Canonicalize CIDR: Difference between revisions
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function canonCIDR(cidr::String) |
function canonCIDR(cidr::String) |
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cidr = replace(cidr, r"\.(\.|\/)" => s".0\1") # handle .. |
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cidr = replace(cidr, r"\.(\.|\/)" => s".0\1") # handle ... |
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ip = split(cidr, "/") |
ip = split(cidr, "/") |
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dig = length(ip) > 1 ? 2^(32 - parse( |
dig = length(ip) > 1 ? 2^(32 - parse(UInt8, ip[2])) : 1 |
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ip4 = IPv4(UInt64(IPv4(ip[1])) & (0xffffffff - dig + 1)) |
ip4 = IPv4(UInt64(IPv4(ip[1])) & (0xffffffff - dig + 1)) |
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return length(ip) == 1 ? "$ip4" : "$ip4/$(ip[2])" |
return length(ip) == 1 ? "$ip4" : "$ip4/$(ip[2])" |
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println(canonCIDR("87.70.141.1/22")) |
println(canonCIDR("87.70.141.1/22")) |
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println(canonCIDR("100.68.0.18/18")) |
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println(canonCIDR("10.4.30.77/30")) |
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println(canonCIDR("110.200.21/4")) |
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println(canonCIDR("10..55/8")) |
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println(canonCIDR("10.../8")) |
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</lang>{{out}} |
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<pre> |
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using Sockets |
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function canonCIDR(cidr::String) |
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cidr = replace(cidr, r"\.(\.|\/)" => s".0\1") # handle .. |
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cidr = replace(cidr, r"\.(\.|\/)" => s".0\1") # handle ... |
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ip = split(cidr, "/") |
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dig = length(ip) > 1 ? 2^(32 - parse(UInt8, ip[2])) : 1 |
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ip4 = IPv4(UInt64(IPv4(ip[1])) & (0xffffffff - dig + 1)) |
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return length(ip) == 1 ? "$ip4" : "$ip4/$(ip[2])" |
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end |
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println(canonCIDR("87.70.141.1/22")) |
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println(canonCIDR("100.68.0.18/18")) |
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println(canonCIDR("10.4.30.77/30")) |
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println(canonCIDR("110.200.21/4")) |
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println(canonCIDR("10..55/8")) |
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println(canonCIDR("10.../8")) |
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</lang>{{out}} |
</lang>{{out}} |
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<pre> |
<pre> |
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87.70.140.0/22 |
87.70.140.0/22 |
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100.68.0.0/18 |
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10.4.30.76/30 |
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96.0.0.0/4 |
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10.0.0.0/8 |
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10.0.0.0/8 |
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</pre> |
</pre> |
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