a0287caaa3
DNS PTR record generation. subcalc takes command line arguments in a similar format to ifconfig(8) so the synopsis should be familiar to the user. Given an address family, address and a netmask/prefix length, subcalc will calculate the number of hosts and address ranges of the specific network. PR: ports/55979 Submitted by: Chris S.J. Peron
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bin/subcalc
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