ipsec: fix build with gcc 6

[dpdk.git] / lib / librte_ipsec / crypto.h

diff --git a/lib/librte_ipsec/crypto.h b/lib/librte_ipsec/crypto.h
index 61f5c14..b5f2648 100644 (file)
--- a/lib/librte_ipsec/crypto.h
+++ b/lib/librte_ipsec/crypto.h
@@ -76,6 +76,31 @@ gen_iv(uint64_t iv[IPSEC_MAX_IV_QWORD], rte_be64_t sqn)
        iv[1] = 0;
 }
 
+/*
+ * Helper routine to copy IV
+ * Righ now we support only algorithms with IV length equals 0/8/16 bytes.
+ */
+static inline void
+copy_iv(uint64_t dst[IPSEC_MAX_IV_QWORD],
+       const uint64_t src[IPSEC_MAX_IV_QWORD], uint32_t len)
+{
+       RTE_BUILD_BUG_ON(IPSEC_MAX_IV_SIZE != 2 * sizeof(uint64_t));
+
+       switch (len) {
+       case IPSEC_MAX_IV_SIZE:
+               dst[1] = src[1];
+               /* fallthrough */
+       case sizeof(uint64_t):
+               dst[0] = src[0];
+               /* fallthrough */
+       case 0:
+               break;
+       default:
+               /* should never happen */
+               RTE_ASSERT(NULL);
+       }
+}
+
 /*
  * from RFC 4303 3.3.2.1.4:
  * If the ESN option is enabled for the SA, the high-order 32