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, 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. 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.
 *
 *      from: @(#)spp_var.h     7.7 (Berkeley) 6/28/90
 *      $Id$
 */

/*
 * 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 */
        u_short s_flags2;               /* more flags for testing */
#define SF_NEWCALL      0x100           /* for new_recvmsg */
#define SO_NEWCALL      10              /* for new_recvmsg */
};

#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 KERNEL
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