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