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         uint8_t expected_num_setup;
  89
  90         if (expect_first_reply) {
  91                 if ((wct != 0) || (num_bytes != 0)) {
  92                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
  93                 }
  94                 return NT_STATUS_OK;
  95         }
  96
  97         switch (smb_cmd) {
  98         case SMBtrans:
  99         case SMBtrans2:
 100                 if (wct < 10) {
 101                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
 102                 }
 103                 expected_num_setup = wct - 10;
 104                 *ptotal_param   = SVAL(vwv + 0, 0);
 105                 *ptotal_data    = SVAL(vwv + 1, 0);
 106                 *pnum_param     = SVAL(vwv + 3, 0);
 107                 param_ofs       = SVAL(vwv + 4, 0);
 108                 *pparam_disp    = SVAL(vwv + 5, 0);
 109                 *pnum_data      = SVAL(vwv + 6, 0);
 110                 data_ofs        = SVAL(vwv + 7, 0);
 111                 *pdata_disp     = SVAL(vwv + 8, 0);
 112                 *pnum_setup     = CVAL(vwv + 9, 0);
 113                 if (expected_num_setup < (*pnum_setup)) {
 114                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
 115                 }
 116                 *psetup = vwv + 10;
 117
 118                 break;
 119         case SMBnttrans:
 120                 if (wct < 18) {
 121                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
 122                 }
 123                 *ptotal_param   = IVAL(vwv, 3);
 124                 *ptotal_data    = IVAL(vwv, 7);
 125                 *pnum_param     = IVAL(vwv, 11);
 126                 param_ofs       = IVAL(vwv, 15);
 127                 *pparam_disp    = IVAL(vwv, 19);
 128                 *pnum_data      = IVAL(vwv, 23);
 129                 data_ofs        = IVAL(vwv, 27);
 130                 *pdata_disp     = IVAL(vwv, 31);
 131                 *pnum_setup     = CVAL(vwv, 35);
 132                 *psetup         = vwv + 18;
 133                 break;
 134
 135         default:
 136                 return NT_STATUS_INTERNAL_ERROR;
 137         }
 138
 139         /*
 140          * Check for buffer overflows. data_ofs needs to be checked against
 141          * the incoming buffer length, data_disp against the total
 142          * length. Likewise for param_ofs/param_disp.
 143          */
 144
 145         if (smb_buffer_oob(smb_len_nbt(inbuf), param_ofs, *pnum_param)
 146             || smb_buffer_oob(*ptotal_param, *pparam_disp, *pnum_param)
 147             || smb_buffer_oob(smb_len_nbt(inbuf), data_ofs, *pnum_data)
 148             || smb_buffer_oob(*ptotal_data, *pdata_disp, *pnum_data)) {
 149                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
 150         }
 151
 152         *pparam = (uint8_t *)inbuf + 4 + param_ofs;
 153         *pdata = (uint8_t *)inbuf + 4 + data_ofs;
 154
 155         return NT_STATUS_OK;
 156 }
 157
 158 static NTSTATUS cli_trans_pull_blob(TALLOC_CTX *mem_ctx,
 159                                     struct trans_recvblob *blob,
 160                                     uint32_t total, uint32_t thistime,
 161                                     uint8_t *buf, uint32_t displacement)
 162 {
 163         if (blob->data == NULL) {
 164                 if (total > blob->max) {
 165                         return NT_STATUS_INVALID_NETWORK_RESPONSE;
 166                 }
 167                 blob->total = total;
 168                 blob->data = talloc_array(mem_ctx, uint8_t, total);
 169                 if (blob->data == NULL) {
 170                         return NT_STATUS_NO_MEMORY;
 171                 }
 172         }
 173
 174         if (total > blob->total) {
 175                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
 176         }
 177
 178         if (thistime) {
 179                 memcpy(blob->data + displacement, buf, thistime);
 180                 blob->received += thistime;
 181         }
 182
 183         return NT_STATUS_OK;
 184 }
 185
 186 static void cli_trans_format(struct cli_trans_state *state, uint8_t *pwct,
 187                              int *piov_count)
 188 {
 189         struct cli_state *cli = state->cli;
 190         uint8_t wct = 0;
 191         struct iovec *iov = state->iov;
 192         uint8_t *pad = state->pad;
 193         uint16_t *vwv = state->vwv;
 194         uint32_t param_offset;
 195         uint32_t this_param = 0;
 196         uint32_t param_pad;
 197         uint32_t data_offset;
 198         uint32_t this_data = 0;
 199         uint32_t data_pad;
 200         uint32_t useable_space;
 201         uint8_t cmd;
 202
 203         cmd = state->cmd;
 204
 205         if ((state->param_sent != 0) || (state->data_sent != 0)) {
 206                 /* The secondary commands are one after the primary ones */
 207                 cmd += 1;
 208         }
 209
 210         param_offset = MIN_SMB_SIZE;
 211
 212         switch (cmd) {
 213         case SMBtrans:
 214                 if (cli_ucs2(state->cli)) {
 215                         pad[0] = 0;
 216                         iov[0].iov_base = (void *)pad;
 217                         iov[0].iov_len = 1;
 218                         param_offset += 1;
 219                         iov += 1;
 220                 }
 221                 iov[0].iov_base = (void *)state->pipe_name_conv;
 222                 iov[0].iov_len = state->pipe_name_conv_len;
 223                 wct = 14 + state->num_setup;
 224                 param_offset += iov[0].iov_len;
 225                 iov += 1;
 226                 break;
 227         case SMBtrans2:
 228                 pad[0] = 0;
 229                 pad[1] = 'D'; /* Copy this from "old" 3.0 behaviour */
 230                 pad[2] = ' ';
 231                 iov[0].iov_base = (void *)pad;
 232                 iov[0].iov_len = 3;
 233                 wct = 14 + state->num_setup;
 234                 param_offset += 3;
 235                 iov += 1;
 236                 break;
 237         case SMBtranss:
 238                 wct = 8;
 239                 break;
 240         case SMBtranss2:
 241                 wct = 9;
 242                 break;
 243         case SMBnttrans:
 244                 wct = 19 + state->num_setup;
 245                 break;
 246         case SMBnttranss:
 247                 wct = 18;
 248                 break;
 249         }
 250
 251         param_offset += wct * sizeof(uint16_t);
 252         useable_space = cli_state_available_size(cli, param_offset);
 253
 254         param_pad = param_offset % 4;
 255         if (param_pad > 0) {
 256                 param_pad = MIN(param_pad, useable_space);
 257                 iov[0].iov_base = (void *)state->zero_pad;
 258                 iov[0].iov_len = param_pad;
 259                 iov += 1;
 260                 param_offset += param_pad;
 261         }
 262         useable_space = cli_state_available_size(cli, param_offset);
 263
 264         if (state->param_sent < state->num_param) {
 265                 this_param = MIN(state->num_param - state->param_sent,
 266                                  useable_space);
 267                 iov[0].iov_base = (void *)(state->param + state->param_sent);
 268                 iov[0].iov_len = this_param;
 269                 iov += 1;
 270         }
 271
 272         data_offset = param_offset + this_param;
 273         useable_space = cli_state_available_size(cli, data_offset);
 274
 275         data_pad = data_offset % 4;
 276         if (data_pad > 0) {
 277                 data_pad = MIN(data_pad, useable_space);
 278                 iov[0].iov_base = (void *)state->zero_pad;
 279                 iov[0].iov_len = data_pad;
 280                 iov += 1;
 281                 data_offset += data_pad;
 282         }
 283         useable_space = cli_state_available_size(cli, data_offset);
 284
 285         if (state->data_sent < state->num_data) {
 286                 this_data = MIN(state->num_data - state->data_sent,
 287                                 useable_space);
 288                 iov[0].iov_base = (void *)(state->data + state->data_sent);
 289                 iov[0].iov_len = this_data;
 290                 iov += 1;
 291         }
 292
 293         DEBUG(10, ("num_setup=%u, max_setup=%u, "
 294                    "param_total=%u, this_param=%u, max_param=%u, "
 295                    "data_total=%u, this_data=%u, max_data=%u, "
 296                    "param_offset=%u, param_pad=%u, param_disp=%u, "
 297                    "data_offset=%u, data_pad=%u, data_disp=%u\n",
 298                    (unsigned)state->num_setup, (unsigned)state->max_setup,
 299                    (unsigned)state->num_param, (unsigned)this_param,
 300                    (unsigned)state->rparam.max,
 301                    (unsigned)state->num_data, (unsigned)this_data,
 302                    (unsigned)state->rdata.max,
 303                    (unsigned)param_offset, (unsigned)param_pad,
 304                    (unsigned)state->param_sent,
 305                    (unsigned)data_offset, (unsigned)data_pad,
 306                    (unsigned)state->data_sent));
 307
 308         switch (cmd) {
 309         case SMBtrans:
 310         case SMBtrans2:
 311                 SSVAL(vwv + 0, 0, state->num_param);
 312                 SSVAL(vwv + 1, 0, state->num_data);
 313                 SSVAL(vwv + 2, 0, state->rparam.max);
 314                 SSVAL(vwv + 3, 0, state->rdata.max);
 315                 SCVAL(vwv + 4, 0, state->max_setup);
 316                 SCVAL(vwv + 4, 1, 0);   /* reserved */
 317                 SSVAL(vwv + 5, 0, state->flags);
 318                 SIVAL(vwv + 6, 0, 0);   /* timeout */
 319                 SSVAL(vwv + 8, 0, 0);   /* reserved */
 320                 SSVAL(vwv + 9, 0, this_param);
 321                 SSVAL(vwv +10, 0, param_offset);
 322                 SSVAL(vwv +11, 0, this_data);
 323                 SSVAL(vwv +12, 0, data_offset);
 324                 SCVAL(vwv +13, 0, state->num_setup);
 325                 SCVAL(vwv +13, 1, 0);   /* reserved */
 326                 memcpy(vwv + 14, state->setup,
 327                        sizeof(uint16_t) * state->num_setup);
 328                 break;
 329         case SMBtranss:
 330         case SMBtranss2:
 331                 SSVAL(vwv + 0, 0, state->num_param);
 332                 SSVAL(vwv + 1, 0, state->num_data);
 333                 SSVAL(vwv + 2, 0, this_param);
 334                 SSVAL(vwv + 3, 0, param_offset);
 335                 SSVAL(vwv + 4, 0, state->param_sent);
 336                 SSVAL(vwv + 5, 0, this_data);
 337                 SSVAL(vwv + 6, 0, data_offset);
 338                 SSVAL(vwv + 7, 0, state->data_sent);
 339                 if (cmd == SMBtranss2) {
 340                         SSVAL(vwv + 8, 0, state->fid);
 341                 }
 342                 break;
 343         case SMBnttrans:
 344                 SCVAL(vwv + 0, 0, state->max_setup);
 345                 SSVAL(vwv + 0, 1, 0); /* reserved */
 346                 SIVAL(vwv + 1, 1, state->num_param);
 347                 SIVAL(vwv + 3, 1, state->num_data);
 348                 SIVAL(vwv + 5, 1, state->rparam.max);
 349                 SIVAL(vwv + 7, 1, state->rdata.max);
 350                 SIVAL(vwv + 9, 1, this_param);
 351                 SIVAL(vwv +11, 1, param_offset);
 352                 SIVAL(vwv +13, 1, this_data);
 353                 SIVAL(vwv +15, 1, data_offset);
 354                 SCVAL(vwv +17, 1, state->num_setup);
 355                 SSVAL(vwv +18, 0, state->function);
 356                 memcpy(vwv + 19, state->setup,
 357                        sizeof(uint16_t) * state->num_setup);
 358                 break;
 359         case SMBnttranss:
 360                 SSVAL(vwv + 0, 0, 0); /* reserved */
 361                 SCVAL(vwv + 1, 0, 0); /* reserved */
 362                 SIVAL(vwv + 1, 1, state->num_param);
 363                 SIVAL(vwv + 3, 1, state->num_data);
 364                 SIVAL(vwv + 5, 1, this_param);
 365                 SIVAL(vwv + 7, 1, param_offset);
 366                 SIVAL(vwv + 9, 1, state->param_sent);
 367                 SIVAL(vwv +11, 1, this_data);
 368                 SIVAL(vwv +13, 1, data_offset);
 369                 SIVAL(vwv +15, 1, state->data_sent);
 370                 SCVAL(vwv +17, 1, 0); /* reserved */
 371                 break;
 372         }
 373
 374         state->param_sent += this_param;
 375         state->data_sent += this_data;
 376
 377         *pwct = wct;
 378         *piov_count = iov - state->iov;
 379 }
 380
 381 static void cli_trans_done(struct tevent_req *subreq);
 382
 383 struct tevent_req *cli_trans_send(
 384         TALLOC_CTX *mem_ctx, struct tevent_context *ev,
 385         struct cli_state *cli, uint8_t cmd,
 386         const char *pipe_name, uint16_t fid, uint16_t function, int flags,
 387         uint16_t *setup, uint8_t num_setup, uint8_t max_setup,
 388         uint8_t *param, uint32_t num_param, uint32_t max_param,
 389         uint8_t *data, uint32_t num_data, uint32_t max_data)
 390 {
 391         struct tevent_req *req, *subreq;
 392         struct cli_trans_state *state;
 393         int iov_count;
 394         uint8_t wct;
 395         NTSTATUS status;
 396
 397         req = tevent_req_create(mem_ctx, &state, struct cli_trans_state);
 398         if (req == NULL) {
 399                 return NULL;
 400         }
 401
 402         if ((cmd == SMBtrans) || (cmd == SMBtrans2)) {
 403                 if ((num_param > 0xffff) || (max_param > 0xffff)
 404                     || (num_data > 0xffff) || (max_data > 0xffff)) {
 405                         DEBUG(3, ("Attempt to send invalid trans2 request "
 406                                   "(setup %u, params %u/%u, data %u/%u)\n",
 407                                   (unsigned)num_setup,
 408                                   (unsigned)num_param, (unsigned)max_param,
 409                                   (unsigned)num_data, (unsigned)max_data));
 410                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 411                         return tevent_req_post(req, ev);
 412                 }
 413         }
 414
 415         /*
 416          * The largest wct will be for nttrans (19+num_setup). Make sure we
 417          * don't overflow state->vwv in cli_trans_format.
 418          */
 419
 420         if ((num_setup + 19) > ARRAY_SIZE(state->vwv)) {
 421                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 422                 return tevent_req_post(req, ev);
 423         }
 424
 425         state->cli = cli;
 426         state->ev = ev;
 427         state->cmd = cmd;
 428         state->flags = flags;
 429         state->num_rsetup = 0;
 430         state->rsetup = NULL;
 431         ZERO_STRUCT(state->rparam);
 432         ZERO_STRUCT(state->rdata);
 433
 434         if ((pipe_name != NULL)
 435             && (!convert_string_talloc(state, CH_UNIX,
 436                                        cli_ucs2(cli) ? CH_UTF16LE : CH_DOS,
 437                                        pipe_name, strlen(pipe_name) + 1,
 438                                        &state->pipe_name_conv,
 439                                        &state->pipe_name_conv_len))) {
 440                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 441                 return tevent_req_post(req, ev);
 442         }
 443         state->fid = fid;       /* trans2 */
 444         state->function = function; /* nttrans */
 445
 446         state->setup = setup;
 447         state->num_setup = num_setup;
 448         state->max_setup = max_setup;
 449
 450         state->param = param;
 451         state->num_param = num_param;
 452         state->param_sent = 0;
 453         state->rparam.max = max_param;
 454
 455         state->data = data;
 456         state->num_data = num_data;
 457         state->data_sent = 0;
 458         state->rdata.max = max_data;
 459
 460         cli_trans_format(state, &wct, &iov_count);
 461
 462         subreq = cli_smb_req_create(state, ev, cli, cmd, 0, wct, state->vwv,
 463                                     iov_count, state->iov);
 464         if (tevent_req_nomem(subreq, req)) {
 465                 return tevent_req_post(req, ev);
 466         }
 467         status = cli_smb_req_send(subreq);
 468         if (!NT_STATUS_IS_OK(status)) {
 469                 tevent_req_nterror(req, status);
 470                 return tevent_req_post(req, state->ev);
 471         }
 472         tevent_req_set_callback(subreq, cli_trans_done, req);
 473
 474         /*
 475          * Now get the MID of the primary request
 476          * and mark it as persistent. This means
 477          * we will able to send and receive multiple
 478          * SMB pdus using this MID in both directions
 479          * (including correct SMB signing).
 480          */
 481         state->mid = cli_smb_req_mid(subreq);
 482         cli_smb_req_set_mid(subreq, state->mid);
 483         state->primary_subreq = subreq;
 484         talloc_set_destructor(state, cli_trans_state_destructor);
 485
 486         return req;
 487 }
 488
 489 static void cli_trans_done2(struct tevent_req *subreq);
 490
 491 static void cli_trans_done(struct tevent_req *subreq)
 492 {
 493         struct tevent_req *req = tevent_req_callback_data(
 494                 subreq, struct tevent_req);
 495         struct cli_trans_state *state = tevent_req_data(
 496                 req, struct cli_trans_state);
 497         NTSTATUS status;
 498         bool sent_all;
 499         const uint8_t *inhdr;
 500         uint8_t wct;
 501         uint16_t *vwv;
 502         uint32_t num_bytes;
 503         uint8_t *bytes;
 504         uint8_t *inbuf;
 505         uint8_t num_setup       = 0;
 506         uint16_t *setup         = NULL;
 507         uint32_t total_param    = 0;
 508         uint32_t num_param      = 0;
 509         uint32_t param_disp     = 0;
 510         uint32_t total_data     = 0;
 511         uint32_t num_data       = 0;
 512         uint32_t data_disp      = 0;
 513         uint8_t *param          = NULL;
 514         uint8_t *data           = NULL;
 515
 516         status = cli_smb_recv(subreq, state, &inbuf, 0, &wct, &vwv,
 517                               &num_bytes, &bytes);
 518         /*
 519          * Do not TALLOC_FREE(subreq) here, we might receive more than
 520          * one response for the same mid.
 521          */
 522
 523         /*
 524          * We can receive something like STATUS_MORE_ENTRIES, so don't use
 525          * !NT_STATUS_IS_OK(status) here.
 526          */
 527
 528         if (NT_STATUS_IS_ERR(status)) {
 529                 goto fail;
 530         }
 531         inhdr = inbuf + NBT_HDR_SIZE;
 532
 533         sent_all = ((state->param_sent == state->num_param)
 534                     && (state->data_sent == state->num_data));
 535
 536         status = cli_pull_trans(
 537                 inbuf, wct, vwv, num_bytes, bytes,
 538                 state->cmd, !sent_all, &num_setup, &setup,
 539                 &total_param, &num_param, &param_disp, &param,
 540                 &total_data, &num_data, &data_disp, &data);
 541
 542         if (!NT_STATUS_IS_OK(status)) {
 543                 goto fail;
 544         }
 545
 546         if (!sent_all) {
 547                 int iov_count;
 548                 struct tevent_req *subreq2;
 549
 550                 cli_trans_format(state, &wct, &iov_count);
 551
 552                 subreq2 = cli_smb_req_create(state, state->ev, state->cli,
 553                                              state->cmd + 1, 0, wct, state->vwv,
 554                                              iov_count, state->iov);
 555                 if (tevent_req_nomem(subreq2, req)) {
 556                         return;
 557                 }
 558                 cli_smb_req_set_mid(subreq2, state->mid);
 559
 560                 status = cli_smb_req_send(subreq2);
 561
 562                 if (!NT_STATUS_IS_OK(status)) {
 563                         goto fail;
 564                 }
 565                 tevent_req_set_callback(subreq2, cli_trans_done2, req);
 566
 567                 return;
 568         }
 569
 570         status = cli_trans_pull_blob(
 571                 state, &state->rparam, total_param, num_param, param,
 572                 param_disp);
 573
 574         if (!NT_STATUS_IS_OK(status)) {
 575                 DEBUG(10, ("Pulling params failed: %s\n", nt_errstr(status)));
 576                 goto fail;
 577         }
 578
 579         status = cli_trans_pull_blob(
 580                 state, &state->rdata, total_data, num_data, data,
 581                 data_disp);
 582
 583         if (!NT_STATUS_IS_OK(status)) {
 584                 DEBUG(10, ("Pulling data failed: %s\n", nt_errstr(status)));
 585                 goto fail;
 586         }
 587
 588         if ((state->rparam.total == state->rparam.received)
 589             && (state->rdata.total == state->rdata.received)) {
 590                 state->recv_flags2 = SVAL(inhdr, HDR_FLG2);
 591                 cli_trans_cleanup_primary(state);
 592                 tevent_req_done(req);
 593                 return;
 594         }
 595
 596         TALLOC_FREE(inbuf);
 597
 598         return;
 599
 600  fail:
 601         cli_trans_cleanup_primary(state);
 602         tevent_req_nterror(req, status);
 603 }
 604
 605 static void cli_trans_done2(struct tevent_req *subreq2)
 606 {
 607         struct tevent_req *req = tevent_req_callback_data(
 608                 subreq2, struct tevent_req);
 609         struct cli_trans_state *state = tevent_req_data(
 610                 req, struct cli_trans_state);
 611         NTSTATUS status;
 612         bool sent_all;
 613         uint8_t wct;
 614         uint32_t seqnum;
 615
 616         /*
 617          * First backup the seqnum of the secondary request
 618          * and attach it to the primary request.
 619          */
 620         seqnum = cli_smb_req_seqnum(subreq2);
 621         cli_smb_req_set_seqnum(state->primary_subreq, seqnum);
 622
 623         status = cli_smb_recv(subreq2, state, NULL, 0, &wct, NULL,
 624                               NULL, NULL);
 625         TALLOC_FREE(subreq2);
 626
 627         if (!NT_STATUS_IS_OK(status)) {
 628                 goto fail;
 629         }
 630
 631         if (wct != 0) {
 632                 status = NT_STATUS_INVALID_NETWORK_RESPONSE;
 633                 goto fail;
 634         }
 635
 636         sent_all = ((state->param_sent == state->num_param)
 637                     && (state->data_sent == state->num_data));
 638
 639         if (!sent_all) {
 640                 int iov_count;
 641
 642                 cli_trans_format(state, &wct, &iov_count);
 643
 644                 subreq2 = cli_smb_req_create(state, state->ev, state->cli,
 645                                              state->cmd + 1, 0, wct, state->vwv,
 646                                              iov_count, state->iov);
 647                 if (tevent_req_nomem(subreq2, req)) {
 648                         return;
 649                 }
 650                 cli_smb_req_set_mid(subreq2, state->mid);
 651
 652                 status = cli_smb_req_send(subreq2);
 653
 654                 if (!NT_STATUS_IS_OK(status)) {
 655                         goto fail;
 656                 }
 657                 tevent_req_set_callback(subreq2, cli_trans_done2, req);
 658                 return;
 659         }
 660
 661         return;
 662
 663  fail:
 664         cli_trans_cleanup_primary(state);
 665         tevent_req_nterror(req, status);
 666 }
 667
 668 NTSTATUS cli_trans_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 669                         uint16_t *recv_flags2,
 670                         uint16_t **setup, uint8_t min_setup,
 671                         uint8_t *num_setup,
 672                         uint8_t **param, uint32_t min_param,
 673                         uint32_t *num_param,
 674                         uint8_t **data, uint32_t min_data,
 675                         uint32_t *num_data)
 676 {
 677         struct cli_trans_state *state = tevent_req_data(
 678                 req, struct cli_trans_state);
 679         NTSTATUS status;
 680
 681         cli_trans_cleanup_primary(state);
 682
 683         if (tevent_req_is_nterror(req, &status)) {
 684                 return status;
 685         }
 686
 687         if ((state->num_rsetup < min_setup)
 688             || (state->rparam.total < min_param)
 689             || (state->rdata.total < min_data)) {
 690                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
 691         }
 692
 693         if (recv_flags2 != NULL) {
 694                 *recv_flags2 = state->recv_flags2;
 695         }
 696
 697         if (setup != NULL) {
 698                 *setup = talloc_move(mem_ctx, &state->rsetup);
 699                 *num_setup = state->num_rsetup;
 700         } else {
 701                 TALLOC_FREE(state->rsetup);
 702         }
 703
 704         if (param != NULL) {
 705                 *param = talloc_move(mem_ctx, &state->rparam.data);
 706                 *num_param = state->rparam.total;
 707         } else {
 708                 TALLOC_FREE(state->rparam.data);
 709         }
 710
 711         if (data != NULL) {
 712                 *data = talloc_move(mem_ctx, &state->rdata.data);
 713                 *num_data = state->rdata.total;
 714         } else {
 715                 TALLOC_FREE(state->rdata.data);
 716         }
 717
 718         return NT_STATUS_OK;
 719 }
 720
 721 NTSTATUS cli_trans(TALLOC_CTX *mem_ctx, struct cli_state *cli,
 722                    uint8_t trans_cmd,
 723                    const char *pipe_name, uint16_t fid, uint16_t function,
 724                    int flags,
 725                    uint16_t *setup, uint8_t num_setup, uint8_t max_setup,
 726                    uint8_t *param, uint32_t num_param, uint32_t max_param,
 727                    uint8_t *data, uint32_t num_data, uint32_t max_data,
 728                    uint16_t *recv_flags2,
 729                    uint16_t **rsetup, uint8_t min_rsetup, uint8_t *num_rsetup,
 730                    uint8_t **rparam, uint32_t min_rparam, uint32_t *num_rparam,
 731                    uint8_t **rdata, uint32_t min_rdata, uint32_t *num_rdata)
 732 {
 733         TALLOC_CTX *frame = talloc_stackframe();
 734         struct tevent_context *ev;
 735         struct tevent_req *req;
 736         NTSTATUS status = NT_STATUS_OK;
 737
 738         if (cli_has_async_calls(cli)) {
 739                 /*
 740                  * Can't use sync call while an async call is in flight
 741                  */
 742                 status = NT_STATUS_INVALID_PARAMETER;
 743                 goto fail;
 744         }
 745
 746         ev = tevent_context_init(frame);
 747         if (ev == NULL) {
 748                 status = NT_STATUS_NO_MEMORY;
 749                 goto fail;
 750         }
 751
 752         req = cli_trans_send(frame, ev, cli, trans_cmd,
 753                              pipe_name, fid, function, flags,
 754                              setup, num_setup, max_setup,
 755                              param, num_param, max_param,
 756                              data, num_data, max_data);
 757         if (req == NULL) {
 758                 status = NT_STATUS_NO_MEMORY;
 759                 goto fail;
 760         }
 761
 762         if (!tevent_req_poll(req, ev)) {
 763                 status = map_nt_error_from_unix_common(errno);
 764                 goto fail;
 765         }
 766
 767         status = cli_trans_recv(req, mem_ctx, recv_flags2,
 768                                 rsetup, min_rsetup, num_rsetup,
 769                                 rparam, min_rparam, num_rparam,
 770                                 rdata, min_rdata, num_rdata);
 771  fail:
 772         TALLOC_FREE(frame);
 773         return status;
 774 }