initial commit

7 files changed, 1016 insertions, 0 deletions

diff --git a/build/CMakeCache.txt b/build/CMakeCache.txt
new file mode 100644
index 0000000..4b84043
--- /dev/null
+++ b/build/CMakeCache.txt
@@ -0,0 +1,391 @@
+# This is the CMakeCache file.
+# For build in directory: /fileserver2/home/mjc/git/Instrument/build
+# It was generated by CMake: /usr/bin/cmake
+# You can edit this file to change values found and used by cmake.
+# If you do not want to change any of the values, simply exit the editor.
+# If you do want to change a value, simply edit, save, and exit the editor.
+# The syntax for the file is as follows:
+# KEY:TYPE=VALUE
+# KEY is the name of a variable in the cache.
+# TYPE is a hint to GUI's for the type of VALUE, DO NOT EDIT TYPE!.
+# VALUE is the current value for the KEY.
+
+########################
+# EXTERNAL cache entries
+########################
+
+//Path to a program.
+CMAKE_AR:FILEPATH=/usr/bin/ar
+
+//Choose the type of build, options are: None(CMAKE_CXX_FLAGS or
+// CMAKE_C_FLAGS used) Debug Release RelWithDebInfo MinSizeRel.
+CMAKE_BUILD_TYPE:STRING=
+
+//Enable/Disable color output during build.
+CMAKE_COLOR_MAKEFILE:BOOL=ON
+
+//CXX compiler.
+CMAKE_CXX_COMPILER:FILEPATH=/usr/bin/c++
+
+//Flags used by the compiler during all build types.
+CMAKE_CXX_FLAGS:STRING=
+
+//Flags used by the compiler during debug builds.
+CMAKE_CXX_FLAGS_DEBUG:STRING=-g
+
+//Flags used by the compiler during release minsize builds.
+CMAKE_CXX_FLAGS_MINSIZEREL:STRING=-Os -DNDEBUG
+
+//Flags used by the compiler during release builds (/MD /Ob1 /Oi
+// /Ot /Oy /Gs will produce slightly less optimized but smaller
+// files).
+CMAKE_CXX_FLAGS_RELEASE:STRING=-O3 -DNDEBUG
+
+//Flags used by the compiler during Release with Debug Info builds.
+CMAKE_CXX_FLAGS_RELWITHDEBINFO:STRING=-O2 -g
+
+//C compiler.
+CMAKE_C_COMPILER:FILEPATH=/usr/bin/gcc
+
+//Flags used by the compiler during all build types.
+CMAKE_C_FLAGS:STRING=
+
+//Flags used by the compiler during debug builds.
+CMAKE_C_FLAGS_DEBUG:STRING=-g
+
+//Flags used by the compiler during release minsize builds.
+CMAKE_C_FLAGS_MINSIZEREL:STRING=-Os -DNDEBUG
+
+//Flags used by the compiler during release builds (/MD /Ob1 /Oi
+// /Ot /Oy /Gs will produce slightly less optimized but smaller
+// files).
+CMAKE_C_FLAGS_RELEASE:STRING=-O3 -DNDEBUG
+
+//Flags used by the compiler during Release with Debug Info builds.
+CMAKE_C_FLAGS_RELWITHDEBINFO:STRING=-O2 -g
+
+//Flags used by the linker.
+CMAKE_EXE_LINKER_FLAGS:STRING=' '
+
+//Flags used by the linker during debug builds.
+CMAKE_EXE_LINKER_FLAGS_DEBUG:STRING=
+
+//Flags used by the linker during release minsize builds.
+CMAKE_EXE_LINKER_FLAGS_MINSIZEREL:STRING=
+
+//Flags used by the linker during release builds.
+CMAKE_EXE_LINKER_FLAGS_RELEASE:STRING=
+
+//Flags used by the linker during Release with Debug Info builds.
+CMAKE_EXE_LINKER_FLAGS_RELWITHDEBINFO:STRING=
+
+//Enable/Disable output of compile commands during generation.
+CMAKE_EXPORT_COMPILE_COMMANDS:BOOL=OFF
+
+//Install path prefix, prepended onto install directories.
+CMAKE_INSTALL_PREFIX:PATH=/usr/local
+
+//Path to a program.
+CMAKE_LINKER:FILEPATH=/usr/bin/ld
+
+//Path to a program.
+CMAKE_MAKE_PROGRAM:FILEPATH=/usr/bin/gmake
+
+//Flags used by the linker during the creation of modules.
+CMAKE_MODULE_LINKER_FLAGS:STRING=' '
+
+//Flags used by the linker during debug builds.
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+
+//Flags used by the linker during release minsize builds.
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+
+//Flags used by the linker during release builds.
+CMAKE_MODULE_LINKER_FLAGS_RELEASE:STRING=
+
+//Flags used by the linker during Release with Debug Info builds.
+CMAKE_MODULE_LINKER_FLAGS_RELWITHDEBINFO:STRING=
+
+//Path to a program.
+CMAKE_NM:FILEPATH=/usr/bin/nm
+
+//Path to a program.
+CMAKE_OBJCOPY:FILEPATH=/usr/bin/objcopy
+
+//Path to a program.
+CMAKE_OBJDUMP:FILEPATH=/usr/bin/objdump
+
+//Value Computed by CMake
+CMAKE_PROJECT_NAME:STATIC=glib-sock-serv
+
+//Path to a program.
+CMAKE_RANLIB:FILEPATH=/usr/bin/ranlib
+
+//Flags used by the linker during the creation of dll's.
+CMAKE_SHARED_LINKER_FLAGS:STRING=' '
+
+//Flags used by the linker during debug builds.
+CMAKE_SHARED_LINKER_FLAGS_DEBUG:STRING=
+
+//Flags used by the linker during release minsize builds.
+CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL:STRING=
+
+//Flags used by the linker during release builds.
+CMAKE_SHARED_LINKER_FLAGS_RELEASE:STRING=
+
+//Flags used by the linker during Release with Debug Info builds.
+CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO:STRING=
+
+//If set, runtime paths are not added when installing shared libraries,
+// but are added when building.
+CMAKE_SKIP_INSTALL_RPATH:BOOL=NO
+
+//If set, runtime paths are not added when using shared libraries.
+CMAKE_SKIP_RPATH:BOOL=NO
+
+//Path to a program.
+CMAKE_STRIP:FILEPATH=/usr/bin/strip
+
+//If true, cmake will use relative paths in makefiles and projects.
+CMAKE_USE_RELATIVE_PATHS:BOOL=OFF
+
+//If this value is on, makefiles will be generated without the
+// .SILENT directive, and all commands will be echoed to the console
+// during the make.  This is useful for debugging only. With Visual
+// Studio IDE projects all commands are done without /nologo.
+CMAKE_VERBOSE_MAKEFILE:BOOL=FALSE
+
+//Path to a library.
+GIO_LIBRARY:FILEPATH=/usr/lib64/libgio-2.0.so
+
+//Path to a file.
+GLIB_CONFIG_INCLUDE_DIR:PATH=/usr/lib64/glib-2.0/include
+
+//Path to a file.
+GLIB_INCLUDE_DIR:PATH=/usr/include/glib-2.0
+
+//Path to a library.
+GLIB_LIBRARIES:FILEPATH=/usr/lib64/libglib-2.0.so
+
+//pkg-config executable
+PKG_CONFIG_EXECUTABLE:FILEPATH=/usr/bin/pkg-config
+
+//Value Computed by CMake
+glib-sock-serv_BINARY_DIR:STATIC=/fileserver2/home/mjc/git/Instrument/build
+
+//Value Computed by CMake
+glib-sock-serv_SOURCE_DIR:STATIC=/fileserver2/home/mjc/git/Instrument
+
+
+########################
+# INTERNAL cache entries
+########################
+
+//ADVANCED property for variable: CMAKE_AR
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+//ADVANCED property for variable: CMAKE_BUILD_TOOL
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+//What is the target build tool cmake is generating for.
+CMAKE_BUILD_TOOL:INTERNAL=/usr/bin/gmake
+//This is the directory where this CMakeCache.txt was created
+CMAKE_CACHEFILE_DIR:INTERNAL=/fileserver2/home/mjc/git/Instrument/build
+//Major version of cmake used to create the current loaded cache
+CMAKE_CACHE_MAJOR_VERSION:INTERNAL=2
+//Minor version of cmake used to create the current loaded cache
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+//Patch version of cmake used to create the current loaded cache
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+//Path to cpack program executable.
+CMAKE_CPACK_COMMAND:INTERNAL=/usr/bin/cpack
+//Path to ctest program executable.
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diff --git a/instr-client.c.orig b/instr-client.c.orig
new file mode 100644
index 0000000..d88f654
--- /dev/null
+++ b/instr-client.c.orig
@@ -0,0 +1,143 @@
+#include <stdio.h>
+#include <gio/gio.h>
+#include <string.h>
+#include "response.h"
+#include <stdlib.h>
+#include <strings.h>
+
+static int port = 3333;
+#define BUFSIZE 1024
+
+GMainContext *context=NULL;
+GMainLoop *mainLoop=NULL;
+GSocketConnection * connection = NULL;
+GSocketClient * client = NULL;
+
+char exitTokens[5][7] = {"quit", "exit", "logout", "logoff", "local"};
+
+//helper function to nicely terminate the client
+static void terminate(char *message, int exitCode)
+{
+	g_object_unref(client);
+	g_object_unref(connection);
+	if (message) {
+		g_print("%s\n", message);
+	}
+	exit(exitCode);
+}
+
+//a sort of strncmp but with \n or \r exception
+static gboolean Matches(char *src, char* dst, gssize size)
+{
+	for(; *src != '\0', (size--)>0; src++) {
+		if(g_ascii_toupper(*src) != g_ascii_toupper(*dst)) {
+			return FALSE;
+		}
+		dst++;
+	}
+	for(; *dst != '\0'; dst++)
+		if (*dst != '\r' && *dst != '\n') {
+			return FALSE;
+		}
+
+	return TRUE;
+}
+
+
+//GIOChannel callback
+static gboolean
+stdinAvailable  (GIOChannel *source, GIOCondition condition, gpointer data)
+{
+	char tmp[BUFSIZE];
+	memset(tmp,0,BUFSIZE);
+	int size = read(0, tmp, BUFSIZE);
+	if(size<=0) {
+		return TRUE;
+	}
+
+	//test if we have an exit word
+	int idx=0;
+	for(idx=0; idx<sizeof(exitTokens)/sizeof(exitTokens[0]); idx++) {
+		if(Matches(exitTokens[idx], tmp, strlen(exitTokens[idx]))) {
+			g_socket_close(g_socket_connection_get_socket(connection), NULL);
+			terminate("Goodbye", 0);
+		}
+	}
+
+	//write the message
+	gssize written=0;
+	GPollableOutputStream* out = (GPollableOutputStream*)data;
+	written = g_pollable_output_stream_write_nonblocking(out, tmp, size, NULL, NULL);
+	if (written <=0 || written == G_IO_ERROR_WOULD_BLOCK) {
+		return FALSE;
+	}
+
+	return TRUE;
+}
+
+//callback for server input
+static gboolean cbServerInput(gpointer data, gpointer additional)
+{
+	char buffer[BUFSIZE];
+	gssize size=0;
+	memset(buffer,0,BUFSIZE);
+
+	GPollableInputStream* inStream = (GPollableInputStream*)data;
+
+	size=g_pollable_input_stream_read_nonblocking(inStream, buffer, BUFSIZE, NULL, NULL);
+	if(size <=0 || size == G_IO_ERROR_WOULD_BLOCK) {
+		terminate("Connection to server lost", -1);
+	}
+	g_print("\n%s", buffer);
+	g_print("> ");
+	return TRUE;
+}
+
+int main(int argc, char** argv)
+{
+	/* create a new connection */
+	g_type_init ();
+
+	GOutputStream *out;
+	GInputStream *in;
+	GError* error = NULL;
+	GIOChannel* stdinChannel = NULL;
+	client = g_socket_client_new();
+	GSource *source = NULL;
+
+	/* connect to the host */
+	connection = g_socket_client_connect_to_host (client,
+	             (gchar*)"localhost",
+	             port,
+	             NULL,
+	             &error);
+
+	if (error != NULL) {
+		g_print("Could not connect to server on port %d\n", port);
+		g_object_unref(client);
+		return -1;
+	}
+	g_print("> ");
+
+
+	//register Pollable sources
+	out = g_io_stream_get_output_stream (G_IO_STREAM (connection));
+	in = g_io_stream_get_input_stream (G_IO_STREAM (connection));
+	GSource *outSource = NULL;
+	GSource *inSource = g_pollable_input_stream_create_source((struct GPollableInputStream*)in, NULL);
+	outSource = g_pollable_output_stream_create_source((struct GPollableOutputStream*)out, NULL);
+
+	//register stdin channel
+	stdinChannel = g_io_channel_unix_new(0);
+	if(stdinChannel == NULL) {
+		terminate("Could not open STDIN channel", -2);
+	}
+
+	//attach the sources
+	g_io_add_watch(stdinChannel, G_IO_IN, stdinAvailable, (struct GPollableOutputStream*)out);
+	g_source_set_callback(inSource, cbServerInput, (GPollableOutputStream*)in, NULL);
+
+	g_source_attach(inSource, NULL);
+	g_main_loop_run (g_main_loop_new (NULL, FALSE));
+	return 0;
+}
\ No newline at end of file
diff --git a/instr-daemon.c.orig b/instr-daemon.c.orig
new file mode 100644
index 0000000..0f07d16
--- /dev/null
+++ b/instr-daemon.c.orig
@@ -0,0 +1,273 @@
+#include "socket-common.h"
+#include "response.h"
+#include <stdlib.h>
+#include <ctype.h>
+
+#define STDIN_BUF_SIZE 1024
+
+int port=3333; //port to listen
+int connections=0;
+int maxConn=16; //max connections - 16
+
+guint signalMyCb; //signal to register which is used in cbClientInput(), step 10 from requirements
+GAsyncQueue** stdinQueue=NULL;
+GThread **peers; //actual connected peers
+
+
+//GIOChannel callback for stdin
+static gboolean
+stdinAvailable  (GIOChannel *source, GIOCondition condition, gpointer data)
+{
+	static char* buffer=NULL;
+	static gint64 allocated=0;
+	GAsyncQueue* queue=NULL;
+	
+	//temporary buffer to read from stdin
+	char tmp[STDIN_BUF_SIZE];
+	memset(tmp,0,STDIN_BUF_SIZE);
+	
+	int size = read(0, tmp, STDIN_BUF_SIZE);
+	if(size<=0) return TRUE;
+	
+	//fix for \n or \r sending
+	if(size ==1) 
+		if(tmp[0] == '\r' || tmp[0] == '\n') return TRUE;
+	
+	//the termination characters
+	if(!strncmp(tmp, "..", size-1)) 
+	{
+		//final reallocation of the buffer to accomodate the whole string
+		buffer=realloc(buffer,allocated+1);
+		buffer[allocated] = '\0';
+		int idx=0;
+		
+		g_print_debug("Got the buffer: \"%s\", tid: %p\n", buffer, g_thread_self());
+		
+		if (tmp[0] == '.' && tmp[1] == '.') //fix for single dot sending
+		{
+			int count=0;
+		
+			//send the final buffer to the queue
+			for(count=0; count<maxConn; count++)
+			{
+				//allocate on the heap and deallocate in response.c, cbClientOutput()
+				char *toSend = realloc(NULL, allocated+1);
+				memcpy(toSend, buffer, allocated+1);
+				
+				//make sure we send to only valid peers
+				if(peers[count] != 0)
+					g_async_queue_push(stdinQueue[count], toSend);
+			}	
+			
+			//free the buffer
+			free(buffer); 
+			buffer=NULL;
+			allocated=0;
+			return TRUE;
+		}
+	}
+	
+	//allocate on the heap. buffer is NULL the first time
+	buffer=realloc(buffer, allocated+size);
+	memcpy(buffer+allocated, tmp, size);
+	allocated += size; //keep track of allocation
+	 
+	
+	return TRUE;
+}
+
+/** pulls an integer position from the vector which contains the 
+	position to use for the stdinQueue vector
+	@param id - the thread id
+*/
+static int pullIndex(GThread* id)
+{
+	int i=0,ret=-1;
+	static GStaticMutex mutex = G_STATIC_MUTEX_INIT;
+	g_static_mutex_lock (&mutex);
+	for(i=0; i<maxConn; i++)
+		if(peers[i] == id)
+		{
+			peers[i] = (GThread*)0;
+			ret=i;
+			break;
+		}
+	g_static_mutex_unlock (&mutex);
+	return ret;
+}
+
+/**
+ * pushed in the peers vector the thread id for future reference
+ * @param id
+ */
+static int pushIndex(GThread* id)
+{
+	int i=0,ret=-1;
+	static GStaticMutex mutex = G_STATIC_MUTEX_INIT;
+	g_static_mutex_lock (&mutex);
+	for(i=0; i<maxConn; i++)
+		if(peers[i] == 0) 
+		{ 
+			peers[i] = id;
+			ret=i;
+			break;
+		}
+		
+	g_static_mutex_unlock (&mutex);
+	return ret;
+}
+
+//handler for incoming connection, closes the connection if maxCon connections are already handled
+static gboolean
+incomingConnection (GSocketService *service,
+         GSocketConnection      *connection,
+         GSocketListener        *listener,
+         gpointer                user_data)
+{
+  if(connections +1 > maxConn) 
+  {
+	g_print_debug("Connection closed. Max reached\n");
+	return TRUE;
+  }
+  connections++;
+  g_print_debug("Incoming connection\n");
+  return FALSE;
+}
+
+
+//thread connection handler
+static gboolean
+handler (GThreadedSocketService *service,
+         GSocketConnection      *connection,
+         GSocketListener        *listener,
+         gpointer                user_data)
+{
+  
+
+  GOutputStream *out;
+  GInputStream *in;
+  gssize size;
+
+  
+  out = g_io_stream_get_output_stream (G_IO_STREAM (connection));
+  in = g_io_stream_get_input_stream (G_IO_STREAM (connection));
+
+  g_print_debug("Handling, connections: %d\n", connections);
+  
+  //register ourselves in the peers vector, use the index obtained in the stdinQueue
+  //should not get -1
+  GThread* self = g_thread_self();
+  int index=pushIndex(self);
+  
+  GSource *outSource = NULL;
+  GSource *inSource = g_pollable_input_stream_create_source((struct GPollableInputStream*)in, NULL);
+  
+  //get a reference to the async queue
+  GAsyncQueue *queue = g_async_queue_ref(stdinQueue[index]);
+  
+  //input from client
+  g_source_set_callback(inSource, cbClientInput, (GPollableOutputStream*)out, NULL);
+  g_source_attach(inSource, NULL);  
+  
+  //keep thread alive, every 1000 microseconds
+  while(g_source_is_destroyed(inSource)==FALSE) 
+	{ 
+		g_usleep(1000); 
+		gint elems;
+		
+		//verify our queue length and activate/deactivate the "out" Source for this connection
+		//if we don't do this, the out Source will be scheduled frequently and will busy loop
+		if((elems=g_async_queue_length(queue))>0) 
+		{	
+			if(outSource == NULL)
+			{
+				
+				outSource = g_pollable_output_stream_create_source((struct GPollableOutputStream*)out, NULL);
+				g_source_set_callback(outSource, cbClientOutput, queue, NULL);	
+				g_source_attach(outSource, NULL);
+			}
+			else
+			{
+				g_source_destroy(outSource);
+				g_source_unref(outSource);
+				outSource = NULL;
+			}
+			
+		}
+		else
+		{
+			if(outSource!= NULL && !g_source_is_destroyed(outSource))
+			{
+				g_print_debug("Destroy source\n");
+				g_source_destroy(outSource);
+				g_source_unref(outSource);
+				outSource = NULL; //added
+			}
+		}
+		//end of activate/deactivate
+	}
+	
+  //reached the end of the thread
+  if (g_output_stream_close(out, NULL, NULL) == FALSE)
+	  g_print_debug("out not closed\n");
+  if (g_input_stream_close(in, NULL, NULL) == FALSE)
+	  g_print_debug("in not closed\n");
+  
+  g_print_debug("Thread end\n");
+  connections--; //keep track of connections
+  g_async_queue_unref(queue); //unreference the queue
+  pullIndex(g_thread_self()); //unregister from the peers vector
+  return TRUE;
+}
+
+int main(int argc, char **argv) 
+{
+	GSocketService *service = NULL;
+	GError *error = NULL;
+	GIOChannel* stdinChannel = NULL;
+
+	g_type_init ();
+	
+	//register stdin channel
+    stdinChannel = g_io_channel_unix_new(0);
+    if(stdinChannel == NULL) { g_printerr("No io channel\n"); exit(-1); }
+    g_io_add_watch(stdinChannel, G_IO_IN, stdinAvailable, NULL);
+    int idx=0;
+ 
+	//allocate a maxConn queue on the heap
+    stdinQueue = malloc(sizeof(struct GAsyncQueue*) * maxConn);
+	//allocate peers vector on the heap
+	peers = malloc(sizeof(GThread*) * maxConn);
+    for(idx=0;idx<maxConn;idx++) 
+	{
+		peers[idx] = 0;
+		stdinQueue[idx] = g_async_queue_new();
+	}
+   
+   //create a threaded service
+    service = g_threaded_socket_service_new (maxConn+1);
+    if (!g_socket_listener_add_inet_port (G_SOCKET_LISTENER (service),
+					port,
+					NULL,
+					&error))
+    {
+      g_printerr ("%s: %s\n", argv[0], error->message);
+      free(stdinQueue);
+	  free(peers);
+      return 1;
+    }
+    
+    //init the signal signalMyCb
+    initSignals(&signalMyCb);
+    
+    g_print_debug("Server listening on port %d\n", port);
+    g_signal_connect (service, "run", G_CALLBACK (handler), NULL);
+    g_signal_connect (service, "incoming", G_CALLBACK(incomingConnection), NULL);
+	
+    g_main_loop_run (g_main_loop_new (NULL, FALSE));
+    free(stdinQueue);
+	free(peers);
+	
+    return 0;
+   
+}
diff --git a/response.c.orig b/response.c.orig
new file mode 100644
index 0000000..93d38b3
--- /dev/null
+++ b/response.c.orig
@@ -0,0 +1,109 @@
+#include "response.h"
+#include "socket-common.h"
+#include <string.h>
+
+//RESPONSE related functions from the server
+
+extern guint signalMyCb; //signal id
+extern GAsyncQueue* stdinQueue; //our queue
+SignalObject* signalObject; //the signal object which registered the signal id
+
+//write output to client
+static gssize writeOutput(GPollableOutputStream* stream, gchar* data, gssize size);
+
+//callback for client output, this is where the queue messages are sent to the client
+gboolean cbClientOutput(gpointer data, gpointer additional)
+{
+	GPollableOutputStream* outStream = (GPollableOutputStream*)data;
+	GAsyncQueue* queue = (GAsyncQueue*)additional;
+	if(g_async_queue_length(queue) <= 0) return FALSE;
+
+	gpointer elem;
+	g_print_debug("Try pop\n");
+	//try to pop an element from the queue
+	elem=g_async_queue_try_pop(queue);
+	g_print_debug("after pop\n");
+	if(elem)
+	{
+		char* buf = (char*)elem;
+		g_print_debug("Extracted %s\n", buf);
+		gssize size = strlen(buf);
+		gssize written = 0;
+		
+		written=g_pollable_output_stream_write_nonblocking(outStream, buf, size+1, NULL, NULL);
+		if(written==-1) g_printerr("Could not write to client\n");
+		
+		//free the alloc'ed memory
+		free(buf);
+	}
+	
+	return FALSE;
+}
+
+//the client input callback
+gboolean cbClientInput(gpointer data, gpointer additional)
+{
+
+	char buffer[1024];
+	gssize size=0;
+	memset(buffer,0,1024);
+	
+	GPollableInputStream* inStream = (GPollableInputStream*)data;
+	GPollableOutputStream* outStream = (GPollableOutputStream*)additional;
+	
+	size=g_pollable_input_stream_read_nonblocking(inStream, buffer, 1024, NULL, NULL);
+	if(size <=0 || size == G_IO_ERROR_WOULD_BLOCK) { g_print_debug("Got: %d\n", size); return FALSE; }
+
+	//emit a signal which calls the echoCb function
+	SignalObjectClass myStruct;
+	myStruct.instance = NULL;
+	myStruct.cb = writeOutput;
+	myStruct.data = buffer;
+	myStruct.size = size;
+	myStruct.inStream = inStream;
+	myStruct.outStream = outStream;
+	g_signal_emit(signalObject, signalMyCb, 0, &myStruct, NULL); 
+	
+	return TRUE;
+}
+
+//write output to client
+static gssize writeOutput(GPollableOutputStream* stream, gchar* data, gssize size)
+{
+	gssize what=0;
+	what=g_pollable_output_stream_write_nonblocking(stream, data, size, NULL, NULL);
+	if(what < 0 || what == G_IO_ERROR_WOULD_BLOCK) { return -1; }
+	return what;
+}
+
+//initialize the signals
+void initSignals(guint *signal)
+{
+	*signal = g_signal_new("runEchoService", SIGNAL_OBJECT_TYPE, G_SIGNAL_RUN_FIRST, 0, NULL, NULL,  
+						   g_cclosure_marshal_VOID__POINTER , G_TYPE_NONE, 1, G_TYPE_POINTER);
+	
+	signalObject = g_object_new(SIGNAL_OBJECT_TYPE, NULL);
+	g_signal_connect (signalObject, "runEchoService", G_CALLBACK (echoCb), NULL);
+}
+
+//echo 3 times and send to client one time
+void echoCb(gpointer instance, GObject *arg1, gpointer user_data)
+{
+	static GStaticMutex mutex = G_STATIC_MUTEX_INIT;
+	g_static_mutex_lock (&mutex);
+	SignalObjectClass *data = (SignalObjectClass*)arg1;
+	GPollableOutputStream* stream = (GPollableOutputStream*)data->outStream;
+	gchar* str = data->data;
+	gssize len = data->size;
+	gssize written = 0;
+	
+	gchar* upper = g_ascii_strup(str, len);
+	int i;
+	for(i=0; i<3; i++) g_print("%s\n", upper);
+	//send response back to client	
+
+	written = data->cb(stream, upper, len);
+	
+	g_free(upper); 
+	g_static_mutex_unlock (&mutex);
+}
diff --git a/response.h.orig b/response.h.orig
new file mode 100644
index 0000000..7b6301a
--- /dev/null
+++ b/response.h.orig
@@ -0,0 +1,18 @@
+#include <gio/gio.h>
+#include <glibconfig.h>
+#include <glib.h>
+#include "signalobject.h"
+
+
+typedef struct _streamStruct
+{
+	GPollableInputStream* in;
+	GPollableOutputStream* out;
+} streamStruct;
+
+void echoCb(gpointer instance, GObject *arg1, gpointer user_data);
+
+gboolean cbClientInput(gpointer data, gpointer additional);
+gboolean cbClientOutput(gpointer data, gpointer additional);
+void initSignals(guint *signal);
+void echoCb(gpointer instance, GObject *arg1, gpointer user_data);
\ No newline at end of file
diff --git a/signalobject.c.orig b/signalobject.c.orig
new file mode 100644
index 0000000..68003fe
--- /dev/null
+++ b/signalobject.c.orig
@@ -0,0 +1,38 @@
+#include "signalobject.h"
+
+G_DEFINE_TYPE (SignalObject, signal_object, G_TYPE_OBJECT);
+
+static GObject *
+signal_object_constructor (GType                  gtype,
+							guint                  n_properties,
+							GObjectConstructParam *properties)
+{
+  GObject *obj;
+
+  {
+    /* Always chain up to the parent constructor */
+    obj = G_OBJECT_CLASS (signal_object_parent_class)->constructor (gtype, n_properties, properties);
+  }
+  
+  /* update the object state depending on constructor properties */
+
+  return obj;
+}
+
+
+static void
+signal_object_class_init (SignalObjectClass *klass)
+{
+  GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
+
+  gobject_class->constructor = signal_object_constructor;
+}
+
+
+static void
+signal_object_init (SignalObject *self)
+{
+  /* initialize the object */
+}
+
+
diff --git a/signalobject.h.orig b/signalobject.h.orig
new file mode 100644
index 0000000..8863086
--- /dev/null
+++ b/signalobject.h.orig
@@ -0,0 +1,44 @@
+#ifndef SIGNAL_OBJECT_H
+#define SIGNAL_OBJECT_H
+
+#include <gio/gio.h>
+#include <glibconfig.h>
+#include <glib.h>
+
+
+#define SIGNAL_OBJECT_TYPE                  (signal_object_get_type ())
+/*
+#define MAMAN_BAR(obj)                  (G_TYPE_CHECK_INSTANCE_CAST ((obj), MAMAN_TYPE_BAR, MamanBar))
+#define MAMAN_IS_BAR(obj)               (G_TYPE_CHECK_INSTANCE_TYPE ((obj), MAMAN_TYPE_BAR))
+#define MAMAN_BAR_CLASS(klass)          (G_TYPE_CHECK_CLASS_CAST ((klass), MAMAN_TYPE_BAR, MamanBarClass))
+#define MAMAN_IS_BAR_CLASS(klass)       (G_TYPE_CHECK_CLASS_TYPE ((klass), MAMAN_TYPE_BAR))
+#define MAMAN_BAR_GET_CLASS(obj)        (G_TYPE_INSTANCE_GET_CLASS ((obj), MAMAN_TYPE_BAR, MamanBarClass))
+*/
+
+typedef struct _SignalObject        SignalObject;
+typedef struct _SignalObjectClass   SignalObjectClass;
+
+
+struct _SignalObject
+{
+	GObject parentInstance;
+	gpointer instance;
+	gssize (*cb)(GPollableOutputStream* stream, gchar* data, gssize size);
+	GPollableInputStream* inStream;
+	GPollableOutputStream* outStream;
+	gchar* data;
+	gssize size;
+};
+
+struct _SignalObjectClass
+{
+	GObjectClass parent_class;	
+	gpointer instance;
+	gssize (*cb)(GPollableOutputStream* stream, gchar* data, gssize size);
+	GPollableInputStream* inStream;
+	GPollableOutputStream* outStream;
+	gchar* data;
+	gssize size;
+};
+
+#endif