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 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/composite/composite.h"
  24 #include "libcli/resolve/resolve.h"
  25 #include "libcli/security/security.h"
  26 #include "winbind/wb_server.h"
  27 #include "smbd/service_task.h"
  28 #include "librpc/gen_ndr/ndr_netlogon_c.h"
  29 #include "libcli/libcli.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 = composite_create(mem_ctx, service->task->event_ctx);
  56         if (result == NULL) goto failed;
  57
  58         state = talloc(result, struct trusted_dom_info_state);
  59         if (state == NULL) goto failed;
  60         state->ctx = result;
  61         result->private_data = state;
  62
  63         state->info = talloc_zero(state, struct wb_dom_info);
  64         if (state->info == NULL) goto failed;
  65
  66         state->service = service;
  67
  68         state->info->sid = dom_sid_dup(state->info, sid);
  69         if (state->info->sid == NULL) goto failed;
  70
  71         state->info->name = talloc_strdup(state->info, domain_name);
  72         if (state->info->name == NULL) goto failed;
  73
  74         ctx = wb_sid2domain_send(state, service, service->primary_sid);
  75         if (ctx == NULL) goto failed;
  76
  77         ctx->async.fn = trusted_dom_info_recv_domain;
  78         ctx->async.private_data = state;
  79         return result;
  80
  81  failed:
  82         talloc_free(result);
  83         return NULL;
  84 }
  85
  86 static void trusted_dom_info_recv_domain(struct composite_context *ctx)
  87 {
  88         struct trusted_dom_info_state *state =
  89                 talloc_get_type(ctx->async.private_data,
  90                                 struct trusted_dom_info_state);
  91         struct rpc_request *req;
  92
  93         state->ctx->status = wb_sid2domain_recv(ctx, &state->my_domain);
  94         if (!composite_is_ok(state->ctx)) return;
  95
  96         state->d.in.server_unc =
  97                 talloc_asprintf(state, "\\\\%s",
  98                                 dcerpc_server_name(state->my_domain->netlogon_pipe));
  99         if (composite_nomem(state->d.in.server_unc,
 100                             state->ctx)) return;
 101
 102         state->d.in.domain_name = state->info->name;
 103         state->d.in.domain_guid = NULL;
 104         state->d.in.site_guid = NULL;
 105         state->d.in.flags = DS_RETURN_DNS_NAME;
 106         state->d.out.info = talloc(state, struct netr_DsRGetDCNameInfo *);
 107         if (composite_nomem(state->d.out.info, state->ctx)) return;
 108
 109         req = dcerpc_netr_DsRGetDCName_send(state->my_domain->netlogon_pipe,
 110                                             state, &state->d);
 111         composite_continue_rpc(state->ctx, req, trusted_dom_info_recv_dsr,
 112                                state);
 113 }
 114
 115 /*
 116  * dcerpc_netr_DsRGetDCName has replied
 117  */
 118
 119 static void trusted_dom_info_recv_dsr(struct rpc_request *req)
 120 {
 121         struct trusted_dom_info_state *state =
 122                 talloc_get_type(req->async.private_data,
 123                                 struct trusted_dom_info_state);
 124
 125         state->ctx->status = dcerpc_ndr_request_recv(req);
 126         if (!NT_STATUS_IS_OK(state->ctx->status)) {
 127                 DEBUG(9, ("dcerpc_ndr_request_recv returned %s\n",
 128                           nt_errstr(state->ctx->status)));
 129                 goto fallback;
 130         }
 131
 132         state->ctx->status =
 133                 werror_to_ntstatus(state->d.out.result);
 134         if (!NT_STATUS_IS_OK(state->ctx->status)) {
 135                 DEBUG(9, ("dsrgetdcname returned %s\n",
 136                           nt_errstr(state->ctx->status)));
 137                 goto fallback;
 138         }
 139
 140         /* Hey, that was easy! */
 141         state->info->num_dcs = 1;
 142         state->info->dcs = talloc(state->info, struct nbt_dc_name);
 143         state->info->dcs[0].name = talloc_steal(state->info,
 144                                             (*state->d.out.info)->dc_unc);
 145         if (*state->info->dcs[0].name == '\\') state->info->dcs[0].name++;
 146         if (*state->info->dcs[0].name == '\\') state->info->dcs[0].name++;
 147
 148         state->info->dcs[0].address = talloc_steal(state->info,
 149                                                (*state->d.out.info)->dc_address);
 150         if (*state->info->dcs[0].address == '\\') state->info->dcs[0].address++;
 151         if (*state->info->dcs[0].address == '\\') state->info->dcs[0].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         state->g.out.dcname = talloc(state, const char *);
 166
 167         req = dcerpc_netr_GetAnyDCName_send(state->my_domain->netlogon_pipe,
 168                                             state, &state->g);
 169         if (composite_nomem(req, state->ctx)) return;
 170
 171         composite_continue_rpc(state->ctx, req, trusted_dom_info_recv_dcname,
 172                                state);
 173 }
 174
 175 static void trusted_dom_info_recv_dcname(struct rpc_request *req)
 176 {
 177         struct trusted_dom_info_state *state =
 178                 talloc_get_type(req->async.private_data,
 179                                 struct trusted_dom_info_state);
 180         struct composite_context *ctx;
 181         struct nbt_name name;
 182
 183         state->ctx->status = dcerpc_ndr_request_recv(req);
 184         if (!composite_is_ok(state->ctx)) return;
 185         state->ctx->status = werror_to_ntstatus(state->g.out.result);
 186         if (!composite_is_ok(state->ctx)) return;
 187
 188         /* Hey, that was easy! */
 189         state->info->num_dcs = 1;
 190         state->info->dcs = talloc(state->info, struct nbt_dc_name);
 191         state->info->dcs[0].name = talloc_steal(state->info,
 192                                             *(state->g.out.dcname));
 193         if (*state->info->dcs[0].name == '\\') state->info->dcs[0].name++;
 194         if (*state->info->dcs[0].name == '\\') state->info->dcs[0].name++;
 195
 196         make_nbt_name(&name, state->info->dcs[0].name, 0x20);
 197         ctx = resolve_name_send(lp_resolve_context(state->service->task->lp_ctx), state,
 198                                 &name, state->service->task->event_ctx);
 199
 200         composite_continue(state->ctx, ctx, trusted_dom_info_recv_dcaddr,
 201                            state);
 202 }
 203
 204 static void trusted_dom_info_recv_dcaddr(struct composite_context *ctx)
 205 {
 206         struct trusted_dom_info_state *state =
 207                 talloc_get_type(ctx->async.private_data,
 208                                 struct trusted_dom_info_state);
 209
 210         state->ctx->status = resolve_name_recv(ctx, state->info,
 211                                                &state->info->dcs[0].address);
 212         if (!composite_is_ok(state->ctx)) return;
 213
 214         composite_done(state->ctx);
 215 }
 216
 217 NTSTATUS wb_trusted_dom_info_recv(struct composite_context *ctx,
 218                                   TALLOC_CTX *mem_ctx,
 219                                   struct wb_dom_info **result)
 220 {
 221         NTSTATUS status = composite_wait(ctx);
 222         if (NT_STATUS_IS_OK(status)) {
 223                 struct trusted_dom_info_state *state =
 224                         talloc_get_type(ctx->private_data,
 225                                         struct trusted_dom_info_state);
 226                 *result = talloc_steal(mem_ctx, state->info);
 227         }
 228         talloc_free(ctx);
 229         return status;
 230 }
 231
 232 NTSTATUS wb_trusted_dom_info(TALLOC_CTX *mem_ctx,
 233                              struct wbsrv_service *service,
 234                              const char *domain_name,
 235                              const struct dom_sid *sid,
 236                              struct wb_dom_info **result)
 237 {
 238         struct composite_context *ctx =
 239                 wb_trusted_dom_info_send(mem_ctx, service, domain_name, sid);
 240         return wb_trusted_dom_info_recv(ctx, mem_ctx, result);
 241 }