source/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 2 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, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 */
  24
  25 #include "includes.h"
  26 #include "smbd/service_task.h"
  27 #include "smbd/service.h"
  28 #include "smbd/service_stream.h"
  29 #include "smbd/process_model.h"
  30 #include "lib/events/events.h"
  31 #include "lib/socket/socket.h"
  32 #include "kdc/kdc.h"
  33 #include "system/network.h"
  34 #include "lib/util/dlinklist.h"
  35 #include "lib/messaging/irpc.h"
  36 #include "lib/stream/packet.h"
  37 #include "librpc/gen_ndr/samr.h"
  38 #include "lib/socket/netif.h"
  39 #include "heimdal/kdc/windc_plugin.h"
  40 #include "heimdal/lib/krb5/krb5_locl.h"
  41 #include "heimdal/kdc/kdc_locl.h"
  42
  43
  44 /* Disgusting hack to get a mem_ctx into the hdb plugin, when used as a keytab */
  45 TALLOC_CTX *kdc_mem_ctx;
  46
  47 /* hold all the info needed to send a reply */
  48 struct kdc_reply {
  49         struct kdc_reply *next, *prev;
  50         struct socket_address *dest;
  51         DATA_BLOB packet;
  52 };
  53
  54 typedef BOOL (*kdc_process_fn_t)(struct kdc_server *kdc,
  55                                  TALLOC_CTX *mem_ctx,
  56                                  DATA_BLOB *input,
  57                                  DATA_BLOB *reply,
  58                                  struct socket_address *peer_addr,
  59                                  struct socket_address *my_addr,
  60                                  int datagram);
  61
  62 /* hold information about one kdc socket */
  63 struct kdc_socket {
  64         struct socket_context *sock;
  65         struct kdc_server *kdc;
  66         struct fd_event *fde;
  67
  68         /* a queue of outgoing replies that have been deferred */
  69         struct kdc_reply *send_queue;
  70
  71         kdc_process_fn_t process;
  72 };
  73 /*
  74   state of an open tcp connection
  75 */
  76 struct kdc_tcp_connection {
  77         /* stream connection we belong to */
  78         struct stream_connection *conn;
  79
  80         /* the kdc_server the connection belongs to */
  81         struct kdc_server *kdc;
  82
  83         struct packet_context *packet;
  84
  85         kdc_process_fn_t process;
  86 };
  87
  88 /*
  89   handle fd send events on a KDC socket
  90 */
  91 static void kdc_send_handler(struct kdc_socket *kdc_socket)
  92 {
  93         while (kdc_socket->send_queue) {
  94                 struct kdc_reply *rep = kdc_socket->send_queue;
  95                 NTSTATUS status;
  96                 size_t sendlen;
  97
  98                 status = socket_sendto(kdc_socket->sock, &rep->packet, &sendlen,
  99                                        rep->dest);
 100                 if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
 101                         break;
 102                 }
 103                 if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_BUFFER_SIZE)) {
 104                         /* Replace with a krb err, response to big */
 105                 }
 106
 107                 DLIST_REMOVE(kdc_socket->send_queue, rep);
 108                 talloc_free(rep);
 109         }
 110
 111         if (kdc_socket->send_queue == NULL) {
 112                 EVENT_FD_NOT_WRITEABLE(kdc_socket->fde);
 113         }
 114 }
 115
 116
 117 /*
 118   handle fd recv events on a KDC socket
 119 */
 120 static void kdc_recv_handler(struct kdc_socket *kdc_socket)
 121 {
 122         NTSTATUS status;
 123         TALLOC_CTX *tmp_ctx = talloc_new(kdc_socket);
 124         DATA_BLOB blob;
 125         struct kdc_reply *rep;
 126         DATA_BLOB reply;
 127         size_t nread, dsize;
 128         struct socket_address *src;
 129         struct socket_address *my_addr;
 130         int ret;
 131
 132         status = socket_pending(kdc_socket->sock, &dsize);
 133         if (!NT_STATUS_IS_OK(status)) {
 134                 talloc_free(tmp_ctx);
 135                 return;
 136         }
 137
 138         blob = data_blob_talloc(tmp_ctx, NULL, dsize);
 139         if (blob.data == NULL) {
 140                 /* hope this is a temporary low memory condition */
 141                 talloc_free(tmp_ctx);
 142                 return;
 143         }
 144
 145         status = socket_recvfrom(kdc_socket->sock, blob.data, blob.length, &nread,
 146                                  tmp_ctx, &src);
 147         if (!NT_STATUS_IS_OK(status)) {
 148                 talloc_free(tmp_ctx);
 149                 return;
 150         }
 151         blob.length = nread;
 152
 153         DEBUG(10,("Received krb5 UDP packet of length %lu from %s:%u\n",
 154                  (long)blob.length, src->addr, (uint16_t)src->port));
 155
 156         my_addr = socket_get_my_addr(kdc_socket->sock, tmp_ctx);
 157         if (!my_addr) {
 158                 talloc_free(tmp_ctx);
 159                 return;
 160         }
 161
 162
 163         /* Call krb5 */
 164         ret = kdc_socket->process(kdc_socket->kdc,
 165                                   tmp_ctx,
 166                                   &blob,
 167                                   &reply,
 168                                   src, my_addr,
 169                                   1 /* Datagram */);
 170         if (!ret) {
 171                 talloc_free(tmp_ctx);
 172                 return;
 173         }
 174
 175         /* queue a pending reply */
 176         rep = talloc(kdc_socket, struct kdc_reply);
 177         if (rep == NULL) {
 178                 talloc_free(tmp_ctx);
 179                 return;
 180         }
 181         rep->dest         = talloc_steal(rep, src);
 182         rep->packet       = reply;
 183         talloc_steal(rep, reply.data);
 184
 185         if (rep->packet.data == NULL) {
 186                 talloc_free(rep);
 187                 talloc_free(tmp_ctx);
 188                 return;
 189         }
 190
 191         DLIST_ADD_END(kdc_socket->send_queue, rep, struct kdc_reply *);
 192         EVENT_FD_WRITEABLE(kdc_socket->fde);
 193         talloc_free(tmp_ctx);
 194 }
 195
 196 /*
 197   handle fd events on a KDC socket
 198 */
 199 static void kdc_socket_handler(struct event_context *ev, struct fd_event *fde,
 200                                uint16_t flags, void *private)
 201 {
 202         struct kdc_socket *kdc_socket = talloc_get_type(private, struct kdc_socket);
 203         if (flags & EVENT_FD_WRITE) {
 204                 kdc_send_handler(kdc_socket);
 205         }
 206         if (flags & EVENT_FD_READ) {
 207                 kdc_recv_handler(kdc_socket);
 208         }
 209 }
 210
 211 static void kdc_tcp_terminate_connection(struct kdc_tcp_connection *kdcconn, const char *reason)
 212 {
 213         stream_terminate_connection(kdcconn->conn, reason);
 214 }
 215
 216 /*
 217   receive a full packet on a KDC connection
 218 */
 219 static NTSTATUS kdc_tcp_recv(void *private, DATA_BLOB blob)
 220 {
 221         struct kdc_tcp_connection *kdcconn = talloc_get_type(private,
 222                                                              struct kdc_tcp_connection);
 223         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 224         TALLOC_CTX *tmp_ctx = talloc_new(kdcconn);
 225         int ret;
 226         DATA_BLOB input, reply;
 227         struct socket_address *src_addr;
 228         struct socket_address *my_addr;
 229
 230         talloc_steal(tmp_ctx, blob.data);
 231
 232         src_addr = socket_get_peer_addr(kdcconn->conn->socket, tmp_ctx);
 233         if (!src_addr) {
 234                 talloc_free(tmp_ctx);
 235                 return NT_STATUS_NO_MEMORY;
 236         }
 237
 238         my_addr = socket_get_my_addr(kdcconn->conn->socket, tmp_ctx);
 239         if (!my_addr) {
 240                 talloc_free(tmp_ctx);
 241                 return NT_STATUS_NO_MEMORY;
 242         }
 243
 244         /* Call krb5 */
 245         input = data_blob_const(blob.data + 4, blob.length - 4);
 246
 247         ret = kdcconn->process(kdcconn->kdc,
 248                                tmp_ctx,
 249                                &input,
 250                                &reply,
 251                                src_addr,
 252                                my_addr,
 253                                0 /* Not datagram */);
 254         if (!ret) {
 255                 talloc_free(tmp_ctx);
 256                 return NT_STATUS_INTERNAL_ERROR;
 257         }
 258
 259         /* and now encode the reply */
 260         blob = data_blob_talloc(kdcconn, NULL, reply.length + 4);
 261         if (!blob.data) {
 262                 talloc_free(tmp_ctx);
 263                 return NT_STATUS_NO_MEMORY;
 264         }
 265
 266         RSIVAL(blob.data, 0, reply.length);
 267         memcpy(blob.data + 4, reply.data, reply.length);
 268
 269         status = packet_send(kdcconn->packet, blob);
 270         if (!NT_STATUS_IS_OK(status)) {
 271                 talloc_free(tmp_ctx);
 272                 return status;
 273         }
 274
 275         /* the call isn't needed any more */
 276         talloc_free(tmp_ctx);
 277         return NT_STATUS_OK;
 278 }
 279
 280 /*
 281   receive some data on a KDC connection
 282 */
 283 static void kdc_tcp_recv_handler(struct stream_connection *conn, uint16_t flags)
 284 {
 285         struct kdc_tcp_connection *kdcconn = talloc_get_type(conn->private,
 286                                                              struct kdc_tcp_connection);
 287         packet_recv(kdcconn->packet);
 288 }
 289
 290 /*
 291   called on a tcp recv error
 292 */
 293 static void kdc_tcp_recv_error(void *private, NTSTATUS status)
 294 {
 295         struct kdc_tcp_connection *kdcconn = talloc_get_type(private, struct kdc_tcp_connection);
 296         kdc_tcp_terminate_connection(kdcconn, nt_errstr(status));
 297 }
 298
 299 /*
 300   called when we can write to a connection
 301 */
 302 static void kdc_tcp_send(struct stream_connection *conn, uint16_t flags)
 303 {
 304         struct kdc_tcp_connection *kdcconn = talloc_get_type(conn->private,
 305                                                              struct kdc_tcp_connection);
 306         packet_queue_run(kdcconn->packet);
 307 }
 308
 309 /**
 310    Wrapper for krb5_kdc_process_krb5_request, converting to/from Samba
 311    calling conventions
 312 */
 313
 314 static BOOL kdc_process(struct kdc_server *kdc,
 315                         TALLOC_CTX *mem_ctx,
 316                         DATA_BLOB *input,
 317                         DATA_BLOB *reply,
 318                         struct socket_address *peer_addr,
 319                         struct socket_address *my_addr,
 320                         int datagram_reply)
 321 {
 322         int ret;
 323         krb5_data k5_reply;
 324         krb5_data_zero(&k5_reply);
 325
 326         DEBUG(10,("Received KDC packet of length %lu from %s:%d\n",
 327                   (long)input->length - 4, peer_addr->addr, peer_addr->port));
 328
 329         ret = krb5_kdc_process_krb5_request(kdc->smb_krb5_context->krb5_context,
 330                                             kdc->config,
 331                                             input->data, input->length,
 332                                             &k5_reply,
 333                                             peer_addr->addr,
 334                                             peer_addr->sockaddr,
 335                                             datagram_reply);
 336         if (ret == -1) {
 337                 *reply = data_blob(NULL, 0);
 338                 return False;
 339         }
 340         if (k5_reply.length) {
 341                 *reply = data_blob_talloc(mem_ctx, k5_reply.data, k5_reply.length);
 342                 krb5_free_data_contents(kdc->smb_krb5_context->krb5_context, &k5_reply);
 343         } else {
 344                 *reply = data_blob(NULL, 0);
 345         }
 346         return True;
 347 }
 348
 349 /*
 350   called when we get a new connection
 351 */
 352 static void kdc_tcp_generic_accept(struct stream_connection *conn, kdc_process_fn_t process_fn)
 353 {
 354         struct kdc_server *kdc = talloc_get_type(conn->private, struct kdc_server);
 355         struct kdc_tcp_connection *kdcconn;
 356
 357         kdcconn = talloc_zero(conn, struct kdc_tcp_connection);
 358         if (!kdcconn) {
 359                 stream_terminate_connection(conn, "kdc_tcp_accept: out of memory");
 360                 return;
 361         }
 362         kdcconn->conn    = conn;
 363         kdcconn->kdc     = kdc;
 364         kdcconn->process = process_fn;
 365         conn->private    = kdcconn;
 366
 367         kdcconn->packet = packet_init(kdcconn);
 368         if (kdcconn->packet == NULL) {
 369                 kdc_tcp_terminate_connection(kdcconn, "kdc_tcp_accept: out of memory");
 370                 return;
 371         }
 372         packet_set_private(kdcconn->packet, kdcconn);
 373         packet_set_socket(kdcconn->packet, conn->socket);
 374         packet_set_callback(kdcconn->packet, kdc_tcp_recv);
 375         packet_set_full_request(kdcconn->packet, packet_full_request_u32);
 376         packet_set_error_handler(kdcconn->packet, kdc_tcp_recv_error);
 377         packet_set_event_context(kdcconn->packet, conn->event.ctx);
 378         packet_set_fde(kdcconn->packet, conn->event.fde);
 379         packet_set_serialise(kdcconn->packet);
 380 }
 381
 382 static void kdc_tcp_accept(struct stream_connection *conn)
 383 {
 384         kdc_tcp_generic_accept(conn, kdc_process);
 385 }
 386
 387 static const struct stream_server_ops kdc_tcp_stream_ops = {
 388         .name                   = "kdc_tcp",
 389         .accept_connection      = kdc_tcp_accept,
 390         .recv_handler           = kdc_tcp_recv_handler,
 391         .send_handler           = kdc_tcp_send
 392 };
 393
 394 static void kpasswdd_tcp_accept(struct stream_connection *conn)
 395 {
 396         kdc_tcp_generic_accept(conn, kpasswdd_process);
 397 }
 398
 399 static const struct stream_server_ops kpasswdd_tcp_stream_ops = {
 400         .name                   = "kpasswdd_tcp",
 401         .accept_connection      = kpasswdd_tcp_accept,
 402         .recv_handler           = kdc_tcp_recv_handler,
 403         .send_handler           = kdc_tcp_send
 404 };
 405
 406 /*
 407   start listening on the given address
 408 */
 409 static NTSTATUS kdc_add_socket(struct kdc_server *kdc, const char *address)
 410 {
 411         const struct model_ops *model_ops;
 412         struct kdc_socket *kdc_socket;
 413         struct kdc_socket *kpasswd_socket;
 414         struct socket_address *kdc_address, *kpasswd_address;
 415         NTSTATUS status;
 416         uint16_t kdc_port = lp_krb5_port();
 417         uint16_t kpasswd_port = lp_kpasswd_port();
 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, model_ops,
 492                                      &kdc_tcp_stream_ops,
 493                                      "ip", address, &kdc_port, kdc);
 494         if (!NT_STATUS_IS_OK(status)) {
 495                 DEBUG(0,("Failed to bind to %s:%u TCP - %s\n",
 496                          address, kdc_port, nt_errstr(status)));
 497                 talloc_free(kdc_socket);
 498                 return status;
 499         }
 500
 501         status = stream_setup_socket(kdc->task->event_ctx, model_ops,
 502                                      &kpasswdd_tcp_stream_ops,
 503                                      "ip", address, &kpasswd_port, kdc);
 504         if (!NT_STATUS_IS_OK(status)) {
 505                 DEBUG(0,("Failed to bind to %s:%u TCP - %s\n",
 506                          address, kpasswd_port, nt_errstr(status)));
 507                 talloc_free(kdc_socket);
 508                 return status;
 509         }
 510
 511         return NT_STATUS_OK;
 512 }
 513
 514
 515 /*
 516   setup our listening sockets on the configured network interfaces
 517 */
 518 static NTSTATUS kdc_startup_interfaces(struct kdc_server *kdc)
 519 {
 520         int num_interfaces = iface_count();
 521         TALLOC_CTX *tmp_ctx = talloc_new(kdc);
 522         NTSTATUS status;
 523
 524         int i;
 525
 526         for (i=0; i<num_interfaces; i++) {
 527                 const char *address = talloc_strdup(tmp_ctx, iface_n_ip(i));
 528                 status = kdc_add_socket(kdc, address);
 529                 NT_STATUS_NOT_OK_RETURN(status);
 530         }
 531
 532         talloc_free(tmp_ctx);
 533
 534         return NT_STATUS_OK;
 535 }
 536
 537 static struct krb5plugin_windc_ftable windc_plugin_table = {
 538         .minor_version = KRB5_WINDC_PLUGING_MINOR,
 539         .init = samba_kdc_plugin_init,
 540         .fini = samba_kdc_plugin_fini,
 541         .pac_generate = samba_kdc_get_pac,
 542         .pac_verify = samba_kdc_reget_pac,
 543         .client_access = samba_kdc_check_client_access,
 544 };
 545
 546
 547 /*
 548   startup the kdc task
 549 */
 550 static void kdc_task_init(struct task_server *task)
 551 {
 552         struct kdc_server *kdc;
 553         NTSTATUS status;
 554         krb5_error_code ret;
 555
 556         switch (lp_server_role()) {
 557         case ROLE_STANDALONE:
 558                 task_server_terminate(task, "kdc: no KDC required in standalone configuration");
 559                 return;
 560         case ROLE_DOMAIN_MEMBER:
 561                 task_server_terminate(task, "kdc: no KDC required in member server configuration");
 562                 return;
 563         case ROLE_DOMAIN_CONTROLLER:
 564                 /* Yes, we want a KDC */
 565                 break;
 566         }
 567
 568         if (iface_count() == 0) {
 569                 task_server_terminate(task, "kdc: no network interfaces configured");
 570                 return;
 571         }
 572
 573         task_server_set_title(task, "task[kdc]");
 574
 575         kdc = talloc(task, struct kdc_server);
 576         if (kdc == NULL) {
 577                 task_server_terminate(task, "kdc: out of memory");
 578                 return;
 579         }
 580
 581         kdc->task = task;
 582
 583         initialize_krb5_error_table();
 584
 585         ret = smb_krb5_init_context(kdc, &kdc->smb_krb5_context);
 586         if (ret) {
 587                 DEBUG(1,("kdc_task_init: krb5_init_context failed (%s)\n",
 588                          error_message(ret)));
 589                 task_server_terminate(task, "kdc: krb5_init_context failed");
 590                 return;
 591         }
 592
 593         krb5_add_et_list(kdc->smb_krb5_context->krb5_context, initialize_hdb_error_table_r);
 594
 595         /* Registar WinDC hooks */
 596         ret = _krb5_plugin_register(kdc->smb_krb5_context->krb5_context,
 597                                     PLUGIN_TYPE_DATA, "windc",
 598                                     &windc_plugin_table);
 599         if(ret) {
 600                 task_server_terminate(task, "kdc: failed to register hdb keytab");
 601                 return;
 602         }
 603
 604         /* Setup the KDC configuration */
 605         kdc->config = talloc(kdc, krb5_kdc_configuration);
 606         if (!kdc->config) {
 607                 task_server_terminate(task, "kdc: out of memory");
 608                 return;
 609         }
 610         krb5_kdc_default_config(kdc->config);
 611
 612         kdc->config->logf = kdc->smb_krb5_context->logf;
 613         kdc->config->db = talloc(kdc->config, struct HDB *);
 614         if (!kdc->config->db) {
 615                 task_server_terminate(task, "kdc: out of memory");
 616                 return;
 617         }
 618         kdc->config->num_db = 1;
 619
 620         status = kdc_hdb_ldb_create(kdc, kdc->smb_krb5_context->krb5_context,
 621                                     &kdc->config->db[0], NULL);
 622         if (!NT_STATUS_IS_OK(status)) {
 623                 task_server_terminate(task, "kdc: hdb_ldb_create (setup KDC database) failed");
 624                 return;
 625         }
 626
 627         ret = krb5_kt_register(kdc->smb_krb5_context->krb5_context, &hdb_kt_ops);
 628         if(ret) {
 629                 task_server_terminate(task, "kdc: failed to register hdb keytab");
 630                 return;
 631         }
 632
 633         krb5_kdc_configure(kdc->smb_krb5_context->krb5_context, kdc->config);
 634
 635         kdc_mem_ctx = kdc->smb_krb5_context;
 636
 637         /* start listening on the configured network interfaces */
 638         status = kdc_startup_interfaces(kdc);
 639         if (!NT_STATUS_IS_OK(status)) {
 640                 task_server_terminate(task, "kdc failed to setup interfaces");
 641                 return;
 642         }
 643
 644         irpc_add_name(task->msg_ctx, "kdc_server");
 645 }
 646
 647
 648 /*
 649   called on startup of the KDC service
 650 */
 651 static NTSTATUS kdc_init(struct event_context *event_ctx,
 652                          const struct model_ops *model_ops)
 653 {
 654         return task_server_startup(event_ctx, model_ops, kdc_task_init);
 655 }
 656
 657 /* called at smbd startup - register ourselves as a server service */
 658 NTSTATUS server_service_kdc_init(void)
 659 {
 660         return register_server_service("kdc", kdc_init);
 661 }