source4/smb_server/smb2/receive.c

   1 /*
   2    Unix SMB2 implementation.
   3
   4    Copyright (C) Andrew Tridgell        2005
   5    Copyright (C) Stefan Metzmacher      2005
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "system/time.h"
  23 #include "libcli/smb2/smb2.h"
  24 #include "libcli/smb2/smb2_calls.h"
  25 #include "smb_server/smb_server.h"
  26 #include "smb_server/service_smb_proto.h"
  27 #include "smb_server/smb2/smb2_server.h"
  28 #include "smbd/service_stream.h"
  29 #include "lib/stream/packet.h"
  30 #include "ntvfs/ntvfs.h"
  31 #include "param/param.h"
  32 #include "auth/gensec/gensec.h"
  33 #include "auth/auth.h"
  34
  35
  36 /* fill in the bufinfo */
  37 void smb2srv_setup_bufinfo(struct smb2srv_request *req)
  38 {
  39         req->in.bufinfo.mem_ctx    = req;
  40         req->in.bufinfo.flags      = BUFINFO_FLAG_UNICODE | BUFINFO_FLAG_SMB2;
  41         req->in.bufinfo.align_base = req->in.buffer;
  42         if (req->in.dynamic) {
  43                 req->in.bufinfo.data       = req->in.dynamic;
  44                 req->in.bufinfo.data_size  = req->in.body_size - req->in.body_fixed;
  45         } else {
  46                 req->in.bufinfo.data       = NULL;
  47                 req->in.bufinfo.data_size  = 0;
  48         }
  49 }
  50
  51 static int smb2srv_request_destructor(struct smb2srv_request *req)
  52 {
  53         DLIST_REMOVE(req->smb_conn->requests2.list, req);
  54         if (req->pending_id) {
  55                 idr_remove(req->smb_conn->requests2.idtree_req, req->pending_id);
  56         }
  57         return 0;
  58 }
  59
  60 static int smb2srv_request_deny_destructor(struct smb2srv_request *req)
  61 {
  62         return -1;
  63 }
  64
  65 struct smb2srv_request *smb2srv_init_request(struct smbsrv_connection *smb_conn)
  66 {
  67         struct smb2srv_request *req;
  68
  69         req = talloc_zero(smb_conn, struct smb2srv_request);
  70         if (!req) return NULL;
  71
  72         req->smb_conn = smb_conn;
  73
  74         talloc_set_destructor(req, smb2srv_request_destructor);
  75
  76         return req;
  77 }
  78
  79 NTSTATUS smb2srv_setup_reply(struct smb2srv_request *req, uint16_t body_fixed_size,
  80                              bool body_dynamic_present, uint32_t body_dynamic_size)
  81 {
  82         uint32_t flags = 0x00000001;
  83         uint32_t pid = IVAL(req->in.hdr, SMB2_HDR_PID);
  84         uint32_t tid = IVAL(req->in.hdr, SMB2_HDR_TID);
  85
  86         if (req->pending_id) {
  87                 flags |= 0x00000002;
  88                 pid = req->pending_id;
  89                 tid = 0;
  90         }
  91
  92         if (body_dynamic_present) {
  93                 if (body_dynamic_size == 0) {
  94                         body_dynamic_size = 1;
  95                 }
  96         } else {
  97                 body_dynamic_size = 0;
  98         }
  99
 100         req->out.size           = SMB2_HDR_BODY+NBT_HDR_SIZE+body_fixed_size;
 101
 102         req->out.allocated      = req->out.size + body_dynamic_size;
 103         req->out.buffer         = talloc_array(req, uint8_t,
 104                                                req->out.allocated);
 105         NT_STATUS_HAVE_NO_MEMORY(req->out.buffer);
 106
 107         req->out.hdr            = req->out.buffer       + NBT_HDR_SIZE;
 108         req->out.body           = req->out.hdr          + SMB2_HDR_BODY;
 109         req->out.body_fixed     = body_fixed_size;
 110         req->out.body_size      = body_fixed_size;
 111         req->out.dynamic        = (body_dynamic_size ? req->out.body + body_fixed_size : NULL);
 112
 113         SIVAL(req->out.hdr, 0,                          SMB2_MAGIC);
 114         SSVAL(req->out.hdr, SMB2_HDR_LENGTH,            SMB2_HDR_BODY);
 115         SSVAL(req->out.hdr, SMB2_HDR_EPOCH,             0);
 116         SIVAL(req->out.hdr, SMB2_HDR_STATUS,            NT_STATUS_V(req->status));
 117         SSVAL(req->out.hdr, SMB2_HDR_OPCODE,            SVAL(req->in.hdr, SMB2_HDR_OPCODE));
 118         SSVAL(req->out.hdr, SMB2_HDR_CREDIT,            0x0001);
 119         SIVAL(req->out.hdr, SMB2_HDR_FLAGS,             flags);
 120         SIVAL(req->out.hdr, SMB2_HDR_NEXT_COMMAND,      0);
 121         SBVAL(req->out.hdr, SMB2_HDR_MESSAGE_ID,        req->seqnum);
 122         SIVAL(req->out.hdr, SMB2_HDR_PID,               pid);
 123         SIVAL(req->out.hdr, SMB2_HDR_TID,               tid);
 124         SBVAL(req->out.hdr, SMB2_HDR_SESSION_ID,        BVAL(req->in.hdr, SMB2_HDR_SESSION_ID));
 125         memset(req->out.hdr+SMB2_HDR_SIGNATURE, 0, 16);
 126
 127         /* set the length of the fixed body part and +1 if there's a dynamic part also */
 128         SSVAL(req->out.body, 0, body_fixed_size + (body_dynamic_size?1:0));
 129
 130         /*
 131          * if we have a dynamic part, make sure the first byte
 132          * which is always be part of the packet is initialized
 133          */
 134         if (body_dynamic_size) {
 135                 req->out.size += 1;
 136                 SCVAL(req->out.dynamic, 0, 0);
 137         }
 138
 139         return NT_STATUS_OK;
 140 }
 141
 142 static NTSTATUS smb2srv_reply(struct smb2srv_request *req);
 143
 144 static void smb2srv_chain_reply(struct smb2srv_request *p_req)
 145 {
 146         NTSTATUS status;
 147         struct smb2srv_request *req;
 148         uint32_t chain_offset;
 149         uint32_t protocol_version;
 150         uint16_t buffer_code;
 151         uint32_t dynamic_size;
 152
 153         chain_offset = p_req->chain_offset;
 154         p_req->chain_offset = 0;
 155
 156         if (p_req->in.size < (NBT_HDR_SIZE + chain_offset + SMB2_MIN_SIZE)) {
 157                 DEBUG(2,("Invalid SMB2 chained packet at offset 0x%X\n",
 158                         chain_offset));
 159                 smbsrv_terminate_connection(p_req->smb_conn, "Invalid SMB2 chained packet");
 160                 return;
 161         }
 162
 163         protocol_version = IVAL(p_req->in.buffer, NBT_HDR_SIZE + chain_offset);
 164         if (protocol_version != SMB2_MAGIC) {
 165                 DEBUG(2,("Invalid SMB chained packet: protocol prefix: 0x%08X\n",
 166                          protocol_version));
 167                 smbsrv_terminate_connection(p_req->smb_conn, "NON-SMB2 chained packet");
 168                 return;
 169         }
 170
 171         req = smb2srv_init_request(p_req->smb_conn);
 172         if (!req) {
 173                 smbsrv_terminate_connection(p_req->smb_conn, "SMB2 chained packet - no memory");
 174                 return;
 175         }
 176
 177         req->in.buffer          = talloc_steal(req, p_req->in.buffer);
 178         req->in.size            = p_req->in.size;
 179         req->request_time       = p_req->request_time;
 180         req->in.allocated       = req->in.size;
 181
 182         req->in.hdr             = req->in.buffer+ NBT_HDR_SIZE + chain_offset;
 183         req->in.body            = req->in.hdr   + SMB2_HDR_BODY;
 184         req->in.body_size       = req->in.size  - (NBT_HDR_SIZE+ chain_offset + SMB2_HDR_BODY);
 185         req->in.dynamic         = NULL;
 186
 187         buffer_code             = SVAL(req->in.body, 0);
 188         req->in.body_fixed      = (buffer_code & ~1);
 189         dynamic_size            = req->in.body_size - req->in.body_fixed;
 190
 191         if (dynamic_size != 0 && (buffer_code & 1)) {
 192                 req->in.dynamic = req->in.body + req->in.body_fixed;
 193                 if (smb2_oob(&req->in, req->in.dynamic, dynamic_size)) {
 194                         DEBUG(1,("SMB2 chained request invalid dynamic size 0x%x\n",
 195                                  dynamic_size));
 196                         smb2srv_send_error(req, NT_STATUS_INVALID_PARAMETER);
 197                         return;
 198                 }
 199         }
 200
 201         smb2srv_setup_bufinfo(req);
 202
 203         if (p_req->chained_file_handle) {
 204                 memcpy(req->_chained_file_handle,
 205                        p_req->_chained_file_handle,
 206                        sizeof(req->_chained_file_handle));
 207                 req->chained_file_handle = req->_chained_file_handle;
 208         }
 209
 210         /*
 211          * TODO: - make sure the length field is 64
 212          *       - make sure it's a request
 213          */
 214
 215         status = smb2srv_reply(req);
 216         if (!NT_STATUS_IS_OK(status)) {
 217                 smbsrv_terminate_connection(req->smb_conn, nt_errstr(status));
 218                 talloc_free(req);
 219                 return;
 220         }
 221 }
 222
 223 void smb2srv_send_reply(struct smb2srv_request *req)
 224 {
 225         DATA_BLOB blob;
 226         NTSTATUS status;
 227
 228         if (req->smb_conn->connection->event.fde == NULL) {
 229                 /* the socket has been destroyed - no point trying to send a reply! */
 230                 talloc_free(req);
 231                 return;
 232         }
 233
 234         if (req->out.size > NBT_HDR_SIZE) {
 235                 _smb2_setlen(req->out.buffer, req->out.size - NBT_HDR_SIZE);
 236         }
 237
 238         /* if the request was signed or doing_signing is true, then we
 239            must sign the reply */
 240         if (req->session &&
 241             (req->smb_conn->doing_signing ||
 242              (IVAL(req->in.hdr, SMB2_HDR_FLAGS) & SMB2_HDR_FLAG_SIGNED))) {
 243                 status = smb2_sign_message(&req->out,
 244                                            req->session->session_info->session_key);
 245                 if (!NT_STATUS_IS_OK(status)) {
 246                         smbsrv_terminate_connection(req->smb_conn, nt_errstr(status));
 247                         return;
 248                 }
 249         }
 250
 251
 252         blob = data_blob_const(req->out.buffer, req->out.size);
 253         status = packet_send(req->smb_conn->packet, blob);
 254         if (!NT_STATUS_IS_OK(status)) {
 255                 smbsrv_terminate_connection(req->smb_conn, nt_errstr(status));
 256         }
 257         if (req->chain_offset) {
 258                 smb2srv_chain_reply(req);
 259                 return;
 260         }
 261         talloc_free(req);
 262 }
 263
 264 void smb2srv_send_error(struct smb2srv_request *req, NTSTATUS error)
 265 {
 266         NTSTATUS status;
 267
 268         if (req->smb_conn->connection->event.fde == NULL) {
 269                 /* the socket has been destroyed - no point trying to send an error! */
 270                 talloc_free(req);
 271                 return;
 272         }
 273
 274         status = smb2srv_setup_reply(req, 8, true, 0);
 275         if (!NT_STATUS_IS_OK(status)) {
 276                 smbsrv_terminate_connection(req->smb_conn, nt_errstr(status));
 277                 talloc_free(req);
 278                 return;
 279         }
 280
 281         SIVAL(req->out.hdr, SMB2_HDR_STATUS, NT_STATUS_V(error));
 282
 283         SSVAL(req->out.body, 0x02, 0);
 284         SIVAL(req->out.body, 0x04, 0);
 285
 286         smb2srv_send_reply(req);
 287 }
 288
 289 static NTSTATUS smb2srv_reply(struct smb2srv_request *req)
 290 {
 291         uint16_t opcode;
 292         uint32_t tid;
 293         uint64_t uid;
 294         uint32_t flags;
 295
 296         opcode                  = SVAL(req->in.hdr, SMB2_HDR_OPCODE);
 297         req->chain_offset       = IVAL(req->in.hdr, SMB2_HDR_NEXT_COMMAND);
 298         req->seqnum             = BVAL(req->in.hdr, SMB2_HDR_MESSAGE_ID);
 299         tid                     = IVAL(req->in.hdr, SMB2_HDR_TID);
 300         uid                     = BVAL(req->in.hdr, SMB2_HDR_SESSION_ID);
 301         flags                   = IVAL(req->in.hdr, SMB2_HDR_FLAGS);
 302
 303         req->session    = smbsrv_session_find(req->smb_conn, uid, req->request_time);
 304         req->tcon       = smbsrv_smb2_tcon_find(req->session, tid, req->request_time);
 305
 306         errno = 0;
 307
 308         /* supporting signing is mandatory in SMB2, and is per-packet. So we
 309            should check the signature on any incoming packet that is signed, and
 310            should give a signed reply to any signed request */
 311         if (flags & SMB2_HDR_FLAG_SIGNED) {
 312                 NTSTATUS status;
 313                 if (req->session == NULL) {
 314                         /* we can't check signing with no session */
 315                         smb2srv_send_error(req, NT_STATUS_ACCESS_DENIED);
 316                         return NT_STATUS_OK;
 317                 }
 318                 status = smb2_check_signature(&req->in,
 319                                               req->session->session_info->session_key);
 320                 if (!NT_STATUS_IS_OK(status)) {
 321                         smb2srv_send_error(req, status);
 322                         return NT_STATUS_OK;
 323                 }
 324         } else if (req->smb_conn->doing_signing && req->session != NULL) {
 325                 /* we require signing and this request was not signed */
 326                 smb2srv_send_error(req, NT_STATUS_ACCESS_DENIED);
 327                 return NT_STATUS_OK;
 328         }
 329
 330         /* TODO: check the seqnum */
 331
 332         switch (opcode) {
 333         case SMB2_OP_NEGPROT:
 334                 smb2srv_negprot_recv(req);
 335                 return NT_STATUS_OK;
 336         case SMB2_OP_SESSSETUP:
 337                 smb2srv_sesssetup_recv(req);
 338                 return NT_STATUS_OK;
 339         case SMB2_OP_LOGOFF:
 340                 if (!req->session) goto nosession;
 341                 smb2srv_logoff_recv(req);
 342                 return NT_STATUS_OK;
 343         case SMB2_OP_TCON:
 344                 if (!req->session) goto nosession;
 345                 smb2srv_tcon_recv(req);
 346                 return NT_STATUS_OK;
 347         case SMB2_OP_TDIS:
 348                 if (!req->session) goto nosession;
 349                 if (!req->tcon) goto notcon;
 350                 smb2srv_tdis_recv(req);
 351                 return NT_STATUS_OK;
 352         case SMB2_OP_CREATE:
 353                 if (!req->session) goto nosession;
 354                 if (!req->tcon) goto notcon;
 355                 smb2srv_create_recv(req);
 356                 return NT_STATUS_OK;
 357         case SMB2_OP_CLOSE:
 358                 if (!req->session) goto nosession;
 359                 if (!req->tcon) goto notcon;
 360                 smb2srv_close_recv(req);
 361                 return NT_STATUS_OK;
 362         case SMB2_OP_FLUSH:
 363                 if (!req->session) goto nosession;
 364                 if (!req->tcon) goto notcon;
 365                 smb2srv_flush_recv(req);
 366                 return NT_STATUS_OK;
 367         case SMB2_OP_READ:
 368                 if (!req->session) goto nosession;
 369                 if (!req->tcon) goto notcon;
 370                 smb2srv_read_recv(req);
 371                 return NT_STATUS_OK;
 372         case SMB2_OP_WRITE:
 373                 if (!req->session) goto nosession;
 374                 if (!req->tcon) goto notcon;
 375                 smb2srv_write_recv(req);
 376                 return NT_STATUS_OK;
 377         case SMB2_OP_LOCK:
 378                 if (!req->session) goto nosession;
 379                 if (!req->tcon) goto notcon;
 380                 smb2srv_lock_recv(req);
 381                 return NT_STATUS_OK;
 382         case SMB2_OP_IOCTL:
 383                 if (!req->session) goto nosession;
 384                 if (!req->tcon) goto notcon;
 385                 smb2srv_ioctl_recv(req);
 386                 return NT_STATUS_OK;
 387         case SMB2_OP_CANCEL:
 388                 smb2srv_cancel_recv(req);
 389                 return NT_STATUS_OK;
 390         case SMB2_OP_KEEPALIVE:
 391                 smb2srv_keepalive_recv(req);
 392                 return NT_STATUS_OK;
 393         case SMB2_OP_FIND:
 394                 if (!req->session) goto nosession;
 395                 if (!req->tcon) goto notcon;
 396                 smb2srv_find_recv(req);
 397                 return NT_STATUS_OK;
 398         case SMB2_OP_NOTIFY:
 399                 if (!req->session) goto nosession;
 400                 if (!req->tcon) goto notcon;
 401                 smb2srv_notify_recv(req);
 402                 return NT_STATUS_OK;
 403         case SMB2_OP_GETINFO:
 404                 if (!req->session) goto nosession;
 405                 if (!req->tcon) goto notcon;
 406                 smb2srv_getinfo_recv(req);
 407                 return NT_STATUS_OK;
 408         case SMB2_OP_SETINFO:
 409                 if (!req->session) goto nosession;
 410                 if (!req->tcon) goto notcon;
 411                 smb2srv_setinfo_recv(req);
 412                 return NT_STATUS_OK;
 413         case SMB2_OP_BREAK:
 414                 if (!req->session) goto nosession;
 415                 if (!req->tcon) goto notcon;
 416                 smb2srv_break_recv(req);
 417                 return NT_STATUS_OK;
 418         }
 419
 420         DEBUG(1,("Invalid SMB2 opcode: 0x%04X\n", opcode));
 421         smbsrv_terminate_connection(req->smb_conn, "Invalid SMB2 opcode");
 422         return NT_STATUS_OK;
 423
 424 nosession:
 425         smb2srv_send_error(req, NT_STATUS_USER_SESSION_DELETED);
 426         return NT_STATUS_OK;
 427 notcon:
 428         smb2srv_send_error(req, NT_STATUS_NETWORK_NAME_DELETED);
 429         return NT_STATUS_OK;
 430 }
 431
 432 NTSTATUS smbsrv_recv_smb2_request(void *private, DATA_BLOB blob)
 433 {
 434         struct smbsrv_connection *smb_conn = talloc_get_type(private, struct smbsrv_connection);
 435         struct smb2srv_request *req;
 436         struct timeval cur_time = timeval_current();
 437         uint32_t protocol_version;
 438         uint16_t buffer_code;
 439         uint32_t dynamic_size;
 440
 441         smb_conn->statistics.last_request_time = cur_time;
 442
 443         /* see if its a special NBT packet */
 444         if (CVAL(blob.data,0) != 0) {
 445                 DEBUG(2,("Special NBT packet on SMB2 connection"));
 446                 smbsrv_terminate_connection(smb_conn, "Special NBT packet on SMB2 connection");
 447                 return NT_STATUS_OK;
 448         }
 449
 450         if (blob.length < (NBT_HDR_SIZE + SMB2_MIN_SIZE)) {
 451                 DEBUG(2,("Invalid SMB2 packet length count %ld\n", (long)blob.length));
 452                 smbsrv_terminate_connection(smb_conn, "Invalid SMB2 packet");
 453                 return NT_STATUS_OK;
 454         }
 455
 456         protocol_version = IVAL(blob.data, NBT_HDR_SIZE);
 457         if (protocol_version != SMB2_MAGIC) {
 458                 DEBUG(2,("Invalid SMB packet: protocol prefix: 0x%08X\n",
 459                          protocol_version));
 460                 smbsrv_terminate_connection(smb_conn, "NON-SMB2 packet");
 461                 return NT_STATUS_OK;
 462         }
 463
 464         req = smb2srv_init_request(smb_conn);
 465         NT_STATUS_HAVE_NO_MEMORY(req);
 466
 467         req->in.buffer          = talloc_steal(req, blob.data);
 468         req->in.size            = blob.length;
 469         req->request_time       = cur_time;
 470         req->in.allocated       = req->in.size;
 471
 472         req->in.hdr             = req->in.buffer+ NBT_HDR_SIZE;
 473         req->in.body            = req->in.hdr   + SMB2_HDR_BODY;
 474         req->in.body_size       = req->in.size  - (SMB2_HDR_BODY+NBT_HDR_SIZE);
 475         req->in.dynamic         = NULL;
 476
 477         buffer_code             = SVAL(req->in.body, 0);
 478         req->in.body_fixed      = (buffer_code & ~1);
 479         dynamic_size            = req->in.body_size - req->in.body_fixed;
 480
 481         if (dynamic_size != 0 && (buffer_code & 1)) {
 482                 req->in.dynamic = req->in.body + req->in.body_fixed;
 483                 if (smb2_oob(&req->in, req->in.dynamic, dynamic_size)) {
 484                         DEBUG(1,("SMB2 request invalid dynamic size 0x%x\n",
 485                                  dynamic_size));
 486                         smb2srv_send_error(req, NT_STATUS_INVALID_PARAMETER);
 487                         return NT_STATUS_OK;
 488                 }
 489         }
 490
 491         smb2srv_setup_bufinfo(req);
 492
 493         /*
 494          * TODO: - make sure the length field is 64
 495          *       - make sure it's a request
 496          */
 497
 498         return smb2srv_reply(req);
 499 }
 500
 501 static NTSTATUS smb2srv_init_pending(struct smbsrv_connection *smb_conn)
 502 {
 503         smb_conn->requests2.idtree_req = idr_init(smb_conn);
 504         NT_STATUS_HAVE_NO_MEMORY(smb_conn->requests2.idtree_req);
 505         smb_conn->requests2.idtree_limit        = 0x00FFFFFF & (UINT32_MAX - 1);
 506         smb_conn->requests2.list                = NULL;
 507
 508         return NT_STATUS_OK;
 509 }
 510
 511 NTSTATUS smb2srv_queue_pending(struct smb2srv_request *req)
 512 {
 513         int id;
 514
 515         if (req->pending_id) {
 516                 return NT_STATUS_INTERNAL_ERROR;
 517         }
 518
 519         id = idr_get_new_above(req->smb_conn->requests2.idtree_req, req,
 520                                1, req->smb_conn->requests2.idtree_limit);
 521         if (id == -1) {
 522                 return NT_STATUS_INSUFFICIENT_RESOURCES;
 523         }
 524
 525         DLIST_ADD_END(req->smb_conn->requests2.list, req, struct smb2srv_request *);
 526         req->pending_id = id;
 527
 528         talloc_set_destructor(req, smb2srv_request_deny_destructor);
 529         smb2srv_send_error(req, STATUS_PENDING);
 530         talloc_set_destructor(req, smb2srv_request_destructor);
 531
 532         return NT_STATUS_OK;
 533 }
 534
 535 void smb2srv_cancel_recv(struct smb2srv_request *req)
 536 {
 537         uint32_t pending_id;
 538         uint32_t flags;
 539         void *p;
 540         struct smb2srv_request *r;
 541
 542         if (!req->session) goto done;
 543
 544         flags           = IVAL(req->in.hdr, SMB2_HDR_FLAGS);
 545         pending_id      = IVAL(req->in.hdr, SMB2_HDR_PID);
 546
 547         if (!(flags & 0x00000002)) {
 548                 /* TODO: what to do here? */
 549                 goto done;
 550         }
 551
 552         p = idr_find(req->smb_conn->requests2.idtree_req, pending_id);
 553         if (!p) goto done;
 554
 555         r = talloc_get_type(p, struct smb2srv_request);
 556         if (!r) goto done;
 557
 558         if (!r->ntvfs) goto done;
 559
 560         ntvfs_cancel(r->ntvfs);
 561
 562 done:
 563         /* we never generate a reply for a SMB2 Cancel */
 564         talloc_free(req);
 565 }
 566
 567 /*
 568  * init the SMB2 protocol related stuff
 569  */
 570 NTSTATUS smbsrv_init_smb2_connection(struct smbsrv_connection *smb_conn)
 571 {
 572         NTSTATUS status;
 573
 574         /* now initialise a few default values associated with this smb socket */
 575         smb_conn->negotiate.max_send = 0xFFFF;
 576
 577         /* this is the size that w2k uses, and it appears to be important for
 578            good performance */
 579         smb_conn->negotiate.max_recv = lp_max_xmit(smb_conn->lp_ctx);
 580
 581         smb_conn->negotiate.zone_offset = get_time_zone(time(NULL));
 582
 583         smb_conn->config.security = SEC_USER;
 584         smb_conn->config.nt_status_support = true;
 585
 586         status = smbsrv_init_sessions(smb_conn, UINT64_MAX);
 587         NT_STATUS_NOT_OK_RETURN(status);
 588
 589         status = smb2srv_init_pending(smb_conn);
 590         NT_STATUS_NOT_OK_RETURN(status);
 591
 592         return NT_STATUS_OK;
 593
 594 }