xnu-4570.51.1.tar.gz

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

diff --git a/bsd/netinet/tcp_cc.h b/bsd/netinet/tcp_cc.h
index c78ba35318953e3eda247bef05b26a2b232d00ff..7c83900d175dcba2b2d6deb0525b69a92a4ff8f5 100644 (file)
--- a/bsd/netinet/tcp_cc.h
+++ b/bsd/netinet/tcp_cc.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010 Apple Inc. All rights reserved.
+ * Copyright (c) 2010-2014 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  *
@@ -62,19 +62,25 @@
 #define _NETINET_CC_H_
 
 #ifdef KERNEL
-
+#include <netinet/tcp.h>
 #include <netinet/tcp_var.h>
+#include <kern/zalloc.h>
 
-#define TCP_CC_ALGO_NEWRENO_INDEX 0    /* default congestion control algorithm */
-#define TCP_CC_ALGO_BACKGROUND_INDEX 1 /* congestion control for background transport */
-#define TCP_CC_ALGO_COUNT 2            /* Count of CC algorithms defined */
+#define        TCP_CC_ALGO_NONE                0
+#define        TCP_CC_ALGO_NEWRENO_INDEX       1
+#define        TCP_CC_ALGO_BACKGROUND_INDEX    2 /* CC for background transport */
+#define        TCP_CC_ALGO_CUBIC_INDEX         3 /* default CC algorithm */
+#define        TCP_CC_ALGO_COUNT               4 /* Count of CC algorithms */
 
 #define TCP_CA_NAME_MAX 16             /* Maximum characters in the name of a CC algorithm */
 
+extern int tcp_recv_bg;
+
 /*
- * Structure to hold definition various actions defined by a congestion control
- * algorithm for TCP. This can be used to change the congestion control on a 
- * connection based on the user settings of priority of a connection.
+ * Structure to hold definition various actions defined by a congestion 
+ * control algorithm for TCP. This can be used to change the congestion
+ * control on a connection based on the user settings of priority of a
+ * connection.
  */
 struct tcp_cc_algo {
        char name[TCP_CA_NAME_MAX];
@@ -84,20 +90,26 @@ struct tcp_cc_algo {
        /* init the congestion algorithm for the specified control block */
        int (*init) (struct tcpcb *tp);
 
-       /* cleanup any state that is stored in the connection related to the algorithm */
+       /*
+        * cleanup any state that is stored in the connection 
+        * related to the algorithm
+        */
        int (*cleanup) (struct tcpcb *tp); 
 
        /* initialize cwnd at the start of a connection */
        void (*cwnd_init) (struct tcpcb *tp);
 
-       /* called on the receipt of in-sequence ack during congestion avoidance phase */
-       void (*inseq_ack_rcvd) (struct tcpcb *tp, struct tcphdr *th);
+       /*
+        * called on the receipt of in-sequence ack during congestion
+        * avoidance phase
+        */
+       void (*congestion_avd) (struct tcpcb *tp, struct tcphdr *th);
 
        /* called on the receipt of a valid ack */
        void (*ack_rcvd) (struct tcpcb *tp, struct tcphdr *th);
 
        /* called before entering FR */
-       void (*pre_fr) (struct tcpcb *tp, struct tcphdr *th);
+       void (*pre_fr) (struct tcpcb *tp);
 
        /*  after exiting FR */
        void (*post_fr) (struct tcpcb *tp, struct tcphdr *th);
@@ -116,9 +128,31 @@ struct tcp_cc_algo {
 
 } __attribute__((aligned(4)));
 
+extern struct zone *tcp_cc_zone; 
+
 extern struct tcp_cc_algo* tcp_cc_algo_list[TCP_CC_ALGO_COUNT];
 
 #define CC_ALGO(tp) (tcp_cc_algo_list[tp->tcp_cc_index])
+#define        TCP_CC_CWND_INIT_BYTES  4380
+/*
+ * The congestion window will have to be reset after a
+ * non-validated period -- currently set to 3 minutes
+ */
+#define        TCP_CC_CWND_NONVALIDATED_PERIOD (3 * 60 * TCP_RETRANSHZ)
+
+extern void    tcp_cc_init(void);
+extern void tcp_cc_resize_sndbuf(struct tcpcb *tp);
+extern void tcp_bad_rexmt_fix_sndbuf(struct tcpcb *tp);
+extern void tcp_cc_cwnd_init_or_reset(struct tcpcb *tp);
+extern int tcp_cc_delay_ack(struct tcpcb *tp, struct tcphdr *th);
+extern void tcp_ccdbg_trace(struct tcpcb *tp, struct tcphdr *th,
+       int32_t event);
+extern void tcp_cc_allocate_state(struct tcpcb *tp);
+extern void tcp_cc_after_idle_stretchack(struct tcpcb *tp);
+extern uint32_t tcp_cc_is_cwnd_nonvalidated(struct tcpcb *tp);
+extern void tcp_cc_adjust_nonvalidated_cwnd(struct tcpcb *tp);
+extern u_int32_t tcp_get_max_pipeack(struct tcpcb *tp);
+extern void tcp_clear_pipeack_state(struct tcpcb *tp);
 
 #endif /* KERNEL */
 #endif /* _NETINET_CC_H_ */