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-rw-r--r--src/vnet/ipsec/esp_encrypt.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/src/vnet/ipsec/esp_encrypt.c b/src/vnet/ipsec/esp_encrypt.c
index e06babd92ef..4793fddcd5a 100644
--- a/src/vnet/ipsec/esp_encrypt.c
+++ b/src/vnet/ipsec/esp_encrypt.c
@@ -463,6 +463,7 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
u8 *l2_hdr, l2_len, *ip_hdr, ip_len;
ip6_ext_header_t *ext_hdr;
udp_header_t *udp = 0;
+ u16 udp_len = 0;
u8 *old_ip_hdr = vlib_buffer_get_current (b[0]);
ip_len = is_ip6 ?
@@ -537,7 +538,7 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
if (udp)
{
esp_update_ip4_hdr (ip4, len, /* is_transport */ 1, 1);
- esp_fill_udp_hdr (sa0, udp, len - ip_len);
+ udp_len = len - ip_len;
}
else
esp_update_ip4_hdr (ip4, len, /* is_transport */ 1, 0);
@@ -545,6 +546,11 @@ esp_encrypt_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
clib_memcpy_le64 (ip_hdr, old_ip_hdr, ip_len);
+ if (udp)
+ {
+ esp_fill_udp_hdr (sa0, udp, udp_len);
+ }
+
if (!is_tun)
next[0] = ESP_ENCRYPT_NEXT_INTERFACE_OUTPUT;
}