Implementato alcuni server ricorsivi ed errori

11.client-server-test-error- read write on closed socket/daytimesrv.c

@@ -0,0 +1,63 @@
+
+
+#include	"../basic.h"
+#include	<time.h>
+
+int main(int argc, char **argv) {
+	int			listenfd, connfd, n;
+	struct sockaddr_in	servaddr;
+	char			buff[INET_ADDRSTRLEN];
+	short			port;
+
+	if (argc != 2 ){
+		printf("usage: daytimesrv <porta>\n");
+		exit(0);
+}
+	if( (listenfd = socket(AF_INET, SOCK_STREAM, 0)) < 0){
+		printf("socket error\n");
+		exit(0);
+}
+	bzero(&servaddr, sizeof(servaddr));
+	servaddr.sin_family      = AF_INET;
+	servaddr.sin_addr.s_addr = htonl(INADDR_ANY);   /* wildcard address */
+	servaddr.sin_port        = htons(atoi(argv[1])); /* server port */
+
+	if( (bind(listenfd, (struct sockaddr *) &servaddr, sizeof(servaddr))) < 0){
+		printf("bind error\n"); exit(0);
+}
+	if( listen(listenfd, 5) < 0 )
+		{ printf("listen error\n");
+		  exit(0);
+		}
+
+	struct sockaddr_in	client_addr;
+	unsigned int client_addr_len = sizeof(client_addr);
+	
+	struct sockaddr_in	server_local_addr;
+	unsigned int server_local_addr_len = sizeof(server_local_addr);
+	
+	char * socket_buffer = (char *) malloc (server_local_addr_len) ;
+	
+	
+
+	for ( ; ; ) {
+		if( (connfd = accept(listenfd, (struct sockaddr *) &client_addr, &client_addr_len)) < 0)
+		{ printf("accept error\n");
+		exit(0);
+		} 
+
+		inet_ntop(AF_INET, &(client_addr.sin_addr), buff, INET_ADDRSTRLEN);// get client ip
+		port = ntohs(client_addr.sin_port);// get client port
+		
+		fprintf (stdout,"%s%c%hu\n",buff,':',port);
+		
+		
+		
+		getsockname (connfd, (struct sockaddr *) &server_local_addr, &server_local_addr_len);
+		memcpy (socket_buffer, &server_local_addr, server_local_addr_len);
+		write (connfd,socket_buffer, server_local_addr_len);
+		
+		
+		close(connfd);
+	}
+}