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 = NT_STATUS_NO_MEMORY;
 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                 goto fail;
 240         }
 241
 242         subreq = dcerpc_binding_handle_raw_call_send(frame, ev,
 243                                                      h, object, opnum,
 244                                                      in_flags,
 245                                                      in_data,
 246                                                      in_length);
 247         if (subreq == NULL) {
 248                 goto fail;
 249         }
 250
 251         if (!tevent_req_poll_ntstatus(subreq, ev, &status)) {
 252                 goto fail;
 253         }
 254
 255         status = dcerpc_binding_handle_raw_call_recv(subreq,
 256                                                      mem_ctx,
 257                                                      out_data,
 258                                                      out_length,
 259                                                      out_flags);
 260 fail:
 261         TALLOC_FREE(frame);
 262         return status;
 263 }
 264
 265 struct dcerpc_binding_handle_disconnect_state {
 266         const struct dcerpc_binding_handle_ops *ops;
 267 };
 268
 269 static void dcerpc_binding_handle_disconnect_done(struct tevent_req *subreq);
 270
 271 struct tevent_req *dcerpc_binding_handle_disconnect_send(TALLOC_CTX *mem_ctx,
 272                                                 struct tevent_context *ev,
 273                                                 struct dcerpc_binding_handle *h)
 274 {
 275         struct tevent_req *req;
 276         struct dcerpc_binding_handle_disconnect_state *state;
 277         struct tevent_req *subreq;
 278
 279         req = tevent_req_create(mem_ctx, &state,
 280                                 struct dcerpc_binding_handle_disconnect_state);
 281         if (req == NULL) {
 282                 return NULL;
 283         }
 284
 285         state->ops = h->ops;
 286
 287         subreq = state->ops->disconnect_send(state, ev, h);
 288         if (tevent_req_nomem(subreq, req)) {
 289                 return tevent_req_post(req, ev);
 290         }
 291         tevent_req_set_callback(subreq, dcerpc_binding_handle_disconnect_done, req);
 292
 293         return req;
 294 }
 295
 296 static void dcerpc_binding_handle_disconnect_done(struct tevent_req *subreq)
 297 {
 298         struct tevent_req *req = tevent_req_callback_data(subreq,
 299                                  struct tevent_req);
 300         struct dcerpc_binding_handle_disconnect_state *state =
 301                 tevent_req_data(req,
 302                 struct dcerpc_binding_handle_disconnect_state);
 303         NTSTATUS error;
 304
 305         error = state->ops->disconnect_recv(subreq);
 306         TALLOC_FREE(subreq);
 307         if (tevent_req_nterror(req, error)) {
 308                 return;
 309         }
 310
 311         tevent_req_done(req);
 312 }
 313
 314 NTSTATUS dcerpc_binding_handle_disconnect_recv(struct tevent_req *req)
 315 {
 316         NTSTATUS error;
 317
 318         if (tevent_req_is_nterror(req, &error)) {
 319                 tevent_req_received(req);
 320                 return error;
 321         }
 322
 323         tevent_req_received(req);
 324         return NT_STATUS_OK;
 325 }
 326
 327 struct dcerpc_binding_handle_call_state {
 328         struct dcerpc_binding_handle *h;
 329         const struct ndr_interface_call *call;
 330         TALLOC_CTX *r_mem;
 331         void *r_ptr;
 332         struct ndr_push *push;
 333         DATA_BLOB request;
 334         DATA_BLOB response;
 335         struct ndr_pull *pull;
 336 };
 337
 338 static void dcerpc_binding_handle_call_done(struct tevent_req *subreq);
 339
 340 struct tevent_req *dcerpc_binding_handle_call_send(TALLOC_CTX *mem_ctx,
 341                                         struct tevent_context *ev,
 342                                         struct dcerpc_binding_handle *h,
 343                                         const struct GUID *object,
 344                                         const struct ndr_interface_table *table,
 345                                         uint32_t opnum,
 346                                         TALLOC_CTX *r_mem,
 347                                         void *r_ptr)
 348 {
 349         struct tevent_req *req;
 350         struct dcerpc_binding_handle_call_state *state;
 351         struct tevent_req *subreq;
 352         enum ndr_err_code ndr_err;
 353
 354         req = tevent_req_create(mem_ctx, &state,
 355                                 struct dcerpc_binding_handle_call_state);
 356         if (req == NULL) {
 357                 return NULL;
 358         }
 359
 360 #if 0 /* TODO: activate this when the callers are fixed */
 361         if (table != h->table) {
 362                 tevent_req_nterror(req, NT_STATUS_INVALID_HANDLE);
 363                 return tevent_req_post(req, ev);
 364         }
 365 #endif
 366
 367         if (opnum >= table->num_calls) {
 368                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 369                 return tevent_req_post(req, ev);
 370         }
 371
 372         state->h = h;
 373         state->call = &table->calls[opnum];
 374
 375         state->r_mem = r_mem;
 376         state->r_ptr = r_ptr;
 377
 378         /* setup for a ndr_push_* call */
 379         state->push = ndr_push_init_ctx(state);
 380         if (tevent_req_nomem(state->push, req)) {
 381                 return tevent_req_post(req, ev);
 382         }
 383
 384         if (h->ops->ref_alloc && h->ops->ref_alloc(h)) {
 385                 state->push->flags |= LIBNDR_FLAG_REF_ALLOC;
 386         }
 387
 388         if (h->ops->push_bigendian && h->ops->push_bigendian(h)) {
 389                 state->push->flags |= LIBNDR_FLAG_BIGENDIAN;
 390         }
 391
 392         if (h->ops->use_ndr64 && h->ops->use_ndr64(h)) {
 393                 state->push->flags |= LIBNDR_FLAG_NDR64;
 394         }
 395
 396         if (h->ops->do_ndr_print) {
 397                 h->ops->do_ndr_print(h, NDR_IN | NDR_SET_VALUES,
 398                                      state->r_ptr, state->call);
 399         }
 400
 401         /* push the structure into a blob */
 402         ndr_err = state->call->ndr_push(state->push, NDR_IN, state->r_ptr);
 403         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 404                 NTSTATUS error;
 405                 error = ndr_map_error2ntstatus(ndr_err);
 406                 if (h->ops->ndr_push_failed) {
 407                         h->ops->ndr_push_failed(h, error,
 408                                                 state->r_ptr,
 409                                                 state->call);
 410                 }
 411                 tevent_req_nterror(req, error);
 412                 return tevent_req_post(req, ev);
 413         }
 414
 415         /* retrieve the blob */
 416         state->request = ndr_push_blob(state->push);
 417
 418         if (h->ops->ndr_validate_in) {
 419                 NTSTATUS error;
 420                 error = h->ops->ndr_validate_in(h, state,
 421                                                 &state->request,
 422                                                 state->call);
 423                 if (!NT_STATUS_IS_OK(error)) {
 424                         tevent_req_nterror(req, error);
 425                         return tevent_req_post(req, ev);
 426                 }
 427         }
 428
 429         subreq = dcerpc_binding_handle_raw_call_send(state, ev,
 430                                                      h, object, opnum,
 431                                                      state->push->flags,
 432                                                      state->request.data,
 433                                                      state->request.length);
 434         if (tevent_req_nomem(subreq, req)) {
 435                 return tevent_req_post(req, ev);
 436         }
 437         tevent_req_set_callback(subreq, dcerpc_binding_handle_call_done, req);
 438
 439         return req;
 440 }
 441
 442 static void dcerpc_binding_handle_call_done(struct tevent_req *subreq)
 443 {
 444         struct tevent_req *req = tevent_req_callback_data(subreq,
 445                                  struct tevent_req);
 446         struct dcerpc_binding_handle_call_state *state =
 447                 tevent_req_data(req,
 448                 struct dcerpc_binding_handle_call_state);
 449         struct dcerpc_binding_handle *h = state->h;
 450         NTSTATUS error;
 451         uint32_t out_flags = 0;
 452         enum ndr_err_code ndr_err;
 453
 454         error = dcerpc_binding_handle_raw_call_recv(subreq, state,
 455                                                     &state->response.data,
 456                                                     &state->response.length,
 457                                                     &out_flags);
 458         TALLOC_FREE(subreq);
 459         if (tevent_req_nterror(req, error)) {
 460                 return;
 461         }
 462
 463         state->pull = ndr_pull_init_blob(&state->response, state);
 464         if (tevent_req_nomem(state->pull, req)) {
 465                 return;
 466         }
 467         state->pull->flags = state->push->flags;
 468
 469         if (out_flags & LIBNDR_FLAG_BIGENDIAN) {
 470                 state->pull->flags |= LIBNDR_FLAG_BIGENDIAN;
 471         } else {
 472                 state->pull->flags &= ~LIBNDR_FLAG_BIGENDIAN;
 473         }
 474
 475         state->pull->current_mem_ctx = state->r_mem;
 476
 477         /* pull the structure from the blob */
 478         ndr_err = state->call->ndr_pull(state->pull, NDR_OUT, state->r_ptr);
 479         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 480                 error = ndr_map_error2ntstatus(ndr_err);
 481                 if (h->ops->ndr_pull_failed) {
 482                         h->ops->ndr_pull_failed(h, error,
 483                                                 &state->response,
 484                                                 state->call);
 485                 }
 486                 tevent_req_nterror(req, error);
 487                 return;
 488         }
 489
 490         if (h->ops->do_ndr_print) {
 491                 h->ops->do_ndr_print(h, NDR_OUT,
 492                                      state->r_ptr, state->call);
 493         }
 494
 495         if (h->ops->ndr_validate_out) {
 496                 error = h->ops->ndr_validate_out(h,
 497                                                  state->pull,
 498                                                  state->r_ptr,
 499                                                  state->call);
 500                 if (!NT_STATUS_IS_OK(error)) {
 501                         tevent_req_nterror(req, error);
 502                         return;
 503                 }
 504         }
 505
 506         tevent_req_done(req);
 507 }
 508
 509 NTSTATUS dcerpc_binding_handle_call_recv(struct tevent_req *req)
 510 {
 511         return tevent_req_simple_recv_ntstatus(req);
 512 }
 513
 514 NTSTATUS dcerpc_binding_handle_call(struct dcerpc_binding_handle *h,
 515                                     const struct GUID *object,
 516                                     const struct ndr_interface_table *table,
 517                                     uint32_t opnum,
 518                                     TALLOC_CTX *r_mem,
 519                                     void *r_ptr)
 520 {
 521         TALLOC_CTX *frame = talloc_stackframe();
 522         struct tevent_context *ev;
 523         struct tevent_req *subreq;
 524         NTSTATUS status = NT_STATUS_NO_MEMORY;
 525
 526         /*
 527          * TODO: allow only one sync call
 528          */
 529
 530         if (h->sync_ev) {
 531                 ev = h->sync_ev;
 532         } else {
 533                 ev = samba_tevent_context_init(frame);
 534         }
 535         if (ev == NULL) {
 536                 goto fail;
 537         }
 538
 539         subreq = dcerpc_binding_handle_call_send(frame, ev,
 540                                                  h, object, table,
 541                                                  opnum, r_mem, r_ptr);
 542         if (subreq == NULL) {
 543                 goto fail;
 544         }
 545
 546         if (!tevent_req_poll_ntstatus(subreq, ev, &status)) {
 547                 goto fail;
 548         }
 549
 550         status = dcerpc_binding_handle_call_recv(subreq);
 551 fail:
 552         TALLOC_FREE(frame);
 553         return status;
 554 }