X-Git-Url: https://gapil.gnulinux.it/gitweb/?a=blobdiff_plain;f=listati%2FTCP_echo1.c;fp=listati%2FTCP_echo1.c;h=d09d0470161612584dec2eb4262e713995ac90b9;hb=7444bbe1f4d1e9858693bfcb41921fa601450a89;hp=0000000000000000000000000000000000000000;hpb=626fee850ef998ab730a6da711494d6a5ace1be5;p=gapil.git

diff --git a/listati/TCP_echo1.c b/listati/TCP_echo1.c
new file mode 100644
index 0000000..d09d047
--- /dev/null
+++ b/listati/TCP_echo1.c
@@ -0,0 +1,32 @@
+int main(int argc, char *argv[])
+{
+/* 
+ * Variables definition  
+ */
+    int sock_fd, i;
+    struct sockaddr_in serv_add;
+    ...
+    /* create socket */
+    if ( (sock_fd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+        perror("Socket creation error");
+        return 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(7);                    /* echo port is 7 */
+    /* build address using inet_pton */
+    if ( (inet_pton(AF_INET, argv[optind], &serv_add.sin_addr)) <= 0) {
+        perror("Address creation error");
+        return 1;
+    }
+    /* extablish connection */
+    if (connect(sock_fd, (struct sockaddr *)&serv_add, sizeof(serv_add)) < 0) {
+        perror("Connection error");
+        return 1;
+    }
+    /* read daytime from server */
+    ClientEcho(stdin, sock_fd);
+    /* normal exit */
+    return 0;
+}