source4/libcli/wrepl/winsrepl.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    low level WINS replication client code
   5
   6    Copyright (C) Andrew Tridgell 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/util/dlinklist.h"
  25 #include "lib/socket/socket.h"
  26 #include "libcli/wrepl/winsrepl.h"
  27 #include "librpc/gen_ndr/ndr_winsrepl.h"
  28 #include "lib/stream/packet.h"
  29 #include "libcli/composite/composite.h"
  30 #include "system/network.h"
  31 #include "lib/socket/netif.h"
  32 #include "param/param.h"
  33 #include "libcli/resolve/resolve.h"
  34
  35 static struct wrepl_request *wrepl_request_finished(struct wrepl_request *req, NTSTATUS status);
  36
  37 /*
  38   mark all pending requests as dead - called when a socket error happens
  39 */
  40 static void wrepl_socket_dead(struct wrepl_socket *wrepl_socket, NTSTATUS status)
  41 {
  42         wrepl_socket->dead = true;
  43
  44         if (wrepl_socket->packet) {
  45                 packet_recv_disable(wrepl_socket->packet);
  46                 packet_set_fde(wrepl_socket->packet, NULL);
  47                 packet_set_socket(wrepl_socket->packet, NULL);
  48         }
  49
  50         if (wrepl_socket->event.fde) {
  51                 talloc_free(wrepl_socket->event.fde);
  52                 wrepl_socket->event.fde = NULL;
  53         }
  54
  55         if (wrepl_socket->sock) {
  56                 talloc_free(wrepl_socket->sock);
  57                 wrepl_socket->sock = NULL;
  58         }
  59
  60         if (NT_STATUS_EQUAL(NT_STATUS_UNSUCCESSFUL, status)) {
  61                 status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
  62         }
  63         while (wrepl_socket->recv_queue) {
  64                 struct wrepl_request *req = wrepl_socket->recv_queue;
  65                 DLIST_REMOVE(wrepl_socket->recv_queue, req);
  66                 wrepl_request_finished(req, status);
  67         }
  68
  69         talloc_set_destructor(wrepl_socket, NULL);
  70         if (wrepl_socket->free_skipped) {
  71                 talloc_free(wrepl_socket);
  72         }
  73 }
  74
  75 static void wrepl_request_timeout_handler(struct event_context *ev, struct timed_event *te,
  76                                           struct timeval t, void *ptr)
  77 {
  78         struct wrepl_request *req = talloc_get_type(ptr, struct wrepl_request);
  79         wrepl_socket_dead(req->wrepl_socket, NT_STATUS_IO_TIMEOUT);
  80 }
  81
  82 /*
  83   handle recv events
  84 */
  85 static NTSTATUS wrepl_finish_recv(void *private, DATA_BLOB packet_blob_in)
  86 {
  87         struct wrepl_socket *wrepl_socket = talloc_get_type(private, struct wrepl_socket);
  88         struct wrepl_request *req = wrepl_socket->recv_queue;
  89         DATA_BLOB blob;
  90         enum ndr_err_code ndr_err;
  91
  92         if (!req) {
  93                 DEBUG(1,("Received unexpected WINS packet of length %u!\n",
  94                          (unsigned)packet_blob_in.length));
  95                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
  96         }
  97
  98         req->packet = talloc(req, struct wrepl_packet);
  99         NT_STATUS_HAVE_NO_MEMORY(req->packet);
 100
 101         blob.data = packet_blob_in.data + 4;
 102         blob.length = packet_blob_in.length - 4;
 103
 104         /* we have a full request - parse it */
 105         ndr_err = ndr_pull_struct_blob(&blob, req->packet, wrepl_socket->iconv_convenience, req->packet,
 106                                        (ndr_pull_flags_fn_t)ndr_pull_wrepl_packet);
 107         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 108                 NTSTATUS status = ndr_map_error2ntstatus(ndr_err);
 109                 wrepl_request_finished(req, status);
 110                 return NT_STATUS_OK;
 111         }
 112
 113         if (DEBUGLVL(10)) {
 114                 DEBUG(10,("Received WINS packet of length %u\n",
 115                           (unsigned)packet_blob_in.length));
 116                 NDR_PRINT_DEBUG(wrepl_packet, req->packet);
 117         }
 118
 119         wrepl_request_finished(req, NT_STATUS_OK);
 120         return NT_STATUS_OK;
 121 }
 122
 123 /*
 124   handler for winrepl events
 125 */
 126 static void wrepl_handler(struct event_context *ev, struct fd_event *fde,
 127                           uint16_t flags, void *private)
 128 {
 129         struct wrepl_socket *wrepl_socket = talloc_get_type(private,
 130                                                             struct wrepl_socket);
 131         if (flags & EVENT_FD_READ) {
 132                 packet_recv(wrepl_socket->packet);
 133                 return;
 134         }
 135         if (flags & EVENT_FD_WRITE) {
 136                 packet_queue_run(wrepl_socket->packet);
 137         }
 138 }
 139
 140 static void wrepl_error(void *private, NTSTATUS status)
 141 {
 142         struct wrepl_socket *wrepl_socket = talloc_get_type(private,
 143                                                             struct wrepl_socket);
 144         wrepl_socket_dead(wrepl_socket, status);
 145 }
 146
 147
 148 /*
 149   destroy a wrepl_socket destructor
 150 */
 151 static int wrepl_socket_destructor(struct wrepl_socket *sock)
 152 {
 153         if (sock->dead) {
 154                 sock->free_skipped = true;
 155                 return -1;
 156         }
 157         wrepl_socket_dead(sock, NT_STATUS_LOCAL_DISCONNECT);
 158         return 0;
 159 }
 160
 161 /*
 162   initialise a wrepl_socket. The event_ctx is optional, if provided then
 163   operations will use that event context
 164 */
 165 struct wrepl_socket *wrepl_socket_init(TALLOC_CTX *mem_ctx,
 166                                        struct event_context *event_ctx,
 167                                        struct smb_iconv_convenience *iconv_convenience)
 168 {
 169         struct wrepl_socket *wrepl_socket;
 170         NTSTATUS status;
 171
 172         wrepl_socket = talloc_zero(mem_ctx, struct wrepl_socket);
 173         if (!wrepl_socket) return NULL;
 174
 175         wrepl_socket->event.ctx = talloc_reference(wrepl_socket, event_ctx);
 176         if (!wrepl_socket->event.ctx) goto failed;
 177
 178         wrepl_socket->iconv_convenience = iconv_convenience;
 179
 180         status = socket_create("ip", SOCKET_TYPE_STREAM, &wrepl_socket->sock, 0);
 181         if (!NT_STATUS_IS_OK(status)) goto failed;
 182
 183         talloc_steal(wrepl_socket, wrepl_socket->sock);
 184
 185         wrepl_socket->request_timeout   = WREPL_SOCKET_REQUEST_TIMEOUT;
 186
 187         talloc_set_destructor(wrepl_socket, wrepl_socket_destructor);
 188
 189         return wrepl_socket;
 190
 191 failed:
 192         talloc_free(wrepl_socket);
 193         return NULL;
 194 }
 195
 196 /*
 197   initialise a wrepl_socket from an already existing connection
 198 */
 199 struct wrepl_socket *wrepl_socket_merge(TALLOC_CTX *mem_ctx,
 200                                         struct event_context *event_ctx,
 201                                         struct socket_context *sock,
 202                                         struct packet_context *pack)
 203 {
 204         struct wrepl_socket *wrepl_socket;
 205
 206         wrepl_socket = talloc_zero(mem_ctx, struct wrepl_socket);
 207         if (wrepl_socket == NULL) goto failed;
 208
 209         wrepl_socket->event.ctx = talloc_reference(wrepl_socket, event_ctx);
 210         if (wrepl_socket->event.ctx == NULL) goto failed;
 211
 212         wrepl_socket->sock = sock;
 213         talloc_steal(wrepl_socket, wrepl_socket->sock);
 214
 215
 216         wrepl_socket->request_timeout   = WREPL_SOCKET_REQUEST_TIMEOUT;
 217
 218         wrepl_socket->event.fde = event_add_fd(wrepl_socket->event.ctx, wrepl_socket,
 219                                                socket_get_fd(wrepl_socket->sock),
 220                                                EVENT_FD_READ,
 221                                                wrepl_handler, wrepl_socket);
 222         if (wrepl_socket->event.fde == NULL) {
 223                 goto failed;
 224         }
 225
 226         wrepl_socket->packet = pack;
 227         talloc_steal(wrepl_socket, wrepl_socket->packet);
 228         packet_set_private(wrepl_socket->packet, wrepl_socket);
 229         packet_set_socket(wrepl_socket->packet, wrepl_socket->sock);
 230         packet_set_callback(wrepl_socket->packet, wrepl_finish_recv);
 231         packet_set_full_request(wrepl_socket->packet, packet_full_request_u32);
 232         packet_set_error_handler(wrepl_socket->packet, wrepl_error);
 233         packet_set_event_context(wrepl_socket->packet, wrepl_socket->event.ctx);
 234         packet_set_fde(wrepl_socket->packet, wrepl_socket->event.fde);
 235         packet_set_serialise(wrepl_socket->packet);
 236
 237         talloc_set_destructor(wrepl_socket, wrepl_socket_destructor);
 238
 239         return wrepl_socket;
 240
 241 failed:
 242         talloc_free(wrepl_socket);
 243         return NULL;
 244 }
 245
 246 /*
 247   destroy a wrepl_request
 248 */
 249 static int wrepl_request_destructor(struct wrepl_request *req)
 250 {
 251         if (req->state == WREPL_REQUEST_RECV) {
 252                 DLIST_REMOVE(req->wrepl_socket->recv_queue, req);
 253         }
 254         req->state = WREPL_REQUEST_ERROR;
 255         return 0;
 256 }
 257
 258 /*
 259   wait for a request to complete
 260 */
 261 static NTSTATUS wrepl_request_wait(struct wrepl_request *req)
 262 {
 263         NT_STATUS_HAVE_NO_MEMORY(req);
 264         while (req->state < WREPL_REQUEST_DONE) {
 265                 event_loop_once(req->wrepl_socket->event.ctx);
 266         }
 267         return req->status;
 268 }
 269
 270 struct wrepl_connect_state {
 271         struct composite_context *result;
 272         struct wrepl_socket *wrepl_socket;
 273         struct composite_context *creq;
 274 };
 275
 276 /*
 277   handler for winrepl connection completion
 278 */
 279 static void wrepl_connect_handler(struct composite_context *creq)
 280 {
 281         struct wrepl_connect_state *state = talloc_get_type(creq->async.private_data,
 282                                             struct wrepl_connect_state);
 283         struct wrepl_socket *wrepl_socket = state->wrepl_socket;
 284         struct composite_context *result = state->result;
 285
 286         result->status = socket_connect_recv(state->creq);
 287         if (!composite_is_ok(result)) return;
 288
 289         wrepl_socket->event.fde = event_add_fd(wrepl_socket->event.ctx, wrepl_socket,
 290                                                socket_get_fd(wrepl_socket->sock),
 291                                                EVENT_FD_READ,
 292                                                wrepl_handler, wrepl_socket);
 293         if (composite_nomem(wrepl_socket->event.fde, result)) return;
 294
 295         /* setup the stream -> packet parser */
 296         wrepl_socket->packet = packet_init(wrepl_socket);
 297         if (composite_nomem(wrepl_socket->packet, result)) return;
 298         packet_set_private(wrepl_socket->packet, wrepl_socket);
 299         packet_set_socket(wrepl_socket->packet, wrepl_socket->sock);
 300         packet_set_callback(wrepl_socket->packet, wrepl_finish_recv);
 301         packet_set_full_request(wrepl_socket->packet, packet_full_request_u32);
 302         packet_set_error_handler(wrepl_socket->packet, wrepl_error);
 303         packet_set_event_context(wrepl_socket->packet, wrepl_socket->event.ctx);
 304         packet_set_fde(wrepl_socket->packet, wrepl_socket->event.fde);
 305         packet_set_serialise(wrepl_socket->packet);
 306
 307         composite_done(result);
 308 }
 309
 310 const char *wrepl_best_ip(struct loadparm_context *lp_ctx, const char *peer_ip)
 311 {
 312         struct interface *ifaces;
 313         load_interfaces(lp_ctx, lp_interfaces(lp_ctx), &ifaces);
 314         return iface_best_ip(ifaces, peer_ip);
 315 }
 316
 317
 318 /*
 319   connect a wrepl_socket to a WINS server
 320 */
 321 struct composite_context *wrepl_connect_send(struct wrepl_socket *wrepl_socket,
 322                                              struct resolve_context *resolve_ctx,
 323                                              const char *our_ip, const char *peer_ip)
 324 {
 325         struct composite_context *result;
 326         struct wrepl_connect_state *state;
 327         struct socket_address *peer, *us;
 328
 329         result = talloc_zero(wrepl_socket, struct composite_context);
 330         if (!result) return NULL;
 331
 332         result->state           = COMPOSITE_STATE_IN_PROGRESS;
 333         result->event_ctx       = wrepl_socket->event.ctx;
 334
 335         state = talloc_zero(result, struct wrepl_connect_state);
 336         if (composite_nomem(state, result)) return result;
 337         result->private_data    = state;
 338         state->result           = result;
 339         state->wrepl_socket     = wrepl_socket;
 340
 341         us = socket_address_from_strings(state, wrepl_socket->sock->backend_name,
 342                                          our_ip, 0);
 343         if (composite_nomem(us, result)) return result;
 344
 345         peer = socket_address_from_strings(state, wrepl_socket->sock->backend_name,
 346                                            peer_ip, WINS_REPLICATION_PORT);
 347         if (composite_nomem(peer, result)) return result;
 348
 349         state->creq = socket_connect_send(wrepl_socket->sock, us, peer,
 350                                           0, resolve_ctx,
 351                                           wrepl_socket->event.ctx);
 352         composite_continue(result, state->creq, wrepl_connect_handler, state);
 353         return result;
 354 }
 355
 356 /*
 357   connect a wrepl_socket to a WINS server - recv side
 358 */
 359 NTSTATUS wrepl_connect_recv(struct composite_context *result)
 360 {
 361         struct wrepl_connect_state *state = talloc_get_type(result->private_data,
 362                                             struct wrepl_connect_state);
 363         struct wrepl_socket *wrepl_socket = state->wrepl_socket;
 364         NTSTATUS status = composite_wait(result);
 365
 366         if (!NT_STATUS_IS_OK(status)) {
 367                 wrepl_socket_dead(wrepl_socket, status);
 368         }
 369
 370         talloc_free(result);
 371         return status;
 372 }
 373
 374 /*
 375   connect a wrepl_socket to a WINS server - sync API
 376 */
 377 NTSTATUS wrepl_connect(struct wrepl_socket *wrepl_socket, struct resolve_context *resolve_ctx,
 378                        const char *our_ip, const char *peer_ip)
 379 {
 380         struct composite_context *c_req = wrepl_connect_send(wrepl_socket, resolve_ctx, our_ip, peer_ip);
 381         return wrepl_connect_recv(c_req);
 382 }
 383
 384 /*
 385    callback from wrepl_request_trigger()
 386 */
 387 static void wrepl_request_trigger_handler(struct event_context *ev, struct timed_event *te,
 388                                           struct timeval t, void *ptr)
 389 {
 390         struct wrepl_request *req = talloc_get_type(ptr, struct wrepl_request);
 391         if (req->async.fn) {
 392                 req->async.fn(req);
 393         }
 394 }
 395
 396 /*
 397   trigger an immediate event on a wrepl_request
 398   the return value should only be used in wrepl_request_send()
 399   this is the only place where req->trigger is true
 400 */
 401 static struct wrepl_request *wrepl_request_finished(struct wrepl_request *req, NTSTATUS status)
 402 {
 403         struct timed_event *te;
 404
 405         if (req->state == WREPL_REQUEST_RECV) {
 406                 DLIST_REMOVE(req->wrepl_socket->recv_queue, req);
 407         }
 408
 409         if (!NT_STATUS_IS_OK(status)) {
 410                 req->state      = WREPL_REQUEST_ERROR;
 411         } else {
 412                 req->state      = WREPL_REQUEST_DONE;
 413         }
 414
 415         req->status     = status;
 416
 417         if (req->trigger) {
 418                 req->trigger = false;
 419                 /* a zero timeout means immediate */
 420                 te = event_add_timed(req->wrepl_socket->event.ctx,
 421                                      req, timeval_zero(),
 422                                      wrepl_request_trigger_handler, req);
 423                 if (!te) {
 424                         talloc_free(req);
 425                         return NULL;
 426                 }
 427                 return req;
 428         }
 429
 430         if (req->async.fn) {
 431                 req->async.fn(req);
 432         }
 433         return NULL;
 434 }
 435
 436 struct wrepl_send_ctrl_state {
 437         struct wrepl_send_ctrl ctrl;
 438         struct wrepl_request *req;
 439         struct wrepl_socket *wrepl_sock;
 440 };
 441
 442 static int wrepl_send_ctrl_destructor(struct wrepl_send_ctrl_state *s)
 443 {
 444         struct wrepl_request *req = s->wrepl_sock->recv_queue;
 445
 446         /* check if the request is still in WREPL_STATE_RECV,
 447          * we need this here because the caller has may called
 448          * talloc_free(req) and wrepl_send_ctrl_state isn't
 449          * a talloc child of the request, so our s->req pointer
 450          * is maybe invalid!
 451          */
 452         for (; req; req = req->next) {
 453                 if (req == s->req) break;
 454         }
 455         if (!req) return 0;
 456
 457         /* here, we need to make sure the async request handler is called
 458          * later in the next event_loop and now now
 459          */
 460         req->trigger = true;
 461         wrepl_request_finished(req, NT_STATUS_OK);
 462
 463         if (s->ctrl.disconnect_after_send) {
 464                 wrepl_socket_dead(s->wrepl_sock, NT_STATUS_LOCAL_DISCONNECT);
 465         }
 466
 467         return 0;
 468 }
 469
 470 /*
 471   send a generic wins replication request
 472 */
 473 struct wrepl_request *wrepl_request_send(struct wrepl_socket *wrepl_socket,
 474                                          struct wrepl_packet *packet,
 475                                          struct wrepl_send_ctrl *ctrl)
 476 {
 477         struct wrepl_request *req;
 478         struct wrepl_wrap wrap;
 479         DATA_BLOB blob;
 480         NTSTATUS status;
 481         enum ndr_err_code ndr_err;
 482
 483         req = talloc_zero(wrepl_socket, struct wrepl_request);
 484         if (!req) return NULL;
 485         req->wrepl_socket = wrepl_socket;
 486         req->state        = WREPL_REQUEST_RECV;
 487         req->trigger      = true;
 488
 489         DLIST_ADD_END(wrepl_socket->recv_queue, req, struct wrepl_request *);
 490         talloc_set_destructor(req, wrepl_request_destructor);
 491
 492         if (wrepl_socket->dead) {
 493                 return wrepl_request_finished(req, NT_STATUS_INVALID_CONNECTION);
 494         }
 495
 496         wrap.packet = *packet;
 497         ndr_err = ndr_push_struct_blob(&blob, req, wrepl_socket->iconv_convenience, &wrap,
 498                                        (ndr_push_flags_fn_t)ndr_push_wrepl_wrap);
 499         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 500                 status = ndr_map_error2ntstatus(ndr_err);
 501                 return wrepl_request_finished(req, status);
 502         }
 503
 504         if (DEBUGLVL(10)) {
 505                 DEBUG(10,("Sending WINS packet of length %u\n",
 506                           (unsigned)blob.length));
 507                 NDR_PRINT_DEBUG(wrepl_packet, &wrap.packet);
 508         }
 509
 510         if (wrepl_socket->request_timeout > 0) {
 511                 req->te = event_add_timed(wrepl_socket->event.ctx, req,
 512                                           timeval_current_ofs(wrepl_socket->request_timeout, 0),
 513                                           wrepl_request_timeout_handler, req);
 514                 if (!req->te) return wrepl_request_finished(req, NT_STATUS_NO_MEMORY);
 515         }
 516
 517         if (ctrl && (ctrl->send_only || ctrl->disconnect_after_send)) {
 518                 struct wrepl_send_ctrl_state *s = talloc(blob.data, struct wrepl_send_ctrl_state);
 519                 if (!s) return wrepl_request_finished(req, NT_STATUS_NO_MEMORY);
 520                 s->ctrl         = *ctrl;
 521                 s->req          = req;
 522                 s->wrepl_sock   = wrepl_socket;
 523                 talloc_set_destructor(s, wrepl_send_ctrl_destructor);
 524         }
 525
 526         status = packet_send(wrepl_socket->packet, blob);
 527         if (!NT_STATUS_IS_OK(status)) {
 528                 return wrepl_request_finished(req, status);
 529         }
 530
 531         req->trigger = false;
 532         return req;
 533 }
 534
 535 /*
 536   receive a generic WINS replication reply
 537 */
 538 NTSTATUS wrepl_request_recv(struct wrepl_request *req,
 539                             TALLOC_CTX *mem_ctx,
 540                             struct wrepl_packet **packet)
 541 {
 542         NTSTATUS status = wrepl_request_wait(req);
 543         if (NT_STATUS_IS_OK(status) && packet) {
 544                 *packet = talloc_steal(mem_ctx, req->packet);
 545         }
 546         talloc_free(req);
 547         return status;
 548 }
 549
 550 /*
 551   a full WINS replication request/response
 552 */
 553 NTSTATUS wrepl_request(struct wrepl_socket *wrepl_socket,
 554                        TALLOC_CTX *mem_ctx,
 555                        struct wrepl_packet *req_packet,
 556                        struct wrepl_packet **reply_packet)
 557 {
 558         struct wrepl_request *req = wrepl_request_send(wrepl_socket, req_packet, NULL);
 559         return wrepl_request_recv(req, mem_ctx, reply_packet);
 560 }
 561
 562
 563 /*
 564   setup an association - send
 565 */
 566 struct wrepl_request *wrepl_associate_send(struct wrepl_socket *wrepl_socket,
 567                                            struct wrepl_associate *io)
 568 {
 569         struct wrepl_packet *packet;
 570         struct wrepl_request *req;
 571
 572         packet = talloc_zero(wrepl_socket, struct wrepl_packet);
 573         if (packet == NULL) return NULL;
 574
 575         packet->opcode                      = WREPL_OPCODE_BITS;
 576         packet->mess_type                   = WREPL_START_ASSOCIATION;
 577         packet->message.start.minor_version = 2;
 578         packet->message.start.major_version = 5;
 579
 580         /*
 581          * nt4 uses 41 bytes for the start_association call
 582          * so do it the same and as we don't know th emeanings of this bytes
 583          * we just send zeros and nt4, w2k and w2k3 seems to be happy with this
 584          *
 585          * if we don't do this nt4 uses an old version of the wins replication protocol
 586          * and that would break nt4 <-> samba replication
 587          */
 588         packet->padding = data_blob_talloc(packet, NULL, 21);
 589         if (packet->padding.data == NULL) {
 590                 talloc_free(packet);
 591                 return NULL;
 592         }
 593         memset(packet->padding.data, 0, packet->padding.length);
 594
 595         req = wrepl_request_send(wrepl_socket, packet, NULL);
 596
 597         talloc_free(packet);
 598
 599         return req;
 600 }
 601
 602 /*
 603   setup an association - recv
 604 */
 605 NTSTATUS wrepl_associate_recv(struct wrepl_request *req,
 606                               struct wrepl_associate *io)
 607 {
 608         struct wrepl_packet *packet=NULL;
 609         NTSTATUS status;
 610         status = wrepl_request_recv(req, req->wrepl_socket, &packet);
 611         NT_STATUS_NOT_OK_RETURN(status);
 612         if (packet->mess_type != WREPL_START_ASSOCIATION_REPLY) {
 613                 status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
 614         }
 615         if (NT_STATUS_IS_OK(status)) {
 616                 io->out.assoc_ctx = packet->message.start_reply.assoc_ctx;
 617         }
 618         talloc_free(packet);
 619         return status;
 620 }
 621
 622 /*
 623   setup an association - sync api
 624 */
 625 NTSTATUS wrepl_associate(struct wrepl_socket *wrepl_socket,
 626                          struct wrepl_associate *io)
 627 {
 628         struct wrepl_request *req = wrepl_associate_send(wrepl_socket, io);
 629         return wrepl_associate_recv(req, io);
 630 }
 631
 632
 633 /*
 634   stop an association - send
 635 */
 636 struct wrepl_request *wrepl_associate_stop_send(struct wrepl_socket *wrepl_socket,
 637                                                 struct wrepl_associate_stop *io)
 638 {
 639         struct wrepl_packet *packet;
 640         struct wrepl_request *req;
 641         struct wrepl_send_ctrl ctrl;
 642
 643         packet = talloc_zero(wrepl_socket, struct wrepl_packet);
 644         if (packet == NULL) return NULL;
 645
 646         packet->opcode                  = WREPL_OPCODE_BITS;
 647         packet->assoc_ctx               = io->in.assoc_ctx;
 648         packet->mess_type               = WREPL_STOP_ASSOCIATION;
 649         packet->message.stop.reason     = io->in.reason;
 650
 651         ZERO_STRUCT(ctrl);
 652         if (io->in.reason == 0) {
 653                 ctrl.send_only                  = true;
 654                 ctrl.disconnect_after_send      = true;
 655         }
 656
 657         req = wrepl_request_send(wrepl_socket, packet, &ctrl);
 658
 659         talloc_free(packet);
 660
 661         return req;
 662 }
 663
 664 /*
 665   stop an association - recv
 666 */
 667 NTSTATUS wrepl_associate_stop_recv(struct wrepl_request *req,
 668                                    struct wrepl_associate_stop *io)
 669 {
 670         struct wrepl_packet *packet=NULL;
 671         NTSTATUS status;
 672         status = wrepl_request_recv(req, req->wrepl_socket, &packet);
 673         NT_STATUS_NOT_OK_RETURN(status);
 674         talloc_free(packet);
 675         return status;
 676 }
 677
 678 /*
 679   setup an association - sync api
 680 */
 681 NTSTATUS wrepl_associate_stop(struct wrepl_socket *wrepl_socket,
 682                               struct wrepl_associate_stop *io)
 683 {
 684         struct wrepl_request *req = wrepl_associate_stop_send(wrepl_socket, io);
 685         return wrepl_associate_stop_recv(req, io);
 686 }
 687
 688 /*
 689   fetch the partner tables - send
 690 */
 691 struct wrepl_request *wrepl_pull_table_send(struct wrepl_socket *wrepl_socket,
 692                                             struct wrepl_pull_table *io)
 693 {
 694         struct wrepl_packet *packet;
 695         struct wrepl_request *req;
 696
 697         packet = talloc_zero(wrepl_socket, struct wrepl_packet);
 698         if (packet == NULL) return NULL;
 699
 700         packet->opcode                      = WREPL_OPCODE_BITS;
 701         packet->assoc_ctx                   = io->in.assoc_ctx;
 702         packet->mess_type                   = WREPL_REPLICATION;
 703         packet->message.replication.command = WREPL_REPL_TABLE_QUERY;
 704
 705         req = wrepl_request_send(wrepl_socket, packet, NULL);
 706
 707         talloc_free(packet);
 708
 709         return req;
 710 }
 711
 712
 713 /*
 714   fetch the partner tables - recv
 715 */
 716 NTSTATUS wrepl_pull_table_recv(struct wrepl_request *req,
 717                                TALLOC_CTX *mem_ctx,
 718                                struct wrepl_pull_table *io)
 719 {
 720         struct wrepl_packet *packet=NULL;
 721         NTSTATUS status;
 722         struct wrepl_table *table;
 723         int i;
 724
 725         status = wrepl_request_recv(req, req->wrepl_socket, &packet);
 726         NT_STATUS_NOT_OK_RETURN(status);
 727         if (packet->mess_type != WREPL_REPLICATION) {
 728                 status = NT_STATUS_NETWORK_ACCESS_DENIED;
 729         } else if (packet->message.replication.command != WREPL_REPL_TABLE_REPLY) {
 730                 status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
 731         }
 732         if (!NT_STATUS_IS_OK(status)) goto failed;
 733
 734         table = &packet->message.replication.info.table;
 735         io->out.num_partners = table->partner_count;
 736         io->out.partners = talloc_steal(mem_ctx, table->partners);
 737         for (i=0;i<io->out.num_partners;i++) {
 738                 talloc_steal(io->out.partners, io->out.partners[i].address);
 739         }
 740
 741 failed:
 742         talloc_free(packet);
 743         return status;
 744 }
 745
 746
 747 /*
 748   fetch the partner table - sync api
 749 */
 750 NTSTATUS wrepl_pull_table(struct wrepl_socket *wrepl_socket,
 751                           TALLOC_CTX *mem_ctx,
 752                           struct wrepl_pull_table *io)
 753 {
 754         struct wrepl_request *req = wrepl_pull_table_send(wrepl_socket, io);
 755         return wrepl_pull_table_recv(req, mem_ctx, io);
 756 }
 757
 758
 759 /*
 760   fetch the names for a WINS partner - send
 761 */
 762 struct wrepl_request *wrepl_pull_names_send(struct wrepl_socket *wrepl_socket,
 763                                             struct wrepl_pull_names *io)
 764 {
 765         struct wrepl_packet *packet;
 766         struct wrepl_request *req;
 767
 768         packet = talloc_zero(wrepl_socket, struct wrepl_packet);
 769         if (packet == NULL) return NULL;
 770
 771         packet->opcode                         = WREPL_OPCODE_BITS;
 772         packet->assoc_ctx                      = io->in.assoc_ctx;
 773         packet->mess_type                      = WREPL_REPLICATION;
 774         packet->message.replication.command    = WREPL_REPL_SEND_REQUEST;
 775         packet->message.replication.info.owner = io->in.partner;
 776
 777         req = wrepl_request_send(wrepl_socket, packet, NULL);
 778
 779         talloc_free(packet);
 780
 781         return req;
 782 }
 783
 784 /*
 785   fetch the names for a WINS partner - recv
 786 */
 787 NTSTATUS wrepl_pull_names_recv(struct wrepl_request *req,
 788                                TALLOC_CTX *mem_ctx,
 789                                struct wrepl_pull_names *io)
 790 {
 791         struct wrepl_packet *packet=NULL;
 792         NTSTATUS status;
 793         int i;
 794
 795         status = wrepl_request_recv(req, req->wrepl_socket, &packet);
 796         NT_STATUS_NOT_OK_RETURN(status);
 797         if (packet->mess_type != WREPL_REPLICATION ||
 798             packet->message.replication.command != WREPL_REPL_SEND_REPLY) {
 799                 status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
 800         }
 801         if (!NT_STATUS_IS_OK(status)) goto failed;
 802
 803         io->out.num_names = packet->message.replication.info.reply.num_names;
 804
 805         io->out.names = talloc_array(packet, struct wrepl_name, io->out.num_names);
 806         if (io->out.names == NULL) goto nomem;
 807
 808         /* convert the list of names and addresses to a sane format */
 809         for (i=0;i<io->out.num_names;i++) {
 810                 struct wrepl_wins_name *wname = &packet->message.replication.info.reply.names[i];
 811                 struct wrepl_name *name = &io->out.names[i];
 812
 813                 name->name      = *wname->name;
 814                 talloc_steal(io->out.names, wname->name);
 815                 name->type      = WREPL_NAME_TYPE(wname->flags);
 816                 name->state     = WREPL_NAME_STATE(wname->flags);
 817                 name->node      = WREPL_NAME_NODE(wname->flags);
 818                 name->is_static = WREPL_NAME_IS_STATIC(wname->flags);
 819                 name->raw_flags = wname->flags;
 820                 name->version_id= wname->id;
 821                 name->owner     = talloc_strdup(io->out.names, io->in.partner.address);
 822                 if (name->owner == NULL) goto nomem;
 823
 824                 /* trying to save 1 or 2 bytes on the wire isn't a good idea */
 825                 if (wname->flags & 2) {
 826                         int j;
 827
 828                         name->num_addresses = wname->addresses.addresses.num_ips;
 829                         name->addresses = talloc_array(io->out.names,
 830                                                        struct wrepl_address,
 831                                                        name->num_addresses);
 832                         if (name->addresses == NULL) goto nomem;
 833                         for (j=0;j<name->num_addresses;j++) {
 834                                 name->addresses[j].owner =
 835                                         talloc_steal(name->addresses,
 836                                                      wname->addresses.addresses.ips[j].owner);
 837                                 name->addresses[j].address =
 838                                         talloc_steal(name->addresses,
 839                                                      wname->addresses.addresses.ips[j].ip);
 840                         }
 841                 } else {
 842                         name->num_addresses = 1;
 843                         name->addresses = talloc(io->out.names, struct wrepl_address);
 844                         if (name->addresses == NULL) goto nomem;
 845                         name->addresses[0].owner = talloc_strdup(name->addresses,io->in.partner.address);
 846                         if (name->addresses[0].owner == NULL) goto nomem;
 847                         name->addresses[0].address = talloc_steal(name->addresses,
 848                                                                   wname->addresses.ip);
 849                 }
 850         }
 851
 852         talloc_steal(mem_ctx, io->out.names);
 853         talloc_free(packet);
 854         return NT_STATUS_OK;
 855 nomem:
 856         status = NT_STATUS_NO_MEMORY;
 857 failed:
 858         talloc_free(packet);
 859         return status;
 860 }
 861
 862
 863
 864 /*
 865   fetch the names for a WINS partner - sync api
 866 */
 867 NTSTATUS wrepl_pull_names(struct wrepl_socket *wrepl_socket,
 868                           TALLOC_CTX *mem_ctx,
 869                           struct wrepl_pull_names *io)
 870 {
 871         struct wrepl_request *req = wrepl_pull_names_send(wrepl_socket, io);
 872         return wrepl_pull_names_recv(req, mem_ctx, io);
 873 }