xnu-3248.50.21.tar.gz

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

diff --git a/bsd/netinet/tcp_var.h b/bsd/netinet/tcp_var.h
index 510d1cd844b9b26766c80ee6b721edcea1ffa8de..7cce3784f3af9d126e6327d6d110d6655b98fc8c 100644 (file)
--- a/bsd/netinet/tcp_var.h
+++ b/bsd/netinet/tcp_var.h
@@ -93,12 +93,6 @@ struct name {                                \
 
 #define N_TIME_WAIT_SLOTS   128        /* must be power of 2 */
 
-/* Base RTT is stored for N_MIN_RTT_HISTORY slots. This is used to
- * estimate expected minimum RTT for delay based congestion control
- * algorithms.
- */
-#define N_RTT_BASE     5
-
 /* Always allow at least 4 packets worth of recv window when adjusting
  * recv window using inter-packet arrival jitter.
  */
@@ -451,8 +445,6 @@ struct tcpcb {
        } t_stat;
        
        /* Background congestion related state */
-       uint32_t        rtt_hist[N_RTT_BASE];   /* history of minimum RTT */
-       uint32_t        rtt_count;              /* Number of RTT samples in recent base history */
        uint32_t        bg_ssthresh;            /* Slow start threshold until delay increases */
        uint32_t        t_flagsext;             /* Another field to accommodate more flags */
 #define TF_RXTFINDROP          0x1                     /* Drop conn after retransmitting FIN 3 times */
@@ -605,6 +597,7 @@ struct tcpcb {
        u_int32_t       t_reordered_pkts;       /* packets reorderd */
        u_int32_t       t_dsack_sent;           /* Sent DSACK notification */
        u_int32_t       t_dsack_recvd;          /* Received a valid DSACK option */
+       u_int32_t       t_recv_throttle_ts;
 };
 
 #define IN_FASTRECOVERY(tp)    (tp->t_flags & TF_FASTRECOVERY)