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try continuous port range

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Christian Ulrich 2020-11-18 18:22:47 +01:00
parent 769621f4b9
commit 490d34bd79
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GPG Key ID: 8241BE099775A097
1 changed files with 6 additions and 9 deletions
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15
port_prediction.nim
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@ -84,16 +84,13 @@ proc predictPortRange*(localPort: Port, probedPorts: seq[Port]): seq[Port] =
return return
# assume symmetric NAT with random port mapping # assume symmetric NAT with random port mapping
randomize() randomize()
let first = if minPort >= 1024 + 10000: let first = if maxPort <= uint16.high - RandomPortCount - 1000'u16:
minPort - 10000 maxPort + 1000'u16
else: else:
1024 uint16.high - RandomPortCount
let last = if maxPort <= uint16.high - 10000: result = newSeq[Port](RandomPortCount)
maxPort + 10000 for i in 0'u16 .. RandomPortCount - 1'u16:
else: result[i] = Port(first + i)
uint16.high
for _ in 1 .. RandomPortCount:
result.add(Port(rand(first .. last)))
suite "port prediction tests": suite "port prediction tests":
test "single port": test "single port":