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 "librpc/rpc/dcerpc.h"
  33 #include "librpc/rpc/dcerpc_proto.h"
  34 #include "auth/credentials/credentials.h"
  35 #include "param/param.h"
  36 #include "libcli/resolve/resolve.h"
  37
  38
  39 struct pipe_np_smb_state {
  40         struct smb_composite_connect conn;
  41         struct smbcli_tree *tree;
  42         struct dcerpc_pipe_connect io;
  43 };
  44
  45
  46 /*
  47   Stage 3 of ncacn_np_smb: Named pipe opened (or not)
  48 */
  49 static void continue_pipe_open_smb(struct composite_context *ctx)
  50 {
  51         struct composite_context *c = talloc_get_type(ctx->async.private_data,
  52                                                       struct composite_context);
  53
  54         /* receive result of named pipe open request on smb */
  55         c->status = dcerpc_pipe_open_smb_recv(ctx);
  56         if (!composite_is_ok(c)) return;
  57
  58         composite_done(c);
  59 }
  60
  61
  62 /*
  63   Stage 2 of ncacn_np_smb: Open a named pipe after successful smb connection
  64 */
  65 static void continue_smb_connect(struct composite_context *ctx)
  66 {
  67         struct composite_context *open_ctx;
  68         struct composite_context *c = talloc_get_type(ctx->async.private_data,
  69                                                       struct composite_context);
  70         struct pipe_np_smb_state *s = talloc_get_type(c->private_data,
  71                                                       struct pipe_np_smb_state);
  72
  73         /* receive result of smb connect request */
  74         c->status = smb_composite_connect_recv(ctx, c);
  75         if (!composite_is_ok(c)) return;
  76
  77         /* prepare named pipe open parameters */
  78         s->tree         = s->conn.out.tree;
  79         s->io.pipe_name = s->io.binding->endpoint;
  80
  81         /* send named pipe open request */
  82         open_ctx = dcerpc_pipe_open_smb_send(s->io.pipe, s->tree, s->io.pipe_name);
  83         if (composite_nomem(open_ctx, c)) return;
  84
  85         composite_continue(c, open_ctx, continue_pipe_open_smb, c);
  86 }
  87
  88
  89 /*
  90   Initiate async open of a rpc connection to a rpc pipe on SMB using
  91   the binding structure to determine the endpoint and options
  92 */
  93 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)
  94 {
  95         struct composite_context *c;
  96         struct pipe_np_smb_state *s;
  97         struct composite_context *conn_req;
  98         struct smb_composite_connect *conn;
  99
 100         /* composite context allocation and setup */
 101         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 102         if (c == NULL) return NULL;
 103
 104         s = talloc_zero(c, struct pipe_np_smb_state);
 105         if (composite_nomem(s, c)) return c;
 106         c->private_data = s;
 107
 108         s->io  = *io;
 109         conn   = &s->conn;
 110
 111         /* prepare smb connection parameters: we're connecting to IPC$ share on
 112            remote rpc server */
 113         conn->in.dest_host              = s->io.binding->host;
 114         conn->in.dest_ports                  = lp_smb_ports(lp_ctx);
 115         if (s->io.binding->target_hostname == NULL)
 116                 conn->in.called_name = "*SMBSERVER"; /* FIXME: This is invalid */
 117         else
 118                 conn->in.called_name            = s->io.binding->target_hostname;
 119         conn->in.service                = "IPC$";
 120         conn->in.service_type           = NULL;
 121         conn->in.workgroup              = lp_workgroup(lp_ctx);
 122
 123         lp_smbcli_options(lp_ctx, &conn->in.options);
 124
 125         /*
 126          * provide proper credentials - user supplied, but allow a
 127          * fallback to anonymous if this is an schannel connection
 128          * (might be NT4 not allowing machine logins at session
 129          * setup).
 130          */
 131         s->conn.in.credentials = s->io.creds;
 132         if (s->io.binding->flags & DCERPC_SCHANNEL) {
 133                 conn->in.fallback_to_anonymous  = true;
 134         } else {
 135                 conn->in.fallback_to_anonymous  = false;
 136         }
 137
 138         /* send smb connect request */
 139         conn_req = smb_composite_connect_send(conn, s->io.pipe->conn,
 140                                               lp_resolve_context(lp_ctx),
 141                                               s->io.pipe->conn->event_ctx);
 142         if (composite_nomem(conn_req, c)) return c;
 143
 144         composite_continue(c, conn_req, continue_smb_connect, c);
 145         return c;
 146 }
 147
 148
 149 /*
 150   Receive result of a rpc connection to a rpc pipe on SMB
 151 */
 152 static NTSTATUS dcerpc_pipe_connect_ncacn_np_smb_recv(struct composite_context *c)
 153 {
 154         NTSTATUS status = composite_wait(c);
 155
 156         talloc_free(c);
 157         return status;
 158 }
 159
 160
 161 struct pipe_np_smb2_state {
 162         struct smb2_tree *tree;
 163         struct dcerpc_pipe_connect io;
 164 };
 165
 166
 167 /*
 168   Stage 3 of ncacn_np_smb: Named pipe opened (or not)
 169 */
 170 static void continue_pipe_open_smb2(struct composite_context *ctx)
 171 {
 172         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 173                                                       struct composite_context);
 174
 175         /* receive result of named pipe open request on smb2 */
 176         c->status = dcerpc_pipe_open_smb2_recv(ctx);
 177         if (!composite_is_ok(c)) return;
 178
 179         composite_done(c);
 180 }
 181
 182
 183 /*
 184   Stage 2 of ncacn_np_smb2: Open a named pipe after successful smb2 connection
 185 */
 186 static void continue_smb2_connect(struct composite_context *ctx)
 187 {
 188         struct composite_context *open_req;
 189         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 190                                                       struct composite_context);
 191         struct pipe_np_smb2_state *s = talloc_get_type(c->private_data,
 192                                                        struct pipe_np_smb2_state);
 193
 194         /* receive result of smb2 connect request */
 195         c->status = smb2_connect_recv(ctx, c, &s->tree);
 196         if (!composite_is_ok(c)) return;
 197
 198         /* prepare named pipe open parameters */
 199         s->io.pipe_name = s->io.binding->endpoint;
 200
 201         /* send named pipe open request */
 202         open_req = dcerpc_pipe_open_smb2_send(s->io.pipe, s->tree, s->io.pipe_name);
 203         if (composite_nomem(open_req, c)) return;
 204
 205         composite_continue(c, open_req, continue_pipe_open_smb2, c);
 206 }
 207
 208
 209 /*
 210    Initiate async open of a rpc connection request on SMB2 using
 211    the binding structure to determine the endpoint and options
 212 */
 213 static struct composite_context *dcerpc_pipe_connect_ncacn_np_smb2_send(
 214                                         TALLOC_CTX *mem_ctx,
 215                                         struct dcerpc_pipe_connect *io,
 216                                         struct loadparm_context *lp_ctx)
 217 {
 218         struct composite_context *c;
 219         struct pipe_np_smb2_state *s;
 220         struct composite_context *conn_req;
 221
 222         /* composite context allocation and setup */
 223         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 224         if (c == NULL) return NULL;
 225
 226         s = talloc_zero(c, struct pipe_np_smb2_state);
 227         if (composite_nomem(s, c)) return c;
 228         c->private_data = s;
 229
 230         s->io = *io;
 231
 232         /*
 233          * provide proper credentials - user supplied or anonymous in case this is
 234          * schannel connection
 235          */
 236         if (s->io.binding->flags & DCERPC_SCHANNEL) {
 237                 s->io.creds = cli_credentials_init(mem_ctx);
 238                 if (composite_nomem(s->io.creds, c)) return c;
 239
 240                 cli_credentials_guess(s->io.creds, lp_ctx);
 241         }
 242
 243         /* send smb2 connect request */
 244         conn_req = smb2_connect_send(mem_ctx, s->io.binding->host, "IPC$",
 245                                      s->io.resolve_ctx,
 246                                      s->io.creds,
 247                                      c->event_ctx);
 248         composite_continue(c, conn_req, continue_smb2_connect, c);
 249         return c;
 250 }
 251
 252
 253 /*
 254   Receive result of a rpc connection to a rpc pipe on SMB2
 255 */
 256 static NTSTATUS dcerpc_pipe_connect_ncacn_np_smb2_recv(struct composite_context *c)
 257 {
 258         NTSTATUS status = composite_wait(c);
 259
 260         talloc_free(c);
 261         return status;
 262 }
 263
 264
 265 struct pipe_ip_tcp_state {
 266         struct dcerpc_pipe_connect io;
 267         const char *host;
 268         const char *target_hostname;
 269         uint32_t port;
 270 };
 271
 272
 273 /*
 274   Stage 2 of ncacn_ip_tcp: rpc pipe opened (or not)
 275 */
 276 static void continue_pipe_open_ncacn_ip_tcp(struct composite_context *ctx)
 277 {
 278         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 279                                                       struct composite_context);
 280
 281         /* receive result of named pipe open request on tcp/ip */
 282         c->status = dcerpc_pipe_open_tcp_recv(ctx);
 283         if (!composite_is_ok(c)) return;
 284
 285         composite_done(c);
 286 }
 287
 288
 289 /*
 290   Initiate async open of a rpc connection to a rpc pipe on TCP/IP using
 291   the binding structure to determine the endpoint and options
 292 */
 293 static struct composite_context* dcerpc_pipe_connect_ncacn_ip_tcp_send(TALLOC_CTX *mem_ctx,
 294                                                                        struct dcerpc_pipe_connect *io)
 295 {
 296         struct composite_context *c;
 297         struct pipe_ip_tcp_state *s;
 298         struct composite_context *pipe_req;
 299
 300         /* composite context allocation and setup */
 301         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 302         if (c == NULL) return NULL;
 303
 304         s = talloc_zero(c, struct pipe_ip_tcp_state);
 305         if (composite_nomem(s, c)) return c;
 306         c->private_data = s;
 307
 308         /* store input parameters in state structure */
 309         s->io               = *io;
 310         s->host             = talloc_reference(c, io->binding->host);
 311         s->target_hostname  = talloc_reference(c, io->binding->target_hostname);
 312                              /* port number is a binding endpoint here */
 313         s->port             = atoi(io->binding->endpoint);
 314
 315         /* send pipe open request on tcp/ip */
 316         pipe_req = dcerpc_pipe_open_tcp_send(s->io.pipe->conn, s->host, s->target_hostname,
 317                                              s->port, io->resolve_ctx);
 318         composite_continue(c, pipe_req, continue_pipe_open_ncacn_ip_tcp, c);
 319         return c;
 320 }
 321
 322
 323 /*
 324   Receive result of a rpc connection to a rpc pipe on TCP/IP
 325 */
 326 static NTSTATUS dcerpc_pipe_connect_ncacn_ip_tcp_recv(struct composite_context *c)
 327 {
 328         NTSTATUS status = composite_wait(c);
 329
 330         talloc_free(c);
 331         return status;
 332 }
 333
 334
 335 struct pipe_unix_state {
 336         struct dcerpc_pipe_connect io;
 337         const char *path;
 338 };
 339
 340
 341 /*
 342   Stage 2 of ncacn_unix: rpc pipe opened (or not)
 343 */
 344 static void continue_pipe_open_ncacn_unix_stream(struct composite_context *ctx)
 345 {
 346         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 347                                                       struct composite_context);
 348
 349         /* receive result of pipe open request on unix socket */
 350         c->status = dcerpc_pipe_open_unix_stream_recv(ctx);
 351         if (!composite_is_ok(c)) return;
 352
 353         composite_done(c);
 354 }
 355
 356
 357 /*
 358   Initiate async open of a rpc connection to a rpc pipe on unix socket using
 359   the binding structure to determine the endpoint and options
 360 */
 361 static struct composite_context* dcerpc_pipe_connect_ncacn_unix_stream_send(TALLOC_CTX *mem_ctx,
 362                                                                             struct dcerpc_pipe_connect *io)
 363 {
 364         struct composite_context *c;
 365         struct pipe_unix_state *s;
 366         struct composite_context *pipe_req;
 367
 368         /* composite context allocation and setup */
 369         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 370         if (c == NULL) return NULL;
 371
 372         s = talloc_zero(c, struct pipe_unix_state);
 373         if (composite_nomem(s, c)) return c;
 374         c->private_data = s;
 375
 376         /* prepare pipe open parameters and store them in state structure
 377            also, verify whether biding endpoint is not null */
 378         s->io = *io;
 379
 380         if (!io->binding->endpoint) {
 381                 DEBUG(0, ("Path to unix socket not specified\n"));
 382                 composite_error(c, NT_STATUS_INVALID_PARAMETER);
 383                 return c;
 384         }
 385
 386         s->path  = talloc_strdup(c, io->binding->endpoint);  /* path is a binding endpoint here */
 387         if (composite_nomem(s->path, c)) return c;
 388
 389         /* send pipe open request on unix socket */
 390         pipe_req = dcerpc_pipe_open_unix_stream_send(s->io.pipe->conn, s->path);
 391         composite_continue(c, pipe_req, continue_pipe_open_ncacn_unix_stream, c);
 392         return c;
 393 }
 394
 395
 396 /*
 397   Receive result of a rpc connection to a pipe on unix socket
 398 */
 399 static NTSTATUS dcerpc_pipe_connect_ncacn_unix_stream_recv(struct composite_context *c)
 400 {
 401         NTSTATUS status = composite_wait(c);
 402
 403         talloc_free(c);
 404         return status;
 405 }
 406
 407
 408 struct pipe_ncalrpc_state {
 409         struct dcerpc_pipe_connect io;
 410 };
 411
 412 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c);
 413
 414 /*
 415   Stage 2 of ncalrpc: rpc pipe opened (or not)
 416 */
 417 static void continue_pipe_open_ncalrpc(struct composite_context *ctx)
 418 {
 419         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 420                                                       struct composite_context);
 421
 422         /* receive result of pipe open request on ncalrpc */
 423         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 424         if (!composite_is_ok(c)) return;
 425
 426         composite_done(c);
 427 }
 428
 429
 430 /*
 431    Initiate async open of a rpc connection request on NCALRPC using
 432    the binding structure to determine the endpoint and options
 433 */
 434 static struct composite_context* dcerpc_pipe_connect_ncalrpc_send(TALLOC_CTX *mem_ctx,
 435                                                                   struct dcerpc_pipe_connect *io, struct loadparm_context *lp_ctx)
 436 {
 437         struct composite_context *c;
 438         struct pipe_ncalrpc_state *s;
 439         struct composite_context *pipe_req;
 440
 441         /* composite context allocation and setup */
 442         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 443         if (c == NULL) return NULL;
 444
 445         s = talloc_zero(c, struct pipe_ncalrpc_state);
 446         if (composite_nomem(s, c)) return c;
 447         c->private_data = s;
 448
 449         /* store input parameters in state structure */
 450         s->io  = *io;
 451
 452         /* send pipe open request */
 453         pipe_req = dcerpc_pipe_open_pipe_send(s->io.pipe->conn, lp_ncalrpc_dir(lp_ctx),
 454                                               s->io.binding->endpoint);
 455         composite_continue(c, pipe_req, continue_pipe_open_ncalrpc, c);
 456         return c;
 457 }
 458
 459
 460 /*
 461   Receive result of a rpc connection to a rpc pipe on NCALRPC
 462 */
 463 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c)
 464 {
 465         NTSTATUS status = composite_wait(c);
 466
 467         talloc_free(c);
 468         return status;
 469 }
 470
 471
 472 struct pipe_connect_state {
 473         struct dcerpc_pipe *pipe;
 474         struct dcerpc_binding *binding;
 475         const struct ndr_interface_table *table;
 476         struct cli_credentials *credentials;
 477         struct loadparm_context *lp_ctx;
 478 };
 479
 480
 481 static void continue_map_binding(struct composite_context *ctx);
 482 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s);
 483 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx);
 484 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx);
 485 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx);
 486 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx);
 487 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx);
 488 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s);
 489 static void continue_pipe_auth(struct composite_context *ctx);
 490
 491
 492 /*
 493   Stage 2 of pipe_connect_b: Receive result of endpoint mapping
 494 */
 495 static void continue_map_binding(struct composite_context *ctx)
 496 {
 497         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 498                                                       struct composite_context);
 499         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 500                                                        struct pipe_connect_state);
 501
 502         c->status = dcerpc_epm_map_binding_recv(ctx);
 503         if (!composite_is_ok(c)) return;
 504
 505         DEBUG(2,("Mapped to DCERPC endpoint %s\n", s->binding->endpoint));
 506
 507         continue_connect(c, s);
 508 }
 509
 510
 511 /*
 512   Stage 2 of pipe_connect_b: Continue connection after endpoint is known
 513 */
 514 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s)
 515 {
 516         struct dcerpc_pipe_connect pc;
 517
 518         /* potential exits to another stage by sending an async request */
 519         struct composite_context *ncacn_np_smb2_req;
 520         struct composite_context *ncacn_np_smb_req;
 521         struct composite_context *ncacn_ip_tcp_req;
 522         struct composite_context *ncacn_unix_req;
 523         struct composite_context *ncalrpc_req;
 524
 525         /* dcerpc pipe connect input parameters */
 526         pc.pipe         = s->pipe;
 527         pc.binding      = s->binding;
 528         pc.interface    = s->table;
 529         pc.creds        = s->credentials;
 530         pc.resolve_ctx  = lp_resolve_context(s->lp_ctx);
 531
 532         /* connect dcerpc pipe depending on required transport */
 533         switch (s->binding->transport) {
 534         case NCACN_NP:
 535                 if (pc.binding->flags & DCERPC_SMB2) {
 536                         /* new varient of SMB a.k.a. SMB2 */
 537                         ncacn_np_smb2_req = dcerpc_pipe_connect_ncacn_np_smb2_send(c, &pc, s->lp_ctx);
 538                         composite_continue(c, ncacn_np_smb2_req, continue_pipe_connect_ncacn_np_smb2, c);
 539                         return;
 540
 541                 } else {
 542                         /* good old ordinary SMB */
 543                         ncacn_np_smb_req = dcerpc_pipe_connect_ncacn_np_smb_send(c, &pc, s->lp_ctx);
 544                         composite_continue(c, ncacn_np_smb_req, continue_pipe_connect_ncacn_np_smb, c);
 545                         return;
 546                 }
 547                 break;
 548
 549         case NCACN_IP_TCP:
 550                 ncacn_ip_tcp_req = dcerpc_pipe_connect_ncacn_ip_tcp_send(c, &pc);
 551                 composite_continue(c, ncacn_ip_tcp_req, continue_pipe_connect_ncacn_ip_tcp, c);
 552                 return;
 553
 554         case NCACN_UNIX_STREAM:
 555                 ncacn_unix_req = dcerpc_pipe_connect_ncacn_unix_stream_send(c, &pc);
 556                 composite_continue(c, ncacn_unix_req, continue_pipe_connect_ncacn_unix, c);
 557                 return;
 558
 559         case NCALRPC:
 560                 ncalrpc_req = dcerpc_pipe_connect_ncalrpc_send(c, &pc, s->lp_ctx);
 561                 composite_continue(c, ncalrpc_req, continue_pipe_connect_ncalrpc, c);
 562                 return;
 563
 564         default:
 565                 /* looks like a transport we don't support now */
 566                 composite_error(c, NT_STATUS_NOT_SUPPORTED);
 567         }
 568 }
 569
 570
 571 /*
 572   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 573   named pipe on smb2
 574 */
 575 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx)
 576 {
 577         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 578                                                       struct composite_context);
 579         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 580                                                        struct pipe_connect_state);
 581
 582         c->status = dcerpc_pipe_connect_ncacn_np_smb2_recv(ctx);
 583         if (!composite_is_ok(c)) return;
 584
 585         continue_pipe_connect(c, s);
 586 }
 587
 588
 589 /*
 590   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 591   named pipe on smb
 592 */
 593 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx)
 594 {
 595         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 596                                                       struct composite_context);
 597         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 598                                                        struct pipe_connect_state);
 599
 600         c->status = dcerpc_pipe_connect_ncacn_np_smb_recv(ctx);
 601         if (!composite_is_ok(c)) return;
 602
 603         continue_pipe_connect(c, s);
 604 }
 605
 606
 607 /*
 608   Stage 3 of pipe_connect_b: Receive result of pipe connect request on tcp/ip
 609 */
 610 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx)
 611 {
 612         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 613                                                       struct composite_context);
 614         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 615                                                        struct pipe_connect_state);
 616
 617         c->status = dcerpc_pipe_connect_ncacn_ip_tcp_recv(ctx);
 618         if (!composite_is_ok(c)) return;
 619
 620         continue_pipe_connect(c, s);
 621 }
 622
 623
 624 /*
 625   Stage 3 of pipe_connect_b: Receive result of pipe connect request on unix socket
 626 */
 627 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx)
 628 {
 629         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 630                                                       struct composite_context);
 631         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 632                                                        struct pipe_connect_state);
 633
 634         c->status = dcerpc_pipe_connect_ncacn_unix_stream_recv(ctx);
 635         if (!composite_is_ok(c)) return;
 636
 637         continue_pipe_connect(c, s);
 638 }
 639
 640
 641 /*
 642   Stage 3 of pipe_connect_b: Receive result of pipe connect request on local rpc
 643 */
 644 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx)
 645 {
 646         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 647                                                       struct composite_context);
 648         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 649                                                        struct pipe_connect_state);
 650
 651         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 652         if (!composite_is_ok(c)) return;
 653
 654         continue_pipe_connect(c, s);
 655 }
 656
 657
 658 /*
 659   Stage 4 of pipe_connect_b: Start an authentication on connected dcerpc pipe
 660   depending on credentials and binding flags passed.
 661 */
 662 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s)
 663 {
 664         struct composite_context *auth_bind_req;
 665
 666         s->pipe->binding = s->binding;
 667         if (!talloc_reference(s->pipe, s->binding)) {
 668                 composite_error(c, NT_STATUS_NO_MEMORY);
 669                 return;
 670         }
 671
 672         auth_bind_req = dcerpc_pipe_auth_send(s->pipe, s->binding, s->table,
 673                                               s->credentials, s->lp_ctx);
 674         composite_continue(c, auth_bind_req, continue_pipe_auth, c);
 675 }
 676
 677
 678 /*
 679   Stage 5 of pipe_connect_b: Receive result of pipe authentication request
 680   and say if all went ok
 681 */
 682 static void continue_pipe_auth(struct composite_context *ctx)
 683 {
 684         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 685                                                       struct composite_context);
 686         struct pipe_connect_state *s = talloc_get_type(c->private_data, struct pipe_connect_state);
 687
 688         c->status = dcerpc_pipe_auth_recv(ctx, s, &s->pipe);
 689         if (!composite_is_ok(c)) return;
 690
 691         composite_done(c);
 692 }
 693
 694
 695 /*
 696   handle timeouts of a dcerpc connect
 697 */
 698 static void dcerpc_connect_timeout_handler(struct event_context *ev, struct timed_event *te,
 699                                            struct timeval t, void *private)
 700 {
 701         struct composite_context *c = talloc_get_type(private, struct composite_context);
 702         composite_error(c, NT_STATUS_IO_TIMEOUT);
 703 }
 704
 705 /*
 706   start a request to open a rpc connection to a rpc pipe, using
 707   specified binding structure to determine the endpoint and options
 708 */
 709 _PUBLIC_ struct composite_context* dcerpc_pipe_connect_b_send(TALLOC_CTX *parent_ctx,
 710                                                      struct dcerpc_binding *binding,
 711                                                      const struct ndr_interface_table *table,
 712                                                      struct cli_credentials *credentials,
 713                                                      struct event_context *ev,
 714                                                      struct loadparm_context *lp_ctx)
 715 {
 716         struct composite_context *c;
 717         struct pipe_connect_state *s;
 718         struct event_context *new_ev = NULL;
 719
 720         if (ev == NULL) {
 721                 new_ev = event_context_init(parent_ctx);
 722                 if (new_ev == NULL) return NULL;
 723                 ev = new_ev;
 724         }
 725
 726         /* composite context allocation and setup */
 727         c = composite_create(parent_ctx, ev);
 728         if (c == NULL) {
 729                 talloc_free(new_ev);
 730                 return NULL;
 731         }
 732         talloc_steal(c, new_ev);
 733
 734         s = talloc_zero(c, struct pipe_connect_state);
 735         if (composite_nomem(s, c)) return c;
 736         c->private_data = s;
 737
 738         /* initialise dcerpc pipe structure */
 739         s->pipe = dcerpc_pipe_init(c, ev, lp_iconv_convenience(lp_ctx));
 740         if (composite_nomem(s->pipe, c)) return c;
 741
 742         /* store parameters in state structure */
 743         s->binding      = binding;
 744         s->table        = table;
 745         s->credentials  = credentials;
 746         s->lp_ctx       = lp_ctx;
 747
 748         event_add_timed(c->event_ctx, c,
 749                         timeval_current_ofs(DCERPC_REQUEST_TIMEOUT, 0),
 750                         dcerpc_connect_timeout_handler, c);
 751
 752         switch (s->binding->transport) {
 753         case NCA_UNKNOWN: {
 754                 struct composite_context *binding_req;
 755                 binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
 756                                                           s->pipe->conn->event_ctx,
 757                                                           s->lp_ctx);
 758                 composite_continue(c, binding_req, continue_map_binding, c);
 759                 return c;
 760                 }
 761
 762         case NCACN_NP:
 763         case NCACN_IP_TCP:
 764         case NCALRPC:
 765                 if (!s->binding->endpoint) {
 766                         struct composite_context *binding_req;
 767                         binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
 768                                                                   s->pipe->conn->event_ctx,
 769                                                                   s->lp_ctx);
 770                         composite_continue(c, binding_req, continue_map_binding, c);
 771                         return c;
 772                 }
 773
 774         default:
 775                 break;
 776         }
 777
 778         continue_connect(c, s);
 779         return c;
 780 }
 781
 782
 783 /*
 784   receive result of a request to open a rpc connection to a rpc pipe
 785 */
 786 _PUBLIC_ NTSTATUS dcerpc_pipe_connect_b_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
 787                                     struct dcerpc_pipe **p)
 788 {
 789         NTSTATUS status;
 790         struct pipe_connect_state *s;
 791
 792         status = composite_wait(c);
 793
 794         if (NT_STATUS_IS_OK(status)) {
 795                 s = talloc_get_type(c->private_data, struct pipe_connect_state);
 796                 talloc_steal(mem_ctx, s->pipe);
 797                 *p = s->pipe;
 798         }
 799         talloc_free(c);
 800         return status;
 801 }
 802
 803
 804 /*
 805   open a rpc connection to a rpc pipe, using the specified
 806   binding structure to determine the endpoint and options - sync version
 807 */
 808 _PUBLIC_ NTSTATUS dcerpc_pipe_connect_b(TALLOC_CTX *parent_ctx,
 809                                struct dcerpc_pipe **pp,
 810                                struct dcerpc_binding *binding,
 811                                const struct ndr_interface_table *table,
 812                                struct cli_credentials *credentials,
 813                                struct event_context *ev,
 814                                struct loadparm_context *lp_ctx)
 815 {
 816         struct composite_context *c;
 817
 818         c = dcerpc_pipe_connect_b_send(parent_ctx, binding, table,
 819                                        credentials, ev, lp_ctx);
 820         return dcerpc_pipe_connect_b_recv(c, parent_ctx, pp);
 821 }
 822
 823
 824 struct pipe_conn_state {
 825         struct dcerpc_pipe *pipe;
 826 };
 827
 828
 829 static void continue_pipe_connect_b(struct composite_context *ctx);
 830
 831
 832 /*
 833   Initiate rpc connection to a rpc pipe, using the specified string
 834   binding to determine the endpoint and options.
 835   The string is to be parsed to a binding structure first.
 836 */
 837 _PUBLIC_ struct composite_context* dcerpc_pipe_connect_send(TALLOC_CTX *parent_ctx,
 838                                                    const char *binding,
 839                                                    const struct ndr_interface_table *table,
 840                                                    struct cli_credentials *credentials,
 841                                                    struct event_context *ev, struct loadparm_context *lp_ctx)
 842 {
 843         struct composite_context *c;
 844         struct pipe_conn_state *s;
 845         struct dcerpc_binding *b;
 846         struct composite_context *pipe_conn_req;
 847         struct event_context *new_ev = NULL;
 848
 849         if (ev == NULL) {
 850                 new_ev = event_context_init(parent_ctx);
 851                 if (new_ev == NULL) return NULL;
 852                 ev = new_ev;
 853         }
 854
 855         /* composite context allocation and setup */
 856         c = composite_create(parent_ctx, ev);
 857         if (c == NULL) {
 858                 talloc_free(new_ev);
 859                 return NULL;
 860         }
 861         talloc_steal(c, new_ev);
 862
 863         s = talloc_zero(c, struct pipe_conn_state);
 864         if (composite_nomem(s, c)) return c;
 865         c->private_data = s;
 866
 867         /* parse binding string to the structure */
 868         c->status = dcerpc_parse_binding(c, binding, &b);
 869         if (!NT_STATUS_IS_OK(c->status)) {
 870                 DEBUG(0, ("Failed to parse dcerpc binding '%s'\n", binding));
 871                 composite_error(c, c->status);
 872                 return c;
 873         }
 874
 875         DEBUG(3, ("Using binding %s\n", dcerpc_binding_string(c, b)));
 876
 877         /*
 878            start connecting to a rpc pipe after binding structure
 879            is established
 880          */
 881         pipe_conn_req = dcerpc_pipe_connect_b_send(c, b, table,
 882                                                    credentials, ev, lp_ctx);
 883         composite_continue(c, pipe_conn_req, continue_pipe_connect_b, c);
 884         return c;
 885 }
 886
 887
 888 /*
 889   Stage 2 of pipe_connect: Receive result of actual pipe connect request
 890   and say if we're done ok
 891 */
 892 static void continue_pipe_connect_b(struct composite_context *ctx)
 893 {
 894         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 895                                                       struct composite_context);
 896         struct pipe_conn_state *s = talloc_get_type(c->private_data,
 897                                                     struct pipe_conn_state);
 898
 899         c->status = dcerpc_pipe_connect_b_recv(ctx, c, &s->pipe);
 900         talloc_steal(s, s->pipe);
 901         if (!composite_is_ok(c)) return;
 902
 903         composite_done(c);
 904 }
 905
 906
 907 /*
 908   Receive result of pipe connect (using binding string) request
 909   and return connected pipe structure.
 910 */
 911 NTSTATUS dcerpc_pipe_connect_recv(struct composite_context *c,
 912                                   TALLOC_CTX *mem_ctx,
 913                                   struct dcerpc_pipe **pp)
 914 {
 915         NTSTATUS status;
 916         struct pipe_conn_state *s;
 917
 918         status = composite_wait(c);
 919         if (NT_STATUS_IS_OK(status)) {
 920                 s = talloc_get_type(c->private_data, struct pipe_conn_state);
 921                 *pp = talloc_steal(mem_ctx, s->pipe);
 922         }
 923         talloc_free(c);
 924         return status;
 925 }
 926
 927
 928 /*
 929   Open a rpc connection to a rpc pipe, using the specified string
 930   binding to determine the endpoint and options - sync version
 931 */
 932 _PUBLIC_ NTSTATUS dcerpc_pipe_connect(TALLOC_CTX *parent_ctx,
 933                              struct dcerpc_pipe **pp,
 934                              const char *binding,
 935                              const struct ndr_interface_table *table,
 936                              struct cli_credentials *credentials,
 937                              struct event_context *ev,
 938                              struct loadparm_context *lp_ctx)
 939 {
 940         struct composite_context *c;
 941         c = dcerpc_pipe_connect_send(parent_ctx, binding,
 942                                      table, credentials, ev, lp_ctx);
 943         return dcerpc_pipe_connect_recv(c, parent_ctx, pp);
 944 }
 945