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-rw-r--r--src/vnet/ipsec/ah_encrypt.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/src/vnet/ipsec/ah_encrypt.c b/src/vnet/ipsec/ah_encrypt.c
index d12ca6704f0..1be4b3af7b7 100644
--- a/src/vnet/ipsec/ah_encrypt.c
+++ b/src/vnet/ipsec/ah_encrypt.c
@@ -216,12 +216,12 @@ ah_encrypt_inline (vlib_main_t * vm,
/* transport mode save the eth header before it is overwritten */
if (PREDICT_FALSE (!ipsec_sa_is_set_IS_TUNNEL (sa0)))
{
- ethernet_header_t *ieh0 = (ethernet_header_t *)
- ((u8 *) vlib_buffer_get_current (b[0]) -
- sizeof (ethernet_header_t));
- ethernet_header_t *oeh0 =
- (ethernet_header_t *) ((u8 *) ieh0 + (adv - icv_size));
- clib_memcpy_fast (oeh0, ieh0, sizeof (ethernet_header_t));
+ const u32 l2_len = vnet_buffer (b[0])->ip.save_rewrite_length;
+ u8 *l2_hdr_in = (u8 *) vlib_buffer_get_current (b[0]) - l2_len;
+
+ u8 *l2_hdr_out = l2_hdr_in + adv - icv_size;
+
+ clib_memcpy_le32 (l2_hdr_out, l2_hdr_in, l2_len);
}
vlib_buffer_advance (b[0], adv - icv_size);