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