ARP/NDP does not send solicitation when no source address is available

[vpp.git] / vnet / vnet / ip / ip4.h

diff --git a/vnet/vnet/ip/ip4.h b/vnet/vnet/ip/ip4.h
index 5c530b7..f005522 100644 (file)
--- a/vnet/vnet/ip/ip4.h
+++ b/vnet/vnet/ip/ip4.h
@@ -43,6 +43,7 @@
 #include <vnet/ip/ip4_mtrie.h>
 #include <vnet/ip/ip4_packet.h>
 #include <vnet/ip/lookup.h>
+#include <vnet/ip/ip_feature_registration.h>
 
 typedef struct ip4_fib_t {
   /* Hash table for each prefix length mapping. */
@@ -101,30 +102,6 @@ typedef struct {
   uword function_opaque;
 } ip4_add_del_interface_address_callback_t;
 
-typedef enum {
-  /* First check access list to either permit or deny this
-     packet based on classification. */
-  IP4_RX_FEATURE_CHECK_ACCESS,
-
-  /* RPF check: verify that source address is reachable via
-     RX interface or via any interface. */
-  IP4_RX_FEATURE_SOURCE_CHECK_REACHABLE_VIA_RX,
-  IP4_RX_FEATURE_SOURCE_CHECK_REACHABLE_VIA_ANY,
-
-  /* IPSec */
-  IP4_RX_FEATURE_IPSEC,
-
-  /* vPath forwarding: won't return to call next feature
-     so any feature needed before vPath forwarding must be prior
-     to this entry */
-  IP4_RX_FEATURE_VPATH,
-
-  /* Must be last: perform forwarding lookup. */
-  IP4_RX_FEATURE_LOOKUP,
-
-  IP4_N_RX_FEATURE,
-} ip4_rx_feature_type_t;
-
 typedef struct ip4_main_t {
   ip_lookup_main_t lookup_main;
 
@@ -152,6 +129,22 @@ typedef struct ip4_main_t {
   /* Template used to generate IP4 ARP packets. */
   vlib_packet_template_t ip4_arp_request_packet_template;
 
+  /* feature path configuration lists */
+  vnet_ip_feature_registration_t * next_uc_feature;
+  vnet_ip_feature_registration_t * next_mc_feature;
+
+  /* Built-in unicast feature path indices, see ip_feature_init_cast(...)  */
+  u32 ip4_unicast_rx_feature_check_access;
+  u32 ip4_unicast_rx_feature_source_reachable_via_rx;
+  u32 ip4_unicast_rx_feature_source_reachable_via_any;
+  u32 ip4_unicast_rx_feature_ipsec;
+  u32 ip4_unicast_rx_feature_vpath;
+  u32 ip4_unicast_rx_feature_lookup;
+
+  /* Built-in multicast feature path indices */
+  u32 ip4_multicast_rx_feature_vpath;
+  u32 ip4_multicast_rx_feature_lookup;
+  
   /* Seed for Jenkins hash used to compute ip4 flow hash. */
   u32 flow_hash_seed;
 
@@ -169,10 +162,36 @@ typedef struct ip4_main_t {
 /* Global ip4 main structure. */
 extern ip4_main_t ip4_main;
 
+#define VNET_IP4_UNICAST_FEATURE_INIT(x,...)                    \
+  __VA_ARGS__ vnet_ip_feature_registration_t uc_##x;            \
+static void __vnet_add_feature_registration_uc_##x (void)       \
+  __attribute__((__constructor__)) ;                            \
+static void __vnet_add_feature_registration_uc_##x (void)       \
+{                                                               \
+  ip4_main_t * im = &ip4_main;                                  \
+  uc_##x.next = im->next_uc_feature;                            \
+  im->next_uc_feature = &uc_##x;                                \
+}                                                               \
+__VA_ARGS__ vnet_ip_feature_registration_t uc_##x 
+
+#define VNET_IP4_MULTICAST_FEATURE_INIT(x,...)                  \
+  __VA_ARGS__ vnet_ip_feature_registration_t mc_##x;            \
+static void __vnet_add_feature_registration_mc_##x (void)       \
+  __attribute__((__constructor__)) ;                            \
+static void __vnet_add_feature_registration_mc_##x (void)       \
+{                                                               \
+  ip4_main_t * im = &ip4_main;                                  \
+  mc_##x.next = im->next_mc_feature;                            \
+  im->next_mc_feature = &mc_##x;                                \
+}                                                               \
+__VA_ARGS__ vnet_ip_feature_registration_t mc_##x 
+
+
 /* Global ip4 input node.  Errors get attached to ip4 input node. */
 extern vlib_node_registration_t ip4_input_node;
 extern vlib_node_registration_t ip4_lookup_node;
 extern vlib_node_registration_t ip4_rewrite_node;
+extern vlib_node_registration_t ip4_rewrite_local_node;
 extern vlib_node_registration_t ip4_arp_node;
 
 u32 ip4_fib_lookup_with_table (ip4_main_t * im, u32 fib_index, ip4_address_t * dst,
@@ -218,13 +237,16 @@ ip4_unaligned_destination_matches_route (ip4_main_t * im,
                                         uword dest_length)
 { return 0 == ((clib_mem_unaligned (&key->data_u32, u32) ^ dest->data_u32) & im->fib_masks[dest_length]); }
 
-always_inline void
+always_inline int
 ip4_src_address_for_packet (ip4_main_t * im, vlib_buffer_t * p, ip4_address_t * src, u32 sw_if_index)
 {
   ip_lookup_main_t * lm = &im->lookup_main;
   ip_interface_address_t * ia = ip_interface_address_for_packet (lm, p, sw_if_index);
+  if (ia == NULL)
+    return -1;
   ip4_address_t * a = ip_interface_address_get_address (lm, ia);
   *src = a[0];
+  return 0;
 }
 
 /* Find interface address which matches destination. */
@@ -293,6 +315,28 @@ typedef struct {
   u32 n_add_adj;
 } ip4_add_del_route_args_t;
 
+/**
+ * \brief Get or create an IPv4 fib.
+ *
+ * Get or create an IPv4 fib with the provided fib ID or index.
+ * The fib ID is a possibly-sparse user-defined value while
+ * the fib index defines the position of the fib in the fib vector.
+ *
+ * \param im
+ *      ip4_main pointer.
+ * \param table_index_or_id
+ *      The table index if \c IP4_ROUTE_FLAG_FIB_INDEX bit is set in \p flags.
+ *      Otherwise, when set to \c ~0, an arbitrary and unused fib ID is picked
+ *      and can be retrieved with \c ret->table_id.
+ *      Otherwise, the fib ID to be used to retrieve or create the desired fib.
+ * \param flags
+ *      Indicates whether \p table_index_or_id is the fib index or ID.
+ *      When the bit \c IP4_ROUTE_FLAG_FIB_INDEX is set, \p table_index_or_id
+ *      is considered as the fib index, and the fib ID otherwise.
+ * \returns A pointer to the retrieved or created fib.
+ *
+ * \remark When getting a fib with the fib index, the fib MUST already exist.
+ */
 ip4_fib_t *
 find_ip4_fib_by_table_index_or_id (ip4_main_t * im, 
                                    u32 table_index_or_id, u32 flags);