Created
February 22, 2011 22:55
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CIDR in/out net calculation
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| -module(netmask). | |
| -export([in_network/3]). | |
| in_network(Net, CIDR, IP) | |
| when is_binary(Net), is_binary(IP), is_integer(CIDR) -> | |
| <<NetworkPrefix:CIDR/bits, _/bits>> = Net, | |
| case IP of | |
| <<NetworkPrefix:CIDR/bits, _Host/bits>> -> | |
| in_net; | |
| _ -> not_in_net | |
| end. |
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