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