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Sourcery Starbot ⭐ refactored ancker010/exabgp-flowspec-generator #1

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Sourcery Starbot ⭐ refactored ancker010/exabgp-flowspec-generator #1

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30 changes: 17 additions & 13 deletions flowspec-generator.py
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Original file line number Diff line number Diff line change
Expand Up @@ -14,25 +14,26 @@

# Function to generate a random IPv4 address within the given prefix.
def genipv4():
subnet = IPv4Network("192.168.0.0/16")
subnet = IPv4Network("192.168.0.0/16")
bits = getrandbits(subnet.max_prefixlen - subnet.prefixlen)
addr = IPv4Address(subnet.network_address + bits)
addr_str = str(addr)
return addr_str
return str(addr)
Comment on lines -17 to +20
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Function genipv4 refactored with the following changes:

  • Inline variable that is only used once


def genipv6():
subnet6 = IPv6Network("2001:DB8:beef::/64")
bits6 = getrandbits(subnet6.max_prefixlen - subnet6.prefixlen)
addr6 = IPv6Address(subnet6.network_address + bits6)
addr_str6 = str(addr6)
return addr_str6
return str(addr6)
Comment on lines -27 to +26
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Function genipv6 refactored with the following changes:

  • Inline variable that is only used once



# Function to generate a list of flowspec rules based on random data.
def genflows():
flow_types = []
flow_types.append(
"announce flow route { match { source " + genipv4() + "/32; destination 192.168.255.10/32; destination-port =" + str(random.randint(1024, 65530)) + "; protocol tcp; } then { rate-limit " + str(random.randint(9600, 51200)) + "; } }")
flow_types = [
"announce flow route { match { source " + genipv4() +
"/32; destination 192.168.255.10/32; destination-port =" + str(
random.randint(1024, 65530)) + "; protocol tcp; } then { rate-limit " +
str(random.randint(9600, 51200)) + "; } }"
]
Comment on lines -33 to +36
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Function genflows refactored with the following changes:

  • Merge append into list assignment

flow_types.append("announce flow route { match { source " + genipv4() + "/32; } then { discard; } }")
flow_types.append("announce flow route { match { source " + genipv4() + "/32; } then { redirect 666:666; } }")
flow_types.append("announce flow route { match { destination " + genipv4() + "/32; } then { discard; } }")
Expand All @@ -45,9 +46,12 @@ def genflows():
return flow_types

def genflows6():
flow_types6 = []
flow_types6.append(
"announce flow route { match { source " + genipv6() + "/128; destination 2001:DB8:beef:cafe::1/128; destination-port =" + str(random.randint(1024, 65530)) + "; protocol tcp; } then { rate-limit " + str(random.randint(9600, 51200)) + "; } }")
flow_types6 = [
"announce flow route { match { source " + genipv6() +
"/128; destination 2001:DB8:beef:cafe::1/128; destination-port =" + str(
random.randint(1024, 65530)) + "; protocol tcp; } then { rate-limit " +
str(random.randint(9600, 51200)) + "; } }"
]
Comment on lines -48 to +54
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Function genflows6 refactored with the following changes:

  • Merge append into list assignment

flow_types6.append("announce flow route { match { source " + genipv6() + "/128; } then { discard; } }")
flow_types6.append("announce flow route { match { source " + genipv6() + "/128; } then { redirect 666:666; } }")
flow_types6.append("announce flow route { match { destination " + genipv6() + "/128; } then { discard; } }")
Expand All @@ -63,11 +67,11 @@ def genflows6():

# Append a randomly chosen item from the flow_types list to the messages list to be sent to exabgp.
# This is probably overly complicated, but it does what I want it to do.
for x in range(0, count):
for _ in range(count):
flows = genflows()
messages.append(random.choice(flows))

for x in range(0, count):
for x in range(count):
Comment on lines -66 to +74
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Lines 66-70 refactored with the following changes:

  • Replace range(0, x) with range(x)
  • Replace unused for index with underscore

flows6 = genflows6()
messages.append(random.choice(flows6))

Expand Down