Aggiunto file rimasto in locale

diff --git a/listati/TCP_iter_daytimed.c b/listati/TCP_iter_daytimed.c
new file mode 100644 (file)
index 0000000..5f9b116
--- /dev/null
+++ b/listati/TCP_iter_daytimed.c
@@ -0,0 +1,56 @@
+#include <sys/types.h>   /* predefined types */
+#include <unistd.h>      /* include unix standard library */
+#include <arpa/inet.h>   /* IP addresses conversion utilities */
+#include <sys/socket.h>  /* socket library */
+#include <stdio.h>       /* include standard I/O library */
+#include <time.h>
+#define MAXLINE 80
+#define BACKLOG 10
+int main(int argc, char *argv[])
+{
+/* 
+ * Variables definition  
+ */
+    int list_fd, conn_fd;
+    int i;
+    struct sockaddr_in serv_add;
+    char buffer[MAXLINE];
+    time_t timeval;
+    ...
+    /* create socket */
+    if ( (list_fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+        perror("Socket creation error");
+        exit(-1);
+    }
+    /* initialize address */
+    memset((void *)&serv_add, 0, sizeof(serv_add)); /* clear server address */
+    serv_add.sin_family = AF_INET;                  /* address type is INET */
+    serv_add.sin_port = htons(13);                  /* daytime port is 13 */
+    serv_add.sin_addr.s_addr = htonl(INADDR_ANY);   /* connect from anywhere */
+    /* bind socket */
+    if (bind(list_fd, (struct sockaddr *)&serv_add, sizeof(serv_add)) < 0) {
+        perror("bind error");
+        exit(-1);
+    }
+    /* listen on socket */
+    if (listen(list_fd, BACKLOG) < 0 ) {
+        perror("listen error");
+        exit(-1);
+    }
+    /* write daytime to client */
+    while (1) {
+        if ( (conn_fd = accept(list_fd, (struct sockaddr *) NULL, NULL)) <0 ) {
+            perror("accept error");
+            exit(-1);
+        }
+        timeval = time(NULL);
+        snprintf(buffer, sizeof(buffer), "%.24s\r\n", ctime(&timeval));
+        if ( (write(conn_fd, buffer, strlen(buffer))) < 0 ) {
+            perror("write error");
+            exit(-1);
+        }
+        close(conn_fd);
+    }
+    /* normal exit */
+    exit(0);
+}