Peter Sylvester pointed out a flaw in the AllowServerConnect() in the FTP

code when doing pure ipv6 EPRT connections.

lib/ftp.c

@@ -215,8 +215,12 @@ static CURLcode AllowServerConnect(struct connectdata *conn)
     /* we have received data here */
     {
       curl_socket_t s = CURL_SOCKET_BAD;
-      socklen_t size = (socklen_t) sizeof(struct sockaddr_in);
+#ifdef ENABLE_IPV6
+      struct Curl_sockaddr_storage add;
+#else
       struct sockaddr_in add;
+#endif
+      socklen_t size = (socklen_t) sizeof(add);
 
       if(0 == getsockname(sock, (struct sockaddr *) &add, &size))
         s=accept(sock, (struct sockaddr *) &add, &size);