Client per il servizio echo su UDP e relative chiacchiere

[gapil.git] / listati / UDP_echo.c

diff --git a/listati/UDP_echo.c b/listati/UDP_echo.c
new file mode 100644 (file)
index 0000000..943ec75
--- /dev/null
+++ b/listati/UDP_echo.c
@@ -0,0 +1,31 @@
+void ClientEcho(FILE * filein, int socket, struct sockaddr_in *serv_add);
+void SigTERM_hand(int sig);
+
+/* Program begin */
+int main(int argc, char *argv[])
+{
+/* 
+ * Variables definition  
+ */
+    int sock, i;
+    struct sockaddr_in serv_add;
+    ...
+    /* create socket */
+    if ( (sock = socket(AF_INET, SOCK_DGRAM, 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;
+    }
+    /* do read/write operations */
+    ClientEcho(stdin, sock, &serv_add);
+    /* normal exit */
+    return 0;
+}