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path: root/src/plugins/wireguard/wireguard_output_tun.c
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-rw-r--r--src/plugins/wireguard/wireguard_output_tun.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/src/plugins/wireguard/wireguard_output_tun.c b/src/plugins/wireguard/wireguard_output_tun.c
index d1b1d6bb8f0..f613d6c0c16 100644
--- a/src/plugins/wireguard/wireguard_output_tun.c
+++ b/src/plugins/wireguard/wireguard_output_tun.c
@@ -307,6 +307,22 @@ error:
return ret;
}
+static_always_inline void
+wg_calc_checksum (vlib_main_t *vm, vlib_buffer_t *b)
+{
+ int bogus = 0;
+ u8 ip_ver_out = (*((u8 *) vlib_buffer_get_current (b)) >> 4);
+
+ /* IPv6 UDP checksum is mandatory */
+ if (ip_ver_out == 6)
+ {
+ ip6_header_t *ip6 =
+ (ip6_header_t *) ((u8 *) vlib_buffer_get_current (b));
+ udp_header_t *udp = ip6_next_header (ip6);
+ udp->checksum = ip6_tcp_udp_icmp_compute_checksum (vm, b, ip6, &bogus);
+ }
+}
+
/* is_ip4 - inner header flag */
always_inline uword
wg_output_tun_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
@@ -555,6 +571,14 @@ wg_output_tun_inline (vlib_main_t *vm, vlib_node_runtime_t *node,
/* wg-output-process-ops */
wg_output_process_ops (vm, node, ptd->crypto_ops, sync_bufs, nexts,
drop_next);
+
+ int n_left_from_sync_bufs = n_sync;
+ while (n_left_from_sync_bufs > 0)
+ {
+ n_left_from_sync_bufs--;
+ wg_calc_checksum (vm, sync_bufs[n_left_from_sync_bufs]);
+ }
+
vlib_buffer_enqueue_to_next (vm, node, sync_bi, nexts, n_sync);
}
if (n_async)
@@ -627,6 +651,11 @@ wg_output_tun_post (vlib_main_t *vm, vlib_node_runtime_t *node,
next[2] = (wg_post_data (b[2]))->next_index;
next[3] = (wg_post_data (b[3]))->next_index;
+ wg_calc_checksum (vm, b[0]);
+ wg_calc_checksum (vm, b[1]);
+ wg_calc_checksum (vm, b[2]);
+ wg_calc_checksum (vm, b[3]);
+
if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE))
{
if (b[0]->flags & VLIB_BUFFER_IS_TRACED)
@@ -671,6 +700,8 @@ wg_output_tun_post (vlib_main_t *vm, vlib_node_runtime_t *node,
while (n_left > 0)
{
+ wg_calc_checksum (vm, b[0]);
+
next[0] = (wg_post_data (b[0]))->next_index;
if (PREDICT_FALSE ((node->flags & VLIB_NODE_FLAG_TRACE) &&
(b[0]->flags & VLIB_BUFFER_IS_TRACED)))