mirror of https://github.com/vacp2p/research.git
46 lines
1.6 KiB
Python
46 lines
1.6 KiB
Python
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import random
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# NOTE: Inspired by github.com/ethereum/research networksim.py.
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class NetworkSimulator():
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def __init__(self):
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self.nodes = []
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self.time = 0
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self.queue = {}
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self.peers = {}
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# Global network reliability
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self.reliability = 1 # 0.95? Dunno.
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def tick(self):
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if self.time in self.queue:
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# XXX: Should sender be here?
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for sender, receiver, msg in self.queue[self.time]:
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if random.random() < self.reliability:
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#print "*** message ok", sender.name, "->", receiver.name
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receiver.on_receive(sender, msg)
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#else:
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#print "*** message dropped", sender.name, "->", receiver.name
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#print ""
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print "tick", self.time + 1
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#print "-----------"
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for n in self.nodes:
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n.tick()
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self.time += 1
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# XXX: This should be normal distribution or Poisson
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def latency_uniform_random(self):
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# XXX: Hardcode for now, easier analyze
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latency = 1
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#latency = random.randint(1,3)
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return latency
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# NOTE: Direct message, no broadcast etc
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def send_message(self, sender_id, receiver_id, message):
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#print "*** (network) send_message", sender_id, receiver_id
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# XXX: Assuming sender exists
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sender = self.peers[sender_id]
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receiver = self.peers[receiver_id]
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recv_time = self.time + self.latency_uniform_random()
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if recv_time not in self.queue:
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self.queue[recv_time] = []
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self.queue[recv_time].append((sender, receiver, message))
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