unsigned ctl_net_is_local_ip_address(CTL_NET_IPv4_ADDR_t addr);
ctl_net_is_local_ip_address determines whether addr is an IP address on the local subnet. ctl_net_is_local_ip_address returns non-zero if addr is known to be on the local subnet and zero if not.
ctl_net_is_local_ip_address is thread-safe.