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