source4/wrepl_server/wrepl_out_helpers.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 2 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, write to the Free Software
  20    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21 */
  22
  23 #include "includes.h"
  24 #include "lib/events/events.h"
  25 #include "lib/socket/socket.h"
  26 #include "smbd/service_task.h"
  27 #include "smbd/service_stream.h"
  28 #include "librpc/gen_ndr/ndr_winsrepl.h"
  29 #include "wrepl_server/wrepl_server.h"
  30 #include "wrepl_server/wrepl_out_helpers.h"
  31 #include "libcli/composite/composite.h"
  32 #include "libcli/wrepl/winsrepl.h"
  33
  34 enum wreplsrv_out_connect_stage {
  35         WREPLSRV_OUT_CONNECT_STAGE_WAIT_SOCKET,
  36         WREPLSRV_OUT_CONNECT_STAGE_WAIT_ASSOC_CTX,
  37         WREPLSRV_OUT_CONNECT_STAGE_DONE
  38 };
  39
  40 struct wreplsrv_out_connect_state {
  41         enum wreplsrv_out_connect_stage stage;
  42         struct composite_context *c;
  43         struct wrepl_request *req;
  44         struct composite_context *c_req;
  45         struct wrepl_associate assoc_io;
  46         enum winsrepl_partner_type type;
  47         struct wreplsrv_out_connection *wreplconn;
  48 };
  49
  50 static void wreplsrv_out_connect_handler_creq(struct composite_context *c_req);
  51 static void wreplsrv_out_connect_handler_req(struct wrepl_request *req);
  52
  53 static NTSTATUS wreplsrv_out_connect_wait_socket(struct wreplsrv_out_connect_state *state)
  54 {
  55         NTSTATUS status;
  56
  57         status = wrepl_connect_recv(state->c_req);
  58         NT_STATUS_NOT_OK_RETURN(status);
  59
  60         state->req = wrepl_associate_send(state->wreplconn->sock, &state->assoc_io);
  61         NT_STATUS_HAVE_NO_MEMORY(state->req);
  62
  63         state->req->async.fn            = wreplsrv_out_connect_handler_req;
  64         state->req->async.private       = state;
  65
  66         state->stage = WREPLSRV_OUT_CONNECT_STAGE_WAIT_ASSOC_CTX;
  67
  68         return NT_STATUS_OK;
  69 }
  70
  71 static NTSTATUS wreplsrv_out_connect_wait_assoc_ctx(struct wreplsrv_out_connect_state *state)
  72 {
  73         NTSTATUS status;
  74
  75         status = wrepl_associate_recv(state->req, &state->assoc_io);
  76         NT_STATUS_NOT_OK_RETURN(status);
  77
  78         state->wreplconn->assoc_ctx.peer_ctx = state->assoc_io.out.assoc_ctx;
  79
  80         if (state->type == WINSREPL_PARTNER_PUSH) {
  81                 state->wreplconn->partner->push.wreplconn = state->wreplconn;
  82                 talloc_steal(state->wreplconn->partner, state->wreplconn);
  83         } else if (state->type == WINSREPL_PARTNER_PULL) {
  84                 state->wreplconn->partner->pull.wreplconn = state->wreplconn;
  85                 talloc_steal(state->wreplconn->partner, state->wreplconn);
  86         }
  87
  88         state->stage = WREPLSRV_OUT_CONNECT_STAGE_DONE;
  89
  90         return NT_STATUS_OK;
  91 }
  92
  93 static void wreplsrv_out_connect_handler(struct wreplsrv_out_connect_state *state)
  94 {
  95         struct composite_context *c = state->c;
  96
  97         switch (state->stage) {
  98         case WREPLSRV_OUT_CONNECT_STAGE_WAIT_SOCKET:
  99                 c->status = wreplsrv_out_connect_wait_socket(state);
 100                 break;
 101         case WREPLSRV_OUT_CONNECT_STAGE_WAIT_ASSOC_CTX:
 102                 c->status = wreplsrv_out_connect_wait_assoc_ctx(state);
 103                 c->state  = COMPOSITE_STATE_DONE;
 104                 break;
 105         case WREPLSRV_OUT_CONNECT_STAGE_DONE:
 106                 c->status = NT_STATUS_INTERNAL_ERROR;
 107         }
 108
 109         if (!NT_STATUS_IS_OK(c->status)) {
 110                 c->state = COMPOSITE_STATE_ERROR;
 111         }
 112
 113         if (c->state >= COMPOSITE_STATE_DONE && c->async.fn) {
 114                 c->async.fn(c);
 115         }
 116 }
 117
 118 static void wreplsrv_out_connect_handler_creq(struct composite_context *creq)
 119 {
 120         struct wreplsrv_out_connect_state *state = talloc_get_type(creq->async.private_data,
 121                                                    struct wreplsrv_out_connect_state);
 122         wreplsrv_out_connect_handler(state);
 123         return;
 124 }
 125
 126 static void wreplsrv_out_connect_handler_req(struct wrepl_request *req)
 127 {
 128         struct wreplsrv_out_connect_state *state = talloc_get_type(req->async.private,
 129                                                    struct wreplsrv_out_connect_state);
 130         wreplsrv_out_connect_handler(state);
 131         return;
 132 }
 133
 134 static struct composite_context *wreplsrv_out_connect_send(struct wreplsrv_partner *partner,
 135                                                            enum winsrepl_partner_type type,
 136                                                            struct wreplsrv_out_connection *wreplconn)
 137 {
 138         struct composite_context *c = NULL;
 139         struct wreplsrv_service *service = partner->service;
 140         struct wreplsrv_out_connect_state *state = NULL;
 141         struct wreplsrv_out_connection **wreplconnp = &wreplconn;
 142         BOOL cached_connection = False;
 143
 144         c = talloc_zero(partner, struct composite_context);
 145         if (!c) goto failed;
 146
 147         state = talloc_zero(c, struct wreplsrv_out_connect_state);
 148         if (!state) goto failed;
 149         state->c        = c;
 150         state->type     = type;
 151
 152         c->state        = COMPOSITE_STATE_IN_PROGRESS;
 153         c->event_ctx    = service->task->event_ctx;
 154         c->private_data = state;
 155
 156         if (type == WINSREPL_PARTNER_PUSH) {
 157                 cached_connection       = True;
 158                 wreplconn               = partner->push.wreplconn;
 159                 wreplconnp              = &partner->push.wreplconn;
 160         } else if (type == WINSREPL_PARTNER_PULL) {
 161                 cached_connection       = True;
 162                 wreplconn               = partner->pull.wreplconn;
 163                 wreplconnp              = &partner->pull.wreplconn;
 164         }
 165
 166         /* we have a connection already, so use it */
 167         if (wreplconn) {
 168                 if (!wreplconn->sock->dead) {
 169                         state->stage    = WREPLSRV_OUT_CONNECT_STAGE_DONE;
 170                         state->wreplconn= wreplconn;
 171                         composite_done(c);
 172                         return c;
 173                 } else if (!cached_connection) {
 174                         state->stage    = WREPLSRV_OUT_CONNECT_STAGE_DONE;
 175                         state->wreplconn= NULL;
 176                         composite_done(c);
 177                         return c;
 178                 } else {
 179                         talloc_free(wreplconn);
 180                         *wreplconnp = NULL;
 181                 }
 182         }
 183
 184         wreplconn = talloc_zero(state, struct wreplsrv_out_connection);
 185         if (!wreplconn) goto failed;
 186
 187         wreplconn->service      = service;
 188         wreplconn->partner      = partner;
 189         wreplconn->sock         = wrepl_socket_init(wreplconn, service->task->event_ctx);
 190         if (!wreplconn->sock) goto failed;
 191
 192         state->stage    = WREPLSRV_OUT_CONNECT_STAGE_WAIT_SOCKET;
 193         state->wreplconn= wreplconn;
 194         state->c_req    = wrepl_connect_send(wreplconn->sock,
 195                                              partner->our_address,
 196                                              partner->address);
 197         if (!state->c_req) goto failed;
 198
 199         state->c_req->async.fn                  = wreplsrv_out_connect_handler_creq;
 200         state->c_req->async.private_data        = state;
 201
 202         return c;
 203 failed:
 204         talloc_free(c);
 205         return NULL;
 206 }
 207
 208 static NTSTATUS wreplsrv_out_connect_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
 209                                           struct wreplsrv_out_connection **wreplconn)
 210 {
 211         NTSTATUS status;
 212
 213         status = composite_wait(c);
 214
 215         if (NT_STATUS_IS_OK(status)) {
 216                 struct wreplsrv_out_connect_state *state = talloc_get_type(c->private_data,
 217                                                            struct wreplsrv_out_connect_state);
 218                 if (state->wreplconn) {
 219                         *wreplconn = talloc_reference(mem_ctx, state->wreplconn);
 220                         if (!*wreplconn) status = NT_STATUS_NO_MEMORY;
 221                 } else {
 222                         status = NT_STATUS_INVALID_CONNECTION;
 223                 }
 224         }
 225
 226         talloc_free(c);
 227         return status;
 228
 229 }
 230
 231 enum wreplsrv_pull_table_stage {
 232         WREPLSRV_PULL_TABLE_STAGE_WAIT_CONNECTION,
 233         WREPLSRV_PULL_TABLE_STAGE_WAIT_TABLE_REPLY,
 234         WREPLSRV_PULL_TABLE_STAGE_DONE
 235 };
 236
 237 struct wreplsrv_pull_table_state {
 238         enum wreplsrv_pull_table_stage stage;
 239         struct composite_context *c;
 240         struct wrepl_request *req;
 241         struct wrepl_pull_table table_io;
 242         struct wreplsrv_pull_table_io *io;
 243         struct composite_context *creq;
 244         struct wreplsrv_out_connection *wreplconn;
 245 };
 246
 247 static void wreplsrv_pull_table_handler_req(struct wrepl_request *req);
 248
 249 static NTSTATUS wreplsrv_pull_table_wait_connection(struct wreplsrv_pull_table_state *state)
 250 {
 251         NTSTATUS status;
 252
 253         status = wreplsrv_out_connect_recv(state->creq, state, &state->wreplconn);
 254         NT_STATUS_NOT_OK_RETURN(status);
 255
 256         state->table_io.in.assoc_ctx = state->wreplconn->assoc_ctx.peer_ctx;
 257         state->req = wrepl_pull_table_send(state->wreplconn->sock, &state->table_io);
 258         NT_STATUS_HAVE_NO_MEMORY(state->req);
 259
 260         state->req->async.fn            = wreplsrv_pull_table_handler_req;
 261         state->req->async.private       = state;
 262
 263         state->stage = WREPLSRV_PULL_TABLE_STAGE_WAIT_TABLE_REPLY;
 264
 265         return NT_STATUS_OK;
 266 }
 267
 268 static NTSTATUS wreplsrv_pull_table_wait_table_reply(struct wreplsrv_pull_table_state *state)
 269 {
 270         NTSTATUS status;
 271
 272         status = wrepl_pull_table_recv(state->req, state, &state->table_io);
 273         NT_STATUS_NOT_OK_RETURN(status);
 274
 275         state->stage = WREPLSRV_PULL_TABLE_STAGE_DONE;
 276
 277         return NT_STATUS_OK;
 278 }
 279
 280 static void wreplsrv_pull_table_handler(struct wreplsrv_pull_table_state *state)
 281 {
 282         struct composite_context *c = state->c;
 283
 284         switch (state->stage) {
 285         case WREPLSRV_PULL_TABLE_STAGE_WAIT_CONNECTION:
 286                 c->status = wreplsrv_pull_table_wait_connection(state);
 287                 break;
 288         case WREPLSRV_PULL_TABLE_STAGE_WAIT_TABLE_REPLY:
 289                 c->status = wreplsrv_pull_table_wait_table_reply(state);
 290                 c->state  = COMPOSITE_STATE_DONE;
 291                 break;
 292         case WREPLSRV_PULL_TABLE_STAGE_DONE:
 293                 c->status = NT_STATUS_INTERNAL_ERROR;
 294         }
 295
 296         if (!NT_STATUS_IS_OK(c->status)) {
 297                 c->state = COMPOSITE_STATE_ERROR;
 298         }
 299
 300         if (c->state >= COMPOSITE_STATE_DONE && c->async.fn) {
 301                 c->async.fn(c);
 302         }
 303 }
 304
 305 static void wreplsrv_pull_table_handler_creq(struct composite_context *creq)
 306 {
 307         struct wreplsrv_pull_table_state *state = talloc_get_type(creq->async.private_data,
 308                                                   struct wreplsrv_pull_table_state);
 309         wreplsrv_pull_table_handler(state);
 310         return;
 311 }
 312
 313 static void wreplsrv_pull_table_handler_req(struct wrepl_request *req)
 314 {
 315         struct wreplsrv_pull_table_state *state = talloc_get_type(req->async.private,
 316                                                   struct wreplsrv_pull_table_state);
 317         wreplsrv_pull_table_handler(state);
 318         return;
 319 }
 320
 321 struct composite_context *wreplsrv_pull_table_send(TALLOC_CTX *mem_ctx, struct wreplsrv_pull_table_io *io)
 322 {
 323         struct composite_context *c = NULL;
 324         struct wreplsrv_service *service = io->in.partner->service;
 325         struct wreplsrv_pull_table_state *state = NULL;
 326
 327         c = talloc_zero(mem_ctx, struct composite_context);
 328         if (!c) goto failed;
 329
 330         state = talloc_zero(c, struct wreplsrv_pull_table_state);
 331         if (!state) goto failed;
 332         state->c        = c;
 333         state->io       = io;
 334
 335         c->state        = COMPOSITE_STATE_IN_PROGRESS;
 336         c->event_ctx    = service->task->event_ctx;
 337         c->private_data = state;
 338
 339         if (io->in.num_owners) {
 340                 state->table_io.out.num_partners        = io->in.num_owners;
 341                 state->table_io.out.partners            = io->in.owners;
 342                 state->stage                            = WREPLSRV_PULL_TABLE_STAGE_DONE;
 343                 composite_done(c);
 344                 return c;
 345         }
 346
 347         state->stage    = WREPLSRV_PULL_TABLE_STAGE_WAIT_CONNECTION;
 348         state->creq     = wreplsrv_out_connect_send(io->in.partner, WINSREPL_PARTNER_PULL, NULL);
 349         if (!state->creq) goto failed;
 350
 351         state->creq->async.fn           = wreplsrv_pull_table_handler_creq;
 352         state->creq->async.private_data = state;
 353
 354         return c;
 355 failed:
 356         talloc_free(c);
 357         return NULL;
 358 }
 359
 360 NTSTATUS wreplsrv_pull_table_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
 361                                   struct wreplsrv_pull_table_io *io)
 362 {
 363         NTSTATUS status;
 364
 365         status = composite_wait(c);
 366
 367         if (NT_STATUS_IS_OK(status)) {
 368                 struct wreplsrv_pull_table_state *state = talloc_get_type(c->private_data,
 369                                                           struct wreplsrv_pull_table_state);
 370                 io->out.num_owners      = state->table_io.out.num_partners;
 371                 io->out.owners          = state->table_io.out.partners;
 372                 talloc_reference(mem_ctx, state->table_io.out.partners);
 373         }
 374
 375         talloc_free(c);
 376         return status;
 377 }
 378
 379 enum wreplsrv_pull_names_stage {
 380         WREPLSRV_PULL_NAMES_STAGE_WAIT_CONNECTION,
 381         WREPLSRV_PULL_NAMES_STAGE_WAIT_SEND_REPLY,
 382         WREPLSRV_PULL_NAMES_STAGE_DONE
 383 };
 384
 385 struct wreplsrv_pull_names_state {
 386         enum wreplsrv_pull_names_stage stage;
 387         struct composite_context *c;
 388         struct wrepl_request *req;
 389         struct wrepl_pull_names pull_io;
 390         struct wreplsrv_pull_names_io *io;
 391         struct composite_context *creq;
 392         struct wreplsrv_out_connection *wreplconn;
 393 };
 394
 395 static void wreplsrv_pull_names_handler_req(struct wrepl_request *req);
 396
 397 static NTSTATUS wreplsrv_pull_names_wait_connection(struct wreplsrv_pull_names_state *state)
 398 {
 399         NTSTATUS status;
 400
 401         status = wreplsrv_out_connect_recv(state->creq, state, &state->wreplconn);
 402         NT_STATUS_NOT_OK_RETURN(status);
 403
 404         state->pull_io.in.assoc_ctx     = state->wreplconn->assoc_ctx.peer_ctx;
 405         state->pull_io.in.partner       = state->io->in.owner;
 406         state->req = wrepl_pull_names_send(state->wreplconn->sock, &state->pull_io);
 407         NT_STATUS_HAVE_NO_MEMORY(state->req);
 408
 409         state->req->async.fn            = wreplsrv_pull_names_handler_req;
 410         state->req->async.private       = state;
 411
 412         state->stage = WREPLSRV_PULL_NAMES_STAGE_WAIT_SEND_REPLY;
 413
 414         return NT_STATUS_OK;
 415 }
 416
 417 static NTSTATUS wreplsrv_pull_names_wait_send_reply(struct wreplsrv_pull_names_state *state)
 418 {
 419         NTSTATUS status;
 420
 421         status = wrepl_pull_names_recv(state->req, state, &state->pull_io);
 422         NT_STATUS_NOT_OK_RETURN(status);
 423
 424         state->stage = WREPLSRV_PULL_NAMES_STAGE_DONE;
 425
 426         return NT_STATUS_OK;
 427 }
 428
 429 static void wreplsrv_pull_names_handler(struct wreplsrv_pull_names_state *state)
 430 {
 431         struct composite_context *c = state->c;
 432
 433         switch (state->stage) {
 434         case WREPLSRV_PULL_NAMES_STAGE_WAIT_CONNECTION:
 435                 c->status = wreplsrv_pull_names_wait_connection(state);
 436                 break;
 437         case WREPLSRV_PULL_NAMES_STAGE_WAIT_SEND_REPLY:
 438                 c->status = wreplsrv_pull_names_wait_send_reply(state);
 439                 c->state  = COMPOSITE_STATE_DONE;
 440                 break;
 441         case WREPLSRV_PULL_NAMES_STAGE_DONE:
 442                 c->status = NT_STATUS_INTERNAL_ERROR;
 443         }
 444
 445         if (!NT_STATUS_IS_OK(c->status)) {
 446                 c->state = COMPOSITE_STATE_ERROR;
 447         }
 448
 449         if (c->state >= COMPOSITE_STATE_DONE && c->async.fn) {
 450                 c->async.fn(c);
 451         }
 452 }
 453
 454 static void wreplsrv_pull_names_handler_creq(struct composite_context *creq)
 455 {
 456         struct wreplsrv_pull_names_state *state = talloc_get_type(creq->async.private_data,
 457                                                   struct wreplsrv_pull_names_state);
 458         wreplsrv_pull_names_handler(state);
 459         return;
 460 }
 461
 462 static void wreplsrv_pull_names_handler_req(struct wrepl_request *req)
 463 {
 464         struct wreplsrv_pull_names_state *state = talloc_get_type(req->async.private,
 465                                                   struct wreplsrv_pull_names_state);
 466         wreplsrv_pull_names_handler(state);
 467         return;
 468 }
 469
 470 struct composite_context *wreplsrv_pull_names_send(TALLOC_CTX *mem_ctx, struct wreplsrv_pull_names_io *io)
 471 {
 472         struct composite_context *c = NULL;
 473         struct wreplsrv_service *service = io->in.partner->service;
 474         struct wreplsrv_pull_names_state *state = NULL;
 475         enum winsrepl_partner_type partner_type = WINSREPL_PARTNER_PULL;
 476
 477         if (io->in.wreplconn) partner_type = WINSREPL_PARTNER_NONE;
 478
 479         c = talloc_zero(mem_ctx, struct composite_context);
 480         if (!c) goto failed;
 481
 482         state = talloc_zero(c, struct wreplsrv_pull_names_state);
 483         if (!state) goto failed;
 484         state->c        = c;
 485         state->io       = io;
 486
 487         c->state        = COMPOSITE_STATE_IN_PROGRESS;
 488         c->event_ctx    = service->task->event_ctx;
 489         c->private_data = state;
 490
 491         state->stage    = WREPLSRV_PULL_NAMES_STAGE_WAIT_CONNECTION;
 492         state->creq     = wreplsrv_out_connect_send(io->in.partner, partner_type, io->in.wreplconn);
 493         if (!state->creq) goto failed;
 494
 495         state->creq->async.fn           = wreplsrv_pull_names_handler_creq;
 496         state->creq->async.private_data = state;
 497
 498         return c;
 499 failed:
 500         talloc_free(c);
 501         return NULL;
 502 }
 503
 504 NTSTATUS wreplsrv_pull_names_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
 505                                   struct wreplsrv_pull_names_io *io)
 506 {
 507         NTSTATUS status;
 508
 509         status = composite_wait(c);
 510
 511         if (NT_STATUS_IS_OK(status)) {
 512                 struct wreplsrv_pull_names_state *state = talloc_get_type(c->private_data,
 513                                                           struct wreplsrv_pull_names_state);
 514                 io->out.num_names       = state->pull_io.out.num_names;
 515                 io->out.names           = state->pull_io.out.names;
 516                 talloc_reference(mem_ctx, state->pull_io.out.names);
 517         }
 518
 519         talloc_free(c);
 520         return status;
 521
 522 }
 523
 524 enum wreplsrv_pull_cycle_stage {
 525         WREPLSRV_PULL_CYCLE_STAGE_WAIT_TABLE_REPLY,
 526         WREPLSRV_PULL_CYCLE_STAGE_WAIT_SEND_REPLIES,
 527         WREPLSRV_PULL_CYCLE_STAGE_WAIT_STOP_ASSOC,
 528         WREPLSRV_PULL_CYCLE_STAGE_DONE
 529 };
 530
 531 struct wreplsrv_pull_cycle_state {
 532         enum wreplsrv_pull_cycle_stage stage;
 533         struct composite_context *c;
 534         struct wreplsrv_pull_cycle_io *io;
 535         struct wreplsrv_pull_table_io table_io;
 536         uint32_t current;
 537         struct wreplsrv_pull_names_io names_io;
 538         struct composite_context *creq;
 539         struct wrepl_associate_stop assoc_stop_io;
 540         struct wrepl_request *req;
 541 };
 542
 543 static void wreplsrv_pull_cycle_handler_creq(struct composite_context *creq);
 544 static void wreplsrv_pull_cycle_handler_req(struct wrepl_request *req);
 545
 546 static NTSTATUS wreplsrv_pull_cycle_next_owner_do_work(struct wreplsrv_pull_cycle_state *state)
 547 {
 548         struct wreplsrv_owner *current_owner;
 549         struct wreplsrv_owner *local_owner;
 550         uint32_t i;
 551         uint64_t old_max_version = 0;
 552         BOOL do_pull = False;
 553
 554         for (i=state->current; i < state->table_io.out.num_owners; i++) {
 555                 current_owner = wreplsrv_find_owner(state->io->in.partner->pull.table,
 556                                                     state->table_io.out.owners[i].address);
 557
 558                 local_owner = wreplsrv_find_owner(state->io->in.partner->service->table,
 559                                                   state->table_io.out.owners[i].address);
 560                 /*
 561                  * this means we are ourself the current owner,
 562                  * and we don't want replicate ourself
 563                  */
 564                 if (!current_owner) continue;
 565
 566                 /*
 567                  * this means we don't have any records of this owner
 568                  * so fetch them
 569                  */
 570                 if (!local_owner) {
 571                         do_pull         = True;
 572
 573                         break;
 574                 }
 575
 576                 /*
 577                  * this means the remote partner has some new records of this owner
 578                  * fetch them
 579                  */
 580                 if (current_owner->owner.max_version > local_owner->owner.max_version) {
 581                         do_pull         = True;
 582                         old_max_version = local_owner->owner.max_version;
 583                         break;
 584                 }
 585         }
 586         state->current = i;
 587
 588         if (do_pull) {
 589                 state->names_io.in.partner              = state->io->in.partner;
 590                 state->names_io.in.wreplconn            = state->io->in.wreplconn;
 591                 state->names_io.in.owner                = current_owner->owner;
 592                 state->names_io.in.owner.min_version    = old_max_version + 1;
 593                 state->creq = wreplsrv_pull_names_send(state, &state->names_io);
 594                 NT_STATUS_HAVE_NO_MEMORY(state->creq);
 595
 596                 state->creq->async.fn           = wreplsrv_pull_cycle_handler_creq;
 597                 state->creq->async.private_data = state;
 598
 599                 return STATUS_MORE_ENTRIES;
 600         }
 601
 602         return NT_STATUS_OK;
 603 }
 604
 605 static NTSTATUS wreplsrv_pull_cycle_next_owner_wrapper(struct wreplsrv_pull_cycle_state *state)
 606 {
 607         NTSTATUS status;
 608
 609         status = wreplsrv_pull_cycle_next_owner_do_work(state);
 610         if (NT_STATUS_IS_OK(status)) {
 611                 state->stage = WREPLSRV_PULL_CYCLE_STAGE_DONE;
 612         } else if (NT_STATUS_EQUAL(STATUS_MORE_ENTRIES, status)) {
 613                 state->stage = WREPLSRV_PULL_CYCLE_STAGE_WAIT_SEND_REPLIES;
 614                 status = NT_STATUS_OK;
 615         }
 616
 617         if (state->stage == WREPLSRV_PULL_CYCLE_STAGE_DONE && state->io->in.wreplconn) {
 618                 state->assoc_stop_io.in.assoc_ctx       = state->io->in.wreplconn->assoc_ctx.peer_ctx;
 619                 state->assoc_stop_io.in.reason          = 0;
 620                 state->req = wrepl_associate_stop_send(state->io->in.wreplconn->sock, &state->assoc_stop_io);
 621                 NT_STATUS_HAVE_NO_MEMORY(state->req);
 622
 623                 state->req->async.fn            = wreplsrv_pull_cycle_handler_req;
 624                 state->req->async.private       = state;
 625
 626                 state->stage = WREPLSRV_PULL_CYCLE_STAGE_WAIT_STOP_ASSOC;
 627         }
 628
 629         return status;
 630 }
 631
 632 static NTSTATUS wreplsrv_pull_cycle_wait_table_reply(struct wreplsrv_pull_cycle_state *state)
 633 {
 634         NTSTATUS status;
 635         uint32_t i;
 636
 637         status = wreplsrv_pull_table_recv(state->creq, state, &state->table_io);
 638         NT_STATUS_NOT_OK_RETURN(status);
 639
 640         /* update partner table */
 641         for (i=0; i < state->table_io.out.num_owners; i++) {
 642                 BOOL is_our_addr;
 643
 644                 is_our_addr = wreplsrv_is_our_address(state->io->in.partner->service,
 645                                                       state->table_io.out.owners[i].address);
 646                 if (is_our_addr) continue;
 647
 648                 status = wreplsrv_add_table(state->io->in.partner->service,
 649                                             state->io->in.partner,
 650                                             &state->io->in.partner->pull.table,
 651                                             state->table_io.out.owners[i].address,
 652                                             state->table_io.out.owners[i].max_version);
 653                 NT_STATUS_NOT_OK_RETURN(status);
 654         }
 655
 656         status = wreplsrv_pull_cycle_next_owner_wrapper(state);
 657         NT_STATUS_NOT_OK_RETURN(status);
 658
 659         return status;
 660 }
 661
 662 static NTSTATUS wreplsrv_pull_cycle_apply_records(struct wreplsrv_pull_cycle_state *state)
 663 {
 664         NTSTATUS status;
 665
 666         status = wreplsrv_apply_records(state->io->in.partner, &state->names_io);
 667         NT_STATUS_NOT_OK_RETURN(status);
 668
 669         talloc_free(state->names_io.out.names);
 670         ZERO_STRUCT(state->names_io);
 671
 672         return NT_STATUS_OK;
 673 }
 674
 675 static NTSTATUS wreplsrv_pull_cycle_wait_send_replies(struct wreplsrv_pull_cycle_state *state)
 676 {
 677         NTSTATUS status;
 678
 679         status = wreplsrv_pull_names_recv(state->creq, state, &state->names_io);
 680         NT_STATUS_NOT_OK_RETURN(status);
 681
 682         /*
 683          * TODO: this should maybe an async call,
 684          *       because we may need some network access
 685          *       for conflict resolving
 686          */
 687         status = wreplsrv_pull_cycle_apply_records(state);
 688         NT_STATUS_NOT_OK_RETURN(status);
 689
 690         status = wreplsrv_pull_cycle_next_owner_wrapper(state);
 691         NT_STATUS_NOT_OK_RETURN(status);
 692
 693         return status;
 694 }
 695
 696 static NTSTATUS wreplsrv_pull_cycle_wait_stop_assoc(struct wreplsrv_pull_cycle_state *state)
 697 {
 698         NTSTATUS status;
 699
 700         status = wrepl_associate_stop_recv(state->req, &state->assoc_stop_io);
 701         NT_STATUS_NOT_OK_RETURN(status);
 702
 703         state->stage = WREPLSRV_PULL_CYCLE_STAGE_DONE;
 704
 705         return status;
 706 }
 707
 708 static void wreplsrv_pull_cycle_handler(struct wreplsrv_pull_cycle_state *state)
 709 {
 710         struct composite_context *c = state->c;
 711
 712         switch (state->stage) {
 713         case WREPLSRV_PULL_CYCLE_STAGE_WAIT_TABLE_REPLY:
 714                 c->status = wreplsrv_pull_cycle_wait_table_reply(state);
 715                 break;
 716         case WREPLSRV_PULL_CYCLE_STAGE_WAIT_SEND_REPLIES:
 717                 c->status = wreplsrv_pull_cycle_wait_send_replies(state);
 718                 break;
 719         case WREPLSRV_PULL_CYCLE_STAGE_WAIT_STOP_ASSOC:
 720                 c->status = wreplsrv_pull_cycle_wait_stop_assoc(state);
 721                 break;
 722         case WREPLSRV_PULL_CYCLE_STAGE_DONE:
 723                 c->status = NT_STATUS_INTERNAL_ERROR;
 724         }
 725
 726         if (state->stage == WREPLSRV_PULL_CYCLE_STAGE_DONE) {
 727                 c->state  = COMPOSITE_STATE_DONE;
 728         }
 729
 730         if (!NT_STATUS_IS_OK(c->status)) {
 731                 c->state = COMPOSITE_STATE_ERROR;
 732         }
 733
 734         if (c->state >= COMPOSITE_STATE_DONE && c->async.fn) {
 735                 c->async.fn(c);
 736         }
 737 }
 738
 739 static void wreplsrv_pull_cycle_handler_creq(struct composite_context *creq)
 740 {
 741         struct wreplsrv_pull_cycle_state *state = talloc_get_type(creq->async.private_data,
 742                                                   struct wreplsrv_pull_cycle_state);
 743         wreplsrv_pull_cycle_handler(state);
 744         return;
 745 }
 746
 747 static void wreplsrv_pull_cycle_handler_req(struct wrepl_request *req)
 748 {
 749         struct wreplsrv_pull_cycle_state *state = talloc_get_type(req->async.private,
 750                                                   struct wreplsrv_pull_cycle_state);
 751         wreplsrv_pull_cycle_handler(state);
 752         return;
 753 }
 754
 755 struct composite_context *wreplsrv_pull_cycle_send(TALLOC_CTX *mem_ctx, struct wreplsrv_pull_cycle_io *io)
 756 {
 757         struct composite_context *c = NULL;
 758         struct wreplsrv_service *service = io->in.partner->service;
 759         struct wreplsrv_pull_cycle_state *state = NULL;
 760
 761         c = talloc_zero(mem_ctx, struct composite_context);
 762         if (!c) goto failed;
 763
 764         state = talloc_zero(c, struct wreplsrv_pull_cycle_state);
 765         if (!state) goto failed;
 766         state->c        = c;
 767         state->io       = io;
 768
 769         c->state        = COMPOSITE_STATE_IN_PROGRESS;
 770         c->event_ctx    = service->task->event_ctx;
 771         c->private_data = state;
 772
 773         state->stage    = WREPLSRV_PULL_CYCLE_STAGE_WAIT_TABLE_REPLY;
 774         state->table_io.in.partner      = io->in.partner;
 775         state->table_io.in.num_owners   = io->in.num_owners;
 776         state->table_io.in.owners       = io->in.owners;
 777         state->creq = wreplsrv_pull_table_send(state, &state->table_io);
 778         if (!state->creq) goto failed;
 779
 780         state->creq->async.fn           = wreplsrv_pull_cycle_handler_creq;
 781         state->creq->async.private_data = state;
 782
 783         return c;
 784 failed:
 785         talloc_free(c);
 786         return NULL;
 787 }
 788
 789 NTSTATUS wreplsrv_pull_cycle_recv(struct composite_context *c)
 790 {
 791         NTSTATUS status;
 792
 793         status = composite_wait(c);
 794
 795         talloc_free(c);
 796         return status;
 797 }
 798
 799 enum wreplsrv_push_notify_stage {
 800         WREPLSRV_PUSH_NOTIFY_STAGE_WAIT_CONNECT,
 801         WREPLSRV_PUSH_NOTIFY_STAGE_WAIT_INFORM,
 802         WREPLSRV_PUSH_NOTIFY_STAGE_DONE
 803 };
 804
 805 struct wreplsrv_push_notify_state {
 806         enum wreplsrv_push_notify_stage stage;
 807         struct composite_context *c;
 808         struct wreplsrv_push_notify_io *io;
 809         enum wrepl_replication_cmd command;
 810         BOOL full_table;
 811         struct wrepl_send_ctrl ctrl;
 812         struct wrepl_request *req;
 813         struct wrepl_packet req_packet;
 814         struct wrepl_packet *rep_packet;
 815         struct composite_context *creq;
 816         struct wreplsrv_out_connection *wreplconn;
 817 };
 818
 819 static void wreplsrv_push_notify_handler_creq(struct composite_context *creq);
 820 static void wreplsrv_push_notify_handler_req(struct wrepl_request *req);
 821
 822 static NTSTATUS wreplsrv_push_notify_update(struct wreplsrv_push_notify_state *state)
 823 {
 824         struct wreplsrv_service *service = state->io->in.partner->service;
 825         struct wrepl_packet *req = &state->req_packet;
 826         struct wrepl_replication *repl_out = &state->req_packet.message.replication;
 827         struct wrepl_table *table_out = &state->req_packet.message.replication.info.table;
 828         struct wreplsrv_in_connection *wrepl_in;
 829         NTSTATUS status;
 830         struct socket_context *sock;
 831         struct packet_context *packet;
 832         uint16_t fde_flags;
 833         const char *our_ip;
 834
 835         /* prepare the outgoing request */
 836         req->opcode     = WREPL_OPCODE_BITS;
 837         req->assoc_ctx  = state->wreplconn->assoc_ctx.peer_ctx;
 838         req->mess_type  = WREPL_REPLICATION;
 839
 840         repl_out->command = state->command;
 841
 842         our_ip = socket_get_my_addr(state->wreplconn->sock->sock, state);
 843         NT_STATUS_HAVE_NO_MEMORY(our_ip);
 844
 845         status = wreplsrv_fill_wrepl_table(service, state, table_out,
 846                                            our_ip, our_ip, state->full_table);
 847         NT_STATUS_NOT_OK_RETURN(status);
 848
 849         /* queue the request */
 850         state->req = wrepl_request_send(state->wreplconn->sock, req, NULL);
 851         NT_STATUS_HAVE_NO_MEMORY(state->req);
 852
 853         /*
 854          * now we need to convert the wrepl_socket (client connection)
 855          * into a wreplsrv_in_connection (server connection), because
 856          * we'll act as a server on this connection after the WREPL_REPL_UPDATE*
 857          * message is received by the peer.
 858          */
 859
 860         /* steal the socket_context */
 861         sock = state->wreplconn->sock->sock;
 862         state->wreplconn->sock->sock = NULL;
 863         talloc_steal(state, sock);
 864
 865         /*
 866          * steal the packet_context
 867          * note the request DATA_BLOB we just send on the
 868          * wrepl_socket (client connection) is still unter the
 869          * packet context and will be send to the wire
 870          */
 871         packet = state->wreplconn->sock->packet;
 872         state->wreplconn->sock->packet = NULL;
 873         talloc_steal(state, packet);
 874
 875         /*
 876          * get the fde_flags of the old fde event,
 877          * so that we can later set the same flags to the new one
 878          */
 879         fde_flags = event_get_fd_flags(state->wreplconn->sock->event.fde);
 880
 881         /*
 882          * free the wrepl_socket (client connection)
 883          */
 884         talloc_free(state->wreplconn->sock);
 885         state->wreplconn->sock = NULL;
 886
 887         /*
 888          * now create a wreplsrv_in_connection,
 889          * on which we act as server
 890          *
 891          * NOTE: sock and packet will be stolen by
 892          *       wreplsrv_in_connection_merge()
 893          */
 894         status = wreplsrv_in_connection_merge(state->io->in.partner,
 895                                               sock, packet, &wrepl_in);
 896         NT_STATUS_NOT_OK_RETURN(status);
 897
 898         event_set_fd_flags(wrepl_in->conn->event.fde, fde_flags);
 899
 900         wrepl_in->assoc_ctx.peer_ctx    = state->wreplconn->assoc_ctx.peer_ctx;
 901         wrepl_in->assoc_ctx.our_ctx     = 0;
 902
 903         /* now we can free the wreplsrv_out_connection */
 904         talloc_free(state->wreplconn);
 905         state->wreplconn = NULL;
 906
 907         state->stage = WREPLSRV_PUSH_NOTIFY_STAGE_DONE;
 908
 909         return NT_STATUS_OK;
 910 }
 911
 912 static NTSTATUS wreplsrv_push_notify_inform(struct wreplsrv_push_notify_state *state)
 913 {
 914         struct wreplsrv_service *service = state->io->in.partner->service;
 915         struct wrepl_packet *req = &state->req_packet;
 916         struct wrepl_replication *repl_out = &state->req_packet.message.replication;
 917         struct wrepl_table *table_out = &state->req_packet.message.replication.info.table;
 918         NTSTATUS status;
 919         const char *our_ip;
 920
 921         req->opcode     = WREPL_OPCODE_BITS;
 922         req->assoc_ctx  = state->wreplconn->assoc_ctx.peer_ctx;
 923         req->mess_type  = WREPL_REPLICATION;
 924
 925         repl_out->command = state->command;
 926
 927         our_ip = socket_get_my_addr(state->wreplconn->sock->sock, state);
 928         NT_STATUS_HAVE_NO_MEMORY(our_ip);
 929
 930         status = wreplsrv_fill_wrepl_table(service, state, table_out,
 931                                            our_ip, our_ip, state->full_table);
 932         NT_STATUS_NOT_OK_RETURN(status);
 933
 934         /* we won't get a reply to a inform message */
 935         state->ctrl.send_only           = True;
 936
 937         state->req = wrepl_request_send(state->wreplconn->sock, req, &state->ctrl);
 938         NT_STATUS_HAVE_NO_MEMORY(state->req);
 939
 940         state->req->async.fn            = wreplsrv_push_notify_handler_req;
 941         state->req->async.private       = state;
 942
 943         state->stage = WREPLSRV_PUSH_NOTIFY_STAGE_WAIT_INFORM;
 944
 945         return NT_STATUS_OK;
 946 }
 947
 948 static NTSTATUS wreplsrv_push_notify_wait_connect(struct wreplsrv_push_notify_state *state)
 949 {
 950         NTSTATUS status;
 951
 952         status = wreplsrv_out_connect_recv(state->creq, state, &state->wreplconn);
 953         NT_STATUS_NOT_OK_RETURN(status);
 954
 955         switch (state->command) {
 956         case WREPL_REPL_UPDATE:
 957                 state->full_table = True;
 958                 return wreplsrv_push_notify_update(state);
 959         case WREPL_REPL_UPDATE2:
 960                 state->full_table = False;
 961                 return wreplsrv_push_notify_update(state);
 962         case WREPL_REPL_INFORM:
 963                 state->full_table = True;
 964                 return wreplsrv_push_notify_inform(state);
 965         case WREPL_REPL_INFORM2:
 966                 state->full_table = False;
 967                 return wreplsrv_push_notify_inform(state);
 968         default:
 969                 return NT_STATUS_INTERNAL_ERROR;
 970         }
 971
 972         return NT_STATUS_INTERNAL_ERROR;
 973 }
 974
 975 static NTSTATUS wreplsrv_push_notify_wait_inform(struct wreplsrv_push_notify_state *state)
 976 {
 977         NTSTATUS status;
 978
 979         status =  wrepl_request_recv(state->req, state, NULL);
 980         NT_STATUS_NOT_OK_RETURN(status);
 981
 982         state->stage = WREPLSRV_PUSH_NOTIFY_STAGE_DONE;
 983         return status;
 984 }
 985
 986 static void wreplsrv_push_notify_handler(struct wreplsrv_push_notify_state *state)
 987 {
 988         struct composite_context *c = state->c;
 989
 990         switch (state->stage) {
 991         case WREPLSRV_PUSH_NOTIFY_STAGE_WAIT_CONNECT:
 992                 c->status = wreplsrv_push_notify_wait_connect(state);
 993                 break;
 994         case WREPLSRV_PUSH_NOTIFY_STAGE_WAIT_INFORM:
 995                 c->status = wreplsrv_push_notify_wait_inform(state);
 996                 break;
 997         case WREPLSRV_PUSH_NOTIFY_STAGE_DONE:
 998                 c->status = NT_STATUS_INTERNAL_ERROR;
 999         }
1000
1001         if (state->stage == WREPLSRV_PUSH_NOTIFY_STAGE_DONE) {
1002                 c->state  = COMPOSITE_STATE_DONE;
1003         }
1004
1005         if (!NT_STATUS_IS_OK(c->status)) {
1006                 c->state = COMPOSITE_STATE_ERROR;
1007         }
1008
1009         if (c->state >= COMPOSITE_STATE_DONE && c->async.fn) {
1010                 c->async.fn(c);
1011         }
1012 }
1013
1014 static void wreplsrv_push_notify_handler_creq(struct composite_context *creq)
1015 {
1016         struct wreplsrv_push_notify_state *state = talloc_get_type(creq->async.private_data,
1017                                                    struct wreplsrv_push_notify_state);
1018         wreplsrv_push_notify_handler(state);
1019         return;
1020 }
1021
1022 static void wreplsrv_push_notify_handler_req(struct wrepl_request *req)
1023 {
1024         struct wreplsrv_push_notify_state *state = talloc_get_type(req->async.private,
1025                                                    struct wreplsrv_push_notify_state);
1026         wreplsrv_push_notify_handler(state);
1027         return;
1028 }
1029
1030 struct composite_context *wreplsrv_push_notify_send(TALLOC_CTX *mem_ctx, struct wreplsrv_push_notify_io *io)
1031 {
1032         struct composite_context *c = NULL;
1033         struct wreplsrv_service *service = io->in.partner->service;
1034         struct wreplsrv_push_notify_state *state = NULL;
1035         enum winsrepl_partner_type partner_type;
1036
1037         c = talloc_zero(mem_ctx, struct composite_context);
1038         if (!c) goto failed;
1039
1040         state = talloc_zero(c, struct wreplsrv_push_notify_state);
1041         if (!state) goto failed;
1042         state->c        = c;
1043         state->io       = io;
1044
1045         if (io->in.inform) {
1046                 /* we can cache the connection in partner->push->wreplconn */
1047                 partner_type = WINSREPL_PARTNER_PUSH;
1048                 if (io->in.propagate) {
1049                         state->command  = WREPL_REPL_INFORM2;
1050                 } else {
1051                         state->command  = WREPL_REPL_INFORM;
1052                 }
1053         } else {
1054                 /* we can NOT cache the connection */
1055                 partner_type = WINSREPL_PARTNER_NONE;
1056                 if (io->in.propagate) {
1057                         state->command  = WREPL_REPL_UPDATE2;
1058                 } else {
1059                         state->command  = WREPL_REPL_UPDATE;
1060                 }
1061         }
1062
1063         c->state        = COMPOSITE_STATE_IN_PROGRESS;
1064         c->event_ctx    = service->task->event_ctx;
1065         c->private_data = state;
1066
1067         state->stage    = WREPLSRV_PUSH_NOTIFY_STAGE_WAIT_CONNECT;
1068         state->creq     = wreplsrv_out_connect_send(io->in.partner, partner_type, NULL);
1069         if (!state->creq) goto failed;
1070
1071         state->creq->async.fn           = wreplsrv_push_notify_handler_creq;
1072         state->creq->async.private_data = state;
1073
1074         return c;
1075 failed:
1076         talloc_free(c);
1077         return NULL;
1078 }
1079
1080 NTSTATUS wreplsrv_push_notify_recv(struct composite_context *c)
1081 {
1082         NTSTATUS status;
1083
1084         status = composite_wait(c);
1085
1086         talloc_free(c);
1087         return status;
1088 }