source4/libcli/dgram/netlogon.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    handling for netlogon dgram requests
   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/dgram/libdgram.h"
  24 #include "lib/socket/socket.h"
  25 #include "libcli/resolve/resolve.h"
  26 #include "librpc/gen_ndr/ndr_nbt.h"
  27 #include "param/param.h"
  28
  29 /*
  30    send a netlogon mailslot request
  31 */
  32 NTSTATUS dgram_mailslot_netlogon_send(struct nbt_dgram_socket *dgmsock,
  33                                       struct nbt_name *dest_name,
  34                                       struct socket_address *dest,
  35                                       struct nbt_name *src_name,
  36                                       struct nbt_netlogon_packet *request)
  37 {
  38         NTSTATUS status;
  39         DATA_BLOB blob;
  40         TALLOC_CTX *tmp_ctx = talloc_new(dgmsock);
  41
  42         status = ndr_push_struct_blob(&blob, tmp_ctx, request,
  43                                       (ndr_push_flags_fn_t)ndr_push_nbt_netlogon_packet);
  44         if (!NT_STATUS_IS_OK(status)) {
  45                 talloc_free(tmp_ctx);
  46                 return status;
  47         }
  48
  49
  50         status = dgram_mailslot_send(dgmsock, DGRAM_DIRECT_UNIQUE,
  51                                      NBT_MAILSLOT_NETLOGON,
  52                                      dest_name, dest,
  53                                      src_name, &blob);
  54         talloc_free(tmp_ctx);
  55         return status;
  56 }
  57
  58
  59 /*
  60    send a netlogon mailslot reply
  61 */
  62 NTSTATUS dgram_mailslot_netlogon_reply(struct nbt_dgram_socket *dgmsock,
  63                                        struct nbt_dgram_packet *request,
  64                                        const char *mailslot_name,
  65                                        struct nbt_netlogon_packet *reply)
  66 {
  67         NTSTATUS status;
  68         DATA_BLOB blob;
  69         TALLOC_CTX *tmp_ctx = talloc_new(dgmsock);
  70         struct nbt_name myname;
  71         struct socket_address *dest;
  72
  73         status = ndr_push_struct_blob(&blob, tmp_ctx, reply,
  74                                       (ndr_push_flags_fn_t)ndr_push_nbt_netlogon_packet);
  75         if (!NT_STATUS_IS_OK(status)) {
  76                 talloc_free(tmp_ctx);
  77                 return status;
  78         }
  79
  80         make_nbt_name_client(&myname, lp_netbios_name());
  81
  82         dest = socket_address_from_strings(tmp_ctx, dgmsock->sock->backend_name,
  83                                            request->src_addr, request->src_port);
  84         if (!dest) {
  85                 talloc_free(tmp_ctx);
  86                 return NT_STATUS_NO_MEMORY;
  87         }
  88
  89         status = dgram_mailslot_send(dgmsock, DGRAM_DIRECT_UNIQUE,
  90                                      mailslot_name,
  91                                      &request->data.msg.source_name,
  92                                      dest,
  93                                      &myname, &blob);
  94         talloc_free(tmp_ctx);
  95         return status;
  96 }
  97
  98
  99 /*
 100   parse a netlogon response. The packet must be a valid mailslot packet
 101 */
 102 NTSTATUS dgram_mailslot_netlogon_parse(struct dgram_mailslot_handler *dgmslot,
 103                                        TALLOC_CTX *mem_ctx,
 104                                        struct nbt_dgram_packet *dgram,
 105                                        struct nbt_netlogon_packet *netlogon)
 106 {
 107         DATA_BLOB data = dgram_mailslot_data(dgram);
 108         NTSTATUS status;
 109
 110         status = ndr_pull_struct_blob(&data, mem_ctx, netlogon,
 111                                       (ndr_pull_flags_fn_t)ndr_pull_nbt_netlogon_packet);
 112         if (!NT_STATUS_IS_OK(status)) {
 113                 DEBUG(0,("Failed to parse netlogon packet of length %d\n",
 114                          (int)data.length));
 115                 if (DEBUGLVL(10)) {
 116                         file_save("netlogon.dat", data.data, data.length);
 117                 }
 118         }
 119         return status;
 120 }