net/djbdns/patches/090-tinydns-one-second.patch

   1 --- a/tdlookup.c
   2 +++ b/tdlookup.c
   3 @@ -280,15 +280,24 @@ static int doit(char *q,char qtype[2])
   4
   5  int respond(char *q,char qtype[2],char ip[4])
   6  {
   7 -  int fd;
   8 +  static struct tai cdb_valid = { 0 };
   9 +  static int fd = -1;
  10 +  struct tai one_second;
  11    int r;
  12    char key[6];
  13
  14    tai_now(&now);
  15 -  fd = open_read("data.cdb");
  16 -  if (fd == -1) return 0;
  17 -  cdb_init(&c,fd);
  18 -
  19 +  if (tai_less(&cdb_valid, &now)) {
  20 +    if (fd != -1) {
  21 +      cdb_free(&c);
  22 +      close(fd);
  23 +    }
  24 +    fd = open_read("data.cdb");
  25 +    if (fd == -1) return 0;
  26 +    cdb_init(&c,fd);
  27 +    tai_uint(&one_second, 1);
  28 +    tai_add(&cdb_valid, &now, &one_second);
  29 +  }
  30    byte_zero(clientloc,2);
  31    key[0] = 0;
  32    key[1] = '%';
  33 @@ -312,7 +321,5 @@ int respond(char *q,char qtype[2],char i
  34
  35    r = doit(q,qtype);
  36
  37 -  cdb_free(&c);
  38 -  close(fd);
  39    return r;
  40  }