jehanne/sys/src/lib/ndb/ipattr.c

56 lines
998 B
C

/*
* This file is part of the UCB release of Plan 9. It is subject to the license
* terms in the LICENSE file found in the top-level directory of this
* distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No
* part of the UCB release of Plan 9, including this file, may be copied,
* modified, propagated, or distributed except according to the terms contained
* in the LICENSE file.
*/
#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";
}