FreeBSD/Linux Kernel Cross Reference
sys/netns/spp_var.h

     /*      $NetBSD: spp_var.h,v 1.13 2003/08/07 16:33:48 agc Exp $ */
     
     /*
      * Copyright (c) 1984, 1985, 1986, 1987, 1993
      *      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.
     *
     *      @(#)spp_var.h   8.1 (Berkeley) 6/10/93
     */
    
    /*
     * Sp control block, one per connection
     */
    struct sppcb {
            struct  siqhead 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
   extern  struct spp_istat spp_istat;
   
   /* Following was struct sppstat sppstat; */
   #ifndef sppstat
   #define sppstat spp_istat.newstats
   #endif
   
   extern  u_short spp_iss;
   struct sppcb;
   struct spidp;
   
   /* spp_debug.c */
   void spp_trace __P((int, u_int, struct sppcb *, struct spidp *, int));
   
   /* spp_usrreq.c */
   void spp_init __P((void));
   void spp_input __P((struct mbuf *, ...));
   int spp_reass __P((struct sppcb *, struct spidp *, struct mbuf *));
   void *spp_ctlinput __P((int, struct sockaddr *, void *));
   void spp_quench __P((struct nspcb *));
   int spp_fixmtu __P((struct nspcb *));
   int spp_output __P((struct mbuf *, ...));
   void spp_setpersist __P((struct sppcb *));
   int spp_ctloutput __P((int, struct socket *, int, int, struct mbuf **));
   int spp_usrreq __P((struct socket *, int, struct mbuf *, struct mbuf *,
                       struct mbuf *, struct proc *));
   int spp_usrreq_sp __P((struct socket *, int, struct mbuf *, struct mbuf *,
                          struct mbuf *, struct proc *));
   void spp_template __P((struct sppcb *));
   struct sppcb *spp_close __P((struct sppcb *));
   struct sppcb *spp_usrclosed __P((struct sppcb *));
   struct sppcb *spp_disconnect __P((struct sppcb *));
   struct sppcb *spp_drop __P((struct sppcb *, int));
   void spp_abort __P((struct nspcb *));
   void spp_fasttimo __P((void));
   void spp_slowtimo __P((void));
   struct sppcb *spp_timers __P((struct sppcb *, long));
   #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

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