FIB path preference

[vpp.git] / src / vnet / fib / fib_types.h

diff --git a/src/vnet/fib/fib_types.h b/src/vnet/fib/fib_types.h
index 0a15fef..a7a23d7 100644 (file)
--- a/src/vnet/fib/fib_types.h
+++ b/src/vnet/fib/fib_types.h
@@ -95,28 +95,43 @@ typedef enum fib_forward_chain_type_t_ {
      * option is converted into one of the other three internally.
      */
     FIB_FORW_CHAIN_TYPE_MPLS_EOS,
+    /**
+     * Contribute an object that is to be used to forward IP4 packets
+     */
+    FIB_FORW_CHAIN_TYPE_MCAST_IP4,
+    /**
+     * Contribute an object that is to be used to forward IP6 packets
+     */
+    FIB_FORW_CHAIN_TYPE_MCAST_IP6,
     /**
      * Contribute an object that is to be used to forward Ethernet packets.
+     */
+    FIB_FORW_CHAIN_TYPE_ETHERNET,
+    /**
+     * Contribute an object that is to be used to forward NSH packets.
      * This is last in the list since it is not valid for many FIB objects,
      * and thus their array of per-chain-type DPOs can be sized smaller.
      */
-    FIB_FORW_CHAIN_TYPE_ETHERNET,
+    FIB_FORW_CHAIN_TYPE_NSH,
 }  __attribute__ ((packed)) fib_forward_chain_type_t;
 
 #define FIB_FORW_CHAINS {                                      \
     [FIB_FORW_CHAIN_TYPE_ETHERNET]      = "ethernet",          \
     [FIB_FORW_CHAIN_TYPE_UNICAST_IP4]   = "unicast-ip4",       \
     [FIB_FORW_CHAIN_TYPE_UNICAST_IP6]   = "unicast-ip6",       \
+    [FIB_FORW_CHAIN_TYPE_MCAST_IP4]     = "multicast-ip4",     \
+    [FIB_FORW_CHAIN_TYPE_MCAST_IP6]     = "multicast-ip6",     \
     [FIB_FORW_CHAIN_TYPE_MPLS_NON_EOS]  = "mpls-neos",         \
     [FIB_FORW_CHAIN_TYPE_MPLS_EOS]      = "mpls-eos",          \
+    [FIB_FORW_CHAIN_TYPE_NSH]           = "nsh",                \
 }
 
-#define FIB_FORW_CHAIN_NUM (FIB_FORW_CHAIN_TYPE_MPLS_ETHERNET+1)
+#define FIB_FORW_CHAIN_NUM (FIB_FORW_CHAIN_TYPE_NSH+1)
 #define FIB_FORW_CHAIN_MPLS_NUM (FIB_FORW_CHAIN_TYPE_MPLS_EOS+1)
 
 #define FOR_EACH_FIB_FORW_CHAIN(_item)                   \
     for (_item = FIB_FORW_CHAIN_TYPE_UNICAST_IP4;        \
-        _item <= FIB_FORW_CHAIN_TYPE_ETHERNET;           \
+        _item <= FIB_FORW_CHAIN_TYPE_NSH;                \
         _item++)
 
 #define FOR_EACH_FIB_FORW_MPLS_CHAIN(_item)              \
@@ -263,8 +278,44 @@ typedef enum fib_route_path_flags_t_
      * Recursion constraint of via an attahced prefix
      */
     FIB_ROUTE_PATH_RESOLVE_VIA_ATTACHED = (1 << 1),
+    /**
+     * A for-us/local path
+     */
+    FIB_ROUTE_PATH_LOCAL = (1 << 2),
+    /**
+     * Attached path
+     */
+    FIB_ROUTE_PATH_ATTACHED = (1 << 3),
+    /**
+     * A Drop path - resolve the path on the drop DPO
+     */
+    FIB_ROUTE_PATH_DROP = (1 << 4),
+    /**
+     * Don't resolve the path, use the DPO the client provides
+     */
+    FIB_ROUTE_PATH_EXCLUSIVE = (1 << 5),
+    /**
+     * A path that result in received traffic being recieved/recirculated
+     * so that it appears to have arrived on the new interface
+     */
+    FIB_ROUTE_PATH_INTF_RX = (1 << 6),
+    /**
+     * A local path with a RPF-ID => multicast traffic
+     */
+    FIB_ROUTE_PATH_RPF_ID = (1 << 7),
 } fib_route_path_flags_t;
 
+/**
+ * An RPF-ID is numerical value that is used RPF validate. An entry
+ * has-a RPF-ID, when a packet egress from (e.g. an LSP) it gains an
+ * RPF-ID, these two are compared for the RPF check.
+ * This replaces the interfce based chack (since the LSP has no associated
+ * interface.
+ */
+typedef u32 fib_rpf_id_t;
+
+#define MFIB_RPF_ID_NONE (0)
+
 /**
  * @brief 
  * A representation of a path as described by a route producer.
@@ -298,17 +349,29 @@ typedef struct fib_route_path_t_ {
         */
        ip46_address_t frp_addr;
 
-       /**
-        * The MPLS local Label to reursively resolve through.
-        * This is valid when the path type is MPLS.
-        */
-       mpls_label_t frp_local_label;
+        struct {
+            /**
+             * The MPLS local Label to reursively resolve through.
+             * This is valid when the path type is MPLS.
+             */
+            mpls_label_t frp_local_label;
+            /**
+             * EOS bit for the resolving label
+             */
+            mpls_eos_bit_t frp_eos;
+        };
+    };
+    union {
+        /**
+         * The interface.
+         * Will be invalid for recursive paths.
+         */
+        u32 frp_sw_if_index;
+        /**
+         * The RPF-ID
+         */
+        fib_rpf_id_t frp_rpf_id;
     };
-    /**
-     * The interface.
-     * Will be invalid for recursive paths.
-     */
-    u32 frp_sw_if_index;
     /**
      * The FIB index to lookup the nexthop
      * Only valid for recursive paths.
@@ -317,7 +380,13 @@ typedef struct fib_route_path_t_ {
     /**
      * [un]equal cost path weight
      */
-    u32 frp_weight;
+    u16 frp_weight;
+    /**
+     * A path preference. 0 is the best.
+     * Only paths of the best preference, that are 'up', are considered
+     * for forwarding.
+     */
+    u16 frp_preference;
     /**
      * flags on the path
      */
@@ -337,4 +406,21 @@ typedef struct fib_route_path_encode_t_ {
     dpo_id_t dpo;
 } fib_route_path_encode_t;
 
+/**
+ * return code to control pat-hlist walk
+ */
+typedef enum fib_path_list_walk_rc_t_
+{
+    FIB_PATH_LIST_WALK_STOP,
+    FIB_PATH_LIST_WALK_CONTINUE,
+} fib_path_list_walk_rc_t;
+
+/**
+ * A list of path-extensions
+ */
+typedef struct fib_path_ext_list_t_
+{
+    struct fib_path_ext_t_ *fpel_exts;
+} fib_path_ext_list_t;
+
 #endif