xnu-2050.7.9.tar.gz

[apple/xnu.git] / bsd / netinet / tcp_timer.h

diff --git a/bsd/netinet/tcp_timer.h b/bsd/netinet/tcp_timer.h
index df1162053f2e7ef1db26a6e501feedc1d1bf0815..213e87a395f241ca9960ee70324097ff4def978b 100644 (file)
--- a/bsd/netinet/tcp_timer.h
+++ b/bsd/netinet/tcp_timer.h
@@ -145,11 +145,12 @@
 #define TCPTV_UNACKWIN ( TCP_RETRANSHZ/10 )    /* Window for counting rcv bytes to see if 
                                                   ack-stretching can start (default 100 ms) */
 #define TCPTV_MAXRCVIDLE (TCP_RETRANSHZ/5 )    /* Receiver idle time, avoid ack-stretching after that*/
+#define TCPTV_RCVBUFIDLE (TCP_RETRANSHZ/2)     /* Receiver idle time, for rcv socket buffer resizing */
 
 /* No ack stretching during slow-start, until we see some packets.
  * By the time the receiver gets 512 packets, the senders cwnd 
- * should open by a few hundred packets considering the progression
- * during slow-start.
+ * should open by a few hundred packets consdering the 
+ * slow-start progression.
  */
 #define TCP_RCV_SS_PKTCOUNT     512
 
@@ -232,7 +233,7 @@ struct tcptimerlist {
 #define TCPTV_REXMTSLOP ( TCP_RETRANSHZ/5 )    /* rexmt slop allowed (200 ms) */
 
 /* macro to decide when retransmit slop (described above) should be added */
-#define TCP_ADD_REXMTSLOP(tp) ((tp->t_flags & TF_LOCAL) != 0 || tp->t_state >= TCPS_ESTABLISHED) 
+#define TCP_ADD_REXMTSLOP(tp) (tp->t_state >= TCPS_ESTABLISHED) 
 
 #define        TCPT_RANGESET(tv, value, tvmin, tvmax, addslop) do { \
        (tv) = ((addslop) ? tcp_rexmt_slop : 0) + (value); \
@@ -246,6 +247,13 @@ struct tcptimerlist {
        (tp->t_keepidle && (tp->t_inpcb->inp_socket->so_options & SO_KEEPALIVE) ? \
                tp->t_keepidle : tcp_keepidle)
 
+/* Since we did not add rexmt slop for local connections, we should add
+ * it to idle timeout. Otherwise local connections will reach idle state
+ * quickly
+ */
+#define TCP_IDLETIMEOUT(tp) \
+       (((TCP_ADD_REXMTSLOP(tp)) ? 0 : tcp_rexmt_slop) + tp->t_rxtcur)
+
 extern int tcp_keepinit;               /* time to establish connection */
 extern int tcp_keepidle;               /* time before keepalive probes begin */
 extern int tcp_keepintvl;              /* time between keepalive probes */