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-rw-r--r--src/vnet/tcp/tcp.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/src/vnet/tcp/tcp.c b/src/vnet/tcp/tcp.c
index e447fac00b5..a6c1e216c20 100644
--- a/src/vnet/tcp/tcp.c
+++ b/src/vnet/tcp/tcp.c
@@ -1272,6 +1272,27 @@ tcp_session_flush_data (transport_connection_t * tconn)
tc->psh_seq = tc->snd_una + transport_max_tx_dequeue (tconn) - 1;
}
+static int
+tcp_session_app_rx_evt (transport_connection_t *conn)
+{
+ tcp_connection_t *tc = (tcp_connection_t *) conn;
+ u32 min_free, lo = 4 << 10, hi = 128 << 10;
+
+ if (!(tc->flags & TCP_CONN_ZERO_RWND_SENT))
+ return 0;
+
+ min_free = clib_clamp (transport_rx_fifo_size (conn) >> 3, lo, hi);
+ if (transport_max_rx_enqueue (conn) < min_free)
+ {
+ transport_rx_fifo_req_deq_ntf (conn);
+ return 0;
+ }
+
+ tcp_send_ack (tc);
+
+ return 0;
+}
+
/* *INDENT-OFF* */
const static transport_proto_vft_t tcp_proto = {
.enable = vnet_tcp_enable_disable,
@@ -1291,6 +1312,7 @@ const static transport_proto_vft_t tcp_proto = {
.update_time = tcp_update_time,
.flush_data = tcp_session_flush_data,
.custom_tx = tcp_session_custom_tx,
+ .app_rx_evt = tcp_session_app_rx_evt,
.format_connection = format_tcp_session,
.format_listener = format_tcp_listener_session,
.format_half_open = format_tcp_half_open_session,