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-rw-r--r--src/vnet/tcp/tcp_input.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/src/vnet/tcp/tcp_input.c b/src/vnet/tcp/tcp_input.c
index 49270314924..e0139a47e0c 100644
--- a/src/vnet/tcp/tcp_input.c
+++ b/src/vnet/tcp/tcp_input.c
@@ -411,7 +411,8 @@ tcp_rcv_ack_no_cc (tcp_connection_t * tc, vlib_buffer_t * b, u32 * error)
if (!(seq_leq (tc->snd_una, vnet_buffer (b)->tcp.ack_number)
&& seq_leq (vnet_buffer (b)->tcp.ack_number, tc->snd_nxt)))
{
- if (seq_leq (vnet_buffer (b)->tcp.ack_number, tc->snd_una_max))
+ if (seq_leq (vnet_buffer (b)->tcp.ack_number, tc->snd_una_max)
+ && seq_gt (vnet_buffer (b)->tcp.ack_number, tc->snd_una))
{
tc->snd_nxt = vnet_buffer (b)->tcp.ack_number;
goto acceptable;
@@ -1580,7 +1581,8 @@ tcp_rcv_ack (tcp_worker_ctx_t * wrk, tcp_connection_t * tc, vlib_buffer_t * b,
{
/* We've probably entered recovery and the peer still has some
* of the data we've sent. Update snd_nxt and accept the ack */
- if (seq_leq (vnet_buffer (b)->tcp.ack_number, tc->snd_una_max))
+ if (seq_leq (vnet_buffer (b)->tcp.ack_number, tc->snd_una_max)
+ && seq_gt (vnet_buffer (b)->tcp.ack_number, tc->snd_una))
{
tc->snd_nxt = vnet_buffer (b)->tcp.ack_number;
goto process_ack;