rfe2636157 - Permit a delayed UDP connection to overcome unpredictable

             NAT ports.

TODO

@@ -0,0 +1,20 @@
+
+netlib.c:196 - set a timeout for waiting for the remote UDP start
+
+NATHack
+
+ - unify the config as one (local) setting, and use a connection
+   cookie passed to coordinate which side goes passive.  The server
+   wins in all ties.  auth.c:195
+
+ - lose the global variable and move it into the vtun struct.  For
+   now.  main.c:54, vtun.h:111
+
+
+---
+
+Comments, suggestion, wishes and if possible patches are always welcome.
+Send them to vtun-users@lists.sourceforge.net .
+
+Bishop Clark <bishop@platypus.bc.ca>
+

cfg_kwords.h

@@ -17,7 +17,7 @@
  */
 
 /*
- * $Id: cfg_kwords.h,v 1.6.2.2 2008/01/07 22:35:26 mtbishop Exp $
+ * $Id: cfg_kwords.h,v 1.6.2.3 2009/03/29 10:08:41 mtbishop Exp $
  */ 
 
 extern int lineno;
@@ -49,6 +49,8 @@ struct kword cfg_keyword[] = {
    { "encrypt",  K_ENCRYPT }, 
    { "type",	 K_TYPE }, 
    { "proto",	 K_PROT }, 
+   { "nat_hack", K_NAT_HACK },
+   { "delay_udp",K_NAT_HACK },
    { "device",	 K_DEVICE }, 
    { "ppp",	 K_PPP },
    { "ifconfig", K_IFCFG },
@@ -75,6 +77,8 @@ struct kword cfg_param[] = {
    { "tun",	 VTUN_TUN }, 
    { "tcp",      VTUN_TCP }, 
    { "udp",      VTUN_UDP }, 
+   { "client",   VTUN_NAT_HACK_CLIENT },
+   { "server",   VTUN_NAT_HACK_SERVER },   
    { "lzo",      VTUN_LZO }, 
    { "zlib",     VTUN_ZLIB }, 
    { "wait",	 1 },

config.h.in

@@ -0,0 +1,76 @@
+/* config.h.in.  Generated automatically from configure.in by autoheader.  */
+
+/* Define to empty if the keyword does not work.  */
+#undef const
+
+/* Define as __inline if that's what the C compiler calls it.  */
+#undef inline
+
+/* Define if you have the ANSI C header files.  */
+#undef STDC_HEADERS
+
+/* Define if you have the gettimeofday function.  */
+#undef HAVE_GETTIMEOFDAY
+
+/* Define if you have the <arpa/inet.h> header file.  */
+#undef HAVE_ARPA_INET_H
+
+/* Define if you have the <fcntl.h> header file.  */
+#undef HAVE_FCNTL_H
+
+/* Define if you have the <netinet/in.h> header file.  */
+#undef HAVE_NETINET_IN_H
+
+/* Define if you have the <netinet/ip.h> header file.  */
+#undef HAVE_NETINET_IP_H
+
+/* Define if you have the <netinet/tcp.h> header file.  */
+#undef HAVE_NETINET_TCP_H
+
+/* Define if you have the <netinet/in_systm.h> header file.  */
+#undef HAVE_NETINET_IN_SYSTM_H
+
+/* Define if you have the <netdb.h> header file.  */
+#undef HAVE_NETDB_H
+
+/* Define if you have the <sched.h> header file.  */
+#undef HAVE_SCHED_H
+
+/* Define if you have the <sys/resource.h> header file.  */
+#undef HAVE_SYS_RESOURCE_H
+
+/* Define if you have the <sys/time.h> header file.  */
+#undef HAVE_SYS_TIME_H
+
+/* Define if you have the <sys/sockio.h> header file.  */
+#undef HAVE_SYS_SOCKIO_H
+
+/* Define if you have the <linux/if_tun.h> header file.  */
+#undef HAVE_LINUX_IF_TUN_H
+
+/* Define if you have setproctitle. */
+#undef HAVE_SETPROC_TITLE
+
+#undef HAVE_LIBUTIL_H
+
+/* Define if you have ZLIB */
+#undef HAVE_ZLIB
+
+/* Define if you have LZO */
+#undef HAVE_LZO
+
+/* Define if you have OpenSSL */
+#undef HAVE_SSL
+
+#undef HAVE_SSL_BLOWFISH
+
+#undef HAVE_SSL_AES
+
+#undef HAVE_SSL_EVP
+
+#undef HAVE_SHAPER
+
+#undef ENABLE_NAT_HACK
+
+/* Release version and date */
+#undef VTUN_VER