Thread implementation ALMOST finished

lib.c

@@ -74,7 +74,7 @@ int xbind(const int port){
 	=========================================================*/
 	DEBUG&& debug("xbind", "listen for client");
 
-	if( listen(xsocket, 1) < 0 ){
+	if( listen(xsocket, maxClients) < 0 ){
 		DEBUG&& printf("error\n");
 		return -1;
 	}

lib.h

@@ -10,6 +10,9 @@
 	#define DEBUG		0x1
 	#define DEBUG_LEN	40
 
+	// constants
+	#define maxClients	0x4
+
 
 	#include <stdio.h>
 	#include <stdlib.h>

makefile

@@ -1,4 +1,4 @@
-CC=-Werror -g
+CC=-Werror -g -pthread
 
 
 client.o: client.h client.c

server.c

@@ -6,19 +6,17 @@ int main(int argc, char* argv[]){
 
 	/* [1] Initialisation
 	=========================================================*/
-	/* (1) Socket info */
-	// Client
+	/* (1) Client address + port */
 	struct sockaddr_in addr_client;
-	char client_ip[20];
-	int port; // chosen port
-	// Socket
+	int port;
+
+	/* (2) Sockets */
 	int listensock, datasock;
 
+	/* (3) Struct to send arguments to threadable process */
+	pthread_arg_wrapper built_args = {0, 0};
+
 
-	/* (2) Misc. information */
-	char* to_send = (char*) malloc( BUFSIZE * sizeof(char) );
-	char* to_recv = (char*) malloc( BUFSIZE * sizeof(char) );
-	int bytes; // transfer count
 
 
 	/* [2] Manage arguments
@@ -37,18 +35,6 @@ int main(int argc, char* argv[]){
 		return 1;
 	}
 
-	/* (3) Manage optional @message argument */
-	if( argc >= 3 ){
-
-		if( strlen(argv[2]) > BUFSIZE || sscanf(argv[2], "%s", to_send) <= 0 ){
-			printf("argument error: message must be a string (max: %d characters long)\n", BUFSIZE);
-			return 1;
-		}
-
-	}else
-		strcpy(to_send, "server default message");
-
-
 
 
 	/* [3] Create socket
@@ -63,20 +49,103 @@ int main(int argc, char* argv[]){
 	}
 
 
-	/* [4] Wait for client
+	/* [4] Wait for clients indefinately
 	=========================================================*/
-	/* (1) Listen to incoming connection */
-	datasock = xlisten(listensock, &addr_client);
+	int i, index = -1; // thread index
+	while( 1 ){
+
+		/* (1) Listen for incoming connection */
+		index = -1;
+		DEBUG&& debug("server", "wait for client");
+		datasock = xlisten(listensock, &addr_client);
+
+		/* (2) Manage error */
+		if( datasock == -1 ){
+			DEBUG&& printf("error\n");
+			continue;
+		}
+
+		DEBUG&& printf("done\n");
+
+
+		/* (3) Search for a free manager */
+		DEBUG&& debug("server", "finding free thread");
+		for( i = 0 ; i < maxClients ; i++ )
+
+			if( a_managers[i] == 0 ){
+				index = i;
+				break;
+			}
+
+
+		/* (4) If we haven't found a free manager -> do nothing (john snow) */
+		if( index == -1 ){
+			DEBUG&& printf("not found\n");
+			continue;
+		}
+
+		DEBUG&& printf("found\n");
+
+		/* (5) Build thread arguments */
+		built_args.socket = datasock;
+		built_args.index  = index;
+
+		/* (6) Processing client connection on a new thread */
+		pthread_create(&managers[index], NULL, manageClient, (void*)(intptr_t) &built_args);
+
+		/* (7) Mark the manager as active */
+		a_managers[index] = 1;
+		
 
-	/* (2) Manage error */
-	if( datasock == -1 ){
-		perror("erreur connection client");
-		exit(1);
 	}
 
+	/* [5] Wait for all threads to end
+	=========================================================*/
+	/* (1) Wait for all threads to end properly */
+	for( i = 0 ; i < maxClients ; i++ )
+		pthread_join(managers[i], NULL);
+
+	/* (2) Close listening socket */
+	close(listensock);
+
+	return 0;
+}
 
 
-	/* [5] Wait for data
+
+
+
+
+
+
+
+
+void* manageClient(void* pthread_args){
+
+
+	/* [1] Initialization
+	=========================================================*/
+	/* (1) Initialize socket data */
+	struct sockaddr_in addr_client;
+	char* to_send = (char*) malloc( BUFSIZE * sizeof(char) );
+	char* to_recv = (char*) malloc( BUFSIZE * sizeof(char) );
+	int bytes; // transfer count
+	char client_ip[20];
+
+	/* (2) Fetch arguments */
+	pthread_arg_wrapper* arguments = (pthread_arg_wrapper*) (intptr_t) pthread_args;
+
+	// get client_socket
+	int datasock     = arguments->socket;
+	int thread_index = arguments->index;
+
+	strcpy(to_send, "server default response"); 
+
+
+	DEBUG&& debug("thread", "starting thread");
+	DEBUG&& printf("success[%d]\n", thread_index);
+
+	/* [2] Wait for data
 	=========================================================*/
 	/* (1) wait/read data */
 	bytes = xread(datasock, to_recv, BUFSIZE);
@@ -94,7 +163,8 @@ int main(int argc, char* argv[]){
 	printf("*** received '%s' (%d bytes) from %s:%d\n", to_recv, bytes, client_ip, ntohs(addr_client.sin_port));
 
 
-	/* [6] Send response
+
+	/* [3] Send response
 	=========================================================*/
 	/* (1) Send response */
 	bytes = xwrite(datasock, to_send);
@@ -106,10 +176,13 @@ int main(int argc, char* argv[]){
 	}
 
 
-	/* [6] Close socket
-	=========================================================*/
-	close(datasock);
-	close(listensock);
 
-	return 0;
+	/* [4] End process
+	=========================================================*/
+	/* (1) Close data socket */
+	close(datasock);
+
+	/* (2) Mark manager as inactive again */
+	managers[thread_index] = 0;
+
 }

server.h

@@ -14,9 +14,25 @@
 	#include <sys/socket.h>
 	#include <netinet/in.h>
 	#include <errno.h>
+	#include <pthread.h>
 
 
 	#include "lib.h"
 
+	// DEFINITIONS
+	typedef struct{
+		int socket;
+		int index;
+	} pthread_arg_wrapper;
+	
+
+	// VARIABLES
+	static pthread_t managers[maxClients];       // containa THREADS
+	static int a_managers[maxClients] = {0}; // contains THREADS actifs
+
+	/************************************************
+	****                Signatures               ****
+	************************************************/
+	void* manageClient(void* pthread_args);
 
 #endif