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