dns_sortip.c

   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 }