source3/rpc_server/rpc_ncacn_np.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  RPC Pipe client / server routines
   4  *  Copyright (C) Andrew Tridgell              1992-1998,
   5  *  Largely re-written : 2005
   6  *  Copyright (C) Jeremy Allison                1998 - 2005
   7  *  Copyright (C) Simo Sorce                    2010
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License as published by
  11  *  the Free Software Foundation; either version 3 of the License, or
  12  *  (at your option) any later version.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  21  */
  22
  23 #include "includes.h"
  24 #include "rpc_client/cli_pipe.h"
  25 #include "rpc_server/srv_pipe_internal.h"
  26 #include "rpc_dce.h"
  27 #include "../libcli/named_pipe_auth/npa_tstream.h"
  28 #include "rpc_server/rpc_ncacn_np.h"
  29 #include "librpc/gen_ndr/netlogon.h"
  30 #include "librpc/gen_ndr/auth.h"
  31 #include "../auth/auth_sam_reply.h"
  32 #include "auth.h"
  33
  34 #undef DBGC_CLASS
  35 #define DBGC_CLASS DBGC_RPC_SRV
  36
  37 static int pipes_open;
  38
  39 static struct pipes_struct *InternalPipes;
  40
  41 /* TODO
  42  * the following prototypes are declared here to avoid
  43  * code being moved about too much for a patch to be
  44  * disrupted / less obvious.
  45  *
  46  * these functions, and associated functions that they
  47  * call, should be moved behind a .so module-loading
  48  * system _anyway_.  so that's the next step...
  49  */
  50
  51 /****************************************************************************
  52  Internal Pipe iterator functions.
  53 ****************************************************************************/
  54
  55 struct pipes_struct *get_first_internal_pipe(void)
  56 {
  57         return InternalPipes;
  58 }
  59
  60 struct pipes_struct *get_next_internal_pipe(struct pipes_struct *p)
  61 {
  62         return p->next;
  63 }
  64
  65 static void free_pipe_rpc_context_internal( PIPE_RPC_FNS *list )
  66 {
  67         PIPE_RPC_FNS *tmp = list;
  68         PIPE_RPC_FNS *tmp2;
  69
  70         while (tmp) {
  71                 tmp2 = tmp->next;
  72                 SAFE_FREE(tmp);
  73                 tmp = tmp2;
  74         }
  75
  76         return;
  77 }
  78
  79 bool check_open_pipes(void)
  80 {
  81         struct pipes_struct *p;
  82
  83         for (p = InternalPipes; p != NULL; p = p->next) {
  84                 if (num_pipe_handles(p) != 0) {
  85                         return true;
  86                 }
  87         }
  88         return false;
  89 }
  90
  91 /****************************************************************************
  92  Close an rpc pipe.
  93 ****************************************************************************/
  94
  95 int close_internal_rpc_pipe_hnd(struct pipes_struct *p)
  96 {
  97         if (!p) {
  98                 DEBUG(0,("Invalid pipe in close_internal_rpc_pipe_hnd\n"));
  99                 return False;
 100         }
 101
 102         TALLOC_FREE(p->auth.auth_ctx);
 103
 104         free_pipe_rpc_context_internal( p->contexts );
 105
 106         /* Free the handles database. */
 107         close_policy_by_pipe(p);
 108
 109         DLIST_REMOVE(InternalPipes, p);
 110
 111         ZERO_STRUCTP(p);
 112
 113         return 0;
 114 }
 115
 116 /****************************************************************************
 117  Make an internal namedpipes structure
 118 ****************************************************************************/
 119
 120 struct pipes_struct *make_internal_rpc_pipe_p(TALLOC_CTX *mem_ctx,
 121                                               const struct ndr_syntax_id *syntax,
 122                                               struct client_address *client_id,
 123                                               const struct auth_serversupplied_info *session_info,
 124                                               struct messaging_context *msg_ctx)
 125 {
 126         struct pipes_struct *p;
 127
 128         DEBUG(4,("Create pipe requested %s\n",
 129                  get_pipe_name_from_syntax(talloc_tos(), syntax)));
 130
 131         p = TALLOC_ZERO_P(mem_ctx, struct pipes_struct);
 132
 133         if (!p) {
 134                 DEBUG(0,("ERROR! no memory for pipes_struct!\n"));
 135                 return NULL;
 136         }
 137
 138         p->mem_ctx = talloc_named(p, 0, "pipe %s %p",
 139                                  get_pipe_name_from_syntax(talloc_tos(),
 140                                                            syntax), p);
 141         if (p->mem_ctx == NULL) {
 142                 DEBUG(0,("open_rpc_pipe_p: talloc_init failed.\n"));
 143                 TALLOC_FREE(p);
 144                 return NULL;
 145         }
 146
 147         if (!init_pipe_handles(p, syntax)) {
 148                 DEBUG(0,("open_rpc_pipe_p: init_pipe_handles failed.\n"));
 149                 TALLOC_FREE(p);
 150                 return NULL;
 151         }
 152
 153         p->session_info = copy_serverinfo(p, session_info);
 154         if (p->session_info == NULL) {
 155                 DEBUG(0, ("open_rpc_pipe_p: copy_serverinfo failed\n"));
 156                 close_policy_by_pipe(p);
 157                 TALLOC_FREE(p);
 158                 return NULL;
 159         }
 160
 161         p->msg_ctx = msg_ctx;
 162
 163         DLIST_ADD(InternalPipes, p);
 164
 165         p->client_id = client_id;
 166
 167         p->endian = RPC_LITTLE_ENDIAN;
 168
 169         p->syntax = *syntax;
 170         p->transport = NCALRPC;
 171
 172         DEBUG(4,("Created internal pipe %s (pipes_open=%d)\n",
 173                  get_pipe_name_from_syntax(talloc_tos(), syntax), pipes_open));
 174
 175         talloc_set_destructor(p, close_internal_rpc_pipe_hnd);
 176
 177         return p;
 178 }
 179
 180 static NTSTATUS rpcint_dispatch(struct pipes_struct *p,
 181                                 TALLOC_CTX *mem_ctx,
 182                                 uint32_t opnum,
 183                                 const DATA_BLOB *in_data,
 184                                 DATA_BLOB *out_data)
 185 {
 186         uint32_t num_cmds = rpc_srv_get_pipe_num_cmds(&p->syntax);
 187         const struct api_struct *cmds = rpc_srv_get_pipe_cmds(&p->syntax);
 188         uint32_t i;
 189         bool ok;
 190
 191         /* set opnum */
 192         p->opnum = opnum;
 193
 194         for (i = 0; i < num_cmds; i++) {
 195                 if (cmds[i].opnum == opnum && cmds[i].fn != NULL) {
 196                         break;
 197                 }
 198         }
 199
 200         if (i == num_cmds) {
 201                 return NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE;
 202         }
 203
 204         p->in_data.data = *in_data;
 205         p->out_data.rdata = data_blob_null;
 206
 207         ok = cmds[i].fn(p);
 208         p->in_data.data = data_blob_null;
 209         if (!ok) {
 210                 data_blob_free(&p->out_data.rdata);
 211                 talloc_free_children(p->mem_ctx);
 212                 return NT_STATUS_RPC_CALL_FAILED;
 213         }
 214
 215         if (p->fault_state) {
 216                 p->fault_state = false;
 217                 data_blob_free(&p->out_data.rdata);
 218                 talloc_free_children(p->mem_ctx);
 219                 return NT_STATUS_RPC_CALL_FAILED;
 220         }
 221
 222         if (p->bad_handle_fault_state) {
 223                 p->bad_handle_fault_state = false;
 224                 data_blob_free(&p->out_data.rdata);
 225                 talloc_free_children(p->mem_ctx);
 226                 return NT_STATUS_RPC_SS_CONTEXT_MISMATCH;
 227         }
 228
 229         if (p->rng_fault_state) {
 230                 p->rng_fault_state = false;
 231                 data_blob_free(&p->out_data.rdata);
 232                 talloc_free_children(p->mem_ctx);
 233                 return NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE;
 234         }
 235
 236         *out_data = p->out_data.rdata;
 237         talloc_steal(mem_ctx, out_data->data);
 238         p->out_data.rdata = data_blob_null;
 239
 240         talloc_free_children(p->mem_ctx);
 241         return NT_STATUS_OK;
 242 }
 243
 244 struct rpcint_bh_state {
 245         struct pipes_struct *p;
 246 };
 247
 248 static bool rpcint_bh_is_connected(struct dcerpc_binding_handle *h)
 249 {
 250         struct rpcint_bh_state *hs = dcerpc_binding_handle_data(h,
 251                                      struct rpcint_bh_state);
 252
 253         if (!hs->p) {
 254                 return false;
 255         }
 256
 257         return true;
 258 }
 259
 260 static uint32_t rpcint_bh_set_timeout(struct dcerpc_binding_handle *h,
 261                                       uint32_t timeout)
 262 {
 263         /* TODO: implement timeouts */
 264         return UINT32_MAX;
 265 }
 266
 267 struct rpcint_bh_raw_call_state {
 268         DATA_BLOB in_data;
 269         DATA_BLOB out_data;
 270         uint32_t out_flags;
 271 };
 272
 273 static struct tevent_req *rpcint_bh_raw_call_send(TALLOC_CTX *mem_ctx,
 274                                                   struct tevent_context *ev,
 275                                                   struct dcerpc_binding_handle *h,
 276                                                   const struct GUID *object,
 277                                                   uint32_t opnum,
 278                                                   uint32_t in_flags,
 279                                                   const uint8_t *in_data,
 280                                                   size_t in_length)
 281 {
 282         struct rpcint_bh_state *hs =
 283                 dcerpc_binding_handle_data(h,
 284                 struct rpcint_bh_state);
 285         struct tevent_req *req;
 286         struct rpcint_bh_raw_call_state *state;
 287         bool ok;
 288         NTSTATUS status;
 289
 290         req = tevent_req_create(mem_ctx, &state,
 291                                 struct rpcint_bh_raw_call_state);
 292         if (req == NULL) {
 293                 return NULL;
 294         }
 295         state->in_data.data = discard_const_p(uint8_t, in_data);
 296         state->in_data.length = in_length;
 297
 298         ok = rpcint_bh_is_connected(h);
 299         if (!ok) {
 300                 tevent_req_nterror(req, NT_STATUS_INVALID_CONNECTION);
 301                 return tevent_req_post(req, ev);
 302         }
 303
 304         /* TODO: allow async */
 305         status = rpcint_dispatch(hs->p, state, opnum,
 306                                  &state->in_data,
 307                                  &state->out_data);
 308         if (!NT_STATUS_IS_OK(status)) {
 309                 tevent_req_nterror(req, status);
 310                 return tevent_req_post(req, ev);
 311         }
 312
 313         tevent_req_done(req);
 314         return tevent_req_post(req, ev);
 315 }
 316
 317 static NTSTATUS rpcint_bh_raw_call_recv(struct tevent_req *req,
 318                                         TALLOC_CTX *mem_ctx,
 319                                         uint8_t **out_data,
 320                                         size_t *out_length,
 321                                         uint32_t *out_flags)
 322 {
 323         struct rpcint_bh_raw_call_state *state =
 324                 tevent_req_data(req,
 325                 struct rpcint_bh_raw_call_state);
 326         NTSTATUS status;
 327
 328         if (tevent_req_is_nterror(req, &status)) {
 329                 tevent_req_received(req);
 330                 return status;
 331         }
 332
 333         *out_data = talloc_move(mem_ctx, &state->out_data.data);
 334         *out_length = state->out_data.length;
 335         *out_flags = 0;
 336         tevent_req_received(req);
 337         return NT_STATUS_OK;
 338 }
 339
 340 struct rpcint_bh_disconnect_state {
 341         uint8_t _dummy;
 342 };
 343
 344 static struct tevent_req *rpcint_bh_disconnect_send(TALLOC_CTX *mem_ctx,
 345                                                 struct tevent_context *ev,
 346                                                 struct dcerpc_binding_handle *h)
 347 {
 348         struct rpcint_bh_state *hs = dcerpc_binding_handle_data(h,
 349                                      struct rpcint_bh_state);
 350         struct tevent_req *req;
 351         struct rpcint_bh_disconnect_state *state;
 352         bool ok;
 353
 354         req = tevent_req_create(mem_ctx, &state,
 355                                 struct rpcint_bh_disconnect_state);
 356         if (req == NULL) {
 357                 return NULL;
 358         }
 359
 360         ok = rpcint_bh_is_connected(h);
 361         if (!ok) {
 362                 tevent_req_nterror(req, NT_STATUS_INVALID_CONNECTION);
 363                 return tevent_req_post(req, ev);
 364         }
 365
 366         /*
 367          * TODO: do a real async disconnect ...
 368          *
 369          * For now the caller needs to free pipes_struct
 370          */
 371         hs->p = NULL;
 372
 373         tevent_req_done(req);
 374         return tevent_req_post(req, ev);
 375 }
 376
 377 static NTSTATUS rpcint_bh_disconnect_recv(struct tevent_req *req)
 378 {
 379         NTSTATUS status;
 380
 381         if (tevent_req_is_nterror(req, &status)) {
 382                 tevent_req_received(req);
 383                 return status;
 384         }
 385
 386         tevent_req_received(req);
 387         return NT_STATUS_OK;
 388 }
 389
 390 static bool rpcint_bh_ref_alloc(struct dcerpc_binding_handle *h)
 391 {
 392         return true;
 393 }
 394
 395 static void rpcint_bh_do_ndr_print(struct dcerpc_binding_handle *h,
 396                                    int ndr_flags,
 397                                    const void *_struct_ptr,
 398                                    const struct ndr_interface_call *call)
 399 {
 400         void *struct_ptr = discard_const(_struct_ptr);
 401
 402         if (DEBUGLEVEL < 11) {
 403                 return;
 404         }
 405
 406         if (ndr_flags & NDR_IN) {
 407                 ndr_print_function_debug(call->ndr_print,
 408                                          call->name,
 409                                          ndr_flags,
 410                                          struct_ptr);
 411         }
 412         if (ndr_flags & NDR_OUT) {
 413                 ndr_print_function_debug(call->ndr_print,
 414                                          call->name,
 415                                          ndr_flags,
 416                                          struct_ptr);
 417         }
 418 }
 419
 420 static const struct dcerpc_binding_handle_ops rpcint_bh_ops = {
 421         .name                   = "rpcint",
 422         .is_connected           = rpcint_bh_is_connected,
 423         .set_timeout            = rpcint_bh_set_timeout,
 424         .raw_call_send          = rpcint_bh_raw_call_send,
 425         .raw_call_recv          = rpcint_bh_raw_call_recv,
 426         .disconnect_send        = rpcint_bh_disconnect_send,
 427         .disconnect_recv        = rpcint_bh_disconnect_recv,
 428
 429         .ref_alloc              = rpcint_bh_ref_alloc,
 430         .do_ndr_print           = rpcint_bh_do_ndr_print,
 431 };
 432
 433 static NTSTATUS rpcint_binding_handle_ex(TALLOC_CTX *mem_ctx,
 434                         const struct ndr_syntax_id *abstract_syntax,
 435                         const struct ndr_interface_table *ndr_table,
 436                         struct client_address *client_id,
 437                         const struct auth_serversupplied_info *session_info,
 438                         struct messaging_context *msg_ctx,
 439                         struct dcerpc_binding_handle **binding_handle)
 440 {
 441         struct dcerpc_binding_handle *h;
 442         struct rpcint_bh_state *hs;
 443
 444         if (ndr_table) {
 445                 abstract_syntax = &ndr_table->syntax_id;
 446         }
 447
 448         h = dcerpc_binding_handle_create(mem_ctx,
 449                                          &rpcint_bh_ops,
 450                                          NULL,
 451                                          ndr_table,
 452                                          &hs,
 453                                          struct rpcint_bh_state,
 454                                          __location__);
 455         if (h == NULL) {
 456                 return NT_STATUS_NO_MEMORY;
 457         }
 458         hs->p = make_internal_rpc_pipe_p(hs,
 459                                          abstract_syntax,
 460                                          client_id,
 461                                          session_info,
 462                                          msg_ctx);
 463         if (hs->p == NULL) {
 464                 TALLOC_FREE(h);
 465                 return NT_STATUS_NO_MEMORY;
 466         }
 467
 468         *binding_handle = h;
 469         return NT_STATUS_OK;
 470 }
 471 /**
 472  * @brief Create a new DCERPC Binding Handle which uses a local dispatch function.
 473  *
 474  * @param[in]  mem_ctx  The memory context to use.
 475  *
 476  * @param[in]  ndr_table Normally the ndr_table_<name>.
 477  *
 478  * @param[in]  client_id The info about the connected client.
 479  *
 480  * @param[in]  serversupplied_info The server supplied authentication function.
 481  *
 482  * @param[in]  msg_ctx   The messaging context that can be used by the server
 483  *
 484  * @param[out] binding_handle  A pointer to store the connected
 485  *                             dcerpc_binding_handle
 486  *
 487  * @return              NT_STATUS_OK on success, a corresponding NT status if an
 488  *                      error occured.
 489  *
 490  * @code
 491  *   struct dcerpc_binding_handle *winreg_binding;
 492  *   NTSTATUS status;
 493  *
 494  *   status = rpcint_binding_handle(tmp_ctx,
 495  *                                  &ndr_table_winreg,
 496  *                                  p->client_id,
 497  *                                  p->session_info,
 498  *                                  p->msg_ctx
 499  *                                  &winreg_binding);
 500  * @endcode
 501  */
 502 NTSTATUS rpcint_binding_handle(TALLOC_CTX *mem_ctx,
 503                                const struct ndr_interface_table *ndr_table,
 504                                struct client_address *client_id,
 505                                const struct auth_serversupplied_info *session_info,
 506                                struct messaging_context *msg_ctx,
 507                                struct dcerpc_binding_handle **binding_handle)
 508 {
 509         return rpcint_binding_handle_ex(mem_ctx, NULL, ndr_table, client_id,
 510                                         session_info, msg_ctx, binding_handle);
 511 }
 512
 513 /**
 514  * @internal
 515  *
 516  * @brief Create a new RPC client context which uses a local transport.
 517  *
 518  * This creates a local transport. It is a shortcut to directly call the server
 519  * functions and avoid marschalling.
 520  *
 521  * @param[in]  mem_ctx  The memory context to use.
 522  *
 523  * @param[in]  abstract_syntax Normally the syntax_id of the autogenerated
 524  *                             ndr_table_<name>.
 525  *
 526  * @param[in]  serversupplied_info The server supplied authentication function.
 527  *
 528  * @param[in]  client_id The client address information.
 529  *
 530  * @param[in]  msg_ctx  The messaging context to use.
 531  *
 532  * @param[out] presult  A pointer to store the connected rpc client pipe.
 533  *
 534  * @return              NT_STATUS_OK on success, a corresponding NT status if an
 535  *                      error occured.
 536  *
 537  * @code
 538  *   struct rpc_pipe_client *winreg_pipe;
 539  *   NTSTATUS status;
 540  *
 541  *   status = rpc_pipe_open_internal(tmp_ctx,
 542  *                                   &ndr_table_winreg.syntax_id,
 543  *                                   p->session_info,
 544  *                                   client_id,
 545  *                                   &winreg_pipe);
 546  * @endcode
 547  */
 548 NTSTATUS rpc_pipe_open_internal(TALLOC_CTX *mem_ctx,
 549                                 const struct ndr_syntax_id *abstract_syntax,
 550                                 const struct auth_serversupplied_info *serversupplied_info,
 551                                 struct client_address *client_id,
 552                                 struct messaging_context *msg_ctx,
 553                                 struct rpc_pipe_client **presult)
 554 {
 555         struct rpc_pipe_client *result;
 556         NTSTATUS status;
 557
 558         result = TALLOC_ZERO_P(mem_ctx, struct rpc_pipe_client);
 559         if (result == NULL) {
 560                 return NT_STATUS_NO_MEMORY;
 561         }
 562
 563         result->abstract_syntax = *abstract_syntax;
 564         result->transfer_syntax = ndr_transfer_syntax;
 565
 566         if (client_id == NULL) {
 567                 static struct client_address unknown;
 568                 strlcpy(unknown.addr, "<UNKNOWN>", sizeof(unknown.addr));
 569                 unknown.name = "<UNKNOWN>";
 570                 client_id = &unknown;
 571         }
 572
 573         result->max_xmit_frag = -1;
 574         result->max_recv_frag = -1;
 575
 576         status = rpcint_binding_handle_ex(result,
 577                                           abstract_syntax,
 578                                           NULL,
 579                                           client_id,
 580                                           serversupplied_info,
 581                                           msg_ctx,
 582                                           &result->binding_handle);
 583         if (!NT_STATUS_IS_OK(status)) {
 584                 TALLOC_FREE(result);
 585                 return status;
 586         }
 587
 588         *presult = result;
 589         return NT_STATUS_OK;
 590 }
 591
 592 /****************************************************************************
 593  * External pipes functions
 594  ***************************************************************************/
 595
 596
 597 struct np_proxy_state *make_external_rpc_pipe_p(TALLOC_CTX *mem_ctx,
 598                                 const char *pipe_name,
 599                                 const struct tsocket_address *local_address,
 600                                 const struct tsocket_address *remote_address,
 601                                 const struct auth_serversupplied_info *session_info)
 602 {
 603         struct np_proxy_state *result;
 604         char *socket_np_dir;
 605         const char *socket_dir;
 606         struct tevent_context *ev;
 607         struct tevent_req *subreq;
 608         struct auth_session_info_transport *session_info_t;
 609         struct auth_user_info_dc *user_info_dc;
 610         union netr_Validation val;
 611         NTSTATUS status;
 612         bool ok;
 613         int ret;
 614         int sys_errno;
 615
 616         result = talloc(mem_ctx, struct np_proxy_state);
 617         if (result == NULL) {
 618                 DEBUG(0, ("talloc failed\n"));
 619                 return NULL;
 620         }
 621
 622         result->read_queue = tevent_queue_create(result, "np_read");
 623         if (result->read_queue == NULL) {
 624                 DEBUG(0, ("tevent_queue_create failed\n"));
 625                 goto fail;
 626         }
 627
 628         result->write_queue = tevent_queue_create(result, "np_write");
 629         if (result->write_queue == NULL) {
 630                 DEBUG(0, ("tevent_queue_create failed\n"));
 631                 goto fail;
 632         }
 633
 634         ev = s3_tevent_context_init(talloc_tos());
 635         if (ev == NULL) {
 636                 DEBUG(0, ("s3_tevent_context_init failed\n"));
 637                 goto fail;
 638         }
 639
 640         socket_dir = lp_parm_const_string(
 641                 GLOBAL_SECTION_SNUM, "external_rpc_pipe", "socket_dir",
 642                 lp_ncalrpc_dir());
 643         if (socket_dir == NULL) {
 644                 DEBUG(0, ("externan_rpc_pipe:socket_dir not set\n"));
 645                 goto fail;
 646         }
 647         socket_np_dir = talloc_asprintf(talloc_tos(), "%s/np", socket_dir);
 648         if (socket_np_dir == NULL) {
 649                 DEBUG(0, ("talloc_asprintf failed\n"));
 650                 goto fail;
 651         }
 652
 653         session_info_t = talloc_zero(talloc_tos(), struct auth_session_info_transport);
 654         if (session_info_t == NULL) {
 655                 DEBUG(0, ("talloc failed\n"));
 656                 goto fail;
 657         }
 658
 659         /* Send the named_pipe_auth server the user's full token */
 660         session_info_t->security_token = session_info->security_token;
 661         session_info_t->session_key = session_info->user_session_key;
 662
 663         val.sam3 = session_info->info3;
 664
 665         /* Convert into something we can build a struct
 666          * auth_session_info_transport from.  Most of the work here
 667          * will be to convert the SIDS, which we will then ignore, but
 668          * this is the easier way to handle it */
 669         status = make_user_info_dc_netlogon_validation(talloc_tos(), "", 3, &val, &user_info_dc);
 670         if (!NT_STATUS_IS_OK(status)) {
 671                 DEBUG(0, ("conversion of info3 into user_info_dc failed!\n"));
 672                 goto fail;
 673         }
 674
 675         session_info_t->info = talloc_move(session_info_t, &user_info_dc->info);
 676         talloc_free(user_info_dc);
 677
 678         become_root();
 679         subreq = tstream_npa_connect_send(talloc_tos(), ev,
 680                                           socket_np_dir,
 681                                           pipe_name,
 682                                           remote_address, /* client_addr */
 683                                           NULL, /* client_name */
 684                                           local_address, /* server_addr */
 685                                           NULL, /* server_name */
 686                                           session_info_t);
 687         if (subreq == NULL) {
 688                 unbecome_root();
 689                 DEBUG(0, ("tstream_npa_connect_send to %s for pipe %s and "
 690                           "user %s\\%s failed\n",
 691                           socket_np_dir, pipe_name, session_info_t->info->domain_name,
 692                           session_info_t->info->account_name));
 693                 goto fail;
 694         }
 695         ok = tevent_req_poll(subreq, ev);
 696         unbecome_root();
 697         if (!ok) {
 698                 DEBUG(0, ("tevent_req_poll to %s for pipe %s and user %s\\%s "
 699                           "failed for tstream_npa_connect: %s\n",
 700                           socket_np_dir, pipe_name, session_info_t->info->domain_name,
 701                           session_info_t->info->account_name,
 702                           strerror(errno)));
 703                 goto fail;
 704
 705         }
 706         ret = tstream_npa_connect_recv(subreq, &sys_errno,
 707                                        result,
 708                                        &result->npipe,
 709                                        &result->file_type,
 710                                        &result->device_state,
 711                                        &result->allocation_size);
 712         TALLOC_FREE(subreq);
 713         if (ret != 0) {
 714                 DEBUG(0, ("tstream_npa_connect_recv  to %s for pipe %s and "
 715                           "user %s\\%s failed: %s\n",
 716                           socket_np_dir, pipe_name, session_info_t->info->domain_name,
 717                           session_info_t->info->account_name,
 718                           strerror(sys_errno)));
 719                 goto fail;
 720         }
 721
 722         return result;
 723
 724  fail:
 725         TALLOC_FREE(result);
 726         return NULL;
 727 }
 728
 729 static NTSTATUS rpc_pipe_open_external(TALLOC_CTX *mem_ctx,
 730                                 const char *pipe_name,
 731                                 const struct ndr_syntax_id *abstract_syntax,
 732                                 const struct auth_serversupplied_info *session_info,
 733                                 struct rpc_pipe_client **_result)
 734 {
 735         struct tsocket_address *local, *remote;
 736         struct rpc_pipe_client *result = NULL;
 737         struct np_proxy_state *proxy_state = NULL;
 738         struct pipe_auth_data *auth;
 739         NTSTATUS status;
 740         int ret;
 741
 742         /* this is an internal connection, fake up ip addresses */
 743         ret = tsocket_address_inet_from_strings(talloc_tos(), "ip",
 744                                                 NULL, 0, &local);
 745         if (ret) {
 746                 return NT_STATUS_NO_MEMORY;
 747         }
 748         ret = tsocket_address_inet_from_strings(talloc_tos(), "ip",
 749                                                 NULL, 0, &remote);
 750         if (ret) {
 751                 return NT_STATUS_NO_MEMORY;
 752         }
 753
 754         proxy_state = make_external_rpc_pipe_p(mem_ctx, pipe_name,
 755                                                 local, remote, session_info);
 756         if (!proxy_state) {
 757                 return NT_STATUS_UNSUCCESSFUL;
 758         }
 759
 760         result = talloc_zero(mem_ctx, struct rpc_pipe_client);
 761         if (result == NULL) {
 762                 status = NT_STATUS_NO_MEMORY;
 763                 goto done;
 764         }
 765
 766         result->abstract_syntax = *abstract_syntax;
 767         result->transfer_syntax = ndr_transfer_syntax;
 768
 769         result->desthost = get_myname(result);
 770         result->srv_name_slash = talloc_asprintf_strupper_m(
 771                 result, "\\\\%s", result->desthost);
 772         if ((result->desthost == NULL) || (result->srv_name_slash == NULL)) {
 773                 status = NT_STATUS_NO_MEMORY;
 774                 goto done;
 775         }
 776
 777         result->max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
 778         result->max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
 779
 780         status = rpc_transport_tstream_init(result,
 781                                             &proxy_state->npipe,
 782                                             &result->transport);
 783         if (!NT_STATUS_IS_OK(status)) {
 784                 goto done;
 785         }
 786
 787         result->binding_handle = rpccli_bh_create(result);
 788         if (result->binding_handle == NULL) {
 789                 status = NT_STATUS_NO_MEMORY;
 790                 DEBUG(0, ("Failed to create binding handle.\n"));
 791                 goto done;
 792         }
 793
 794         result->auth = talloc_zero(result, struct pipe_auth_data);
 795         if (!result->auth) {
 796                 status = NT_STATUS_NO_MEMORY;
 797                 goto done;
 798         }
 799         result->auth->auth_type = DCERPC_AUTH_TYPE_NONE;
 800         result->auth->auth_level = DCERPC_AUTH_LEVEL_NONE;
 801
 802         status = rpccli_anon_bind_data(result, &auth);
 803         if (!NT_STATUS_IS_OK(status)) {
 804                 DEBUG(0, ("Failed to initialize anonymous bind.\n"));
 805                 goto done;
 806         }
 807
 808         status = rpc_pipe_bind(result, auth);
 809         if (!NT_STATUS_IS_OK(status)) {
 810                 DEBUG(0, ("Failed to bind external pipe.\n"));
 811                 goto done;
 812         }
 813
 814 done:
 815         if (!NT_STATUS_IS_OK(status)) {
 816                 TALLOC_FREE(result);
 817         }
 818         TALLOC_FREE(proxy_state);
 819         *_result = result;
 820         return status;
 821 }
 822
 823 /**
 824  * @brief Create a new RPC client context which uses a local dispatch function.
 825  *
 826  * @param mem_ctx       The memory context on which thje pipe will ultimately
 827  *                      be allocated
 828  * @param name          The pipe name to connect to.
 829  * @param session_info  Credentials to use for the connection.
 830  * @param pipe          [in|out] Checks if a pipe is connected, and connects it
 831  *                               if not
 832  *
 833  * @return              NT_STATUS_OK on success, a corresponding NT status if
 834  *                      an error occured.
 835  */
 836
 837 NTSTATUS rpc_pipe_open_interface(TALLOC_CTX *mem_ctx,
 838                                  const struct ndr_syntax_id *syntax,
 839                                  const struct auth_serversupplied_info *session_info,
 840                                  struct client_address *client_id,
 841                                  struct messaging_context *msg_ctx,
 842                                  struct rpc_pipe_client **cli_pipe)
 843 {
 844         struct rpc_pipe_client *cli = NULL;
 845         const char *server_type;
 846         const char *pipe_name;
 847         NTSTATUS status;
 848         TALLOC_CTX *tmp_ctx;
 849
 850         if (cli_pipe && rpccli_is_connected(*cli_pipe)) {
 851                 return NT_STATUS_OK;
 852         } else {
 853                 TALLOC_FREE(*cli_pipe);
 854         }
 855
 856         tmp_ctx = talloc_stackframe();
 857         if (tmp_ctx == NULL) {
 858                 return NT_STATUS_NO_MEMORY;
 859         }
 860
 861         pipe_name = get_pipe_name_from_syntax(tmp_ctx, syntax);
 862         if (pipe_name == NULL) {
 863                 status = NT_STATUS_INVALID_PARAMETER;
 864                 goto done;
 865         }
 866
 867         while (pipe_name[0] == '\\') {
 868                 pipe_name++;
 869         }
 870
 871         DEBUG(5, ("Connecting to %s pipe.\n", pipe_name));
 872
 873         server_type = lp_parm_const_string(GLOBAL_SECTION_SNUM,
 874                                            "rpc_server", pipe_name,
 875                                            "embedded");
 876
 877         if (StrCaseCmp(server_type, "embedded") == 0) {
 878                 status = rpc_pipe_open_internal(tmp_ctx,
 879                                                 syntax, session_info,
 880                                                 client_id, msg_ctx,
 881                                                 &cli);
 882                 if (!NT_STATUS_IS_OK(status)) {
 883                         goto done;
 884                 }
 885         } else if (StrCaseCmp(server_type, "daemon") == 0 ||
 886                    StrCaseCmp(server_type, "external") == 0) {
 887                 /* It would be nice to just use rpc_pipe_open_ncalrpc() but
 888                  * for now we need to use the special proxy setup to connect
 889                  * to spoolssd. */
 890
 891                 status = rpc_pipe_open_external(tmp_ctx,
 892                                                 pipe_name, syntax,
 893                                                 session_info,
 894                                                 &cli);
 895                 if (!NT_STATUS_IS_OK(status)) {
 896                         goto done;
 897                 }
 898         } else {
 899                 status = NT_STATUS_NOT_IMPLEMENTED;
 900                 DEBUG(0, ("Wrong servertype specified in config file: %s",
 901                           nt_errstr(status)));
 902                 goto done;
 903         }
 904
 905         status = NT_STATUS_OK;
 906 done:
 907         if (NT_STATUS_IS_OK(status)) {
 908                 *cli_pipe = talloc_move(mem_ctx, &cli);
 909         }
 910         TALLOC_FREE(tmp_ctx);
 911         return status;
 912 }