1#include <resolv.h>
 2
 3int dn_skipname(const unsigned char *s, const unsigned char *end)
 4{
 5	const unsigned char *p = s;
 6	while (p < end)
 7		if (!*p) return p-s+1;
 8		else if (*p>=192)
 9			if (p+1<end) return p-s+2;
10			else break;
11		else
12			if (end-p<*p+1) break;
13			else p += *p + 1;
14	return -1;
15}