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 #include "libcli/http/http.h"
  39 #include "lib/util/util_net.h"
  40
  41 #undef strcasecmp
  42
  43 struct dcerpc_pipe_connect {
  44         struct dcecli_connection *conn;
  45         struct dcerpc_binding *binding;
  46         const struct ndr_interface_table *interface;
  47         struct cli_credentials *creds;
  48         struct resolve_context *resolve_ctx;
  49         struct {
  50                 const char *dir;
  51         } ncalrpc;
  52         struct {
  53                 struct smbXcli_conn *conn;
  54                 struct smbXcli_session *session;
  55                 struct smbXcli_tcon *tcon;
  56                 const char *pipe_name;
  57         } smb;
  58 };
  59
  60 struct pipe_np_smb_state {
  61         struct smb_composite_connect conn;
  62         struct dcerpc_pipe_connect io;
  63 };
  64
  65
  66 /*
  67   Stage 3 of ncacn_np_smb: Named pipe opened (or not)
  68 */
  69 static void continue_pipe_open_smb(struct composite_context *ctx)
  70 {
  71         struct composite_context *c = talloc_get_type(ctx->async.private_data,
  72                                                       struct composite_context);
  73
  74         /* receive result of named pipe open request on smb */
  75         c->status = dcerpc_pipe_open_smb_recv(ctx);
  76         if (!composite_is_ok(c)) return;
  77
  78         composite_done(c);
  79 }
  80
  81 static void continue_smb_open(struct composite_context *c);
  82 static void continue_smb2_connect(struct tevent_req *subreq);
  83 static void continue_smbXcli_connect(struct tevent_req *subreq);
  84
  85 /*
  86   Stage 2 of ncacn_np_smb: Open a named pipe after successful smb connection
  87 */
  88 static void continue_smb_connect(struct composite_context *ctx)
  89 {
  90         struct composite_context *c = talloc_get_type(ctx->async.private_data,
  91                                                       struct composite_context);
  92         struct pipe_np_smb_state *s = talloc_get_type(c->private_data,
  93                                                       struct pipe_np_smb_state);
  94         struct smbcli_tree *t;
  95
  96         /* receive result of smb connect request */
  97         c->status = smb_composite_connect_recv(ctx, s->io.conn);
  98         if (!composite_is_ok(c)) return;
  99
 100         t = s->conn.out.tree;
 101
 102         /* prepare named pipe open parameters */
 103         s->io.smb.conn = t->session->transport->conn;
 104         s->io.smb.session = t->session->smbXcli;
 105         s->io.smb.tcon = t->smbXcli;
 106         smb1cli_tcon_set_id(s->io.smb.tcon, t->tid);
 107         s->io.smb.pipe_name = dcerpc_binding_get_string_option(s->io.binding,
 108                                                                "endpoint");
 109
 110         continue_smb_open(c);
 111 }
 112
 113 static void continue_smb_open(struct composite_context *c)
 114 {
 115         struct pipe_np_smb_state *s = talloc_get_type(c->private_data,
 116                                                       struct pipe_np_smb_state);
 117         struct composite_context *open_ctx;
 118
 119         /* send named pipe open request */
 120         open_ctx = dcerpc_pipe_open_smb_send(s->io.conn,
 121                                              s->io.smb.conn,
 122                                              s->io.smb.session,
 123                                              s->io.smb.tcon,
 124                                              DCERPC_REQUEST_TIMEOUT * 1000,
 125                                              s->io.smb.pipe_name);
 126         if (composite_nomem(open_ctx, c)) return;
 127
 128         composite_continue(c, open_ctx, continue_pipe_open_smb, c);
 129 }
 130
 131
 132 /*
 133   Initiate async open of a rpc connection to a rpc pipe on SMB using
 134   the binding structure to determine the endpoint and options
 135 */
 136 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)
 137 {
 138         struct composite_context *c;
 139         struct pipe_np_smb_state *s;
 140         struct tevent_req *subreq = NULL;
 141         struct smb_composite_connect *conn;
 142         uint32_t flags;
 143         const char *target_hostname = NULL;
 144         const char *dest_address = NULL;
 145         const char *calling_name = NULL;
 146
 147         /* composite context allocation and setup */
 148         c = composite_create(mem_ctx, io->conn->event_ctx);
 149         if (c == NULL) return NULL;
 150
 151         s = talloc_zero(c, struct pipe_np_smb_state);
 152         if (composite_nomem(s, c)) return c;
 153         c->private_data = s;
 154
 155         s->io  = *io;
 156         conn   = &s->conn;
 157
 158         if (smbXcli_conn_is_connected(s->io.smb.conn)) {
 159                 continue_smb_open(c);
 160                 return c;
 161         }
 162
 163         if (s->io.creds == NULL) {
 164                 composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 165                 return c;
 166         }
 167
 168         /* prepare smb connection parameters: we're connecting to IPC$ share on
 169            remote rpc server */
 170         target_hostname = dcerpc_binding_get_string_option(s->io.binding, "target_hostname");
 171         conn->in.dest_host = dcerpc_binding_get_string_option(s->io.binding, "host");
 172         conn->in.dest_ports = lpcfg_smb_ports(lp_ctx);
 173         conn->in.called_name = target_hostname;
 174         if (conn->in.called_name == NULL) {
 175                 conn->in.called_name = "*SMBSERVER";
 176         }
 177         conn->in.socket_options         = lpcfg_socket_options(lp_ctx);
 178         conn->in.service                = "IPC$";
 179         conn->in.service_type           = NULL;
 180         conn->in.workgroup              = lpcfg_workgroup(lp_ctx);
 181         conn->in.gensec_settings = lpcfg_gensec_settings(conn, lp_ctx);
 182
 183         lpcfg_smbcli_options(lp_ctx, &conn->in.options);
 184         lpcfg_smbcli_session_options(lp_ctx, &conn->in.session_options);
 185
 186         /*
 187          * provide proper credentials - user supplied, but allow a
 188          * fallback to anonymous if this is an schannel connection
 189          * (might be NT4 not allowing machine logins at session
 190          * setup) or if asked to do so by the caller (perhaps a SAMR password change?)
 191          */
 192         s->conn.in.credentials = s->io.creds;
 193         flags = dcerpc_binding_get_flags(s->io.binding);
 194         if (flags & (DCERPC_SCHANNEL|DCERPC_ANON_FALLBACK)) {
 195                 conn->in.fallback_to_anonymous  = true;
 196         } else {
 197                 conn->in.fallback_to_anonymous  = false;
 198         }
 199
 200         conn->in.options.min_protocol = lpcfg_client_ipc_min_protocol(lp_ctx);
 201         conn->in.options.max_protocol = lpcfg_client_ipc_max_protocol(lp_ctx);
 202         if ((flags & DCERPC_SMB1) && (flags & DCERPC_SMB2)) {
 203                 /* auto */
 204         } else if (flags & DCERPC_SMB2) {
 205                 if (conn->in.options.min_protocol < PROTOCOL_SMB2_02) {
 206                         conn->in.options.min_protocol = PROTOCOL_SMB2_02;
 207                 }
 208                 if (conn->in.options.max_protocol < PROTOCOL_SMB2_02) {
 209                         conn->in.options.max_protocol = PROTOCOL_LATEST;
 210                 }
 211         } else if (flags & DCERPC_SMB1) {
 212                 conn->in.options.min_protocol = PROTOCOL_NT1;
 213                 conn->in.options.max_protocol = PROTOCOL_NT1;
 214         } else {
 215                 /* auto */
 216         }
 217
 218         conn->in.options.signing = lpcfg_client_ipc_signing(lp_ctx);
 219
 220         if (s->conn.in.credentials != NULL) {
 221                 calling_name = cli_credentials_get_workstation(s->conn.in.credentials);
 222         }
 223         if (calling_name == NULL) {
 224                 calling_name = "SMBCLIENT";
 225         }
 226
 227         if (target_hostname == NULL) {
 228                 target_hostname = conn->in.dest_host;
 229         }
 230
 231         if (conn->in.dest_host != NULL && is_ipaddress(conn->in.dest_host)) {
 232                 dest_address = conn->in.dest_host;
 233         }
 234
 235         subreq = smb_connect_nego_send(s,
 236                                        c->event_ctx,
 237                                        s->io.resolve_ctx,
 238                                        &conn->in.options,
 239                                        conn->in.socket_options,
 240                                        conn->in.dest_host,
 241                                        dest_address,
 242                                        conn->in.dest_ports,
 243                                        target_hostname,
 244                                        conn->in.called_name,
 245                                        calling_name);
 246         if (composite_nomem(subreq, c)) return c;
 247         tevent_req_set_callback(subreq,
 248                                 continue_smbXcli_connect,
 249                                 c);
 250
 251         return c;
 252 }
 253
 254 static void continue_smbXcli_connect(struct tevent_req *subreq)
 255 {
 256         struct composite_context *c =
 257                 tevent_req_callback_data(subreq,
 258                 struct composite_context);
 259         struct pipe_np_smb_state *s =
 260                 talloc_get_type_abort(c->private_data,
 261                 struct pipe_np_smb_state);
 262         struct smb_composite_connect *conn = &s->conn;
 263         struct composite_context *creq = NULL;
 264         enum protocol_types protocol;
 265
 266         c->status = smb_connect_nego_recv(subreq, s,
 267                                           &conn->in.existing_conn);
 268         TALLOC_FREE(subreq);
 269         if (!composite_is_ok(c)) return;
 270
 271         protocol = smbXcli_conn_protocol(conn->in.existing_conn);
 272         if (protocol >= PROTOCOL_SMB2_02) {
 273                 /*
 274                  * continue with smb2 session setup/tree connect
 275                  * on the established connection.
 276                  */
 277                 subreq = smb2_connect_send(s, c->event_ctx,
 278                                 conn->in.dest_host,
 279                                 conn->in.dest_ports,
 280                                 conn->in.service,
 281                                 s->io.resolve_ctx,
 282                                 conn->in.credentials,
 283                                 conn->in.fallback_to_anonymous,
 284                                 &conn->in.existing_conn,
 285                                 0, /* previous_session_id */
 286                                 &conn->in.options,
 287                                 conn->in.socket_options,
 288                                 conn->in.gensec_settings);
 289                 if (composite_nomem(subreq, c)) return;
 290                 tevent_req_set_callback(subreq, continue_smb2_connect, c);
 291                 return;
 292         }
 293
 294         /*
 295          * continue with smb1 session setup/tree connect
 296          * on the established connection.
 297          */
 298         creq = smb_composite_connect_send(conn, s->io.conn,
 299                                           s->io.resolve_ctx,
 300                                           c->event_ctx);
 301         if (composite_nomem(creq, c)) return;
 302
 303         composite_continue(c, creq, continue_smb_connect, c);
 304         return;
 305 }
 306
 307
 308 /*
 309   Receive result of a rpc connection to a rpc pipe on SMB
 310 */
 311 static NTSTATUS dcerpc_pipe_connect_ncacn_np_smb_recv(struct composite_context *c)
 312 {
 313         NTSTATUS status = composite_wait(c);
 314
 315         talloc_free(c);
 316         return status;
 317 }
 318
 319 /*
 320   Stage 2 of ncacn_np_smb2: Open a named pipe after successful smb2 connection
 321 */
 322 static void continue_smb2_connect(struct tevent_req *subreq)
 323 {
 324         struct composite_context *c =
 325                 tevent_req_callback_data(subreq,
 326                 struct composite_context);
 327         struct pipe_np_smb_state *s = talloc_get_type(c->private_data,
 328                                                       struct pipe_np_smb_state);
 329         struct smb2_tree *t;
 330
 331         /* receive result of smb2 connect request */
 332         c->status = smb2_connect_recv(subreq, s->io.conn, &t);
 333         TALLOC_FREE(subreq);
 334         if (!composite_is_ok(c)) return;
 335
 336         s->io.smb.conn = t->session->transport->conn;
 337         s->io.smb.session = t->session->smbXcli;
 338         s->io.smb.tcon = t->smbXcli;
 339         s->io.smb.pipe_name = dcerpc_binding_get_string_option(s->io.binding,
 340                                                                "endpoint");
 341
 342         continue_smb_open(c);
 343 }
 344
 345
 346 struct pipe_ip_tcp_state {
 347         struct dcerpc_pipe_connect io;
 348         const char *localaddr;
 349         const char *host;
 350         const char *target_hostname;
 351         uint32_t port;
 352 };
 353
 354
 355 /*
 356   Stage 2 of ncacn_ip_tcp: rpc pipe opened (or not)
 357 */
 358 static void continue_pipe_open_ncacn_ip_tcp(struct composite_context *ctx)
 359 {
 360         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 361                                                       struct composite_context);
 362         struct pipe_ip_tcp_state *s = talloc_get_type(c->private_data,
 363                                                       struct pipe_ip_tcp_state);
 364         char *localaddr = NULL;
 365         char *remoteaddr = NULL;
 366
 367         /* receive result of named pipe open request on tcp/ip */
 368         c->status = dcerpc_pipe_open_tcp_recv(ctx, s, &localaddr, &remoteaddr);
 369         if (!composite_is_ok(c)) return;
 370
 371         c->status = dcerpc_binding_set_string_option(s->io.binding,
 372                                                      "localaddress",
 373                                                      localaddr);
 374         if (!composite_is_ok(c)) return;
 375
 376         c->status = dcerpc_binding_set_string_option(s->io.binding,
 377                                                      "host",
 378                                                      remoteaddr);
 379         if (!composite_is_ok(c)) return;
 380
 381         composite_done(c);
 382 }
 383
 384
 385 /*
 386   Initiate async open of a rpc connection to a rpc pipe on TCP/IP using
 387   the binding structure to determine the endpoint and options
 388 */
 389 static struct composite_context* dcerpc_pipe_connect_ncacn_ip_tcp_send(TALLOC_CTX *mem_ctx,
 390                                                                        struct dcerpc_pipe_connect *io)
 391 {
 392         struct composite_context *c;
 393         struct pipe_ip_tcp_state *s;
 394         struct composite_context *pipe_req;
 395         const char *endpoint;
 396
 397         /* composite context allocation and setup */
 398         c = composite_create(mem_ctx, io->conn->event_ctx);
 399         if (c == NULL) return NULL;
 400
 401         s = talloc_zero(c, struct pipe_ip_tcp_state);
 402         if (composite_nomem(s, c)) return c;
 403         c->private_data = s;
 404
 405         /* store input parameters in state structure */
 406         s->io = *io;
 407         s->localaddr = dcerpc_binding_get_string_option(io->binding,
 408                                                         "localaddress");
 409         s->host = dcerpc_binding_get_string_option(io->binding, "host");
 410         s->target_hostname = dcerpc_binding_get_string_option(io->binding,
 411                                                               "target_hostname");
 412         endpoint = dcerpc_binding_get_string_option(io->binding, "endpoint");
 413         /* port number is a binding endpoint here */
 414         if (endpoint != NULL) {
 415                 s->port = atoi(endpoint);
 416         }
 417
 418         if (s->port == 0) {
 419                 composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 420                 return c;
 421         }
 422
 423         /* send pipe open request on tcp/ip */
 424         pipe_req = dcerpc_pipe_open_tcp_send(s->io.conn, s->localaddr, s->host, s->target_hostname,
 425                                              s->port, io->resolve_ctx);
 426         composite_continue(c, pipe_req, continue_pipe_open_ncacn_ip_tcp, c);
 427         return c;
 428 }
 429
 430
 431 /*
 432   Receive result of a rpc connection to a rpc pipe on TCP/IP
 433 */
 434 static NTSTATUS dcerpc_pipe_connect_ncacn_ip_tcp_recv(struct composite_context *c)
 435 {
 436         NTSTATUS status = composite_wait(c);
 437
 438         talloc_free(c);
 439         return status;
 440 }
 441
 442
 443 struct pipe_http_state {
 444         struct dcerpc_pipe_connect io;
 445         const char *localaddr;
 446         const char *target_hostname;
 447         const char *rpc_server;
 448         uint32_t rpc_server_port;
 449         char *rpc_proxy;
 450         uint32_t rpc_proxy_port;
 451         char *http_proxy;
 452         uint32_t http_proxy_port;
 453         bool use_tls;
 454         bool use_proxy;
 455         enum http_auth_method http_auth;
 456         struct loadparm_context *lp_ctx;
 457 };
 458
 459 /*
 460   Stage 2 of ncacn_http: rpc pipe opened (or not)
 461  */
 462 static void continue_pipe_open_ncacn_http(struct tevent_req *subreq)
 463 {
 464         struct composite_context *c = NULL;
 465         struct pipe_http_state *s = NULL;
 466         struct tstream_context *stream = NULL;
 467         struct tevent_queue *queue = NULL;
 468
 469         c = tevent_req_callback_data(subreq, struct composite_context);
 470         s = talloc_get_type(c->private_data, struct pipe_http_state);
 471
 472         /* receive result of RoH connect request */
 473         c->status = dcerpc_pipe_open_roh_recv(subreq, s->io.conn,
 474                                               &stream, &queue);
 475         TALLOC_FREE(subreq);
 476         if (!composite_is_ok(c)) return;
 477
 478         s->io.conn->transport.transport = NCACN_HTTP;
 479         s->io.conn->transport.stream = stream;
 480         s->io.conn->transport.write_queue = queue;
 481         s->io.conn->transport.pending_reads = 0;
 482         s->io.conn->server_name = strupper_talloc(s->io.conn,
 483                                                   s->target_hostname);
 484
 485         composite_done(c);
 486 }
 487
 488 /*
 489   Initiate async open of a rpc connection to a rpc pipe using HTTP transport,
 490   and using the binding structure to determine the endpoint and options
 491 */
 492 static struct composite_context* dcerpc_pipe_connect_ncacn_http_send(
 493                 TALLOC_CTX *mem_ctx, struct dcerpc_pipe_connect *io,
 494                 struct loadparm_context *lp_ctx)
 495 {
 496         struct composite_context *c;
 497         struct pipe_http_state *s;
 498         struct tevent_req *subreq;
 499         const char *endpoint;
 500         const char *use_proxy;
 501         char *proxy;
 502         char *port;
 503         const char *opt;
 504
 505         /* composite context allocation and setup */
 506         c = composite_create(mem_ctx, io->conn->event_ctx);
 507         if (c == NULL) return NULL;
 508
 509         s = talloc_zero(c, struct pipe_http_state);
 510         if (composite_nomem(s, c)) return c;
 511         c->private_data = s;
 512
 513         /* store input parameters in state structure */
 514         s->lp_ctx       = lp_ctx;
 515         s->io           = *io;
 516         s->localaddr    = dcerpc_binding_get_string_option(io->binding,
 517                                                         "localaddress");
 518         /* RPC server and port (the endpoint) */
 519         s->rpc_server = dcerpc_binding_get_string_option(io->binding, "host");
 520         s->target_hostname = dcerpc_binding_get_string_option(io->binding,
 521                                                               "target_hostname");
 522         endpoint = dcerpc_binding_get_string_option(io->binding, "endpoint");
 523         if (endpoint == NULL) {
 524                 composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 525                 return c;
 526         }
 527         s->rpc_server_port = atoi(endpoint);
 528         if (s->rpc_server_port == 0) {
 529                 composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 530                 return c;
 531         }
 532
 533         /* Use TLS */
 534         opt = dcerpc_binding_get_string_option(io->binding, "HttpUseTls");
 535         if (opt) {
 536                 if (strcasecmp(opt, "true") == 0) {
 537                         s->use_tls = true;
 538                 } else if (strcasecmp(opt, "false") == 0) {
 539                         s->use_tls = false;
 540                 } else {
 541                         composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 542                         return c;
 543                 }
 544         } else {
 545                 s->use_tls = true;
 546         }
 547
 548         /* RPC Proxy */
 549         proxy = port = talloc_strdup(s, dcerpc_binding_get_string_option(
 550                         io->binding, "RpcProxy"));
 551         s->rpc_proxy  = strsep(&port, ":");
 552         if (proxy && port) {
 553                 s->rpc_proxy_port = atoi(port);
 554         } else {
 555                 s->rpc_proxy_port = s->use_tls ? 443 : 80;
 556         }
 557         if (s->rpc_proxy == NULL) {
 558                 s->rpc_proxy = talloc_strdup(s, s->rpc_server);
 559                 if (composite_nomem(s->rpc_proxy, c)) return c;
 560         }
 561
 562         /* HTTP Proxy */
 563         proxy = port = talloc_strdup(s, dcerpc_binding_get_string_option(
 564                         io->binding, "HttpProxy"));
 565         s->http_proxy = strsep(&port, ":");
 566         if (proxy && port) {
 567                 s->http_proxy_port = atoi(port);
 568         } else {
 569                 s->http_proxy_port = s->use_tls ? 443 : 80;
 570         }
 571
 572         /* Use local proxy */
 573         use_proxy = dcerpc_binding_get_string_option(io->binding,
 574                                                  "HttpConnectOption");
 575         if (use_proxy && strcasecmp(use_proxy, "UseHttpProxy")) {
 576                 s->use_proxy = true;
 577         }
 578
 579         /* If use local proxy set, the http proxy should be provided */
 580         if (s->use_proxy && !s->http_proxy) {
 581                 composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 582                 return c;
 583         }
 584
 585         /* Check which HTTP authentication method to use */
 586         opt = dcerpc_binding_get_string_option(io->binding, "HttpAuthOption");
 587         if (opt) {
 588                 if (strcasecmp(opt, "basic") == 0) {
 589                         s->http_auth = HTTP_AUTH_BASIC;
 590                 } else if (strcasecmp(opt, "ntlm") == 0) {
 591                         s->http_auth = HTTP_AUTH_NTLM;
 592                 } else if (strcasecmp(opt, "negotiate") == 0) {
 593                         s->http_auth = HTTP_AUTH_NEGOTIATE;
 594                 } else {
 595                         composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 596                         return c;
 597                 }
 598         } else {
 599                 s->http_auth = HTTP_AUTH_NTLM;
 600         }
 601
 602         subreq = dcerpc_pipe_open_roh_send(s->io.conn, s->localaddr,
 603                                            s->rpc_server, s->rpc_server_port,
 604                                            s->rpc_proxy, s->rpc_proxy_port,
 605                                            s->http_proxy, s->http_proxy_port,
 606                                            s->use_tls, s->use_proxy,
 607                                            s->io.creds, io->resolve_ctx,
 608                                            s->lp_ctx, s->http_auth);
 609         if (composite_nomem(subreq, c)) return c;
 610
 611         tevent_req_set_callback(subreq, continue_pipe_open_ncacn_http, c);
 612         return c;
 613 }
 614
 615 static NTSTATUS dcerpc_pipe_connect_ncacn_http_recv(struct composite_context *c)
 616 {
 617         return composite_wait_free(c);
 618 }
 619
 620
 621 struct pipe_unix_state {
 622         struct dcerpc_pipe_connect io;
 623         const char *path;
 624 };
 625
 626
 627 /*
 628   Stage 2 of ncacn_unix: rpc pipe opened (or not)
 629 */
 630 static void continue_pipe_open_ncacn_unix_stream(struct composite_context *ctx)
 631 {
 632         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 633                                                       struct composite_context);
 634
 635         /* receive result of pipe open request on unix socket */
 636         c->status = dcerpc_pipe_open_unix_stream_recv(ctx);
 637         if (!composite_is_ok(c)) return;
 638
 639         composite_done(c);
 640 }
 641
 642
 643 /*
 644   Initiate async open of a rpc connection to a rpc pipe on unix socket using
 645   the binding structure to determine the endpoint and options
 646 */
 647 static struct composite_context* dcerpc_pipe_connect_ncacn_unix_stream_send(TALLOC_CTX *mem_ctx,
 648                                                                             struct dcerpc_pipe_connect *io)
 649 {
 650         struct composite_context *c;
 651         struct pipe_unix_state *s;
 652         struct composite_context *pipe_req;
 653
 654         /* composite context allocation and setup */
 655         c = composite_create(mem_ctx, io->conn->event_ctx);
 656         if (c == NULL) return NULL;
 657
 658         s = talloc_zero(c, struct pipe_unix_state);
 659         if (composite_nomem(s, c)) return c;
 660         c->private_data = s;
 661
 662         /* prepare pipe open parameters and store them in state structure
 663            also, verify whether biding endpoint is not null */
 664         s->io = *io;
 665
 666         s->path = dcerpc_binding_get_string_option(io->binding, "endpoint");
 667         if (s->path == NULL) {
 668                 composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 669                 return c;
 670         }
 671
 672         /* send pipe open request on unix socket */
 673         pipe_req = dcerpc_pipe_open_unix_stream_send(s->io.conn, s->path);
 674         composite_continue(c, pipe_req, continue_pipe_open_ncacn_unix_stream, c);
 675         return c;
 676 }
 677
 678
 679 /*
 680   Receive result of a rpc connection to a pipe on unix socket
 681 */
 682 static NTSTATUS dcerpc_pipe_connect_ncacn_unix_stream_recv(struct composite_context *c)
 683 {
 684         NTSTATUS status = composite_wait(c);
 685
 686         talloc_free(c);
 687         return status;
 688 }
 689
 690
 691 struct pipe_ncalrpc_state {
 692         struct dcerpc_pipe_connect io;
 693 };
 694
 695 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c);
 696
 697 /*
 698   Stage 2 of ncalrpc: rpc pipe opened (or not)
 699 */
 700 static void continue_pipe_open_ncalrpc(struct composite_context *ctx)
 701 {
 702         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 703                                                       struct composite_context);
 704
 705         /* receive result of pipe open request on ncalrpc */
 706         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 707         if (!composite_is_ok(c)) return;
 708
 709         composite_done(c);
 710 }
 711
 712
 713 /*
 714    Initiate async open of a rpc connection request on NCALRPC using
 715    the binding structure to determine the endpoint and options
 716 */
 717 static struct composite_context* dcerpc_pipe_connect_ncalrpc_send(TALLOC_CTX *mem_ctx,
 718                                                                   struct dcerpc_pipe_connect *io)
 719 {
 720         struct composite_context *c;
 721         struct pipe_ncalrpc_state *s;
 722         struct composite_context *pipe_req;
 723         const char *endpoint;
 724
 725         /* composite context allocation and setup */
 726         c = composite_create(mem_ctx, io->conn->event_ctx);
 727         if (c == NULL) return NULL;
 728
 729         s = talloc_zero(c, struct pipe_ncalrpc_state);
 730         if (composite_nomem(s, c)) return c;
 731         c->private_data = s;
 732
 733         /* store input parameters in state structure */
 734         s->io  = *io;
 735
 736         endpoint = dcerpc_binding_get_string_option(io->binding, "endpoint");
 737         if (endpoint == NULL) {
 738                 composite_error(c, NT_STATUS_INVALID_PARAMETER_MIX);
 739                 return c;
 740         }
 741
 742         /* send pipe open request */
 743         pipe_req = dcerpc_pipe_open_pipe_send(s->io.conn,
 744                                               s->io.ncalrpc.dir,
 745                                               endpoint);
 746         composite_continue(c, pipe_req, continue_pipe_open_ncalrpc, c);
 747         return c;
 748 }
 749
 750
 751 /*
 752   Receive result of a rpc connection to a rpc pipe on NCALRPC
 753 */
 754 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c)
 755 {
 756         NTSTATUS status = composite_wait(c);
 757
 758         talloc_free(c);
 759         return status;
 760 }
 761
 762
 763 struct pipe_connect_state {
 764         struct dcerpc_pipe *pipe;
 765         struct dcerpc_binding *binding;
 766         const struct ndr_interface_table *table;
 767         struct cli_credentials *credentials;
 768         struct loadparm_context *lp_ctx;
 769 };
 770
 771
 772 static void continue_map_binding(struct composite_context *ctx);
 773 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s);
 774 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx);
 775 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx);
 776 static void continue_pipe_connect_ncacn_http(struct composite_context *ctx);
 777 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx);
 778 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx);
 779 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s);
 780 static void continue_pipe_auth(struct composite_context *ctx);
 781
 782
 783 /*
 784   Stage 2 of pipe_connect_b: Receive result of endpoint mapping
 785 */
 786 static void continue_map_binding(struct composite_context *ctx)
 787 {
 788         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 789                                                       struct composite_context);
 790         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 791                                                        struct pipe_connect_state);
 792         const char *endpoint;
 793
 794         c->status = dcerpc_epm_map_binding_recv(ctx);
 795         if (!composite_is_ok(c)) return;
 796
 797         endpoint = dcerpc_binding_get_string_option(s->binding, "endpoint");
 798         DEBUG(4,("Mapped to DCERPC endpoint %s\n", endpoint));
 799
 800         continue_connect(c, s);
 801 }
 802
 803
 804 /*
 805   Stage 2 of pipe_connect_b: Continue connection after endpoint is known
 806 */
 807 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s)
 808 {
 809         struct dcerpc_pipe_connect pc;
 810
 811         /* potential exits to another stage by sending an async request */
 812         struct composite_context *ncacn_np_smb_req;
 813         struct composite_context *ncacn_ip_tcp_req;
 814         struct composite_context *ncacn_http_req;
 815         struct composite_context *ncacn_unix_req;
 816         struct composite_context *ncalrpc_req;
 817         enum dcerpc_transport_t transport;
 818
 819         /* dcerpc pipe connect input parameters */
 820         ZERO_STRUCT(pc);
 821         pc.conn         = s->pipe->conn;
 822         pc.binding      = s->binding;
 823         pc.interface    = s->table;
 824         pc.creds        = s->credentials;
 825         pc.resolve_ctx  = lpcfg_resolve_context(s->lp_ctx);
 826
 827         transport = dcerpc_binding_get_transport(s->binding);
 828
 829         /* connect dcerpc pipe depending on required transport */
 830         switch (transport) {
 831         case NCACN_NP:
 832                 /*
 833                  * SMB1/2/3...
 834                  */
 835                 ncacn_np_smb_req = dcerpc_pipe_connect_ncacn_np_smb_send(c, &pc, s->lp_ctx);
 836                 composite_continue(c, ncacn_np_smb_req, continue_pipe_connect_ncacn_np_smb, c);
 837                 return;
 838
 839         case NCACN_IP_TCP:
 840                 ncacn_ip_tcp_req = dcerpc_pipe_connect_ncacn_ip_tcp_send(c, &pc);
 841                 composite_continue(c, ncacn_ip_tcp_req, continue_pipe_connect_ncacn_ip_tcp, c);
 842                 return;
 843
 844         case NCACN_HTTP:
 845                 ncacn_http_req = dcerpc_pipe_connect_ncacn_http_send(c, &pc, s->lp_ctx);
 846                 composite_continue(c, ncacn_http_req, continue_pipe_connect_ncacn_http, c);
 847                 return;
 848
 849         case NCACN_UNIX_STREAM:
 850                 ncacn_unix_req = dcerpc_pipe_connect_ncacn_unix_stream_send(c, &pc);
 851                 composite_continue(c, ncacn_unix_req, continue_pipe_connect_ncacn_unix, c);
 852                 return;
 853
 854         case NCALRPC:
 855                 pc.ncalrpc.dir = lpcfg_ncalrpc_dir(s->lp_ctx);
 856                 c->status = dcerpc_binding_set_string_option(s->binding, "ncalrpc_dir",
 857                                                              pc.ncalrpc.dir);
 858                 if (!composite_is_ok(c)) return;
 859                 ncalrpc_req = dcerpc_pipe_connect_ncalrpc_send(c, &pc);
 860                 composite_continue(c, ncalrpc_req, continue_pipe_connect_ncalrpc, c);
 861                 return;
 862
 863         default:
 864                 /* looks like a transport we don't support now */
 865                 composite_error(c, NT_STATUS_NOT_SUPPORTED);
 866         }
 867 }
 868
 869
 870 /*
 871   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 872   named pipe on smb
 873 */
 874 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx)
 875 {
 876         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 877                                                       struct composite_context);
 878         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 879                                                        struct pipe_connect_state);
 880
 881         c->status = dcerpc_pipe_connect_ncacn_np_smb_recv(ctx);
 882         if (!composite_is_ok(c)) return;
 883
 884         continue_pipe_connect(c, s);
 885 }
 886
 887
 888 /*
 889   Stage 3 of pipe_connect_b: Receive result of pipe connect request on tcp/ip
 890 */
 891 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx)
 892 {
 893         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 894                                                       struct composite_context);
 895         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 896                                                        struct pipe_connect_state);
 897
 898         c->status = dcerpc_pipe_connect_ncacn_ip_tcp_recv(ctx);
 899         if (!composite_is_ok(c)) return;
 900
 901         continue_pipe_connect(c, s);
 902 }
 903
 904
 905 /*
 906   Stage 3 of pipe_connect_b: Receive result of pipe connect request on http
 907 */
 908 static void continue_pipe_connect_ncacn_http(struct composite_context *ctx)
 909 {
 910         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 911                                                       struct composite_context);
 912         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 913                                                        struct pipe_connect_state);
 914
 915         c->status = dcerpc_pipe_connect_ncacn_http_recv(ctx);
 916         if (!composite_is_ok(c)) return;
 917
 918         continue_pipe_connect(c, s);
 919 }
 920
 921
 922 /*
 923   Stage 3 of pipe_connect_b: Receive result of pipe connect request on unix socket
 924 */
 925 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx)
 926 {
 927         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 928                                                       struct composite_context);
 929         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 930                                                        struct pipe_connect_state);
 931
 932         c->status = dcerpc_pipe_connect_ncacn_unix_stream_recv(ctx);
 933         if (!composite_is_ok(c)) return;
 934
 935         continue_pipe_connect(c, s);
 936 }
 937
 938
 939 /*
 940   Stage 3 of pipe_connect_b: Receive result of pipe connect request on local rpc
 941 */
 942 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx)
 943 {
 944         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 945                                                       struct composite_context);
 946         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 947                                                        struct pipe_connect_state);
 948
 949         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 950         if (!composite_is_ok(c)) return;
 951
 952         continue_pipe_connect(c, s);
 953 }
 954
 955
 956 /*
 957   Stage 4 of pipe_connect_b: Start an authentication on connected dcerpc pipe
 958   depending on credentials and binding flags passed.
 959 */
 960 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s)
 961 {
 962         struct composite_context *auth_bind_req;
 963
 964         s->pipe->binding = dcerpc_binding_dup(s->pipe, s->binding);
 965         if (composite_nomem(s->pipe->binding, c)) {
 966                 return;
 967         }
 968
 969         auth_bind_req = dcerpc_pipe_auth_send(s->pipe, s->binding, s->table,
 970                                               s->credentials, s->lp_ctx);
 971         composite_continue(c, auth_bind_req, continue_pipe_auth, c);
 972 }
 973
 974
 975 /*
 976   Stage 5 of pipe_connect_b: Receive result of pipe authentication request
 977   and say if all went ok
 978 */
 979 static void continue_pipe_auth(struct composite_context *ctx)
 980 {
 981         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 982                                                       struct composite_context);
 983         struct pipe_connect_state *s = talloc_get_type(c->private_data, struct pipe_connect_state);
 984
 985         c->status = dcerpc_pipe_auth_recv(ctx, s, &s->pipe);
 986         if (!composite_is_ok(c)) return;
 987
 988         composite_done(c);
 989 }
 990
 991
 992 /*
 993   handle timeouts of a dcerpc connect
 994 */
 995 static void dcerpc_connect_timeout_handler(struct tevent_context *ev, struct tevent_timer *te,
 996                                            struct timeval t, void *private_data)
 997 {
 998         struct composite_context *c = talloc_get_type_abort(private_data,
 999                                                       struct composite_context);
1000         struct pipe_connect_state *s = talloc_get_type_abort(c->private_data, struct pipe_connect_state);
1001         if (!s->pipe->inhibit_timeout_processing) {
1002                 composite_error(c, NT_STATUS_IO_TIMEOUT);
1003         } else {
1004                 s->pipe->timed_out = true;
1005         }
1006 }
1007
1008 /*
1009   start a request to open a rpc connection to a rpc pipe, using
1010   specified binding structure to determine the endpoint and options
1011 */
1012 _PUBLIC_ struct composite_context* dcerpc_pipe_connect_b_send(TALLOC_CTX *parent_ctx,
1013                                                      const struct dcerpc_binding *binding,
1014                                                      const struct ndr_interface_table *table,
1015                                                      struct cli_credentials *credentials,
1016                                                      struct tevent_context *ev,
1017                                                      struct loadparm_context *lp_ctx)
1018 {
1019         struct composite_context *c;
1020         struct pipe_connect_state *s;
1021         enum dcerpc_transport_t transport;
1022         const char *endpoint = NULL;
1023         struct cli_credentials *epm_creds = NULL;
1024
1025         /* composite context allocation and setup */
1026         c = composite_create(parent_ctx, ev);
1027         if (c == NULL) {
1028                 return NULL;
1029         }
1030
1031         s = talloc_zero(c, struct pipe_connect_state);
1032         if (composite_nomem(s, c)) return c;
1033         c->private_data = s;
1034
1035         /* initialise dcerpc pipe structure */
1036         s->pipe = dcerpc_pipe_init(c, ev);
1037         if (composite_nomem(s->pipe, c)) return c;
1038
1039         if (DEBUGLEVEL >= 10)
1040                 s->pipe->conn->packet_log_dir = lpcfg_lock_directory(lp_ctx);
1041
1042         /* store parameters in state structure */
1043         s->binding      = dcerpc_binding_dup(s, binding);
1044         if (composite_nomem(s->binding, c)) return c;
1045         s->table        = table;
1046         s->credentials  = credentials;
1047         s->lp_ctx       = lp_ctx;
1048
1049         s->pipe->timed_out = false;
1050         s->pipe->inhibit_timeout_processing = false;
1051
1052         tevent_add_timer(c->event_ctx, c,
1053                          timeval_current_ofs(DCERPC_REQUEST_TIMEOUT, 0),
1054                          dcerpc_connect_timeout_handler, c);
1055
1056         transport = dcerpc_binding_get_transport(s->binding);
1057
1058         switch (transport) {
1059         case NCACN_NP:
1060         case NCACN_IP_TCP:
1061         case NCALRPC:
1062                 endpoint = dcerpc_binding_get_string_option(s->binding, "endpoint");
1063
1064                 /* anonymous credentials for rpc connection used to get endpoint mapping */
1065                 epm_creds = cli_credentials_init_anon(s);
1066                 if (composite_nomem(epm_creds, c)) return c;
1067
1068                 break;
1069         case NCACN_HTTP:
1070                 endpoint = dcerpc_binding_get_string_option(s->binding, "endpoint");
1071                 epm_creds = credentials;
1072                 break;
1073         default:
1074                 DBG_INFO("Unknown transport; continuing with anon, no endpoint.\n");
1075                 epm_creds = cli_credentials_init_anon(s);
1076                 if (composite_nomem(epm_creds, c)){
1077                         return c;
1078                 }
1079                 break;
1080         }
1081
1082         if (endpoint == NULL) {
1083                 struct composite_context *binding_req;
1084
1085                 binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
1086                                                           epm_creds,
1087                                                           s->pipe->conn->event_ctx,
1088                                                           s->lp_ctx);
1089                 composite_continue(c, binding_req, continue_map_binding, c);
1090                 return c;
1091         }
1092
1093         continue_connect(c, s);
1094         return c;
1095 }
1096
1097
1098 /*
1099   receive result of a request to open a rpc connection to a rpc pipe
1100 */
1101 _PUBLIC_ NTSTATUS dcerpc_pipe_connect_b_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
1102                                     struct dcerpc_pipe **p)
1103 {
1104         NTSTATUS status;
1105         struct pipe_connect_state *s;
1106
1107         status = composite_wait(c);
1108
1109         if (NT_STATUS_IS_OK(status)) {
1110                 s = talloc_get_type(c->private_data, struct pipe_connect_state);
1111                 talloc_steal(mem_ctx, s->pipe);
1112                 *p = s->pipe;
1113         }
1114         talloc_free(c);
1115         return status;
1116 }
1117
1118
1119 /*
1120   open a rpc connection to a rpc pipe, using the specified
1121   binding structure to determine the endpoint and options - sync version
1122 */
1123 _PUBLIC_ NTSTATUS dcerpc_pipe_connect_b(TALLOC_CTX *parent_ctx,
1124                                struct dcerpc_pipe **pp,
1125                                const struct dcerpc_binding *binding,
1126                                const struct ndr_interface_table *table,
1127                                struct cli_credentials *credentials,
1128                                struct tevent_context *ev,
1129                                struct loadparm_context *lp_ctx)
1130 {
1131         struct composite_context *c;
1132
1133         c = dcerpc_pipe_connect_b_send(parent_ctx, binding, table,
1134                                        credentials, ev, lp_ctx);
1135         return dcerpc_pipe_connect_b_recv(c, parent_ctx, pp);
1136 }
1137
1138
1139 struct pipe_conn_state {
1140         struct dcerpc_pipe *pipe;
1141 };
1142
1143
1144 static void continue_pipe_connect_b(struct composite_context *ctx);
1145
1146
1147 /*
1148   Initiate rpc connection to a rpc pipe, using the specified string
1149   binding to determine the endpoint and options.
1150   The string is to be parsed to a binding structure first.
1151 */
1152 _PUBLIC_ struct composite_context* dcerpc_pipe_connect_send(TALLOC_CTX *parent_ctx,
1153                                                    const char *binding,
1154                                                    const struct ndr_interface_table *table,
1155                                                    struct cli_credentials *credentials,
1156                                                    struct tevent_context *ev, struct loadparm_context *lp_ctx)
1157 {
1158         struct composite_context *c;
1159         struct pipe_conn_state *s;
1160         struct dcerpc_binding *b;
1161         struct composite_context *pipe_conn_req;
1162
1163         /* composite context allocation and setup */
1164         c = composite_create(parent_ctx, ev);
1165         if (c == NULL) {
1166                 return NULL;
1167         }
1168
1169         s = talloc_zero(c, struct pipe_conn_state);
1170         if (composite_nomem(s, c)) return c;
1171         c->private_data = s;
1172
1173         /* parse binding string to the structure */
1174         c->status = dcerpc_parse_binding(c, binding, &b);
1175         if (!NT_STATUS_IS_OK(c->status)) {
1176                 DEBUG(0, ("Failed to parse dcerpc binding '%s'\n", binding));
1177                 composite_error(c, c->status);
1178                 return c;
1179         }
1180
1181         DEBUG(3, ("Using binding %s\n", dcerpc_binding_string(c, b)));
1182
1183         /*
1184            start connecting to a rpc pipe after binding structure
1185            is established
1186          */
1187         pipe_conn_req = dcerpc_pipe_connect_b_send(c, b, table,
1188                                                    credentials, ev, lp_ctx);
1189         composite_continue(c, pipe_conn_req, continue_pipe_connect_b, c);
1190         return c;
1191 }
1192
1193
1194 /*
1195   Stage 2 of pipe_connect: Receive result of actual pipe connect request
1196   and say if we're done ok
1197 */
1198 static void continue_pipe_connect_b(struct composite_context *ctx)
1199 {
1200         struct composite_context *c = talloc_get_type(ctx->async.private_data,
1201                                                       struct composite_context);
1202         struct pipe_conn_state *s = talloc_get_type(c->private_data,
1203                                                     struct pipe_conn_state);
1204
1205         c->status = dcerpc_pipe_connect_b_recv(ctx, c, &s->pipe);
1206         talloc_steal(s, s->pipe);
1207         if (!composite_is_ok(c)) return;
1208
1209         composite_done(c);
1210 }
1211
1212
1213 /*
1214   Receive result of pipe connect (using binding string) request
1215   and return connected pipe structure.
1216 */
1217 NTSTATUS dcerpc_pipe_connect_recv(struct composite_context *c,
1218                                   TALLOC_CTX *mem_ctx,
1219                                   struct dcerpc_pipe **pp)
1220 {
1221         NTSTATUS status;
1222         struct pipe_conn_state *s;
1223
1224         status = composite_wait(c);
1225         if (NT_STATUS_IS_OK(status)) {
1226                 s = talloc_get_type(c->private_data, struct pipe_conn_state);
1227                 *pp = talloc_steal(mem_ctx, s->pipe);
1228         }
1229         talloc_free(c);
1230         return status;
1231 }
1232
1233
1234 /*
1235   Open a rpc connection to a rpc pipe, using the specified string
1236   binding to determine the endpoint and options - sync version
1237 */
1238 _PUBLIC_ NTSTATUS dcerpc_pipe_connect(TALLOC_CTX *parent_ctx,
1239                              struct dcerpc_pipe **pp,
1240                              const char *binding,
1241                              const struct ndr_interface_table *table,
1242                              struct cli_credentials *credentials,
1243                              struct tevent_context *ev,
1244                              struct loadparm_context *lp_ctx)
1245 {
1246         struct composite_context *c;
1247         c = dcerpc_pipe_connect_send(parent_ctx, binding,
1248                                      table, credentials, ev, lp_ctx);
1249         return dcerpc_pipe_connect_recv(c, parent_ctx, pp);
1250 }
1251