Make OVS_TUNNEL_ATTR_DST_IPV4 optional to allow configuration of null_ports.

[cascardo/ovs.git] / include / openvswitch / tunnel.h

diff --git a/include/openvswitch/tunnel.h b/include/openvswitch/tunnel.h
index 110e652..479f524 100644 (file)
--- a/include/openvswitch/tunnel.h
+++ b/include/openvswitch/tunnel.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2011 Nicira, Inc.
  *
  * This file is offered under your choice of two licenses: Apache 2.0 or GNU
  * GPL 2.0 or later.  The permission statements for each of these licenses is
@@ -45,14 +45,15 @@
 
 /* OVS_VPORT_ATTR_OPTIONS attributes for tunnels.
  *
- * OVS_TUNNEL_ATTR_FLAGS and OVS_TUNNEL_ATTR_DST_IPV4 are required.  All other
+ * OVS_TUNNEL_ATTR_DST_IPV4 is required for kernel tunnel ports, all other
  * attributes are optional.
+ * For flow-based tunnels, none of the options apply.
  */
 enum {
        OVS_TUNNEL_ATTR_UNSPEC,
        OVS_TUNNEL_ATTR_FLAGS,    /* 32-bit TNL_F_*. */
-       OVS_TUNNEL_ATTR_DST_IPV4, /* IPv4 destination address. */
-       OVS_TUNNEL_ATTR_SRC_IPV4, /* IPv4 source address. */
+       OVS_TUNNEL_ATTR_DST_IPV4, /* Remote IPv4 address. */
+       OVS_TUNNEL_ATTR_SRC_IPV4, /* Local IPv4 address. */
        OVS_TUNNEL_ATTR_OUT_KEY,  /* __be64 key to use on output. */
        OVS_TUNNEL_ATTR_IN_KEY,   /* __be64 key to match on input. */
        OVS_TUNNEL_ATTR_TOS,      /* 8-bit TOS value. */
@@ -63,12 +64,13 @@ enum {
 #define OVS_TUNNEL_ATTR_MAX (__OVS_TUNNEL_ATTR_MAX - 1)
 
 #define TNL_F_CSUM             (1 << 0) /* Checksum packets. */
-#define TNL_F_TOS_INHERIT      (1 << 1) /* Inherit the ToS from the inner packet. */
-#define TNL_F_TTL_INHERIT      (1 << 2) /* Inherit the TTL from the inner packet. */
-#define TNL_F_DF_INHERIT       (1 << 3) /* Inherit the DF bit from the inner packet. */
-#define TNL_F_DF_DEFAULT       (1 << 4) /* Set the DF bit if inherit off or not IP. */
+#define TNL_F_TOS_INHERIT      (1 << 1) /* Inherit ToS from inner packet. */
+#define TNL_F_TTL_INHERIT      (1 << 2) /* Inherit TTL from inner packet. */
+#define TNL_F_DF_INHERIT       (1 << 3) /* Inherit DF bit from inner packet. */
+#define TNL_F_DF_DEFAULT       (1 << 4) /* Set DF bit if inherit off or
+                                         * not IP. */
+/* Bit 6 is reserved since it was previously used for Tunnel header caching. */
 #define TNL_F_PMTUD            (1 << 5) /* Enable path MTU discovery. */
-#define TNL_F_HDR_CACHE                (1 << 6) /* Enable tunnel header caching. */
 #define TNL_F_IPSEC            (1 << 7) /* Traffic is IPsec encrypted. */
 
 #endif /* openvswitch/tunnel.h */