slirp/ctl.h - platform/external/qemu - Git at Google

 #define CTL_CMD		0
 #define CTL_EXEC	1
 #define CTL_ALIAS	2
 #define CTL_DNS		3

 #define CTL_SPECIAL	"10.0.2.0"
 #define CTL_LOCAL	"10.0.2.15"
	#define CTL_CMD 0
	#define CTL_EXEC 1
	#define CTL_ALIAS 2
	#define CTL_DNS 3

	#define CTL_SPECIAL "10.0.2.0"
	#define CTL_LOCAL "10.0.2.15"