1 #include <u.h> 2 #include <ctype.h> 3 4 /* 5 * return ndb attribute type of an ip name 6 */ 7 char* ipattr(char * name)8ipattr(char *name) 9 { 10 char *p, c; 11 int dot = 0; 12 int alpha = 0; 13 int colon = 0; 14 int hex = 0; 15 16 for(p = name; *p; p++){ 17 c = *p; 18 if(isdigit(c)) 19 continue; 20 if(isxdigit(c)) 21 hex = 1; 22 else if(isalpha(c) || c == '-') 23 alpha = 1; 24 else if(c == '.') 25 dot = 1; 26 else if(c == ':') 27 colon = 1; 28 else 29 return "sys"; 30 } 31 32 if(alpha){ 33 if(dot) 34 return "dom"; 35 else 36 return "sys"; 37 } 38 39 if(colon) 40 return "ip"; /* ip v6 */ 41 42 if(dot && !hex) 43 return "ip"; 44 else 45 return "sys"; 46 } 47