source3/libsmb/cli_np_tstream.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Copyright (C) Stefan Metzmacher 2010
   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 "system/network.h"
  22 #include "../lib/util/tevent_ntstatus.h"
  23 #include "../lib/tsocket/tsocket.h"
  24 #include "../lib/tsocket/tsocket_internal.h"
  25 #include "cli_np_tstream.h"
  26
  27 static const struct tstream_context_ops tstream_cli_np_ops;
  28
  29 /*
  30  * Window uses 1024 hardcoded for read size and trans max data
  31  */
  32 #define TSTREAM_CLI_NP_BUF_SIZE 1024
  33
  34 struct tstream_cli_np {
  35         struct cli_state *cli;
  36         const char *npipe;
  37         uint16_t fnum;
  38         unsigned int default_timeout;
  39
  40         struct {
  41                 bool active;
  42                 struct tevent_req *read_req;
  43                 struct tevent_req *write_req;
  44                 uint16_t setup[2];
  45         } trans;
  46
  47         struct {
  48                 off_t ofs;
  49                 size_t left;
  50                 uint8_t buf[TSTREAM_CLI_NP_BUF_SIZE];
  51         } read, write;
  52 };
  53
  54 static int tstream_cli_np_destructor(struct tstream_cli_np *cli_nps)
  55 {
  56         NTSTATUS status;
  57
  58         if (!cli_state_is_connected(cli_nps->cli)) {
  59                 return 0;
  60         }
  61
  62         /*
  63          * TODO: do not use a sync call with a destructor!!!
  64          *
  65          * This only happens, if a caller does talloc_free(),
  66          * while the everything was still ok.
  67          *
  68          * If we get an unexpected failure within a normal
  69          * operation, we already do an async cli_close_send()/_recv().
  70          *
  71          * Once we've fixed all callers to call
  72          * tstream_disconnect_send()/_recv(), this will
  73          * never be called.
  74          */
  75         status = cli_close(cli_nps->cli, cli_nps->fnum);
  76         if (!NT_STATUS_IS_OK(status)) {
  77                 DEBUG(1, ("tstream_cli_np_destructor: cli_close "
  78                           "failed on pipe %s. Error was %s\n",
  79                           cli_nps->npipe, nt_errstr(status)));
  80         }
  81         /*
  82          * We can't do much on failure
  83          */
  84         return 0;
  85 }
  86
  87 struct tstream_cli_np_open_state {
  88         struct cli_state *cli;
  89         uint16_t fnum;
  90         const char *npipe;
  91 };
  92
  93 static void tstream_cli_np_open_done(struct tevent_req *subreq);
  94
  95 struct tevent_req *tstream_cli_np_open_send(TALLOC_CTX *mem_ctx,
  96                                             struct tevent_context *ev,
  97                                             struct cli_state *cli,
  98                                             const char *npipe)
  99 {
 100         struct tevent_req *req;
 101         struct tstream_cli_np_open_state *state;
 102         struct tevent_req *subreq;
 103
 104         req = tevent_req_create(mem_ctx, &state,
 105                                 struct tstream_cli_np_open_state);
 106         if (!req) {
 107                 return NULL;
 108         }
 109         state->cli = cli;
 110
 111         state->npipe = talloc_strdup(state, npipe);
 112         if (tevent_req_nomem(state->npipe, req)) {
 113                 return tevent_req_post(req, ev);
 114         }
 115
 116         subreq = cli_ntcreate_send(state, ev, cli,
 117                                    npipe,
 118                                    0,
 119                                    DESIRED_ACCESS_PIPE,
 120                                    0,
 121                                    FILE_SHARE_READ|FILE_SHARE_WRITE,
 122                                    FILE_OPEN,
 123                                    0,
 124                                    0);
 125         if (tevent_req_nomem(subreq, req)) {
 126                 return tevent_req_post(req, ev);
 127         }
 128         tevent_req_set_callback(subreq, tstream_cli_np_open_done, req);
 129
 130         return req;
 131 }
 132
 133 static void tstream_cli_np_open_done(struct tevent_req *subreq)
 134 {
 135         struct tevent_req *req =
 136                 tevent_req_callback_data(subreq, struct tevent_req);
 137         struct tstream_cli_np_open_state *state =
 138                 tevent_req_data(req, struct tstream_cli_np_open_state);
 139         NTSTATUS status;
 140
 141         status = cli_ntcreate_recv(subreq, &state->fnum);
 142         TALLOC_FREE(subreq);
 143         if (!NT_STATUS_IS_OK(status)) {
 144                 tevent_req_nterror(req, status);
 145                 return;
 146         }
 147
 148         tevent_req_done(req);
 149 }
 150
 151 NTSTATUS _tstream_cli_np_open_recv(struct tevent_req *req,
 152                                    TALLOC_CTX *mem_ctx,
 153                                    struct tstream_context **_stream,
 154                                    const char *location)
 155 {
 156         struct tstream_cli_np_open_state *state =
 157                 tevent_req_data(req, struct tstream_cli_np_open_state);
 158         struct tstream_context *stream;
 159         struct tstream_cli_np *cli_nps;
 160         NTSTATUS status;
 161
 162         if (tevent_req_is_nterror(req, &status)) {
 163                 tevent_req_received(req);
 164                 return status;
 165         }
 166
 167         stream = tstream_context_create(mem_ctx,
 168                                         &tstream_cli_np_ops,
 169                                         &cli_nps,
 170                                         struct tstream_cli_np,
 171                                         location);
 172         if (!stream) {
 173                 tevent_req_received(req);
 174                 return NT_STATUS_NO_MEMORY;
 175         }
 176         ZERO_STRUCTP(cli_nps);
 177
 178         cli_nps->cli = state->cli;
 179         cli_nps->npipe = talloc_move(cli_nps, &state->npipe);
 180         cli_nps->fnum = state->fnum;
 181         cli_nps->default_timeout = state->cli->timeout;
 182
 183         talloc_set_destructor(cli_nps, tstream_cli_np_destructor);
 184
 185         cli_nps->trans.active = false;
 186         cli_nps->trans.read_req = NULL;
 187         cli_nps->trans.write_req = NULL;
 188         SSVAL(cli_nps->trans.setup+0, 0, TRANSACT_DCERPCCMD);
 189         SSVAL(cli_nps->trans.setup+1, 0, cli_nps->fnum);
 190
 191         *_stream = stream;
 192         tevent_req_received(req);
 193         return NT_STATUS_OK;
 194 }
 195
 196 static ssize_t tstream_cli_np_pending_bytes(struct tstream_context *stream)
 197 {
 198         struct tstream_cli_np *cli_nps = tstream_context_data(stream,
 199                                          struct tstream_cli_np);
 200
 201         if (!cli_state_is_connected(cli_nps->cli)) {
 202                 errno = ENOTCONN;
 203                 return -1;
 204         }
 205
 206         return cli_nps->read.left;
 207 }
 208
 209 bool tstream_is_cli_np(struct tstream_context *stream)
 210 {
 211         struct tstream_cli_np *cli_nps =
 212                 talloc_get_type(_tstream_context_data(stream),
 213                 struct tstream_cli_np);
 214
 215         if (!cli_nps) {
 216                 return false;
 217         }
 218
 219         return true;
 220 }
 221
 222 NTSTATUS tstream_cli_np_use_trans(struct tstream_context *stream)
 223 {
 224         struct tstream_cli_np *cli_nps = tstream_context_data(stream,
 225                                          struct tstream_cli_np);
 226
 227         if (cli_nps->trans.read_req) {
 228                 return NT_STATUS_PIPE_BUSY;
 229         }
 230
 231         if (cli_nps->trans.write_req) {
 232                 return NT_STATUS_PIPE_BUSY;
 233         }
 234
 235         if (cli_nps->trans.active) {
 236                 return NT_STATUS_PIPE_BUSY;
 237         }
 238
 239         cli_nps->trans.active = true;
 240
 241         return NT_STATUS_OK;
 242 }
 243
 244 unsigned int tstream_cli_np_set_timeout(struct tstream_context *stream,
 245                                         unsigned int timeout)
 246 {
 247         struct tstream_cli_np *cli_nps = tstream_context_data(stream,
 248                                          struct tstream_cli_np);
 249
 250         if (!cli_state_is_connected(cli_nps->cli)) {
 251                 return cli_nps->default_timeout;
 252         }
 253
 254         return cli_set_timeout(cli_nps->cli, timeout);
 255 }
 256
 257 struct cli_state *tstream_cli_np_get_cli_state(struct tstream_context *stream)
 258 {
 259         struct tstream_cli_np *cli_nps = tstream_context_data(stream,
 260                                          struct tstream_cli_np);
 261
 262         return cli_nps->cli;
 263 }
 264
 265 struct tstream_cli_np_writev_state {
 266         struct tstream_context *stream;
 267         struct tevent_context *ev;
 268
 269         struct iovec *vector;
 270         size_t count;
 271
 272         int ret;
 273
 274         struct {
 275                 int val;
 276                 const char *location;
 277         } error;
 278 };
 279
 280 static int tstream_cli_np_writev_state_destructor(struct tstream_cli_np_writev_state *state)
 281 {
 282         struct tstream_cli_np *cli_nps =
 283                 tstream_context_data(state->stream,
 284                 struct tstream_cli_np);
 285
 286         cli_nps->trans.write_req = NULL;
 287
 288         return 0;
 289 }
 290
 291 static void tstream_cli_np_writev_write_next(struct tevent_req *req);
 292
 293 static struct tevent_req *tstream_cli_np_writev_send(TALLOC_CTX *mem_ctx,
 294                                         struct tevent_context *ev,
 295                                         struct tstream_context *stream,
 296                                         const struct iovec *vector,
 297                                         size_t count)
 298 {
 299         struct tevent_req *req;
 300         struct tstream_cli_np_writev_state *state;
 301         struct tstream_cli_np *cli_nps = tstream_context_data(stream,
 302                                          struct tstream_cli_np);
 303
 304         req = tevent_req_create(mem_ctx, &state,
 305                                 struct tstream_cli_np_writev_state);
 306         if (!req) {
 307                 return NULL;
 308         }
 309         state->stream = stream;
 310         state->ev = ev;
 311         state->ret = 0;
 312
 313         talloc_set_destructor(state, tstream_cli_np_writev_state_destructor);
 314
 315         if (!cli_state_is_connected(cli_nps->cli)) {
 316                 tevent_req_error(req, ENOTCONN);
 317                 return tevent_req_post(req, ev);
 318         }
 319
 320         /*
 321          * we make a copy of the vector so we can change the structure
 322          */
 323         state->vector = talloc_array(state, struct iovec, count);
 324         if (tevent_req_nomem(state->vector, req)) {
 325                 return tevent_req_post(req, ev);
 326         }
 327         memcpy(state->vector, vector, sizeof(struct iovec) * count);
 328         state->count = count;
 329
 330         tstream_cli_np_writev_write_next(req);
 331         if (!tevent_req_is_in_progress(req)) {
 332                 return tevent_req_post(req, ev);
 333         }
 334
 335         return req;
 336 }
 337
 338 static void tstream_cli_np_readv_trans_start(struct tevent_req *req);
 339 static void tstream_cli_np_writev_write_done(struct tevent_req *subreq);
 340
 341 static void tstream_cli_np_writev_write_next(struct tevent_req *req)
 342 {
 343         struct tstream_cli_np_writev_state *state =
 344                 tevent_req_data(req,
 345                 struct tstream_cli_np_writev_state);
 346         struct tstream_cli_np *cli_nps =
 347                 tstream_context_data(state->stream,
 348                 struct tstream_cli_np);
 349         struct tevent_req *subreq;
 350
 351         cli_nps->write.ofs = 0;
 352         cli_nps->write.left = TSTREAM_CLI_NP_BUF_SIZE;
 353
 354         /*
 355          * copy the pending buffer first
 356          */
 357         while (cli_nps->write.left > 0 && state->count > 0) {
 358                 uint8_t *base = (uint8_t *)state->vector[0].iov_base;
 359                 size_t len = MIN(cli_nps->write.left, state->vector[0].iov_len);
 360
 361                 memcpy(cli_nps->write.buf + cli_nps->write.ofs, base, len);
 362
 363                 base += len;
 364                 state->vector[0].iov_base = base;
 365                 state->vector[0].iov_len -= len;
 366
 367                 cli_nps->write.ofs += len;
 368                 cli_nps->write.left -= len;
 369
 370                 if (state->vector[0].iov_len == 0) {
 371                         state->vector += 1;
 372                         state->count -= 1;
 373                 }
 374
 375                 state->ret += len;
 376         }
 377
 378         if (cli_nps->write.ofs == 0) {
 379                 tevent_req_done(req);
 380                 return;
 381         }
 382
 383         if (cli_nps->trans.active && state->count == 0) {
 384                 cli_nps->trans.active = false;
 385                 cli_nps->trans.write_req = req;
 386                 return;
 387         }
 388
 389         if (cli_nps->trans.read_req && state->count == 0) {
 390                 cli_nps->trans.write_req = req;
 391                 tstream_cli_np_readv_trans_start(cli_nps->trans.read_req);
 392                 return;
 393         }
 394
 395         subreq = cli_write_andx_send(state, state->ev, cli_nps->cli,
 396                                      cli_nps->fnum,
 397                                      8, /* 8 means message mode. */
 398                                      cli_nps->write.buf, 0,
 399                                      cli_nps->write.ofs);
 400         if (tevent_req_nomem(subreq, req)) {
 401                 return;
 402         }
 403         tevent_req_set_callback(subreq,
 404                                 tstream_cli_np_writev_write_done,
 405                                 req);
 406 }
 407
 408 static void tstream_cli_np_writev_disconnect_now(struct tevent_req *req,
 409                                                  int error,
 410                                                  const char *location);
 411
 412 static void tstream_cli_np_writev_write_done(struct tevent_req *subreq)
 413 {
 414         struct tevent_req *req =
 415                 tevent_req_callback_data(subreq, struct tevent_req);
 416         struct tstream_cli_np_writev_state *state =
 417                 tevent_req_data(req, struct tstream_cli_np_writev_state);
 418         struct tstream_cli_np *cli_nps =
 419                 tstream_context_data(state->stream,
 420                 struct tstream_cli_np);
 421         size_t written;
 422         NTSTATUS status;
 423
 424         status = cli_write_andx_recv(subreq, &written);
 425         TALLOC_FREE(subreq);
 426         if (!NT_STATUS_IS_OK(status)) {
 427                 tstream_cli_np_writev_disconnect_now(req, EIO, __location__);
 428                 return;
 429         }
 430
 431         if (written != cli_nps->write.ofs) {
 432                 tstream_cli_np_writev_disconnect_now(req, EIO, __location__);
 433                 return;
 434         }
 435
 436         tstream_cli_np_writev_write_next(req);
 437 }
 438
 439 static void tstream_cli_np_writev_disconnect_done(struct tevent_req *subreq);
 440
 441 static void tstream_cli_np_writev_disconnect_now(struct tevent_req *req,
 442                                                  int error,
 443                                                  const char *location)
 444 {
 445         struct tstream_cli_np_writev_state *state =
 446                 tevent_req_data(req,
 447                 struct tstream_cli_np_writev_state);
 448         struct tstream_cli_np *cli_nps =
 449                 tstream_context_data(state->stream,
 450                 struct tstream_cli_np);
 451         struct tevent_req *subreq;
 452
 453         state->error.val = error;
 454         state->error.location = location;
 455
 456         if (!cli_state_is_connected(cli_nps->cli)) {
 457                 /* return the original error */
 458                 _tevent_req_error(req, state->error.val, state->error.location);
 459                 return;
 460         }
 461
 462         subreq = cli_close_send(state, state->ev, cli_nps->cli, cli_nps->fnum);
 463         if (subreq == NULL) {
 464                 /* return the original error */
 465                 _tevent_req_error(req, state->error.val, state->error.location);
 466                 return;
 467         }
 468         tevent_req_set_callback(subreq,
 469                                 tstream_cli_np_writev_disconnect_done,
 470                                 req);
 471 }
 472
 473 static void tstream_cli_np_writev_disconnect_done(struct tevent_req *subreq)
 474 {
 475         struct tevent_req *req =
 476                 tevent_req_callback_data(subreq, struct tevent_req);
 477         struct tstream_cli_np_writev_state *state =
 478                 tevent_req_data(req, struct tstream_cli_np_writev_state);
 479         struct tstream_cli_np *cli_nps =
 480                 tstream_context_data(state->stream, struct tstream_cli_np);
 481         NTSTATUS status;
 482
 483         status = cli_close_recv(subreq);
 484         TALLOC_FREE(subreq);
 485
 486         cli_nps->cli = NULL;
 487
 488         /* return the original error */
 489         _tevent_req_error(req, state->error.val, state->error.location);
 490 }
 491
 492 static int tstream_cli_np_writev_recv(struct tevent_req *req,
 493                                       int *perrno)
 494 {
 495         struct tstream_cli_np_writev_state *state =
 496                 tevent_req_data(req,
 497                 struct tstream_cli_np_writev_state);
 498         int ret;
 499
 500         ret = tsocket_simple_int_recv(req, perrno);
 501         if (ret == 0) {
 502                 ret = state->ret;
 503         }
 504
 505         tevent_req_received(req);
 506         return ret;
 507 }
 508
 509 struct tstream_cli_np_readv_state {
 510         struct tstream_context *stream;
 511         struct tevent_context *ev;
 512
 513         struct iovec *vector;
 514         size_t count;
 515
 516         int ret;
 517
 518         struct {
 519                 struct tevent_immediate *im;
 520         } trans;
 521
 522         struct {
 523                 int val;
 524                 const char *location;
 525         } error;
 526 };
 527
 528 static int tstream_cli_np_readv_state_destructor(struct tstream_cli_np_readv_state *state)
 529 {
 530         struct tstream_cli_np *cli_nps =
 531                 tstream_context_data(state->stream,
 532                 struct tstream_cli_np);
 533
 534         cli_nps->trans.read_req = NULL;
 535
 536         return 0;
 537 }
 538
 539 static void tstream_cli_np_readv_read_next(struct tevent_req *req);
 540
 541 static struct tevent_req *tstream_cli_np_readv_send(TALLOC_CTX *mem_ctx,
 542                                         struct tevent_context *ev,
 543                                         struct tstream_context *stream,
 544                                         struct iovec *vector,
 545                                         size_t count)
 546 {
 547         struct tevent_req *req;
 548         struct tstream_cli_np_readv_state *state;
 549         struct tstream_cli_np *cli_nps =
 550                 tstream_context_data(stream, struct tstream_cli_np);
 551
 552         req = tevent_req_create(mem_ctx, &state,
 553                                 struct tstream_cli_np_readv_state);
 554         if (!req) {
 555                 return NULL;
 556         }
 557         state->stream = stream;
 558         state->ev = ev;
 559         state->ret = 0;
 560
 561         talloc_set_destructor(state, tstream_cli_np_readv_state_destructor);
 562
 563         if (!cli_state_is_connected(cli_nps->cli)) {
 564                 tevent_req_error(req, ENOTCONN);
 565                 return tevent_req_post(req, ev);
 566         }
 567
 568         /*
 569          * we make a copy of the vector so we can change the structure
 570          */
 571         state->vector = talloc_array(state, struct iovec, count);
 572         if (tevent_req_nomem(state->vector, req)) {
 573                 return tevent_req_post(req, ev);
 574         }
 575         memcpy(state->vector, vector, sizeof(struct iovec) * count);
 576         state->count = count;
 577
 578         tstream_cli_np_readv_read_next(req);
 579         if (!tevent_req_is_in_progress(req)) {
 580                 return tevent_req_post(req, ev);
 581         }
 582
 583         return req;
 584 }
 585
 586 static void tstream_cli_np_readv_read_done(struct tevent_req *subreq);
 587
 588 static void tstream_cli_np_readv_read_next(struct tevent_req *req)
 589 {
 590         struct tstream_cli_np_readv_state *state =
 591                 tevent_req_data(req,
 592                 struct tstream_cli_np_readv_state);
 593         struct tstream_cli_np *cli_nps =
 594                 tstream_context_data(state->stream,
 595                 struct tstream_cli_np);
 596         struct tevent_req *subreq;
 597
 598         /*
 599          * copy the pending buffer first
 600          */
 601         while (cli_nps->read.left > 0 && state->count > 0) {
 602                 uint8_t *base = (uint8_t *)state->vector[0].iov_base;
 603                 size_t len = MIN(cli_nps->read.left, state->vector[0].iov_len);
 604
 605                 memcpy(base, cli_nps->read.buf + cli_nps->read.ofs, len);
 606
 607                 base += len;
 608                 state->vector[0].iov_base = base;
 609                 state->vector[0].iov_len -= len;
 610
 611                 cli_nps->read.ofs += len;
 612                 cli_nps->read.left -= len;
 613
 614                 if (state->vector[0].iov_len == 0) {
 615                         state->vector += 1;
 616                         state->count -= 1;
 617                 }
 618
 619                 state->ret += len;
 620         }
 621
 622         if (state->count == 0) {
 623                 tevent_req_done(req);
 624                 return;
 625         }
 626
 627         if (cli_nps->trans.active) {
 628                 cli_nps->trans.active = false;
 629                 cli_nps->trans.read_req = req;
 630                 return;
 631         }
 632
 633         if (cli_nps->trans.write_req) {
 634                 cli_nps->trans.read_req = req;
 635                 tstream_cli_np_readv_trans_start(req);
 636                 return;
 637         }
 638
 639         subreq = cli_read_andx_send(state, state->ev, cli_nps->cli,
 640                                     cli_nps->fnum, 0, TSTREAM_CLI_NP_BUF_SIZE);
 641         if (tevent_req_nomem(subreq, req)) {
 642                 return;
 643         }
 644         tevent_req_set_callback(subreq,
 645                                 tstream_cli_np_readv_read_done,
 646                                 req);
 647 }
 648
 649 static void tstream_cli_np_readv_trans_done(struct tevent_req *subreq);
 650
 651 static void tstream_cli_np_readv_trans_start(struct tevent_req *req)
 652 {
 653         struct tstream_cli_np_readv_state *state =
 654                 tevent_req_data(req,
 655                 struct tstream_cli_np_readv_state);
 656         struct tstream_cli_np *cli_nps =
 657                 tstream_context_data(state->stream,
 658                 struct tstream_cli_np);
 659         struct tevent_req *subreq;
 660
 661         state->trans.im = tevent_create_immediate(state);
 662         if (tevent_req_nomem(state->trans.im, req)) {
 663                 return;
 664         }
 665
 666         subreq = cli_trans_send(state, state->ev,
 667                                 cli_nps->cli,
 668                                 SMBtrans,
 669                                 "\\PIPE\\",
 670                                 0, 0, 0,
 671                                 cli_nps->trans.setup, 2,
 672                                 0,
 673                                 NULL, 0, 0,
 674                                 cli_nps->write.buf,
 675                                 cli_nps->write.ofs,
 676                                 TSTREAM_CLI_NP_BUF_SIZE);
 677         if (tevent_req_nomem(subreq, req)) {
 678                 return;
 679         }
 680         tevent_req_set_callback(subreq,
 681                                 tstream_cli_np_readv_trans_done,
 682                                 req);
 683 }
 684
 685 static void tstream_cli_np_readv_disconnect_now(struct tevent_req *req,
 686                                                 int error,
 687                                                 const char *location);
 688 static void tstream_cli_np_readv_trans_next(struct tevent_context *ctx,
 689                                             struct tevent_immediate *im,
 690                                             void *private_data);
 691
 692 static void tstream_cli_np_readv_trans_done(struct tevent_req *subreq)
 693 {
 694         struct tevent_req *req =
 695                 tevent_req_callback_data(subreq, struct tevent_req);
 696         struct tstream_cli_np_readv_state *state =
 697                 tevent_req_data(req, struct tstream_cli_np_readv_state);
 698         struct tstream_cli_np *cli_nps =
 699                 tstream_context_data(state->stream, struct tstream_cli_np);
 700         uint8_t *rcvbuf;
 701         uint32_t received;
 702         NTSTATUS status;
 703
 704         status = cli_trans_recv(subreq, state, NULL, NULL, 0, NULL,
 705                                 NULL, 0, NULL,
 706                                 &rcvbuf, 0, &received);
 707         TALLOC_FREE(subreq);
 708         if (NT_STATUS_EQUAL(status, NT_STATUS_BUFFER_TOO_SMALL)) {
 709                 status = NT_STATUS_OK;
 710         }
 711         if (!NT_STATUS_IS_OK(status)) {
 712                 tstream_cli_np_readv_disconnect_now(req, EIO, __location__);
 713                 return;
 714         }
 715
 716         if (received > TSTREAM_CLI_NP_BUF_SIZE) {
 717                 tstream_cli_np_readv_disconnect_now(req, EIO, __location__);
 718                 return;
 719         }
 720
 721         if (received == 0) {
 722                 tstream_cli_np_readv_disconnect_now(req, EPIPE, __location__);
 723                 return;
 724         }
 725
 726         cli_nps->read.ofs = 0;
 727         cli_nps->read.left = received;
 728         memcpy(cli_nps->read.buf, rcvbuf, received);
 729         TALLOC_FREE(rcvbuf);
 730
 731         if (cli_nps->trans.write_req == NULL) {
 732                 tstream_cli_np_readv_read_next(req);
 733                 return;
 734         }
 735
 736         tevent_schedule_immediate(state->trans.im, state->ev,
 737                                   tstream_cli_np_readv_trans_next, req);
 738
 739         tevent_req_done(cli_nps->trans.write_req);
 740 }
 741
 742 static void tstream_cli_np_readv_trans_next(struct tevent_context *ctx,
 743                                             struct tevent_immediate *im,
 744                                             void *private_data)
 745 {
 746         struct tevent_req *req =
 747                 talloc_get_type_abort(private_data,
 748                 struct tevent_req);
 749
 750         tstream_cli_np_readv_read_next(req);
 751 }
 752
 753 static void tstream_cli_np_readv_read_done(struct tevent_req *subreq)
 754 {
 755         struct tevent_req *req =
 756                 tevent_req_callback_data(subreq, struct tevent_req);
 757         struct tstream_cli_np_readv_state *state =
 758                 tevent_req_data(req, struct tstream_cli_np_readv_state);
 759         struct tstream_cli_np *cli_nps =
 760                 tstream_context_data(state->stream, struct tstream_cli_np);
 761         uint8_t *rcvbuf;
 762         ssize_t received;
 763         NTSTATUS status;
 764
 765         /*
 766          * We must free subreq in this function as there is
 767          * a timer event attached to it.
 768          */
 769
 770         status = cli_read_andx_recv(subreq, &received, &rcvbuf);
 771         /*
 772          * We can't TALLOC_FREE(subreq) as usual here, as rcvbuf still is a
 773          * child of that.
 774          */
 775         if (NT_STATUS_EQUAL(status, NT_STATUS_BUFFER_TOO_SMALL)) {
 776                 /*
 777                  * NT_STATUS_BUFFER_TOO_SMALL means that there's
 778                  * more data to read when the named pipe is used
 779                  * in message mode (which is the case here).
 780                  *
 781                  * But we hide this from the caller.
 782                  */
 783                 status = NT_STATUS_OK;
 784         }
 785         if (!NT_STATUS_IS_OK(status)) {
 786                 TALLOC_FREE(subreq);
 787                 tstream_cli_np_readv_disconnect_now(req, EIO, __location__);
 788                 return;
 789         }
 790
 791         if (received > TSTREAM_CLI_NP_BUF_SIZE) {
 792                 TALLOC_FREE(subreq);
 793                 tstream_cli_np_readv_disconnect_now(req, EIO, __location__);
 794                 return;
 795         }
 796
 797         if (received == 0) {
 798                 TALLOC_FREE(subreq);
 799                 tstream_cli_np_readv_disconnect_now(req, EPIPE, __location__);
 800                 return;
 801         }
 802
 803         cli_nps->read.ofs = 0;
 804         cli_nps->read.left = received;
 805         memcpy(cli_nps->read.buf, rcvbuf, received);
 806         TALLOC_FREE(subreq);
 807
 808         tstream_cli_np_readv_read_next(req);
 809 }
 810
 811 static void tstream_cli_np_readv_disconnect_done(struct tevent_req *subreq);
 812
 813 static void tstream_cli_np_readv_error(struct tevent_req *req);
 814
 815 static void tstream_cli_np_readv_disconnect_now(struct tevent_req *req,
 816                                                 int error,
 817                                                 const char *location)
 818 {
 819         struct tstream_cli_np_readv_state *state =
 820                 tevent_req_data(req,
 821                 struct tstream_cli_np_readv_state);
 822         struct tstream_cli_np *cli_nps =
 823                 tstream_context_data(state->stream,
 824                 struct tstream_cli_np);
 825         struct tevent_req *subreq;
 826
 827         state->error.val = error;
 828         state->error.location = location;
 829
 830         if (!cli_state_is_connected(cli_nps->cli)) {
 831                 /* return the original error */
 832                 tstream_cli_np_readv_error(req);
 833                 return;
 834         }
 835
 836         subreq = cli_close_send(state, state->ev, cli_nps->cli, cli_nps->fnum);
 837         if (subreq == NULL) {
 838                 /* return the original error */
 839                 tstream_cli_np_readv_error(req);
 840                 return;
 841         }
 842         tevent_req_set_callback(subreq,
 843                                 tstream_cli_np_readv_disconnect_done,
 844                                 req);
 845 }
 846
 847 static void tstream_cli_np_readv_disconnect_done(struct tevent_req *subreq)
 848 {
 849         struct tevent_req *req =
 850                 tevent_req_callback_data(subreq, struct tevent_req);
 851         struct tstream_cli_np_readv_state *state =
 852                 tevent_req_data(req, struct tstream_cli_np_readv_state);
 853         struct tstream_cli_np *cli_nps =
 854                 tstream_context_data(state->stream, struct tstream_cli_np);
 855         NTSTATUS status;
 856
 857         status = cli_close_recv(subreq);
 858         TALLOC_FREE(subreq);
 859
 860         cli_nps->cli = NULL;
 861
 862         tstream_cli_np_readv_error(req);
 863 }
 864
 865 static void tstream_cli_np_readv_error_trigger(struct tevent_context *ctx,
 866                                                struct tevent_immediate *im,
 867                                                void *private_data);
 868
 869 static void tstream_cli_np_readv_error(struct tevent_req *req)
 870 {
 871         struct tstream_cli_np_readv_state *state =
 872                 tevent_req_data(req,
 873                 struct tstream_cli_np_readv_state);
 874         struct tstream_cli_np *cli_nps =
 875                 tstream_context_data(state->stream,
 876                 struct tstream_cli_np);
 877
 878         if (cli_nps->trans.write_req == NULL) {
 879                 /* return the original error */
 880                 _tevent_req_error(req, state->error.val, state->error.location);
 881                 return;
 882         }
 883
 884         if (state->trans.im == NULL) {
 885                 /* return the original error */
 886                 _tevent_req_error(req, state->error.val, state->error.location);
 887                 return;
 888         }
 889
 890         tevent_schedule_immediate(state->trans.im, state->ev,
 891                                   tstream_cli_np_readv_error_trigger, req);
 892
 893         /* return the original error for writev */
 894         _tevent_req_error(cli_nps->trans.write_req,
 895                           state->error.val, state->error.location);
 896 }
 897
 898 static void tstream_cli_np_readv_error_trigger(struct tevent_context *ctx,
 899                                                struct tevent_immediate *im,
 900                                                void *private_data)
 901 {
 902         struct tevent_req *req =
 903                 talloc_get_type_abort(private_data,
 904                 struct tevent_req);
 905         struct tstream_cli_np_readv_state *state =
 906                 tevent_req_data(req,
 907                 struct tstream_cli_np_readv_state);
 908
 909         /* return the original error */
 910         _tevent_req_error(req, state->error.val, state->error.location);
 911 }
 912
 913 static int tstream_cli_np_readv_recv(struct tevent_req *req,
 914                                    int *perrno)
 915 {
 916         struct tstream_cli_np_readv_state *state =
 917                 tevent_req_data(req, struct tstream_cli_np_readv_state);
 918         int ret;
 919
 920         ret = tsocket_simple_int_recv(req, perrno);
 921         if (ret == 0) {
 922                 ret = state->ret;
 923         }
 924
 925         tevent_req_received(req);
 926         return ret;
 927 }
 928
 929 struct tstream_cli_np_disconnect_state {
 930         struct tstream_context *stream;
 931 };
 932
 933 static void tstream_cli_np_disconnect_done(struct tevent_req *subreq);
 934
 935 static struct tevent_req *tstream_cli_np_disconnect_send(TALLOC_CTX *mem_ctx,
 936                                                 struct tevent_context *ev,
 937                                                 struct tstream_context *stream)
 938 {
 939         struct tstream_cli_np *cli_nps = tstream_context_data(stream,
 940                                          struct tstream_cli_np);
 941         struct tevent_req *req;
 942         struct tstream_cli_np_disconnect_state *state;
 943         struct tevent_req *subreq;
 944
 945         req = tevent_req_create(mem_ctx, &state,
 946                                 struct tstream_cli_np_disconnect_state);
 947         if (req == NULL) {
 948                 return NULL;
 949         }
 950
 951         state->stream = stream;
 952
 953         if (!cli_state_is_connected(cli_nps->cli)) {
 954                 tevent_req_error(req, ENOTCONN);
 955                 return tevent_req_post(req, ev);
 956         }
 957
 958         subreq = cli_close_send(state, ev, cli_nps->cli, cli_nps->fnum);
 959         if (tevent_req_nomem(subreq, req)) {
 960                 return tevent_req_post(req, ev);
 961         }
 962         tevent_req_set_callback(subreq, tstream_cli_np_disconnect_done, req);
 963
 964         return req;
 965 }
 966
 967 static void tstream_cli_np_disconnect_done(struct tevent_req *subreq)
 968 {
 969         struct tevent_req *req = tevent_req_callback_data(subreq,
 970                                                           struct tevent_req);
 971         struct tstream_cli_np_disconnect_state *state =
 972                 tevent_req_data(req, struct tstream_cli_np_disconnect_state);
 973         struct tstream_cli_np *cli_nps =
 974                 tstream_context_data(state->stream, struct tstream_cli_np);
 975         NTSTATUS status;
 976
 977         status = cli_close_recv(subreq);
 978         TALLOC_FREE(subreq);
 979         if (!NT_STATUS_IS_OK(status)) {
 980                 tevent_req_error(req, EIO);
 981                 return;
 982         }
 983
 984         cli_nps->cli = NULL;
 985
 986         tevent_req_done(req);
 987 }
 988
 989 static int tstream_cli_np_disconnect_recv(struct tevent_req *req,
 990                                           int *perrno)
 991 {
 992         int ret;
 993
 994         ret = tsocket_simple_int_recv(req, perrno);
 995
 996         tevent_req_received(req);
 997         return ret;
 998 }
 999
1000 static const struct tstream_context_ops tstream_cli_np_ops = {
1001         .name                   = "cli_np",
1002
1003         .pending_bytes          = tstream_cli_np_pending_bytes,
1004
1005         .readv_send             = tstream_cli_np_readv_send,
1006         .readv_recv             = tstream_cli_np_readv_recv,
1007
1008         .writev_send            = tstream_cli_np_writev_send,
1009         .writev_recv            = tstream_cli_np_writev_recv,
1010
1011         .disconnect_send        = tstream_cli_np_disconnect_send,
1012         .disconnect_recv        = tstream_cli_np_disconnect_recv,
1013 };
1014
1015 NTSTATUS _tstream_cli_np_existing(TALLOC_CTX *mem_ctx,
1016                                   struct cli_state *cli,
1017                                   uint16_t fnum,
1018                                   struct tstream_context **_stream,
1019                                   const char *location)
1020 {
1021         struct tstream_context *stream;
1022         struct tstream_cli_np *cli_nps;
1023
1024         stream = tstream_context_create(mem_ctx,
1025                                         &tstream_cli_np_ops,
1026                                         &cli_nps,
1027                                         struct tstream_cli_np,
1028                                         location);
1029         if (!stream) {
1030                 return NT_STATUS_NO_MEMORY;
1031         }
1032         ZERO_STRUCTP(cli_nps);
1033
1034         cli_nps->cli = cli;
1035         cli_nps->fnum = fnum;
1036
1037         *_stream = stream;
1038         return NT_STATUS_OK;
1039 }