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[gapil.git] / listati / TCP_cunc_daytimed.c

diff --git a/listati/TCP_cunc_daytimed.c b/listati/TCP_cunc_daytimed.c
new file mode 100644 (file)
index 0000000..9af8cc7
--- /dev/null
+++ b/listati/TCP_cunc_daytimed.c
@@ -0,0 +1,52 @@
+#include <sys/types.h>   /* predefined types */
+#include <unistd.h>      /* include unix standard library */
+#include <arpa/inet.h>   /* IP addresses conversion utililites */
+#include <sys/socket.h>  /* socket library */
+#include <stdio.h>       /* include standard I/O library */
+#include <time.h>
+
+int main(int argc, char *argv[])
+{
+    int list_fd, conn_fd;
+    int i;
+    struct sockaddr_in serv_add, client;
+    char buffer[MAXLINE];
+    socklen_t len;
+    time_t timeval;
+    pid_t pid;
+    int logging=0;
+     ...
+    /* write daytime to client */
+    while (1) {
+        if ( (conn_fd = accept(list_fd, (struct sockaddr *)&client, &len)) 
+             <0 ) {
+            perror("accept error");
+            exit(-1);
+        }
+        /* fork to handle connection */
+        if ( (pid = fork()) < 0 ){
+            perror("fork error");
+            exit(-1);
+        }
+        if (pid == 0) {                 /* child */
+            close(list_fd);
+            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);
+            }
+            if (logging) {
+                inet_ntop(AF_INET, &client.sin_addr, buffer, sizeof(buffer));
+                printf("Request from host %s, port %d\n", buffer,
+                       ntohs(client.sin_port));
+            }
+            close(conn_fd);
+            exit(0);
+        } else {                        /* parent */
+            close(conn_fd);
+        }
+    }
+    /* normal exit, never reached */
+    exit(0);
+}