source/winbind/wb_dom_info_trusted.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Get a struct wb_dom_info for a trusted domain, relying on "our" DC.
   5
   6    Copyright (C) Volker Lendecke 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 2 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, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24 #include "libcli/composite/composite.h"
  25 #include "libcli/smb_composite/smb_composite.h"
  26 #include "winbind/wb_async_helpers.h"
  27 #include "winbind/wb_server.h"
  28 #include "smbd/service_stream.h"
  29 #include "smbd/service_task.h"
  30 #include "librpc/gen_ndr/nbt.h"
  31 #include "librpc/gen_ndr/ndr_netlogon.h"
  32
  33 struct trusted_dom_info_state {
  34         struct composite_context *ctx;
  35         struct wbsrv_service *service;
  36         struct wbsrv_domain *my_domain;
  37
  38         struct netr_DsRGetDCName d;
  39         struct netr_GetAnyDCName g;
  40
  41         struct wb_dom_info *info;
  42 };
  43
  44 static void trusted_dom_info_recv_domain(struct composite_context *ctx);
  45 static void trusted_dom_info_recv_dsr(struct rpc_request *req);
  46 static void trusted_dom_info_recv_dcname(struct rpc_request *req);
  47 static void trusted_dom_info_recv_dcaddr(struct composite_context *ctx);
  48
  49 struct composite_context *wb_trusted_dom_info_send(TALLOC_CTX *mem_ctx,
  50                                                    struct wbsrv_service *service,
  51                                                    const char *domain_name,
  52                                                    const struct dom_sid *sid)
  53 {
  54         struct composite_context *result, *ctx;
  55         struct trusted_dom_info_state *state;
  56
  57         result = talloc(mem_ctx, struct composite_context);
  58         if (result == NULL) goto failed;
  59         result->state = COMPOSITE_STATE_IN_PROGRESS;
  60         result->async.fn = NULL;
  61         result->event_ctx = service->task->event_ctx;
  62
  63         state = talloc(result, struct trusted_dom_info_state);
  64         if (state == NULL) goto failed;
  65         state->ctx = result;
  66         result->private_data = state;
  67
  68         state->info = talloc_zero(state, struct wb_dom_info);
  69         if (state->info == NULL) goto failed;
  70
  71         state->service = service;
  72
  73         state->info->sid = dom_sid_dup(state->info, sid);
  74         if (state->info->sid == NULL) goto failed;
  75
  76         state->info->name = talloc_strdup(state->info, domain_name);
  77         if (state->info->name == NULL) goto failed;
  78
  79         ctx = wb_sid2domain_send(state, service, service->primary_sid);
  80         if (ctx == NULL) goto failed;
  81
  82         ctx->async.fn = trusted_dom_info_recv_domain;
  83         ctx->async.private_data = state;
  84         return result;
  85
  86  failed:
  87         talloc_free(result);
  88         return NULL;
  89 }
  90
  91 static void trusted_dom_info_recv_domain(struct composite_context *ctx)
  92 {
  93         struct trusted_dom_info_state *state =
  94                 talloc_get_type(ctx->async.private_data,
  95                                 struct trusted_dom_info_state);
  96         struct rpc_request *req;
  97
  98         state->ctx->status = wb_sid2domain_recv(ctx, &state->my_domain);
  99         if (!composite_is_ok(state->ctx)) return;
 100
 101         state->d.in.server_unc =
 102                 talloc_asprintf(state, "\\\\%s",
 103                                 state->my_domain->info->dc_name);
 104         if (composite_nomem(state->d.in.server_unc,
 105                             state->ctx)) return;
 106
 107         state->d.in.domain_name = state->info->name;
 108         state->d.in.domain_guid = NULL;
 109         state->d.in.site_guid = NULL;
 110         state->d.in.flags = 0x40000000;
 111
 112         req = dcerpc_netr_DsRGetDCName_send(state->my_domain->netlogon_pipe,
 113                                             state, &state->d);
 114         composite_continue_rpc(state->ctx, req, trusted_dom_info_recv_dsr,
 115                                state);
 116 }
 117
 118 /*
 119  * dcerpc_netr_DsRGetDCName has replied
 120  */
 121
 122 static void trusted_dom_info_recv_dsr(struct rpc_request *req)
 123 {
 124         struct trusted_dom_info_state *state =
 125                 talloc_get_type(req->async.private,
 126                                 struct trusted_dom_info_state);
 127
 128         state->ctx->status = dcerpc_ndr_request_recv(req);
 129         if (!NT_STATUS_IS_OK(state->ctx->status)) {
 130                 DEBUG(9, ("dcerpc_ndr_request_recv returned %s\n",
 131                           nt_errstr(state->ctx->status)));
 132                 goto fallback;
 133         }
 134
 135         state->ctx->status =
 136                 werror_to_ntstatus(state->d.out.result);
 137         if (!NT_STATUS_IS_OK(state->ctx->status)) {
 138                 DEBUG(9, ("dsrgetdcname returned %s\n",
 139                           nt_errstr(state->ctx->status)));
 140                 goto fallback;
 141         }
 142
 143         /* Hey, that was easy! */
 144
 145         state->info->dc_name = talloc_steal(state->info,
 146                                             state->d.out.info->dc_unc);
 147         if (*state->info->dc_name == '\\') state->info->dc_name++;
 148         if (*state->info->dc_name == '\\') state->info->dc_name++;
 149
 150         state->info->dc_address = talloc_steal(state->info,
 151                                                state->d.out.info->dc_address);
 152         if (*state->info->dc_address == '\\') state->info->dc_address++;
 153         if (*state->info->dc_address == '\\') state->info->dc_address++;
 154
 155         state->info->dns_name = talloc_steal(state->info,
 156                                              state->d.out.info->domain_name);
 157
 158         composite_done(state->ctx);
 159         return;
 160
 161  fallback:
 162
 163         state->g.in.logon_server = talloc_asprintf(
 164                 state, "\\\\%s",
 165                 dcerpc_server_name(state->my_domain->netlogon_pipe));
 166         state->g.in.domainname = state->info->name;
 167
 168         req = dcerpc_netr_GetAnyDCName_send(state->my_domain->netlogon_pipe,
 169                                             state, &state->g);
 170         if (composite_nomem(req, state->ctx)) return;
 171
 172         composite_continue_rpc(state->ctx, req, trusted_dom_info_recv_dcname,
 173                                state);
 174 }
 175
 176 static void trusted_dom_info_recv_dcname(struct rpc_request *req)
 177 {
 178         struct trusted_dom_info_state *state =
 179                 talloc_get_type(req->async.private,
 180                                 struct trusted_dom_info_state);
 181         struct composite_context *ctx;
 182         struct nbt_name name;
 183
 184         state->ctx->status = dcerpc_ndr_request_recv(req);
 185         if (!composite_is_ok(state->ctx)) return;
 186         state->ctx->status = werror_to_ntstatus(state->g.out.result);
 187         if (!composite_is_ok(state->ctx)) return;
 188
 189         state->info->dc_name = talloc_steal(state->info,
 190                                             state->g.out.dcname);
 191
 192         if (*state->info->dc_name == '\\') state->info->dc_name++;
 193         if (*state->info->dc_name == '\\') state->info->dc_name++;
 194
 195         make_nbt_name(&name, state->info->dc_name, 0x20);
 196         ctx = resolve_name_send(&name, state->service->task->event_ctx,
 197                                 lp_name_resolve_order());
 198
 199         composite_continue(state->ctx, ctx, trusted_dom_info_recv_dcaddr,
 200                            state);
 201 }
 202
 203 static void trusted_dom_info_recv_dcaddr(struct composite_context *ctx)
 204 {
 205         struct trusted_dom_info_state *state =
 206                 talloc_get_type(ctx->async.private_data,
 207                                 struct trusted_dom_info_state);
 208
 209         state->ctx->status = resolve_name_recv(ctx, state->info,
 210                                                &state->info->dc_address);
 211         if (!composite_is_ok(state->ctx)) return;
 212
 213         composite_done(state->ctx);
 214 }
 215
 216 NTSTATUS wb_trusted_dom_info_recv(struct composite_context *ctx,
 217                                   TALLOC_CTX *mem_ctx,
 218                                   struct wb_dom_info **result)
 219 {
 220         NTSTATUS status = composite_wait(ctx);
 221         if (NT_STATUS_IS_OK(status)) {
 222                 struct trusted_dom_info_state *state =
 223                         talloc_get_type(ctx->private_data,
 224                                         struct trusted_dom_info_state);
 225                 *result = talloc_steal(mem_ctx, state->info);
 226         }
 227         talloc_free(ctx);
 228         return status;
 229 }
 230
 231 NTSTATUS wb_trusted_dom_info(TALLOC_CTX *mem_ctx,
 232                              struct wbsrv_service *service,
 233                              const char *domain_name,
 234                              const struct dom_sid *sid,
 235                              struct wb_dom_info **result)
 236 {
 237         struct composite_context *ctx =
 238                 wb_trusted_dom_info_send(mem_ctx, service, domain_name, sid);
 239         return wb_trusted_dom_info_recv(ctx, mem_ctx, result);
 240 }