source4/librpc/rpc/dcerpc_connect.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    dcerpc connect functions
   5
   6    Copyright (C) Andrew Tridgell 2003
   7    Copyright (C) Jelmer Vernooij 2004
   8    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2007
   9    Copyright (C) Rafal Szczesniak  2005
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25
  26 #include "includes.h"
  27 #include "libcli/composite/composite.h"
  28 #include "libcli/smb_composite/smb_composite.h"
  29 #include "lib/events/events.h"
  30 #include "libcli/smb2/smb2.h"
  31 #include "libcli/smb2/smb2_calls.h"
  32 #include "librpc/rpc/dcerpc.h"
  33 #include "librpc/rpc/dcerpc_proto.h"
  34 #include "auth/credentials/credentials.h"
  35 #include "param/param.h"
  36 #include "libcli/resolve/resolve.h"
  37
  38
  39 struct pipe_np_smb_state {
  40         struct smb_composite_connect conn;
  41         struct smbcli_tree *tree;
  42         struct dcerpc_pipe_connect io;
  43 };
  44
  45
  46 /*
  47   Stage 3 of ncacn_np_smb: Named pipe opened (or not)
  48 */
  49 static void continue_pipe_open_smb(struct composite_context *ctx)
  50 {
  51         struct composite_context *c = talloc_get_type(ctx->async.private_data,
  52                                                       struct composite_context);
  53
  54         /* receive result of named pipe open request on smb */
  55         c->status = dcerpc_pipe_open_smb_recv(ctx);
  56         if (!composite_is_ok(c)) return;
  57
  58         composite_done(c);
  59 }
  60
  61
  62 /*
  63   Stage 2 of ncacn_np_smb: Open a named pipe after successful smb connection
  64 */
  65 static void continue_smb_connect(struct composite_context *ctx)
  66 {
  67         struct composite_context *open_ctx;
  68         struct composite_context *c = talloc_get_type(ctx->async.private_data,
  69                                                       struct composite_context);
  70         struct pipe_np_smb_state *s = talloc_get_type(c->private_data,
  71                                                       struct pipe_np_smb_state);
  72
  73         /* receive result of smb connect request */
  74         c->status = smb_composite_connect_recv(ctx, c);
  75         if (!composite_is_ok(c)) return;
  76
  77         /* prepare named pipe open parameters */
  78         s->tree         = s->conn.out.tree;
  79         s->io.pipe_name = s->io.binding->endpoint;
  80
  81         /* send named pipe open request */
  82         open_ctx = dcerpc_pipe_open_smb_send(s->io.pipe, s->tree, s->io.pipe_name);
  83         if (composite_nomem(open_ctx, c)) return;
  84
  85         composite_continue(c, open_ctx, continue_pipe_open_smb, c);
  86 }
  87
  88
  89 /*
  90   Initiate async open of a rpc connection to a rpc pipe on SMB using
  91   the binding structure to determine the endpoint and options
  92 */
  93 static struct composite_context *dcerpc_pipe_connect_ncacn_np_smb_send(TALLOC_CTX *mem_ctx, struct dcerpc_pipe_connect *io, struct loadparm_context *lp_ctx)
  94 {
  95         struct composite_context *c;
  96         struct pipe_np_smb_state *s;
  97         struct composite_context *conn_req;
  98         struct smb_composite_connect *conn;
  99
 100         /* composite context allocation and setup */
 101         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 102         if (c == NULL) return NULL;
 103
 104         s = talloc_zero(c, struct pipe_np_smb_state);
 105         if (composite_nomem(s, c)) return c;
 106         c->private_data = s;
 107
 108         s->io  = *io;
 109         conn   = &s->conn;
 110
 111         /* prepare smb connection parameters: we're connecting to IPC$ share on
 112            remote rpc server */
 113         conn->in.dest_host              = s->io.binding->host;
 114         conn->in.dest_ports                  = lp_smb_ports(lp_ctx);
 115         if (s->io.binding->target_hostname == NULL)
 116                 conn->in.called_name = "*SMBSERVER"; /* FIXME: This is invalid */
 117         else
 118                 conn->in.called_name            = s->io.binding->target_hostname;
 119         conn->in.service                = "IPC$";
 120         conn->in.service_type           = NULL;
 121         conn->in.workgroup              = lp_workgroup(lp_ctx);
 122
 123         conn->in.iconv_convenience = lp_iconv_convenience(lp_ctx);
 124
 125         lp_smbcli_options(lp_ctx, &conn->in.options);
 126         lp_smbcli_session_options(lp_ctx, &conn->in.session_options);
 127
 128         /*
 129          * provide proper credentials - user supplied, but allow a
 130          * fallback to anonymous if this is an schannel connection
 131          * (might be NT4 not allowing machine logins at session
 132          * setup).
 133          */
 134         s->conn.in.credentials = s->io.creds;
 135         if (s->io.binding->flags & DCERPC_SCHANNEL) {
 136                 conn->in.fallback_to_anonymous  = true;
 137         } else {
 138                 conn->in.fallback_to_anonymous  = false;
 139         }
 140
 141         /* send smb connect request */
 142         conn_req = smb_composite_connect_send(conn, s->io.pipe->conn,
 143                                               s->io.resolve_ctx,
 144                                               s->io.pipe->conn->event_ctx);
 145         if (composite_nomem(conn_req, c)) return c;
 146
 147         composite_continue(c, conn_req, continue_smb_connect, c);
 148         return c;
 149 }
 150
 151
 152 /*
 153   Receive result of a rpc connection to a rpc pipe on SMB
 154 */
 155 static NTSTATUS dcerpc_pipe_connect_ncacn_np_smb_recv(struct composite_context *c)
 156 {
 157         NTSTATUS status = composite_wait(c);
 158
 159         talloc_free(c);
 160         return status;
 161 }
 162
 163
 164 struct pipe_np_smb2_state {
 165         struct smb2_tree *tree;
 166         struct dcerpc_pipe_connect io;
 167 };
 168
 169
 170 /*
 171   Stage 3 of ncacn_np_smb: Named pipe opened (or not)
 172 */
 173 static void continue_pipe_open_smb2(struct composite_context *ctx)
 174 {
 175         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 176                                                       struct composite_context);
 177
 178         /* receive result of named pipe open request on smb2 */
 179         c->status = dcerpc_pipe_open_smb2_recv(ctx);
 180         if (!composite_is_ok(c)) return;
 181
 182         composite_done(c);
 183 }
 184
 185
 186 /*
 187   Stage 2 of ncacn_np_smb2: Open a named pipe after successful smb2 connection
 188 */
 189 static void continue_smb2_connect(struct composite_context *ctx)
 190 {
 191         struct composite_context *open_req;
 192         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 193                                                       struct composite_context);
 194         struct pipe_np_smb2_state *s = talloc_get_type(c->private_data,
 195                                                        struct pipe_np_smb2_state);
 196
 197         /* receive result of smb2 connect request */
 198         c->status = smb2_connect_recv(ctx, c, &s->tree);
 199         if (!composite_is_ok(c)) return;
 200
 201         /* prepare named pipe open parameters */
 202         s->io.pipe_name = s->io.binding->endpoint;
 203
 204         /* send named pipe open request */
 205         open_req = dcerpc_pipe_open_smb2_send(s->io.pipe, s->tree, s->io.pipe_name);
 206         if (composite_nomem(open_req, c)) return;
 207
 208         composite_continue(c, open_req, continue_pipe_open_smb2, c);
 209 }
 210
 211
 212 /*
 213    Initiate async open of a rpc connection request on SMB2 using
 214    the binding structure to determine the endpoint and options
 215 */
 216 static struct composite_context *dcerpc_pipe_connect_ncacn_np_smb2_send(
 217                                         TALLOC_CTX *mem_ctx,
 218                                         struct dcerpc_pipe_connect *io,
 219                                         struct loadparm_context *lp_ctx)
 220 {
 221         struct composite_context *c;
 222         struct pipe_np_smb2_state *s;
 223         struct composite_context *conn_req;
 224         struct smbcli_options options;
 225
 226         /* composite context allocation and setup */
 227         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 228         if (c == NULL) return NULL;
 229
 230         s = talloc_zero(c, struct pipe_np_smb2_state);
 231         if (composite_nomem(s, c)) return c;
 232         c->private_data = s;
 233
 234         s->io = *io;
 235
 236         /*
 237          * provide proper credentials - user supplied or anonymous in case this is
 238          * schannel connection
 239          */
 240         if (s->io.binding->flags & DCERPC_SCHANNEL) {
 241                 s->io.creds = cli_credentials_init(mem_ctx);
 242                 if (composite_nomem(s->io.creds, c)) return c;
 243
 244                 cli_credentials_guess(s->io.creds, lp_ctx);
 245         }
 246
 247         lp_smbcli_options(lp_ctx, &options);
 248
 249         /* send smb2 connect request */
 250         conn_req = smb2_connect_send(mem_ctx, s->io.binding->host,
 251                         lp_parm_string_list(mem_ctx, lp_ctx, NULL, "smb2", "ports", NULL),
 252                                         "IPC$",
 253                                      s->io.resolve_ctx,
 254                                      s->io.creds,
 255                                      c->event_ctx,
 256                                      &options);
 257         composite_continue(c, conn_req, continue_smb2_connect, c);
 258         return c;
 259 }
 260
 261
 262 /*
 263   Receive result of a rpc connection to a rpc pipe on SMB2
 264 */
 265 static NTSTATUS dcerpc_pipe_connect_ncacn_np_smb2_recv(struct composite_context *c)
 266 {
 267         NTSTATUS status = composite_wait(c);
 268
 269         talloc_free(c);
 270         return status;
 271 }
 272
 273
 274 struct pipe_ip_tcp_state {
 275         struct dcerpc_pipe_connect io;
 276         const char *host;
 277         const char *target_hostname;
 278         uint32_t port;
 279 };
 280
 281
 282 /*
 283   Stage 2 of ncacn_ip_tcp: rpc pipe opened (or not)
 284 */
 285 static void continue_pipe_open_ncacn_ip_tcp(struct composite_context *ctx)
 286 {
 287         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 288                                                       struct composite_context);
 289
 290         /* receive result of named pipe open request on tcp/ip */
 291         c->status = dcerpc_pipe_open_tcp_recv(ctx);
 292         if (!composite_is_ok(c)) return;
 293
 294         composite_done(c);
 295 }
 296
 297
 298 /*
 299   Initiate async open of a rpc connection to a rpc pipe on TCP/IP using
 300   the binding structure to determine the endpoint and options
 301 */
 302 static struct composite_context* dcerpc_pipe_connect_ncacn_ip_tcp_send(TALLOC_CTX *mem_ctx,
 303                                                                        struct dcerpc_pipe_connect *io)
 304 {
 305         struct composite_context *c;
 306         struct pipe_ip_tcp_state *s;
 307         struct composite_context *pipe_req;
 308
 309         /* composite context allocation and setup */
 310         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 311         if (c == NULL) return NULL;
 312
 313         s = talloc_zero(c, struct pipe_ip_tcp_state);
 314         if (composite_nomem(s, c)) return c;
 315         c->private_data = s;
 316
 317         /* store input parameters in state structure */
 318         s->io               = *io;
 319         s->host             = talloc_reference(c, io->binding->host);
 320         s->target_hostname  = talloc_reference(c, io->binding->target_hostname);
 321                              /* port number is a binding endpoint here */
 322         s->port             = atoi(io->binding->endpoint);
 323
 324         /* send pipe open request on tcp/ip */
 325         pipe_req = dcerpc_pipe_open_tcp_send(s->io.pipe->conn, s->host, s->target_hostname,
 326                                              s->port, io->resolve_ctx);
 327         composite_continue(c, pipe_req, continue_pipe_open_ncacn_ip_tcp, c);
 328         return c;
 329 }
 330
 331
 332 /*
 333   Receive result of a rpc connection to a rpc pipe on TCP/IP
 334 */
 335 static NTSTATUS dcerpc_pipe_connect_ncacn_ip_tcp_recv(struct composite_context *c)
 336 {
 337         NTSTATUS status = composite_wait(c);
 338
 339         talloc_free(c);
 340         return status;
 341 }
 342
 343
 344 struct pipe_unix_state {
 345         struct dcerpc_pipe_connect io;
 346         const char *path;
 347 };
 348
 349
 350 /*
 351   Stage 2 of ncacn_unix: rpc pipe opened (or not)
 352 */
 353 static void continue_pipe_open_ncacn_unix_stream(struct composite_context *ctx)
 354 {
 355         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 356                                                       struct composite_context);
 357
 358         /* receive result of pipe open request on unix socket */
 359         c->status = dcerpc_pipe_open_unix_stream_recv(ctx);
 360         if (!composite_is_ok(c)) return;
 361
 362         composite_done(c);
 363 }
 364
 365
 366 /*
 367   Initiate async open of a rpc connection to a rpc pipe on unix socket using
 368   the binding structure to determine the endpoint and options
 369 */
 370 static struct composite_context* dcerpc_pipe_connect_ncacn_unix_stream_send(TALLOC_CTX *mem_ctx,
 371                                                                             struct dcerpc_pipe_connect *io)
 372 {
 373         struct composite_context *c;
 374         struct pipe_unix_state *s;
 375         struct composite_context *pipe_req;
 376
 377         /* composite context allocation and setup */
 378         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 379         if (c == NULL) return NULL;
 380
 381         s = talloc_zero(c, struct pipe_unix_state);
 382         if (composite_nomem(s, c)) return c;
 383         c->private_data = s;
 384
 385         /* prepare pipe open parameters and store them in state structure
 386            also, verify whether biding endpoint is not null */
 387         s->io = *io;
 388
 389         if (!io->binding->endpoint) {
 390                 DEBUG(0, ("Path to unix socket not specified\n"));
 391                 composite_error(c, NT_STATUS_INVALID_PARAMETER);
 392                 return c;
 393         }
 394
 395         s->path  = talloc_strdup(c, io->binding->endpoint);  /* path is a binding endpoint here */
 396         if (composite_nomem(s->path, c)) return c;
 397
 398         /* send pipe open request on unix socket */
 399         pipe_req = dcerpc_pipe_open_unix_stream_send(s->io.pipe->conn, s->path);
 400         composite_continue(c, pipe_req, continue_pipe_open_ncacn_unix_stream, c);
 401         return c;
 402 }
 403
 404
 405 /*
 406   Receive result of a rpc connection to a pipe on unix socket
 407 */
 408 static NTSTATUS dcerpc_pipe_connect_ncacn_unix_stream_recv(struct composite_context *c)
 409 {
 410         NTSTATUS status = composite_wait(c);
 411
 412         talloc_free(c);
 413         return status;
 414 }
 415
 416
 417 struct pipe_ncalrpc_state {
 418         struct dcerpc_pipe_connect io;
 419 };
 420
 421 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c);
 422
 423 /*
 424   Stage 2 of ncalrpc: rpc pipe opened (or not)
 425 */
 426 static void continue_pipe_open_ncalrpc(struct composite_context *ctx)
 427 {
 428         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 429                                                       struct composite_context);
 430
 431         /* receive result of pipe open request on ncalrpc */
 432         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 433         if (!composite_is_ok(c)) return;
 434
 435         composite_done(c);
 436 }
 437
 438
 439 /*
 440    Initiate async open of a rpc connection request on NCALRPC using
 441    the binding structure to determine the endpoint and options
 442 */
 443 static struct composite_context* dcerpc_pipe_connect_ncalrpc_send(TALLOC_CTX *mem_ctx,
 444                                                                   struct dcerpc_pipe_connect *io, struct loadparm_context *lp_ctx)
 445 {
 446         struct composite_context *c;
 447         struct pipe_ncalrpc_state *s;
 448         struct composite_context *pipe_req;
 449
 450         /* composite context allocation and setup */
 451         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 452         if (c == NULL) return NULL;
 453
 454         s = talloc_zero(c, struct pipe_ncalrpc_state);
 455         if (composite_nomem(s, c)) return c;
 456         c->private_data = s;
 457
 458         /* store input parameters in state structure */
 459         s->io  = *io;
 460
 461         /* send pipe open request */
 462         pipe_req = dcerpc_pipe_open_pipe_send(s->io.pipe->conn, lp_ncalrpc_dir(lp_ctx),
 463                                               s->io.binding->endpoint);
 464         composite_continue(c, pipe_req, continue_pipe_open_ncalrpc, c);
 465         return c;
 466 }
 467
 468
 469 /*
 470   Receive result of a rpc connection to a rpc pipe on NCALRPC
 471 */
 472 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c)
 473 {
 474         NTSTATUS status = composite_wait(c);
 475
 476         talloc_free(c);
 477         return status;
 478 }
 479
 480
 481 struct pipe_connect_state {
 482         struct dcerpc_pipe *pipe;
 483         struct dcerpc_binding *binding;
 484         const struct ndr_interface_table *table;
 485         struct cli_credentials *credentials;
 486         struct loadparm_context *lp_ctx;
 487 };
 488
 489
 490 static void continue_map_binding(struct composite_context *ctx);
 491 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s);
 492 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx);
 493 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx);
 494 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx);
 495 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx);
 496 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx);
 497 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s);
 498 static void continue_pipe_auth(struct composite_context *ctx);
 499
 500
 501 /*
 502   Stage 2 of pipe_connect_b: Receive result of endpoint mapping
 503 */
 504 static void continue_map_binding(struct composite_context *ctx)
 505 {
 506         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 507                                                       struct composite_context);
 508         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 509                                                        struct pipe_connect_state);
 510
 511         c->status = dcerpc_epm_map_binding_recv(ctx);
 512         if (!composite_is_ok(c)) return;
 513
 514         DEBUG(2,("Mapped to DCERPC endpoint %s\n", s->binding->endpoint));
 515
 516         continue_connect(c, s);
 517 }
 518
 519
 520 /*
 521   Stage 2 of pipe_connect_b: Continue connection after endpoint is known
 522 */
 523 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s)
 524 {
 525         struct dcerpc_pipe_connect pc;
 526
 527         /* potential exits to another stage by sending an async request */
 528         struct composite_context *ncacn_np_smb2_req;
 529         struct composite_context *ncacn_np_smb_req;
 530         struct composite_context *ncacn_ip_tcp_req;
 531         struct composite_context *ncacn_unix_req;
 532         struct composite_context *ncalrpc_req;
 533
 534         /* dcerpc pipe connect input parameters */
 535         pc.pipe         = s->pipe;
 536         pc.binding      = s->binding;
 537         pc.interface    = s->table;
 538         pc.creds        = s->credentials;
 539         pc.resolve_ctx  = lp_resolve_context(s->lp_ctx);
 540
 541         /* connect dcerpc pipe depending on required transport */
 542         switch (s->binding->transport) {
 543         case NCACN_NP:
 544                 if (pc.binding->flags & DCERPC_SMB2) {
 545                         /* new varient of SMB a.k.a. SMB2 */
 546                         ncacn_np_smb2_req = dcerpc_pipe_connect_ncacn_np_smb2_send(c, &pc, s->lp_ctx);
 547                         composite_continue(c, ncacn_np_smb2_req, continue_pipe_connect_ncacn_np_smb2, c);
 548                         return;
 549
 550                 } else {
 551                         /* good old ordinary SMB */
 552                         ncacn_np_smb_req = dcerpc_pipe_connect_ncacn_np_smb_send(c, &pc, s->lp_ctx);
 553                         composite_continue(c, ncacn_np_smb_req, continue_pipe_connect_ncacn_np_smb, c);
 554                         return;
 555                 }
 556                 break;
 557
 558         case NCACN_IP_TCP:
 559                 ncacn_ip_tcp_req = dcerpc_pipe_connect_ncacn_ip_tcp_send(c, &pc);
 560                 composite_continue(c, ncacn_ip_tcp_req, continue_pipe_connect_ncacn_ip_tcp, c);
 561                 return;
 562
 563         case NCACN_UNIX_STREAM:
 564                 ncacn_unix_req = dcerpc_pipe_connect_ncacn_unix_stream_send(c, &pc);
 565                 composite_continue(c, ncacn_unix_req, continue_pipe_connect_ncacn_unix, c);
 566                 return;
 567
 568         case NCALRPC:
 569                 ncalrpc_req = dcerpc_pipe_connect_ncalrpc_send(c, &pc, s->lp_ctx);
 570                 composite_continue(c, ncalrpc_req, continue_pipe_connect_ncalrpc, c);
 571                 return;
 572
 573         default:
 574                 /* looks like a transport we don't support now */
 575                 composite_error(c, NT_STATUS_NOT_SUPPORTED);
 576         }
 577 }
 578
 579
 580 /*
 581   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 582   named pipe on smb2
 583 */
 584 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx)
 585 {
 586         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 587                                                       struct composite_context);
 588         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 589                                                        struct pipe_connect_state);
 590
 591         c->status = dcerpc_pipe_connect_ncacn_np_smb2_recv(ctx);
 592         if (!composite_is_ok(c)) return;
 593
 594         continue_pipe_connect(c, s);
 595 }
 596
 597
 598 /*
 599   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 600   named pipe on smb
 601 */
 602 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx)
 603 {
 604         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 605                                                       struct composite_context);
 606         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 607                                                        struct pipe_connect_state);
 608
 609         c->status = dcerpc_pipe_connect_ncacn_np_smb_recv(ctx);
 610         if (!composite_is_ok(c)) return;
 611
 612         continue_pipe_connect(c, s);
 613 }
 614
 615
 616 /*
 617   Stage 3 of pipe_connect_b: Receive result of pipe connect request on tcp/ip
 618 */
 619 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx)
 620 {
 621         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 622                                                       struct composite_context);
 623         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 624                                                        struct pipe_connect_state);
 625
 626         c->status = dcerpc_pipe_connect_ncacn_ip_tcp_recv(ctx);
 627         if (!composite_is_ok(c)) return;
 628
 629         continue_pipe_connect(c, s);
 630 }
 631
 632
 633 /*
 634   Stage 3 of pipe_connect_b: Receive result of pipe connect request on unix socket
 635 */
 636 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx)
 637 {
 638         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 639                                                       struct composite_context);
 640         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 641                                                        struct pipe_connect_state);
 642
 643         c->status = dcerpc_pipe_connect_ncacn_unix_stream_recv(ctx);
 644         if (!composite_is_ok(c)) return;
 645
 646         continue_pipe_connect(c, s);
 647 }
 648
 649
 650 /*
 651   Stage 3 of pipe_connect_b: Receive result of pipe connect request on local rpc
 652 */
 653 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx)
 654 {
 655         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 656                                                       struct composite_context);
 657         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 658                                                        struct pipe_connect_state);
 659
 660         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 661         if (!composite_is_ok(c)) return;
 662
 663         continue_pipe_connect(c, s);
 664 }
 665
 666
 667 /*
 668   Stage 4 of pipe_connect_b: Start an authentication on connected dcerpc pipe
 669   depending on credentials and binding flags passed.
 670 */
 671 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s)
 672 {
 673         struct composite_context *auth_bind_req;
 674
 675         s->pipe->binding = s->binding;
 676         if (!talloc_reference(s->pipe, s->binding)) {
 677                 composite_error(c, NT_STATUS_NO_MEMORY);
 678                 return;
 679         }
 680
 681         auth_bind_req = dcerpc_pipe_auth_send(s->pipe, s->binding, s->table,
 682                                               s->credentials, s->lp_ctx);
 683         composite_continue(c, auth_bind_req, continue_pipe_auth, c);
 684 }
 685
 686
 687 /*
 688   Stage 5 of pipe_connect_b: Receive result of pipe authentication request
 689   and say if all went ok
 690 */
 691 static void continue_pipe_auth(struct composite_context *ctx)
 692 {
 693         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 694                                                       struct composite_context);
 695         struct pipe_connect_state *s = talloc_get_type(c->private_data, struct pipe_connect_state);
 696
 697         c->status = dcerpc_pipe_auth_recv(ctx, s, &s->pipe);
 698         if (!composite_is_ok(c)) return;
 699
 700         composite_done(c);
 701 }
 702
 703
 704 /*
 705   handle timeouts of a dcerpc connect
 706 */
 707 static void dcerpc_connect_timeout_handler(struct event_context *ev, struct timed_event *te,
 708                                            struct timeval t, void *private)
 709 {
 710         struct composite_context *c = talloc_get_type(private, struct composite_context);
 711         composite_error(c, NT_STATUS_IO_TIMEOUT);
 712 }
 713
 714 /*
 715   start a request to open a rpc connection to a rpc pipe, using
 716   specified binding structure to determine the endpoint and options
 717 */
 718 _PUBLIC_ struct composite_context* dcerpc_pipe_connect_b_send(TALLOC_CTX *parent_ctx,
 719                                                      struct dcerpc_binding *binding,
 720                                                      const struct ndr_interface_table *table,
 721                                                      struct cli_credentials *credentials,
 722                                                      struct event_context *ev,
 723                                                      struct loadparm_context *lp_ctx)
 724 {
 725         struct composite_context *c;
 726         struct pipe_connect_state *s;
 727         struct event_context *new_ev = NULL;
 728
 729         /* composite context allocation and setup */
 730         c = composite_create(parent_ctx, ev);
 731         if (c == NULL) {
 732                 talloc_free(new_ev);
 733                 return NULL;
 734         }
 735         talloc_steal(c, new_ev);
 736
 737         s = talloc_zero(c, struct pipe_connect_state);
 738         if (composite_nomem(s, c)) return c;
 739         c->private_data = s;
 740
 741         /* initialise dcerpc pipe structure */
 742         s->pipe = dcerpc_pipe_init(c, ev, lp_iconv_convenience(lp_ctx));
 743         if (composite_nomem(s->pipe, c)) return c;
 744
 745         /* store parameters in state structure */
 746         s->binding      = binding;
 747         s->table        = table;
 748         s->credentials  = credentials;
 749         s->lp_ctx       = lp_ctx;
 750
 751         event_add_timed(c->event_ctx, c,
 752                         timeval_current_ofs(DCERPC_REQUEST_TIMEOUT, 0),
 753                         dcerpc_connect_timeout_handler, c);
 754
 755         switch (s->binding->transport) {
 756         case NCA_UNKNOWN: {
 757                 struct composite_context *binding_req;
 758                 binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
 759                                                           s->pipe->conn->event_ctx,
 760                                                           s->lp_ctx);
 761                 composite_continue(c, binding_req, continue_map_binding, c);
 762                 return c;
 763                 }
 764
 765         case NCACN_NP:
 766         case NCACN_IP_TCP:
 767         case NCALRPC:
 768                 if (!s->binding->endpoint) {
 769                         struct composite_context *binding_req;
 770                         binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
 771                                                                   s->pipe->conn->event_ctx,
 772                                                                   s->lp_ctx);
 773                         composite_continue(c, binding_req, continue_map_binding, c);
 774                         return c;
 775                 }
 776
 777         default:
 778                 break;
 779         }
 780
 781         continue_connect(c, s);
 782         return c;
 783 }
 784
 785
 786 /*
 787   receive result of a request to open a rpc connection to a rpc pipe
 788 */
 789 _PUBLIC_ NTSTATUS dcerpc_pipe_connect_b_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
 790                                     struct dcerpc_pipe **p)
 791 {
 792         NTSTATUS status;
 793         struct pipe_connect_state *s;
 794
 795         status = composite_wait(c);
 796
 797         if (NT_STATUS_IS_OK(status)) {
 798                 s = talloc_get_type(c->private_data, struct pipe_connect_state);
 799                 talloc_steal(mem_ctx, s->pipe);
 800                 *p = s->pipe;
 801         }
 802         talloc_free(c);
 803         return status;
 804 }
 805
 806
 807 /*
 808   open a rpc connection to a rpc pipe, using the specified
 809   binding structure to determine the endpoint and options - sync version
 810 */
 811 _PUBLIC_ NTSTATUS dcerpc_pipe_connect_b(TALLOC_CTX *parent_ctx,
 812                                struct dcerpc_pipe **pp,
 813                                struct dcerpc_binding *binding,
 814                                const struct ndr_interface_table *table,
 815                                struct cli_credentials *credentials,
 816                                struct event_context *ev,
 817                                struct loadparm_context *lp_ctx)
 818 {
 819         struct composite_context *c;
 820
 821         c = dcerpc_pipe_connect_b_send(parent_ctx, binding, table,
 822                                        credentials, ev, lp_ctx);
 823         return dcerpc_pipe_connect_b_recv(c, parent_ctx, pp);
 824 }
 825
 826
 827 struct pipe_conn_state {
 828         struct dcerpc_pipe *pipe;
 829 };
 830
 831
 832 static void continue_pipe_connect_b(struct composite_context *ctx);
 833
 834
 835 /*
 836   Initiate rpc connection to a rpc pipe, using the specified string
 837   binding to determine the endpoint and options.
 838   The string is to be parsed to a binding structure first.
 839 */
 840 _PUBLIC_ struct composite_context* dcerpc_pipe_connect_send(TALLOC_CTX *parent_ctx,
 841                                                    const char *binding,
 842                                                    const struct ndr_interface_table *table,
 843                                                    struct cli_credentials *credentials,
 844                                                    struct event_context *ev, struct loadparm_context *lp_ctx)
 845 {
 846         struct composite_context *c;
 847         struct pipe_conn_state *s;
 848         struct dcerpc_binding *b;
 849         struct composite_context *pipe_conn_req;
 850
 851         /* composite context allocation and setup */
 852         c = composite_create(parent_ctx, ev);
 853         if (c == NULL) {
 854                 return NULL;
 855         }
 856
 857         s = talloc_zero(c, struct pipe_conn_state);
 858         if (composite_nomem(s, c)) return c;
 859         c->private_data = s;
 860
 861         /* parse binding string to the structure */
 862         c->status = dcerpc_parse_binding(c, binding, &b);
 863         if (!NT_STATUS_IS_OK(c->status)) {
 864                 DEBUG(0, ("Failed to parse dcerpc binding '%s'\n", binding));
 865                 composite_error(c, c->status);
 866                 return c;
 867         }
 868
 869         DEBUG(3, ("Using binding %s\n", dcerpc_binding_string(c, b)));
 870
 871         /*
 872            start connecting to a rpc pipe after binding structure
 873            is established
 874          */
 875         pipe_conn_req = dcerpc_pipe_connect_b_send(c, b, table,
 876                                                    credentials, ev, lp_ctx);
 877         composite_continue(c, pipe_conn_req, continue_pipe_connect_b, c);
 878         return c;
 879 }
 880
 881
 882 /*
 883   Stage 2 of pipe_connect: Receive result of actual pipe connect request
 884   and say if we're done ok
 885 */
 886 static void continue_pipe_connect_b(struct composite_context *ctx)
 887 {
 888         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 889                                                       struct composite_context);
 890         struct pipe_conn_state *s = talloc_get_type(c->private_data,
 891                                                     struct pipe_conn_state);
 892
 893         c->status = dcerpc_pipe_connect_b_recv(ctx, c, &s->pipe);
 894         talloc_steal(s, s->pipe);
 895         if (!composite_is_ok(c)) return;
 896
 897         composite_done(c);
 898 }
 899
 900
 901 /*
 902   Receive result of pipe connect (using binding string) request
 903   and return connected pipe structure.
 904 */
 905 NTSTATUS dcerpc_pipe_connect_recv(struct composite_context *c,
 906                                   TALLOC_CTX *mem_ctx,
 907                                   struct dcerpc_pipe **pp)
 908 {
 909         NTSTATUS status;
 910         struct pipe_conn_state *s;
 911
 912         status = composite_wait(c);
 913         if (NT_STATUS_IS_OK(status)) {
 914                 s = talloc_get_type(c->private_data, struct pipe_conn_state);
 915                 *pp = talloc_steal(mem_ctx, s->pipe);
 916         }
 917         talloc_free(c);
 918         return status;
 919 }
 920
 921
 922 /*
 923   Open a rpc connection to a rpc pipe, using the specified string
 924   binding to determine the endpoint and options - sync version
 925 */
 926 _PUBLIC_ NTSTATUS dcerpc_pipe_connect(TALLOC_CTX *parent_ctx,
 927                              struct dcerpc_pipe **pp,
 928                              const char *binding,
 929                              const struct ndr_interface_table *table,
 930                              struct cli_credentials *credentials,
 931                              struct event_context *ev,
 932                              struct loadparm_context *lp_ctx)
 933 {
 934         struct composite_context *c;
 935         c = dcerpc_pipe_connect_send(parent_ctx, binding,
 936                                      table, credentials, ev, lp_ctx);
 937         return dcerpc_pipe_connect_recv(c, parent_ctx, pp);
 938 }
 939