Class: OsCtld::SendReceive::Commands::ReceiveSkel

Inherits:
Base show all
Includes:
OsCtl::Lib::Utils::Log, OsCtl::Lib::Utils::System
Defined in:
lib/osctld/send_receive/commands/receive_skel.rb

Instance Attribute Summary

Attributes inherited from Commands::Base

#client, #client_handler, #id, #opts

Instance Method Summary collapse

Methods inherited from Base

handle

Methods inherited from Commands::Base

#base_execute, #call_cmd, #call_cmd!, #error, #error!, handle, #handled, #indirect?, #initialize, #manipulate, #manipulation_holder, #ok, #progress, #request_stop, run, run!

Constructor Details

This class inherits a constructor from OsCtld::Commands::Base

Instance Method Details

#execute ⇒ Object 



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# File 'lib/osctld/send_receive/commands/receive_skel.rb', line 12

def execute
  client.send("#{{ status: true, response: 'continue' }.to_json}\n", 0)

  io = client.recv_io
  f = Tempfile.open('ct-skel')
  f.write(io.read(32 * 1024)) until io.eof?

  f.seek(0)

  # sshd will use the first key that matches to accept the client. However,
  # one key can be authorized multiple times, either on different pools,
  # or even within the same pool, but with a different passphrase. We must
  # therefore find the matching key and target pool.
  pool, auth_key = find_pool_and_key

  error!('the pool is disabled') unless pool.active?

  importer = Container::Importer.new(pool, f)
  data = importer.load_metadata
  token = nil

  if data['type'] != 'skel'
    error!("expected archive type to be 'skel', got '#{data['type']}'")
  end

  ct = importer.load_ct(ct_opts: { staged: true, devices: false })

  if auth_key.ctid && !File.fnmatch?(auth_key.ctid, ct.id)
    error!('access denied: invalid container id')
  end

  ct.manipulate(self) do
    builder = Container::Builder.new(ct.get_run_conf)

    unless builder.valid?
      error!("invalid id, allowed format: #{builder.id_chars}")
    end

    begin
      ct.devices.check_all_available!
    rescue DeviceNotAvailable, DeviceModeInsufficient => e
      error!(e.message)
    end

    unless builder.register
      error!("container #{pool.name}:#{ct.id} already exists")
    end

    ct.devices.init
    ct.mounts.prune

    importer.create_datasets(builder, accept_existing: true)

    # Unmount all datasets before transfers
    ct.datasets.reverse.each { |ds| zfs(:umount, '', ds.name, valid_rcs: [1]) }

    builder.setup_lxc_home

    SendReceive.started_using_key(pool, auth_key.name)
    token = SendReceive::Tokens.get
    ct.open_send_log(
      :destination,
      token,
      key_name: auth_key.name
    )

    builder.setup_lxc_configs
    builder.setup_log_file
    builder.setup_user_hook_script_dir
    importer.install_user_hook_scripts(ct)
    builder.monitor

    if ct.netifs.any?
      call_cmd(Commands::User::LxcUsernet)
    end
  end

  # Pass the token to the sender
  ok(token)
ensure
  f.close
  f.unlink
end

#find_pool_and_key ⇒ Object (protected) 



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# File 'lib/osctld/send_receive/commands/receive_skel.rb', line 98

def find_pool_and_key
  key_pool = DB::Pools.find(opts[:key_pool])
  error!('pool not found') unless key_pool

  auth_key = key_pool.send_receive_key_chain.get_key(opts[:key_name])
  error!('invalid authentication key') unless auth_key

  log(:info, "Authenticated using key #{key_pool.name}:#{auth_key.name}")

  to_pool = DB::Pools.find(opts[:pool] || opts[:key_pool])
  error!('pool not found') unless to_pool

  ptr = get_ptr(opts[:client_ip])
  log(:info, "Client IP #{opts[:client_ip]}, PTR #{ptr || 'not found'}")

  actual_key = to_pool.send_receive_key_chain.find_key(
    auth_key.pubkey,
    [opts[:client_ip], ptr].compact,
    opts[:passphrase]
  )
  error!('invalid authentication key') unless actual_key

  log(:info, "Found matching key #{to_pool.name}:#{actual_key.name}")

  if actual_key.single_use? && actual_key.in_use?
    log(:info, 'Key already in use')
    error!('invalid authentication key')
  end

  [to_pool, actual_key]
end

#get_ptr(addr) ⇒ Object (protected) 



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# File 'lib/osctld/send_receive/commands/receive_skel.rb', line 130

def get_ptr(addr)
  Resolv.getname(addr)
rescue Resolv::ResolvError
  nil
end