source4/librpc/rpc/dcerpc_connect.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    dcerpc connect functions
   5
   6    Copyright (C) Andrew Tridgell 2003
   7    Copyright (C) Jelmer Vernooij 2004
   8    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005-2007
   9    Copyright (C) Rafal Szczesniak  2005
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25
  26 #include "includes.h"
  27 #include "libcli/composite/composite.h"
  28 #include "libcli/smb_composite/smb_composite.h"
  29 #include "lib/events/events.h"
  30 #include "libcli/smb2/smb2.h"
  31 #include "libcli/smb2/smb2_calls.h"
  32 #include "librpc/rpc/dcerpc.h"
  33 #include "librpc/rpc/dcerpc_proto.h"
  34 #include "auth/credentials/credentials.h"
  35 #include "param/param.h"
  36 #include "libcli/resolve/resolve.h"
  37
  38
  39 struct pipe_np_smb_state {
  40         struct smb_composite_connect conn;
  41         struct smbcli_tree *tree;
  42         struct dcerpc_pipe_connect io;
  43 };
  44
  45
  46 /*
  47   Stage 3 of ncacn_np_smb: Named pipe opened (or not)
  48 */
  49 static void continue_pipe_open_smb(struct composite_context *ctx)
  50 {
  51         struct composite_context *c = talloc_get_type(ctx->async.private_data,
  52                                                       struct composite_context);
  53
  54         /* receive result of named pipe open request on smb */
  55         c->status = dcerpc_pipe_open_smb_recv(ctx);
  56         if (!composite_is_ok(c)) return;
  57
  58         composite_done(c);
  59 }
  60
  61
  62 /*
  63   Stage 2 of ncacn_np_smb: Open a named pipe after successful smb connection
  64 */
  65 static void continue_smb_connect(struct composite_context *ctx)
  66 {
  67         struct composite_context *open_ctx;
  68         struct composite_context *c = talloc_get_type(ctx->async.private_data,
  69                                                       struct composite_context);
  70         struct pipe_np_smb_state *s = talloc_get_type(c->private_data,
  71                                                       struct pipe_np_smb_state);
  72
  73         /* receive result of smb connect request */
  74         c->status = smb_composite_connect_recv(ctx, c);
  75         if (!composite_is_ok(c)) return;
  76
  77         /* prepare named pipe open parameters */
  78         s->tree         = s->conn.out.tree;
  79         s->io.pipe_name = s->io.binding->endpoint;
  80
  81         /* send named pipe open request */
  82         open_ctx = dcerpc_pipe_open_smb_send(s->io.pipe, s->tree, s->io.pipe_name);
  83         if (composite_nomem(open_ctx, c)) return;
  84
  85         composite_continue(c, open_ctx, continue_pipe_open_smb, c);
  86 }
  87
  88
  89 /*
  90   Initiate async open of a rpc connection to a rpc pipe on SMB using
  91   the binding structure to determine the endpoint and options
  92 */
  93 static struct composite_context *dcerpc_pipe_connect_ncacn_np_smb_send(TALLOC_CTX *mem_ctx, struct dcerpc_pipe_connect *io, struct loadparm_context *lp_ctx)
  94 {
  95         struct composite_context *c;
  96         struct pipe_np_smb_state *s;
  97         struct composite_context *conn_req;
  98         struct smb_composite_connect *conn;
  99
 100         /* composite context allocation and setup */
 101         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 102         if (c == NULL) return NULL;
 103
 104         s = talloc_zero(c, struct pipe_np_smb_state);
 105         if (composite_nomem(s, c)) return c;
 106         c->private_data = s;
 107
 108         s->io  = *io;
 109         conn   = &s->conn;
 110
 111         /* prepare smb connection parameters: we're connecting to IPC$ share on
 112            remote rpc server */
 113         conn->in.dest_host              = s->io.binding->host;
 114         conn->in.dest_ports                  = lpcfg_smb_ports(lp_ctx);
 115         if (s->io.binding->target_hostname == NULL)
 116                 conn->in.called_name = "*SMBSERVER"; /* FIXME: This is invalid */
 117         else
 118                 conn->in.called_name            = s->io.binding->target_hostname;
 119         conn->in.socket_options         = lpcfg_socket_options(lp_ctx);
 120         conn->in.service                = "IPC$";
 121         conn->in.service_type           = NULL;
 122         conn->in.workgroup              = lpcfg_workgroup(lp_ctx);
 123         conn->in.gensec_settings = lpcfg_gensec_settings(conn, lp_ctx);
 124
 125         lpcfg_smbcli_options(lp_ctx, &conn->in.options);
 126         lpcfg_smbcli_session_options(lp_ctx, &conn->in.session_options);
 127
 128         /*
 129          * provide proper credentials - user supplied, but allow a
 130          * fallback to anonymous if this is an schannel connection
 131          * (might be NT4 not allowing machine logins at session
 132          * setup) or if asked to do so by the caller (perhaps a SAMR password change?)
 133          */
 134         s->conn.in.credentials = s->io.creds;
 135         if (s->io.binding->flags & (DCERPC_SCHANNEL|DCERPC_ANON_FALLBACK)) {
 136                 conn->in.fallback_to_anonymous  = true;
 137         } else {
 138                 conn->in.fallback_to_anonymous  = false;
 139         }
 140
 141         /* send smb connect request */
 142         conn_req = smb_composite_connect_send(conn, s->io.pipe->conn,
 143                                               s->io.resolve_ctx,
 144                                               s->io.pipe->conn->event_ctx);
 145         if (composite_nomem(conn_req, c)) return c;
 146
 147         composite_continue(c, conn_req, continue_smb_connect, c);
 148         return c;
 149 }
 150
 151
 152 /*
 153   Receive result of a rpc connection to a rpc pipe on SMB
 154 */
 155 static NTSTATUS dcerpc_pipe_connect_ncacn_np_smb_recv(struct composite_context *c)
 156 {
 157         NTSTATUS status = composite_wait(c);
 158
 159         talloc_free(c);
 160         return status;
 161 }
 162
 163
 164 struct pipe_np_smb2_state {
 165         struct smb2_tree *tree;
 166         struct dcerpc_pipe_connect io;
 167 };
 168
 169
 170 /*
 171   Stage 3 of ncacn_np_smb: Named pipe opened (or not)
 172 */
 173 static void continue_pipe_open_smb2(struct composite_context *ctx)
 174 {
 175         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 176                                                       struct composite_context);
 177
 178         /* receive result of named pipe open request on smb2 */
 179         c->status = dcerpc_pipe_open_smb2_recv(ctx);
 180         if (!composite_is_ok(c)) return;
 181
 182         composite_done(c);
 183 }
 184
 185
 186 /*
 187   Stage 2 of ncacn_np_smb2: Open a named pipe after successful smb2 connection
 188 */
 189 static void continue_smb2_connect(struct composite_context *ctx)
 190 {
 191         struct composite_context *open_req;
 192         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 193                                                       struct composite_context);
 194         struct pipe_np_smb2_state *s = talloc_get_type(c->private_data,
 195                                                        struct pipe_np_smb2_state);
 196
 197         /* receive result of smb2 connect request */
 198         c->status = smb2_connect_recv(ctx, c, &s->tree);
 199         if (!composite_is_ok(c)) return;
 200
 201         /* prepare named pipe open parameters */
 202         s->io.pipe_name = s->io.binding->endpoint;
 203
 204         /* send named pipe open request */
 205         open_req = dcerpc_pipe_open_smb2_send(s->io.pipe, s->tree, s->io.pipe_name);
 206         if (composite_nomem(open_req, c)) return;
 207
 208         composite_continue(c, open_req, continue_pipe_open_smb2, c);
 209 }
 210
 211
 212 /*
 213    Initiate async open of a rpc connection request on SMB2 using
 214    the binding structure to determine the endpoint and options
 215 */
 216 static struct composite_context *dcerpc_pipe_connect_ncacn_np_smb2_send(
 217                                         TALLOC_CTX *mem_ctx,
 218                                         struct dcerpc_pipe_connect *io,
 219                                         struct loadparm_context *lp_ctx)
 220 {
 221         struct composite_context *c;
 222         struct pipe_np_smb2_state *s;
 223         struct composite_context *conn_req;
 224         struct smbcli_options options;
 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         lpcfg_smbcli_options(lp_ctx, &options);
 248
 249         /* send smb2 connect request */
 250         conn_req = smb2_connect_send(mem_ctx, s->io.binding->host,
 251                         lpcfg_parm_string_list(mem_ctx, lp_ctx, NULL, "smb2", "ports", NULL),
 252                                         "IPC$",
 253                                      s->io.resolve_ctx,
 254                                      s->io.creds,
 255                                      c->event_ctx,
 256                                      &options,
 257                                          lpcfg_socket_options(lp_ctx),
 258                                          lpcfg_gensec_settings(mem_ctx, lp_ctx)
 259                                          );
 260         composite_continue(c, conn_req, continue_smb2_connect, c);
 261         return c;
 262 }
 263
 264
 265 /*
 266   Receive result of a rpc connection to a rpc pipe on SMB2
 267 */
 268 static NTSTATUS dcerpc_pipe_connect_ncacn_np_smb2_recv(struct composite_context *c)
 269 {
 270         NTSTATUS status = composite_wait(c);
 271
 272         talloc_free(c);
 273         return status;
 274 }
 275
 276
 277 struct pipe_ip_tcp_state {
 278         struct dcerpc_pipe_connect io;
 279         const char *localaddr;
 280         const char *host;
 281         const char *target_hostname;
 282         uint32_t port;
 283 };
 284
 285
 286 /*
 287   Stage 2 of ncacn_ip_tcp: rpc pipe opened (or not)
 288 */
 289 static void continue_pipe_open_ncacn_ip_tcp(struct composite_context *ctx)
 290 {
 291         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 292                                                       struct composite_context);
 293
 294         /* receive result of named pipe open request on tcp/ip */
 295         c->status = dcerpc_pipe_open_tcp_recv(ctx);
 296         if (!composite_is_ok(c)) return;
 297
 298         composite_done(c);
 299 }
 300
 301
 302 /*
 303   Initiate async open of a rpc connection to a rpc pipe on TCP/IP using
 304   the binding structure to determine the endpoint and options
 305 */
 306 static struct composite_context* dcerpc_pipe_connect_ncacn_ip_tcp_send(TALLOC_CTX *mem_ctx,
 307                                                                        struct dcerpc_pipe_connect *io)
 308 {
 309         struct composite_context *c;
 310         struct pipe_ip_tcp_state *s;
 311         struct composite_context *pipe_req;
 312
 313         /* composite context allocation and setup */
 314         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 315         if (c == NULL) return NULL;
 316
 317         s = talloc_zero(c, struct pipe_ip_tcp_state);
 318         if (composite_nomem(s, c)) return c;
 319         c->private_data = s;
 320
 321         /* store input parameters in state structure */
 322         s->io               = *io;
 323         s->localaddr        = talloc_reference(c, io->binding->localaddress);
 324         s->host             = talloc_reference(c, io->binding->host);
 325         s->target_hostname  = talloc_reference(c, io->binding->target_hostname);
 326                              /* port number is a binding endpoint here */
 327         s->port             = atoi(io->binding->endpoint);
 328
 329         /* send pipe open request on tcp/ip */
 330         pipe_req = dcerpc_pipe_open_tcp_send(s->io.pipe->conn, s->localaddr, s->host, s->target_hostname,
 331                                              s->port, io->resolve_ctx);
 332         composite_continue(c, pipe_req, continue_pipe_open_ncacn_ip_tcp, c);
 333         return c;
 334 }
 335
 336
 337 /*
 338   Receive result of a rpc connection to a rpc pipe on TCP/IP
 339 */
 340 static NTSTATUS dcerpc_pipe_connect_ncacn_ip_tcp_recv(struct composite_context *c)
 341 {
 342         NTSTATUS status = composite_wait(c);
 343
 344         talloc_free(c);
 345         return status;
 346 }
 347
 348
 349 struct pipe_unix_state {
 350         struct dcerpc_pipe_connect io;
 351         const char *path;
 352 };
 353
 354
 355 /*
 356   Stage 2 of ncacn_unix: rpc pipe opened (or not)
 357 */
 358 static void continue_pipe_open_ncacn_unix_stream(struct composite_context *ctx)
 359 {
 360         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 361                                                       struct composite_context);
 362
 363         /* receive result of pipe open request on unix socket */
 364         c->status = dcerpc_pipe_open_unix_stream_recv(ctx);
 365         if (!composite_is_ok(c)) return;
 366
 367         composite_done(c);
 368 }
 369
 370
 371 /*
 372   Initiate async open of a rpc connection to a rpc pipe on unix socket using
 373   the binding structure to determine the endpoint and options
 374 */
 375 static struct composite_context* dcerpc_pipe_connect_ncacn_unix_stream_send(TALLOC_CTX *mem_ctx,
 376                                                                             struct dcerpc_pipe_connect *io)
 377 {
 378         struct composite_context *c;
 379         struct pipe_unix_state *s;
 380         struct composite_context *pipe_req;
 381
 382         /* composite context allocation and setup */
 383         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 384         if (c == NULL) return NULL;
 385
 386         s = talloc_zero(c, struct pipe_unix_state);
 387         if (composite_nomem(s, c)) return c;
 388         c->private_data = s;
 389
 390         /* prepare pipe open parameters and store them in state structure
 391            also, verify whether biding endpoint is not null */
 392         s->io = *io;
 393
 394         if (!io->binding->endpoint) {
 395                 DEBUG(0, ("Path to unix socket not specified\n"));
 396                 composite_error(c, NT_STATUS_INVALID_PARAMETER);
 397                 return c;
 398         }
 399
 400         s->path  = talloc_strdup(c, io->binding->endpoint);  /* path is a binding endpoint here */
 401         if (composite_nomem(s->path, c)) return c;
 402
 403         /* send pipe open request on unix socket */
 404         pipe_req = dcerpc_pipe_open_unix_stream_send(s->io.pipe->conn, s->path);
 405         composite_continue(c, pipe_req, continue_pipe_open_ncacn_unix_stream, c);
 406         return c;
 407 }
 408
 409
 410 /*
 411   Receive result of a rpc connection to a pipe on unix socket
 412 */
 413 static NTSTATUS dcerpc_pipe_connect_ncacn_unix_stream_recv(struct composite_context *c)
 414 {
 415         NTSTATUS status = composite_wait(c);
 416
 417         talloc_free(c);
 418         return status;
 419 }
 420
 421
 422 struct pipe_ncalrpc_state {
 423         struct dcerpc_pipe_connect io;
 424 };
 425
 426 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c);
 427
 428 /*
 429   Stage 2 of ncalrpc: rpc pipe opened (or not)
 430 */
 431 static void continue_pipe_open_ncalrpc(struct composite_context *ctx)
 432 {
 433         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 434                                                       struct composite_context);
 435
 436         /* receive result of pipe open request on ncalrpc */
 437         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 438         if (!composite_is_ok(c)) return;
 439
 440         composite_done(c);
 441 }
 442
 443
 444 /*
 445    Initiate async open of a rpc connection request on NCALRPC using
 446    the binding structure to determine the endpoint and options
 447 */
 448 static struct composite_context* dcerpc_pipe_connect_ncalrpc_send(TALLOC_CTX *mem_ctx,
 449                                                                   struct dcerpc_pipe_connect *io, struct loadparm_context *lp_ctx)
 450 {
 451         struct composite_context *c;
 452         struct pipe_ncalrpc_state *s;
 453         struct composite_context *pipe_req;
 454
 455         /* composite context allocation and setup */
 456         c = composite_create(mem_ctx, io->pipe->conn->event_ctx);
 457         if (c == NULL) return NULL;
 458
 459         s = talloc_zero(c, struct pipe_ncalrpc_state);
 460         if (composite_nomem(s, c)) return c;
 461         c->private_data = s;
 462
 463         /* store input parameters in state structure */
 464         s->io  = *io;
 465
 466         /* send pipe open request */
 467         pipe_req = dcerpc_pipe_open_pipe_send(s->io.pipe->conn, lpcfg_ncalrpc_dir(lp_ctx),
 468                                               s->io.binding->endpoint);
 469         composite_continue(c, pipe_req, continue_pipe_open_ncalrpc, c);
 470         return c;
 471 }
 472
 473
 474 /*
 475   Receive result of a rpc connection to a rpc pipe on NCALRPC
 476 */
 477 static NTSTATUS dcerpc_pipe_connect_ncalrpc_recv(struct composite_context *c)
 478 {
 479         NTSTATUS status = composite_wait(c);
 480
 481         talloc_free(c);
 482         return status;
 483 }
 484
 485
 486 struct pipe_connect_state {
 487         struct dcerpc_pipe *pipe;
 488         struct dcerpc_binding *binding;
 489         const struct ndr_interface_table *table;
 490         struct cli_credentials *credentials;
 491         struct loadparm_context *lp_ctx;
 492 };
 493
 494
 495 static void continue_map_binding(struct composite_context *ctx);
 496 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s);
 497 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx);
 498 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx);
 499 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx);
 500 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx);
 501 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx);
 502 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s);
 503 static void continue_pipe_auth(struct composite_context *ctx);
 504
 505
 506 /*
 507   Stage 2 of pipe_connect_b: Receive result of endpoint mapping
 508 */
 509 static void continue_map_binding(struct composite_context *ctx)
 510 {
 511         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 512                                                       struct composite_context);
 513         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 514                                                        struct pipe_connect_state);
 515
 516         c->status = dcerpc_epm_map_binding_recv(ctx);
 517         if (!composite_is_ok(c)) return;
 518
 519         DEBUG(2,("Mapped to DCERPC endpoint %s\n", s->binding->endpoint));
 520
 521         continue_connect(c, s);
 522 }
 523
 524
 525 /*
 526   Stage 2 of pipe_connect_b: Continue connection after endpoint is known
 527 */
 528 static void continue_connect(struct composite_context *c, struct pipe_connect_state *s)
 529 {
 530         struct dcerpc_pipe_connect pc;
 531
 532         /* potential exits to another stage by sending an async request */
 533         struct composite_context *ncacn_np_smb2_req;
 534         struct composite_context *ncacn_np_smb_req;
 535         struct composite_context *ncacn_ip_tcp_req;
 536         struct composite_context *ncacn_unix_req;
 537         struct composite_context *ncalrpc_req;
 538
 539         /* dcerpc pipe connect input parameters */
 540         pc.pipe         = s->pipe;
 541         pc.binding      = s->binding;
 542         pc.interface    = s->table;
 543         pc.creds        = s->credentials;
 544         pc.resolve_ctx  = lpcfg_resolve_context(s->lp_ctx);
 545
 546         /* connect dcerpc pipe depending on required transport */
 547         switch (s->binding->transport) {
 548         case NCACN_NP:
 549                 if (pc.binding->flags & DCERPC_SMB2) {
 550                         /* new varient of SMB a.k.a. SMB2 */
 551                         ncacn_np_smb2_req = dcerpc_pipe_connect_ncacn_np_smb2_send(c, &pc, s->lp_ctx);
 552                         composite_continue(c, ncacn_np_smb2_req, continue_pipe_connect_ncacn_np_smb2, c);
 553                         return;
 554
 555                 } else {
 556                         /* good old ordinary SMB */
 557                         ncacn_np_smb_req = dcerpc_pipe_connect_ncacn_np_smb_send(c, &pc, s->lp_ctx);
 558                         composite_continue(c, ncacn_np_smb_req, continue_pipe_connect_ncacn_np_smb, c);
 559                         return;
 560                 }
 561                 break;
 562
 563         case NCACN_IP_TCP:
 564                 ncacn_ip_tcp_req = dcerpc_pipe_connect_ncacn_ip_tcp_send(c, &pc);
 565                 composite_continue(c, ncacn_ip_tcp_req, continue_pipe_connect_ncacn_ip_tcp, c);
 566                 return;
 567
 568         case NCACN_UNIX_STREAM:
 569                 ncacn_unix_req = dcerpc_pipe_connect_ncacn_unix_stream_send(c, &pc);
 570                 composite_continue(c, ncacn_unix_req, continue_pipe_connect_ncacn_unix, c);
 571                 return;
 572
 573         case NCALRPC:
 574                 ncalrpc_req = dcerpc_pipe_connect_ncalrpc_send(c, &pc, s->lp_ctx);
 575                 composite_continue(c, ncalrpc_req, continue_pipe_connect_ncalrpc, c);
 576                 return;
 577
 578         default:
 579                 /* looks like a transport we don't support now */
 580                 composite_error(c, NT_STATUS_NOT_SUPPORTED);
 581         }
 582 }
 583
 584
 585 /*
 586   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 587   named pipe on smb2
 588 */
 589 static void continue_pipe_connect_ncacn_np_smb2(struct composite_context *ctx)
 590 {
 591         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 592                                                       struct composite_context);
 593         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 594                                                        struct pipe_connect_state);
 595
 596         c->status = dcerpc_pipe_connect_ncacn_np_smb2_recv(ctx);
 597         if (!composite_is_ok(c)) return;
 598
 599         continue_pipe_connect(c, s);
 600 }
 601
 602
 603 /*
 604   Stage 3 of pipe_connect_b: Receive result of pipe connect request on
 605   named pipe on smb
 606 */
 607 static void continue_pipe_connect_ncacn_np_smb(struct composite_context *ctx)
 608 {
 609         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 610                                                       struct composite_context);
 611         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 612                                                        struct pipe_connect_state);
 613
 614         c->status = dcerpc_pipe_connect_ncacn_np_smb_recv(ctx);
 615         if (!composite_is_ok(c)) return;
 616
 617         continue_pipe_connect(c, s);
 618 }
 619
 620
 621 /*
 622   Stage 3 of pipe_connect_b: Receive result of pipe connect request on tcp/ip
 623 */
 624 static void continue_pipe_connect_ncacn_ip_tcp(struct composite_context *ctx)
 625 {
 626         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 627                                                       struct composite_context);
 628         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 629                                                        struct pipe_connect_state);
 630
 631         c->status = dcerpc_pipe_connect_ncacn_ip_tcp_recv(ctx);
 632         if (!composite_is_ok(c)) return;
 633
 634         continue_pipe_connect(c, s);
 635 }
 636
 637
 638 /*
 639   Stage 3 of pipe_connect_b: Receive result of pipe connect request on unix socket
 640 */
 641 static void continue_pipe_connect_ncacn_unix(struct composite_context *ctx)
 642 {
 643         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 644                                                       struct composite_context);
 645         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 646                                                        struct pipe_connect_state);
 647
 648         c->status = dcerpc_pipe_connect_ncacn_unix_stream_recv(ctx);
 649         if (!composite_is_ok(c)) return;
 650
 651         continue_pipe_connect(c, s);
 652 }
 653
 654
 655 /*
 656   Stage 3 of pipe_connect_b: Receive result of pipe connect request on local rpc
 657 */
 658 static void continue_pipe_connect_ncalrpc(struct composite_context *ctx)
 659 {
 660         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 661                                                       struct composite_context);
 662         struct pipe_connect_state *s = talloc_get_type(c->private_data,
 663                                                        struct pipe_connect_state);
 664
 665         c->status = dcerpc_pipe_connect_ncalrpc_recv(ctx);
 666         if (!composite_is_ok(c)) return;
 667
 668         continue_pipe_connect(c, s);
 669 }
 670
 671
 672 /*
 673   Stage 4 of pipe_connect_b: Start an authentication on connected dcerpc pipe
 674   depending on credentials and binding flags passed.
 675 */
 676 static void continue_pipe_connect(struct composite_context *c, struct pipe_connect_state *s)
 677 {
 678         struct composite_context *auth_bind_req;
 679
 680         s->pipe->binding = s->binding;
 681         if (!talloc_reference(s->pipe, s->binding)) {
 682                 composite_error(c, NT_STATUS_NO_MEMORY);
 683                 return;
 684         }
 685
 686         auth_bind_req = dcerpc_pipe_auth_send(s->pipe, s->binding, s->table,
 687                                               s->credentials, s->lp_ctx);
 688         composite_continue(c, auth_bind_req, continue_pipe_auth, c);
 689 }
 690
 691
 692 /*
 693   Stage 5 of pipe_connect_b: Receive result of pipe authentication request
 694   and say if all went ok
 695 */
 696 static void continue_pipe_auth(struct composite_context *ctx)
 697 {
 698         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 699                                                       struct composite_context);
 700         struct pipe_connect_state *s = talloc_get_type(c->private_data, struct pipe_connect_state);
 701
 702         c->status = dcerpc_pipe_auth_recv(ctx, s, &s->pipe);
 703         if (!composite_is_ok(c)) return;
 704
 705         composite_done(c);
 706 }
 707
 708
 709 /*
 710   handle timeouts of a dcerpc connect
 711 */
 712 static void dcerpc_connect_timeout_handler(struct tevent_context *ev, struct tevent_timer *te,
 713                                            struct timeval t, void *private_data)
 714 {
 715         struct composite_context *c = talloc_get_type(private_data, struct composite_context);
 716         composite_error(c, NT_STATUS_IO_TIMEOUT);
 717 }
 718
 719 /*
 720   start a request to open a rpc connection to a rpc pipe, using
 721   specified binding structure to determine the endpoint and options
 722 */
 723 _PUBLIC_ struct composite_context* dcerpc_pipe_connect_b_send(TALLOC_CTX *parent_ctx,
 724                                                      struct dcerpc_binding *binding,
 725                                                      const struct ndr_interface_table *table,
 726                                                      struct cli_credentials *credentials,
 727                                                      struct tevent_context *ev,
 728                                                      struct loadparm_context *lp_ctx)
 729 {
 730         struct composite_context *c;
 731         struct pipe_connect_state *s;
 732         struct tevent_context *new_ev = NULL;
 733
 734         /* composite context allocation and setup */
 735         c = composite_create(parent_ctx, ev);
 736         if (c == NULL) {
 737                 talloc_free(new_ev);
 738                 return NULL;
 739         }
 740         talloc_steal(c, new_ev);
 741
 742         s = talloc_zero(c, struct pipe_connect_state);
 743         if (composite_nomem(s, c)) return c;
 744         c->private_data = s;
 745
 746         /* initialise dcerpc pipe structure */
 747         s->pipe = dcerpc_pipe_init(c, ev);
 748         if (composite_nomem(s->pipe, c)) return c;
 749
 750         if (DEBUGLEVEL >= 10)
 751                 s->pipe->conn->packet_log_dir = lpcfg_lockdir(lp_ctx);
 752
 753         /* store parameters in state structure */
 754         s->binding      = binding;
 755         s->table        = table;
 756         s->credentials  = credentials;
 757         s->lp_ctx       = lp_ctx;
 758
 759         event_add_timed(c->event_ctx, c,
 760                         timeval_current_ofs(DCERPC_REQUEST_TIMEOUT, 0),
 761                         dcerpc_connect_timeout_handler, c);
 762
 763         switch (s->binding->transport) {
 764         case NCA_UNKNOWN: {
 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         case NCACN_NP:
 774         case NCACN_IP_TCP:
 775         case NCALRPC:
 776                 if (!s->binding->endpoint) {
 777                         struct composite_context *binding_req;
 778                         binding_req = dcerpc_epm_map_binding_send(c, s->binding, s->table,
 779                                                                   s->pipe->conn->event_ctx,
 780                                                                   s->lp_ctx);
 781                         composite_continue(c, binding_req, continue_map_binding, c);
 782                         return c;
 783                 }
 784
 785         default:
 786                 break;
 787         }
 788
 789         continue_connect(c, s);
 790         return c;
 791 }
 792
 793
 794 /*
 795   receive result of a request to open a rpc connection to a rpc pipe
 796 */
 797 _PUBLIC_ NTSTATUS dcerpc_pipe_connect_b_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
 798                                     struct dcerpc_pipe **p)
 799 {
 800         NTSTATUS status;
 801         struct pipe_connect_state *s;
 802
 803         status = composite_wait(c);
 804
 805         if (NT_STATUS_IS_OK(status)) {
 806                 s = talloc_get_type(c->private_data, struct pipe_connect_state);
 807                 talloc_steal(mem_ctx, s->pipe);
 808                 *p = s->pipe;
 809         }
 810         talloc_free(c);
 811         return status;
 812 }
 813
 814
 815 /*
 816   open a rpc connection to a rpc pipe, using the specified
 817   binding structure to determine the endpoint and options - sync version
 818 */
 819 _PUBLIC_ NTSTATUS dcerpc_pipe_connect_b(TALLOC_CTX *parent_ctx,
 820                                struct dcerpc_pipe **pp,
 821                                struct dcerpc_binding *binding,
 822                                const struct ndr_interface_table *table,
 823                                struct cli_credentials *credentials,
 824                                struct tevent_context *ev,
 825                                struct loadparm_context *lp_ctx)
 826 {
 827         struct composite_context *c;
 828
 829         c = dcerpc_pipe_connect_b_send(parent_ctx, binding, table,
 830                                        credentials, ev, lp_ctx);
 831         return dcerpc_pipe_connect_b_recv(c, parent_ctx, pp);
 832 }
 833
 834
 835 struct pipe_conn_state {
 836         struct dcerpc_pipe *pipe;
 837 };
 838
 839
 840 static void continue_pipe_connect_b(struct composite_context *ctx);
 841
 842
 843 /*
 844   Initiate rpc connection to a rpc pipe, using the specified string
 845   binding to determine the endpoint and options.
 846   The string is to be parsed to a binding structure first.
 847 */
 848 _PUBLIC_ struct composite_context* dcerpc_pipe_connect_send(TALLOC_CTX *parent_ctx,
 849                                                    const char *binding,
 850                                                    const struct ndr_interface_table *table,
 851                                                    struct cli_credentials *credentials,
 852                                                    struct tevent_context *ev, struct loadparm_context *lp_ctx)
 853 {
 854         struct composite_context *c;
 855         struct pipe_conn_state *s;
 856         struct dcerpc_binding *b;
 857         struct composite_context *pipe_conn_req;
 858
 859         /* composite context allocation and setup */
 860         c = composite_create(parent_ctx, ev);
 861         if (c == NULL) {
 862                 return NULL;
 863         }
 864
 865         s = talloc_zero(c, struct pipe_conn_state);
 866         if (composite_nomem(s, c)) return c;
 867         c->private_data = s;
 868
 869         /* parse binding string to the structure */
 870         c->status = dcerpc_parse_binding(c, binding, &b);
 871         if (!NT_STATUS_IS_OK(c->status)) {
 872                 DEBUG(0, ("Failed to parse dcerpc binding '%s'\n", binding));
 873                 composite_error(c, c->status);
 874                 return c;
 875         }
 876
 877         DEBUG(3, ("Using binding %s\n", dcerpc_binding_string(c, b)));
 878
 879         /*
 880            start connecting to a rpc pipe after binding structure
 881            is established
 882          */
 883         pipe_conn_req = dcerpc_pipe_connect_b_send(c, b, table,
 884                                                    credentials, ev, lp_ctx);
 885         composite_continue(c, pipe_conn_req, continue_pipe_connect_b, c);
 886         return c;
 887 }
 888
 889
 890 /*
 891   Stage 2 of pipe_connect: Receive result of actual pipe connect request
 892   and say if we're done ok
 893 */
 894 static void continue_pipe_connect_b(struct composite_context *ctx)
 895 {
 896         struct composite_context *c = talloc_get_type(ctx->async.private_data,
 897                                                       struct composite_context);
 898         struct pipe_conn_state *s = talloc_get_type(c->private_data,
 899                                                     struct pipe_conn_state);
 900
 901         c->status = dcerpc_pipe_connect_b_recv(ctx, c, &s->pipe);
 902         talloc_steal(s, s->pipe);
 903         if (!composite_is_ok(c)) return;
 904
 905         composite_done(c);
 906 }
 907
 908
 909 /*
 910   Receive result of pipe connect (using binding string) request
 911   and return connected pipe structure.
 912 */
 913 NTSTATUS dcerpc_pipe_connect_recv(struct composite_context *c,
 914                                   TALLOC_CTX *mem_ctx,
 915                                   struct dcerpc_pipe **pp)
 916 {
 917         NTSTATUS status;
 918         struct pipe_conn_state *s;
 919
 920         status = composite_wait(c);
 921         if (NT_STATUS_IS_OK(status)) {
 922                 s = talloc_get_type(c->private_data, struct pipe_conn_state);
 923                 *pp = talloc_steal(mem_ctx, s->pipe);
 924         }
 925         talloc_free(c);
 926         return status;
 927 }
 928
 929
 930 /*
 931   Open a rpc connection to a rpc pipe, using the specified string
 932   binding to determine the endpoint and options - sync version
 933 */
 934 _PUBLIC_ NTSTATUS dcerpc_pipe_connect(TALLOC_CTX *parent_ctx,
 935                              struct dcerpc_pipe **pp,
 936                              const char *binding,
 937                              const struct ndr_interface_table *table,
 938                              struct cli_credentials *credentials,
 939                              struct tevent_context *ev,
 940                              struct loadparm_context *lp_ctx)
 941 {
 942         struct composite_context *c;
 943         c = dcerpc_pipe_connect_send(parent_ctx, binding,
 944                                      table, credentials, ev, lp_ctx);
 945         return dcerpc_pipe_connect_recv(c, parent_ctx, pp);
 946 }
 947