source/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
 129         /*
 130          * provide proper credentials - user supplied, but allow a
 131          * fallback to anonymous if this is an schannel connection
 132          * (might be NT4 not allowing machine logins at session
 133          * setup).
 134          */
 135         s->conn.in.credentials = s->io.creds;
 136         if (s->io.binding->flags & DCERPC_SCHANNEL) {
 137                 conn->in.fallback_to_anonymous  = true;
 138         } else {
 139                 conn->in.fallback_to_anonymous  = false;
 140         }
 141
 142         /* send smb connect request */
 143         conn_req = smb_composite_connect_send(conn, s->io.pipe->conn,
 144                                               lp_resolve_context(lp_ctx),
 145                                               s->io.pipe->conn->event_ctx);
 146         if (composite_nomem(conn_req, c)) return c;
 147
 148         composite_continue(c, conn_req, continue_smb_connect, c);
 149         return c;
 150 }
 151
 152
 153 /*
 154   Receive result of a rpc connection to a rpc pipe on SMB
 155 */
 156 static NTSTATUS dcerpc_pipe_connect_ncacn_np_smb_recv(struct composite_context *c)
 157 {
 158         NTSTATUS status = composite_wait(c);
 159
 160         talloc_free(c);
 161         return status;
 162 }
 163
 164
 165 struct pipe_np_smb2_state {
 166         struct smb2_tree *tree;
 167         struct dcerpc_pipe_connect io;
 168 };
 169
 170
 171 /*
 172   Stage 3 of ncacn_np_smb: Named pipe opened (or not)
 173 */
 174 static void continue_pipe_open_smb2(struct composite_context *ctx)
 175 {
 176         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 177                                                       struct composite_context);
 178
 179         /* receive result of named pipe open request on smb2 */
 180         c->status = dcerpc_pipe_open_smb2_recv(ctx);
 181         if (!composite_is_ok(c)) return;
 182
 183         composite_done(c);
 184 }
 185
 186
 187 /*
 188   Stage 2 of ncacn_np_smb2: Open a named pipe after successful smb2 connection
 189 */
 190 static void continue_smb2_connect(struct composite_context *ctx)
 191 {
 192         struct composite_context *open_req;
 193         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 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(ctx, c, &s->tree);
 200         if (!composite_is_ok(c)) return;
 201
 202         /* prepare named pipe open parameters */
 203         s->io.pipe_name = s->io.binding->endpoint;
 204
 205         /* send named pipe open request */
 206         open_req = dcerpc_pipe_open_smb2_send(s->io.pipe, s->tree, s->io.pipe_name);
 207         if (composite_nomem(open_req, c)) return;
 208
 209         composite_continue(c, open_req, continue_pipe_open_smb2, c);
 210 }
 211
 212
 213 /*
 214    Initiate async open of a rpc connection request on SMB2 using
 215    the binding structure to determine the endpoint and options
 216 */
 217 static struct composite_context *dcerpc_pipe_connect_ncacn_np_smb2_send(
 218                                         TALLOC_CTX *mem_ctx,
 219                                         struct dcerpc_pipe_connect *io,
 220                                         struct loadparm_context *lp_ctx)
 221 {
 222         struct composite_context *c;
 223         struct pipe_np_smb2_state *s;
 224         struct composite_context *conn_req;
 225
 226         /* composite context allocation and setup */
 227         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 228         if (c == NULL) return NULL;
 229
 230         s = talloc_zero(c, struct pipe_np_smb2_state);
 231         if (composite_nomem(s, c)) return c;
 232         c->private_data = s;
 233
 234         s->io = *io;
 235
 236         /*
 237          * provide proper credentials - user supplied or anonymous in case this is
 238          * schannel connection
 239          */
 240         if (s->io.binding->flags & DCERPC_SCHANNEL) {
 241                 s->io.creds = cli_credentials_init(mem_ctx);
 242                 if (composite_nomem(s->io.creds, c)) return c;
 243
 244                 cli_credentials_guess(s->io.creds, lp_ctx);
 245         }
 246
 247         /* send smb2 connect request */
 248         conn_req = smb2_connect_send(mem_ctx, s->io.binding->host, "IPC$",
 249                                      s->io.resolve_ctx,
 250                                      s->io.creds,
 251                                      c->event_ctx);
 252         composite_continue(c, conn_req, continue_smb2_connect, c);
 253         return c;
 254 }
 255
 256
 257 /*
 258   Receive result of a rpc connection to a rpc pipe on SMB2
 259 */
 260 static NTSTATUS dcerpc_pipe_connect_ncacn_np_smb2_recv(struct composite_context *c)
 261 {
 262         NTSTATUS status = composite_wait(c);
 263
 264         talloc_free(c);
 265         return status;
 266 }
 267
 268
 269 struct pipe_ip_tcp_state {
 270         struct dcerpc_pipe_connect io;
 271         const char *host;
 272         const char *target_hostname;
 273         uint32_t port;
 274 };
 275
 276
 277 /*
 278   Stage 2 of ncacn_ip_tcp: rpc pipe opened (or not)
 279 */
 280 static void continue_pipe_open_ncacn_ip_tcp(struct composite_context *ctx)
 281 {
 282         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 283                                                       struct composite_context);
 284
 285         /* receive result of named pipe open request on tcp/ip */
 286         c->status = dcerpc_pipe_open_tcp_recv(ctx);
 287         if (!composite_is_ok(c)) return;
 288
 289         composite_done(c);
 290 }
 291
 292
 293 /*
 294   Initiate async open of a rpc connection to a rpc pipe on TCP/IP using
 295   the binding structure to determine the endpoint and options
 296 */
 297 static struct composite_context* dcerpc_pipe_connect_ncacn_ip_tcp_send(TALLOC_CTX *mem_ctx,
 298                                                                        struct dcerpc_pipe_connect *io)
 299 {
 300         struct composite_context *c;
 301         struct pipe_ip_tcp_state *s;
 302         struct composite_context *pipe_req;
 303
 304         /* composite context allocation and setup */
 305         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 306         if (c == NULL) return NULL;
 307
 308         s = talloc_zero(c, struct pipe_ip_tcp_state);
 309         if (composite_nomem(s, c)) return c;
 310         c->private_data = s;
 311
 312         /* store input parameters in state structure */
 313         s->io               = *io;
 314         s->host             = talloc_reference(c, io->binding->host);
 315         s->target_hostname  = talloc_reference(c, io->binding->target_hostname);
 316                              /* port number is a binding endpoint here */
 317         s->port             = atoi(io->binding->endpoint);
 318
 319         /* send pipe open request on tcp/ip */
 320         pipe_req = dcerpc_pipe_open_tcp_send(s->io.pipe->conn, s->host, s->target_hostname,
 321                                              s->port, io->resolve_ctx);
 322         composite_continue(c, pipe_req, continue_pipe_open_ncacn_ip_tcp, c);
 323         return c;
 324 }
 325
 326
 327 /*
 328   Receive result of a rpc connection to a rpc pipe on TCP/IP
 329 */
 330 static NTSTATUS dcerpc_pipe_connect_ncacn_ip_tcp_recv(struct composite_context *c)
 331 {
 332         NTSTATUS status = composite_wait(c);
 333
 334         talloc_free(c);
 335         return status;
 336 }
 337
 338
 339 struct pipe_unix_state {
 340         struct dcerpc_pipe_connect io;
 341         const char *path;
 342 };
 343
 344
 345 /*
 346   Stage 2 of ncacn_unix: rpc pipe opened (or not)
 347 */
 348 static void continue_pipe_open_ncacn_unix_stream(struct composite_context *ctx)
 349 {
 350         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 351                                                       struct composite_context);
 352
 353         /* receive result of pipe open request on unix socket */
 354         c->status = dcerpc_pipe_open_unix_stream_recv(ctx);
 355         if (!composite_is_ok(c)) return;
 356
 357         composite_done(c);
 358 }
 359
 360
 361 /*
 362   Initiate async open of a rpc connection to a rpc pipe on unix socket using
 363   the binding structure to determine the endpoint and options
 364 */
 365 static struct composite_context* dcerpc_pipe_connect_ncacn_unix_stream_send(TALLOC_CTX *mem_ctx,
 366                                                                             struct dcerpc_pipe_connect *io)
 367 {
 368         struct composite_context *c;
 369         struct pipe_unix_state *s;
 370         struct composite_context *pipe_req;
 371
 372         /* composite context allocation and setup */
 373         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 374         if (c == NULL) return NULL;
 375
 376         s = talloc_zero(c, struct pipe_unix_state);
 377         if (composite_nomem(s, c)) return c;
 378         c->private_data = s;
 379
 380         /* prepare pipe open parameters and store them in state structure
 381            also, verify whether biding endpoint is not null */
 382         s->io = *io;
 383
 384         if (!io->binding->endpoint) {
 385                 DEBUG(0, ("Path to unix socket not specified\n"));
 386                 composite_error(c, NT_STATUS_INVALID_PARAMETER);
 387                 return c;
 388         }
 389
 390         s->path  = talloc_strdup(c, io->binding->endpoint);  /* path is a binding endpoint here */
 391         if (composite_nomem(s->path, c)) return c;
 392
 393         /* send pipe open request on unix socket */
 394         pipe_req = dcerpc_pipe_open_unix_stream_send(s->io.pipe->conn, s->path);
 395         composite_continue(c, pipe_req, continue_pipe_open_ncacn_unix_stream, c);
 396         return c;
 397 }
 398
 399
 400 /*
 401   Receive result of a rpc connection to a pipe on unix socket
 402 */
 403 static NTSTATUS dcerpc_pipe_connect_ncacn_unix_stream_recv(struct composite_context *c)
 404 {
 405         NTSTATUS status = composite_wait(c);
 406
 407         talloc_free(c);
 408         return status;
 409 }
 410
 411
 412 struct pipe_ncalrpc_state {
 413         struct dcerpc_pipe_connect io;
 414 };
 415
 416 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c);
 417
 418 /*
 419   Stage 2 of ncalrpc: rpc pipe opened (or not)
 420 */
 421 static void continue_pipe_open_ncalrpc(struct composite_context *ctx)
 422 {
 423         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 424                                                       struct composite_context);
 425
 426         /* receive result of pipe open request on ncalrpc */
 427         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 428         if (!composite_is_ok(c)) return;
 429
 430         composite_done(c);
 431 }
 432
 433
 434 /*
 435    Initiate async open of a rpc connection request on NCALRPC using
 436    the binding structure to determine the endpoint and options
 437 */
 438 static struct composite_context* dcerpc_pipe_connect_ncalrpc_send(TALLOC_CTX *mem_ctx,
 439                                                                   struct dcerpc_pipe_connect *io, struct loadparm_context *lp_ctx)
 440 {
 441         struct composite_context *c;
 442         struct pipe_ncalrpc_state *s;
 443         struct composite_context *pipe_req;
 444
 445         /* composite context allocation and setup */
 446         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 447         if (c == NULL) return NULL;
 448
 449         s = talloc_zero(c, struct pipe_ncalrpc_state);
 450         if (composite_nomem(s, c)) return c;
 451         c->private_data = s;
 452
 453         /* store input parameters in state structure */
 454         s->io  = *io;
 455
 456         /* send pipe open request */
 457         pipe_req = dcerpc_pipe_open_pipe_send(s->io.pipe->conn, lp_ncalrpc_dir(lp_ctx),
 458                                               s->io.binding->endpoint);
 459         composite_continue(c, pipe_req, continue_pipe_open_ncalrpc, c);
 460         return c;
 461 }
 462
 463
 464 /*
 465   Receive result of a rpc connection to a rpc pipe on NCALRPC
 466 */
 467 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c)
 468 {
 469         NTSTATUS status = composite_wait(c);
 470
 471         talloc_free(c);
 472         return status;
 473 }
 474
 475
 476 struct pipe_connect_state {
 477         struct dcerpc_pipe *pipe;
 478         struct dcerpc_binding *binding;
 479         const struct ndr_interface_table *table;
 480         struct cli_credentials *credentials;
 481         struct loadparm_context *lp_ctx;
 482 };
 483
 484
 485 static void continue_map_binding(struct composite_context *ctx);
 486 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s);
 487 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx);
 488 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx);
 489 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx);
 490 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx);
 491 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx);
 492 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s);
 493 static void continue_pipe_auth(struct composite_context *ctx);
 494
 495
 496 /*
 497   Stage 2 of pipe_connect_b: Receive result of endpoint mapping
 498 */
 499 static void continue_map_binding(struct composite_context *ctx)
 500 {
 501         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 502                                                       struct composite_context);
 503         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 504                                                        struct pipe_connect_state);
 505
 506         c->status = dcerpc_epm_map_binding_recv(ctx);
 507         if (!composite_is_ok(c)) return;
 508
 509         DEBUG(2,("Mapped to DCERPC endpoint %s\n", s->binding->endpoint));
 510
 511         continue_connect(c, s);
 512 }
 513
 514
 515 /*
 516   Stage 2 of pipe_connect_b: Continue connection after endpoint is known
 517 */
 518 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s)
 519 {
 520         struct dcerpc_pipe_connect pc;
 521
 522         /* potential exits to another stage by sending an async request */
 523         struct composite_context *ncacn_np_smb2_req;
 524         struct composite_context *ncacn_np_smb_req;
 525         struct composite_context *ncacn_ip_tcp_req;
 526         struct composite_context *ncacn_unix_req;
 527         struct composite_context *ncalrpc_req;
 528
 529         /* dcerpc pipe connect input parameters */
 530         pc.pipe         = s->pipe;
 531         pc.binding      = s->binding;
 532         pc.interface    = s->table;
 533         pc.creds        = s->credentials;
 534         pc.resolve_ctx  = lp_resolve_context(s->lp_ctx);
 535
 536         /* connect dcerpc pipe depending on required transport */
 537         switch (s->binding->transport) {
 538         case NCACN_NP:
 539                 if (pc.binding->flags & DCERPC_SMB2) {
 540                         /* new varient of SMB a.k.a. SMB2 */
 541                         ncacn_np_smb2_req = dcerpc_pipe_connect_ncacn_np_smb2_send(c, &pc, s->lp_ctx);
 542                         composite_continue(c, ncacn_np_smb2_req, continue_pipe_connect_ncacn_np_smb2, c);
 543                         return;
 544
 545                 } else {
 546                         /* good old ordinary SMB */
 547                         ncacn_np_smb_req = dcerpc_pipe_connect_ncacn_np_smb_send(c, &pc, s->lp_ctx);
 548                         composite_continue(c, ncacn_np_smb_req, continue_pipe_connect_ncacn_np_smb, c);
 549                         return;
 550                 }
 551                 break;
 552
 553         case NCACN_IP_TCP:
 554                 ncacn_ip_tcp_req = dcerpc_pipe_connect_ncacn_ip_tcp_send(c, &pc);
 555                 composite_continue(c, ncacn_ip_tcp_req, continue_pipe_connect_ncacn_ip_tcp, c);
 556                 return;
 557
 558         case NCACN_UNIX_STREAM:
 559                 ncacn_unix_req = dcerpc_pipe_connect_ncacn_unix_stream_send(c, &pc);
 560                 composite_continue(c, ncacn_unix_req, continue_pipe_connect_ncacn_unix, c);
 561                 return;
 562
 563         case NCALRPC:
 564                 ncalrpc_req = dcerpc_pipe_connect_ncalrpc_send(c, &pc, s->lp_ctx);
 565                 composite_continue(c, ncalrpc_req, continue_pipe_connect_ncalrpc, c);
 566                 return;
 567
 568         default:
 569                 /* looks like a transport we don't support now */
 570                 composite_error(c, NT_STATUS_NOT_SUPPORTED);
 571         }
 572 }
 573
 574
 575 /*
 576   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 577   named pipe on smb2
 578 */
 579 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx)
 580 {
 581         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 582                                                       struct composite_context);
 583         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 584                                                        struct pipe_connect_state);
 585
 586         c->status = dcerpc_pipe_connect_ncacn_np_smb2_recv(ctx);
 587         if (!composite_is_ok(c)) return;
 588
 589         continue_pipe_connect(c, s);
 590 }
 591
 592
 593 /*
 594   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 595   named pipe on smb
 596 */
 597 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx)
 598 {
 599         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 600                                                       struct composite_context);
 601         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 602                                                        struct pipe_connect_state);
 603
 604         c->status = dcerpc_pipe_connect_ncacn_np_smb_recv(ctx);
 605         if (!composite_is_ok(c)) return;
 606
 607         continue_pipe_connect(c, s);
 608 }
 609
 610
 611 /*
 612   Stage 3 of pipe_connect_b: Receive result of pipe connect request on tcp/ip
 613 */
 614 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx)
 615 {
 616         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 617                                                       struct composite_context);
 618         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 619                                                        struct pipe_connect_state);
 620
 621         c->status = dcerpc_pipe_connect_ncacn_ip_tcp_recv(ctx);
 622         if (!composite_is_ok(c)) return;
 623
 624         continue_pipe_connect(c, s);
 625 }
 626
 627
 628 /*
 629   Stage 3 of pipe_connect_b: Receive result of pipe connect request on unix socket
 630 */
 631 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx)
 632 {
 633         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 634                                                       struct composite_context);
 635         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 636                                                        struct pipe_connect_state);
 637
 638         c->status = dcerpc_pipe_connect_ncacn_unix_stream_recv(ctx);
 639         if (!composite_is_ok(c)) return;
 640
 641         continue_pipe_connect(c, s);
 642 }
 643
 644
 645 /*
 646   Stage 3 of pipe_connect_b: Receive result of pipe connect request on local rpc
 647 */
 648 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx)
 649 {
 650         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 651                                                       struct composite_context);
 652         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 653                                                        struct pipe_connect_state);
 654
 655         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 656         if (!composite_is_ok(c)) return;
 657
 658         continue_pipe_connect(c, s);
 659 }
 660
 661
 662 /*
 663   Stage 4 of pipe_connect_b: Start an authentication on connected dcerpc pipe
 664   depending on credentials and binding flags passed.
 665 */
 666 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s)
 667 {
 668         struct composite_context *auth_bind_req;
 669
 670         s->pipe->binding = s->binding;
 671         if (!talloc_reference(s->pipe, s->binding)) {
 672                 composite_error(c, NT_STATUS_NO_MEMORY);
 673                 return;
 674         }
 675
 676         auth_bind_req = dcerpc_pipe_auth_send(s->pipe, s->binding, s->table,
 677                                               s->credentials, s->lp_ctx);
 678         composite_continue(c, auth_bind_req, continue_pipe_auth, c);
 679 }
 680
 681
 682 /*
 683   Stage 5 of pipe_connect_b: Receive result of pipe authentication request
 684   and say if all went ok
 685 */
 686 static void continue_pipe_auth(struct composite_context *ctx)
 687 {
 688         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 689                                                       struct composite_context);
 690         struct pipe_connect_state *s = talloc_get_type(c->private_data, struct pipe_connect_state);
 691
 692         c->status = dcerpc_pipe_auth_recv(ctx, s, &s->pipe);
 693         if (!composite_is_ok(c)) return;
 694
 695         composite_done(c);
 696 }
 697
 698
 699 /*
 700   handle timeouts of a dcerpc connect
 701 */
 702 static void dcerpc_connect_timeout_handler(struct event_context *ev, struct timed_event *te,
 703                                            struct timeval t, void *private)
 704 {
 705         struct composite_context *c = talloc_get_type(private, struct composite_context);
 706         composite_error(c, NT_STATUS_IO_TIMEOUT);
 707 }
 708
 709 /*
 710   start a request to open a rpc connection to a rpc pipe, using
 711   specified binding structure to determine the endpoint and options
 712 */
 713 struct composite_context* dcerpc_pipe_connect_b_send(TALLOC_CTX *parent_ctx,
 714                                                      struct dcerpc_binding *binding,
 715                                                      const struct ndr_interface_table *table,
 716                                                      struct cli_credentials *credentials,
 717                                                      struct event_context *ev,
 718                                                      struct loadparm_context *lp_ctx)
 719 {
 720         struct composite_context *c;
 721         struct pipe_connect_state *s;
 722         struct event_context *new_ev = NULL;
 723
 724         if (ev == NULL) {
 725                 new_ev = event_context_init(parent_ctx);
 726                 if (new_ev == NULL) return NULL;
 727                 ev = new_ev;
 728         }
 729
 730         /* composite context allocation and setup */
 731         c = composite_create(parent_ctx, ev);
 732         if (c == NULL) {
 733                 talloc_free(new_ev);
 734                 return NULL;
 735         }
 736         talloc_steal(c, new_ev);
 737
 738         s = talloc_zero(c, struct pipe_connect_state);
 739         if (composite_nomem(s, c)) return c;
 740         c->private_data = s;
 741
 742         /* initialise dcerpc pipe structure */
 743         s->pipe = dcerpc_pipe_init(c, ev, lp_iconv_convenience(lp_ctx));
 744         if (composite_nomem(s->pipe, c)) return c;
 745
 746         /* store parameters in state structure */
 747         s->binding      = binding;
 748         s->table        = table;
 749         s->credentials  = credentials;
 750         s->lp_ctx       = lp_ctx;
 751
 752         event_add_timed(c->event_ctx, c,
 753                         timeval_current_ofs(DCERPC_REQUEST_TIMEOUT, 0),
 754                         dcerpc_connect_timeout_handler, c);
 755
 756         switch (s->binding->transport) {
 757         case NCA_UNKNOWN: {
 758                 struct composite_context *binding_req;
 759                 binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
 760                                                           s->pipe->conn->event_ctx,
 761                                                           s->lp_ctx);
 762                 composite_continue(c, binding_req, continue_map_binding, c);
 763                 return c;
 764                 }
 765
 766         case NCACN_NP:
 767         case NCACN_IP_TCP:
 768         case NCALRPC:
 769                 if (!s->binding->endpoint) {
 770                         struct composite_context *binding_req;
 771                         binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
 772                                                                   s->pipe->conn->event_ctx,
 773                                                                   s->lp_ctx);
 774                         composite_continue(c, binding_req, continue_map_binding, c);
 775                         return c;
 776                 }
 777
 778         default:
 779                 break;
 780         }
 781
 782         continue_connect(c, s);
 783         return c;
 784 }
 785
 786
 787 /*
 788   receive result of a request to open a rpc connection to a rpc pipe
 789 */
 790 NTSTATUS dcerpc_pipe_connect_b_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
 791                                     struct dcerpc_pipe **p)
 792 {
 793         NTSTATUS status;
 794         struct pipe_connect_state *s;
 795
 796         status = composite_wait(c);
 797
 798         if (NT_STATUS_IS_OK(status)) {
 799                 s = talloc_get_type(c->private_data, struct pipe_connect_state);
 800                 talloc_steal(mem_ctx, s->pipe);
 801                 *p = s->pipe;
 802         }
 803         talloc_free(c);
 804         return status;
 805 }
 806
 807
 808 /*
 809   open a rpc connection to a rpc pipe, using the specified
 810   binding structure to determine the endpoint and options - sync version
 811 */
 812 NTSTATUS dcerpc_pipe_connect_b(TALLOC_CTX *parent_ctx,
 813                                struct dcerpc_pipe **pp,
 814                                struct dcerpc_binding *binding,
 815                                const struct ndr_interface_table *table,
 816                                struct cli_credentials *credentials,
 817                                struct event_context *ev,
 818                                struct loadparm_context *lp_ctx)
 819 {
 820         struct composite_context *c;
 821
 822         c = dcerpc_pipe_connect_b_send(parent_ctx, binding, table,
 823                                        credentials, ev, lp_ctx);
 824         return dcerpc_pipe_connect_b_recv(c, parent_ctx, pp);
 825 }
 826
 827
 828 struct pipe_conn_state {
 829         struct dcerpc_pipe *pipe;
 830 };
 831
 832
 833 static void continue_pipe_connect_b(struct composite_context *ctx);
 834
 835
 836 /*
 837   Initiate rpc connection to a rpc pipe, using the specified string
 838   binding to determine the endpoint and options.
 839   The string is to be parsed to a binding structure first.
 840 */
 841 struct composite_context* dcerpc_pipe_connect_send(TALLOC_CTX *parent_ctx,
 842                                                    const char *binding,
 843                                                    const struct ndr_interface_table *table,
 844                                                    struct cli_credentials *credentials,
 845                                                    struct event_context *ev, struct loadparm_context *lp_ctx)
 846 {
 847         struct composite_context *c;
 848         struct pipe_conn_state *s;
 849         struct dcerpc_binding *b;
 850         struct composite_context *pipe_conn_req;
 851         struct event_context *new_ev = NULL;
 852
 853         if (ev == NULL) {
 854                 new_ev = event_context_init(parent_ctx);
 855                 if (new_ev == NULL) return NULL;
 856                 ev = new_ev;
 857         }
 858
 859         /* composite context allocation and setup */
 860         c = composite_create(parent_ctx, ev);
 861         if (c == NULL) {
 862                 talloc_free(new_ev);
 863                 return NULL;
 864         }
 865         talloc_steal(c, new_ev);
 866
 867         s = talloc_zero(c, struct pipe_conn_state);
 868         if (composite_nomem(s, c)) return c;
 869         c->private_data = s;
 870
 871         /* parse binding string to the structure */
 872         c->status = dcerpc_parse_binding(c, binding, &b);
 873         if (!NT_STATUS_IS_OK(c->status)) {
 874                 DEBUG(0, ("Failed to parse dcerpc binding '%s'\n", binding));
 875                 composite_error(c, c->status);
 876                 return c;
 877         }
 878
 879         DEBUG(3, ("Using binding %s\n", dcerpc_binding_string(c, b)));
 880
 881         /*
 882            start connecting to a rpc pipe after binding structure
 883            is established
 884          */
 885         pipe_conn_req = dcerpc_pipe_connect_b_send(c, b, table,
 886                                                    credentials, ev, lp_ctx);
 887         composite_continue(c, pipe_conn_req, continue_pipe_connect_b, c);
 888         return c;
 889 }
 890
 891
 892 /*
 893   Stage 2 of pipe_connect: Receive result of actual pipe connect request
 894   and say if we're done ok
 895 */
 896 static void continue_pipe_connect_b(struct composite_context *ctx)
 897 {
 898         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 899                                                       struct composite_context);
 900         struct pipe_conn_state *s = talloc_get_type(c->private_data,
 901                                                     struct pipe_conn_state);
 902
 903         c->status = dcerpc_pipe_connect_b_recv(ctx, c, &s->pipe);
 904         talloc_steal(s, s->pipe);
 905         if (!composite_is_ok(c)) return;
 906
 907         composite_done(c);
 908 }
 909
 910
 911 /*
 912   Receive result of pipe connect (using binding string) request
 913   and return connected pipe structure.
 914 */
 915 NTSTATUS dcerpc_pipe_connect_recv(struct composite_context *c,
 916                                   TALLOC_CTX *mem_ctx,
 917                                   struct dcerpc_pipe **pp)
 918 {
 919         NTSTATUS status;
 920         struct pipe_conn_state *s;
 921
 922         status = composite_wait(c);
 923         if (NT_STATUS_IS_OK(status)) {
 924                 s = talloc_get_type(c->private_data, struct pipe_conn_state);
 925                 *pp = talloc_steal(mem_ctx, s->pipe);
 926         }
 927         talloc_free(c);
 928         return status;
 929 }
 930
 931
 932 /*
 933   Open a rpc connection to a rpc pipe, using the specified string
 934   binding to determine the endpoint and options - sync version
 935 */
 936 NTSTATUS dcerpc_pipe_connect(TALLOC_CTX *parent_ctx,
 937                              struct dcerpc_pipe **pp,
 938                              const char *binding,
 939                              const struct ndr_interface_table *table,
 940                              struct cli_credentials *credentials,
 941                              struct event_context *ev,
 942                              struct loadparm_context *lp_ctx)
 943 {
 944         struct composite_context *c;
 945         c = dcerpc_pipe_connect_send(parent_ctx, binding,
 946                                      table, credentials, ev, lp_ctx);
 947         return dcerpc_pipe_connect_recv(c, parent_ctx, pp);
 948 }
 949