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 #include "librpc/ndr/ndr_table.h"
  40 #include "rpc_server/rpc_server.h"
  41
  42 #undef DBGC_CLASS
  43 #define DBGC_CLASS DBGC_RPC_SRV
  44
  45 static struct npa_state *npa_state_init(TALLOC_CTX *mem_ctx)
  46 {
  47         struct npa_state *npa;
  48
  49         npa = talloc_zero(mem_ctx, struct npa_state);
  50         if (npa == NULL) {
  51                 return NULL;
  52         }
  53
  54         npa->read_queue = tevent_queue_create(npa, "npa_cli_read");
  55         if (npa->read_queue == NULL) {
  56                 DEBUG(0, ("tevent_queue_create failed\n"));
  57                 goto fail;
  58         }
  59
  60         npa->write_queue = tevent_queue_create(npa, "npa_cli_write");
  61         if (npa->write_queue == NULL) {
  62                 DEBUG(0, ("tevent_queue_create failed\n"));
  63                 goto fail;
  64         }
  65
  66         return npa;
  67 fail:
  68         talloc_free(npa);
  69         return NULL;
  70 }
  71
  72 NTSTATUS make_internal_rpc_pipe_socketpair(TALLOC_CTX *mem_ctx,
  73                                            struct tevent_context *ev_ctx,
  74                                            struct messaging_context *msg_ctx,
  75                                            const char *pipe_name,
  76                                            const struct ndr_syntax_id *syntax,
  77                                            const struct tsocket_address *remote_address,
  78                                            const struct auth_session_info *session_info,
  79                                            struct npa_state **pnpa)
  80 {
  81         TALLOC_CTX *tmp_ctx = talloc_stackframe();
  82         struct named_pipe_client *npc;
  83         struct tevent_req *subreq;
  84         struct npa_state *npa;
  85         NTSTATUS status;
  86         int error;
  87         int rc;
  88
  89         DEBUG(4, ("Create of internal pipe %s requested\n", pipe_name));
  90
  91         npa = npa_state_init(tmp_ctx);
  92         if (npa == NULL) {
  93                 status = NT_STATUS_NO_MEMORY;
  94                 goto out;
  95         }
  96
  97         npa->file_type = FILE_TYPE_MESSAGE_MODE_PIPE;
  98         npa->device_state = 0xff | 0x0400 | 0x0100;
  99         npa->allocation_size = 4096;
 100
 101         npc = named_pipe_client_init(npa,
 102                                      ev_ctx,
 103                                      msg_ctx,
 104                                      pipe_name,
 105                                      NULL, /* term_fn */
 106                                      npa->file_type,
 107                                      npa->device_state,
 108                                      npa->allocation_size,
 109                                      NULL); /* private_data */
 110         if (npc == NULL) {
 111                 status = NT_STATUS_NO_MEMORY;
 112                 goto out;
 113         }
 114         npa->private_data = (void*) npc;
 115
 116         rc = tstream_npa_socketpair(npa->file_type,
 117                                     npa,
 118                                     &npa->stream,
 119                                     npc,
 120                                     &npc->tstream);
 121         if (rc == -1) {
 122                 status = map_nt_error_from_unix(errno);
 123                 goto out;
 124         }
 125
 126         npc->client = tsocket_address_copy(remote_address, npc);
 127         if (npc->client == NULL) {
 128                 status = NT_STATUS_NO_MEMORY;
 129                 goto out;
 130         }
 131
 132         npc->client_name = tsocket_address_inet_addr_string(npc->client, npc);
 133         if (npc->client_name == NULL) {
 134                 status = NT_STATUS_NO_MEMORY;
 135                 goto out;
 136         }
 137
 138         npc->session_info = copy_session_info(npc, session_info);
 139         if (npc->session_info == NULL) {
 140                 status = NT_STATUS_NO_MEMORY;
 141                 goto out;
 142         }
 143
 144         rc = make_server_pipes_struct(npc,
 145                                       npc->msg_ctx,
 146                                       npc->pipe_name,
 147                                       NCACN_NP,
 148                                       false,
 149                                       npc->server,
 150                                       npc->client,
 151                                       npc->session_info,
 152                                       &npc->p,
 153                                       &error);
 154         if (rc == -1) {
 155                 status = map_nt_error_from_unix(error);
 156                 goto out;
 157         }
 158
 159         npc->write_queue = tevent_queue_create(npc, "npa_server_write_queue");
 160         if (npc->write_queue == NULL) {
 161                 status = NT_STATUS_NO_MEMORY;
 162                 goto out;
 163         }
 164
 165         subreq = dcerpc_read_ncacn_packet_send(npc, npc->ev, npc->tstream);
 166         if (subreq == NULL) {
 167                 DEBUG(2, ("Failed to start receving packets\n"));
 168                 status = NT_STATUS_PIPE_BROKEN;
 169                 goto out;
 170         }
 171         tevent_req_set_callback(subreq, named_pipe_packet_process, npc);
 172
 173         *pnpa = talloc_steal(mem_ctx, npa);
 174         status = NT_STATUS_OK;
 175 out:
 176         talloc_free(tmp_ctx);
 177         return status;
 178 }
 179
 180 /****************************************************************************
 181  Make an internal namedpipes structure
 182 ****************************************************************************/
 183
 184 struct pipes_struct *make_internal_rpc_pipe_p(TALLOC_CTX *mem_ctx,
 185                                               const struct ndr_syntax_id *syntax,
 186                                               const struct tsocket_address *remote_address,
 187                                               const struct auth_session_info *session_info,
 188                                               struct messaging_context *msg_ctx)
 189 {
 190         struct pipes_struct *p;
 191         struct pipe_rpc_fns *context_fns;
 192         const char *pipe_name;
 193         int ret;
 194         const struct ndr_interface_table *table;
 195
 196         table = ndr_table_by_uuid(&syntax->uuid);
 197         if (table == NULL) {
 198                 DEBUG(0,("unknown interface\n"));
 199                 return NULL;
 200         }
 201
 202         pipe_name = dcerpc_default_transport_endpoint(mem_ctx, NCACN_NP, table);
 203
 204         DEBUG(4,("Create pipe requested %s\n", pipe_name));
 205
 206         ret = make_base_pipes_struct(mem_ctx, msg_ctx, pipe_name,
 207                                      NCALRPC, RPC_LITTLE_ENDIAN, false,
 208                                      remote_address, NULL, &p);
 209         if (ret) {
 210                 DEBUG(0,("ERROR! no memory for pipes_struct!\n"));
 211                 return NULL;
 212         }
 213
 214         if (!init_pipe_handles(p, syntax)) {
 215                 DEBUG(0,("open_rpc_pipe_p: init_pipe_handles failed.\n"));
 216                 TALLOC_FREE(p);
 217                 return NULL;
 218         }
 219
 220         p->session_info = copy_session_info(p, session_info);
 221         if (p->session_info == NULL) {
 222                 DEBUG(0, ("open_rpc_pipe_p: copy_serverinfo failed\n"));
 223                 close_policy_by_pipe(p);
 224                 TALLOC_FREE(p);
 225                 return NULL;
 226         }
 227
 228         context_fns = talloc(p, struct pipe_rpc_fns);
 229         if (context_fns == NULL) {
 230                 DEBUG(0,("talloc() failed!\n"));
 231                 TALLOC_FREE(p);
 232                 return NULL;
 233         }
 234
 235         context_fns->next = context_fns->prev = NULL;
 236         context_fns->n_cmds = rpc_srv_get_pipe_num_cmds(syntax);
 237         context_fns->cmds = rpc_srv_get_pipe_cmds(syntax);
 238         context_fns->context_id = 0;
 239         context_fns->syntax = *syntax;
 240
 241         /* add to the list of open contexts */
 242         DLIST_ADD(p->contexts, context_fns);
 243
 244         DEBUG(4,("Created internal pipe %s\n", pipe_name));
 245
 246         return p;
 247 }
 248
 249 static NTSTATUS rpcint_dispatch(struct pipes_struct *p,
 250                                 TALLOC_CTX *mem_ctx,
 251                                 uint32_t opnum,
 252                                 const DATA_BLOB *in_data,
 253                                 DATA_BLOB *out_data)
 254 {
 255         struct pipe_rpc_fns *fns = find_pipe_fns_by_context(p->contexts, 0);
 256         uint32_t num_cmds = fns->n_cmds;
 257         const struct api_struct *cmds = fns->cmds;
 258         uint32_t i;
 259         bool ok;
 260
 261         /* set opnum */
 262         p->opnum = opnum;
 263
 264         for (i = 0; i < num_cmds; i++) {
 265                 if (cmds[i].opnum == opnum && cmds[i].fn != NULL) {
 266                         break;
 267                 }
 268         }
 269
 270         if (i == num_cmds) {
 271                 return NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE;
 272         }
 273
 274         p->in_data.data = *in_data;
 275         p->out_data.rdata = data_blob_null;
 276
 277         ok = cmds[i].fn(p);
 278         p->in_data.data = data_blob_null;
 279         if (!ok) {
 280                 data_blob_free(&p->out_data.rdata);
 281                 talloc_free_children(p->mem_ctx);
 282                 return NT_STATUS_RPC_CALL_FAILED;
 283         }
 284
 285         if (p->fault_state) {
 286                 NTSTATUS status;
 287
 288                 status = NT_STATUS(p->fault_state);
 289                 p->fault_state = 0;
 290                 data_blob_free(&p->out_data.rdata);
 291                 talloc_free_children(p->mem_ctx);
 292                 return status;
 293         }
 294
 295         *out_data = p->out_data.rdata;
 296         talloc_steal(mem_ctx, out_data->data);
 297         p->out_data.rdata = data_blob_null;
 298
 299         talloc_free_children(p->mem_ctx);
 300         return NT_STATUS_OK;
 301 }
 302
 303 struct rpcint_bh_state {
 304         struct pipes_struct *p;
 305 };
 306
 307 static bool rpcint_bh_is_connected(struct dcerpc_binding_handle *h)
 308 {
 309         struct rpcint_bh_state *hs = dcerpc_binding_handle_data(h,
 310                                      struct rpcint_bh_state);
 311
 312         if (!hs->p) {
 313                 return false;
 314         }
 315
 316         return true;
 317 }
 318
 319 static uint32_t rpcint_bh_set_timeout(struct dcerpc_binding_handle *h,
 320                                       uint32_t timeout)
 321 {
 322         /* TODO: implement timeouts */
 323         return UINT32_MAX;
 324 }
 325
 326 struct rpcint_bh_raw_call_state {
 327         DATA_BLOB in_data;
 328         DATA_BLOB out_data;
 329         uint32_t out_flags;
 330 };
 331
 332 static struct tevent_req *rpcint_bh_raw_call_send(TALLOC_CTX *mem_ctx,
 333                                                   struct tevent_context *ev,
 334                                                   struct dcerpc_binding_handle *h,
 335                                                   const struct GUID *object,
 336                                                   uint32_t opnum,
 337                                                   uint32_t in_flags,
 338                                                   const uint8_t *in_data,
 339                                                   size_t in_length)
 340 {
 341         struct rpcint_bh_state *hs =
 342                 dcerpc_binding_handle_data(h,
 343                 struct rpcint_bh_state);
 344         struct tevent_req *req;
 345         struct rpcint_bh_raw_call_state *state;
 346         bool ok;
 347         NTSTATUS status;
 348
 349         req = tevent_req_create(mem_ctx, &state,
 350                                 struct rpcint_bh_raw_call_state);
 351         if (req == NULL) {
 352                 return NULL;
 353         }
 354         state->in_data.data = discard_const_p(uint8_t, in_data);
 355         state->in_data.length = in_length;
 356
 357         ok = rpcint_bh_is_connected(h);
 358         if (!ok) {
 359                 tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED);
 360                 return tevent_req_post(req, ev);
 361         }
 362
 363         /* TODO: allow async */
 364         status = rpcint_dispatch(hs->p, state, opnum,
 365                                  &state->in_data,
 366                                  &state->out_data);
 367         if (!NT_STATUS_IS_OK(status)) {
 368                 tevent_req_nterror(req, status);
 369                 return tevent_req_post(req, ev);
 370         }
 371
 372         tevent_req_done(req);
 373         return tevent_req_post(req, ev);
 374 }
 375
 376 static NTSTATUS rpcint_bh_raw_call_recv(struct tevent_req *req,
 377                                         TALLOC_CTX *mem_ctx,
 378                                         uint8_t **out_data,
 379                                         size_t *out_length,
 380                                         uint32_t *out_flags)
 381 {
 382         struct rpcint_bh_raw_call_state *state =
 383                 tevent_req_data(req,
 384                 struct rpcint_bh_raw_call_state);
 385         NTSTATUS status;
 386
 387         if (tevent_req_is_nterror(req, &status)) {
 388                 tevent_req_received(req);
 389                 return status;
 390         }
 391
 392         *out_data = talloc_move(mem_ctx, &state->out_data.data);
 393         *out_length = state->out_data.length;
 394         *out_flags = 0;
 395         tevent_req_received(req);
 396         return NT_STATUS_OK;
 397 }
 398
 399 struct rpcint_bh_disconnect_state {
 400         uint8_t _dummy;
 401 };
 402
 403 static struct tevent_req *rpcint_bh_disconnect_send(TALLOC_CTX *mem_ctx,
 404                                                 struct tevent_context *ev,
 405                                                 struct dcerpc_binding_handle *h)
 406 {
 407         struct rpcint_bh_state *hs = dcerpc_binding_handle_data(h,
 408                                      struct rpcint_bh_state);
 409         struct tevent_req *req;
 410         struct rpcint_bh_disconnect_state *state;
 411         bool ok;
 412
 413         req = tevent_req_create(mem_ctx, &state,
 414                                 struct rpcint_bh_disconnect_state);
 415         if (req == NULL) {
 416                 return NULL;
 417         }
 418
 419         ok = rpcint_bh_is_connected(h);
 420         if (!ok) {
 421                 tevent_req_nterror(req, NT_STATUS_CONNECTION_DISCONNECTED);
 422                 return tevent_req_post(req, ev);
 423         }
 424
 425         /*
 426          * TODO: do a real async disconnect ...
 427          *
 428          * For now the caller needs to free pipes_struct
 429          */
 430         hs->p = NULL;
 431
 432         tevent_req_done(req);
 433         return tevent_req_post(req, ev);
 434 }
 435
 436 static NTSTATUS rpcint_bh_disconnect_recv(struct tevent_req *req)
 437 {
 438         NTSTATUS status;
 439
 440         if (tevent_req_is_nterror(req, &status)) {
 441                 tevent_req_received(req);
 442                 return status;
 443         }
 444
 445         tevent_req_received(req);
 446         return NT_STATUS_OK;
 447 }
 448
 449 static bool rpcint_bh_ref_alloc(struct dcerpc_binding_handle *h)
 450 {
 451         return true;
 452 }
 453
 454 static void rpcint_bh_do_ndr_print(struct dcerpc_binding_handle *h,
 455                                    int ndr_flags,
 456                                    const void *_struct_ptr,
 457                                    const struct ndr_interface_call *call)
 458 {
 459         void *struct_ptr = discard_const(_struct_ptr);
 460
 461         if (DEBUGLEVEL < 11) {
 462                 return;
 463         }
 464
 465         if (ndr_flags & NDR_IN) {
 466                 ndr_print_function_debug(call->ndr_print,
 467                                          call->name,
 468                                          ndr_flags,
 469                                          struct_ptr);
 470         }
 471         if (ndr_flags & NDR_OUT) {
 472                 ndr_print_function_debug(call->ndr_print,
 473                                          call->name,
 474                                          ndr_flags,
 475                                          struct_ptr);
 476         }
 477 }
 478
 479 static const struct dcerpc_binding_handle_ops rpcint_bh_ops = {
 480         .name                   = "rpcint",
 481         .is_connected           = rpcint_bh_is_connected,
 482         .set_timeout            = rpcint_bh_set_timeout,
 483         .raw_call_send          = rpcint_bh_raw_call_send,
 484         .raw_call_recv          = rpcint_bh_raw_call_recv,
 485         .disconnect_send        = rpcint_bh_disconnect_send,
 486         .disconnect_recv        = rpcint_bh_disconnect_recv,
 487
 488         .ref_alloc              = rpcint_bh_ref_alloc,
 489         .do_ndr_print           = rpcint_bh_do_ndr_print,
 490 };
 491
 492 static NTSTATUS rpcint_binding_handle_ex(TALLOC_CTX *mem_ctx,
 493                         const struct ndr_syntax_id *abstract_syntax,
 494                         const struct ndr_interface_table *ndr_table,
 495                         const struct tsocket_address *remote_address,
 496                         const struct auth_session_info *session_info,
 497                         struct messaging_context *msg_ctx,
 498                         struct dcerpc_binding_handle **binding_handle)
 499 {
 500         struct dcerpc_binding_handle *h;
 501         struct rpcint_bh_state *hs;
 502
 503         if (ndr_table) {
 504                 abstract_syntax = &ndr_table->syntax_id;
 505         }
 506
 507         h = dcerpc_binding_handle_create(mem_ctx,
 508                                          &rpcint_bh_ops,
 509                                          NULL,
 510                                          ndr_table,
 511                                          &hs,
 512                                          struct rpcint_bh_state,
 513                                          __location__);
 514         if (h == NULL) {
 515                 return NT_STATUS_NO_MEMORY;
 516         }
 517         hs->p = make_internal_rpc_pipe_p(hs,
 518                                          abstract_syntax,
 519                                          remote_address,
 520                                          session_info,
 521                                          msg_ctx);
 522         if (hs->p == NULL) {
 523                 TALLOC_FREE(h);
 524                 return NT_STATUS_NO_MEMORY;
 525         }
 526
 527         *binding_handle = h;
 528         return NT_STATUS_OK;
 529 }
 530 /**
 531  * @brief Create a new DCERPC Binding Handle which uses a local dispatch function.
 532  *
 533  * @param[in]  mem_ctx  The memory context to use.
 534  *
 535  * @param[in]  ndr_table Normally the ndr_table_<name>.
 536  *
 537  * @param[in]  remote_address The info about the connected client.
 538  *
 539  * @param[in]  serversupplied_info The server supplied authentication function.
 540  *
 541  * @param[in]  msg_ctx   The messaging context that can be used by the server
 542  *
 543  * @param[out] binding_handle  A pointer to store the connected
 544  *                             dcerpc_binding_handle
 545  *
 546  * @return              NT_STATUS_OK on success, a corresponding NT status if an
 547  *                      error occured.
 548  *
 549  * @code
 550  *   struct dcerpc_binding_handle *winreg_binding;
 551  *   NTSTATUS status;
 552  *
 553  *   status = rpcint_binding_handle(tmp_ctx,
 554  *                                  &ndr_table_winreg,
 555  *                                  p->remote_address,
 556  *                                  p->session_info,
 557  *                                  p->msg_ctx
 558  *                                  &winreg_binding);
 559  * @endcode
 560  */
 561 NTSTATUS rpcint_binding_handle(TALLOC_CTX *mem_ctx,
 562                                const struct ndr_interface_table *ndr_table,
 563                                const struct tsocket_address *remote_address,
 564                                const struct auth_session_info *session_info,
 565                                struct messaging_context *msg_ctx,
 566                                struct dcerpc_binding_handle **binding_handle)
 567 {
 568         return rpcint_binding_handle_ex(mem_ctx, NULL, ndr_table, remote_address,
 569                                         session_info, msg_ctx, binding_handle);
 570 }
 571
 572 /**
 573  * @internal
 574  *
 575  * @brief Create a new RPC client context which uses a local transport.
 576  *
 577  * This creates a local transport. It is a shortcut to directly call the server
 578  * functions and avoid marshalling.
 579  * NOTE: this function should be used only by rpc_pipe_open_interface()
 580  *
 581  * @param[in]  mem_ctx  The memory context to use.
 582  *
 583  * @param[in]  abstract_syntax Normally the syntax_id of the autogenerated
 584  *                             ndr_table_<name>.
 585  *
 586  * @param[in]  serversupplied_info The server supplied authentication function.
 587  *
 588  * @param[in]  remote_address The client address information.
 589  *
 590  * @param[in]  msg_ctx  The messaging context to use.
 591  *
 592  * @param[out] presult  A pointer to store the connected rpc client pipe.
 593  *
 594  * @return              NT_STATUS_OK on success, a corresponding NT status if an
 595  *                      error occured.
 596  */
 597 NTSTATUS rpc_pipe_open_internal(TALLOC_CTX *mem_ctx,
 598                                 const struct ndr_syntax_id *abstract_syntax,
 599                                 const struct auth_session_info *session_info,
 600                                 const struct tsocket_address *remote_address,
 601                                 struct messaging_context *msg_ctx,
 602                                 struct rpc_pipe_client **presult)
 603 {
 604         struct rpc_pipe_client *result;
 605         NTSTATUS status;
 606
 607         result = talloc_zero(mem_ctx, struct rpc_pipe_client);
 608         if (result == NULL) {
 609                 return NT_STATUS_NO_MEMORY;
 610         }
 611
 612         result->abstract_syntax = *abstract_syntax;
 613         result->transfer_syntax = ndr_transfer_syntax_ndr;
 614
 615         if (remote_address == NULL) {
 616                 struct tsocket_address *local;
 617                 int rc;
 618
 619                 rc = tsocket_address_inet_from_strings(mem_ctx,
 620                                                        "ip",
 621                                                        "127.0.0.1",
 622                                                        0,
 623                                                        &local);
 624                 if (rc < 0) {
 625                         TALLOC_FREE(result);
 626                         return NT_STATUS_NO_MEMORY;
 627                 }
 628
 629                 remote_address = local;
 630         }
 631
 632         result->max_xmit_frag = -1;
 633         result->max_recv_frag = -1;
 634
 635         status = rpcint_binding_handle_ex(result,
 636                                           abstract_syntax,
 637                                           NULL,
 638                                           remote_address,
 639                                           session_info,
 640                                           msg_ctx,
 641                                           &result->binding_handle);
 642         if (!NT_STATUS_IS_OK(status)) {
 643                 TALLOC_FREE(result);
 644                 return status;
 645         }
 646
 647         *presult = result;
 648         return NT_STATUS_OK;
 649 }
 650
 651 /****************************************************************************
 652  * External pipes functions
 653  ***************************************************************************/
 654
 655 NTSTATUS make_external_rpc_pipe(TALLOC_CTX *mem_ctx,
 656                                 const char *pipe_name,
 657                                 const struct tsocket_address *local_address,
 658                                 const struct tsocket_address *remote_address,
 659                                 const struct auth_session_info *session_info,
 660                                 struct npa_state **pnpa)
 661 {
 662         TALLOC_CTX *tmp_ctx = talloc_stackframe();
 663         struct auth_session_info_transport *session_info_t;
 664         struct tevent_context *ev_ctx;
 665         struct tevent_req *subreq;
 666         const char *socket_np_dir;
 667         const char *socket_dir;
 668         struct npa_state *npa;
 669         int sys_errno;
 670         NTSTATUS status;
 671         int rc = -1;
 672         bool ok;
 673
 674         npa = npa_state_init(tmp_ctx);
 675         if (npa == NULL) {
 676                 status = NT_STATUS_NO_MEMORY;
 677                 goto out;
 678         }
 679
 680         socket_dir = lp_parm_const_string(GLOBAL_SECTION_SNUM,
 681                                           "external_rpc_pipe",
 682                                           "socket_dir",
 683                                           lp_ncalrpc_dir());
 684         if (socket_dir == NULL) {
 685                 DEBUG(0, ("external_rpc_pipe: socket_dir not set\n"));
 686                 status = NT_STATUS_PIPE_NOT_AVAILABLE;
 687                 goto out;
 688         }
 689
 690         socket_np_dir = talloc_asprintf(tmp_ctx, "%s/np", socket_dir);
 691         if (socket_np_dir == NULL) {
 692                 DEBUG(0, ("talloc_asprintf failed\n"));
 693                 status = NT_STATUS_NO_MEMORY;
 694                 goto out;
 695         }
 696
 697         session_info_t = talloc_zero(tmp_ctx,
 698                                      struct auth_session_info_transport);
 699         if (session_info_t == NULL) {
 700                 DEBUG(0, ("talloc failed\n"));
 701                 status = NT_STATUS_NO_MEMORY;
 702                 goto out;
 703         }
 704
 705         session_info_t->session_info = copy_session_info(session_info_t,
 706                                                          session_info);
 707         if (session_info_t->session_info == NULL) {
 708                 DEBUG(0, ("copy_session_info failed\n"));
 709                 status = NT_STATUS_NO_MEMORY;
 710                 goto out;
 711         }
 712
 713         ev_ctx = s3_tevent_context_init(tmp_ctx);
 714         if (ev_ctx == NULL) {
 715                 DEBUG(0, ("s3_tevent_context_init failed\n"));
 716                 status = NT_STATUS_NO_MEMORY;
 717                 goto out;
 718         }
 719
 720         become_root();
 721         subreq = tstream_npa_connect_send(tmp_ctx,
 722                                           ev_ctx,
 723                                           socket_np_dir,
 724                                           pipe_name,
 725                                           remote_address, /* client_addr */
 726                                           NULL, /* client_name */
 727                                           local_address, /* server_addr */
 728                                           NULL, /* server_name */
 729                                           session_info_t);
 730         if (subreq == NULL) {
 731                 unbecome_root();
 732                 DEBUG(0, ("tstream_npa_connect_send to %s for pipe %s and "
 733                           "user %s\\%s failed\n",
 734                           socket_np_dir, pipe_name, session_info_t->session_info->info->domain_name,
 735                           session_info_t->session_info->info->account_name));
 736                 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
 737                 goto out;
 738         }
 739         ok = tevent_req_poll(subreq, ev_ctx);
 740         unbecome_root();
 741         if (!ok) {
 742                 DEBUG(0, ("tevent_req_poll to %s for pipe %s and user %s\\%s "
 743                           "failed for tstream_npa_connect: %s\n",
 744                           socket_np_dir,
 745                           pipe_name,
 746                           session_info_t->session_info->info->domain_name,
 747                           session_info_t->session_info->info->account_name,
 748                           strerror(errno)));
 749                 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
 750                 goto out;
 751         }
 752
 753         rc = tstream_npa_connect_recv(subreq,
 754                                       &sys_errno,
 755                                       npa,
 756                                       &npa->stream,
 757                                       &npa->file_type,
 758                                       &npa->device_state,
 759                                       &npa->allocation_size);
 760         talloc_free(subreq);
 761         if (rc != 0) {
 762                 int l = 1;
 763
 764                 if (errno == ENOENT) {
 765                         l = 2;
 766                 }
 767
 768                 DEBUG(l, ("tstream_npa_connect_recv  to %s for pipe %s and "
 769                           "user %s\\%s failed: %s\n",
 770                           socket_np_dir,
 771                           pipe_name,
 772                           session_info_t->session_info->info->domain_name,
 773                           session_info_t->session_info->info->account_name,
 774                           strerror(sys_errno)));
 775                 status = NT_STATUS_OBJECT_NAME_NOT_FOUND;
 776                 goto out;
 777         }
 778
 779         *pnpa = talloc_steal(mem_ctx, npa);
 780         status = NT_STATUS_OK;
 781 out:
 782         talloc_free(tmp_ctx);
 783
 784         return status;
 785 }
 786
 787 struct np_proxy_state *make_external_rpc_pipe_p(TALLOC_CTX *mem_ctx,
 788                                 const char *pipe_name,
 789                                 const struct tsocket_address *local_address,
 790                                 const struct tsocket_address *remote_address,
 791                                 const struct auth_session_info *session_info)
 792 {
 793         struct np_proxy_state *result;
 794         char *socket_np_dir;
 795         const char *socket_dir;
 796         struct tevent_context *ev;
 797         struct tevent_req *subreq;
 798         struct auth_session_info_transport *session_info_t;
 799         bool ok;
 800         int ret;
 801         int sys_errno;
 802
 803         result = talloc(mem_ctx, struct np_proxy_state);
 804         if (result == NULL) {
 805                 DEBUG(0, ("talloc failed\n"));
 806                 return NULL;
 807         }
 808
 809         result->read_queue = tevent_queue_create(result, "np_read");
 810         if (result->read_queue == NULL) {
 811                 DEBUG(0, ("tevent_queue_create failed\n"));
 812                 goto fail;
 813         }
 814
 815         result->write_queue = tevent_queue_create(result, "np_write");
 816         if (result->write_queue == NULL) {
 817                 DEBUG(0, ("tevent_queue_create failed\n"));
 818                 goto fail;
 819         }
 820
 821         ev = s3_tevent_context_init(talloc_tos());
 822         if (ev == NULL) {
 823                 DEBUG(0, ("s3_tevent_context_init failed\n"));
 824                 goto fail;
 825         }
 826
 827         socket_dir = lp_parm_const_string(
 828                 GLOBAL_SECTION_SNUM, "external_rpc_pipe", "socket_dir",
 829                 lp_ncalrpc_dir());
 830         if (socket_dir == NULL) {
 831                 DEBUG(0, ("external_rpc_pipe:socket_dir not set\n"));
 832                 goto fail;
 833         }
 834         socket_np_dir = talloc_asprintf(talloc_tos(), "%s/np", socket_dir);
 835         if (socket_np_dir == NULL) {
 836                 DEBUG(0, ("talloc_asprintf failed\n"));
 837                 goto fail;
 838         }
 839
 840         session_info_t = talloc_zero(talloc_tos(), struct auth_session_info_transport);
 841         if (session_info_t == NULL) {
 842                 DEBUG(0, ("talloc failed\n"));
 843                 goto fail;
 844         }
 845
 846         session_info_t->session_info = copy_session_info(session_info_t,
 847                                                          session_info);
 848         if (session_info_t->session_info == NULL) {
 849                 DEBUG(0, ("copy_session_info failed\n"));
 850                 goto fail;
 851         }
 852
 853         become_root();
 854         subreq = tstream_npa_connect_send(talloc_tos(), ev,
 855                                           socket_np_dir,
 856                                           pipe_name,
 857                                           remote_address, /* client_addr */
 858                                           NULL, /* client_name */
 859                                           local_address, /* server_addr */
 860                                           NULL, /* server_name */
 861                                           session_info_t);
 862         if (subreq == NULL) {
 863                 unbecome_root();
 864                 DEBUG(0, ("tstream_npa_connect_send to %s for pipe %s and "
 865                           "user %s\\%s failed\n",
 866                           socket_np_dir, pipe_name, session_info_t->session_info->info->domain_name,
 867                           session_info_t->session_info->info->account_name));
 868                 goto fail;
 869         }
 870         ok = tevent_req_poll(subreq, ev);
 871         unbecome_root();
 872         if (!ok) {
 873                 DEBUG(0, ("tevent_req_poll to %s for pipe %s and user %s\\%s "
 874                           "failed for tstream_npa_connect: %s\n",
 875                           socket_np_dir, pipe_name, session_info_t->session_info->info->domain_name,
 876                           session_info_t->session_info->info->account_name,
 877                           strerror(errno)));
 878                 goto fail;
 879
 880         }
 881         ret = tstream_npa_connect_recv(subreq, &sys_errno,
 882                                        result,
 883                                        &result->npipe,
 884                                        &result->file_type,
 885                                        &result->device_state,
 886                                        &result->allocation_size);
 887         TALLOC_FREE(subreq);
 888         if (ret != 0) {
 889                 int l = 1;
 890                 if (errno == ENOENT) {
 891                         l = 2;
 892                 }
 893                 DEBUG(l, ("tstream_npa_connect_recv  to %s for pipe %s and "
 894                           "user %s\\%s failed: %s\n",
 895                           socket_np_dir, pipe_name, session_info_t->session_info->info->domain_name,
 896                           session_info_t->session_info->info->account_name,
 897                           strerror(sys_errno)));
 898                 goto fail;
 899         }
 900
 901         return result;
 902
 903  fail:
 904         TALLOC_FREE(result);
 905         return NULL;
 906 }
 907
 908 static NTSTATUS rpc_pipe_open_external(TALLOC_CTX *mem_ctx,
 909                                 const char *pipe_name,
 910                                 const struct ndr_interface_table *table,
 911                                 const struct auth_session_info *session_info,
 912                                 struct rpc_pipe_client **_result)
 913 {
 914         struct tsocket_address *local, *remote;
 915         struct rpc_pipe_client *result = NULL;
 916         struct np_proxy_state *proxy_state = NULL;
 917         struct pipe_auth_data *auth;
 918         NTSTATUS status;
 919         int ret;
 920
 921         /* this is an internal connection, fake up ip addresses */
 922         ret = tsocket_address_inet_from_strings(talloc_tos(), "ip",
 923                                                 NULL, 0, &local);
 924         if (ret) {
 925                 return NT_STATUS_NO_MEMORY;
 926         }
 927         ret = tsocket_address_inet_from_strings(talloc_tos(), "ip",
 928                                                 NULL, 0, &remote);
 929         if (ret) {
 930                 return NT_STATUS_NO_MEMORY;
 931         }
 932
 933         proxy_state = make_external_rpc_pipe_p(mem_ctx, pipe_name,
 934                                                 local, remote, session_info);
 935         if (!proxy_state) {
 936                 return NT_STATUS_UNSUCCESSFUL;
 937         }
 938
 939         result = talloc_zero(mem_ctx, struct rpc_pipe_client);
 940         if (result == NULL) {
 941                 status = NT_STATUS_NO_MEMORY;
 942                 goto done;
 943         }
 944
 945         result->abstract_syntax = table->syntax_id;
 946         result->transfer_syntax = ndr_transfer_syntax_ndr;
 947
 948         result->desthost = get_myname(result);
 949         result->srv_name_slash = talloc_asprintf_strupper_m(
 950                 result, "\\\\%s", result->desthost);
 951         if ((result->desthost == NULL) || (result->srv_name_slash == NULL)) {
 952                 status = NT_STATUS_NO_MEMORY;
 953                 goto done;
 954         }
 955
 956         result->max_xmit_frag = RPC_MAX_PDU_FRAG_LEN;
 957         result->max_recv_frag = RPC_MAX_PDU_FRAG_LEN;
 958
 959         status = rpc_transport_tstream_init(result,
 960                                             &proxy_state->npipe,
 961                                             &result->transport);
 962         if (!NT_STATUS_IS_OK(status)) {
 963                 goto done;
 964         }
 965
 966         result->binding_handle = rpccli_bh_create(result, NULL, table);
 967         if (result->binding_handle == NULL) {
 968                 status = NT_STATUS_NO_MEMORY;
 969                 DEBUG(0, ("Failed to create binding handle.\n"));
 970                 goto done;
 971         }
 972
 973         result->auth = talloc_zero(result, struct pipe_auth_data);
 974         if (!result->auth) {
 975                 status = NT_STATUS_NO_MEMORY;
 976                 goto done;
 977         }
 978         result->auth->auth_type = DCERPC_AUTH_TYPE_NONE;
 979         result->auth->auth_level = DCERPC_AUTH_LEVEL_NONE;
 980
 981         status = rpccli_anon_bind_data(result, &auth);
 982         if (!NT_STATUS_IS_OK(status)) {
 983                 DEBUG(0, ("Failed to initialize anonymous bind.\n"));
 984                 goto done;
 985         }
 986
 987         status = rpc_pipe_bind(result, auth);
 988         if (!NT_STATUS_IS_OK(status)) {
 989                 DEBUG(0, ("Failed to bind external pipe.\n"));
 990                 goto done;
 991         }
 992
 993 done:
 994         if (!NT_STATUS_IS_OK(status)) {
 995                 TALLOC_FREE(result);
 996         }
 997         TALLOC_FREE(proxy_state);
 998         *_result = result;
 999         return status;
1000 }
1001
1002 /**
1003  * @brief Create a new RPC client context which uses a local dispatch function
1004  *        or a remote transport, depending on rpc_server configuration for the
1005  *        specific service.
1006  *
1007  * @param[in]  mem_ctx  The memory context to use.
1008  *
1009  * @param[in]  abstract_syntax Normally the syntax_id of the autogenerated
1010  *                             ndr_table_<name>.
1011  *
1012  * @param[in]  serversupplied_info The server supplied authentication function.
1013  *
1014  * @param[in]  remote_address The client address information.
1015  *
1016  * @param[in]  msg_ctx  The messaging context to use.
1017  *
1018  * @param[out] presult  A pointer to store the connected rpc client pipe.
1019  *
1020  * @return              NT_STATUS_OK on success, a corresponding NT status if an
1021  *                      error occured.
1022  *
1023  * @code
1024  *   struct rpc_pipe_client *winreg_pipe;
1025  *   NTSTATUS status;
1026  *
1027  *   status = rpc_pipe_open_interface(tmp_ctx,
1028  *                                    &ndr_table_winreg.syntax_id,
1029  *                                    p->session_info,
1030  *                                    remote_address,
1031  *                                    &winreg_pipe);
1032  * @endcode
1033  */
1034
1035 NTSTATUS rpc_pipe_open_interface(TALLOC_CTX *mem_ctx,
1036                                  const struct ndr_interface_table *table,
1037                                  const struct auth_session_info *session_info,
1038                                  const struct tsocket_address *remote_address,
1039                                  struct messaging_context *msg_ctx,
1040                                  struct rpc_pipe_client **cli_pipe)
1041 {
1042         struct rpc_pipe_client *cli = NULL;
1043         enum rpc_service_mode_e pipe_mode;
1044         const char *pipe_name;
1045         NTSTATUS status;
1046         TALLOC_CTX *tmp_ctx;
1047
1048         if (cli_pipe != NULL) {
1049                 if (rpccli_is_connected(*cli_pipe)) {
1050                         return NT_STATUS_OK;
1051                 } else {
1052                         TALLOC_FREE(*cli_pipe);
1053                 }
1054         }
1055
1056         tmp_ctx = talloc_stackframe();
1057         if (tmp_ctx == NULL) {
1058                 return NT_STATUS_NO_MEMORY;
1059         }
1060
1061         pipe_name = dcerpc_default_transport_endpoint(mem_ctx, NCACN_NP, table);
1062         if (pipe_name == NULL) {
1063                 status = NT_STATUS_INVALID_PARAMETER;
1064                 goto done;
1065         }
1066
1067         while (pipe_name[0] == '\\') {
1068                 pipe_name++;
1069         }
1070
1071         DEBUG(5, ("Connecting to %s pipe.\n", pipe_name));
1072
1073         pipe_mode = rpc_service_mode(pipe_name);
1074
1075         switch (pipe_mode) {
1076         case RPC_SERVICE_MODE_EMBEDDED:
1077                 status = rpc_pipe_open_internal(tmp_ctx,
1078                                                 &table->syntax_id, session_info,
1079                                                 remote_address, msg_ctx,
1080                                                 &cli);
1081                 if (!NT_STATUS_IS_OK(status)) {
1082                         goto done;
1083                 }
1084                 break;
1085         case RPC_SERVICE_MODE_EXTERNAL:
1086                 /* It would be nice to just use rpc_pipe_open_ncalrpc() but
1087                  * for now we need to use the special proxy setup to connect
1088                  * to spoolssd. */
1089
1090                 status = rpc_pipe_open_external(tmp_ctx,
1091                                                 pipe_name, table,
1092                                                 session_info,
1093                                                 &cli);
1094                 if (!NT_STATUS_IS_OK(status)) {
1095                         goto done;
1096                 }
1097                 break;
1098         case RPC_SERVICE_MODE_DISABLED:
1099                 status = NT_STATUS_NOT_IMPLEMENTED;
1100                 DEBUG(0, ("Service pipe %s is disabled in config file: %s",
1101                           pipe_name, nt_errstr(status)));
1102                 goto done;
1103         }
1104
1105         status = NT_STATUS_OK;
1106 done:
1107         if (NT_STATUS_IS_OK(status) && cli_pipe != NULL) {
1108                 *cli_pipe = talloc_move(mem_ctx, &cli);
1109         }
1110         TALLOC_FREE(tmp_ctx);
1111         return status;
1112 }