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 event_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 (trans_oob(smb_len(inbuf), param_ofs, *pnum_param)
 144             || trans_oob(*ptotal_param, *pparam_disp, *pnum_param)
 145             || trans_oob(smb_len(inbuf), data_ofs, *pnum_data)
 146             || trans_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         uint8_t wct = 0;
 188         struct iovec *iov = state->iov;
 189         uint8_t *pad = state->pad;
 190         uint16_t *vwv = state->vwv;
 191         uint32_t param_offset;
 192         uint32_t this_param = 0;
 193         uint32_t param_pad;
 194         uint32_t data_offset;
 195         uint32_t this_data = 0;
 196         uint32_t data_pad;
 197         uint32_t useable_space;
 198         uint8_t cmd;
 199
 200         cmd = state->cmd;
 201
 202         if ((state->param_sent != 0) || (state->data_sent != 0)) {
 203                 /* The secondary commands are one after the primary ones */
 204                 cmd += 1;
 205         }
 206
 207         param_offset = smb_size - 4;
 208
 209         switch (cmd) {
 210         case SMBtrans:
 211                 pad[0] = 0;
 212                 iov[0].iov_base = (void *)pad;
 213                 iov[0].iov_len = 1;
 214                 iov[1].iov_base = (void *)state->pipe_name_conv;
 215                 iov[1].iov_len = state->pipe_name_conv_len;
 216                 wct = 14 + state->num_setup;
 217                 param_offset += iov[0].iov_len + iov[1].iov_len;
 218                 iov += 2;
 219                 break;
 220         case SMBtrans2:
 221                 pad[0] = 0;
 222                 pad[1] = 'D'; /* Copy this from "old" 3.0 behaviour */
 223                 pad[2] = ' ';
 224                 iov[0].iov_base = (void *)pad;
 225                 iov[0].iov_len = 3;
 226                 wct = 14 + state->num_setup;
 227                 param_offset += 3;
 228                 iov += 1;
 229                 break;
 230         case SMBtranss:
 231                 wct = 8;
 232                 break;
 233         case SMBtranss2:
 234                 wct = 9;
 235                 break;
 236         case SMBnttrans:
 237                 wct = 19 + state->num_setup;
 238                 break;
 239         case SMBnttranss:
 240                 wct = 18;
 241                 break;
 242         }
 243
 244         param_offset += wct * sizeof(uint16_t);
 245         useable_space = state->cli->max_xmit - param_offset;
 246
 247         param_pad = param_offset % 4;
 248         if (param_pad > 0) {
 249                 param_pad = MIN(param_pad, useable_space);
 250                 iov[0].iov_base = (void *)state->zero_pad;
 251                 iov[0].iov_len = param_pad;
 252                 iov += 1;
 253                 param_offset += param_pad;
 254         }
 255         useable_space = state->cli->max_xmit - param_offset;
 256
 257         if (state->param_sent < state->num_param) {
 258                 this_param = MIN(state->num_param - state->param_sent,
 259                                  useable_space);
 260                 iov[0].iov_base = (void *)(state->param + state->param_sent);
 261                 iov[0].iov_len = this_param;
 262                 iov += 1;
 263         }
 264
 265         data_offset = param_offset + this_param;
 266         useable_space = state->cli->max_xmit - data_offset;
 267
 268         data_pad = data_offset % 4;
 269         if (data_pad > 0) {
 270                 data_pad = MIN(data_pad, useable_space);
 271                 iov[0].iov_base = (void *)state->zero_pad;
 272                 iov[0].iov_len = data_pad;
 273                 iov += 1;
 274                 data_offset += data_pad;
 275         }
 276         useable_space = state->cli->max_xmit - data_offset;
 277
 278         if (state->data_sent < state->num_data) {
 279                 this_data = MIN(state->num_data - state->data_sent,
 280                                 useable_space);
 281                 iov[0].iov_base = (void *)(state->data + state->data_sent);
 282                 iov[0].iov_len = this_data;
 283                 iov += 1;
 284         }
 285
 286         DEBUG(10, ("num_setup=%u, max_setup=%u, "
 287                    "param_total=%u, this_param=%u, max_param=%u, "
 288                    "data_total=%u, this_data=%u, max_data=%u, "
 289                    "param_offset=%u, param_pad=%u, param_disp=%u, "
 290                    "data_offset=%u, data_pad=%u, data_disp=%u\n",
 291                    (unsigned)state->num_setup, (unsigned)state->max_setup,
 292                    (unsigned)state->num_param, (unsigned)this_param,
 293                    (unsigned)state->rparam.max,
 294                    (unsigned)state->num_data, (unsigned)this_data,
 295                    (unsigned)state->rdata.max,
 296                    (unsigned)param_offset, (unsigned)param_pad,
 297                    (unsigned)state->param_sent,
 298                    (unsigned)data_offset, (unsigned)data_pad,
 299                    (unsigned)state->data_sent));
 300
 301         switch (cmd) {
 302         case SMBtrans:
 303         case SMBtrans2:
 304                 SSVAL(vwv + 0, 0, state->num_param);
 305                 SSVAL(vwv + 1, 0, state->num_data);
 306                 SSVAL(vwv + 2, 0, state->rparam.max);
 307                 SSVAL(vwv + 3, 0, state->rdata.max);
 308                 SCVAL(vwv + 4, 0, state->max_setup);
 309                 SCVAL(vwv + 4, 1, 0);   /* reserved */
 310                 SSVAL(vwv + 5, 0, state->flags);
 311                 SIVAL(vwv + 6, 0, 0);   /* timeout */
 312                 SSVAL(vwv + 8, 0, 0);   /* reserved */
 313                 SSVAL(vwv + 9, 0, this_param);
 314                 SSVAL(vwv +10, 0, param_offset);
 315                 SSVAL(vwv +11, 0, this_data);
 316                 SSVAL(vwv +12, 0, data_offset);
 317                 SCVAL(vwv +13, 0, state->num_setup);
 318                 SCVAL(vwv +13, 1, 0);   /* reserved */
 319                 memcpy(vwv + 14, state->setup,
 320                        sizeof(uint16_t) * state->num_setup);
 321                 break;
 322         case SMBtranss:
 323         case SMBtranss2:
 324                 SSVAL(vwv + 0, 0, state->num_param);
 325                 SSVAL(vwv + 1, 0, state->num_data);
 326                 SSVAL(vwv + 2, 0, this_param);
 327                 SSVAL(vwv + 3, 0, param_offset);
 328                 SSVAL(vwv + 4, 0, state->param_sent);
 329                 SSVAL(vwv + 5, 0, this_data);
 330                 SSVAL(vwv + 6, 0, data_offset);
 331                 SSVAL(vwv + 7, 0, state->data_sent);
 332                 if (cmd == SMBtranss2) {
 333                         SSVAL(vwv + 8, 0, state->fid);
 334                 }
 335                 break;
 336         case SMBnttrans:
 337                 SCVAL(vwv + 0, 0, state->max_setup);
 338                 SSVAL(vwv + 0, 1, 0); /* reserved */
 339                 SIVAL(vwv + 1, 1, state->num_param);
 340                 SIVAL(vwv + 3, 1, state->num_data);
 341                 SIVAL(vwv + 5, 1, state->rparam.max);
 342                 SIVAL(vwv + 7, 1, state->rdata.max);
 343                 SIVAL(vwv + 9, 1, this_param);
 344                 SIVAL(vwv +11, 1, param_offset);
 345                 SIVAL(vwv +13, 1, this_data);
 346                 SIVAL(vwv +15, 1, data_offset);
 347                 SCVAL(vwv +17, 1, state->num_setup);
 348                 SSVAL(vwv +18, 0, state->function);
 349                 memcpy(vwv + 19, state->setup,
 350                        sizeof(uint16_t) * state->num_setup);
 351                 break;
 352         case SMBnttranss:
 353                 SSVAL(vwv + 0, 0, 0); /* reserved */
 354                 SCVAL(vwv + 1, 0, 0); /* reserved */
 355                 SIVAL(vwv + 1, 1, state->num_param);
 356                 SIVAL(vwv + 3, 1, state->num_data);
 357                 SIVAL(vwv + 5, 1, this_param);
 358                 SIVAL(vwv + 7, 1, param_offset);
 359                 SIVAL(vwv + 9, 1, state->param_sent);
 360                 SIVAL(vwv +11, 1, this_data);
 361                 SIVAL(vwv +13, 1, data_offset);
 362                 SIVAL(vwv +15, 1, state->data_sent);
 363                 SCVAL(vwv +17, 1, 0); /* reserved */
 364                 break;
 365         }
 366
 367         state->param_sent += this_param;
 368         state->data_sent += this_data;
 369
 370         *pwct = wct;
 371         *piov_count = iov - state->iov;
 372 }
 373
 374 static void cli_trans_done(struct tevent_req *subreq);
 375
 376 struct tevent_req *cli_trans_send(
 377         TALLOC_CTX *mem_ctx, struct event_context *ev,
 378         struct cli_state *cli, uint8_t cmd,
 379         const char *pipe_name, uint16_t fid, uint16_t function, int flags,
 380         uint16_t *setup, uint8_t num_setup, uint8_t max_setup,
 381         uint8_t *param, uint32_t num_param, uint32_t max_param,
 382         uint8_t *data, uint32_t num_data, uint32_t max_data)
 383 {
 384         struct tevent_req *req, *subreq;
 385         struct cli_trans_state *state;
 386         int iov_count;
 387         uint8_t wct;
 388         NTSTATUS status;
 389
 390         req = tevent_req_create(mem_ctx, &state, struct cli_trans_state);
 391         if (req == NULL) {
 392                 return NULL;
 393         }
 394
 395         if ((cmd == SMBtrans) || (cmd == SMBtrans2)) {
 396                 if ((num_param > 0xffff) || (max_param > 0xffff)
 397                     || (num_data > 0xffff) || (max_data > 0xffff)) {
 398                         DEBUG(3, ("Attempt to send invalid trans2 request "
 399                                   "(setup %u, params %u/%u, data %u/%u)\n",
 400                                   (unsigned)num_setup,
 401                                   (unsigned)num_param, (unsigned)max_param,
 402                                   (unsigned)num_data, (unsigned)max_data));
 403                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 404                         return tevent_req_post(req, ev);
 405                 }
 406         }
 407
 408         /*
 409          * The largest wct will be for nttrans (19+num_setup). Make sure we
 410          * don't overflow state->vwv in cli_trans_format.
 411          */
 412
 413         if ((num_setup + 19) > ARRAY_SIZE(state->vwv)) {
 414                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 415                 return tevent_req_post(req, ev);
 416         }
 417
 418         state->cli = cli;
 419         state->ev = ev;
 420         state->cmd = cmd;
 421         state->flags = flags;
 422         state->num_rsetup = 0;
 423         state->rsetup = NULL;
 424         ZERO_STRUCT(state->rparam);
 425         ZERO_STRUCT(state->rdata);
 426
 427         if ((pipe_name != NULL)
 428             && (!convert_string_talloc(state, CH_UNIX,
 429                                        cli_ucs2(cli) ? CH_UTF16LE : CH_DOS,
 430                                        pipe_name, strlen(pipe_name) + 1,
 431                                        &state->pipe_name_conv,
 432                                        &state->pipe_name_conv_len))) {
 433                 tevent_req_nterror(req, NT_STATUS_NO_MEMORY);
 434                 return tevent_req_post(req, ev);
 435         }
 436         state->fid = fid;       /* trans2 */
 437         state->function = function; /* nttrans */
 438
 439         state->setup = setup;
 440         state->num_setup = num_setup;
 441         state->max_setup = max_setup;
 442
 443         state->param = param;
 444         state->num_param = num_param;
 445         state->param_sent = 0;
 446         state->rparam.max = max_param;
 447
 448         state->data = data;
 449         state->num_data = num_data;
 450         state->data_sent = 0;
 451         state->rdata.max = max_data;
 452
 453         cli_trans_format(state, &wct, &iov_count);
 454
 455         subreq = cli_smb_req_create(state, ev, cli, cmd, 0, wct, state->vwv,
 456                                     iov_count, state->iov);
 457         if (tevent_req_nomem(subreq, req)) {
 458                 return tevent_req_post(req, ev);
 459         }
 460         status = cli_smb_req_send(subreq);
 461         if (!NT_STATUS_IS_OK(status)) {
 462                 tevent_req_nterror(req, status);
 463                 return tevent_req_post(req, state->ev);
 464         }
 465         tevent_req_set_callback(subreq, cli_trans_done, req);
 466
 467         /*
 468          * Now get the MID of the primary request
 469          * and mark it as persistent. This means
 470          * we will able to send and receive multiple
 471          * SMB pdus using this MID in both directions
 472          * (including correct SMB signing).
 473          */
 474         state->mid = cli_smb_req_mid(subreq);
 475         cli_smb_req_set_mid(subreq, state->mid);
 476         state->primary_subreq = subreq;
 477         talloc_set_destructor(state, cli_trans_state_destructor);
 478
 479         return req;
 480 }
 481
 482 static void cli_trans_done2(struct tevent_req *subreq);
 483
 484 static void cli_trans_done(struct tevent_req *subreq)
 485 {
 486         struct tevent_req *req = tevent_req_callback_data(
 487                 subreq, struct tevent_req);
 488         struct cli_trans_state *state = tevent_req_data(
 489                 req, struct cli_trans_state);
 490         NTSTATUS status;
 491         bool sent_all;
 492         uint8_t wct;
 493         uint16_t *vwv;
 494         uint32_t num_bytes;
 495         uint8_t *bytes;
 496         uint8_t *inbuf;
 497         uint8_t num_setup       = 0;
 498         uint16_t *setup         = NULL;
 499         uint32_t total_param    = 0;
 500         uint32_t num_param      = 0;
 501         uint32_t param_disp     = 0;
 502         uint32_t total_data     = 0;
 503         uint32_t num_data       = 0;
 504         uint32_t data_disp      = 0;
 505         uint8_t *param          = NULL;
 506         uint8_t *data           = NULL;
 507
 508         status = cli_smb_recv(subreq, state, &inbuf, 0, &wct, &vwv,
 509                               &num_bytes, &bytes);
 510         /*
 511          * Do not TALLOC_FREE(subreq) here, we might receive more than
 512          * one response for the same mid.
 513          */
 514
 515         /*
 516          * We can receive something like STATUS_MORE_ENTRIES, so don't use
 517          * !NT_STATUS_IS_OK(status) here.
 518          */
 519
 520         if (NT_STATUS_IS_ERR(status)) {
 521                 goto fail;
 522         }
 523
 524         sent_all = ((state->param_sent == state->num_param)
 525                     && (state->data_sent == state->num_data));
 526
 527         status = cli_pull_trans(
 528                 inbuf, wct, vwv, num_bytes, bytes,
 529                 state->cmd, !sent_all, &num_setup, &setup,
 530                 &total_param, &num_param, &param_disp, &param,
 531                 &total_data, &num_data, &data_disp, &data);
 532
 533         if (!NT_STATUS_IS_OK(status)) {
 534                 goto fail;
 535         }
 536
 537         if (!sent_all) {
 538                 int iov_count;
 539                 struct tevent_req *subreq2;
 540
 541                 cli_trans_format(state, &wct, &iov_count);
 542
 543                 subreq2 = cli_smb_req_create(state, state->ev, state->cli,
 544                                              state->cmd + 1, 0, wct, state->vwv,
 545                                              iov_count, state->iov);
 546                 if (tevent_req_nomem(subreq2, req)) {
 547                         return;
 548                 }
 549                 cli_smb_req_set_mid(subreq2, state->mid);
 550
 551                 status = cli_smb_req_send(subreq2);
 552
 553                 if (!NT_STATUS_IS_OK(status)) {
 554                         goto fail;
 555                 }
 556                 tevent_req_set_callback(subreq2, cli_trans_done2, req);
 557
 558                 return;
 559         }
 560
 561         status = cli_trans_pull_blob(
 562                 state, &state->rparam, total_param, num_param, param,
 563                 param_disp);
 564
 565         if (!NT_STATUS_IS_OK(status)) {
 566                 DEBUG(10, ("Pulling params failed: %s\n", nt_errstr(status)));
 567                 goto fail;
 568         }
 569
 570         status = cli_trans_pull_blob(
 571                 state, &state->rdata, total_data, num_data, data,
 572                 data_disp);
 573
 574         if (!NT_STATUS_IS_OK(status)) {
 575                 DEBUG(10, ("Pulling data failed: %s\n", nt_errstr(status)));
 576                 goto fail;
 577         }
 578
 579         if ((state->rparam.total == state->rparam.received)
 580             && (state->rdata.total == state->rdata.received)) {
 581                 state->recv_flags2 = SVAL(inbuf, smb_flg2);
 582                 cli_trans_cleanup_primary(state);
 583                 tevent_req_done(req);
 584                 return;
 585         }
 586
 587         TALLOC_FREE(inbuf);
 588
 589         return;
 590
 591  fail:
 592         cli_trans_cleanup_primary(state);
 593         tevent_req_nterror(req, status);
 594 }
 595
 596 static void cli_trans_done2(struct tevent_req *subreq2)
 597 {
 598         struct tevent_req *req = tevent_req_callback_data(
 599                 subreq2, struct tevent_req);
 600         struct cli_trans_state *state = tevent_req_data(
 601                 req, struct cli_trans_state);
 602         NTSTATUS status;
 603         bool sent_all;
 604         uint8_t wct;
 605         uint32_t seqnum;
 606
 607         /*
 608          * First backup the seqnum of the secondary request
 609          * and attach it to the primary request.
 610          */
 611         seqnum = cli_smb_req_seqnum(subreq2);
 612         cli_smb_req_set_seqnum(state->primary_subreq, seqnum);
 613
 614         status = cli_smb_recv(subreq2, state, NULL, 0, &wct, NULL,
 615                               NULL, NULL);
 616         TALLOC_FREE(subreq2);
 617
 618         if (!NT_STATUS_IS_OK(status)) {
 619                 goto fail;
 620         }
 621
 622         if (wct != 0) {
 623                 status = NT_STATUS_INVALID_NETWORK_RESPONSE;
 624                 goto fail;
 625         }
 626
 627         sent_all = ((state->param_sent == state->num_param)
 628                     && (state->data_sent == state->num_data));
 629
 630         if (!sent_all) {
 631                 int iov_count;
 632
 633                 cli_trans_format(state, &wct, &iov_count);
 634
 635                 subreq2 = cli_smb_req_create(state, state->ev, state->cli,
 636                                              state->cmd + 1, 0, wct, state->vwv,
 637                                              iov_count, state->iov);
 638                 if (tevent_req_nomem(subreq2, req)) {
 639                         return;
 640                 }
 641                 cli_smb_req_set_mid(subreq2, state->mid);
 642
 643                 status = cli_smb_req_send(subreq2);
 644
 645                 if (!NT_STATUS_IS_OK(status)) {
 646                         goto fail;
 647                 }
 648                 tevent_req_set_callback(subreq2, cli_trans_done2, req);
 649                 return;
 650         }
 651
 652         return;
 653
 654  fail:
 655         cli_trans_cleanup_primary(state);
 656         tevent_req_nterror(req, status);
 657 }
 658
 659 NTSTATUS cli_trans_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
 660                         uint16_t *recv_flags2,
 661                         uint16_t **setup, uint8_t min_setup,
 662                         uint8_t *num_setup,
 663                         uint8_t **param, uint32_t min_param,
 664                         uint32_t *num_param,
 665                         uint8_t **data, uint32_t min_data,
 666                         uint32_t *num_data)
 667 {
 668         struct cli_trans_state *state = tevent_req_data(
 669                 req, struct cli_trans_state);
 670         NTSTATUS status;
 671
 672         cli_trans_cleanup_primary(state);
 673
 674         if (tevent_req_is_nterror(req, &status)) {
 675                 return status;
 676         }
 677
 678         if ((state->num_rsetup < min_setup)
 679             || (state->rparam.total < min_param)
 680             || (state->rdata.total < min_data)) {
 681                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
 682         }
 683
 684         if (recv_flags2 != NULL) {
 685                 *recv_flags2 = state->recv_flags2;
 686         }
 687
 688         if (setup != NULL) {
 689                 *setup = talloc_move(mem_ctx, &state->rsetup);
 690                 *num_setup = state->num_rsetup;
 691         } else {
 692                 TALLOC_FREE(state->rsetup);
 693         }
 694
 695         if (param != NULL) {
 696                 *param = talloc_move(mem_ctx, &state->rparam.data);
 697                 *num_param = state->rparam.total;
 698         } else {
 699                 TALLOC_FREE(state->rparam.data);
 700         }
 701
 702         if (data != NULL) {
 703                 *data = talloc_move(mem_ctx, &state->rdata.data);
 704                 *num_data = state->rdata.total;
 705         } else {
 706                 TALLOC_FREE(state->rdata.data);
 707         }
 708
 709         return NT_STATUS_OK;
 710 }
 711
 712 NTSTATUS cli_trans(TALLOC_CTX *mem_ctx, struct cli_state *cli,
 713                    uint8_t trans_cmd,
 714                    const char *pipe_name, uint16_t fid, uint16_t function,
 715                    int flags,
 716                    uint16_t *setup, uint8_t num_setup, uint8_t max_setup,
 717                    uint8_t *param, uint32_t num_param, uint32_t max_param,
 718                    uint8_t *data, uint32_t num_data, uint32_t max_data,
 719                    uint16_t *recv_flags2,
 720                    uint16_t **rsetup, uint8_t min_rsetup, uint8_t *num_rsetup,
 721                    uint8_t **rparam, uint32_t min_rparam, uint32_t *num_rparam,
 722                    uint8_t **rdata, uint32_t min_rdata, uint32_t *num_rdata)
 723 {
 724         TALLOC_CTX *frame = talloc_stackframe();
 725         struct event_context *ev;
 726         struct tevent_req *req;
 727         NTSTATUS status = NT_STATUS_OK;
 728
 729         if (cli_has_async_calls(cli)) {
 730                 /*
 731                  * Can't use sync call while an async call is in flight
 732                  */
 733                 status = NT_STATUS_INVALID_PARAMETER;
 734                 goto fail;
 735         }
 736
 737         ev = event_context_init(frame);
 738         if (ev == NULL) {
 739                 status = NT_STATUS_NO_MEMORY;
 740                 goto fail;
 741         }
 742
 743         req = cli_trans_send(frame, ev, cli, trans_cmd,
 744                              pipe_name, fid, function, flags,
 745                              setup, num_setup, max_setup,
 746                              param, num_param, max_param,
 747                              data, num_data, max_data);
 748         if (req == NULL) {
 749                 status = NT_STATUS_NO_MEMORY;
 750                 goto fail;
 751         }
 752
 753         if (!tevent_req_poll(req, ev)) {
 754                 status = map_nt_error_from_unix(errno);
 755                 goto fail;
 756         }
 757
 758         status = cli_trans_recv(req, mem_ctx, recv_flags2,
 759                                 rsetup, min_rsetup, num_rsetup,
 760                                 rparam, min_rparam, num_rparam,
 761                                 rdata, min_rdata, num_rdata);
 762  fail:
 763         TALLOC_FREE(frame);
 764         return status;
 765 }