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                         &options,
 259                         lpcfg_socket_options(lp_ctx),
 260                         lpcfg_gensec_settings(mem_ctx, lp_ctx));
 261         if (composite_nomem(subreq, c)) return c;
 262         tevent_req_set_callback(subreq, continue_smb2_connect, c);
 263         return c;
 264 }
 265
 266
 267 /*
 268   Receive result of a rpc connection to a rpc pipe on SMB2
 269 */
 270 static NTSTATUS dcerpc_pipe_connect_ncacn_np_smb2_recv(struct composite_context *c)
 271 {
 272         NTSTATUS status = composite_wait(c);
 273
 274         talloc_free(c);
 275         return status;
 276 }
 277
 278
 279 struct pipe_ip_tcp_state {
 280         struct dcerpc_pipe_connect io;
 281         const char *localaddr;
 282         const char *host;
 283         const char *target_hostname;
 284         uint32_t port;
 285 };
 286
 287
 288 /*
 289   Stage 2 of ncacn_ip_tcp: rpc pipe opened (or not)
 290 */
 291 static void continue_pipe_open_ncacn_ip_tcp(struct composite_context *ctx)
 292 {
 293         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 294                                                       struct composite_context);
 295
 296         /* receive result of named pipe open request on tcp/ip */
 297         c->status = dcerpc_pipe_open_tcp_recv(ctx);
 298         if (!composite_is_ok(c)) return;
 299
 300         composite_done(c);
 301 }
 302
 303
 304 /*
 305   Initiate async open of a rpc connection to a rpc pipe on TCP/IP using
 306   the binding structure to determine the endpoint and options
 307 */
 308 static struct composite_context* dcerpc_pipe_connect_ncacn_ip_tcp_send(TALLOC_CTX *mem_ctx,
 309                                                                        struct dcerpc_pipe_connect *io)
 310 {
 311         struct composite_context *c;
 312         struct pipe_ip_tcp_state *s;
 313         struct composite_context *pipe_req;
 314
 315         /* composite context allocation and setup */
 316         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 317         if (c == NULL) return NULL;
 318
 319         s = talloc_zero(c, struct pipe_ip_tcp_state);
 320         if (composite_nomem(s, c)) return c;
 321         c->private_data = s;
 322
 323         /* store input parameters in state structure */
 324         s->io               = *io;
 325         s->localaddr        = talloc_reference(c, io->binding->localaddress);
 326         s->host             = talloc_reference(c, io->binding->host);
 327         s->target_hostname  = talloc_reference(c, io->binding->target_hostname);
 328                              /* port number is a binding endpoint here */
 329         s->port             = atoi(io->binding->endpoint);
 330
 331         /* send pipe open request on tcp/ip */
 332         pipe_req = dcerpc_pipe_open_tcp_send(s->io.pipe->conn, s->localaddr, s->host, s->target_hostname,
 333                                              s->port, io->resolve_ctx);
 334         composite_continue(c, pipe_req, continue_pipe_open_ncacn_ip_tcp, c);
 335         return c;
 336 }
 337
 338
 339 /*
 340   Receive result of a rpc connection to a rpc pipe on TCP/IP
 341 */
 342 static NTSTATUS dcerpc_pipe_connect_ncacn_ip_tcp_recv(struct composite_context *c)
 343 {
 344         NTSTATUS status = composite_wait(c);
 345
 346         talloc_free(c);
 347         return status;
 348 }
 349
 350
 351 struct pipe_unix_state {
 352         struct dcerpc_pipe_connect io;
 353         const char *path;
 354 };
 355
 356
 357 /*
 358   Stage 2 of ncacn_unix: rpc pipe opened (or not)
 359 */
 360 static void continue_pipe_open_ncacn_unix_stream(struct composite_context *ctx)
 361 {
 362         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 363                                                       struct composite_context);
 364
 365         /* receive result of pipe open request on unix socket */
 366         c->status = dcerpc_pipe_open_unix_stream_recv(ctx);
 367         if (!composite_is_ok(c)) return;
 368
 369         composite_done(c);
 370 }
 371
 372
 373 /*
 374   Initiate async open of a rpc connection to a rpc pipe on unix socket using
 375   the binding structure to determine the endpoint and options
 376 */
 377 static struct composite_context* dcerpc_pipe_connect_ncacn_unix_stream_send(TALLOC_CTX *mem_ctx,
 378                                                                             struct dcerpc_pipe_connect *io)
 379 {
 380         struct composite_context *c;
 381         struct pipe_unix_state *s;
 382         struct composite_context *pipe_req;
 383
 384         /* composite context allocation and setup */
 385         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 386         if (c == NULL) return NULL;
 387
 388         s = talloc_zero(c, struct pipe_unix_state);
 389         if (composite_nomem(s, c)) return c;
 390         c->private_data = s;
 391
 392         /* prepare pipe open parameters and store them in state structure
 393            also, verify whether biding endpoint is not null */
 394         s->io = *io;
 395
 396         if (!io->binding->endpoint) {
 397                 DEBUG(0, ("Path to unix socket not specified\n"));
 398                 composite_error(c, NT_STATUS_INVALID_PARAMETER);
 399                 return c;
 400         }
 401
 402         s->path  = talloc_strdup(c, io->binding->endpoint);  /* path is a binding endpoint here */
 403         if (composite_nomem(s->path, c)) return c;
 404
 405         /* send pipe open request on unix socket */
 406         pipe_req = dcerpc_pipe_open_unix_stream_send(s->io.pipe->conn, s->path);
 407         composite_continue(c, pipe_req, continue_pipe_open_ncacn_unix_stream, c);
 408         return c;
 409 }
 410
 411
 412 /*
 413   Receive result of a rpc connection to a pipe on unix socket
 414 */
 415 static NTSTATUS dcerpc_pipe_connect_ncacn_unix_stream_recv(struct composite_context *c)
 416 {
 417         NTSTATUS status = composite_wait(c);
 418
 419         talloc_free(c);
 420         return status;
 421 }
 422
 423
 424 struct pipe_ncalrpc_state {
 425         struct dcerpc_pipe_connect io;
 426 };
 427
 428 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c);
 429
 430 /*
 431   Stage 2 of ncalrpc: rpc pipe opened (or not)
 432 */
 433 static void continue_pipe_open_ncalrpc(struct composite_context *ctx)
 434 {
 435         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 436                                                       struct composite_context);
 437
 438         /* receive result of pipe open request on ncalrpc */
 439         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 440         if (!composite_is_ok(c)) return;
 441
 442         composite_done(c);
 443 }
 444
 445
 446 /*
 447    Initiate async open of a rpc connection request on NCALRPC using
 448    the binding structure to determine the endpoint and options
 449 */
 450 static struct composite_context* dcerpc_pipe_connect_ncalrpc_send(TALLOC_CTX *mem_ctx,
 451                                                                   struct dcerpc_pipe_connect *io, struct loadparm_context *lp_ctx)
 452 {
 453         struct composite_context *c;
 454         struct pipe_ncalrpc_state *s;
 455         struct composite_context *pipe_req;
 456
 457         /* composite context allocation and setup */
 458         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 459         if (c == NULL) return NULL;
 460
 461         s = talloc_zero(c, struct pipe_ncalrpc_state);
 462         if (composite_nomem(s, c)) return c;
 463         c->private_data = s;
 464
 465         /* store input parameters in state structure */
 466         s->io  = *io;
 467
 468         /* send pipe open request */
 469         pipe_req = dcerpc_pipe_open_pipe_send(s->io.pipe->conn, lpcfg_ncalrpc_dir(lp_ctx),
 470                                               s->io.binding->endpoint);
 471         composite_continue(c, pipe_req, continue_pipe_open_ncalrpc, c);
 472         return c;
 473 }
 474
 475
 476 /*
 477   Receive result of a rpc connection to a rpc pipe on NCALRPC
 478 */
 479 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c)
 480 {
 481         NTSTATUS status = composite_wait(c);
 482
 483         talloc_free(c);
 484         return status;
 485 }
 486
 487
 488 struct pipe_connect_state {
 489         struct dcerpc_pipe *pipe;
 490         struct dcerpc_binding *binding;
 491         const struct ndr_interface_table *table;
 492         struct cli_credentials *credentials;
 493         struct loadparm_context *lp_ctx;
 494 };
 495
 496
 497 static void continue_map_binding(struct composite_context *ctx);
 498 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s);
 499 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx);
 500 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx);
 501 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx);
 502 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx);
 503 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx);
 504 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s);
 505 static void continue_pipe_auth(struct composite_context *ctx);
 506
 507
 508 /*
 509   Stage 2 of pipe_connect_b: Receive result of endpoint mapping
 510 */
 511 static void continue_map_binding(struct composite_context *ctx)
 512 {
 513         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 514                                                       struct composite_context);
 515         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 516                                                        struct pipe_connect_state);
 517
 518         c->status = dcerpc_epm_map_binding_recv(ctx);
 519         if (!composite_is_ok(c)) return;
 520
 521         DEBUG(4,("Mapped to DCERPC endpoint %s\n", s->binding->endpoint));
 522
 523         continue_connect(c, s);
 524 }
 525
 526
 527 /*
 528   Stage 2 of pipe_connect_b: Continue connection after endpoint is known
 529 */
 530 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s)
 531 {
 532         struct dcerpc_pipe_connect pc;
 533
 534         /* potential exits to another stage by sending an async request */
 535         struct composite_context *ncacn_np_smb2_req;
 536         struct composite_context *ncacn_np_smb_req;
 537         struct composite_context *ncacn_ip_tcp_req;
 538         struct composite_context *ncacn_unix_req;
 539         struct composite_context *ncalrpc_req;
 540
 541         /* dcerpc pipe connect input parameters */
 542         pc.pipe         = s->pipe;
 543         pc.binding      = s->binding;
 544         pc.pipe_name    = NULL;
 545         pc.interface    = s->table;
 546         pc.creds        = s->credentials;
 547         pc.resolve_ctx  = lpcfg_resolve_context(s->lp_ctx);
 548
 549         /* connect dcerpc pipe depending on required transport */
 550         switch (s->binding->transport) {
 551         case NCACN_NP:
 552                 if (pc.binding->flags & DCERPC_SMB2) {
 553                         /* new varient of SMB a.k.a. SMB2 */
 554                         ncacn_np_smb2_req = dcerpc_pipe_connect_ncacn_np_smb2_send(c, &pc, s->lp_ctx);
 555                         composite_continue(c, ncacn_np_smb2_req, continue_pipe_connect_ncacn_np_smb2, c);
 556                         return;
 557
 558                 } else {
 559                         /* good old ordinary SMB */
 560                         ncacn_np_smb_req = dcerpc_pipe_connect_ncacn_np_smb_send(c, &pc, s->lp_ctx);
 561                         composite_continue(c, ncacn_np_smb_req, continue_pipe_connect_ncacn_np_smb, c);
 562                         return;
 563                 }
 564                 break;
 565
 566         case NCACN_IP_TCP:
 567                 ncacn_ip_tcp_req = dcerpc_pipe_connect_ncacn_ip_tcp_send(c, &pc);
 568                 composite_continue(c, ncacn_ip_tcp_req, continue_pipe_connect_ncacn_ip_tcp, c);
 569                 return;
 570
 571         case NCACN_UNIX_STREAM:
 572                 ncacn_unix_req = dcerpc_pipe_connect_ncacn_unix_stream_send(c, &pc);
 573                 composite_continue(c, ncacn_unix_req, continue_pipe_connect_ncacn_unix, c);
 574                 return;
 575
 576         case NCALRPC:
 577                 ncalrpc_req = dcerpc_pipe_connect_ncalrpc_send(c, &pc, s->lp_ctx);
 578                 composite_continue(c, ncalrpc_req, continue_pipe_connect_ncalrpc, c);
 579                 return;
 580
 581         default:
 582                 /* looks like a transport we don't support now */
 583                 composite_error(c, NT_STATUS_NOT_SUPPORTED);
 584         }
 585 }
 586
 587
 588 /*
 589   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 590   named pipe on smb2
 591 */
 592 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx)
 593 {
 594         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 595                                                       struct composite_context);
 596         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 597                                                        struct pipe_connect_state);
 598
 599         c->status = dcerpc_pipe_connect_ncacn_np_smb2_recv(ctx);
 600         if (!composite_is_ok(c)) return;
 601
 602         continue_pipe_connect(c, s);
 603 }
 604
 605
 606 /*
 607   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 608   named pipe on smb
 609 */
 610 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx)
 611 {
 612         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 613                                                       struct composite_context);
 614         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 615                                                        struct pipe_connect_state);
 616
 617         c->status = dcerpc_pipe_connect_ncacn_np_smb_recv(ctx);
 618         if (!composite_is_ok(c)) return;
 619
 620         continue_pipe_connect(c, s);
 621 }
 622
 623
 624 /*
 625   Stage 3 of pipe_connect_b: Receive result of pipe connect request on tcp/ip
 626 */
 627 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx)
 628 {
 629         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 630                                                       struct composite_context);
 631         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 632                                                        struct pipe_connect_state);
 633
 634         c->status = dcerpc_pipe_connect_ncacn_ip_tcp_recv(ctx);
 635         if (!composite_is_ok(c)) return;
 636
 637         continue_pipe_connect(c, s);
 638 }
 639
 640
 641 /*
 642   Stage 3 of pipe_connect_b: Receive result of pipe connect request on unix socket
 643 */
 644 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx)
 645 {
 646         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 647                                                       struct composite_context);
 648         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 649                                                        struct pipe_connect_state);
 650
 651         c->status = dcerpc_pipe_connect_ncacn_unix_stream_recv(ctx);
 652         if (!composite_is_ok(c)) return;
 653
 654         continue_pipe_connect(c, s);
 655 }
 656
 657
 658 /*
 659   Stage 3 of pipe_connect_b: Receive result of pipe connect request on local rpc
 660 */
 661 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx)
 662 {
 663         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 664                                                       struct composite_context);
 665         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 666                                                        struct pipe_connect_state);
 667
 668         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 669         if (!composite_is_ok(c)) return;
 670
 671         continue_pipe_connect(c, s);
 672 }
 673
 674
 675 /*
 676   Stage 4 of pipe_connect_b: Start an authentication on connected dcerpc pipe
 677   depending on credentials and binding flags passed.
 678 */
 679 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s)
 680 {
 681         struct composite_context *auth_bind_req;
 682
 683         s->pipe->binding = s->binding;
 684         if (!talloc_reference(s->pipe, s->binding)) {
 685                 composite_error(c, NT_STATUS_NO_MEMORY);
 686                 return;
 687         }
 688
 689         auth_bind_req = dcerpc_pipe_auth_send(s->pipe, s->binding, s->table,
 690                                               s->credentials, s->lp_ctx);
 691         composite_continue(c, auth_bind_req, continue_pipe_auth, c);
 692 }
 693
 694
 695 /*
 696   Stage 5 of pipe_connect_b: Receive result of pipe authentication request
 697   and say if all went ok
 698 */
 699 static void continue_pipe_auth(struct composite_context *ctx)
 700 {
 701         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 702                                                       struct composite_context);
 703         struct pipe_connect_state *s = talloc_get_type(c->private_data, struct pipe_connect_state);
 704
 705         c->status = dcerpc_pipe_auth_recv(ctx, s, &s->pipe);
 706         if (!composite_is_ok(c)) return;
 707
 708         composite_done(c);
 709 }
 710
 711
 712 /*
 713   handle timeouts of a dcerpc connect
 714 */
 715 static void dcerpc_connect_timeout_handler(struct tevent_context *ev, struct tevent_timer *te,
 716                                            struct timeval t, void *private_data)
 717 {
 718         struct composite_context *c = talloc_get_type(private_data, struct composite_context);
 719         composite_error(c, NT_STATUS_IO_TIMEOUT);
 720 }
 721
 722 /*
 723   start a request to open a rpc connection to a rpc pipe, using
 724   specified binding structure to determine the endpoint and options
 725 */
 726 _PUBLIC_ struct composite_context* dcerpc_pipe_connect_b_send(TALLOC_CTX *parent_ctx,
 727                                                      struct dcerpc_binding *binding,
 728                                                      const struct ndr_interface_table *table,
 729                                                      struct cli_credentials *credentials,
 730                                                      struct tevent_context *ev,
 731                                                      struct loadparm_context *lp_ctx)
 732 {
 733         struct composite_context *c;
 734         struct pipe_connect_state *s;
 735         struct tevent_context *new_ev = NULL;
 736
 737         /* composite context allocation and setup */
 738         c = composite_create(parent_ctx, ev);
 739         if (c == NULL) {
 740                 talloc_free(new_ev);
 741                 return NULL;
 742         }
 743         talloc_steal(c, new_ev);
 744
 745         s = talloc_zero(c, struct pipe_connect_state);
 746         if (composite_nomem(s, c)) return c;
 747         c->private_data = s;
 748
 749         /* initialise dcerpc pipe structure */
 750         s->pipe = dcerpc_pipe_init(c, ev);
 751         if (composite_nomem(s->pipe, c)) return c;
 752
 753         if (DEBUGLEVEL >= 10)
 754                 s->pipe->conn->packet_log_dir = lpcfg_lockdir(lp_ctx);
 755
 756         /* store parameters in state structure */
 757         s->binding      = binding;
 758         s->table        = table;
 759         s->credentials  = credentials;
 760         s->lp_ctx       = lp_ctx;
 761
 762         event_add_timed(c->event_ctx, c,
 763                         timeval_current_ofs(DCERPC_REQUEST_TIMEOUT, 0),
 764                         dcerpc_connect_timeout_handler, c);
 765
 766         switch (s->binding->transport) {
 767         case NCA_UNKNOWN: {
 768                 struct composite_context *binding_req;
 769                 binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
 770                                                           s->pipe->conn->event_ctx,
 771                                                           s->lp_ctx);
 772                 composite_continue(c, binding_req, continue_map_binding, c);
 773                 return c;
 774                 }
 775
 776         case NCACN_NP:
 777         case NCACN_IP_TCP:
 778         case NCALRPC:
 779                 if (!s->binding->endpoint) {
 780                         struct composite_context *binding_req;
 781                         binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
 782                                                                   s->pipe->conn->event_ctx,
 783                                                                   s->lp_ctx);
 784                         composite_continue(c, binding_req, continue_map_binding, c);
 785                         return c;
 786                 }
 787
 788         default:
 789                 break;
 790         }
 791
 792         continue_connect(c, s);
 793         return c;
 794 }
 795
 796
 797 /*
 798   receive result of a request to open a rpc connection to a rpc pipe
 799 */
 800 _PUBLIC_ NTSTATUS dcerpc_pipe_connect_b_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
 801                                     struct dcerpc_pipe **p)
 802 {
 803         NTSTATUS status;
 804         struct pipe_connect_state *s;
 805
 806         status = composite_wait(c);
 807
 808         if (NT_STATUS_IS_OK(status)) {
 809                 s = talloc_get_type(c->private_data, struct pipe_connect_state);
 810                 talloc_steal(mem_ctx, s->pipe);
 811                 *p = s->pipe;
 812         }
 813         talloc_free(c);
 814         return status;
 815 }
 816
 817
 818 /*
 819   open a rpc connection to a rpc pipe, using the specified
 820   binding structure to determine the endpoint and options - sync version
 821 */
 822 _PUBLIC_ NTSTATUS dcerpc_pipe_connect_b(TALLOC_CTX *parent_ctx,
 823                                struct dcerpc_pipe **pp,
 824                                struct dcerpc_binding *binding,
 825                                const struct ndr_interface_table *table,
 826                                struct cli_credentials *credentials,
 827                                struct tevent_context *ev,
 828                                struct loadparm_context *lp_ctx)
 829 {
 830         struct composite_context *c;
 831
 832         c = dcerpc_pipe_connect_b_send(parent_ctx, binding, table,
 833                                        credentials, ev, lp_ctx);
 834         return dcerpc_pipe_connect_b_recv(c, parent_ctx, pp);
 835 }
 836
 837
 838 struct pipe_conn_state {
 839         struct dcerpc_pipe *pipe;
 840 };
 841
 842
 843 static void continue_pipe_connect_b(struct composite_context *ctx);
 844
 845
 846 /*
 847   Initiate rpc connection to a rpc pipe, using the specified string
 848   binding to determine the endpoint and options.
 849   The string is to be parsed to a binding structure first.
 850 */
 851 _PUBLIC_ struct composite_context* dcerpc_pipe_connect_send(TALLOC_CTX *parent_ctx,
 852                                                    const char *binding,
 853                                                    const struct ndr_interface_table *table,
 854                                                    struct cli_credentials *credentials,
 855                                                    struct tevent_context *ev, struct loadparm_context *lp_ctx)
 856 {
 857         struct composite_context *c;
 858         struct pipe_conn_state *s;
 859         struct dcerpc_binding *b;
 860         struct composite_context *pipe_conn_req;
 861
 862         /* composite context allocation and setup */
 863         c = composite_create(parent_ctx, ev);
 864         if (c == NULL) {
 865                 return NULL;
 866         }
 867
 868         s = talloc_zero(c, struct pipe_conn_state);
 869         if (composite_nomem(s, c)) return c;
 870         c->private_data = s;
 871
 872         /* parse binding string to the structure */
 873         c->status = dcerpc_parse_binding(c, binding, &b);
 874         if (!NT_STATUS_IS_OK(c->status)) {
 875                 DEBUG(0, ("Failed to parse dcerpc binding '%s'\n", binding));
 876                 composite_error(c, c->status);
 877                 return c;
 878         }
 879
 880         DEBUG(3, ("Using binding %s\n", dcerpc_binding_string(c, b)));
 881
 882         /*
 883            start connecting to a rpc pipe after binding structure
 884            is established
 885          */
 886         pipe_conn_req = dcerpc_pipe_connect_b_send(c, b, table,
 887                                                    credentials, ev, lp_ctx);
 888         composite_continue(c, pipe_conn_req, continue_pipe_connect_b, c);
 889         return c;
 890 }
 891
 892
 893 /*
 894   Stage 2 of pipe_connect: Receive result of actual pipe connect request
 895   and say if we're done ok
 896 */
 897 static void continue_pipe_connect_b(struct composite_context *ctx)
 898 {
 899         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 900                                                       struct composite_context);
 901         struct pipe_conn_state *s = talloc_get_type(c->private_data,
 902                                                     struct pipe_conn_state);
 903
 904         c->status = dcerpc_pipe_connect_b_recv(ctx, c, &s->pipe);
 905         talloc_steal(s, s->pipe);
 906         if (!composite_is_ok(c)) return;
 907
 908         composite_done(c);
 909 }
 910
 911
 912 /*
 913   Receive result of pipe connect (using binding string) request
 914   and return connected pipe structure.
 915 */
 916 NTSTATUS dcerpc_pipe_connect_recv(struct composite_context *c,
 917                                   TALLOC_CTX *mem_ctx,
 918                                   struct dcerpc_pipe **pp)
 919 {
 920         NTSTATUS status;
 921         struct pipe_conn_state *s;
 922
 923         status = composite_wait(c);
 924         if (NT_STATUS_IS_OK(status)) {
 925                 s = talloc_get_type(c->private_data, struct pipe_conn_state);
 926                 *pp = talloc_steal(mem_ctx, s->pipe);
 927         }
 928         talloc_free(c);
 929         return status;
 930 }
 931
 932
 933 /*
 934   Open a rpc connection to a rpc pipe, using the specified string
 935   binding to determine the endpoint and options - sync version
 936 */
 937 _PUBLIC_ NTSTATUS dcerpc_pipe_connect(TALLOC_CTX *parent_ctx,
 938                              struct dcerpc_pipe **pp,
 939                              const char *binding,
 940                              const struct ndr_interface_table *table,
 941                              struct cli_credentials *credentials,
 942                              struct tevent_context *ev,
 943                              struct loadparm_context *lp_ctx)
 944 {
 945         struct composite_context *c;
 946         c = dcerpc_pipe_connect_send(parent_ctx, binding,
 947                                      table, credentials, ev, lp_ctx);
 948         return dcerpc_pipe_connect_recv(c, parent_ctx, pp);
 949 }
 950