source4/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/resolve/resolve.h"
  26 #include "libcli/security/proto.h"
  27 #include "winbind/wb_server.h"
  28 #include "smbd/service_task.h"
  29 #include "librpc/gen_ndr/ndr_netlogon_c.h"
  30
  31 struct trusted_dom_info_state {
  32         struct composite_context *ctx;
  33         struct wbsrv_service *service;
  34         struct wbsrv_domain *my_domain;
  35
  36         struct netr_DsRGetDCName d;
  37         struct netr_GetAnyDCName g;
  38
  39         struct wb_dom_info *info;
  40 };
  41
  42 static void trusted_dom_info_recv_domain(struct composite_context *ctx);
  43 static void trusted_dom_info_recv_dsr(struct rpc_request *req);
  44 static void trusted_dom_info_recv_dcname(struct rpc_request *req);
  45 static void trusted_dom_info_recv_dcaddr(struct composite_context *ctx);
  46
  47 struct composite_context *wb_trusted_dom_info_send(TALLOC_CTX *mem_ctx,
  48                                                    struct wbsrv_service *service,
  49                                                    const char *domain_name,
  50                                                    const struct dom_sid *sid)
  51 {
  52         struct composite_context *result, *ctx;
  53         struct trusted_dom_info_state *state;
  54
  55         result = talloc(mem_ctx, struct composite_context);
  56         if (result == NULL) goto failed;
  57         result->state = COMPOSITE_STATE_IN_PROGRESS;
  58         result->async.fn = NULL;
  59         result->event_ctx = service->task->event_ctx;
  60
  61         state = talloc(result, struct trusted_dom_info_state);
  62         if (state == NULL) goto failed;
  63         state->ctx = result;
  64         result->private_data = state;
  65
  66         state->info = talloc_zero(state, struct wb_dom_info);
  67         if (state->info == NULL) goto failed;
  68
  69         state->service = service;
  70
  71         state->info->sid = dom_sid_dup(state->info, sid);
  72         if (state->info->sid == NULL) goto failed;
  73
  74         state->info->name = talloc_strdup(state->info, domain_name);
  75         if (state->info->name == NULL) goto failed;
  76
  77         ctx = wb_sid2domain_send(state, service, service->primary_sid);
  78         if (ctx == NULL) goto failed;
  79
  80         ctx->async.fn = trusted_dom_info_recv_domain;
  81         ctx->async.private_data = state;
  82         return result;
  83
  84  failed:
  85         talloc_free(result);
  86         return NULL;
  87 }
  88
  89 static void trusted_dom_info_recv_domain(struct composite_context *ctx)
  90 {
  91         struct trusted_dom_info_state *state =
  92                 talloc_get_type(ctx->async.private_data,
  93                                 struct trusted_dom_info_state);
  94         struct rpc_request *req;
  95
  96         state->ctx->status = wb_sid2domain_recv(ctx, &state->my_domain);
  97         if (!composite_is_ok(state->ctx)) return;
  98
  99         state->d.in.server_unc =
 100                 talloc_asprintf(state, "\\\\%s",
 101                                 state->my_domain->info->dc_name);
 102         if (composite_nomem(state->d.in.server_unc,
 103                             state->ctx)) return;
 104
 105         state->d.in.domain_name = state->info->name;
 106         state->d.in.domain_guid = NULL;
 107         state->d.in.site_guid = NULL;
 108         state->d.in.flags = 0x40000000;
 109
 110         req = dcerpc_netr_DsRGetDCName_send(state->my_domain->netlogon_pipe,
 111                                             state, &state->d);
 112         composite_continue_rpc(state->ctx, req, trusted_dom_info_recv_dsr,
 113                                state);
 114 }
 115
 116 /*
 117  * dcerpc_netr_DsRGetDCName has replied
 118  */
 119
 120 static void trusted_dom_info_recv_dsr(struct rpc_request *req)
 121 {
 122         struct trusted_dom_info_state *state =
 123                 talloc_get_type(req->async.private,
 124                                 struct trusted_dom_info_state);
 125
 126         state->ctx->status = dcerpc_ndr_request_recv(req);
 127         if (!NT_STATUS_IS_OK(state->ctx->status)) {
 128                 DEBUG(9, ("dcerpc_ndr_request_recv returned %s\n",
 129                           nt_errstr(state->ctx->status)));
 130                 goto fallback;
 131         }
 132
 133         state->ctx->status =
 134                 werror_to_ntstatus(state->d.out.result);
 135         if (!NT_STATUS_IS_OK(state->ctx->status)) {
 136                 DEBUG(9, ("dsrgetdcname returned %s\n",
 137                           nt_errstr(state->ctx->status)));
 138                 goto fallback;
 139         }
 140
 141         /* Hey, that was easy! */
 142
 143         state->info->dc_name = talloc_steal(state->info,
 144                                             state->d.out.info->dc_unc);
 145         if (*state->info->dc_name == '\\') state->info->dc_name++;
 146         if (*state->info->dc_name == '\\') state->info->dc_name++;
 147
 148         state->info->dc_address = talloc_steal(state->info,
 149                                                state->d.out.info->dc_address);
 150         if (*state->info->dc_address == '\\') state->info->dc_address++;
 151         if (*state->info->dc_address == '\\') state->info->dc_address++;
 152
 153         state->info->dns_name = talloc_steal(state->info,
 154                                              state->d.out.info->domain_name);
 155
 156         composite_done(state->ctx);
 157         return;
 158
 159  fallback:
 160
 161         state->g.in.logon_server = talloc_asprintf(
 162                 state, "\\\\%s",
 163                 dcerpc_server_name(state->my_domain->netlogon_pipe));
 164         state->g.in.domainname = state->info->name;
 165
 166         req = dcerpc_netr_GetAnyDCName_send(state->my_domain->netlogon_pipe,
 167                                             state, &state->g);
 168         if (composite_nomem(req, state->ctx)) return;
 169
 170         composite_continue_rpc(state->ctx, req, trusted_dom_info_recv_dcname,
 171                                state);
 172 }
 173
 174 static void trusted_dom_info_recv_dcname(struct rpc_request *req)
 175 {
 176         struct trusted_dom_info_state *state =
 177                 talloc_get_type(req->async.private,
 178                                 struct trusted_dom_info_state);
 179         struct composite_context *ctx;
 180         struct nbt_name name;
 181
 182         state->ctx->status = dcerpc_ndr_request_recv(req);
 183         if (!composite_is_ok(state->ctx)) return;
 184         state->ctx->status = werror_to_ntstatus(state->g.out.result);
 185         if (!composite_is_ok(state->ctx)) return;
 186
 187         state->info->dc_name = talloc_steal(state->info,
 188                                             state->g.out.dcname);
 189
 190         if (*state->info->dc_name == '\\') state->info->dc_name++;
 191         if (*state->info->dc_name == '\\') state->info->dc_name++;
 192
 193         make_nbt_name(&name, state->info->dc_name, 0x20);
 194         ctx = resolve_name_send(&name, state->service->task->event_ctx,
 195                                 lp_name_resolve_order());
 196
 197         composite_continue(state->ctx, ctx, trusted_dom_info_recv_dcaddr,
 198                            state);
 199 }
 200
 201 static void trusted_dom_info_recv_dcaddr(struct composite_context *ctx)
 202 {
 203         struct trusted_dom_info_state *state =
 204                 talloc_get_type(ctx->async.private_data,
 205                                 struct trusted_dom_info_state);
 206
 207         state->ctx->status = resolve_name_recv(ctx, state->info,
 208                                                &state->info->dc_address);
 209         if (!composite_is_ok(state->ctx)) return;
 210
 211         composite_done(state->ctx);
 212 }
 213
 214 NTSTATUS wb_trusted_dom_info_recv(struct composite_context *ctx,
 215                                   TALLOC_CTX *mem_ctx,
 216                                   struct wb_dom_info **result)
 217 {
 218         NTSTATUS status = composite_wait(ctx);
 219         if (NT_STATUS_IS_OK(status)) {
 220                 struct trusted_dom_info_state *state =
 221                         talloc_get_type(ctx->private_data,
 222                                         struct trusted_dom_info_state);
 223                 *result = talloc_steal(mem_ctx, state->info);
 224         }
 225         talloc_free(ctx);
 226         return status;
 227 }
 228
 229 NTSTATUS wb_trusted_dom_info(TALLOC_CTX *mem_ctx,
 230                              struct wbsrv_service *service,
 231                              const char *domain_name,
 232                              const struct dom_sid *sid,
 233                              struct wb_dom_info **result)
 234 {
 235         struct composite_context *ctx =
 236                 wb_trusted_dom_info_send(mem_ctx, service, domain_name, sid);
 237         return wb_trusted_dom_info_recv(ctx, mem_ctx, result);
 238 }