source4/librpc/rpc/dcerpc_connect.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    dcerpc connect functions
   5
   6    Copyright (C) Andrew Tridgell 2003
   7    Copyright (C) Jelmer Vernooij 2004
   8    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2007
   9    Copyright (C) Rafal Szczesniak  2005
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25
  26 #include "includes.h"
  27 #include "libcli/composite/composite.h"
  28 #include "libcli/smb_composite/smb_composite.h"
  29 #include "lib/events/events.h"
  30 #include "libcli/smb2/smb2.h"
  31 #include "libcli/smb2/smb2_calls.h"
  32 #include "libcli/smb/smbXcli_base.h"
  33 #include "librpc/rpc/dcerpc.h"
  34 #include "librpc/rpc/dcerpc_proto.h"
  35 #include "auth/credentials/credentials.h"
  36 #include "param/param.h"
  37 #include "libcli/resolve/resolve.h"
  38
  39 struct dcerpc_pipe_connect {
  40         struct dcecli_connection *conn;
  41         struct dcerpc_binding *binding;
  42         const struct ndr_interface_table *interface;
  43         struct cli_credentials *creds;
  44         struct resolve_context *resolve_ctx;
  45         struct {
  46                 const char *dir;
  47         } ncalrpc;
  48         struct {
  49                 struct smbXcli_conn *conn;
  50                 struct smbXcli_session *session;
  51                 struct smbXcli_tcon *tcon;
  52                 const char *pipe_name;
  53         } smb;
  54 };
  55
  56 struct pipe_np_smb_state {
  57         struct smb_composite_connect conn;
  58         struct dcerpc_pipe_connect io;
  59 };
  60
  61
  62 /*
  63   Stage 3 of ncacn_np_smb: Named pipe opened (or not)
  64 */
  65 static void continue_pipe_open_smb(struct composite_context *ctx)
  66 {
  67         struct composite_context *c = talloc_get_type(ctx->async.private_data,
  68                                                       struct composite_context);
  69
  70         /* receive result of named pipe open request on smb */
  71         c->status = dcerpc_pipe_open_smb_recv(ctx);
  72         if (!composite_is_ok(c)) return;
  73
  74         composite_done(c);
  75 }
  76
  77 static void continue_smb_open(struct composite_context *c);
  78
  79 /*
  80   Stage 2 of ncacn_np_smb: Open a named pipe after successful smb connection
  81 */
  82 static void continue_smb_connect(struct composite_context *ctx)
  83 {
  84         struct composite_context *c = talloc_get_type(ctx->async.private_data,
  85                                                       struct composite_context);
  86         struct pipe_np_smb_state *s = talloc_get_type(c->private_data,
  87                                                       struct pipe_np_smb_state);
  88         struct smbcli_tree *t;
  89
  90         /* receive result of smb connect request */
  91         c->status = smb_composite_connect_recv(ctx, s->io.conn);
  92         if (!composite_is_ok(c)) return;
  93
  94         t = s->conn.out.tree;
  95
  96         /* prepare named pipe open parameters */
  97         s->io.smb.conn = t->session->transport->conn;
  98         s->io.smb.session = t->session->smbXcli;
  99         s->io.smb.tcon = t->smbXcli;
 100         smb1cli_tcon_set_id(s->io.smb.tcon, t->tid);
 101         s->io.smb.pipe_name = dcerpc_binding_get_string_option(s->io.binding,
 102                                                                "endpoint");
 103
 104         continue_smb_open(c);
 105 }
 106
 107 static void continue_smb_open(struct composite_context *c)
 108 {
 109         struct pipe_np_smb_state *s = talloc_get_type(c->private_data,
 110                                                       struct pipe_np_smb_state);
 111         struct composite_context *open_ctx;
 112
 113         /* send named pipe open request */
 114         open_ctx = dcerpc_pipe_open_smb_send(s->io.conn,
 115                                              s->io.smb.conn,
 116                                              s->io.smb.session,
 117                                              s->io.smb.tcon,
 118                                              DCERPC_REQUEST_TIMEOUT * 1000,
 119                                              s->io.smb.pipe_name);
 120         if (composite_nomem(open_ctx, c)) return;
 121
 122         composite_continue(c, open_ctx, continue_pipe_open_smb, c);
 123 }
 124
 125
 126 /*
 127   Initiate async open of a rpc connection to a rpc pipe on SMB using
 128   the binding structure to determine the endpoint and options
 129 */
 130 static struct composite_context *dcerpc_pipe_connect_ncacn_np_smb_send(TALLOC_CTX *mem_ctx, struct dcerpc_pipe_connect *io, struct loadparm_context *lp_ctx)
 131 {
 132         struct composite_context *c;
 133         struct pipe_np_smb_state *s;
 134         struct composite_context *conn_req;
 135         struct smb_composite_connect *conn;
 136         uint32_t flags;
 137
 138         /* composite context allocation and setup */
 139         c = composite_create(mem_ctx, io->conn->event_ctx);
 140         if (c == NULL) return NULL;
 141
 142         s = talloc_zero(c, struct pipe_np_smb_state);
 143         if (composite_nomem(s, c)) return c;
 144         c->private_data = s;
 145
 146         s->io  = *io;
 147         conn   = &s->conn;
 148
 149         if (smbXcli_conn_is_connected(s->io.smb.conn)) {
 150                 continue_smb_open(c);
 151                 return c;
 152         }
 153
 154         /* prepare smb connection parameters: we're connecting to IPC$ share on
 155            remote rpc server */
 156         conn->in.dest_host = dcerpc_binding_get_string_option(s->io.binding, "host");
 157         conn->in.dest_ports = lpcfg_smb_ports(lp_ctx);
 158         conn->in.called_name =
 159                 dcerpc_binding_get_string_option(s->io.binding, "target_hostname");
 160         if (conn->in.called_name == NULL) {
 161                 conn->in.called_name = "*SMBSERVER";
 162         }
 163         conn->in.socket_options         = lpcfg_socket_options(lp_ctx);
 164         conn->in.service                = "IPC$";
 165         conn->in.service_type           = NULL;
 166         conn->in.workgroup              = lpcfg_workgroup(lp_ctx);
 167         conn->in.gensec_settings = lpcfg_gensec_settings(conn, lp_ctx);
 168
 169         lpcfg_smbcli_options(lp_ctx, &conn->in.options);
 170         lpcfg_smbcli_session_options(lp_ctx, &conn->in.session_options);
 171
 172         /*
 173          * provide proper credentials - user supplied, but allow a
 174          * fallback to anonymous if this is an schannel connection
 175          * (might be NT4 not allowing machine logins at session
 176          * setup) or if asked to do so by the caller (perhaps a SAMR password change?)
 177          */
 178         s->conn.in.credentials = s->io.creds;
 179         flags = dcerpc_binding_get_flags(s->io.binding);
 180         if (flags & (DCERPC_SCHANNEL|DCERPC_ANON_FALLBACK)) {
 181                 conn->in.fallback_to_anonymous  = true;
 182         } else {
 183                 conn->in.fallback_to_anonymous  = false;
 184         }
 185
 186         conn->in.options.min_protocol = PROTOCOL_NT1;
 187         conn->in.options.max_protocol = PROTOCOL_NT1;
 188
 189         conn->in.options.signing = lpcfg_client_ipc_signing(lp_ctx);
 190
 191         /* send smb connect request */
 192         conn_req = smb_composite_connect_send(conn, s->io.conn,
 193                                               s->io.resolve_ctx,
 194                                               c->event_ctx);
 195         if (composite_nomem(conn_req, c)) return c;
 196
 197         composite_continue(c, conn_req, continue_smb_connect, c);
 198         return c;
 199 }
 200
 201
 202 /*
 203   Receive result of a rpc connection to a rpc pipe on SMB
 204 */
 205 static NTSTATUS dcerpc_pipe_connect_ncacn_np_smb_recv(struct composite_context *c)
 206 {
 207         NTSTATUS status = composite_wait(c);
 208
 209         talloc_free(c);
 210         return status;
 211 }
 212
 213 /*
 214   Stage 2 of ncacn_np_smb2: Open a named pipe after successful smb2 connection
 215 */
 216 static void continue_smb2_connect(struct tevent_req *subreq)
 217 {
 218         struct composite_context *c =
 219                 tevent_req_callback_data(subreq,
 220                 struct composite_context);
 221         struct pipe_np_smb_state *s = talloc_get_type(c->private_data,
 222                                                       struct pipe_np_smb_state);
 223         struct smb2_tree *t;
 224
 225         /* receive result of smb2 connect request */
 226         c->status = smb2_connect_recv(subreq, s->io.conn, &t);
 227         TALLOC_FREE(subreq);
 228         if (!composite_is_ok(c)) return;
 229
 230         s->io.smb.conn = t->session->transport->conn;
 231         s->io.smb.session = t->session->smbXcli;
 232         s->io.smb.tcon = t->smbXcli;
 233         s->io.smb.pipe_name = dcerpc_binding_get_string_option(s->io.binding,
 234                                                                "endpoint");
 235
 236         continue_smb_open(c);
 237 }
 238
 239
 240 /*
 241    Initiate async open of a rpc connection request on SMB2 using
 242    the binding structure to determine the endpoint and options
 243 */
 244 static struct composite_context *dcerpc_pipe_connect_ncacn_np_smb2_send(
 245                                         TALLOC_CTX *mem_ctx,
 246                                         struct dcerpc_pipe_connect *io,
 247                                         struct loadparm_context *lp_ctx)
 248 {
 249         struct composite_context *c;
 250         struct pipe_np_smb_state *s;
 251         struct tevent_req *subreq;
 252         struct smbcli_options options;
 253         const char *host;
 254         uint32_t flags;
 255
 256         /* composite context allocation and setup */
 257         c = composite_create(mem_ctx, io->conn->event_ctx);
 258         if (c == NULL) return NULL;
 259
 260         s = talloc_zero(c, struct pipe_np_smb_state);
 261         if (composite_nomem(s, c)) return c;
 262         c->private_data = s;
 263
 264         s->io = *io;
 265
 266         if (smbXcli_conn_is_connected(s->io.smb.conn)) {
 267                 continue_smb_open(c);
 268                 return c;
 269         }
 270
 271         host = dcerpc_binding_get_string_option(s->io.binding, "host");
 272         flags = dcerpc_binding_get_flags(s->io.binding);
 273
 274         /*
 275          * provide proper credentials - user supplied or anonymous in case this is
 276          * schannel connection
 277          */
 278         if (flags & DCERPC_SCHANNEL) {
 279                 s->io.creds = cli_credentials_init_anon(mem_ctx);
 280                 if (composite_nomem(s->io.creds, c)) return c;
 281         }
 282
 283         lpcfg_smbcli_options(lp_ctx, &options);
 284
 285         options.min_protocol = lpcfg_client_ipc_min_protocol(lp_ctx);
 286         if (options.min_protocol < PROTOCOL_SMB2_02) {
 287                 options.min_protocol = PROTOCOL_SMB2_02;
 288         }
 289         options.max_protocol = lpcfg_client_ipc_max_protocol(lp_ctx);
 290         if (options.max_protocol < PROTOCOL_SMB2_02) {
 291                 options.max_protocol = PROTOCOL_SMB2_02;
 292         }
 293
 294         options.signing = lpcfg_client_ipc_signing(lp_ctx);
 295
 296         /* send smb2 connect request */
 297         subreq = smb2_connect_send(s, c->event_ctx,
 298                         host,
 299                         lpcfg_parm_string_list(mem_ctx, lp_ctx, NULL, "smb2", "ports", NULL),
 300                         "IPC$",
 301                         s->io.resolve_ctx,
 302                         s->io.creds,
 303                         0, /* previous_session_id */
 304                         &options,
 305                         lpcfg_socket_options(lp_ctx),
 306                         lpcfg_gensec_settings(mem_ctx, lp_ctx));
 307         if (composite_nomem(subreq, c)) return c;
 308         tevent_req_set_callback(subreq, continue_smb2_connect, c);
 309         return c;
 310 }
 311
 312
 313 /*
 314   Receive result of a rpc connection to a rpc pipe on SMB2
 315 */
 316 static NTSTATUS dcerpc_pipe_connect_ncacn_np_smb2_recv(struct composite_context *c)
 317 {
 318         NTSTATUS status = composite_wait(c);
 319
 320         talloc_free(c);
 321         return status;
 322 }
 323
 324
 325 struct pipe_ip_tcp_state {
 326         struct dcerpc_pipe_connect io;
 327         const char *localaddr;
 328         const char *host;
 329         const char *target_hostname;
 330         uint32_t port;
 331 };
 332
 333
 334 /*
 335   Stage 2 of ncacn_ip_tcp: rpc pipe opened (or not)
 336 */
 337 static void continue_pipe_open_ncacn_ip_tcp(struct composite_context *ctx)
 338 {
 339         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 340                                                       struct composite_context);
 341         struct pipe_ip_tcp_state *s = talloc_get_type(c->private_data,
 342                                                       struct pipe_ip_tcp_state);
 343         char *localaddr = NULL;
 344         char *remoteaddr = NULL;
 345
 346         /* receive result of named pipe open request on tcp/ip */
 347         c->status = dcerpc_pipe_open_tcp_recv(ctx, s, &localaddr, &remoteaddr);
 348         if (!composite_is_ok(c)) return;
 349
 350         c->status = dcerpc_binding_set_string_option(s->io.binding,
 351                                                      "localaddress",
 352                                                      localaddr);
 353         if (!composite_is_ok(c)) return;
 354
 355         c->status = dcerpc_binding_set_string_option(s->io.binding,
 356                                                      "host",
 357                                                      remoteaddr);
 358         if (!composite_is_ok(c)) return;
 359
 360         composite_done(c);
 361 }
 362
 363
 364 /*
 365   Initiate async open of a rpc connection to a rpc pipe on TCP/IP using
 366   the binding structure to determine the endpoint and options
 367 */
 368 static struct composite_context* dcerpc_pipe_connect_ncacn_ip_tcp_send(TALLOC_CTX *mem_ctx,
 369                                                                        struct dcerpc_pipe_connect *io)
 370 {
 371         struct composite_context *c;
 372         struct pipe_ip_tcp_state *s;
 373         struct composite_context *pipe_req;
 374         const char *endpoint;
 375
 376         /* composite context allocation and setup */
 377         c = composite_create(mem_ctx, io->conn->event_ctx);
 378         if (c == NULL) return NULL;
 379
 380         s = talloc_zero(c, struct pipe_ip_tcp_state);
 381         if (composite_nomem(s, c)) return c;
 382         c->private_data = s;
 383
 384         /* store input parameters in state structure */
 385         s->io = *io;
 386         s->localaddr = dcerpc_binding_get_string_option(io->binding,
 387                                                         "localaddress");
 388         s->host = dcerpc_binding_get_string_option(io->binding, "host");
 389         s->target_hostname = dcerpc_binding_get_string_option(io->binding,
 390                                                               "target_hostname");
 391         endpoint = dcerpc_binding_get_string_option(io->binding, "endpoint");
 392         /* port number is a binding endpoint here */
 393         if (endpoint != NULL) {
 394                 s->port = atoi(endpoint);
 395         }
 396
 397         if (s->port == 0) {
 398                 composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 399                 return c;
 400         }
 401
 402         /* send pipe open request on tcp/ip */
 403         pipe_req = dcerpc_pipe_open_tcp_send(s->io.conn, s->localaddr, s->host, s->target_hostname,
 404                                              s->port, io->resolve_ctx);
 405         composite_continue(c, pipe_req, continue_pipe_open_ncacn_ip_tcp, c);
 406         return c;
 407 }
 408
 409
 410 /*
 411   Receive result of a rpc connection to a rpc pipe on TCP/IP
 412 */
 413 static NTSTATUS dcerpc_pipe_connect_ncacn_ip_tcp_recv(struct composite_context *c)
 414 {
 415         NTSTATUS status = composite_wait(c);
 416
 417         talloc_free(c);
 418         return status;
 419 }
 420
 421
 422 struct pipe_http_state {
 423         struct dcerpc_pipe_connect io;
 424         const char *localaddr;
 425         const char *rpc_server;
 426         uint32_t rpc_server_port;
 427         char *rpc_proxy;
 428         uint32_t rpc_proxy_port;
 429         char *http_proxy;
 430         uint32_t http_proxy_port;
 431         bool use_tls;
 432         bool use_proxy;
 433         bool use_ntlm;
 434         struct loadparm_context *lp_ctx;
 435 };
 436
 437 /*
 438   Stage 2 of ncacn_http: rpc pipe opened (or not)
 439  */
 440 static void continue_pipe_open_ncacn_http(struct tevent_req *subreq)
 441 {
 442         struct composite_context *c = NULL;
 443         struct pipe_http_state *s = NULL;
 444         struct tstream_context *stream = NULL;
 445         struct tevent_queue *queue = NULL;
 446
 447         c = tevent_req_callback_data(subreq, struct composite_context);
 448         s = talloc_get_type(c->private_data, struct pipe_http_state);
 449
 450         /* receive result of RoH connect request */
 451         c->status = dcerpc_pipe_open_roh_recv(subreq, s->io.conn,
 452                                               &stream, &queue);
 453         TALLOC_FREE(subreq);
 454         if (!composite_is_ok(c)) return;
 455
 456         s->io.conn->transport.transport = NCACN_HTTP;
 457         s->io.conn->transport.stream = stream;
 458         s->io.conn->transport.write_queue = queue;
 459         s->io.conn->transport.pending_reads = 0;
 460
 461         composite_done(c);
 462 }
 463
 464 /*
 465   Initiate async open of a rpc connection to a rpc pipe using HTTP transport,
 466   and using the binding structure to determine the endpoint and options
 467 */
 468 static struct composite_context* dcerpc_pipe_connect_ncacn_http_send(
 469                 TALLOC_CTX *mem_ctx, struct dcerpc_pipe_connect *io,
 470                 struct loadparm_context *lp_ctx)
 471 {
 472         struct composite_context *c;
 473         struct pipe_http_state *s;
 474         struct tevent_req *subreq;
 475         const char *endpoint;
 476         const char *use_proxy;
 477         char *proxy;
 478         char *port;
 479         const char *opt;
 480
 481         /* composite context allocation and setup */
 482         c = composite_create(mem_ctx, io->conn->event_ctx);
 483         if (c == NULL) return NULL;
 484
 485         s = talloc_zero(c, struct pipe_http_state);
 486         if (composite_nomem(s, c)) return c;
 487         c->private_data = s;
 488
 489         /* store input parameters in state structure */
 490         s->lp_ctx       = lp_ctx;
 491         s->io           = *io;
 492         s->localaddr    = dcerpc_binding_get_string_option(io->binding,
 493                                                         "localaddress");
 494         /* RPC server and port (the endpoint) */
 495         s->rpc_server = dcerpc_binding_get_string_option(io->binding, "host");
 496         endpoint = dcerpc_binding_get_string_option(io->binding, "endpoint");
 497         if (endpoint == NULL) {
 498                 composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 499                 return c;
 500         }
 501         s->rpc_server_port = atoi(endpoint);
 502         if (s->rpc_server_port == 0) {
 503                 composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 504                 return c;
 505         }
 506
 507         /* Use TLS */
 508         opt = dcerpc_binding_get_string_option(io->binding, "HttpUseTls");
 509         if (opt) {
 510                 if (strcasecmp(opt, "true") == 0) {
 511                         s->use_tls = true;
 512                 } else if (strcasecmp(opt, "false") == 0) {
 513                         s->use_tls = false;
 514                 } else {
 515                         composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 516                         return c;
 517                 }
 518         } else {
 519                 s->use_tls = true;
 520         }
 521
 522         /* RPC Proxy */
 523         proxy = port = talloc_strdup(s, dcerpc_binding_get_string_option(
 524                         io->binding, "RpcProxy"));
 525         s->rpc_proxy  = strsep(&port, ":");
 526         if (proxy && port) {
 527                 s->rpc_proxy_port = atoi(port);
 528         } else {
 529                 s->rpc_proxy_port = s->use_tls ? 443 : 80;
 530         }
 531         if (s->rpc_proxy == NULL) {
 532                 s->rpc_proxy = talloc_strdup(s, s->rpc_server);
 533                 if (composite_nomem(s->rpc_proxy, c)) return c;
 534         }
 535
 536         /* HTTP Proxy */
 537         proxy = port = talloc_strdup(s, dcerpc_binding_get_string_option(
 538                         io->binding, "HttpProxy"));
 539         s->http_proxy = strsep(&port, ":");
 540         if (proxy && port) {
 541                 s->http_proxy_port = atoi(port);
 542         } else {
 543                 s->http_proxy_port = s->use_tls ? 443 : 80;
 544         }
 545
 546         /* Use local proxy */
 547         use_proxy = dcerpc_binding_get_string_option(io->binding,
 548                                                  "HttpConnectOption");
 549         if (use_proxy && strcasecmp(use_proxy, "UseHttpProxy")) {
 550                 s->use_proxy = true;
 551         }
 552
 553         /* If use local proxy set, the http proxy should be provided */
 554         if (s->use_proxy && !s->http_proxy) {
 555                 composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 556                 return c;
 557         }
 558
 559         /* Check which HTTP authentication method to use */
 560         opt = dcerpc_binding_get_string_option(io->binding, "HttpAuthOption");
 561         if (opt) {
 562                 if (strcasecmp(opt, "basic") == 0) {
 563                         s->use_ntlm = false;
 564                 } else if (strcasecmp(opt, "ntlm") == 0) {
 565                         s->use_ntlm = true;
 566                 } else {
 567                         composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 568                         return c;
 569                 }
 570         } else {
 571                 s->use_ntlm = true;
 572         }
 573
 574         subreq = dcerpc_pipe_open_roh_send(s->io.conn, s->localaddr,
 575                                            s->rpc_server, s->rpc_server_port,
 576                                            s->rpc_proxy, s->rpc_proxy_port,
 577                                            s->http_proxy, s->http_proxy_port,
 578                                            s->use_tls, s->use_proxy,
 579                                            s->io.creds, io->resolve_ctx,
 580                                            s->lp_ctx, s->use_ntlm);
 581         if (composite_nomem(subreq, c)) return c;
 582
 583         tevent_req_set_callback(subreq, continue_pipe_open_ncacn_http, c);
 584         return c;
 585 }
 586
 587 static NTSTATUS dcerpc_pipe_connect_ncacn_http_recv(struct composite_context *c)
 588 {
 589         return composite_wait_free(c);
 590 }
 591
 592
 593 struct pipe_unix_state {
 594         struct dcerpc_pipe_connect io;
 595         const char *path;
 596 };
 597
 598
 599 /*
 600   Stage 2 of ncacn_unix: rpc pipe opened (or not)
 601 */
 602 static void continue_pipe_open_ncacn_unix_stream(struct composite_context *ctx)
 603 {
 604         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 605                                                       struct composite_context);
 606
 607         /* receive result of pipe open request on unix socket */
 608         c->status = dcerpc_pipe_open_unix_stream_recv(ctx);
 609         if (!composite_is_ok(c)) return;
 610
 611         composite_done(c);
 612 }
 613
 614
 615 /*
 616   Initiate async open of a rpc connection to a rpc pipe on unix socket using
 617   the binding structure to determine the endpoint and options
 618 */
 619 static struct composite_context* dcerpc_pipe_connect_ncacn_unix_stream_send(TALLOC_CTX *mem_ctx,
 620                                                                             struct dcerpc_pipe_connect *io)
 621 {
 622         struct composite_context *c;
 623         struct pipe_unix_state *s;
 624         struct composite_context *pipe_req;
 625
 626         /* composite context allocation and setup */
 627         c = composite_create(mem_ctx, io->conn->event_ctx);
 628         if (c == NULL) return NULL;
 629
 630         s = talloc_zero(c, struct pipe_unix_state);
 631         if (composite_nomem(s, c)) return c;
 632         c->private_data = s;
 633
 634         /* prepare pipe open parameters and store them in state structure
 635            also, verify whether biding endpoint is not null */
 636         s->io = *io;
 637
 638         s->path = dcerpc_binding_get_string_option(io->binding, "endpoint");
 639         if (s->path == NULL) {
 640                 composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 641                 return c;
 642         }
 643
 644         /* send pipe open request on unix socket */
 645         pipe_req = dcerpc_pipe_open_unix_stream_send(s->io.conn, s->path);
 646         composite_continue(c, pipe_req, continue_pipe_open_ncacn_unix_stream, c);
 647         return c;
 648 }
 649
 650
 651 /*
 652   Receive result of a rpc connection to a pipe on unix socket
 653 */
 654 static NTSTATUS dcerpc_pipe_connect_ncacn_unix_stream_recv(struct composite_context *c)
 655 {
 656         NTSTATUS status = composite_wait(c);
 657
 658         talloc_free(c);
 659         return status;
 660 }
 661
 662
 663 struct pipe_ncalrpc_state {
 664         struct dcerpc_pipe_connect io;
 665 };
 666
 667 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c);
 668
 669 /*
 670   Stage 2 of ncalrpc: rpc pipe opened (or not)
 671 */
 672 static void continue_pipe_open_ncalrpc(struct composite_context *ctx)
 673 {
 674         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 675                                                       struct composite_context);
 676
 677         /* receive result of pipe open request on ncalrpc */
 678         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 679         if (!composite_is_ok(c)) return;
 680
 681         composite_done(c);
 682 }
 683
 684
 685 /*
 686    Initiate async open of a rpc connection request on NCALRPC using
 687    the binding structure to determine the endpoint and options
 688 */
 689 static struct composite_context* dcerpc_pipe_connect_ncalrpc_send(TALLOC_CTX *mem_ctx,
 690                                                                   struct dcerpc_pipe_connect *io)
 691 {
 692         struct composite_context *c;
 693         struct pipe_ncalrpc_state *s;
 694         struct composite_context *pipe_req;
 695         const char *endpoint;
 696
 697         /* composite context allocation and setup */
 698         c = composite_create(mem_ctx, io->conn->event_ctx);
 699         if (c == NULL) return NULL;
 700
 701         s = talloc_zero(c, struct pipe_ncalrpc_state);
 702         if (composite_nomem(s, c)) return c;
 703         c->private_data = s;
 704
 705         /* store input parameters in state structure */
 706         s->io  = *io;
 707
 708         endpoint = dcerpc_binding_get_string_option(io->binding, "endpoint");
 709         if (endpoint == NULL) {
 710                 composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 711                 return c;
 712         }
 713
 714         /* send pipe open request */
 715         pipe_req = dcerpc_pipe_open_pipe_send(s->io.conn,
 716                                               s->io.ncalrpc.dir,
 717                                               endpoint);
 718         composite_continue(c, pipe_req, continue_pipe_open_ncalrpc, c);
 719         return c;
 720 }
 721
 722
 723 /*
 724   Receive result of a rpc connection to a rpc pipe on NCALRPC
 725 */
 726 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c)
 727 {
 728         NTSTATUS status = composite_wait(c);
 729
 730         talloc_free(c);
 731         return status;
 732 }
 733
 734
 735 struct pipe_connect_state {
 736         struct dcerpc_pipe *pipe;
 737         struct dcerpc_binding *binding;
 738         const struct ndr_interface_table *table;
 739         struct cli_credentials *credentials;
 740         struct loadparm_context *lp_ctx;
 741 };
 742
 743
 744 static void continue_map_binding(struct composite_context *ctx);
 745 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s);
 746 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx);
 747 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx);
 748 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx);
 749 static void continue_pipe_connect_ncacn_http(struct composite_context *ctx);
 750 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx);
 751 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx);
 752 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s);
 753 static void continue_pipe_auth(struct composite_context *ctx);
 754
 755
 756 /*
 757   Stage 2 of pipe_connect_b: Receive result of endpoint mapping
 758 */
 759 static void continue_map_binding(struct composite_context *ctx)
 760 {
 761         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 762                                                       struct composite_context);
 763         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 764                                                        struct pipe_connect_state);
 765         const char *endpoint;
 766
 767         c->status = dcerpc_epm_map_binding_recv(ctx);
 768         if (!composite_is_ok(c)) return;
 769
 770         endpoint = dcerpc_binding_get_string_option(s->binding, "endpoint");
 771         DEBUG(4,("Mapped to DCERPC endpoint %s\n", endpoint));
 772
 773         continue_connect(c, s);
 774 }
 775
 776
 777 /*
 778   Stage 2 of pipe_connect_b: Continue connection after endpoint is known
 779 */
 780 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s)
 781 {
 782         struct dcerpc_pipe_connect pc;
 783
 784         /* potential exits to another stage by sending an async request */
 785         struct composite_context *ncacn_np_smb2_req;
 786         struct composite_context *ncacn_np_smb_req;
 787         struct composite_context *ncacn_ip_tcp_req;
 788         struct composite_context *ncacn_http_req;
 789         struct composite_context *ncacn_unix_req;
 790         struct composite_context *ncalrpc_req;
 791         enum dcerpc_transport_t transport;
 792         enum protocol_types min_ipc_protocol;
 793         uint32_t flags;
 794
 795         /* dcerpc pipe connect input parameters */
 796         ZERO_STRUCT(pc);
 797         pc.conn         = s->pipe->conn;
 798         pc.binding      = s->binding;
 799         pc.interface    = s->table;
 800         pc.creds        = s->credentials;
 801         pc.resolve_ctx  = lpcfg_resolve_context(s->lp_ctx);
 802
 803         transport = dcerpc_binding_get_transport(s->binding);
 804         flags = dcerpc_binding_get_flags(s->binding);
 805
 806         min_ipc_protocol = lpcfg_client_ipc_min_protocol(s->lp_ctx);
 807         if (min_ipc_protocol >= PROTOCOL_SMB2_02) {
 808                 flags |= DCERPC_SMB2;
 809         }
 810
 811         /* connect dcerpc pipe depending on required transport */
 812         switch (transport) {
 813         case NCACN_NP:
 814                 if (flags & DCERPC_SMB2) {
 815                         /* new varient of SMB a.k.a. SMB2 */
 816                         ncacn_np_smb2_req = dcerpc_pipe_connect_ncacn_np_smb2_send(c, &pc, s->lp_ctx);
 817                         composite_continue(c, ncacn_np_smb2_req, continue_pipe_connect_ncacn_np_smb2, c);
 818                         return;
 819
 820                 } else {
 821                         /* good old ordinary SMB */
 822                         ncacn_np_smb_req = dcerpc_pipe_connect_ncacn_np_smb_send(c, &pc, s->lp_ctx);
 823                         composite_continue(c, ncacn_np_smb_req, continue_pipe_connect_ncacn_np_smb, c);
 824                         return;
 825                 }
 826                 break;
 827
 828         case NCACN_IP_TCP:
 829                 ncacn_ip_tcp_req = dcerpc_pipe_connect_ncacn_ip_tcp_send(c, &pc);
 830                 composite_continue(c, ncacn_ip_tcp_req, continue_pipe_connect_ncacn_ip_tcp, c);
 831                 return;
 832
 833         case NCACN_HTTP:
 834                 ncacn_http_req = dcerpc_pipe_connect_ncacn_http_send(c, &pc, s->lp_ctx);
 835                 composite_continue(c, ncacn_http_req, continue_pipe_connect_ncacn_http, c);
 836                 return;
 837
 838         case NCACN_UNIX_STREAM:
 839                 ncacn_unix_req = dcerpc_pipe_connect_ncacn_unix_stream_send(c, &pc);
 840                 composite_continue(c, ncacn_unix_req, continue_pipe_connect_ncacn_unix, c);
 841                 return;
 842
 843         case NCALRPC:
 844                 pc.ncalrpc.dir = lpcfg_ncalrpc_dir(s->lp_ctx);
 845                 c->status = dcerpc_binding_set_string_option(s->binding, "ncalrpc_dir",
 846                                                              pc.ncalrpc.dir);
 847                 if (!composite_is_ok(c)) return;
 848                 ncalrpc_req = dcerpc_pipe_connect_ncalrpc_send(c, &pc);
 849                 composite_continue(c, ncalrpc_req, continue_pipe_connect_ncalrpc, c);
 850                 return;
 851
 852         default:
 853                 /* looks like a transport we don't support now */
 854                 composite_error(c, NT_STATUS_NOT_SUPPORTED);
 855         }
 856 }
 857
 858
 859 /*
 860   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 861   named pipe on smb2
 862 */
 863 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx)
 864 {
 865         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 866                                                       struct composite_context);
 867         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 868                                                        struct pipe_connect_state);
 869
 870         c->status = dcerpc_pipe_connect_ncacn_np_smb2_recv(ctx);
 871         if (!composite_is_ok(c)) return;
 872
 873         continue_pipe_connect(c, s);
 874 }
 875
 876
 877 /*
 878   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 879   named pipe on smb
 880 */
 881 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx)
 882 {
 883         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 884                                                       struct composite_context);
 885         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 886                                                        struct pipe_connect_state);
 887
 888         c->status = dcerpc_pipe_connect_ncacn_np_smb_recv(ctx);
 889         if (!composite_is_ok(c)) return;
 890
 891         continue_pipe_connect(c, s);
 892 }
 893
 894
 895 /*
 896   Stage 3 of pipe_connect_b: Receive result of pipe connect request on tcp/ip
 897 */
 898 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx)
 899 {
 900         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 901                                                       struct composite_context);
 902         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 903                                                        struct pipe_connect_state);
 904
 905         c->status = dcerpc_pipe_connect_ncacn_ip_tcp_recv(ctx);
 906         if (!composite_is_ok(c)) return;
 907
 908         continue_pipe_connect(c, s);
 909 }
 910
 911
 912 /*
 913   Stage 3 of pipe_connect_b: Receive result of pipe connect request on http
 914 */
 915 static void continue_pipe_connect_ncacn_http(struct composite_context *ctx)
 916 {
 917         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 918                                                       struct composite_context);
 919         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 920                                                        struct pipe_connect_state);
 921
 922         c->status = dcerpc_pipe_connect_ncacn_http_recv(ctx);
 923         if (!composite_is_ok(c)) return;
 924
 925         continue_pipe_connect(c, s);
 926 }
 927
 928
 929 /*
 930   Stage 3 of pipe_connect_b: Receive result of pipe connect request on unix socket
 931 */
 932 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx)
 933 {
 934         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 935                                                       struct composite_context);
 936         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 937                                                        struct pipe_connect_state);
 938
 939         c->status = dcerpc_pipe_connect_ncacn_unix_stream_recv(ctx);
 940         if (!composite_is_ok(c)) return;
 941
 942         continue_pipe_connect(c, s);
 943 }
 944
 945
 946 /*
 947   Stage 3 of pipe_connect_b: Receive result of pipe connect request on local rpc
 948 */
 949 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx)
 950 {
 951         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 952                                                       struct composite_context);
 953         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 954                                                        struct pipe_connect_state);
 955
 956         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 957         if (!composite_is_ok(c)) return;
 958
 959         continue_pipe_connect(c, s);
 960 }
 961
 962
 963 /*
 964   Stage 4 of pipe_connect_b: Start an authentication on connected dcerpc pipe
 965   depending on credentials and binding flags passed.
 966 */
 967 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s)
 968 {
 969         struct composite_context *auth_bind_req;
 970
 971         s->pipe->binding = dcerpc_binding_dup(s->pipe, s->binding);
 972         if (composite_nomem(s->pipe->binding, c)) {
 973                 return;
 974         }
 975
 976         auth_bind_req = dcerpc_pipe_auth_send(s->pipe, s->binding, s->table,
 977                                               s->credentials, s->lp_ctx);
 978         composite_continue(c, auth_bind_req, continue_pipe_auth, c);
 979 }
 980
 981
 982 /*
 983   Stage 5 of pipe_connect_b: Receive result of pipe authentication request
 984   and say if all went ok
 985 */
 986 static void continue_pipe_auth(struct composite_context *ctx)
 987 {
 988         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 989                                                       struct composite_context);
 990         struct pipe_connect_state *s = talloc_get_type(c->private_data, struct pipe_connect_state);
 991
 992         c->status = dcerpc_pipe_auth_recv(ctx, s, &s->pipe);
 993         if (!composite_is_ok(c)) return;
 994
 995         composite_done(c);
 996 }
 997
 998
 999 /*
1000   handle timeouts of a dcerpc connect
1001 */
1002 static void dcerpc_connect_timeout_handler(struct tevent_context *ev, struct tevent_timer *te,
1003                                            struct timeval t, void *private_data)
1004 {
1005         struct composite_context *c = talloc_get_type_abort(private_data,
1006                                                       struct composite_context);
1007         struct pipe_connect_state *s = talloc_get_type_abort(c->private_data, struct pipe_connect_state);
1008         if (!s->pipe->inhibit_timeout_processing) {
1009                 composite_error(c, NT_STATUS_IO_TIMEOUT);
1010         } else {
1011                 s->pipe->timed_out = true;
1012         }
1013 }
1014
1015 /*
1016   start a request to open a rpc connection to a rpc pipe, using
1017   specified binding structure to determine the endpoint and options
1018 */
1019 _PUBLIC_ struct composite_context* dcerpc_pipe_connect_b_send(TALLOC_CTX *parent_ctx,
1020                                                      const struct dcerpc_binding *binding,
1021                                                      const struct ndr_interface_table *table,
1022                                                      struct cli_credentials *credentials,
1023                                                      struct tevent_context *ev,
1024                                                      struct loadparm_context *lp_ctx)
1025 {
1026         struct composite_context *c;
1027         struct pipe_connect_state *s;
1028         enum dcerpc_transport_t transport;
1029         const char *endpoint = NULL;
1030         struct cli_credentials *epm_creds = NULL;
1031
1032         /* composite context allocation and setup */
1033         c = composite_create(parent_ctx, ev);
1034         if (c == NULL) {
1035                 return NULL;
1036         }
1037
1038         s = talloc_zero(c, struct pipe_connect_state);
1039         if (composite_nomem(s, c)) return c;
1040         c->private_data = s;
1041
1042         /* initialise dcerpc pipe structure */
1043         s->pipe = dcerpc_pipe_init(c, ev);
1044         if (composite_nomem(s->pipe, c)) return c;
1045
1046         if (DEBUGLEVEL >= 10)
1047                 s->pipe->conn->packet_log_dir = lpcfg_lock_directory(lp_ctx);
1048
1049         /* store parameters in state structure */
1050         s->binding      = dcerpc_binding_dup(s, binding);
1051         if (composite_nomem(s->binding, c)) return c;
1052         s->table        = table;
1053         s->credentials  = credentials;
1054         s->lp_ctx       = lp_ctx;
1055
1056         s->pipe->timed_out = false;
1057         s->pipe->inhibit_timeout_processing = false;
1058
1059         tevent_add_timer(c->event_ctx, c,
1060                          timeval_current_ofs(DCERPC_REQUEST_TIMEOUT, 0),
1061                          dcerpc_connect_timeout_handler, c);
1062
1063         transport = dcerpc_binding_get_transport(s->binding);
1064
1065         switch (transport) {
1066         case NCACN_NP:
1067         case NCACN_IP_TCP:
1068         case NCALRPC:
1069                 endpoint = dcerpc_binding_get_string_option(s->binding, "endpoint");
1070
1071                 /* anonymous credentials for rpc connection used to get endpoint mapping */
1072                 epm_creds = cli_credentials_init_anon(s);
1073                 if (composite_nomem(epm_creds, c)) return c;
1074
1075                 break;
1076         case NCACN_HTTP:
1077                 endpoint = dcerpc_binding_get_string_option(s->binding, "endpoint");
1078                 epm_creds = credentials;
1079                 break;
1080         default:
1081                 break;
1082         }
1083
1084         if (endpoint == NULL) {
1085                 struct composite_context *binding_req;
1086
1087                 binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
1088                                                           epm_creds,
1089                                                           s->pipe->conn->event_ctx,
1090                                                           s->lp_ctx);
1091                 composite_continue(c, binding_req, continue_map_binding, c);
1092                 return c;
1093         }
1094
1095         continue_connect(c, s);
1096         return c;
1097 }
1098
1099
1100 /*
1101   receive result of a request to open a rpc connection to a rpc pipe
1102 */
1103 _PUBLIC_ NTSTATUS dcerpc_pipe_connect_b_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
1104                                     struct dcerpc_pipe **p)
1105 {
1106         NTSTATUS status;
1107         struct pipe_connect_state *s;
1108
1109         status = composite_wait(c);
1110
1111         if (NT_STATUS_IS_OK(status)) {
1112                 s = talloc_get_type(c->private_data, struct pipe_connect_state);
1113                 talloc_steal(mem_ctx, s->pipe);
1114                 *p = s->pipe;
1115         }
1116         talloc_free(c);
1117         return status;
1118 }
1119
1120
1121 /*
1122   open a rpc connection to a rpc pipe, using the specified
1123   binding structure to determine the endpoint and options - sync version
1124 */
1125 _PUBLIC_ NTSTATUS dcerpc_pipe_connect_b(TALLOC_CTX *parent_ctx,
1126                                struct dcerpc_pipe **pp,
1127                                const struct dcerpc_binding *binding,
1128                                const struct ndr_interface_table *table,
1129                                struct cli_credentials *credentials,
1130                                struct tevent_context *ev,
1131                                struct loadparm_context *lp_ctx)
1132 {
1133         struct composite_context *c;
1134
1135         c = dcerpc_pipe_connect_b_send(parent_ctx, binding, table,
1136                                        credentials, ev, lp_ctx);
1137         return dcerpc_pipe_connect_b_recv(c, parent_ctx, pp);
1138 }
1139
1140
1141 struct pipe_conn_state {
1142         struct dcerpc_pipe *pipe;
1143 };
1144
1145
1146 static void continue_pipe_connect_b(struct composite_context *ctx);
1147
1148
1149 /*
1150   Initiate rpc connection to a rpc pipe, using the specified string
1151   binding to determine the endpoint and options.
1152   The string is to be parsed to a binding structure first.
1153 */
1154 _PUBLIC_ struct composite_context* dcerpc_pipe_connect_send(TALLOC_CTX *parent_ctx,
1155                                                    const char *binding,
1156                                                    const struct ndr_interface_table *table,
1157                                                    struct cli_credentials *credentials,
1158                                                    struct tevent_context *ev, struct loadparm_context *lp_ctx)
1159 {
1160         struct composite_context *c;
1161         struct pipe_conn_state *s;
1162         struct dcerpc_binding *b;
1163         struct composite_context *pipe_conn_req;
1164
1165         /* composite context allocation and setup */
1166         c = composite_create(parent_ctx, ev);
1167         if (c == NULL) {
1168                 return NULL;
1169         }
1170
1171         s = talloc_zero(c, struct pipe_conn_state);
1172         if (composite_nomem(s, c)) return c;
1173         c->private_data = s;
1174
1175         /* parse binding string to the structure */
1176         c->status = dcerpc_parse_binding(c, binding, &b);
1177         if (!NT_STATUS_IS_OK(c->status)) {
1178                 DEBUG(0, ("Failed to parse dcerpc binding '%s'\n", binding));
1179                 composite_error(c, c->status);
1180                 return c;
1181         }
1182
1183         DEBUG(3, ("Using binding %s\n", dcerpc_binding_string(c, b)));
1184
1185         /*
1186            start connecting to a rpc pipe after binding structure
1187            is established
1188          */
1189         pipe_conn_req = dcerpc_pipe_connect_b_send(c, b, table,
1190                                                    credentials, ev, lp_ctx);
1191         composite_continue(c, pipe_conn_req, continue_pipe_connect_b, c);
1192         return c;
1193 }
1194
1195
1196 /*
1197   Stage 2 of pipe_connect: Receive result of actual pipe connect request
1198   and say if we're done ok
1199 */
1200 static void continue_pipe_connect_b(struct composite_context *ctx)
1201 {
1202         struct composite_context *c = talloc_get_type(ctx->async.private_data,
1203                                                       struct composite_context);
1204         struct pipe_conn_state *s = talloc_get_type(c->private_data,
1205                                                     struct pipe_conn_state);
1206
1207         c->status = dcerpc_pipe_connect_b_recv(ctx, c, &s->pipe);
1208         talloc_steal(s, s->pipe);
1209         if (!composite_is_ok(c)) return;
1210
1211         composite_done(c);
1212 }
1213
1214
1215 /*
1216   Receive result of pipe connect (using binding string) request
1217   and return connected pipe structure.
1218 */
1219 NTSTATUS dcerpc_pipe_connect_recv(struct composite_context *c,
1220                                   TALLOC_CTX *mem_ctx,
1221                                   struct dcerpc_pipe **pp)
1222 {
1223         NTSTATUS status;
1224         struct pipe_conn_state *s;
1225
1226         status = composite_wait(c);
1227         if (NT_STATUS_IS_OK(status)) {
1228                 s = talloc_get_type(c->private_data, struct pipe_conn_state);
1229                 *pp = talloc_steal(mem_ctx, s->pipe);
1230         }
1231         talloc_free(c);
1232         return status;
1233 }
1234
1235
1236 /*
1237   Open a rpc connection to a rpc pipe, using the specified string
1238   binding to determine the endpoint and options - sync version
1239 */
1240 _PUBLIC_ NTSTATUS dcerpc_pipe_connect(TALLOC_CTX *parent_ctx,
1241                              struct dcerpc_pipe **pp,
1242                              const char *binding,
1243                              const struct ndr_interface_table *table,
1244                              struct cli_credentials *credentials,
1245                              struct tevent_context *ev,
1246                              struct loadparm_context *lp_ctx)
1247 {
1248         struct composite_context *c;
1249         c = dcerpc_pipe_connect_send(parent_ctx, binding,
1250                                      table, credentials, ev, lp_ctx);
1251         return dcerpc_pipe_connect_recv(c, parent_ctx, pp);
1252 }
1253