librpc/rpc/binding_handle.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    dcerpc binding handle functions
   5
   6    Copyright (C) Stefan Metzmacher 2010
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include <tevent.h>
  24 #include "../lib/util/tevent_ntstatus.h"
  25 #include "librpc/rpc/dcerpc.h"
  26 #include "rpc_common.h"
  27
  28 struct dcerpc_binding_handle {
  29         void *private_data;
  30         const struct dcerpc_binding_handle_ops *ops;
  31         const char *location;
  32         const struct GUID *object;
  33         const struct ndr_interface_table *table;
  34         struct tevent_context *sync_ev;
  35 };
  36
  37 static int dcerpc_binding_handle_destructor(struct dcerpc_binding_handle *b)
  38 {
  39         return 0;
  40 }
  41
  42 struct dcerpc_binding_handle *_dcerpc_binding_handle_create(TALLOC_CTX *mem_ctx,
  43                                         const struct dcerpc_binding_handle_ops *ops,
  44                                         const struct GUID *object,
  45                                         const struct ndr_interface_table *table,
  46                                         void *pstate,
  47                                         size_t psize,
  48                                         const char *type,
  49                                         const char *location)
  50 {
  51         struct dcerpc_binding_handle *h;
  52         void **ppstate = (void **)pstate;
  53         void *state;
  54
  55         h = talloc_zero(mem_ctx, struct dcerpc_binding_handle);
  56         if (h == NULL) {
  57                 return NULL;
  58         }
  59         h->ops          = ops;
  60         h->location     = location;
  61         h->object       = object;
  62         h->table        = table;
  63
  64         state = talloc_zero_size(h, psize);
  65         if (state == NULL) {
  66                 talloc_free(h);
  67                 return NULL;
  68         }
  69         talloc_set_name_const(state, type);
  70
  71         h->private_data = state;
  72
  73         talloc_set_destructor(h, dcerpc_binding_handle_destructor);
  74
  75         *ppstate = state;
  76         return h;
  77 }
  78
  79 void *_dcerpc_binding_handle_data(struct dcerpc_binding_handle *h)
  80 {
  81         return h->private_data;
  82 }
  83
  84 void dcerpc_binding_handle_set_sync_ev(struct dcerpc_binding_handle *h,
  85                                        struct tevent_context *ev)
  86 {
  87         h->sync_ev = ev;
  88 }
  89
  90 bool dcerpc_binding_handle_is_connected(struct dcerpc_binding_handle *h)
  91 {
  92         return h->ops->is_connected(h);
  93 }
  94
  95 uint32_t dcerpc_binding_handle_set_timeout(struct dcerpc_binding_handle *h,
  96                                            uint32_t timeout)
  97 {
  98         return h->ops->set_timeout(h, timeout);
  99 }
 100
 101 void dcerpc_binding_handle_auth_info(struct dcerpc_binding_handle *h,
 102                                      enum dcerpc_AuthType *auth_type,
 103                                      enum dcerpc_AuthLevel *auth_level)
 104 {
 105         enum dcerpc_AuthType _auth_type;
 106         enum dcerpc_AuthLevel _auth_level;
 107
 108         if (auth_type == NULL) {
 109                 auth_type = &_auth_type;
 110         }
 111
 112         if (auth_level == NULL) {
 113                 auth_level = &_auth_level;
 114         }
 115
 116         *auth_type = DCERPC_AUTH_TYPE_NONE;
 117         *auth_level = DCERPC_AUTH_LEVEL_NONE;
 118
 119         if (h->ops->auth_info == NULL) {
 120                 return;
 121         }
 122
 123         h->ops->auth_info(h, auth_type, auth_level);
 124 }
 125
 126 struct dcerpc_binding_handle_raw_call_state {
 127         const struct dcerpc_binding_handle_ops *ops;
 128         uint8_t *out_data;
 129         size_t out_length;
 130         uint32_t out_flags;
 131 };
 132
 133 static void dcerpc_binding_handle_raw_call_done(struct tevent_req *subreq);
 134
 135 struct tevent_req *dcerpc_binding_handle_raw_call_send(TALLOC_CTX *mem_ctx,
 136                                                 struct tevent_context *ev,
 137                                                 struct dcerpc_binding_handle *h,
 138                                                 const struct GUID *object,
 139                                                 uint32_t opnum,
 140                                                 uint32_t in_flags,
 141                                                 const uint8_t *in_data,
 142                                                 size_t in_length)
 143 {
 144         struct tevent_req *req;
 145         struct dcerpc_binding_handle_raw_call_state *state;
 146         struct tevent_req *subreq;
 147
 148         req = tevent_req_create(mem_ctx, &state,
 149                                 struct dcerpc_binding_handle_raw_call_state);
 150         if (req == NULL) {
 151                 return NULL;
 152         }
 153         state->ops = h->ops;
 154         state->out_data = NULL;
 155         state->out_length = 0;
 156         state->out_flags = 0;
 157
 158         subreq = state->ops->raw_call_send(state, ev, h,
 159                                            object, opnum,
 160                                            in_flags, in_data, in_length);
 161         if (tevent_req_nomem(subreq, req)) {
 162                 return tevent_req_post(req, ev);
 163         }
 164         tevent_req_set_callback(subreq, dcerpc_binding_handle_raw_call_done, req);
 165
 166         return req;
 167 }
 168
 169 static void dcerpc_binding_handle_raw_call_done(struct tevent_req *subreq)
 170 {
 171         struct tevent_req *req = tevent_req_callback_data(subreq,
 172                                  struct tevent_req);
 173         struct dcerpc_binding_handle_raw_call_state *state =
 174                 tevent_req_data(req,
 175                 struct dcerpc_binding_handle_raw_call_state);
 176         NTSTATUS error;
 177
 178         error = state->ops->raw_call_recv(subreq, state,
 179                                           &state->out_data,
 180                                           &state->out_length,
 181                                           &state->out_flags);
 182         TALLOC_FREE(subreq);
 183         if (tevent_req_nterror(req, error)) {
 184                 return;
 185         }
 186
 187         tevent_req_done(req);
 188 }
 189
 190 NTSTATUS dcerpc_binding_handle_raw_call_recv(struct tevent_req *req,
 191                                              TALLOC_CTX *mem_ctx,
 192                                              uint8_t **out_data,
 193                                              size_t *out_length,
 194                                              uint32_t *out_flags)
 195 {
 196         struct dcerpc_binding_handle_raw_call_state *state =
 197                 tevent_req_data(req,
 198                 struct dcerpc_binding_handle_raw_call_state);
 199         NTSTATUS error;
 200
 201         if (tevent_req_is_nterror(req, &error)) {
 202                 tevent_req_received(req);
 203                 return error;
 204         }
 205
 206         *out_data = talloc_move(mem_ctx, &state->out_data);
 207         *out_length = state->out_length;
 208         *out_flags = state->out_flags;
 209         tevent_req_received(req);
 210         return NT_STATUS_OK;
 211 }
 212
 213 NTSTATUS dcerpc_binding_handle_raw_call(struct dcerpc_binding_handle *h,
 214                                         const struct GUID *object,
 215                                         uint32_t opnum,
 216                                         uint32_t in_flags,
 217                                         const uint8_t *in_data,
 218                                         size_t in_length,
 219                                         TALLOC_CTX *mem_ctx,
 220                                         uint8_t **out_data,
 221                                         size_t *out_length,
 222                                         uint32_t *out_flags)
 223 {
 224         TALLOC_CTX *frame = talloc_stackframe();
 225         struct tevent_context *ev;
 226         struct tevent_req *subreq;
 227         NTSTATUS status;
 228
 229         /*
 230          * TODO: allow only one sync call
 231          */
 232
 233         if (h->sync_ev) {
 234                 ev = h->sync_ev;
 235         } else {
 236                 ev = samba_tevent_context_init(frame);
 237         }
 238         if (ev == NULL) {
 239                 talloc_free(frame);
 240                 return NT_STATUS_NO_MEMORY;
 241         }
 242
 243         subreq = dcerpc_binding_handle_raw_call_send(frame, ev,
 244                                                      h, object, opnum,
 245                                                      in_flags,
 246                                                      in_data,
 247                                                      in_length);
 248         if (subreq == NULL) {
 249                 talloc_free(frame);
 250                 return NT_STATUS_NO_MEMORY;
 251         }
 252
 253         if (!tevent_req_poll_ntstatus(subreq, ev, &status)) {
 254                 talloc_free(frame);
 255                 return status;
 256         }
 257
 258         status = dcerpc_binding_handle_raw_call_recv(subreq,
 259                                                      mem_ctx,
 260                                                      out_data,
 261                                                      out_length,
 262                                                      out_flags);
 263         if (!NT_STATUS_IS_OK(status)) {
 264                 talloc_free(frame);
 265                 return status;
 266         }
 267
 268         TALLOC_FREE(frame);
 269         return NT_STATUS_OK;
 270 }
 271
 272 struct dcerpc_binding_handle_disconnect_state {
 273         const struct dcerpc_binding_handle_ops *ops;
 274 };
 275
 276 static void dcerpc_binding_handle_disconnect_done(struct tevent_req *subreq);
 277
 278 struct tevent_req *dcerpc_binding_handle_disconnect_send(TALLOC_CTX *mem_ctx,
 279                                                 struct tevent_context *ev,
 280                                                 struct dcerpc_binding_handle *h)
 281 {
 282         struct tevent_req *req;
 283         struct dcerpc_binding_handle_disconnect_state *state;
 284         struct tevent_req *subreq;
 285
 286         req = tevent_req_create(mem_ctx, &state,
 287                                 struct dcerpc_binding_handle_disconnect_state);
 288         if (req == NULL) {
 289                 return NULL;
 290         }
 291
 292         state->ops = h->ops;
 293
 294         subreq = state->ops->disconnect_send(state, ev, h);
 295         if (tevent_req_nomem(subreq, req)) {
 296                 return tevent_req_post(req, ev);
 297         }
 298         tevent_req_set_callback(subreq, dcerpc_binding_handle_disconnect_done, req);
 299
 300         return req;
 301 }
 302
 303 static void dcerpc_binding_handle_disconnect_done(struct tevent_req *subreq)
 304 {
 305         struct tevent_req *req = tevent_req_callback_data(subreq,
 306                                  struct tevent_req);
 307         struct dcerpc_binding_handle_disconnect_state *state =
 308                 tevent_req_data(req,
 309                 struct dcerpc_binding_handle_disconnect_state);
 310         NTSTATUS error;
 311
 312         error = state->ops->disconnect_recv(subreq);
 313         TALLOC_FREE(subreq);
 314         if (tevent_req_nterror(req, error)) {
 315                 return;
 316         }
 317
 318         tevent_req_done(req);
 319 }
 320
 321 NTSTATUS dcerpc_binding_handle_disconnect_recv(struct tevent_req *req)
 322 {
 323         NTSTATUS error;
 324
 325         if (tevent_req_is_nterror(req, &error)) {
 326                 tevent_req_received(req);
 327                 return error;
 328         }
 329
 330         tevent_req_received(req);
 331         return NT_STATUS_OK;
 332 }
 333
 334 struct dcerpc_binding_handle_call_state {
 335         struct dcerpc_binding_handle *h;
 336         const struct ndr_interface_call *call;
 337         TALLOC_CTX *r_mem;
 338         void *r_ptr;
 339         struct ndr_push *push;
 340         DATA_BLOB request;
 341         DATA_BLOB response;
 342         struct ndr_pull *pull;
 343 };
 344
 345 static void dcerpc_binding_handle_call_done(struct tevent_req *subreq);
 346
 347 struct tevent_req *dcerpc_binding_handle_call_send(TALLOC_CTX *mem_ctx,
 348                                         struct tevent_context *ev,
 349                                         struct dcerpc_binding_handle *h,
 350                                         const struct GUID *object,
 351                                         const struct ndr_interface_table *table,
 352                                         uint32_t opnum,
 353                                         TALLOC_CTX *r_mem,
 354                                         void *r_ptr)
 355 {
 356         struct tevent_req *req;
 357         struct dcerpc_binding_handle_call_state *state;
 358         struct tevent_req *subreq;
 359         enum ndr_err_code ndr_err;
 360
 361         req = tevent_req_create(mem_ctx, &state,
 362                                 struct dcerpc_binding_handle_call_state);
 363         if (req == NULL) {
 364                 return NULL;
 365         }
 366
 367 #if 0 /* TODO: activate this when the callers are fixed */
 368         if (table != h->table) {
 369                 tevent_req_nterror(req, NT_STATUS_INVALID_HANDLE);
 370                 return tevent_req_post(req, ev);
 371         }
 372 #endif
 373
 374         if (opnum >= table->num_calls) {
 375                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 376                 return tevent_req_post(req, ev);
 377         }
 378
 379         state->h = h;
 380         state->call = &table->calls[opnum];
 381
 382         state->r_mem = r_mem;
 383         state->r_ptr = r_ptr;
 384
 385         /* setup for a ndr_push_* call */
 386         state->push = ndr_push_init_ctx(state);
 387         if (tevent_req_nomem(state->push, req)) {
 388                 return tevent_req_post(req, ev);
 389         }
 390
 391         if (h->ops->ref_alloc && h->ops->ref_alloc(h)) {
 392                 state->push->flags |= LIBNDR_FLAG_REF_ALLOC;
 393         }
 394
 395         if (h->ops->push_bigendian && h->ops->push_bigendian(h)) {
 396                 state->push->flags |= LIBNDR_FLAG_BIGENDIAN;
 397         }
 398
 399         if (h->ops->use_ndr64 && h->ops->use_ndr64(h)) {
 400                 state->push->flags |= LIBNDR_FLAG_NDR64;
 401         }
 402
 403         if (h->ops->do_ndr_print) {
 404                 h->ops->do_ndr_print(h, NDR_IN | NDR_SET_VALUES,
 405                                      state->r_ptr, state->call);
 406         }
 407
 408         /* push the structure into a blob */
 409         ndr_err = state->call->ndr_push(state->push, NDR_IN, state->r_ptr);
 410         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 411                 NTSTATUS error;
 412                 error = ndr_map_error2ntstatus(ndr_err);
 413                 if (h->ops->ndr_push_failed) {
 414                         h->ops->ndr_push_failed(h, error,
 415                                                 state->r_ptr,
 416                                                 state->call);
 417                 }
 418                 tevent_req_nterror(req, error);
 419                 return tevent_req_post(req, ev);
 420         }
 421
 422         /* retrieve the blob */
 423         state->request = ndr_push_blob(state->push);
 424
 425         if (h->ops->ndr_validate_in) {
 426                 NTSTATUS error;
 427                 error = h->ops->ndr_validate_in(h, state,
 428                                                 &state->request,
 429                                                 state->call);
 430                 if (!NT_STATUS_IS_OK(error)) {
 431                         tevent_req_nterror(req, error);
 432                         return tevent_req_post(req, ev);
 433                 }
 434         }
 435
 436         subreq = dcerpc_binding_handle_raw_call_send(state, ev,
 437                                                      h, object, opnum,
 438                                                      state->push->flags,
 439                                                      state->request.data,
 440                                                      state->request.length);
 441         if (tevent_req_nomem(subreq, req)) {
 442                 return tevent_req_post(req, ev);
 443         }
 444         tevent_req_set_callback(subreq, dcerpc_binding_handle_call_done, req);
 445
 446         return req;
 447 }
 448
 449 static void dcerpc_binding_handle_call_done(struct tevent_req *subreq)
 450 {
 451         struct tevent_req *req = tevent_req_callback_data(subreq,
 452                                  struct tevent_req);
 453         struct dcerpc_binding_handle_call_state *state =
 454                 tevent_req_data(req,
 455                 struct dcerpc_binding_handle_call_state);
 456         struct dcerpc_binding_handle *h = state->h;
 457         NTSTATUS error;
 458         uint32_t out_flags = 0;
 459         enum ndr_err_code ndr_err;
 460
 461         error = dcerpc_binding_handle_raw_call_recv(subreq, state,
 462                                                     &state->response.data,
 463                                                     &state->response.length,
 464                                                     &out_flags);
 465         TALLOC_FREE(subreq);
 466         if (tevent_req_nterror(req, error)) {
 467                 return;
 468         }
 469
 470         state->pull = ndr_pull_init_blob(&state->response, state);
 471         if (tevent_req_nomem(state->pull, req)) {
 472                 return;
 473         }
 474         state->pull->flags = state->push->flags;
 475
 476         if (out_flags & LIBNDR_FLAG_BIGENDIAN) {
 477                 state->pull->flags |= LIBNDR_FLAG_BIGENDIAN;
 478         } else {
 479                 state->pull->flags &= ~LIBNDR_FLAG_BIGENDIAN;
 480         }
 481
 482         state->pull->current_mem_ctx = state->r_mem;
 483
 484         /* pull the structure from the blob */
 485         ndr_err = state->call->ndr_pull(state->pull, NDR_OUT, state->r_ptr);
 486         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 487                 error = ndr_map_error2ntstatus(ndr_err);
 488                 if (h->ops->ndr_pull_failed) {
 489                         h->ops->ndr_pull_failed(h, error,
 490                                                 &state->response,
 491                                                 state->call);
 492                 }
 493                 tevent_req_nterror(req, error);
 494                 return;
 495         }
 496
 497         if (h->ops->do_ndr_print) {
 498                 h->ops->do_ndr_print(h, NDR_OUT,
 499                                      state->r_ptr, state->call);
 500         }
 501
 502         if (h->ops->ndr_validate_out) {
 503                 error = h->ops->ndr_validate_out(h,
 504                                                  state->pull,
 505                                                  state->r_ptr,
 506                                                  state->call);
 507                 if (!NT_STATUS_IS_OK(error)) {
 508                         tevent_req_nterror(req, error);
 509                         return;
 510                 }
 511         }
 512
 513         tevent_req_done(req);
 514 }
 515
 516 NTSTATUS dcerpc_binding_handle_call_recv(struct tevent_req *req)
 517 {
 518         return tevent_req_simple_recv_ntstatus(req);
 519 }
 520
 521 NTSTATUS dcerpc_binding_handle_call(struct dcerpc_binding_handle *h,
 522                                     const struct GUID *object,
 523                                     const struct ndr_interface_table *table,
 524                                     uint32_t opnum,
 525                                     TALLOC_CTX *r_mem,
 526                                     void *r_ptr)
 527 {
 528         TALLOC_CTX *frame = talloc_stackframe();
 529         struct tevent_context *ev;
 530         struct tevent_req *subreq;
 531         NTSTATUS status = NT_STATUS_NO_MEMORY;
 532
 533         /*
 534          * TODO: allow only one sync call
 535          */
 536
 537         if (h->sync_ev) {
 538                 ev = h->sync_ev;
 539         } else {
 540                 ev = samba_tevent_context_init(frame);
 541         }
 542         if (ev == NULL) {
 543                 goto fail;
 544         }
 545
 546         subreq = dcerpc_binding_handle_call_send(frame, ev,
 547                                                  h, object, table,
 548                                                  opnum, r_mem, r_ptr);
 549         if (subreq == NULL) {
 550                 goto fail;
 551         }
 552
 553         if (!tevent_req_poll_ntstatus(subreq, ev, &status)) {
 554                 goto fail;
 555         }
 556
 557         status = dcerpc_binding_handle_call_recv(subreq);
 558 fail:
 559         TALLOC_FREE(frame);
 560         return status;
 561 }