1 #ifndef IP4_H 2 #define IP4_H 3 4 extern unsigned int ip4_scan(char *,char *); 5 extern unsigned int ip4_fmt(char *,char *); 6 7 #define IP4_FMT 20 8 9 extern const char ip4loopback[4]; /* = {127,0,0,1}; */ 10 11 #endif 12