Module: RubySMB::Server::Share::Provider::Disk::Processor::Create

Included in:
RubySMB::Server::Share::Provider::Disk::Processor
Defined in:
lib/ruby_smb/server/share/provider/disk/processor/create.rb

Instance Method Summary collapse

Instance Method Details

#do_create_smb2(request) ⇒ Object 



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# File 'lib/ruby_smb/server/share/provider/disk/processor/create.rb', line 45

def do_create_smb2(request)
  unless request.create_disposition == RubySMB::Dispositions::FILE_OPEN
    logger.warn("Can not handle CREATE request for disposition: #{request.create_disposition}")
    raise NotImplementedError
  end

  # process the delayed io fields
  request.name.read_now!
  unless request.contexts_offset == 0
    request.contexts.read_now!
    request.contexts.each do |context|
      context.name.read_now!
      context.data.read_now!
    end
  end

  path = request.name.snapshot
  local_path = get_local_path(path)
  unless local_path && (local_path.file? || local_path.directory?)
    logger.warn("Requested path does not exist: #{local_path}")
    response = RubySMB::SMB2::Packet::ErrorPacket.new
    response.smb2_header.nt_status = WindowsError::NTStatus::STATUS_OBJECT_NAME_NOT_FOUND
    return response
  end

  durable = false
  response = RubySMB::SMB2::Packet::CreateResponse.new
  response.create_action = RubySMB::CreateActions::FILE_OPENED
  set_common_info(response, local_path)
  response.file_id.persistent = Zlib::crc32(path)
  response.file_id.volatile = rand(0xffffffff)

  request.contexts.each do |req_ctx|
    case req_ctx.name
    when SMB2::CreateContext::CREATE_DURABLE_HANDLE
      # see: https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-smb2/9adbc354-5fad-40e7-9a62-4a4b6c1ff8a0
      next if request.contexts.any? { |ctx| ctx.name == SMB2::CreateContext::CREATE_DURABLE_HANDLE_RECONNECT }

      if request.contexts.any? { |ctx| [ SMB2::CreateContext::CREATE_DURABLE_HANDLE_V2, SMB2::CreateContext::CREATE_DURABLE_HANDLE_RECONNECT_v2 ].include?(ctx.name) }
        response = RubySMB::SMB2::Packet::ErrorPacket.new
        response.smb2_header.nt_status = WindowsError::NTStatus::STATUS_INVALID_PARAMETER
        return response
      end

      durable = true
      res_ctx = SMB2::CreateContext::CreateDurableHandleResponse.new
    when SMB2::CreateContext::CREATE_DURABLE_HANDLE_V2
      # see: https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-smb2/33e6800a-adf5-4221-af27-7e089b9e81d1
      if request.contexts.any? { |ctx| [ SMB2::CreateContext::CREATE_DURABLE_HANDLE, SMB2::CreateContext::CREATE_DURABLE_HANDLE_RECONNECT, SMB2::CreateContext::CREATE_DURABLE_HANDLE_RECONNECT_v2 ].include?(ctx.name) }
        response = RubySMB::SMB2::Packet::ErrorPacket.new
        response.smb2_header.nt_status = WindowsError::NTStatus::STATUS_INVALID_PARAMETER
        return response
      end

      durable = true
      res_ctx = SMB2::CreateContext::CreateDurableHandleV2Response.new(
        timeout: 1000,
        flags: req_ctx.data.flags
      )
    when SMB2::CreateContext::CREATE_QUERY_MAXIMAL_ACCESS
      res_ctx = SMB2::CreateContext::CreateQueryMaximalAccessResponse.new(
        maximal_access: maximal_access(path)
      )
    when SMB2::CreateContext::CREATE_QUERY_ON_DISK_ID
      res_ctx = SMB2::CreateContext::CreateQueryOnDiskIdResponse.new(
        disk_file_id: local_path.stat.ino,
        volume_id: local_path.stat.dev
      )
    else
      logger.warn("Can not handle CREATE context: #{req_ctx.name}")
      next
    end

    response.contexts << SMB2::CreateContext::CreateContextResponse.new(name: res_ctx.class::NAME, data: res_ctx)
  end

  if response.contexts.length > 0
    # fixup the offsets
    response.contexts[0...-1].each do |ctx|
      ctx.next_offset = ctx.num_bytes
    end
    response.contexts[-1].next_offset = 0
    response.contexts_offset = response.buffer.abs_offset
    response.contexts_length = response.buffer.num_bytes
  else
    response.contexts_offset = 0
    response.contexts_length = 0
  end

  @handles[response.file_id.to_binary_s] = Handle.new(path, local_path, durable, local_path.file? ? local_path.open : nil)
  response
end

#do_nt_create_andx_smb1(request) ⇒ Object 



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# File 'lib/ruby_smb/server/share/provider/disk/processor/create.rb', line 11

def do_nt_create_andx_smb1(request)
  path = request.data_block.file_name.snapshot
  path = path.encode.gsub(/\/|\\/, File::SEPARATOR)
  path = path.delete_prefix(File::SEPARATOR)
  local_path = get_local_path(path)
  unless local_path && (local_path.file? || local_path.directory?)
    logger.warn("Requested path does not exist: #{local_path}")
    response = SMB1::Packet::EmptyPacket.new
    response.smb_header.nt_status = WindowsError::NTStatus::STATUS_NO_SUCH_FILE
    return response
  end

  response = SMB1::Packet::NtCreateAndxResponse.new
  block = response.parameter_block
  block.fid = rand(0xffff)
  # fields are slightly different so #set_common_info can't be used :(
  begin
    block.create_time = local_path.birthtime
  rescue NotImplementedError
    logger.warn("The file system does not support #birthtime for #{path}")
  end

  block.last_access_time = local_path.atime
  block.last_write_time = local_path.mtime
  block.last_change_time = local_path.ctime
  if local_path.file?
    block.end_of_file = local_path.size
    block.allocation_size = get_allocation_size(local_path)
  end

  @handles[response.parameter_block.fid] = Handle.new(path, local_path, false, local_path.file? ? local_path.open : nil)
  response
end