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 *target_hostname;
 426         const char *rpc_server;
 427         uint32_t rpc_server_port;
 428         char *rpc_proxy;
 429         uint32_t rpc_proxy_port;
 430         char *http_proxy;
 431         uint32_t http_proxy_port;
 432         bool use_tls;
 433         bool use_proxy;
 434         bool use_ntlm;
 435         struct loadparm_context *lp_ctx;
 436 };
 437
 438 /*
 439   Stage 2 of ncacn_http: rpc pipe opened (or not)
 440  */
 441 static void continue_pipe_open_ncacn_http(struct tevent_req *subreq)
 442 {
 443         struct composite_context *c = NULL;
 444         struct pipe_http_state *s = NULL;
 445         struct tstream_context *stream = NULL;
 446         struct tevent_queue *queue = NULL;
 447
 448         c = tevent_req_callback_data(subreq, struct composite_context);
 449         s = talloc_get_type(c->private_data, struct pipe_http_state);
 450
 451         /* receive result of RoH connect request */
 452         c->status = dcerpc_pipe_open_roh_recv(subreq, s->io.conn,
 453                                               &stream, &queue);
 454         TALLOC_FREE(subreq);
 455         if (!composite_is_ok(c)) return;
 456
 457         s->io.conn->transport.transport = NCACN_HTTP;
 458         s->io.conn->transport.stream = stream;
 459         s->io.conn->transport.write_queue = queue;
 460         s->io.conn->transport.pending_reads = 0;
 461         s->io.conn->server_name = strupper_talloc(s->io.conn,
 462                                                   s->target_hostname);
 463
 464         composite_done(c);
 465 }
 466
 467 /*
 468   Initiate async open of a rpc connection to a rpc pipe using HTTP transport,
 469   and using the binding structure to determine the endpoint and options
 470 */
 471 static struct composite_context* dcerpc_pipe_connect_ncacn_http_send(
 472                 TALLOC_CTX *mem_ctx, struct dcerpc_pipe_connect *io,
 473                 struct loadparm_context *lp_ctx)
 474 {
 475         struct composite_context *c;
 476         struct pipe_http_state *s;
 477         struct tevent_req *subreq;
 478         const char *endpoint;
 479         const char *use_proxy;
 480         char *proxy;
 481         char *port;
 482         const char *opt;
 483
 484         /* composite context allocation and setup */
 485         c = composite_create(mem_ctx, io->conn->event_ctx);
 486         if (c == NULL) return NULL;
 487
 488         s = talloc_zero(c, struct pipe_http_state);
 489         if (composite_nomem(s, c)) return c;
 490         c->private_data = s;
 491
 492         /* store input parameters in state structure */
 493         s->lp_ctx       = lp_ctx;
 494         s->io           = *io;
 495         s->localaddr    = dcerpc_binding_get_string_option(io->binding,
 496                                                         "localaddress");
 497         /* RPC server and port (the endpoint) */
 498         s->rpc_server = dcerpc_binding_get_string_option(io->binding, "host");
 499         s->target_hostname = dcerpc_binding_get_string_option(io->binding,
 500                                                               "target_hostname");
 501         endpoint = dcerpc_binding_get_string_option(io->binding, "endpoint");
 502         if (endpoint == NULL) {
 503                 composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 504                 return c;
 505         }
 506         s->rpc_server_port = atoi(endpoint);
 507         if (s->rpc_server_port == 0) {
 508                 composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 509                 return c;
 510         }
 511
 512         /* Use TLS */
 513         opt = dcerpc_binding_get_string_option(io->binding, "HttpUseTls");
 514         if (opt) {
 515                 if (strcasecmp(opt, "true") == 0) {
 516                         s->use_tls = true;
 517                 } else if (strcasecmp(opt, "false") == 0) {
 518                         s->use_tls = false;
 519                 } else {
 520                         composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 521                         return c;
 522                 }
 523         } else {
 524                 s->use_tls = true;
 525         }
 526
 527         /* RPC Proxy */
 528         proxy = port = talloc_strdup(s, dcerpc_binding_get_string_option(
 529                         io->binding, "RpcProxy"));
 530         s->rpc_proxy  = strsep(&port, ":");
 531         if (proxy && port) {
 532                 s->rpc_proxy_port = atoi(port);
 533         } else {
 534                 s->rpc_proxy_port = s->use_tls ? 443 : 80;
 535         }
 536         if (s->rpc_proxy == NULL) {
 537                 s->rpc_proxy = talloc_strdup(s, s->rpc_server);
 538                 if (composite_nomem(s->rpc_proxy, c)) return c;
 539         }
 540
 541         /* HTTP Proxy */
 542         proxy = port = talloc_strdup(s, dcerpc_binding_get_string_option(
 543                         io->binding, "HttpProxy"));
 544         s->http_proxy = strsep(&port, ":");
 545         if (proxy && port) {
 546                 s->http_proxy_port = atoi(port);
 547         } else {
 548                 s->http_proxy_port = s->use_tls ? 443 : 80;
 549         }
 550
 551         /* Use local proxy */
 552         use_proxy = dcerpc_binding_get_string_option(io->binding,
 553                                                  "HttpConnectOption");
 554         if (use_proxy && strcasecmp(use_proxy, "UseHttpProxy")) {
 555                 s->use_proxy = true;
 556         }
 557
 558         /* If use local proxy set, the http proxy should be provided */
 559         if (s->use_proxy && !s->http_proxy) {
 560                 composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 561                 return c;
 562         }
 563
 564         /* Check which HTTP authentication method to use */
 565         opt = dcerpc_binding_get_string_option(io->binding, "HttpAuthOption");
 566         if (opt) {
 567                 if (strcasecmp(opt, "basic") == 0) {
 568                         s->use_ntlm = false;
 569                 } else if (strcasecmp(opt, "ntlm") == 0) {
 570                         s->use_ntlm = true;
 571                 } else {
 572                         composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 573                         return c;
 574                 }
 575         } else {
 576                 s->use_ntlm = true;
 577         }
 578
 579         subreq = dcerpc_pipe_open_roh_send(s->io.conn, s->localaddr,
 580                                            s->rpc_server, s->rpc_server_port,
 581                                            s->rpc_proxy, s->rpc_proxy_port,
 582                                            s->http_proxy, s->http_proxy_port,
 583                                            s->use_tls, s->use_proxy,
 584                                            s->io.creds, io->resolve_ctx,
 585                                            s->lp_ctx, s->use_ntlm);
 586         if (composite_nomem(subreq, c)) return c;
 587
 588         tevent_req_set_callback(subreq, continue_pipe_open_ncacn_http, c);
 589         return c;
 590 }
 591
 592 static NTSTATUS dcerpc_pipe_connect_ncacn_http_recv(struct composite_context *c)
 593 {
 594         return composite_wait_free(c);
 595 }
 596
 597
 598 struct pipe_unix_state {
 599         struct dcerpc_pipe_connect io;
 600         const char *path;
 601 };
 602
 603
 604 /*
 605   Stage 2 of ncacn_unix: rpc pipe opened (or not)
 606 */
 607 static void continue_pipe_open_ncacn_unix_stream(struct composite_context *ctx)
 608 {
 609         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 610                                                       struct composite_context);
 611
 612         /* receive result of pipe open request on unix socket */
 613         c->status = dcerpc_pipe_open_unix_stream_recv(ctx);
 614         if (!composite_is_ok(c)) return;
 615
 616         composite_done(c);
 617 }
 618
 619
 620 /*
 621   Initiate async open of a rpc connection to a rpc pipe on unix socket using
 622   the binding structure to determine the endpoint and options
 623 */
 624 static struct composite_context* dcerpc_pipe_connect_ncacn_unix_stream_send(TALLOC_CTX *mem_ctx,
 625                                                                             struct dcerpc_pipe_connect *io)
 626 {
 627         struct composite_context *c;
 628         struct pipe_unix_state *s;
 629         struct composite_context *pipe_req;
 630
 631         /* composite context allocation and setup */
 632         c = composite_create(mem_ctx, io->conn->event_ctx);
 633         if (c == NULL) return NULL;
 634
 635         s = talloc_zero(c, struct pipe_unix_state);
 636         if (composite_nomem(s, c)) return c;
 637         c->private_data = s;
 638
 639         /* prepare pipe open parameters and store them in state structure
 640            also, verify whether biding endpoint is not null */
 641         s->io = *io;
 642
 643         s->path = dcerpc_binding_get_string_option(io->binding, "endpoint");
 644         if (s->path == NULL) {
 645                 composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 646                 return c;
 647         }
 648
 649         /* send pipe open request on unix socket */
 650         pipe_req = dcerpc_pipe_open_unix_stream_send(s->io.conn, s->path);
 651         composite_continue(c, pipe_req, continue_pipe_open_ncacn_unix_stream, c);
 652         return c;
 653 }
 654
 655
 656 /*
 657   Receive result of a rpc connection to a pipe on unix socket
 658 */
 659 static NTSTATUS dcerpc_pipe_connect_ncacn_unix_stream_recv(struct composite_context *c)
 660 {
 661         NTSTATUS status = composite_wait(c);
 662
 663         talloc_free(c);
 664         return status;
 665 }
 666
 667
 668 struct pipe_ncalrpc_state {
 669         struct dcerpc_pipe_connect io;
 670 };
 671
 672 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c);
 673
 674 /*
 675   Stage 2 of ncalrpc: rpc pipe opened (or not)
 676 */
 677 static void continue_pipe_open_ncalrpc(struct composite_context *ctx)
 678 {
 679         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 680                                                       struct composite_context);
 681
 682         /* receive result of pipe open request on ncalrpc */
 683         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 684         if (!composite_is_ok(c)) return;
 685
 686         composite_done(c);
 687 }
 688
 689
 690 /*
 691    Initiate async open of a rpc connection request on NCALRPC using
 692    the binding structure to determine the endpoint and options
 693 */
 694 static struct composite_context* dcerpc_pipe_connect_ncalrpc_send(TALLOC_CTX *mem_ctx,
 695                                                                   struct dcerpc_pipe_connect *io)
 696 {
 697         struct composite_context *c;
 698         struct pipe_ncalrpc_state *s;
 699         struct composite_context *pipe_req;
 700         const char *endpoint;
 701
 702         /* composite context allocation and setup */
 703         c = composite_create(mem_ctx, io->conn->event_ctx);
 704         if (c == NULL) return NULL;
 705
 706         s = talloc_zero(c, struct pipe_ncalrpc_state);
 707         if (composite_nomem(s, c)) return c;
 708         c->private_data = s;
 709
 710         /* store input parameters in state structure */
 711         s->io  = *io;
 712
 713         endpoint = dcerpc_binding_get_string_option(io->binding, "endpoint");
 714         if (endpoint == NULL) {
 715                 composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 716                 return c;
 717         }
 718
 719         /* send pipe open request */
 720         pipe_req = dcerpc_pipe_open_pipe_send(s->io.conn,
 721                                               s->io.ncalrpc.dir,
 722                                               endpoint);
 723         composite_continue(c, pipe_req, continue_pipe_open_ncalrpc, c);
 724         return c;
 725 }
 726
 727
 728 /*
 729   Receive result of a rpc connection to a rpc pipe on NCALRPC
 730 */
 731 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c)
 732 {
 733         NTSTATUS status = composite_wait(c);
 734
 735         talloc_free(c);
 736         return status;
 737 }
 738
 739
 740 struct pipe_connect_state {
 741         struct dcerpc_pipe *pipe;
 742         struct dcerpc_binding *binding;
 743         const struct ndr_interface_table *table;
 744         struct cli_credentials *credentials;
 745         struct loadparm_context *lp_ctx;
 746 };
 747
 748
 749 static void continue_map_binding(struct composite_context *ctx);
 750 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s);
 751 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx);
 752 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx);
 753 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx);
 754 static void continue_pipe_connect_ncacn_http(struct composite_context *ctx);
 755 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx);
 756 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx);
 757 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s);
 758 static void continue_pipe_auth(struct composite_context *ctx);
 759
 760
 761 /*
 762   Stage 2 of pipe_connect_b: Receive result of endpoint mapping
 763 */
 764 static void continue_map_binding(struct composite_context *ctx)
 765 {
 766         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 767                                                       struct composite_context);
 768         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 769                                                        struct pipe_connect_state);
 770         const char *endpoint;
 771
 772         c->status = dcerpc_epm_map_binding_recv(ctx);
 773         if (!composite_is_ok(c)) return;
 774
 775         endpoint = dcerpc_binding_get_string_option(s->binding, "endpoint");
 776         DEBUG(4,("Mapped to DCERPC endpoint %s\n", endpoint));
 777
 778         continue_connect(c, s);
 779 }
 780
 781
 782 /*
 783   Stage 2 of pipe_connect_b: Continue connection after endpoint is known
 784 */
 785 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s)
 786 {
 787         struct dcerpc_pipe_connect pc;
 788
 789         /* potential exits to another stage by sending an async request */
 790         struct composite_context *ncacn_np_smb2_req;
 791         struct composite_context *ncacn_np_smb_req;
 792         struct composite_context *ncacn_ip_tcp_req;
 793         struct composite_context *ncacn_http_req;
 794         struct composite_context *ncacn_unix_req;
 795         struct composite_context *ncalrpc_req;
 796         enum dcerpc_transport_t transport;
 797         enum protocol_types min_ipc_protocol;
 798         uint32_t flags;
 799
 800         /* dcerpc pipe connect input parameters */
 801         ZERO_STRUCT(pc);
 802         pc.conn         = s->pipe->conn;
 803         pc.binding      = s->binding;
 804         pc.interface    = s->table;
 805         pc.creds        = s->credentials;
 806         pc.resolve_ctx  = lpcfg_resolve_context(s->lp_ctx);
 807
 808         transport = dcerpc_binding_get_transport(s->binding);
 809         flags = dcerpc_binding_get_flags(s->binding);
 810
 811         min_ipc_protocol = lpcfg_client_ipc_min_protocol(s->lp_ctx);
 812         if (min_ipc_protocol >= PROTOCOL_SMB2_02) {
 813                 flags |= DCERPC_SMB2;
 814         }
 815
 816         /* connect dcerpc pipe depending on required transport */
 817         switch (transport) {
 818         case NCACN_NP:
 819                 if (flags & DCERPC_SMB2) {
 820                         /* new varient of SMB a.k.a. SMB2 */
 821                         ncacn_np_smb2_req = dcerpc_pipe_connect_ncacn_np_smb2_send(c, &pc, s->lp_ctx);
 822                         composite_continue(c, ncacn_np_smb2_req, continue_pipe_connect_ncacn_np_smb2, c);
 823                         return;
 824
 825                 } else {
 826                         /* good old ordinary SMB */
 827                         ncacn_np_smb_req = dcerpc_pipe_connect_ncacn_np_smb_send(c, &pc, s->lp_ctx);
 828                         composite_continue(c, ncacn_np_smb_req, continue_pipe_connect_ncacn_np_smb, c);
 829                         return;
 830                 }
 831                 break;
 832
 833         case NCACN_IP_TCP:
 834                 ncacn_ip_tcp_req = dcerpc_pipe_connect_ncacn_ip_tcp_send(c, &pc);
 835                 composite_continue(c, ncacn_ip_tcp_req, continue_pipe_connect_ncacn_ip_tcp, c);
 836                 return;
 837
 838         case NCACN_HTTP:
 839                 ncacn_http_req = dcerpc_pipe_connect_ncacn_http_send(c, &pc, s->lp_ctx);
 840                 composite_continue(c, ncacn_http_req, continue_pipe_connect_ncacn_http, c);
 841                 return;
 842
 843         case NCACN_UNIX_STREAM:
 844                 ncacn_unix_req = dcerpc_pipe_connect_ncacn_unix_stream_send(c, &pc);
 845                 composite_continue(c, ncacn_unix_req, continue_pipe_connect_ncacn_unix, c);
 846                 return;
 847
 848         case NCALRPC:
 849                 pc.ncalrpc.dir = lpcfg_ncalrpc_dir(s->lp_ctx);
 850                 c->status = dcerpc_binding_set_string_option(s->binding, "ncalrpc_dir",
 851                                                              pc.ncalrpc.dir);
 852                 if (!composite_is_ok(c)) return;
 853                 ncalrpc_req = dcerpc_pipe_connect_ncalrpc_send(c, &pc);
 854                 composite_continue(c, ncalrpc_req, continue_pipe_connect_ncalrpc, c);
 855                 return;
 856
 857         default:
 858                 /* looks like a transport we don't support now */
 859                 composite_error(c, NT_STATUS_NOT_SUPPORTED);
 860         }
 861 }
 862
 863
 864 /*
 865   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 866   named pipe on smb2
 867 */
 868 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx)
 869 {
 870         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 871                                                       struct composite_context);
 872         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 873                                                        struct pipe_connect_state);
 874
 875         c->status = dcerpc_pipe_connect_ncacn_np_smb2_recv(ctx);
 876         if (!composite_is_ok(c)) return;
 877
 878         continue_pipe_connect(c, s);
 879 }
 880
 881
 882 /*
 883   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 884   named pipe on smb
 885 */
 886 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx)
 887 {
 888         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 889                                                       struct composite_context);
 890         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 891                                                        struct pipe_connect_state);
 892
 893         c->status = dcerpc_pipe_connect_ncacn_np_smb_recv(ctx);
 894         if (!composite_is_ok(c)) return;
 895
 896         continue_pipe_connect(c, s);
 897 }
 898
 899
 900 /*
 901   Stage 3 of pipe_connect_b: Receive result of pipe connect request on tcp/ip
 902 */
 903 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx)
 904 {
 905         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 906                                                       struct composite_context);
 907         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 908                                                        struct pipe_connect_state);
 909
 910         c->status = dcerpc_pipe_connect_ncacn_ip_tcp_recv(ctx);
 911         if (!composite_is_ok(c)) return;
 912
 913         continue_pipe_connect(c, s);
 914 }
 915
 916
 917 /*
 918   Stage 3 of pipe_connect_b: Receive result of pipe connect request on http
 919 */
 920 static void continue_pipe_connect_ncacn_http(struct composite_context *ctx)
 921 {
 922         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 923                                                       struct composite_context);
 924         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 925                                                        struct pipe_connect_state);
 926
 927         c->status = dcerpc_pipe_connect_ncacn_http_recv(ctx);
 928         if (!composite_is_ok(c)) return;
 929
 930         continue_pipe_connect(c, s);
 931 }
 932
 933
 934 /*
 935   Stage 3 of pipe_connect_b: Receive result of pipe connect request on unix socket
 936 */
 937 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx)
 938 {
 939         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 940                                                       struct composite_context);
 941         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 942                                                        struct pipe_connect_state);
 943
 944         c->status = dcerpc_pipe_connect_ncacn_unix_stream_recv(ctx);
 945         if (!composite_is_ok(c)) return;
 946
 947         continue_pipe_connect(c, s);
 948 }
 949
 950
 951 /*
 952   Stage 3 of pipe_connect_b: Receive result of pipe connect request on local rpc
 953 */
 954 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx)
 955 {
 956         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 957                                                       struct composite_context);
 958         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 959                                                        struct pipe_connect_state);
 960
 961         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 962         if (!composite_is_ok(c)) return;
 963
 964         continue_pipe_connect(c, s);
 965 }
 966
 967
 968 /*
 969   Stage 4 of pipe_connect_b: Start an authentication on connected dcerpc pipe
 970   depending on credentials and binding flags passed.
 971 */
 972 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s)
 973 {
 974         struct composite_context *auth_bind_req;
 975
 976         s->pipe->binding = dcerpc_binding_dup(s->pipe, s->binding);
 977         if (composite_nomem(s->pipe->binding, c)) {
 978                 return;
 979         }
 980
 981         auth_bind_req = dcerpc_pipe_auth_send(s->pipe, s->binding, s->table,
 982                                               s->credentials, s->lp_ctx);
 983         composite_continue(c, auth_bind_req, continue_pipe_auth, c);
 984 }
 985
 986
 987 /*
 988   Stage 5 of pipe_connect_b: Receive result of pipe authentication request
 989   and say if all went ok
 990 */
 991 static void continue_pipe_auth(struct composite_context *ctx)
 992 {
 993         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 994                                                       struct composite_context);
 995         struct pipe_connect_state *s = talloc_get_type(c->private_data, struct pipe_connect_state);
 996
 997         c->status = dcerpc_pipe_auth_recv(ctx, s, &s->pipe);
 998         if (!composite_is_ok(c)) return;
 999
1000         composite_done(c);
1001 }
1002
1003
1004 /*
1005   handle timeouts of a dcerpc connect
1006 */
1007 static void dcerpc_connect_timeout_handler(struct tevent_context *ev, struct tevent_timer *te,
1008                                            struct timeval t, void *private_data)
1009 {
1010         struct composite_context *c = talloc_get_type_abort(private_data,
1011                                                       struct composite_context);
1012         struct pipe_connect_state *s = talloc_get_type_abort(c->private_data, struct pipe_connect_state);
1013         if (!s->pipe->inhibit_timeout_processing) {
1014                 composite_error(c, NT_STATUS_IO_TIMEOUT);
1015         } else {
1016                 s->pipe->timed_out = true;
1017         }
1018 }
1019
1020 /*
1021   start a request to open a rpc connection to a rpc pipe, using
1022   specified binding structure to determine the endpoint and options
1023 */
1024 _PUBLIC_ struct composite_context* dcerpc_pipe_connect_b_send(TALLOC_CTX *parent_ctx,
1025                                                      const struct dcerpc_binding *binding,
1026                                                      const struct ndr_interface_table *table,
1027                                                      struct cli_credentials *credentials,
1028                                                      struct tevent_context *ev,
1029                                                      struct loadparm_context *lp_ctx)
1030 {
1031         struct composite_context *c;
1032         struct pipe_connect_state *s;
1033         enum dcerpc_transport_t transport;
1034         const char *endpoint = NULL;
1035         struct cli_credentials *epm_creds = NULL;
1036
1037         /* composite context allocation and setup */
1038         c = composite_create(parent_ctx, ev);
1039         if (c == NULL) {
1040                 return NULL;
1041         }
1042
1043         s = talloc_zero(c, struct pipe_connect_state);
1044         if (composite_nomem(s, c)) return c;
1045         c->private_data = s;
1046
1047         /* initialise dcerpc pipe structure */
1048         s->pipe = dcerpc_pipe_init(c, ev);
1049         if (composite_nomem(s->pipe, c)) return c;
1050
1051         if (DEBUGLEVEL >= 10)
1052                 s->pipe->conn->packet_log_dir = lpcfg_lock_directory(lp_ctx);
1053
1054         /* store parameters in state structure */
1055         s->binding      = dcerpc_binding_dup(s, binding);
1056         if (composite_nomem(s->binding, c)) return c;
1057         s->table        = table;
1058         s->credentials  = credentials;
1059         s->lp_ctx       = lp_ctx;
1060
1061         s->pipe->timed_out = false;
1062         s->pipe->inhibit_timeout_processing = false;
1063
1064         tevent_add_timer(c->event_ctx, c,
1065                          timeval_current_ofs(DCERPC_REQUEST_TIMEOUT, 0),
1066                          dcerpc_connect_timeout_handler, c);
1067
1068         transport = dcerpc_binding_get_transport(s->binding);
1069
1070         switch (transport) {
1071         case NCACN_NP:
1072         case NCACN_IP_TCP:
1073         case NCALRPC:
1074                 endpoint = dcerpc_binding_get_string_option(s->binding, "endpoint");
1075
1076                 /* anonymous credentials for rpc connection used to get endpoint mapping */
1077                 epm_creds = cli_credentials_init_anon(s);
1078                 if (composite_nomem(epm_creds, c)) return c;
1079
1080                 break;
1081         case NCACN_HTTP:
1082                 endpoint = dcerpc_binding_get_string_option(s->binding, "endpoint");
1083                 epm_creds = credentials;
1084                 break;
1085         default:
1086                 break;
1087         }
1088
1089         if (endpoint == NULL) {
1090                 struct composite_context *binding_req;
1091
1092                 binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
1093                                                           epm_creds,
1094                                                           s->pipe->conn->event_ctx,
1095                                                           s->lp_ctx);
1096                 composite_continue(c, binding_req, continue_map_binding, c);
1097                 return c;
1098         }
1099
1100         continue_connect(c, s);
1101         return c;
1102 }
1103
1104
1105 /*
1106   receive result of a request to open a rpc connection to a rpc pipe
1107 */
1108 _PUBLIC_ NTSTATUS dcerpc_pipe_connect_b_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
1109                                     struct dcerpc_pipe **p)
1110 {
1111         NTSTATUS status;
1112         struct pipe_connect_state *s;
1113
1114         status = composite_wait(c);
1115
1116         if (NT_STATUS_IS_OK(status)) {
1117                 s = talloc_get_type(c->private_data, struct pipe_connect_state);
1118                 talloc_steal(mem_ctx, s->pipe);
1119                 *p = s->pipe;
1120         }
1121         talloc_free(c);
1122         return status;
1123 }
1124
1125
1126 /*
1127   open a rpc connection to a rpc pipe, using the specified
1128   binding structure to determine the endpoint and options - sync version
1129 */
1130 _PUBLIC_ NTSTATUS dcerpc_pipe_connect_b(TALLOC_CTX *parent_ctx,
1131                                struct dcerpc_pipe **pp,
1132                                const struct dcerpc_binding *binding,
1133                                const struct ndr_interface_table *table,
1134                                struct cli_credentials *credentials,
1135                                struct tevent_context *ev,
1136                                struct loadparm_context *lp_ctx)
1137 {
1138         struct composite_context *c;
1139
1140         c = dcerpc_pipe_connect_b_send(parent_ctx, binding, table,
1141                                        credentials, ev, lp_ctx);
1142         return dcerpc_pipe_connect_b_recv(c, parent_ctx, pp);
1143 }
1144
1145
1146 struct pipe_conn_state {
1147         struct dcerpc_pipe *pipe;
1148 };
1149
1150
1151 static void continue_pipe_connect_b(struct composite_context *ctx);
1152
1153
1154 /*
1155   Initiate rpc connection to a rpc pipe, using the specified string
1156   binding to determine the endpoint and options.
1157   The string is to be parsed to a binding structure first.
1158 */
1159 _PUBLIC_ struct composite_context* dcerpc_pipe_connect_send(TALLOC_CTX *parent_ctx,
1160                                                    const char *binding,
1161                                                    const struct ndr_interface_table *table,
1162                                                    struct cli_credentials *credentials,
1163                                                    struct tevent_context *ev, struct loadparm_context *lp_ctx)
1164 {
1165         struct composite_context *c;
1166         struct pipe_conn_state *s;
1167         struct dcerpc_binding *b;
1168         struct composite_context *pipe_conn_req;
1169
1170         /* composite context allocation and setup */
1171         c = composite_create(parent_ctx, ev);
1172         if (c == NULL) {
1173                 return NULL;
1174         }
1175
1176         s = talloc_zero(c, struct pipe_conn_state);
1177         if (composite_nomem(s, c)) return c;
1178         c->private_data = s;
1179
1180         /* parse binding string to the structure */
1181         c->status = dcerpc_parse_binding(c, binding, &b);
1182         if (!NT_STATUS_IS_OK(c->status)) {
1183                 DEBUG(0, ("Failed to parse dcerpc binding '%s'\n", binding));
1184                 composite_error(c, c->status);
1185                 return c;
1186         }
1187
1188         DEBUG(3, ("Using binding %s\n", dcerpc_binding_string(c, b)));
1189
1190         /*
1191            start connecting to a rpc pipe after binding structure
1192            is established
1193          */
1194         pipe_conn_req = dcerpc_pipe_connect_b_send(c, b, table,
1195                                                    credentials, ev, lp_ctx);
1196         composite_continue(c, pipe_conn_req, continue_pipe_connect_b, c);
1197         return c;
1198 }
1199
1200
1201 /*
1202   Stage 2 of pipe_connect: Receive result of actual pipe connect request
1203   and say if we're done ok
1204 */
1205 static void continue_pipe_connect_b(struct composite_context *ctx)
1206 {
1207         struct composite_context *c = talloc_get_type(ctx->async.private_data,
1208                                                       struct composite_context);
1209         struct pipe_conn_state *s = talloc_get_type(c->private_data,
1210                                                     struct pipe_conn_state);
1211
1212         c->status = dcerpc_pipe_connect_b_recv(ctx, c, &s->pipe);
1213         talloc_steal(s, s->pipe);
1214         if (!composite_is_ok(c)) return;
1215
1216         composite_done(c);
1217 }
1218
1219
1220 /*
1221   Receive result of pipe connect (using binding string) request
1222   and return connected pipe structure.
1223 */
1224 NTSTATUS dcerpc_pipe_connect_recv(struct composite_context *c,
1225                                   TALLOC_CTX *mem_ctx,
1226                                   struct dcerpc_pipe **pp)
1227 {
1228         NTSTATUS status;
1229         struct pipe_conn_state *s;
1230
1231         status = composite_wait(c);
1232         if (NT_STATUS_IS_OK(status)) {
1233                 s = talloc_get_type(c->private_data, struct pipe_conn_state);
1234                 *pp = talloc_steal(mem_ctx, s->pipe);
1235         }
1236         talloc_free(c);
1237         return status;
1238 }
1239
1240
1241 /*
1242   Open a rpc connection to a rpc pipe, using the specified string
1243   binding to determine the endpoint and options - sync version
1244 */
1245 _PUBLIC_ NTSTATUS dcerpc_pipe_connect(TALLOC_CTX *parent_ctx,
1246                              struct dcerpc_pipe **pp,
1247                              const char *binding,
1248                              const struct ndr_interface_table *table,
1249                              struct cli_credentials *credentials,
1250                              struct tevent_context *ev,
1251                              struct loadparm_context *lp_ctx)
1252 {
1253         struct composite_context *c;
1254         c = dcerpc_pipe_connect_send(parent_ctx, binding,
1255                                      table, credentials, ev, lp_ctx);
1256         return dcerpc_pipe_connect_recv(c, parent_ctx, pp);
1257 }
1258