source4/wrepl_server/wrepl_in_call.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    WINS Replication server
   5
   6    Copyright (C) Stefan Metzmacher      2005
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "lib/events/events.h"
  24 #include "lib/tsocket/tsocket.h"
  25 #include "smbd/service_task.h"
  26 #include "smbd/service_stream.h"
  27 #include "libcli/wrepl/winsrepl.h"
  28 #include "wrepl_server/wrepl_server.h"
  29 #include "libcli/composite/composite.h"
  30 #include "nbt_server/wins/winsdb.h"
  31 #include <ldb.h>
  32 #include <ldb_errors.h>
  33 #include "system/time.h"
  34 #include "lib/util/tsort.h"
  35 #include "param/param.h"
  36
  37 static NTSTATUS wreplsrv_in_start_association(struct wreplsrv_in_call *call)
  38 {
  39         struct wrepl_start *start       = &call->req_packet.message.start;
  40         struct wrepl_start *start_reply = &call->rep_packet.message.start_reply;
  41
  42         if (call->req_packet.opcode & WREPL_OPCODE_BITS) {
  43                 /*
  44                  *if the assoc_ctx doesn't match ignore the packet
  45                  */
  46                 if ((call->req_packet.assoc_ctx != call->wreplconn->assoc_ctx.our_ctx)
  47                    && (call->req_packet.assoc_ctx != 0)) {
  48                         return ERROR_INVALID_PARAMETER;
  49                 }
  50         } else {
  51                 call->wreplconn->assoc_ctx.our_ctx = WREPLSRV_INVALID_ASSOC_CTX;
  52                 return NT_STATUS_OK;
  53         }
  54
  55 /*
  56  * it seems that we don't know all details about the start_association
  57  * to support replication with NT4 (it sends 1.1 instead of 5.2)
  58  * we ignore the version numbers until we know all details
  59  */
  60 #if 0
  61         if (start->minor_version != 2 || start->major_version != 5) {
  62                 /* w2k terminate the connection if the versions doesn't match */
  63                 return NT_STATUS_UNKNOWN_REVISION;
  64         }
  65 #endif
  66
  67         call->wreplconn->assoc_ctx.stopped      = false;
  68         call->wreplconn->assoc_ctx.our_ctx      = WREPLSRV_VALID_ASSOC_CTX;
  69         call->wreplconn->assoc_ctx.peer_ctx     = start->assoc_ctx;
  70
  71         call->rep_packet.mess_type              = WREPL_START_ASSOCIATION_REPLY;
  72         start_reply->assoc_ctx                  = call->wreplconn->assoc_ctx.our_ctx;
  73         start_reply->minor_version              = 2;
  74         start_reply->major_version              = 5;
  75
  76         /*
  77          * nt4 uses 41 bytes for the start_association call
  78          * so do it the same and as we don't know the meanings of this bytes
  79          * we just send zeros and nt4, w2k and w2k3 seems to be happy with this
  80          *
  81          * if we don't do this nt4 uses an old version of the wins replication protocol
  82          * and that would break nt4 <-> samba replication
  83          */
  84         call->rep_packet.padding                = data_blob_talloc(call, NULL, 21);
  85         NT_STATUS_HAVE_NO_MEMORY(call->rep_packet.padding.data);
  86
  87         memset(call->rep_packet.padding.data, 0, call->rep_packet.padding.length);
  88
  89         return NT_STATUS_OK;
  90 }
  91
  92 static NTSTATUS wreplsrv_in_stop_assoc_ctx(struct wreplsrv_in_call *call)
  93 {
  94         struct wrepl_stop *stop_out             = &call->rep_packet.message.stop;
  95
  96         call->wreplconn->assoc_ctx.stopped      = true;
  97
  98         call->rep_packet.mess_type              = WREPL_STOP_ASSOCIATION;
  99         stop_out->reason                        = 4;
 100
 101         return NT_STATUS_OK;
 102 }
 103
 104 static NTSTATUS wreplsrv_in_stop_association(struct wreplsrv_in_call *call)
 105 {
 106         /*
 107          * w2k only check the assoc_ctx if the opcode has the 0x00007800 bits are set
 108          */
 109         if (call->req_packet.opcode & WREPL_OPCODE_BITS) {
 110                 /*
 111                  *if the assoc_ctx doesn't match ignore the packet
 112                  */
 113                 if (call->req_packet.assoc_ctx != call->wreplconn->assoc_ctx.our_ctx) {
 114                         return ERROR_INVALID_PARAMETER;
 115                 }
 116                 /* when the opcode bits are set the connection should be directly terminated */
 117                 return NT_STATUS_CONNECTION_RESET;
 118         }
 119
 120         if (call->wreplconn->assoc_ctx.stopped) {
 121                 /* this causes the connection to be directly terminated */
 122                 return NT_STATUS_CONNECTION_RESET;
 123         }
 124
 125         /* this will cause to not receive packets anymore and terminate the connection if the reply is send */
 126         call->terminate_after_send = true;
 127         return wreplsrv_in_stop_assoc_ctx(call);
 128 }
 129
 130 static NTSTATUS wreplsrv_in_table_query(struct wreplsrv_in_call *call)
 131 {
 132         struct wreplsrv_service *service = call->wreplconn->service;
 133         struct wrepl_replication *repl_out = &call->rep_packet.message.replication;
 134         struct wrepl_table *table_out = &call->rep_packet.message.replication.info.table;
 135
 136         repl_out->command = WREPL_REPL_TABLE_REPLY;
 137
 138         return wreplsrv_fill_wrepl_table(service, call, table_out,
 139                                          service->wins_db->local_owner, true);
 140 }
 141
 142 static int wreplsrv_in_sort_wins_name(struct wrepl_wins_name *n1,
 143                                       struct wrepl_wins_name *n2)
 144 {
 145         if (n1->id < n2->id) return -1;
 146         if (n1->id > n2->id) return 1;
 147         return 0;
 148 }
 149
 150 static NTSTATUS wreplsrv_record2wins_name(TALLOC_CTX *mem_ctx,
 151                                           struct wrepl_wins_name *name,
 152                                           struct winsdb_record *rec)
 153 {
 154         uint32_t num_ips, i;
 155         struct wrepl_ip *ips;
 156
 157         name->name              = rec->name;
 158         talloc_steal(mem_ctx, rec->name);
 159
 160         name->id                = rec->version;
 161         name->unknown           = "255.255.255.255";
 162
 163         name->flags             = WREPL_NAME_FLAGS(rec->type, rec->state, rec->node, rec->is_static);
 164
 165         switch (name->flags & 2) {
 166         case 0:
 167                 name->addresses.ip                      = rec->addresses[0]->address;
 168                 talloc_steal(mem_ctx, rec->addresses[0]->address);
 169                 break;
 170         case 2:
 171                 num_ips = winsdb_addr_list_length(rec->addresses);
 172                 ips     = talloc_array(mem_ctx, struct wrepl_ip, num_ips);
 173                 NT_STATUS_HAVE_NO_MEMORY(ips);
 174
 175                 for (i = 0; i < num_ips; i++) {
 176                         ips[i].owner    = rec->addresses[i]->wins_owner;
 177                         talloc_steal(ips, rec->addresses[i]->wins_owner);
 178                         ips[i].ip       = rec->addresses[i]->address;
 179                         talloc_steal(ips, rec->addresses[i]->address);
 180                 }
 181
 182                 name->addresses.addresses.num_ips       = num_ips;
 183                 name->addresses.addresses.ips           = ips;
 184                 break;
 185         }
 186
 187         return NT_STATUS_OK;
 188 }
 189
 190 static NTSTATUS wreplsrv_in_send_request(struct wreplsrv_in_call *call)
 191 {
 192         struct wreplsrv_service *service = call->wreplconn->service;
 193         struct wrepl_wins_owner *owner_in = &call->req_packet.message.replication.info.owner;
 194         struct wrepl_replication *repl_out = &call->rep_packet.message.replication;
 195         struct wrepl_send_reply *reply_out = &call->rep_packet.message.replication.info.reply;
 196         struct wreplsrv_owner *owner;
 197         const char *owner_filter;
 198         const char *filter;
 199         struct ldb_result *res = NULL;
 200         int ret;
 201         struct wrepl_wins_name *names;
 202         struct winsdb_record *rec;
 203         NTSTATUS status;
 204         unsigned int i, j;
 205         time_t now = time(NULL);
 206
 207         owner = wreplsrv_find_owner(service, service->table, owner_in->address);
 208
 209         repl_out->command       = WREPL_REPL_SEND_REPLY;
 210         reply_out->num_names    = 0;
 211         reply_out->names        = NULL;
 212
 213         /*
 214          * if we didn't know this owner, must be a bug in the partners client code...
 215          * return an empty list.
 216          */
 217         if (!owner) {
 218                 DEBUG(2,("WINSREPL:reply [0] records unknown owner[%s] to partner[%s]\n",
 219                         owner_in->address, call->wreplconn->partner->address));
 220                 return NT_STATUS_OK;
 221         }
 222
 223         /*
 224          * the client sends a max_version of 0, interpret it as
 225          * (uint64_t)-1
 226          */
 227         if (owner_in->max_version == 0) {
 228                 owner_in->max_version = (uint64_t)-1;
 229         }
 230
 231         /*
 232          * if the partner ask for nothing, or give invalid ranges,
 233          * return an empty list.
 234          */
 235         if (owner_in->min_version > owner_in->max_version) {
 236                 DEBUG(2,("WINSREPL:reply [0] records owner[%s] min[%llu] max[%llu] to partner[%s]\n",
 237                         owner_in->address,
 238                         (long long)owner_in->min_version,
 239                         (long long)owner_in->max_version,
 240                         call->wreplconn->partner->address));
 241                 return NT_STATUS_OK;
 242         }
 243
 244         /*
 245          * if the partner has already all records for nothing, or give invalid ranges,
 246          * return an empty list.
 247          */
 248         if (owner_in->min_version > owner->owner.max_version) {
 249                 DEBUG(2,("WINSREPL:reply [0] records owner[%s] min[%llu] max[%llu] to partner[%s]\n",
 250                         owner_in->address,
 251                         (long long)owner_in->min_version,
 252                         (long long)owner_in->max_version,
 253                         call->wreplconn->partner->address));
 254                 return NT_STATUS_OK;
 255         }
 256
 257         owner_filter = wreplsrv_owner_filter(service, call, owner->owner.address);
 258         NT_STATUS_HAVE_NO_MEMORY(owner_filter);
 259         filter = talloc_asprintf(call,
 260                                  "(&%s(objectClass=winsRecord)"
 261                                  "(|(recordState=%u)(recordState=%u))"
 262                                  "(versionID>=%llu)(versionID<=%llu))",
 263                                  owner_filter,
 264                                  WREPL_STATE_ACTIVE, WREPL_STATE_TOMBSTONE,
 265                                  (long long)owner_in->min_version,
 266                                  (long long)owner_in->max_version);
 267         NT_STATUS_HAVE_NO_MEMORY(filter);
 268         ret = ldb_search(service->wins_db->ldb, call, &res, NULL, LDB_SCOPE_SUBTREE, NULL, "%s", filter);
 269         if (ret != LDB_SUCCESS) return NT_STATUS_INTERNAL_DB_CORRUPTION;
 270         DEBUG(10,("WINSREPL: filter '%s' count %d\n", filter, res->count));
 271
 272         if (res->count == 0) {
 273                 DEBUG(2,("WINSREPL:reply [%u] records owner[%s] min[%llu] max[%llu] to partner[%s]\n",
 274                         res->count, owner_in->address,
 275                         (long long)owner_in->min_version,
 276                         (long long)owner_in->max_version,
 277                         call->wreplconn->partner->address));
 278                 return NT_STATUS_OK;
 279         }
 280
 281         names = talloc_array(call, struct wrepl_wins_name, res->count);
 282         NT_STATUS_HAVE_NO_MEMORY(names);
 283
 284         for (i=0, j=0; i < res->count; i++) {
 285                 status = winsdb_record(service->wins_db, res->msgs[i], call, now, &rec);
 286                 NT_STATUS_NOT_OK_RETURN(status);
 287
 288                 /*
 289                  * it's possible that winsdb_record() made the record RELEASED
 290                  * because it's expired, but in the database it's still stored
 291                  * as ACTIVE...
 292                  *
 293                  * make sure we really only replicate ACTIVE and TOMBSTONE records
 294                  */
 295                 if (rec->state == WREPL_STATE_ACTIVE || rec->state == WREPL_STATE_TOMBSTONE) {
 296                         status = wreplsrv_record2wins_name(names, &names[j], rec);
 297                         NT_STATUS_NOT_OK_RETURN(status);
 298                         j++;
 299                 }
 300
 301                 talloc_free(rec);
 302                 talloc_free(res->msgs[i]);
 303         }
 304
 305         /* sort the names before we send them */
 306         TYPESAFE_QSORT(names, j, wreplsrv_in_sort_wins_name);
 307
 308         DEBUG(2,("WINSREPL:reply [%u] records owner[%s] min[%llu] max[%llu] to partner[%s]\n",
 309                 j, owner_in->address,
 310                 (long long)owner_in->min_version,
 311                 (long long)owner_in->max_version,
 312                 call->wreplconn->partner->address));
 313
 314         reply_out->num_names    = j;
 315         reply_out->names        = names;
 316
 317         return NT_STATUS_OK;
 318 }
 319
 320 struct wreplsrv_in_update_state {
 321         struct wreplsrv_in_connection *wrepl_in;
 322         struct wreplsrv_out_connection *wrepl_out;
 323         struct composite_context *creq;
 324         struct wreplsrv_pull_cycle_io cycle_io;
 325 };
 326
 327 static void wreplsrv_in_update_handler(struct composite_context *creq)
 328 {
 329         struct wreplsrv_in_update_state *update_state = talloc_get_type(creq->async.private_data,
 330                                                         struct wreplsrv_in_update_state);
 331         NTSTATUS status;
 332
 333         status = wreplsrv_pull_cycle_recv(creq);
 334
 335         talloc_free(update_state->wrepl_out);
 336
 337         wreplsrv_terminate_in_connection(update_state->wrepl_in, nt_errstr(status));
 338 }
 339
 340 static NTSTATUS wreplsrv_in_update(struct wreplsrv_in_call *call)
 341 {
 342         struct wreplsrv_in_connection *wrepl_in = call->wreplconn;
 343         struct wreplsrv_out_connection *wrepl_out;
 344         struct wrepl_table *update_in = &call->req_packet.message.replication.info.table;
 345         struct wreplsrv_in_update_state *update_state;
 346         NTSTATUS status;
 347
 348         DEBUG(2,("WREPL_REPL_UPDATE: partner[%s] initiator[%s] num_owners[%u]\n",
 349                 call->wreplconn->partner->address,
 350                 update_in->initiator, update_in->partner_count));
 351
 352         update_state = talloc(wrepl_in, struct wreplsrv_in_update_state);
 353         NT_STATUS_HAVE_NO_MEMORY(update_state);
 354
 355         wrepl_out = talloc(update_state, struct wreplsrv_out_connection);
 356         NT_STATUS_HAVE_NO_MEMORY(wrepl_out);
 357         wrepl_out->service              = wrepl_in->service;
 358         wrepl_out->partner              = wrepl_in->partner;
 359         wrepl_out->assoc_ctx.our_ctx    = wrepl_in->assoc_ctx.our_ctx;
 360         wrepl_out->assoc_ctx.peer_ctx   = wrepl_in->assoc_ctx.peer_ctx;
 361         wrepl_out->sock                 = wrepl_socket_init(wrepl_out,
 362                                                             wrepl_in->conn->event.ctx);
 363
 364         NT_STATUS_HAVE_NO_MEMORY_AND_FREE(wrepl_out->sock, update_state);
 365
 366         TALLOC_FREE(wrepl_in->send_queue);
 367
 368         status = wrepl_socket_donate_stream(wrepl_out->sock, &wrepl_in->tstream);
 369         NT_STATUS_NOT_OK_RETURN_AND_FREE(status, update_state);
 370
 371         update_state->wrepl_in                  = wrepl_in;
 372         update_state->wrepl_out                 = wrepl_out;
 373         update_state->cycle_io.in.partner       = wrepl_out->partner;
 374         update_state->cycle_io.in.num_owners    = update_in->partner_count;
 375         update_state->cycle_io.in.owners        = update_in->partners;
 376         talloc_steal(update_state, update_in->partners);
 377         update_state->cycle_io.in.wreplconn     = wrepl_out;
 378         update_state->creq = wreplsrv_pull_cycle_send(update_state, &update_state->cycle_io);
 379         if (!update_state->creq) {
 380                 talloc_free(update_state);
 381                 return NT_STATUS_INTERNAL_ERROR;
 382         }
 383
 384         update_state->creq->async.fn            = wreplsrv_in_update_handler;
 385         update_state->creq->async.private_data  = update_state;
 386
 387         return ERROR_INVALID_PARAMETER;
 388 }
 389
 390 static NTSTATUS wreplsrv_in_update2(struct wreplsrv_in_call *call)
 391 {
 392         return wreplsrv_in_update(call);
 393 }
 394
 395 static NTSTATUS wreplsrv_in_inform(struct wreplsrv_in_call *call)
 396 {
 397         struct wrepl_table *inform_in = &call->req_packet.message.replication.info.table;
 398
 399         DEBUG(2,("WREPL_REPL_INFORM: partner[%s] initiator[%s] num_owners[%u]\n",
 400                 call->wreplconn->partner->address,
 401                 inform_in->initiator, inform_in->partner_count));
 402
 403         wreplsrv_out_partner_pull(call->wreplconn->partner, inform_in);
 404
 405         /* we don't reply to WREPL_REPL_INFORM messages */
 406         return ERROR_INVALID_PARAMETER;
 407 }
 408
 409 static NTSTATUS wreplsrv_in_inform2(struct wreplsrv_in_call *call)
 410 {
 411         return wreplsrv_in_inform(call);
 412 }
 413
 414 static NTSTATUS wreplsrv_in_replication(struct wreplsrv_in_call *call)
 415 {
 416         struct wrepl_replication *repl_in = &call->req_packet.message.replication;
 417         NTSTATUS status;
 418
 419         /*
 420          * w2k only check the assoc_ctx if the opcode has the 0x00007800 bits are set
 421          */
 422         if (call->req_packet.opcode & WREPL_OPCODE_BITS) {
 423                 /*
 424                  *if the assoc_ctx doesn't match ignore the packet
 425                  */
 426                 if (call->req_packet.assoc_ctx != call->wreplconn->assoc_ctx.our_ctx) {
 427                         return ERROR_INVALID_PARAMETER;
 428                 }
 429         }
 430
 431         if (!call->wreplconn->partner) {
 432                 struct tsocket_address *peer_addr = call->wreplconn->conn->remote_address;
 433                 char *peer_ip;
 434
 435                 if (!tsocket_address_is_inet(peer_addr, "ipv4")) {
 436                         DEBUG(0,("wreplsrv_in_replication: non ipv4 peer addr '%s'\n",
 437                                 tsocket_address_string(peer_addr, call)));
 438                         return NT_STATUS_INTERNAL_ERROR;
 439                 }
 440
 441                 peer_ip = tsocket_address_inet_addr_string(peer_addr, call);
 442                 if (peer_ip == NULL) {
 443                         return NT_STATUS_NO_MEMORY;
 444                 }
 445
 446                 call->wreplconn->partner = wreplsrv_find_partner(call->wreplconn->service, peer_ip);
 447                 if (!call->wreplconn->partner) {
 448                         DEBUG(1,("Failing WINS replication from non-partner %s\n", peer_ip));
 449                         return wreplsrv_in_stop_assoc_ctx(call);
 450                 }
 451         }
 452
 453         switch (repl_in->command) {
 454                 case WREPL_REPL_TABLE_QUERY:
 455                         if (!(call->wreplconn->partner->type & WINSREPL_PARTNER_PUSH)) {
 456                                 DEBUG(0,("Failing WINS replication TABLE_QUERY from non-push-partner %s\n",
 457                                          call->wreplconn->partner->address));
 458                                 return wreplsrv_in_stop_assoc_ctx(call);
 459                         }
 460                         status = wreplsrv_in_table_query(call);
 461                         break;
 462
 463                 case WREPL_REPL_TABLE_REPLY:
 464                         return ERROR_INVALID_PARAMETER;
 465
 466                 case WREPL_REPL_SEND_REQUEST:
 467                         if (!(call->wreplconn->partner->type & WINSREPL_PARTNER_PUSH)) {
 468                                 DEBUG(0,("Failing WINS replication SEND_REQUESET from non-push-partner %s\n",
 469                                          call->wreplconn->partner->address));
 470                                 return wreplsrv_in_stop_assoc_ctx(call);
 471                         }
 472                         status = wreplsrv_in_send_request(call);
 473                         break;
 474
 475                 case WREPL_REPL_SEND_REPLY:
 476                         return ERROR_INVALID_PARAMETER;
 477
 478                 case WREPL_REPL_UPDATE:
 479                         if (!(call->wreplconn->partner->type & WINSREPL_PARTNER_PULL)) {
 480                                 DEBUG(0,("Failing WINS replication UPDATE from non-pull-partner %s\n",
 481                                          call->wreplconn->partner->address));
 482                                 return wreplsrv_in_stop_assoc_ctx(call);
 483                         }
 484                         status = wreplsrv_in_update(call);
 485                         break;
 486
 487                 case WREPL_REPL_UPDATE2:
 488                         if (!(call->wreplconn->partner->type & WINSREPL_PARTNER_PULL)) {
 489                                 DEBUG(0,("Failing WINS replication UPDATE2 from non-pull-partner %s\n",
 490                                          call->wreplconn->partner->address));
 491                                 return wreplsrv_in_stop_assoc_ctx(call);
 492                         }
 493                         status = wreplsrv_in_update2(call);
 494                         break;
 495
 496                 case WREPL_REPL_INFORM:
 497                         if (!(call->wreplconn->partner->type & WINSREPL_PARTNER_PULL)) {
 498                                 DEBUG(0,("Failing WINS replication INFORM from non-pull-partner %s\n",
 499                                          call->wreplconn->partner->address));
 500                                 return wreplsrv_in_stop_assoc_ctx(call);
 501                         }
 502                         status = wreplsrv_in_inform(call);
 503                         break;
 504
 505                 case WREPL_REPL_INFORM2:
 506                         if (!(call->wreplconn->partner->type & WINSREPL_PARTNER_PULL)) {
 507                                 DEBUG(0,("Failing WINS replication INFORM2 from non-pull-partner %s\n",
 508                                          call->wreplconn->partner->address));
 509                                 return wreplsrv_in_stop_assoc_ctx(call);
 510                         }
 511                         status = wreplsrv_in_inform2(call);
 512                         break;
 513
 514                 default:
 515                         return ERROR_INVALID_PARAMETER;
 516         }
 517
 518         if (NT_STATUS_IS_OK(status)) {
 519                 call->rep_packet.mess_type = WREPL_REPLICATION;
 520         }
 521
 522         return status;
 523 }
 524
 525 static NTSTATUS wreplsrv_in_invalid_assoc_ctx(struct wreplsrv_in_call *call)
 526 {
 527         struct wrepl_start *start       = &call->rep_packet.message.start;
 528
 529         call->rep_packet.opcode         = 0x00008583;
 530         call->rep_packet.assoc_ctx      = 0;
 531         call->rep_packet.mess_type      = WREPL_START_ASSOCIATION;
 532
 533         start->assoc_ctx                = 0x0000000a;
 534         start->minor_version            = 0x0001;
 535         start->major_version            = 0x0000;
 536
 537         call->rep_packet.padding        = data_blob_talloc(call, NULL, 4);
 538         memset(call->rep_packet.padding.data, '\0', call->rep_packet.padding.length);
 539
 540         return NT_STATUS_OK;
 541 }
 542
 543 NTSTATUS wreplsrv_in_call(struct wreplsrv_in_call *call)
 544 {
 545         NTSTATUS status;
 546
 547         if (!(call->req_packet.opcode & WREPL_OPCODE_BITS)
 548             && (call->wreplconn->assoc_ctx.our_ctx == WREPLSRV_INVALID_ASSOC_CTX)) {
 549                 return wreplsrv_in_invalid_assoc_ctx(call);
 550         }
 551
 552         switch (call->req_packet.mess_type) {
 553                 case WREPL_START_ASSOCIATION:
 554                         status = wreplsrv_in_start_association(call);
 555                         break;
 556                 case WREPL_START_ASSOCIATION_REPLY:
 557                         /* this is not valid here, so we ignore it */
 558                         return ERROR_INVALID_PARAMETER;
 559
 560                 case WREPL_STOP_ASSOCIATION:
 561                         status = wreplsrv_in_stop_association(call);
 562                         break;
 563
 564                 case WREPL_REPLICATION:
 565                         status = wreplsrv_in_replication(call);
 566                         break;
 567                 default:
 568                         /* everythingelse is also not valid here, so we ignore it */
 569                         return ERROR_INVALID_PARAMETER;
 570         }
 571
 572         if (call->wreplconn->assoc_ctx.our_ctx == WREPLSRV_INVALID_ASSOC_CTX) {
 573                 return wreplsrv_in_invalid_assoc_ctx(call);
 574         }
 575
 576         if (NT_STATUS_IS_OK(status)) {
 577                 /* let the backend to set some of the opcode bits, but always add the standards */
 578                 call->rep_packet.opcode         |= WREPL_OPCODE_BITS;
 579                 call->rep_packet.assoc_ctx      = call->wreplconn->assoc_ctx.peer_ctx;
 580         }
 581
 582         return status;
 583 }