libcli/cldap/cldap.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    cldap client library
   5
   6    Copyright (C) Andrew Tridgell 2005
   7    Copyright (C) Stefan Metzmacher 2009
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 /*
  24   see RFC1798 for details of CLDAP
  25
  26   basic properties
  27     - carried over UDP on port 389
  28     - request and response matched by message ID
  29     - request consists of only a single searchRequest element
  30     - response can be in one of two forms
  31        - a single searchResponse, followed by a searchResult
  32        - a single searchResult
  33 */
  34
  35 #include "includes.h"
  36 #include <tevent.h>
  37 #include "../lib/util/dlinklist.h"
  38 #include "../libcli/ldap/ldap_message.h"
  39 #include "../libcli/ldap/ldap_ndr.h"
  40 #include "../libcli/cldap/cldap.h"
  41 #include "../lib/tsocket/tsocket.h"
  42 #include "../libcli/security/dom_sid.h"
  43 #include "../librpc/gen_ndr/ndr_nbt.h"
  44 #include "../lib/util/asn1.h"
  45 #include "../lib/util/tevent_ntstatus.h"
  46
  47 #undef strcasecmp
  48
  49 /*
  50   context structure for operations on cldap packets
  51 */
  52 struct cldap_socket {
  53         /* the low level socket */
  54         struct tdgram_context *sock;
  55
  56         /*
  57          * Are we in connected mode, which means
  58          * we get ICMP errors back instead of timing
  59          * out requests. And we can only send requests
  60          * to the connected peer.
  61          */
  62         bool connected;
  63
  64         /*
  65          * we allow sync requests only, if the caller
  66          * did not pass an event context to cldap_socket_init()
  67          */
  68         struct {
  69                 bool allow_poll;
  70                 struct tevent_context *ctx;
  71         } event;
  72
  73         /* the queue for outgoing dgrams */
  74         struct tevent_queue *send_queue;
  75
  76         /* do we have an async tsocket_recvfrom request pending */
  77         struct tevent_req *recv_subreq;
  78
  79         struct {
  80                 /* a queue of pending search requests */
  81                 struct cldap_search_state *list;
  82
  83                 /* mapping from message_id to pending request */
  84                 struct idr_context *idr;
  85         } searches;
  86
  87         /* what to do with incoming request packets */
  88         struct {
  89                 void (*handler)(struct cldap_socket *,
  90                                 void *private_data,
  91                                 struct cldap_incoming *);
  92                 void *private_data;
  93         } incoming;
  94 };
  95
  96 struct cldap_search_state {
  97         struct cldap_search_state *prev, *next;
  98
  99         struct {
 100                 struct cldap_socket *cldap;
 101         } caller;
 102
 103         int message_id;
 104
 105         struct {
 106                 uint32_t idx;
 107                 uint32_t delay;
 108                 uint32_t count;
 109                 struct tsocket_address *dest;
 110                 DATA_BLOB blob;
 111         } request;
 112
 113         struct {
 114                 struct cldap_incoming *in;
 115                 struct asn1_data *asn1;
 116         } response;
 117
 118         struct tevent_req *req;
 119 };
 120
 121 static int cldap_socket_destructor(struct cldap_socket *c)
 122 {
 123         while (c->searches.list) {
 124                 struct cldap_search_state *s = c->searches.list;
 125                 DLIST_REMOVE(c->searches.list, s);
 126                 ZERO_STRUCT(s->caller);
 127         }
 128
 129         talloc_free(c->recv_subreq);
 130         talloc_free(c->send_queue);
 131         talloc_free(c->sock);
 132         return 0;
 133 }
 134
 135 static void cldap_recvfrom_done(struct tevent_req *subreq);
 136
 137 static bool cldap_recvfrom_setup(struct cldap_socket *c)
 138 {
 139         if (c->recv_subreq) {
 140                 return true;
 141         }
 142
 143         if (!c->searches.list && !c->incoming.handler) {
 144                 return true;
 145         }
 146
 147         c->recv_subreq = tdgram_recvfrom_send(c, c->event.ctx, c->sock);
 148         if (!c->recv_subreq) {
 149                 return false;
 150         }
 151         tevent_req_set_callback(c->recv_subreq, cldap_recvfrom_done, c);
 152
 153         return true;
 154 }
 155
 156 static void cldap_recvfrom_stop(struct cldap_socket *c)
 157 {
 158         if (!c->recv_subreq) {
 159                 return;
 160         }
 161
 162         if (c->searches.list || c->incoming.handler) {
 163                 return;
 164         }
 165
 166         talloc_free(c->recv_subreq);
 167         c->recv_subreq = NULL;
 168 }
 169
 170 static bool cldap_socket_recv_dgram(struct cldap_socket *c,
 171                                     struct cldap_incoming *in);
 172
 173 static void cldap_recvfrom_done(struct tevent_req *subreq)
 174 {
 175         struct cldap_socket *c = tevent_req_callback_data(subreq,
 176                                  struct cldap_socket);
 177         struct cldap_incoming *in = NULL;
 178         ssize_t ret;
 179         bool setup_done;
 180
 181         c->recv_subreq = NULL;
 182
 183         in = talloc_zero(c, struct cldap_incoming);
 184         if (!in) {
 185                 goto nomem;
 186         }
 187
 188         ret = tdgram_recvfrom_recv(subreq,
 189                                    &in->recv_errno,
 190                                    in,
 191                                    &in->buf,
 192                                    &in->src);
 193         talloc_free(subreq);
 194         subreq = NULL;
 195         if (ret >= 0) {
 196                 in->len = ret;
 197         }
 198         if (ret == -1 && in->recv_errno == 0) {
 199                 in->recv_errno = EIO;
 200         }
 201
 202         /* this function should free or steal 'in' */
 203         setup_done = cldap_socket_recv_dgram(c, in);
 204         in = NULL;
 205
 206         if (!setup_done && !cldap_recvfrom_setup(c)) {
 207                 goto nomem;
 208         }
 209
 210         return;
 211
 212 nomem:
 213         talloc_free(subreq);
 214         talloc_free(in);
 215         /*TODO: call a dead socket handler */
 216         return;
 217 }
 218
 219 /*
 220   handle recv events on a cldap socket
 221 */
 222 static bool cldap_socket_recv_dgram(struct cldap_socket *c,
 223                                     struct cldap_incoming *in)
 224 {
 225         DATA_BLOB blob;
 226         struct asn1_data *asn1;
 227         void *p;
 228         struct cldap_search_state *search;
 229         NTSTATUS status;
 230
 231         if (in->recv_errno != 0) {
 232                 goto error;
 233         }
 234
 235         blob = data_blob_const(in->buf, in->len);
 236
 237         asn1 = asn1_init(in);
 238         if (!asn1) {
 239                 goto nomem;
 240         }
 241
 242         if (!asn1_load(asn1, blob)) {
 243                 goto nomem;
 244         }
 245
 246         in->ldap_msg = talloc(in, struct ldap_message);
 247         if (in->ldap_msg == NULL) {
 248                 goto nomem;
 249         }
 250
 251         /* this initial decode is used to find the message id */
 252         status = ldap_decode(asn1, NULL, in->ldap_msg);
 253         if (!NT_STATUS_IS_OK(status)) {
 254                 goto nterror;
 255         }
 256
 257         /* find the pending request */
 258         p = idr_find(c->searches.idr, in->ldap_msg->messageid);
 259         if (p == NULL) {
 260                 if (!c->incoming.handler) {
 261                         goto done;
 262                 }
 263
 264                 /* this function should free or steal 'in' */
 265                 c->incoming.handler(c, c->incoming.private_data, in);
 266                 return false;
 267         }
 268
 269         search = talloc_get_type(p, struct cldap_search_state);
 270         search->response.in = talloc_move(search, &in);
 271         search->response.asn1 = asn1;
 272         search->response.asn1->ofs = 0;
 273
 274         DLIST_REMOVE(c->searches.list, search);
 275
 276         if (!cldap_recvfrom_setup(c)) {
 277                 goto nomem;
 278         }
 279
 280         tevent_req_done(search->req);
 281         talloc_free(in);
 282         return true;
 283
 284 nomem:
 285         in->recv_errno = ENOMEM;
 286 error:
 287         status = map_nt_error_from_unix(in->recv_errno);
 288 nterror:
 289         /* in connected mode the first pending search gets the error */
 290         if (!c->connected) {
 291                 /* otherwise we just ignore the error */
 292                 goto done;
 293         }
 294         if (!c->searches.list) {
 295                 goto done;
 296         }
 297         tevent_req_nterror(c->searches.list->req, status);
 298 done:
 299         talloc_free(in);
 300         return false;
 301 }
 302
 303 /*
 304   initialise a cldap_sock
 305 */
 306 NTSTATUS cldap_socket_init(TALLOC_CTX *mem_ctx,
 307                            struct tevent_context *ev,
 308                            const struct tsocket_address *local_addr,
 309                            const struct tsocket_address *remote_addr,
 310                            struct cldap_socket **_cldap)
 311 {
 312         struct cldap_socket *c = NULL;
 313         struct tsocket_address *any = NULL;
 314         NTSTATUS status;
 315         int ret;
 316
 317         c = talloc_zero(mem_ctx, struct cldap_socket);
 318         if (!c) {
 319                 goto nomem;
 320         }
 321
 322         if (!ev) {
 323                 ev = tevent_context_init(c);
 324                 if (!ev) {
 325                         goto nomem;
 326                 }
 327                 c->event.allow_poll = true;
 328         }
 329         c->event.ctx = ev;
 330
 331         if (!local_addr) {
 332                 /* we use ipv4 here instead of ip, as otherwise we end
 333                    up with a PF_INET6 socket, and sendto() for ipv4
 334                    addresses will fail. That breaks cldap name
 335                    resolution for winbind to IPv4 hosts. */
 336                 ret = tsocket_address_inet_from_strings(c, "ipv4",
 337                                                         NULL, 0,
 338                                                         &any);
 339                 if (ret != 0) {
 340                         status = map_nt_error_from_unix(errno);
 341                         goto nterror;
 342                 }
 343                 local_addr = any;
 344         }
 345
 346         c->searches.idr = idr_init(c);
 347         if (!c->searches.idr) {
 348                 goto nomem;
 349         }
 350
 351         ret = tdgram_inet_udp_socket(local_addr, remote_addr,
 352                                      c, &c->sock);
 353         if (ret != 0) {
 354                 status = map_nt_error_from_unix(errno);
 355                 goto nterror;
 356         }
 357         talloc_free(any);
 358
 359         if (remote_addr) {
 360                 c->connected = true;
 361         }
 362
 363         c->send_queue = tevent_queue_create(c, "cldap_send_queue");
 364         if (!c->send_queue) {
 365                 goto nomem;
 366         }
 367
 368         talloc_set_destructor(c, cldap_socket_destructor);
 369
 370         *_cldap = c;
 371         return NT_STATUS_OK;
 372
 373 nomem:
 374         status = NT_STATUS_NO_MEMORY;
 375 nterror:
 376         talloc_free(c);
 377         return status;
 378 }
 379
 380 /*
 381   setup a handler for incoming requests
 382 */
 383 NTSTATUS cldap_set_incoming_handler(struct cldap_socket *c,
 384                                     void (*handler)(struct cldap_socket *,
 385                                                     void *private_data,
 386                                                     struct cldap_incoming *),
 387                                     void *private_data)
 388 {
 389         if (c->connected) {
 390                 return NT_STATUS_PIPE_CONNECTED;
 391         }
 392
 393         /* if sync requests are allowed, we don't allow an incoming handler */
 394         if (c->event.allow_poll) {
 395                 return NT_STATUS_INVALID_PIPE_STATE;
 396         }
 397
 398         c->incoming.handler = handler;
 399         c->incoming.private_data = private_data;
 400
 401         if (!cldap_recvfrom_setup(c)) {
 402                 ZERO_STRUCT(c->incoming);
 403                 return NT_STATUS_NO_MEMORY;
 404         }
 405
 406         return NT_STATUS_OK;
 407 }
 408
 409 struct cldap_reply_state {
 410         struct tsocket_address *dest;
 411         DATA_BLOB blob;
 412 };
 413
 414 static void cldap_reply_state_destroy(struct tevent_req *subreq);
 415
 416 /*
 417   queue a cldap reply for send
 418 */
 419 NTSTATUS cldap_reply_send(struct cldap_socket *cldap, struct cldap_reply *io)
 420 {
 421         struct cldap_reply_state *state = NULL;
 422         struct ldap_message *msg;
 423         DATA_BLOB blob1, blob2;
 424         NTSTATUS status;
 425         struct tevent_req *subreq;
 426
 427         if (cldap->connected) {
 428                 return NT_STATUS_PIPE_CONNECTED;
 429         }
 430
 431         if (!io->dest) {
 432                 return NT_STATUS_INVALID_ADDRESS;
 433         }
 434
 435         state = talloc(cldap, struct cldap_reply_state);
 436         NT_STATUS_HAVE_NO_MEMORY(state);
 437
 438         state->dest = tsocket_address_copy(io->dest, state);
 439         if (!state->dest) {
 440                 goto nomem;
 441         }
 442
 443         msg = talloc(state, struct ldap_message);
 444         if (!msg) {
 445                 goto nomem;
 446         }
 447
 448         msg->messageid       = io->messageid;
 449         msg->controls        = NULL;
 450
 451         if (io->response) {
 452                 msg->type = LDAP_TAG_SearchResultEntry;
 453                 msg->r.SearchResultEntry = *io->response;
 454
 455                 if (!ldap_encode(msg, NULL, &blob1, state)) {
 456                         status = NT_STATUS_INVALID_PARAMETER;
 457                         goto failed;
 458                 }
 459         } else {
 460                 blob1 = data_blob(NULL, 0);
 461         }
 462
 463         msg->type = LDAP_TAG_SearchResultDone;
 464         msg->r.SearchResultDone = *io->result;
 465
 466         if (!ldap_encode(msg, NULL, &blob2, state)) {
 467                 status = NT_STATUS_INVALID_PARAMETER;
 468                 goto failed;
 469         }
 470         talloc_free(msg);
 471
 472         state->blob = data_blob_talloc(state, NULL, blob1.length + blob2.length);
 473         if (!state->blob.data) {
 474                 goto nomem;
 475         }
 476
 477         memcpy(state->blob.data, blob1.data, blob1.length);
 478         memcpy(state->blob.data+blob1.length, blob2.data, blob2.length);
 479         data_blob_free(&blob1);
 480         data_blob_free(&blob2);
 481
 482         subreq = tdgram_sendto_queue_send(state,
 483                                           cldap->event.ctx,
 484                                           cldap->sock,
 485                                           cldap->send_queue,
 486                                           state->blob.data,
 487                                           state->blob.length,
 488                                           state->dest);
 489         if (!subreq) {
 490                 goto nomem;
 491         }
 492         /* the callback will just free the state, as we don't need a result */
 493         tevent_req_set_callback(subreq, cldap_reply_state_destroy, state);
 494
 495         return NT_STATUS_OK;
 496
 497 nomem:
 498         status = NT_STATUS_NO_MEMORY;
 499 failed:
 500         talloc_free(state);
 501         return status;
 502 }
 503
 504 static void cldap_reply_state_destroy(struct tevent_req *subreq)
 505 {
 506         struct cldap_reply_state *state = tevent_req_callback_data(subreq,
 507                                           struct cldap_reply_state);
 508
 509         /* we don't want to know the result here, we just free the state */
 510         talloc_free(subreq);
 511         talloc_free(state);
 512 }
 513
 514 static int cldap_search_state_destructor(struct cldap_search_state *s)
 515 {
 516         if (s->caller.cldap) {
 517                 if (s->message_id != -1) {
 518                         idr_remove(s->caller.cldap->searches.idr, s->message_id);
 519                         s->message_id = -1;
 520                 }
 521                 DLIST_REMOVE(s->caller.cldap->searches.list, s);
 522                 cldap_recvfrom_stop(s->caller.cldap);
 523                 ZERO_STRUCT(s->caller);
 524         }
 525
 526         return 0;
 527 }
 528
 529 static void cldap_search_state_queue_done(struct tevent_req *subreq);
 530 static void cldap_search_state_wakeup_done(struct tevent_req *subreq);
 531
 532 /*
 533   queue a cldap reply for send
 534 */
 535 struct tevent_req *cldap_search_send(TALLOC_CTX *mem_ctx,
 536                                     struct cldap_socket *cldap,
 537                                     const struct cldap_search *io)
 538 {
 539         struct tevent_req *req, *subreq;
 540         struct cldap_search_state *state = NULL;
 541         struct ldap_message *msg;
 542         struct ldap_SearchRequest *search;
 543         struct timeval now;
 544         struct timeval end;
 545         uint32_t i;
 546         int ret;
 547
 548         req = tevent_req_create(mem_ctx, &state,
 549                                 struct cldap_search_state);
 550         if (!req) {
 551                 return NULL;
 552         }
 553         ZERO_STRUCTP(state);
 554         state->req = req;
 555         state->caller.cldap = cldap;
 556         state->message_id = -1;
 557
 558         talloc_set_destructor(state, cldap_search_state_destructor);
 559
 560         if (io->in.dest_address) {
 561                 if (cldap->connected) {
 562                         tevent_req_nterror(req, NT_STATUS_PIPE_CONNECTED);
 563                         goto post;
 564                 }
 565                 ret = tsocket_address_inet_from_strings(state,
 566                                                         "ip",
 567                                                         io->in.dest_address,
 568                                                         io->in.dest_port,
 569                                                         &state->request.dest);
 570                 if (ret != 0) {
 571                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 572                         goto post;
 573                 }
 574         } else {
 575                 if (!cldap->connected) {
 576                         tevent_req_nterror(req, NT_STATUS_INVALID_ADDRESS);
 577                         goto post;
 578                 }
 579                 state->request.dest = NULL;
 580         }
 581
 582         state->message_id = idr_get_new_random(cldap->searches.idr,
 583                                                state, UINT16_MAX);
 584         if (state->message_id == -1) {
 585                 tevent_req_nterror(req, NT_STATUS_INSUFFICIENT_RESOURCES);
 586                 goto post;
 587         }
 588
 589         msg = talloc(state, struct ldap_message);
 590         if (tevent_req_nomem(msg, req)) {
 591                 goto post;
 592         }
 593
 594         msg->messageid  = state->message_id;
 595         msg->type       = LDAP_TAG_SearchRequest;
 596         msg->controls   = NULL;
 597         search = &msg->r.SearchRequest;
 598
 599         search->basedn          = "";
 600         search->scope           = LDAP_SEARCH_SCOPE_BASE;
 601         search->deref           = LDAP_DEREFERENCE_NEVER;
 602         search->timelimit       = 0;
 603         search->sizelimit       = 0;
 604         search->attributesonly  = false;
 605         search->num_attributes  = str_list_length(io->in.attributes);
 606         search->attributes      = io->in.attributes;
 607         search->tree            = ldb_parse_tree(msg, io->in.filter);
 608         if (tevent_req_nomem(search->tree, req)) {
 609                 goto post;
 610         }
 611
 612         if (!ldap_encode(msg, NULL, &state->request.blob, state)) {
 613                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 614                 goto post;
 615         }
 616         talloc_free(msg);
 617
 618         state->request.idx = 0;
 619         state->request.delay = 10*1000*1000;
 620         state->request.count = 3;
 621         if (io->in.timeout > 0) {
 622                 state->request.delay = io->in.timeout * 1000 * 1000;
 623                 state->request.count = io->in.retries + 1;
 624         }
 625
 626         now = tevent_timeval_current();
 627         end = now;
 628         for (i = 0; i < state->request.count; i++) {
 629                 end = tevent_timeval_add(&end, 0, state->request.delay);
 630         }
 631
 632         if (!tevent_req_set_endtime(req, state->caller.cldap->event.ctx, end)) {
 633                 tevent_req_nomem(NULL, req);
 634                 goto post;
 635         }
 636
 637         subreq = tdgram_sendto_queue_send(state,
 638                                           state->caller.cldap->event.ctx,
 639                                           state->caller.cldap->sock,
 640                                           state->caller.cldap->send_queue,
 641                                           state->request.blob.data,
 642                                           state->request.blob.length,
 643                                           state->request.dest);
 644         if (tevent_req_nomem(subreq, req)) {
 645                 goto post;
 646         }
 647         tevent_req_set_callback(subreq, cldap_search_state_queue_done, req);
 648
 649         DLIST_ADD_END(cldap->searches.list, state, struct cldap_search_state *);
 650
 651         return req;
 652
 653  post:
 654         return tevent_req_post(req, cldap->event.ctx);
 655 }
 656
 657 static void cldap_search_state_queue_done(struct tevent_req *subreq)
 658 {
 659         struct tevent_req *req = tevent_req_callback_data(subreq,
 660                                  struct tevent_req);
 661         struct cldap_search_state *state = tevent_req_data(req,
 662                                            struct cldap_search_state);
 663         ssize_t ret;
 664         int sys_errno = 0;
 665         struct timeval next;
 666
 667         ret = tdgram_sendto_queue_recv(subreq, &sys_errno);
 668         talloc_free(subreq);
 669         if (ret == -1) {
 670                 NTSTATUS status;
 671                 status = map_nt_error_from_unix(sys_errno);
 672                 DLIST_REMOVE(state->caller.cldap->searches.list, state);
 673                 ZERO_STRUCT(state->caller.cldap);
 674                 tevent_req_nterror(req, status);
 675                 return;
 676         }
 677
 678         state->request.idx++;
 679
 680         /* wait for incoming traffic */
 681         if (!cldap_recvfrom_setup(state->caller.cldap)) {
 682                 tevent_req_nomem(NULL, req);
 683                 return;
 684         }
 685
 686         if (state->request.idx > state->request.count) {
 687                 /* we just wait for the response or a timeout */
 688                 return;
 689         }
 690
 691         next = tevent_timeval_current_ofs(0, state->request.delay);
 692         subreq = tevent_wakeup_send(state,
 693                                     state->caller.cldap->event.ctx,
 694                                     next);
 695         if (tevent_req_nomem(subreq, req)) {
 696                 return;
 697         }
 698         tevent_req_set_callback(subreq, cldap_search_state_wakeup_done, req);
 699 }
 700
 701 static void cldap_search_state_wakeup_done(struct tevent_req *subreq)
 702 {
 703         struct tevent_req *req = tevent_req_callback_data(subreq,
 704                                  struct tevent_req);
 705         struct cldap_search_state *state = tevent_req_data(req,
 706                                            struct cldap_search_state);
 707         bool ok;
 708
 709         ok = tevent_wakeup_recv(subreq);
 710         talloc_free(subreq);
 711         if (!ok) {
 712                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 713                 return;
 714         }
 715
 716         subreq = tdgram_sendto_queue_send(state,
 717                                           state->caller.cldap->event.ctx,
 718                                           state->caller.cldap->sock,
 719                                           state->caller.cldap->send_queue,
 720                                           state->request.blob.data,
 721                                           state->request.blob.length,
 722                                           state->request.dest);
 723         if (tevent_req_nomem(subreq, req)) {
 724                 return;
 725         }
 726         tevent_req_set_callback(subreq, cldap_search_state_queue_done, req);
 727 }
 728
 729 /*
 730   receive a cldap reply
 731 */
 732 NTSTATUS cldap_search_recv(struct tevent_req *req,
 733                            TALLOC_CTX *mem_ctx,
 734                            struct cldap_search *io)
 735 {
 736         struct cldap_search_state *state = tevent_req_data(req,
 737                                            struct cldap_search_state);
 738         struct ldap_message *ldap_msg;
 739         NTSTATUS status;
 740
 741         if (tevent_req_is_nterror(req, &status)) {
 742                 goto failed;
 743         }
 744
 745         ldap_msg = talloc(mem_ctx, struct ldap_message);
 746         if (!ldap_msg) {
 747                 goto nomem;
 748         }
 749
 750         status = ldap_decode(state->response.asn1, NULL, ldap_msg);
 751         if (!NT_STATUS_IS_OK(status)) {
 752                 goto failed;
 753         }
 754
 755         ZERO_STRUCT(io->out);
 756
 757         /* the first possible form has a search result in first place */
 758         if (ldap_msg->type == LDAP_TAG_SearchResultEntry) {
 759                 io->out.response = talloc(mem_ctx, struct ldap_SearchResEntry);
 760                 if (!io->out.response) {
 761                         goto nomem;
 762                 }
 763                 *io->out.response = ldap_msg->r.SearchResultEntry;
 764
 765                 /* decode the 2nd part */
 766                 status = ldap_decode(state->response.asn1, NULL, ldap_msg);
 767                 if (!NT_STATUS_IS_OK(status)) {
 768                         goto failed;
 769                 }
 770         }
 771
 772         if (ldap_msg->type != LDAP_TAG_SearchResultDone) {
 773                 status = NT_STATUS_LDAP(LDAP_PROTOCOL_ERROR);
 774                 goto failed;
 775         }
 776
 777         io->out.result = talloc(mem_ctx, struct ldap_Result);
 778         if (!io->out.result) {
 779                 goto nomem;
 780         }
 781         *io->out.result = ldap_msg->r.SearchResultDone;
 782
 783         if (io->out.result->resultcode != LDAP_SUCCESS) {
 784                 status = NT_STATUS_LDAP(io->out.result->resultcode);
 785                 goto failed;
 786         }
 787
 788         tevent_req_received(req);
 789         return NT_STATUS_OK;
 790
 791 nomem:
 792         status = NT_STATUS_NO_MEMORY;
 793 failed:
 794         tevent_req_received(req);
 795         return status;
 796 }
 797
 798
 799 /*
 800   synchronous cldap search
 801 */
 802 NTSTATUS cldap_search(struct cldap_socket *cldap,
 803                       TALLOC_CTX *mem_ctx,
 804                       struct cldap_search *io)
 805 {
 806         struct tevent_req *req;
 807         NTSTATUS status;
 808
 809         if (!cldap->event.allow_poll) {
 810                 return NT_STATUS_INVALID_PIPE_STATE;
 811         }
 812
 813         if (cldap->searches.list) {
 814                 return NT_STATUS_PIPE_BUSY;
 815         }
 816
 817         req = cldap_search_send(mem_ctx, cldap, io);
 818         NT_STATUS_HAVE_NO_MEMORY(req);
 819
 820         if (!tevent_req_poll(req, cldap->event.ctx)) {
 821                 talloc_free(req);
 822                 return NT_STATUS_INTERNAL_ERROR;
 823         }
 824
 825         status = cldap_search_recv(req, mem_ctx, io);
 826         talloc_free(req);
 827
 828         return status;
 829 }
 830
 831 struct cldap_netlogon_state {
 832         struct cldap_search search;
 833 };
 834
 835 static void cldap_netlogon_state_done(struct tevent_req *subreq);
 836 /*
 837   queue a cldap netlogon for send
 838 */
 839 struct tevent_req *cldap_netlogon_send(TALLOC_CTX *mem_ctx,
 840                                       struct cldap_socket *cldap,
 841                                       const struct cldap_netlogon *io)
 842 {
 843         struct tevent_req *req, *subreq;
 844         struct cldap_netlogon_state *state;
 845         char *filter;
 846         static const char * const attr[] = { "NetLogon", NULL };
 847
 848         req = tevent_req_create(mem_ctx, &state,
 849                                 struct cldap_netlogon_state);
 850         if (!req) {
 851                 return NULL;
 852         }
 853
 854         filter = talloc_asprintf(state, "(&(NtVer=%s)",
 855                                  ldap_encode_ndr_uint32(state, io->in.version));
 856         if (tevent_req_nomem(filter, req)) {
 857                 goto post;
 858         }
 859         if (io->in.user) {
 860                 filter = talloc_asprintf_append_buffer(filter, "(User=%s)", io->in.user);
 861                 if (tevent_req_nomem(filter, req)) {
 862                         goto post;
 863                 }
 864         }
 865         if (io->in.host) {
 866                 filter = talloc_asprintf_append_buffer(filter, "(Host=%s)", io->in.host);
 867                 if (tevent_req_nomem(filter, req)) {
 868                         goto post;
 869                 }
 870         }
 871         if (io->in.realm) {
 872                 filter = talloc_asprintf_append_buffer(filter, "(DnsDomain=%s)", io->in.realm);
 873                 if (tevent_req_nomem(filter, req)) {
 874                         goto post;
 875                 }
 876         }
 877         if (io->in.acct_control != -1) {
 878                 filter = talloc_asprintf_append_buffer(filter, "(AAC=%s)",
 879                                                 ldap_encode_ndr_uint32(state, io->in.acct_control));
 880                 if (tevent_req_nomem(filter, req)) {
 881                         goto post;
 882                 }
 883         }
 884         if (io->in.domain_sid) {
 885                 struct dom_sid *sid = dom_sid_parse_talloc(state, io->in.domain_sid);
 886                 if (tevent_req_nomem(sid, req)) {
 887                         goto post;
 888                 }
 889                 filter = talloc_asprintf_append_buffer(filter, "(domainSid=%s)",
 890                                                 ldap_encode_ndr_dom_sid(state, sid));
 891                 if (tevent_req_nomem(filter, req)) {
 892                         goto post;
 893                 }
 894         }
 895         if (io->in.domain_guid) {
 896                 struct GUID guid;
 897                 NTSTATUS status;
 898                 status = GUID_from_string(io->in.domain_guid, &guid);
 899                 if (tevent_req_nterror(req, status)) {
 900                         goto post;
 901                 }
 902                 filter = talloc_asprintf_append_buffer(filter, "(DomainGuid=%s)",
 903                                                 ldap_encode_ndr_GUID(state, &guid));
 904                 if (tevent_req_nomem(filter, req)) {
 905                         goto post;
 906                 }
 907         }
 908         filter = talloc_asprintf_append_buffer(filter, ")");
 909         if (tevent_req_nomem(filter, req)) {
 910                 goto post;
 911         }
 912
 913         if (io->in.dest_address) {
 914                 state->search.in.dest_address = talloc_strdup(state,
 915                                                 io->in.dest_address);
 916                 if (tevent_req_nomem(state->search.in.dest_address, req)) {
 917                         goto post;
 918                 }
 919                 state->search.in.dest_port = io->in.dest_port;
 920         } else {
 921                 state->search.in.dest_address   = NULL;
 922                 state->search.in.dest_port      = 0;
 923         }
 924         state->search.in.filter         = filter;
 925         state->search.in.attributes     = attr;
 926         state->search.in.timeout        = 2;
 927         state->search.in.retries        = 2;
 928
 929         subreq = cldap_search_send(state, cldap, &state->search);
 930         if (tevent_req_nomem(subreq, req)) {
 931                 goto post;
 932         }
 933         tevent_req_set_callback(subreq, cldap_netlogon_state_done, req);
 934
 935         return req;
 936 post:
 937         return tevent_req_post(req, cldap->event.ctx);
 938 }
 939
 940 static void cldap_netlogon_state_done(struct tevent_req *subreq)
 941 {
 942         struct tevent_req *req = tevent_req_callback_data(subreq,
 943                                  struct tevent_req);
 944         struct cldap_netlogon_state *state = tevent_req_data(req,
 945                                              struct cldap_netlogon_state);
 946         NTSTATUS status;
 947
 948         status = cldap_search_recv(subreq, state, &state->search);
 949         talloc_free(subreq);
 950
 951         if (tevent_req_nterror(req, status)) {
 952                 return;
 953         }
 954
 955         tevent_req_done(req);
 956 }
 957
 958 /*
 959   receive a cldap netlogon reply
 960 */
 961 NTSTATUS cldap_netlogon_recv(struct tevent_req *req,
 962                              TALLOC_CTX *mem_ctx,
 963                              struct cldap_netlogon *io)
 964 {
 965         struct cldap_netlogon_state *state = tevent_req_data(req,
 966                                              struct cldap_netlogon_state);
 967         NTSTATUS status;
 968         DATA_BLOB *data;
 969
 970         if (tevent_req_is_nterror(req, &status)) {
 971                 goto failed;
 972         }
 973
 974         if (state->search.out.response == NULL) {
 975                 status = NT_STATUS_NOT_FOUND;
 976                 goto failed;
 977         }
 978
 979         if (state->search.out.response->num_attributes != 1 ||
 980             strcasecmp(state->search.out.response->attributes[0].name, "netlogon") != 0 ||
 981             state->search.out.response->attributes[0].num_values != 1 ||
 982             state->search.out.response->attributes[0].values->length < 2) {
 983                 status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
 984                 goto failed;
 985         }
 986         data = state->search.out.response->attributes[0].values;
 987
 988         status = pull_netlogon_samlogon_response(data, mem_ctx,
 989                                                  &io->out.netlogon);
 990         if (!NT_STATUS_IS_OK(status)) {
 991                 goto failed;
 992         }
 993
 994         if (io->in.map_response) {
 995                 map_netlogon_samlogon_response(&io->out.netlogon);
 996         }
 997
 998         status =  NT_STATUS_OK;
 999 failed:
1000         tevent_req_received(req);
1001         return status;
1002 }
1003
1004 /*
1005   sync cldap netlogon search
1006 */
1007 NTSTATUS cldap_netlogon(struct cldap_socket *cldap,
1008                         TALLOC_CTX *mem_ctx,
1009                         struct cldap_netlogon *io)
1010 {
1011         struct tevent_req *req;
1012         NTSTATUS status;
1013
1014         if (!cldap->event.allow_poll) {
1015                 return NT_STATUS_INVALID_PIPE_STATE;
1016         }
1017
1018         if (cldap->searches.list) {
1019                 return NT_STATUS_PIPE_BUSY;
1020         }
1021
1022         req = cldap_netlogon_send(mem_ctx, cldap, io);
1023         NT_STATUS_HAVE_NO_MEMORY(req);
1024
1025         if (!tevent_req_poll(req, cldap->event.ctx)) {
1026                 talloc_free(req);
1027                 return NT_STATUS_INTERNAL_ERROR;
1028         }
1029
1030         status = cldap_netlogon_recv(req, mem_ctx, io);
1031         talloc_free(req);
1032
1033         return status;
1034 }
1035
1036
1037 /*
1038   send an empty reply (used on any error, so the client doesn't keep waiting
1039   or send the bad request again)
1040 */
1041 NTSTATUS cldap_empty_reply(struct cldap_socket *cldap,
1042                            uint32_t message_id,
1043                            struct tsocket_address *dest)
1044 {
1045         NTSTATUS status;
1046         struct cldap_reply reply;
1047         struct ldap_Result result;
1048
1049         reply.messageid    = message_id;
1050         reply.dest         = dest;
1051         reply.response     = NULL;
1052         reply.result       = &result;
1053
1054         ZERO_STRUCT(result);
1055
1056         status = cldap_reply_send(cldap, &reply);
1057
1058         return status;
1059 }
1060
1061 /*
1062   send an error reply (used on any error, so the client doesn't keep waiting
1063   or send the bad request again)
1064 */
1065 NTSTATUS cldap_error_reply(struct cldap_socket *cldap,
1066                            uint32_t message_id,
1067                            struct tsocket_address *dest,
1068                            int resultcode,
1069                            const char *errormessage)
1070 {
1071         NTSTATUS status;
1072         struct cldap_reply reply;
1073         struct ldap_Result result;
1074
1075         reply.messageid    = message_id;
1076         reply.dest         = dest;
1077         reply.response     = NULL;
1078         reply.result       = &result;
1079
1080         ZERO_STRUCT(result);
1081         result.resultcode       = resultcode;
1082         result.errormessage     = errormessage;
1083
1084         status = cldap_reply_send(cldap, &reply);
1085
1086         return status;
1087 }
1088
1089
1090 /*
1091   send a netlogon reply
1092 */
1093 NTSTATUS cldap_netlogon_reply(struct cldap_socket *cldap,
1094                               uint32_t message_id,
1095                               struct tsocket_address *dest,
1096                               uint32_t version,
1097                               struct netlogon_samlogon_response *netlogon)
1098 {
1099         NTSTATUS status;
1100         struct cldap_reply reply;
1101         struct ldap_SearchResEntry response;
1102         struct ldap_Result result;
1103         TALLOC_CTX *tmp_ctx = talloc_new(cldap);
1104         DATA_BLOB blob;
1105
1106         status = push_netlogon_samlogon_response(&blob, tmp_ctx,
1107                                                  netlogon);
1108         if (!NT_STATUS_IS_OK(status)) {
1109                 talloc_free(tmp_ctx);
1110                 return status;
1111         }
1112         reply.messageid    = message_id;
1113         reply.dest         = dest;
1114         reply.response     = &response;
1115         reply.result       = &result;
1116
1117         ZERO_STRUCT(result);
1118
1119         response.dn = "";
1120         response.num_attributes = 1;
1121         response.attributes = talloc(tmp_ctx, struct ldb_message_element);
1122         NT_STATUS_HAVE_NO_MEMORY(response.attributes);
1123         response.attributes->name = "netlogon";
1124         response.attributes->num_values = 1;
1125         response.attributes->values = &blob;
1126
1127         status = cldap_reply_send(cldap, &reply);
1128
1129         talloc_free(tmp_ctx);
1130
1131         return status;
1132 }
1133