xnu-344.32.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 480ff21d0ef4e2e4c97e8dac0dac89b4e2dcb711..80bf16e9aac51ed963df1226c0645b8c988e26cf 100644 (file)
--- a/bsd/netinet/tcp_var.h
+++ b/bsd/netinet/tcp_var.h
@@ -52,61 +52,56 @@
  * SUCH DAMAGE.
  *
  *     @(#)tcp_var.h   8.4 (Berkeley) 5/24/95
  * SUCH DAMAGE.
  *
  *     @(#)tcp_var.h   8.4 (Berkeley) 5/24/95

+ * $FreeBSD: src/sys/netinet/tcp_var.h,v 1.56.2.8 2001/08/22 00:59:13 silby Exp $

  */
 
 #ifndef _NETINET_TCP_VAR_H_
 #define _NETINET_TCP_VAR_H_
  */
 
 #ifndef _NETINET_TCP_VAR_H_
 #define _NETINET_TCP_VAR_H_

+#include <sys/appleapiopts.h>
+#include <netinet/tcp_timer.h>
+#ifdef __APPLE_API_PRIVATE
+

 #define N_TIME_WAIT_SLOTS   128                /* must be power of 2 */
 
 /*
 #define N_TIME_WAIT_SLOTS   128                /* must be power of 2 */
 
 /*

- * Ip (reassembly or sequence) queue structures.
- *
- * XXX -- The following explains why the ipqe_m field is here, for TCP's use:
- * We want to avoid doing m_pullup on incoming packets but that
- * means avoiding dtom on the tcp reassembly code.  That in turn means
- * keeping an mbuf pointer in the reassembly queue (since we might
- * have a cluster).  As a quick hack, the source & destination
- * port numbers (which are no longer needed once we've located the
- * tcpcb) are overlayed with an mbuf pointer.
+ * Kernel variables for tcp.

  */
  */

-LIST_HEAD(ipqehead, ipqent);
-struct ipqent {
-       LIST_ENTRY(ipqent) ipqe_q;
-       union {
-               struct ip       *_ip;
-#if INET6
-               struct ipv6     *_ip6;
-#endif
-               struct tcpiphdr *_tcp;
-       } _ipqe_u1;
-       struct mbuf     *ipqe_m;        /* mbuf contains packet */
-       u_int8_t        ipqe_mff;       /* for IP fragmentation */
+
+/* TCP segment queue entry */
+struct tseg_qent {
+       LIST_ENTRY(tseg_qent) tqe_q;
+       int     tqe_len;                /* TCP segment data length */
+       struct  tcphdr *tqe_th;         /* a pointer to tcp header */
+       struct  mbuf    *tqe_m;         /* mbuf contains packet */

 };
 };

-#define        ipqe_ip         _ipqe_u1._ip
-#if INET6
-#define        ipqe_ip6        _ipqe_u1._ip6
+LIST_HEAD(tsegqe_head, tseg_qent);
+#ifdef MALLOC_DECLARE
+MALLOC_DECLARE(M_TSEGQ);

 #endif
 #endif

-#define        ipqe_tcp        _ipqe_u1._tcp
+
+struct tcptemp {
+       u_char  tt_ipgen[40]; /* the size must be of max ip header, now IPv6 */
+       struct  tcphdr tt_t;
+};
+

 #define tcp6cb         tcpcb  /* for KAME src sync over BSD*'s */
 
 #define tcp6cb         tcpcb  /* for KAME src sync over BSD*'s */
 

+#ifdef __APPLE__

 #define TCP_DELACK_BITSET(hash_elem)\
 delack_bitmask[((hash_elem) >> 5)] |= 1 << ((hash_elem) & 0x1F)
 
 #define DELACK_BITMASK_ON     1
 #define DELACK_BITMASK_THRESH 300
 #define TCP_DELACK_BITSET(hash_elem)\
 delack_bitmask[((hash_elem) >> 5)] |= 1 << ((hash_elem) & 0x1F)
 
 #define DELACK_BITMASK_ON     1
 #define DELACK_BITMASK_THRESH 300

-
-/*
- * Kernel variables for tcp.
- */
+#endif

 
 /*
  * Tcp control block, one per tcp; fields:
  * Organized for 16 byte cacheline efficiency.
  */
 struct tcpcb {
 
 /*
  * Tcp control block, one per tcp; fields:
  * Organized for 16 byte cacheline efficiency.
  */
 struct tcpcb {

-       struct ipqehead segq;           /* sequencing queue */
+       struct  tsegqe_head t_segq;

        int     t_dupacks;              /* consecutive dup acks recd */
        int     t_dupacks;              /* consecutive dup acks recd */

-       struct tcptemp  *t_template;    /* skeletal packet for transmit */
+       struct  tcptemp *unused;        /* unused now: was t_template */

 
        int     t_timer[TCPT_NTIMERS];  /* tcp timers */
 
 
        int     t_timer[TCPT_NTIMERS];  /* tcp timers */
 


@@ -130,6 +125,10 @@ struct tcpcb {
 #define        TF_RCVD_CC      0x04000         /* a CC was received in SYN */
 #define        TF_SENDCCNEW    0x08000         /* send CCnew instead of CC in SYN */
 #define        TF_MORETOCOME   0x10000         /* More data to be appended to sock */
 #define        TF_RCVD_CC      0x04000         /* a CC was received in SYN */
 #define        TF_SENDCCNEW    0x08000         /* send CCnew instead of CC in SYN */
 #define        TF_MORETOCOME   0x10000         /* More data to be appended to sock */

+#define        TF_LQ_OVERFLOW  0x20000         /* listen queue overflow */
+#define        TF_RXWIN0SENT   0x40000         /* sent a receiver win 0 in response */
+#define        TF_SLOWLINK     0x80000         /* route is a on a modem speed link */
+

        int     t_force;                /* 1 if forcing out a byte */
 
        tcp_seq snd_una;                /* send unacknowledged */
        int     t_force;                /* 1 if forcing out a byte */
 
        tcp_seq snd_una;                /* send unacknowledged */


@@ -157,12 +156,12 @@ struct tcpcb {
                                         */
        u_int   t_maxopd;               /* mss plus options */
 
                                         */
        u_int   t_maxopd;               /* mss plus options */
 

-       u_int   t_idle;                 /* inactivity time */
-       u_long  t_duration;             /* connection duration */
-       int     t_rtt;                  /* round trip time */
+       u_long  t_rcvtime;              /* inactivity time */
+       u_long  t_starttime;            /* time connection was established */
+       int     t_rtttime;              /* round trip time */

        tcp_seq t_rtseq;                /* sequence number being timed */
 
        tcp_seq t_rtseq;                /* sequence number being timed */
 

-       int     t_rxtcur;               /* current retransmit value */
+       int     t_rxtcur;               /* current retransmit value (ticks) */

        u_int   t_maxseg;               /* maximum segment size */
        int     t_srtt;                 /* smoothed round-trip time */
        int     t_rttvar;               /* variance in round-trip time */
        u_int   t_maxseg;               /* maximum segment size */
        int     t_srtt;                 /* smoothed round-trip time */
        int     t_rttvar;               /* variance in round-trip time */


@@ -190,6 +189,11 @@ struct tcpcb {
 /* RFC 1644 variables */
        tcp_cc  cc_send;                /* send connection count */
        tcp_cc  cc_recv;                /* receive connection count */
 /* RFC 1644 variables */
        tcp_cc  cc_send;                /* send connection count */
        tcp_cc  cc_recv;                /* receive connection count */

+       tcp_seq snd_recover;            /* for use in fast recovery */
+/* experimental */
+       u_long  snd_cwnd_prev;          /* cwnd prior to retransmit */
+       u_long  snd_ssthresh_prev;      /* ssthresh prior to retransmit */
+       u_long  t_badrxtwin;            /* window for retransmit recovery */

 };
 
 /*
 };
 
 /*


@@ -208,7 +212,7 @@ struct tcpopt {
        u_long  to_tsecr;
        tcp_cc  to_cc;          /* holds CC or CCnew */
        tcp_cc  to_ccecho;
        u_long  to_tsecr;
        tcp_cc  to_cc;          /* holds CC or CCnew */
        tcp_cc  to_ccecho;

-       u_short to_maxseg;
+       u_short         reserved;               /* unused now: was to_maxseg */

 };
 
 /*
 };
 
 /*


@@ -265,7 +269,9 @@ struct rmxp_tao {
 #define        TCP_REXMTVAL(tp) \
        max((tp)->t_rttmin, (((tp)->t_srtt >> (TCP_RTT_SHIFT - TCP_DELTA_SHIFT))  \
          + (tp)->t_rttvar) >> TCP_DELTA_SHIFT)
 #define        TCP_REXMTVAL(tp) \
        max((tp)->t_rttmin, (((tp)->t_srtt >> (TCP_RTT_SHIFT - TCP_DELTA_SHIFT))  \
          + (tp)->t_rttvar) >> TCP_DELTA_SHIFT)

+#endif /* __APPLE_API_PRIVATE */

 
 

+#ifdef __APPLE_API_UNSTABLE

 /*
  * TCP statistics.
  * Many of these should be kept per connection,
 /*
  * TCP statistics.
  * Many of these should be kept per connection,


@@ -336,6 +342,7 @@ struct      tcpstat {
        u_long  tcps_mturesent;         /* resends due to MTU discovery */
        u_long  tcps_listendrop;        /* listen queue overflows */
 };
        u_long  tcps_mturesent;         /* resends due to MTU discovery */
        u_long  tcps_listendrop;        /* listen queue overflows */
 };

+#endif /* __APPLE_API_UNSTABLE */

 
 /*
  * TCB structure exported to user-land via sysctl(3).
 
 /*
  * TCB structure exported to user-land via sysctl(3).


@@ -364,10 +371,11 @@ struct    xtcpcb {
 #define        TCPCTL_KEEPINTVL        7       /* interval to send keepalives */
 #define        TCPCTL_SENDSPACE        8       /* send buffer space */
 #define        TCPCTL_RECVSPACE        9       /* receive buffer space */
 #define        TCPCTL_KEEPINTVL        7       /* interval to send keepalives */
 #define        TCPCTL_SENDSPACE        8       /* send buffer space */
 #define        TCPCTL_RECVSPACE        9       /* receive buffer space */

-#define        TCPCTL_KEEPINIT         10      /* receive buffer space */
+#define        TCPCTL_KEEPINIT         10      /* timeout for establishing syn */

 #define        TCPCTL_PCBLIST          11      /* list of all outstanding PCBs */
 #define        TCPCTL_PCBLIST          11      /* list of all outstanding PCBs */

-#define        TCPCTL_V6MSSDFLT        12      /* MSS default for IPv6 */
-#define TCPCTL_MAXID           13
+#define        TCPCTL_DELACKTIME       12      /* time before sending delayed ACK */
+#define        TCPCTL_V6MSSDFLT        13      /* MSS default for IPv6 */
+#define        TCPCTL_MAXID            14

 
 #define TCPCTL_NAMES { \
        { 0, 0 }, \
 
 #define TCPCTL_NAMES { \
        { 0, 0 }, \


@@ -382,9 +390,11 @@ struct     xtcpcb {
        { "recvspace", CTLTYPE_INT }, \
        { "keepinit", CTLTYPE_INT }, \
        { "pcblist", CTLTYPE_STRUCT }, \
        { "recvspace", CTLTYPE_INT }, \
        { "keepinit", CTLTYPE_INT }, \
        { "pcblist", CTLTYPE_STRUCT }, \

+       { "delacktime", CTLTYPE_INT }, \

        { "v6mssdflt", CTLTYPE_INT }, \
 }
 
        { "v6mssdflt", CTLTYPE_INT }, \
 }
 

+#ifdef __APPLE_API_PRIVATE

 #ifdef KERNEL
 #ifdef SYSCTL_DECL
 SYSCTL_DECL(_net_inet_tcp);
 #ifdef KERNEL
 #ifdef SYSCTL_DECL
 SYSCTL_DECL(_net_inet_tcp);


@@ -394,18 +404,20 @@ extern    struct inpcbhead tcb;           /* head of queue of active tcpcb's */
 extern struct inpcbinfo tcbinfo;
 extern struct tcpstat tcpstat; /* tcp statistics */
 extern int tcp_mssdflt;        /* XXX */
 extern struct inpcbinfo tcbinfo;
 extern struct tcpstat tcpstat; /* tcp statistics */
 extern int tcp_mssdflt;        /* XXX */

-extern int tcp_v6mssdflt;      /* XXX */
-extern u_long tcp_now;         /* for RFC 1323 timestamps */

 extern int tcp_delack_enabled;
 extern int tcp_delack_enabled;

+extern int tcp_do_newreno;
+extern int ss_fltsz;
+extern int ss_fltsz_local;
+#ifdef __APPLE__
+extern u_long tcp_now;         /* for RFC 1323 timestamps */ 
+extern int tcp_delack_enabled;
+#endif
+

 
 void    tcp_canceltimers __P((struct tcpcb *));
 struct tcpcb *
         tcp_close __P((struct tcpcb *));
 void    tcp_ctlinput __P((int, struct sockaddr *, void *));
 
 void    tcp_canceltimers __P((struct tcpcb *));
 struct tcpcb *
         tcp_close __P((struct tcpcb *));
 void    tcp_ctlinput __P((int, struct sockaddr *, void *));

-#if INET6
-struct ip6_hdr;
-void    tcp6_ctlinput __P((int, struct sockaddr *,void *));
-#endif

 int     tcp_ctloutput __P((struct socket *, struct sockopt *));
 struct tcpcb *
         tcp_drop __P((struct tcpcb *, int));
 int     tcp_ctloutput __P((struct socket *, struct sockopt *));
 struct tcpcb *
         tcp_drop __P((struct tcpcb *, int));


@@ -413,74 +425,36 @@ void       tcp_drain __P((void));
 void    tcp_fasttimo __P((void));
 struct rmxp_tao *
         tcp_gettaocache __P((struct inpcb *));
 void    tcp_fasttimo __P((void));
 struct rmxp_tao *
         tcp_gettaocache __P((struct inpcb *));

-void     tcp_init __P((void));
-#if INET6
-void     tcp6_init __P((void));
-int     tcp6_input __P((struct mbuf **, int *, int));
-#endif /* INET6 */
+void    tcp_init __P((void));

 void    tcp_input __P((struct mbuf *, int));
 void    tcp_input __P((struct mbuf *, int));

-#if INET6
-void    tcp_mss __P((struct tcpcb *, int, int));
-int     tcp_mssopt __P((struct tcpcb *, int));
-#else /* INET6 */

 void    tcp_mss __P((struct tcpcb *, int));
 int     tcp_mssopt __P((struct tcpcb *));
 void    tcp_mss __P((struct tcpcb *, int));
 int     tcp_mssopt __P((struct tcpcb *));

-#endif /* INET6 */
-
+void    tcp_drop_syn_sent __P((struct inpcb *, int));

 void    tcp_mtudisc __P((struct inpcb *, int));
 struct tcpcb *
         tcp_newtcpcb __P((struct inpcb *));
 int     tcp_output __P((struct tcpcb *));
 void    tcp_quench __P((struct inpcb *, int));
 void    tcp_mtudisc __P((struct inpcb *, int));
 struct tcpcb *
         tcp_newtcpcb __P((struct inpcb *));
 int     tcp_output __P((struct tcpcb *));
 void    tcp_quench __P((struct inpcb *, int));

-#if INET6
-void    tcp_respond __P((struct tcpcb *, void *, struct tcphdr *,
-                         struct mbuf *, tcp_seq, tcp_seq, int, int));
-#else /* INET6 */
-void    tcp_respond __P((struct tcpcb *, void *, struct tcphdr *,
-                         struct mbuf *, tcp_seq, tcp_seq, int));
-#endif /* INET6 */
-
+void    tcp_respond __P((struct tcpcb *, void *,
+           struct tcphdr *, struct mbuf *, tcp_seq, tcp_seq, int));

 struct rtentry *
         tcp_rtlookup __P((struct inpcb *));
 struct rtentry *
         tcp_rtlookup __P((struct inpcb *));

-#if INET6
-struct rtentry *
-        tcp_rtlookup6 __P((struct inpcb *));
-#endif /* INET6 */

 void    tcp_setpersist __P((struct tcpcb *));
 void    tcp_slowtimo __P((void));
 struct tcptemp *
 void    tcp_setpersist __P((struct tcpcb *));
 void    tcp_slowtimo __P((void));
 struct tcptemp *

-        tcp_template __P((struct tcpcb *));
+        tcp_maketemplate __P((struct tcpcb *));
+void    tcp_fillheaders __P((struct tcpcb *, void *, void *));

 struct tcpcb *
         tcp_timers __P((struct tcpcb *, int));
 struct tcpcb *
         tcp_timers __P((struct tcpcb *, int));

-#if INET6
-void    tcp_trace __P((int, int, struct tcpcb *, void *, struct tcphdr *, 
+void    tcp_trace __P((int, int, struct tcpcb *, void *, struct tcphdr *,

                        int));
                        int));

-#else
-void    tcp_trace __P((int, int, struct tcpcb *, struct ip *,
-                       struct tcphdr *, int));
-#endif
-
-#if INET6
-int     tcp_reass __P((struct tcpcb *, struct tcphdr *, int,
-           struct mbuf *, int));
-#else /* INET6 */
-int     tcp_reass __P((struct tcpcb *, struct tcphdr *, int, struct mbuf *));
-/* suppress INET6 only args */
-#define tcp_reass(x, y, z, t, i)               tcp_reass(x, y, z, t)
-#define tcp_mss(x, y, i)                       tcp_mss(x, y)
-#define tcp_mssopt(x, i)                       tcp_mssopt(x)
-#define tcp_respond(x, y, z, m, s1, s2, f, i)  tcp_respond(x, y, z, m, s1, \
-                                                           s2, f)
-
-#endif /* INET6 */

 
 extern struct pr_usrreqs tcp_usrreqs;
 
 extern struct pr_usrreqs tcp_usrreqs;

-#if INET6
-extern struct pr_usrreqs tcp6_usrreqs;
-#endif /* INET6 */

 extern u_long tcp_sendspace;
 extern u_long tcp_recvspace;
 extern u_long tcp_sendspace;
 extern u_long tcp_recvspace;

+tcp_seq tcp_new_isn __P((struct tcpcb *));

 
 #endif /* KERNEL */
 
 #endif /* KERNEL */

+#endif /* __APPLE_API_PRIVATE */

 
 #endif /* _NETINET_TCP_VAR_H_ */
 
 #endif /* _NETINET_TCP_VAR_H_ */