*
* @APPLE_LICENSE_HEADER_START@
*
- * Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
- *
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
#ifndef _NETINET_TCP_VAR_H_
#define _NETINET_TCP_VAR_H_
#include <sys/appleapiopts.h>
+#include <sys/queue.h>
+#include <netinet/in_pcb.h>
#include <netinet/tcp_timer.h>
-#ifdef __APPLE_API_PRIVATE
+
+#ifdef KERNEL_PRIVATE
#define N_TIME_WAIT_SLOTS 128 /* must be power of 2 */
struct mbuf *tqe_m; /* mbuf contains packet */
};
LIST_HEAD(tsegqe_head, tseg_qent);
+extern int tcp_reass_maxseg;
+extern int tcp_reass_qsize;
#ifdef MALLOC_DECLARE
MALLOC_DECLARE(M_TSEGQ);
#endif
#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
-#endif
-
/*
* Tcp control block, one per tcp; fields:
* Organized for 16 byte cacheline efficiency.
*/
-#if KERNEL
struct tcpcb {
struct tsegqe_head t_segq;
int t_dupacks; /* consecutive dup acks recd */
/* 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 */
+ tcp_seq snd_recover; /* for use in NewReno 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 */
int t_keepidle; /* keepalive idle timer (override global if > 0) */
+ int t_lastchain; /* amount of packets chained last time around */
+
+/* 3529618 MSS overload prevention */
+ u_long rcv_reset;
+ u_long rcv_pps;
+ u_long rcv_byps;
+ tcp_seq snd_high; /* for use in NewReno Fast Recovery */
+ tcp_seq snd_high_prev; /* snd_high prior to retransmit */
+
};
-#else
-#define tcpcb otcpcb
+/*
+ * Structure to hold TCP options that are only used during segment
+ * processing (in tcp_input), but not held in the tcpcb.
+ * It's basically used to reduce the number of parameters
+ * to tcp_dooptions.
+ */
+struct tcpopt {
+ u_long to_flag; /* which options are present */
+#define TOF_TS 0x0001 /* timestamp */
+#define TOF_CC 0x0002 /* CC and CCnew are exclusive */
+#define TOF_CCNEW 0x0004
+#define TOF_CCECHO 0x0008
+ u_long to_tsval;
+ u_long to_tsecr;
+ tcp_cc to_cc; /* holds CC or CCnew */
+ tcp_cc to_ccecho;
+ u_short reserved; /* unused now: was to_maxseg */
+};
-#endif
+/*
+ * The TAO cache entry which is stored in the protocol family specific
+ * portion of the route metrics.
+ */
+struct rmxp_tao {
+ tcp_cc tao_cc; /* latest CC in valid SYN */
+ tcp_cc tao_ccsent; /* latest CC sent to peer */
+ u_short tao_mssopt; /* peer's cached MSS */
+#ifdef notyet
+ u_short tao_flags; /* cache status flags */
+#define TAOF_DONT 0x0001 /* peer doesn't understand rfc1644 */
+#define TAOF_OK 0x0002 /* peer does understand rfc1644 */
+#define TAOF_UNDEF 0 /* we don't know yet */
+#endif /* notyet */
+};
+#define rmx_taop(r) ((struct rmxp_tao *)(r).rmx_filler)
+
+#define intotcpcb(ip) ((struct tcpcb *)(ip)->inp_ppcb)
+#define sototcpcb(so) (intotcpcb(sotoinpcb(so)))
+/*
+ * The smoothed round-trip time and estimated variance
+ * are stored as fixed point numbers scaled by the values below.
+ * For convenience, these scales are also used in smoothing the average
+ * (smoothed = (1/scale)sample + ((scale-1)/scale)smoothed).
+ * With these scales, srtt has 3 bits to the right of the binary point,
+ * and thus an "ALPHA" of 0.875. rttvar has 2 bits to the right of the
+ * binary point, and is smoothed with an ALPHA of 0.75.
+ */
+#define TCP_RTT_SCALE 32 /* multiplier for srtt; 3 bits frac. */
+#define TCP_RTT_SHIFT 5 /* shift for srtt; 3 bits frac. */
+#define TCP_RTTVAR_SCALE 16 /* multiplier for rttvar; 2 bits */
+#define TCP_RTTVAR_SHIFT 4 /* shift for rttvar; 2 bits */
+#define TCP_DELTA_SHIFT 2 /* see tcp_input.c */
+
+/*
+ * The initial retransmission should happen at rtt + 4 * rttvar.
+ * Because of the way we do the smoothing, srtt and rttvar
+ * will each average +1/2 tick of bias. When we compute
+ * the retransmit timer, we want 1/2 tick of rounding and
+ * 1 extra tick because of +-1/2 tick uncertainty in the
+ * firing of the timer. The bias will give us exactly the
+ * 1.5 tick we need. But, because the bias is
+ * statistical, we have to test that we don't drop below
+ * the minimum feasible timer (which is 2 ticks).
+ * This version of the macro adapted from a paper by Lawrence
+ * Brakmo and Larry Peterson which outlines a problem caused
+ * by insufficient precision in the original implementation,
+ * which results in inappropriately large RTO values for very
+ * fast networks.
+ */
+#define TCP_REXMTVAL(tp) \
+ max((tp)->t_rttmin, (((tp)->t_srtt >> (TCP_RTT_SHIFT - TCP_DELTA_SHIFT)) \
+ + (tp)->t_rttvar) >> TCP_DELTA_SHIFT)
/*
* Jaguar compatible TCP control block, for xtcpcb
* Does not have the old fields
*/
struct otcpcb {
+#else
+struct tseg_qent;
+LIST_HEAD(tsegqe_head, tseg_qent);
+
+struct tcpcb {
+#endif /* KERNEL_PRIVATE */
struct tsegqe_head t_segq;
int t_dupacks; /* consecutive dup acks recd */
struct tcptemp *unused; /* unused now: was t_template */
/* 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 */
+ 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 */
};
-
-/*
- * Structure to hold TCP options that are only used during segment
- * processing (in tcp_input), but not held in the tcpcb.
- * It's basically used to reduce the number of parameters
- * to tcp_dooptions.
- */
-struct tcpopt {
- u_long to_flag; /* which options are present */
-#define TOF_TS 0x0001 /* timestamp */
-#define TOF_CC 0x0002 /* CC and CCnew are exclusive */
-#define TOF_CCNEW 0x0004
-#define TOF_CCECHO 0x0008
- u_long to_tsval;
- u_long to_tsecr;
- tcp_cc to_cc; /* holds CC or CCnew */
- tcp_cc to_ccecho;
- u_short reserved; /* unused now: was to_maxseg */
-};
-
-/*
- * The TAO cache entry which is stored in the protocol family specific
- * portion of the route metrics.
- */
-struct rmxp_tao {
- tcp_cc tao_cc; /* latest CC in valid SYN */
- tcp_cc tao_ccsent; /* latest CC sent to peer */
- u_short tao_mssopt; /* peer's cached MSS */
-#ifdef notyet
- u_short tao_flags; /* cache status flags */
-#define TAOF_DONT 0x0001 /* peer doesn't understand rfc1644 */
-#define TAOF_OK 0x0002 /* peer does understand rfc1644 */
-#define TAOF_UNDEF 0 /* we don't know yet */
-#endif /* notyet */
-};
-#define rmx_taop(r) ((struct rmxp_tao *)(r).rmx_filler)
-
-#define intotcpcb(ip) ((struct tcpcb *)(ip)->inp_ppcb)
-#define sototcpcb(so) (intotcpcb(sotoinpcb(so)))
-
-/*
- * The smoothed round-trip time and estimated variance
- * are stored as fixed point numbers scaled by the values below.
- * For convenience, these scales are also used in smoothing the average
- * (smoothed = (1/scale)sample + ((scale-1)/scale)smoothed).
- * With these scales, srtt has 3 bits to the right of the binary point,
- * and thus an "ALPHA" of 0.875. rttvar has 2 bits to the right of the
- * binary point, and is smoothed with an ALPHA of 0.75.
- */
-#define TCP_RTT_SCALE 32 /* multiplier for srtt; 3 bits frac. */
-#define TCP_RTT_SHIFT 5 /* shift for srtt; 3 bits frac. */
-#define TCP_RTTVAR_SCALE 16 /* multiplier for rttvar; 2 bits */
-#define TCP_RTTVAR_SHIFT 4 /* shift for rttvar; 2 bits */
-#define TCP_DELTA_SHIFT 2 /* see tcp_input.c */
-
-/*
- * The initial retransmission should happen at rtt + 4 * rttvar.
- * Because of the way we do the smoothing, srtt and rttvar
- * will each average +1/2 tick of bias. When we compute
- * the retransmit timer, we want 1/2 tick of rounding and
- * 1 extra tick because of +-1/2 tick uncertainty in the
- * firing of the timer. The bias will give us exactly the
- * 1.5 tick we need. But, because the bias is
- * statistical, we have to test that we don't drop below
- * the minimum feasible timer (which is 2 ticks).
- * This version of the macro adapted from a paper by Lawrence
- * Brakmo and Larry Peterson which outlines a problem caused
- * by insufficient precision in the original implementation,
- * which results in inappropriately large RTO values for very
- * fast networks.
- */
-#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,
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).
* Evil hack: declare only if in_pcb.h and sys/socketvar.h have been
* included. Not all of our clients do.
*/
-#if defined(_NETINET_IN_PCB_H_) && defined(_SYS_SOCKETVAR_H_)
struct xtcpcb {
size_t xt_len;
+#ifdef KERNEL_PRIVATE
+ struct inpcb_compat xt_inp;
+#else
struct inpcb xt_inp;
-#if KERNEL
+#endif
+#ifdef KERNEL_PRIVATE
struct otcpcb xt_tp;
#else
struct tcpcb xt_tp;
struct xsocket xt_socket;
u_quad_t xt_alignment_hack;
};
-#endif
/*
* Names for TCP sysctl objects
#define TCPCTL_V6MSSDFLT 13 /* MSS default for IPv6 */
#define TCPCTL_MAXID 14
+#ifdef KERNEL_PRIVATE
#define TCPCTL_NAMES { \
{ 0, 0 }, \
{ "rfc1323", CTLTYPE_INT }, \
{ "v6mssdflt", CTLTYPE_INT }, \
}
-#ifdef __APPLE_API_PRIVATE
-#ifdef KERNEL
#ifdef SYSCTL_DECL
SYSCTL_DECL(_net_inet_tcp);
-#endif
+#endif /* SYSCTL_DECL */
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 int tcp_delack_enabled;
+extern int tcp_minmss;
+extern int tcp_minmssoverload;
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
+#endif /* __APPLE__ */
-void tcp_canceltimers __P((struct tcpcb *));
+void tcp_canceltimers(struct tcpcb *);
struct tcpcb *
- tcp_close __P((struct tcpcb *));
-void tcp_ctlinput __P((int, struct sockaddr *, void *));
-int tcp_ctloutput __P((struct socket *, struct sockopt *));
+ tcp_close(struct tcpcb *);
+void tcp_ctlinput(int, struct sockaddr *, void *);
+int tcp_ctloutput(struct socket *, struct sockopt *);
struct tcpcb *
- tcp_drop __P((struct tcpcb *, int));
-void tcp_drain __P((void));
-void tcp_fasttimo __P((void));
+ tcp_drop(struct tcpcb *, int);
+void tcp_drain(void);
+void tcp_fasttimo(void);
struct rmxp_tao *
- tcp_gettaocache __P((struct inpcb *));
-void tcp_init __P((void));
-void tcp_input __P((struct mbuf *, int));
-void tcp_mss __P((struct tcpcb *, int));
-int tcp_mssopt __P((struct tcpcb *));
-void tcp_drop_syn_sent __P((struct inpcb *, int));
-void tcp_mtudisc __P((struct inpcb *, int));
+ tcp_gettaocache(struct inpcb *);
+void tcp_init(void);
+void tcp_input(struct mbuf *, int);
+void tcp_mss(struct tcpcb *, int);
+int tcp_mssopt(struct tcpcb *);
+void tcp_drop_syn_sent(struct inpcb *, int);
+void tcp_mtudisc(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_respond __P((struct tcpcb *, void *,
- struct tcphdr *, struct mbuf *, tcp_seq, tcp_seq, int));
+ tcp_newtcpcb(struct inpcb *);
+int tcp_output(struct tcpcb *);
+void tcp_quench(struct inpcb *, int);
+void tcp_respond(struct tcpcb *, void *,
+ struct tcphdr *, struct mbuf *, tcp_seq, tcp_seq, int);
struct rtentry *
- tcp_rtlookup __P((struct inpcb *));
-void tcp_setpersist __P((struct tcpcb *));
-void tcp_slowtimo __P((void));
+ tcp_rtlookup(struct inpcb *);
+void tcp_setpersist(struct tcpcb *);
+void tcp_slowtimo(void);
struct tcptemp *
- tcp_maketemplate __P((struct tcpcb *));
-void tcp_fillheaders __P((struct tcpcb *, void *, void *));
+ tcp_maketemplate(struct tcpcb *);
+void tcp_fillheaders(struct tcpcb *, void *, void *);
struct tcpcb *
- tcp_timers __P((struct tcpcb *, int));
-void tcp_trace __P((int, int, struct tcpcb *, void *, struct tcphdr *,
- int));
+ tcp_timers(struct tcpcb *, int);
+void tcp_trace(int, int, struct tcpcb *, void *, struct tcphdr *, int);
+int tcp_lock (struct socket *, int, int);
+int tcp_unlock (struct socket *, int, int);
+#ifdef _KERN_LOCKS_H_
+lck_mtx_t * tcp_getlock (struct socket *, int);
+#else
+void * tcp_getlock (struct socket *, int);
+#endif
+
extern struct pr_usrreqs tcp_usrreqs;
extern u_long tcp_sendspace;
extern u_long tcp_recvspace;
-tcp_seq tcp_new_isn __P((struct tcpcb *));
+tcp_seq tcp_new_isn(struct tcpcb *);
-#endif /* KERNEL */
-#endif /* __APPLE_API_PRIVATE */
+#endif /* KERNEL_RPIVATE */
#endif /* _NETINET_TCP_VAR_H_ */
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