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         if (io->binding->localaddress != NULL) {
 327                 s->localaddr = talloc_strdup(s, io->binding->localaddress);
 328                 if (composite_nomem(s->localaddr, c)) return c;
 329         }
 330         if (io->binding->host != NULL) {
 331                 s->host = talloc_strdup(s, io->binding->host);
 332                 if (composite_nomem(s->host, c)) return c;
 333         }
 334         if (io->binding->target_hostname != NULL) {
 335                 s->target_hostname = talloc_strdup(s, io->binding->target_hostname);
 336                 if (composite_nomem(s->target_hostname, c)) return c;
 337         }
 338                              /* port number is a binding endpoint here */
 339         s->port             = atoi(io->binding->endpoint);
 340
 341         /* send pipe open request on tcp/ip */
 342         pipe_req = dcerpc_pipe_open_tcp_send(s->io.pipe->conn, s->localaddr, s->host, s->target_hostname,
 343                                              s->port, io->resolve_ctx);
 344         composite_continue(c, pipe_req, continue_pipe_open_ncacn_ip_tcp, c);
 345         return c;
 346 }
 347
 348
 349 /*
 350   Receive result of a rpc connection to a rpc pipe on TCP/IP
 351 */
 352 static NTSTATUS dcerpc_pipe_connect_ncacn_ip_tcp_recv(struct composite_context *c)
 353 {
 354         NTSTATUS status = composite_wait(c);
 355
 356         talloc_free(c);
 357         return status;
 358 }
 359
 360
 361 struct pipe_unix_state {
 362         struct dcerpc_pipe_connect io;
 363         const char *path;
 364 };
 365
 366
 367 /*
 368   Stage 2 of ncacn_unix: rpc pipe opened (or not)
 369 */
 370 static void continue_pipe_open_ncacn_unix_stream(struct composite_context *ctx)
 371 {
 372         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 373                                                       struct composite_context);
 374
 375         /* receive result of pipe open request on unix socket */
 376         c->status = dcerpc_pipe_open_unix_stream_recv(ctx);
 377         if (!composite_is_ok(c)) return;
 378
 379         composite_done(c);
 380 }
 381
 382
 383 /*
 384   Initiate async open of a rpc connection to a rpc pipe on unix socket using
 385   the binding structure to determine the endpoint and options
 386 */
 387 static struct composite_context* dcerpc_pipe_connect_ncacn_unix_stream_send(TALLOC_CTX *mem_ctx,
 388                                                                             struct dcerpc_pipe_connect *io)
 389 {
 390         struct composite_context *c;
 391         struct pipe_unix_state *s;
 392         struct composite_context *pipe_req;
 393
 394         /* composite context allocation and setup */
 395         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 396         if (c == NULL) return NULL;
 397
 398         s = talloc_zero(c, struct pipe_unix_state);
 399         if (composite_nomem(s, c)) return c;
 400         c->private_data = s;
 401
 402         /* prepare pipe open parameters and store them in state structure
 403            also, verify whether biding endpoint is not null */
 404         s->io = *io;
 405
 406         if (!io->binding->endpoint) {
 407                 DEBUG(0, ("Path to unix socket not specified\n"));
 408                 composite_error(c, NT_STATUS_INVALID_PARAMETER);
 409                 return c;
 410         }
 411
 412         s->path  = talloc_strdup(c, io->binding->endpoint);  /* path is a binding endpoint here */
 413         if (composite_nomem(s->path, c)) return c;
 414
 415         /* send pipe open request on unix socket */
 416         pipe_req = dcerpc_pipe_open_unix_stream_send(s->io.pipe->conn, s->path);
 417         composite_continue(c, pipe_req, continue_pipe_open_ncacn_unix_stream, c);
 418         return c;
 419 }
 420
 421
 422 /*
 423   Receive result of a rpc connection to a pipe on unix socket
 424 */
 425 static NTSTATUS dcerpc_pipe_connect_ncacn_unix_stream_recv(struct composite_context *c)
 426 {
 427         NTSTATUS status = composite_wait(c);
 428
 429         talloc_free(c);
 430         return status;
 431 }
 432
 433
 434 struct pipe_ncalrpc_state {
 435         struct dcerpc_pipe_connect io;
 436 };
 437
 438 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c);
 439
 440 /*
 441   Stage 2 of ncalrpc: rpc pipe opened (or not)
 442 */
 443 static void continue_pipe_open_ncalrpc(struct composite_context *ctx)
 444 {
 445         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 446                                                       struct composite_context);
 447
 448         /* receive result of pipe open request on ncalrpc */
 449         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 450         if (!composite_is_ok(c)) return;
 451
 452         composite_done(c);
 453 }
 454
 455
 456 /*
 457    Initiate async open of a rpc connection request on NCALRPC using
 458    the binding structure to determine the endpoint and options
 459 */
 460 static struct composite_context* dcerpc_pipe_connect_ncalrpc_send(TALLOC_CTX *mem_ctx,
 461                                                                   struct dcerpc_pipe_connect *io, struct loadparm_context *lp_ctx)
 462 {
 463         struct composite_context *c;
 464         struct pipe_ncalrpc_state *s;
 465         struct composite_context *pipe_req;
 466
 467         /* composite context allocation and setup */
 468         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 469         if (c == NULL) return NULL;
 470
 471         s = talloc_zero(c, struct pipe_ncalrpc_state);
 472         if (composite_nomem(s, c)) return c;
 473         c->private_data = s;
 474
 475         /* store input parameters in state structure */
 476         s->io  = *io;
 477
 478         /* send pipe open request */
 479         pipe_req = dcerpc_pipe_open_pipe_send(s->io.pipe->conn, lpcfg_ncalrpc_dir(lp_ctx),
 480                                               s->io.binding->endpoint);
 481         composite_continue(c, pipe_req, continue_pipe_open_ncalrpc, c);
 482         return c;
 483 }
 484
 485
 486 /*
 487   Receive result of a rpc connection to a rpc pipe on NCALRPC
 488 */
 489 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c)
 490 {
 491         NTSTATUS status = composite_wait(c);
 492
 493         talloc_free(c);
 494         return status;
 495 }
 496
 497
 498 struct pipe_connect_state {
 499         struct dcerpc_pipe *pipe;
 500         struct dcerpc_binding *binding;
 501         const struct ndr_interface_table *table;
 502         struct cli_credentials *credentials;
 503         struct loadparm_context *lp_ctx;
 504 };
 505
 506
 507 static void continue_map_binding(struct composite_context *ctx);
 508 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s);
 509 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx);
 510 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx);
 511 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx);
 512 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx);
 513 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx);
 514 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s);
 515 static void continue_pipe_auth(struct composite_context *ctx);
 516
 517
 518 /*
 519   Stage 2 of pipe_connect_b: Receive result of endpoint mapping
 520 */
 521 static void continue_map_binding(struct composite_context *ctx)
 522 {
 523         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 524                                                       struct composite_context);
 525         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 526                                                        struct pipe_connect_state);
 527
 528         c->status = dcerpc_epm_map_binding_recv(ctx);
 529         if (!composite_is_ok(c)) return;
 530
 531         DEBUG(4,("Mapped to DCERPC endpoint %s\n", s->binding->endpoint));
 532
 533         continue_connect(c, s);
 534 }
 535
 536
 537 /*
 538   Stage 2 of pipe_connect_b: Continue connection after endpoint is known
 539 */
 540 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s)
 541 {
 542         struct dcerpc_pipe_connect pc;
 543
 544         /* potential exits to another stage by sending an async request */
 545         struct composite_context *ncacn_np_smb2_req;
 546         struct composite_context *ncacn_np_smb_req;
 547         struct composite_context *ncacn_ip_tcp_req;
 548         struct composite_context *ncacn_unix_req;
 549         struct composite_context *ncalrpc_req;
 550
 551         /* dcerpc pipe connect input parameters */
 552         pc.pipe         = s->pipe;
 553         pc.binding      = s->binding;
 554         pc.pipe_name    = NULL;
 555         pc.interface    = s->table;
 556         pc.creds        = s->credentials;
 557         pc.resolve_ctx  = lpcfg_resolve_context(s->lp_ctx);
 558
 559         /* connect dcerpc pipe depending on required transport */
 560         switch (s->binding->transport) {
 561         case NCACN_NP:
 562                 if (pc.binding->flags & DCERPC_SMB2) {
 563                         /* new varient of SMB a.k.a. SMB2 */
 564                         ncacn_np_smb2_req = dcerpc_pipe_connect_ncacn_np_smb2_send(c, &pc, s->lp_ctx);
 565                         composite_continue(c, ncacn_np_smb2_req, continue_pipe_connect_ncacn_np_smb2, c);
 566                         return;
 567
 568                 } else {
 569                         /* good old ordinary SMB */
 570                         ncacn_np_smb_req = dcerpc_pipe_connect_ncacn_np_smb_send(c, &pc, s->lp_ctx);
 571                         composite_continue(c, ncacn_np_smb_req, continue_pipe_connect_ncacn_np_smb, c);
 572                         return;
 573                 }
 574                 break;
 575
 576         case NCACN_IP_TCP:
 577                 ncacn_ip_tcp_req = dcerpc_pipe_connect_ncacn_ip_tcp_send(c, &pc);
 578                 composite_continue(c, ncacn_ip_tcp_req, continue_pipe_connect_ncacn_ip_tcp, c);
 579                 return;
 580
 581         case NCACN_UNIX_STREAM:
 582                 ncacn_unix_req = dcerpc_pipe_connect_ncacn_unix_stream_send(c, &pc);
 583                 composite_continue(c, ncacn_unix_req, continue_pipe_connect_ncacn_unix, c);
 584                 return;
 585
 586         case NCALRPC:
 587                 ncalrpc_req = dcerpc_pipe_connect_ncalrpc_send(c, &pc, s->lp_ctx);
 588                 composite_continue(c, ncalrpc_req, continue_pipe_connect_ncalrpc, c);
 589                 return;
 590
 591         default:
 592                 /* looks like a transport we don't support now */
 593                 composite_error(c, NT_STATUS_NOT_SUPPORTED);
 594         }
 595 }
 596
 597
 598 /*
 599   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 600   named pipe on smb2
 601 */
 602 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx)
 603 {
 604         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 605                                                       struct composite_context);
 606         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 607                                                        struct pipe_connect_state);
 608
 609         c->status = dcerpc_pipe_connect_ncacn_np_smb2_recv(ctx);
 610         if (!composite_is_ok(c)) return;
 611
 612         continue_pipe_connect(c, s);
 613 }
 614
 615
 616 /*
 617   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 618   named pipe on smb
 619 */
 620 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx)
 621 {
 622         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 623                                                       struct composite_context);
 624         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 625                                                        struct pipe_connect_state);
 626
 627         c->status = dcerpc_pipe_connect_ncacn_np_smb_recv(ctx);
 628         if (!composite_is_ok(c)) return;
 629
 630         continue_pipe_connect(c, s);
 631 }
 632
 633
 634 /*
 635   Stage 3 of pipe_connect_b: Receive result of pipe connect request on tcp/ip
 636 */
 637 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx)
 638 {
 639         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 640                                                       struct composite_context);
 641         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 642                                                        struct pipe_connect_state);
 643
 644         c->status = dcerpc_pipe_connect_ncacn_ip_tcp_recv(ctx);
 645         if (!composite_is_ok(c)) return;
 646
 647         continue_pipe_connect(c, s);
 648 }
 649
 650
 651 /*
 652   Stage 3 of pipe_connect_b: Receive result of pipe connect request on unix socket
 653 */
 654 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx)
 655 {
 656         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 657                                                       struct composite_context);
 658         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 659                                                        struct pipe_connect_state);
 660
 661         c->status = dcerpc_pipe_connect_ncacn_unix_stream_recv(ctx);
 662         if (!composite_is_ok(c)) return;
 663
 664         continue_pipe_connect(c, s);
 665 }
 666
 667
 668 /*
 669   Stage 3 of pipe_connect_b: Receive result of pipe connect request on local rpc
 670 */
 671 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx)
 672 {
 673         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 674                                                       struct composite_context);
 675         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 676                                                        struct pipe_connect_state);
 677
 678         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 679         if (!composite_is_ok(c)) return;
 680
 681         continue_pipe_connect(c, s);
 682 }
 683
 684
 685 /*
 686   Stage 4 of pipe_connect_b: Start an authentication on connected dcerpc pipe
 687   depending on credentials and binding flags passed.
 688 */
 689 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s)
 690 {
 691         struct composite_context *auth_bind_req;
 692
 693         s->pipe->binding = s->binding;
 694         if (!talloc_reference(s->pipe, s->binding)) {
 695                 composite_error(c, NT_STATUS_NO_MEMORY);
 696                 return;
 697         }
 698
 699         auth_bind_req = dcerpc_pipe_auth_send(s->pipe, s->binding, s->table,
 700                                               s->credentials, s->lp_ctx);
 701         composite_continue(c, auth_bind_req, continue_pipe_auth, c);
 702 }
 703
 704
 705 /*
 706   Stage 5 of pipe_connect_b: Receive result of pipe authentication request
 707   and say if all went ok
 708 */
 709 static void continue_pipe_auth(struct composite_context *ctx)
 710 {
 711         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 712                                                       struct composite_context);
 713         struct pipe_connect_state *s = talloc_get_type(c->private_data, struct pipe_connect_state);
 714
 715         c->status = dcerpc_pipe_auth_recv(ctx, s, &s->pipe);
 716         if (!composite_is_ok(c)) return;
 717
 718         composite_done(c);
 719 }
 720
 721
 722 /*
 723   handle timeouts of a dcerpc connect
 724 */
 725 static void dcerpc_connect_timeout_handler(struct tevent_context *ev, struct tevent_timer *te,
 726                                            struct timeval t, void *private_data)
 727 {
 728         struct composite_context *c = talloc_get_type_abort(private_data,
 729                                                       struct composite_context);
 730         struct pipe_connect_state *s = talloc_get_type_abort(c->private_data, struct pipe_connect_state);
 731         if (!s->pipe->inhibit_timeout_processing) {
 732                 composite_error(c, NT_STATUS_IO_TIMEOUT);
 733         } else {
 734                 s->pipe->timed_out = true;
 735         }
 736 }
 737
 738 /*
 739   start a request to open a rpc connection to a rpc pipe, using
 740   specified binding structure to determine the endpoint and options
 741 */
 742 _PUBLIC_ struct composite_context* dcerpc_pipe_connect_b_send(TALLOC_CTX *parent_ctx,
 743                                                      struct dcerpc_binding *binding,
 744                                                      const struct ndr_interface_table *table,
 745                                                      struct cli_credentials *credentials,
 746                                                      struct tevent_context *ev,
 747                                                      struct loadparm_context *lp_ctx)
 748 {
 749         struct composite_context *c;
 750         struct pipe_connect_state *s;
 751
 752         /* composite context allocation and setup */
 753         c = composite_create(parent_ctx, ev);
 754         if (c == NULL) {
 755                 return NULL;
 756         }
 757
 758         s = talloc_zero(c, struct pipe_connect_state);
 759         if (composite_nomem(s, c)) return c;
 760         c->private_data = s;
 761
 762         /* initialise dcerpc pipe structure */
 763         s->pipe = dcerpc_pipe_init(c, ev);
 764         if (composite_nomem(s->pipe, c)) return c;
 765
 766         if (DEBUGLEVEL >= 10)
 767                 s->pipe->conn->packet_log_dir = lpcfg_lockdir(lp_ctx);
 768
 769         /* store parameters in state structure */
 770         s->binding      = binding;
 771         s->table        = table;
 772         s->credentials  = credentials;
 773         s->lp_ctx       = lp_ctx;
 774
 775         s->pipe->timed_out = false;
 776         s->pipe->inhibit_timeout_processing = false;
 777
 778         tevent_add_timer(c->event_ctx, c,
 779                          timeval_current_ofs(DCERPC_REQUEST_TIMEOUT, 0),
 780                          dcerpc_connect_timeout_handler, c);
 781
 782         switch (s->binding->transport) {
 783         case NCA_UNKNOWN: {
 784                 struct composite_context *binding_req;
 785                 binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
 786                                                           s->pipe->conn->event_ctx,
 787                                                           s->lp_ctx);
 788                 composite_continue(c, binding_req, continue_map_binding, c);
 789                 return c;
 790                 }
 791
 792         case NCACN_NP:
 793         case NCACN_IP_TCP:
 794         case NCALRPC:
 795                 if (!s->binding->endpoint) {
 796                         struct composite_context *binding_req;
 797                         binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
 798                                                                   s->pipe->conn->event_ctx,
 799                                                                   s->lp_ctx);
 800                         composite_continue(c, binding_req, continue_map_binding, c);
 801                         return c;
 802                 }
 803
 804         default:
 805                 break;
 806         }
 807
 808         continue_connect(c, s);
 809         return c;
 810 }
 811
 812
 813 /*
 814   receive result of a request to open a rpc connection to a rpc pipe
 815 */
 816 _PUBLIC_ NTSTATUS dcerpc_pipe_connect_b_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
 817                                     struct dcerpc_pipe **p)
 818 {
 819         NTSTATUS status;
 820         struct pipe_connect_state *s;
 821
 822         status = composite_wait(c);
 823
 824         if (NT_STATUS_IS_OK(status)) {
 825                 s = talloc_get_type(c->private_data, struct pipe_connect_state);
 826                 talloc_steal(mem_ctx, s->pipe);
 827                 *p = s->pipe;
 828         }
 829         talloc_free(c);
 830         return status;
 831 }
 832
 833
 834 /*
 835   open a rpc connection to a rpc pipe, using the specified
 836   binding structure to determine the endpoint and options - sync version
 837 */
 838 _PUBLIC_ NTSTATUS dcerpc_pipe_connect_b(TALLOC_CTX *parent_ctx,
 839                                struct dcerpc_pipe **pp,
 840                                struct dcerpc_binding *binding,
 841                                const struct ndr_interface_table *table,
 842                                struct cli_credentials *credentials,
 843                                struct tevent_context *ev,
 844                                struct loadparm_context *lp_ctx)
 845 {
 846         struct composite_context *c;
 847
 848         c = dcerpc_pipe_connect_b_send(parent_ctx, binding, table,
 849                                        credentials, ev, lp_ctx);
 850         return dcerpc_pipe_connect_b_recv(c, parent_ctx, pp);
 851 }
 852
 853
 854 struct pipe_conn_state {
 855         struct dcerpc_pipe *pipe;
 856 };
 857
 858
 859 static void continue_pipe_connect_b(struct composite_context *ctx);
 860
 861
 862 /*
 863   Initiate rpc connection to a rpc pipe, using the specified string
 864   binding to determine the endpoint and options.
 865   The string is to be parsed to a binding structure first.
 866 */
 867 _PUBLIC_ struct composite_context* dcerpc_pipe_connect_send(TALLOC_CTX *parent_ctx,
 868                                                    const char *binding,
 869                                                    const struct ndr_interface_table *table,
 870                                                    struct cli_credentials *credentials,
 871                                                    struct tevent_context *ev, struct loadparm_context *lp_ctx)
 872 {
 873         struct composite_context *c;
 874         struct pipe_conn_state *s;
 875         struct dcerpc_binding *b;
 876         struct composite_context *pipe_conn_req;
 877
 878         /* composite context allocation and setup */
 879         c = composite_create(parent_ctx, ev);
 880         if (c == NULL) {
 881                 return NULL;
 882         }
 883
 884         s = talloc_zero(c, struct pipe_conn_state);
 885         if (composite_nomem(s, c)) return c;
 886         c->private_data = s;
 887
 888         /* parse binding string to the structure */
 889         c->status = dcerpc_parse_binding(c, binding, &b);
 890         if (!NT_STATUS_IS_OK(c->status)) {
 891                 DEBUG(0, ("Failed to parse dcerpc binding '%s'\n", binding));
 892                 composite_error(c, c->status);
 893                 return c;
 894         }
 895
 896         DEBUG(3, ("Using binding %s\n", dcerpc_binding_string(c, b)));
 897
 898         /*
 899            start connecting to a rpc pipe after binding structure
 900            is established
 901          */
 902         pipe_conn_req = dcerpc_pipe_connect_b_send(c, b, table,
 903                                                    credentials, ev, lp_ctx);
 904         composite_continue(c, pipe_conn_req, continue_pipe_connect_b, c);
 905         return c;
 906 }
 907
 908
 909 /*
 910   Stage 2 of pipe_connect: Receive result of actual pipe connect request
 911   and say if we're done ok
 912 */
 913 static void continue_pipe_connect_b(struct composite_context *ctx)
 914 {
 915         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 916                                                       struct composite_context);
 917         struct pipe_conn_state *s = talloc_get_type(c->private_data,
 918                                                     struct pipe_conn_state);
 919
 920         c->status = dcerpc_pipe_connect_b_recv(ctx, c, &s->pipe);
 921         talloc_steal(s, s->pipe);
 922         if (!composite_is_ok(c)) return;
 923
 924         composite_done(c);
 925 }
 926
 927
 928 /*
 929   Receive result of pipe connect (using binding string) request
 930   and return connected pipe structure.
 931 */
 932 NTSTATUS dcerpc_pipe_connect_recv(struct composite_context *c,
 933                                   TALLOC_CTX *mem_ctx,
 934                                   struct dcerpc_pipe **pp)
 935 {
 936         NTSTATUS status;
 937         struct pipe_conn_state *s;
 938
 939         status = composite_wait(c);
 940         if (NT_STATUS_IS_OK(status)) {
 941                 s = talloc_get_type(c->private_data, struct pipe_conn_state);
 942                 *pp = talloc_steal(mem_ctx, s->pipe);
 943         }
 944         talloc_free(c);
 945         return status;
 946 }
 947
 948
 949 /*
 950   Open a rpc connection to a rpc pipe, using the specified string
 951   binding to determine the endpoint and options - sync version
 952 */
 953 _PUBLIC_ NTSTATUS dcerpc_pipe_connect(TALLOC_CTX *parent_ctx,
 954                              struct dcerpc_pipe **pp,
 955                              const char *binding,
 956                              const struct ndr_interface_table *table,
 957                              struct cli_credentials *credentials,
 958                              struct tevent_context *ev,
 959                              struct loadparm_context *lp_ctx)
 960 {
 961         struct composite_context *c;
 962         c = dcerpc_pipe_connect_send(parent_ctx, binding,
 963                                      table, credentials, ev, lp_ctx);
 964         return dcerpc_pipe_connect_recv(c, parent_ctx, pp);
 965 }
 966