gpxe/src/arch/i386/interface/syslinux/comboot_resolv.c

   1 #include <errno.h>
   2 #include <comboot.h>
   3 #include <gpxe/in.h>
   4 #include <gpxe/list.h>
   5 #include <gpxe/process.h>
   6 #include <gpxe/resolv.h>
   7
   8 FILE_LICENCE ( GPL2_OR_LATER );
   9
  10 static int comboot_resolv_rc;
  11 static struct in_addr comboot_resolv_addr;
  12
  13 static void comboot_resolv_done ( struct resolv_interface *resolv,
  14                                   struct sockaddr *sa, int rc ) {
  15         struct sockaddr_in *sin;
  16
  17         resolv_unplug ( resolv );
  18
  19         if ( rc != 0 ) {
  20                 comboot_resolv_rc = rc;
  21                 return;
  22         }
  23
  24         if ( sa->sa_family != AF_INET ) {
  25                 comboot_resolv_rc = -EAFNOSUPPORT;
  26                 return;
  27         }
  28
  29         sin = ( ( struct sockaddr_in * ) sa );
  30         comboot_resolv_addr = sin->sin_addr;
  31
  32         comboot_resolv_rc = 0;
  33 }
  34
  35 static struct resolv_interface_operations comboot_resolv_ops = {
  36         .done = comboot_resolv_done,
  37 };
  38
  39 static struct resolv_interface comboot_resolver = {
  40         .intf = {
  41                 .dest = &null_resolv.intf,
  42                 .refcnt = NULL,
  43         },
  44         .op = &comboot_resolv_ops,
  45 };
  46
  47 int comboot_resolv ( const char *name, struct in_addr *address ) {
  48         int rc;
  49
  50         comboot_resolv_rc = -EINPROGRESS;
  51
  52         if ( ( rc = resolv ( &comboot_resolver, name, NULL ) ) != 0 )
  53                 return rc;
  54
  55         while ( comboot_resolv_rc == -EINPROGRESS )
  56                 step();
  57
  58         *address = comboot_resolv_addr;
  59         return comboot_resolv_rc;
  60 }