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79 lines
2.0 KiB
79 lines
2.0 KiB
from queue import Empty, SimpleQueue
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from threading import Thread
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import time
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from intcode import Intcode
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def main():
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codes = Intcode.parse_file("day23.txt")
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network = Network(50, codes)
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# Part 1
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for nic in network.nics:
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thread = Thread(target=lambda: nic.run(), name=f"NIC {nic.address}")
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thread.start()
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# Part 2
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last_nat_y = None
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while True:
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time.sleep(0.1)
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for nic in network.nics:
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if not nic.inq.empty:
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break
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else:
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if not network.last_nat_packet:
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continue
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x, y = network.last_nat_packet
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if y == last_nat_y:
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exit(f"Sending another {y} from NAT.")
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last_nat_y = y
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print(f"Network is idle, sending NAT packet to 0.")
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network.nics[0].inq.put(x)
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network.nics[0].inq.put(y)
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class Network:
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def __init__(self, size, codes):
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self.nics = [NIC(address, self, codes) for address in range(size)]
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self.last_nat_packet = None
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def route(self, sender, dest, x, y):
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if dest == 255:
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print(f"NAT: {x, y}.")
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self.last_nat_packet = (x, y)
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return
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print(f"Send {x, y} from {sender} to {dest}")
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self.nics[dest].inq.put(x)
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self.nics[dest].inq.put(y)
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class NIC(Intcode):
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def __init__(self, address, network, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.address = address
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self.network = network
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self.inq = SimpleQueue()
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self.inq.put(address)
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self.outq = []
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def input_data(self):
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try:
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data = self.inq.get(timeout=0.1)
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except Empty:
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data = -1
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return data
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def output_data(self, data):
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self.outq.append(data)
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if len(self.outq) == 3:
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self.network.route(self.address, *self.outq)
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self.outq = []
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return
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if __name__ == "__main__":
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main()
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