Minor grooming.

shard.yml

@@ -1,5 +1,5 @@
 name: ipcd
-version: 0.6.0 # should follow libipc and ipc.cr bindings versions.
+version: 0.7.0 # should follow libipc and ipc.cr bindings versions.
 
 authors:
     - karchnu <karchnu@karchnu.fr>
@@ -10,13 +10,20 @@ description: |
 dependencies:
     ipc:
         git: https://git.baguette.netlib.re/Baguette/ipc.cr
-        branch: poll
+        branch: master
+    baguette-crystal-base:
+        git: https://git.baguette.netlib.re/Baguette/baguette-crystal-base
+        branch: master
 
 targets:
     websocketd:
         main: src/websocketd.cr
+    websocketd-dev:
+        main: src/websocketd-dev.cr
     websocketc:
         main: src/websocketc.cr
+    oldwsc:
+        main: src/old-websocketc.cr
 
     # tests
     test-ws-pong:

src/instance_storage.cr

@@ -0,0 +1,26 @@
+# Link between fd and TCPSocket, WebSocket and IPC::Connection instances.
+class InstanceStorage
+	property is_json : Hash(Int32, Bool)
+	property fd_to_websocket : Hash(Int32, WebSocket)
+
+	# So the GC won't close it.
+	property fd_to_socket : Hash(Int32, TCPSocket)
+
+	def initialize
+		@is_json = Hash(Int32,Bool).new
+		@fd_to_websocket = Hash(Int32, WebSocket).new
+		@fd_to_socket = Hash(Int32, TCPSocket).new
+	end
+
+	def remove_fd (fdclient : Int32)
+		puts "#{CBLUE}closing the client:#{CRESET} #{fdclient}"
+		# 1. remove the client and the service from is_json
+		@is_json.select! do |fd,v| fd != fdclient end
+
+		# 2. remove the client from fd_to_websocket
+		@fd_to_websocket.select! do |fd, ws| fd != fdclient end
+
+		# 3. remove the client from fd_to_socket
+		@fd_to_socket.select! do |fd, ws| fd != fdclient end
+	end
+end

src/lib_modifications.cr

@@ -38,7 +38,14 @@ class HTTP::WebSocket
   record Pong
   record Close
   record Error
-  record NotFinal
+  # record NotFinal
+
+  struct NotFinal
+    property message : String
+    property info    : Protocol::PacketInfo
+    def initialize(@message, @info)
+    end
+  end
 
   # :nodoc:
   def run_once : Bytes | String | Close | Ping | Pong | NotFinal | Error
@@ -73,6 +80,8 @@ class HTTP::WebSocket
         @on_message.try &.call(@current_message.to_s)
         @current_message.clear
         return String.new message
+      else
+        return NotFinal.new String.new(message), info
       end
     when Protocol::Opcode::BINARY
       message = @buffer[0, info.size]
@@ -93,7 +102,7 @@ class HTTP::WebSocket
       end
     end
 
-    return NotFinal.new
+    raise "what the fuck?"
   end
 
   # Returns the websocket instance.

src/network.cr

@@ -0,0 +1,31 @@
+require "ipc"
+require "json"
+require "ipc/json"
+
+class IPC::JSON
+	def handle(service : IPC::Server, event : IPC::Event::Events)
+		raise "unimplemented"
+	end
+end
+
+module Websocketc
+	class_getter requests  = [] of IPC::JSON.class
+	class_getter responses = [] of IPC::JSON.class
+end
+
+
+class Websocketc::Response
+	IPC::JSON.message Error, 0 do
+		property reason : String | Array(String)
+
+		def initialize(@reason)
+		end
+	end
+	IPC::JSON.message Success, 1 do
+		def initialize
+		end
+	end
+end
+
+require "./requests/*"
+

src/old-websocketc.cr

@@ -0,0 +1,83 @@
+require "http/web_socket"
+require "option_parser"
+
+require "ipc"
+require "./colors"
+require "./utils"
+require "./lib_modifications.cr"
+
+class CLI
+	class_property uri = "ws://localhost:1234/pong"
+	class_property rounds = 1
+end
+
+OptionParser.parse do |parser|
+	parser.on "-u uri", "--uri uri", "URI" do |opturi|
+		CLI.uri = opturi
+	end
+
+	parser.on "-r rounds", "--rounds nb-messages", "Nb messages to send." do |opt|
+		CLI.rounds = opt.to_i
+	end
+
+	parser.on "-h", "--help", "Show this help" do
+		puts parser
+		exit 0
+	end
+end
+
+def read_then_print(ws : WebSocket)
+	m = read ws
+	puts "message: #{String.new(m)}"
+end
+
+def read_then_print_hexa(ws : WebSocket)
+	m = read ws
+	print_hexa(String.new(m), "#{CBLUE}Received message hexa#{CRESET}")
+end
+
+def read(ws : WebSocket)
+	puts "reading a message"
+	m = ws.run_once
+	if m.nil?
+		raise "empty message"
+	end
+
+	m
+end
+
+def send_with_announce(ws : WebSocket, m : String)
+	puts "sending #{m}"
+	send ws, m
+end
+
+def send(ws : WebSocket, m : String | Slice)
+	ws.send m
+end
+
+begin
+	ws = WebSocket.new(URI.parse(CLI.uri))
+	puts "connection done: sending pong"
+
+	ws.on_close do |socket|
+		puts "socket is closing"
+		exit 0
+	end
+
+	message = if CLI.uri.ends_with? ".JSON"
+		IPC::Message.new(0, 2.to_u8, 3.to_u8, STDIN.gets_to_end).to_json
+	else
+		IPC::Message.new(0, 2.to_u8, 3.to_u8, STDIN.gets_to_end).to_packet
+	end
+
+	puts "final message: #{message}"
+	CLI.rounds.times do |i|
+		send ws, message
+		pp! read ws
+	end
+
+	ws.close
+	# pp! ws.run_once
+rescue e
+	puts "Exception: #{e}"
+end

src/requests/admin.cr

@@ -0,0 +1,81 @@
+
+class Websocketc::Request
+	IPC::JSON.message Test, 2 do
+		def initialize
+		end
+
+#		def read_then_print(ws : WebSocket)
+#			m = read ws
+#			puts "message: #{String.new(m)}"
+#		end
+#
+#		def read_then_print_hexa(ws : WebSocket)
+#			m = read ws
+#			print_hexa(String.new(m), "#{CBLUE}Received message hexa#{CRESET}")
+#		end
+#
+#		def read(ws : WebSocket)
+#			puts "reading a message"
+#			m = ws.run_once
+#			if m.nil?
+#				raise "empty message"
+#			end
+#
+#			m
+#		end
+#
+#		def send_with_announce(ws : WebSocket, m : String)
+#			puts "sending #{m}"
+#			send ws, m
+#		end
+#
+#		def send(ws : WebSocket, m : String | Slice)
+#			ws.send m
+#		end
+
+
+		def handle(websocketc : Websocketc::Service, event : IPC::Event::Events)
+			Baguette::Log.warning "within the test class"
+
+#			ws = WebSocket.new(URI.parse(Websocketc::Context.uri))
+#			puts "connection done: sending pong"
+#
+#			ws.on_close do |socket|
+#				puts "socket is closing"
+#				exit 0
+#			end
+#
+#			message = if Websocketc::Context.uri.ends_with? ".JSON"
+#				IPC::Message.new(0, 2.to_u8, 3.to_u8, STDIN.gets_to_end).to_json
+#			else
+#				IPC::Message.new(0, 2.to_u8, 3.to_u8, STDIN.gets_to_end).to_packet
+#			end
+#
+#			puts "final message: #{message}"
+#			Websocketc::Context.rounds.times do |i|
+#				send ws, message
+#				pp! read ws
+#			end
+#
+#			ws.close
+##			pp! ws.run_once
+
+			# At the end of this function, we should get something like this.
+			# connections[event.fd] = ws
+
+			Response::Success.new
+		rescue e
+			Baguette::Log.error "during ws init #{e}"
+			Response::Error.new "not implemented"
+		end
+	end
+	Websocketc.requests << Test
+end
+
+class Websocketc::Response
+	#IPC::JSON.message TestResponse, 2 do
+	#	def initialize
+	#	end
+	#end
+end
+

src/websocketc.cr

@@ -1,76 +1,448 @@
 require "http/web_socket"
 require "option_parser"
 
-require "./colors"
+require "ipc"
+require "baguette-crystal-base"
 require "./utils"
+require "./lib_modifications.cr"
 
-uri = "ws://localhost:1234/pong"
 
-OptionParser.parse do |parser|
-	parser.on "-u uri", "--uri uri", "URI" do |opturi|
-		uri = opturi
-	end
+# Websocketc
+# - is the application allowing libipc communications through Web Socket
+# - is designed to connect to a Websocketd server, ask for a service, then exchange data
+# - is WIP
 
-	parser.on "-h", "--help", "Show this help" do
-		puts parser
-		exit 0
+# Currently, the exchange format is JSON, encapsulated in JSON:
+#   type:    Int32       # type of the message
+#   payload: JSON::Any?  # encapsulated payload
+#
+# Websocketd deserialize the type and the payload before sending it to the service.
+
+
+module Websocketc
+	class Exception < ::Exception
 	end
 end
 
-def read_then_print(ws : WebSocket)
-	m = read ws
-	puts "message: #{String.new(m)}"
+class Context
+	class_property service : Websocketc::Service?
 end
 
-def read_then_print_hexa(ws : WebSocket)
-	m = read ws
-	print_hexa(String.new(m), "#{CBLUE}Received message hexa#{CRESET}")
+class Baguette::Configuration
+	class Websocketc < IPC
+	end
 end
 
-def read(ws : WebSocket)
-	m = ws.read
-	if m.nil?
-		raise "empty message"
+class Relation
+	property fd_client  : Int32
+	property fd_service : Int32
+	property ws         : WebSocket
+	# ws can send JSON messages instead of libipc-formated messages.
+	property is_json    : Bool
+
+	property buffer_client  : String = String.new
+	property buffer_service : String = String.new
+
+	def related? (fd : Int32)
+		fd == @fd_client || fd == @fd_service
 	end
 
-	m
-end
-
-def send_with_announce(ws : WebSocket, m : String)
-	puts "sending #{m}"
-	send ws, m
-end
-
-def send(ws : WebSocket, m : String | Slice)
-	ws.send m
-end
-
-begin
-	ws = WebSocket.new(URI.parse(uri))
-
-	puts "connection done: sending pong"
-
-	ws.on_close do |socket|
-		puts "socket is closing"
-		exit 0
+	def initialize(@fd_client, @fd_service, @ws, @is_json)
 	end
 
-	if uri.ends_with? ".JSON"
-		json_message = STDIN.gets_to_end
-		json_message = json_message.chomp
-		puts "json_message: #{json_message}"
-		final_json_message = "{ \"mtype\": 2, \"payload\": #{json_message} }"
-		puts "final json message: #{final_json_message}"
-		send ws, final_json_message
-		# send ws, "{ \"mtype\": 2, \"payload\": \"coucou\" }"
-		read ws
-	else
-		send ws, to_message(2, STDIN.gets_to_end)
-		read ws
+	def inspect(io) : Nil
+		to_s io
 	end
 
-	ws.close
-	ws.read
+	def to_s(io)
+		c = "%4d" % @fd_client
+		s = "%4d" % @fd_service
+		j = if @is_json
+			"JSON"
+		else
+			"Not JSON"
+		end
+		io << "client #{c} service #{s} #{j}"
+	end
+end
+
+# Hide the complexity of managing relations.
+class Relations < Array(Relation)
+	property all_fd : Array(Int32) = Array(Int32).new
+	def <<(relation : Relation)
+		Baguette::Log.debug "Adding a new relation: #{relation}"
+		@all_fd << relation.fd_client
+		@all_fd << relation.fd_service
+		super relation
+	end
+
+	def search?(fd : Int32) : Relation?
+		find {|r| r.fd_client == fd || r.fd_service == fd }
+	end
+
+	def remove(fd : Int32)
+		# Baguette::Log.warning "context before removing #{fd}:"
+		# Context.service.not_nil!.print_self
+
+		each do |r|
+			if r.related? fd
+				Baguette::Log.debug "Closing this relation: #{r}"
+
+				# Removing relations and file descriptors from C structures.
+				pointer_ctx = Context.service.not_nil!.pointer
+				LibIPC.ipc_ctx_switching_del pointer_ctx, r.fd_client
+				LibIPC.ipc_del_fd pointer_ctx, r.fd_client
+				LibIPC.ipc_del_fd pointer_ctx, r.fd_service
+
+				# Close these sockets.
+				# Baguette::Log.debug "Closing both #{r.fd_client} and #{r.fd_service} (ws)"
+				begin
+					s = Socket.new r.fd_client, Socket::Family::UNIX, Socket::Type::RAW
+					s.close
+				rescue e
+					Baguette::Log.error "(ignoring) closing the client socket: #{e}"
+				end
+				begin
+					r.ws.close
+				rescue e
+					Baguette::Log.error "(ignoring) closing the ws: #{e}"
+				end
+				# Trying not to close this socket (ws already do that).
+				#begin
+				#	s = Socket.new r.fd_service, Socket::Family::INET, Socket::Type::STREAM
+				#	s.close
+				#rescue e
+				#	Baguette::Log.error "(ignoring) closing the service socket: #{e}"
+				#end
+
+				all_fd.select! {|v| v != r.fd_client && v != r.fd_service }
+			end
+		end
+		select! {|r| ! r.related? fd }
+
+		# Baguette::Log.warning "context after removing #{fd}"
+		# Context.service.not_nil!.print_self
+	end
+end
+
+require "./network.cr"
+
+def ws_cb_in(fd : Int32, pm : LibIPC::Message*, more_to_read : Int16*)
+	Context.service.not_nil!.relations.search?(fd).try do |relation|
+		# Baguette::Log.info "IN fd is #{fd} in relation #{relation}"
+		# Context.service.not_nil!.print_self
+		message = nil
+		begin
+			message = relation.ws.run_once
+		rescue e
+			Baguette::Log.error "run_once FAILED: #{e}"
+			Context.service.not_nil!.relations.remove fd
+			return LibIPC::IPCCB::Closing
+		end
+
+		if relation.ws.ws.io.empty?
+			more_to_read[0] = 0
+		else
+			more_to_read[0] = 1
+		end
+
+		if relation.ws.closed?
+			Baguette::Log.info "client closed the connection"
+			Context.service.not_nil!.relations.remove fd
+			return LibIPC::IPCCB::Closing
+		end
+
+		if message.nil?
+			Baguette::Log.error "Reveiced a nil message"
+			Context.service.not_nil!.relations.remove fd
+			return LibIPC::IPCCB::Closing
+		end
+
+		case message
+		when String
+			if relation.is_json
+				# Reassemble the message.
+				m = relation.buffer_client + message
+				# Clean the buffer.
+				relation.buffer_client = String.new
+
+				begin
+					ipc_message = IPC::Message.from_json m
+					ipc_message.copy_to_message_pointer pm
+				rescue e
+					Baguette::Log.error "cannot send message coming from #{fd}, message: #{m}"
+					Context.service.not_nil!.relations.remove fd
+					Baguette::Log.error "error: #{e}"
+					return LibIPC::IPCCB::Error
+				end
+
+				Baguette::Log.debug "no error reassembling the message"
+				return LibIPC::IPCCB::NoError
+			end
+			Baguette::Log.error "cannot handle non-json messages!"
+			return LibIPC::IPCCB::Error
+
+		when WebSocket::Ping
+			Baguette::Log.debug "TODO: Received a ping message"
+			return LibIPC::IPCCB::Ignore
+
+		when WebSocket::NotFinal
+			Baguette::Log.debug "Received only part of a message"
+			relation.buffer_client += message.message
+			return LibIPC::IPCCB::Ignore
+
+		when Bytes
+			# TODO: we should test the format and maybe its content
+			Baguette::Log.debug "Received a binary message"
+			unless relation.is_json
+				# Reassemble the message.
+				# m = relation.buffer_client.to_slice + message
+				# # Clean the buffer.
+				# relation.buffer_client = String.new
+				# TODO: FIXME: cannot have a buffer for large messages, yet
+				m = message
+
+				begin
+					ipc_message = IPC::Message.from_cbor m
+					ipc_message.copy_to_message_pointer pm
+
+				rescue e
+					Baguette::Log.error "cannot send message coming from #{fd}, message: #{m}"
+					Context.service.not_nil!.relations.remove fd
+					Baguette::Log.error "error: #{e}"
+					return LibIPC::IPCCB::Error
+				end
+
+				Baguette::Log.debug "no error reassembling the message"
+				return LibIPC::IPCCB::NoError
+			end
+			Baguette::Log.error "message received in bytes, yet it should be JSON"
+			Context.service.not_nil!.relations.remove fd
+			return LibIPC::IPCCB::Error
+
+		else
+			# every other option should be dropped
+			case message
+			when WebSocket::Error
+				Baguette::Log.error "An error occured"
+				Context.service.not_nil!.relations.remove fd
+				return LibIPC::IPCCB::Error
+			when WebSocket::Pong
+				Baguette::Log.error "Received a pong message"
+				return LibIPC::IPCCB::Ignore
+			when WebSocket::Close
+				Baguette::Log.debug "Received a close message"
+				Context.service.not_nil!.relations.remove fd
+				return LibIPC::IPCCB::Closing
+			else
+				Baguette::Log.error "Received a websocket message with unknown type"
+			end
+		end
+	end
+
+	return LibIPC::IPCCB::Error
 rescue e
-	puts "Exception: #{e}"
+	Baguette::Log.error "Exception (receiving a message) #{e}"
+	# tcp = WrappedTCPFileDescriptor.new(fd: fd, family: Socket::Family::INET)
+	# tcp.close
+	Context.service.not_nil!.relations.remove fd
+	return LibIPC::IPCCB::Error
 end
+
+def ws_cb_out(fd : Int32, pm : Pointer(LibIPC::Message))
+	Context.service.not_nil!.relations.search?(fd).try do |relation|
+		# Baguette::Log.info "OUT fd is #{fd} in relation #{relation}"
+		# Context.service.not_nil!.print_self
+		message = IPC::Message.new pm
+		# Baguette::Log.info "message to send: #{message}"
+
+		if relation.is_json
+			buf = message.to_json
+		else
+			buf = message.to_cbor
+		end
+
+		relation.ws.send buf
+		return LibIPC::IPCCB::NoError
+	end
+
+	Baguette::Log.error "Wait, not supposed to get here. No relation?"
+	return LibIPC::IPCCB::Error
+
+rescue e
+	Baguette::Log.error "Exception during message transfer: #{e}"
+	Context.service.not_nil!.relations.remove fd
+	return LibIPC::IPCCB::Error
+end
+
+
+class Websocketc::Service < IPC::Server
+	property relations : Relations = Relations.new
+	property config    : Baguette::Configuration::Websocketc
+
+	def initialize(@config : Baguette::Configuration::Websocketc)
+		super "ws"
+		Context.service = self
+	end
+
+	def print_self
+		Baguette::Log.warning "From C perspective"
+		LibIPC.ipc_ctx_print self.pointer
+
+		Baguette::Log.warning "From Crystal perspective"
+		Baguette::Log.warning "all fd: #{@relations.all_fd.join ", "}"
+		@relations.each do |r| pp! r end
+		Baguette::Log.warning "==="
+	end
+
+	def first_connection(event : IPC::Event::MessageReceived)
+		# First message format: "URI"
+		payload = String.new event.message.payload
+		# Baguette::Log.info "First message received: #{payload}"
+
+		# TODO: handle exceptions and errors
+
+		begin
+			uri = URI.parse payload
+			ws = WebSocket.new uri
+
+			is_json = uri.path.ends_with? ".JSON"
+
+			service_fd = ws.ws.io.as(TCPSocket).fd
+
+			relation = Relation.new event.fd, service_fd, ws, is_json
+			@relations << relation
+
+			# Change client fd status.
+			LibIPC.ipc_ctx_fd_type self.pointer, event.fd, LibIPC::ConnectionType::Switched
+
+			# Add service fd as switched.
+			LibIPC.ipc_add_fd_switched self.pointer, service_fd
+
+			# Link both file descriptors
+			LibIPC.ipc_ctx_switching_add self.pointer, event.fd, service_fd
+
+			# Change service fd callbacks: only the service callbacks are changed,
+			# since the associated client is a simple libipc client
+
+			proc_cb_in  = ->ws_cb_in(Int32, Pointer(LibIPC::Message), Int16*)
+			proc_cb_out = ->ws_cb_out(Int32, Pointer(LibIPC::Message))
+
+			LibIPC.ipc_switching_callbacks self.pointer, service_fd, proc_cb_in, proc_cb_out
+
+			# Baguette::Log.debug "new client: #{event.fd}"
+
+		rescue e
+			Baguette::Log.error "cannot connect to #{payload}: #{e}"
+		end
+
+		send_now event.fd, 1.to_u8, "OK"
+	end
+
+	def run
+		Baguette::Log.title "Starting websocketc"
+
+		@timer      = @config.ipc_timer
+		@base_timer = @config.ipc_timer
+
+		self.loop do |event|
+			begin
+				case event
+				when IPC::Event::Timer
+					Baguette::Log.debug "Timer" if @config.print_ipc_timer
+					# print_self
+
+				when IPC::Event::Connection
+					Baguette::Log.info "connection from #{event.fd}" if @config.print_ipc_connection
+
+				when IPC::Event::Disconnection
+					Baguette::Log.info "disconnection from #{event.fd}" if @config.print_ipc_disconnection
+					@relations.remove event.fd
+
+				when IPC::Event::MessageSent
+					Baguette::Log.info "message sent to #{event.fd}" if @config.print_ipc_message_sent
+
+				when IPC::Event::MessageReceived
+					Baguette::Log.info "message received from #{event.fd}" if @config.print_ipc_message_received
+					if r = @relations.search? event.fd
+						Baguette::Log.error "MessageReceived but from an already existent relation"
+						Baguette::Log.error "relation: #{r}"
+						exit 1
+					else
+						first_connection event
+					end
+
+				when IPC::Event::Switch
+					Baguette::Log.debug "switched message from #{event.fd}" if @config.print_ipc_switch
+
+				when IPC::Event::EventNotSet
+					Baguette::Log.error "Event not set: #{event.fd}"
+					@relations.remove event.fd
+					begin
+						s = Socket.new event.fd, Socket::Family::UNIX, Socket::Type::RAW
+						s.close
+					rescue e
+						Baguette::Log.warning "cannot close the socket #{event.fd}: #{e} (ignoring)"
+					end
+
+				when IPC::Event::Error
+					Baguette::Log.error "Event Error on fd #{event.fd} (removing it)"
+					@relations.remove event.fd
+
+				when IPC::Exception
+					Baguette::Log.error "IPC::Exception: #{event.message}"
+
+					if event.message == "closed recipient"
+						Baguette::Log.error "Bloody closed recipient!"
+						# @relations.remove #
+					else
+						Baguette::Log.error "CLOSING WS"
+						exit 1
+					end
+
+				else
+					Baguette::Log.warning "unhandled IPC event: #{event.class}"
+					exit 1
+				end
+			rescue e
+				Baguette::Log.error "Exception during event handling: #{typeof(e)} - #{e.message}"
+				exit 1
+			end
+		end
+	end
+
+	def self.from_cli
+
+		# First option parsing.
+		simulation, no_configuration, configuration_file = Baguette::Configuration.option_parser
+
+		# Websocketc configuration.
+		configuration = if no_configuration
+			Baguette::Log.info "do not load a configuration file."
+			Baguette::Configuration::Websocketc.new
+		else
+			# In case there is a configuration file helping with the parameters.
+			Baguette::Configuration::Websocketc.get(configuration_file) ||
+				Baguette::Configuration::Websocketc.new
+		end
+
+
+		OptionParser.parse do |parser|
+			parser.on "-h", "--help", "Show this help" do
+				puts parser
+				exit 0
+			end
+		end
+
+		Baguette::Context.verbosity = configuration.verbosity
+
+		if simulation
+			pp! configuration
+			exit 0
+		end
+
+		::Websocketc::Service.new configuration 
+	end
+end
+
+Websocketc::Service.from_cli.run

src/websocketd-dev.cr

@@ -0,0 +1,343 @@
+require "option_parser"
+require "ipc"
+require "socket"
+require "./colors"
+
+require "colorize"
+
+require "json"
+
+require "socket"
+require "http/server"
+require "base64"
+require "digest"
+require "./utils"
+
+require "baguette-crystal-base"
+
+require "./instance_storage.cr"
+
+# All modifications to standard libraries go there.
+require "./lib_modifications.cr"
+
+class Context
+	# service instance parameters
+	# they can be changed via the cli
+	class_property service_name   : String = "websocket"
+	class_property host           : String = "0.0.0.0"
+	class_property port_to_listen : UInt16 = 1234
+	class_property timer_delay    : Int32  = 30_000  # 30 seconds
+end
+
+OptionParser.parse do |parser|
+	parser.on "-l host", "--l host", "IP address to listen on." do |h|
+		Context.host = h
+	end
+
+	parser.on "-p port", "--port port", "Port to listen on." do |port|
+		Context.port_to_listen = port.to_u16
+	end
+
+	parser.on "-s service-name", "--service-name service-name", "Service name." do |name|
+		Context.service_name = name
+	end
+
+	parser.on "-t timer-delay", "--timer-delay timer-delay", "Timer delay (in seconds)" do |t|
+		Context.timer_delay = t.to_i32 * 1000 # stored in ms
+	end
+
+	parser.on "-v verbosity-level", "--verbosity level", "Verbosity." do |opt|
+		Baguette::Context.verbosity = opt.to_i
+	end
+
+	parser.on "-h", "--help", "Show this help" do
+		puts parser
+		exit 0
+	end
+end
+
+def sending_ping_messages
+	Context.context.fd_to_websocket.each do |fd, ws|
+		begin
+			ws.ping "hello from #{fd}"
+		rescue e
+			Baguette::Log.error "Exception: #{e}, already closed client #{fd}"
+			begin
+				Context.context.remove_fd fd
+			rescue e
+				Baguette::Log.error "Cannot remove #{fd} from clients: #{e}"
+			end
+		end
+	end
+end
+
+def ws_http_upgrade(client)
+	request = HTTP::Request.from_io client
+
+	if request.nil?
+		raise "#REQUEST IS NIL"
+	end
+
+	if request.is_a? HTTP::Status && request == HTTP::Status::BAD_REQUEST
+		raise "BAD REQUEST DAZE~"
+	end
+
+	if request.is_a? HTTP::Status
+		raise "Not bad request but still pretty bad: #{request.to_s}"
+	end
+
+	# FIXME: check they actually wanted to upgrade to websocket
+	key = request.headers["Sec-WebSocket-Key"]
+	response_key = Digest::SHA1.base64digest key + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
+	# Baguette::Log.debug response_key
+
+	# HTTP inside bru
+	headers_header = "HTTP/1.1 101 Switching Protocols"
+	headers = HTTP::Headers {
+		"Upgrade" => "websocket",
+		"Connection" => "Upgrade",
+		"Sec-WebSocket-Accept" => response_key
+	}
+
+	headers = headers.map { |key, value| "#{key}: #{value[0]}\r\n" }.join
+
+	# requested service, fd
+	req_service = request.path.lchop.sub "ws/", ""
+
+	if req_service.ends_with? ".JSON"
+		Context.context.is_json[client.fd] = true
+		req_service = req_service.gsub /.JSON$/, ""
+	else
+		Context.context.is_json[client.fd] = false
+	end
+
+	# puts "#{headers_header}\n#{headers.to_s}\r\n"
+	client.send "#{headers_header}\n#{headers.to_s}\r\n"
+
+	wsclient = WebSocket.new client
+	wsclient.on_pong do |m|
+		Baguette::Log.debug "pong #{m}"
+	end
+
+	# registering the client into storing structures to avoid being garbage collected
+	Context.context.fd_to_socket[client.fd]    = client
+	Context.context.fd_to_websocket[client.fd] = wsclient
+
+	return req_service, request
+rescue e
+	Baguette::Log.error "Exception in ws_http_upgrade: #{e}"
+	raise "DROP IT"
+end
+
+def handle_new_clients(service, server)
+	# TODO: this is a lot of C-like notation, should be changed.
+	# In the client accept function
+	#   1. accept TCP/WS connection
+	client = server.accept
+
+	#   2. upgrade HTTP connections and get the service name in the URI path.
+	req_service, request = ws_http_upgrade client
+
+	#   3. connect to the service via ipc_connection_switched
+	serverfd : Int32 = 0
+	# LibIPC.ipc_connection_switched service.pointer, req_service, client.fd, Pointer(Libc::Int).null
+	spointer = pointerof(serverfd)
+	if req_service == "tracker"
+		req_service = "tracking"
+	end
+	LibIPC.ipc_connection_switched service.pointer, req_service, client.fd, spointer
+	if serverfd == 0
+		raise "Could not connect to #{req_service}"
+	end
+
+	#   4. change client callbacks via ipc_switching_callbacks
+	#      only the client callbacks are changed, since the associated server is a simple libipc service
+	proc_cb_in  = ->ws_cb_in(Int32, Pointer(LibIPC::Message), Int16*)
+	proc_cb_out = ->ws_cb_out(Int32, Pointer(LibIPC::Message))
+
+	LibIPC.ipc_switching_callbacks service.pointer, client.fd, proc_cb_in, proc_cb_out
+
+	#   5. In case the requested service is trackingd,
+	#      the websocketd has to provide the IP address as the first message.
+	if req_service == "tracking"
+		# The proxy is configured to provide the X-Real-IP in the headers.
+		# If not found, we use the client address from the socket.
+		real_ip_address = request.headers["X-Real-IP"] || client.remote_address.address
+
+		Baguette::Log.info "trackingd - sending the IP address #{real_ip_address} to fd #{serverfd}"
+		# sfd = Context.context.switchtable[client.fd]
+		# message = IPC::Message.from_json(JSON).to_packet
+		# => JSON has to include these attributes: mtype, utype, payload
+		# message = IPC::Message.new mtype, utype, payload
+		# remote_address = client.remote_address.address
+		message = IPC::Message.new serverfd, 1, 1.to_u8, "{\"ipaddress\": \"#{real_ip_address}\"}"
+		service.send message
+		# serv = WrappedTCPFileDescriptor.new(fd: serverfd, family: Socket::Family::INET)
+		# serv.send message.to_packet
+	end
+
+	Baguette::Log.debug "new client: #{client.fd}"
+rescue e
+	Baguette::Log.error "Exception in handle_new_client: #{e}"
+	unless client.nil?
+		client.close
+	end
+end
+
+def ws_cb_out(fd : Int32, pm : Pointer(LibIPC::Message))
+	# Baguette::Log.info "OUT fd is #{fd}"
+	wsclient = Context.context.fd_to_websocket[fd]
+
+	message = IPC::Message.new pm
+	# pp! message
+
+	if Context.context.is_json[fd]
+		buf = message.to_json
+	else
+		buf = message.to_packet
+	end
+
+	wsclient.send buf
+
+	return LibIPC::IPCCB::NoError
+rescue e
+	Baguette::Log.error "Exception during message transfer: #{e}"
+	Context.context.remove_fd fd
+	return LibIPC::IPCCB::Error
+end
+
+def ws_cb_in(fd : Int32, pm : LibIPC::Message*, more_to_read : Int16*)
+	# Baguette::Log.debug "IN fd is #{fd}"
+
+	wsclient = Context.context.fd_to_websocket[fd]
+
+	message = nil
+	begin
+		message = wsclient.run_once
+	rescue e
+		Baguette::Log.error "run_once FAILED: #{e}"
+		Context.context.remove_fd fd
+		return LibIPC::IPCCB::Error
+	end
+
+	if wsclient.ws.io.empty?
+		more_to_read[0] = 0
+	else
+		more_to_read[0] = 1
+	end
+
+	if wsclient.closed?
+		Baguette::Log.info "client closed the connection"
+		Context.context.remove_fd fd
+		return LibIPC::IPCCB::Closing
+	end
+
+	if message.nil?
+		Baguette::Log.error "Reveiced a nil message"
+		Context.context.remove_fd fd
+		return LibIPC::IPCCB::Closing
+	end
+
+	case message
+	when String
+		if Context.context.is_json[fd]
+			ipc_message = IPC::Message.from_json(message)
+			ipc_message.copy_to_message_pointer pm
+			return LibIPC::IPCCB::NoError
+		end
+	else
+		# every other option should be dropped
+		case message
+		when WebSocket::Error
+			Baguette::Log.error "An error occured"
+			Context.context.remove_fd fd
+			return LibIPC::IPCCB::Error
+		when WebSocket::Ping
+			Baguette::Log.debug "Received a ping message"
+			Context.context.remove_fd fd
+			return LibIPC::IPCCB::Ignore
+		when WebSocket::Pong
+			Baguette::Log.debug "Received a pong message"
+			return LibIPC::IPCCB::Ignore
+		when WebSocket::Close
+			Baguette::Log.debug "Received a close message"
+			Context.context.remove_fd fd
+			return LibIPC::IPCCB::Closing
+		when WebSocket::NotFinal
+			Baguette::Log.warning "Received only part of a message: NOT IMPLEMENTED"
+			Context.context.remove_fd fd
+			return LibIPC::IPCCB::Error
+		when Bytes
+			# TODO: when receiving a binary message
+			# we should test the format and maybe its content
+			Baguette::Log.error "Received a binary message: NOT IMPLEMENTED, YET"
+			Context.context.remove_fd fd
+			return LibIPC::IPCCB::Error
+		else
+			Baguette::Log.error "Received a websocket message with unknown type"
+		end
+	end
+
+	return LibIPC::IPCCB::Error
+
+rescue e
+	Baguette::Log.error "Exception (receiving a message) #{e}"
+	# tcp = WrappedTCPFileDescriptor.new(fd: fd, family: Socket::Family::INET)
+	# tcp.close
+	Context.context.remove_fd fd
+	return LibIPC::IPCCB::Error
+end
+
+class Context
+	class_property context = InstanceStorage.new
+end
+
+def main
+	# by default, listen on any IP address
+	server  = TCPServer.new(Context.host, Context.port_to_listen)
+	service = IPC::Server.new Context.service_name
+	service << server.fd
+
+	# Every few seconds, the service should trigger the timer
+	# Allowing the sending of Ping messages to clients
+	service.base_timer = Context.timer_delay
+	service.timer      = Context.timer_delay
+
+	service.loop do |event|
+		# Baguette::Log.info "current state of the context:"
+		# service.pp
+		case event
+		when IPC::Event::Timer
+			Baguette::Log.debug "IPC::Event::Timer"
+			sending_ping_messages
+
+		when IPC::Event::Connection
+			Baguette::Log.debug "IPC::Event::Connection: fd #{event.fd}"
+
+		when IPC::Event::Disconnection
+			Baguette::Log.debug "IPC::Event::Disconnection: fd #{event.fd}"
+			Context.context.remove_fd event.fd
+
+		when IPC::Event::ExtraSocket
+			Baguette::Log.debug "IPC::Event::ExtraSocket: fd #{event.fd}"
+			if server.fd != event.fd
+				raise "Error: the only extra socket should be the TCP/WS server"
+			end
+			handle_new_clients(service, server)
+
+		when IPC::Event::Switch
+			Baguette::Log.debug "IPC::Event::Switch: fd #{event.fd}"
+			# raise "Not implemented."
+
+		when IPC::Event::MessageSent
+			Baguette::Log.debug "IPC::Event::MessageSent: fd #{event.fd}"
+
+		when IPC::Event::MessageReceived
+			Baguette::Log.debug "IPC::Event::Message: fd #{event.fd}"
+
+			raise "Not implemented."
+		end
+	end
+end
+
+main

src/websocketd.cr

@@ -1,5 +1,6 @@
 require "option_parser"
 require "ipc"
+require "ipc/json"
 require "socket"
 require "./colors"
 
@@ -11,37 +12,71 @@ require "base64"
 require "digest"
 require "./utils"
 
+require "baguette-crystal-base"
+
+require "colorize"
+
 # All modifications to standard libraries go there.
 require "./lib_modifications.cr"
 
-# service instance parameters
-# they can be changed via the cli
-service_name = "websocket"
-host = "0.0.0.0"
-port_to_listen = 1234
-timer_delay = 30_000.to_f64 # 30 seconds
+class Tracking::Request
+	IPC::JSON.message IpAddress, 1 do
+		property ipaddress : String?
+
+		def initialize(@ipaddress = nil)
+		end
+	end
+end
+
+class Baguette::Configuration
+	class Websocket < IPC
+		# service instance parameters
+		# they can be changed via the cli
+		property service_name    : String = "websocket"
+		property host            : String = "0.0.0.0"
+		property port            : UInt16 = 1234
+
+		property print_messages  : Bool   = false
+	end
+end
+
+simulation, no_configuration, configuration_file = Baguette::Configuration.option_parser
+
+configuration = if no_configuration
+	Baguette::Log.info "do not load a configuration file."
+	Baguette::Configuration::Websocket.new
+else
+	Baguette::Configuration::Websocket.get(configuration_file) ||
+		Baguette::Configuration::Websocket.new
+end
+
+Baguette::Context.verbosity = configuration.verbosity
 
-verbosity = 1
 
 OptionParser.parse do |parser|
 	parser.on "-l host", "--l host", "IP address to listen on." do |h|
-		host = h
+		configuration.host = h
 	end
 
 	parser.on "-p port", "--port port", "Port to listen on." do |port|
-		port_to_listen = port.to_u16
+		configuration.port = port.to_u16
 	end
 
 	parser.on "-s service-name", "--service-name service-name", "Service name." do |name|
-		service_name = name
+		configuration.service_name = name
 	end
 
 	parser.on "-t timer-delay", "--timer-delay timer-delay", "Timer delay (in seconds)" do |t|
-		timer_delay = t.to_f64 * 1000 # stored in ms
+		configuration.ipc_timer = t.to_i32 * 1000
 	end
 
-	parser.on "-v verbosity-level", "--verbosity level", "Verbosity." do |opt|
-		verbosity = opt.to_i
+	parser.on "-T", "--print-timer", "Print timer." do
+		configuration.print_ipc_timer = true
+	end
+
+	parser.on "-M", "--print-messages", "Print messages received and sent." do
+		configuration.print_messages = true
+		Baguette::Log.info "print messages"
 	end
 
 	parser.on "-h", "--help", "Show this help" do
@@ -51,7 +86,7 @@ OptionParser.parse do |parser|
 end
 
 
-# Link between fd and TCPSocket, WebSocket and IPC::Connection instances.
+# Link between fd and TCPSocket, WebSocket and IPC::Client instances.
 class InstanceStorage
 	property service : IPC::SwitchingService
 	property switchtable : Hash(Int32, Int32)
@@ -59,7 +94,8 @@ class InstanceStorage
 	property is_json : Hash(Int32, Bool)
 	property fd_to_tcpsocket : Hash(Int32, TCPSocket)
 	property fd_to_websocket : Hash(Int32, WebSocket)
-	property fd_to_ipcconnection : Hash(Int32, IPC::Connection)
+	property fd_to_ipcclient : Hash(Int32, IPC::Client)
+	property fd_to_buffer    : Hash(Int32, String)
 
 	def initialize (@service : IPC::SwitchingService)
 		# fdlist_client = [] of TCPSocket
@@ -68,26 +104,47 @@ class InstanceStorage
 		@is_json = Hash(Int32,Bool).new
 		@fd_to_tcpsocket = Hash(Int32, TCPSocket).new
 		@fd_to_websocket = Hash(Int32, WebSocket).new
-		@fd_to_ipcconnection = Hash(Int32, IPC::Connection).new
+		@fd_to_ipcclient = Hash(Int32, IPC::Client).new
+		@fd_to_buffer    = Hash(Int32, String).new
 	end
 
 	def remove_fd (fdclient : Int32)
-		puts "#{CBLUE}closing the client:#{CRESET} #{fdclient}"
-		# 1. closing both the client and the service
-		fdservice = @switchtable[fdclient]?
-		tcpfdc = @fd_to_tcpsocket[fdclient]
+		Baguette::Log.info "closing the client:#{CRESET} #{fdclient}"
+		if fdclient == -1
+			raise "fdclient is -1, nothing to do with it"
+		end
 
-		# 2. closing the TCP connections
-		tcpfdc.close unless tcpfdc.closed?
+		begin
+			# 1. closing both the client and the service
+			tcpfdc = @fd_to_tcpsocket[fdclient]
+
+			# 2. closing the TCP connections
+			tcpfdc.close unless tcpfdc.closed?
+		rescue e
+			Baguette::Log.error "remove_fd: 1 #{e}"
+		end
 
 		# 3. removing the client and the service fds from the loop check
-		@service.remove_fd (fdclient)
+		begin
+			@service.remove_fd (fdclient)
+		rescue e
+			Baguette::Log.error "remove_fd: 2 #{e}"
+		end
 
 		# 5. removing both the client and the service from the switchtable
+		fdservice = @switchtable[fdclient]?
 		@switchtable = @switchtable.select do |fdc, fds|
 			fdc != fdclient && fds != fdclient
 		end
 
+		@fd_to_buffer.select! do |fd, buffer|
+			if fdservice.nil?
+				fd != fdclient
+			else
+				fd != fdclient && fd != fdservice
+			end
+		end
+
 		# 6. removing the client and the service from is_client
 		@is_client = @is_client.select do |fd,v| fd != fdclient end
 		@is_json = @is_json.select do |fd,v| fd != fdclient end
@@ -96,30 +153,63 @@ class InstanceStorage
 			fd != fdclient
 		end
 
-		unless fdservice.nil?
-			service = @fd_to_ipcconnection[fdservice]
-			service.close
+		begin
+		if fdservice.nil?
+			Baguette::Log.debug "client #{fdclient} aleady has its service removed"
+		else
 			@service.remove_fd (fdservice)
-			@fd_to_ipcconnection = @fd_to_ipcconnection.select do |k, v|
+
+			service = @fd_to_ipcclient[fdservice]
+			@fd_to_ipcclient = @fd_to_ipcclient.select do |k, v|
 				k != fdservice
 			end
 
 			@is_client = @is_client.select do |fd,v| fd != fdservice end
+
+			# perform the close at the end
+			# on crash, this service still is removed from the list of listened fd
+			service.close
 		end
+		rescue e
+			Baguette::Log.error "remove_fd: 3 #{e}"
+		end
+	rescue e
+		Baguette::Log.error "in InstanceStorage#remove_fd: #{e}"
 	end
 end
 
+class Context
+	class_property service_name   = "websocketd"
+end
+
+Context.service_name = configuration.service_name
+
+class Context
+	class_property service        = IPC::SwitchingService.new service_name
+	class_property context        = InstanceStorage.new service
+	class_property print_messages = false
+	class_property print_timer    = false
+end
+
+Context.print_messages = configuration.print_messages
+Context.print_timer    = configuration.print_ipc_timer
+
+
+if simulation
+	pp! configuration
+	exit 0
+end
+
+
 # by default, listen on any IP address
-server = TCPServer.new(host, port_to_listen)
-service = IPC::SwitchingService.new service_name
-service << server.fd
-context = InstanceStorage.new service
+server = TCPServer.new configuration.host, configuration.port
+Context.service << server.fd
 
-
-
-def websocket_client_connection(client, context : InstanceStorage)
+def websocket_client_connection(client)
 	request = HTTP::Request.from_io client
-	# pp! request
+	if Context.print_messages
+		pp! request
+	end
 
 	if request.nil?
 		raise "#REQUEST IS NIL"
@@ -150,7 +240,7 @@ def websocket_client_connection(client, context : InstanceStorage)
 	headers = headers.map { |key, value| "#{key}: #{value[0]}\r\n" }.join
 
 	# requested service, fd
-	req_service = request.path.lchop
+	req_service = request.path.lchop.sub "ws/", ""
 	if req_service.empty?
 		client.close
 		return
@@ -160,49 +250,55 @@ def websocket_client_connection(client, context : InstanceStorage)
 	# To that end, the client may send the name of the service it wants to reach with the prefix ".JSON".
 
 	if req_service.ends_with? ".JSON"
-		context.is_json[client.fd] = true
+		Context.context.is_json[client.fd] = true
 		req_service = req_service.gsub /.JSON$/, ""
 	else
-		context.is_json[client.fd] = false
+		Context.context.is_json[client.fd] = false
 	end
 
-	websocket_connection_procedure req_service, client.fd, context
-
-	# TODO: if trackerd, send the IP address of the client
+	# Hack to preserve the daemon naming convention.
 	if req_service == "tracker"
-		puts "tracker - sending the IP address"
-		puts "connection from #{client.remote_address}"
-		sfd = context.switchtable[client.fd]
-		# message = IPC::Message.from_json(JSON).to_packet
-		# => JSON has to include these attributes: mtype, utype, payload
-		# message = IPC::Message.new mtype, utype, payload
-		remote_address = client.remote_address.address
-		message = IPC::Message.new 1, 1.to_u8, "{\"ipaddress\": \"#{remote_address}\"}"
-		serv = WrappedTCPFileDescriptor.new(fd: sfd, family: Socket::Family::INET)
-		serv.send message.to_packet
+		req_service = "tracking"
 	end
 
-	# puts "#{headers_header}\n#{headers.to_s}\r\n"
+	websocket_connection_procedure req_service, client.fd
+
+	# If the requested service is trackingd, send the IP address of the client
+	if req_service == "tracking"
+		real_ip_address = request.headers["X-Real-IP"]? || client.remote_address.address
+
+		sfd = Context.context.switchtable[client.fd]
+		Baguette::Log.info "trackingd - sending the IP address #{real_ip_address} to fd #{sfd}"
+		message = Tracking::Request::IpAddress.new real_ip_address
+
+		if Context.print_messages
+			Baguette::Log.info "to trackingd: #{message.to_s}"
+		end
+		Context.service.send_now sfd, message
+	end
+
+	if Context.print_messages
+		Baguette::Log.info "to client: #{headers_header}\n#{headers.to_s}"
+	end
 	client.send "#{headers_header}\n#{headers.to_s}\r\n"
 
 	wsclient = WebSocket.new client
 	wsclient.on_pong do |m|
-		puts "pong #{m}"
+		Baguette::Log.debug "pong #{m}"
 	end
-	context.is_client[client.fd] = true
+	Context.context.is_client[client.fd] = true
 
 	# listen to the client's file descriptor
-	context.service << client.fd
-	# puts "#{CBLUE}new client: #{client.fd}#{CRESET}"
+	Context.context.service << client.fd
 
 	# registering the client into storing structures to avoid being garbage collected
-	context.fd_to_tcpsocket[client.fd] = client
-	context.fd_to_websocket[client.fd] = wsclient
+	Context.context.fd_to_tcpsocket[client.fd] = client
+	Context.context.fd_to_websocket[client.fd] = wsclient
 end
 
-
-def closing_client (fdclient : Int, context : InstanceStorage)
-	context.remove_fd fdclient
+def closing_client (fdclient : Int)
+	Baguette::Log.warning "Closing client #{fdclient}"
+	Context.context.remove_fd fdclient
 end
 
 # first message from the client: requested service name
@@ -210,143 +306,235 @@ end
 # 2. listening on the service fd
 # 3. bounding both file descriptors (through switchtable hash)
 # 4. indicating that the client is connected (in is_client)
-def websocket_connection_procedure (requested_service : String, clientfd : Int32, context : InstanceStorage)
+def websocket_connection_procedure (requested_service : String, clientfd : Int32)
 	begin
-		# 2. establishing a connection to the service
-		newservice = IPC::Connection.new requested_service
-		context.fd_to_ipcconnection[newservice.fd] = newservice
+		# 1. establishing a connection to the service
+		newservice = IPC::Client.new requested_service
+		new_service_fd = newservice.fd.not_nil!
+		Context.context.fd_to_ipcclient[new_service_fd] = newservice
 
-		# 3. listening on the client fd and the service fd
-		context.service << newservice.fd
+		# 2. listening on the client fd and the service fd
+		Context.context.service << new_service_fd
 
 		# cannot perform automatic switching due to websockets headers
 		# future version of the libipc lib should include some workaround, probably
 		# service.switch.add fdclient, newservice.fd
 
-		# 4. bounding the client and the service fd
-		context.switchtable[clientfd] = newservice.fd
-		context.switchtable[newservice.fd] = clientfd
+		# 3. bounding the client and the service fd
+		Context.context.switchtable[clientfd] = new_service_fd
+		Context.context.switchtable[new_service_fd] = clientfd
 
-		# 5. the client is then connected, send it a message
-		context.is_client[clientfd] = true
-		context.is_client[newservice.fd] = false
+		# 4. the client is then connected, send it a message
+		Context.context.is_client[clientfd] = true
+		Context.context.is_client[new_service_fd] = false
 	rescue e
-		puts "#{CRED}Exception during connection to the service:#{CRESET} #{e}"
-		context.remove_fd clientfd
+		Baguette::Log.error "Exception during connection to the service: #{e}"
+		Context.context.remove_fd clientfd
 	end
 end
 
-def websocket_switching_procedure (activefd : Int, context : InstanceStorage)
+def print_message(message : Bytes, origin : Int32)
+	return unless Context.print_messages
+
+	client = if Context.context.is_client[origin]
+		"client"
+	else
+		"server"
+	end
+	Baguette::Log.info "received message from #{origin} (#{client}):"
+	Baguette::Log.info "#{message.hexstring}"
+end
+
+def print_message(message : String, origin : Int32)
+	return unless Context.print_messages
+
+	client = if Context.context.is_client[origin]
+		"client"
+	else
+		"server"
+	end
+	Baguette::Log.info "received message from #{origin} (#{client}):"
+	pp! JSON.parse message
+rescue e
+	Baguette::Log.warning "cannot see the message from #{origin} (#{client}): #{e}"
+end
+
+# WARNING: currently this is only covering String messages.
+#          Byte messages aren't addressed, yet.
+def websocket_switching_procedure (activefd : Int)
 	begin
-		if context.is_client[activefd]
+		# Baguette::Log.title "activefd is #{activefd}"
+		if Context.context.is_client[activefd]
+			# Baguette::Log.title "activefd #{activefd} is a client"
 			# The client is a WebSocket on top of a TCP connection
-			client = context.fd_to_tcpsocket[activefd]
-			wsclient = context.fd_to_websocket[activefd]
+			client = Context.context.fd_to_tcpsocket[activefd]
+			wsclient = Context.context.fd_to_websocket[activefd]
+
 			loop do
 				begin
 					message = wsclient.run_once
 				rescue e
-					puts "#{CRED}Exception (receiving a message)#{CRESET} #{e}"
-					context.remove_fd activefd
-					return
+					Baguette::Log.error "Exception (receiving a message) #{e}"
+					Context.context.remove_fd activefd
+					break
 				end
 
 				# Checking the internals of WebSocket, then the contained IO within, to know if there is still something to read in the socket.
 				still_something_to_read = ! wsclient.ws.io.empty?
 
 				if wsclient.closed?
-					# puts "#{CBLUE}client is closed#{CRESET}"
-					context.remove_fd client.fd
-					return
+					Baguette::Log.info "client #{activefd} is closing"
+					Context.context.remove_fd activefd
+					break
 				end
 
 				if message.nil?
-					puts "#{CRED}message is nil#{CRESET}"
-					context.remove_fd client.fd
-					return
+					Baguette::Log.error "message received from #{activefd} is nil"
+					Context.context.remove_fd activefd
+					if still_something_to_read
+						Baguette::Log.info "Still something to read, but #{activefd} was removed"
+						next
+					end
+					break
 				end
 
 				case message
 				when WebSocket::Error
-					puts "#{CRED}An error occured#{CRESET}"
-					context.remove_fd client.fd
+					Baguette::Log.error "An error occured with client #{activefd}"
+					Context.context.remove_fd activefd
+					if still_something_to_read
+						Baguette::Log.debug "Still something to read, but #{activefd} was removed"
+						next
+					end
 					return
+
 				when WebSocket::Ping
-					# puts "#{CBLUE}Received a ping message#{CRESET}"
-					next if still_something_to_read
+					Baguette::Log.debug "Received a ping message"
+					if still_something_to_read
+						Baguette::Log.debug "Still something to read"
+						next
+					end
 					break
+
 				when WebSocket::Pong
-					# puts "#{CBLUE}Received a pong message#{CRESET}"
-					next if still_something_to_read
+					Baguette::Log.debug "Received a pong message"
+					if still_something_to_read
+						Baguette::Log.debug "Still something to read"
+						next
+					end
 					break
+
 				when WebSocket::Close
-					# puts "#{CBLUE}Received a close message#{CRESET}"
-					context.remove_fd client.fd
-					return
-				when WebSocket::NotFinal
-					# puts "#{CBLUE}Received only part of a message#{CRESET}"
-					next if still_something_to_read
+					Baguette::Log.debug "Received a close message"
+					Context.context.remove_fd activefd
+					if still_something_to_read
+						Baguette::Log.debug "Still something to read"
+						next
+					end
 					break
+
+				when WebSocket::NotFinal
+					Baguette::Log.debug "Received only part of a message"
+					# There is a per-user buffer in case we receive "not final" websocket messages.
+					# In case the buffer isn't set yet.
+					unless Context.context.fd_to_buffer[activefd]?
+						Context.context.fd_to_buffer[activefd] = String.new
+					end
+					# Add the received message to the buffer.
+					Context.context.fd_to_buffer[activefd] += message.message
+					if still_something_to_read
+						Baguette::Log.debug "and there is still something to read"
+						next
+					end
+					break
+
 				when Bytes
-					# TODO: when receiving a binary message
-					# we should test the format and maybe its content
-					# puts "#{CBLUE}Received a binary message#{CRESET}"
+					# We should test the format and maybe its content when receiving a binary message.
+					Baguette::Log.warning "Received a binary message"
 				end
 
-				if context.is_json[activefd] && message.is_a?(String)
+				# Is there a (non empty) buffer for the active fd?
+				buffer_size = if Context.context.fd_to_buffer[activefd]?
+					Context.context.fd_to_buffer[activefd].size
+				else
+					0
+				end
+
+				# TODO: make this buffer work with bytes messages.
+				# In case there was a previous message within a fragment.
+				if message.is_a?(String) && buffer_size > 0
+					message = Context.context.fd_to_buffer[activefd] + message
+					Context.context.fd_to_buffer[activefd] = String.new
+				end
+
+				if Context.context.is_json[activefd] && message.is_a?(String)
+					print_message message, activefd
 					message = IPC::Message.from_json(message).to_packet
+				elsif ! Context.context.is_json[activefd] && message.is_a?(Bytes)
+					# not json and bytes
+					print_message message, activefd
+					message = IPC::Message.from_cbor(message).to_packet
+				else
+					Baguette::Log.warning "message is neither JSON and string, or not JSON and bytes."
+					Baguette::Log.warning "message is #{message.class.to_s}"
 				end
 
 				# client => service
-				fdservice = context.switchtable[activefd]
+				fdservice = Context.context.switchtable[activefd]
 
 				# XXX: this is not a TCP fd, but since behind the scene this is compatible, I'm hacking a bit
 				# Also, I changed the "finalize" method of the TCPFileDescriptor class not to close the socket
 				# when the object is GC.
 				serv = WrappedTCPFileDescriptor.new(fd: fdservice, family: Socket::Family::INET)
-				#serv = context.fd_to_ipcconnection[fdservice]
-				serv.send message
+				#serv = Context.context.fd_to_ipcclient[fdservice]
+				begin
+					serv.send message
+				rescue e
+					Baguette::Log.error "Sending a message failed: #{e}"
+				end
 
 				break unless still_something_to_read
 
 			end # loop over the remaining messages to read on the websocket
 		else
 			# service => client
-			fdclient = context.switchtable[activefd]
-			wsclient = context.fd_to_websocket[fdclient]
+			fdclient = Context.context.switchtable[activefd]
+			wsclient = Context.context.fd_to_websocket[fdclient]
 
-			serv = context.fd_to_ipcconnection[activefd]
+			serv = Context.context.fd_to_ipcclient[activefd]
 			message = serv.read
 
-			if context.is_json[fdclient]
-				buf = message.to_json
-			else
-				buf = message.to_packet
+			buf = if Context.context.is_json[fdclient]
+				message.to_json
+			else # We assume that non-JSON clients are CBOR clients.
+				message.to_cbor
 			end
 
+			print_message buf, activefd
+
 			wsclient.send buf
 		end
 	rescue e
-		puts "#{CRED}Exception during message transfer:#{CRESET} #{e}"
-		if context.is_client[activefd]
-			closing_client activefd, context
+		Baguette::Log.error "Exception during message transfer: #{e}"
+		if Context.context.is_client[activefd]
+			closing_client activefd
 		else
-			clientfd = context.switchtable[activefd]
-			closing_client clientfd, context
+			clientfd = Context.context.switchtable[activefd]
+			closing_client clientfd
 		end
 	end
 end
 
-def sending_ping_messages(context : InstanceStorage)
-	context.fd_to_websocket.each do |fd, ws|
+def sending_ping_messages
+	Context.context.fd_to_websocket.each do |fd, ws|
 		begin
 			ws.ping "hello from #{fd}"
 		rescue e
-			puts "#{CRED}Exception: #{e}#{CRESET}, already closed client #{fd}"
+			Baguette::Log.error "#{CRED}Exception: #{e}#{CRESET}, already closed client #{fd}"
 			begin
-				context.remove_fd fd
+				Context.context.remove_fd fd
 			rescue e
-				puts "#{CRED}Cannot remove #{fd} from clients: #{e}#{CRESET}"
+				Baguette::Log.error "#{CRED}Cannot remove #{fd} from clients: #{e}#{CRESET}"
 			end
 		end
 	end
@@ -354,60 +542,57 @@ end
 
 # Every few seconds, the service should trigger the timer
 # Allowing the sending of Ping messages to clients
-service.base_timer = timer_delay
+Context.service.base_timer = configuration.ipc_timer
 
-service.loop do |event|
-	case event
-	when IPC::Event::Timer
-		if verbosity > 0
-			puts "#{CORANGE}IPC::Event::Timer#{CRESET}"
-		end
-		sending_ping_messages context
-	when IPC::Event::Connection
-		if verbosity > 0
-			puts "#{CBLUE}IPC::Event::Connection#{CRESET}: #{event.fd}"
-		end
-	when IPC::Event::Disconnection
-		if verbosity > 0
-			puts "#{CBLUE}IPC::Event::Disconnection#{CRESET}: #{event.fd}"
-		end
-	when IPC::Event::ExtraSocket
-		if verbosity > 0
-			puts "#{CBLUE}IPC::Event::ExtraSocket#{CRESET}: #{event.fd}"
-		end
+Context.service.loop do |event|
+	begin
+		case event
+		when IPC::Event::Timer
+			Baguette::Log.info "IPC::Event::Timer" if Context.print_timer
+			sending_ping_messages
+		when IPC::Event::Connection
+			Baguette::Log.debug "IPC::Event::Connection: #{event.fd}"
 
-		# 1. accept new websocket clients
-		if server.fd == event.fd
-			client = server.accept
-			begin
-				websocket_client_connection client, context
-				puts "#{CBLUE}new client:#{CRESET} #{client.fd}" unless verbosity == 0
-			rescue e
-				puts "Exception: #{CRED}#{e}#{CRESET}"
-				client.close
+		when IPC::Event::Disconnection
+			Baguette::Log.debug "IPC::Event::Disconnection: #{event.fd}"
+
+		when IPC::Event::ExtraSocket
+			Baguette::Log.debug "IPC::Event::ExtraSocket: #{event.fd}"
+
+			# 1. accept new websocket clients
+			if server.fd == event.fd
+				client = server.accept
+				begin
+					websocket_client_connection client
+					Baguette::Log.info "new client: #{client.fd}"
+				rescue e
+					Baguette::Log.error "Exception: #{e}"
+					client.close
+				end
+				next
 			end
-			next
+
+			# 2. active fd != server fd
+			activefd = event.fd
+			if activefd <= 0
+				Baguette::Log.error "faulty activefd: #{activefd}"
+			end
+			websocket_switching_procedure activefd
+
+		when IPC::Event::Switch
+			Baguette::Log.debug "IPC::Event::Switch: from fd #{event.fd}"
+			raise "Not implemented."
+
+		# IPC::Event::Message has to be the last entry
+		# because ExtraSocket and Switch inherit from Message class
+		when IPC::Event::MessageSent
+			Baguette::Log.error "IPC::Event::MessageSent: #{event.fd}"
+
+		when IPC::Event::MessageReceived
+			Baguette::Log.debug "IPC::Event::MessageReceived: #{event.fd}"
+			raise "Not implemented."
 		end
-
-		# 2. active fd != server fd
-		activefd = event.fd
-		websocket_switching_procedure activefd, context
-
-	when IPC::Event::Switch
-		if verbosity > 0
-			puts "\033[36mIPC::Event::Switch#{CRESET}: from fd #{event.fd}"
-		end
-
-		raise "Not implemented."
-
-	when IPC::Event::MessageSent
-		puts "Message sent, for #{event.origin}"
-
-	when IPC::Event::MessageReceived
-		if verbosity > 0
-			puts "#{CBLUE}IPC::Event::Message#{CRESET}: #{event.fd}"
-		end
-
-		raise "Not implemented."
+	rescue e
+		Baguette::Log.error "IPC loop final catch: #{e}"
 	end
 end

tests/performances/ipc_connection.cr

@@ -5,19 +5,13 @@ require "../test-ws"
 ws_uri = "ws://localhost:1234/pong.JSON"
 
 message = IPC::Message.from_json(%({ "mtype" : 3, "utype" : 30, "payload" : "coucou" }))
-pong = IPC::Connection.new "pong"
 
 Benchmark.ips do |bm|
 	bm.report("connection") do
-		c = IPC::Connection.new "pong"
+		c = IPC::Client.new "pong"
+	end
+
+	bm.report("connection through websocket") do
+		tws = TestWS.new ws_uri
 	end
 end
-
-#puts "sleeping 5 seconds"
-#sleep 5
-#
-#Benchmark.ips do |bm|
-#	bm.report("connection through websocket") do
-#		tws = TestWS.new ws_uri
-#	end
-#end

tests/performances/ipc_message_exchange.cr

@@ -2,25 +2,44 @@ require "benchmark"
 require "ipc"
 require "../test-ws"
 
-ws_uri = "ws://localhost:1234/pong"
+ws_uri      = "ws://localhost:1234/pong"
 ws_uri_json = "ws://localhost:1234/pong.JSON"
+
 ws_pong      = TestWS.new ws_uri
 ws_pong_json = TestWS.new ws_uri_json
 
-pong = IPC::Connection.new "pong"
+pong = IPC::Client.new "pong"
+pong.base_timer = 100_000
+pong.timer      = 100_000
 
 Benchmark.ips do |bm|
 	bm.report("direct: round trip time") do
-		pong.send 42, "coucou"
-		m = pong.read
+		# puts "direct: round trip time"
+		pong.send pong.server_fd.not_nil!, 42, "coucou"
+		::loop do
+			event = pong.wait_event do |event|
+			end
+
+			case event
+			when IPC::Event::MessageSent
+				# OK
+			when IPC::Event::MessageReceived
+				# puts "message received"
+				break
+			else
+				puts "event: #{event}"
+			end
+		end
 	end
 
-	bm.report("web sockets: round trip time") do
-		ws_pong.send 42, "coucou"
-		m = ws_pong.read
-	end
+	#bm.report("web sockets: round trip time") do
+	#	# puts "web sockets: round trip time"
+	#	ws_pong.send 42, "coucou"
+	#	m = ws_pong.read
+	#end
 
 	bm.report("web sockets + json: round trip time") do
+		# puts "web sockets + json: round trip time"
 		ws_pong_json.send 42, "coucou"
 		m = ws_pong_json.read
 	end

tests/test-ws.cr

@@ -10,12 +10,12 @@ require "../src/lib_modifications.cr"
 require "json"
 
 class TestIPC
-	property ipcc : IPC::Connection
+	property ipcc : IPC::Client
 	property is_json : Bool
 
 	def initialize(service_name : String)
 		@is_json = uri.ends_with? ".JSON"
-		@ipcc = IPC::Connection.new service_name
+		@ipcc = IPC::Client.new service_name
 	end
 
 	# TODO
@@ -60,9 +60,9 @@ class TestWS
 		m : String | Bytes
 
 		if @is_json
-			m = IPC::Message.new(1.to_u8, type.to_u8, data).to_json
+			m = IPC::Message.new(0, 1.to_u8, type.to_u8, data).to_json
 		else
-			m = IPC::Message.new(1.to_u8, type.to_u8, data).to_packet
+			m = IPC::Message.new(0, 1.to_u8, type.to_u8, data).to_packet
 		end
 	
 		@ws.send m