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-rw-r--r--tcp.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/tcp.c b/tcp.c
index baf3c08..9f9b62d 100644
--- a/tcp.c
+++ b/tcp.c
@@ -2007,7 +2007,8 @@ static void tcp_data_from_tap(struct ctx *c, struct tcp_tap_conn *conn,
ack_seq - max_ack_seq < MAX_WINDOW) {
/* Fast re-transmit */
- retr = !len && ack_seq == max_ack_seq &&
+ retr = !len && !th->fin &&
+ ack_seq == max_ack_seq &&
max_ack_seq_wnd == ntohs(th->window);
max_ack_seq_wnd = ntohs(th->window);