source/libcli/resolve/bcast.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    broadcast name resolution module
   5
   6    Copyright (C) Andrew Tridgell 2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "libcli/resolve/resolve.h"
  24 #include "system/network.h"
  25 #include "lib/socket/netif.h"
  26 #include "param/param.h"
  27
  28 /**
  29   broadcast name resolution method - async send
  30  */
  31 struct composite_context *resolve_name_bcast_send(TALLOC_CTX *mem_ctx,
  32                                                   struct event_context *event_ctx,
  33                                                   struct nbt_name *name)
  34 {
  35         int num_interfaces = iface_count(global_loadparm);
  36         const char **address_list;
  37         struct composite_context *c;
  38         int i, count=0;
  39
  40         address_list = talloc_array(mem_ctx, const char *, num_interfaces+1);
  41         if (address_list == NULL) return NULL;
  42
  43         for (i=0;i<num_interfaces;i++) {
  44                 const char *bcast = iface_n_bcast(global_loadparm, i);
  45                 if (bcast == NULL) continue;
  46                 address_list[count] = talloc_strdup(address_list, bcast);
  47                 if (address_list[count] == NULL) {
  48                         talloc_free(address_list);
  49                         return NULL;
  50                 }
  51                 count++;
  52         }
  53         address_list[count] = NULL;
  54
  55         c = resolve_name_nbtlist_send(mem_ctx, event_ctx, name, address_list, true, false);
  56         talloc_free(address_list);
  57
  58         return c;
  59 }
  60
  61 /*
  62   broadcast name resolution method - recv side
  63  */
  64 NTSTATUS resolve_name_bcast_recv(struct composite_context *c,
  65                                  TALLOC_CTX *mem_ctx, const char **reply_addr)
  66 {
  67         return resolve_name_nbtlist_recv(c, mem_ctx, reply_addr);
  68 }
  69
  70 /*
  71   broadcast name resolution method - sync call
  72  */
  73 NTSTATUS resolve_name_bcast(struct nbt_name *name,
  74                             TALLOC_CTX *mem_ctx,
  75                             const char **reply_addr)
  76 {
  77         struct composite_context *c = resolve_name_bcast_send(mem_ctx, NULL, name);
  78         return resolve_name_bcast_recv(c, mem_ctx, reply_addr);
  79 }
  80