2.11BSD/sys/netns/spp_var.h
/*
* Copyright (c) 1984, 1985, 1986, 1987 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that this notice is preserved and that due credit is given
* to the University of California at Berkeley. The name of the University
* may not be used to endorse or promote products derived from this
* software without specific prior written permission. This software
* is provided ``as is'' without express or implied warranty.
*
* @(#)spp_var.h 7.4.1 (2.11BSD GTE) 12/31/93
*/
/*
* Sp control block, one per connection
*/
struct sppcb {
struct spidp_q s_q; /* queue for out-of-order receipt */
struct nspcb *s_nspcb; /* backpointer to internet pcb */
u_char s_state;
u_char s_flags;
#define SF_ACKNOW 0x01 /* Ack peer immediately */
#define SF_DELACK 0x02 /* Ack, but try to delay it */
#define SF_HI 0x04 /* Show headers on input */
#define SF_HO 0x08 /* Show headers on output */
#define SF_PI 0x10 /* Packet (datagram) interface */
#define SF_WIN 0x20 /* Window info changed */
#define SF_RXT 0x40 /* Rxt info changed */
#define SF_RVD 0x80 /* Calling from read usrreq routine */
u_short s_mtu; /* Max packet size for this stream */
/* use sequence fields in headers to store sequence numbers for this
connection */
struct idp *s_idp;
struct sphdr s_shdr; /* prototype header to transmit */
#define s_cc s_shdr.sp_cc /* connection control (for EM bit) */
#define s_dt s_shdr.sp_dt /* datastream type */
#define s_sid s_shdr.sp_sid /* source connection identifier */
#define s_did s_shdr.sp_did /* destination connection identifier */
#define s_seq s_shdr.sp_seq /* sequence number */
#define s_ack s_shdr.sp_ack /* acknowledge number */
#define s_alo s_shdr.sp_alo /* allocation number */
#define s_dport s_idp->idp_dna.x_port /* where we are sending */
struct sphdr s_rhdr; /* last received header (in effect!)*/
u_short s_rack; /* their acknowledge number */
u_short s_ralo; /* their allocation number */
u_short s_smax; /* highest packet # we have sent */
u_short s_snxt; /* which packet to send next */
/* congestion control */
#define CUNIT 1024 /* scaling for ... */
int s_cwnd; /* Congestion-controlled window */
/* in packets * CUNIT */
short s_swnd; /* == tcp snd_wnd, in packets */
short s_smxw; /* == tcp max_sndwnd */
/* difference of two spp_seq's can be
no bigger than a short */
u_short s_swl1; /* == tcp snd_wl1 */
u_short s_swl2; /* == tcp snd_wl2 */
int s_cwmx; /* max allowable cwnd */
int s_ssthresh; /* s_cwnd size threshhold for
* slow start exponential-to-
* linear switch */
/* transmit timing stuff
* srtt and rttvar are stored as fixed point, for convenience in smoothing.
* srtt has 3 bits to the right of the binary point, rttvar has 2.
*/
short s_idle; /* time idle */
short s_timer[SPPT_NTIMERS]; /* timers */
short s_rxtshift; /* log(2) of rexmt exp. backoff */
short s_rxtcur; /* current retransmit value */
u_short s_rtseq; /* packet being timed */
short s_rtt; /* timer for round trips */
short s_srtt; /* averaged timer */
short s_rttvar; /* variance in round trip time */
char s_force; /* which timer expired */
char s_dupacks; /* counter to intuit xmt loss */
/* out of band data */
char s_oobflags;
#define SF_SOOB 0x08 /* sending out of band data */
#define SF_IOOB 0x10 /* receiving out of band data */
char s_iobc; /* input characters */
/* debug stuff */
u_short s_want; /* Last candidate for sending */
char s_outx; /* exit taken from spp_output */
char s_inx; /* exit taken from spp_input */
};
#define nstosppcb(np) ((struct sppcb *)(np)->nsp_pcb)
#define sotosppcb(so) (nstosppcb(sotonspcb(so)))
struct sppstat {
long spps_connattempt; /* connections initiated */
long spps_accepts; /* connections accepted */
long spps_connects; /* connections established */
long spps_drops; /* connections dropped */
long spps_conndrops; /* embryonic connections dropped */
long spps_closed; /* conn. closed (includes drops) */
long spps_segstimed; /* segs where we tried to get rtt */
long spps_rttupdated; /* times we succeeded */
long spps_delack; /* delayed acks sent */
long spps_timeoutdrop; /* conn. dropped in rxmt timeout */
long spps_rexmttimeo; /* retransmit timeouts */
long spps_persisttimeo; /* persist timeouts */
long spps_keeptimeo; /* keepalive timeouts */
long spps_keepprobe; /* keepalive probes sent */
long spps_keepdrops; /* connections dropped in keepalive */
long spps_sndtotal; /* total packets sent */
long spps_sndpack; /* data packets sent */
long spps_sndbyte; /* data bytes sent */
long spps_sndrexmitpack; /* data packets retransmitted */
long spps_sndrexmitbyte; /* data bytes retransmitted */
long spps_sndacks; /* ack-only packets sent */
long spps_sndprobe; /* window probes sent */
long spps_sndurg; /* packets sent with URG only */
long spps_sndwinup; /* window update-only packets sent */
long spps_sndctrl; /* control (SYN|FIN|RST) packets sent */
long spps_sndvoid; /* couldn't find requested packet*/
long spps_rcvtotal; /* total packets received */
long spps_rcvpack; /* packets received in sequence */
long spps_rcvbyte; /* bytes received in sequence */
long spps_rcvbadsum; /* packets received with ccksum errs */
long spps_rcvbadoff; /* packets received with bad offset */
long spps_rcvshort; /* packets received too short */
long spps_rcvduppack; /* duplicate-only packets received */
long spps_rcvdupbyte; /* duplicate-only bytes received */
long spps_rcvpartduppack; /* packets with some duplicate data */
long spps_rcvpartdupbyte; /* dup. bytes in part-dup. packets */
long spps_rcvoopack; /* out-of-order packets received */
long spps_rcvoobyte; /* out-of-order bytes received */
long spps_rcvpackafterwin; /* packets with data after window */
long spps_rcvbyteafterwin; /* bytes rcvd after window */
long spps_rcvafterclose; /* packets rcvd after "close" */
long spps_rcvwinprobe; /* rcvd window probe packets */
long spps_rcvdupack; /* rcvd duplicate acks */
long spps_rcvacktoomuch; /* rcvd acks for unsent data */
long spps_rcvackpack; /* rcvd ack packets */
long spps_rcvackbyte; /* bytes acked by rcvd acks */
long spps_rcvwinupd; /* rcvd window update packets */
};
struct spp_istat {
short hdrops;
short badsum;
short badlen;
short slotim;
short fastim;
short nonucn;
short noconn;
short notme;
short wrncon;
short bdreas;
short gonawy;
short notyet;
short lstdup;
struct sppstat newstats;
};
#ifdef SUPERVISOR
struct spp_istat spp_istat;
/* Following was struct sppstat sppstat; */
#ifndef sppstat
#define sppstat spp_istat.newstats
#endif
u_short spp_iss;
extern struct sppcb *spp_close(), *spp_disconnect(),
*spp_usrclosed(), *spp_timers(), *spp_drop();
#endif
#define SPP_ISSINCR 128
/*
* SPP sequence numbers are 16 bit integers operated
* on with modular arithmetic. These macros can be
* used to compare such integers.
*/
#ifdef sun
short xnsCbug;
#define SSEQ_LT(a,b) ((xnsCbug = (short)((a)-(b))) < 0)
#define SSEQ_LEQ(a,b) ((xnsCbug = (short)((a)-(b))) <= 0)
#define SSEQ_GT(a,b) ((xnsCbug = (short)((a)-(b))) > 0)
#define SSEQ_GEQ(a,b) ((xnsCbug = (short)((a)-(b))) >= 0)
#else
#define SSEQ_LT(a,b) (((short)((a)-(b))) < 0)
#define SSEQ_LEQ(a,b) (((short)((a)-(b))) <= 0)
#define SSEQ_GT(a,b) (((short)((a)-(b))) > 0)
#define SSEQ_GEQ(a,b) (((short)((a)-(b))) >= 0)
#endif