[hcoop/zz_old/debian/djbdns.git] / dns_sortip.c

#include "byte.h"
#include "dns.h"

/* XXX: sort servers by configurable notion of closeness? */
/* XXX: pay attention to competence of each server? */

void dns_sortip(char *s,unsigned int n)
{
  unsigned int i;
  char tmp[4];

  n >>= 2;
  while (n > 1) {
    i = dns_random(n);
    --n;
    byte_copy(tmp,4,s + (i << 2));
    byte_copy(s + (i << 2),4,s + (n << 2));
    byte_copy(s + (n << 2),4,tmp);
  }
}
Commit	Line	Data
dc0d77d7 CE	1	#include "byte.h"
	2	#include "dns.h"
	3
	4	/* XXX: sort servers by configurable notion of closeness? */
	5	/* XXX: pay attention to competence of each server? */
	6
	7	void dns_sortip(char *s,unsigned int n)
	8	{
	9	unsigned int i;
	10	char tmp[4];
	11
	12	n >>= 2;
	13	while (n > 1) {
	14	i = dns_random(n);
	15	--n;
	16	byte_copy(tmp,4,s + (i << 2));
	17	byte_copy(s + (i << 2),4,s + (n << 2));
	18	byte_copy(s + (n << 2),4,tmp);
	19	}
	20	}