source4/smbd/service_named_pipe.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    helper functions for NAMED PIPE servers
   5
   6    Copyright (C) Stefan (metze) Metzmacher      2008
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include <tevent.h>
  24 #include "smbd/service.h"
  25 #include "param/param.h"
  26 #include "auth/auth.h"
  27 #include "auth/session.h"
  28 #include "auth/auth_sam_reply.h"
  29 #include "lib/socket/socket.h"
  30 #include "lib/tsocket/tsocket.h"
  31 #include "libcli/util/tstream.h"
  32 #include "librpc/gen_ndr/ndr_named_pipe_auth.h"
  33 #include "system/passwd.h"
  34 #include "system/network.h"
  35 #include "libcli/raw/smb.h"
  36 #include "auth/credentials/credentials.h"
  37 #include "auth/credentials/credentials_krb5.h"
  38
  39 struct named_pipe_socket {
  40         const char *pipe_name;
  41         const char *pipe_path;
  42         const struct stream_server_ops *ops;
  43         void *private_data;
  44 };
  45
  46 struct named_pipe_connection {
  47         struct stream_connection *connection;
  48         const struct named_pipe_socket *pipe_sock;
  49         struct tstream_context *tstream;
  50 };
  51
  52 static void named_pipe_terminate_connection(struct named_pipe_connection *pipe_conn, const char *reason)
  53 {
  54         stream_terminate_connection(pipe_conn->connection, reason);
  55 }
  56
  57 static NTSTATUS named_pipe_full_request(void *private_data, DATA_BLOB blob, size_t *size)
  58 {
  59         if (blob.length < 8) {
  60                 return STATUS_MORE_ENTRIES;
  61         }
  62
  63         if (memcmp(NAMED_PIPE_AUTH_MAGIC, &blob.data[4], 4) != 0) {
  64                 DEBUG(0,("named_pipe_full_request: wrong protocol\n"));
  65                 *size = blob.length;
  66                 /* the error will be handled in named_pipe_recv_auth_request */
  67                 return NT_STATUS_OK;
  68         }
  69
  70         *size = 4 + RIVAL(blob.data, 0);
  71         if (*size > blob.length) {
  72                 return STATUS_MORE_ENTRIES;
  73         }
  74
  75         return NT_STATUS_OK;
  76 }
  77
  78 static void named_pipe_auth_request(struct tevent_req *subreq);
  79
  80 static void named_pipe_accept(struct stream_connection *conn)
  81 {
  82         struct named_pipe_socket *pipe_sock = talloc_get_type(conn->private_data,
  83                                                 struct named_pipe_socket);
  84         struct named_pipe_connection *pipe_conn;
  85         struct tevent_req *subreq;
  86         int rc, fd;
  87
  88         pipe_conn = talloc_zero(conn, struct named_pipe_connection);
  89         if (pipe_conn == NULL) {
  90                 stream_terminate_connection(conn,
  91                                 "named_pipe_accept: out of memory");
  92                 return;
  93         }
  94
  95         TALLOC_FREE(conn->event.fde);
  96
  97         /*
  98          * We have to duplicate the fd, cause it gets closed when the tstream
  99          * is freed and you shouldn't work a fd the tstream is based on.
 100          */
 101         fd = dup(socket_get_fd(conn->socket));
 102         if (fd == -1) {
 103                 char *reason;
 104
 105                 reason = talloc_asprintf(conn,
 106                                          "named_pipe_accept: failed to duplicate the file descriptor - %s",
 107                                          strerror(errno));
 108                 if (reason == NULL) {
 109                         reason = strerror(errno);
 110                 }
 111                 stream_terminate_connection(conn, reason);
 112         }
 113         rc = tstream_bsd_existing_socket(pipe_conn,
 114                                          fd,
 115                                          &pipe_conn->tstream);
 116         if (rc < 0) {
 117                 stream_terminate_connection(conn,
 118                                 "named_pipe_accept: out of memory");
 119                 return;
 120         }
 121
 122         pipe_conn->connection = conn;
 123         pipe_conn->pipe_sock = pipe_sock;
 124         conn->private_data = pipe_conn;
 125
 126         /*
 127          * The named pipe pdu's have the length as 8 byte (initial_read_size),
 128          * named_pipe_full_request provides the pdu length then.
 129          */
 130         subreq = tstream_read_pdu_blob_send(pipe_conn,
 131                                             pipe_conn->connection->event.ctx,
 132                                             pipe_conn->tstream,
 133                                             8, /* initial_read_size */
 134                                             named_pipe_full_request,
 135                                             pipe_conn);
 136         if (subreq == NULL) {
 137                 named_pipe_terminate_connection(pipe_conn,
 138                                 "named_pipe_accept: "
 139                                 "no memory for tstream_read_pdu_blob_send");
 140                 return;
 141         }
 142         tevent_req_set_callback(subreq, named_pipe_auth_request, pipe_conn);
 143 }
 144
 145 struct named_pipe_call {
 146         struct named_pipe_connection *pipe_conn;
 147         DATA_BLOB in;
 148         DATA_BLOB out;
 149         struct iovec out_iov[1];
 150         NTSTATUS status;
 151 };
 152
 153 static void named_pipe_handover_connection(struct tevent_req *subreq);
 154
 155 static void named_pipe_auth_request(struct tevent_req *subreq)
 156 {
 157         struct named_pipe_connection *pipe_conn = tevent_req_callback_data(subreq,
 158                                       struct named_pipe_connection);
 159         struct stream_connection *conn = pipe_conn->connection;
 160         struct named_pipe_call *call;
 161         enum ndr_err_code ndr_err;
 162         union netr_Validation val;
 163         struct auth_serversupplied_info *server_info;
 164         struct named_pipe_auth_req pipe_request;
 165         struct named_pipe_auth_rep pipe_reply;
 166         struct auth_context *auth_context;
 167         NTSTATUS status;
 168
 169         call = talloc(pipe_conn, struct named_pipe_call);
 170         if (call == NULL) {
 171                 named_pipe_terminate_connection(pipe_conn,
 172                                 "named_pipe_auth_request: "
 173                                 "no memory for named_pipe_call");
 174                 return;
 175         }
 176         call->pipe_conn = pipe_conn;
 177
 178         status = tstream_read_pdu_blob_recv(subreq,
 179                                             call,
 180                                             &call->in);
 181         TALLOC_FREE(subreq);
 182         if (!NT_STATUS_IS_OK(status)) {
 183                 const char *reason;
 184
 185                 reason = talloc_asprintf(call, "named_pipe_call_loop: "
 186                                          "tstream_read_pdu_blob_recv() - %s",
 187                                          nt_errstr(status));
 188                 if (reason == NULL) {
 189                         reason = nt_errstr(status);
 190                 }
 191
 192                 named_pipe_terminate_connection(pipe_conn, reason);
 193                 return;
 194         }
 195
 196         DEBUG(10,("Received named_pipe packet of length %lu from %s\n",
 197                  (long) call->in.length,
 198                  tsocket_address_string(pipe_conn->connection->remote_address, call)));
 199         dump_data(11, call->in.data, call->in.length);
 200
 201         /*
 202          * TODO: check it's a root (uid == 0) pipe
 203          */
 204
 205         ZERO_STRUCT(pipe_reply);
 206         pipe_reply.level = 0;
 207         pipe_reply.status = NT_STATUS_INTERNAL_ERROR;
 208
 209         /* parse the passed credentials */
 210         ndr_err = ndr_pull_struct_blob_all(
 211                         &call->in,
 212                         pipe_conn,
 213                         lp_iconv_convenience(conn->lp_ctx),
 214                         &pipe_request,
 215                         (ndr_pull_flags_fn_t) ndr_pull_named_pipe_auth_req);
 216         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 217                 pipe_reply.status = ndr_map_error2ntstatus(ndr_err);
 218                 DEBUG(2, ("Could not unmarshall named_pipe_auth_req: %s\n",
 219                           nt_errstr(pipe_reply.status)));
 220                 goto reply;
 221         }
 222
 223         if (DEBUGLVL(10)) {
 224                 NDR_PRINT_DEBUG(named_pipe_auth_req, &pipe_request);
 225         }
 226
 227         if (strcmp(NAMED_PIPE_AUTH_MAGIC, pipe_request.magic) != 0) {
 228                 DEBUG(2, ("named_pipe_auth_req: invalid magic '%s' != %s\n",
 229                           pipe_request.magic, NAMED_PIPE_AUTH_MAGIC));
 230                 pipe_reply.status = NT_STATUS_INVALID_PARAMETER;
 231                 goto reply;
 232         }
 233
 234         switch (pipe_request.level) {
 235         case 0:
 236                 /*
 237                  * anon connection, we don't create a session info
 238                  * and leave it NULL
 239                  */
 240                 pipe_reply.level = 0;
 241                 pipe_reply.status = NT_STATUS_OK;
 242                 break;
 243         case 1:
 244                 val.sam3 = &pipe_request.info.info1;
 245
 246                 pipe_reply.level = 1;
 247                 pipe_reply.status = make_server_info_netlogon_validation(pipe_conn,
 248                                                                          "TODO",
 249                                                                          3, &val,
 250                                                                          &server_info);
 251                 if (!NT_STATUS_IS_OK(pipe_reply.status)) {
 252                         DEBUG(2, ("make_server_info_netlogon_validation returned "
 253                                   "%s\n", nt_errstr(pipe_reply.status)));
 254                         goto reply;
 255                 }
 256
 257                 pipe_reply.status = auth_context_create(conn,
 258                                                         conn->event.ctx, conn->msg_ctx,
 259                                                         conn->lp_ctx,
 260                                                         &auth_context);
 261                 if (!NT_STATUS_IS_OK(pipe_reply.status)) {
 262                         DEBUG(2, ("auth_context_create returned "
 263                                   "%s\n", nt_errstr(pipe_reply.status)));
 264                         goto reply;
 265                 }
 266
 267
 268                 /* setup the session_info on the connection */
 269                 pipe_reply.status = auth_context->generate_session_info(conn,
 270                                                                         auth_context,
 271                                                                         server_info,
 272                                                                         &conn->session_info);
 273                 talloc_free(auth_context);
 274                 if (!NT_STATUS_IS_OK(pipe_reply.status)) {
 275                         DEBUG(2, ("auth_generate_session_info failed: %s\n",
 276                                   nt_errstr(pipe_reply.status)));
 277                         goto reply;
 278                 }
 279
 280                 break;
 281         case 2:
 282                 pipe_reply.level = 2;
 283                 pipe_reply.info.info2.file_type = FILE_TYPE_MESSAGE_MODE_PIPE;
 284                 pipe_reply.info.info2.device_state = 0xff | 0x0400 | 0x0100;
 285                 pipe_reply.info.info2.allocation_size = 4096;
 286
 287                 if (pipe_request.info.info2.sam_info3 == NULL) {
 288                         /*
 289                          * anon connection, we don't create a session info
 290                          * and leave it NULL
 291                          */
 292                         pipe_reply.status = NT_STATUS_OK;
 293                         break;
 294                 }
 295
 296                 val.sam3 = pipe_request.info.info2.sam_info3;
 297
 298                 pipe_reply.status = make_server_info_netlogon_validation(pipe_conn,
 299                                                 val.sam3->base.account_name.string,
 300                                                 3, &val, &server_info);
 301                 if (!NT_STATUS_IS_OK(pipe_reply.status)) {
 302                         DEBUG(2, ("make_server_info_netlogon_validation returned "
 303                                   "%s\n", nt_errstr(pipe_reply.status)));
 304                         goto reply;
 305                 }
 306
 307                 /* setup the session_info on the connection */
 308                 pipe_reply.status = auth_context_create(conn,
 309                                                         conn->event.ctx, conn->msg_ctx,
 310                                                         conn->lp_ctx,
 311                                                         &auth_context);
 312                 if (!NT_STATUS_IS_OK(pipe_reply.status)) {
 313                         DEBUG(2, ("auth_context_create returned "
 314                                   "%s\n", nt_errstr(pipe_reply.status)));
 315                         goto reply;
 316                 }
 317
 318                 pipe_reply.status = auth_context->generate_session_info(conn,
 319                                                                         auth_context,
 320                                                                         server_info,
 321                                                                         &conn->session_info);
 322                 talloc_free(auth_context);
 323                 if (!NT_STATUS_IS_OK(pipe_reply.status)) {
 324                         DEBUG(2, ("auth_generate_session_info failed: %s\n",
 325                                   nt_errstr(pipe_reply.status)));
 326                         goto reply;
 327                 }
 328
 329                 conn->session_info->session_key = data_blob_const(pipe_request.info.info2.session_key,
 330                                                         pipe_request.info.info2.session_key_length);
 331                 talloc_steal(conn->session_info, pipe_request.info.info2.session_key);
 332
 333                 break;
 334         case 3:
 335                 pipe_reply.level = 3;
 336                 pipe_reply.info.info3.file_type = FILE_TYPE_MESSAGE_MODE_PIPE;
 337                 pipe_reply.info.info3.device_state = 0xff | 0x0400 | 0x0100;
 338                 pipe_reply.info.info3.allocation_size = 4096;
 339
 340                 if (pipe_request.info.info3.sam_info3 == NULL) {
 341                         /*
 342                          * anon connection, we don't create a session info
 343                          * and leave it NULL
 344                          */
 345                         pipe_reply.status = NT_STATUS_OK;
 346                         break;
 347                 }
 348
 349                 val.sam3 = pipe_request.info.info3.sam_info3;
 350
 351                 pipe_reply.status = make_server_info_netlogon_validation(pipe_conn,
 352                                                 val.sam3->base.account_name.string,
 353                                                 3, &val, &server_info);
 354                 if (!NT_STATUS_IS_OK(pipe_reply.status)) {
 355                         DEBUG(2, ("make_server_info_netlogon_validation returned "
 356                                   "%s\n", nt_errstr(pipe_reply.status)));
 357                         goto reply;
 358                 }
 359
 360                 /* setup the session_info on the connection */
 361                 pipe_reply.status = auth_context_create(conn,
 362                                                         conn->event.ctx, conn->msg_ctx,
 363                                                         conn->lp_ctx,
 364                                                         &auth_context);
 365                 if (!NT_STATUS_IS_OK(pipe_reply.status)) {
 366                         DEBUG(2, ("auth_context_create returned "
 367                                   "%s\n", nt_errstr(pipe_reply.status)));
 368                         goto reply;
 369                 }
 370
 371                 /* setup the session_info on the connection */
 372                 pipe_reply.status = auth_context->generate_session_info(conn,
 373                                                                         auth_context,
 374                                                                         server_info,
 375                                                                         &conn->session_info);
 376                 talloc_free(auth_context);
 377                 if (!NT_STATUS_IS_OK(pipe_reply.status)) {
 378                         DEBUG(2, ("auth_generate_session_info failed: %s\n",
 379                                   nt_errstr(pipe_reply.status)));
 380                         goto reply;
 381                 }
 382
 383                 if (pipe_request.info.info3.gssapi_delegated_creds_length) {
 384                         OM_uint32 minor_status;
 385                         gss_buffer_desc cred_token;
 386                         gss_cred_id_t cred_handle;
 387                         int ret;
 388                         const char *error_string;
 389
 390                         DEBUG(10, ("named_pipe_auth: delegated credentials supplied by client\n"));
 391
 392                         cred_token.value = pipe_request.info.info3.gssapi_delegated_creds;
 393                         cred_token.length = pipe_request.info.info3.gssapi_delegated_creds_length;
 394
 395                         ret = gss_import_cred(&minor_status,
 396                                                &cred_token,
 397                                                &cred_handle);
 398                         if (ret != GSS_S_COMPLETE) {
 399                                 pipe_reply.status = NT_STATUS_INTERNAL_ERROR;
 400                                 goto reply;
 401                         }
 402
 403                         conn->session_info->credentials = cli_credentials_init(conn->session_info);
 404                         if (conn->session_info->credentials == NULL) {
 405                                 pipe_reply.status = NT_STATUS_NO_MEMORY;
 406                                 goto reply;
 407                         }
 408
 409                         cli_credentials_set_conf(conn->session_info->credentials,
 410                                                  conn->lp_ctx);
 411                         /* Just so we don't segfault trying to get at a username */
 412                         cli_credentials_set_anonymous(conn->session_info->credentials);
 413
 414                         ret = cli_credentials_set_client_gss_creds(conn->session_info->credentials,
 415                                                                    conn->event.ctx,
 416                                                                    conn->lp_ctx,
 417                                                                    cred_handle,
 418                                                                    CRED_SPECIFIED, &error_string);
 419                         if (ret) {
 420                                 pipe_reply.status = NT_STATUS_INTERNAL_ERROR;
 421                                 DEBUG(2, ("Failed to set pipe forwarded creds: %s\n", error_string));
 422                                 goto reply;
 423                         }
 424
 425                         /* This credential handle isn't useful for password authentication, so ensure nobody tries to do that */
 426                         cli_credentials_set_kerberos_state(conn->session_info->credentials,
 427                                                            CRED_MUST_USE_KERBEROS);
 428                 }
 429
 430                 conn->session_info->session_key = data_blob_const(pipe_request.info.info3.session_key,
 431                                                         pipe_request.info.info3.session_key_length);
 432                 talloc_steal(conn->session_info, pipe_request.info.info3.session_key);
 433
 434                 break;
 435         default:
 436                 DEBUG(0, ("named_pipe_auth_req: unknown level %u\n",
 437                           pipe_request.level));
 438                 pipe_reply.level = 0;
 439                 pipe_reply.status = NT_STATUS_INVALID_LEVEL;
 440                 goto reply;
 441         }
 442
 443 reply:
 444         /* create the output */
 445         ndr_err = ndr_push_struct_blob(&call->out, pipe_conn,
 446                         lp_iconv_convenience(conn->lp_ctx),
 447                         &pipe_reply,
 448                         (ndr_push_flags_fn_t)ndr_push_named_pipe_auth_rep);
 449         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 450                 const char *reason;
 451                 status = ndr_map_error2ntstatus(ndr_err);
 452
 453                 reason = talloc_asprintf(pipe_conn, "named_pipe_auth_request: could not marshall named_pipe_auth_rep: %s\n",
 454                                          nt_errstr(status));
 455                 if (reason == NULL) {
 456                         reason = "named_pipe_auth_request: could not marshall named_pipe_auth_rep";
 457                 }
 458                 named_pipe_terminate_connection(pipe_conn, reason);
 459                 return;
 460         }
 461
 462         DEBUG(10,("named_pipe_auth_request: named_pipe_auth reply[%u]\n",
 463                   (unsigned) call->out.length));
 464         dump_data(11, call->out.data, call->out.length);
 465         if (DEBUGLVL(10)) {
 466                 NDR_PRINT_DEBUG(named_pipe_auth_rep, &pipe_reply);
 467         }
 468
 469         call->status = pipe_reply.status;
 470
 471         call->out_iov[0].iov_base = call->out.data;
 472         call->out_iov[0].iov_len = call->out.length;
 473
 474         subreq = tstream_writev_send(call,
 475                                      pipe_conn->connection->event.ctx,
 476                                      pipe_conn->tstream,
 477                                      call->out_iov, 1);
 478         if (subreq == NULL) {
 479                 named_pipe_terminate_connection(pipe_conn, "named_pipe_auth_request: "
 480                                 "no memory for tstream_writev_send");
 481                 return;
 482         }
 483
 484         tevent_req_set_callback(subreq, named_pipe_handover_connection, call);
 485 }
 486
 487 static void named_pipe_handover_connection(struct tevent_req *subreq)
 488 {
 489         struct named_pipe_call *call = tevent_req_callback_data(subreq,
 490                         struct named_pipe_call);
 491         struct named_pipe_connection *pipe_conn = call->pipe_conn;
 492         struct stream_connection *conn = pipe_conn->connection;
 493         int sys_errno;
 494         int rc;
 495
 496         rc = tstream_writev_recv(subreq, &sys_errno);
 497         TALLOC_FREE(subreq);
 498         if (rc == -1) {
 499                 const char *reason;
 500
 501                 reason = talloc_asprintf(call, "named_pipe_handover_connection: "
 502                                          "tstream_writev_recv() - %d:%s",
 503                                          sys_errno, strerror(sys_errno));
 504                 if (reason == NULL) {
 505                         reason = "named_pipe_handover_connection: "
 506                                  "tstream_writev_recv() failed";
 507                 }
 508
 509                 named_pipe_terminate_connection(pipe_conn, reason);
 510                 return;
 511         }
 512
 513         if (!NT_STATUS_IS_OK(call->status)) {
 514                 const char *reason;
 515
 516                 reason = talloc_asprintf(call, "named_pipe_handover_connection: "
 517                                         "reply status - %s", nt_errstr(call->status));
 518                 if (reason == NULL) {
 519                         reason = nt_errstr(call->status);
 520                 }
 521
 522                 named_pipe_terminate_connection(pipe_conn, reason);
 523                 return;
 524         }
 525
 526         /*
 527          * remove the named_pipe layer together with its packet layer
 528          */
 529         conn->ops               = pipe_conn->pipe_sock->ops;
 530         conn->private_data      = pipe_conn->pipe_sock->private_data;
 531         talloc_unlink(conn, pipe_conn);
 532
 533         conn->event.fde = tevent_add_fd(conn->event.ctx,
 534                                         conn,
 535                                         socket_get_fd(conn->socket),
 536                                         TEVENT_FD_READ,
 537                                         stream_io_handler_fde,
 538                                         conn);
 539         if (conn->event.fde == NULL) {
 540                 named_pipe_terminate_connection(pipe_conn, "named_pipe_handover_connection: "
 541                                 "setting up the stream_io_handler_fde failed");
 542                 return;
 543         }
 544
 545         /*
 546          * hand over to the real pipe implementation,
 547          * now that we have setup the transport session_info
 548          */
 549         conn->ops->accept_connection(conn);
 550
 551         DEBUG(10,("named_pipe_handover_connection[%s]: succeeded\n",
 552               conn->ops->name));
 553
 554         /* we don't have to free call here as the connection got closed */
 555 }
 556
 557 /*
 558   called when a pipe socket becomes readable
 559 */
 560 static void named_pipe_recv(struct stream_connection *conn, uint16_t flags)
 561 {
 562         struct named_pipe_connection *pipe_conn = talloc_get_type(
 563                 conn->private_data, struct named_pipe_connection);
 564
 565         named_pipe_terminate_connection(pipe_conn,
 566                                         "named_pipe_recv: called");
 567 }
 568
 569 /*
 570   called when a pipe socket becomes writable
 571 */
 572 static void named_pipe_send(struct stream_connection *conn, uint16_t flags)
 573 {
 574         struct named_pipe_connection *pipe_conn = talloc_get_type(
 575                 conn->private_data, struct named_pipe_connection);
 576
 577         named_pipe_terminate_connection(pipe_conn,
 578                                         "named_pipe_send: called");
 579 }
 580
 581 static const struct stream_server_ops named_pipe_stream_ops = {
 582         .name                   = "named_pipe",
 583         .accept_connection      = named_pipe_accept,
 584         .recv_handler           = named_pipe_recv,
 585         .send_handler           = named_pipe_send,
 586 };
 587
 588 NTSTATUS stream_setup_named_pipe(struct tevent_context *event_context,
 589                                  struct loadparm_context *lp_ctx,
 590                                  const struct model_ops *model_ops,
 591                                  const struct stream_server_ops *stream_ops,
 592                                  const char *pipe_name,
 593                                  void *private_data)
 594 {
 595         char *dirname;
 596         struct named_pipe_socket *pipe_sock;
 597         NTSTATUS status = NT_STATUS_NO_MEMORY;;
 598
 599         pipe_sock = talloc(event_context, struct named_pipe_socket);
 600         if (pipe_sock == NULL) {
 601                 goto fail;
 602         }
 603
 604         /* remember the details about the pipe */
 605         pipe_sock->pipe_name    = talloc_strdup(pipe_sock, pipe_name);
 606         if (pipe_sock->pipe_name == NULL) {
 607                 goto fail;
 608         }
 609
 610         dirname = talloc_asprintf(pipe_sock, "%s/np", lp_ncalrpc_dir(lp_ctx));
 611         if (dirname == NULL) {
 612                 goto fail;
 613         }
 614
 615         if (!directory_create_or_exist(dirname, geteuid(), 0700)) {
 616                 status = map_nt_error_from_unix(errno);
 617                 DEBUG(0,(__location__ ": Failed to create stream pipe directory %s - %s\n",
 618                          dirname, nt_errstr(status)));
 619                 goto fail;
 620         }
 621
 622         if (strncmp(pipe_name, "\\pipe\\", 6) == 0) {
 623                 pipe_name += 6;
 624         }
 625
 626         pipe_sock->pipe_path = talloc_asprintf(pipe_sock, "%s/%s", dirname,
 627                                                pipe_name);
 628         if (pipe_sock->pipe_path == NULL) {
 629                 goto fail;
 630         }
 631
 632         talloc_free(dirname);
 633
 634         pipe_sock->ops          = stream_ops;
 635         pipe_sock->private_data = talloc_reference(pipe_sock, private_data);
 636
 637         status = stream_setup_socket(event_context,
 638                                      lp_ctx,
 639                                      model_ops,
 640                                      &named_pipe_stream_ops,
 641                                      "unix",
 642                                      pipe_sock->pipe_path,
 643                                      NULL,
 644                                      NULL,
 645                                      pipe_sock);
 646         if (!NT_STATUS_IS_OK(status)) {
 647                 goto fail;
 648         }
 649         return NT_STATUS_OK;
 650
 651  fail:
 652         talloc_free(pipe_sock);
 653         return status;
 654 }