/*
* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
*
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_START@
*
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
+ * 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
+ * compliance with the License. The rights granted to you under the
+ * License may not be used to create, or enable the creation or
+ * redistribution of, unlawful or unlicensed copies of an Apple operating
+ * system, or to circumvent, violate, or enable the circumvention or
+ * violation of, any terms of an Apple operating system software license
+ * agreement.
+ *
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this
+ * file.
+ *
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
+ *
+ * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
*/
/*
* Copyright (c) 1982, 1986, 1993, 1994, 1995
#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
+struct sackblk {
+ tcp_seq start; /* start seq no. of sack block */
+ tcp_seq end; /* end seq no. */
+};
+
+struct sackhole {
+ tcp_seq start; /* start seq no. of hole */
+ tcp_seq end; /* end seq no. */
+ tcp_seq rxmit; /* next seq. no in hole to be retransmitted */
+ TAILQ_ENTRY(sackhole) scblink; /* scoreboard linkage */
+};
+
+struct sackhint {
+ struct sackhole *nexthole;
+ int sack_bytes_rexmit;
+};
+
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 */
-#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.
#define TF_RXWIN0SENT 0x40000 /* sent a receiver win 0 in response */
#define TF_SLOWLINK 0x80000 /* route is a on a modem speed link */
+
+#define TF_LASTIDLE 0x100000 /* connection was previously idle */
+#define TF_FASTRECOVERY 0x200000 /* in NewReno Fast Recovery */
+#define TF_WASFRECOVERY 0x400000 /* was in NewReno Fast Recovery */
+#define TF_SIGNATURE 0x800000 /* require MD5 digests (RFC2385) */
+#define TF_MAXSEGSNT 0x1000000 /* last segment sent was a full segment */
+
int t_force; /* 1 if forcing out a byte */
tcp_seq snd_una; /* send unacknowledged */
/* 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 */
+
+ tcp_seq snd_recover_prev; /* snd_recover prior to retransmit */
+ u_char snd_limited; /* segments limited transmitted */
+/* anti DoS counters */
+ u_long rcv_second; /* start of interval second */
+/* SACK related state */
+ int sack_enable; /* enable SACK for this connection */
+ int snd_numholes; /* number of holes seen by sender */
+
+ TAILQ_HEAD(sackhole_head, sackhole) snd_holes;
+ /* SACK scoreboard (sorted) */
+ tcp_seq snd_fack; /* last seq number(+1) sack'd by rcv'r*/
+ int rcv_numsacks; /* # distinct sack blks present */
+ struct sackblk sackblks[MAX_SACK_BLKS]; /* seq nos. of sack blocks */
+ tcp_seq sack_newdata; /* New data xmitted in this recovery
+ episode starts at this seq number */
+ struct sackhint sackhint; /* SACK scoreboard hint */
+ int t_rttlow; /* smallest observerved RTT */
};
+#define IN_FASTRECOVERY(tp) (tp->t_flags & TF_FASTRECOVERY)
+#define ENTER_FASTRECOVERY(tp) tp->t_flags |= TF_FASTRECOVERY
+#define EXIT_FASTRECOVERY(tp) tp->t_flags &= ~TF_FASTRECOVERY
+
+
/*
* Structure to hold TCP options that are only used during segment
* processing (in tcp_input), but not held in the tcpcb.
* to tcp_dooptions.
*/
struct tcpopt {
- u_long to_flag; /* which options are present */
+ u_long to_flags; /* 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 */
+#define TOF_MSS 0x0010
+#define TOF_SCALE 0x0020
+#define TOF_SIGNATURE 0x0040 /* signature option present */
+#define TOF_SIGLEN 0x0080 /* signature length valid (RFC2385) */
+#define TOF_SACK 0x0100 /* Peer sent SACK option */
+ u_long to_tsval;
+ u_long to_tsecr;
+ u_int16_t to_mss;
+ u_int8_t to_requested_s_scale;
+ u_int8_t to_nsacks; /* number of SACK blocks */
+ u_char *to_sacks; /* pointer to the first SACK blocks */
};
/*
#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
+/*
+ * 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 */
+
+ int t_timer[TCPT_NTIMERS]; /* tcp timers */
+
+ struct inpcb *t_inpcb; /* back pointer to internet pcb */
+ int t_state; /* state of this connection */
+ u_int t_flags;
+#define TF_ACKNOW 0x00001 /* ack peer immediately */
+#define TF_DELACK 0x00002 /* ack, but try to delay it */
+#define TF_NODELAY 0x00004 /* don't delay packets to coalesce */
+#define TF_NOOPT 0x00008 /* don't use tcp options */
+#define TF_SENTFIN 0x00010 /* have sent FIN */
+#define TF_REQ_SCALE 0x00020 /* have/will request window scaling */
+#define TF_RCVD_SCALE 0x00040 /* other side has requested scaling */
+#define TF_REQ_TSTMP 0x00080 /* have/will request timestamps */
+#define TF_RCVD_TSTMP 0x00100 /* a timestamp was received in SYN */
+#define TF_SACK_PERMIT 0x00200 /* other side said I could SACK */
+#define TF_NEEDSYN 0x00400 /* send SYN (implicit state) */
+#define TF_NEEDFIN 0x00800 /* send FIN (implicit state) */
+#define TF_NOPUSH 0x01000 /* don't push */
+#define TF_REQ_CC 0x02000 /* have/will request CC */
+#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 */
+ tcp_seq snd_max; /* highest sequence number sent;
+ * used to recognize retransmits
+ */
+ tcp_seq snd_nxt; /* send next */
+ tcp_seq snd_up; /* send urgent pointer */
+
+ tcp_seq snd_wl1; /* window update seg seq number */
+ tcp_seq snd_wl2; /* window update seg ack number */
+ tcp_seq iss; /* initial send sequence number */
+ tcp_seq irs; /* initial receive sequence number */
+
+ tcp_seq rcv_nxt; /* receive next */
+ tcp_seq rcv_adv; /* advertised window */
+ u_long rcv_wnd; /* receive window */
+ tcp_seq rcv_up; /* receive urgent pointer */
+
+ u_long snd_wnd; /* send window */
+ u_long snd_cwnd; /* congestion-controlled window */
+ u_long snd_ssthresh; /* snd_cwnd size threshold for
+ * for slow start exponential to
+ * linear switch
+ */
+ u_int t_maxopd; /* mss plus options */
+
+ 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 */
+
+ 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 */
+
+ int t_rxtshift; /* log(2) of rexmt exp. backoff */
+ u_int t_rttmin; /* minimum rtt allowed */
+ u_long t_rttupdated; /* number of times rtt sampled */
+ u_long max_sndwnd; /* largest window peer has offered */
+
+ int t_softerror; /* possible error not yet reported */
+/* out-of-band data */
+ char t_oobflags; /* have some */
+ char t_iobc; /* input character */
+#define TCPOOB_HAVEDATA 0x01
+#define TCPOOB_HADDATA 0x02
+/* RFC 1323 variables */
+ u_char snd_scale; /* window scaling for send window */
+ u_char rcv_scale; /* window scaling for recv window */
+ u_char request_r_scale; /* pending window scaling */
+ u_char requested_s_scale;
+ u_long ts_recent; /* timestamp echo data */
+
+ u_long ts_recent_age; /* when last updated */
+ tcp_seq last_ack_sent;
+/* 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 */
+};
+
/*
* TCP statistics.
* Many of these should be kept per connection,
u_long tcps_badsyn; /* bogus SYN, e.g. premature ACK */
u_long tcps_mturesent; /* resends due to MTU discovery */
u_long tcps_listendrop; /* listen queue overflows */
+
+ /* SACK related stats */
+ u_long tcps_sack_recovery_episode; /* SACK recovery episodes */
+ u_long tcps_sack_rexmits; /* SACK rexmit segments */
+ u_long tcps_sack_rexmit_bytes; /* SACK rexmit bytes */
+ u_long tcps_sack_rcv_blocks; /* SACK blocks (options) received */
+ u_long tcps_sack_send_blocks; /* SACK blocks (options) sent */
+ u_long tcps_sack_sboverflow; /* SACK sendblock overflow */
+
};
-#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;
- struct tcpcb xt_tp;
+#endif
+#ifdef KERNEL_PRIVATE
+ struct otcpcb xt_tp;
+#else
+ struct tcpcb xt_tp;
+#endif
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__ */
+extern int tcp_do_sack; /* SACK enabled/disabled */
-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);
+
+void tcp_update_sack_list(struct tcpcb *tp, tcp_seq rcv_laststart, tcp_seq rcv_lastend);
+void tcp_clean_sackreport(struct tcpcb *tp);
+void tcp_sack_adjust(struct tcpcb *tp);
+struct sackhole *tcp_sack_output(struct tcpcb *tp, int *sack_bytes_rexmt);
+void tcp_sack_partialack(struct tcpcb *, struct tcphdr *);
+void tcp_free_sackholes(struct tcpcb *tp);
+
+
+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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