ipsec_networkof(3) on Linux
The text 772e9fcb6373, as Debian 3.1 (Sarge) shipped it.
initialize an ip_subnet ipsec addrtosubnet - initialize a singleton ip_subnet ipsec subnettypeof - get address type of an ip_subnet ipsec masktocount - convert subnet mask to bit count ipsec networkof - get base address of an ip_subnet ipsec maskof - get subnet mask of an ip_subnet