#include <u.h>#include <ctype.h> /* *  return ndb attribute type of an ip name */char*ipattr(char *name){	char *p, c;	int dot = 0;	int alpha = 0;	int colon = 0;	int hex = 0; 	for(p = name; *p; p++){		c = *p;		if(isdigit(c))			continue;		if(isxdigit(c))			hex = 1;		else if(isalpha(c) || c == '-')			alpha = 1;		else if(c == '.')			dot = 1;		else if(c == ':')			colon = 1;		else			return "sys";	} 	if(alpha){		if(dot)			return "dom";		else			return "sys";	} 	if(colon)		return "ip";	/* ip v6 */ 	if(dot && !hex)		return "ip";	else		return "sys";}