Added new 'autolocal' redirect-gateway flag. When enabled, the OpenVPN

client will examine the routing table and determine whether (a) the
OpenVPN server is reachable via a locally connected interface, or (b)
traffic to the server must be forwarded through the default router.
Only add a special bypass route for the OpenVPN server if (b) is true.
If (a) is true, behave as if the 'local' flag is specified, and do not
add a bypass route.

The new 'autolocal' flag depends on the non-portable test_local_addr()
function in route.c, which is currently only implemented for Windows.
The 'autolocal' flag will act as a no-op on platforms that have not
yet defined a test_local_addr() function.

Increased TLS_CHANNEL_BUF_SIZE to 2048 from 1024 (this will allow for
more option content to be pushed from server to client).

Raised D_MULTI_DROPPED debug level to 4 from 3.

Version 2.1_rc16b.


git-svn-id: http://svn.openvpn.net/projects/openvpn/branches/BETA21/openvpn@4446 e7ae566f-a301-0410-adde-c780ea21d3b5

1 files changed, 13 insertions, 0 deletions

diff --git a/route.h b/route.h
index 27ac623..a2654a2 100644
--- a/route.h
+++ b/route.h
@@ -83,6 +83,7 @@ struct route_option {
 #define RG_BYPASS_DHCP    (1<<3)
 #define RG_BYPASS_DNS     (1<<4)
 #define RG_REROUTE_GW     (1<<5)
+#define RG_AUTO_LOCAL     (1<<6)
 
 struct route_option_list {
   int n;
@@ -105,6 +106,7 @@ struct route_list {
   struct route_special_addr spec;
   unsigned int flags;
   bool did_redirect_default_gateway;
+  bool did_local;
   int n;
   struct route routes[MAX_ROUTES];
 };
@@ -159,6 +161,17 @@ bool is_special_addr (const char *addr_str);
 
 bool get_default_gateway (in_addr_t *ip, in_addr_t *netmask);
 
+/*
+ * Test if addr is reachable via a local interface (return ILA_LOCAL),
+ * or if it needs to be routed via the default gateway (return
+ * ILA_NONLOCAL).  If the current platform doesn't implement this
+ * function, return ILA_NOT_IMPLEMENTED.
+ */
+#define TLA_NOT_IMPLEMENTED 0
+#define TLA_NONLOCAL        1
+#define TLA_LOCAL           2
+int test_local_addr (const in_addr_t addr);
+
 #if AUTO_USERID
 bool get_default_gateway_mac_addr (unsigned char *macaddr);
 #endif