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 #include "ntdomain.h"
  34 #include "../lib/tsocket/tsocket.h"
  35 #include "../lib/util/tevent_ntstatus.h"
  36 #include "rpc_contexts.h"
  37
  38 #undef DBGC_CLASS
  39 #define DBGC_CLASS DBGC_RPC_SRV
  40
  41 static int pipes_open;
  42
  43 static struct pipes_struct *InternalPipes;
  44
  45 /* TODO
  46  * the following prototypes are declared here to avoid
  47  * code being moved about too much for a patch to be
  48  * disrupted / less obvious.
  49  *
  50  * these functions, and associated functions that they
  51  * call, should be moved behind a .so module-loading
  52  * system _anyway_.  so that's the next step...
  53  */
  54
  55 /****************************************************************************
  56  Internal Pipe iterator functions.
  57 ****************************************************************************/
  58
  59 struct pipes_struct *get_first_internal_pipe(void)
  60 {
  61         return InternalPipes;
  62 }
  63
  64 struct pipes_struct *get_next_internal_pipe(struct pipes_struct *p)
  65 {
  66         return p->next;
  67 }
  68
  69 static void free_pipe_rpc_context_internal( PIPE_RPC_FNS *list )
  70 {
  71         PIPE_RPC_FNS *tmp = list;
  72         PIPE_RPC_FNS *tmp2;
  73
  74         while (tmp) {
  75                 tmp2 = tmp->next;
  76                 SAFE_FREE(tmp);
  77                 tmp = tmp2;
  78         }
  79
  80         return;
  81 }
  82
  83 bool check_open_pipes(void)
  84 {
  85         struct pipes_struct *p;
  86
  87         for (p = InternalPipes; p != NULL; p = p->next) {
  88                 if (num_pipe_handles(p) != 0) {
  89                         return true;
  90                 }
  91         }
  92         return false;
  93 }
  94
  95 /****************************************************************************
  96  Close an rpc pipe.
  97 ****************************************************************************/
  98
  99 int close_internal_rpc_pipe_hnd(struct pipes_struct *p)
 100 {
 101         if (!p) {
 102                 DEBUG(0,("Invalid pipe in close_internal_rpc_pipe_hnd\n"));
 103                 return False;
 104         }
 105
 106         TALLOC_FREE(p->auth.auth_ctx);
 107
 108         free_pipe_rpc_context_internal( p->contexts );
 109
 110         /* Free the handles database. */
 111         close_policy_by_pipe(p);
 112
 113         DLIST_REMOVE(InternalPipes, p);
 114
 115         ZERO_STRUCTP(p);
 116
 117         return 0;
 118 }
 119
 120 /****************************************************************************
 121  Make an internal namedpipes structure
 122 ****************************************************************************/
 123
 124 struct pipes_struct *make_internal_rpc_pipe_p(TALLOC_CTX *mem_ctx,
 125                                               const struct ndr_syntax_id *syntax,
 126                                               struct client_address *client_id,
 127                                               const struct auth_serversupplied_info *session_info,
 128                                               struct messaging_context *msg_ctx)
 129 {
 130         struct pipes_struct *p;
 131         struct pipe_rpc_fns *context_fns;
 132
 133         DEBUG(4,("Create pipe requested %s\n",
 134                  get_pipe_name_from_syntax(talloc_tos(), syntax)));
 135
 136         p = TALLOC_ZERO_P(mem_ctx, struct pipes_struct);
 137
 138         if (!p) {
 139                 DEBUG(0,("ERROR! no memory for pipes_struct!\n"));
 140                 return NULL;
 141         }
 142
 143         p->mem_ctx = talloc_named(p, 0, "pipe %s %p",
 144                                  get_pipe_name_from_syntax(talloc_tos(),
 145                                                            syntax), p);
 146         if (p->mem_ctx == NULL) {
 147                 DEBUG(0,("open_rpc_pipe_p: talloc_init failed.\n"));
 148                 TALLOC_FREE(p);
 149                 return NULL;
 150         }
 151
 152         if (!init_pipe_handles(p, syntax)) {
 153                 DEBUG(0,("open_rpc_pipe_p: init_pipe_handles failed.\n"));
 154                 TALLOC_FREE(p);
 155                 return NULL;
 156         }
 157
 158         p->session_info = copy_serverinfo(p, session_info);
 159         if (p->session_info == NULL) {
 160                 DEBUG(0, ("open_rpc_pipe_p: copy_serverinfo failed\n"));
 161                 close_policy_by_pipe(p);
 162                 TALLOC_FREE(p);
 163                 return NULL;
 164         }
 165
 166         p->msg_ctx = msg_ctx;
 167
 168         DLIST_ADD(InternalPipes, p);
 169
 170         p->client_id = client_id;
 171
 172         p->endian = RPC_LITTLE_ENDIAN;
 173
 174         p->syntax = *syntax;
 175         p->transport = NCALRPC;
 176
 177         context_fns = SMB_MALLOC_P(struct pipe_rpc_fns);
 178         if (context_fns == NULL) {
 179                 DEBUG(0,("malloc() failed!\n"));
 180                 return False;
 181         }
 182
 183         context_fns->next = context_fns->prev = NULL;
 184         context_fns->n_cmds = rpc_srv_get_pipe_num_cmds(syntax);
 185         context_fns->cmds = rpc_srv_get_pipe_cmds(syntax);
 186         context_fns->context_id = 0;
 187         context_fns->syntax = *syntax;
 188
 189         /* add to the list of open contexts */
 190         DLIST_ADD(p->contexts, context_fns);
 191
 192         DEBUG(4,("Created internal pipe %s (pipes_open=%d)\n",
 193                  get_pipe_name_from_syntax(talloc_tos(), syntax), pipes_open));
 194
 195         talloc_set_destructor(p, close_internal_rpc_pipe_hnd);
 196
 197         return p;
 198 }
 199
 200 static NTSTATUS rpcint_dispatch(struct pipes_struct *p,
 201                                 TALLOC_CTX *mem_ctx,
 202                                 uint32_t opnum,
 203                                 const DATA_BLOB *in_data,
 204                                 DATA_BLOB *out_data)
 205 {
 206         struct pipe_rpc_fns *fns = find_pipe_fns_by_context(p->contexts, 0);
 207         uint32_t num_cmds = fns->n_cmds;
 208         const struct api_struct *cmds = fns->cmds;
 209         uint32_t i;
 210         bool ok;
 211
 212         /* set opnum */
 213         p->opnum = opnum;
 214
 215         for (i = 0; i < num_cmds; i++) {
 216                 if (cmds[i].opnum == opnum && cmds[i].fn != NULL) {
 217                         break;
 218                 }
 219         }
 220
 221         if (i == num_cmds) {
 222                 return NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE;
 223         }
 224
 225         p->in_data.data = *in_data;
 226         p->out_data.rdata = data_blob_null;
 227
 228         ok = cmds[i].fn(p);
 229         p->in_data.data = data_blob_null;
 230         if (!ok) {
 231                 data_blob_free(&p->out_data.rdata);
 232                 talloc_free_children(p->mem_ctx);
 233                 return NT_STATUS_RPC_CALL_FAILED;
 234         }
 235
 236         if (p->fault_state) {
 237                 p->fault_state = false;
 238                 data_blob_free(&p->out_data.rdata);
 239                 talloc_free_children(p->mem_ctx);
 240                 return NT_STATUS_RPC_CALL_FAILED;
 241         }
 242
 243         if (p->bad_handle_fault_state) {
 244                 p->bad_handle_fault_state = false;
 245                 data_blob_free(&p->out_data.rdata);
 246                 talloc_free_children(p->mem_ctx);
 247                 return NT_STATUS_RPC_SS_CONTEXT_MISMATCH;
 248         }
 249
 250         if (p->rng_fault_state) {
 251                 p->rng_fault_state = false;
 252                 data_blob_free(&p->out_data.rdata);
 253                 talloc_free_children(p->mem_ctx);
 254                 return NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE;
 255         }
 256
 257         *out_data = p->out_data.rdata;
 258         talloc_steal(mem_ctx, out_data->data);
 259         p->out_data.rdata = data_blob_null;
 260
 261         talloc_free_children(p->mem_ctx);
 262         return NT_STATUS_OK;
 263 }
 264
 265 struct rpcint_bh_state {
 266         struct pipes_struct *p;
 267 };
 268
 269 static bool rpcint_bh_is_connected(struct dcerpc_binding_handle *h)
 270 {
 271         struct rpcint_bh_state *hs = dcerpc_binding_handle_data(h,
 272                                      struct rpcint_bh_state);
 273
 274         if (!hs->p) {
 275                 return false;
 276         }
 277
 278         return true;
 279 }
 280
 281 static uint32_t rpcint_bh_set_timeout(struct dcerpc_binding_handle *h,
 282                                       uint32_t timeout)
 283 {
 284         /* TODO: implement timeouts */
 285         return UINT32_MAX;
 286 }
 287
 288 struct rpcint_bh_raw_call_state {
 289         DATA_BLOB in_data;
 290         DATA_BLOB out_data;
 291         uint32_t out_flags;
 292 };
 293
 294 static struct tevent_req *rpcint_bh_raw_call_send(TALLOC_CTX *mem_ctx,
 295                                                   struct tevent_context *ev,
 296                                                   struct dcerpc_binding_handle *h,
 297                                                   const struct GUID *object,
 298                                                   uint32_t opnum,
 299                                                   uint32_t in_flags,
 300                                                   const uint8_t *in_data,
 301                                                   size_t in_length)
 302 {
 303         struct rpcint_bh_state *hs =
 304                 dcerpc_binding_handle_data(h,
 305                 struct rpcint_bh_state);
 306         struct tevent_req *req;
 307         struct rpcint_bh_raw_call_state *state;
 308         bool ok;
 309         NTSTATUS status;
 310
 311         req = tevent_req_create(mem_ctx, &state,
 312                                 struct rpcint_bh_raw_call_state);
 313         if (req == NULL) {
 314                 return NULL;
 315         }
 316         state->in_data.data = discard_const_p(uint8_t, in_data);
 317         state->in_data.length = in_length;
 318
 319         ok = rpcint_bh_is_connected(h);
 320         if (!ok) {
 321                 tevent_req_nterror(req, NT_STATUS_INVALID_CONNECTION);
 322                 return tevent_req_post(req, ev);
 323         }
 324
 325         /* TODO: allow async */
 326         status = rpcint_dispatch(hs->p, state, opnum,
 327                                  &state->in_data,
 328                                  &state->out_data);
 329         if (!NT_STATUS_IS_OK(status)) {
 330                 tevent_req_nterror(req, status);
 331                 return tevent_req_post(req, ev);
 332         }
 333
 334         tevent_req_done(req);
 335         return tevent_req_post(req, ev);
 336 }
 337
 338 static NTSTATUS rpcint_bh_raw_call_recv(struct tevent_req *req,
 339                                         TALLOC_CTX *mem_ctx,
 340                                         uint8_t **out_data,
 341                                         size_t *out_length,
 342                                         uint32_t *out_flags)
 343 {
 344         struct rpcint_bh_raw_call_state *state =
 345                 tevent_req_data(req,
 346                 struct rpcint_bh_raw_call_state);
 347         NTSTATUS status;
 348
 349         if (tevent_req_is_nterror(req, &status)) {
 350                 tevent_req_received(req);
 351                 return status;
 352         }
 353
 354         *out_data = talloc_move(mem_ctx, &state->out_data.data);
 355         *out_length = state->out_data.length;
 356         *out_flags = 0;
 357         tevent_req_received(req);
 358         return NT_STATUS_OK;
 359 }
 360
 361 struct rpcint_bh_disconnect_state {
 362         uint8_t _dummy;
 363 };
 364
 365 static struct tevent_req *rpcint_bh_disconnect_send(TALLOC_CTX *mem_ctx,
 366                                                 struct tevent_context *ev,
 367                                                 struct dcerpc_binding_handle *h)
 368 {
 369         struct rpcint_bh_state *hs = dcerpc_binding_handle_data(h,
 370                                      struct rpcint_bh_state);
 371         struct tevent_req *req;
 372         struct rpcint_bh_disconnect_state *state;
 373         bool ok;
 374
 375         req = tevent_req_create(mem_ctx, &state,
 376                                 struct rpcint_bh_disconnect_state);
 377         if (req == NULL) {
 378                 return NULL;
 379         }
 380
 381         ok = rpcint_bh_is_connected(h);
 382         if (!ok) {
 383                 tevent_req_nterror(req, NT_STATUS_INVALID_CONNECTION);
 384                 return tevent_req_post(req, ev);
 385         }
 386
 387         /*
 388          * TODO: do a real async disconnect ...
 389          *
 390          * For now the caller needs to free pipes_struct
 391          */
 392         hs->p = NULL;
 393
 394         tevent_req_done(req);
 395         return tevent_req_post(req, ev);
 396 }
 397
 398 static NTSTATUS rpcint_bh_disconnect_recv(struct tevent_req *req)
 399 {
 400         NTSTATUS status;
 401
 402         if (tevent_req_is_nterror(req, &status)) {
 403                 tevent_req_received(req);
 404                 return status;
 405         }
 406
 407         tevent_req_received(req);
 408         return NT_STATUS_OK;
 409 }
 410
 411 static bool rpcint_bh_ref_alloc(struct dcerpc_binding_handle *h)
 412 {
 413         return true;
 414 }
 415
 416 static void rpcint_bh_do_ndr_print(struct dcerpc_binding_handle *h,
 417                                    int ndr_flags,
 418                                    const void *_struct_ptr,
 419                                    const struct ndr_interface_call *call)
 420 {
 421         void *struct_ptr = discard_const(_struct_ptr);
 422
 423         if (DEBUGLEVEL < 11) {
 424                 return;
 425         }
 426
 427         if (ndr_flags & NDR_IN) {
 428                 ndr_print_function_debug(call->ndr_print,
 429                                          call->name,
 430                                          ndr_flags,
 431                                          struct_ptr);
 432         }
 433         if (ndr_flags & NDR_OUT) {
 434                 ndr_print_function_debug(call->ndr_print,
 435                                          call->name,
 436                                          ndr_flags,
 437                                          struct_ptr);
 438         }
 439 }
 440
 441 static const struct dcerpc_binding_handle_ops rpcint_bh_ops = {
 442         .name                   = "rpcint",
 443         .is_connected           = rpcint_bh_is_connected,
 444         .set_timeout            = rpcint_bh_set_timeout,
 445         .raw_call_send          = rpcint_bh_raw_call_send,
 446         .raw_call_recv          = rpcint_bh_raw_call_recv,
 447         .disconnect_send        = rpcint_bh_disconnect_send,
 448         .disconnect_recv        = rpcint_bh_disconnect_recv,
 449
 450         .ref_alloc              = rpcint_bh_ref_alloc,
 451         .do_ndr_print           = rpcint_bh_do_ndr_print,
 452 };
 453
 454 static NTSTATUS rpcint_binding_handle_ex(TALLOC_CTX *mem_ctx,
 455                         const struct ndr_syntax_id *abstract_syntax,
 456                         const struct ndr_interface_table *ndr_table,
 457                         struct client_address *client_id,
 458                         const struct auth_serversupplied_info *session_info,
 459                         struct messaging_context *msg_ctx,
 460                         struct dcerpc_binding_handle **binding_handle)
 461 {
 462         struct dcerpc_binding_handle *h;
 463         struct rpcint_bh_state *hs;
 464
 465         if (ndr_table) {
 466                 abstract_syntax = &ndr_table->syntax_id;
 467         }
 468
 469         h = dcerpc_binding_handle_create(mem_ctx,
 470                                          &rpcint_bh_ops,
 471                                          NULL,
 472                                          ndr_table,
 473                                          &hs,
 474                                          struct rpcint_bh_state,
 475                                          __location__);
 476         if (h == NULL) {
 477                 return NT_STATUS_NO_MEMORY;
 478         }
 479         hs->p = make_internal_rpc_pipe_p(hs,
 480                                          abstract_syntax,
 481                                          client_id,
 482                                          session_info,
 483                                          msg_ctx);
 484         if (hs->p == NULL) {
 485                 TALLOC_FREE(h);
 486                 return NT_STATUS_NO_MEMORY;
 487         }
 488
 489         *binding_handle = h;
 490         return NT_STATUS_OK;
 491 }
 492 /**
 493  * @brief Create a new DCERPC Binding Handle which uses a local dispatch function.
 494  *
 495  * @param[in]  mem_ctx  The memory context to use.
 496  *
 497  * @param[in]  ndr_table Normally the ndr_table_<name>.
 498  *
 499  * @param[in]  client_id The info about the connected client.
 500  *
 501  * @param[in]  serversupplied_info The server supplied authentication function.
 502  *
 503  * @param[in]  msg_ctx   The messaging context that can be used by the server
 504  *
 505  * @param[out] binding_handle  A pointer to store the connected
 506  *                             dcerpc_binding_handle
 507  *
 508  * @return              NT_STATUS_OK on success, a corresponding NT status if an
 509  *                      error occured.
 510  *
 511  * @code
 512  *   struct dcerpc_binding_handle *winreg_binding;
 513  *   NTSTATUS status;
 514  *
 515  *   status = rpcint_binding_handle(tmp_ctx,
 516  *                                  &ndr_table_winreg,
 517  *                                  p->client_id,
 518  *                                  p->session_info,
 519  *                                  p->msg_ctx
 520  *                                  &winreg_binding);
 521  * @endcode
 522  */
 523 NTSTATUS rpcint_binding_handle(TALLOC_CTX *mem_ctx,
 524                                const struct ndr_interface_table *ndr_table,
 525                                struct client_address *client_id,
 526                                const struct auth_serversupplied_info *session_info,
 527                                struct messaging_context *msg_ctx,
 528                                struct dcerpc_binding_handle **binding_handle)
 529 {
 530         return rpcint_binding_handle_ex(mem_ctx, NULL, ndr_table, client_id,
 531                                         session_info, msg_ctx, binding_handle);
 532 }
 533
 534 /**
 535  * @internal
 536  *
 537  * @brief Create a new RPC client context which uses a local transport.
 538  *
 539  * This creates a local transport. It is a shortcut to directly call the server
 540  * functions and avoid marshalling.
 541  * NOTE: this function should be used only by rpc_pipe_open_interface()
 542  *
 543  * @param[in]  mem_ctx  The memory context to use.
 544  *
 545  * @param[in]  abstract_syntax Normally the syntax_id of the autogenerated
 546  *                             ndr_table_<name>.
 547  *
 548  * @param[in]  serversupplied_info The server supplied authentication function.
 549  *
 550  * @param[in]  client_id The client address information.
 551  *
 552  * @param[in]  msg_ctx  The messaging context to use.
 553  *
 554  * @param[out] presult  A pointer to store the connected rpc client pipe.
 555  *
 556  * @return              NT_STATUS_OK on success, a corresponding NT status if an
 557  *                      error occured.
 558  */
 559 static NTSTATUS rpc_pipe_open_internal(TALLOC_CTX *mem_ctx,
 560                                 const struct ndr_syntax_id *abstract_syntax,
 561                                 const struct auth_serversupplied_info *serversupplied_info,
 562                                 struct client_address *client_id,
 563                                 struct messaging_context *msg_ctx,
 564                                 struct rpc_pipe_client **presult)
 565 {
 566         struct rpc_pipe_client *result;
 567         NTSTATUS status;
 568
 569         result = TALLOC_ZERO_P(mem_ctx, struct rpc_pipe_client);
 570         if (result == NULL) {
 571                 return NT_STATUS_NO_MEMORY;
 572         }
 573
 574         result->abstract_syntax = *abstract_syntax;
 575         result->transfer_syntax = ndr_transfer_syntax;
 576
 577         if (client_id == NULL) {
 578                 static struct client_address unknown;
 579                 strlcpy(unknown.addr, "<UNKNOWN>", sizeof(unknown.addr));
 580                 unknown.name = "<UNKNOWN>";
 581                 client_id = &unknown;
 582         }
 583
 584         result->max_xmit_frag = -1;
 585         result->max_recv_frag = -1;
 586
 587         status = rpcint_binding_handle_ex(result,
 588                                           abstract_syntax,
 589                                           NULL,
 590                                           client_id,
 591                                           serversupplied_info,
 592                                           msg_ctx,
 593                                           &result->binding_handle);
 594         if (!NT_STATUS_IS_OK(status)) {
 595                 TALLOC_FREE(result);
 596                 return status;
 597         }
 598
 599         *presult = result;
 600         return NT_STATUS_OK;
 601 }
 602
 603 /****************************************************************************
 604  * External pipes functions
 605  ***************************************************************************/
 606
 607
 608 struct np_proxy_state *make_external_rpc_pipe_p(TALLOC_CTX *mem_ctx,
 609                                 const char *pipe_name,
 610                                 const struct tsocket_address *local_address,
 611                                 const struct tsocket_address *remote_address,
 612                                 const struct auth_serversupplied_info *session_info)
 613 {
 614         struct np_proxy_state *result;
 615         char *socket_np_dir;
 616         const char *socket_dir;
 617         struct tevent_context *ev;
 618         struct tevent_req *subreq;
 619         struct auth_session_info_transport *session_info_t;
 620         struct auth_session_info *session_info_npa;
 621         struct auth_user_info_dc *user_info_dc;
 622         union netr_Validation val;
 623         NTSTATUS status;
 624         bool ok;
 625         int ret;
 626         int sys_errno;
 627
 628         result = talloc(mem_ctx, struct np_proxy_state);
 629         if (result == NULL) {
 630                 DEBUG(0, ("talloc failed\n"));
 631                 return NULL;
 632         }
 633
 634         result->read_queue = tevent_queue_create(result, "np_read");
 635         if (result->read_queue == NULL) {
 636                 DEBUG(0, ("tevent_queue_create failed\n"));
 637                 goto fail;
 638         }
 639
 640         result->write_queue = tevent_queue_create(result, "np_write");
 641         if (result->write_queue == NULL) {
 642                 DEBUG(0, ("tevent_queue_create failed\n"));
 643                 goto fail;
 644         }
 645
 646         ev = s3_tevent_context_init(talloc_tos());
 647         if (ev == NULL) {
 648                 DEBUG(0, ("s3_tevent_context_init failed\n"));
 649                 goto fail;
 650         }
 651
 652         socket_dir = lp_parm_const_string(
 653                 GLOBAL_SECTION_SNUM, "external_rpc_pipe", "socket_dir",
 654                 lp_ncalrpc_dir());
 655         if (socket_dir == NULL) {
 656                 DEBUG(0, ("externan_rpc_pipe:socket_dir not set\n"));
 657                 goto fail;
 658         }
 659         socket_np_dir = talloc_asprintf(talloc_tos(), "%s/np", socket_dir);
 660         if (socket_np_dir == NULL) {
 661                 DEBUG(0, ("talloc_asprintf failed\n"));
 662                 goto fail;
 663         }
 664
 665         session_info_npa = talloc_zero(talloc_tos(), struct auth_session_info);
 666         if (session_info_npa == NULL) {
 667                 DEBUG(0, ("talloc failed\n"));
 668                 goto fail;
 669         }
 670
 671         /* Send the named_pipe_auth server the user's full token */
 672         session_info_npa->security_token = session_info->security_token;
 673         session_info_npa->session_key = session_info->session_key;
 674
 675         val.sam3 = session_info->info3;
 676
 677         /* Convert into something we can build a struct
 678          * auth_session_info from.  Most of the work here
 679          * will be to convert the SIDS, which we will then ignore, but
 680          * this is the easier way to handle it */
 681         status = make_user_info_dc_netlogon_validation(talloc_tos(), "", 3, &val, &user_info_dc);
 682         if (!NT_STATUS_IS_OK(status)) {
 683                 DEBUG(0, ("conversion of info3 into user_info_dc failed!\n"));
 684                 goto fail;
 685         }
 686
 687         session_info_npa->info = talloc_move(session_info_npa, &user_info_dc->info);
 688         talloc_free(user_info_dc);
 689
 690         session_info_t = talloc_zero(talloc_tos(), struct auth_session_info_transport);
 691         if (session_info_npa == NULL) {
 692                 DEBUG(0, ("talloc failed\n"));
 693                 goto fail;
 694         }
 695
 696         session_info_t->session_info = talloc_steal(session_info_t, session_info_npa);
 697
 698         become_root();
 699         subreq = tstream_npa_connect_send(talloc_tos(), ev,
 700                                           socket_np_dir,
 701                                           pipe_name,
 702                                           remote_address, /* client_addr */
 703                                           NULL, /* client_name */
 704                                           local_address, /* server_addr */
 705                                           NULL, /* server_name */
 706                                           session_info_t);
 707         if (subreq == NULL) {
 708                 unbecome_root();
 709                 DEBUG(0, ("tstream_npa_connect_send to %s for pipe %s and "
 710                           "user %s\\%s failed\n",
 711                           socket_np_dir, pipe_name, session_info_t->session_info->info->domain_name,
 712                           session_info_t->session_info->info->account_name));
 713                 goto fail;
 714         }
 715         ok = tevent_req_poll(subreq, ev);
 716         unbecome_root();
 717         if (!ok) {
 718                 DEBUG(0, ("tevent_req_poll to %s for pipe %s and user %s\\%s "
 719                           "failed for tstream_npa_connect: %s\n",
 720                           socket_np_dir, pipe_name, session_info_t->session_info->info->domain_name,
 721                           session_info_t->session_info->info->account_name,
 722                           strerror(errno)));
 723                 goto fail;
 724
 725         }
 726         ret = tstream_npa_connect_recv(subreq, &sys_errno,
 727                                        result,
 728                                        &result->npipe,
 729                                        &result->file_type,
 730                                        &result->device_state,
 731                                        &result->allocation_size);
 732         TALLOC_FREE(subreq);
 733         if (ret != 0) {
 734                 DEBUG(0, ("tstream_npa_connect_recv  to %s for pipe %s and "
 735                           "user %s\\%s failed: %s\n",
 736                           socket_np_dir, pipe_name, session_info_t->session_info->info->domain_name,
 737                           session_info_t->session_info->info->account_name,
 738                           strerror(sys_errno)));
 739                 goto fail;
 740         }
 741
 742         return result;
 743
 744  fail:
 745         TALLOC_FREE(result);
 746         return NULL;
 747 }
 748
 749 static NTSTATUS rpc_pipe_open_external(TALLOC_CTX *mem_ctx,
 750                                 const char *pipe_name,
 751                                 const struct ndr_syntax_id *abstract_syntax,
 752                                 const struct auth_serversupplied_info *session_info,
 753                                 struct rpc_pipe_client **_result)
 754 {
 755         struct tsocket_address *local, *remote;
 756         struct rpc_pipe_client *result = NULL;
 757         struct np_proxy_state *proxy_state = NULL;
 758         struct pipe_auth_data *auth;
 759         NTSTATUS status;
 760         int ret;
 761
 762         /* this is an internal connection, fake up ip addresses */
 763         ret = tsocket_address_inet_from_strings(talloc_tos(), "ip",
 764                                                 NULL, 0, &local);
 765         if (ret) {
 766                 return NT_STATUS_NO_MEMORY;
 767         }
 768         ret = tsocket_address_inet_from_strings(talloc_tos(), "ip",
 769                                                 NULL, 0, &remote);
 770         if (ret) {
 771                 return NT_STATUS_NO_MEMORY;
 772         }
 773
 774         proxy_state = make_external_rpc_pipe_p(mem_ctx, pipe_name,
 775                                                 local, remote, session_info);
 776         if (!proxy_state) {
 777                 return NT_STATUS_UNSUCCESSFUL;
 778         }
 779
 780         result = talloc_zero(mem_ctx, struct rpc_pipe_client);
 781         if (result == NULL) {
 782                 status = NT_STATUS_NO_MEMORY;
 783                 goto done;
 784         }
 785
 786         result->abstract_syntax = *abstract_syntax;
 787         result->transfer_syntax = ndr_transfer_syntax;
 788
 789         result->desthost = get_myname(result);
 790         result->srv_name_slash = talloc_asprintf_strupper_m(
 791                 result, "\\\\%s", result->desthost);
 792         if ((result->desthost == NULL) || (result->srv_name_slash == NULL)) {
 793                 status = NT_STATUS_NO_MEMORY;
 794                 goto done;
 795         }
 796
 797         result->max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
 798         result->max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
 799
 800         status = rpc_transport_tstream_init(result,
 801                                             &proxy_state->npipe,
 802                                             &result->transport);
 803         if (!NT_STATUS_IS_OK(status)) {
 804                 goto done;
 805         }
 806
 807         result->binding_handle = rpccli_bh_create(result);
 808         if (result->binding_handle == NULL) {
 809                 status = NT_STATUS_NO_MEMORY;
 810                 DEBUG(0, ("Failed to create binding handle.\n"));
 811                 goto done;
 812         }
 813
 814         result->auth = talloc_zero(result, struct pipe_auth_data);
 815         if (!result->auth) {
 816                 status = NT_STATUS_NO_MEMORY;
 817                 goto done;
 818         }
 819         result->auth->auth_type = DCERPC_AUTH_TYPE_NONE;
 820         result->auth->auth_level = DCERPC_AUTH_LEVEL_NONE;
 821
 822         status = rpccli_anon_bind_data(result, &auth);
 823         if (!NT_STATUS_IS_OK(status)) {
 824                 DEBUG(0, ("Failed to initialize anonymous bind.\n"));
 825                 goto done;
 826         }
 827
 828         status = rpc_pipe_bind(result, auth);
 829         if (!NT_STATUS_IS_OK(status)) {
 830                 DEBUG(0, ("Failed to bind external pipe.\n"));
 831                 goto done;
 832         }
 833
 834 done:
 835         if (!NT_STATUS_IS_OK(status)) {
 836                 TALLOC_FREE(result);
 837         }
 838         TALLOC_FREE(proxy_state);
 839         *_result = result;
 840         return status;
 841 }
 842
 843 /**
 844  * @brief Create a new RPC client context which uses a local dispatch function
 845  *        or a remote transport, depending on rpc_server configuration for the
 846  *        specific service.
 847  *
 848  * @param[in]  mem_ctx  The memory context to use.
 849  *
 850  * @param[in]  abstract_syntax Normally the syntax_id of the autogenerated
 851  *                             ndr_table_<name>.
 852  *
 853  * @param[in]  serversupplied_info The server supplied authentication function.
 854  *
 855  * @param[in]  client_id The client address information.
 856  *
 857  * @param[in]  msg_ctx  The messaging context to use.
 858  *
 859  * @param[out] presult  A pointer to store the connected rpc client pipe.
 860  *
 861  * @return              NT_STATUS_OK on success, a corresponding NT status if an
 862  *                      error occured.
 863  *
 864  * @code
 865  *   struct rpc_pipe_client *winreg_pipe;
 866  *   NTSTATUS status;
 867  *
 868  *   status = rpc_pipe_open_interface(tmp_ctx,
 869  *                                    &ndr_table_winreg.syntax_id,
 870  *                                    p->session_info,
 871  *                                    client_id,
 872  *                                    &winreg_pipe);
 873  * @endcode
 874  */
 875
 876 NTSTATUS rpc_pipe_open_interface(TALLOC_CTX *mem_ctx,
 877                                  const struct ndr_syntax_id *syntax,
 878                                  const struct auth_serversupplied_info *session_info,
 879                                  struct client_address *client_id,
 880                                  struct messaging_context *msg_ctx,
 881                                  struct rpc_pipe_client **cli_pipe)
 882 {
 883         struct rpc_pipe_client *cli = NULL;
 884         const char *server_type;
 885         const char *pipe_name;
 886         NTSTATUS status;
 887         TALLOC_CTX *tmp_ctx;
 888
 889         if (cli_pipe && rpccli_is_connected(*cli_pipe)) {
 890                 return NT_STATUS_OK;
 891         } else {
 892                 TALLOC_FREE(*cli_pipe);
 893         }
 894
 895         tmp_ctx = talloc_stackframe();
 896         if (tmp_ctx == NULL) {
 897                 return NT_STATUS_NO_MEMORY;
 898         }
 899
 900         pipe_name = get_pipe_name_from_syntax(tmp_ctx, syntax);
 901         if (pipe_name == NULL) {
 902                 status = NT_STATUS_INVALID_PARAMETER;
 903                 goto done;
 904         }
 905
 906         while (pipe_name[0] == '\\') {
 907                 pipe_name++;
 908         }
 909
 910         DEBUG(5, ("Connecting to %s pipe.\n", pipe_name));
 911
 912         server_type = lp_parm_const_string(GLOBAL_SECTION_SNUM,
 913                                            "rpc_server", pipe_name,
 914                                            "embedded");
 915
 916         if (strcasecmp_m(server_type, "embedded") == 0) {
 917                 status = rpc_pipe_open_internal(tmp_ctx,
 918                                                 syntax, session_info,
 919                                                 client_id, msg_ctx,
 920                                                 &cli);
 921                 if (!NT_STATUS_IS_OK(status)) {
 922                         goto done;
 923                 }
 924         } else if (strcasecmp_m(server_type, "daemon") == 0 ||
 925                    strcasecmp_m(server_type, "external") == 0) {
 926                 /* It would be nice to just use rpc_pipe_open_ncalrpc() but
 927                  * for now we need to use the special proxy setup to connect
 928                  * to spoolssd. */
 929
 930                 status = rpc_pipe_open_external(tmp_ctx,
 931                                                 pipe_name, syntax,
 932                                                 session_info,
 933                                                 &cli);
 934                 if (!NT_STATUS_IS_OK(status)) {
 935                         goto done;
 936                 }
 937         } else {
 938                 status = NT_STATUS_NOT_IMPLEMENTED;
 939                 DEBUG(0, ("Wrong servertype specified in config file: %s",
 940                           nt_errstr(status)));
 941                 goto done;
 942         }
 943
 944         status = NT_STATUS_OK;
 945 done:
 946         if (NT_STATUS_IS_OK(status)) {
 947                 *cli_pipe = talloc_move(mem_ctx, &cli);
 948         }
 949         TALLOC_FREE(tmp_ctx);
 950         return status;
 951 }