223 lines
6.1 KiB
Crystal
223 lines
6.1 KiB
Crystal
# require "http/server"
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require "option_parser"
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require "ipc"
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require "ipc/json"
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require "authd"
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require "baguette-crystal-base"
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require "./config"
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module DNSManager
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class Exception < ::Exception
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end
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class AuthorizationException < ::Exception
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end
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class NotLoggedException < ::Exception
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end
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class AdminAuthorizationException < ::Exception
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end
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end
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require "./storage.cr"
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require "./network.cr"
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class DNSManager::Service < IPC
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property configuration : Baguette::Configuration::DNSManager
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getter storage : DNSManager::Storage
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getter logged_users : Hash(Int32, AuthD::User::Public)
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property authd : AuthD::Client
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def initialize(@configuration, @authd_key : String)
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super()
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@storage = DNSManager::Storage.new @configuration.storage_directory, @configuration.recreate_indexes
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@logged_users = Hash(Int32, AuthD::User::Public).new
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# TODO: auth service isn't in the FDs pool.
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# If the service crashes, dnsmanagerd won't know it.
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@authd = AuthD::Client.new
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authd.key = @authd_key
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self.timer @configuration.ipc_timer
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self.service_init @configuration.service_name
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end
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def get_logged_user(event : IPC::Event)
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@logged_users[event.fd]?
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end
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def decode_token(token : String)
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@authd.decode_token token
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end
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def handle_request(event : IPC::Event)
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request_start = Time.utc
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array = event.message.not_nil!
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slice = Slice.new array.to_unsafe, array.size
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message = IPCMessage::TypedMessage.deserialize slice
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request = DNSManager.requests.parse_ipc_json message.not_nil!
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if request.nil?
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raise "unknown request type"
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end
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reqname = request.class.name.sub /^DNSManager::Request::/, ""
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Baguette::Log.debug "<< #{reqname}"
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response = DNSManager::Response::Error.new "generic error"
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begin
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response = request.handle self, event
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rescue e : AuthorizationException
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Baguette::Log.error "#{reqname} authorization error"
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response = DNSManager::Response::Error.new "authorization error"
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rescue e : AdminAuthorizationException
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Baguette::Log.error "#{reqname} no admin authorization"
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response = DNSManager::Response::Error.new "admin authorization error"
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rescue e : NotLoggedException
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Baguette::Log.error "#{reqname} user not logged"
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response = DNSManager::Response::Error.new "user not logged"
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# Do not handle generic exception case: do not provide a response.
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# rescue e # Generic case
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# Baguette::Log.error "#{reqname} generic error #{e}"
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end
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# If clients sent requests with an “id” field, it is copied
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# in the responses. Allows identifying responses easily.
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response.id = request.id
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schedule event.fd, response
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duration = Time.utc - request_start
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response_name = response.class.name.sub /^DNSManager::Response::/, ""
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if response.is_a? DNSManager::Response::Error
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Baguette::Log.warning ">> #{response_name} (#{response.reason})"
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else
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Baguette::Log.debug ">> #{response_name} (Total duration: #{duration})"
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end
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end
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def run
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Baguette::Log.title "Starting #{@configuration.service_name}"
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self.loop do |event|
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begin
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case event.type
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when LibIPC::EventType::Timer
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Baguette::Log.debug "Timer" if @configuration.print_ipc_timer
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when LibIPC::EventType::Connection
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Baguette::Log.debug "connection from #{event.fd}"
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when LibIPC::EventType::Disconnection
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Baguette::Log.debug "disconnection from #{event.fd}"
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@logged_users.delete event.fd
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when LibIPC::EventType::MessageTx
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Baguette::Log.debug "message sent to #{event.fd}"
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when LibIPC::EventType::MessageRx
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Baguette::Log.debug "message received from #{event.fd}"
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handle_request event
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else
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Baguette::Log.warning "unhandled IPC event: #{event.class}"
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if event.responds_to?(:fd)
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fd = event.fd
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Baguette::Log.warning "closing #{fd}"
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close fd
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@logged_users.delete fd
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end
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end
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rescue exception
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Baguette::Log.error "exception: #{typeof(exception)} - #{exception.message}"
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end
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end
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end
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end
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def main
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# First option parsing, same with all Baguette (service) applications.
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simulation, no_configuration, configuration_file = Baguette::Configuration.option_parser
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# Authd configuration.
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authd_configuration = if no_configuration
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Baguette::Log.info "do not load a configuration file."
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Baguette::Configuration::Auth.new
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else
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# Configuration file is for dnsmanagerd.
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Baguette::Configuration::Auth.get || Baguette::Configuration::Auth.new
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end
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if key_file = authd_configuration.shared_key_file
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authd_configuration.shared_key = File.read(key_file).chomp
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end
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# DNSManagerd configuration.
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configuration = if no_configuration
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Baguette::Log.info "do not load a configuration file."
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Baguette::Configuration::DNSManager.new
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else
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# In case there is a configuration file helping with the parameters.
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Baguette::Configuration::DNSManager.get(configuration_file) ||
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Baguette::Configuration::DNSManager.new
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end
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OptionParser.parse do |parser|
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parser.on "-v verbosity-level", "--verbosity level", "Verbosity." do |opt|
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Baguette::Log.info "Verbosity level: #{opt}"
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configuration.verbosity = opt.to_i
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end
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parser.on "-k key-file", "--key-file file", "Key file." do |opt|
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authd_configuration.shared_key = File.read(opt).chomp
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Baguette::Log.debug "Authd key: #{authd_configuration.shared_key.not_nil!}"
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end
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# IPC Service options
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parser.on "-s service_name", "--service_name service_name", "Service name (IPC)." do |service_name|
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Baguette::Log.info "Service name: #{service_name}"
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configuration.service_name = service_name
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end
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parser.on "-r storage_directory", "--root storage_directory", "Storage directory." do |storage_directory|
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Baguette::Log.info "Storage directory: #{storage_directory}"
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configuration.storage_directory = storage_directory
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end
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parser.on "-h", "--help", "Show this help" do
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puts parser
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exit 0
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end
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end
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if authd_configuration.shared_key.nil?
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Baguette::Log.error "No authd key file: cannot continue"
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exit 1
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end
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if simulation
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pp! authd_configuration, configuration
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exit 0
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end
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authd_key = authd_configuration.shared_key.not_nil!
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service = DNSManager::Service.new configuration, authd_key
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service.run
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end
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main
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