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--- studia:magisterskie:1sem:systemy_rownolegle_i_rozproszone [2016/05/19 10:26]
149.156.112.6 [Client C]
+++ studia:magisterskie:1sem:systemy_rownolegle_i_rozproszone [2016/05/19 11:13] (aktualna)
149.156.112.6 [tmp/opencl_mat_transp/mat_transp/mat_transp.c]
@@ Linia 2780: / Linia 2780: @@
 }</code>
+==== Kod wogu ====
+=== server.c ====
+<code c>
+/*
+    C socket server example, handles multiple clients using threads
+    Compile
+    gcc server.c -lpthread -o server
+*/
+#include<stdio.h>
+#include<string.h>    //strlen
+#include<stdlib.h>    //strlen
+#include<sys/socket.h>
+#include<arpa/inet.h> //inet_addr
+#include<unistd.h>    //write
+#include<pthread.h> //for threading , link with lpthread
+#include <unistd.h>
+//the thread function
+void *connection_handler(void *);
+int main(int argc , char *argv[])
+{
+    int counter = 0;
+    pid_t pid = fork();
+    if (pid == 0)
+    {
+       	    int sock;
+	    struct sockaddr_in server;
+	    char message[1000] , server_reply[2000];
+            int counter;
+	    unsigned int ip[] = { 192, 168, 102, 1 };
+            char* ip_final;
+		char *buf;
+		size_t sz;
+	    //Create socket
+            for ( counter = 0; counter < 255; ++counter ) {
+		    sock = socket(AF_INET , SOCK_STREAM , 0);
+		    if (sock == -1)
+		    {
+			printf("Could not create socket");
+		    }
+		    puts("Socket created");
+		    //printf("192.168.102.%d", counter);
+		sz = snprintf(NULL, 0, "192.168.102.%d", counter);
+		buf = (char *)malloc(sz + 1); /* make sure you check for != NULL in real code */
+		    server.sin_addr.s_addr = inet_addr(buf);
+		    server.sin_family = AF_INET;
+		    server.sin_port = htons( 65001 );
+		    //Connect to remote server
+		    if (connect(sock , (struct sockaddr *)&server , sizeof(server)) < 0)
+		    {
+			perror("connect failed. Error");
+			continue;
+		    }
+		    puts("Connected\n");
+		    //keep communicating with server
+		    while(1)
+		    {
+			//Send some data
+			if( send(sock , "Werset 6-client" , 15 , 0) < 0)
+			{
+			    puts("Send failed");
+			    return 1;
+			}
+			//Receive a reply from the server
+			if( recv(sock , server_reply , 2000 , 0) < 0)
+			{
+			    puts("recv failed");
+			    break;
+			}
+			puts(server_reply);
+			break;
+		    }
+		    close(sock);
+           }
+    }
+    else if (pid > 0)
+    {
+        int socket_desc , client_sock , c;
+	    struct sockaddr_in server , client;
+	    //Create socket
+	    socket_desc = socket(AF_INET , SOCK_STREAM , 0);
+	    if (socket_desc == -1)
+	    {
+		printf("Could not create socket");
+	    }
+	    puts("Socket created");
+	    //Prepare the sockaddr_in structure
+	    server.sin_family = AF_INET;
+	    server.sin_addr.s_addr = INADDR_ANY;
+	    server.sin_port = htons( 65001 );
+	    //Bind
+	    if( bind(socket_desc,(struct sockaddr *)&server , sizeof(server)) < 0)
+	    {
+		//print the error message
+		perror("bind failed. Error");
+		return 1;
+	    }
+	    puts("bind done");
+	    //Listen
+	    listen(socket_desc , 3);
+	    //Accept and incoming connection
+	    puts("Waiting for incoming connections...");
+	    c = sizeof(struct sockaddr_in);
+	    //Accept and incoming connection
+	    puts("Waiting for incoming connections...");
+	    c = sizeof(struct sockaddr_in);
+		pthread_t thread_id;
+	    while( (client_sock = accept(socket_desc, (struct sockaddr *)&client, (socklen_t*)&c)) )
+	    {
+		puts("Connection accepted");
+		if( pthread_create( &thread_id , NULL ,  connection_handler , (void*) &client_sock) < 0)
+		{
+		    perror("could not create thread");
+		    return 1;
+		}
+		//Now join the thread , so that we dont terminate before the thread
+		//pthread_join( thread_id , NULL);
+		puts("Handler assigned");
+	    }
+	    if (client_sock < 0)
+	    {
+		perror("accept failed");
+		return 1;
+	    }
+    }
+    else
+    {
+        // fork failed
+        printf("fork() failed!\n");
+        return 1;
+    }
+    return 0;
+}
+/*
+ * This will handle connection for each client
+ * */
+void *connection_handler(void *socket_desc)
+{
+    //Get the socket descriptor
+    int sock = *(int*)socket_desc;
+    int read_size;
+    char *message , client_message[2000];
+    //Receive a message from client
+    while( (read_size = recv(sock , client_message , 2000 , 0)) > 0 )
+    {
+	printf("%s\n", client_message);
+	//end of string marker
+	client_message[read_size] = '\0';
+	//Send the message back to client
+	write(sock , "Werset 6" , 8);
+	//clear the message buffer
+	memset(client_message, 0, 2000);
+    }
+    if(read_size == 0)
+    {
+        puts("Client disconnected");
+        fflush(stdout);
+    }
+    else if(read_size == -1)
+    {
+        perror("recv failed");
+    }
+    return 0;
+}</code>
+=== Makefile ===
+<code bash># kompilator c
+CC = gcc
+# konsolidator
+CFLAGS=-g
+all: server client
+server: server.o
+	$(CC) $(LFLAGS) server.o -lpthread -o server
+server.o: server.c
+	$(CC) -c server.c -o server.o
+client: client.o
+	$(CC) client.o -o client
+client.o: client.c
+	$(CC) -c client.c -o client.o
+clean:
+	rm -f *.o</code>
 ===== Zajęcia 9 =====
 <code c>/*
@@ Linia 2871: / Linia 3093: @@
     int read_size;
     char *message , client_message[2000];
-    //Send some messages to the client
-    message = "Greetings! I am your connection handler\n";
-    write(sock , message , strlen(message));
-    message = "Now type something and i shall repeat what you type \n";
-    write(sock , message , strlen(message));
     //Receive a message from client
     while( (read_size = recv(sock , client_message , 2000 , 0)) > 0 )
     {
-        //end of string marker
+	//end of string marker
-		client_message[read_size] = '\0';
+	client_message[read_size] = '\0';
-		//Send the message back to client
+	//Send the message back to client
-        write(sock , client_message , strlen(client_message));
+	write(sock , "Werset 6" , strlen(client_message));
-		//clear the message buffer
+	//clear the message buffer
-		memset(client_message, 0, 2000);
+	memset(client_message, 0, 2000);
     }
@@ Linia 2966: / Linia 3181: @@
     return 0;
 }</code>
+==== Kod Maciek Gonzo itp ====
+<code c>
+#include<stdio.h>
+#include<string.h>    //strlen
+#include<stdlib.h>    //strlen
+#include<sys/socket.h>
+#include<arpa/inet.h> //inet_addr
+#include<unistd.h>    //write
+#include<pthread.h> //for threading , link with lpthread
+//the thread function
+void *connection_handler(void *);
+void *client_function(void *socket_desc){
+  int sock;
+    struct sockaddr_in server_id;
+    char message[1000] , server_reply[2000];
+    //Create socket
+    sock = socket(AF_INET , SOCK_STREAM , 0);
+    if (sock == -1)
+    {
+        printf("Could not create socket");
+    }
+    puts("Socket created");
+     // 192.168.102.63 wogu
+    server_id.sin_addr.s_addr = inet_addr("localhost");
+    server_id.sin_family = AF_INET;
+    server_id.sin_port = htons( 65000 );
+    //Connect to remote server
+    if (connect(sock , (struct sockaddr *)&server_id , sizeof(server_id)) < 0)
+    {
+        perror("connect failed. Error");
+    }else{
+    puts("Connected\n");
+    //keep communicating with server
+    while(1)
+    {
+        printf("Enter message : ");
+        scanf("%s" , message);
+        //Send some data
+        if( send(sock , message , strlen(message) , 0) < 0)
+        {
+            puts("Send failed");
+        }
+        //Receive a reply from the server
+        if( recv(sock , server_reply , 2000 , 0) < 0)
+        {
+            puts("recv failed");
+            break;
+        }
+        puts("Server reply :");
+        puts(server_reply);
+    }
+    close(sock);
+}
+};
+void *server_function(void * sock){
+    printf("SERVER Start");
+fflush(stdout);
+    int socket_desc , client_sock , c;
+    pthread_t thread_id;
+    struct sockaddr_in server , client;
+    //Create socket
+    socket_desc = socket(AF_INET , SOCK_STREAM , 0);
+    if (socket_desc == -1)
+    {
+        printf("Could not create socket");
+    }
+    puts("Socket created");
+    //Prepare the sockaddr_in structure
+    server.sin_family = AF_INET;
+    server.sin_addr.s_addr = INADDR_ANY;
+    server.sin_port = htons( 65000);
+    //Bind
+    if( bind(socket_desc,(struct sockaddr *)&server , sizeof(server)) < 0)
+    {
+        //print the error message
+        perror("bind failed. Error");
+        return;
+    }
+    puts("bind done");
+    //Listen
+    listen(socket_desc , 3);
+    //Accept and incoming connection
+    puts("Waiting for incoming connections...");
+    c = sizeof(struct sockaddr_in);
+fflush(stdout);
+    while( (client_sock = accept(socket_desc, (struct sockaddr *)&client, (socklen_t*)&c)) )
+    {
+        puts("Connection accepted");
+        if( pthread_create( &thread_id , NULL ,  connection_handler , (void*) &client_sock) < 0)
+        {
+            perror("could not create thread");
+            return;
+        }
+        //Now join the thread , so that we dont terminate before the thread
+        //pthread_join( thread_id , NULL);
+        puts("Handler assigned");
+    }
+    if (client_sock < 0)
+    {
+        perror("accept failed");
+        return;
+    }
+}
+int main(int argc , char *argv[])
+{
+    pthread_t thread_id;
+//Create server
+        if( pthread_create( &thread_id , NULL ,  server_function , NULL) != 0)
+        {
+            perror("could not create server thread");
+	    fflush(stdout);
+            return 1;
+        }
+    pthread_t thread_id2;
+	// Create client
+        if( pthread_create( &thread_id2 , NULL ,  client_function , NULL) != 0)
+        {
+            perror("could not create client thread");
+	    fflush(stdout);
+            return 1;
+        }
+    return 0;
+}
+/*
+ * This will handle connection for each client
+ * */
+void *connection_handler(void *socket_desc)
+{
+    //Get the socket descriptor
+    int sock = *(int*)socket_desc;
+    int read_size;
+    char *message , client_message[2000];
+    //Receive a message from client
+    while( (read_size = recv(sock , client_message , 2000 , 0)) > 0 )
+    {
+        //end of string marker
+		client_message[read_size] = '\0';
+		//Send the message back to client
+        write(sock , "Werset 5" , strlen(client_message));
+		//clear the message buffer
+		memset(client_message, 0, 2000);
+    }
+    if(read_size == 0)
+    {
+        puts("Client disconnected");
+        fflush(stdout);
+    }
+    else if(read_size == -1)
+    {
+        perror("recv failed");
+    }
+    return 0;
+}
+</code>

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