source3/libsmb/clitrans.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    client transaction calls
   4    Copyright (C) Andrew Tridgell 1994-1998
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "libsmb/libsmb.h"
  22 #include "../lib/util/tevent_ntstatus.h"
  23 #include "async_smb.h"
  24
  25 struct trans_recvblob {
  26         uint8_t *data;
  27         uint32_t max, total, received;
  28 };
  29
  30 struct cli_trans_state {
  31         struct cli_state *cli;
  32         struct tevent_context *ev;
  33         uint8_t cmd;
  34         uint16_t mid;
  35         const char *pipe_name;
  36         uint8_t *pipe_name_conv;
  37         size_t pipe_name_conv_len;
  38         uint16_t fid;
  39         uint16_t function;
  40         int flags;
  41         uint16_t *setup;
  42         uint8_t num_setup, max_setup;
  43         uint8_t *param;
  44         uint32_t num_param, param_sent;
  45         uint8_t *data;
  46         uint32_t num_data, data_sent;
  47
  48         uint8_t num_rsetup;
  49         uint16_t *rsetup;
  50         struct trans_recvblob rparam;
  51         struct trans_recvblob rdata;
  52         uint16_t recv_flags2;
  53
  54         struct iovec iov[6];
  55         uint8_t pad[4];
  56         uint8_t zero_pad[4];
  57         uint16_t vwv[32];
  58
  59         struct tevent_req *primary_subreq;
  60 };
  61
  62 static void cli_trans_cleanup_primary(struct cli_trans_state *state)
  63 {
  64         if (state->primary_subreq) {
  65                 cli_smb_req_set_mid(state->primary_subreq, 0);
  66                 cli_smb_req_unset_pending(state->primary_subreq);
  67                 TALLOC_FREE(state->primary_subreq);
  68         }
  69 }
  70
  71 static int cli_trans_state_destructor(struct cli_trans_state *state)
  72 {
  73         cli_trans_cleanup_primary(state);
  74         return 0;
  75 }
  76
  77 static NTSTATUS cli_pull_trans(uint8_t *inbuf,
  78                                uint8_t wct, uint16_t *vwv,
  79                                uint16_t num_bytes, uint8_t *bytes,
  80                                uint8_t smb_cmd, bool expect_first_reply,
  81                                uint8_t *pnum_setup, uint16_t **psetup,
  82                                uint32_t *ptotal_param, uint32_t *pnum_param,
  83                                uint32_t *pparam_disp, uint8_t **pparam,
  84                                uint32_t *ptotal_data, uint32_t *pnum_data,
  85                                uint32_t *pdata_disp, uint8_t **pdata)
  86 {
  87         uint32_t param_ofs, data_ofs;
  88
  89         if (expect_first_reply) {
  90                 if ((wct != 0) || (num_bytes != 0)) {
  91                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
  92                 }
  93                 return NT_STATUS_OK;
  94         }
  95
  96         switch (smb_cmd) {
  97         case SMBtrans:
  98         case SMBtrans2:
  99                 if (wct < 10) {
 100                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
 101                 }
 102                 *ptotal_param   = SVAL(vwv + 0, 0);
 103                 *ptotal_data    = SVAL(vwv + 1, 0);
 104                 *pnum_param     = SVAL(vwv + 3, 0);
 105                 param_ofs       = SVAL(vwv + 4, 0);
 106                 *pparam_disp    = SVAL(vwv + 5, 0);
 107                 *pnum_data      = SVAL(vwv + 6, 0);
 108                 data_ofs        = SVAL(vwv + 7, 0);
 109                 *pdata_disp     = SVAL(vwv + 8, 0);
 110                 *pnum_setup     = CVAL(vwv + 9, 0);
 111                 if (wct < 10 + (*pnum_setup)) {
 112                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
 113                 }
 114                 *psetup = vwv + 10;
 115
 116                 break;
 117         case SMBnttrans:
 118                 if (wct < 18) {
 119                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
 120                 }
 121                 *ptotal_param   = IVAL(vwv, 3);
 122                 *ptotal_data    = IVAL(vwv, 7);
 123                 *pnum_param     = IVAL(vwv, 11);
 124                 param_ofs       = IVAL(vwv, 15);
 125                 *pparam_disp    = IVAL(vwv, 19);
 126                 *pnum_data      = IVAL(vwv, 23);
 127                 data_ofs        = IVAL(vwv, 27);
 128                 *pdata_disp     = IVAL(vwv, 31);
 129                 *pnum_setup     = CVAL(vwv, 35);
 130                 *psetup         = vwv + 18;
 131                 break;
 132
 133         default:
 134                 return NT_STATUS_INTERNAL_ERROR;
 135         }
 136
 137         /*
 138          * Check for buffer overflows. data_ofs needs to be checked against
 139          * the incoming buffer length, data_disp against the total
 140          * length. Likewise for param_ofs/param_disp.
 141          */
 142
 143         if (smb_buffer_oob(smb_len_nbt(inbuf), param_ofs, *pnum_param)
 144             || smb_buffer_oob(*ptotal_param, *pparam_disp, *pnum_param)
 145             || smb_buffer_oob(smb_len_nbt(inbuf), data_ofs, *pnum_data)
 146             || smb_buffer_oob(*ptotal_data, *pdata_disp, *pnum_data)) {
 147                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
 148         }
 149
 150         *pparam = (uint8_t *)inbuf + 4 + param_ofs;
 151         *pdata = (uint8_t *)inbuf + 4 + data_ofs;
 152
 153         return NT_STATUS_OK;
 154 }
 155
 156 static NTSTATUS cli_trans_pull_blob(TALLOC_CTX *mem_ctx,
 157                                     struct trans_recvblob *blob,
 158                                     uint32_t total, uint32_t thistime,
 159                                     uint8_t *buf, uint32_t displacement)
 160 {
 161         if (blob->data == NULL) {
 162                 if (total > blob->max) {
 163                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
 164                 }
 165                 blob->total = total;
 166                 blob->data = talloc_array(mem_ctx, uint8_t, total);
 167                 if (blob->data == NULL) {
 168                         return NT_STATUS_NO_MEMORY;
 169                 }
 170         }
 171
 172         if (total > blob->total) {
 173                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
 174         }
 175
 176         if (thistime) {
 177                 memcpy(blob->data + displacement, buf, thistime);
 178                 blob->received += thistime;
 179         }
 180
 181         return NT_STATUS_OK;
 182 }
 183
 184 static void cli_trans_format(struct cli_trans_state *state, uint8_t *pwct,
 185                              int *piov_count)
 186 {
 187         struct cli_state *cli = state->cli;
 188         uint8_t wct = 0;
 189         struct iovec *iov = state->iov;
 190         uint8_t *pad = state->pad;
 191         uint16_t *vwv = state->vwv;
 192         uint32_t param_offset;
 193         uint32_t this_param = 0;
 194         uint32_t param_pad;
 195         uint32_t data_offset;
 196         uint32_t this_data = 0;
 197         uint32_t data_pad;
 198         uint32_t useable_space;
 199         uint8_t cmd;
 200
 201         cmd = state->cmd;
 202
 203         if ((state->param_sent != 0) || (state->data_sent != 0)) {
 204                 /* The secondary commands are one after the primary ones */
 205                 cmd += 1;
 206         }
 207
 208         param_offset = MIN_SMB_SIZE;
 209
 210         switch (cmd) {
 211         case SMBtrans:
 212                 pad[0] = 0;
 213                 iov[0].iov_base = (void *)pad;
 214                 iov[0].iov_len = 1;
 215                 iov[1].iov_base = (void *)state->pipe_name_conv;
 216                 iov[1].iov_len = state->pipe_name_conv_len;
 217                 wct = 14 + state->num_setup;
 218                 param_offset += iov[0].iov_len + iov[1].iov_len;
 219                 iov += 2;
 220                 break;
 221         case SMBtrans2:
 222                 pad[0] = 0;
 223                 pad[1] = 'D'; /* Copy this from "old" 3.0 behaviour */
 224                 pad[2] = ' ';
 225                 iov[0].iov_base = (void *)pad;
 226                 iov[0].iov_len = 3;
 227                 wct = 14 + state->num_setup;
 228                 param_offset += 3;
 229                 iov += 1;
 230                 break;
 231         case SMBtranss:
 232                 wct = 8;
 233                 break;
 234         case SMBtranss2:
 235                 wct = 9;
 236                 break;
 237         case SMBnttrans:
 238                 wct = 19 + state->num_setup;
 239                 break;
 240         case SMBnttranss:
 241                 wct = 18;
 242                 break;
 243         }
 244
 245         param_offset += wct * sizeof(uint16_t);
 246         useable_space = cli_state_available_size(cli, param_offset);
 247
 248         param_pad = param_offset % 4;
 249         if (param_pad > 0) {
 250                 param_pad = MIN(param_pad, useable_space);
 251                 iov[0].iov_base = (void *)state->zero_pad;
 252                 iov[0].iov_len = param_pad;
 253                 iov += 1;
 254                 param_offset += param_pad;
 255         }
 256         useable_space = cli_state_available_size(cli, param_offset);
 257
 258         if (state->param_sent < state->num_param) {
 259                 this_param = MIN(state->num_param - state->param_sent,
 260                                  useable_space);
 261                 iov[0].iov_base = (void *)(state->param + state->param_sent);
 262                 iov[0].iov_len = this_param;
 263                 iov += 1;
 264         }
 265
 266         data_offset = param_offset + this_param;
 267         useable_space = cli_state_available_size(cli, data_offset);
 268
 269         data_pad = data_offset % 4;
 270         if (data_pad > 0) {
 271                 data_pad = MIN(data_pad, useable_space);
 272                 iov[0].iov_base = (void *)state->zero_pad;
 273                 iov[0].iov_len = data_pad;
 274                 iov += 1;
 275                 data_offset += data_pad;
 276         }
 277         useable_space = cli_state_available_size(cli, data_offset);
 278
 279         if (state->data_sent < state->num_data) {
 280                 this_data = MIN(state->num_data - state->data_sent,
 281                                 useable_space);
 282                 iov[0].iov_base = (void *)(state->data + state->data_sent);
 283                 iov[0].iov_len = this_data;
 284                 iov += 1;
 285         }
 286
 287         DEBUG(10, ("num_setup=%u, max_setup=%u, "
 288                    "param_total=%u, this_param=%u, max_param=%u, "
 289                    "data_total=%u, this_data=%u, max_data=%u, "
 290                    "param_offset=%u, param_pad=%u, param_disp=%u, "
 291                    "data_offset=%u, data_pad=%u, data_disp=%u\n",
 292                    (unsigned)state->num_setup, (unsigned)state->max_setup,
 293                    (unsigned)state->num_param, (unsigned)this_param,
 294                    (unsigned)state->rparam.max,
 295                    (unsigned)state->num_data, (unsigned)this_data,
 296                    (unsigned)state->rdata.max,
 297                    (unsigned)param_offset, (unsigned)param_pad,
 298                    (unsigned)state->param_sent,
 299                    (unsigned)data_offset, (unsigned)data_pad,
 300                    (unsigned)state->data_sent));
 301
 302         switch (cmd) {
 303         case SMBtrans:
 304         case SMBtrans2:
 305                 SSVAL(vwv + 0, 0, state->num_param);
 306                 SSVAL(vwv + 1, 0, state->num_data);
 307                 SSVAL(vwv + 2, 0, state->rparam.max);
 308                 SSVAL(vwv + 3, 0, state->rdata.max);
 309                 SCVAL(vwv + 4, 0, state->max_setup);
 310                 SCVAL(vwv + 4, 1, 0);   /* reserved */
 311                 SSVAL(vwv + 5, 0, state->flags);
 312                 SIVAL(vwv + 6, 0, 0);   /* timeout */
 313                 SSVAL(vwv + 8, 0, 0);   /* reserved */
 314                 SSVAL(vwv + 9, 0, this_param);
 315                 SSVAL(vwv +10, 0, param_offset);
 316                 SSVAL(vwv +11, 0, this_data);
 317                 SSVAL(vwv +12, 0, data_offset);
 318                 SCVAL(vwv +13, 0, state->num_setup);
 319                 SCVAL(vwv +13, 1, 0);   /* reserved */
 320                 memcpy(vwv + 14, state->setup,
 321                        sizeof(uint16_t) * state->num_setup);
 322                 break;
 323         case SMBtranss:
 324         case SMBtranss2:
 325                 SSVAL(vwv + 0, 0, state->num_param);
 326                 SSVAL(vwv + 1, 0, state->num_data);
 327                 SSVAL(vwv + 2, 0, this_param);
 328                 SSVAL(vwv + 3, 0, param_offset);
 329                 SSVAL(vwv + 4, 0, state->param_sent);
 330                 SSVAL(vwv + 5, 0, this_data);
 331                 SSVAL(vwv + 6, 0, data_offset);
 332                 SSVAL(vwv + 7, 0, state->data_sent);
 333                 if (cmd == SMBtranss2) {
 334                         SSVAL(vwv + 8, 0, state->fid);
 335                 }
 336                 break;
 337         case SMBnttrans:
 338                 SCVAL(vwv + 0, 0, state->max_setup);
 339                 SSVAL(vwv + 0, 1, 0); /* reserved */
 340                 SIVAL(vwv + 1, 1, state->num_param);
 341                 SIVAL(vwv + 3, 1, state->num_data);
 342                 SIVAL(vwv + 5, 1, state->rparam.max);
 343                 SIVAL(vwv + 7, 1, state->rdata.max);
 344                 SIVAL(vwv + 9, 1, this_param);
 345                 SIVAL(vwv +11, 1, param_offset);
 346                 SIVAL(vwv +13, 1, this_data);
 347                 SIVAL(vwv +15, 1, data_offset);
 348                 SCVAL(vwv +17, 1, state->num_setup);
 349                 SSVAL(vwv +18, 0, state->function);
 350                 memcpy(vwv + 19, state->setup,
 351                        sizeof(uint16_t) * state->num_setup);
 352                 break;
 353         case SMBnttranss:
 354                 SSVAL(vwv + 0, 0, 0); /* reserved */
 355                 SCVAL(vwv + 1, 0, 0); /* reserved */
 356                 SIVAL(vwv + 1, 1, state->num_param);
 357                 SIVAL(vwv + 3, 1, state->num_data);
 358                 SIVAL(vwv + 5, 1, this_param);
 359                 SIVAL(vwv + 7, 1, param_offset);
 360                 SIVAL(vwv + 9, 1, state->param_sent);
 361                 SIVAL(vwv +11, 1, this_data);
 362                 SIVAL(vwv +13, 1, data_offset);
 363                 SIVAL(vwv +15, 1, state->data_sent);
 364                 SCVAL(vwv +17, 1, 0); /* reserved */
 365                 break;
 366         }
 367
 368         state->param_sent += this_param;
 369         state->data_sent += this_data;
 370
 371         *pwct = wct;
 372         *piov_count = iov - state->iov;
 373 }
 374
 375 static void cli_trans_done(struct tevent_req *subreq);
 376
 377 struct tevent_req *cli_trans_send(
 378         TALLOC_CTX *mem_ctx, struct tevent_context *ev,
 379         struct cli_state *cli, uint8_t cmd,
 380         const char *pipe_name, uint16_t fid, uint16_t function, int flags,
 381         uint16_t *setup, uint8_t num_setup, uint8_t max_setup,
 382         uint8_t *param, uint32_t num_param, uint32_t max_param,
 383         uint8_t *data, uint32_t num_data, uint32_t max_data)
 384 {
 385         struct tevent_req *req, *subreq;
 386         struct cli_trans_state *state;
 387         int iov_count;
 388         uint8_t wct;
 389         NTSTATUS status;
 390
 391         req = tevent_req_create(mem_ctx, &state, struct cli_trans_state);
 392         if (req == NULL) {
 393                 return NULL;
 394         }
 395
 396         if ((cmd == SMBtrans) || (cmd == SMBtrans2)) {
 397                 if ((num_param > 0xffff) || (max_param > 0xffff)
 398                     || (num_data > 0xffff) || (max_data > 0xffff)) {
 399                         DEBUG(3, ("Attempt to send invalid trans2 request "
 400                                   "(setup %u, params %u/%u, data %u/%u)\n",
 401                                   (unsigned)num_setup,
 402                                   (unsigned)num_param, (unsigned)max_param,
 403                                   (unsigned)num_data, (unsigned)max_data));
 404                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 405                         return tevent_req_post(req, ev);
 406                 }
 407         }
 408
 409         /*
 410          * The largest wct will be for nttrans (19+num_setup). Make sure we
 411          * don't overflow state->vwv in cli_trans_format.
 412          */
 413
 414         if ((num_setup + 19) > ARRAY_SIZE(state->vwv)) {
 415                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 416                 return tevent_req_post(req, ev);
 417         }
 418
 419         state->cli = cli;
 420         state->ev = ev;
 421         state->cmd = cmd;
 422         state->flags = flags;
 423         state->num_rsetup = 0;
 424         state->rsetup = NULL;
 425         ZERO_STRUCT(state->rparam);
 426         ZERO_STRUCT(state->rdata);
 427
 428         if ((pipe_name != NULL)
 429             && (!convert_string_talloc(state, CH_UNIX,
 430                                        cli_ucs2(cli) ? CH_UTF16LE : CH_DOS,
 431                                        pipe_name, strlen(pipe_name) + 1,
 432                                        &state->pipe_name_conv,
 433                                        &state->pipe_name_conv_len))) {
 434                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 435                 return tevent_req_post(req, ev);
 436         }
 437         state->fid = fid;       /* trans2 */
 438         state->function = function; /* nttrans */
 439
 440         state->setup = setup;
 441         state->num_setup = num_setup;
 442         state->max_setup = max_setup;
 443
 444         state->param = param;
 445         state->num_param = num_param;
 446         state->param_sent = 0;
 447         state->rparam.max = max_param;
 448
 449         state->data = data;
 450         state->num_data = num_data;
 451         state->data_sent = 0;
 452         state->rdata.max = max_data;
 453
 454         cli_trans_format(state, &wct, &iov_count);
 455
 456         subreq = cli_smb_req_create(state, ev, cli, cmd, 0, wct, state->vwv,
 457                                     iov_count, state->iov);
 458         if (tevent_req_nomem(subreq, req)) {
 459                 return tevent_req_post(req, ev);
 460         }
 461         status = cli_smb_req_send(subreq);
 462         if (!NT_STATUS_IS_OK(status)) {
 463                 tevent_req_nterror(req, status);
 464                 return tevent_req_post(req, state->ev);
 465         }
 466         tevent_req_set_callback(subreq, cli_trans_done, req);
 467
 468         /*
 469          * Now get the MID of the primary request
 470          * and mark it as persistent. This means
 471          * we will able to send and receive multiple
 472          * SMB pdus using this MID in both directions
 473          * (including correct SMB signing).
 474          */
 475         state->mid = cli_smb_req_mid(subreq);
 476         cli_smb_req_set_mid(subreq, state->mid);
 477         state->primary_subreq = subreq;
 478         talloc_set_destructor(state, cli_trans_state_destructor);
 479
 480         return req;
 481 }
 482
 483 static void cli_trans_done2(struct tevent_req *subreq);
 484
 485 static void cli_trans_done(struct tevent_req *subreq)
 486 {
 487         struct tevent_req *req = tevent_req_callback_data(
 488                 subreq, struct tevent_req);
 489         struct cli_trans_state *state = tevent_req_data(
 490                 req, struct cli_trans_state);
 491         NTSTATUS status;
 492         bool sent_all;
 493         const uint8_t *inhdr;
 494         uint8_t wct;
 495         uint16_t *vwv;
 496         uint32_t num_bytes;
 497         uint8_t *bytes;
 498         uint8_t *inbuf;
 499         uint8_t num_setup       = 0;
 500         uint16_t *setup         = NULL;
 501         uint32_t total_param    = 0;
 502         uint32_t num_param      = 0;
 503         uint32_t param_disp     = 0;
 504         uint32_t total_data     = 0;
 505         uint32_t num_data       = 0;
 506         uint32_t data_disp      = 0;
 507         uint8_t *param          = NULL;
 508         uint8_t *data           = NULL;
 509
 510         status = cli_smb_recv(subreq, state, &inbuf, 0, &wct, &vwv,
 511                               &num_bytes, &bytes);
 512         /*
 513          * Do not TALLOC_FREE(subreq) here, we might receive more than
 514          * one response for the same mid.
 515          */
 516
 517         /*
 518          * We can receive something like STATUS_MORE_ENTRIES, so don't use
 519          * !NT_STATUS_IS_OK(status) here.
 520          */
 521
 522         if (NT_STATUS_IS_ERR(status)) {
 523                 goto fail;
 524         }
 525         inhdr = inbuf + NBT_HDR_SIZE;
 526
 527         sent_all = ((state->param_sent == state->num_param)
 528                     && (state->data_sent == state->num_data));
 529
 530         status = cli_pull_trans(
 531                 inbuf, wct, vwv, num_bytes, bytes,
 532                 state->cmd, !sent_all, &num_setup, &setup,
 533                 &total_param, &num_param, &param_disp, &param,
 534                 &total_data, &num_data, &data_disp, &data);
 535
 536         if (!NT_STATUS_IS_OK(status)) {
 537                 goto fail;
 538         }
 539
 540         if (!sent_all) {
 541                 int iov_count;
 542                 struct tevent_req *subreq2;
 543
 544                 cli_trans_format(state, &wct, &iov_count);
 545
 546                 subreq2 = cli_smb_req_create(state, state->ev, state->cli,
 547                                              state->cmd + 1, 0, wct, state->vwv,
 548                                              iov_count, state->iov);
 549                 if (tevent_req_nomem(subreq2, req)) {
 550                         return;
 551                 }
 552                 cli_smb_req_set_mid(subreq2, state->mid);
 553
 554                 status = cli_smb_req_send(subreq2);
 555
 556                 if (!NT_STATUS_IS_OK(status)) {
 557                         goto fail;
 558                 }
 559                 tevent_req_set_callback(subreq2, cli_trans_done2, req);
 560
 561                 return;
 562         }
 563
 564         status = cli_trans_pull_blob(
 565                 state, &state->rparam, total_param, num_param, param,
 566                 param_disp);
 567
 568         if (!NT_STATUS_IS_OK(status)) {
 569                 DEBUG(10, ("Pulling params failed: %s\n", nt_errstr(status)));
 570                 goto fail;
 571         }
 572
 573         status = cli_trans_pull_blob(
 574                 state, &state->rdata, total_data, num_data, data,
 575                 data_disp);
 576
 577         if (!NT_STATUS_IS_OK(status)) {
 578                 DEBUG(10, ("Pulling data failed: %s\n", nt_errstr(status)));
 579                 goto fail;
 580         }
 581
 582         if ((state->rparam.total == state->rparam.received)
 583             && (state->rdata.total == state->rdata.received)) {
 584                 state->recv_flags2 = SVAL(inhdr, HDR_FLG2);
 585                 cli_trans_cleanup_primary(state);
 586                 tevent_req_done(req);
 587                 return;
 588         }
 589
 590         TALLOC_FREE(inbuf);
 591
 592         return;
 593
 594  fail:
 595         cli_trans_cleanup_primary(state);
 596         tevent_req_nterror(req, status);
 597 }
 598
 599 static void cli_trans_done2(struct tevent_req *subreq2)
 600 {
 601         struct tevent_req *req = tevent_req_callback_data(
 602                 subreq2, struct tevent_req);
 603         struct cli_trans_state *state = tevent_req_data(
 604                 req, struct cli_trans_state);
 605         NTSTATUS status;
 606         bool sent_all;
 607         uint8_t wct;
 608         uint32_t seqnum;
 609
 610         /*
 611          * First backup the seqnum of the secondary request
 612          * and attach it to the primary request.
 613          */
 614         seqnum = cli_smb_req_seqnum(subreq2);
 615         cli_smb_req_set_seqnum(state->primary_subreq, seqnum);
 616
 617         status = cli_smb_recv(subreq2, state, NULL, 0, &wct, NULL,
 618                               NULL, NULL);
 619         TALLOC_FREE(subreq2);
 620
 621         if (!NT_STATUS_IS_OK(status)) {
 622                 goto fail;
 623         }
 624
 625         if (wct != 0) {
 626                 status = NT_STATUS_INVALID_NETWORK_RESPONSE;
 627                 goto fail;
 628         }
 629
 630         sent_all = ((state->param_sent == state->num_param)
 631                     && (state->data_sent == state->num_data));
 632
 633         if (!sent_all) {
 634                 int iov_count;
 635
 636                 cli_trans_format(state, &wct, &iov_count);
 637
 638                 subreq2 = cli_smb_req_create(state, state->ev, state->cli,
 639                                              state->cmd + 1, 0, wct, state->vwv,
 640                                              iov_count, state->iov);
 641                 if (tevent_req_nomem(subreq2, req)) {
 642                         return;
 643                 }
 644                 cli_smb_req_set_mid(subreq2, state->mid);
 645
 646                 status = cli_smb_req_send(subreq2);
 647
 648                 if (!NT_STATUS_IS_OK(status)) {
 649                         goto fail;
 650                 }
 651                 tevent_req_set_callback(subreq2, cli_trans_done2, req);
 652                 return;
 653         }
 654
 655         return;
 656
 657  fail:
 658         cli_trans_cleanup_primary(state);
 659         tevent_req_nterror(req, status);
 660 }
 661
 662 NTSTATUS cli_trans_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 663                         uint16_t *recv_flags2,
 664                         uint16_t **setup, uint8_t min_setup,
 665                         uint8_t *num_setup,
 666                         uint8_t **param, uint32_t min_param,
 667                         uint32_t *num_param,
 668                         uint8_t **data, uint32_t min_data,
 669                         uint32_t *num_data)
 670 {
 671         struct cli_trans_state *state = tevent_req_data(
 672                 req, struct cli_trans_state);
 673         NTSTATUS status;
 674
 675         cli_trans_cleanup_primary(state);
 676
 677         if (tevent_req_is_nterror(req, &status)) {
 678                 return status;
 679         }
 680
 681         if ((state->num_rsetup < min_setup)
 682             || (state->rparam.total < min_param)
 683             || (state->rdata.total < min_data)) {
 684                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
 685         }
 686
 687         if (recv_flags2 != NULL) {
 688                 *recv_flags2 = state->recv_flags2;
 689         }
 690
 691         if (setup != NULL) {
 692                 *setup = talloc_move(mem_ctx, &state->rsetup);
 693                 *num_setup = state->num_rsetup;
 694         } else {
 695                 TALLOC_FREE(state->rsetup);
 696         }
 697
 698         if (param != NULL) {
 699                 *param = talloc_move(mem_ctx, &state->rparam.data);
 700                 *num_param = state->rparam.total;
 701         } else {
 702                 TALLOC_FREE(state->rparam.data);
 703         }
 704
 705         if (data != NULL) {
 706                 *data = talloc_move(mem_ctx, &state->rdata.data);
 707                 *num_data = state->rdata.total;
 708         } else {
 709                 TALLOC_FREE(state->rdata.data);
 710         }
 711
 712         return NT_STATUS_OK;
 713 }
 714
 715 NTSTATUS cli_trans(TALLOC_CTX *mem_ctx, struct cli_state *cli,
 716                    uint8_t trans_cmd,
 717                    const char *pipe_name, uint16_t fid, uint16_t function,
 718                    int flags,
 719                    uint16_t *setup, uint8_t num_setup, uint8_t max_setup,
 720                    uint8_t *param, uint32_t num_param, uint32_t max_param,
 721                    uint8_t *data, uint32_t num_data, uint32_t max_data,
 722                    uint16_t *recv_flags2,
 723                    uint16_t **rsetup, uint8_t min_rsetup, uint8_t *num_rsetup,
 724                    uint8_t **rparam, uint32_t min_rparam, uint32_t *num_rparam,
 725                    uint8_t **rdata, uint32_t min_rdata, uint32_t *num_rdata)
 726 {
 727         TALLOC_CTX *frame = talloc_stackframe();
 728         struct tevent_context *ev;
 729         struct tevent_req *req;
 730         NTSTATUS status = NT_STATUS_OK;
 731
 732         if (cli_has_async_calls(cli)) {
 733                 /*
 734                  * Can't use sync call while an async call is in flight
 735                  */
 736                 status = NT_STATUS_INVALID_PARAMETER;
 737                 goto fail;
 738         }
 739
 740         ev = tevent_context_init(frame);
 741         if (ev == NULL) {
 742                 status = NT_STATUS_NO_MEMORY;
 743                 goto fail;
 744         }
 745
 746         req = cli_trans_send(frame, ev, cli, trans_cmd,
 747                              pipe_name, fid, function, flags,
 748                              setup, num_setup, max_setup,
 749                              param, num_param, max_param,
 750                              data, num_data, max_data);
 751         if (req == NULL) {
 752                 status = NT_STATUS_NO_MEMORY;
 753                 goto fail;
 754         }
 755
 756         if (!tevent_req_poll(req, ev)) {
 757                 status = map_nt_error_from_unix_common(errno);
 758                 goto fail;
 759         }
 760
 761         status = cli_trans_recv(req, mem_ctx, recv_flags2,
 762                                 rsetup, min_rsetup, num_rsetup,
 763                                 rparam, min_rparam, num_rparam,
 764                                 rdata, min_rdata, num_rdata);
 765  fail:
 766         TALLOC_FREE(frame);
 767         return status;
 768 }