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