dns_resolve.c

   1 #include "iopause.h"
   2 #include "taia.h"
   3 #include "byte.h"
   4 #include "dns.h"
   5
   6 struct dns_transmit dns_resolve_tx = {0};
   7
   8 int dns_resolve(const char *q,const char qtype[2])
   9 {
  10   struct taia stamp;
  11   struct taia deadline;
  12   char servers[64];
  13   iopause_fd x[1];
  14   int r;
  15
  16   if (dns_resolvconfip(servers) == -1) return -1;
  17   if (dns_transmit_start(&dns_resolve_tx,servers,1,q,qtype,"\0\0\0\0") == -1) return -1;
  18
  19   for (;;) {
  20     taia_now(&stamp);
  21     taia_uint(&deadline,120);
  22     taia_add(&deadline,&deadline,&stamp);
  23     dns_transmit_io(&dns_resolve_tx,x,&deadline);
  24     iopause(x,1,&deadline,&stamp);
  25     r = dns_transmit_get(&dns_resolve_tx,x,&stamp);
  26     if (r == -1) return -1;
  27     if (r == 1) return 0;
  28   }
  29 }