def main(net: switchyard.llnetbase.LLNetBase):
my_interfaces = net.interfaces()
mymacs = [intf.ethaddr for intf in my_interfaces]
switch_table = {}
while True:
try:
_, fromIface, packet = net.recv_packet()
except NoPackets:
continue
except Shutdown:
break
log_debug(f"In {net.name} received packet {packet} on {fromIface}")
eth = packet.get_header(Ethernet)
if eth is None:
log_info("Received a non-Ethernet packet?!")
return
if eth.dst in mymacs:
log_info("Received a packet intended for me")
else:
if eth.dst in switch_table:
log_info(
f"already in switch_table,send {packet} to {switch_table[eth.dst]}"
)
net.send_packet(switch_table[eth.dst], packet)
else:
for intf in my_interfaces:
if fromIface != intf.name:
log_info(f"Flooding packet {packet} to {intf.name}")
net.send_packet(intf, packet)
switch_table[eth.src] = fromIface
net.shutdown()
def main(net: switchyard.llnetbase.LLNetBase):
my_interfaces = net.interfaces()
mymacs = [intf.ethaddr for intf in my_interfaces]
switch_table = deque(maxlen=5)
#maxsize=5
while True:
try:
_, fromIface, packet = net.recv_packet()
except NoPackets:
continue
except Shutdown:
break
log_debug(f"In {net.name} received packet {packet} on {fromIface}")
eth = packet.get_header(Ethernet)
find = False
for i, [mac, entry, volume] in enumerate(switch_table):
if eth.src == mac:
find = True
if entry != fromIface:
switch_table[i] = [mac, fromIface, volume]
if find == False:
if len(switch_table) == 5:
a, b, minnum = switch_table[0]
k = 0
for i, [mac, entry, volume] in enumerate(switch_table):
if volume < minnum:
k = i
minnum = volume
log_info(f"deleting the entry :{switch_table[k]}")
switch_table.remove(switch_table[k])
switch_table.append([eth.src, fromIface, 0])
else:
switch_table.append([eth.src, fromIface, 0])
if eth is None:
log_info("Received a non-Ethernet packet?!")
return
if eth.dst in mymacs:
log_info("Received a packet intended for me")
else:
find = False
for i, [mac, entry, traffic] in enumerate(switch_table):
if mac == eth.dst:
find = True
log_info(
f"already in switch_table,send {packet} to {entry}")
net.send_packet(entry, packet)
switch_table[i] = [mac, entry, traffic + 1]
if find == False:
for intf in my_interfaces:
if fromIface != intf.name:
log_info(f"Flooding packet {packet} to {intf.name}")
net.send_packet(intf, packet)
net.shutdown()
def main(net: switchyard.llnetbase.LLNetBase):
my_interfaces = net.interfaces()
mymacs = [intf.ethaddr for intf in my_interfaces]
icnt = 0
ocnt = 0
while True:
try:
_, fromIface, packet = net.recv_packet()
except NoPackets:
continue
except Shutdown:
break
icnt += 1
log_debug(f"In {net.name} received packet {packet} on {fromIface}")
eth = packet.get_header(Ethernet)
if eth is None:
log_info("Received a non-Ethernet packet?!")
return
if eth.dst in mymacs:
log_info("Received a packet intended for me")
else:
ocnt += 1
for intf in my_interfaces:
if fromIface != intf.name:
log_info(f"Flooding packet {packet} to {intf.name}")
net.send_packet(intf, packet)
log_info(f"in:{icnt} out:{ocnt}")
net.shutdown()