ipsec: bind an SA to a worker

[vpp.git] / src / vnet / ipsec / ah_encrypt.c

diff --git a/src/vnet/ipsec/ah_encrypt.c b/src/vnet/ipsec/ah_encrypt.c
index 1be4b3a..80b3fcc 100644 (file)
--- a/src/vnet/ipsec/ah_encrypt.c
+++ b/src/vnet/ipsec/ah_encrypt.c
@@ -24,9 +24,8 @@
 #include <vnet/ipsec/ah.h>
 
 #define foreach_ah_encrypt_next \
-  _ (DROP, "error-drop")            \
-  _ (IP4_LOOKUP, "ip4-lookup")      \
-  _ (IP6_LOOKUP, "ip6-lookup")      \
+  _ (DROP, "error-drop")                           \
+  _ (HANDOFF, "handoff")                           \
   _ (INTERFACE_OUTPUT, "interface-output")
 
 
@@ -75,8 +74,8 @@ format_ah_encrypt_trace (u8 * s, va_list * args)
   CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
   ah_encrypt_trace_t *t = va_arg (*args, ah_encrypt_trace_t *);
 
-  s = format (s, "ah: sa-index %d spi %u seq %u:%u integrity %U",
-             t->sa_index, t->spi, t->seq_hi, t->seq_lo,
+  s = format (s, "ah: sa-index %d spi %u (0x%08x) seq %u:%u integrity %U",
+             t->sa_index, t->spi, t->spi, t->seq_hi, t->seq_lo,
              format_ipsec_integ_alg, t->integ_alg);
   return s;
 }
@@ -183,6 +182,21 @@ ah_encrypt_inline (vlib_main_t * vm,
       pd->sa_index = current_sa_index;
       next[0] = AH_ENCRYPT_NEXT_DROP;
 
+      if (PREDICT_FALSE (~0 == sa0->encrypt_thread_index))
+       {
+         /* this is the first packet to use this SA, claim the SA
+          * for this thread. this could happen simultaneously on
+          * another thread */
+         clib_atomic_cmp_and_swap (&sa0->encrypt_thread_index, ~0,
+                                   ipsec_sa_assign_thread (thread_index));
+       }
+
+      if (PREDICT_TRUE (thread_index != sa0->encrypt_thread_index))
+       {
+         next[0] = AH_ENCRYPT_NEXT_HANDOFF;
+         goto next;
+       }
+
       if (PREDICT_FALSE (esp_seq_advance (sa0)))
        {
          b[0]->error = node->errors[AH_ENCRYPT_ERROR_SEQ_CYCLED];
@@ -420,9 +434,9 @@ VLIB_REGISTER_NODE (ah4_encrypt_node) = {
 
   .n_next_nodes = AH_ENCRYPT_N_NEXT,
   .next_nodes = {
-#define _(s,n) [AH_ENCRYPT_NEXT_##s] = n,
-    foreach_ah_encrypt_next
-#undef _
+    [AH_ENCRYPT_NEXT_DROP] = "ip4-drop",
+    [AH_ENCRYPT_NEXT_HANDOFF] = "ah4-encrypt-handoff",
+    [AH_ENCRYPT_NEXT_INTERFACE_OUTPUT] = "interface-output",
   },
 };
 /* *INDENT-ON* */
@@ -446,9 +460,9 @@ VLIB_REGISTER_NODE (ah6_encrypt_node) = {
 
   .n_next_nodes = AH_ENCRYPT_N_NEXT,
   .next_nodes = {
-#define _(s,n) [AH_ENCRYPT_NEXT_##s] = n,
-    foreach_ah_encrypt_next
-#undef _
+    [AH_ENCRYPT_NEXT_DROP] = "ip6-drop",
+    [AH_ENCRYPT_NEXT_HANDOFF] = "ah6-encrypt-handoff",
+    [AH_ENCRYPT_NEXT_INTERFACE_OUTPUT] = "interface-output",
   },
 };
 /* *INDENT-ON* */