From: Marc-André Lureau <marcandre.lureau@redhat.com>

Untouched since original introduction in 2004.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
---
 slirp/tcp_input.c | 23 +----------------------
 1 file changed, 1 insertion(+), 22 deletions(-)

diff --git a/slirp/tcp_input.c b/slirp/tcp_input.c
index 0f073d4b38..c4d7abf1fa 100644
--- a/slirp/tcp_input.c
+++ b/slirp/tcp_input.c
@@ -60,27 +60,6 @@
  * Set DELACK for segments received in order, but ack immediately
  * when segments are out of order (so fast retransmit can work).
  */
-#ifdef TCP_ACK_HACK
-#define TCP_REASS(tp, ti, m, so, flags) {\
-       if ((ti)->ti_seq == (tp)->rcv_nxt && \
-           tcpfrag_list_empty(tp) && \
-           (tp)->t_state == TCPS_ESTABLISHED) {\
-               if (ti->ti_flags & TH_PUSH) \
-                       tp->t_flags |= TF_ACKNOW; \
-               else \
-                       tp->t_flags |= TF_DELACK; \
-               (tp)->rcv_nxt += (ti)->ti_len; \
-               flags = (ti)->ti_flags & TH_FIN; \
-               if (so->so_emu) { \
-		       if (tcp_emu((so),(m))) sbappend((so), (m)); \
-	       } else \
-		       sbappend((so), (m)); \
-	} else {\
-               (flags) = tcp_reass((tp), (ti), (m)); \
-               tp->t_flags |= TF_ACKNOW; \
-       } \
-}
-#else
 #define	TCP_REASS(tp, ti, m, so, flags) { \
 	if ((ti)->ti_seq == (tp)->rcv_nxt && \
         tcpfrag_list_empty(tp) && \
@@ -97,7 +76,7 @@
 		tp->t_flags |= TF_ACKNOW; \
 	} \
 }
-#endif
+
 static void tcp_dooptions(struct tcpcb *tp, u_char *cp, int cnt,
                           struct tcpiphdr *ti);
 static void tcp_xmit_timer(register struct tcpcb *tp, int rtt);
-- 
2.20.1