ipsec: Allow SAs with NULL auth &crypto on IPSec interface

[vpp.git] / src / vnet / ipsec / ipsec_tun.h

diff --git a/src/vnet/ipsec/ipsec_tun.h b/src/vnet/ipsec/ipsec_tun.h
index 863afdb..0d911a2 100644 (file)
--- a/src/vnet/ipsec/ipsec_tun.h
+++ b/src/vnet/ipsec/ipsec_tun.h
@@ -17,48 +17,96 @@
 
 #include <vnet/ipsec/ipsec.h>
 
-/* *INDENT-OFF* */
-typedef CLIB_PACKED(struct {
+/**
+ * result of a lookup in the protection bihash
+ */
+typedef struct ipsec_tun_lkup_result_t_
+{
+  union
+  {
+    struct
+    {
+      u32 tun_index;
+      u32 sa_index;
+    };
+    u64 as_u64;
+  };
+} ipsec_tun_lkup_result_t;
+
+typedef struct ipsec4_tunnel_kv_t
+{
   /*
    * Key fields: remote ip and spi on incoming packet
    * all fields in NET byte order
    */
-  union {
-    struct {
-      ip4_address_t remote_ip;
-      u32 spi;
-    };
-    u64 as_u64;
-  };
-}) ipsec4_tunnel_key_t;
-/* *INDENT-ON* */
+  u64 key;
+  ipsec_tun_lkup_result_t value;
+} __clib_packed ipsec4_tunnel_kv_t;
 
-/* *INDENT-OFF* */
-typedef CLIB_PACKED(struct {
+STATIC_ASSERT_SIZEOF (ipsec4_tunnel_kv_t, sizeof (clib_bihash_kv_8_8_t));
+STATIC_ASSERT_OFFSET_OF (ipsec4_tunnel_kv_t, value,
+                        STRUCT_OFFSET_OF (clib_bihash_kv_8_8_t, value));
+
+static inline void
+ipsec4_tunnel_mk_key (ipsec4_tunnel_kv_t * k,
+                     const ip4_address_t * ip, u32 spi)
+{
+  k->key = (((u64) ip->as_u32) << 32 | spi);
+}
+
+static inline void
+ipsec4_tunnel_extract_key (const ipsec4_tunnel_kv_t * k,
+                          ip4_address_t * ip, u32 * spi)
+{
+  *spi = (u32) k->key;
+  (*ip).as_u32 = k->key >> 32;
+}
+
+typedef struct ipsec6_tunnel_kv_t_
+{
   /*
    * Key fields: remote ip and spi on incoming packet
    * all fields in NET byte order
    */
-  ip6_address_t remote_ip;
-  u32 spi;
-}) ipsec6_tunnel_key_t;
-/* *INDENT-ON* */
+  struct
+  {
+    ip6_address_t remote_ip;
+    u32 spi;
+    u32 __pad;
+  } key;
+  ipsec_tun_lkup_result_t value;
+} __clib_packed ipsec6_tunnel_kv_t;
+
+STATIC_ASSERT_SIZEOF (ipsec6_tunnel_kv_t, sizeof (clib_bihash_kv_24_8_t));
+STATIC_ASSERT_OFFSET_OF (ipsec6_tunnel_kv_t, value,
+                        STRUCT_OFFSET_OF (clib_bihash_kv_24_8_t, value));
+
+extern u8 *format_ipsec4_tunnel_kv (u8 * s, va_list * args);
+extern u8 *format_ipsec6_tunnel_kv (u8 * s, va_list * args);
 
-extern u8 *format_ipsec4_tunnel_key (u8 * s, va_list * args);
-extern u8 *format_ipsec6_tunnel_key (u8 * s, va_list * args);
+#define foreach_ipsec_protect_flags \
+  _(L2, 1, "l2")                    \
+  _(ENCAPED, 2, "encapped")         \
+  _(ITF, 4, "itf")                  \
 
 typedef enum ipsec_protect_flags_t_
 {
-  IPSEC_PROTECT_L2 = (1 << 0),
-  IPSEC_PROTECT_ENCAPED = (1 << 1),
+  IPSEC_PROTECT_NONE = 0,
+#define _(a,b,c) IPSEC_PROTECT_##a = b,
+  foreach_ipsec_protect_flags
+#undef _
 } __clib_packed ipsec_protect_flags_t;
 
+extern u8 *format_ipsec_tun_protect_flags (u8 * s, va_list * args);
+
 typedef struct ipsec_ep_t_
 {
   ip46_address_t src;
   ip46_address_t dst;
 } ipsec_ep_t;
 
+#define ITP_MAX_N_SA_IN 4
+
 typedef struct ipsec_tun_protect_t_
 {
   CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
@@ -67,13 +115,14 @@ typedef struct ipsec_tun_protect_t_
   /* not using a vector since we want the memory inline
    * with this struct */
   u32 itp_n_sa_in;
-  index_t itp_in_sas[4];
+  index_t itp_in_sas[ITP_MAX_N_SA_IN];
 
   u32 itp_sw_if_index;
 
   ipsec_ep_t itp_crypto;
 
   ipsec_protect_flags_t itp_flags;
+  adj_index_t itp_ai;
 
   ipsec_ep_t itp_tun;
 
@@ -124,6 +173,9 @@ extern u8 *format_ipsec_tun_protect_index (u8 * s, va_list * args);
 extern void ipsec_tun_register_nodes (ip_address_family_t af);
 extern void ipsec_tun_unregister_nodes (ip_address_family_t af);
 
+extern void ipsec_tun_table_init (ip_address_family_t af,
+                                 uword table_size, u32 n_buckets);
+
 // FIXME
 extern vlib_node_registration_t ipsec4_tun_input_node;
 extern vlib_node_registration_t ipsec6_tun_input_node;
@@ -133,19 +185,6 @@ extern vlib_node_registration_t ipsec6_tun_input_node;
  */
 extern ipsec_tun_protect_t *ipsec_tun_protect_pool;
 
-typedef struct ipsec_tun_lkup_result_t_
-{
-  union
-  {
-    struct
-    {
-      u32 tun_index;
-      u32 sa_index;
-    };
-    u64 as_u64;
-  };
-} ipsec_tun_lkup_result_t;
-
 always_inline ipsec_tun_protect_t *
 ipsec_tun_protect_get (u32 index)
 {