sys/netproto/ns/spp_var.h

   1 /*
   2  * Copyright (c) 1984, 1985, 1986, 1987, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)spp_var.h   8.1 (Berkeley) 6/10/93
  34  * $FreeBSD: src/sys/netns/spp_var.h,v 1.11 1999/12/29 04:46:21 peter Exp $
  35  * $DragonFly: src/sys/netproto/ns/spp_var.h,v 1.7 2005/01/23 13:21:44 joerg Exp $
  36  */
  37
  38 #ifndef _NETNS_SPP_VAR_H_
  39 #define _NETNS_SPP_VAR_H_
  40
  41 /*
  42  * Sp control block, one per connection
  43  */
  44 struct sppcb {
  45         struct  spidp_q s_q;            /* queue for out-of-order receipt */
  46         struct  nspcb   *s_nspcb;       /* backpointer to internet pcb */
  47         u_char  s_state;
  48         u_char  s_flags;
  49 #define SF_ACKNOW       0x01            /* Ack peer immediately */
  50 #define SF_DELACK       0x02            /* Ack, but try to delay it */
  51 #define SF_HI   0x04                    /* Show headers on input */
  52 #define SF_HO   0x08                    /* Show headers on output */
  53 #define SF_PI   0x10                    /* Packet (datagram) interface */
  54 #define SF_WIN  0x20                    /* Window info changed */
  55 #define SF_RXT  0x40                    /* Rxt info changed */
  56 #define SF_RVD  0x80                    /* Calling from read usrreq routine */
  57         u_short s_mtu;                  /* Max packet size for this stream */
  58 /* use sequence fields in headers to store sequence numbers for this
  59    connection */
  60         struct  idp     *s_idp;
  61         struct  sphdr   s_shdr;         /* prototype header to transmit */
  62 #define s_cc s_shdr.sp_cc               /* connection control (for EM bit) */
  63 #define s_dt s_shdr.sp_dt               /* datastream type */
  64 #define s_sid s_shdr.sp_sid             /* source connection identifier */
  65 #define s_did s_shdr.sp_did             /* destination connection identifier */
  66 #define s_seq s_shdr.sp_seq             /* sequence number */
  67 #define s_ack s_shdr.sp_ack             /* acknowledge number */
  68 #define s_alo s_shdr.sp_alo             /* allocation number */
  69 #define s_dport s_idp->idp_dna.x_port   /* where we are sending */
  70         struct sphdr s_rhdr;            /* last received header (in effect!)*/
  71         u_short s_rack;                 /* their acknowledge number */
  72         u_short s_ralo;                 /* their allocation number */
  73         u_short s_smax;                 /* highest packet # we have sent */
  74         u_short s_snxt;                 /* which packet to send next */
  75
  76 /* congestion control */
  77 #define CUNIT   1024                    /* scaling for ... */
  78         int     s_cwnd;                 /* Congestion-controlled window */
  79                                         /* in packets * CUNIT */
  80         short   s_swnd;                 /* == tcp snd_wnd, in packets */
  81         short   s_smxw;                 /* == tcp max_sndwnd */
  82                                         /* difference of two spp_seq's can be
  83                                            no bigger than a short */
  84         u_short s_swl1;                 /* == tcp snd_wl1 */
  85         u_short s_swl2;                 /* == tcp snd_wl2 */
  86         int     s_cwmx;                 /* max allowable cwnd */
  87         int     s_ssthresh;             /* s_cwnd size threshhold for
  88                                          * slow start exponential-to-
  89                                          * linear switch */
  90 /* transmit timing stuff
  91  * srtt and rttvar are stored as fixed point, for convenience in smoothing.
  92  * srtt has 3 bits to the right of the binary point, rttvar has 2.
  93  */
  94         short   s_idle;                 /* time idle */
  95         short   s_timer[SPPT_NTIMERS];  /* timers */
  96         short   s_rxtshift;             /* log(2) of rexmt exp. backoff */
  97         short   s_rxtcur;               /* current retransmit value */
  98         u_short s_rtseq;                /* packet being timed */
  99         short   s_rtt;                  /* timer for round trips */
 100         short   s_srtt;                 /* averaged timer */
 101         short   s_rttvar;               /* variance in round trip time */
 102         char    s_force;                /* which timer expired */
 103         char    s_dupacks;              /* counter to intuit xmt loss */
 104
 105 /* out of band data */
 106         char    s_oobflags;
 107 #define SF_SOOB 0x08                    /* sending out of band data */
 108 #define SF_IOOB 0x10                    /* receiving out of band data */
 109         char    s_iobc;                 /* input characters */
 110 /* debug stuff */
 111         u_short s_want;                 /* Last candidate for sending */
 112         char    s_outx;                 /* exit taken from spp_output */
 113         char    s_inx;                  /* exit taken from spp_input */
 114         u_short s_flags2;               /* more flags for testing */
 115 #define SF_NEWCALL      0x100           /* for new_recvmsg */
 116 #define SO_NEWCALL      10              /* for new_recvmsg */
 117 };
 118
 119 #define nstosppcb(np)   ((struct sppcb *)(np)->nsp_pcb)
 120 #define sotosppcb(so)   (nstosppcb(sotonspcb(so)))
 121
 122 struct  sppstat {
 123         long    spps_connattempt;       /* connections initiated */
 124         long    spps_accepts;           /* connections accepted */
 125         long    spps_connects;          /* connections established */
 126         long    spps_drops;             /* connections dropped */
 127         long    spps_conndrops;         /* embryonic connections dropped */
 128         long    spps_closed;            /* conn. closed (includes drops) */
 129         long    spps_segstimed;         /* segs where we tried to get rtt */
 130         long    spps_rttupdated;        /* times we succeeded */
 131         long    spps_delack;            /* delayed acks sent */
 132         long    spps_timeoutdrop;       /* conn. dropped in rxmt timeout */
 133         long    spps_rexmttimeo;        /* retransmit timeouts */
 134         long    spps_persisttimeo;      /* persist timeouts */
 135         long    spps_keeptimeo;         /* keepalive timeouts */
 136         long    spps_keepprobe;         /* keepalive probes sent */
 137         long    spps_keepdrops;         /* connections dropped in keepalive */
 138
 139         long    spps_sndtotal;          /* total packets sent */
 140         long    spps_sndpack;           /* data packets sent */
 141         long    spps_sndbyte;           /* data bytes sent */
 142         long    spps_sndrexmitpack;     /* data packets retransmitted */
 143         long    spps_sndrexmitbyte;     /* data bytes retransmitted */
 144         long    spps_sndacks;           /* ack-only packets sent */
 145         long    spps_sndprobe;          /* window probes sent */
 146         long    spps_sndurg;            /* packets sent with URG only */
 147         long    spps_sndwinup;          /* window update-only packets sent */
 148         long    spps_sndctrl;           /* control (SYN|FIN|RST) packets sent */
 149         long    spps_sndvoid;           /* couldn't find requested packet*/
 150
 151         long    spps_rcvtotal;          /* total packets received */
 152         long    spps_rcvpack;           /* packets received in sequence */
 153         long    spps_rcvbyte;           /* bytes received in sequence */
 154         long    spps_rcvbadsum;         /* packets received with ccksum errs */
 155         long    spps_rcvbadoff;         /* packets received with bad offset */
 156         long    spps_rcvshort;          /* packets received too short */
 157         long    spps_rcvduppack;        /* duplicate-only packets received */
 158         long    spps_rcvdupbyte;        /* duplicate-only bytes received */
 159         long    spps_rcvpartduppack;    /* packets with some duplicate data */
 160         long    spps_rcvpartdupbyte;    /* dup. bytes in part-dup. packets */
 161         long    spps_rcvoopack;         /* out-of-order packets received */
 162         long    spps_rcvoobyte;         /* out-of-order bytes received */
 163         long    spps_rcvpackafterwin;   /* packets with data after window */
 164         long    spps_rcvbyteafterwin;   /* bytes rcvd after window */
 165         long    spps_rcvafterclose;     /* packets rcvd after "close" */
 166         long    spps_rcvwinprobe;       /* rcvd window probe packets */
 167         long    spps_rcvdupack;         /* rcvd duplicate acks */
 168         long    spps_rcvacktoomuch;     /* rcvd acks for unsent data */
 169         long    spps_rcvackpack;        /* rcvd ack packets */
 170         long    spps_rcvackbyte;        /* bytes acked by rcvd acks */
 171         long    spps_rcvwinupd;         /* rcvd window update packets */
 172 };
 173 struct  spp_istat {
 174         short   hdrops;
 175         short   badsum;
 176         short   badlen;
 177         short   slotim;
 178         short   fastim;
 179         short   nonucn;
 180         short   noconn;
 181         short   notme;
 182         short   wrncon;
 183         short   bdreas;
 184         short   gonawy;
 185         short   notyet;
 186         short   lstdup;
 187         struct sppstat newstats;
 188 };
 189
 190 #ifdef _KERNEL
 191 extern struct spp_istat spp_istat;
 192 extern struct pr_usrreqs spp_usrreqs;
 193 extern struct pr_usrreqs spp_usrreqs_sp;
 194 extern u_short spp_iss;
 195
 196 /* Following was struct sppstat sppstat; */
 197 #ifndef sppstat
 198 #define sppstat spp_istat.newstats
 199 #endif
 200
 201 void spp_init (void);
 202 void spp_input (struct mbuf *, /* struct nspcb *, */ ...);
 203 void spp_ctlinput (int, caddr_t);
 204 int spp_ctloutput (int, struct socket *, int, int, struct mbuf **);
 205 void spp_fasttimo (void);
 206 void spp_slowtimo (void);
 207 void spp_template (struct sppcb *);
 208 int spp_reass (struct sppcb *, struct spidp *, struct mbuf *);
 209 int spp_output (struct sppcb *, struct mbuf *);
 210 void spp_quench (struct nspcb *);
 211 void spp_abort (struct nspcb *);
 212 void spp_setpersist (struct sppcb *);
 213
 214 struct sppcb *spp_close (struct sppcb *);
 215 struct sppcb *spp_disconnect (struct sppcb *);
 216 struct sppcb *spp_usrclosed (struct sppcb *);
 217 struct sppcb *spp_timers (struct sppcb *, int);
 218 struct sppcb *spp_drop (struct sppcb *, int);
 219
 220 #endif
 221
 222 #define SPP_ISSINCR     128
 223 /*
 224  * SPP sequence numbers are 16 bit integers operated
 225  * on with modular arithmetic.  These macros can be
 226  * used to compare such integers.
 227  */
 228 #ifdef sun
 229 short xnsCbug;
 230 #define SSEQ_LT(a,b)    ((xnsCbug = (short)((a)-(b))) < 0)
 231 #define SSEQ_LEQ(a,b)   ((xnsCbug = (short)((a)-(b))) <= 0)
 232 #define SSEQ_GT(a,b)    ((xnsCbug = (short)((a)-(b))) > 0)
 233 #define SSEQ_GEQ(a,b)   ((xnsCbug = (short)((a)-(b))) >= 0)
 234 #else
 235 #define SSEQ_LT(a,b)    (((short)((a)-(b))) < 0)
 236 #define SSEQ_LEQ(a,b)   (((short)((a)-(b))) <= 0)
 237 #define SSEQ_GT(a,b)    (((short)((a)-(b))) > 0)
 238 #define SSEQ_GEQ(a,b)   (((short)((a)-(b))) >= 0)
 239 #endif
 240
 241 #endif