source3/rpc_server/rpc_server.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Generic infrstructure for RPC Daemons
   4    Copyright (C) Simo Sorce 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 "rpc_server/rpc_server.h"
  22 #include "rpc_dce.h"
  23 #include "librpc/gen_ndr/netlogon.h"
  24 #include "librpc/gen_ndr/auth.h"
  25 #include "lib/tsocket/tsocket.h"
  26 #include "libcli/named_pipe_auth/npa_tstream.h"
  27 #include "../auth/auth_sam_reply.h"
  28 #include "auth.h"
  29 #include "ntdomain.h"
  30
  31 #define SERVER_TCP_LOW_PORT  1024
  32 #define SERVER_TCP_HIGH_PORT 1300
  33
  34 static NTSTATUS auth_anonymous_session_info(TALLOC_CTX *mem_ctx,
  35                                             struct auth_session_info **session_info)
  36 {
  37         struct auth_session_info *i;
  38         struct auth_serversupplied_info *s;
  39         struct auth_user_info_dc *u;
  40         union netr_Validation val;
  41         NTSTATUS status;
  42
  43         i = talloc_zero(mem_ctx, struct auth_session_info);
  44         if (i == NULL) {
  45                 return NT_STATUS_NO_MEMORY;
  46         }
  47
  48         status = make_server_info_guest(i, &s);
  49         if (!NT_STATUS_IS_OK(status)) {
  50                 return status;
  51         }
  52
  53         i->security_token = s->security_token;
  54         i->session_key    = s->session_key;
  55
  56         val.sam3 = s->info3;
  57
  58         status = make_user_info_dc_netlogon_validation(mem_ctx,
  59                                                        "",
  60                                                        3,
  61                                                        &val,
  62                                                        &u);
  63         if (!NT_STATUS_IS_OK(status)) {
  64                 DEBUG(0, ("conversion of info3 into user_info_dc failed!\n"));
  65                 return status;
  66         }
  67         i->info = talloc_move(i, &u->info);
  68         talloc_free(u);
  69
  70         *session_info = i;
  71
  72         return NT_STATUS_OK;
  73 }
  74
  75 /* Creates a pipes_struct and initializes it with the information
  76  * sent from the client */
  77 static int make_server_pipes_struct(TALLOC_CTX *mem_ctx,
  78                                     const char *pipe_name,
  79                                     const struct ndr_syntax_id id,
  80                                     enum dcerpc_transport_t transport,
  81                                     bool ncalrpc_as_system,
  82                                     const char *client_address,
  83                                     const char *server_address,
  84                                     struct auth_session_info *session_info,
  85                                     struct pipes_struct **_p,
  86                                     int *perrno)
  87 {
  88         struct netr_SamInfo3 *info3;
  89         struct auth_user_info_dc *auth_user_info_dc;
  90         struct pipes_struct *p;
  91         struct auth_serversupplied_info *server_info;
  92         NTSTATUS status;
  93         bool ok;
  94
  95         p = talloc_zero(mem_ctx, struct pipes_struct);
  96         if (!p) {
  97                 *perrno = ENOMEM;
  98                 return -1;
  99         }
 100         p->syntax = id;
 101         p->transport = transport;
 102         p->ncalrpc_as_system = ncalrpc_as_system;
 103
 104         p->mem_ctx = talloc_named(p, 0, "pipe %s %p", pipe_name, p);
 105         if (!p->mem_ctx) {
 106                 TALLOC_FREE(p);
 107                 *perrno = ENOMEM;
 108                 return -1;
 109         }
 110
 111         ok = init_pipe_handles(p, &id);
 112         if (!ok) {
 113                 DEBUG(1, ("Failed to init handles\n"));
 114                 TALLOC_FREE(p);
 115                 *perrno = EINVAL;
 116                 return -1;
 117         }
 118
 119
 120         data_blob_free(&p->in_data.data);
 121         data_blob_free(&p->in_data.pdu);
 122
 123         p->endian = RPC_LITTLE_ENDIAN;
 124
 125         /* Fake up an auth_user_info_dc for now, to make an info3, to make the session_info structure */
 126         auth_user_info_dc = talloc_zero(p, struct auth_user_info_dc);
 127         if (!auth_user_info_dc) {
 128                 TALLOC_FREE(p);
 129                 *perrno = ENOMEM;
 130                 return -1;
 131         }
 132
 133         auth_user_info_dc->num_sids = session_info->security_token->num_sids;
 134         auth_user_info_dc->sids = session_info->security_token->sids;
 135         auth_user_info_dc->info = session_info->info;
 136         auth_user_info_dc->user_session_key = session_info->session_key;
 137
 138         /* This creates the input structure that make_server_info_info3 is looking for */
 139         status = auth_convert_user_info_dc_saminfo3(p, auth_user_info_dc,
 140                                                     &info3);
 141
 142         if (!NT_STATUS_IS_OK(status)) {
 143                 DEBUG(1, ("Failed to convert auth_user_info_dc into netr_SamInfo3\n"));
 144                 TALLOC_FREE(p);
 145                 *perrno = EINVAL;
 146                 return -1;
 147         }
 148
 149         status = make_server_info_info3(p,
 150                                         info3->base.account_name.string,
 151                                         info3->base.domain.string,
 152                                         &server_info, info3);
 153         if (!NT_STATUS_IS_OK(status)) {
 154                 DEBUG(1, ("Failed to init server info\n"));
 155                 TALLOC_FREE(p);
 156                 *perrno = EINVAL;
 157                 return -1;
 158         }
 159
 160         /*
 161          * Some internal functions need a local token to determine access to
 162          * resoutrces.
 163          */
 164         status = create_local_token(p, server_info, &session_info->session_key, &p->session_info);
 165         talloc_free(server_info);
 166         if (!NT_STATUS_IS_OK(status)) {
 167                 DEBUG(1, ("Failed to init local auth token\n"));
 168                 TALLOC_FREE(p);
 169                 *perrno = EINVAL;
 170                 return -1;
 171         }
 172
 173         /* Now override the session_info->security_token with the exact
 174          * security_token we were given from the other side,
 175          * regardless of what we just calculated */
 176         p->session_info->security_token = talloc_move(p->session_info, &session_info->security_token);
 177
 178         p->client_id = talloc_zero(p, struct client_address);
 179         if (!p->client_id) {
 180                 TALLOC_FREE(p);
 181                 *perrno = ENOMEM;
 182                 return -1;
 183         }
 184         strlcpy(p->client_id->addr,
 185                 client_address, sizeof(p->client_id->addr));
 186         p->client_id->name = talloc_strdup(p->client_id, client_address);
 187         if (p->client_id->name == NULL) {
 188                 TALLOC_FREE(p);
 189                 *perrno = ENOMEM;
 190                 return -1;
 191         }
 192
 193         if (server_address != NULL) {
 194                 p->server_id = talloc_zero(p, struct client_address);
 195                 if (p->client_id == NULL) {
 196                         TALLOC_FREE(p);
 197                         *perrno = ENOMEM;
 198                         return -1;
 199                 }
 200
 201                 strlcpy(p->server_id->addr,
 202                         server_address,
 203                         sizeof(p->server_id->addr));
 204
 205                 p->server_id->name = talloc_strdup(p->server_id,
 206                                                    server_address);
 207                 if (p->server_id->name == NULL) {
 208                         TALLOC_FREE(p);
 209                         *perrno = ENOMEM;
 210                         return -1;
 211                 }
 212         }
 213
 214         talloc_set_destructor(p, close_internal_rpc_pipe_hnd);
 215
 216         *_p = p;
 217         return 0;
 218 }
 219
 220 /* Start listening on the appropriate unix socket and setup all is needed to
 221  * dispatch requests to the pipes rpc implementation */
 222
 223 struct dcerpc_ncacn_listen_state {
 224         struct ndr_syntax_id syntax_id;
 225
 226         int fd;
 227         union {
 228                 char *name;
 229                 uint16_t port;
 230         } ep;
 231
 232         struct tevent_context *ev_ctx;
 233         struct messaging_context *msg_ctx;
 234         dcerpc_ncacn_disconnect_fn disconnect_fn;
 235 };
 236
 237 static void named_pipe_listener(struct tevent_context *ev,
 238                                 struct tevent_fd *fde,
 239                                 uint16_t flags,
 240                                 void *private_data);
 241
 242 bool setup_named_pipe_socket(const char *pipe_name,
 243                              struct tevent_context *ev_ctx)
 244 {
 245         struct dcerpc_ncacn_listen_state *state;
 246         struct tevent_fd *fde;
 247         char *np_dir;
 248
 249         state = talloc(ev_ctx, struct dcerpc_ncacn_listen_state);
 250         if (!state) {
 251                 DEBUG(0, ("Out of memory\n"));
 252                 return false;
 253         }
 254         state->ep.name = talloc_strdup(state, pipe_name);
 255         if (state->ep.name == NULL) {
 256                 DEBUG(0, ("Out of memory\n"));
 257                 goto out;
 258         }
 259         state->fd = -1;
 260
 261         np_dir = talloc_asprintf(state, "%s/np", lp_ncalrpc_dir());
 262         if (!np_dir) {
 263                 DEBUG(0, ("Out of memory\n"));
 264                 goto out;
 265         }
 266
 267         if (!directory_create_or_exist(np_dir, geteuid(), 0700)) {
 268                 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
 269                           np_dir, strerror(errno)));
 270                 goto out;
 271         }
 272
 273         state->fd = create_pipe_sock(np_dir, pipe_name, 0700);
 274         if (state->fd == -1) {
 275                 DEBUG(0, ("Failed to create pipe socket! [%s/%s]\n",
 276                           np_dir, pipe_name));
 277                 goto out;
 278         }
 279
 280         DEBUG(10, ("Openened pipe socket fd %d for %s\n",
 281                    state->fd, pipe_name));
 282
 283         fde = tevent_add_fd(ev_ctx,
 284                             state, state->fd, TEVENT_FD_READ,
 285                             named_pipe_listener, state);
 286         if (!fde) {
 287                 DEBUG(0, ("Failed to add event handler!\n"));
 288                 goto out;
 289         }
 290
 291         tevent_fd_set_auto_close(fde);
 292         return true;
 293
 294 out:
 295         if (state->fd != -1) {
 296                 close(state->fd);
 297         }
 298         TALLOC_FREE(state);
 299         return false;
 300 }
 301
 302 static void named_pipe_accept_function(const char *pipe_name, int fd);
 303
 304 static void named_pipe_listener(struct tevent_context *ev,
 305                                 struct tevent_fd *fde,
 306                                 uint16_t flags,
 307                                 void *private_data)
 308 {
 309         struct dcerpc_ncacn_listen_state *state =
 310                         talloc_get_type_abort(private_data,
 311                                               struct dcerpc_ncacn_listen_state);
 312         struct sockaddr_un sunaddr;
 313         socklen_t len;
 314         int sd = -1;
 315
 316         /* TODO: should we have a limit to the number of clients ? */
 317
 318         len = sizeof(sunaddr);
 319
 320         sd = accept(state->fd,
 321                     (struct sockaddr *)(void *)&sunaddr, &len);
 322
 323         if (sd == -1) {
 324                 if (errno != EINTR) {
 325                         DEBUG(6, ("Failed to get a valid socket [%s]\n",
 326                                   strerror(errno)));
 327                 }
 328                 return;
 329         }
 330
 331         DEBUG(6, ("Accepted socket %d\n", sd));
 332
 333         named_pipe_accept_function(state->ep.name, sd);
 334 }
 335
 336
 337 /* This is the core of the rpc server.
 338  * Accepts connections from clients and process requests using the appropriate
 339  * dispatcher table. */
 340
 341 struct named_pipe_client {
 342         const char *pipe_name;
 343         struct ndr_syntax_id pipe_id;
 344
 345         struct tevent_context *ev;
 346         struct messaging_context *msg_ctx;
 347
 348         uint16_t file_type;
 349         uint16_t device_state;
 350         uint64_t allocation_size;
 351
 352         struct tstream_context *tstream;
 353
 354         struct tsocket_address *client;
 355         char *client_name;
 356         struct tsocket_address *server;
 357         char *server_name;
 358         struct auth_session_info *session_info;
 359
 360         struct pipes_struct *p;
 361
 362         struct tevent_queue *write_queue;
 363
 364         struct iovec *iov;
 365         size_t count;
 366 };
 367
 368 static void named_pipe_accept_done(struct tevent_req *subreq);
 369
 370 static void named_pipe_accept_function(const char *pipe_name, int fd)
 371 {
 372         struct ndr_syntax_id syntax;
 373         struct named_pipe_client *npc;
 374         struct tstream_context *plain;
 375         struct tevent_req *subreq;
 376         bool ok;
 377         int ret;
 378
 379         ok = is_known_pipename(pipe_name, &syntax);
 380         if (!ok) {
 381                 DEBUG(1, ("Unknown pipe [%s]\n", pipe_name));
 382                 close(fd);
 383                 return;
 384         }
 385
 386         npc = talloc_zero(NULL, struct named_pipe_client);
 387         if (!npc) {
 388                 DEBUG(0, ("Out of memory!\n"));
 389                 close(fd);
 390                 return;
 391         }
 392         npc->pipe_name = pipe_name;
 393         npc->pipe_id = syntax;
 394         npc->ev = server_event_context();
 395         npc->msg_ctx = server_messaging_context();
 396
 397         /* make sure socket is in NON blocking state */
 398         ret = set_blocking(fd, false);
 399         if (ret != 0) {
 400                 DEBUG(2, ("Failed to make socket non-blocking\n"));
 401                 TALLOC_FREE(npc);
 402                 close(fd);
 403                 return;
 404         }
 405
 406         ret = tstream_bsd_existing_socket(npc, fd, &plain);
 407         if (ret != 0) {
 408                 DEBUG(2, ("Failed to create tstream socket\n"));
 409                 TALLOC_FREE(npc);
 410                 close(fd);
 411                 return;
 412         }
 413
 414         npc->file_type = FILE_TYPE_MESSAGE_MODE_PIPE;
 415         npc->device_state = 0xff | 0x0400 | 0x0100;
 416         npc->allocation_size = 4096;
 417
 418         subreq = tstream_npa_accept_existing_send(npc, npc->ev, plain,
 419                                                   npc->file_type,
 420                                                   npc->device_state,
 421                                                   npc->allocation_size);
 422         if (!subreq) {
 423                 DEBUG(2, ("Failed to start async accept procedure\n"));
 424                 TALLOC_FREE(npc);
 425                 close(fd);
 426                 return;
 427         }
 428         tevent_req_set_callback(subreq, named_pipe_accept_done, npc);
 429 }
 430
 431 static void named_pipe_packet_process(struct tevent_req *subreq);
 432 static void named_pipe_packet_done(struct tevent_req *subreq);
 433
 434 static void named_pipe_accept_done(struct tevent_req *subreq)
 435 {
 436         struct auth_session_info_transport *session_info_transport;
 437         struct named_pipe_client *npc =
 438                 tevent_req_callback_data(subreq, struct named_pipe_client);
 439         const char *cli_addr;
 440         int error;
 441         int ret;
 442
 443         ret = tstream_npa_accept_existing_recv(subreq, &error, npc,
 444                                                 &npc->tstream,
 445                                                 &npc->client,
 446                                                 &npc->client_name,
 447                                                 &npc->server,
 448                                                 &npc->server_name,
 449                                                 &session_info_transport);
 450
 451         npc->session_info = talloc_move(npc, &session_info_transport->session_info);
 452
 453         TALLOC_FREE(subreq);
 454         if (ret != 0) {
 455                 DEBUG(2, ("Failed to accept named pipe connection! (%s)\n",
 456                           strerror(error)));
 457                 TALLOC_FREE(npc);
 458                 return;
 459         }
 460
 461         if (tsocket_address_is_inet(npc->client, "ip")) {
 462                 cli_addr = tsocket_address_inet_addr_string(npc->client,
 463                                                             subreq);
 464                 if (cli_addr == NULL) {
 465                         TALLOC_FREE(npc);
 466                         return;
 467                 }
 468         } else {
 469                 cli_addr = "";
 470         }
 471
 472         ret = make_server_pipes_struct(npc,
 473                                         npc->pipe_name, npc->pipe_id, NCACN_NP,
 474                                         false, cli_addr, NULL, npc->session_info,
 475                                         &npc->p, &error);
 476         if (ret != 0) {
 477                 DEBUG(2, ("Failed to create pipes_struct! (%s)\n",
 478                           strerror(error)));
 479                 goto fail;
 480         }
 481         npc->p->msg_ctx = npc->msg_ctx;
 482
 483         npc->write_queue = tevent_queue_create(npc, "np_server_write_queue");
 484         if (!npc->write_queue) {
 485                 DEBUG(2, ("Failed to set up write queue!\n"));
 486                 goto fail;
 487         }
 488
 489         /* And now start receiving and processing packets */
 490         subreq = dcerpc_read_ncacn_packet_send(npc, npc->ev, npc->tstream);
 491         if (!subreq) {
 492                 DEBUG(2, ("Failed to start receving packets\n"));
 493                 goto fail;
 494         }
 495         tevent_req_set_callback(subreq, named_pipe_packet_process, npc);
 496         return;
 497
 498 fail:
 499         DEBUG(2, ("Fatal error. Terminating client(%s) connection!\n",
 500                   npc->client_name));
 501         /* terminate client connection */
 502         talloc_free(npc);
 503         return;
 504 }
 505
 506 static void named_pipe_packet_process(struct tevent_req *subreq)
 507 {
 508         struct named_pipe_client *npc =
 509                 tevent_req_callback_data(subreq, struct named_pipe_client);
 510         struct _output_data *out = &npc->p->out_data;
 511         DATA_BLOB recv_buffer = data_blob_null;
 512         struct ncacn_packet *pkt;
 513         NTSTATUS status;
 514         ssize_t data_left;
 515         ssize_t data_used;
 516         char *data;
 517         uint32_t to_send;
 518         bool ok;
 519
 520         status = dcerpc_read_ncacn_packet_recv(subreq, npc, &pkt, &recv_buffer);
 521         TALLOC_FREE(subreq);
 522         if (!NT_STATUS_IS_OK(status)) {
 523                 goto fail;
 524         }
 525
 526         data_left = recv_buffer.length;
 527         data = (char *)recv_buffer.data;
 528
 529         while (data_left) {
 530
 531                 data_used = process_incoming_data(npc->p, data, data_left);
 532                 if (data_used < 0) {
 533                         DEBUG(3, ("Failed to process dceprc request!\n"));
 534                         status = NT_STATUS_UNEXPECTED_IO_ERROR;
 535                         goto fail;
 536                 }
 537
 538                 data_left -= data_used;
 539                 data += data_used;
 540         }
 541
 542         /* Do not leak this buffer, npc is a long lived context */
 543         talloc_free(recv_buffer.data);
 544         talloc_free(pkt);
 545
 546         /* this is needed because of the way DCERPC Binds work in
 547          * the RPC marshalling code */
 548         to_send = out->frag.length - out->current_pdu_sent;
 549         if (to_send > 0) {
 550
 551                 DEBUG(10, ("Current_pdu_len = %u, "
 552                            "current_pdu_sent = %u "
 553                            "Returning %u bytes\n",
 554                            (unsigned int)out->frag.length,
 555                            (unsigned int)out->current_pdu_sent,
 556                            (unsigned int)to_send));
 557
 558                 npc->iov = talloc_zero(npc, struct iovec);
 559                 if (!npc->iov) {
 560                         status = NT_STATUS_NO_MEMORY;
 561                         goto fail;
 562                 }
 563                 npc->count = 1;
 564
 565                 npc->iov[0].iov_base = out->frag.data
 566                                         + out->current_pdu_sent;
 567                 npc->iov[0].iov_len = to_send;
 568
 569                 out->current_pdu_sent += to_send;
 570         }
 571
 572         /* this condition is false for bind packets, or when we haven't
 573          * yet got a full request, and need to wait for more data from
 574          * the client */
 575         while (out->data_sent_length < out->rdata.length) {
 576
 577                 ok = create_next_pdu(npc->p);
 578                 if (!ok) {
 579                         DEBUG(3, ("Failed to create next PDU!\n"));
 580                         status = NT_STATUS_UNEXPECTED_IO_ERROR;
 581                         goto fail;
 582                 }
 583
 584                 npc->iov = talloc_realloc(npc, npc->iov,
 585                                             struct iovec, npc->count + 1);
 586                 if (!npc->iov) {
 587                         status = NT_STATUS_NO_MEMORY;
 588                         goto fail;
 589                 }
 590
 591                 npc->iov[npc->count].iov_base = out->frag.data;
 592                 npc->iov[npc->count].iov_len = out->frag.length;
 593
 594                 DEBUG(10, ("PDU number: %d, PDU Length: %u\n",
 595                            (unsigned int)npc->count,
 596                            (unsigned int)npc->iov[npc->count].iov_len));
 597                 dump_data(11, (const uint8_t *)npc->iov[npc->count].iov_base,
 598                                 npc->iov[npc->count].iov_len);
 599                 npc->count++;
 600         }
 601
 602         /* we still don't have a complete request, go back and wait for more
 603          * data */
 604         if (npc->count == 0) {
 605                 /* Wait for the next packet */
 606                 subreq = dcerpc_read_ncacn_packet_send(npc, npc->ev, npc->tstream);
 607                 if (!subreq) {
 608                         DEBUG(2, ("Failed to start receving packets\n"));
 609                         status = NT_STATUS_NO_MEMORY;
 610                         goto fail;
 611                 }
 612                 tevent_req_set_callback(subreq, named_pipe_packet_process, npc);
 613                 return;
 614         }
 615
 616         DEBUG(10, ("Sending a total of %u bytes\n",
 617                    (unsigned int)npc->p->out_data.data_sent_length));
 618
 619         subreq = tstream_writev_queue_send(npc, npc->ev,
 620                                            npc->tstream,
 621                                            npc->write_queue,
 622                                            npc->iov, npc->count);
 623         if (!subreq) {
 624                 DEBUG(2, ("Failed to send packet\n"));
 625                 status = NT_STATUS_NO_MEMORY;
 626                 goto fail;
 627         }
 628         tevent_req_set_callback(subreq, named_pipe_packet_done, npc);
 629         return;
 630
 631 fail:
 632         DEBUG(2, ("Fatal error(%s). "
 633                   "Terminating client(%s) connection!\n",
 634                   nt_errstr(status), npc->client_name));
 635         /* terminate client connection */
 636         talloc_free(npc);
 637         return;
 638 }
 639
 640 static void named_pipe_packet_done(struct tevent_req *subreq)
 641 {
 642         struct named_pipe_client *npc =
 643                 tevent_req_callback_data(subreq, struct named_pipe_client);
 644         int sys_errno;
 645         int ret;
 646
 647         ret = tstream_writev_queue_recv(subreq, &sys_errno);
 648         TALLOC_FREE(subreq);
 649         if (ret == -1) {
 650                 DEBUG(2, ("Writev failed!\n"));
 651                 goto fail;
 652         }
 653
 654         /* clear out any data that may have been left around */
 655         npc->count = 0;
 656         TALLOC_FREE(npc->iov);
 657         data_blob_free(&npc->p->in_data.data);
 658         data_blob_free(&npc->p->out_data.frag);
 659         data_blob_free(&npc->p->out_data.rdata);
 660
 661         /* Wait for the next packet */
 662         subreq = dcerpc_read_ncacn_packet_send(npc, npc->ev, npc->tstream);
 663         if (!subreq) {
 664                 DEBUG(2, ("Failed to start receving packets\n"));
 665                 sys_errno = ENOMEM;
 666                 goto fail;
 667         }
 668         tevent_req_set_callback(subreq, named_pipe_packet_process, npc);
 669         return;
 670
 671 fail:
 672         DEBUG(2, ("Fatal error(%s). "
 673                   "Terminating client(%s) connection!\n",
 674                   strerror(sys_errno), npc->client_name));
 675         /* terminate client connection */
 676         talloc_free(npc);
 677         return;
 678 }
 679
 680 static void dcerpc_ncacn_accept(struct tevent_context *ev_ctx,
 681                                 struct messaging_context *msg_ctx,
 682                                 struct ndr_syntax_id syntax_id,
 683                                 enum dcerpc_transport_t transport,
 684                                 const char *name,
 685                                 uint16_t port,
 686                                 struct tsocket_address *cli_addr,
 687                                 struct tsocket_address *srv_addr,
 688                                 int s,
 689                                 dcerpc_ncacn_disconnect_fn fn);
 690
 691 /********************************************************************
 692  * Start listening on the tcp/ip socket
 693  ********************************************************************/
 694
 695 static void dcerpc_ncacn_tcpip_listener(struct tevent_context *ev,
 696                                         struct tevent_fd *fde,
 697                                         uint16_t flags,
 698                                         void *private_data);
 699
 700 uint16_t setup_dcerpc_ncacn_tcpip_socket(struct tevent_context *ev_ctx,
 701                                          struct messaging_context *msg_ctx,
 702                                          struct ndr_syntax_id syntax_id,
 703                                          const struct sockaddr_storage *ifss,
 704                                          uint16_t port)
 705 {
 706         struct dcerpc_ncacn_listen_state *state;
 707         struct tevent_fd *fde;
 708         int rc;
 709
 710         state = talloc(ev_ctx, struct dcerpc_ncacn_listen_state);
 711         if (state == NULL) {
 712                 DEBUG(0, ("setup_dcerpc_ncacn_tcpip_socket: Out of memory\n"));
 713                 return 0;
 714         }
 715
 716         state->syntax_id = syntax_id;
 717         state->fd = -1;
 718         state->ep.port = port;
 719         state->disconnect_fn = NULL;
 720
 721         if (state->ep.port == 0) {
 722                 uint16_t i;
 723
 724                 for (i = SERVER_TCP_LOW_PORT; i <= SERVER_TCP_HIGH_PORT; i++) {
 725                         state->fd = open_socket_in(SOCK_STREAM,
 726                                                    i,
 727                                                    0,
 728                                                    ifss,
 729                                                    false);
 730                         if (state->fd > 0) {
 731                                 state->ep.port = i;
 732                                 break;
 733                         }
 734                 }
 735         } else {
 736                 state->fd = open_socket_in(SOCK_STREAM,
 737                                            state->ep.port,
 738                                            0,
 739                                            ifss,
 740                                            true);
 741         }
 742         if (state->fd == -1) {
 743                 DEBUG(0, ("setup_dcerpc_ncacn_tcpip_socket: Failed to create "
 744                           "socket on port %u!\n", state->ep.port));
 745                 goto out;
 746         }
 747
 748         state->ev_ctx = ev_ctx;
 749         state->msg_ctx = msg_ctx;
 750
 751         /* ready to listen */
 752         set_socket_options(state->fd, "SO_KEEPALIVE");
 753         set_socket_options(state->fd, lp_socket_options());
 754
 755         /* Set server socket to non-blocking for the accept. */
 756         set_blocking(state->fd, false);
 757
 758         rc = listen(state->fd, SMBD_LISTEN_BACKLOG);
 759         if (rc == -1) {
 760                 DEBUG(0,("setup_tcpip_socket: listen - %s\n", strerror(errno)));
 761                 goto out;
 762         }
 763
 764         DEBUG(10, ("setup_tcpip_socket: openened socket fd %d for port %u\n",
 765                    state->fd, state->ep.port));
 766
 767         fde = tevent_add_fd(state->ev_ctx,
 768                             state,
 769                             state->fd,
 770                             TEVENT_FD_READ,
 771                             dcerpc_ncacn_tcpip_listener,
 772                             state);
 773         if (fde == NULL) {
 774                 DEBUG(0, ("setup_tcpip_socket: Failed to add event handler!\n"));
 775                 goto out;
 776         }
 777
 778         tevent_fd_set_auto_close(fde);
 779
 780         return state->ep.port;
 781 out:
 782         if (state->fd != -1) {
 783                 close(state->fd);
 784         }
 785         TALLOC_FREE(state);
 786
 787         return 0;
 788 }
 789
 790 static void dcerpc_ncacn_tcpip_listener(struct tevent_context *ev,
 791                                         struct tevent_fd *fde,
 792                                         uint16_t flags,
 793                                         void *private_data)
 794 {
 795         struct dcerpc_ncacn_listen_state *state =
 796                         talloc_get_type_abort(private_data,
 797                                               struct dcerpc_ncacn_listen_state);
 798         struct tsocket_address *cli_addr = NULL;
 799         struct tsocket_address *srv_addr = NULL;
 800         struct sockaddr_storage addr;
 801         socklen_t in_addrlen = sizeof(addr);
 802         int s = -1;
 803         int rc;
 804
 805         s = accept(state->fd, (struct sockaddr *)(void *) &addr, &in_addrlen);
 806         if (s == -1) {
 807                 if (errno != EINTR) {
 808                         DEBUG(0,("tcpip_listener accept: %s\n",
 809                                  strerror(errno)));
 810                 }
 811                 return;
 812         }
 813
 814         rc = tsocket_address_bsd_from_sockaddr(state,
 815                                                (struct sockaddr *)(void *) &addr,
 816                                                in_addrlen,
 817                                                &cli_addr);
 818         if (rc < 0) {
 819                 close(s);
 820                 return;
 821         }
 822
 823         rc = getsockname(s, (struct sockaddr *)(void *) &addr, &in_addrlen);
 824         if (rc < 0) {
 825                 close(s);
 826                 return;
 827         }
 828
 829         rc = tsocket_address_bsd_from_sockaddr(state,
 830                                                (struct sockaddr *)(void *) &addr,
 831                                                in_addrlen,
 832                                                &srv_addr);
 833         if (rc < 0) {
 834                 close(s);
 835                 return;
 836         }
 837
 838         DEBUG(6, ("tcpip_listener: Accepted socket %d\n", s));
 839
 840         dcerpc_ncacn_accept(state->ev_ctx,
 841                             state->msg_ctx,
 842                             state->syntax_id,
 843                             NCACN_IP_TCP,
 844                             NULL,
 845                             state->ep.port,
 846                             cli_addr,
 847                             srv_addr,
 848                             s,
 849                             NULL);
 850 }
 851
 852 /********************************************************************
 853  * Start listening on the ncalrpc socket
 854  ********************************************************************/
 855
 856 static void dcerpc_ncalrpc_listener(struct tevent_context *ev,
 857                                     struct tevent_fd *fde,
 858                                     uint16_t flags,
 859                                     void *private_data);
 860
 861 bool setup_dcerpc_ncalrpc_socket(struct tevent_context *ev_ctx,
 862                                  struct messaging_context *msg_ctx,
 863                                  struct ndr_syntax_id syntax_id,
 864                                  const char *name,
 865                                  dcerpc_ncacn_disconnect_fn fn)
 866 {
 867         struct dcerpc_ncacn_listen_state *state;
 868         struct tevent_fd *fde;
 869
 870         state = talloc(ev_ctx, struct dcerpc_ncacn_listen_state);
 871         if (state == NULL) {
 872                 DEBUG(0, ("Out of memory\n"));
 873                 return false;
 874         }
 875
 876         state->syntax_id = syntax_id;
 877         state->fd = -1;
 878         state->disconnect_fn = fn;
 879
 880         if (name == NULL) {
 881                 name = "DEFAULT";
 882         }
 883         state->ep.name = talloc_strdup(state, name);
 884
 885         if (state->ep.name == NULL) {
 886                 DEBUG(0, ("Out of memory\n"));
 887                 talloc_free(state);
 888                 return false;
 889         }
 890
 891         if (!directory_create_or_exist(lp_ncalrpc_dir(), geteuid(), 0700)) {
 892                 DEBUG(0, ("Failed to create pipe directory %s - %s\n",
 893                           lp_ncalrpc_dir(), strerror(errno)));
 894                 goto out;
 895         }
 896
 897         state->fd = create_pipe_sock(lp_ncalrpc_dir(), name, 0700);
 898         if (state->fd == -1) {
 899                 DEBUG(0, ("Failed to create pipe socket! [%s/%s]\n",
 900                           lp_ncalrpc_dir(), name));
 901                 goto out;
 902         }
 903
 904         DEBUG(10, ("Openened pipe socket fd %d for %s\n", state->fd, name));
 905
 906         state->ev_ctx = ev_ctx;
 907         state->msg_ctx = msg_ctx;
 908
 909         /* Set server socket to non-blocking for the accept. */
 910         set_blocking(state->fd, false);
 911
 912         fde = tevent_add_fd(state->ev_ctx,
 913                             state,
 914                             state->fd,
 915                             TEVENT_FD_READ,
 916                             dcerpc_ncalrpc_listener,
 917                             state);
 918         if (fde == NULL) {
 919                 DEBUG(0, ("Failed to add event handler for ncalrpc!\n"));
 920                 goto out;
 921         }
 922
 923         tevent_fd_set_auto_close(fde);
 924
 925         return true;
 926 out:
 927         if (state->fd != -1) {
 928                 close(state->fd);
 929         }
 930         TALLOC_FREE(state);
 931
 932         return 0;
 933 }
 934
 935 static void dcerpc_ncalrpc_listener(struct tevent_context *ev,
 936                                         struct tevent_fd *fde,
 937                                         uint16_t flags,
 938                                         void *private_data)
 939 {
 940         struct dcerpc_ncacn_listen_state *state =
 941                         talloc_get_type_abort(private_data,
 942                                               struct dcerpc_ncacn_listen_state);
 943         struct tsocket_address *cli_addr = NULL;
 944         struct sockaddr_un sunaddr;
 945         struct sockaddr *addr = (struct sockaddr *)(void *)&sunaddr;
 946         socklen_t len = sizeof(sunaddr);
 947         int sd = -1;
 948         int rc;
 949
 950         ZERO_STRUCT(sunaddr);
 951
 952         sd = accept(state->fd, addr, &len);
 953         if (sd == -1) {
 954                 if (errno != EINTR) {
 955                         DEBUG(0, ("ncalrpc accept() failed: %s\n", strerror(errno)));
 956                 }
 957                 return;
 958         }
 959
 960         rc = tsocket_address_bsd_from_sockaddr(state,
 961                                                addr, len,
 962                                                &cli_addr);
 963         if (rc < 0) {
 964                 close(sd);
 965                 return;
 966         }
 967
 968         DEBUG(10, ("Accepted ncalrpc socket %d\n", sd));
 969
 970         dcerpc_ncacn_accept(state->ev_ctx,
 971                             state->msg_ctx,
 972                             state->syntax_id, NCALRPC,
 973                             state->ep.name, 0,
 974                             cli_addr, NULL, sd,
 975                             state->disconnect_fn);
 976 }
 977
 978 struct dcerpc_ncacn_conn {
 979         struct ndr_syntax_id syntax_id;
 980
 981         enum dcerpc_transport_t transport;
 982
 983         union {
 984                 const char *name;
 985                 uint16_t port;
 986         } ep;
 987
 988         int sock;
 989
 990         struct pipes_struct *p;
 991         dcerpc_ncacn_disconnect_fn disconnect_fn;
 992
 993         struct tevent_context *ev_ctx;
 994         struct messaging_context *msg_ctx;
 995
 996         struct tstream_context *tstream;
 997         struct tevent_queue *send_queue;
 998
 999         struct tsocket_address *client;
1000         char *client_name;
1001         struct tsocket_address *server;
1002         char *server_name;
1003         struct auth_session_info *session_info;
1004
1005         struct iovec *iov;
1006         size_t count;
1007 };
1008
1009 static void dcerpc_ncacn_packet_process(struct tevent_req *subreq);
1010 static void dcerpc_ncacn_packet_done(struct tevent_req *subreq);
1011
1012 static void dcerpc_ncacn_accept(struct tevent_context *ev_ctx,
1013                                 struct messaging_context *msg_ctx,
1014                                 struct ndr_syntax_id syntax_id,
1015                                 enum dcerpc_transport_t transport,
1016                                 const char *name,
1017                                 uint16_t port,
1018                                 struct tsocket_address *cli_addr,
1019                                 struct tsocket_address *srv_addr,
1020                                 int s,
1021                                 dcerpc_ncacn_disconnect_fn fn) {
1022         struct dcerpc_ncacn_conn *ncacn_conn;
1023         struct tevent_req *subreq;
1024         const char *cli_str;
1025         const char *srv_str = NULL;
1026         bool system_user = false;
1027         char *pipe_name;
1028         NTSTATUS status;
1029         int sys_errno;
1030         uid_t uid;
1031         int rc;
1032
1033         DEBUG(10, ("dcerpc_ncacn_accept\n"));
1034
1035         ncacn_conn = talloc_zero(ev_ctx, struct dcerpc_ncacn_conn);
1036         if (ncacn_conn == NULL) {
1037                 DEBUG(0, ("Out of memory!\n"));
1038                 close(s);
1039                 return;
1040         }
1041
1042         ncacn_conn->transport = transport;
1043         ncacn_conn->syntax_id = syntax_id;
1044         ncacn_conn->ev_ctx = ev_ctx;
1045         ncacn_conn->msg_ctx = msg_ctx;
1046         ncacn_conn->sock = s;
1047         ncacn_conn->disconnect_fn = fn;
1048
1049         ncacn_conn->client = talloc_move(ncacn_conn, &cli_addr);
1050         if (tsocket_address_is_inet(ncacn_conn->client, "ip")) {
1051                 ncacn_conn->client_name =
1052                         tsocket_address_inet_addr_string(ncacn_conn->client,
1053                                                          ncacn_conn);
1054         } else {
1055                 ncacn_conn->client_name =
1056                         tsocket_address_unix_path(ncacn_conn->client,
1057                                                   ncacn_conn);
1058         }
1059         if (ncacn_conn->client_name == NULL) {
1060                 DEBUG(0, ("Out of memory!\n"));
1061                 talloc_free(ncacn_conn);
1062                 close(s);
1063                 return;
1064         }
1065
1066         if (srv_addr != NULL) {
1067                 ncacn_conn->server = talloc_move(ncacn_conn, &srv_addr);
1068
1069                 ncacn_conn->server_name =
1070                         tsocket_address_inet_addr_string(ncacn_conn->server,
1071                                                          ncacn_conn);
1072                 if (ncacn_conn->server_name == NULL) {
1073                         DEBUG(0, ("Out of memory!\n"));
1074                         talloc_free(ncacn_conn);
1075                         close(s);
1076                         return;
1077                 }
1078         }
1079
1080         switch (transport) {
1081                 case NCACN_IP_TCP:
1082                         ncacn_conn->ep.port = port;
1083
1084                         pipe_name = tsocket_address_string(ncacn_conn->client,
1085                                                            ncacn_conn);
1086                         if (pipe_name == NULL) {
1087                                 close(s);
1088                                 talloc_free(ncacn_conn);
1089                                 return;
1090                         }
1091
1092                         break;
1093                 case NCALRPC:
1094                         rc = sys_getpeereid(s, &uid);
1095                         if (rc < 0) {
1096                                 DEBUG(2, ("Failed to get ncalrpc connecting uid!"));
1097                         } else {
1098                                 if (uid == sec_initial_uid()) {
1099                                         system_user = true;
1100                                 }
1101                         }
1102                 case NCACN_NP:
1103                         ncacn_conn->ep.name = talloc_strdup(ncacn_conn, name);
1104                         if (ncacn_conn->ep.name == NULL) {
1105                                 close(s);
1106                                 talloc_free(ncacn_conn);
1107                                 return;
1108                         }
1109
1110                         pipe_name = talloc_strdup(ncacn_conn,
1111                                                   name);
1112                         if (pipe_name == NULL) {
1113                                 close(s);
1114                                 talloc_free(ncacn_conn);
1115                                 return;
1116                         }
1117                         break;
1118                 default:
1119                         DEBUG(0, ("unknown dcerpc transport: %u!\n",
1120                                   transport));
1121                         talloc_free(ncacn_conn);
1122                         close(s);
1123                         return;
1124         }
1125
1126         rc = set_blocking(s, false);
1127         if (rc < 0) {
1128                 DEBUG(2, ("Failed to set dcerpc socket to non-blocking\n"));
1129                 talloc_free(ncacn_conn);
1130                 close(s);
1131                 return;
1132         }
1133
1134         /*
1135          * As soon as we have tstream_bsd_existing_socket set up it will
1136          * take care of closing the socket.
1137          */
1138         rc = tstream_bsd_existing_socket(ncacn_conn, s, &ncacn_conn->tstream);
1139         if (rc < 0) {
1140                 DEBUG(2, ("Failed to create tstream socket for dcerpc\n"));
1141                 talloc_free(ncacn_conn);
1142                 close(s);
1143                 return;
1144         }
1145
1146         if (tsocket_address_is_inet(ncacn_conn->client, "ip")) {
1147                 cli_str = ncacn_conn->client_name;
1148         } else {
1149                 cli_str = "";
1150         }
1151
1152         if (ncacn_conn->server != NULL) {
1153                 if (tsocket_address_is_inet(ncacn_conn->server, "ip")) {
1154                         srv_str = ncacn_conn->server_name;
1155                 } else {
1156                         srv_str = NULL;
1157                 }
1158         }
1159
1160         if (ncacn_conn->session_info == NULL) {
1161                 status = auth_anonymous_session_info(ncacn_conn,
1162                                                      &ncacn_conn->session_info);
1163                 if (!NT_STATUS_IS_OK(status)) {
1164                         DEBUG(2, ("Failed to create "
1165                                   "auth_anonymous_session_info - %s\n",
1166                                   nt_errstr(status)));
1167                         talloc_free(ncacn_conn);
1168                         return;
1169                 }
1170         }
1171
1172         rc = make_server_pipes_struct(ncacn_conn,
1173                                       pipe_name,
1174                                       ncacn_conn->syntax_id,
1175                                       ncacn_conn->transport,
1176                                       system_user,
1177                                       cli_str,
1178                                       srv_str,
1179                                       ncacn_conn->session_info,
1180                                       &ncacn_conn->p,
1181                                       &sys_errno);
1182         if (rc < 0) {
1183                 DEBUG(2, ("Failed to create pipe struct - %s",
1184                           strerror(sys_errno)));
1185                 talloc_free(ncacn_conn);
1186                 return;
1187         }
1188
1189         ncacn_conn->send_queue = tevent_queue_create(ncacn_conn,
1190                                                         "dcerpc send queue");
1191         if (ncacn_conn->send_queue == NULL) {
1192                 DEBUG(0, ("Out of memory!\n"));
1193                 talloc_free(ncacn_conn);
1194                 return;
1195         }
1196
1197         subreq = dcerpc_read_ncacn_packet_send(ncacn_conn,
1198                                                ncacn_conn->ev_ctx,
1199                                                ncacn_conn->tstream);
1200         if (subreq == NULL) {
1201                 DEBUG(2, ("Failed to send ncacn packet\n"));
1202                 talloc_free(ncacn_conn);
1203                 return;
1204         }
1205
1206         tevent_req_set_callback(subreq, dcerpc_ncacn_packet_process, ncacn_conn);
1207
1208         DEBUG(10, ("dcerpc_ncacn_accept done\n"));
1209
1210         return;
1211 }
1212
1213 static void dcerpc_ncacn_packet_process(struct tevent_req *subreq)
1214 {
1215         struct dcerpc_ncacn_conn *ncacn_conn =
1216                 tevent_req_callback_data(subreq, struct dcerpc_ncacn_conn);
1217
1218         struct _output_data *out = &ncacn_conn->p->out_data;
1219         DATA_BLOB recv_buffer = data_blob_null;
1220         struct ncacn_packet *pkt;
1221         ssize_t data_left;
1222         ssize_t data_used;
1223         uint32_t to_send;
1224         char *data;
1225         NTSTATUS status;
1226         bool ok;
1227
1228         status = dcerpc_read_ncacn_packet_recv(subreq, ncacn_conn, &pkt, &recv_buffer);
1229         TALLOC_FREE(subreq);
1230         if (!NT_STATUS_IS_OK(status)) {
1231                 if (ncacn_conn->disconnect_fn != NULL) {
1232                         ok = ncacn_conn->disconnect_fn(ncacn_conn->p);
1233                         if (!ok) {
1234                                 DEBUG(3, ("Failed to call disconnect function\n"));
1235                         }
1236                 }
1237                 goto fail;
1238         }
1239
1240         data_left = recv_buffer.length;
1241         data = (char *) recv_buffer.data;
1242
1243         while (data_left) {
1244                 data_used = process_incoming_data(ncacn_conn->p, data, data_left);
1245                 if (data_used < 0) {
1246                         DEBUG(3, ("Failed to process dcerpc request!\n"));
1247                         status = NT_STATUS_UNEXPECTED_IO_ERROR;
1248                         goto fail;
1249                 }
1250
1251                 data_left -= data_used;
1252                 data += data_used;
1253         }
1254
1255         /* Do not leak this buffer */
1256         talloc_free(recv_buffer.data);
1257         talloc_free(pkt);
1258
1259         /*
1260          * This is needed because of the way DCERPC binds work in the RPC
1261          * marshalling code
1262          */
1263         to_send = out->frag.length - out->current_pdu_sent;
1264         if (to_send > 0) {
1265
1266                 DEBUG(10, ("Current_pdu_len = %u, "
1267                            "current_pdu_sent = %u "
1268                            "Returning %u bytes\n",
1269                            (unsigned int)out->frag.length,
1270                            (unsigned int)out->current_pdu_sent,
1271                            (unsigned int)to_send));
1272
1273                 ncacn_conn->iov = talloc_zero(ncacn_conn, struct iovec);
1274                 if (ncacn_conn->iov == NULL) {
1275                         status = NT_STATUS_NO_MEMORY;
1276                         DEBUG(3, ("Out of memory!\n"));
1277                         goto fail;
1278                 }
1279                 ncacn_conn->count = 1;
1280
1281                 ncacn_conn->iov[0].iov_base = out->frag.data
1282                                             + out->current_pdu_sent;
1283                 ncacn_conn->iov[0].iov_len = to_send;
1284
1285                 out->current_pdu_sent += to_send;
1286         }
1287
1288         /*
1289          * This condition is false for bind packets, or when we haven't yet got
1290          * a full request, and need to wait for more data from the client
1291          */
1292         while (out->data_sent_length < out->rdata.length) {
1293                 ok = create_next_pdu(ncacn_conn->p);
1294                 if (!ok) {
1295                         DEBUG(3, ("Failed to create next PDU!\n"));
1296                         status = NT_STATUS_UNEXPECTED_IO_ERROR;
1297                         goto fail;
1298                 }
1299
1300                 ncacn_conn->iov = talloc_realloc(ncacn_conn,
1301                                                  ncacn_conn->iov,
1302                                                  struct iovec,
1303                                                  ncacn_conn->count + 1);
1304                 if (ncacn_conn->iov == NULL) {
1305                         DEBUG(3, ("Out of memory!\n"));
1306                         status = NT_STATUS_NO_MEMORY;
1307                         goto fail;
1308                 }
1309
1310                 ncacn_conn->iov[ncacn_conn->count].iov_base = out->frag.data;
1311                 ncacn_conn->iov[ncacn_conn->count].iov_len = out->frag.length;
1312
1313                 DEBUG(10, ("PDU number: %d, PDU Length: %u\n",
1314                            (unsigned int) ncacn_conn->count,
1315                            (unsigned int) ncacn_conn->iov[ncacn_conn->count].iov_len));
1316                 dump_data(11, (const uint8_t *) ncacn_conn->iov[ncacn_conn->count].iov_base,
1317                               ncacn_conn->iov[ncacn_conn->count].iov_len);
1318                 ncacn_conn->count++;
1319         }
1320
1321         /*
1322          * We still don't have a complete request, go back and wait for more
1323          * data.
1324          */
1325         if (ncacn_conn->count == 0) {
1326                 /* Wait for the next packet */
1327                 subreq = dcerpc_read_ncacn_packet_send(ncacn_conn,
1328                                                        ncacn_conn->ev_ctx,
1329                                                        ncacn_conn->tstream);
1330                 if (subreq == NULL) {
1331                         DEBUG(2, ("Failed to start receving packets\n"));
1332                         status = NT_STATUS_NO_MEMORY;
1333                         goto fail;
1334                 }
1335                 tevent_req_set_callback(subreq, dcerpc_ncacn_packet_process, ncacn_conn);
1336                 return;
1337         }
1338
1339         DEBUG(10, ("Sending a total of %u bytes\n",
1340                    (unsigned int)ncacn_conn->p->out_data.data_sent_length));
1341
1342         subreq = tstream_writev_queue_send(ncacn_conn,
1343                                            ncacn_conn->ev_ctx,
1344                                            ncacn_conn->tstream,
1345                                            ncacn_conn->send_queue,
1346                                            ncacn_conn->iov,
1347                                            ncacn_conn->count);
1348         if (subreq == NULL) {
1349                 DEBUG(2, ("Failed to send packet\n"));
1350                 status = NT_STATUS_NO_MEMORY;
1351                 goto fail;
1352         }
1353
1354         tevent_req_set_callback(subreq, dcerpc_ncacn_packet_done, ncacn_conn);
1355         return;
1356
1357 fail:
1358         DEBUG(3, ("Terminating client(%s) connection! - '%s'\n",
1359                   ncacn_conn->client_name, nt_errstr(status)));
1360
1361         /* Terminate client connection */
1362         talloc_free(ncacn_conn);
1363         return;
1364 }
1365
1366 static void dcerpc_ncacn_packet_done(struct tevent_req *subreq)
1367 {
1368         struct dcerpc_ncacn_conn *ncacn_conn =
1369                 tevent_req_callback_data(subreq, struct dcerpc_ncacn_conn);
1370         NTSTATUS status = NT_STATUS_OK;
1371         int sys_errno;
1372         int rc;
1373
1374         rc = tstream_writev_queue_recv(subreq, &sys_errno);
1375         TALLOC_FREE(subreq);
1376         if (rc < 0) {
1377                 DEBUG(2, ("Writev failed!\n"));
1378                 status = map_nt_error_from_unix(sys_errno);
1379                 goto fail;
1380         }
1381
1382         /* clear out any data that may have been left around */
1383         ncacn_conn->count = 0;
1384         TALLOC_FREE(ncacn_conn->iov);
1385         data_blob_free(&ncacn_conn->p->in_data.data);
1386         data_blob_free(&ncacn_conn->p->out_data.frag);
1387         data_blob_free(&ncacn_conn->p->out_data.rdata);
1388
1389         /* Wait for the next packet */
1390         subreq = dcerpc_read_ncacn_packet_send(ncacn_conn,
1391                                                ncacn_conn->ev_ctx,
1392                                                ncacn_conn->tstream);
1393         if (subreq == NULL) {
1394                 DEBUG(2, ("Failed to start receving packets\n"));
1395                 status = NT_STATUS_NO_MEMORY;
1396                 goto fail;
1397         }
1398
1399         tevent_req_set_callback(subreq, dcerpc_ncacn_packet_process, ncacn_conn);
1400         return;
1401
1402 fail:
1403         DEBUG(3, ("Terminating client(%s) connection! - '%s'\n",
1404                   ncacn_conn->client_name, nt_errstr(status)));
1405
1406         /* Terminate client connection */
1407         talloc_free(ncacn_conn);
1408         return;
1409 }
1410
1411 /* vim: set ts=8 sw=8 noet cindent syntax=c.doxygen: */