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         /*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_common(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                            const struct tsocket_address *local_addr,
 308                            const struct tsocket_address *remote_addr,
 309                            struct cldap_socket **_cldap)
 310 {
 311         struct cldap_socket *c = NULL;
 312         struct tsocket_address *any = NULL;
 313         NTSTATUS status;
 314         int ret;
 315
 316         c = talloc_zero(mem_ctx, struct cldap_socket);
 317         if (!c) {
 318                 goto nomem;
 319         }
 320
 321         if (!local_addr) {
 322                 /* we use ipv4 here instead of ip, as otherwise we end
 323                    up with a PF_INET6 socket, and sendto() for ipv4
 324                    addresses will fail. That breaks cldap name
 325                    resolution for winbind to IPv4 hosts. */
 326                 ret = tsocket_address_inet_from_strings(c, "ipv4",
 327                                                         NULL, 0,
 328                                                         &any);
 329                 if (ret != 0) {
 330                         status = map_nt_error_from_unix_common(errno);
 331                         goto nterror;
 332                 }
 333                 local_addr = any;
 334         }
 335
 336         c->searches.idr = idr_init(c);
 337         if (!c->searches.idr) {
 338                 goto nomem;
 339         }
 340
 341         ret = tdgram_inet_udp_socket(local_addr, remote_addr,
 342                                      c, &c->sock);
 343         if (ret != 0) {
 344                 status = map_nt_error_from_unix_common(errno);
 345                 goto nterror;
 346         }
 347         talloc_free(any);
 348
 349         if (remote_addr) {
 350                 c->connected = true;
 351         }
 352
 353         c->send_queue = tevent_queue_create(c, "cldap_send_queue");
 354         if (!c->send_queue) {
 355                 goto nomem;
 356         }
 357
 358         talloc_set_destructor(c, cldap_socket_destructor);
 359
 360         *_cldap = c;
 361         return NT_STATUS_OK;
 362
 363 nomem:
 364         status = NT_STATUS_NO_MEMORY;
 365 nterror:
 366         talloc_free(c);
 367         return status;
 368 }
 369
 370 /*
 371   setup a handler for incoming requests
 372 */
 373 NTSTATUS cldap_set_incoming_handler(struct cldap_socket *c,
 374                                     struct tevent_context *ev,
 375                                     void (*handler)(struct cldap_socket *,
 376                                                     void *private_data,
 377                                                     struct cldap_incoming *),
 378                                     void *private_data)
 379 {
 380         if (c->connected) {
 381                 return NT_STATUS_PIPE_CONNECTED;
 382         }
 383
 384         c->incoming.ev = ev;
 385         c->incoming.handler = handler;
 386         c->incoming.private_data = private_data;
 387
 388         if (!cldap_recvfrom_setup(c)) {
 389                 ZERO_STRUCT(c->incoming);
 390                 return NT_STATUS_NO_MEMORY;
 391         }
 392
 393         return NT_STATUS_OK;
 394 }
 395
 396 struct cldap_reply_state {
 397         struct tsocket_address *dest;
 398         DATA_BLOB blob;
 399 };
 400
 401 static void cldap_reply_state_destroy(struct tevent_req *subreq);
 402
 403 /*
 404   queue a cldap reply for send
 405 */
 406 NTSTATUS cldap_reply_send(struct cldap_socket *cldap, struct cldap_reply *io)
 407 {
 408         struct cldap_reply_state *state = NULL;
 409         struct ldap_message *msg;
 410         DATA_BLOB blob1, blob2;
 411         NTSTATUS status;
 412         struct tevent_req *subreq;
 413
 414         if (cldap->connected) {
 415                 return NT_STATUS_PIPE_CONNECTED;
 416         }
 417
 418         if (cldap->incoming.ev == NULL) {
 419                 return NT_STATUS_INVALID_PIPE_STATE;
 420         }
 421
 422         if (!io->dest) {
 423                 return NT_STATUS_INVALID_ADDRESS;
 424         }
 425
 426         state = talloc(cldap, struct cldap_reply_state);
 427         NT_STATUS_HAVE_NO_MEMORY(state);
 428
 429         state->dest = tsocket_address_copy(io->dest, state);
 430         if (!state->dest) {
 431                 goto nomem;
 432         }
 433
 434         msg = talloc(state, struct ldap_message);
 435         if (!msg) {
 436                 goto nomem;
 437         }
 438
 439         msg->messageid       = io->messageid;
 440         msg->controls        = NULL;
 441
 442         if (io->response) {
 443                 msg->type = LDAP_TAG_SearchResultEntry;
 444                 msg->r.SearchResultEntry = *io->response;
 445
 446                 if (!ldap_encode(msg, NULL, &blob1, state)) {
 447                         status = NT_STATUS_INVALID_PARAMETER;
 448                         goto failed;
 449                 }
 450         } else {
 451                 blob1 = data_blob(NULL, 0);
 452         }
 453
 454         msg->type = LDAP_TAG_SearchResultDone;
 455         msg->r.SearchResultDone = *io->result;
 456
 457         if (!ldap_encode(msg, NULL, &blob2, state)) {
 458                 status = NT_STATUS_INVALID_PARAMETER;
 459                 goto failed;
 460         }
 461         talloc_free(msg);
 462
 463         state->blob = data_blob_talloc(state, NULL, blob1.length + blob2.length);
 464         if (!state->blob.data) {
 465                 goto nomem;
 466         }
 467
 468         memcpy(state->blob.data, blob1.data, blob1.length);
 469         memcpy(state->blob.data+blob1.length, blob2.data, blob2.length);
 470         data_blob_free(&blob1);
 471         data_blob_free(&blob2);
 472
 473         subreq = tdgram_sendto_queue_send(state,
 474                                           cldap->incoming.ev,
 475                                           cldap->sock,
 476                                           cldap->send_queue,
 477                                           state->blob.data,
 478                                           state->blob.length,
 479                                           state->dest);
 480         if (!subreq) {
 481                 goto nomem;
 482         }
 483         /* the callback will just free the state, as we don't need a result */
 484         tevent_req_set_callback(subreq, cldap_reply_state_destroy, state);
 485
 486         return NT_STATUS_OK;
 487
 488 nomem:
 489         status = NT_STATUS_NO_MEMORY;
 490 failed:
 491         talloc_free(state);
 492         return status;
 493 }
 494
 495 static void cldap_reply_state_destroy(struct tevent_req *subreq)
 496 {
 497         struct cldap_reply_state *state = tevent_req_callback_data(subreq,
 498                                           struct cldap_reply_state);
 499
 500         /* we don't want to know the result here, we just free the state */
 501         talloc_free(subreq);
 502         talloc_free(state);
 503 }
 504
 505 static int cldap_search_state_destructor(struct cldap_search_state *s)
 506 {
 507         if (s->caller.cldap) {
 508                 if (s->message_id != -1) {
 509                         idr_remove(s->caller.cldap->searches.idr, s->message_id);
 510                         s->message_id = -1;
 511                 }
 512                 DLIST_REMOVE(s->caller.cldap->searches.list, s);
 513                 cldap_recvfrom_stop(s->caller.cldap);
 514                 ZERO_STRUCT(s->caller);
 515         }
 516
 517         return 0;
 518 }
 519
 520 static void cldap_search_state_queue_done(struct tevent_req *subreq);
 521 static void cldap_search_state_wakeup_done(struct tevent_req *subreq);
 522
 523 /*
 524   queue a cldap reply for send
 525 */
 526 struct tevent_req *cldap_search_send(TALLOC_CTX *mem_ctx,
 527                                      struct tevent_context *ev,
 528                                      struct cldap_socket *cldap,
 529                                      const struct cldap_search *io)
 530 {
 531         struct tevent_req *req, *subreq;
 532         struct cldap_search_state *state = NULL;
 533         struct ldap_message *msg;
 534         struct ldap_SearchRequest *search;
 535         struct timeval now;
 536         struct timeval end;
 537         uint32_t i;
 538         int ret;
 539
 540         req = tevent_req_create(mem_ctx, &state,
 541                                 struct cldap_search_state);
 542         if (!req) {
 543                 return NULL;
 544         }
 545         ZERO_STRUCTP(state);
 546         state->caller.ev = ev;
 547         state->req = req;
 548         state->caller.cldap = cldap;
 549         state->message_id = -1;
 550
 551         talloc_set_destructor(state, cldap_search_state_destructor);
 552
 553         if (io->in.dest_address) {
 554                 if (cldap->connected) {
 555                         tevent_req_nterror(req, NT_STATUS_PIPE_CONNECTED);
 556                         goto post;
 557                 }
 558                 ret = tsocket_address_inet_from_strings(state,
 559                                                         "ip",
 560                                                         io->in.dest_address,
 561                                                         io->in.dest_port,
 562                                                         &state->request.dest);
 563                 if (ret != 0) {
 564                         tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 565                         goto post;
 566                 }
 567         } else {
 568                 if (!cldap->connected) {
 569                         tevent_req_nterror(req, NT_STATUS_INVALID_ADDRESS);
 570                         goto post;
 571                 }
 572                 state->request.dest = NULL;
 573         }
 574
 575         state->message_id = idr_get_new_random(cldap->searches.idr,
 576                                                state, UINT16_MAX);
 577         if (state->message_id == -1) {
 578                 tevent_req_nterror(req, NT_STATUS_INSUFFICIENT_RESOURCES);
 579                 goto post;
 580         }
 581
 582         msg = talloc(state, struct ldap_message);
 583         if (tevent_req_nomem(msg, req)) {
 584                 goto post;
 585         }
 586
 587         msg->messageid  = state->message_id;
 588         msg->type       = LDAP_TAG_SearchRequest;
 589         msg->controls   = NULL;
 590         search = &msg->r.SearchRequest;
 591
 592         search->basedn          = "";
 593         search->scope           = LDAP_SEARCH_SCOPE_BASE;
 594         search->deref           = LDAP_DEREFERENCE_NEVER;
 595         search->timelimit       = 0;
 596         search->sizelimit       = 0;
 597         search->attributesonly  = false;
 598         search->num_attributes  = str_list_length(io->in.attributes);
 599         search->attributes      = io->in.attributes;
 600         search->tree            = ldb_parse_tree(msg, io->in.filter);
 601         if (tevent_req_nomem(search->tree, req)) {
 602                 goto post;
 603         }
 604
 605         if (!ldap_encode(msg, NULL, &state->request.blob, state)) {
 606                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 607                 goto post;
 608         }
 609         talloc_free(msg);
 610
 611         state->request.idx = 0;
 612         state->request.delay = 10*1000*1000;
 613         state->request.count = 3;
 614         if (io->in.timeout > 0) {
 615                 state->request.delay = io->in.timeout * 1000 * 1000;
 616                 state->request.count = io->in.retries + 1;
 617         }
 618
 619         now = tevent_timeval_current();
 620         end = now;
 621         for (i = 0; i < state->request.count; i++) {
 622                 end = tevent_timeval_add(&end, state->request.delay / 1000000,
 623                                          state->request.delay % 1000000);
 624         }
 625
 626         if (!tevent_req_set_endtime(req, state->caller.ev, end)) {
 627                 tevent_req_oom(req);
 628                 goto post;
 629         }
 630
 631         subreq = tdgram_sendto_queue_send(state,
 632                                           state->caller.ev,
 633                                           state->caller.cldap->sock,
 634                                           state->caller.cldap->send_queue,
 635                                           state->request.blob.data,
 636                                           state->request.blob.length,
 637                                           state->request.dest);
 638         if (tevent_req_nomem(subreq, req)) {
 639                 goto post;
 640         }
 641         tevent_req_set_callback(subreq, cldap_search_state_queue_done, req);
 642
 643         DLIST_ADD_END(cldap->searches.list, state, struct cldap_search_state *);
 644
 645         return req;
 646
 647  post:
 648         return tevent_req_post(req, state->caller.ev);
 649 }
 650
 651 static void cldap_search_state_queue_done(struct tevent_req *subreq)
 652 {
 653         struct tevent_req *req = tevent_req_callback_data(subreq,
 654                                  struct tevent_req);
 655         struct cldap_search_state *state = tevent_req_data(req,
 656                                            struct cldap_search_state);
 657         ssize_t ret;
 658         int sys_errno = 0;
 659         struct timeval next;
 660
 661         ret = tdgram_sendto_queue_recv(subreq, &sys_errno);
 662         talloc_free(subreq);
 663         if (ret == -1) {
 664                 NTSTATUS status;
 665                 status = map_nt_error_from_unix_common(sys_errno);
 666                 DLIST_REMOVE(state->caller.cldap->searches.list, state);
 667                 ZERO_STRUCT(state->caller.cldap);
 668                 tevent_req_nterror(req, status);
 669                 return;
 670         }
 671
 672         state->request.idx++;
 673
 674         /* wait for incoming traffic */
 675         if (!cldap_recvfrom_setup(state->caller.cldap)) {
 676                 tevent_req_oom(req);
 677                 return;
 678         }
 679
 680         if (state->request.idx > state->request.count) {
 681                 /* we just wait for the response or a timeout */
 682                 return;
 683         }
 684
 685         next = tevent_timeval_current_ofs(state->request.delay / 1000000,
 686                                           state->request.delay % 1000000);
 687         subreq = tevent_wakeup_send(state,
 688                                     state->caller.ev,
 689                                     next);
 690         if (tevent_req_nomem(subreq, req)) {
 691                 return;
 692         }
 693         tevent_req_set_callback(subreq, cldap_search_state_wakeup_done, req);
 694 }
 695
 696 static void cldap_search_state_wakeup_done(struct tevent_req *subreq)
 697 {
 698         struct tevent_req *req = tevent_req_callback_data(subreq,
 699                                  struct tevent_req);
 700         struct cldap_search_state *state = tevent_req_data(req,
 701                                            struct cldap_search_state);
 702         bool ok;
 703
 704         ok = tevent_wakeup_recv(subreq);
 705         talloc_free(subreq);
 706         if (!ok) {
 707                 tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 708                 return;
 709         }
 710
 711         subreq = tdgram_sendto_queue_send(state,
 712                                           state->caller.ev,
 713                                           state->caller.cldap->sock,
 714                                           state->caller.cldap->send_queue,
 715                                           state->request.blob.data,
 716                                           state->request.blob.length,
 717                                           state->request.dest);
 718         if (tevent_req_nomem(subreq, req)) {
 719                 return;
 720         }
 721         tevent_req_set_callback(subreq, cldap_search_state_queue_done, req);
 722 }
 723
 724 /*
 725   receive a cldap reply
 726 */
 727 NTSTATUS cldap_search_recv(struct tevent_req *req,
 728                            TALLOC_CTX *mem_ctx,
 729                            struct cldap_search *io)
 730 {
 731         struct cldap_search_state *state = tevent_req_data(req,
 732                                            struct cldap_search_state);
 733         struct ldap_message *ldap_msg;
 734         NTSTATUS status;
 735
 736         if (tevent_req_is_nterror(req, &status)) {
 737                 goto failed;
 738         }
 739
 740         ldap_msg = talloc(mem_ctx, struct ldap_message);
 741         if (!ldap_msg) {
 742                 goto nomem;
 743         }
 744
 745         status = ldap_decode(state->response.asn1, NULL, ldap_msg);
 746         if (!NT_STATUS_IS_OK(status)) {
 747                 goto failed;
 748         }
 749
 750         ZERO_STRUCT(io->out);
 751
 752         /* the first possible form has a search result in first place */
 753         if (ldap_msg->type == LDAP_TAG_SearchResultEntry) {
 754                 io->out.response = talloc(mem_ctx, struct ldap_SearchResEntry);
 755                 if (!io->out.response) {
 756                         goto nomem;
 757                 }
 758                 *io->out.response = ldap_msg->r.SearchResultEntry;
 759
 760                 /* decode the 2nd part */
 761                 status = ldap_decode(state->response.asn1, NULL, ldap_msg);
 762                 if (!NT_STATUS_IS_OK(status)) {
 763                         goto failed;
 764                 }
 765         }
 766
 767         if (ldap_msg->type != LDAP_TAG_SearchResultDone) {
 768                 status = NT_STATUS_LDAP(LDAP_PROTOCOL_ERROR);
 769                 goto failed;
 770         }
 771
 772         io->out.result = talloc(mem_ctx, struct ldap_Result);
 773         if (!io->out.result) {
 774                 goto nomem;
 775         }
 776         *io->out.result = ldap_msg->r.SearchResultDone;
 777
 778         if (io->out.result->resultcode != LDAP_SUCCESS) {
 779                 status = NT_STATUS_LDAP(io->out.result->resultcode);
 780                 goto failed;
 781         }
 782
 783         tevent_req_received(req);
 784         return NT_STATUS_OK;
 785
 786 nomem:
 787         status = NT_STATUS_NO_MEMORY;
 788 failed:
 789         tevent_req_received(req);
 790         return status;
 791 }
 792
 793
 794 /*
 795   synchronous cldap search
 796 */
 797 NTSTATUS cldap_search(struct cldap_socket *cldap,
 798                       TALLOC_CTX *mem_ctx,
 799                       struct cldap_search *io)
 800 {
 801         TALLOC_CTX *frame;
 802         struct tevent_req *req;
 803         struct tevent_context *ev;
 804         NTSTATUS status;
 805
 806         if (cldap->searches.list) {
 807                 return NT_STATUS_PIPE_BUSY;
 808         }
 809
 810         if (cldap->incoming.handler) {
 811                 return NT_STATUS_INVALID_PIPE_STATE;
 812         }
 813
 814         frame = talloc_stackframe();
 815
 816         ev = tevent_context_init(frame);
 817         if (ev == NULL) {
 818                 TALLOC_FREE(frame);
 819                 return NT_STATUS_NO_MEMORY;
 820         }
 821
 822         req = cldap_search_send(mem_ctx, ev, cldap, io);
 823         if (req == NULL) {
 824                 TALLOC_FREE(frame);
 825                 return NT_STATUS_NO_MEMORY;
 826         }
 827
 828         if (!tevent_req_poll(req, ev)) {
 829                 status = map_nt_error_from_unix_common(errno);
 830                 TALLOC_FREE(frame);
 831                 return status;
 832         }
 833
 834         status = cldap_search_recv(req, mem_ctx, io);
 835         if (!NT_STATUS_IS_OK(status)) {
 836                 TALLOC_FREE(frame);
 837                 return status;
 838         }
 839
 840         TALLOC_FREE(frame);
 841         return NT_STATUS_OK;
 842 }
 843
 844 struct cldap_netlogon_state {
 845         struct cldap_search search;
 846 };
 847
 848 static void cldap_netlogon_state_done(struct tevent_req *subreq);
 849 /*
 850   queue a cldap netlogon for send
 851 */
 852 struct tevent_req *cldap_netlogon_send(TALLOC_CTX *mem_ctx,
 853                                        struct tevent_context *ev,
 854                                        struct cldap_socket *cldap,
 855                                        const struct cldap_netlogon *io)
 856 {
 857         struct tevent_req *req, *subreq;
 858         struct cldap_netlogon_state *state;
 859         char *filter;
 860         static const char * const attr[] = { "NetLogon", NULL };
 861
 862         req = tevent_req_create(mem_ctx, &state,
 863                                 struct cldap_netlogon_state);
 864         if (!req) {
 865                 return NULL;
 866         }
 867
 868         filter = talloc_asprintf(state, "(&(NtVer=%s)",
 869                                  ldap_encode_ndr_uint32(state, io->in.version));
 870         if (tevent_req_nomem(filter, req)) {
 871                 goto post;
 872         }
 873         if (io->in.user) {
 874                 filter = talloc_asprintf_append_buffer(filter, "(User=%s)", io->in.user);
 875                 if (tevent_req_nomem(filter, req)) {
 876                         goto post;
 877                 }
 878         }
 879         if (io->in.host) {
 880                 filter = talloc_asprintf_append_buffer(filter, "(Host=%s)", io->in.host);
 881                 if (tevent_req_nomem(filter, req)) {
 882                         goto post;
 883                 }
 884         }
 885         if (io->in.realm) {
 886                 filter = talloc_asprintf_append_buffer(filter, "(DnsDomain=%s)", io->in.realm);
 887                 if (tevent_req_nomem(filter, req)) {
 888                         goto post;
 889                 }
 890         }
 891         if (io->in.acct_control != -1) {
 892                 filter = talloc_asprintf_append_buffer(filter, "(AAC=%s)",
 893                                                 ldap_encode_ndr_uint32(state, io->in.acct_control));
 894                 if (tevent_req_nomem(filter, req)) {
 895                         goto post;
 896                 }
 897         }
 898         if (io->in.domain_sid) {
 899                 struct dom_sid *sid = dom_sid_parse_talloc(state, io->in.domain_sid);
 900                 if (tevent_req_nomem(sid, req)) {
 901                         goto post;
 902                 }
 903                 filter = talloc_asprintf_append_buffer(filter, "(domainSid=%s)",
 904                                                 ldap_encode_ndr_dom_sid(state, sid));
 905                 if (tevent_req_nomem(filter, req)) {
 906                         goto post;
 907                 }
 908         }
 909         if (io->in.domain_guid) {
 910                 struct GUID guid;
 911                 NTSTATUS status;
 912                 status = GUID_from_string(io->in.domain_guid, &guid);
 913                 if (tevent_req_nterror(req, status)) {
 914                         goto post;
 915                 }
 916                 filter = talloc_asprintf_append_buffer(filter, "(DomainGuid=%s)",
 917                                                 ldap_encode_ndr_GUID(state, &guid));
 918                 if (tevent_req_nomem(filter, req)) {
 919                         goto post;
 920                 }
 921         }
 922         filter = talloc_asprintf_append_buffer(filter, ")");
 923         if (tevent_req_nomem(filter, req)) {
 924                 goto post;
 925         }
 926
 927         if (io->in.dest_address) {
 928                 state->search.in.dest_address = talloc_strdup(state,
 929                                                 io->in.dest_address);
 930                 if (tevent_req_nomem(state->search.in.dest_address, req)) {
 931                         goto post;
 932                 }
 933                 state->search.in.dest_port = io->in.dest_port;
 934         } else {
 935                 state->search.in.dest_address   = NULL;
 936                 state->search.in.dest_port      = 0;
 937         }
 938         state->search.in.filter         = filter;
 939         state->search.in.attributes     = attr;
 940         state->search.in.timeout        = 2;
 941         state->search.in.retries        = 2;
 942
 943         subreq = cldap_search_send(state, ev, cldap, &state->search);
 944         if (tevent_req_nomem(subreq, req)) {
 945                 goto post;
 946         }
 947         tevent_req_set_callback(subreq, cldap_netlogon_state_done, req);
 948
 949         return req;
 950 post:
 951         return tevent_req_post(req, ev);
 952 }
 953
 954 static void cldap_netlogon_state_done(struct tevent_req *subreq)
 955 {
 956         struct tevent_req *req = tevent_req_callback_data(subreq,
 957                                  struct tevent_req);
 958         struct cldap_netlogon_state *state = tevent_req_data(req,
 959                                              struct cldap_netlogon_state);
 960         NTSTATUS status;
 961
 962         status = cldap_search_recv(subreq, state, &state->search);
 963         talloc_free(subreq);
 964
 965         if (tevent_req_nterror(req, status)) {
 966                 return;
 967         }
 968
 969         tevent_req_done(req);
 970 }
 971
 972 /*
 973   receive a cldap netlogon reply
 974 */
 975 NTSTATUS cldap_netlogon_recv(struct tevent_req *req,
 976                              TALLOC_CTX *mem_ctx,
 977                              struct cldap_netlogon *io)
 978 {
 979         struct cldap_netlogon_state *state = tevent_req_data(req,
 980                                              struct cldap_netlogon_state);
 981         NTSTATUS status;
 982         DATA_BLOB *data;
 983
 984         if (tevent_req_is_nterror(req, &status)) {
 985                 goto failed;
 986         }
 987
 988         if (state->search.out.response == NULL) {
 989                 status = NT_STATUS_NOT_FOUND;
 990                 goto failed;
 991         }
 992
 993         if (state->search.out.response->num_attributes != 1 ||
 994             strcasecmp(state->search.out.response->attributes[0].name, "netlogon") != 0 ||
 995             state->search.out.response->attributes[0].num_values != 1 ||
 996             state->search.out.response->attributes[0].values->length < 2) {
 997                 status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
 998                 goto failed;
 999         }
1000         data = state->search.out.response->attributes[0].values;
1001
1002         status = pull_netlogon_samlogon_response(data, mem_ctx,
1003                                                  &io->out.netlogon);
1004         if (!NT_STATUS_IS_OK(status)) {
1005                 goto failed;
1006         }
1007
1008         if (io->in.map_response) {
1009                 map_netlogon_samlogon_response(&io->out.netlogon);
1010         }
1011
1012         status =  NT_STATUS_OK;
1013 failed:
1014         tevent_req_received(req);
1015         return status;
1016 }
1017
1018 /*
1019   sync cldap netlogon search
1020 */
1021 NTSTATUS cldap_netlogon(struct cldap_socket *cldap,
1022                         TALLOC_CTX *mem_ctx,
1023                         struct cldap_netlogon *io)
1024 {
1025         TALLOC_CTX *frame;
1026         struct tevent_req *req;
1027         struct tevent_context *ev;
1028         NTSTATUS status;
1029
1030         if (cldap->searches.list) {
1031                 return NT_STATUS_PIPE_BUSY;
1032         }
1033
1034         if (cldap->incoming.handler) {
1035                 return NT_STATUS_INVALID_PIPE_STATE;
1036         }
1037
1038         frame = talloc_stackframe();
1039
1040         ev = tevent_context_init(frame);
1041         if (ev == NULL) {
1042                 TALLOC_FREE(frame);
1043                 return NT_STATUS_NO_MEMORY;
1044         }
1045
1046         req = cldap_netlogon_send(mem_ctx, ev, cldap, io);
1047         if (req == NULL) {
1048                 TALLOC_FREE(frame);
1049                 return NT_STATUS_NO_MEMORY;
1050         }
1051
1052         if (!tevent_req_poll(req, ev)) {
1053                 status = map_nt_error_from_unix_common(errno);
1054                 TALLOC_FREE(frame);
1055                 return status;
1056         }
1057
1058         status = cldap_netlogon_recv(req, mem_ctx, io);
1059         if (!NT_STATUS_IS_OK(status)) {
1060                 TALLOC_FREE(frame);
1061                 return status;
1062         }
1063
1064         TALLOC_FREE(frame);
1065         return NT_STATUS_OK;
1066 }
1067
1068
1069 /*
1070   send an empty reply (used on any error, so the client doesn't keep waiting
1071   or send the bad request again)
1072 */
1073 NTSTATUS cldap_empty_reply(struct cldap_socket *cldap,
1074                            uint32_t message_id,
1075                            struct tsocket_address *dest)
1076 {
1077         NTSTATUS status;
1078         struct cldap_reply reply;
1079         struct ldap_Result result;
1080
1081         reply.messageid    = message_id;
1082         reply.dest         = dest;
1083         reply.response     = NULL;
1084         reply.result       = &result;
1085
1086         ZERO_STRUCT(result);
1087
1088         status = cldap_reply_send(cldap, &reply);
1089
1090         return status;
1091 }
1092
1093 /*
1094   send an error reply (used on any error, so the client doesn't keep waiting
1095   or send the bad request again)
1096 */
1097 NTSTATUS cldap_error_reply(struct cldap_socket *cldap,
1098                            uint32_t message_id,
1099                            struct tsocket_address *dest,
1100                            int resultcode,
1101                            const char *errormessage)
1102 {
1103         NTSTATUS status;
1104         struct cldap_reply reply;
1105         struct ldap_Result result;
1106
1107         reply.messageid    = message_id;
1108         reply.dest         = dest;
1109         reply.response     = NULL;
1110         reply.result       = &result;
1111
1112         ZERO_STRUCT(result);
1113         result.resultcode       = resultcode;
1114         result.errormessage     = errormessage;
1115
1116         status = cldap_reply_send(cldap, &reply);
1117
1118         return status;
1119 }
1120
1121
1122 /*
1123   send a netlogon reply
1124 */
1125 NTSTATUS cldap_netlogon_reply(struct cldap_socket *cldap,
1126                               uint32_t message_id,
1127                               struct tsocket_address *dest,
1128                               uint32_t version,
1129                               struct netlogon_samlogon_response *netlogon)
1130 {
1131         NTSTATUS status;
1132         struct cldap_reply reply;
1133         struct ldap_SearchResEntry response;
1134         struct ldap_Result result;
1135         TALLOC_CTX *tmp_ctx = talloc_new(cldap);
1136         DATA_BLOB blob;
1137
1138         status = push_netlogon_samlogon_response(&blob, tmp_ctx,
1139                                                  netlogon);
1140         if (!NT_STATUS_IS_OK(status)) {
1141                 talloc_free(tmp_ctx);
1142                 return status;
1143         }
1144         reply.messageid    = message_id;
1145         reply.dest         = dest;
1146         reply.response     = &response;
1147         reply.result       = &result;
1148
1149         ZERO_STRUCT(result);
1150
1151         response.dn = "";
1152         response.num_attributes = 1;
1153         response.attributes = talloc(tmp_ctx, struct ldb_message_element);
1154         NT_STATUS_HAVE_NO_MEMORY(response.attributes);
1155         response.attributes->name = "netlogon";
1156         response.attributes->num_values = 1;
1157         response.attributes->values = &blob;
1158
1159         status = cldap_reply_send(cldap, &reply);
1160
1161         talloc_free(tmp_ctx);
1162
1163         return status;
1164 }
1165