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                  = lpcfg_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         = lpcfg_socket_options(lp_ctx);
 120         conn->in.service                = "IPC$";
 121         conn->in.service_type           = NULL;
 122         conn->in.workgroup              = lpcfg_workgroup(lp_ctx);
 123         conn->in.gensec_settings = lpcfg_gensec_settings(conn, lp_ctx);
 124
 125         lpcfg_smbcli_options(lp_ctx, &conn->in.options);
 126         lpcfg_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 tevent_req *subreq)
 190 {
 191         struct composite_context *open_req;
 192         struct composite_context *c =
 193                 tevent_req_callback_data(subreq,
 194                 struct composite_context);
 195         struct pipe_np_smb2_state *s = talloc_get_type(c->private_data,
 196                                                        struct pipe_np_smb2_state);
 197
 198         /* receive result of smb2 connect request */
 199         c->status = smb2_connect_recv(subreq, c, &s->tree);
 200         TALLOC_FREE(subreq);
 201         if (!composite_is_ok(c)) return;
 202
 203         /* prepare named pipe open parameters */
 204         s->io.pipe_name = s->io.binding->endpoint;
 205
 206         /* send named pipe open request */
 207         open_req = dcerpc_pipe_open_smb2_send(s->io.pipe, s->tree, s->io.pipe_name);
 208         if (composite_nomem(open_req, c)) return;
 209
 210         composite_continue(c, open_req, continue_pipe_open_smb2, c);
 211 }
 212
 213
 214 /*
 215    Initiate async open of a rpc connection request on SMB2 using
 216    the binding structure to determine the endpoint and options
 217 */
 218 static struct composite_context *dcerpc_pipe_connect_ncacn_np_smb2_send(
 219                                         TALLOC_CTX *mem_ctx,
 220                                         struct dcerpc_pipe_connect *io,
 221                                         struct loadparm_context *lp_ctx)
 222 {
 223         struct composite_context *c;
 224         struct pipe_np_smb2_state *s;
 225         struct tevent_req *subreq;
 226         struct smbcli_options options;
 227
 228         /* composite context allocation and setup */
 229         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 230         if (c == NULL) return NULL;
 231
 232         s = talloc_zero(c, struct pipe_np_smb2_state);
 233         if (composite_nomem(s, c)) return c;
 234         c->private_data = s;
 235
 236         s->io = *io;
 237
 238         /*
 239          * provide proper credentials - user supplied or anonymous in case this is
 240          * schannel connection
 241          */
 242         if (s->io.binding->flags & DCERPC_SCHANNEL) {
 243                 s->io.creds = cli_credentials_init(mem_ctx);
 244                 if (composite_nomem(s->io.creds, c)) return c;
 245
 246                 cli_credentials_guess(s->io.creds, lp_ctx);
 247         }
 248
 249         lpcfg_smbcli_options(lp_ctx, &options);
 250
 251         /* send smb2 connect request */
 252         subreq = smb2_connect_send(s, c->event_ctx,
 253                         s->io.binding->host,
 254                         lpcfg_parm_string_list(mem_ctx, lp_ctx, NULL, "smb2", "ports", NULL),
 255                         "IPC$",
 256                         s->io.resolve_ctx,
 257                         s->io.creds,
 258                         0, /* previous_session_id */
 259                         &options,
 260                         lpcfg_socket_options(lp_ctx),
 261                         lpcfg_gensec_settings(mem_ctx, lp_ctx));
 262         if (composite_nomem(subreq, c)) return c;
 263         tevent_req_set_callback(subreq, continue_smb2_connect, c);
 264         return c;
 265 }
 266
 267
 268 /*
 269   Receive result of a rpc connection to a rpc pipe on SMB2
 270 */
 271 static NTSTATUS dcerpc_pipe_connect_ncacn_np_smb2_recv(struct composite_context *c)
 272 {
 273         NTSTATUS status = composite_wait(c);
 274
 275         talloc_free(c);
 276         return status;
 277 }
 278
 279
 280 struct pipe_ip_tcp_state {
 281         struct dcerpc_pipe_connect io;
 282         const char *localaddr;
 283         const char *host;
 284         const char *target_hostname;
 285         uint32_t port;
 286 };
 287
 288
 289 /*
 290   Stage 2 of ncacn_ip_tcp: rpc pipe opened (or not)
 291 */
 292 static void continue_pipe_open_ncacn_ip_tcp(struct composite_context *ctx)
 293 {
 294         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 295                                                       struct composite_context);
 296
 297         /* receive result of named pipe open request on tcp/ip */
 298         c->status = dcerpc_pipe_open_tcp_recv(ctx);
 299         if (!composite_is_ok(c)) return;
 300
 301         composite_done(c);
 302 }
 303
 304
 305 /*
 306   Initiate async open of a rpc connection to a rpc pipe on TCP/IP using
 307   the binding structure to determine the endpoint and options
 308 */
 309 static struct composite_context* dcerpc_pipe_connect_ncacn_ip_tcp_send(TALLOC_CTX *mem_ctx,
 310                                                                        struct dcerpc_pipe_connect *io)
 311 {
 312         struct composite_context *c;
 313         struct pipe_ip_tcp_state *s;
 314         struct composite_context *pipe_req;
 315
 316         /* composite context allocation and setup */
 317         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 318         if (c == NULL) return NULL;
 319
 320         s = talloc_zero(c, struct pipe_ip_tcp_state);
 321         if (composite_nomem(s, c)) return c;
 322         c->private_data = s;
 323
 324         /* store input parameters in state structure */
 325         s->io               = *io;
 326         s->localaddr        = talloc_reference(c, io->binding->localaddress);
 327         s->host             = talloc_reference(c, io->binding->host);
 328         s->target_hostname  = talloc_reference(c, io->binding->target_hostname);
 329                              /* port number is a binding endpoint here */
 330         s->port             = atoi(io->binding->endpoint);
 331
 332         /* send pipe open request on tcp/ip */
 333         pipe_req = dcerpc_pipe_open_tcp_send(s->io.pipe->conn, s->localaddr, s->host, s->target_hostname,
 334                                              s->port, io->resolve_ctx);
 335         composite_continue(c, pipe_req, continue_pipe_open_ncacn_ip_tcp, c);
 336         return c;
 337 }
 338
 339
 340 /*
 341   Receive result of a rpc connection to a rpc pipe on TCP/IP
 342 */
 343 static NTSTATUS dcerpc_pipe_connect_ncacn_ip_tcp_recv(struct composite_context *c)
 344 {
 345         NTSTATUS status = composite_wait(c);
 346
 347         talloc_free(c);
 348         return status;
 349 }
 350
 351
 352 struct pipe_unix_state {
 353         struct dcerpc_pipe_connect io;
 354         const char *path;
 355 };
 356
 357
 358 /*
 359   Stage 2 of ncacn_unix: rpc pipe opened (or not)
 360 */
 361 static void continue_pipe_open_ncacn_unix_stream(struct composite_context *ctx)
 362 {
 363         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 364                                                       struct composite_context);
 365
 366         /* receive result of pipe open request on unix socket */
 367         c->status = dcerpc_pipe_open_unix_stream_recv(ctx);
 368         if (!composite_is_ok(c)) return;
 369
 370         composite_done(c);
 371 }
 372
 373
 374 /*
 375   Initiate async open of a rpc connection to a rpc pipe on unix socket using
 376   the binding structure to determine the endpoint and options
 377 */
 378 static struct composite_context* dcerpc_pipe_connect_ncacn_unix_stream_send(TALLOC_CTX *mem_ctx,
 379                                                                             struct dcerpc_pipe_connect *io)
 380 {
 381         struct composite_context *c;
 382         struct pipe_unix_state *s;
 383         struct composite_context *pipe_req;
 384
 385         /* composite context allocation and setup */
 386         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 387         if (c == NULL) return NULL;
 388
 389         s = talloc_zero(c, struct pipe_unix_state);
 390         if (composite_nomem(s, c)) return c;
 391         c->private_data = s;
 392
 393         /* prepare pipe open parameters and store them in state structure
 394            also, verify whether biding endpoint is not null */
 395         s->io = *io;
 396
 397         if (!io->binding->endpoint) {
 398                 DEBUG(0, ("Path to unix socket not specified\n"));
 399                 composite_error(c, NT_STATUS_INVALID_PARAMETER);
 400                 return c;
 401         }
 402
 403         s->path  = talloc_strdup(c, io->binding->endpoint);  /* path is a binding endpoint here */
 404         if (composite_nomem(s->path, c)) return c;
 405
 406         /* send pipe open request on unix socket */
 407         pipe_req = dcerpc_pipe_open_unix_stream_send(s->io.pipe->conn, s->path);
 408         composite_continue(c, pipe_req, continue_pipe_open_ncacn_unix_stream, c);
 409         return c;
 410 }
 411
 412
 413 /*
 414   Receive result of a rpc connection to a pipe on unix socket
 415 */
 416 static NTSTATUS dcerpc_pipe_connect_ncacn_unix_stream_recv(struct composite_context *c)
 417 {
 418         NTSTATUS status = composite_wait(c);
 419
 420         talloc_free(c);
 421         return status;
 422 }
 423
 424
 425 struct pipe_ncalrpc_state {
 426         struct dcerpc_pipe_connect io;
 427 };
 428
 429 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c);
 430
 431 /*
 432   Stage 2 of ncalrpc: rpc pipe opened (or not)
 433 */
 434 static void continue_pipe_open_ncalrpc(struct composite_context *ctx)
 435 {
 436         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 437                                                       struct composite_context);
 438
 439         /* receive result of pipe open request on ncalrpc */
 440         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 441         if (!composite_is_ok(c)) return;
 442
 443         composite_done(c);
 444 }
 445
 446
 447 /*
 448    Initiate async open of a rpc connection request on NCALRPC using
 449    the binding structure to determine the endpoint and options
 450 */
 451 static struct composite_context* dcerpc_pipe_connect_ncalrpc_send(TALLOC_CTX *mem_ctx,
 452                                                                   struct dcerpc_pipe_connect *io, struct loadparm_context *lp_ctx)
 453 {
 454         struct composite_context *c;
 455         struct pipe_ncalrpc_state *s;
 456         struct composite_context *pipe_req;
 457
 458         /* composite context allocation and setup */
 459         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 460         if (c == NULL) return NULL;
 461
 462         s = talloc_zero(c, struct pipe_ncalrpc_state);
 463         if (composite_nomem(s, c)) return c;
 464         c->private_data = s;
 465
 466         /* store input parameters in state structure */
 467         s->io  = *io;
 468
 469         /* send pipe open request */
 470         pipe_req = dcerpc_pipe_open_pipe_send(s->io.pipe->conn, lpcfg_ncalrpc_dir(lp_ctx),
 471                                               s->io.binding->endpoint);
 472         composite_continue(c, pipe_req, continue_pipe_open_ncalrpc, c);
 473         return c;
 474 }
 475
 476
 477 /*
 478   Receive result of a rpc connection to a rpc pipe on NCALRPC
 479 */
 480 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c)
 481 {
 482         NTSTATUS status = composite_wait(c);
 483
 484         talloc_free(c);
 485         return status;
 486 }
 487
 488
 489 struct pipe_connect_state {
 490         struct dcerpc_pipe *pipe;
 491         struct dcerpc_binding *binding;
 492         const struct ndr_interface_table *table;
 493         struct cli_credentials *credentials;
 494         struct loadparm_context *lp_ctx;
 495 };
 496
 497
 498 static void continue_map_binding(struct composite_context *ctx);
 499 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s);
 500 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx);
 501 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx);
 502 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx);
 503 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx);
 504 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx);
 505 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s);
 506 static void continue_pipe_auth(struct composite_context *ctx);
 507
 508
 509 /*
 510   Stage 2 of pipe_connect_b: Receive result of endpoint mapping
 511 */
 512 static void continue_map_binding(struct composite_context *ctx)
 513 {
 514         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 515                                                       struct composite_context);
 516         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 517                                                        struct pipe_connect_state);
 518
 519         c->status = dcerpc_epm_map_binding_recv(ctx);
 520         if (!composite_is_ok(c)) return;
 521
 522         DEBUG(4,("Mapped to DCERPC endpoint %s\n", s->binding->endpoint));
 523
 524         continue_connect(c, s);
 525 }
 526
 527
 528 /*
 529   Stage 2 of pipe_connect_b: Continue connection after endpoint is known
 530 */
 531 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s)
 532 {
 533         struct dcerpc_pipe_connect pc;
 534
 535         /* potential exits to another stage by sending an async request */
 536         struct composite_context *ncacn_np_smb2_req;
 537         struct composite_context *ncacn_np_smb_req;
 538         struct composite_context *ncacn_ip_tcp_req;
 539         struct composite_context *ncacn_unix_req;
 540         struct composite_context *ncalrpc_req;
 541
 542         /* dcerpc pipe connect input parameters */
 543         pc.pipe         = s->pipe;
 544         pc.binding      = s->binding;
 545         pc.pipe_name    = NULL;
 546         pc.interface    = s->table;
 547         pc.creds        = s->credentials;
 548         pc.resolve_ctx  = lpcfg_resolve_context(s->lp_ctx);
 549
 550         /* connect dcerpc pipe depending on required transport */
 551         switch (s->binding->transport) {
 552         case NCACN_NP:
 553                 if (pc.binding->flags & DCERPC_SMB2) {
 554                         /* new varient of SMB a.k.a. SMB2 */
 555                         ncacn_np_smb2_req = dcerpc_pipe_connect_ncacn_np_smb2_send(c, &pc, s->lp_ctx);
 556                         composite_continue(c, ncacn_np_smb2_req, continue_pipe_connect_ncacn_np_smb2, c);
 557                         return;
 558
 559                 } else {
 560                         /* good old ordinary SMB */
 561                         ncacn_np_smb_req = dcerpc_pipe_connect_ncacn_np_smb_send(c, &pc, s->lp_ctx);
 562                         composite_continue(c, ncacn_np_smb_req, continue_pipe_connect_ncacn_np_smb, c);
 563                         return;
 564                 }
 565                 break;
 566
 567         case NCACN_IP_TCP:
 568                 ncacn_ip_tcp_req = dcerpc_pipe_connect_ncacn_ip_tcp_send(c, &pc);
 569                 composite_continue(c, ncacn_ip_tcp_req, continue_pipe_connect_ncacn_ip_tcp, c);
 570                 return;
 571
 572         case NCACN_UNIX_STREAM:
 573                 ncacn_unix_req = dcerpc_pipe_connect_ncacn_unix_stream_send(c, &pc);
 574                 composite_continue(c, ncacn_unix_req, continue_pipe_connect_ncacn_unix, c);
 575                 return;
 576
 577         case NCALRPC:
 578                 ncalrpc_req = dcerpc_pipe_connect_ncalrpc_send(c, &pc, s->lp_ctx);
 579                 composite_continue(c, ncalrpc_req, continue_pipe_connect_ncalrpc, c);
 580                 return;
 581
 582         default:
 583                 /* looks like a transport we don't support now */
 584                 composite_error(c, NT_STATUS_NOT_SUPPORTED);
 585         }
 586 }
 587
 588
 589 /*
 590   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 591   named pipe on smb2
 592 */
 593 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx)
 594 {
 595         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 596                                                       struct composite_context);
 597         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 598                                                        struct pipe_connect_state);
 599
 600         c->status = dcerpc_pipe_connect_ncacn_np_smb2_recv(ctx);
 601         if (!composite_is_ok(c)) return;
 602
 603         continue_pipe_connect(c, s);
 604 }
 605
 606
 607 /*
 608   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 609   named pipe on smb
 610 */
 611 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx)
 612 {
 613         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 614                                                       struct composite_context);
 615         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 616                                                        struct pipe_connect_state);
 617
 618         c->status = dcerpc_pipe_connect_ncacn_np_smb_recv(ctx);
 619         if (!composite_is_ok(c)) return;
 620
 621         continue_pipe_connect(c, s);
 622 }
 623
 624
 625 /*
 626   Stage 3 of pipe_connect_b: Receive result of pipe connect request on tcp/ip
 627 */
 628 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx)
 629 {
 630         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 631                                                       struct composite_context);
 632         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 633                                                        struct pipe_connect_state);
 634
 635         c->status = dcerpc_pipe_connect_ncacn_ip_tcp_recv(ctx);
 636         if (!composite_is_ok(c)) return;
 637
 638         continue_pipe_connect(c, s);
 639 }
 640
 641
 642 /*
 643   Stage 3 of pipe_connect_b: Receive result of pipe connect request on unix socket
 644 */
 645 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx)
 646 {
 647         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 648                                                       struct composite_context);
 649         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 650                                                        struct pipe_connect_state);
 651
 652         c->status = dcerpc_pipe_connect_ncacn_unix_stream_recv(ctx);
 653         if (!composite_is_ok(c)) return;
 654
 655         continue_pipe_connect(c, s);
 656 }
 657
 658
 659 /*
 660   Stage 3 of pipe_connect_b: Receive result of pipe connect request on local rpc
 661 */
 662 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx)
 663 {
 664         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 665                                                       struct composite_context);
 666         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 667                                                        struct pipe_connect_state);
 668
 669         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 670         if (!composite_is_ok(c)) return;
 671
 672         continue_pipe_connect(c, s);
 673 }
 674
 675
 676 /*
 677   Stage 4 of pipe_connect_b: Start an authentication on connected dcerpc pipe
 678   depending on credentials and binding flags passed.
 679 */
 680 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s)
 681 {
 682         struct composite_context *auth_bind_req;
 683
 684         s->pipe->binding = s->binding;
 685         if (!talloc_reference(s->pipe, s->binding)) {
 686                 composite_error(c, NT_STATUS_NO_MEMORY);
 687                 return;
 688         }
 689
 690         auth_bind_req = dcerpc_pipe_auth_send(s->pipe, s->binding, s->table,
 691                                               s->credentials, s->lp_ctx);
 692         composite_continue(c, auth_bind_req, continue_pipe_auth, c);
 693 }
 694
 695
 696 /*
 697   Stage 5 of pipe_connect_b: Receive result of pipe authentication request
 698   and say if all went ok
 699 */
 700 static void continue_pipe_auth(struct composite_context *ctx)
 701 {
 702         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 703                                                       struct composite_context);
 704         struct pipe_connect_state *s = talloc_get_type(c->private_data, struct pipe_connect_state);
 705
 706         c->status = dcerpc_pipe_auth_recv(ctx, s, &s->pipe);
 707         if (!composite_is_ok(c)) return;
 708
 709         composite_done(c);
 710 }
 711
 712
 713 /*
 714   handle timeouts of a dcerpc connect
 715 */
 716 static void dcerpc_connect_timeout_handler(struct tevent_context *ev, struct tevent_timer *te,
 717                                            struct timeval t, void *private_data)
 718 {
 719         struct composite_context *c = talloc_get_type_abort(private_data,
 720                                                       struct composite_context);
 721         struct pipe_connect_state *s = talloc_get_type_abort(c->private_data, struct pipe_connect_state);
 722         if (!s->pipe->inhibit_timeout_processing) {
 723                 composite_error(c, NT_STATUS_IO_TIMEOUT);
 724         } else {
 725                 s->pipe->timed_out = true;
 726         }
 727 }
 728
 729 /*
 730   start a request to open a rpc connection to a rpc pipe, using
 731   specified binding structure to determine the endpoint and options
 732 */
 733 _PUBLIC_ struct composite_context* dcerpc_pipe_connect_b_send(TALLOC_CTX *parent_ctx,
 734                                                      struct dcerpc_binding *binding,
 735                                                      const struct ndr_interface_table *table,
 736                                                      struct cli_credentials *credentials,
 737                                                      struct tevent_context *ev,
 738                                                      struct loadparm_context *lp_ctx)
 739 {
 740         struct composite_context *c;
 741         struct pipe_connect_state *s;
 742
 743         /* composite context allocation and setup */
 744         c = composite_create(parent_ctx, ev);
 745         if (c == NULL) {
 746                 return NULL;
 747         }
 748
 749         s = talloc_zero(c, struct pipe_connect_state);
 750         if (composite_nomem(s, c)) return c;
 751         c->private_data = s;
 752
 753         /* initialise dcerpc pipe structure */
 754         s->pipe = dcerpc_pipe_init(c, ev);
 755         if (composite_nomem(s->pipe, c)) return c;
 756
 757         if (DEBUGLEVEL >= 10)
 758                 s->pipe->conn->packet_log_dir = lpcfg_lockdir(lp_ctx);
 759
 760         /* store parameters in state structure */
 761         s->binding      = binding;
 762         s->table        = table;
 763         s->credentials  = credentials;
 764         s->lp_ctx       = lp_ctx;
 765
 766         s->pipe->timed_out = false;
 767         s->pipe->inhibit_timeout_processing = false;
 768
 769         tevent_add_timer(c->event_ctx, c,
 770                          timeval_current_ofs(DCERPC_REQUEST_TIMEOUT, 0),
 771                          dcerpc_connect_timeout_handler, c);
 772
 773         switch (s->binding->transport) {
 774         case NCA_UNKNOWN: {
 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         case NCACN_NP:
 784         case NCACN_IP_TCP:
 785         case NCALRPC:
 786                 if (!s->binding->endpoint) {
 787                         struct composite_context *binding_req;
 788                         binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
 789                                                                   s->pipe->conn->event_ctx,
 790                                                                   s->lp_ctx);
 791                         composite_continue(c, binding_req, continue_map_binding, c);
 792                         return c;
 793                 }
 794
 795         default:
 796                 break;
 797         }
 798
 799         continue_connect(c, s);
 800         return c;
 801 }
 802
 803
 804 /*
 805   receive result of a request to open a rpc connection to a rpc pipe
 806 */
 807 _PUBLIC_ NTSTATUS dcerpc_pipe_connect_b_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
 808                                     struct dcerpc_pipe **p)
 809 {
 810         NTSTATUS status;
 811         struct pipe_connect_state *s;
 812
 813         status = composite_wait(c);
 814
 815         if (NT_STATUS_IS_OK(status)) {
 816                 s = talloc_get_type(c->private_data, struct pipe_connect_state);
 817                 talloc_steal(mem_ctx, s->pipe);
 818                 *p = s->pipe;
 819         }
 820         talloc_free(c);
 821         return status;
 822 }
 823
 824
 825 /*
 826   open a rpc connection to a rpc pipe, using the specified
 827   binding structure to determine the endpoint and options - sync version
 828 */
 829 _PUBLIC_ NTSTATUS dcerpc_pipe_connect_b(TALLOC_CTX *parent_ctx,
 830                                struct dcerpc_pipe **pp,
 831                                struct dcerpc_binding *binding,
 832                                const struct ndr_interface_table *table,
 833                                struct cli_credentials *credentials,
 834                                struct tevent_context *ev,
 835                                struct loadparm_context *lp_ctx)
 836 {
 837         struct composite_context *c;
 838
 839         c = dcerpc_pipe_connect_b_send(parent_ctx, binding, table,
 840                                        credentials, ev, lp_ctx);
 841         return dcerpc_pipe_connect_b_recv(c, parent_ctx, pp);
 842 }
 843
 844
 845 struct pipe_conn_state {
 846         struct dcerpc_pipe *pipe;
 847 };
 848
 849
 850 static void continue_pipe_connect_b(struct composite_context *ctx);
 851
 852
 853 /*
 854   Initiate rpc connection to a rpc pipe, using the specified string
 855   binding to determine the endpoint and options.
 856   The string is to be parsed to a binding structure first.
 857 */
 858 _PUBLIC_ struct composite_context* dcerpc_pipe_connect_send(TALLOC_CTX *parent_ctx,
 859                                                    const char *binding,
 860                                                    const struct ndr_interface_table *table,
 861                                                    struct cli_credentials *credentials,
 862                                                    struct tevent_context *ev, struct loadparm_context *lp_ctx)
 863 {
 864         struct composite_context *c;
 865         struct pipe_conn_state *s;
 866         struct dcerpc_binding *b;
 867         struct composite_context *pipe_conn_req;
 868
 869         /* composite context allocation and setup */
 870         c = composite_create(parent_ctx, ev);
 871         if (c == NULL) {
 872                 return NULL;
 873         }
 874
 875         s = talloc_zero(c, struct pipe_conn_state);
 876         if (composite_nomem(s, c)) return c;
 877         c->private_data = s;
 878
 879         /* parse binding string to the structure */
 880         c->status = dcerpc_parse_binding(c, binding, &b);
 881         if (!NT_STATUS_IS_OK(c->status)) {
 882                 DEBUG(0, ("Failed to parse dcerpc binding '%s'\n", binding));
 883                 composite_error(c, c->status);
 884                 return c;
 885         }
 886
 887         DEBUG(3, ("Using binding %s\n", dcerpc_binding_string(c, b)));
 888
 889         /*
 890            start connecting to a rpc pipe after binding structure
 891            is established
 892          */
 893         pipe_conn_req = dcerpc_pipe_connect_b_send(c, b, table,
 894                                                    credentials, ev, lp_ctx);
 895         composite_continue(c, pipe_conn_req, continue_pipe_connect_b, c);
 896         return c;
 897 }
 898
 899
 900 /*
 901   Stage 2 of pipe_connect: Receive result of actual pipe connect request
 902   and say if we're done ok
 903 */
 904 static void continue_pipe_connect_b(struct composite_context *ctx)
 905 {
 906         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 907                                                       struct composite_context);
 908         struct pipe_conn_state *s = talloc_get_type(c->private_data,
 909                                                     struct pipe_conn_state);
 910
 911         c->status = dcerpc_pipe_connect_b_recv(ctx, c, &s->pipe);
 912         talloc_steal(s, s->pipe);
 913         if (!composite_is_ok(c)) return;
 914
 915         composite_done(c);
 916 }
 917
 918
 919 /*
 920   Receive result of pipe connect (using binding string) request
 921   and return connected pipe structure.
 922 */
 923 NTSTATUS dcerpc_pipe_connect_recv(struct composite_context *c,
 924                                   TALLOC_CTX *mem_ctx,
 925                                   struct dcerpc_pipe **pp)
 926 {
 927         NTSTATUS status;
 928         struct pipe_conn_state *s;
 929
 930         status = composite_wait(c);
 931         if (NT_STATUS_IS_OK(status)) {
 932                 s = talloc_get_type(c->private_data, struct pipe_conn_state);
 933                 *pp = talloc_steal(mem_ctx, s->pipe);
 934         }
 935         talloc_free(c);
 936         return status;
 937 }
 938
 939
 940 /*
 941   Open a rpc connection to a rpc pipe, using the specified string
 942   binding to determine the endpoint and options - sync version
 943 */
 944 _PUBLIC_ NTSTATUS dcerpc_pipe_connect(TALLOC_CTX *parent_ctx,
 945                              struct dcerpc_pipe **pp,
 946                              const char *binding,
 947                              const struct ndr_interface_table *table,
 948                              struct cli_credentials *credentials,
 949                              struct tevent_context *ev,
 950                              struct loadparm_context *lp_ctx)
 951 {
 952         struct composite_context *c;
 953         c = dcerpc_pipe_connect_send(parent_ctx, binding,
 954                                      table, credentials, ev, lp_ctx);
 955         return dcerpc_pipe_connect_recv(c, parent_ctx, pp);
 956 }
 957