # MAC average time
packet_i=0 # Packets sent counter
n_sensing = 0 # Number of CS performed
# 'State' controls the state of the MAC
State = "IDLE"
# Initial Conditions of the Finite State Machine
NAV = 0 # Network Allocation Vector
N_RETRIES = 0 # Retries to send a packet counter
busy_in_wfd = False # Busy in Wait_for_DIFS state
BO_frozen = "NO" # Backoff frozen
TX_attempts = 0 # Tries to send a packet counter
CTS_failed = False # CTS reception failed
chan = "FREE" # Channel state = IDDLE
N_SEQ = 0 # Sequence number counter
N_FRAG = 0 # Fragment number counter
first_tx = True # Is the first attempt to send a packet?
frag_count = 0 # Counter used during fragmentation
data_temp_reass = "" # Initial variable to perform de re-assembly process
verbose = True # Shows when the MAC is in 'IDDLE' state
beaconing = False # Is ON the Beaconing process?
fragmenting = 0 # Is the packet received a fragment?
if options.V:
print "============================================="
print " \t MAC layer: DCF + RTS/CTS"
print "============================================="
print "MAC address:",MAC.which_dir(my_mac)
print "Rate = ",options.regime
print "tslot(s): %f \t SIFS(s): %f"%(tslot,SIFS)
print "DIFS(s): %f \t T_ACK(s): %f"%(DIFS, ACK_time)
print "pseudo-random exp. BACKOFF [%i,%i]"%(CW_min, CW_max)
if options.RTS:
print "RTS/CTS: enabled"
print "\t with RTS Threshold(Bytes): %i \t" %RTS_THRESHOLD
else: print "RTS/CTS: disabled"
print "Fragmentation Threshold (Bytes):",dot11FragmentationTh
if options.retx: print "Retransmissions: enabled"
else: print "Retransmissions: disabled"
print "Scaling time parameter = ",beta
print "============================================="
print "MAC receives a BEACON from upper buffer......"
beaconing = True
if options.V:
print "| IDLE | Transmit BEACON FRAME | WAIT_FOR_NAV |"
State = "TRANSMITTING_RTS"
elif reply_up == "NO":
# is a CTS?
print "Buffer has no DATA!!!....."
reply_phy2, packet_phy2 = MAC.read_phy_response(
PHY_port, "CTS")
if reply_phy2 == "YES":
verbose = True
copied = packet_phy2
x = copied["INFO"]
print "[R]-[%s]-[DA:%s]-[duration:%f]-[IFM:0]" % (
copied["HEADER"], MAC.which_dir(
x["RX_add"]), x["txtime"])
tiempo = x["txtime"] / 1.0e3
if options.V:
print "| IDLE | CTS captured (update NAV) | IDLE |"
NAV = MAC.update_NAV(time.time(), tiempo, tslot)
State = "IDLE"
else:
##The following is newly added...
reply_phy3, packet_phy3 = MAC.read_phy_response(
PHY_port, "DATA")
if reply_phy3 == "YES":
WF_DATA_first_time = 1
State = "WAITING_FOR_DATA"
if options.V:
print "| IDLE | DATA received | WAITING_FOR_DATA |"
#############################
'''
#============================================================
# /TEST/ UNCOMMENT TO CHECK RTS/CTS FUNCTIONALITY
#============================================================
# STEP 3/4: Node 1 --> DATA
values = {"payload":"Paquete_que_llega12", "address1":x["mac_add1"], "address2":x["mac_add2"], "N_SEQ":N_SEQ, "N_FRAG":0, "timestamp":time.time()}
DATA_forced = MAC.generate_pkt("DATA", options.interp, options.regime, values)
packet_DATA_forced = MAC.create_packet("PKT", DATA_forced)
MAC.transmit(packet_DATA_forced, PHY_port)
time.sleep(2*tslot)
#============================================================
'''
dest_mac = x["mac_add2"]
if x["MF"]==0: #More Fragments = 0
if fragmenting == 0: # Not a fragmented packet
print "[R]-[DATA]-[DA:%s]-[SA:%s]-[MF:0]-[IFM:1]-[PAYLOAD = %s]" %(MAC.which_dir(x["mac_add1"]),MAC.which_dir(x["mac_add2"]),x["PAYLOAD"])
if options.V: print "| WAITING_FOR_DATA | DATA received | TRANSMITTING_ACK |"
State = "TRANSMITTING_ACK"
WF_DATA_first_time = 1
frag_count = 0
MAC.send_ul_buff_packet(MAC_port, x["PAYLOAD"])
else: # Last fragmented packet
fragmenting = 0
frag_count +=1
print "[R]-[FRAGMENTED DATA]-[DA:%s]-[SA:%s]-[MF:0]-[#seq:%i]-[#frag:%i]-[IFM:1]-[PAYLOAD = %s]" %(MAC.which_dir(x["mac_add2"]),MAC.which_dir(my_mac),x["N_SEQ"],x["N_FRAG"],x["PAYLOAD"])
test_seq = x["N_FRAG"]+1 - frag_count
if test_seq == 0:
dato_leido = data_temp_reass + x["PAYLOAD"]
State = "TRANSMITTING_ACK"
WF_DATA_first_time = 1
frag_count = 0
def run(self):
pkt = self.socket.recv(1000)
paquete_llegada = pickle.loads(pkt)
# MAC requests an incoming packet to the PHY
if (paquete_llegada["TIPO"]=="COLA"):
tipo_pkt = paquete_llegada["DATOS"]
len_data = self.data.longitud()
len_ack = self.ack.longitud()
len_rts = self.rts.longitud()
len_cts = self.cts.longitud()
if (tipo_pkt == "DATA") and len_data>0: # There are Data packets?
self.data.elementos.reverse()
x=self.data.read(0)
phy_pkt = plcp.crear_paquete("SI",x)
self.data.pop()
self.data.elementos.reverse()
elif tipo_pkt == "ACK" and len_ack>0: # There are ACK packets?
self.ack.elementos.reverse()
x=self.ack.read(0)
phy_pkt = plcp.crear_paquete("SI",x)
self.ack.pop()
self.ack.elementos.reverse()
elif tipo_pkt == "RTS" and len_rts>0: # There are RTS packets?
self.rts.elementos.reverse()
x=self.rts.read(0)
phy_pkt = plcp.crear_paquete("SI",x)
self.rts.pop()
self.rts.elementos.reverse()
elif tipo_pkt == "CTS" and len_cts>0: # There are CTS packets?
self.cts.elementos.reverse()
x=self.cts.read(0)
phy_pkt = plcp.crear_paquete("SI",x)
self.cts.pop()
self.cts.elementos.reverse()
else: # There are not packets
phy_pkt = plcp.crear_paquete("NO",[])
plcp.enviar_a_mac(self.socket,phy_pkt) # Send the result (PHY packet) to MAC layer
self.socket.close()
# PHY packet generator script. It sends an 802.11 frame simulating its arrival from the wireless medium
if (paquete_llegada["TIPO"]=="DATA" or paquete_llegada["TIPO"]=="DATA_FRAG"):
if paquete_llegada["DATOS"]["INFO"]["mac_add1"] == self.my_mac: # Is the data packet addressed to this node?
self.data.push(paquete_llegada["DATOS"])
self.socket.close()
if (paquete_llegada["TIPO"]=="ACK"):
if paquete_llegada["DATOS"]["INFO"]["RX_add"] == self.my_mac:# Is the ACK addressed to this node?
self.ack.push(paquete_llegada["DATOS"])
self.socket.close()
if (paquete_llegada["TIPO"]=="RTS"): #It is a RTS
self.rts.push(paquete_llegada["DATOS"])
self.socket.close()
if (paquete_llegada["TIPO"]=="CTS"): #It is a CTS
self.cts.push(paquete_llegada["DATOS"])
self.socket.close()
if (paquete_llegada["TIPO"]=="BEACON"): #It is a BEACON
beacon = paquete_llegada["DATOS"]
beacon = beacon["INFO"]
msg = plcp.nuevo_beacon()
msg["MAC"]= beacon["mac_add2"]
msg["timestamp"]=beacon["timestamp"]
msg["BI"]=beacon["BI"]
msg["OFFSET"]=time.time() - beacon["timestamp"]
x = self.bcn.longitud()
actualizado = False
# Update the beacon list
for i in range(0,x):
if msg["MAC"]==self.bcn.read(i)["MAC"]:
self.bcn.quitar(i)
self.bcn.insert(i,msg)
actualizado = True
if actualizado == False:
self.bcn.insert(x+1,msg)
if (paquete_llegada["TIPO"]=="OTHER"):
#print "No packet arrived"
self.socket.close()
#DEBUG
print "=========== BUFFER STATUS ==========="
print "DATA [%i]"%self.data.longitud()
print "ACK [%i]"%self.ack.longitud()
print "RTS [%i]"%self.rts.longitud()
print "CTS [%i]"%self.cts.longitud()
print "====================================="
print "\n\n"
# Beacon list
print "========= NEIGHBOR NODES INFORMATION =========="
for i in range (0,self.bcn.longitud()):
leido = self.bcn.read(i)
print "[MAC = %s]\t [Timestamp = %s]\t [Beacon Interval = %s]\t [OFFSET = %s]" %(mac.which_dir(leido["MAC"]),leido["timestamp"],leido["BI"],leido["OFFSET"])
print "==============================================="
def RX_Client(options,my_mac,phy_rx_server):
phy_rx_client, phy_rx_addr = phy_rx_server.accept()
while 1:
#phy_rx_client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
#phy_rx_client.connect((socket.gethostname(), options.PHYRXport))
# PHY 802.11 frame arrival from the wireless medium
pkt = phy_rx_client.recv(10000)
arrived_packet=mac.parse_mac(pkt)
if (arrived_packet["HEADER"]=="DATA" or arrived_packet["HEADER"]=="DATA_FRAG"):
if arrived_packet["DATA"]["INFO"]["mac_add1"] == my_mac: # Is the data packet addressed to this node?
data.push(arrived_packet["DATA"])
else:
other.push("random data")
if (arrived_packet["HEADER"]=="ACK"):
if arrived_packet["DATA"]["INFO"]["RX_add"] == my_mac:# Is the ACK addressed to this node?
ack.push(arrived_packet["DATA"])
if (arrived_packet["HEADER"]=="RTS"): #It is a RTS
rts.push(arrived_packet["DATA"])
if (arrived_packet["HEADER"]=="CTS"): #It is a CTS
cts.push(arrived_packet["DATA"])
if (arrived_packet["HEADER"]=="BEACON"): #It is a BEACON
beacon = arrived_packet["DATA"]
beacon = beacon["INFO"]
msg = plcp.new_beacon()
msg["MAC"]= beacon["mac_add2"]
msg["timestamp"]=beacon["timestamp"]
msg["BI"]=beacon["BI"]
msg["OFFSET"]=time.time() - beacon["timestamp"]
x = bcn.length()
updated = False
# Update the beacon list
for i in range(0,x):
if msg["MAC"]==bcn.read(i)["MAC"]:
bcn.remove(i)
bcn.insert(i,msg)
updated = True
if updated == False:
bcn.insert(x+1,msg)
if (arrived_packet["HEADER"]==""):
print "No packet arrived"
#DEBUG
print "=========== BUFFER STATUS ==========="
print "DATA [%i]"%data.length()
print "ACK [%i]"%ack.length()
print "RTS [%i]"%rts.length()
print "CTS [%i]"%cts.length()
print "OTHER [%i]"%other.length()
print "====================================="
print "\n\n"
# Beacon list
print "========= NEIGHBOR NODES INFORMATION =========="
for i in range (0,bcn.length()):
item = bcn.read(i)
print "[MAC = %s]\t [Timestamp = %s]\t [Beacon Interval = %s]\t [OFFSET = %s]" %(mac.which_dir(item["MAC"]),item["timestamp"],item["BI"],item["OFFSET"])
print "==============================================="
phy_rx_client.close()
def run(self):
pkt = self.socket.recv(1000)
paquete_llegada = pickle.loads(pkt)
# MAC requests an incoming packet to the PHY
if (paquete_llegada["TIPO"] == "COLA"):
tipo_pkt = paquete_llegada["DATOS"]
len_data = self.data.longitud()
len_ack = self.ack.longitud()
len_rts = self.rts.longitud()
len_cts = self.cts.longitud()
if (tipo_pkt
== "DATA") and len_data > 0: # There are Data packets?
self.data.elementos.reverse()
x = self.data.read(0)
phy_pkt = plcp.crear_paquete("SI", x)
self.data.pop()
self.data.elementos.reverse()
elif tipo_pkt == "ACK" and len_ack > 0: # There are ACK packets?
self.ack.elementos.reverse()
x = self.ack.read(0)
phy_pkt = plcp.crear_paquete("SI", x)
self.ack.pop()
self.ack.elementos.reverse()
elif tipo_pkt == "RTS" and len_rts > 0: # There are RTS packets?
self.rts.elementos.reverse()
x = self.rts.read(0)
phy_pkt = plcp.crear_paquete("SI", x)
self.rts.pop()
self.rts.elementos.reverse()
elif tipo_pkt == "CTS" and len_cts > 0: # There are CTS packets?
self.cts.elementos.reverse()
x = self.cts.read(0)
phy_pkt = plcp.crear_paquete("SI", x)
self.cts.pop()
self.cts.elementos.reverse()
else: # There are not packets
phy_pkt = plcp.crear_paquete("NO", [])
plcp.enviar_a_mac(
self.socket,
phy_pkt) # Send the result (PHY packet) to MAC layer
self.socket.close()
# PHY packet generator script. It sends an 802.11 frame simulating its arrival from the wireless medium
if (paquete_llegada["TIPO"] == "DATA"
or paquete_llegada["TIPO"] == "DATA_FRAG"):
if paquete_llegada["DATOS"]["INFO"][
"mac_add1"] == self.my_mac: # Is the data packet addressed to this node?
self.data.push(paquete_llegada["DATOS"])
self.socket.close()
if (paquete_llegada["TIPO"] == "ACK"):
if paquete_llegada["DATOS"]["INFO"][
"RX_add"] == self.my_mac: # Is the ACK addressed to this node?
self.ack.push(paquete_llegada["DATOS"])
self.socket.close()
if (paquete_llegada["TIPO"] == "RTS"): #It is a RTS
self.rts.push(paquete_llegada["DATOS"])
self.socket.close()
if (paquete_llegada["TIPO"] == "CTS"): #It is a CTS
self.cts.push(paquete_llegada["DATOS"])
self.socket.close()
if (paquete_llegada["TIPO"] == "BEACON"): #It is a BEACON
beacon = paquete_llegada["DATOS"]
beacon = beacon["INFO"]
msg = plcp.nuevo_beacon()
msg["MAC"] = beacon["mac_add2"]
msg["timestamp"] = beacon["timestamp"]
msg["BI"] = beacon["BI"]
msg["OFFSET"] = time.time() - beacon["timestamp"]
x = self.bcn.longitud()
actualizado = False
# Update the beacon list
for i in range(0, x):
if msg["MAC"] == self.bcn.read(i)["MAC"]:
self.bcn.quitar(i)
self.bcn.insert(i, msg)
actualizado = True
if actualizado == False:
self.bcn.insert(x + 1, msg)
if (paquete_llegada["TIPO"] == "OTHER"):
#print "No packet arrived"
self.socket.close()
#DEBUG
print "=========== BUFFER STATUS ==========="
print "DATA [%i]" % self.data.longitud()
print "ACK [%i]" % self.ack.longitud()
print "RTS [%i]" % self.rts.longitud()
print "CTS [%i]" % self.cts.longitud()
print "====================================="
print "\n\n"
# Beacon list
print "========= NEIGHBOR NODES INFORMATION =========="
for i in range(0, self.bcn.longitud()):
leido = self.bcn.read(i)
print "[MAC = %s]\t [Timestamp = %s]\t [Beacon Interval = %s]\t [OFFSET = %s]" % (
mac.which_dir(leido["MAC"]), leido["timestamp"], leido["BI"],
leido["OFFSET"])
print "==============================================="
"""
Starts the MAC operation
"""
while 1:
#IDLE STATE
if State == "IDLE":
# Is a RTS?
reply_phy1, packet_phy1 = MAC.read_phy_response(PHY_port, "RTS")
#print State
if reply_phy1 == "YES":
verbose = True # Show when the MAC is IDLE
copied = packet_phy1 # Copy the received packet from the PHY
x = copied["INFO"] # Copy the 802.11 frame included in the received packet from PHY
if my_mac == x["RX_add"]:
print "[R]-[%s]-[DA: %s]-[SA: %s]-[duration: %f]-[IFM:1]" %(copied["HEADER"],MAC.which_dir(x["RX_add"]),MAC.which_dir(x["TX_add"]),x["txtime"])
dest_mac = (x["TX_add"]) # Receiver Address of the CTS frame
RTS_duration = x["txtime"] # Value of RTS' TX time
if options.V: print "| IDLE | RTS received | TRANSMITTING_CTS |"
"""
#============================================================
# /TEST/ UNCOMMENT TO CHECK RTS/CTS FUNCTIONALITY
#============================================================
# STEP 1/4: Node 1 --> RTS
values = {"duration":x["txtime"], "mac_ra":x["RX_add"], "mac_ta":x["TX_add"], "timestamp":time.time()}
RTS_forced = MAC.generate_pkt("RTS", options.interp, options.regime, values)
packet_RTS_forced = MAC.create_packet("PKT", RTS_forced)
MAC.transmit(packet_RTS_forced, PHY_port)
time.sleep(tslot)
#============================================================
"""