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  *  Copyright (C) Andrew Bartlett               2011
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 3 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  22  */
  23
  24 #include "includes.h"
  25 #include "rpc_client/cli_pipe.h"
  26 #include "rpc_server/srv_pipe_internal.h"
  27 #include "rpc_dce.h"
  28 #include "../libcli/named_pipe_auth/npa_tstream.h"
  29 #include "rpc_server/rpc_ncacn_np.h"
  30 #include "librpc/gen_ndr/netlogon.h"
  31 #include "librpc/gen_ndr/auth.h"
  32 #include "../auth/auth_sam_reply.h"
  33 #include "auth.h"
  34 #include "rpc_server/rpc_pipes.h"
  35 #include "../lib/tsocket/tsocket.h"
  36 #include "../lib/util/tevent_ntstatus.h"
  37 #include "rpc_contexts.h"
  38 #include "rpc_server/rpc_config.h"
  39
  40 #undef DBGC_CLASS
  41 #define DBGC_CLASS DBGC_RPC_SRV
  42
  43 /****************************************************************************
  44  Make an internal namedpipes structure
  45 ****************************************************************************/
  46
  47 struct pipes_struct *make_internal_rpc_pipe_p(TALLOC_CTX *mem_ctx,
  48                                               const struct ndr_syntax_id *syntax,
  49                                               const struct tsocket_address *remote_address,
  50                                               const struct auth_session_info *session_info,
  51                                               struct messaging_context *msg_ctx)
  52 {
  53         struct pipes_struct *p;
  54         struct pipe_rpc_fns *context_fns;
  55         const char *pipe_name;
  56         int ret;
  57
  58         pipe_name = get_pipe_name_from_syntax(talloc_tos(), syntax);
  59
  60         DEBUG(4,("Create pipe requested %s\n", pipe_name));
  61
  62         ret = make_base_pipes_struct(mem_ctx, msg_ctx, pipe_name,
  63                                      NCALRPC, RPC_LITTLE_ENDIAN, false,
  64                                      remote_address, NULL, &p);
  65         if (ret) {
  66                 DEBUG(0,("ERROR! no memory for pipes_struct!\n"));
  67                 return NULL;
  68         }
  69
  70         if (!init_pipe_handles(p, syntax)) {
  71                 DEBUG(0,("open_rpc_pipe_p: init_pipe_handles failed.\n"));
  72                 TALLOC_FREE(p);
  73                 return NULL;
  74         }
  75
  76         p->session_info = copy_session_info(p, session_info);
  77         if (p->session_info == NULL) {
  78                 DEBUG(0, ("open_rpc_pipe_p: copy_serverinfo failed\n"));
  79                 close_policy_by_pipe(p);
  80                 TALLOC_FREE(p);
  81                 return NULL;
  82         }
  83
  84         context_fns = talloc(p, struct pipe_rpc_fns);
  85         if (context_fns == NULL) {
  86                 DEBUG(0,("talloc() failed!\n"));
  87                 TALLOC_FREE(p);
  88                 return NULL;
  89         }
  90
  91         context_fns->next = context_fns->prev = NULL;
  92         context_fns->n_cmds = rpc_srv_get_pipe_num_cmds(syntax);
  93         context_fns->cmds = rpc_srv_get_pipe_cmds(syntax);
  94         context_fns->context_id = 0;
  95         context_fns->syntax = *syntax;
  96
  97         /* add to the list of open contexts */
  98         DLIST_ADD(p->contexts, context_fns);
  99
 100         DEBUG(4,("Created internal pipe %s\n", pipe_name));
 101
 102         return p;
 103 }
 104
 105 static NTSTATUS rpcint_dispatch(struct pipes_struct *p,
 106                                 TALLOC_CTX *mem_ctx,
 107                                 uint32_t opnum,
 108                                 const DATA_BLOB *in_data,
 109                                 DATA_BLOB *out_data)
 110 {
 111         struct pipe_rpc_fns *fns = find_pipe_fns_by_context(p->contexts, 0);
 112         uint32_t num_cmds = fns->n_cmds;
 113         const struct api_struct *cmds = fns->cmds;
 114         uint32_t i;
 115         bool ok;
 116
 117         /* set opnum */
 118         p->opnum = opnum;
 119
 120         for (i = 0; i < num_cmds; i++) {
 121                 if (cmds[i].opnum == opnum && cmds[i].fn != NULL) {
 122                         break;
 123                 }
 124         }
 125
 126         if (i == num_cmds) {
 127                 return NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE;
 128         }
 129
 130         p->in_data.data = *in_data;
 131         p->out_data.rdata = data_blob_null;
 132
 133         ok = cmds[i].fn(p);
 134         p->in_data.data = data_blob_null;
 135         if (!ok) {
 136                 data_blob_free(&p->out_data.rdata);
 137                 talloc_free_children(p->mem_ctx);
 138                 return NT_STATUS_RPC_CALL_FAILED;
 139         }
 140
 141         if (p->fault_state) {
 142                 p->fault_state = false;
 143                 data_blob_free(&p->out_data.rdata);
 144                 talloc_free_children(p->mem_ctx);
 145                 return NT_STATUS_RPC_CALL_FAILED;
 146         }
 147
 148         if (p->bad_handle_fault_state) {
 149                 p->bad_handle_fault_state = false;
 150                 data_blob_free(&p->out_data.rdata);
 151                 talloc_free_children(p->mem_ctx);
 152                 return NT_STATUS_RPC_SS_CONTEXT_MISMATCH;
 153         }
 154
 155         if (p->rng_fault_state) {
 156                 p->rng_fault_state = false;
 157                 data_blob_free(&p->out_data.rdata);
 158                 talloc_free_children(p->mem_ctx);
 159                 return NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE;
 160         }
 161
 162         *out_data = p->out_data.rdata;
 163         talloc_steal(mem_ctx, out_data->data);
 164         p->out_data.rdata = data_blob_null;
 165
 166         talloc_free_children(p->mem_ctx);
 167         return NT_STATUS_OK;
 168 }
 169
 170 struct rpcint_bh_state {
 171         struct pipes_struct *p;
 172 };
 173
 174 static bool rpcint_bh_is_connected(struct dcerpc_binding_handle *h)
 175 {
 176         struct rpcint_bh_state *hs = dcerpc_binding_handle_data(h,
 177                                      struct rpcint_bh_state);
 178
 179         if (!hs->p) {
 180                 return false;
 181         }
 182
 183         return true;
 184 }
 185
 186 static uint32_t rpcint_bh_set_timeout(struct dcerpc_binding_handle *h,
 187                                       uint32_t timeout)
 188 {
 189         /* TODO: implement timeouts */
 190         return UINT32_MAX;
 191 }
 192
 193 struct rpcint_bh_raw_call_state {
 194         DATA_BLOB in_data;
 195         DATA_BLOB out_data;
 196         uint32_t out_flags;
 197 };
 198
 199 static struct tevent_req *rpcint_bh_raw_call_send(TALLOC_CTX *mem_ctx,
 200                                                   struct tevent_context *ev,
 201                                                   struct dcerpc_binding_handle *h,
 202                                                   const struct GUID *object,
 203                                                   uint32_t opnum,
 204                                                   uint32_t in_flags,
 205                                                   const uint8_t *in_data,
 206                                                   size_t in_length)
 207 {
 208         struct rpcint_bh_state *hs =
 209                 dcerpc_binding_handle_data(h,
 210                 struct rpcint_bh_state);
 211         struct tevent_req *req;
 212         struct rpcint_bh_raw_call_state *state;
 213         bool ok;
 214         NTSTATUS status;
 215
 216         req = tevent_req_create(mem_ctx, &state,
 217                                 struct rpcint_bh_raw_call_state);
 218         if (req == NULL) {
 219                 return NULL;
 220         }
 221         state->in_data.data = discard_const_p(uint8_t, in_data);
 222         state->in_data.length = in_length;
 223
 224         ok = rpcint_bh_is_connected(h);
 225         if (!ok) {
 226                 tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED);
 227                 return tevent_req_post(req, ev);
 228         }
 229
 230         /* TODO: allow async */
 231         status = rpcint_dispatch(hs->p, state, opnum,
 232                                  &state->in_data,
 233                                  &state->out_data);
 234         if (!NT_STATUS_IS_OK(status)) {
 235                 tevent_req_nterror(req, status);
 236                 return tevent_req_post(req, ev);
 237         }
 238
 239         tevent_req_done(req);
 240         return tevent_req_post(req, ev);
 241 }
 242
 243 static NTSTATUS rpcint_bh_raw_call_recv(struct tevent_req *req,
 244                                         TALLOC_CTX *mem_ctx,
 245                                         uint8_t **out_data,
 246                                         size_t *out_length,
 247                                         uint32_t *out_flags)
 248 {
 249         struct rpcint_bh_raw_call_state *state =
 250                 tevent_req_data(req,
 251                 struct rpcint_bh_raw_call_state);
 252         NTSTATUS status;
 253
 254         if (tevent_req_is_nterror(req, &status)) {
 255                 tevent_req_received(req);
 256                 return status;
 257         }
 258
 259         *out_data = talloc_move(mem_ctx, &state->out_data.data);
 260         *out_length = state->out_data.length;
 261         *out_flags = 0;
 262         tevent_req_received(req);
 263         return NT_STATUS_OK;
 264 }
 265
 266 struct rpcint_bh_disconnect_state {
 267         uint8_t _dummy;
 268 };
 269
 270 static struct tevent_req *rpcint_bh_disconnect_send(TALLOC_CTX *mem_ctx,
 271                                                 struct tevent_context *ev,
 272                                                 struct dcerpc_binding_handle *h)
 273 {
 274         struct rpcint_bh_state *hs = dcerpc_binding_handle_data(h,
 275                                      struct rpcint_bh_state);
 276         struct tevent_req *req;
 277         struct rpcint_bh_disconnect_state *state;
 278         bool ok;
 279
 280         req = tevent_req_create(mem_ctx, &state,
 281                                 struct rpcint_bh_disconnect_state);
 282         if (req == NULL) {
 283                 return NULL;
 284         }
 285
 286         ok = rpcint_bh_is_connected(h);
 287         if (!ok) {
 288                 tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED);
 289                 return tevent_req_post(req, ev);
 290         }
 291
 292         /*
 293          * TODO: do a real async disconnect ...
 294          *
 295          * For now the caller needs to free pipes_struct
 296          */
 297         hs->p = NULL;
 298
 299         tevent_req_done(req);
 300         return tevent_req_post(req, ev);
 301 }
 302
 303 static NTSTATUS rpcint_bh_disconnect_recv(struct tevent_req *req)
 304 {
 305         NTSTATUS status;
 306
 307         if (tevent_req_is_nterror(req, &status)) {
 308                 tevent_req_received(req);
 309                 return status;
 310         }
 311
 312         tevent_req_received(req);
 313         return NT_STATUS_OK;
 314 }
 315
 316 static bool rpcint_bh_ref_alloc(struct dcerpc_binding_handle *h)
 317 {
 318         return true;
 319 }
 320
 321 static void rpcint_bh_do_ndr_print(struct dcerpc_binding_handle *h,
 322                                    int ndr_flags,
 323                                    const void *_struct_ptr,
 324                                    const struct ndr_interface_call *call)
 325 {
 326         void *struct_ptr = discard_const(_struct_ptr);
 327
 328         if (DEBUGLEVEL < 11) {
 329                 return;
 330         }
 331
 332         if (ndr_flags & NDR_IN) {
 333                 ndr_print_function_debug(call->ndr_print,
 334                                          call->name,
 335                                          ndr_flags,
 336                                          struct_ptr);
 337         }
 338         if (ndr_flags & NDR_OUT) {
 339                 ndr_print_function_debug(call->ndr_print,
 340                                          call->name,
 341                                          ndr_flags,
 342                                          struct_ptr);
 343         }
 344 }
 345
 346 static const struct dcerpc_binding_handle_ops rpcint_bh_ops = {
 347         .name                   = "rpcint",
 348         .is_connected           = rpcint_bh_is_connected,
 349         .set_timeout            = rpcint_bh_set_timeout,
 350         .raw_call_send          = rpcint_bh_raw_call_send,
 351         .raw_call_recv          = rpcint_bh_raw_call_recv,
 352         .disconnect_send        = rpcint_bh_disconnect_send,
 353         .disconnect_recv        = rpcint_bh_disconnect_recv,
 354
 355         .ref_alloc              = rpcint_bh_ref_alloc,
 356         .do_ndr_print           = rpcint_bh_do_ndr_print,
 357 };
 358
 359 static NTSTATUS rpcint_binding_handle_ex(TALLOC_CTX *mem_ctx,
 360                         const struct ndr_syntax_id *abstract_syntax,
 361                         const struct ndr_interface_table *ndr_table,
 362                         const struct tsocket_address *remote_address,
 363                         const struct auth_session_info *session_info,
 364                         struct messaging_context *msg_ctx,
 365                         struct dcerpc_binding_handle **binding_handle)
 366 {
 367         struct dcerpc_binding_handle *h;
 368         struct rpcint_bh_state *hs;
 369
 370         if (ndr_table) {
 371                 abstract_syntax = &ndr_table->syntax_id;
 372         }
 373
 374         h = dcerpc_binding_handle_create(mem_ctx,
 375                                          &rpcint_bh_ops,
 376                                          NULL,
 377                                          ndr_table,
 378                                          &hs,
 379                                          struct rpcint_bh_state,
 380                                          __location__);
 381         if (h == NULL) {
 382                 return NT_STATUS_NO_MEMORY;
 383         }
 384         hs->p = make_internal_rpc_pipe_p(hs,
 385                                          abstract_syntax,
 386                                          remote_address,
 387                                          session_info,
 388                                          msg_ctx);
 389         if (hs->p == NULL) {
 390                 TALLOC_FREE(h);
 391                 return NT_STATUS_NO_MEMORY;
 392         }
 393
 394         *binding_handle = h;
 395         return NT_STATUS_OK;
 396 }
 397 /**
 398  * @brief Create a new DCERPC Binding Handle which uses a local dispatch function.
 399  *
 400  * @param[in]  mem_ctx  The memory context to use.
 401  *
 402  * @param[in]  ndr_table Normally the ndr_table_<name>.
 403  *
 404  * @param[in]  remote_address The info about the connected client.
 405  *
 406  * @param[in]  serversupplied_info The server supplied authentication function.
 407  *
 408  * @param[in]  msg_ctx   The messaging context that can be used by the server
 409  *
 410  * @param[out] binding_handle  A pointer to store the connected
 411  *                             dcerpc_binding_handle
 412  *
 413  * @return              NT_STATUS_OK on success, a corresponding NT status if an
 414  *                      error occured.
 415  *
 416  * @code
 417  *   struct dcerpc_binding_handle *winreg_binding;
 418  *   NTSTATUS status;
 419  *
 420  *   status = rpcint_binding_handle(tmp_ctx,
 421  *                                  &ndr_table_winreg,
 422  *                                  p->remote_address,
 423  *                                  p->session_info,
 424  *                                  p->msg_ctx
 425  *                                  &winreg_binding);
 426  * @endcode
 427  */
 428 NTSTATUS rpcint_binding_handle(TALLOC_CTX *mem_ctx,
 429                                const struct ndr_interface_table *ndr_table,
 430                                const struct tsocket_address *remote_address,
 431                                const struct auth_session_info *session_info,
 432                                struct messaging_context *msg_ctx,
 433                                struct dcerpc_binding_handle **binding_handle)
 434 {
 435         return rpcint_binding_handle_ex(mem_ctx, NULL, ndr_table, remote_address,
 436                                         session_info, msg_ctx, binding_handle);
 437 }
 438
 439 /**
 440  * @internal
 441  *
 442  * @brief Create a new RPC client context which uses a local transport.
 443  *
 444  * This creates a local transport. It is a shortcut to directly call the server
 445  * functions and avoid marshalling.
 446  * NOTE: this function should be used only by rpc_pipe_open_interface()
 447  *
 448  * @param[in]  mem_ctx  The memory context to use.
 449  *
 450  * @param[in]  abstract_syntax Normally the syntax_id of the autogenerated
 451  *                             ndr_table_<name>.
 452  *
 453  * @param[in]  serversupplied_info The server supplied authentication function.
 454  *
 455  * @param[in]  remote_address The client address information.
 456  *
 457  * @param[in]  msg_ctx  The messaging context to use.
 458  *
 459  * @param[out] presult  A pointer to store the connected rpc client pipe.
 460  *
 461  * @return              NT_STATUS_OK on success, a corresponding NT status if an
 462  *                      error occured.
 463  */
 464 NTSTATUS rpc_pipe_open_internal(TALLOC_CTX *mem_ctx,
 465                                 const struct ndr_syntax_id *abstract_syntax,
 466                                 const struct auth_session_info *session_info,
 467                                 const struct tsocket_address *remote_address,
 468                                 struct messaging_context *msg_ctx,
 469                                 struct rpc_pipe_client **presult)
 470 {
 471         struct rpc_pipe_client *result;
 472         NTSTATUS status;
 473
 474         result = talloc_zero(mem_ctx, struct rpc_pipe_client);
 475         if (result == NULL) {
 476                 return NT_STATUS_NO_MEMORY;
 477         }
 478
 479         result->abstract_syntax = *abstract_syntax;
 480         result->transfer_syntax = ndr_transfer_syntax_ndr;
 481
 482         if (remote_address == NULL) {
 483                 struct tsocket_address *local;
 484                 int rc;
 485
 486                 rc = tsocket_address_inet_from_strings(mem_ctx,
 487                                                        "ip",
 488                                                        "127.0.0.1",
 489                                                        0,
 490                                                        &local);
 491                 if (rc < 0) {
 492                         TALLOC_FREE(result);
 493                         return NT_STATUS_NO_MEMORY;
 494                 }
 495
 496                 remote_address = local;
 497         }
 498
 499         result->max_xmit_frag = -1;
 500         result->max_recv_frag = -1;
 501
 502         status = rpcint_binding_handle_ex(result,
 503                                           abstract_syntax,
 504                                           NULL,
 505                                           remote_address,
 506                                           session_info,
 507                                           msg_ctx,
 508                                           &result->binding_handle);
 509         if (!NT_STATUS_IS_OK(status)) {
 510                 TALLOC_FREE(result);
 511                 return status;
 512         }
 513
 514         *presult = result;
 515         return NT_STATUS_OK;
 516 }
 517
 518 /****************************************************************************
 519  * External pipes functions
 520  ***************************************************************************/
 521
 522
 523 struct np_proxy_state *make_external_rpc_pipe_p(TALLOC_CTX *mem_ctx,
 524                                 const char *pipe_name,
 525                                 const struct tsocket_address *local_address,
 526                                 const struct tsocket_address *remote_address,
 527                                 const struct auth_session_info *session_info)
 528 {
 529         struct np_proxy_state *result;
 530         char *socket_np_dir;
 531         const char *socket_dir;
 532         struct tevent_context *ev;
 533         struct tevent_req *subreq;
 534         struct auth_session_info_transport *session_info_t;
 535         bool ok;
 536         int ret;
 537         int sys_errno;
 538
 539         result = talloc(mem_ctx, struct np_proxy_state);
 540         if (result == NULL) {
 541                 DEBUG(0, ("talloc failed\n"));
 542                 return NULL;
 543         }
 544
 545         result->read_queue = tevent_queue_create(result, "np_read");
 546         if (result->read_queue == NULL) {
 547                 DEBUG(0, ("tevent_queue_create failed\n"));
 548                 goto fail;
 549         }
 550
 551         result->write_queue = tevent_queue_create(result, "np_write");
 552         if (result->write_queue == NULL) {
 553                 DEBUG(0, ("tevent_queue_create failed\n"));
 554                 goto fail;
 555         }
 556
 557         ev = s3_tevent_context_init(talloc_tos());
 558         if (ev == NULL) {
 559                 DEBUG(0, ("s3_tevent_context_init failed\n"));
 560                 goto fail;
 561         }
 562
 563         socket_dir = lp_parm_const_string(
 564                 GLOBAL_SECTION_SNUM, "external_rpc_pipe", "socket_dir",
 565                 lp_ncalrpc_dir());
 566         if (socket_dir == NULL) {
 567                 DEBUG(0, ("externan_rpc_pipe:socket_dir not set\n"));
 568                 goto fail;
 569         }
 570         socket_np_dir = talloc_asprintf(talloc_tos(), "%s/np", socket_dir);
 571         if (socket_np_dir == NULL) {
 572                 DEBUG(0, ("talloc_asprintf failed\n"));
 573                 goto fail;
 574         }
 575
 576         session_info_t = talloc_zero(talloc_tos(), struct auth_session_info_transport);
 577         if (session_info_t == NULL) {
 578                 DEBUG(0, ("talloc failed\n"));
 579                 goto fail;
 580         }
 581
 582         session_info_t->session_info = copy_session_info(session_info_t,
 583                                                          session_info);
 584         if (session_info_t->session_info == NULL) {
 585                 DEBUG(0, ("copy_session_info failed\n"));
 586                 goto fail;
 587         }
 588
 589         become_root();
 590         subreq = tstream_npa_connect_send(talloc_tos(), ev,
 591                                           socket_np_dir,
 592                                           pipe_name,
 593                                           remote_address, /* client_addr */
 594                                           NULL, /* client_name */
 595                                           local_address, /* server_addr */
 596                                           NULL, /* server_name */
 597                                           session_info_t);
 598         if (subreq == NULL) {
 599                 unbecome_root();
 600                 DEBUG(0, ("tstream_npa_connect_send to %s for pipe %s and "
 601                           "user %s\\%s failed\n",
 602                           socket_np_dir, pipe_name, session_info_t->session_info->info->domain_name,
 603                           session_info_t->session_info->info->account_name));
 604                 goto fail;
 605         }
 606         ok = tevent_req_poll(subreq, ev);
 607         unbecome_root();
 608         if (!ok) {
 609                 DEBUG(0, ("tevent_req_poll to %s for pipe %s and user %s\\%s "
 610                           "failed for tstream_npa_connect: %s\n",
 611                           socket_np_dir, pipe_name, session_info_t->session_info->info->domain_name,
 612                           session_info_t->session_info->info->account_name,
 613                           strerror(errno)));
 614                 goto fail;
 615
 616         }
 617         ret = tstream_npa_connect_recv(subreq, &sys_errno,
 618                                        result,
 619                                        &result->npipe,
 620                                        &result->file_type,
 621                                        &result->device_state,
 622                                        &result->allocation_size);
 623         TALLOC_FREE(subreq);
 624         if (ret != 0) {
 625                 DEBUG(0, ("tstream_npa_connect_recv  to %s for pipe %s and "
 626                           "user %s\\%s failed: %s\n",
 627                           socket_np_dir, pipe_name, session_info_t->session_info->info->domain_name,
 628                           session_info_t->session_info->info->account_name,
 629                           strerror(sys_errno)));
 630                 goto fail;
 631         }
 632
 633         return result;
 634
 635  fail:
 636         TALLOC_FREE(result);
 637         return NULL;
 638 }
 639
 640 static NTSTATUS rpc_pipe_open_external(TALLOC_CTX *mem_ctx,
 641                                 const char *pipe_name,
 642                                 const struct ndr_syntax_id *abstract_syntax,
 643                                 const struct auth_session_info *session_info,
 644                                 struct rpc_pipe_client **_result)
 645 {
 646         struct tsocket_address *local, *remote;
 647         struct rpc_pipe_client *result = NULL;
 648         struct np_proxy_state *proxy_state = NULL;
 649         struct pipe_auth_data *auth;
 650         NTSTATUS status;
 651         int ret;
 652
 653         /* this is an internal connection, fake up ip addresses */
 654         ret = tsocket_address_inet_from_strings(talloc_tos(), "ip",
 655                                                 NULL, 0, &local);
 656         if (ret) {
 657                 return NT_STATUS_NO_MEMORY;
 658         }
 659         ret = tsocket_address_inet_from_strings(talloc_tos(), "ip",
 660                                                 NULL, 0, &remote);
 661         if (ret) {
 662                 return NT_STATUS_NO_MEMORY;
 663         }
 664
 665         proxy_state = make_external_rpc_pipe_p(mem_ctx, pipe_name,
 666                                                 local, remote, session_info);
 667         if (!proxy_state) {
 668                 return NT_STATUS_UNSUCCESSFUL;
 669         }
 670
 671         result = talloc_zero(mem_ctx, struct rpc_pipe_client);
 672         if (result == NULL) {
 673                 status = NT_STATUS_NO_MEMORY;
 674                 goto done;
 675         }
 676
 677         result->abstract_syntax = *abstract_syntax;
 678         result->transfer_syntax = ndr_transfer_syntax_ndr;
 679
 680         result->desthost = get_myname(result);
 681         result->srv_name_slash = talloc_asprintf_strupper_m(
 682                 result, "\\\\%s", result->desthost);
 683         if ((result->desthost == NULL) || (result->srv_name_slash == NULL)) {
 684                 status = NT_STATUS_NO_MEMORY;
 685                 goto done;
 686         }
 687
 688         result->max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
 689         result->max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
 690
 691         status = rpc_transport_tstream_init(result,
 692                                             &proxy_state->npipe,
 693                                             &result->transport);
 694         if (!NT_STATUS_IS_OK(status)) {
 695                 goto done;
 696         }
 697
 698         result->binding_handle = rpccli_bh_create(result);
 699         if (result->binding_handle == NULL) {
 700                 status = NT_STATUS_NO_MEMORY;
 701                 DEBUG(0, ("Failed to create binding handle.\n"));
 702                 goto done;
 703         }
 704
 705         result->auth = talloc_zero(result, struct pipe_auth_data);
 706         if (!result->auth) {
 707                 status = NT_STATUS_NO_MEMORY;
 708                 goto done;
 709         }
 710         result->auth->auth_type = DCERPC_AUTH_TYPE_NONE;
 711         result->auth->auth_level = DCERPC_AUTH_LEVEL_NONE;
 712
 713         status = rpccli_anon_bind_data(result, &auth);
 714         if (!NT_STATUS_IS_OK(status)) {
 715                 DEBUG(0, ("Failed to initialize anonymous bind.\n"));
 716                 goto done;
 717         }
 718
 719         status = rpc_pipe_bind(result, auth);
 720         if (!NT_STATUS_IS_OK(status)) {
 721                 DEBUG(0, ("Failed to bind external pipe.\n"));
 722                 goto done;
 723         }
 724
 725 done:
 726         if (!NT_STATUS_IS_OK(status)) {
 727                 TALLOC_FREE(result);
 728         }
 729         TALLOC_FREE(proxy_state);
 730         *_result = result;
 731         return status;
 732 }
 733
 734 /**
 735  * @brief Create a new RPC client context which uses a local dispatch function
 736  *        or a remote transport, depending on rpc_server configuration for the
 737  *        specific service.
 738  *
 739  * @param[in]  mem_ctx  The memory context to use.
 740  *
 741  * @param[in]  abstract_syntax Normally the syntax_id of the autogenerated
 742  *                             ndr_table_<name>.
 743  *
 744  * @param[in]  serversupplied_info The server supplied authentication function.
 745  *
 746  * @param[in]  remote_address The client address information.
 747  *
 748  * @param[in]  msg_ctx  The messaging context to use.
 749  *
 750  * @param[out] presult  A pointer to store the connected rpc client pipe.
 751  *
 752  * @return              NT_STATUS_OK on success, a corresponding NT status if an
 753  *                      error occured.
 754  *
 755  * @code
 756  *   struct rpc_pipe_client *winreg_pipe;
 757  *   NTSTATUS status;
 758  *
 759  *   status = rpc_pipe_open_interface(tmp_ctx,
 760  *                                    &ndr_table_winreg.syntax_id,
 761  *                                    p->session_info,
 762  *                                    remote_address,
 763  *                                    &winreg_pipe);
 764  * @endcode
 765  */
 766
 767 NTSTATUS rpc_pipe_open_interface(TALLOC_CTX *mem_ctx,
 768                                  const struct ndr_syntax_id *syntax,
 769                                  const struct auth_session_info *session_info,
 770                                  const struct tsocket_address *remote_address,
 771                                  struct messaging_context *msg_ctx,
 772                                  struct rpc_pipe_client **cli_pipe)
 773 {
 774         struct rpc_pipe_client *cli = NULL;
 775         enum rpc_service_mode_e pipe_mode;
 776         const char *pipe_name;
 777         NTSTATUS status;
 778         TALLOC_CTX *tmp_ctx;
 779
 780         if (cli_pipe && rpccli_is_connected(*cli_pipe)) {
 781                 return NT_STATUS_OK;
 782         } else {
 783                 TALLOC_FREE(*cli_pipe);
 784         }
 785
 786         tmp_ctx = talloc_stackframe();
 787         if (tmp_ctx == NULL) {
 788                 return NT_STATUS_NO_MEMORY;
 789         }
 790
 791         pipe_name = get_pipe_name_from_syntax(tmp_ctx, syntax);
 792         if (pipe_name == NULL) {
 793                 status = NT_STATUS_INVALID_PARAMETER;
 794                 goto done;
 795         }
 796
 797         while (pipe_name[0] == '\\') {
 798                 pipe_name++;
 799         }
 800
 801         DEBUG(5, ("Connecting to %s pipe.\n", pipe_name));
 802
 803         pipe_mode = rpc_service_mode(pipe_name);
 804
 805         switch (pipe_mode) {
 806         case RPC_SERVICE_MODE_EMBEDDED:
 807                 status = rpc_pipe_open_internal(tmp_ctx,
 808                                                 syntax, session_info,
 809                                                 remote_address, msg_ctx,
 810                                                 &cli);
 811                 if (!NT_STATUS_IS_OK(status)) {
 812                         goto done;
 813                 }
 814                 break;
 815         case RPC_SERVICE_MODE_EXTERNAL:
 816                 /* It would be nice to just use rpc_pipe_open_ncalrpc() but
 817                  * for now we need to use the special proxy setup to connect
 818                  * to spoolssd. */
 819
 820                 status = rpc_pipe_open_external(tmp_ctx,
 821                                                 pipe_name, syntax,
 822                                                 session_info,
 823                                                 &cli);
 824                 if (!NT_STATUS_IS_OK(status)) {
 825                         goto done;
 826                 }
 827                 break;
 828         case RPC_SERVICE_MODE_DISABLED:
 829                 status = NT_STATUS_NOT_IMPLEMENTED;
 830                 DEBUG(0, ("Service pipe %s is disabled in config file: %s",
 831                           pipe_name, nt_errstr(status)));
 832                 goto done;
 833         }
 834
 835         status = NT_STATUS_OK;
 836 done:
 837         if (NT_STATUS_IS_OK(status)) {
 838                 *cli_pipe = talloc_move(mem_ctx, &cli);
 839         }
 840         TALLOC_FREE(tmp_ctx);
 841         return status;
 842 }