#define CTL_CMD 0
#define CTL_EXEC 1
#define CTL_ALIAS 2
#define CTL_DNS 3
/* NOTE: DNS_ADDR_MAX addresses, starting from CTL_DNS, are reserved */
#define CTL_IS_DNS(x) ((unsigned)((x)-CTL_DNS) < (unsigned)dns_addr_count)
#define CTL_SPECIAL "10.0.2.0"
#define CTL_LOCAL "10.0.2.15"