source/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 "librpc/rpc/dcerpc.h"
  33 #include "auth/credentials/credentials.h"
  34 #include "param/param.h"
  35
  36
  37 struct pipe_np_smb_state {
  38         struct smb_composite_connect conn;
  39         struct smbcli_tree *tree;
  40         struct dcerpc_pipe_connect io;
  41 };
  42
  43
  44 /*
  45   Stage 3 of ncacn_np_smb: Named pipe opened (or not)
  46 */
  47 static void continue_pipe_open_smb(struct composite_context *ctx)
  48 {
  49         struct composite_context *c = talloc_get_type(ctx->async.private_data,
  50                                                       struct composite_context);
  51
  52         /* receive result of named pipe open request on smb */
  53         c->status = dcerpc_pipe_open_smb_recv(ctx);
  54         if (!composite_is_ok(c)) return;
  55
  56         composite_done(c);
  57 }
  58
  59
  60 /*
  61   Stage 2 of ncacn_np_smb: Open a named pipe after successful smb connection
  62 */
  63 static void continue_smb_connect(struct composite_context *ctx)
  64 {
  65         struct composite_context *open_ctx;
  66         struct composite_context *c = talloc_get_type(ctx->async.private_data,
  67                                                       struct composite_context);
  68         struct pipe_np_smb_state *s = talloc_get_type(c->private_data,
  69                                                       struct pipe_np_smb_state);
  70
  71         /* receive result of smb connect request */
  72         c->status = smb_composite_connect_recv(ctx, c);
  73         if (!composite_is_ok(c)) return;
  74
  75         /* prepare named pipe open parameters */
  76         s->tree         = s->conn.out.tree;
  77         s->io.pipe_name = s->io.binding->endpoint;
  78
  79         /* send named pipe open request */
  80         open_ctx = dcerpc_pipe_open_smb_send(s->io.pipe, s->tree, s->io.pipe_name);
  81         if (composite_nomem(open_ctx, c)) return;
  82
  83         composite_continue(c, open_ctx, continue_pipe_open_smb, c);
  84 }
  85
  86
  87 /*
  88   Initiate async open of a rpc connection to a rpc pipe on SMB using
  89   the binding structure to determine the endpoint and options
  90 */
  91 static struct composite_context *dcerpc_pipe_connect_ncacn_np_smb_send(TALLOC_CTX *mem_ctx,
  92                                                                 struct dcerpc_pipe_connect *io)
  93 {
  94         struct composite_context *c;
  95         struct pipe_np_smb_state *s;
  96         struct composite_context *conn_req;
  97         struct smb_composite_connect *conn;
  98
  99         /* composite context allocation and setup */
 100         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 101         if (c == NULL) return NULL;
 102
 103         s = talloc_zero(c, struct pipe_np_smb_state);
 104         if (composite_nomem(s, c)) return c;
 105         c->private_data = s;
 106
 107         s->io  = *io;
 108         conn   = &s->conn;
 109
 110         /* prepare smb connection parameters: we're connecting to IPC$ share on
 111            remote rpc server */
 112         conn->in.dest_host              = s->io.binding->host;
 113         conn->in.port                   = 0;
 114         if (s->io.binding->target_hostname == NULL)
 115                 conn->in.called_name = "*SMBSERVER"; /* FIXME: This is invalid */
 116         else
 117                 conn->in.called_name            = s->io.binding->target_hostname;
 118         conn->in.service                = "IPC$";
 119         conn->in.service_type           = NULL;
 120         conn->in.workgroup              = lp_workgroup(global_loadparm);
 121
 122         /*
 123          * provide proper credentials - user supplied, but allow a
 124          * fallback to anonymous if this is an schannel connection
 125          * (might be NT4 not allowing machine logins at session
 126          * setup).
 127          */
 128         s->conn.in.credentials = s->io.creds;
 129         if (s->io.binding->flags & DCERPC_SCHANNEL) {
 130                 conn->in.fallback_to_anonymous  = true;
 131         } else {
 132                 conn->in.fallback_to_anonymous  = false;
 133         }
 134
 135         /* send smb connect request */
 136         conn_req = smb_composite_connect_send(conn, s->io.pipe->conn, s->io.pipe->conn->event_ctx);
 137         if (composite_nomem(conn_req, c)) return c;
 138
 139         composite_continue(c, conn_req, continue_smb_connect, c);
 140         return c;
 141 }
 142
 143
 144 /*
 145   Receive result of a rpc connection to a rpc pipe on SMB
 146 */
 147 static NTSTATUS dcerpc_pipe_connect_ncacn_np_smb_recv(struct composite_context *c)
 148 {
 149         NTSTATUS status = composite_wait(c);
 150
 151         talloc_free(c);
 152         return status;
 153 }
 154
 155
 156 struct pipe_np_smb2_state {
 157         struct smb2_tree *tree;
 158         struct dcerpc_pipe_connect io;
 159 };
 160
 161
 162 /*
 163   Stage 3 of ncacn_np_smb: Named pipe opened (or not)
 164 */
 165 static void continue_pipe_open_smb2(struct composite_context *ctx)
 166 {
 167         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 168                                                       struct composite_context);
 169
 170         /* receive result of named pipe open request on smb2 */
 171         c->status = dcerpc_pipe_open_smb2_recv(ctx);
 172         if (!composite_is_ok(c)) return;
 173
 174         composite_done(c);
 175 }
 176
 177
 178 /*
 179   Stage 2 of ncacn_np_smb2: Open a named pipe after successful smb2 connection
 180 */
 181 static void continue_smb2_connect(struct composite_context *ctx)
 182 {
 183         struct composite_context *open_req;
 184         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 185                                                       struct composite_context);
 186         struct pipe_np_smb2_state *s = talloc_get_type(c->private_data,
 187                                                        struct pipe_np_smb2_state);
 188
 189         /* receive result of smb2 connect request */
 190         c->status = smb2_connect_recv(ctx, c, &s->tree);
 191         if (!composite_is_ok(c)) return;
 192
 193         /* prepare named pipe open parameters */
 194         s->io.pipe_name = s->io.binding->endpoint;
 195
 196         /* send named pipe open request */
 197         open_req = dcerpc_pipe_open_smb2_send(s->io.pipe, s->tree, s->io.pipe_name);
 198         if (composite_nomem(open_req, c)) return;
 199
 200         composite_continue(c, open_req, continue_pipe_open_smb2, c);
 201 }
 202
 203
 204 /*
 205    Initiate async open of a rpc connection request on SMB2 using
 206    the binding structure to determine the endpoint and options
 207 */
 208 static struct composite_context *dcerpc_pipe_connect_ncacn_np_smb2_send(
 209                                         TALLOC_CTX *mem_ctx,
 210                                         struct dcerpc_pipe_connect *io)
 211 {
 212         struct composite_context *c;
 213         struct pipe_np_smb2_state *s;
 214         struct composite_context *conn_req;
 215
 216         /* composite context allocation and setup */
 217         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 218         if (c == NULL) return NULL;
 219
 220         s = talloc_zero(c, struct pipe_np_smb2_state);
 221         if (composite_nomem(s, c)) return c;
 222         c->private_data = s;
 223
 224         s->io = *io;
 225
 226         /*
 227          * provide proper credentials - user supplied or anonymous in case this is
 228          * schannel connection
 229          */
 230         if (s->io.binding->flags & DCERPC_SCHANNEL) {
 231                 s->io.creds = cli_credentials_init(mem_ctx);
 232                 if (composite_nomem(s->io.creds, c)) return c;
 233
 234                 cli_credentials_guess(s->io.creds, global_loadparm);
 235         }
 236
 237         /* send smb2 connect request */
 238         conn_req = smb2_connect_send(mem_ctx, s->io.binding->host, "IPC$",
 239                                      s->io.name_resolve_order,
 240                                      s->io.creds,
 241                                      c->event_ctx);
 242         composite_continue(c, conn_req, continue_smb2_connect, c);
 243         return c;
 244 }
 245
 246
 247 /*
 248   Receive result of a rpc connection to a rpc pipe on SMB2
 249 */
 250 static NTSTATUS dcerpc_pipe_connect_ncacn_np_smb2_recv(struct composite_context *c)
 251 {
 252         NTSTATUS status = composite_wait(c);
 253
 254         talloc_free(c);
 255         return status;
 256 }
 257
 258
 259 struct pipe_ip_tcp_state {
 260         struct dcerpc_pipe_connect io;
 261         const char *host;
 262         const char *target_hostname;
 263         uint32_t port;
 264 };
 265
 266
 267 /*
 268   Stage 2 of ncacn_ip_tcp: rpc pipe opened (or not)
 269 */
 270 static void continue_pipe_open_ncacn_ip_tcp(struct composite_context *ctx)
 271 {
 272         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 273                                                       struct composite_context);
 274
 275         /* receive result of named pipe open request on tcp/ip */
 276         c->status = dcerpc_pipe_open_tcp_recv(ctx);
 277         if (!composite_is_ok(c)) return;
 278
 279         composite_done(c);
 280 }
 281
 282
 283 /*
 284   Initiate async open of a rpc connection to a rpc pipe on TCP/IP using
 285   the binding structure to determine the endpoint and options
 286 */
 287 static struct composite_context* dcerpc_pipe_connect_ncacn_ip_tcp_send(TALLOC_CTX *mem_ctx,
 288                                                                        struct dcerpc_pipe_connect *io)
 289 {
 290         struct composite_context *c;
 291         struct pipe_ip_tcp_state *s;
 292         struct composite_context *pipe_req;
 293
 294         /* composite context allocation and setup */
 295         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 296         if (c == NULL) return NULL;
 297
 298         s = talloc_zero(c, struct pipe_ip_tcp_state);
 299         if (composite_nomem(s, c)) return c;
 300         c->private_data = s;
 301
 302         /* store input parameters in state structure */
 303         s->io               = *io;
 304         s->host             = talloc_reference(c, io->binding->host);
 305         s->target_hostname  = talloc_reference(c, io->binding->target_hostname);
 306                              /* port number is a binding endpoint here */
 307         s->port             = atoi(io->binding->endpoint);
 308
 309         /* send pipe open request on tcp/ip */
 310         pipe_req = dcerpc_pipe_open_tcp_send(s->io.pipe->conn, s->host, s->target_hostname,
 311                                              s->port);
 312         composite_continue(c, pipe_req, continue_pipe_open_ncacn_ip_tcp, c);
 313         return c;
 314 }
 315
 316
 317 /*
 318   Receive result of a rpc connection to a rpc pipe on TCP/IP
 319 */
 320 static NTSTATUS dcerpc_pipe_connect_ncacn_ip_tcp_recv(struct composite_context *c)
 321 {
 322         NTSTATUS status = composite_wait(c);
 323
 324         talloc_free(c);
 325         return status;
 326 }
 327
 328
 329 struct pipe_unix_state {
 330         struct dcerpc_pipe_connect io;
 331         const char *path;
 332 };
 333
 334
 335 /*
 336   Stage 2 of ncacn_unix: rpc pipe opened (or not)
 337 */
 338 static void continue_pipe_open_ncacn_unix_stream(struct composite_context *ctx)
 339 {
 340         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 341                                                       struct composite_context);
 342
 343         /* receive result of pipe open request on unix socket */
 344         c->status = dcerpc_pipe_open_unix_stream_recv(ctx);
 345         if (!composite_is_ok(c)) return;
 346
 347         composite_done(c);
 348 }
 349
 350
 351 /*
 352   Initiate async open of a rpc connection to a rpc pipe on unix socket using
 353   the binding structure to determine the endpoint and options
 354 */
 355 static struct composite_context* dcerpc_pipe_connect_ncacn_unix_stream_send(TALLOC_CTX *mem_ctx,
 356                                                                             struct dcerpc_pipe_connect *io)
 357 {
 358         struct composite_context *c;
 359         struct pipe_unix_state *s;
 360         struct composite_context *pipe_req;
 361
 362         /* composite context allocation and setup */
 363         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 364         if (c == NULL) return NULL;
 365
 366         s = talloc_zero(c, struct pipe_unix_state);
 367         if (composite_nomem(s, c)) return c;
 368         c->private_data = s;
 369
 370         /* prepare pipe open parameters and store them in state structure
 371            also, verify whether biding endpoint is not null */
 372         s->io = *io;
 373
 374         if (!io->binding->endpoint) {
 375                 DEBUG(0, ("Path to unix socket not specified\n"));
 376                 composite_error(c, NT_STATUS_INVALID_PARAMETER);
 377                 return c;
 378         }
 379
 380         s->path  = talloc_strdup(c, io->binding->endpoint);  /* path is a binding endpoint here */
 381         if (composite_nomem(s->path, c)) return c;
 382
 383         /* send pipe open request on unix socket */
 384         pipe_req = dcerpc_pipe_open_unix_stream_send(s->io.pipe->conn, s->path);
 385         composite_continue(c, pipe_req, continue_pipe_open_ncacn_unix_stream, c);
 386         return c;
 387 }
 388
 389
 390 /*
 391   Receive result of a rpc connection to a pipe on unix socket
 392 */
 393 static NTSTATUS dcerpc_pipe_connect_ncacn_unix_stream_recv(struct composite_context *c)
 394 {
 395         NTSTATUS status = composite_wait(c);
 396
 397         talloc_free(c);
 398         return status;
 399 }
 400
 401
 402 struct pipe_ncalrpc_state {
 403         struct dcerpc_pipe_connect io;
 404 };
 405
 406 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c);
 407
 408 /*
 409   Stage 2 of ncalrpc: rpc pipe opened (or not)
 410 */
 411 static void continue_pipe_open_ncalrpc(struct composite_context *ctx)
 412 {
 413         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 414                                                       struct composite_context);
 415
 416         /* receive result of pipe open request on ncalrpc */
 417         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 418         if (!composite_is_ok(c)) return;
 419
 420         composite_done(c);
 421 }
 422
 423
 424 /*
 425    Initiate async open of a rpc connection request on NCALRPC using
 426    the binding structure to determine the endpoint and options
 427 */
 428 static struct composite_context* dcerpc_pipe_connect_ncalrpc_send(TALLOC_CTX *mem_ctx,
 429                                                                   struct dcerpc_pipe_connect *io)
 430 {
 431         struct composite_context *c;
 432         struct pipe_ncalrpc_state *s;
 433         struct composite_context *pipe_req;
 434
 435         /* composite context allocation and setup */
 436         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 437         if (c == NULL) return NULL;
 438
 439         s = talloc_zero(c, struct pipe_ncalrpc_state);
 440         if (composite_nomem(s, c)) return c;
 441         c->private_data = s;
 442
 443         /* store input parameters in state structure */
 444         s->io  = *io;
 445
 446         /* send pipe open request */
 447         pipe_req = dcerpc_pipe_open_pipe_send(s->io.pipe->conn, s->io.binding->endpoint);
 448         composite_continue(c, pipe_req, continue_pipe_open_ncalrpc, c);
 449         return c;
 450 }
 451
 452
 453 /*
 454   Receive result of a rpc connection to a rpc pipe on NCALRPC
 455 */
 456 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c)
 457 {
 458         NTSTATUS status = composite_wait(c);
 459
 460         talloc_free(c);
 461         return status;
 462 }
 463
 464
 465 struct pipe_connect_state {
 466         struct dcerpc_pipe *pipe;
 467         struct dcerpc_binding *binding;
 468         const struct ndr_interface_table *table;
 469         struct cli_credentials *credentials;
 470 };
 471
 472
 473 static void continue_map_binding(struct composite_context *ctx);
 474 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s);
 475 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx);
 476 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx);
 477 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx);
 478 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx);
 479 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx);
 480 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s);
 481 static void continue_pipe_auth(struct composite_context *ctx);
 482
 483
 484 /*
 485   Stage 2 of pipe_connect_b: Receive result of endpoint mapping
 486 */
 487 static void continue_map_binding(struct composite_context *ctx)
 488 {
 489         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 490                                                       struct composite_context);
 491         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 492                                                        struct pipe_connect_state);
 493
 494         c->status = dcerpc_epm_map_binding_recv(ctx);
 495         if (!composite_is_ok(c)) return;
 496
 497         DEBUG(2,("Mapped to DCERPC endpoint %s\n", s->binding->endpoint));
 498
 499         continue_connect(c, s);
 500 }
 501
 502
 503 /*
 504   Stage 2 of pipe_connect_b: Continue connection after endpoint is known
 505 */
 506 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s)
 507 {
 508         struct dcerpc_pipe_connect pc;
 509
 510         /* potential exits to another stage by sending an async request */
 511         struct composite_context *ncacn_np_smb2_req;
 512         struct composite_context *ncacn_np_smb_req;
 513         struct composite_context *ncacn_ip_tcp_req;
 514         struct composite_context *ncacn_unix_req;
 515         struct composite_context *ncalrpc_req;
 516
 517         /* dcerpc pipe connect input parameters */
 518         pc.pipe         = s->pipe;
 519         pc.binding      = s->binding;
 520         pc.interface    = s->table;
 521         pc.creds        = s->credentials;
 522         pc.name_resolve_order = lp_name_resolve_order(global_loadparm);
 523
 524         /* connect dcerpc pipe depending on required transport */
 525         switch (s->binding->transport) {
 526         case NCACN_NP:
 527                 if (pc.binding->flags & DCERPC_SMB2) {
 528                         /* new varient of SMB a.k.a. SMB2 */
 529                         ncacn_np_smb2_req = dcerpc_pipe_connect_ncacn_np_smb2_send(c, &pc);
 530                         composite_continue(c, ncacn_np_smb2_req, continue_pipe_connect_ncacn_np_smb2, c);
 531                         return;
 532
 533                 } else {
 534                         /* good old ordinary SMB */
 535                         ncacn_np_smb_req = dcerpc_pipe_connect_ncacn_np_smb_send(c, &pc);
 536                         composite_continue(c, ncacn_np_smb_req, continue_pipe_connect_ncacn_np_smb, c);
 537                         return;
 538                 }
 539                 break;
 540
 541         case NCACN_IP_TCP:
 542                 ncacn_ip_tcp_req = dcerpc_pipe_connect_ncacn_ip_tcp_send(c, &pc);
 543                 composite_continue(c, ncacn_ip_tcp_req, continue_pipe_connect_ncacn_ip_tcp, c);
 544                 return;
 545
 546         case NCACN_UNIX_STREAM:
 547                 ncacn_unix_req = dcerpc_pipe_connect_ncacn_unix_stream_send(c, &pc);
 548                 composite_continue(c, ncacn_unix_req, continue_pipe_connect_ncacn_unix, c);
 549                 return;
 550
 551         case NCALRPC:
 552                 ncalrpc_req = dcerpc_pipe_connect_ncalrpc_send(c, &pc);
 553                 composite_continue(c, ncalrpc_req, continue_pipe_connect_ncalrpc, c);
 554                 return;
 555
 556         default:
 557                 /* looks like a transport we don't support now */
 558                 composite_error(c, NT_STATUS_NOT_SUPPORTED);
 559         }
 560 }
 561
 562
 563 /*
 564   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 565   named pipe on smb2
 566 */
 567 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx)
 568 {
 569         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 570                                                       struct composite_context);
 571         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 572                                                        struct pipe_connect_state);
 573
 574         c->status = dcerpc_pipe_connect_ncacn_np_smb2_recv(ctx);
 575         if (!composite_is_ok(c)) return;
 576
 577         continue_pipe_connect(c, s);
 578 }
 579
 580
 581 /*
 582   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 583   named pipe on smb
 584 */
 585 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx)
 586 {
 587         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 588                                                       struct composite_context);
 589         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 590                                                        struct pipe_connect_state);
 591
 592         c->status = dcerpc_pipe_connect_ncacn_np_smb_recv(ctx);
 593         if (!composite_is_ok(c)) return;
 594
 595         continue_pipe_connect(c, s);
 596 }
 597
 598
 599 /*
 600   Stage 3 of pipe_connect_b: Receive result of pipe connect request on tcp/ip
 601 */
 602 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx)
 603 {
 604         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 605                                                       struct composite_context);
 606         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 607                                                        struct pipe_connect_state);
 608
 609         c->status = dcerpc_pipe_connect_ncacn_ip_tcp_recv(ctx);
 610         if (!composite_is_ok(c)) return;
 611
 612         continue_pipe_connect(c, s);
 613 }
 614
 615
 616 /*
 617   Stage 3 of pipe_connect_b: Receive result of pipe connect request on unix socket
 618 */
 619 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx)
 620 {
 621         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 622                                                       struct composite_context);
 623         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 624                                                        struct pipe_connect_state);
 625
 626         c->status = dcerpc_pipe_connect_ncacn_unix_stream_recv(ctx);
 627         if (!composite_is_ok(c)) return;
 628
 629         continue_pipe_connect(c, s);
 630 }
 631
 632
 633 /*
 634   Stage 3 of pipe_connect_b: Receive result of pipe connect request on local rpc
 635 */
 636 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx)
 637 {
 638         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 639                                                       struct composite_context);
 640         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 641                                                        struct pipe_connect_state);
 642
 643         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 644         if (!composite_is_ok(c)) return;
 645
 646         continue_pipe_connect(c, s);
 647 }
 648
 649
 650 /*
 651   Stage 4 of pipe_connect_b: Start an authentication on connected dcerpc pipe
 652   depending on credentials and binding flags passed.
 653 */
 654 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s)
 655 {
 656         struct composite_context *auth_bind_req;
 657
 658         s->pipe->binding = s->binding;
 659         if (!talloc_reference(s->pipe, s->binding)) {
 660                 composite_error(c, NT_STATUS_NO_MEMORY);
 661                 return;
 662         }
 663
 664         auth_bind_req = dcerpc_pipe_auth_send(s->pipe, s->binding, s->table,
 665                                               s->credentials);
 666         composite_continue(c, auth_bind_req, continue_pipe_auth, c);
 667 }
 668
 669
 670 /*
 671   Stage 5 of pipe_connect_b: Receive result of pipe authentication request
 672   and say if all went ok
 673 */
 674 static void continue_pipe_auth(struct composite_context *ctx)
 675 {
 676         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 677                                                       struct composite_context);
 678         struct pipe_connect_state *s = talloc_get_type(c->private_data, struct pipe_connect_state);
 679
 680         c->status = dcerpc_pipe_auth_recv(ctx, s, &s->pipe);
 681         if (!composite_is_ok(c)) return;
 682
 683         composite_done(c);
 684 }
 685
 686
 687 /*
 688   handle timeouts of a dcerpc connect
 689 */
 690 static void dcerpc_connect_timeout_handler(struct event_context *ev, struct timed_event *te,
 691                                            struct timeval t, void *private)
 692 {
 693         struct composite_context *c = talloc_get_type(private, struct composite_context);
 694         composite_error(c, NT_STATUS_IO_TIMEOUT);
 695 }
 696
 697 /*
 698   start a request to open a rpc connection to a rpc pipe, using
 699   specified binding structure to determine the endpoint and options
 700 */
 701 struct composite_context* dcerpc_pipe_connect_b_send(TALLOC_CTX *parent_ctx,
 702                                                      struct dcerpc_binding *binding,
 703                                                      const struct ndr_interface_table *table,
 704                                                      struct cli_credentials *credentials,
 705                                                      struct event_context *ev)
 706 {
 707         struct composite_context *c;
 708         struct pipe_connect_state *s;
 709         struct event_context *new_ev = NULL;
 710
 711         if (ev == NULL) {
 712                 new_ev = event_context_init(parent_ctx);
 713                 if (new_ev == NULL) return NULL;
 714                 ev = new_ev;
 715         }
 716
 717         /* composite context allocation and setup */
 718         c = composite_create(parent_ctx, ev);
 719         if (c == NULL) {
 720                 talloc_free(new_ev);
 721                 return NULL;
 722         }
 723         talloc_steal(c, new_ev);
 724
 725         s = talloc_zero(c, struct pipe_connect_state);
 726         if (composite_nomem(s, c)) return c;
 727         c->private_data = s;
 728
 729         /* initialise dcerpc pipe structure */
 730         s->pipe = dcerpc_pipe_init(c, ev);
 731         if (composite_nomem(s->pipe, c)) return c;
 732
 733         /* store parameters in state structure */
 734         s->binding      = binding;
 735         s->table        = table;
 736         s->credentials  = credentials;
 737
 738         event_add_timed(c->event_ctx, c,
 739                         timeval_current_ofs(DCERPC_REQUEST_TIMEOUT, 0),
 740                         dcerpc_connect_timeout_handler, c);
 741
 742         switch (s->binding->transport) {
 743         case NCA_UNKNOWN: {
 744                 struct composite_context *binding_req;
 745                 binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
 746                                                           s->pipe->conn->event_ctx);
 747                 composite_continue(c, binding_req, continue_map_binding, c);
 748                 return c;
 749                 }
 750
 751         case NCACN_NP:
 752         case NCACN_IP_TCP:
 753         case NCALRPC:
 754                 if (!s->binding->endpoint) {
 755                         struct composite_context *binding_req;
 756                         binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
 757                                                                   s->pipe->conn->event_ctx);
 758                         composite_continue(c, binding_req, continue_map_binding, c);
 759                         return c;
 760                 }
 761
 762         default:
 763                 break;
 764         }
 765
 766         continue_connect(c, s);
 767         return c;
 768 }
 769
 770
 771 /*
 772   receive result of a request to open a rpc connection to a rpc pipe
 773 */
 774 NTSTATUS dcerpc_pipe_connect_b_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
 775                                     struct dcerpc_pipe **p)
 776 {
 777         NTSTATUS status;
 778         struct pipe_connect_state *s;
 779
 780         status = composite_wait(c);
 781
 782         if (NT_STATUS_IS_OK(status)) {
 783                 s = talloc_get_type(c->private_data, struct pipe_connect_state);
 784                 talloc_steal(mem_ctx, s->pipe);
 785                 *p = s->pipe;
 786         }
 787         talloc_free(c);
 788         return status;
 789 }
 790
 791
 792 /*
 793   open a rpc connection to a rpc pipe, using the specified
 794   binding structure to determine the endpoint and options - sync version
 795 */
 796 NTSTATUS dcerpc_pipe_connect_b(TALLOC_CTX *parent_ctx,
 797                                struct dcerpc_pipe **pp,
 798                                struct dcerpc_binding *binding,
 799                                const struct ndr_interface_table *table,
 800                                struct cli_credentials *credentials,
 801                                struct event_context *ev)
 802 {
 803         struct composite_context *c;
 804
 805         c = dcerpc_pipe_connect_b_send(parent_ctx, binding, table,
 806                                        credentials, ev);
 807         return dcerpc_pipe_connect_b_recv(c, parent_ctx, pp);
 808 }
 809
 810
 811 struct pipe_conn_state {
 812         struct dcerpc_pipe *pipe;
 813 };
 814
 815
 816 static void continue_pipe_connect_b(struct composite_context *ctx);
 817
 818
 819 /*
 820   Initiate rpc connection to a rpc pipe, using the specified string
 821   binding to determine the endpoint and options.
 822   The string is to be parsed to a binding structure first.
 823 */
 824 struct composite_context* dcerpc_pipe_connect_send(TALLOC_CTX *parent_ctx,
 825                                                    const char *binding,
 826                                                    const struct ndr_interface_table *table,
 827                                                    struct cli_credentials *credentials,
 828                                                    struct event_context *ev)
 829 {
 830         struct composite_context *c;
 831         struct pipe_conn_state *s;
 832         struct dcerpc_binding *b;
 833         struct composite_context *pipe_conn_req;
 834         struct event_context *new_ev = NULL;
 835
 836         if (ev == NULL) {
 837                 new_ev = event_context_init(parent_ctx);
 838                 if (new_ev == NULL) return NULL;
 839                 ev = new_ev;
 840         }
 841
 842         /* composite context allocation and setup */
 843         c = composite_create(parent_ctx, ev);
 844         if (c == NULL) {
 845                 talloc_free(new_ev);
 846                 return NULL;
 847         }
 848         talloc_steal(c, new_ev);
 849
 850         s = talloc_zero(c, struct pipe_conn_state);
 851         if (composite_nomem(s, c)) return c;
 852         c->private_data = s;
 853
 854         /* parse binding string to the structure */
 855         c->status = dcerpc_parse_binding(c, binding, &b);
 856         if (!NT_STATUS_IS_OK(c->status)) {
 857                 DEBUG(0, ("Failed to parse dcerpc binding '%s'\n", binding));
 858                 composite_error(c, c->status);
 859                 return c;
 860         }
 861
 862         DEBUG(3, ("Using binding %s\n", dcerpc_binding_string(c, b)));
 863
 864         /*
 865            start connecting to a rpc pipe after binding structure
 866            is established
 867          */
 868         pipe_conn_req = dcerpc_pipe_connect_b_send(c, b, table,
 869                                                    credentials, ev);
 870         composite_continue(c, pipe_conn_req, continue_pipe_connect_b, c);
 871         return c;
 872 }
 873
 874
 875 /*
 876   Stage 2 of pipe_connect: Receive result of actual pipe connect request
 877   and say if we're done ok
 878 */
 879 static void continue_pipe_connect_b(struct composite_context *ctx)
 880 {
 881         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 882                                                       struct composite_context);
 883         struct pipe_conn_state *s = talloc_get_type(c->private_data,
 884                                                     struct pipe_conn_state);
 885
 886         c->status = dcerpc_pipe_connect_b_recv(ctx, c, &s->pipe);
 887         talloc_steal(s, s->pipe);
 888         if (!composite_is_ok(c)) return;
 889
 890         composite_done(c);
 891 }
 892
 893
 894 /*
 895   Receive result of pipe connect (using binding string) request
 896   and return connected pipe structure.
 897 */
 898 NTSTATUS dcerpc_pipe_connect_recv(struct composite_context *c,
 899                                   TALLOC_CTX *mem_ctx,
 900                                   struct dcerpc_pipe **pp)
 901 {
 902         NTSTATUS status;
 903         struct pipe_conn_state *s;
 904
 905         status = composite_wait(c);
 906         if (NT_STATUS_IS_OK(status)) {
 907                 s = talloc_get_type(c->private_data, struct pipe_conn_state);
 908                 *pp = talloc_steal(mem_ctx, s->pipe);
 909         }
 910         talloc_free(c);
 911         return status;
 912 }
 913
 914
 915 /*
 916   Open a rpc connection to a rpc pipe, using the specified string
 917   binding to determine the endpoint and options - sync version
 918 */
 919 NTSTATUS dcerpc_pipe_connect(TALLOC_CTX *parent_ctx,
 920                              struct dcerpc_pipe **pp,
 921                              const char *binding,
 922                              const struct ndr_interface_table *table,
 923                              struct cli_credentials *credentials,
 924                              struct event_context *ev)
 925 {
 926         struct composite_context *c;
 927         c = dcerpc_pipe_connect_send(parent_ctx, binding,
 928                                      table,
 929                                      credentials, ev);
 930         return dcerpc_pipe_connect_recv(c, parent_ctx, pp);
 931 }
 932