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 "auth/credentials/credentials.h"
  34 #include "param/param.h"
  35 #include "libcli/resolve/resolve.h"
  36
  37
  38 struct pipe_np_smb_state {
  39         struct smb_composite_connect conn;
  40         struct smbcli_tree *tree;
  41         struct dcerpc_pipe_connect io;
  42 };
  43
  44
  45 /*
  46   Stage 3 of ncacn_np_smb: Named pipe opened (or not)
  47 */
  48 static void continue_pipe_open_smb(struct composite_context *ctx)
  49 {
  50         struct composite_context *c = talloc_get_type(ctx->async.private_data,
  51                                                       struct composite_context);
  52
  53         /* receive result of named pipe open request on smb */
  54         c->status = dcerpc_pipe_open_smb_recv(ctx);
  55         if (!composite_is_ok(c)) return;
  56
  57         composite_done(c);
  58 }
  59
  60
  61 /*
  62   Stage 2 of ncacn_np_smb: Open a named pipe after successful smb connection
  63 */
  64 static void continue_smb_connect(struct composite_context *ctx)
  65 {
  66         struct composite_context *open_ctx;
  67         struct composite_context *c = talloc_get_type(ctx->async.private_data,
  68                                                       struct composite_context);
  69         struct pipe_np_smb_state *s = talloc_get_type(c->private_data,
  70                                                       struct pipe_np_smb_state);
  71
  72         /* receive result of smb connect request */
  73         c->status = smb_composite_connect_recv(ctx, c);
  74         if (!composite_is_ok(c)) return;
  75
  76         /* prepare named pipe open parameters */
  77         s->tree         = s->conn.out.tree;
  78         s->io.pipe_name = s->io.binding->endpoint;
  79
  80         /* send named pipe open request */
  81         open_ctx = dcerpc_pipe_open_smb_send(s->io.pipe, s->tree, s->io.pipe_name);
  82         if (composite_nomem(open_ctx, c)) return;
  83
  84         composite_continue(c, open_ctx, continue_pipe_open_smb, c);
  85 }
  86
  87
  88 /*
  89   Initiate async open of a rpc connection to a rpc pipe on SMB using
  90   the binding structure to determine the endpoint and options
  91 */
  92 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)
  93 {
  94         struct composite_context *c;
  95         struct pipe_np_smb_state *s;
  96         struct composite_context *conn_req;
  97         struct smb_composite_connect *conn;
  98
  99         /* composite context allocation and setup */
 100         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 101         if (c == NULL) return NULL;
 102
 103         s = talloc_zero(c, struct pipe_np_smb_state);
 104         if (composite_nomem(s, c)) return c;
 105         c->private_data = s;
 106
 107         s->io  = *io;
 108         conn   = &s->conn;
 109
 110         /* prepare smb connection parameters: we're connecting to IPC$ share on
 111            remote rpc server */
 112         conn->in.dest_host              = s->io.binding->host;
 113         conn->in.dest_ports                  = lp_smb_ports(lp_ctx);
 114         if (s->io.binding->target_hostname == NULL)
 115                 conn->in.called_name = "*SMBSERVER"; /* FIXME: This is invalid */
 116         else
 117                 conn->in.called_name            = s->io.binding->target_hostname;
 118         conn->in.service                = "IPC$";
 119         conn->in.service_type           = NULL;
 120         conn->in.workgroup              = lp_workgroup(lp_ctx);
 121
 122         conn->in.max_xmit = lp_max_xmit(lp_ctx);
 123         conn->in.max_mux = lp_maxmux(lp_ctx);
 124         conn->in.ntstatus_support = lp_nt_status_support(lp_ctx);
 125         conn->in.max_protocol = lp_cli_maxprotocol(lp_ctx);
 126         conn->in.unicode = lp_unicode(lp_ctx);
 127         conn->in.use_spnego = lp_use_spnego(lp_ctx) && lp_nt_status_support(lp_ctx);
 128         conn->in.signing = lp_client_signing(lp_ctx);
 129
 130         /*
 131          * provide proper credentials - user supplied, but allow a
 132          * fallback to anonymous if this is an schannel connection
 133          * (might be NT4 not allowing machine logins at session
 134          * setup).
 135          */
 136         s->conn.in.credentials = s->io.creds;
 137         if (s->io.binding->flags & DCERPC_SCHANNEL) {
 138                 conn->in.fallback_to_anonymous  = true;
 139         } else {
 140                 conn->in.fallback_to_anonymous  = false;
 141         }
 142
 143         /* send smb connect request */
 144         conn_req = smb_composite_connect_send(conn, s->io.pipe->conn,
 145                                               lp_resolve_context(lp_ctx),
 146                                               s->io.pipe->conn->event_ctx);
 147         if (composite_nomem(conn_req, c)) return c;
 148
 149         composite_continue(c, conn_req, continue_smb_connect, c);
 150         return c;
 151 }
 152
 153
 154 /*
 155   Receive result of a rpc connection to a rpc pipe on SMB
 156 */
 157 static NTSTATUS dcerpc_pipe_connect_ncacn_np_smb_recv(struct composite_context *c)
 158 {
 159         NTSTATUS status = composite_wait(c);
 160
 161         talloc_free(c);
 162         return status;
 163 }
 164
 165
 166 struct pipe_np_smb2_state {
 167         struct smb2_tree *tree;
 168         struct dcerpc_pipe_connect io;
 169 };
 170
 171
 172 /*
 173   Stage 3 of ncacn_np_smb: Named pipe opened (or not)
 174 */
 175 static void continue_pipe_open_smb2(struct composite_context *ctx)
 176 {
 177         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 178                                                       struct composite_context);
 179
 180         /* receive result of named pipe open request on smb2 */
 181         c->status = dcerpc_pipe_open_smb2_recv(ctx);
 182         if (!composite_is_ok(c)) return;
 183
 184         composite_done(c);
 185 }
 186
 187
 188 /*
 189   Stage 2 of ncacn_np_smb2: Open a named pipe after successful smb2 connection
 190 */
 191 static void continue_smb2_connect(struct composite_context *ctx)
 192 {
 193         struct composite_context *open_req;
 194         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 195                                                       struct composite_context);
 196         struct pipe_np_smb2_state *s = talloc_get_type(c->private_data,
 197                                                        struct pipe_np_smb2_state);
 198
 199         /* receive result of smb2 connect request */
 200         c->status = smb2_connect_recv(ctx, c, &s->tree);
 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 composite_context *conn_req;
 226
 227         /* composite context allocation and setup */
 228         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 229         if (c == NULL) return NULL;
 230
 231         s = talloc_zero(c, struct pipe_np_smb2_state);
 232         if (composite_nomem(s, c)) return c;
 233         c->private_data = s;
 234
 235         s->io = *io;
 236
 237         /*
 238          * provide proper credentials - user supplied or anonymous in case this is
 239          * schannel connection
 240          */
 241         if (s->io.binding->flags & DCERPC_SCHANNEL) {
 242                 s->io.creds = cli_credentials_init(mem_ctx);
 243                 if (composite_nomem(s->io.creds, c)) return c;
 244
 245                 cli_credentials_guess(s->io.creds, lp_ctx);
 246         }
 247
 248         /* send smb2 connect request */
 249         conn_req = smb2_connect_send(mem_ctx, s->io.binding->host, "IPC$",
 250                                      s->io.resolve_ctx,
 251                                      s->io.creds,
 252                                      c->event_ctx);
 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 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         if (ev == NULL) {
 726                 new_ev = event_context_init(parent_ctx);
 727                 if (new_ev == NULL) return NULL;
 728                 ev = new_ev;
 729         }
 730
 731         /* composite context allocation and setup */
 732         c = composite_create(parent_ctx, ev);
 733         if (c == NULL) {
 734                 talloc_free(new_ev);
 735                 return NULL;
 736         }
 737         talloc_steal(c, new_ev);
 738
 739         s = talloc_zero(c, struct pipe_connect_state);
 740         if (composite_nomem(s, c)) return c;
 741         c->private_data = s;
 742
 743         /* initialise dcerpc pipe structure */
 744         s->pipe = dcerpc_pipe_init(c, ev, lp_iconv_convenience(lp_ctx));
 745         if (composite_nomem(s->pipe, c)) return c;
 746
 747         /* store parameters in state structure */
 748         s->binding      = binding;
 749         s->table        = table;
 750         s->credentials  = credentials;
 751         s->lp_ctx       = lp_ctx;
 752
 753         event_add_timed(c->event_ctx, c,
 754                         timeval_current_ofs(DCERPC_REQUEST_TIMEOUT, 0),
 755                         dcerpc_connect_timeout_handler, c);
 756
 757         switch (s->binding->transport) {
 758         case NCA_UNKNOWN: {
 759                 struct composite_context *binding_req;
 760                 binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
 761                                                           s->pipe->conn->event_ctx,
 762                                                           s->lp_ctx);
 763                 composite_continue(c, binding_req, continue_map_binding, c);
 764                 return c;
 765                 }
 766
 767         case NCACN_NP:
 768         case NCACN_IP_TCP:
 769         case NCALRPC:
 770                 if (!s->binding->endpoint) {
 771                         struct composite_context *binding_req;
 772                         binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
 773                                                                   s->pipe->conn->event_ctx,
 774                                                                   s->lp_ctx);
 775                         composite_continue(c, binding_req, continue_map_binding, c);
 776                         return c;
 777                 }
 778
 779         default:
 780                 break;
 781         }
 782
 783         continue_connect(c, s);
 784         return c;
 785 }
 786
 787
 788 /*
 789   receive result of a request to open a rpc connection to a rpc pipe
 790 */
 791 NTSTATUS dcerpc_pipe_connect_b_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
 792                                     struct dcerpc_pipe **p)
 793 {
 794         NTSTATUS status;
 795         struct pipe_connect_state *s;
 796
 797         status = composite_wait(c);
 798
 799         if (NT_STATUS_IS_OK(status)) {
 800                 s = talloc_get_type(c->private_data, struct pipe_connect_state);
 801                 talloc_steal(mem_ctx, s->pipe);
 802                 *p = s->pipe;
 803         }
 804         talloc_free(c);
 805         return status;
 806 }
 807
 808
 809 /*
 810   open a rpc connection to a rpc pipe, using the specified
 811   binding structure to determine the endpoint and options - sync version
 812 */
 813 NTSTATUS dcerpc_pipe_connect_b(TALLOC_CTX *parent_ctx,
 814                                struct dcerpc_pipe **pp,
 815                                struct dcerpc_binding *binding,
 816                                const struct ndr_interface_table *table,
 817                                struct cli_credentials *credentials,
 818                                struct event_context *ev,
 819                                struct loadparm_context *lp_ctx)
 820 {
 821         struct composite_context *c;
 822
 823         c = dcerpc_pipe_connect_b_send(parent_ctx, binding, table,
 824                                        credentials, ev, lp_ctx);
 825         return dcerpc_pipe_connect_b_recv(c, parent_ctx, pp);
 826 }
 827
 828
 829 struct pipe_conn_state {
 830         struct dcerpc_pipe *pipe;
 831 };
 832
 833
 834 static void continue_pipe_connect_b(struct composite_context *ctx);
 835
 836
 837 /*
 838   Initiate rpc connection to a rpc pipe, using the specified string
 839   binding to determine the endpoint and options.
 840   The string is to be parsed to a binding structure first.
 841 */
 842 struct composite_context* dcerpc_pipe_connect_send(TALLOC_CTX *parent_ctx,
 843                                                    const char *binding,
 844                                                    const struct ndr_interface_table *table,
 845                                                    struct cli_credentials *credentials,
 846                                                    struct event_context *ev, struct loadparm_context *lp_ctx)
 847 {
 848         struct composite_context *c;
 849         struct pipe_conn_state *s;
 850         struct dcerpc_binding *b;
 851         struct composite_context *pipe_conn_req;
 852         struct event_context *new_ev = NULL;
 853
 854         if (ev == NULL) {
 855                 new_ev = event_context_init(parent_ctx);
 856                 if (new_ev == NULL) return NULL;
 857                 ev = new_ev;
 858         }
 859
 860         /* composite context allocation and setup */
 861         c = composite_create(parent_ctx, ev);
 862         if (c == NULL) {
 863                 talloc_free(new_ev);
 864                 return NULL;
 865         }
 866         talloc_steal(c, new_ev);
 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 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 event_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