/* 

   Unix SMB/CIFS implementation.

   SMB2 client notify calls

   Copyright (C) Stefan Metzmacher 2006

   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 3 of the License, or

   (at your option) any later version.

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program.  If not, see <http://www.gnu.org/licenses/>.

*/

#include "includes.h"

#include "libcli/raw/libcliraw.h"

#include "libcli/raw/raw_proto.h"

#include "libcli/smb2/smb2.h"

#include "libcli/smb2/smb2_calls.h"

/*

  send a notify request

*/

struct smb2_request *smb2_notify_send(struct smb2_tree *tree, struct smb2_notify *io)

{

  struct smb2_request *req;

  uint32_t old_timeout;

  req = smb2_request_init_tree(tree, SMB2_OP_NOTIFY, 0x20, false, 0);

  if (req == NULL) return NULL;

  SSVAL(req->out.hdr,  SMB2_HDR_CREDIT,  0x0030);

  SSVAL(req->out.body, 0x02, io->in.recursive);

  SIVAL(req->out.body, 0x04, io->in.buffer_size);

  smb2_push_handle(req->out.body+0x08, &io->in.file.handle);

  SIVAL(req->out.body, 0x18, io->in.completion_filter);

  SIVAL(req->out.body, 0x1C, io->in.unknown);

  req->credit_charge = (MAX(io->in.buffer_size, 1) - 1)/ 65536 + 1;

  old_timeout = req->transport->options.request_timeout;

  req->transport->options.request_timeout = 0;

  smb2_transport_send(req);

  req->transport->options.request_timeout = old_timeout;

  return req;

}

/*

  recv a notify reply

*/

NTSTATUS smb2_notify_recv(struct smb2_request *req, TALLOC_CTX *mem_ctx,

        struct smb2_notify *io)

{

  NTSTATUS status;

  DATA_BLOB blob;

  uint32_t ofs, i;

  if (!smb2_request_receive(req) || 

      !smb2_request_is_ok(req)) {

    return smb2_request_destroy(req);

  }

  SMB2_CHECK_PACKET_RECV(req, 0x08, true);

  status = smb2_pull_o16s32_blob(&req->in, mem_ctx, req->in.body+0x02, &blob);

  if (!NT_STATUS_IS_OK(status)) {

    return status;

  }

  io->out.changes = NULL;

  io->out.num_changes = 0;

  /* count them */

  for (ofs=0; blob.length - ofs > 12; ) {

    uint32_t next = IVAL(blob.data, ofs);

    io->out.num_changes++;

    if (next == 0 || (ofs + next) >= blob.length) break;

    ofs += next;

  }

  /* allocate array */

  io->out.changes = talloc_array(mem_ctx, struct notify_changes, io->out.num_changes);

  if (!io->out.changes) {

    return NT_STATUS_NO_MEMORY;

  }

  for (i=ofs=0; i<io->out.num_changes; i++) {

    io->out.changes[i].action = IVAL(blob.data, ofs+4);

    smbcli_blob_pull_string(NULL, mem_ctx, &blob,

          &io->out.changes[i].name,

          ofs+8, ofs+12, STR_UNICODE);

    ofs += IVAL(blob.data, ofs);

  }

  return smb2_request_destroy(req);

}

/*

  sync notify request

*/

NTSTATUS smb2_notify(struct smb2_tree *tree, TALLOC_CTX *mem_ctx,

         struct smb2_notify *io)

{

  struct smb2_request *req = smb2_notify_send(tree, io);

  return smb2_notify_recv(req, mem_ctx, io);

}