source4/libcli/raw/rawtrans.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    raw trans/trans2/nttrans operations
   4
   5    Copyright (C) James Myers 2003 <myersjj@samba.org>
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "../lib/util/dlinklist.h"
  23 #include "libcli/raw/libcliraw.h"
  24 #include "libcli/raw/raw_proto.h"
  25
  26 #define TORTURE_TRANS_DATA 0
  27
  28 /*
  29   check out of bounds for incoming data
  30 */
  31 static bool raw_trans_oob(struct smbcli_request *req,
  32                           uint_t offset, uint_t count)
  33 {
  34         uint8_t *ptr;
  35
  36         if (count == 0) {
  37                 return false;
  38         }
  39
  40         ptr = req->in.hdr + offset;
  41
  42         /* be careful with wraparound! */
  43         if ((uintptr_t)ptr < (uintptr_t)req->in.data ||
  44             (uintptr_t)ptr >= (uintptr_t)req->in.data + req->in.data_size ||
  45             count > req->in.data_size ||
  46             (uintptr_t)ptr + count > (uintptr_t)req->in.data + req->in.data_size) {
  47                 return true;
  48         }
  49         return false;
  50 }
  51
  52 static size_t raw_trans_space_left(struct smbcli_request *req)
  53 {
  54         if (req->transport->negotiate.max_xmit <= req->out.size) {
  55                 return 0;
  56         }
  57
  58         return req->transport->negotiate.max_xmit - req->out.size;
  59 }
  60
  61 struct smb_raw_trans2_recv_state {
  62         uint8_t command;
  63         uint32_t params_total;
  64         uint32_t data_total;
  65         uint32_t params_left;
  66         uint32_t data_left;
  67         bool got_first;
  68         uint32_t recvd_data;
  69         uint32_t recvd_param;
  70         struct smb_trans2 io;
  71 };
  72
  73 NTSTATUS smb_raw_trans2_recv(struct smbcli_request *req,
  74                              TALLOC_CTX *mem_ctx,
  75                              struct smb_trans2 *parms)
  76 {
  77         struct smb_raw_trans2_recv_state *state;
  78
  79         if (!smbcli_request_receive(req) ||
  80             smbcli_request_is_error(req)) {
  81                 goto failed;
  82         }
  83
  84         state = talloc_get_type(req->recv_helper.private_data,
  85                                 struct smb_raw_trans2_recv_state);
  86
  87         parms->out = state->io.out;
  88         talloc_steal(mem_ctx, parms->out.setup);
  89         talloc_steal(mem_ctx, parms->out.params.data);
  90         talloc_steal(mem_ctx, parms->out.data.data);
  91         talloc_free(state);
  92
  93         ZERO_STRUCT(req->recv_helper);
  94
  95 failed:
  96         return smbcli_request_destroy(req);
  97 }
  98
  99 static enum smbcli_request_state smb_raw_trans2_ship_rest(struct smbcli_request *req,
 100                                                           struct smb_raw_trans2_recv_state *state);
 101
 102 /*
 103  * This helper returns SMBCLI_REQUEST_RECV until all data has arrived
 104  */
 105 static enum smbcli_request_state smb_raw_trans2_recv_helper(struct smbcli_request *req)
 106 {
 107         struct smb_raw_trans2_recv_state *state = talloc_get_type(req->recv_helper.private_data,
 108                                                   struct smb_raw_trans2_recv_state);
 109         uint16_t param_count, param_ofs, param_disp;
 110         uint16_t data_count, data_ofs, data_disp;
 111         uint16_t total_data, total_param;
 112         uint8_t setup_count;
 113
 114         /*
 115          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 116          * to a trans call. This is not an error and should not
 117          * be treated as such.
 118          */
 119         if (smbcli_request_is_error(req)) {
 120                 goto failed;
 121         }
 122
 123         if (state->params_left > 0 || state->data_left > 0) {
 124                 return smb_raw_trans2_ship_rest(req, state);
 125         }
 126
 127         SMBCLI_CHECK_MIN_WCT(req, 10);
 128
 129         total_data = SVAL(req->in.vwv, VWV(1));
 130         total_param = SVAL(req->in.vwv, VWV(0));
 131         setup_count = CVAL(req->in.vwv, VWV(9));
 132
 133         param_count = SVAL(req->in.vwv, VWV(3));
 134         param_ofs   = SVAL(req->in.vwv, VWV(4));
 135         param_disp  = SVAL(req->in.vwv, VWV(5));
 136
 137         data_count = SVAL(req->in.vwv, VWV(6));
 138         data_ofs   = SVAL(req->in.vwv, VWV(7));
 139         data_disp  = SVAL(req->in.vwv, VWV(8));
 140
 141         if (!state->got_first) {
 142                 if (total_param > 0) {
 143                         state->io.out.params = data_blob_talloc(state, NULL, total_param);
 144                         if (!state->io.out.params.data) {
 145                                 goto nomem;
 146                         }
 147                 }
 148
 149                 if (total_data > 0) {
 150                         state->io.out.data = data_blob_talloc(state, NULL, total_data);
 151                         if (!state->io.out.data.data) {
 152                                 goto nomem;
 153                         }
 154                 }
 155
 156                 if (setup_count > 0) {
 157                         uint16_t i;
 158
 159                         SMBCLI_CHECK_WCT(req, 10 + setup_count);
 160
 161                         state->io.out.setup_count = setup_count;
 162                         state->io.out.setup = talloc_array(state, uint16_t, setup_count);
 163                         if (!state->io.out.setup) {
 164                                 goto nomem;
 165                         }
 166                         for (i=0; i < setup_count; i++) {
 167                                 state->io.out.setup[i] = SVAL(req->in.vwv, VWV(10+i));
 168                         }
 169                 }
 170
 171                 state->got_first = true;
 172         }
 173
 174         if (total_data > state->io.out.data.length ||
 175             total_param > state->io.out.params.length) {
 176                 /* they must *only* shrink */
 177                 DEBUG(1,("smb_raw_trans2_recv_helper: data/params expanded!\n"));
 178                 req->status = NT_STATUS_BUFFER_TOO_SMALL;
 179                 goto failed;
 180         }
 181
 182         state->io.out.data.length = total_data;
 183         state->io.out.params.length = total_param;
 184
 185         if (data_count + data_disp > total_data ||
 186             param_count + param_disp > total_param) {
 187                 DEBUG(1,("smb_raw_trans2_recv_helper: Buffer overflow\n"));
 188                 req->status = NT_STATUS_BUFFER_TOO_SMALL;
 189                 goto failed;
 190         }
 191
 192         /* check the server isn't being nasty */
 193         if (raw_trans_oob(req, param_ofs, param_count) ||
 194             raw_trans_oob(req, data_ofs, data_count)) {
 195                 DEBUG(1,("smb_raw_trans2_recv_helper: out of bounds parameters!\n"));
 196                 req->status = NT_STATUS_BUFFER_TOO_SMALL;
 197                 goto failed;
 198         }
 199
 200         if (data_count) {
 201                 memcpy(state->io.out.data.data + data_disp,
 202                        req->in.hdr + data_ofs,
 203                        data_count);
 204         }
 205
 206         if (param_count) {
 207                 memcpy(state->io.out.params.data + param_disp,
 208                        req->in.hdr + param_ofs,
 209                        param_count);
 210         }
 211
 212         state->recvd_param += param_count;
 213         state->recvd_data += data_count;
 214
 215         if (state->recvd_data < total_data ||
 216             state->recvd_param < total_param) {
 217
 218                 /* we don't need the in buffer any more */
 219                 talloc_free(req->in.buffer);
 220                 ZERO_STRUCT(req->in);
 221
 222                 /* we still wait for more data */
 223                 DEBUG(10,("smb_raw_trans2_recv_helper: more data needed\n"));
 224                 return SMBCLI_REQUEST_RECV;
 225         }
 226
 227         DEBUG(10,("smb_raw_trans2_recv_helper: done\n"));
 228         return SMBCLI_REQUEST_DONE;
 229
 230 nomem:
 231         req->status = NT_STATUS_NO_MEMORY;
 232 failed:
 233         return SMBCLI_REQUEST_ERROR;
 234 }
 235
 236 _PUBLIC_ NTSTATUS smb_raw_trans_recv(struct smbcli_request *req,
 237                              TALLOC_CTX *mem_ctx,
 238                              struct smb_trans2 *parms)
 239 {
 240         return smb_raw_trans2_recv(req, mem_ctx, parms);
 241 }
 242
 243
 244 /*
 245   trans/trans2 raw async interface - only BLOBs used in this interface.
 246 */
 247 struct smbcli_request *smb_raw_trans_send_backend(struct smbcli_tree *tree,
 248                                                   struct smb_trans2 *parms,
 249                                                   uint8_t command)
 250 {
 251         struct smb_raw_trans2_recv_state *state;
 252         struct smbcli_request *req;
 253         int i;
 254         int padding;
 255         size_t space_left;
 256         size_t namelen = 0;
 257         DATA_BLOB params_chunk;
 258         uint16_t ofs;
 259         uint16_t params_ofs = 0;
 260         DATA_BLOB data_chunk;
 261         uint16_t data_ofs = 0;
 262
 263         if (parms->in.params.length > UINT16_MAX ||
 264             parms->in.data.length > UINT16_MAX) {
 265                 DEBUG(3,("Attempt to send invalid trans2 request (params %u, data %u)\n",
 266                          (unsigned)parms->in.params.length, (unsigned)parms->in.data.length));
 267                 return NULL;
 268         }
 269
 270
 271         if (command == SMBtrans)
 272                 padding = 1;
 273         else
 274                 padding = 3;
 275
 276         req = smbcli_request_setup(tree, command,
 277                                    14 + parms->in.setup_count,
 278                                    padding);
 279         if (!req) {
 280                 return NULL;
 281         }
 282
 283         state = talloc_zero(req, struct smb_raw_trans2_recv_state);
 284         if (!state) {
 285                 smbcli_request_destroy(req);
 286                 return NULL;
 287         }
 288
 289         state->command = command;
 290
 291         /* make sure we don't leak data via the padding */
 292         memset(req->out.data, 0, padding);
 293
 294         /* Watch out, this changes the req->out.* pointers */
 295         if (command == SMBtrans && parms->in.trans_name) {
 296                 namelen = smbcli_req_append_string(req, parms->in.trans_name,
 297                                                 STR_TERMINATE);
 298         }
 299
 300         ofs = PTR_DIFF(req->out.data,req->out.hdr)+padding+namelen;
 301
 302         /* see how much bytes of the params block we can ship in the first request */
 303         space_left = raw_trans_space_left(req);
 304
 305         params_chunk.length = MIN(parms->in.params.length, space_left);
 306         params_chunk.data = parms->in.params.data;
 307         params_ofs = ofs;
 308
 309         state->params_left = parms->in.params.length - params_chunk.length;
 310
 311         if (state->params_left > 0) {
 312                 /* we copy the whole params block, if needed we can optimize that latter */
 313                 state->io.in.params = data_blob_talloc(state, NULL, parms->in.params.length);
 314                 if (!state->io.in.params.data) {
 315                         smbcli_request_destroy(req);
 316                         return NULL;
 317                 }
 318                 memcpy(state->io.in.params.data,
 319                        parms->in.params.data,
 320                        parms->in.params.length);
 321         }
 322
 323         /* see how much bytes of the data block we can ship in the first request */
 324         space_left -= params_chunk.length;
 325
 326 #if TORTURE_TRANS_DATA
 327         if (space_left > 1) {
 328                 space_left /= 2;
 329         }
 330 #endif
 331
 332         data_chunk.length = MIN(parms->in.data.length, space_left);
 333         data_chunk.data = parms->in.data.data;
 334         data_ofs = params_ofs + params_chunk.length;
 335
 336         state->data_left = parms->in.data.length - data_chunk.length;
 337
 338         if (state->data_left > 0) {
 339                 /* we copy the whole params block, if needed we can optimize that latter */
 340                 state->io.in.data = data_blob_talloc(state, NULL, parms->in.data.length);
 341                 if (!state->io.in.data.data) {
 342                         smbcli_request_destroy(req);
 343                         return NULL;
 344                 }
 345                 memcpy(state->io.in.data.data,
 346                        parms->in.data.data,
 347                        parms->in.data.length);
 348         }
 349
 350         state->params_total = parms->in.params.length;
 351         state->data_total = parms->in.data.length;
 352
 353         /* primary request */
 354         SSVAL(req->out.vwv,VWV(0),parms->in.params.length);
 355         SSVAL(req->out.vwv,VWV(1),parms->in.data.length);
 356         SSVAL(req->out.vwv,VWV(2),parms->in.max_param);
 357         SSVAL(req->out.vwv,VWV(3),parms->in.max_data);
 358         SCVAL(req->out.vwv,VWV(4),parms->in.max_setup);
 359         SCVAL(req->out.vwv,VWV(4)+1,0); /* reserved */
 360         SSVAL(req->out.vwv,VWV(5),parms->in.flags);
 361         SIVAL(req->out.vwv,VWV(6),parms->in.timeout);
 362         SSVAL(req->out.vwv,VWV(8),0); /* reserved */
 363         SSVAL(req->out.vwv,VWV(9),params_chunk.length);
 364         SSVAL(req->out.vwv,VWV(10),params_ofs);
 365         SSVAL(req->out.vwv,VWV(11),data_chunk.length);
 366         SSVAL(req->out.vwv,VWV(12),data_ofs);
 367         SCVAL(req->out.vwv,VWV(13),parms->in.setup_count);
 368         SCVAL(req->out.vwv,VWV(13)+1,0); /* reserved */
 369         for (i=0;i<parms->in.setup_count;i++)   {
 370                 SSVAL(req->out.vwv,VWV(14)+VWV(i),parms->in.setup[i]);
 371         }
 372         smbcli_req_append_blob(req, &params_chunk);
 373         smbcli_req_append_blob(req, &data_chunk);
 374
 375         /* add the helper which will check that all multi-part replies are
 376            in before an async client callack will be issued */
 377         req->recv_helper.fn = smb_raw_trans2_recv_helper;
 378         req->recv_helper.private_data = state;
 379
 380         if (!smbcli_request_send(req)) {
 381                 smbcli_request_destroy(req);
 382                 return NULL;
 383         }
 384
 385         return req;
 386 }
 387
 388 static enum smbcli_request_state smb_raw_trans2_ship_next(struct smbcli_request *req,
 389                                                           struct smb_raw_trans2_recv_state *state)
 390 {
 391         struct smbcli_request *req2;
 392         size_t space_left;
 393         DATA_BLOB params_chunk;
 394         uint16_t ofs;
 395         uint16_t params_ofs = 0;
 396         uint16_t params_disp = 0;
 397         DATA_BLOB data_chunk;
 398         uint16_t data_ofs = 0;
 399         uint16_t data_disp = 0;
 400         uint8_t wct;
 401
 402         if (state->command == SMBtrans2) {
 403                 wct = 9;
 404         } else {
 405                 wct = 8;
 406         }
 407
 408         req2 = smbcli_request_setup(req->tree, state->command+1, wct, 0);
 409         if (!req2) {
 410                 goto nomem;
 411         }
 412         req2->mid = req->mid;
 413         SSVAL(req2->out.hdr, HDR_MID, req2->mid);
 414
 415         ofs = PTR_DIFF(req2->out.data,req2->out.hdr);
 416
 417         /* see how much bytes of the params block we can ship in the first request */
 418         space_left = raw_trans_space_left(req2);
 419
 420         params_disp = state->io.in.params.length - state->params_left;
 421         params_chunk.length = MIN(state->params_left, space_left);
 422         params_chunk.data = state->io.in.params.data + params_disp;
 423         params_ofs = ofs;
 424
 425         state->params_left -= params_chunk.length;
 426
 427         /* see how much bytes of the data block we can ship in the first request */
 428         space_left -= params_chunk.length;
 429
 430 #if TORTURE_TRANS_DATA
 431         if (space_left > 1) {
 432                 space_left /= 2;
 433         }
 434 #endif
 435
 436         data_disp = state->io.in.data.length - state->data_left;
 437         data_chunk.length = MIN(state->data_left, space_left);
 438         data_chunk.data = state->io.in.data.data + data_disp;
 439         data_ofs = params_ofs+params_chunk.length;
 440
 441         state->data_left -= data_chunk.length;
 442
 443         SSVAL(req2->out.vwv,VWV(0), state->params_total);
 444         SSVAL(req2->out.vwv,VWV(1), state->data_total);
 445         SSVAL(req2->out.vwv,VWV(2), params_chunk.length);
 446         SSVAL(req2->out.vwv,VWV(3), params_ofs);
 447         SSVAL(req2->out.vwv,VWV(4), params_disp);
 448         SSVAL(req2->out.vwv,VWV(5), data_chunk.length);
 449         SSVAL(req2->out.vwv,VWV(6), data_ofs);
 450         SSVAL(req2->out.vwv,VWV(7), data_disp);
 451         if (wct == 9) {
 452                 SSVAL(req2->out.vwv,VWV(8), 0xFFFF);
 453         }
 454
 455         smbcli_req_append_blob(req2, &params_chunk);
 456         smbcli_req_append_blob(req2, &data_chunk);
 457
 458         /*
 459          * it's a one way request but we need
 460          * the seq_num, so we destroy req2 by hand
 461          */
 462         if (!smbcli_request_send(req2)) {
 463                 goto failed;
 464         }
 465
 466         req->seq_num = req2->seq_num;
 467         smbcli_request_destroy(req2);
 468
 469         return SMBCLI_REQUEST_RECV;
 470
 471 nomem:
 472         req->status = NT_STATUS_NO_MEMORY;
 473 failed:
 474         if (req2) {
 475                 req->status = smbcli_request_destroy(req2);
 476         }
 477         return SMBCLI_REQUEST_ERROR;
 478 }
 479
 480 static enum smbcli_request_state smb_raw_trans2_ship_rest(struct smbcli_request *req,
 481                                                           struct smb_raw_trans2_recv_state *state)
 482 {
 483         enum smbcli_request_state ret = SMBCLI_REQUEST_ERROR;
 484
 485         while (state->params_left > 0 || state->data_left > 0) {
 486                 ret = smb_raw_trans2_ship_next(req, state);
 487                 if (ret != SMBCLI_REQUEST_RECV) {
 488                         break;
 489                 }
 490         }
 491
 492         return ret;
 493 }
 494
 495
 496 /*
 497   trans/trans2 raw async interface - only BLOBs used in this interface.
 498   note that this doesn't yet support multi-part requests
 499 */
 500 _PUBLIC_ struct smbcli_request *smb_raw_trans_send(struct smbcli_tree *tree,
 501                                        struct smb_trans2 *parms)
 502 {
 503         return smb_raw_trans_send_backend(tree, parms, SMBtrans);
 504 }
 505
 506 struct smbcli_request *smb_raw_trans2_send(struct smbcli_tree *tree,
 507                                        struct smb_trans2 *parms)
 508 {
 509         return smb_raw_trans_send_backend(tree, parms, SMBtrans2);
 510 }
 511
 512 /*
 513   trans2 synchronous blob interface
 514 */
 515 NTSTATUS smb_raw_trans2(struct smbcli_tree *tree,
 516                         TALLOC_CTX *mem_ctx,
 517                         struct smb_trans2 *parms)
 518 {
 519         struct smbcli_request *req;
 520         req = smb_raw_trans2_send(tree, parms);
 521         if (!req) return NT_STATUS_UNSUCCESSFUL;
 522         return smb_raw_trans2_recv(req, mem_ctx, parms);
 523 }
 524
 525
 526 /*
 527   trans synchronous blob interface
 528 */
 529 _PUBLIC_ NTSTATUS smb_raw_trans(struct smbcli_tree *tree,
 530                        TALLOC_CTX *mem_ctx,
 531                        struct smb_trans2 *parms)
 532 {
 533         struct smbcli_request *req;
 534         req = smb_raw_trans_send(tree, parms);
 535         if (!req) return NT_STATUS_UNSUCCESSFUL;
 536         return smb_raw_trans_recv(req, mem_ctx, parms);
 537 }
 538
 539 struct smb_raw_nttrans_recv_state {
 540         uint32_t params_total;
 541         uint32_t data_total;
 542         uint32_t params_left;
 543         uint32_t data_left;
 544         bool got_first;
 545         uint32_t recvd_data;
 546         uint32_t recvd_param;
 547         struct smb_nttrans io;
 548 };
 549
 550 NTSTATUS smb_raw_nttrans_recv(struct smbcli_request *req,
 551                               TALLOC_CTX *mem_ctx,
 552                               struct smb_nttrans *parms)
 553 {
 554         struct smb_raw_nttrans_recv_state *state;
 555
 556         if (!smbcli_request_receive(req) ||
 557             smbcli_request_is_error(req)) {
 558                 goto failed;
 559         }
 560
 561         state = talloc_get_type(req->recv_helper.private_data,
 562                                 struct smb_raw_nttrans_recv_state);
 563
 564         parms->out = state->io.out;
 565         talloc_steal(mem_ctx, parms->out.setup);
 566         talloc_steal(mem_ctx, parms->out.params.data);
 567         talloc_steal(mem_ctx, parms->out.data.data);
 568         talloc_free(state);
 569
 570         ZERO_STRUCT(req->recv_helper);
 571
 572 failed:
 573         return smbcli_request_destroy(req);
 574 }
 575
 576 static enum smbcli_request_state smb_raw_nttrans_ship_rest(struct smbcli_request *req,
 577                                                            struct smb_raw_nttrans_recv_state *state);
 578
 579 /*
 580  * This helper returns SMBCLI_REQUEST_RECV until all data has arrived
 581  */
 582 static enum smbcli_request_state smb_raw_nttrans_recv_helper(struct smbcli_request *req)
 583 {
 584         struct smb_raw_nttrans_recv_state *state = talloc_get_type(req->recv_helper.private_data,
 585                                                    struct smb_raw_nttrans_recv_state);
 586         uint32_t param_count, param_ofs, param_disp;
 587         uint32_t data_count, data_ofs, data_disp;
 588         uint32_t total_data, total_param;
 589         uint8_t setup_count;
 590
 591         /*
 592          * An NT RPC pipe call can return ERRDOS, ERRmoredata
 593          * to a trans call. This is not an error and should not
 594          * be treated as such.
 595          */
 596         if (smbcli_request_is_error(req)) {
 597                 goto failed;
 598         }
 599
 600         /* sanity check */
 601         if (CVAL(req->in.hdr, HDR_COM) != SMBnttrans) {
 602                 DEBUG(0,("smb_raw_nttrans_recv_helper: Expected %s response, got command 0x%02x\n",
 603                          "SMBnttrans",
 604                          CVAL(req->in.hdr,HDR_COM)));
 605                 req->status = NT_STATUS_INVALID_NETWORK_RESPONSE;
 606                 goto failed;
 607         }
 608
 609         if (state->params_left > 0 || state->data_left > 0) {
 610                 return smb_raw_nttrans_ship_rest(req, state);
 611         }
 612
 613         /* this is the first packet of the response */
 614         SMBCLI_CHECK_MIN_WCT(req, 18);
 615
 616         total_param = IVAL(req->in.vwv, 3);
 617         total_data  = IVAL(req->in.vwv, 7);
 618         setup_count = CVAL(req->in.vwv, 35);
 619
 620         param_count = IVAL(req->in.vwv, 11);
 621         param_ofs   = IVAL(req->in.vwv, 15);
 622         param_disp  = IVAL(req->in.vwv, 19);
 623
 624         data_count = IVAL(req->in.vwv, 23);
 625         data_ofs   = IVAL(req->in.vwv, 27);
 626         data_disp  = IVAL(req->in.vwv, 31);
 627
 628         if (!state->got_first) {
 629                 if (total_param > 0) {
 630                         state->io.out.params = data_blob_talloc(state, NULL, total_param);
 631                         if (!state->io.out.params.data) {
 632                                 goto nomem;
 633                         }
 634                 }
 635
 636                 if (total_data > 0) {
 637                         state->io.out.data = data_blob_talloc(state, NULL, total_data);
 638                         if (!state->io.out.data.data) {
 639                                 goto nomem;
 640                         }
 641                 }
 642
 643                 if (setup_count > 0) {
 644                         SMBCLI_CHECK_WCT(req, 18 + setup_count);
 645
 646                         state->io.out.setup_count = setup_count;
 647                         state->io.out.setup = talloc_array(state, uint8_t,
 648                                                            setup_count * VWV(1));
 649                         if (!state->io.out.setup) {
 650                                 goto nomem;
 651                         }
 652                         memcpy(state->io.out.setup, (uint8_t *)req->out.vwv + VWV(18),
 653                                setup_count * VWV(1));
 654                 }
 655
 656                 state->got_first = true;
 657         }
 658
 659         if (total_data > state->io.out.data.length ||
 660             total_param > state->io.out.params.length) {
 661                 /* they must *only* shrink */
 662                 DEBUG(1,("smb_raw_nttrans_recv_helper: data/params expanded!\n"));
 663                 req->status = NT_STATUS_BUFFER_TOO_SMALL;
 664                 goto failed;
 665         }
 666
 667         state->io.out.data.length = total_data;
 668         state->io.out.params.length = total_param;
 669
 670         if (data_count + data_disp > total_data ||
 671             param_count + param_disp > total_param) {
 672                 DEBUG(1,("smb_raw_nttrans_recv_helper: Buffer overflow\n"));
 673                 req->status = NT_STATUS_BUFFER_TOO_SMALL;
 674                 goto failed;
 675         }
 676
 677         /* check the server isn't being nasty */
 678         if (raw_trans_oob(req, param_ofs, param_count) ||
 679             raw_trans_oob(req, data_ofs, data_count)) {
 680                 DEBUG(1,("smb_raw_nttrans_recv_helper: out of bounds parameters!\n"));
 681                 req->status = NT_STATUS_BUFFER_TOO_SMALL;
 682                 goto failed;
 683         }
 684
 685         if (data_count) {
 686                 memcpy(state->io.out.data.data + data_disp,
 687                        req->in.hdr + data_ofs,
 688                        data_count);
 689         }
 690
 691         if (param_count) {
 692                 memcpy(state->io.out.params.data + param_disp,
 693                        req->in.hdr + param_ofs,
 694                        param_count);
 695         }
 696
 697         state->recvd_param += param_count;
 698         state->recvd_data += data_count;
 699
 700         if (state->recvd_data < total_data ||
 701             state->recvd_param < total_param) {
 702
 703                 /* we don't need the in buffer any more */
 704                 talloc_free(req->in.buffer);
 705                 ZERO_STRUCT(req->in);
 706
 707                 /* we still wait for more data */
 708                 DEBUG(10,("smb_raw_nttrans_recv_helper: more data needed\n"));
 709                 return SMBCLI_REQUEST_RECV;
 710         }
 711
 712         DEBUG(10,("smb_raw_nttrans_recv_helper: done\n"));
 713         return SMBCLI_REQUEST_DONE;
 714
 715 nomem:
 716         req->status = NT_STATUS_NO_MEMORY;
 717 failed:
 718         return SMBCLI_REQUEST_ERROR;
 719 }
 720
 721 /****************************************************************************
 722  nttrans raw - only BLOBs used in this interface.
 723  at the moment we only handle a single primary request
 724 ****************************************************************************/
 725 struct smbcli_request *smb_raw_nttrans_send(struct smbcli_tree *tree,
 726                                          struct smb_nttrans *parms)
 727 {
 728         struct smbcli_request *req;
 729         struct smb_raw_nttrans_recv_state *state;
 730         uint32_t ofs;
 731         size_t space_left;
 732         DATA_BLOB params_chunk;
 733         uint32_t params_ofs;
 734         DATA_BLOB data_chunk;
 735         uint32_t data_ofs;
 736         int align = 0;
 737
 738         /* only align if there are parameters or data */
 739         if (parms->in.params.length || parms->in.data.length) {
 740                 align = 3;
 741         }
 742
 743         req = smbcli_request_setup(tree, SMBnttrans,
 744                                 19 + parms->in.setup_count, align);
 745         if (!req) {
 746                 return NULL;
 747         }
 748
 749         state = talloc_zero(req, struct smb_raw_nttrans_recv_state);
 750         if (!state) {
 751                 talloc_free(req);
 752                 return NULL;
 753         }
 754
 755         /* fill in SMB parameters */
 756
 757         if (align != 0) {
 758                 memset(req->out.data, 0, align);
 759         }
 760
 761         ofs = PTR_DIFF(req->out.data,req->out.hdr)+align;
 762
 763         /* see how much bytes of the params block we can ship in the first request */
 764         space_left = raw_trans_space_left(req);
 765
 766         params_chunk.length = MIN(parms->in.params.length, space_left);
 767         params_chunk.data = parms->in.params.data;
 768         params_ofs = ofs;
 769
 770         state->params_left = parms->in.params.length - params_chunk.length;
 771
 772         if (state->params_left > 0) {
 773                 /* we copy the whole params block, if needed we can optimize that latter */
 774                 state->io.in.params = data_blob_talloc(state, NULL, parms->in.params.length);
 775                 if (!state->io.in.params.data) {
 776                         smbcli_request_destroy(req);
 777                         return NULL;
 778                 }
 779                 memcpy(state->io.in.params.data,
 780                        parms->in.params.data,
 781                        parms->in.params.length);
 782         }
 783
 784         /* see how much bytes of the data block we can ship in the first request */
 785         space_left -= params_chunk.length;
 786
 787 #if TORTURE_TRANS_DATA
 788         if (space_left > 1) {
 789                 space_left /= 2;
 790         }
 791 #endif
 792
 793         data_chunk.length = MIN(parms->in.data.length, space_left);
 794         data_chunk.data = parms->in.data.data;
 795         data_ofs = params_ofs + params_chunk.length;
 796
 797         state->data_left = parms->in.data.length - data_chunk.length;
 798
 799         if (state->data_left > 0) {
 800                 /* we copy the whole params block, if needed we can optimize that latter */
 801                 state->io.in.data = data_blob_talloc(state, NULL, parms->in.data.length);
 802                 if (!state->io.in.data.data) {
 803                         smbcli_request_destroy(req);
 804                         return NULL;
 805                 }
 806                 memcpy(state->io.in.data.data,
 807                        parms->in.data.data,
 808                        parms->in.data.length);
 809         }
 810
 811         state->params_total = parms->in.params.length;
 812         state->data_total = parms->in.data.length;
 813
 814         SCVAL(req->out.vwv,  0, parms->in.max_setup);
 815         SSVAL(req->out.vwv,  1, 0); /* reserved */
 816         SIVAL(req->out.vwv,  3, parms->in.params.length);
 817         SIVAL(req->out.vwv,  7, parms->in.data.length);
 818         SIVAL(req->out.vwv, 11, parms->in.max_param);
 819         SIVAL(req->out.vwv, 15, parms->in.max_data);
 820         SIVAL(req->out.vwv, 19, params_chunk.length);
 821         SIVAL(req->out.vwv, 23, params_ofs);
 822         SIVAL(req->out.vwv, 27, data_chunk.length);
 823         SIVAL(req->out.vwv, 31, data_ofs);
 824         SCVAL(req->out.vwv, 35, parms->in.setup_count);
 825         SSVAL(req->out.vwv, 36, parms->in.function);
 826         memcpy(req->out.vwv + VWV(19), parms->in.setup,
 827                sizeof(uint16_t) * parms->in.setup_count);
 828
 829         smbcli_req_append_blob(req, &params_chunk);
 830         smbcli_req_append_blob(req, &data_chunk);
 831
 832         /* add the helper which will check that all multi-part replies are
 833            in before an async client callack will be issued */
 834         req->recv_helper.fn = smb_raw_nttrans_recv_helper;
 835         req->recv_helper.private_data = state;
 836
 837         if (!smbcli_request_send(req)) {
 838                 smbcli_request_destroy(req);
 839                 return NULL;
 840         }
 841
 842         return req;
 843 }
 844
 845 static enum smbcli_request_state smb_raw_nttrans_ship_next(struct smbcli_request *req,
 846                                                            struct smb_raw_nttrans_recv_state *state)
 847 {
 848         struct smbcli_request *req2;
 849         size_t space_left;
 850         DATA_BLOB params_chunk;
 851         uint32_t ofs;
 852         uint32_t params_ofs = 0;
 853         uint32_t params_disp = 0;
 854         DATA_BLOB data_chunk;
 855         uint32_t data_ofs = 0;
 856         uint32_t data_disp = 0;
 857
 858         req2 = smbcli_request_setup(req->tree, SMBnttranss, 18, 0);
 859         if (!req2) {
 860                 goto nomem;
 861         }
 862         req2->mid = req->mid;
 863         SSVAL(req2->out.hdr, HDR_MID, req2->mid);
 864
 865         ofs = PTR_DIFF(req2->out.data,req2->out.hdr);
 866
 867         /* see how much bytes of the params block we can ship in the first request */
 868         space_left = raw_trans_space_left(req2);
 869
 870         params_disp = state->io.in.params.length - state->params_left;
 871         params_chunk.length = MIN(state->params_left, space_left);
 872         params_chunk.data = state->io.in.params.data + params_disp;
 873         params_ofs = ofs;
 874
 875         state->params_left -= params_chunk.length;
 876
 877         /* see how much bytes of the data block we can ship in the first request */
 878         space_left -= params_chunk.length;
 879
 880 #if TORTURE_TRANS_DATA
 881         if (space_left > 1) {
 882                 space_left /= 2;
 883         }
 884 #endif
 885
 886         data_disp = state->io.in.data.length - state->data_left;
 887         data_chunk.length = MIN(state->data_left, space_left);
 888         data_chunk.data = state->io.in.data.data + data_disp;
 889         data_ofs = params_ofs+params_chunk.length;
 890
 891         state->data_left -= data_chunk.length;
 892
 893         SSVAL(req2->out.vwv,0, 0); /* reserved */
 894         SCVAL(req2->out.vwv,2, 0); /* reserved */
 895         SIVAL(req2->out.vwv,3, state->params_total);
 896         SIVAL(req2->out.vwv,7, state->data_total);
 897         SIVAL(req2->out.vwv,11, params_chunk.length);
 898         SIVAL(req2->out.vwv,15, params_ofs);
 899         SIVAL(req2->out.vwv,19, params_disp);
 900         SIVAL(req2->out.vwv,23, data_chunk.length);
 901         SIVAL(req2->out.vwv,27, data_ofs);
 902         SIVAL(req2->out.vwv,31, data_disp);
 903         SCVAL(req2->out.vwv,35, 0); /* reserved */
 904
 905         smbcli_req_append_blob(req2, &params_chunk);
 906         smbcli_req_append_blob(req2, &data_chunk);
 907
 908         /*
 909          * it's a one way request but we need
 910          * the seq_num, so we destroy req2 by hand
 911          */
 912         if (!smbcli_request_send(req2)) {
 913                 goto failed;
 914         }
 915
 916         req->seq_num = req2->seq_num;
 917         smbcli_request_destroy(req2);
 918
 919         return SMBCLI_REQUEST_RECV;
 920
 921 nomem:
 922         req->status = NT_STATUS_NO_MEMORY;
 923 failed:
 924         if (req2) {
 925                 req->status = smbcli_request_destroy(req2);
 926         }
 927         return SMBCLI_REQUEST_ERROR;
 928 }
 929
 930 static enum smbcli_request_state smb_raw_nttrans_ship_rest(struct smbcli_request *req,
 931                                                            struct smb_raw_nttrans_recv_state *state)
 932 {
 933         enum smbcli_request_state ret = SMBCLI_REQUEST_ERROR;
 934
 935         while (state->params_left > 0 || state->data_left > 0) {
 936                 ret = smb_raw_nttrans_ship_next(req, state);
 937                 if (ret != SMBCLI_REQUEST_RECV) {
 938                         break;
 939                 }
 940         }
 941
 942         return ret;
 943 }
 944
 945
 946 /****************************************************************************
 947   receive a SMB nttrans response allocating the necessary memory
 948   ****************************************************************************/
 949 NTSTATUS smb_raw_nttrans(struct smbcli_tree *tree,
 950                          TALLOC_CTX *mem_ctx,
 951                          struct smb_nttrans *parms)
 952 {
 953         struct smbcli_request *req;
 954
 955         req = smb_raw_nttrans_send(tree, parms);
 956         if (!req) {
 957                 return NT_STATUS_UNSUCCESSFUL;
 958         }
 959
 960         return smb_raw_nttrans_recv(req, mem_ctx, parms);
 961 }