IPv4 and IPv6 in global options

SRC/echoping.c

@@ -462,6 +462,14 @@ main (argc, argv)
 	}
       global_options.udp = udp;
       global_options.verbose = verbose;
+      if (family == AF_INET)
+	global_options.only_ipv4 = 1;
+      else
+	global_options.only_ipv4 = 0;
+      if (family == AF_INET6)
+	global_options.only_ipv6 = 1;
+      else
+	global_options.only_ipv6 = 0;
       plugin_port_name =
 	plugin_init (remaining, (const char **) leftover, global_options);
       if (plugin_port_name != NULL)

SRC/echoping.h

@@ -122,6 +122,8 @@ unsigned short timeout_flag;
 struct echoping_struct
 {
   unsigned short udp; /* Use the UDP protocol (TCP is the default) */
+  unsigned short only_ipv4;
+  unsigned short only_ipv6;
   unsigned short verbose;
 };
 typedef struct echoping_struct echoping_options;