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         lp_smbcli_options(lp_ctx, &conn->in.options);
 123
 124         /*
 125          * provide proper credentials - user supplied, but allow a
 126          * fallback to anonymous if this is an schannel connection
 127          * (might be NT4 not allowing machine logins at session
 128          * setup).
 129          */
 130         s->conn.in.credentials = s->io.creds;
 131         if (s->io.binding->flags & DCERPC_SCHANNEL) {
 132                 conn->in.fallback_to_anonymous  = true;
 133         } else {
 134                 conn->in.fallback_to_anonymous  = false;
 135         }
 136
 137         /* send smb connect request */
 138         conn_req = smb_composite_connect_send(conn, s->io.pipe->conn,
 139                                               lp_resolve_context(lp_ctx),
 140                                               s->io.pipe->conn->event_ctx);
 141         if (composite_nomem(conn_req, c)) return c;
 142
 143         composite_continue(c, conn_req, continue_smb_connect, c);
 144         return c;
 145 }
 146
 147
 148 /*
 149   Receive result of a rpc connection to a rpc pipe on SMB
 150 */
 151 static NTSTATUS dcerpc_pipe_connect_ncacn_np_smb_recv(struct composite_context *c)
 152 {
 153         NTSTATUS status = composite_wait(c);
 154
 155         talloc_free(c);
 156         return status;
 157 }
 158
 159
 160 struct pipe_np_smb2_state {
 161         struct smb2_tree *tree;
 162         struct dcerpc_pipe_connect io;
 163 };
 164
 165
 166 /*
 167   Stage 3 of ncacn_np_smb: Named pipe opened (or not)
 168 */
 169 static void continue_pipe_open_smb2(struct composite_context *ctx)
 170 {
 171         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 172                                                       struct composite_context);
 173
 174         /* receive result of named pipe open request on smb2 */
 175         c->status = dcerpc_pipe_open_smb2_recv(ctx);
 176         if (!composite_is_ok(c)) return;
 177
 178         composite_done(c);
 179 }
 180
 181
 182 /*
 183   Stage 2 of ncacn_np_smb2: Open a named pipe after successful smb2 connection
 184 */
 185 static void continue_smb2_connect(struct composite_context *ctx)
 186 {
 187         struct composite_context *open_req;
 188         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 189                                                       struct composite_context);
 190         struct pipe_np_smb2_state *s = talloc_get_type(c->private_data,
 191                                                        struct pipe_np_smb2_state);
 192
 193         /* receive result of smb2 connect request */
 194         c->status = smb2_connect_recv(ctx, c, &s->tree);
 195         if (!composite_is_ok(c)) return;
 196
 197         /* prepare named pipe open parameters */
 198         s->io.pipe_name = s->io.binding->endpoint;
 199
 200         /* send named pipe open request */
 201         open_req = dcerpc_pipe_open_smb2_send(s->io.pipe, s->tree, s->io.pipe_name);
 202         if (composite_nomem(open_req, c)) return;
 203
 204         composite_continue(c, open_req, continue_pipe_open_smb2, c);
 205 }
 206
 207
 208 /*
 209    Initiate async open of a rpc connection request on SMB2 using
 210    the binding structure to determine the endpoint and options
 211 */
 212 static struct composite_context *dcerpc_pipe_connect_ncacn_np_smb2_send(
 213                                         TALLOC_CTX *mem_ctx,
 214                                         struct dcerpc_pipe_connect *io,
 215                                         struct loadparm_context *lp_ctx)
 216 {
 217         struct composite_context *c;
 218         struct pipe_np_smb2_state *s;
 219         struct composite_context *conn_req;
 220
 221         /* composite context allocation and setup */
 222         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 223         if (c == NULL) return NULL;
 224
 225         s = talloc_zero(c, struct pipe_np_smb2_state);
 226         if (composite_nomem(s, c)) return c;
 227         c->private_data = s;
 228
 229         s->io = *io;
 230
 231         /*
 232          * provide proper credentials - user supplied or anonymous in case this is
 233          * schannel connection
 234          */
 235         if (s->io.binding->flags & DCERPC_SCHANNEL) {
 236                 s->io.creds = cli_credentials_init(mem_ctx);
 237                 if (composite_nomem(s->io.creds, c)) return c;
 238
 239                 cli_credentials_guess(s->io.creds, lp_ctx);
 240         }
 241
 242         /* send smb2 connect request */
 243         conn_req = smb2_connect_send(mem_ctx, s->io.binding->host, "IPC$",
 244                                      s->io.resolve_ctx,
 245                                      s->io.creds,
 246                                      c->event_ctx);
 247         composite_continue(c, conn_req, continue_smb2_connect, c);
 248         return c;
 249 }
 250
 251
 252 /*
 253   Receive result of a rpc connection to a rpc pipe on SMB2
 254 */
 255 static NTSTATUS dcerpc_pipe_connect_ncacn_np_smb2_recv(struct composite_context *c)
 256 {
 257         NTSTATUS status = composite_wait(c);
 258
 259         talloc_free(c);
 260         return status;
 261 }
 262
 263
 264 struct pipe_ip_tcp_state {
 265         struct dcerpc_pipe_connect io;
 266         const char *host;
 267         const char *target_hostname;
 268         uint32_t port;
 269 };
 270
 271
 272 /*
 273   Stage 2 of ncacn_ip_tcp: rpc pipe opened (or not)
 274 */
 275 static void continue_pipe_open_ncacn_ip_tcp(struct composite_context *ctx)
 276 {
 277         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 278                                                       struct composite_context);
 279
 280         /* receive result of named pipe open request on tcp/ip */
 281         c->status = dcerpc_pipe_open_tcp_recv(ctx);
 282         if (!composite_is_ok(c)) return;
 283
 284         composite_done(c);
 285 }
 286
 287
 288 /*
 289   Initiate async open of a rpc connection to a rpc pipe on TCP/IP using
 290   the binding structure to determine the endpoint and options
 291 */
 292 static struct composite_context* dcerpc_pipe_connect_ncacn_ip_tcp_send(TALLOC_CTX *mem_ctx,
 293                                                                        struct dcerpc_pipe_connect *io)
 294 {
 295         struct composite_context *c;
 296         struct pipe_ip_tcp_state *s;
 297         struct composite_context *pipe_req;
 298
 299         /* composite context allocation and setup */
 300         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 301         if (c == NULL) return NULL;
 302
 303         s = talloc_zero(c, struct pipe_ip_tcp_state);
 304         if (composite_nomem(s, c)) return c;
 305         c->private_data = s;
 306
 307         /* store input parameters in state structure */
 308         s->io               = *io;
 309         s->host             = talloc_reference(c, io->binding->host);
 310         s->target_hostname  = talloc_reference(c, io->binding->target_hostname);
 311                              /* port number is a binding endpoint here */
 312         s->port             = atoi(io->binding->endpoint);
 313
 314         /* send pipe open request on tcp/ip */
 315         pipe_req = dcerpc_pipe_open_tcp_send(s->io.pipe->conn, s->host, s->target_hostname,
 316                                              s->port, io->resolve_ctx);
 317         composite_continue(c, pipe_req, continue_pipe_open_ncacn_ip_tcp, c);
 318         return c;
 319 }
 320
 321
 322 /*
 323   Receive result of a rpc connection to a rpc pipe on TCP/IP
 324 */
 325 static NTSTATUS dcerpc_pipe_connect_ncacn_ip_tcp_recv(struct composite_context *c)
 326 {
 327         NTSTATUS status = composite_wait(c);
 328
 329         talloc_free(c);
 330         return status;
 331 }
 332
 333
 334 struct pipe_unix_state {
 335         struct dcerpc_pipe_connect io;
 336         const char *path;
 337 };
 338
 339
 340 /*
 341   Stage 2 of ncacn_unix: rpc pipe opened (or not)
 342 */
 343 static void continue_pipe_open_ncacn_unix_stream(struct composite_context *ctx)
 344 {
 345         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 346                                                       struct composite_context);
 347
 348         /* receive result of pipe open request on unix socket */
 349         c->status = dcerpc_pipe_open_unix_stream_recv(ctx);
 350         if (!composite_is_ok(c)) return;
 351
 352         composite_done(c);
 353 }
 354
 355
 356 /*
 357   Initiate async open of a rpc connection to a rpc pipe on unix socket using
 358   the binding structure to determine the endpoint and options
 359 */
 360 static struct composite_context* dcerpc_pipe_connect_ncacn_unix_stream_send(TALLOC_CTX *mem_ctx,
 361                                                                             struct dcerpc_pipe_connect *io)
 362 {
 363         struct composite_context *c;
 364         struct pipe_unix_state *s;
 365         struct composite_context *pipe_req;
 366
 367         /* composite context allocation and setup */
 368         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 369         if (c == NULL) return NULL;
 370
 371         s = talloc_zero(c, struct pipe_unix_state);
 372         if (composite_nomem(s, c)) return c;
 373         c->private_data = s;
 374
 375         /* prepare pipe open parameters and store them in state structure
 376            also, verify whether biding endpoint is not null */
 377         s->io = *io;
 378
 379         if (!io->binding->endpoint) {
 380                 DEBUG(0, ("Path to unix socket not specified\n"));
 381                 composite_error(c, NT_STATUS_INVALID_PARAMETER);
 382                 return c;
 383         }
 384
 385         s->path  = talloc_strdup(c, io->binding->endpoint);  /* path is a binding endpoint here */
 386         if (composite_nomem(s->path, c)) return c;
 387
 388         /* send pipe open request on unix socket */
 389         pipe_req = dcerpc_pipe_open_unix_stream_send(s->io.pipe->conn, s->path);
 390         composite_continue(c, pipe_req, continue_pipe_open_ncacn_unix_stream, c);
 391         return c;
 392 }
 393
 394
 395 /*
 396   Receive result of a rpc connection to a pipe on unix socket
 397 */
 398 static NTSTATUS dcerpc_pipe_connect_ncacn_unix_stream_recv(struct composite_context *c)
 399 {
 400         NTSTATUS status = composite_wait(c);
 401
 402         talloc_free(c);
 403         return status;
 404 }
 405
 406
 407 struct pipe_ncalrpc_state {
 408         struct dcerpc_pipe_connect io;
 409 };
 410
 411 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c);
 412
 413 /*
 414   Stage 2 of ncalrpc: rpc pipe opened (or not)
 415 */
 416 static void continue_pipe_open_ncalrpc(struct composite_context *ctx)
 417 {
 418         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 419                                                       struct composite_context);
 420
 421         /* receive result of pipe open request on ncalrpc */
 422         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 423         if (!composite_is_ok(c)) return;
 424
 425         composite_done(c);
 426 }
 427
 428
 429 /*
 430    Initiate async open of a rpc connection request on NCALRPC using
 431    the binding structure to determine the endpoint and options
 432 */
 433 static struct composite_context* dcerpc_pipe_connect_ncalrpc_send(TALLOC_CTX *mem_ctx,
 434                                                                   struct dcerpc_pipe_connect *io, struct loadparm_context *lp_ctx)
 435 {
 436         struct composite_context *c;
 437         struct pipe_ncalrpc_state *s;
 438         struct composite_context *pipe_req;
 439
 440         /* composite context allocation and setup */
 441         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 442         if (c == NULL) return NULL;
 443
 444         s = talloc_zero(c, struct pipe_ncalrpc_state);
 445         if (composite_nomem(s, c)) return c;
 446         c->private_data = s;
 447
 448         /* store input parameters in state structure */
 449         s->io  = *io;
 450
 451         /* send pipe open request */
 452         pipe_req = dcerpc_pipe_open_pipe_send(s->io.pipe->conn, lp_ncalrpc_dir(lp_ctx),
 453                                               s->io.binding->endpoint);
 454         composite_continue(c, pipe_req, continue_pipe_open_ncalrpc, c);
 455         return c;
 456 }
 457
 458
 459 /*
 460   Receive result of a rpc connection to a rpc pipe on NCALRPC
 461 */
 462 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c)
 463 {
 464         NTSTATUS status = composite_wait(c);
 465
 466         talloc_free(c);
 467         return status;
 468 }
 469
 470
 471 struct pipe_connect_state {
 472         struct dcerpc_pipe *pipe;
 473         struct dcerpc_binding *binding;
 474         const struct ndr_interface_table *table;
 475         struct cli_credentials *credentials;
 476         struct loadparm_context *lp_ctx;
 477 };
 478
 479
 480 static void continue_map_binding(struct composite_context *ctx);
 481 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s);
 482 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx);
 483 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx);
 484 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx);
 485 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx);
 486 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx);
 487 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s);
 488 static void continue_pipe_auth(struct composite_context *ctx);
 489
 490
 491 /*
 492   Stage 2 of pipe_connect_b: Receive result of endpoint mapping
 493 */
 494 static void continue_map_binding(struct composite_context *ctx)
 495 {
 496         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 497                                                       struct composite_context);
 498         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 499                                                        struct pipe_connect_state);
 500
 501         c->status = dcerpc_epm_map_binding_recv(ctx);
 502         if (!composite_is_ok(c)) return;
 503
 504         DEBUG(2,("Mapped to DCERPC endpoint %s\n", s->binding->endpoint));
 505
 506         continue_connect(c, s);
 507 }
 508
 509
 510 /*
 511   Stage 2 of pipe_connect_b: Continue connection after endpoint is known
 512 */
 513 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s)
 514 {
 515         struct dcerpc_pipe_connect pc;
 516
 517         /* potential exits to another stage by sending an async request */
 518         struct composite_context *ncacn_np_smb2_req;
 519         struct composite_context *ncacn_np_smb_req;
 520         struct composite_context *ncacn_ip_tcp_req;
 521         struct composite_context *ncacn_unix_req;
 522         struct composite_context *ncalrpc_req;
 523
 524         /* dcerpc pipe connect input parameters */
 525         pc.pipe         = s->pipe;
 526         pc.binding      = s->binding;
 527         pc.interface    = s->table;
 528         pc.creds        = s->credentials;
 529         pc.resolve_ctx  = lp_resolve_context(s->lp_ctx);
 530
 531         /* connect dcerpc pipe depending on required transport */
 532         switch (s->binding->transport) {
 533         case NCACN_NP:
 534                 if (pc.binding->flags & DCERPC_SMB2) {
 535                         /* new varient of SMB a.k.a. SMB2 */
 536                         ncacn_np_smb2_req = dcerpc_pipe_connect_ncacn_np_smb2_send(c, &pc, s->lp_ctx);
 537                         composite_continue(c, ncacn_np_smb2_req, continue_pipe_connect_ncacn_np_smb2, c);
 538                         return;
 539
 540                 } else {
 541                         /* good old ordinary SMB */
 542                         ncacn_np_smb_req = dcerpc_pipe_connect_ncacn_np_smb_send(c, &pc, s->lp_ctx);
 543                         composite_continue(c, ncacn_np_smb_req, continue_pipe_connect_ncacn_np_smb, c);
 544                         return;
 545                 }
 546                 break;
 547
 548         case NCACN_IP_TCP:
 549                 ncacn_ip_tcp_req = dcerpc_pipe_connect_ncacn_ip_tcp_send(c, &pc);
 550                 composite_continue(c, ncacn_ip_tcp_req, continue_pipe_connect_ncacn_ip_tcp, c);
 551                 return;
 552
 553         case NCACN_UNIX_STREAM:
 554                 ncacn_unix_req = dcerpc_pipe_connect_ncacn_unix_stream_send(c, &pc);
 555                 composite_continue(c, ncacn_unix_req, continue_pipe_connect_ncacn_unix, c);
 556                 return;
 557
 558         case NCALRPC:
 559                 ncalrpc_req = dcerpc_pipe_connect_ncalrpc_send(c, &pc, s->lp_ctx);
 560                 composite_continue(c, ncalrpc_req, continue_pipe_connect_ncalrpc, c);
 561                 return;
 562
 563         default:
 564                 /* looks like a transport we don't support now */
 565                 composite_error(c, NT_STATUS_NOT_SUPPORTED);
 566         }
 567 }
 568
 569
 570 /*
 571   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 572   named pipe on smb2
 573 */
 574 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx)
 575 {
 576         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 577                                                       struct composite_context);
 578         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 579                                                        struct pipe_connect_state);
 580
 581         c->status = dcerpc_pipe_connect_ncacn_np_smb2_recv(ctx);
 582         if (!composite_is_ok(c)) return;
 583
 584         continue_pipe_connect(c, s);
 585 }
 586
 587
 588 /*
 589   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 590   named pipe on smb
 591 */
 592 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx)
 593 {
 594         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 595                                                       struct composite_context);
 596         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 597                                                        struct pipe_connect_state);
 598
 599         c->status = dcerpc_pipe_connect_ncacn_np_smb_recv(ctx);
 600         if (!composite_is_ok(c)) return;
 601
 602         continue_pipe_connect(c, s);
 603 }
 604
 605
 606 /*
 607   Stage 3 of pipe_connect_b: Receive result of pipe connect request on tcp/ip
 608 */
 609 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx)
 610 {
 611         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 612                                                       struct composite_context);
 613         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 614                                                        struct pipe_connect_state);
 615
 616         c->status = dcerpc_pipe_connect_ncacn_ip_tcp_recv(ctx);
 617         if (!composite_is_ok(c)) return;
 618
 619         continue_pipe_connect(c, s);
 620 }
 621
 622
 623 /*
 624   Stage 3 of pipe_connect_b: Receive result of pipe connect request on unix socket
 625 */
 626 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx)
 627 {
 628         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 629                                                       struct composite_context);
 630         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 631                                                        struct pipe_connect_state);
 632
 633         c->status = dcerpc_pipe_connect_ncacn_unix_stream_recv(ctx);
 634         if (!composite_is_ok(c)) return;
 635
 636         continue_pipe_connect(c, s);
 637 }
 638
 639
 640 /*
 641   Stage 3 of pipe_connect_b: Receive result of pipe connect request on local rpc
 642 */
 643 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx)
 644 {
 645         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 646                                                       struct composite_context);
 647         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 648                                                        struct pipe_connect_state);
 649
 650         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 651         if (!composite_is_ok(c)) return;
 652
 653         continue_pipe_connect(c, s);
 654 }
 655
 656
 657 /*
 658   Stage 4 of pipe_connect_b: Start an authentication on connected dcerpc pipe
 659   depending on credentials and binding flags passed.
 660 */
 661 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s)
 662 {
 663         struct composite_context *auth_bind_req;
 664
 665         s->pipe->binding = s->binding;
 666         if (!talloc_reference(s->pipe, s->binding)) {
 667                 composite_error(c, NT_STATUS_NO_MEMORY);
 668                 return;
 669         }
 670
 671         auth_bind_req = dcerpc_pipe_auth_send(s->pipe, s->binding, s->table,
 672                                               s->credentials, s->lp_ctx);
 673         composite_continue(c, auth_bind_req, continue_pipe_auth, c);
 674 }
 675
 676
 677 /*
 678   Stage 5 of pipe_connect_b: Receive result of pipe authentication request
 679   and say if all went ok
 680 */
 681 static void continue_pipe_auth(struct composite_context *ctx)
 682 {
 683         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 684                                                       struct composite_context);
 685         struct pipe_connect_state *s = talloc_get_type(c->private_data, struct pipe_connect_state);
 686
 687         c->status = dcerpc_pipe_auth_recv(ctx, s, &s->pipe);
 688         if (!composite_is_ok(c)) return;
 689
 690         composite_done(c);
 691 }
 692
 693
 694 /*
 695   handle timeouts of a dcerpc connect
 696 */
 697 static void dcerpc_connect_timeout_handler(struct event_context *ev, struct timed_event *te,
 698                                            struct timeval t, void *private)
 699 {
 700         struct composite_context *c = talloc_get_type(private, struct composite_context);
 701         composite_error(c, NT_STATUS_IO_TIMEOUT);
 702 }
 703
 704 /*
 705   start a request to open a rpc connection to a rpc pipe, using
 706   specified binding structure to determine the endpoint and options
 707 */
 708 struct composite_context* dcerpc_pipe_connect_b_send(TALLOC_CTX *parent_ctx,
 709                                                      struct dcerpc_binding *binding,
 710                                                      const struct ndr_interface_table *table,
 711                                                      struct cli_credentials *credentials,
 712                                                      struct event_context *ev,
 713                                                      struct loadparm_context *lp_ctx)
 714 {
 715         struct composite_context *c;
 716         struct pipe_connect_state *s;
 717         struct event_context *new_ev = NULL;
 718
 719         if (ev == NULL) {
 720                 new_ev = event_context_init(parent_ctx);
 721                 if (new_ev == NULL) return NULL;
 722                 ev = new_ev;
 723         }
 724
 725         /* composite context allocation and setup */
 726         c = composite_create(parent_ctx, ev);
 727         if (c == NULL) {
 728                 talloc_free(new_ev);
 729                 return NULL;
 730         }
 731         talloc_steal(c, new_ev);
 732
 733         s = talloc_zero(c, struct pipe_connect_state);
 734         if (composite_nomem(s, c)) return c;
 735         c->private_data = s;
 736
 737         /* initialise dcerpc pipe structure */
 738         s->pipe = dcerpc_pipe_init(c, ev, lp_iconv_convenience(lp_ctx));
 739         if (composite_nomem(s->pipe, c)) return c;
 740
 741         /* store parameters in state structure */
 742         s->binding      = binding;
 743         s->table        = table;
 744         s->credentials  = credentials;
 745         s->lp_ctx       = lp_ctx;
 746
 747         event_add_timed(c->event_ctx, c,
 748                         timeval_current_ofs(DCERPC_REQUEST_TIMEOUT, 0),
 749                         dcerpc_connect_timeout_handler, c);
 750
 751         switch (s->binding->transport) {
 752         case NCA_UNKNOWN: {
 753                 struct composite_context *binding_req;
 754                 binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
 755                                                           s->pipe->conn->event_ctx,
 756                                                           s->lp_ctx);
 757                 composite_continue(c, binding_req, continue_map_binding, c);
 758                 return c;
 759                 }
 760
 761         case NCACN_NP:
 762         case NCACN_IP_TCP:
 763         case NCALRPC:
 764                 if (!s->binding->endpoint) {
 765                         struct composite_context *binding_req;
 766                         binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
 767                                                                   s->pipe->conn->event_ctx,
 768                                                                   s->lp_ctx);
 769                         composite_continue(c, binding_req, continue_map_binding, c);
 770                         return c;
 771                 }
 772
 773         default:
 774                 break;
 775         }
 776
 777         continue_connect(c, s);
 778         return c;
 779 }
 780
 781
 782 /*
 783   receive result of a request to open a rpc connection to a rpc pipe
 784 */
 785 NTSTATUS dcerpc_pipe_connect_b_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
 786                                     struct dcerpc_pipe **p)
 787 {
 788         NTSTATUS status;
 789         struct pipe_connect_state *s;
 790
 791         status = composite_wait(c);
 792
 793         if (NT_STATUS_IS_OK(status)) {
 794                 s = talloc_get_type(c->private_data, struct pipe_connect_state);
 795                 talloc_steal(mem_ctx, s->pipe);
 796                 *p = s->pipe;
 797         }
 798         talloc_free(c);
 799         return status;
 800 }
 801
 802
 803 /*
 804   open a rpc connection to a rpc pipe, using the specified
 805   binding structure to determine the endpoint and options - sync version
 806 */
 807 NTSTATUS dcerpc_pipe_connect_b(TALLOC_CTX *parent_ctx,
 808                                struct dcerpc_pipe **pp,
 809                                struct dcerpc_binding *binding,
 810                                const struct ndr_interface_table *table,
 811                                struct cli_credentials *credentials,
 812                                struct event_context *ev,
 813                                struct loadparm_context *lp_ctx)
 814 {
 815         struct composite_context *c;
 816
 817         c = dcerpc_pipe_connect_b_send(parent_ctx, binding, table,
 818                                        credentials, ev, lp_ctx);
 819         return dcerpc_pipe_connect_b_recv(c, parent_ctx, pp);
 820 }
 821
 822
 823 struct pipe_conn_state {
 824         struct dcerpc_pipe *pipe;
 825 };
 826
 827
 828 static void continue_pipe_connect_b(struct composite_context *ctx);
 829
 830
 831 /*
 832   Initiate rpc connection to a rpc pipe, using the specified string
 833   binding to determine the endpoint and options.
 834   The string is to be parsed to a binding structure first.
 835 */
 836 struct composite_context* dcerpc_pipe_connect_send(TALLOC_CTX *parent_ctx,
 837                                                    const char *binding,
 838                                                    const struct ndr_interface_table *table,
 839                                                    struct cli_credentials *credentials,
 840                                                    struct event_context *ev, struct loadparm_context *lp_ctx)
 841 {
 842         struct composite_context *c;
 843         struct pipe_conn_state *s;
 844         struct dcerpc_binding *b;
 845         struct composite_context *pipe_conn_req;
 846         struct event_context *new_ev = NULL;
 847
 848         if (ev == NULL) {
 849                 new_ev = event_context_init(parent_ctx);
 850                 if (new_ev == NULL) return NULL;
 851                 ev = new_ev;
 852         }
 853
 854         /* composite context allocation and setup */
 855         c = composite_create(parent_ctx, ev);
 856         if (c == NULL) {
 857                 talloc_free(new_ev);
 858                 return NULL;
 859         }
 860         talloc_steal(c, new_ev);
 861
 862         s = talloc_zero(c, struct pipe_conn_state);
 863         if (composite_nomem(s, c)) return c;
 864         c->private_data = s;
 865
 866         /* parse binding string to the structure */
 867         c->status = dcerpc_parse_binding(c, binding, &b);
 868         if (!NT_STATUS_IS_OK(c->status)) {
 869                 DEBUG(0, ("Failed to parse dcerpc binding '%s'\n", binding));
 870                 composite_error(c, c->status);
 871                 return c;
 872         }
 873
 874         DEBUG(3, ("Using binding %s\n", dcerpc_binding_string(c, b)));
 875
 876         /*
 877            start connecting to a rpc pipe after binding structure
 878            is established
 879          */
 880         pipe_conn_req = dcerpc_pipe_connect_b_send(c, b, table,
 881                                                    credentials, ev, lp_ctx);
 882         composite_continue(c, pipe_conn_req, continue_pipe_connect_b, c);
 883         return c;
 884 }
 885
 886
 887 /*
 888   Stage 2 of pipe_connect: Receive result of actual pipe connect request
 889   and say if we're done ok
 890 */
 891 static void continue_pipe_connect_b(struct composite_context *ctx)
 892 {
 893         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 894                                                       struct composite_context);
 895         struct pipe_conn_state *s = talloc_get_type(c->private_data,
 896                                                     struct pipe_conn_state);
 897
 898         c->status = dcerpc_pipe_connect_b_recv(ctx, c, &s->pipe);
 899         talloc_steal(s, s->pipe);
 900         if (!composite_is_ok(c)) return;
 901
 902         composite_done(c);
 903 }
 904
 905
 906 /*
 907   Receive result of pipe connect (using binding string) request
 908   and return connected pipe structure.
 909 */
 910 NTSTATUS dcerpc_pipe_connect_recv(struct composite_context *c,
 911                                   TALLOC_CTX *mem_ctx,
 912                                   struct dcerpc_pipe **pp)
 913 {
 914         NTSTATUS status;
 915         struct pipe_conn_state *s;
 916
 917         status = composite_wait(c);
 918         if (NT_STATUS_IS_OK(status)) {
 919                 s = talloc_get_type(c->private_data, struct pipe_conn_state);
 920                 *pp = talloc_steal(mem_ctx, s->pipe);
 921         }
 922         talloc_free(c);
 923         return status;
 924 }
 925
 926
 927 /*
 928   Open a rpc connection to a rpc pipe, using the specified string
 929   binding to determine the endpoint and options - sync version
 930 */
 931 NTSTATUS dcerpc_pipe_connect(TALLOC_CTX *parent_ctx,
 932                              struct dcerpc_pipe **pp,
 933                              const char *binding,
 934                              const struct ndr_interface_table *table,
 935                              struct cli_credentials *credentials,
 936                              struct event_context *ev,
 937                              struct loadparm_context *lp_ctx)
 938 {
 939         struct composite_context *c;
 940         c = dcerpc_pipe_connect_send(parent_ctx, binding,
 941                                      table, credentials, ev, lp_ctx);
 942         return dcerpc_pipe_connect_recv(c, parent_ctx, pp);
 943 }
 944