mischief/openbsd-src
1
0
Fork 0
mirror of https://github.com/openbsd/src.git synced 2024-12-22 07:27:59 -08:00
Code
master
openbsd-src/sys/netinet/tcp_var.h
jsg 0f9e9ec23b remove prototypes with no matching function 
ok mpi@
2024-05-13 01:15:50 +00:00

806 lines
29 KiB
C
Raw Permalink Blame History

/* $OpenBSD: tcp_var.h,v 1.178 2024/05/13 01:15:53 jsg Exp $ */
/* $NetBSD: tcp_var.h,v 1.17 1996/02/13 23:44:24 christos Exp $ */
/*
* Copyright (c) 1982, 1986, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)tcp_var.h 8.3 (Berkeley) 4/10/94
*/
#ifndef _NETINET_TCP_VAR_H_
#define _NETINET_TCP_VAR_H_
#include <sys/timeout.h>
/*
* Kernel variables for tcp.
*/
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. */
int dups; /* number of dup(s)acks for this hole */
tcp_seq rxmit; /* next seq. no in hole to be retransmitted */
struct sackhole *next; /* next in list */
};
/*
* TCP sequence queue structures.
*/
TAILQ_HEAD(tcpqehead, tcpqent);
struct tcpqent {
TAILQ_ENTRY(tcpqent) tcpqe_q;
struct tcphdr *tcpqe_tcp;
struct mbuf *tcpqe_m; /* mbuf contains packet */
};
/*
* Tcp control block, one per tcp; fields:
*/
struct tcpcb {
struct tcpqehead t_segq; /* sequencing queue */
struct timeout t_timer[TCPT_NTIMERS]; /* tcp timers */
short t_state; /* state of this connection */
short t_rxtshift; /* log(2) of rexmt exp. backoff */
int t_rxtcur; /* current retransmit value */
short t_dupacks; /* consecutive dup acks recd */
u_short t_maxseg; /* maximum segment size */
char t_force; /* 1 if forcing out a byte */
u_int t_flags;
#define TF_ACKNOW 0x0001U /* ack peer immediately */
#define TF_NODELAY 0x0004U /* don't delay packets to coalesce */
#define TF_NOOPT 0x0008U /* don't use tcp options */
#define TF_SENTFIN 0x0010U /* have sent FIN */
#define TF_REQ_SCALE 0x0020U /* have/will request window scaling */
#define TF_RCVD_SCALE 0x0040U /* other side has requested scaling */
#define TF_REQ_TSTMP 0x0080U /* have/will request timestamps */
#define TF_RCVD_TSTMP 0x0100U /* a timestamp was received in SYN */
#define TF_SACK_PERMIT 0x0200U /* other side said I could SACK */
#define TF_SIGNATURE 0x0400U /* require TCP MD5 signature */
#ifdef TCP_ECN
#define TF_ECN_PERMIT 0x00008000U /* other side said I could ECN */
#define TF_RCVD_CE 0x00010000U /* send ECE in subsequent segs */
#define TF_SEND_CWR 0x00020000U /* send CWR in next seg */
#define TF_DISABLE_ECN 0x00040000U /* disable ECN for this connection */
#endif
#define TF_LASTIDLE 0x00100000U /* no outstanding ACK on last send */
#define TF_PMTUD_PEND 0x00400000U /* Path MTU Discovery pending */
#define TF_NEEDOUTPUT 0x00800000U /* call tcp_output after tcp_input */
#define TF_BLOCKOUTPUT 0x01000000U /* avert tcp_output during tcp_input */
#define TF_NOPUSH 0x02000000U /* don't push */
#define TF_TMR_REXMT 0x04000000U /* retransmit timer armed */
#define TF_TMR_PERSIST 0x08000000U /* retransmit persistence timer armed */
#define TF_TMR_KEEP 0x10000000U /* keep alive timer armed */
#define TF_TMR_2MSL 0x20000000U /* 2*msl quiet time timer armed */
#define TF_TMR_REAPER 0x40000000U /* delayed cleanup timer armed, dead */
#define TF_TMR_DELACK 0x80000000U /* delayed ack timer armed */
#define TF_TIMER TF_TMR_REXMT /* used to shift with TCPT values */
struct mbuf *t_template; /* skeletal packet for transmit */
struct inpcb *t_inpcb; /* back pointer to internet pcb */
/*
* The following fields are used as in the protocol specification.
* See RFC793, Dec. 1981, page 21.
*/
/* send sequence variables */
tcp_seq snd_una; /* send unacknowledged */
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 */
u_long snd_wnd; /* send window */
int sack_enable; /* enable SACK for this connection */
int snd_numholes; /* number of holes seen by sender */
struct sackhole *snd_holes; /* linked list of holes (sorted) */
tcp_seq snd_last; /* for use in fast recovery */
/* receive sequence variables */
u_long rcv_wnd; /* receive window */
tcp_seq rcv_nxt; /* receive next */
tcp_seq rcv_up; /* receive urgent pointer */
tcp_seq irs; /* initial receive sequence number */
tcp_seq rcv_lastsack; /* 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 */
/*
* Additional variables for this implementation.
*/
/* receive variables */
tcp_seq rcv_adv; /* advertised window */
/* retransmit variables */
tcp_seq snd_max; /* highest sequence number sent;
* used to recognize retransmits
*/
/* congestion control (for slow start, source quench, retransmit after loss) */
u_long snd_cwnd; /* congestion-controlled window */
u_long snd_ssthresh; /* snd_cwnd size threshold for
* for slow start exponential to
* linear switch
*/
/* auto-sizing variables */
uint64_t rfbuf_ts; /* recv buffer autoscaling time stamp */
u_int rfbuf_cnt; /* recv buffer autoscaling byte count */
u_short t_maxopd; /* mss plus options */
u_short t_peermss; /* peer's maximum segment size */
/*
* transmit timing stuff. See below for scale of srtt and rttvar.
* "Variance" is actually smoothed difference.
*/
uint64_t t_rcvtime; /* time last segment received */
uint64_t t_rcvacktime; /* time last ack received */
uint64_t t_sndtime; /* time last segment sent */
uint64_t t_sndacktime; /* time last ack sent */
uint64_t t_rtttime; /* time we started measuring rtt */
tcp_seq t_rtseq; /* sequence number being timed */
int t_srtt; /* smoothed round-trip time */
int t_rttvar; /* variance in round-trip time */
u_int t_rttmin; /* minimum rtt allowed */
u_long max_sndwnd; /* largest window peer has offered */
/* out-of-band data */
char t_oobflags; /* have some */
char t_iobc; /* input character */
#define TCPOOB_HAVEDATA 0x01
#define TCPOOB_HADDATA 0x02
short t_softerror; /* possible error not yet reported */
/* 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;
uint32_t ts_recent; /* timestamp echo data */
uint32_t ts_modulate; /* modulation on timestamp */
uint64_t ts_recent_age; /* when last updated */
tcp_seq last_ack_sent;
/* pointer for syn cache entries*/
LIST_HEAD(, syn_cache) t_sc; /* list of entries by this tcb */
/* Path-MTU Discovery Information */
u_int t_pmtud_mss_acked; /* MSS acked, lower bound for MTU */
u_int t_pmtud_mtu_sent; /* MTU used, upper bound for MTU */
tcp_seq t_pmtud_th_seq; /* TCP SEQ from ICMP payload */
u_int t_pmtud_nextmtu; /* Advertised Next-Hop MTU from ICMP */
u_short t_pmtud_ip_len; /* IP length from ICMP payload */
u_short t_pmtud_ip_hl; /* IP header length from ICMP payload */
int pf;
/* maintain a few stats per connection: */
u_int t_rcvoopack; /* out-of-order packets received */
u_int t_sndrexmitpack; /* retransmit packets sent */
u_int t_sndzerowin; /* zero-window updates sent */
};
#define intotcpcb(ip) ((struct tcpcb *)(ip)->inp_ppcb)
#define sototcpcb(so) (intotcpcb(sotoinpcb(so)))
#ifdef _KERNEL
/*
* Handy way of passing around TCP option info.
*/
struct tcp_opt_info {
int ts_present;
u_int32_t ts_val;
u_int32_t ts_ecr;
u_int16_t maxseg;
};
/*
* Data for the TCP compressed state engine.
*/
/*
* Locks used to protect global data and struct members:
* I immutable after creation
* N net lock
* S syn_cache_mtx tcp syn cache global mutex
*/
extern struct mutex syn_cache_mtx;
#define TCP_SYN_HASH_SIZE 293
#define TCP_SYN_BUCKET_SIZE 35
union syn_cache_sa {
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
};
struct syn_cache {
TAILQ_ENTRY(syn_cache) sc_bucketq; /* [S] link on bucket list */
struct refcnt sc_refcnt; /* ref count list and timer */
struct timeout sc_timer; /* rexmt timer */
struct route sc_route; /* [N] cached route */
long sc_win; /* [I] advertised window */
struct syn_cache_head *sc_buckethead; /* [S] our bucket index */
struct syn_cache_set *sc_set; /* [S] our syn cache set */
u_int64_t sc_timestamp; /* [N] timestamp from SYN */
u_int32_t sc_hash; /* [S] */
u_int32_t sc_modulate; /* [I] our timestamp modulator */
union syn_cache_sa sc_src; /* [I] */
union syn_cache_sa sc_dst; /* [I] */
tcp_seq sc_irs; /* [I] */
tcp_seq sc_iss; /* [I] */
u_int sc_rtableid; /* [I] */
u_int sc_rxtcur; /* [S] current rxt timeout */
u_int sc_rxttot; /* [S] total time spend on queues */
u_int sc_rxtshift; /* [S] for computing backoff */
u_int sc_dynflags; /* [S] flags accessed with mutex */
#define SCF_UNREACH 0x0001U /* we've had an unreach error */
#define SCF_DEAD 0x0002U /* this entry to be released */
u_short sc_fixflags; /* [I] set during initialization */
#define SCF_TIMESTAMP 0x0010U /* peer will do timestamps */
#define SCF_SACK_PERMIT 0x0020U /* permit sack */
#define SCF_ECN_PERMIT 0x0040U /* permit ecn */
#define SCF_SIGNATURE 0x0080U /* enforce tcp signatures */
struct mbuf *sc_ipopts; /* [N] IP options */
u_int16_t sc_peermaxseg; /* [I] */
u_int16_t sc_ourmaxseg; /* [I] */
u_int sc_request_r_scale : 4, /* [I] */
sc_requested_s_scale : 4; /* [I] */
struct tcpcb *sc_tp; /* [S] tcb for listening socket */
LIST_ENTRY(syn_cache) sc_tpq; /* [S] list of entries by same tp */
};
struct syn_cache_head {
TAILQ_HEAD(, syn_cache) sch_bucket; /* [S] bucket entries */
u_short sch_length; /* [S] # entries in bucket */
};
struct syn_cache_set {
struct syn_cache_head *scs_buckethead; /* [S] */
long scs_use; /* [S] */
int scs_size; /* [S] current size of hash table */
int scs_count; /* [S] */
u_int32_t scs_random[5]; /* [S] */
};
#endif /* _KERNEL */
/*
* 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 5 bits to the right of the binary point,
* and thus an "ALPHA" of 0.875. rttvar has 4 bits to the right of the
* binary point, and is smoothed with an ALPHA of 0.75.
*/
#define TCP_RTT_SHIFT 3 /* shift for srtt; 5 bits frac. */
#define TCP_RTTVAR_SHIFT 2 /* shift for rttvar; 4 bits */
#define TCP_RTT_BASE_SHIFT 2 /* remaining 2 bit shift */
#define TCP_RTT_MAX (1<<18) /* maximum rtt */
/*
* 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 macro assumes that the value of (1 << TCP_RTTVAR_SHIFT)
* is the same as the multiplier for rttvar.
*/
#define TCP_REXMTVAL(tp) \
((((tp)->t_srtt >> TCP_RTT_SHIFT) + (tp)->t_rttvar) \
>> TCP_RTT_BASE_SHIFT)
/*
* TCP statistics.
* Many of these should be kept per connection,
* but that's inconvenient at the moment.
*/
struct tcpstat {
u_int32_t tcps_connattempt; /* connections initiated */
u_int32_t tcps_accepts; /* connections accepted */
u_int32_t tcps_connects; /* connections established */
u_int32_t tcps_drops; /* connections dropped */
u_int32_t tcps_conndrops; /* embryonic connections dropped */
u_int32_t tcps_closed; /* conn. closed (includes drops) */
u_int32_t tcps_segstimed; /* segs where we tried to get rtt */
u_int32_t tcps_rttupdated; /* times we succeeded */
u_int32_t tcps_delack; /* delayed acks sent */
u_int32_t tcps_timeoutdrop; /* conn. dropped in rxmt timeout */
u_int32_t tcps_rexmttimeo; /* retransmit timeouts */
u_int32_t tcps_persisttimeo; /* persist timeouts */
u_int32_t tcps_persistdrop; /* connections dropped in persist */
u_int32_t tcps_keeptimeo; /* keepalive timeouts */
u_int32_t tcps_keepprobe; /* keepalive probes sent */
u_int32_t tcps_keepdrops; /* connections dropped in keepalive */
u_int32_t tcps_sndtotal; /* total packets sent */
u_int32_t tcps_sndpack; /* data packets sent */
u_int64_t tcps_sndbyte; /* data bytes sent */
u_int32_t tcps_sndrexmitpack; /* data packets retransmitted */
u_int64_t tcps_sndrexmitbyte; /* data bytes retransmitted */
u_int64_t tcps_sndrexmitfast; /* Fast retransmits */
u_int32_t tcps_sndacks; /* ack-only packets sent */
u_int32_t tcps_sndprobe; /* window probes sent */
u_int32_t tcps_sndurg; /* packets sent with URG only */
u_int32_t tcps_sndwinup; /* window update-only packets sent */
u_int32_t tcps_sndctrl; /* control (SYN|FIN|RST) packets sent */
u_int32_t tcps_rcvtotal; /* total packets received */
u_int32_t tcps_rcvpack; /* packets received in sequence */
u_int64_t tcps_rcvbyte; /* bytes received in sequence */
u_int32_t tcps_rcvbadsum; /* packets received with ccksum errs */
u_int32_t tcps_rcvbadoff; /* packets received with bad offset */
u_int32_t tcps_rcvmemdrop; /* packets dropped for lack of memory */
u_int32_t tcps_rcvnosec; /* packets dropped for lack of ipsec */
u_int32_t tcps_rcvshort; /* packets received too short */
u_int32_t tcps_rcvduppack; /* duplicate-only packets received */
u_int64_t tcps_rcvdupbyte; /* duplicate-only bytes received */
u_int32_t tcps_rcvpartduppack; /* packets with some duplicate data */
u_int64_t tcps_rcvpartdupbyte; /* dup. bytes in part-dup. packets */
u_int32_t tcps_rcvoopack; /* out-of-order packets received */
u_int64_t tcps_rcvoobyte; /* out-of-order bytes received */
u_int32_t tcps_rcvpackafterwin; /* packets with data after window */
u_int64_t tcps_rcvbyteafterwin; /* bytes rcvd after window */
u_int32_t tcps_rcvafterclose; /* packets rcvd after "close" */
u_int32_t tcps_rcvwinprobe; /* rcvd window probe packets */
u_int32_t tcps_rcvdupack; /* rcvd duplicate acks */
u_int32_t tcps_rcvacktoomuch; /* rcvd acks for unsent data */
u_int32_t tcps_rcvacktooold; /* rcvd acks for old data */
u_int32_t tcps_rcvackpack; /* rcvd ack packets */
u_int64_t tcps_rcvackbyte; /* bytes acked by rcvd acks */
u_int32_t tcps_rcvwinupd; /* rcvd window update packets */
u_int32_t tcps_pawsdrop; /* segments dropped due to PAWS */
u_int32_t tcps_predack; /* times hdr predict ok for acks */
u_int32_t tcps_preddat; /* times hdr predict ok for data pkts */
u_int32_t tcps_pcbhashmiss; /* input packets missing pcb hash */
u_int32_t tcps_noport; /* no socket on port */
u_int32_t tcps_badsyn; /* SYN packet with src==dst rcv'ed */
u_int32_t tcps_dropsyn; /* SYN packet dropped */
u_int32_t tcps_rcvbadsig; /* rcvd bad/missing TCP signatures */
u_int64_t tcps_rcvgoodsig; /* rcvd good TCP signatures */
u_int32_t tcps_inswcsum; /* input software-checksummed pkts */
u_int32_t tcps_outswcsum; /* output software-checksummed pkts */
/* ECN stats */
u_int32_t tcps_ecn_accepts; /* ecn connections accepted */
u_int32_t tcps_ecn_rcvece; /* # of rcvd ece */
u_int32_t tcps_ecn_rcvcwr; /* # of rcvd cwr */
u_int32_t tcps_ecn_rcvce; /* # of rcvd ce in ip header */
u_int32_t tcps_ecn_sndect; /* # of cwr sent */
u_int32_t tcps_ecn_sndece; /* # of ece sent */
u_int32_t tcps_ecn_sndcwr; /* # of cwr sent */
u_int32_t tcps_cwr_ecn; /* # of cwnd reduced by ecn */
u_int32_t tcps_cwr_frecovery; /* # of cwnd reduced by fastrecovery */
u_int32_t tcps_cwr_timeout; /* # of cwnd reduced by timeout */
/* These statistics deal with the SYN cache. */
u_int64_t tcps_sc_added; /* # of entries added */
u_int64_t tcps_sc_completed; /* # of connections completed */
u_int64_t tcps_sc_timed_out; /* # of entries timed out */
u_int64_t tcps_sc_overflowed; /* # dropped due to overflow */
u_int64_t tcps_sc_reset; /* # dropped due to RST */
u_int64_t tcps_sc_unreach; /* # dropped due to ICMP unreach */
u_int64_t tcps_sc_bucketoverflow;/* # dropped due to bucket overflow */
u_int64_t tcps_sc_aborted; /* # of entries aborted (no mem) */
u_int64_t tcps_sc_dupesyn; /* # of duplicate SYNs received */
u_int64_t tcps_sc_dropped; /* # of SYNs dropped (no route/mem) */
u_int64_t tcps_sc_collisions; /* # of hash collisions */
u_int64_t tcps_sc_retransmitted;/* # of retransmissions */
u_int64_t tcps_sc_seedrandom; /* # of syn cache seeds with random */
u_int64_t tcps_sc_hash_size; /* hash buckets in current syn cache */
u_int64_t tcps_sc_entry_count; /* # of entries in current syn cache */
u_int64_t tcps_sc_entry_limit; /* limit of syn cache entries */
u_int64_t tcps_sc_bucket_maxlen;/* maximum # of entries in any bucket */
u_int64_t tcps_sc_bucket_limit; /* limit of syn cache bucket list */
int64_t tcps_sc_uses_left; /* use counter of current syn cache */
u_int64_t tcps_conndrained; /* # of connections drained */
u_int64_t tcps_sack_recovery_episode; /* SACK recovery episodes */
u_int64_t tcps_sack_rexmits; /* SACK rexmit segments */
u_int64_t tcps_sack_rexmit_bytes; /* SACK rexmit bytes */
u_int64_t tcps_sack_rcv_opts; /* SACK options received */
u_int64_t tcps_sack_snd_opts; /* SACK options sent */
u_int64_t tcps_sack_drop_opts; /* SACK options dropped */
u_int32_t tcps_outswtso; /* output tso chopped in software */
u_int32_t tcps_outhwtso; /* output tso processed by hardware */
u_int32_t tcps_outpkttso; /* packets generated by tso */
u_int32_t tcps_outbadtso; /* output tso failed, packet dropped */
u_int32_t tcps_inswlro; /* input lro on pseudo device */
u_int32_t tcps_inhwlro; /* input lro from hardware */
u_int32_t tcps_inpktlro; /* packets coalesced by hardware lro */
u_int32_t tcps_inbadlro; /* input bad lro packets */
};
/*
* Names for TCP sysctl objects.
*/
#define TCPCTL_RFC1323 1 /* enable RFC1323 timestamps/scaling */
#define TCPCTL_KEEPINITTIME 2 /* TCPT_KEEP value */
#define TCPCTL_KEEPIDLE 3 /* allow tcp_keepidle to be changed */
#define TCPCTL_KEEPINTVL 4 /* allow tcp_keepintvl to be changed */
#define TCPCTL_SLOWHZ 5 /* return kernel idea of PR_SLOWHZ */
#define TCPCTL_BADDYNAMIC 6 /* return bad dynamic port bitmap */
#define TCPCTL_RECVSPACE 7 /* receive buffer space */
#define TCPCTL_SENDSPACE 8 /* send buffer space */
#define TCPCTL_IDENT 9 /* get connection owner */
#define TCPCTL_SACK 10 /* selective acknowledgement, rfc 2018 */
#define TCPCTL_MSSDFLT 11 /* Default maximum segment size */
#define TCPCTL_RSTPPSLIMIT 12 /* RST pps limit */
#define TCPCTL_ACK_ON_PUSH 13 /* ACK immediately on PUSH */
#define TCPCTL_ECN 14 /* RFC3168 ECN */
#define TCPCTL_SYN_CACHE_LIMIT 15 /* max size of comp. state engine */
#define TCPCTL_SYN_BUCKET_LIMIT 16 /* max size of hash bucket */
#define TCPCTL_RFC3390 17 /* enable/disable RFC3390 increased cwnd */
#define TCPCTL_REASS_LIMIT 18 /* max entries for tcp reass queues */
#define TCPCTL_DROP 19 /* drop tcp connection */
#define TCPCTL_SACKHOLE_LIMIT 20 /* max entries for tcp sack queues */
#define TCPCTL_STATS 21 /* TCP statistics */
#define TCPCTL_ALWAYS_KEEPALIVE 22 /* assume SO_KEEPALIVE is always set */
#define TCPCTL_SYN_USE_LIMIT 23 /* number of uses before reseeding hash */
#define TCPCTL_ROOTONLY 24 /* return root only port bitmap */
#define TCPCTL_SYN_HASH_SIZE 25 /* number of buckets in the hash */
#define TCPCTL_TSO 26 /* enable TCP segmentation offload */
#define TCPCTL_MAXID 27
#define TCPCTL_NAMES { \
{ 0, 0 }, \
{ "rfc1323", CTLTYPE_INT }, \
{ "keepinittime", CTLTYPE_INT }, \
{ "keepidle", CTLTYPE_INT }, \
{ "keepintvl", CTLTYPE_INT }, \
{ NULL, 0 }, \
{ "baddynamic", CTLTYPE_STRUCT }, \
{ NULL, 0 }, \
{ NULL, 0 }, \
{ "ident", CTLTYPE_STRUCT }, \
{ "sack", CTLTYPE_INT }, \
{ "mssdflt", CTLTYPE_INT }, \
{ "rstppslimit", CTLTYPE_INT }, \
{ "ackonpush", CTLTYPE_INT }, \
{ "ecn", CTLTYPE_INT }, \
{ "syncachelimit", CTLTYPE_INT }, \
{ "synbucketlimit", CTLTYPE_INT }, \
{ "rfc3390", CTLTYPE_INT }, \
{ "reasslimit", CTLTYPE_INT }, \
{ "drop", CTLTYPE_STRUCT }, \
{ "sackholelimit", CTLTYPE_INT }, \
{ "stats", CTLTYPE_STRUCT }, \
{ "always_keepalive", CTLTYPE_INT }, \
{ "synuselimit", CTLTYPE_INT }, \
{ "rootonly", CTLTYPE_STRUCT }, \
{ "synhashsize", CTLTYPE_INT }, \
{ "tso", CTLTYPE_INT }, \
}
struct tcp_ident_mapping {
struct sockaddr_storage faddr, laddr;
int euid, ruid;
u_int rdomain;
};
#ifdef _KERNEL
#include <sys/percpu.h>
#include <sys/stat.h>
enum tcpstat_counters {
tcps_connattempt,
tcps_accepts,
tcps_connects,
tcps_drops,
tcps_conndrops,
tcps_closed,
tcps_segstimed,
tcps_rttupdated,
tcps_delack,
tcps_timeoutdrop,
tcps_rexmttimeo,
tcps_persisttimeo,
tcps_persistdrop,
tcps_keeptimeo,
tcps_keepprobe,
tcps_keepdrops,
tcps_sndtotal,
tcps_sndpack,
tcps_sndbyte,
tcps_sndrexmitpack,
tcps_sndrexmitbyte,
tcps_sndrexmitfast,
tcps_sndacks,
tcps_sndprobe,
tcps_sndurg,
tcps_sndwinup,
tcps_sndctrl,
tcps_rcvtotal,
tcps_rcvpack,
tcps_rcvbyte,
tcps_rcvbadsum,
tcps_rcvbadoff,
tcps_rcvmemdrop,
tcps_rcvnosec,
tcps_rcvshort,
tcps_rcvduppack,
tcps_rcvdupbyte,
tcps_rcvpartduppack,
tcps_rcvpartdupbyte,
tcps_rcvoopack,
tcps_rcvoobyte,
tcps_rcvpackafterwin,
tcps_rcvbyteafterwin,
tcps_rcvafterclose,
tcps_rcvwinprobe,
tcps_rcvdupack,
tcps_rcvacktoomuch,
tcps_rcvacktooold,
tcps_rcvackpack,
tcps_rcvackbyte,
tcps_rcvwinupd,
tcps_pawsdrop,
tcps_predack,
tcps_preddat,
tcps_pcbhashmiss,
tcps_noport,
tcps_badsyn,
tcps_dropsyn,
tcps_rcvbadsig,
tcps_rcvgoodsig,
tcps_inswcsum,
tcps_outswcsum,
tcps_ecn_accepts,
tcps_ecn_rcvece,
tcps_ecn_rcvcwr,
tcps_ecn_rcvce,
tcps_ecn_sndect,
tcps_ecn_sndece,
tcps_ecn_sndcwr,
tcps_cwr_ecn,
tcps_cwr_frecovery,
tcps_cwr_timeout,
tcps_sc_added,
tcps_sc_completed,
tcps_sc_timed_out,
tcps_sc_overflowed,
tcps_sc_reset,
tcps_sc_unreach,
tcps_sc_bucketoverflow,
tcps_sc_aborted,
tcps_sc_dupesyn,
tcps_sc_dropped,
tcps_sc_collisions,
tcps_sc_retransmitted,
tcps_sc_seedrandom,
tcps_sc_hash_size,
tcps_sc_entry_count,
tcps_sc_entry_limit,
tcps_sc_bucket_maxlen,
tcps_sc_bucket_limit,
tcps_sc_uses_left,
tcps_conndrained,
tcps_sack_recovery_episode,
tcps_sack_rexmits,
tcps_sack_rexmit_bytes,
tcps_sack_rcv_opts,
tcps_sack_snd_opts,
tcps_sack_drop_opts,
tcps_outswtso,
tcps_outhwtso,
tcps_outpkttso,
tcps_outbadtso,
tcps_inswlro,
tcps_inhwlro,
tcps_inpktlro,
tcps_inbadlro,
tcps_ncounters,
};
extern struct cpumem *tcpcounters;
static inline void
tcpstat_inc(enum tcpstat_counters c)
{
counters_inc(tcpcounters, c);
}
static inline void
tcpstat_add(enum tcpstat_counters c, uint64_t v)
{
counters_add(tcpcounters, c, v);
}
static inline void
tcpstat_pkt(enum tcpstat_counters pcounter, enum tcpstat_counters bcounter,
uint64_t v)
{
counters_pkt(tcpcounters, pcounter, bcounter, v);
}
extern uint64_t tcp_starttime;
static inline uint64_t
tcp_now(void)
{
/* TCP time ticks in 63 bit milliseconds with 63 bit random offset. */
return tcp_starttime + (getnsecruntime() / 1000000ULL);
}
#define TCP_TIME(_sec) ((_sec) * 1000) /* tcp_now() is in milliseconds */
extern struct mutex tcp_timer_mtx;
extern const struct pr_usrreqs tcp_usrreqs;
#ifdef INET6
extern const struct pr_usrreqs tcp6_usrreqs;
#endif
extern struct pool tcpcb_pool;
extern struct inpcbtable tcbtable, tcb6table; /* queue of active tcpcb's */
extern int tcp_do_rfc1323; /* enabled/disabled? */
extern int tcptv_keep_init; /* [N] time to keep alive initial SYN packet */
extern int tcp_mssdflt; /* default maximum segment size */
extern int tcp_rst_ppslim; /* maximum outgoing RST packet per second */
extern int tcp_ack_on_push; /* ACK immediately on PUSH */
extern int tcp_do_sack; /* SACK enabled/disabled */
extern struct pool sackhl_pool;
extern int tcp_sackhole_limit; /* max entries for tcp sack queues */
extern int tcp_do_ecn; /* RFC3168 ECN enabled/disabled? */
extern int tcp_do_rfc3390; /* RFC3390 Increasing TCP's Initial Window */
extern int tcp_do_tso; /* enable TSO for TCP output packets */
extern struct pool tcpqe_pool;
extern int tcp_reass_limit; /* max entries for tcp reass queues */
extern int tcp_syn_hash_size; /* adjustable size of the hash array */
extern int tcp_syn_cache_limit; /* max entries for compressed state engine */
extern int tcp_syn_bucket_limit;/* max entries per hash bucket */
extern int tcp_syn_use_limit; /* number of uses before reseeding hash */
extern struct syn_cache_set tcp_syn_cache[];
extern int tcp_syn_cache_active; /* active syn cache, may be 0 or 1 */
struct tdb;
void tcp_canceltimers(struct tcpcb *);
struct tcpcb *
tcp_close(struct tcpcb *);
int tcp_freeq(struct tcpcb *);
#ifdef INET6
void tcp6_ctlinput(int, struct sockaddr *, u_int, void *);
#endif
void tcp_ctlinput(int, struct sockaddr *, u_int, void *);
int tcp_ctloutput(int, struct socket *, int, int, struct mbuf *);
struct tcpcb *
tcp_dodisconnect(struct tcpcb *);
struct tcpcb *
tcp_drop(struct tcpcb *, int);
int tcp_dooptions(struct tcpcb *, u_char *, int, struct tcphdr *,
struct mbuf *, int, struct tcp_opt_info *, u_int, uint64_t);
void tcp_init(void);
int tcp_input(struct mbuf **, int *, int, int);
int tcp_mss(struct tcpcb *, int);
void tcp_mss_update(struct tcpcb *);
u_int tcp_hdrsz(struct tcpcb *);
void tcp_mtudisc(struct inpcb *, int);
void tcp_mtudisc_increase(struct inpcb *, int);
#ifdef INET6
void tcp6_mtudisc_callback(struct sockaddr_in6 *, u_int);
#endif
struct tcpcb *
tcp_newtcpcb(struct inpcb *, int);
void tcp_notify(struct inpcb *, int);
int tcp_output(struct tcpcb *);
int tcp_chopper(struct mbuf *, struct mbuf_list *, struct ifnet *, u_int);
int tcp_if_output_tso(struct ifnet *, struct mbuf **, struct sockaddr *,
struct rtentry *, uint32_t, u_int);
void tcp_pulloutofband(struct socket *, u_int, struct mbuf *, int);
int tcp_reass(struct tcpcb *, struct tcphdr *, struct mbuf *, int *);
void tcp_rscale(struct tcpcb *, u_long);
void tcp_respond(struct tcpcb *, caddr_t, struct tcphdr *, tcp_seq,
tcp_seq, int, u_int, uint64_t);
void tcp_setpersist(struct tcpcb *);
void tcp_update_sndspace(struct tcpcb *);
void tcp_update_rcvspace(struct tcpcb *);
void tcp_slowtimo(void);
struct mbuf *
tcp_template(struct tcpcb *);
#ifndef SMALL_KERNEL
void tcp_trace(short, short, struct tcpcb *, struct tcpcb *, caddr_t,
int, int);
#endif
struct tcpcb *
tcp_usrclosed(struct tcpcb *);
int tcp_sysctl(int *, u_int, void *, size_t *, void *, size_t);
int tcp_attach(struct socket *, int, int);
int tcp_detach(struct socket *);
int tcp_bind(struct socket *, struct mbuf *, struct proc *);
int tcp_listen(struct socket *);
int tcp_connect(struct socket *, struct mbuf *);
int tcp_accept(struct socket *, struct mbuf *);
int tcp_disconnect(struct socket *);
int tcp_shutdown(struct socket *);
void tcp_rcvd(struct socket *);
int tcp_send(struct socket *, struct mbuf *, struct mbuf *,
struct mbuf *);
void tcp_abort(struct socket *);
int tcp_sockaddr(struct socket *, struct mbuf *);
int tcp_peeraddr(struct socket *, struct mbuf *);
int tcp_sense(struct socket *, struct stat *);
int tcp_rcvoob(struct socket *, struct mbuf *, int);
int tcp_sendoob(struct socket *, struct mbuf *, struct mbuf *,
struct mbuf *);
void tcp_xmit_timer(struct tcpcb *, int32_t);
void tcp_sack_option(struct tcpcb *,struct tcphdr *,u_char *,int);
void tcp_update_sack_list(struct tcpcb *tp, tcp_seq, tcp_seq);
void tcp_del_sackholes(struct tcpcb *, struct tcphdr *);
void tcp_clean_sackreport(struct tcpcb *tp);
void tcp_sack_adjust(struct tcpcb *tp);
struct sackhole *
tcp_sack_output(struct tcpcb *tp);
#ifdef DEBUG
void tcp_print_holes(struct tcpcb *tp);
#endif
u_long tcp_seq_subtract(u_long, u_long );
#ifdef TCP_SIGNATURE
int tcp_signature_apply(caddr_t, caddr_t, unsigned int);
int tcp_signature(struct tdb *, int, struct mbuf *, struct tcphdr *,
int, int, char *);
#endif /* TCP_SIGNATURE */
void tcp_set_iss_tsm(struct tcpcb *);
void syn_cache_unreach(const struct sockaddr *, const struct sockaddr *,
struct tcphdr *, u_int);
void syn_cache_init(void);
void syn_cache_cleanup(struct tcpcb *);
#ifdef SMALL_KERNEL
static inline void
tcp_trace(short act, short ostate, struct tcpcb *tp, struct tcpcb *otp,
caddr_t headers, int req, int len)
{
}
#endif
#endif /* _KERNEL */
#endif /* _NETINET_TCP_VAR_H_ */
View Git Blame Copy Permalink