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 "lib/util/util_file.h"
  24 #include "libcli/dgram/libdgram.h"
  25 #include "lib/socket/socket.h"
  26 #include "libcli/resolve/resolve.h"
  27 #include "librpc/gen_ndr/ndr_nbt.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                                       const char *mailslot,
  36                                       struct nbt_name *src_name,
  37                                       struct nbt_netlogon_packet *request)
  38 {
  39         NTSTATUS status;
  40         enum ndr_err_code ndr_err;
  41         DATA_BLOB blob;
  42         TALLOC_CTX *tmp_ctx = talloc_new(dgmsock);
  43
  44         ndr_err = ndr_push_struct_blob(&blob, tmp_ctx, request,
  45                                       (ndr_push_flags_fn_t)ndr_push_nbt_netlogon_packet);
  46         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
  47                 talloc_free(tmp_ctx);
  48                 return ndr_map_error2ntstatus(ndr_err);
  49         }
  50
  51
  52         status = dgram_mailslot_send(dgmsock, DGRAM_DIRECT_UNIQUE,
  53                                      mailslot,
  54                                      dest_name, dest,
  55                                      src_name, &blob);
  56         talloc_free(tmp_ctx);
  57         return status;
  58 }
  59
  60
  61 /*
  62    send a netlogon mailslot reply
  63 */
  64 NTSTATUS dgram_mailslot_netlogon_reply(struct nbt_dgram_socket *dgmsock,
  65                                        struct nbt_dgram_packet *request,
  66                                        const char *my_netbios_name,
  67                                        const char *mailslot_name,
  68                                        struct nbt_netlogon_response *reply)
  69 {
  70         NTSTATUS status;
  71         DATA_BLOB blob;
  72         TALLOC_CTX *tmp_ctx = talloc_new(dgmsock);
  73         struct nbt_name myname;
  74         struct socket_address *dest;
  75
  76         status = push_nbt_netlogon_response(&blob, tmp_ctx, reply);
  77         if (!NT_STATUS_IS_OK(status)) {
  78                 return status;
  79         }
  80
  81         make_nbt_name_client(&myname, my_netbios_name);
  82
  83         dest = socket_address_from_strings(tmp_ctx, dgmsock->sock->backend_name,
  84                                            request->src_addr, request->src_port);
  85         if (!dest) {
  86                 talloc_free(tmp_ctx);
  87                 return NT_STATUS_NO_MEMORY;
  88         }
  89
  90         status = dgram_mailslot_send(dgmsock, DGRAM_DIRECT_UNIQUE,
  91                                      mailslot_name,
  92                                      &request->data.msg.source_name,
  93                                      dest,
  94                                      &myname, &blob);
  95         talloc_free(tmp_ctx);
  96         return status;
  97 }
  98
  99
 100 /*
 101   parse a netlogon request. The packet must be a valid mailslot packet
 102 */
 103 NTSTATUS dgram_mailslot_netlogon_parse_request(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         enum ndr_err_code ndr_err;
 109
 110         ndr_err = ndr_pull_struct_blob(&data, mem_ctx, netlogon,
 111            (ndr_pull_flags_fn_t)ndr_pull_nbt_netlogon_packet);
 112         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 113                 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
 114                 DEBUG(0,("Failed to parse netlogon packet of length %d: %s\n",
 115                          (int)data.length, nt_errstr(status)));
 116                 if (DEBUGLVL(10)) {
 117                         (void)file_save("netlogon.dat", data.data, data.length);
 118                 }
 119                 return status;
 120         }
 121         return NT_STATUS_OK;
 122 }
 123
 124 /*
 125   parse a netlogon response. The packet must be a valid mailslot packet
 126 */
 127 NTSTATUS dgram_mailslot_netlogon_parse_response(TALLOC_CTX *mem_ctx,
 128                                                 struct nbt_dgram_packet *dgram,
 129                                                 struct nbt_netlogon_response *netlogon)
 130 {
 131         NTSTATUS status;
 132         DATA_BLOB data = dgram_mailslot_data(dgram);
 133
 134         status = pull_nbt_netlogon_response(&data, mem_ctx, netlogon);
 135         if (!NT_STATUS_IS_OK(status)) {
 136                 return status;
 137         }
 138
 139         return NT_STATUS_OK;
 140 }
 141