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         /* the queue for outgoing dgrams */
  65         struct tevent_queue *send_queue;
  66
  67         /* do we have an async tsocket_recvfrom request pending */
  68         struct tevent_req *recv_subreq;
  69
  70         struct {
  71                 /* a queue of pending search requests */
  72                 struct cldap_search_state *list;
  73
  74                 /* mapping from message_id to pending request */
  75                 struct idr_context *idr;
  76         } searches;
  77
  78         /* what to do with incoming request packets */
  79         struct {
  80                 struct tevent_context *ev;
  81                 void (*handler)(struct cldap_socket *,
  82                                 void *private_data,
  83                                 struct cldap_incoming *);
  84                 void *private_data;
  85         } incoming;
  86 };
  87
  88 struct cldap_search_state {
  89         struct cldap_search_state *prev, *next;
  90
  91         struct {
  92                 struct tevent_context *ev;
  93                 struct cldap_socket *cldap;
  94         } caller;
  95
  96         int message_id;
  97
  98         struct {
  99                 uint32_t idx;
 100                 uint32_t delay;
 101                 uint32_t count;
 102                 struct tsocket_address *dest;
 103                 DATA_BLOB blob;
 104         } request;
 105
 106         struct {
 107                 struct cldap_incoming *in;
 108                 struct asn1_data *asn1;
 109         } response;
 110
 111         struct tevent_req *req;
 112 };
 113
 114 static int cldap_socket_destructor(struct cldap_socket *c)
 115 {
 116         while (c->searches.list) {
 117                 struct cldap_search_state *s = c->searches.list;
 118                 DLIST_REMOVE(c->searches.list, s);
 119                 ZERO_STRUCT(s->caller);
 120         }
 121
 122         talloc_free(c->recv_subreq);
 123         talloc_free(c->send_queue);
 124         talloc_free(c->sock);
 125         return 0;
 126 }
 127
 128 static void cldap_recvfrom_done(struct tevent_req *subreq);
 129
 130 static bool cldap_recvfrom_setup(struct cldap_socket *c)
 131 {
 132         struct tevent_context *ev;
 133
 134         if (c->recv_subreq) {
 135                 return true;
 136         }
 137
 138         if (!c->searches.list && !c->incoming.handler) {
 139                 return true;
 140         }
 141
 142         ev = c->incoming.ev;
 143         if (ev == NULL) {
 144                 ev = c->searches.list->caller.ev;
 145         }
 146
 147         c->recv_subreq = tdgram_recvfrom_send(c, ev, 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 }
 216
 217 /*
 218   handle recv events on a cldap socket
 219 */
 220 static bool cldap_socket_recv_dgram(struct cldap_socket *c,
 221                                     struct cldap_incoming *in)
 222 {
 223         struct asn1_data *asn1;
 224         void *p;
 225         struct cldap_search_state *search;
 226         NTSTATUS status;
 227
 228         if (in->recv_errno != 0) {
 229                 goto error;
 230         }
 231
 232         asn1 = asn1_init(in);
 233         if (!asn1) {
 234                 goto nomem;
 235         }
 236
 237         asn1_load_nocopy(asn1, in->buf, in->len);
 238
 239         in->ldap_msg = talloc(in, struct ldap_message);
 240         if (in->ldap_msg == NULL) {
 241                 goto nomem;
 242         }
 243
 244         /* this initial decode is used to find the message id */
 245         status = ldap_decode(asn1, NULL, in->ldap_msg);
 246         if (!NT_STATUS_IS_OK(status)) {
 247                 goto nterror;
 248         }
 249
 250         /* find the pending request */
 251         p = idr_find(c->searches.idr, in->ldap_msg->messageid);
 252         if (p == NULL) {
 253                 if (!c->incoming.handler) {
 254                         TALLOC_FREE(in);
 255                         return true;
 256                 }
 257
 258                 /* this function should free or steal 'in' */
 259                 c->incoming.handler(c, c->incoming.private_data, in);
 260                 return false;
 261         }
 262
 263         search = talloc_get_type_abort(p, struct cldap_search_state);
 264         search->response.in = talloc_move(search, &in);
 265
 266         search->response.asn1 = asn1;
 267
 268         asn1_load_nocopy(search->response.asn1,
 269                          search->response.in->buf, search->response.in->len);
 270
 271         DLIST_REMOVE(c->searches.list, search);
 272
 273         if (cldap_recvfrom_setup(c)) {
 274                 tevent_req_done(search->req);
 275                 return true;
 276         }
 277
 278         /*
 279          * This request was ok, just defer the notify of the caller
 280          * and then just fail the next request if needed
 281          */
 282         tevent_req_defer_callback(search->req, search->caller.ev);
 283         tevent_req_done(search->req);
 284
 285         status = NT_STATUS_NO_MEMORY;
 286         /* in is NULL it this point */
 287         goto nterror;
 288 nomem:
 289         in->recv_errno = ENOMEM;
 290 error:
 291         status = map_nt_error_from_unix_common(in->recv_errno);
 292 nterror:
 293         TALLOC_FREE(in);
 294         /* in connected mode the first pending search gets the error */
 295         if (!c->connected) {
 296                 /* otherwise we just ignore the error */
 297                 return false;
 298         }
 299         if (!c->searches.list) {
 300                 return false;
 301         }
 302         /*
 303          * We might called tevent_req_done() for a successful
 304          * search before, so we better deliver the failure
 305          * after the success, that is why we better also
 306          * use tevent_req_defer_callback() here.
 307          */
 308         tevent_req_defer_callback(c->searches.list->req,
 309                                   c->searches.list->caller.ev);
 310         tevent_req_nterror(c->searches.list->req, status);
 311         return false;
 312 }
 313
 314 /*
 315   initialise a cldap_sock
 316 */
 317 NTSTATUS cldap_socket_init(TALLOC_CTX *mem_ctx,
 318                            const struct tsocket_address *local_addr,
 319                            const struct tsocket_address *remote_addr,
 320                            struct cldap_socket **_cldap)
 321 {
 322         struct cldap_socket *c = NULL;
 323         struct tsocket_address *any = NULL;
 324         NTSTATUS status;
 325         int ret;
 326         const char *fam = NULL;
 327
 328         if (local_addr == NULL && remote_addr == NULL) {
 329                 return NT_STATUS_INVALID_PARAMETER_MIX;
 330         }
 331
 332         if (remote_addr) {
 333                 bool is_ipv4;
 334                 bool is_ipv6;
 335
 336                 is_ipv4 = tsocket_address_is_inet(remote_addr, "ipv4");
 337                 is_ipv6 = tsocket_address_is_inet(remote_addr, "ipv6");
 338
 339                 if (is_ipv4) {
 340                         fam = "ipv4";
 341                 } else if (is_ipv6) {
 342                         fam = "ipv6";
 343                 } else {
 344                         return NT_STATUS_INVALID_ADDRESS;
 345                 }
 346         }
 347
 348         c = talloc_zero(mem_ctx, struct cldap_socket);
 349         if (!c) {
 350                 goto nomem;
 351         }
 352
 353         if (!local_addr) {
 354                 /*
 355                  * Here we know the address family of the remote address.
 356                  */
 357                 if (fam == NULL) {
 358                         return NT_STATUS_INVALID_PARAMETER_MIX;
 359                 }
 360
 361                 ret = tsocket_address_inet_from_strings(c, fam,
 362                                                         NULL, 0,
 363                                                         &any);
 364                 if (ret != 0) {
 365                         status = map_nt_error_from_unix_common(errno);
 366                         goto nterror;
 367                 }
 368                 local_addr = any;
 369         }
 370
 371         c->searches.idr = idr_init(c);
 372         if (!c->searches.idr) {
 373                 goto nomem;
 374         }
 375
 376         ret = tdgram_inet_udp_socket(local_addr, remote_addr,
 377                                      c, &c->sock);
 378         if (ret != 0) {
 379                 status = map_nt_error_from_unix_common(errno);
 380                 goto nterror;
 381         }
 382         talloc_free(any);
 383
 384         if (remote_addr) {
 385                 c->connected = true;
 386         }
 387
 388         c->send_queue = tevent_queue_create(c, "cldap_send_queue");
 389         if (!c->send_queue) {
 390                 goto nomem;
 391         }
 392
 393         talloc_set_destructor(c, cldap_socket_destructor);
 394
 395         *_cldap = c;
 396         return NT_STATUS_OK;
 397
 398 nomem:
 399         status = NT_STATUS_NO_MEMORY;
 400 nterror:
 401         talloc_free(c);
 402         return status;
 403 }
 404
 405 /*
 406   setup a handler for incoming requests
 407 */
 408 NTSTATUS cldap_set_incoming_handler(struct cldap_socket *c,
 409                                     struct tevent_context *ev,
 410                                     void (*handler)(struct cldap_socket *,
 411                                                     void *private_data,
 412                                                     struct cldap_incoming *),
 413                                     void *private_data)
 414 {
 415         if (c->connected) {
 416                 return NT_STATUS_PIPE_CONNECTED;
 417         }
 418
 419         c->incoming.ev = ev;
 420         c->incoming.handler = handler;
 421         c->incoming.private_data = private_data;
 422
 423         if (!cldap_recvfrom_setup(c)) {
 424                 ZERO_STRUCT(c->incoming);
 425                 return NT_STATUS_NO_MEMORY;
 426         }
 427
 428         return NT_STATUS_OK;
 429 }
 430
 431 struct cldap_reply_state {
 432         struct tsocket_address *dest;
 433         DATA_BLOB blob;
 434 };
 435
 436 static void cldap_reply_state_destroy(struct tevent_req *subreq);
 437
 438 /*
 439   queue a cldap reply for send
 440 */
 441 NTSTATUS cldap_reply_send(struct cldap_socket *cldap, struct cldap_reply *io)
 442 {
 443         struct cldap_reply_state *state = NULL;
 444         struct ldap_message *msg;
 445         DATA_BLOB blob1, blob2;
 446         NTSTATUS status;
 447         struct tevent_req *subreq;
 448
 449         if (cldap->connected) {
 450                 return NT_STATUS_PIPE_CONNECTED;
 451         }
 452
 453         if (cldap->incoming.ev == NULL) {
 454                 return NT_STATUS_INVALID_PIPE_STATE;
 455         }
 456
 457         if (!io->dest) {
 458                 return NT_STATUS_INVALID_ADDRESS;
 459         }
 460
 461         state = talloc(cldap, struct cldap_reply_state);
 462         NT_STATUS_HAVE_NO_MEMORY(state);
 463
 464         state->dest = tsocket_address_copy(io->dest, state);
 465         if (!state->dest) {
 466                 goto nomem;
 467         }
 468
 469         msg = talloc(state, struct ldap_message);
 470         if (!msg) {
 471                 goto nomem;
 472         }
 473
 474         msg->messageid       = io->messageid;
 475         msg->controls        = NULL;
 476
 477         if (io->response) {
 478                 msg->type = LDAP_TAG_SearchResultEntry;
 479                 msg->r.SearchResultEntry = *io->response;
 480
 481                 if (!ldap_encode(msg, NULL, &blob1, state)) {
 482                         status = NT_STATUS_INVALID_PARAMETER;
 483                         goto failed;
 484                 }
 485         } else {
 486                 blob1 = data_blob(NULL, 0);
 487         }
 488
 489         msg->type = LDAP_TAG_SearchResultDone;
 490         msg->r.SearchResultDone = *io->result;
 491
 492         if (!ldap_encode(msg, NULL, &blob2, state)) {
 493                 status = NT_STATUS_INVALID_PARAMETER;
 494                 goto failed;
 495         }
 496         talloc_free(msg);
 497
 498         state->blob = data_blob_talloc(state, NULL, blob1.length + blob2.length);
 499         if (!state->blob.data) {
 500                 goto nomem;
 501         }
 502
 503         memcpy(state->blob.data, blob1.data, blob1.length);
 504         memcpy(state->blob.data+blob1.length, blob2.data, blob2.length);
 505         data_blob_free(&blob1);
 506         data_blob_free(&blob2);
 507
 508         subreq = tdgram_sendto_queue_send(state,
 509                                           cldap->incoming.ev,
 510                                           cldap->sock,
 511                                           cldap->send_queue,
 512                                           state->blob.data,
 513                                           state->blob.length,
 514                                           state->dest);
 515         if (!subreq) {
 516                 goto nomem;
 517         }
 518         /* the callback will just free the state, as we don't need a result */
 519         tevent_req_set_callback(subreq, cldap_reply_state_destroy, state);
 520
 521         return NT_STATUS_OK;
 522
 523 nomem:
 524         status = NT_STATUS_NO_MEMORY;
 525 failed:
 526         talloc_free(state);
 527         return status;
 528 }
 529
 530 static void cldap_reply_state_destroy(struct tevent_req *subreq)
 531 {
 532         struct cldap_reply_state *state = tevent_req_callback_data(subreq,
 533                                           struct cldap_reply_state);
 534
 535         /* we don't want to know the result here, we just free the state */
 536         talloc_free(subreq);
 537         talloc_free(state);
 538 }
 539
 540 static int cldap_search_state_destructor(struct cldap_search_state *s)
 541 {
 542         if (s->caller.cldap) {
 543                 if (s->message_id != -1) {
 544                         idr_remove(s->caller.cldap->searches.idr, s->message_id);
 545                         s->message_id = -1;
 546                 }
 547                 DLIST_REMOVE(s->caller.cldap->searches.list, s);
 548                 cldap_recvfrom_stop(s->caller.cldap);
 549                 ZERO_STRUCT(s->caller);
 550         }
 551
 552         return 0;
 553 }
 554
 555 static void cldap_search_state_queue_done(struct tevent_req *subreq);
 556 static void cldap_search_state_wakeup_done(struct tevent_req *subreq);
 557
 558 /*
 559   queue a cldap reply for send
 560 */
 561 struct tevent_req *cldap_search_send(TALLOC_CTX *mem_ctx,
 562                                      struct tevent_context *ev,
 563                                      struct cldap_socket *cldap,
 564                                      const struct cldap_search *io)
 565 {
 566         struct tevent_req *req, *subreq;
 567         struct cldap_search_state *state = NULL;
 568         struct ldap_message *msg;
 569         struct ldap_SearchRequest *search;
 570         struct timeval now;
 571         struct timeval end;
 572         uint32_t i;
 573         int ret;
 574
 575         req = tevent_req_create(mem_ctx, &state,
 576                                 struct cldap_search_state);
 577         if (!req) {
 578                 return NULL;
 579         }
 580         ZERO_STRUCTP(state);
 581         state->caller.ev = ev;
 582         state->req = req;
 583         state->caller.cldap = cldap;
 584         state->message_id = -1;
 585
 586         talloc_set_destructor(state, cldap_search_state_destructor);
 587
 588         if (io->in.dest_address) {
 589                 if (cldap->connected) {
 590                         tevent_req_nterror(req, NT_STATUS_PIPE_CONNECTED);
 591                         goto post;
 592                 }
 593                 ret = tsocket_address_inet_from_strings(state,
 594                                                         "ip",
 595                                                         io->in.dest_address,
 596                                                         io->in.dest_port,
 597                                                         &state->request.dest);
 598                 if (ret != 0) {
 599                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 600                         goto post;
 601                 }
 602         } else {
 603                 if (!cldap->connected) {
 604                         tevent_req_nterror(req, NT_STATUS_INVALID_ADDRESS);
 605                         goto post;
 606                 }
 607                 state->request.dest = NULL;
 608         }
 609
 610         state->message_id = idr_get_new_random(cldap->searches.idr,
 611                                                state, UINT16_MAX);
 612         if (state->message_id == -1) {
 613                 tevent_req_nterror(req, NT_STATUS_INSUFFICIENT_RESOURCES);
 614                 goto post;
 615         }
 616
 617         msg = talloc(state, struct ldap_message);
 618         if (tevent_req_nomem(msg, req)) {
 619                 goto post;
 620         }
 621
 622         msg->messageid  = state->message_id;
 623         msg->type       = LDAP_TAG_SearchRequest;
 624         msg->controls   = NULL;
 625         search = &msg->r.SearchRequest;
 626
 627         search->basedn          = "";
 628         search->scope           = LDAP_SEARCH_SCOPE_BASE;
 629         search->deref           = LDAP_DEREFERENCE_NEVER;
 630         search->timelimit       = 0;
 631         search->sizelimit       = 0;
 632         search->attributesonly  = false;
 633         search->num_attributes  = str_list_length(io->in.attributes);
 634         search->attributes      = io->in.attributes;
 635         search->tree            = ldb_parse_tree(msg, io->in.filter);
 636         if (tevent_req_nomem(search->tree, req)) {
 637                 goto post;
 638         }
 639
 640         if (!ldap_encode(msg, NULL, &state->request.blob, state)) {
 641                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 642                 goto post;
 643         }
 644         talloc_free(msg);
 645
 646         state->request.idx = 0;
 647         state->request.delay = 10*1000*1000;
 648         state->request.count = 3;
 649         if (io->in.timeout > 0) {
 650                 state->request.delay = io->in.timeout * 1000 * 1000;
 651                 state->request.count = io->in.retries + 1;
 652         }
 653
 654         now = tevent_timeval_current();
 655         end = now;
 656         for (i = 0; i < state->request.count; i++) {
 657                 end = tevent_timeval_add(&end, state->request.delay / 1000000,
 658                                          state->request.delay % 1000000);
 659         }
 660
 661         if (!tevent_req_set_endtime(req, state->caller.ev, end)) {
 662                 tevent_req_oom(req);
 663                 goto post;
 664         }
 665
 666         subreq = tdgram_sendto_queue_send(state,
 667                                           state->caller.ev,
 668                                           state->caller.cldap->sock,
 669                                           state->caller.cldap->send_queue,
 670                                           state->request.blob.data,
 671                                           state->request.blob.length,
 672                                           state->request.dest);
 673         if (tevent_req_nomem(subreq, req)) {
 674                 goto post;
 675         }
 676         tevent_req_set_callback(subreq, cldap_search_state_queue_done, req);
 677
 678         DLIST_ADD_END(cldap->searches.list, state, struct cldap_search_state *);
 679
 680         return req;
 681
 682  post:
 683         return tevent_req_post(req, state->caller.ev);
 684 }
 685
 686 static void cldap_search_state_queue_done(struct tevent_req *subreq)
 687 {
 688         struct tevent_req *req = tevent_req_callback_data(subreq,
 689                                  struct tevent_req);
 690         struct cldap_search_state *state = tevent_req_data(req,
 691                                            struct cldap_search_state);
 692         ssize_t ret;
 693         int sys_errno = 0;
 694         struct timeval next;
 695
 696         ret = tdgram_sendto_queue_recv(subreq, &sys_errno);
 697         talloc_free(subreq);
 698         if (ret == -1) {
 699                 NTSTATUS status;
 700                 status = map_nt_error_from_unix_common(sys_errno);
 701                 DLIST_REMOVE(state->caller.cldap->searches.list, state);
 702                 ZERO_STRUCT(state->caller.cldap);
 703                 tevent_req_nterror(req, status);
 704                 return;
 705         }
 706
 707         state->request.idx++;
 708
 709         /* wait for incoming traffic */
 710         if (!cldap_recvfrom_setup(state->caller.cldap)) {
 711                 tevent_req_oom(req);
 712                 return;
 713         }
 714
 715         if (state->request.idx > state->request.count) {
 716                 /* we just wait for the response or a timeout */
 717                 return;
 718         }
 719
 720         next = tevent_timeval_current_ofs(state->request.delay / 1000000,
 721                                           state->request.delay % 1000000);
 722         subreq = tevent_wakeup_send(state,
 723                                     state->caller.ev,
 724                                     next);
 725         if (tevent_req_nomem(subreq, req)) {
 726                 return;
 727         }
 728         tevent_req_set_callback(subreq, cldap_search_state_wakeup_done, req);
 729 }
 730
 731 static void cldap_search_state_wakeup_done(struct tevent_req *subreq)
 732 {
 733         struct tevent_req *req = tevent_req_callback_data(subreq,
 734                                  struct tevent_req);
 735         struct cldap_search_state *state = tevent_req_data(req,
 736                                            struct cldap_search_state);
 737         bool ok;
 738
 739         ok = tevent_wakeup_recv(subreq);
 740         talloc_free(subreq);
 741         if (!ok) {
 742                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 743                 return;
 744         }
 745
 746         subreq = tdgram_sendto_queue_send(state,
 747                                           state->caller.ev,
 748                                           state->caller.cldap->sock,
 749                                           state->caller.cldap->send_queue,
 750                                           state->request.blob.data,
 751                                           state->request.blob.length,
 752                                           state->request.dest);
 753         if (tevent_req_nomem(subreq, req)) {
 754                 return;
 755         }
 756         tevent_req_set_callback(subreq, cldap_search_state_queue_done, req);
 757 }
 758
 759 /*
 760   receive a cldap reply
 761 */
 762 NTSTATUS cldap_search_recv(struct tevent_req *req,
 763                            TALLOC_CTX *mem_ctx,
 764                            struct cldap_search *io)
 765 {
 766         struct cldap_search_state *state = tevent_req_data(req,
 767                                            struct cldap_search_state);
 768         struct ldap_message *ldap_msg;
 769         NTSTATUS status;
 770
 771         if (tevent_req_is_nterror(req, &status)) {
 772                 goto failed;
 773         }
 774
 775         ldap_msg = talloc(mem_ctx, struct ldap_message);
 776         if (!ldap_msg) {
 777                 goto nomem;
 778         }
 779
 780         status = ldap_decode(state->response.asn1, NULL, ldap_msg);
 781         if (!NT_STATUS_IS_OK(status)) {
 782                 goto failed;
 783         }
 784
 785         ZERO_STRUCT(io->out);
 786
 787         /* the first possible form has a search result in first place */
 788         if (ldap_msg->type == LDAP_TAG_SearchResultEntry) {
 789                 io->out.response = talloc(mem_ctx, struct ldap_SearchResEntry);
 790                 if (!io->out.response) {
 791                         goto nomem;
 792                 }
 793                 *io->out.response = ldap_msg->r.SearchResultEntry;
 794
 795                 /* decode the 2nd part */
 796                 status = ldap_decode(state->response.asn1, NULL, ldap_msg);
 797                 if (!NT_STATUS_IS_OK(status)) {
 798                         goto failed;
 799                 }
 800         }
 801
 802         if (ldap_msg->type != LDAP_TAG_SearchResultDone) {
 803                 status = NT_STATUS_LDAP(LDAP_PROTOCOL_ERROR);
 804                 goto failed;
 805         }
 806
 807         io->out.result = talloc(mem_ctx, struct ldap_Result);
 808         if (!io->out.result) {
 809                 goto nomem;
 810         }
 811         *io->out.result = ldap_msg->r.SearchResultDone;
 812
 813         if (io->out.result->resultcode != LDAP_SUCCESS) {
 814                 status = NT_STATUS_LDAP(io->out.result->resultcode);
 815                 goto failed;
 816         }
 817
 818         tevent_req_received(req);
 819         return NT_STATUS_OK;
 820
 821 nomem:
 822         status = NT_STATUS_NO_MEMORY;
 823 failed:
 824         tevent_req_received(req);
 825         return status;
 826 }
 827
 828
 829 /*
 830   synchronous cldap search
 831 */
 832 NTSTATUS cldap_search(struct cldap_socket *cldap,
 833                       TALLOC_CTX *mem_ctx,
 834                       struct cldap_search *io)
 835 {
 836         TALLOC_CTX *frame;
 837         struct tevent_req *req;
 838         struct tevent_context *ev;
 839         NTSTATUS status;
 840
 841         if (cldap->searches.list) {
 842                 return NT_STATUS_PIPE_BUSY;
 843         }
 844
 845         if (cldap->incoming.handler) {
 846                 return NT_STATUS_INVALID_PIPE_STATE;
 847         }
 848
 849         frame = talloc_stackframe();
 850
 851         ev = samba_tevent_context_init(frame);
 852         if (ev == NULL) {
 853                 TALLOC_FREE(frame);
 854                 return NT_STATUS_NO_MEMORY;
 855         }
 856
 857         req = cldap_search_send(mem_ctx, ev, cldap, io);
 858         if (req == NULL) {
 859                 TALLOC_FREE(frame);
 860                 return NT_STATUS_NO_MEMORY;
 861         }
 862
 863         if (!tevent_req_poll(req, ev)) {
 864                 status = map_nt_error_from_unix_common(errno);
 865                 TALLOC_FREE(frame);
 866                 return status;
 867         }
 868
 869         status = cldap_search_recv(req, mem_ctx, io);
 870         if (!NT_STATUS_IS_OK(status)) {
 871                 TALLOC_FREE(frame);
 872                 return status;
 873         }
 874
 875         TALLOC_FREE(frame);
 876         return NT_STATUS_OK;
 877 }
 878
 879 struct cldap_netlogon_state {
 880         struct cldap_search search;
 881 };
 882
 883 char *cldap_netlogon_create_filter(TALLOC_CTX *mem_ctx,
 884                                    const struct cldap_netlogon *io)
 885 {
 886         char *filter;
 887
 888         filter = talloc_asprintf(mem_ctx, "(&(NtVer=%s)",
 889                                  ldap_encode_ndr_uint32(mem_ctx, io->in.version));
 890         if (filter == NULL)
 891                 return NULL;
 892
 893         if (io->in.user) {
 894                 filter = talloc_asprintf_append_buffer(filter, "(User=%s)", io->in.user);
 895                 if (filter == NULL) {
 896                         return NULL;
 897                 }
 898         }
 899         if (io->in.host) {
 900                 filter = talloc_asprintf_append_buffer(filter, "(Host=%s)", io->in.host);
 901                 if (filter == NULL) {
 902                         return NULL;
 903                 }
 904         }
 905         if (io->in.realm) {
 906                 filter = talloc_asprintf_append_buffer(filter, "(DnsDomain=%s)", io->in.realm);
 907                 if (filter == NULL) {
 908                         return NULL;
 909                 }
 910         }
 911         if (io->in.acct_control != -1) {
 912                 filter = talloc_asprintf_append_buffer(filter, "(AAC=%s)",
 913                                                 ldap_encode_ndr_uint32(mem_ctx, io->in.acct_control));
 914                 if (filter == NULL) {
 915                         return NULL;
 916                 }
 917         }
 918         if (io->in.domain_sid) {
 919                 struct dom_sid *sid = dom_sid_parse_talloc(mem_ctx, io->in.domain_sid);
 920
 921                 filter = talloc_asprintf_append_buffer(filter, "(domainSid=%s)",
 922                                                 ldap_encode_ndr_dom_sid(mem_ctx, sid));
 923                 if (filter == NULL) {
 924                         return NULL;
 925                 }
 926         }
 927         if (io->in.domain_guid) {
 928                 struct GUID guid;
 929                 GUID_from_string(io->in.domain_guid, &guid);
 930
 931                 filter = talloc_asprintf_append_buffer(filter, "(DomainGuid=%s)",
 932                                                 ldap_encode_ndr_GUID(mem_ctx, &guid));
 933                 if (filter == NULL) {
 934                         return NULL;
 935                 }
 936         }
 937         filter = talloc_asprintf_append_buffer(filter, ")");
 938
 939         return filter;
 940 }
 941
 942 static void cldap_netlogon_state_done(struct tevent_req *subreq);
 943 /*
 944   queue a cldap netlogon for send
 945 */
 946 struct tevent_req *cldap_netlogon_send(TALLOC_CTX *mem_ctx,
 947                                        struct tevent_context *ev,
 948                                        struct cldap_socket *cldap,
 949                                        const struct cldap_netlogon *io)
 950 {
 951         struct tevent_req *req, *subreq;
 952         struct cldap_netlogon_state *state;
 953         char *filter;
 954         static const char * const attr[] = { "NetLogon", NULL };
 955
 956         req = tevent_req_create(mem_ctx, &state,
 957                                 struct cldap_netlogon_state);
 958         if (!req) {
 959                 return NULL;
 960         }
 961
 962         filter = cldap_netlogon_create_filter(state, io);
 963         if (tevent_req_nomem(filter, req)) {
 964                 goto post;
 965         }
 966
 967         if (io->in.dest_address) {
 968                 state->search.in.dest_address = talloc_strdup(state,
 969                                                 io->in.dest_address);
 970                 if (tevent_req_nomem(state->search.in.dest_address, req)) {
 971                         goto post;
 972                 }
 973                 state->search.in.dest_port = io->in.dest_port;
 974         } else {
 975                 state->search.in.dest_address   = NULL;
 976                 state->search.in.dest_port      = 0;
 977         }
 978         state->search.in.filter         = filter;
 979         state->search.in.attributes     = attr;
 980         state->search.in.timeout        = 2;
 981         state->search.in.retries        = 2;
 982
 983         subreq = cldap_search_send(state, ev, cldap, &state->search);
 984         if (tevent_req_nomem(subreq, req)) {
 985                 goto post;
 986         }
 987         tevent_req_set_callback(subreq, cldap_netlogon_state_done, req);
 988
 989         return req;
 990 post:
 991         return tevent_req_post(req, ev);
 992 }
 993
 994 static void cldap_netlogon_state_done(struct tevent_req *subreq)
 995 {
 996         struct tevent_req *req = tevent_req_callback_data(subreq,
 997                                  struct tevent_req);
 998         struct cldap_netlogon_state *state = tevent_req_data(req,
 999                                              struct cldap_netlogon_state);
1000         NTSTATUS status;
1001
1002         status = cldap_search_recv(subreq, state, &state->search);
1003         talloc_free(subreq);
1004
1005         if (tevent_req_nterror(req, status)) {
1006                 return;
1007         }
1008
1009         tevent_req_done(req);
1010 }
1011
1012 /*
1013   receive a cldap netlogon reply
1014 */
1015 NTSTATUS cldap_netlogon_recv(struct tevent_req *req,
1016                              TALLOC_CTX *mem_ctx,
1017                              struct cldap_netlogon *io)
1018 {
1019         struct cldap_netlogon_state *state = tevent_req_data(req,
1020                                              struct cldap_netlogon_state);
1021         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
1022         DATA_BLOB *data;
1023
1024         if (tevent_req_is_nterror(req, &status)) {
1025                 goto failed;
1026         }
1027
1028         if (state->search.out.response == NULL) {
1029                 status = NT_STATUS_NOT_FOUND;
1030                 goto failed;
1031         }
1032
1033         if (state->search.out.response->num_attributes != 1 ||
1034             strcasecmp(state->search.out.response->attributes[0].name, "netlogon") != 0 ||
1035             state->search.out.response->attributes[0].num_values != 1 ||
1036             state->search.out.response->attributes[0].values->length < 2) {
1037                 status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
1038                 goto failed;
1039         }
1040         data = state->search.out.response->attributes[0].values;
1041
1042         status = pull_netlogon_samlogon_response(data, mem_ctx,
1043                                                  &io->out.netlogon);
1044         if (!NT_STATUS_IS_OK(status)) {
1045                 goto failed;
1046         }
1047
1048         if (io->in.map_response) {
1049                 map_netlogon_samlogon_response(&io->out.netlogon);
1050         }
1051
1052         status =  NT_STATUS_OK;
1053 failed:
1054         tevent_req_received(req);
1055         return status;
1056 }
1057
1058 /*
1059   sync cldap netlogon search
1060 */
1061 NTSTATUS cldap_netlogon(struct cldap_socket *cldap,
1062                         TALLOC_CTX *mem_ctx,
1063                         struct cldap_netlogon *io)
1064 {
1065         TALLOC_CTX *frame;
1066         struct tevent_req *req;
1067         struct tevent_context *ev;
1068         NTSTATUS status;
1069
1070         if (cldap->searches.list) {
1071                 return NT_STATUS_PIPE_BUSY;
1072         }
1073
1074         if (cldap->incoming.handler) {
1075                 return NT_STATUS_INVALID_PIPE_STATE;
1076         }
1077
1078         frame = talloc_stackframe();
1079
1080         ev = samba_tevent_context_init(frame);
1081         if (ev == NULL) {
1082                 TALLOC_FREE(frame);
1083                 return NT_STATUS_NO_MEMORY;
1084         }
1085
1086         req = cldap_netlogon_send(mem_ctx, ev, cldap, io);
1087         if (req == NULL) {
1088                 TALLOC_FREE(frame);
1089                 return NT_STATUS_NO_MEMORY;
1090         }
1091
1092         if (!tevent_req_poll(req, ev)) {
1093                 status = map_nt_error_from_unix_common(errno);
1094                 TALLOC_FREE(frame);
1095                 return status;
1096         }
1097
1098         status = cldap_netlogon_recv(req, mem_ctx, io);
1099         if (!NT_STATUS_IS_OK(status)) {
1100                 TALLOC_FREE(frame);
1101                 return status;
1102         }
1103
1104         TALLOC_FREE(frame);
1105         return NT_STATUS_OK;
1106 }
1107
1108
1109 /*
1110   send an empty reply (used on any error, so the client doesn't keep waiting
1111   or send the bad request again)
1112 */
1113 NTSTATUS cldap_empty_reply(struct cldap_socket *cldap,
1114                            uint32_t message_id,
1115                            struct tsocket_address *dest)
1116 {
1117         NTSTATUS status;
1118         struct cldap_reply reply;
1119         struct ldap_Result result;
1120
1121         reply.messageid    = message_id;
1122         reply.dest         = dest;
1123         reply.response     = NULL;
1124         reply.result       = &result;
1125
1126         ZERO_STRUCT(result);
1127
1128         status = cldap_reply_send(cldap, &reply);
1129
1130         return status;
1131 }
1132
1133 /*
1134   send an error reply (used on any error, so the client doesn't keep waiting
1135   or send the bad request again)
1136 */
1137 NTSTATUS cldap_error_reply(struct cldap_socket *cldap,
1138                            uint32_t message_id,
1139                            struct tsocket_address *dest,
1140                            int resultcode,
1141                            const char *errormessage)
1142 {
1143         NTSTATUS status;
1144         struct cldap_reply reply;
1145         struct ldap_Result result;
1146
1147         reply.messageid    = message_id;
1148         reply.dest         = dest;
1149         reply.response     = NULL;
1150         reply.result       = &result;
1151
1152         ZERO_STRUCT(result);
1153         result.resultcode       = resultcode;
1154         result.errormessage     = errormessage;
1155
1156         status = cldap_reply_send(cldap, &reply);
1157
1158         return status;
1159 }
1160
1161
1162 /*
1163   send a netlogon reply
1164 */
1165 NTSTATUS cldap_netlogon_reply(struct cldap_socket *cldap,
1166                               uint32_t message_id,
1167                               struct tsocket_address *dest,
1168                               uint32_t version,
1169                               struct netlogon_samlogon_response *netlogon)
1170 {
1171         NTSTATUS status;
1172         struct cldap_reply reply;
1173         struct ldap_SearchResEntry response;
1174         struct ldap_Result result;
1175         TALLOC_CTX *tmp_ctx = talloc_new(cldap);
1176         DATA_BLOB blob;
1177
1178         status = push_netlogon_samlogon_response(&blob, tmp_ctx,
1179                                                  netlogon);
1180         if (!NT_STATUS_IS_OK(status)) {
1181                 talloc_free(tmp_ctx);
1182                 return status;
1183         }
1184         reply.messageid    = message_id;
1185         reply.dest         = dest;
1186         reply.response     = &response;
1187         reply.result       = &result;
1188
1189         ZERO_STRUCT(result);
1190
1191         response.dn = "";
1192         response.num_attributes = 1;
1193         response.attributes = talloc(tmp_ctx, struct ldb_message_element);
1194         NT_STATUS_HAVE_NO_MEMORY(response.attributes);
1195         response.attributes->name = "netlogon";
1196         response.attributes->num_values = 1;
1197         response.attributes->values = &blob;
1198
1199         status = cldap_reply_send(cldap, &reply);
1200
1201         talloc_free(tmp_ctx);
1202
1203         return status;
1204 }
1205