source4/kdc/kdc.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    KDC Server startup
   5
   6    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
   7    Copyright (C) Andrew Tridgell        2005
   8    Copyright (C) Stefan Metzmacher      2005
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "smbd/service_task.h"
  26 #include "smbd/service.h"
  27 #include "smbd/service_stream.h"
  28 #include "smbd/process_model.h"
  29 #include "lib/events/events.h"
  30 #include "lib/socket/socket.h"
  31 #include "system/network.h"
  32 #include "lib/util/dlinklist.h"
  33 #include "lib/messaging/irpc.h"
  34 #include "lib/stream/packet.h"
  35 #include "librpc/gen_ndr/samr.h"
  36 #include "lib/socket/netif.h"
  37 #include "param/param.h"
  38 #include "kdc/kdc.h"
  39
  40
  41 /* Disgusting hack to get a mem_ctx and lp_ctx into the hdb plugin, when
  42  * used as a keytab */
  43 TALLOC_CTX *kdc_mem_ctx;
  44 struct loadparm_context *kdc_lp_ctx;
  45
  46 /* hold all the info needed to send a reply */
  47 struct kdc_reply {
  48         struct kdc_reply *next, *prev;
  49         struct socket_address *dest;
  50         DATA_BLOB packet;
  51 };
  52
  53 typedef bool (*kdc_process_fn_t)(struct kdc_server *kdc,
  54                                  TALLOC_CTX *mem_ctx,
  55                                  DATA_BLOB *input,
  56                                  DATA_BLOB *reply,
  57                                  struct socket_address *peer_addr,
  58                                  struct socket_address *my_addr,
  59                                  int datagram);
  60
  61 /* hold information about one kdc socket */
  62 struct kdc_socket {
  63         struct socket_context *sock;
  64         struct kdc_server *kdc;
  65         struct fd_event *fde;
  66
  67         /* a queue of outgoing replies that have been deferred */
  68         struct kdc_reply *send_queue;
  69
  70         kdc_process_fn_t process;
  71 };
  72 /*
  73   state of an open tcp connection
  74 */
  75 struct kdc_tcp_connection {
  76         /* stream connection we belong to */
  77         struct stream_connection *conn;
  78
  79         /* the kdc_server the connection belongs to */
  80         struct kdc_server *kdc;
  81
  82         struct packet_context *packet;
  83
  84         kdc_process_fn_t process;
  85 };
  86
  87 /*
  88   handle fd send events on a KDC socket
  89 */
  90 static void kdc_send_handler(struct kdc_socket *kdc_socket)
  91 {
  92         while (kdc_socket->send_queue) {
  93                 struct kdc_reply *rep = kdc_socket->send_queue;
  94                 NTSTATUS status;
  95                 size_t sendlen;
  96
  97                 status = socket_sendto(kdc_socket->sock, &rep->packet, &sendlen,
  98                                        rep->dest);
  99                 if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
 100                         break;
 101                 }
 102                 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_BUFFER_SIZE)) {
 103                         /* Replace with a krb err, response to big */
 104                 }
 105
 106                 DLIST_REMOVE(kdc_socket->send_queue, rep);
 107                 talloc_free(rep);
 108         }
 109
 110         if (kdc_socket->send_queue == NULL) {
 111                 EVENT_FD_NOT_WRITEABLE(kdc_socket->fde);
 112         }
 113 }
 114
 115
 116 /*
 117   handle fd recv events on a KDC socket
 118 */
 119 static void kdc_recv_handler(struct kdc_socket *kdc_socket)
 120 {
 121         NTSTATUS status;
 122         TALLOC_CTX *tmp_ctx = talloc_new(kdc_socket);
 123         DATA_BLOB blob;
 124         struct kdc_reply *rep;
 125         DATA_BLOB reply;
 126         size_t nread, dsize;
 127         struct socket_address *src;
 128         struct socket_address *my_addr;
 129         int ret;
 130
 131         status = socket_pending(kdc_socket->sock, &dsize);
 132         if (!NT_STATUS_IS_OK(status)) {
 133                 talloc_free(tmp_ctx);
 134                 return;
 135         }
 136
 137         blob = data_blob_talloc(tmp_ctx, NULL, dsize);
 138         if (blob.data == NULL) {
 139                 /* hope this is a temporary low memory condition */
 140                 talloc_free(tmp_ctx);
 141                 return;
 142         }
 143
 144         status = socket_recvfrom(kdc_socket->sock, blob.data, blob.length, &nread,
 145                                  tmp_ctx, &src);
 146         if (!NT_STATUS_IS_OK(status)) {
 147                 talloc_free(tmp_ctx);
 148                 return;
 149         }
 150         blob.length = nread;
 151
 152         DEBUG(10,("Received krb5 UDP packet of length %lu from %s:%u\n",
 153                  (long)blob.length, src->addr, (uint16_t)src->port));
 154
 155         my_addr = socket_get_my_addr(kdc_socket->sock, tmp_ctx);
 156         if (!my_addr) {
 157                 talloc_free(tmp_ctx);
 158                 return;
 159         }
 160
 161
 162         /* Call krb5 */
 163         ret = kdc_socket->process(kdc_socket->kdc,
 164                                   tmp_ctx,
 165                                   &blob,
 166                                   &reply,
 167                                   src, my_addr,
 168                                   1 /* Datagram */);
 169         if (!ret) {
 170                 talloc_free(tmp_ctx);
 171                 return;
 172         }
 173
 174         /* queue a pending reply */
 175         rep = talloc(kdc_socket, struct kdc_reply);
 176         if (rep == NULL) {
 177                 talloc_free(tmp_ctx);
 178                 return;
 179         }
 180         rep->dest         = talloc_steal(rep, src);
 181         rep->packet       = reply;
 182         talloc_steal(rep, reply.data);
 183
 184         if (rep->packet.data == NULL) {
 185                 talloc_free(rep);
 186                 talloc_free(tmp_ctx);
 187                 return;
 188         }
 189
 190         DLIST_ADD_END(kdc_socket->send_queue, rep, struct kdc_reply *);
 191         EVENT_FD_WRITEABLE(kdc_socket->fde);
 192         talloc_free(tmp_ctx);
 193 }
 194
 195 /*
 196   handle fd events on a KDC socket
 197 */
 198 static void kdc_socket_handler(struct event_context *ev, struct fd_event *fde,
 199                                uint16_t flags, void *private)
 200 {
 201         struct kdc_socket *kdc_socket = talloc_get_type(private, struct kdc_socket);
 202         if (flags & EVENT_FD_WRITE) {
 203                 kdc_send_handler(kdc_socket);
 204         }
 205         if (flags & EVENT_FD_READ) {
 206                 kdc_recv_handler(kdc_socket);
 207         }
 208 }
 209
 210 static void kdc_tcp_terminate_connection(struct kdc_tcp_connection *kdcconn, const char *reason)
 211 {
 212         stream_terminate_connection(kdcconn->conn, reason);
 213 }
 214
 215 /*
 216   receive a full packet on a KDC connection
 217 */
 218 static NTSTATUS kdc_tcp_recv(void *private, DATA_BLOB blob)
 219 {
 220         struct kdc_tcp_connection *kdcconn = talloc_get_type(private,
 221                                                              struct kdc_tcp_connection);
 222         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 223         TALLOC_CTX *tmp_ctx = talloc_new(kdcconn);
 224         int ret;
 225         DATA_BLOB input, reply;
 226         struct socket_address *src_addr;
 227         struct socket_address *my_addr;
 228
 229         talloc_steal(tmp_ctx, blob.data);
 230
 231         src_addr = socket_get_peer_addr(kdcconn->conn->socket, tmp_ctx);
 232         if (!src_addr) {
 233                 talloc_free(tmp_ctx);
 234                 return NT_STATUS_NO_MEMORY;
 235         }
 236
 237         my_addr = socket_get_my_addr(kdcconn->conn->socket, tmp_ctx);
 238         if (!my_addr) {
 239                 talloc_free(tmp_ctx);
 240                 return NT_STATUS_NO_MEMORY;
 241         }
 242
 243         /* Call krb5 */
 244         input = data_blob_const(blob.data + 4, blob.length - 4);
 245
 246         ret = kdcconn->process(kdcconn->kdc,
 247                                tmp_ctx,
 248                                &input,
 249                                &reply,
 250                                src_addr,
 251                                my_addr,
 252                                0 /* Not datagram */);
 253         if (!ret) {
 254                 talloc_free(tmp_ctx);
 255                 return NT_STATUS_INTERNAL_ERROR;
 256         }
 257
 258         /* and now encode the reply */
 259         blob = data_blob_talloc(kdcconn, NULL, reply.length + 4);
 260         if (!blob.data) {
 261                 talloc_free(tmp_ctx);
 262                 return NT_STATUS_NO_MEMORY;
 263         }
 264
 265         RSIVAL(blob.data, 0, reply.length);
 266         memcpy(blob.data + 4, reply.data, reply.length);
 267
 268         status = packet_send(kdcconn->packet, blob);
 269         if (!NT_STATUS_IS_OK(status)) {
 270                 talloc_free(tmp_ctx);
 271                 return status;
 272         }
 273
 274         /* the call isn't needed any more */
 275         talloc_free(tmp_ctx);
 276         return NT_STATUS_OK;
 277 }
 278
 279 /*
 280   receive some data on a KDC connection
 281 */
 282 static void kdc_tcp_recv_handler(struct stream_connection *conn, uint16_t flags)
 283 {
 284         struct kdc_tcp_connection *kdcconn = talloc_get_type(conn->private,
 285                                                              struct kdc_tcp_connection);
 286         packet_recv(kdcconn->packet);
 287 }
 288
 289 /*
 290   called on a tcp recv error
 291 */
 292 static void kdc_tcp_recv_error(void *private, NTSTATUS status)
 293 {
 294         struct kdc_tcp_connection *kdcconn = talloc_get_type(private, struct kdc_tcp_connection);
 295         kdc_tcp_terminate_connection(kdcconn, nt_errstr(status));
 296 }
 297
 298 /*
 299   called when we can write to a connection
 300 */
 301 static void kdc_tcp_send(struct stream_connection *conn, uint16_t flags)
 302 {
 303         struct kdc_tcp_connection *kdcconn = talloc_get_type(conn->private,
 304                                                              struct kdc_tcp_connection);
 305         packet_queue_run(kdcconn->packet);
 306 }
 307
 308 /**
 309    Wrapper for krb5_kdc_process_krb5_request, converting to/from Samba
 310    calling conventions
 311 */
 312
 313 static bool kdc_process(struct kdc_server *kdc,
 314                         TALLOC_CTX *mem_ctx,
 315                         DATA_BLOB *input,
 316                         DATA_BLOB *reply,
 317                         struct socket_address *peer_addr,
 318                         struct socket_address *my_addr,
 319                         int datagram_reply)
 320 {
 321         int ret;
 322         krb5_data k5_reply;
 323         krb5_data_zero(&k5_reply);
 324
 325         krb5_kdc_update_time(NULL);
 326
 327         DEBUG(10,("Received KDC packet of length %lu from %s:%d\n",
 328                   (long)input->length - 4, peer_addr->addr, peer_addr->port));
 329
 330         ret = krb5_kdc_process_krb5_request(kdc->smb_krb5_context->krb5_context,
 331                                             kdc->config,
 332                                             input->data, input->length,
 333                                             &k5_reply,
 334                                             peer_addr->addr,
 335                                             peer_addr->sockaddr,
 336                                             datagram_reply);
 337         if (ret == -1) {
 338                 *reply = data_blob(NULL, 0);
 339                 return false;
 340         }
 341         if (k5_reply.length) {
 342                 *reply = data_blob_talloc(mem_ctx, k5_reply.data, k5_reply.length);
 343                 krb5_free_data_contents(kdc->smb_krb5_context->krb5_context, &k5_reply);
 344         } else {
 345                 *reply = data_blob(NULL, 0);
 346         }
 347         return true;
 348 }
 349
 350 /*
 351   called when we get a new connection
 352 */
 353 static void kdc_tcp_generic_accept(struct stream_connection *conn, kdc_process_fn_t process_fn)
 354 {
 355         struct kdc_server *kdc = talloc_get_type(conn->private, struct kdc_server);
 356         struct kdc_tcp_connection *kdcconn;
 357
 358         kdcconn = talloc_zero(conn, struct kdc_tcp_connection);
 359         if (!kdcconn) {
 360                 stream_terminate_connection(conn, "kdc_tcp_accept: out of memory");
 361                 return;
 362         }
 363         kdcconn->conn    = conn;
 364         kdcconn->kdc     = kdc;
 365         kdcconn->process = process_fn;
 366         conn->private    = kdcconn;
 367
 368         kdcconn->packet = packet_init(kdcconn);
 369         if (kdcconn->packet == NULL) {
 370                 kdc_tcp_terminate_connection(kdcconn, "kdc_tcp_accept: out of memory");
 371                 return;
 372         }
 373         packet_set_private(kdcconn->packet, kdcconn);
 374         packet_set_socket(kdcconn->packet, conn->socket);
 375         packet_set_callback(kdcconn->packet, kdc_tcp_recv);
 376         packet_set_full_request(kdcconn->packet, packet_full_request_u32);
 377         packet_set_error_handler(kdcconn->packet, kdc_tcp_recv_error);
 378         packet_set_event_context(kdcconn->packet, conn->event.ctx);
 379         packet_set_fde(kdcconn->packet, conn->event.fde);
 380         packet_set_serialise(kdcconn->packet);
 381 }
 382
 383 static void kdc_tcp_accept(struct stream_connection *conn)
 384 {
 385         kdc_tcp_generic_accept(conn, kdc_process);
 386 }
 387
 388 static const struct stream_server_ops kdc_tcp_stream_ops = {
 389         .name                   = "kdc_tcp",
 390         .accept_connection      = kdc_tcp_accept,
 391         .recv_handler           = kdc_tcp_recv_handler,
 392         .send_handler           = kdc_tcp_send
 393 };
 394
 395 static void kpasswdd_tcp_accept(struct stream_connection *conn)
 396 {
 397         kdc_tcp_generic_accept(conn, kpasswdd_process);
 398 }
 399
 400 static const struct stream_server_ops kpasswdd_tcp_stream_ops = {
 401         .name                   = "kpasswdd_tcp",
 402         .accept_connection      = kpasswdd_tcp_accept,
 403         .recv_handler           = kdc_tcp_recv_handler,
 404         .send_handler           = kdc_tcp_send
 405 };
 406
 407 /*
 408   start listening on the given address
 409 */
 410 static NTSTATUS kdc_add_socket(struct kdc_server *kdc, const char *address,
 411                                uint16_t kdc_port, uint16_t kpasswd_port)
 412 {
 413         const struct model_ops *model_ops;
 414         struct kdc_socket *kdc_socket;
 415         struct kdc_socket *kpasswd_socket;
 416         struct socket_address *kdc_address, *kpasswd_address;
 417         NTSTATUS status;
 418
 419         kdc_socket = talloc(kdc, struct kdc_socket);
 420         NT_STATUS_HAVE_NO_MEMORY(kdc_socket);
 421
 422         kpasswd_socket = talloc(kdc, struct kdc_socket);
 423         NT_STATUS_HAVE_NO_MEMORY(kpasswd_socket);
 424
 425         status = socket_create("ip", SOCKET_TYPE_DGRAM, &kdc_socket->sock, 0);
 426         if (!NT_STATUS_IS_OK(status)) {
 427                 talloc_free(kdc_socket);
 428                 return status;
 429         }
 430
 431         status = socket_create("ip", SOCKET_TYPE_DGRAM, &kpasswd_socket->sock, 0);
 432         if (!NT_STATUS_IS_OK(status)) {
 433                 talloc_free(kpasswd_socket);
 434                 return status;
 435         }
 436
 437         kdc_socket->kdc = kdc;
 438         kdc_socket->send_queue = NULL;
 439         kdc_socket->process = kdc_process;
 440
 441         talloc_steal(kdc_socket, kdc_socket->sock);
 442
 443         kdc_socket->fde = event_add_fd(kdc->task->event_ctx, kdc,
 444                                        socket_get_fd(kdc_socket->sock), EVENT_FD_READ,
 445                                        kdc_socket_handler, kdc_socket);
 446
 447         kdc_address = socket_address_from_strings(kdc_socket, kdc_socket->sock->backend_name,
 448                                                   address, kdc_port);
 449         NT_STATUS_HAVE_NO_MEMORY(kdc_address);
 450
 451         status = socket_listen(kdc_socket->sock, kdc_address, 0, 0);
 452         if (!NT_STATUS_IS_OK(status)) {
 453                 DEBUG(0,("Failed to bind to %s:%d UDP for kdc - %s\n",
 454                          address, kdc_port, nt_errstr(status)));
 455                 talloc_free(kdc_socket);
 456                 return status;
 457         }
 458
 459         kpasswd_socket->kdc = kdc;
 460         kpasswd_socket->send_queue = NULL;
 461         kpasswd_socket->process = kpasswdd_process;
 462
 463         talloc_steal(kpasswd_socket, kpasswd_socket->sock);
 464
 465         kpasswd_socket->fde = event_add_fd(kdc->task->event_ctx, kdc,
 466                                            socket_get_fd(kpasswd_socket->sock), EVENT_FD_READ,
 467                                            kdc_socket_handler, kpasswd_socket);
 468
 469         kpasswd_address = socket_address_from_strings(kpasswd_socket, kpasswd_socket->sock->backend_name,
 470                                                       address, kpasswd_port);
 471         NT_STATUS_HAVE_NO_MEMORY(kpasswd_address);
 472
 473         status = socket_listen(kpasswd_socket->sock, kpasswd_address, 0, 0);
 474         if (!NT_STATUS_IS_OK(status)) {
 475                 DEBUG(0,("Failed to bind to %s:%d UDP for kpasswd - %s\n",
 476                          address, kpasswd_port, nt_errstr(status)));
 477                 talloc_free(kpasswd_socket);
 478                 return status;
 479         }
 480
 481         /* within the kdc task we want to be a single process, so
 482            ask for the single process model ops and pass these to the
 483            stream_setup_socket() call. */
 484         model_ops = process_model_byname("single");
 485         if (!model_ops) {
 486                 DEBUG(0,("Can't find 'single' process model_ops\n"));
 487                 talloc_free(kdc_socket);
 488                 return NT_STATUS_INTERNAL_ERROR;
 489         }
 490
 491         status = stream_setup_socket(kdc->task->event_ctx,
 492                                      kdc->task->lp_ctx,
 493                                      model_ops,
 494                                      &kdc_tcp_stream_ops,
 495                                      "ip", address, &kdc_port,
 496                                      lp_socket_options(kdc->task->lp_ctx),
 497                                      kdc);
 498         if (!NT_STATUS_IS_OK(status)) {
 499                 DEBUG(0,("Failed to bind to %s:%u TCP - %s\n",
 500                          address, kdc_port, nt_errstr(status)));
 501                 talloc_free(kdc_socket);
 502                 return status;
 503         }
 504
 505         status = stream_setup_socket(kdc->task->event_ctx,
 506                                      kdc->task->lp_ctx,
 507                                      model_ops,
 508                                      &kpasswdd_tcp_stream_ops,
 509                                      "ip", address, &kpasswd_port,
 510                                      lp_socket_options(kdc->task->lp_ctx),
 511                                      kdc);
 512         if (!NT_STATUS_IS_OK(status)) {
 513                 DEBUG(0,("Failed to bind to %s:%u TCP - %s\n",
 514                          address, kpasswd_port, nt_errstr(status)));
 515                 talloc_free(kdc_socket);
 516                 return status;
 517         }
 518
 519         return NT_STATUS_OK;
 520 }
 521
 522
 523 /*
 524   setup our listening sockets on the configured network interfaces
 525 */
 526 static NTSTATUS kdc_startup_interfaces(struct kdc_server *kdc, struct loadparm_context *lp_ctx,
 527                                        struct interface *ifaces)
 528 {
 529         int num_interfaces;
 530         TALLOC_CTX *tmp_ctx = talloc_new(kdc);
 531         NTSTATUS status;
 532         int i;
 533
 534         num_interfaces = iface_count(ifaces);
 535
 536         for (i=0; i<num_interfaces; i++) {
 537                 const char *address = talloc_strdup(tmp_ctx, iface_n_ip(ifaces, i));
 538                 status = kdc_add_socket(kdc, address, lp_krb5_port(lp_ctx),
 539                                         lp_kpasswd_port(lp_ctx));
 540                 NT_STATUS_NOT_OK_RETURN(status);
 541         }
 542
 543         talloc_free(tmp_ctx);
 544
 545         return NT_STATUS_OK;
 546 }
 547
 548 static struct krb5plugin_windc_ftable windc_plugin_table = {
 549         .minor_version = KRB5_WINDC_PLUGING_MINOR,
 550         .init = samba_kdc_plugin_init,
 551         .fini = samba_kdc_plugin_fini,
 552         .pac_generate = samba_kdc_get_pac,
 553         .pac_verify = samba_kdc_reget_pac,
 554         .client_access = samba_kdc_check_client_access,
 555 };
 556
 557
 558 /*
 559   startup the kdc task
 560 */
 561 static void kdc_task_init(struct task_server *task)
 562 {
 563         struct kdc_server *kdc;
 564         NTSTATUS status;
 565         krb5_error_code ret;
 566         struct interface *ifaces;
 567
 568         switch (lp_server_role(task->lp_ctx)) {
 569         case ROLE_STANDALONE:
 570                 task_server_terminate(task, "kdc: no KDC required in standalone configuration");
 571                 return;
 572         case ROLE_DOMAIN_MEMBER:
 573                 task_server_terminate(task, "kdc: no KDC required in member server configuration");
 574                 return;
 575         case ROLE_DOMAIN_CONTROLLER:
 576                 /* Yes, we want a KDC */
 577                 break;
 578         }
 579
 580         load_interfaces(task, lp_interfaces(task->lp_ctx), &ifaces);
 581
 582         if (iface_count(ifaces) == 0) {
 583                 task_server_terminate(task, "kdc: no network interfaces configured");
 584                 return;
 585         }
 586
 587         task_server_set_title(task, "task[kdc]");
 588
 589         kdc = talloc(task, struct kdc_server);
 590         if (kdc == NULL) {
 591                 task_server_terminate(task, "kdc: out of memory");
 592                 return;
 593         }
 594
 595         kdc->task = task;
 596
 597         initialize_krb5_error_table();
 598
 599         ret = smb_krb5_init_context(kdc, task->event_ctx, task->lp_ctx, &kdc->smb_krb5_context);
 600         if (ret) {
 601                 DEBUG(1,("kdc_task_init: krb5_init_context failed (%s)\n",
 602                          error_message(ret)));
 603                 task_server_terminate(task, "kdc: krb5_init_context failed");
 604                 return;
 605         }
 606
 607         krb5_add_et_list(kdc->smb_krb5_context->krb5_context, initialize_hdb_error_table_r);
 608
 609         ret = krb5_kdc_get_config(kdc->smb_krb5_context->krb5_context,
 610                                   &kdc->config);
 611         if(ret) {
 612                 task_server_terminate(task, "kdc: failed to get KDC configuration");
 613                 return;
 614         }
 615
 616         kdc->config->logf = kdc->smb_krb5_context->logf;
 617         kdc->config->db = talloc(kdc, struct HDB *);
 618         if (!kdc->config->db) {
 619                 task_server_terminate(task, "kdc: out of memory");
 620                 return;
 621         }
 622         kdc->config->num_db = 1;
 623
 624         status = kdc_hdb_ldb_create(kdc, task->event_ctx, task->lp_ctx,
 625                                     kdc->smb_krb5_context->krb5_context,
 626                                     &kdc->config->db[0], NULL);
 627         if (!NT_STATUS_IS_OK(status)) {
 628                 task_server_terminate(task, "kdc: hdb_ldb_create (setup KDC database) failed");
 629                 return;
 630         }
 631
 632         ret = krb5_kt_register(kdc->smb_krb5_context->krb5_context, &hdb_kt_ops);
 633         if(ret) {
 634                 task_server_terminate(task, "kdc: failed to register hdb keytab");
 635                 return;
 636         }
 637
 638         /* Registar WinDC hooks */
 639         ret = krb5_plugin_register(kdc->smb_krb5_context->krb5_context,
 640                                    PLUGIN_TYPE_DATA, "windc",
 641                                    &windc_plugin_table);
 642         if(ret) {
 643                 task_server_terminate(task, "kdc: failed to register hdb keytab");
 644                 return;
 645         }
 646
 647         krb5_kdc_windc_init(kdc->smb_krb5_context->krb5_context);
 648
 649         kdc_mem_ctx = kdc->smb_krb5_context;
 650         kdc_lp_ctx = task->lp_ctx;
 651
 652         /* start listening on the configured network interfaces */
 653         status = kdc_startup_interfaces(kdc, task->lp_ctx, ifaces);
 654         if (!NT_STATUS_IS_OK(status)) {
 655                 task_server_terminate(task, "kdc failed to setup interfaces");
 656                 return;
 657         }
 658
 659         irpc_add_name(task->msg_ctx, "kdc_server");
 660 }
 661
 662
 663 /* called at smbd startup - register ourselves as a server service */
 664 NTSTATUS server_service_kdc_init(void)
 665 {
 666         return register_server_service("kdc", kdc_task_init);
 667 }