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.socket_options         = lp_socket_options(lp_ctx);
 120         conn->in.service                = "IPC$";
 121         conn->in.service_type           = NULL;
 122         conn->in.workgroup              = lp_workgroup(lp_ctx);
 123         conn->in.gensec_settings = lp_gensec_settings(conn, 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) or if asked to do so by the caller (perhaps a SAMR password change?)
 133          */
 134         s->conn.in.credentials = s->io.creds;
 135         if (s->io.binding->flags & (DCERPC_SCHANNEL|DCERPC_ANON_FALLBACK)) {
 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                                          lp_socket_options(lp_ctx),
 258                                          lp_gensec_settings(mem_ctx, lp_ctx)
 259                                          );
 260         composite_continue(c, conn_req, continue_smb2_connect, c);
 261         return c;
 262 }
 263
 264
 265 /*
 266   Receive result of a rpc connection to a rpc pipe on SMB2
 267 */
 268 static NTSTATUS dcerpc_pipe_connect_ncacn_np_smb2_recv(struct composite_context *c)
 269 {
 270         NTSTATUS status = composite_wait(c);
 271
 272         talloc_free(c);
 273         return status;
 274 }
 275
 276
 277 struct pipe_ip_tcp_state {
 278         struct dcerpc_pipe_connect io;
 279         const char *host;
 280         const char *target_hostname;
 281         uint32_t port;
 282 };
 283
 284
 285 /*
 286   Stage 2 of ncacn_ip_tcp: rpc pipe opened (or not)
 287 */
 288 static void continue_pipe_open_ncacn_ip_tcp(struct composite_context *ctx)
 289 {
 290         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 291                                                       struct composite_context);
 292
 293         /* receive result of named pipe open request on tcp/ip */
 294         c->status = dcerpc_pipe_open_tcp_recv(ctx);
 295         if (!composite_is_ok(c)) return;
 296
 297         composite_done(c);
 298 }
 299
 300
 301 /*
 302   Initiate async open of a rpc connection to a rpc pipe on TCP/IP using
 303   the binding structure to determine the endpoint and options
 304 */
 305 static struct composite_context* dcerpc_pipe_connect_ncacn_ip_tcp_send(TALLOC_CTX *mem_ctx,
 306                                                                        struct dcerpc_pipe_connect *io)
 307 {
 308         struct composite_context *c;
 309         struct pipe_ip_tcp_state *s;
 310         struct composite_context *pipe_req;
 311
 312         /* composite context allocation and setup */
 313         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 314         if (c == NULL) return NULL;
 315
 316         s = talloc_zero(c, struct pipe_ip_tcp_state);
 317         if (composite_nomem(s, c)) return c;
 318         c->private_data = s;
 319
 320         /* store input parameters in state structure */
 321         s->io               = *io;
 322         s->host             = talloc_reference(c, io->binding->host);
 323         s->target_hostname  = talloc_reference(c, io->binding->target_hostname);
 324                              /* port number is a binding endpoint here */
 325         s->port             = atoi(io->binding->endpoint);
 326
 327         /* send pipe open request on tcp/ip */
 328         pipe_req = dcerpc_pipe_open_tcp_send(s->io.pipe->conn, s->host, s->target_hostname,
 329                                              s->port, io->resolve_ctx);
 330         composite_continue(c, pipe_req, continue_pipe_open_ncacn_ip_tcp, c);
 331         return c;
 332 }
 333
 334
 335 /*
 336   Receive result of a rpc connection to a rpc pipe on TCP/IP
 337 */
 338 static NTSTATUS dcerpc_pipe_connect_ncacn_ip_tcp_recv(struct composite_context *c)
 339 {
 340         NTSTATUS status = composite_wait(c);
 341
 342         talloc_free(c);
 343         return status;
 344 }
 345
 346
 347 struct pipe_unix_state {
 348         struct dcerpc_pipe_connect io;
 349         const char *path;
 350 };
 351
 352
 353 /*
 354   Stage 2 of ncacn_unix: rpc pipe opened (or not)
 355 */
 356 static void continue_pipe_open_ncacn_unix_stream(struct composite_context *ctx)
 357 {
 358         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 359                                                       struct composite_context);
 360
 361         /* receive result of pipe open request on unix socket */
 362         c->status = dcerpc_pipe_open_unix_stream_recv(ctx);
 363         if (!composite_is_ok(c)) return;
 364
 365         composite_done(c);
 366 }
 367
 368
 369 /*
 370   Initiate async open of a rpc connection to a rpc pipe on unix socket using
 371   the binding structure to determine the endpoint and options
 372 */
 373 static struct composite_context* dcerpc_pipe_connect_ncacn_unix_stream_send(TALLOC_CTX *mem_ctx,
 374                                                                             struct dcerpc_pipe_connect *io)
 375 {
 376         struct composite_context *c;
 377         struct pipe_unix_state *s;
 378         struct composite_context *pipe_req;
 379
 380         /* composite context allocation and setup */
 381         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 382         if (c == NULL) return NULL;
 383
 384         s = talloc_zero(c, struct pipe_unix_state);
 385         if (composite_nomem(s, c)) return c;
 386         c->private_data = s;
 387
 388         /* prepare pipe open parameters and store them in state structure
 389            also, verify whether biding endpoint is not null */
 390         s->io = *io;
 391
 392         if (!io->binding->endpoint) {
 393                 DEBUG(0, ("Path to unix socket not specified\n"));
 394                 composite_error(c, NT_STATUS_INVALID_PARAMETER);
 395                 return c;
 396         }
 397
 398         s->path  = talloc_strdup(c, io->binding->endpoint);  /* path is a binding endpoint here */
 399         if (composite_nomem(s->path, c)) return c;
 400
 401         /* send pipe open request on unix socket */
 402         pipe_req = dcerpc_pipe_open_unix_stream_send(s->io.pipe->conn, s->path);
 403         composite_continue(c, pipe_req, continue_pipe_open_ncacn_unix_stream, c);
 404         return c;
 405 }
 406
 407
 408 /*
 409   Receive result of a rpc connection to a pipe on unix socket
 410 */
 411 static NTSTATUS dcerpc_pipe_connect_ncacn_unix_stream_recv(struct composite_context *c)
 412 {
 413         NTSTATUS status = composite_wait(c);
 414
 415         talloc_free(c);
 416         return status;
 417 }
 418
 419
 420 struct pipe_ncalrpc_state {
 421         struct dcerpc_pipe_connect io;
 422 };
 423
 424 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c);
 425
 426 /*
 427   Stage 2 of ncalrpc: rpc pipe opened (or not)
 428 */
 429 static void continue_pipe_open_ncalrpc(struct composite_context *ctx)
 430 {
 431         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 432                                                       struct composite_context);
 433
 434         /* receive result of pipe open request on ncalrpc */
 435         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 436         if (!composite_is_ok(c)) return;
 437
 438         composite_done(c);
 439 }
 440
 441
 442 /*
 443    Initiate async open of a rpc connection request on NCALRPC using
 444    the binding structure to determine the endpoint and options
 445 */
 446 static struct composite_context* dcerpc_pipe_connect_ncalrpc_send(TALLOC_CTX *mem_ctx,
 447                                                                   struct dcerpc_pipe_connect *io, struct loadparm_context *lp_ctx)
 448 {
 449         struct composite_context *c;
 450         struct pipe_ncalrpc_state *s;
 451         struct composite_context *pipe_req;
 452
 453         /* composite context allocation and setup */
 454         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 455         if (c == NULL) return NULL;
 456
 457         s = talloc_zero(c, struct pipe_ncalrpc_state);
 458         if (composite_nomem(s, c)) return c;
 459         c->private_data = s;
 460
 461         /* store input parameters in state structure */
 462         s->io  = *io;
 463
 464         /* send pipe open request */
 465         pipe_req = dcerpc_pipe_open_pipe_send(s->io.pipe->conn, lp_ncalrpc_dir(lp_ctx),
 466                                               s->io.binding->endpoint);
 467         composite_continue(c, pipe_req, continue_pipe_open_ncalrpc, c);
 468         return c;
 469 }
 470
 471
 472 /*
 473   Receive result of a rpc connection to a rpc pipe on NCALRPC
 474 */
 475 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c)
 476 {
 477         NTSTATUS status = composite_wait(c);
 478
 479         talloc_free(c);
 480         return status;
 481 }
 482
 483
 484 struct pipe_connect_state {
 485         struct dcerpc_pipe *pipe;
 486         struct dcerpc_binding *binding;
 487         const struct ndr_interface_table *table;
 488         struct cli_credentials *credentials;
 489         struct loadparm_context *lp_ctx;
 490 };
 491
 492
 493 static void continue_map_binding(struct composite_context *ctx);
 494 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s);
 495 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx);
 496 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx);
 497 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx);
 498 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx);
 499 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx);
 500 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s);
 501 static void continue_pipe_auth(struct composite_context *ctx);
 502
 503
 504 /*
 505   Stage 2 of pipe_connect_b: Receive result of endpoint mapping
 506 */
 507 static void continue_map_binding(struct composite_context *ctx)
 508 {
 509         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 510                                                       struct composite_context);
 511         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 512                                                        struct pipe_connect_state);
 513
 514         c->status = dcerpc_epm_map_binding_recv(ctx);
 515         if (!composite_is_ok(c)) return;
 516
 517         DEBUG(2,("Mapped to DCERPC endpoint %s\n", s->binding->endpoint));
 518
 519         continue_connect(c, s);
 520 }
 521
 522
 523 /*
 524   Stage 2 of pipe_connect_b: Continue connection after endpoint is known
 525 */
 526 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s)
 527 {
 528         struct dcerpc_pipe_connect pc;
 529
 530         /* potential exits to another stage by sending an async request */
 531         struct composite_context *ncacn_np_smb2_req;
 532         struct composite_context *ncacn_np_smb_req;
 533         struct composite_context *ncacn_ip_tcp_req;
 534         struct composite_context *ncacn_unix_req;
 535         struct composite_context *ncalrpc_req;
 536
 537         /* dcerpc pipe connect input parameters */
 538         pc.pipe         = s->pipe;
 539         pc.binding      = s->binding;
 540         pc.interface    = s->table;
 541         pc.creds        = s->credentials;
 542         pc.resolve_ctx  = lp_resolve_context(s->lp_ctx);
 543
 544         /* connect dcerpc pipe depending on required transport */
 545         switch (s->binding->transport) {
 546         case NCACN_NP:
 547                 if (pc.binding->flags & DCERPC_SMB2) {
 548                         /* new varient of SMB a.k.a. SMB2 */
 549                         ncacn_np_smb2_req = dcerpc_pipe_connect_ncacn_np_smb2_send(c, &pc, s->lp_ctx);
 550                         composite_continue(c, ncacn_np_smb2_req, continue_pipe_connect_ncacn_np_smb2, c);
 551                         return;
 552
 553                 } else {
 554                         /* good old ordinary SMB */
 555                         ncacn_np_smb_req = dcerpc_pipe_connect_ncacn_np_smb_send(c, &pc, s->lp_ctx);
 556                         composite_continue(c, ncacn_np_smb_req, continue_pipe_connect_ncacn_np_smb, c);
 557                         return;
 558                 }
 559                 break;
 560
 561         case NCACN_IP_TCP:
 562                 ncacn_ip_tcp_req = dcerpc_pipe_connect_ncacn_ip_tcp_send(c, &pc);
 563                 composite_continue(c, ncacn_ip_tcp_req, continue_pipe_connect_ncacn_ip_tcp, c);
 564                 return;
 565
 566         case NCACN_UNIX_STREAM:
 567                 ncacn_unix_req = dcerpc_pipe_connect_ncacn_unix_stream_send(c, &pc);
 568                 composite_continue(c, ncacn_unix_req, continue_pipe_connect_ncacn_unix, c);
 569                 return;
 570
 571         case NCALRPC:
 572                 ncalrpc_req = dcerpc_pipe_connect_ncalrpc_send(c, &pc, s->lp_ctx);
 573                 composite_continue(c, ncalrpc_req, continue_pipe_connect_ncalrpc, c);
 574                 return;
 575
 576         default:
 577                 /* looks like a transport we don't support now */
 578                 composite_error(c, NT_STATUS_NOT_SUPPORTED);
 579         }
 580 }
 581
 582
 583 /*
 584   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 585   named pipe on smb2
 586 */
 587 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx)
 588 {
 589         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 590                                                       struct composite_context);
 591         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 592                                                        struct pipe_connect_state);
 593
 594         c->status = dcerpc_pipe_connect_ncacn_np_smb2_recv(ctx);
 595         if (!composite_is_ok(c)) return;
 596
 597         continue_pipe_connect(c, s);
 598 }
 599
 600
 601 /*
 602   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 603   named pipe on smb
 604 */
 605 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx)
 606 {
 607         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 608                                                       struct composite_context);
 609         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 610                                                        struct pipe_connect_state);
 611
 612         c->status = dcerpc_pipe_connect_ncacn_np_smb_recv(ctx);
 613         if (!composite_is_ok(c)) return;
 614
 615         continue_pipe_connect(c, s);
 616 }
 617
 618
 619 /*
 620   Stage 3 of pipe_connect_b: Receive result of pipe connect request on tcp/ip
 621 */
 622 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx)
 623 {
 624         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 625                                                       struct composite_context);
 626         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 627                                                        struct pipe_connect_state);
 628
 629         c->status = dcerpc_pipe_connect_ncacn_ip_tcp_recv(ctx);
 630         if (!composite_is_ok(c)) return;
 631
 632         continue_pipe_connect(c, s);
 633 }
 634
 635
 636 /*
 637   Stage 3 of pipe_connect_b: Receive result of pipe connect request on unix socket
 638 */
 639 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx)
 640 {
 641         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 642                                                       struct composite_context);
 643         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 644                                                        struct pipe_connect_state);
 645
 646         c->status = dcerpc_pipe_connect_ncacn_unix_stream_recv(ctx);
 647         if (!composite_is_ok(c)) return;
 648
 649         continue_pipe_connect(c, s);
 650 }
 651
 652
 653 /*
 654   Stage 3 of pipe_connect_b: Receive result of pipe connect request on local rpc
 655 */
 656 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx)
 657 {
 658         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 659                                                       struct composite_context);
 660         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 661                                                        struct pipe_connect_state);
 662
 663         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 664         if (!composite_is_ok(c)) return;
 665
 666         continue_pipe_connect(c, s);
 667 }
 668
 669
 670 /*
 671   Stage 4 of pipe_connect_b: Start an authentication on connected dcerpc pipe
 672   depending on credentials and binding flags passed.
 673 */
 674 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s)
 675 {
 676         struct composite_context *auth_bind_req;
 677
 678         s->pipe->binding = s->binding;
 679         if (!talloc_reference(s->pipe, s->binding)) {
 680                 composite_error(c, NT_STATUS_NO_MEMORY);
 681                 return;
 682         }
 683
 684         auth_bind_req = dcerpc_pipe_auth_send(s->pipe, s->binding, s->table,
 685                                               s->credentials, s->lp_ctx);
 686         composite_continue(c, auth_bind_req, continue_pipe_auth, c);
 687 }
 688
 689
 690 /*
 691   Stage 5 of pipe_connect_b: Receive result of pipe authentication request
 692   and say if all went ok
 693 */
 694 static void continue_pipe_auth(struct composite_context *ctx)
 695 {
 696         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 697                                                       struct composite_context);
 698         struct pipe_connect_state *s = talloc_get_type(c->private_data, struct pipe_connect_state);
 699
 700         c->status = dcerpc_pipe_auth_recv(ctx, s, &s->pipe);
 701         if (!composite_is_ok(c)) return;
 702
 703         composite_done(c);
 704 }
 705
 706
 707 /*
 708   handle timeouts of a dcerpc connect
 709 */
 710 static void dcerpc_connect_timeout_handler(struct tevent_context *ev, struct tevent_timer *te,
 711                                            struct timeval t, void *private_data)
 712 {
 713         struct composite_context *c = talloc_get_type(private_data, struct composite_context);
 714         composite_error(c, NT_STATUS_IO_TIMEOUT);
 715 }
 716
 717 /*
 718   start a request to open a rpc connection to a rpc pipe, using
 719   specified binding structure to determine the endpoint and options
 720 */
 721 _PUBLIC_ struct composite_context* dcerpc_pipe_connect_b_send(TALLOC_CTX *parent_ctx,
 722                                                      struct dcerpc_binding *binding,
 723                                                      const struct ndr_interface_table *table,
 724                                                      struct cli_credentials *credentials,
 725                                                      struct tevent_context *ev,
 726                                                      struct loadparm_context *lp_ctx)
 727 {
 728         struct composite_context *c;
 729         struct pipe_connect_state *s;
 730         struct tevent_context *new_ev = NULL;
 731
 732         /* composite context allocation and setup */
 733         c = composite_create(parent_ctx, ev);
 734         if (c == NULL) {
 735                 talloc_free(new_ev);
 736                 return NULL;
 737         }
 738         talloc_steal(c, new_ev);
 739
 740         s = talloc_zero(c, struct pipe_connect_state);
 741         if (composite_nomem(s, c)) return c;
 742         c->private_data = s;
 743
 744         /* initialise dcerpc pipe structure */
 745         s->pipe = dcerpc_pipe_init(c, ev);
 746         if (composite_nomem(s->pipe, c)) return c;
 747
 748         if (DEBUGLEVEL >= 10)
 749                 s->pipe->conn->packet_log_dir = lp_lockdir(lp_ctx);
 750
 751         /* store parameters in state structure */
 752         s->binding      = binding;
 753         s->table        = table;
 754         s->credentials  = credentials;
 755         s->lp_ctx       = lp_ctx;
 756
 757         event_add_timed(c->event_ctx, c,
 758                         timeval_current_ofs(DCERPC_REQUEST_TIMEOUT, 0),
 759                         dcerpc_connect_timeout_handler, c);
 760
 761         switch (s->binding->transport) {
 762         case NCA_UNKNOWN: {
 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         case NCACN_NP:
 772         case NCACN_IP_TCP:
 773         case NCALRPC:
 774                 if (!s->binding->endpoint) {
 775                         struct composite_context *binding_req;
 776                         binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
 777                                                                   s->pipe->conn->event_ctx,
 778                                                                   s->lp_ctx);
 779                         composite_continue(c, binding_req, continue_map_binding, c);
 780                         return c;
 781                 }
 782
 783         default:
 784                 break;
 785         }
 786
 787         continue_connect(c, s);
 788         return c;
 789 }
 790
 791
 792 /*
 793   receive result of a request to open a rpc connection to a rpc pipe
 794 */
 795 _PUBLIC_ NTSTATUS dcerpc_pipe_connect_b_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
 796                                     struct dcerpc_pipe **p)
 797 {
 798         NTSTATUS status;
 799         struct pipe_connect_state *s;
 800
 801         status = composite_wait(c);
 802
 803         if (NT_STATUS_IS_OK(status)) {
 804                 s = talloc_get_type(c->private_data, struct pipe_connect_state);
 805                 talloc_steal(mem_ctx, s->pipe);
 806                 *p = s->pipe;
 807         }
 808         talloc_free(c);
 809         return status;
 810 }
 811
 812
 813 /*
 814   open a rpc connection to a rpc pipe, using the specified
 815   binding structure to determine the endpoint and options - sync version
 816 */
 817 _PUBLIC_ NTSTATUS dcerpc_pipe_connect_b(TALLOC_CTX *parent_ctx,
 818                                struct dcerpc_pipe **pp,
 819                                struct dcerpc_binding *binding,
 820                                const struct ndr_interface_table *table,
 821                                struct cli_credentials *credentials,
 822                                struct tevent_context *ev,
 823                                struct loadparm_context *lp_ctx)
 824 {
 825         struct composite_context *c;
 826
 827         c = dcerpc_pipe_connect_b_send(parent_ctx, binding, table,
 828                                        credentials, ev, lp_ctx);
 829         return dcerpc_pipe_connect_b_recv(c, parent_ctx, pp);
 830 }
 831
 832
 833 struct pipe_conn_state {
 834         struct dcerpc_pipe *pipe;
 835 };
 836
 837
 838 static void continue_pipe_connect_b(struct composite_context *ctx);
 839
 840
 841 /*
 842   Initiate rpc connection to a rpc pipe, using the specified string
 843   binding to determine the endpoint and options.
 844   The string is to be parsed to a binding structure first.
 845 */
 846 _PUBLIC_ struct composite_context* dcerpc_pipe_connect_send(TALLOC_CTX *parent_ctx,
 847                                                    const char *binding,
 848                                                    const struct ndr_interface_table *table,
 849                                                    struct cli_credentials *credentials,
 850                                                    struct tevent_context *ev, struct loadparm_context *lp_ctx)
 851 {
 852         struct composite_context *c;
 853         struct pipe_conn_state *s;
 854         struct dcerpc_binding *b;
 855         struct composite_context *pipe_conn_req;
 856
 857         /* composite context allocation and setup */
 858         c = composite_create(parent_ctx, ev);
 859         if (c == NULL) {
 860                 return NULL;
 861         }
 862
 863         s = talloc_zero(c, struct pipe_conn_state);
 864         if (composite_nomem(s, c)) return c;
 865         c->private_data = s;
 866
 867         /* parse binding string to the structure */
 868         c->status = dcerpc_parse_binding(c, binding, &b);
 869         if (!NT_STATUS_IS_OK(c->status)) {
 870                 DEBUG(0, ("Failed to parse dcerpc binding '%s'\n", binding));
 871                 composite_error(c, c->status);
 872                 return c;
 873         }
 874
 875         DEBUG(3, ("Using binding %s\n", dcerpc_binding_string(c, b)));
 876
 877         /*
 878            start connecting to a rpc pipe after binding structure
 879            is established
 880          */
 881         pipe_conn_req = dcerpc_pipe_connect_b_send(c, b, table,
 882                                                    credentials, ev, lp_ctx);
 883         composite_continue(c, pipe_conn_req, continue_pipe_connect_b, c);
 884         return c;
 885 }
 886
 887
 888 /*
 889   Stage 2 of pipe_connect: Receive result of actual pipe connect request
 890   and say if we're done ok
 891 */
 892 static void continue_pipe_connect_b(struct composite_context *ctx)
 893 {
 894         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 895                                                       struct composite_context);
 896         struct pipe_conn_state *s = talloc_get_type(c->private_data,
 897                                                     struct pipe_conn_state);
 898
 899         c->status = dcerpc_pipe_connect_b_recv(ctx, c, &s->pipe);
 900         talloc_steal(s, s->pipe);
 901         if (!composite_is_ok(c)) return;
 902
 903         composite_done(c);
 904 }
 905
 906
 907 /*
 908   Receive result of pipe connect (using binding string) request
 909   and return connected pipe structure.
 910 */
 911 NTSTATUS dcerpc_pipe_connect_recv(struct composite_context *c,
 912                                   TALLOC_CTX *mem_ctx,
 913                                   struct dcerpc_pipe **pp)
 914 {
 915         NTSTATUS status;
 916         struct pipe_conn_state *s;
 917
 918         status = composite_wait(c);
 919         if (NT_STATUS_IS_OK(status)) {
 920                 s = talloc_get_type(c->private_data, struct pipe_conn_state);
 921                 *pp = talloc_steal(mem_ctx, s->pipe);
 922         }
 923         talloc_free(c);
 924         return status;
 925 }
 926
 927
 928 /*
 929   Open a rpc connection to a rpc pipe, using the specified string
 930   binding to determine the endpoint and options - sync version
 931 */
 932 _PUBLIC_ NTSTATUS dcerpc_pipe_connect(TALLOC_CTX *parent_ctx,
 933                              struct dcerpc_pipe **pp,
 934                              const char *binding,
 935                              const struct ndr_interface_table *table,
 936                              struct cli_credentials *credentials,
 937                              struct tevent_context *ev,
 938                              struct loadparm_context *lp_ctx)
 939 {
 940         struct composite_context *c;
 941         c = dcerpc_pipe_connect_send(parent_ctx, binding,
 942                                      table, credentials, ev, lp_ctx);
 943         return dcerpc_pipe_connect_recv(c, parent_ctx, pp);
 944 }
 945