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Diffstat (limited to 'src/vnet/ipsec/esp_decrypt.c')
-rw-r--r--src/vnet/ipsec/esp_decrypt.c10
1 files changed, 7 insertions, 3 deletions
diff --git a/src/vnet/ipsec/esp_decrypt.c b/src/vnet/ipsec/esp_decrypt.c
index 62b12dbbdf6..a0eeed464da 100644
--- a/src/vnet/ipsec/esp_decrypt.c
+++ b/src/vnet/ipsec/esp_decrypt.c
@@ -269,9 +269,13 @@ esp_decrypt_node_fn (vlib_main_t * vm,
{
tunnel_mode = 0;
- ih4 =
- (ip4_header_t *) ((u8 *) i_b0->data +
- vnet_buffer (i_b0)->l3_hdr_offset);
+ if (i_b0->flags & VNET_BUFFER_F_IS_IP4)
+ ih4 =
+ (ip4_header_t *) ((u8 *) esp0 - sizeof (ip4_header_t));
+ else
+ ih4 =
+ (ip4_header_t *) ((u8 *) esp0 - sizeof (ip6_header_t));
+
if (PREDICT_TRUE
((ih4->ip_version_and_header_length & 0xF0) != 0x40))
{