Finita la conversione dei listati in file separati. Passato anche alla nuova

[gapil.git] / listati / ElemEchoTCPServer.c

diff --git a/listati/ElemEchoTCPServer.c b/listati/ElemEchoTCPServer.c
new file mode 100644 (file)
index 0000000..a434957
--- /dev/null
+++ b/listati/ElemEchoTCPServer.c
@@ -0,0 +1,52 @@
+/* Subroutines declaration */
+void ServEcho(int sockfd);
+/* Program beginning */
+int main(int argc, char *argv[])
+{
+    int list_fd, conn_fd;
+    pid_t pid;
+    struct sockaddr_in serv_add;
+     ...
+    /* 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);
+    }
+    /* handle echo to client */
+    while (1) {
+        /* accept connection */
+        if ( (conn_fd = accept(list_fd, NULL, NULL)) < 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);          /* close listening socket */   
+            SockEcho(conn_fd);       /* handle echo */
+            exit(0);
+        } else {             /* parent */
+            close(conn_fd);          /* close connected socket */
+        }
+    }
+    /* normal exit, never reached */
+    exit(0);
+}