* polished redirect-gateway (ipv4 on ipv6 endpoints) support

3 files changed, 8 insertions, 2 deletions

diff --git a/route.c b/route.c
index f3ed974..cf10334 100644
--- a/route.c
+++ b/route.c
@@ -581,7 +581,7 @@ redirect_default_route_to_vpn (struct route_list *rl, const struct tuntap *tt, u
 	  if (!local)
 	    {
 	      /* route remote host to original default gateway */
-	      if (rl->spec.remote_host != 0xffffffff) {
+	      if (rl->spec.remote_host != IPV4_INVALID_ADDR) {
 		add_route3 (rl->spec.remote_host,
 			    ~0,
 			    rl->spec.net_gateway,
diff --git a/socket.c b/socket.c
index 2d46d3f..72da792 100644
--- a/socket.c
+++ b/socket.c
@@ -2147,7 +2147,7 @@ link_socket_current_remote (const struct link_socket_info *info)
  */
 #ifdef USE_PF_INET6
   if (lsa->actual.dest.addr.sa.sa_family != AF_INET)
-    return 0xffffffff;
+    return IPV4_INVALID_ADDR;
 #else
   ASSERT (lsa->actual.dest.addr.sa.sa_family == AF_INET);
 #endif
diff --git a/socket.h b/socket.h
index f864ab1..5f1e800 100644
--- a/socket.h
+++ b/socket.h
@@ -383,6 +383,12 @@ void setenv_link_socket_actual (struct env_set *es,
 
 void bad_address_length (int actual, int expected);
 
+#ifdef USE_PF_INET6
+/* IPV4_INVALID_ADDR: returned by link_socket_current_remote()
+ * to ease redirect-gateway logic for ipv4 tunnels on ipv6 endpoints
+ */
+#define IPV4_INVALID_ADDR 0xffffffff
+#endif
 in_addr_t link_socket_current_remote (const struct link_socket_info *info);
 
 void link_socket_connection_initiated (const struct buffer *buf,