unsigned ctl_net_is_subnet_broadcast_address(CTL_NET_IPv4_ADDR_t addr);
ctl_net_is_subnet_broadcast_address determines whether addr is an IP subnet broadcast address; the limited broadcast address 255.255.255.255 is not considered a subnet broadcast address by ctl_net_is_subnet_broadcast_address; if you need to know whether an IP address is a local subnet broadcast address or a limited broadcast address, use ctl_net_is_local_broadcast_address.
ctl_net_is_subnet_broadcast_address is thread-safe.