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(subreq, ev)) {
 254                 status = map_nt_error_from_unix_common(errno);
 255                 talloc_free(frame);
 256                 return status;
 257         }
 258
 259         status = dcerpc_binding_handle_raw_call_recv(subreq,
 260                                                      mem_ctx,
 261                                                      out_data,
 262                                                      out_length,
 263                                                      out_flags);
 264         if (!NT_STATUS_IS_OK(status)) {
 265                 talloc_free(frame);
 266                 return status;
 267         }
 268
 269         TALLOC_FREE(frame);
 270         return NT_STATUS_OK;
 271 }
 272
 273 struct dcerpc_binding_handle_disconnect_state {
 274         const struct dcerpc_binding_handle_ops *ops;
 275 };
 276
 277 static void dcerpc_binding_handle_disconnect_done(struct tevent_req *subreq);
 278
 279 struct tevent_req *dcerpc_binding_handle_disconnect_send(TALLOC_CTX *mem_ctx,
 280                                                 struct tevent_context *ev,
 281                                                 struct dcerpc_binding_handle *h)
 282 {
 283         struct tevent_req *req;
 284         struct dcerpc_binding_handle_disconnect_state *state;
 285         struct tevent_req *subreq;
 286
 287         req = tevent_req_create(mem_ctx, &state,
 288                                 struct dcerpc_binding_handle_disconnect_state);
 289         if (req == NULL) {
 290                 return NULL;
 291         }
 292
 293         state->ops = h->ops;
 294
 295         subreq = state->ops->disconnect_send(state, ev, h);
 296         if (tevent_req_nomem(subreq, req)) {
 297                 return tevent_req_post(req, ev);
 298         }
 299         tevent_req_set_callback(subreq, dcerpc_binding_handle_disconnect_done, req);
 300
 301         return req;
 302 }
 303
 304 static void dcerpc_binding_handle_disconnect_done(struct tevent_req *subreq)
 305 {
 306         struct tevent_req *req = tevent_req_callback_data(subreq,
 307                                  struct tevent_req);
 308         struct dcerpc_binding_handle_disconnect_state *state =
 309                 tevent_req_data(req,
 310                 struct dcerpc_binding_handle_disconnect_state);
 311         NTSTATUS error;
 312
 313         error = state->ops->disconnect_recv(subreq);
 314         TALLOC_FREE(subreq);
 315         if (tevent_req_nterror(req, error)) {
 316                 return;
 317         }
 318
 319         tevent_req_done(req);
 320 }
 321
 322 NTSTATUS dcerpc_binding_handle_disconnect_recv(struct tevent_req *req)
 323 {
 324         NTSTATUS error;
 325
 326         if (tevent_req_is_nterror(req, &error)) {
 327                 tevent_req_received(req);
 328                 return error;
 329         }
 330
 331         tevent_req_received(req);
 332         return NT_STATUS_OK;
 333 }
 334
 335 struct dcerpc_binding_handle_call_state {
 336         struct dcerpc_binding_handle *h;
 337         const struct ndr_interface_call *call;
 338         TALLOC_CTX *r_mem;
 339         void *r_ptr;
 340         struct ndr_push *push;
 341         DATA_BLOB request;
 342         DATA_BLOB response;
 343         struct ndr_pull *pull;
 344 };
 345
 346 static void dcerpc_binding_handle_call_done(struct tevent_req *subreq);
 347
 348 struct tevent_req *dcerpc_binding_handle_call_send(TALLOC_CTX *mem_ctx,
 349                                         struct tevent_context *ev,
 350                                         struct dcerpc_binding_handle *h,
 351                                         const struct GUID *object,
 352                                         const struct ndr_interface_table *table,
 353                                         uint32_t opnum,
 354                                         TALLOC_CTX *r_mem,
 355                                         void *r_ptr)
 356 {
 357         struct tevent_req *req;
 358         struct dcerpc_binding_handle_call_state *state;
 359         struct tevent_req *subreq;
 360         enum ndr_err_code ndr_err;
 361
 362         req = tevent_req_create(mem_ctx, &state,
 363                                 struct dcerpc_binding_handle_call_state);
 364         if (req == NULL) {
 365                 return NULL;
 366         }
 367
 368 #if 0 /* TODO: activate this when the callers are fixed */
 369         if (table != h->table) {
 370                 tevent_req_nterror(req, NT_STATUS_INVALID_HANDLE);
 371                 return tevent_req_post(req, ev);
 372         }
 373 #endif
 374
 375         if (opnum >= table->num_calls) {
 376                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 377                 return tevent_req_post(req, ev);
 378         }
 379
 380         state->h = h;
 381         state->call = &table->calls[opnum];
 382
 383         state->r_mem = r_mem;
 384         state->r_ptr = r_ptr;
 385
 386         /* setup for a ndr_push_* call */
 387         state->push = ndr_push_init_ctx(state);
 388         if (tevent_req_nomem(state->push, req)) {
 389                 return tevent_req_post(req, ev);
 390         }
 391
 392         if (h->ops->ref_alloc && h->ops->ref_alloc(h)) {
 393                 state->push->flags |= LIBNDR_FLAG_REF_ALLOC;
 394         }
 395
 396         if (h->ops->push_bigendian && h->ops->push_bigendian(h)) {
 397                 state->push->flags |= LIBNDR_FLAG_BIGENDIAN;
 398         }
 399
 400         if (h->ops->use_ndr64 && h->ops->use_ndr64(h)) {
 401                 state->push->flags |= LIBNDR_FLAG_NDR64;
 402         }
 403
 404         if (h->ops->do_ndr_print) {
 405                 h->ops->do_ndr_print(h, NDR_IN | NDR_SET_VALUES,
 406                                      state->r_ptr, state->call);
 407         }
 408
 409         /* push the structure into a blob */
 410         ndr_err = state->call->ndr_push(state->push, NDR_IN, state->r_ptr);
 411         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 412                 NTSTATUS error;
 413                 error = ndr_map_error2ntstatus(ndr_err);
 414                 if (h->ops->ndr_push_failed) {
 415                         h->ops->ndr_push_failed(h, error,
 416                                                 state->r_ptr,
 417                                                 state->call);
 418                 }
 419                 tevent_req_nterror(req, error);
 420                 return tevent_req_post(req, ev);
 421         }
 422
 423         /* retrieve the blob */
 424         state->request = ndr_push_blob(state->push);
 425
 426         if (h->ops->ndr_validate_in) {
 427                 NTSTATUS error;
 428                 error = h->ops->ndr_validate_in(h, state,
 429                                                 &state->request,
 430                                                 state->call);
 431                 if (!NT_STATUS_IS_OK(error)) {
 432                         tevent_req_nterror(req, error);
 433                         return tevent_req_post(req, ev);
 434                 }
 435         }
 436
 437         subreq = dcerpc_binding_handle_raw_call_send(state, ev,
 438                                                      h, object, opnum,
 439                                                      state->push->flags,
 440                                                      state->request.data,
 441                                                      state->request.length);
 442         if (tevent_req_nomem(subreq, req)) {
 443                 return tevent_req_post(req, ev);
 444         }
 445         tevent_req_set_callback(subreq, dcerpc_binding_handle_call_done, req);
 446
 447         return req;
 448 }
 449
 450 static void dcerpc_binding_handle_call_done(struct tevent_req *subreq)
 451 {
 452         struct tevent_req *req = tevent_req_callback_data(subreq,
 453                                  struct tevent_req);
 454         struct dcerpc_binding_handle_call_state *state =
 455                 tevent_req_data(req,
 456                 struct dcerpc_binding_handle_call_state);
 457         struct dcerpc_binding_handle *h = state->h;
 458         NTSTATUS error;
 459         uint32_t out_flags = 0;
 460         enum ndr_err_code ndr_err;
 461
 462         error = dcerpc_binding_handle_raw_call_recv(subreq, state,
 463                                                     &state->response.data,
 464                                                     &state->response.length,
 465                                                     &out_flags);
 466         TALLOC_FREE(subreq);
 467         if (tevent_req_nterror(req, error)) {
 468                 return;
 469         }
 470
 471         state->pull = ndr_pull_init_blob(&state->response, state);
 472         if (tevent_req_nomem(state->pull, req)) {
 473                 return;
 474         }
 475         state->pull->flags = state->push->flags;
 476
 477         if (out_flags & LIBNDR_FLAG_BIGENDIAN) {
 478                 state->pull->flags |= LIBNDR_FLAG_BIGENDIAN;
 479         } else {
 480                 state->pull->flags &= ~LIBNDR_FLAG_BIGENDIAN;
 481         }
 482
 483         state->pull->current_mem_ctx = state->r_mem;
 484
 485         /* pull the structure from the blob */
 486         ndr_err = state->call->ndr_pull(state->pull, NDR_OUT, state->r_ptr);
 487         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 488                 error = ndr_map_error2ntstatus(ndr_err);
 489                 if (h->ops->ndr_pull_failed) {
 490                         h->ops->ndr_pull_failed(h, error,
 491                                                 &state->response,
 492                                                 state->call);
 493                 }
 494                 tevent_req_nterror(req, error);
 495                 return;
 496         }
 497
 498         if (h->ops->do_ndr_print) {
 499                 h->ops->do_ndr_print(h, NDR_OUT,
 500                                      state->r_ptr, state->call);
 501         }
 502
 503         if (h->ops->ndr_validate_out) {
 504                 error = h->ops->ndr_validate_out(h,
 505                                                  state->pull,
 506                                                  state->r_ptr,
 507                                                  state->call);
 508                 if (!NT_STATUS_IS_OK(error)) {
 509                         tevent_req_nterror(req, error);
 510                         return;
 511                 }
 512         }
 513
 514         tevent_req_done(req);
 515 }
 516
 517 NTSTATUS dcerpc_binding_handle_call_recv(struct tevent_req *req)
 518 {
 519         return tevent_req_simple_recv_ntstatus(req);
 520 }
 521
 522 NTSTATUS dcerpc_binding_handle_call(struct dcerpc_binding_handle *h,
 523                                     const struct GUID *object,
 524                                     const struct ndr_interface_table *table,
 525                                     uint32_t opnum,
 526                                     TALLOC_CTX *r_mem,
 527                                     void *r_ptr)
 528 {
 529         TALLOC_CTX *frame = talloc_stackframe();
 530         struct tevent_context *ev;
 531         struct tevent_req *subreq;
 532         NTSTATUS status = NT_STATUS_NO_MEMORY;
 533
 534         /*
 535          * TODO: allow only one sync call
 536          */
 537
 538         if (h->sync_ev) {
 539                 ev = h->sync_ev;
 540         } else {
 541                 ev = samba_tevent_context_init(frame);
 542         }
 543         if (ev == NULL) {
 544                 goto fail;
 545         }
 546
 547         subreq = dcerpc_binding_handle_call_send(frame, ev,
 548                                                  h, object, table,
 549                                                  opnum, r_mem, r_ptr);
 550         if (subreq == NULL) {
 551                 goto fail;
 552         }
 553
 554         if (!tevent_req_poll_ntstatus(subreq, ev, &status)) {
 555                 goto fail;
 556         }
 557
 558         status = dcerpc_binding_handle_call_recv(subreq);
 559 fail:
 560         TALLOC_FREE(frame);
 561         return status;
 562 }