ipsec: Reference count the SAs

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

diff --git a/src/vnet/ipsec/ipsec_sa.h b/src/vnet/ipsec/ipsec_sa.h
index 66bdcc7..811f4ca 100644 (file)
--- a/src/vnet/ipsec/ipsec_sa.h
+++ b/src/vnet/ipsec/ipsec_sa.h
@@ -43,6 +43,11 @@ typedef enum
     IPSEC_CRYPTO_N_ALG,
 } ipsec_crypto_alg_t;
 
+#define IPSEC_CRYPTO_ALG_IS_GCM(_alg)                     \
+  (((_alg == IPSEC_CRYPTO_ALG_AES_GCM_128) ||             \
+    (_alg == IPSEC_CRYPTO_ALG_AES_GCM_192) ||             \
+    (_alg == IPSEC_CRYPTO_ALG_AES_GCM_256)))
+
 #define foreach_ipsec_integ_alg                                            \
   _ (0, NONE, "none")                                                      \
   _ (1, MD5_96, "md5-96")           /* RFC2403 */                          \
@@ -66,8 +71,6 @@ typedef enum
   IPSEC_PROTOCOL_ESP = 1
 } ipsec_protocol_t;
 
-#define IPSEC_N_PROTOCOLS (IPSEC_PROTOCOL_ESP+1)
-
 #define IPSEC_KEY_MAX_LEN 128
 typedef struct ipsec_key_t_
 {
@@ -90,8 +93,9 @@ typedef struct ipsec_key_t_
   _ (4, IS_TUNNEL, "tunnel")                              \
   _ (8, IS_TUNNEL_V6, "tunnel-v6")                        \
   _ (16, UDP_ENCAP, "udp-encap")                          \
-  _ (32, IS_GRE, "GRE")                                   \
+  _ (32, IS_PROTECT, "Protect")                           \
   _ (64, IS_INBOUND, "inboud")                            \
+  _ (128, IS_AEAD, "aead")                                \
 
 typedef enum ipsec_sad_flags_t_
 {
@@ -111,19 +115,20 @@ typedef struct
 
   u8 crypto_iv_size;
   u8 crypto_block_size;
-  u8 integ_trunc_size;
+  u8 integ_icv_size;
   u32 spi;
   u32 seq;
   u32 seq_hi;
   u32 last_seq;
   u32 last_seq_hi;
   u64 replay_window;
+  dpo_id_t dpo;
 
-  vnet_crypto_op_type_t crypto_enc_op_type;
-  vnet_crypto_op_type_t crypto_dec_op_type;
-  vnet_crypto_op_type_t integ_op_type;
-
-  dpo_id_t dpo[IPSEC_N_PROTOCOLS];
+  vnet_crypto_key_index_t crypto_key_index;
+  vnet_crypto_key_index_t integ_key_index;
+  vnet_crypto_op_id_t crypto_enc_op_id:16;
+  vnet_crypto_op_id_t crypto_dec_op_id:16;
+  vnet_crypto_op_id_t integ_op_id:16;
 
   /* data accessed by dataplane code should be above this comment */
     CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
@@ -135,7 +140,6 @@ typedef struct
   };
   udp_header_t udp_hdr;
 
-
   fib_node_t node;
   u32 id;
   u32 stat_index;
@@ -143,9 +147,11 @@ typedef struct
 
   ipsec_crypto_alg_t crypto_alg;
   ipsec_key_t crypto_key;
+  vnet_crypto_alg_t crypto_calg;
 
   ipsec_integ_alg_t integ_alg;
   ipsec_key_t integ_key;
+  vnet_crypto_alg_t integ_calg;
 
   ip46_address_t tunnel_src_addr;
   ip46_address_t tunnel_dst_addr;
@@ -154,9 +160,10 @@ typedef struct
   u32 sibling;
 
   u32 tx_fib_index;
-  u32 salt;
 
-  /* runtime */
+  /* Salt used in GCM modes - stored in network byte order */
+  u32 salt;
+  u64 gcm_iv_counter;
 } ipsec_sa_t;
 
 STATIC_ASSERT_OFFSET_OF (ipsec_sa_t, cacheline1, CLIB_CACHE_LINE_BYTES);
@@ -175,6 +182,13 @@ foreach_ipsec_sa_flags
   }
   foreach_ipsec_sa_flags
 #undef _
+#define _(a,v,s)                                                        \
+  always_inline int                                                     \
+  ipsec_sa_unset_##v (ipsec_sa_t *sa) {                                 \
+    return (sa->flags &= ~IPSEC_SA_FLAG_##v);                           \
+  }
+  foreach_ipsec_sa_flags
+#undef _
 /**
  * @brief
  * SA packet & bytes counters
@@ -183,30 +197,28 @@ extern vlib_combined_counter_main_t ipsec_sa_counters;
 
 extern void ipsec_mk_key (ipsec_key_t * key, const u8 * data, u8 len);
 
-extern int ipsec_sa_add (u32 id,
-                        u32 spi,
-                        ipsec_protocol_t proto,
-                        ipsec_crypto_alg_t crypto_alg,
-                        const ipsec_key_t * ck,
-                        ipsec_integ_alg_t integ_alg,
-                        const ipsec_key_t * ik,
-                        ipsec_sa_flags_t flags,
-                        u32 tx_table_id,
-                        const ip46_address_t * tunnel_src_addr,
-                        const ip46_address_t * tunnel_dst_addr,
-                        u32 * sa_index);
-extern u32 ipsec_sa_del (u32 id);
-extern void ipsec_sa_stack (ipsec_sa_t * sa);
+extern int ipsec_sa_add_and_lock (u32 id,
+                                 u32 spi,
+                                 ipsec_protocol_t proto,
+                                 ipsec_crypto_alg_t crypto_alg,
+                                 const ipsec_key_t * ck,
+                                 ipsec_integ_alg_t integ_alg,
+                                 const ipsec_key_t * ik,
+                                 ipsec_sa_flags_t flags,
+                                 u32 tx_table_id,
+                                 u32 salt,
+                                 const ip46_address_t * tunnel_src_addr,
+                                 const ip46_address_t * tunnel_dst_addr,
+                                 u32 * sa_index);
+extern index_t ipsec_sa_find_and_lock (u32 id);
+extern int ipsec_sa_unlock_id (u32 id);
+extern void ipsec_sa_unlock (index_t sai);
+extern void ipsec_sa_clear (index_t sai);
 extern void ipsec_sa_set_crypto_alg (ipsec_sa_t * sa,
                                     ipsec_crypto_alg_t crypto_alg);
 extern void ipsec_sa_set_integ_alg (ipsec_sa_t * sa,
                                    ipsec_integ_alg_t integ_alg);
 
-extern u8 ipsec_is_sa_used (u32 sa_index);
-extern int ipsec_set_sa_key (u32 id,
-                            const ipsec_key_t * ck, const ipsec_key_t * ik);
-extern u32 ipsec_get_sa_index_by_sa_id (u32 sa_id);
-
 typedef walk_rc_t (*ipsec_sa_walk_cb_t) (ipsec_sa_t * sa, void *ctx);
 extern void ipsec_sa_walk (ipsec_sa_walk_cb_t cd, void *ctx);
 
@@ -286,13 +298,13 @@ ipsec_sa_anti_replay_check (ipsec_sa_t * sa, u32 * seqp)
 }
 
 always_inline void
-ipsec_sa_anti_replay_advance (ipsec_sa_t * sa, u32 * seqp)
+ipsec_sa_anti_replay_advance (ipsec_sa_t * sa, u32 seqp)
 {
   u32 pos, seq;
   if (PREDICT_TRUE (sa->flags & IPSEC_SA_FLAG_USE_ANTI_REPLAY) == 0)
     return;
 
-  seq = clib_host_to_net_u32 (*seqp);
+  seq = clib_host_to_net_u32 (seqp);
   if (PREDICT_TRUE (sa->flags & IPSEC_SA_FLAG_USE_ESN))
     {
       int wrap = sa->seq_hi - sa->last_seq_hi;