bsd/netns/spp_var.h

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Copyright (c) 1984, 1985, 1986, 1987, 1993
  24  *      The Regents of the University of California.  All rights reserved.
  25  *
  26  * Redistribution and use in source and binary forms, with or without
  27  * modification, are permitted provided that the following conditions
  28  * are met:
  29  * 1. Redistributions of source code must retain the above copyright
  30  *    notice, this list of conditions and the following disclaimer.
  31  * 2. Redistributions in binary form must reproduce the above copyright
  32  *    notice, this list of conditions and the following disclaimer in the
  33  *    documentation and/or other materials provided with the distribution.
  34  * 3. All advertising materials mentioning features or use of this software
  35  *    must display the following acknowledgement:
  36  *      This product includes software developed by the University of
  37  *      California, Berkeley and its contributors.
  38  * 4. Neither the name of the University nor the names of its contributors
  39  *    may be used to endorse or promote products derived from this software
  40  *    without specific prior written permission.
  41  *
  42  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  43  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  44  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  45  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  46  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  47  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  48  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  49  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  50  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  51  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  52  * SUCH DAMAGE.
  53  *
  54  *      @(#)spp_var.h   8.1 (Berkeley) 6/10/93
  55  */
  56
  57 /*
  58  * Sp control block, one per connection
  59  */
  60 struct sppcb {
  61         struct  spidp_q s_q;            /* queue for out-of-order receipt */
  62         struct  nspcb   *s_nspcb;       /* backpointer to internet pcb */
  63         u_char  s_state;
  64         u_char  s_flags;
  65 #define SF_ACKNOW       0x01            /* Ack peer immediately */
  66 #define SF_DELACK       0x02            /* Ack, but try to delay it */
  67 #define SF_HI   0x04                    /* Show headers on input */
  68 #define SF_HO   0x08                    /* Show headers on output */
  69 #define SF_PI   0x10                    /* Packet (datagram) interface */
  70 #define SF_WIN  0x20                    /* Window info changed */
  71 #define SF_RXT  0x40                    /* Rxt info changed */
  72 #define SF_RVD  0x80                    /* Calling from read usrreq routine */
  73         u_short s_mtu;                  /* Max packet size for this stream */
  74 /* use sequence fields in headers to store sequence numbers for this
  75    connection */
  76         struct  idp     *s_idp;
  77         struct  sphdr   s_shdr;         /* prototype header to transmit */
  78 #define s_cc s_shdr.sp_cc               /* connection control (for EM bit) */
  79 #define s_dt s_shdr.sp_dt               /* datastream type */
  80 #define s_sid s_shdr.sp_sid             /* source connection identifier */
  81 #define s_did s_shdr.sp_did             /* destination connection identifier */
  82 #define s_seq s_shdr.sp_seq             /* sequence number */
  83 #define s_ack s_shdr.sp_ack             /* acknowledge number */
  84 #define s_alo s_shdr.sp_alo             /* allocation number */
  85 #define s_dport s_idp->idp_dna.x_port   /* where we are sending */
  86         struct sphdr s_rhdr;            /* last received header (in effect!)*/
  87         u_short s_rack;                 /* their acknowledge number */
  88         u_short s_ralo;                 /* their allocation number */
  89         u_short s_smax;                 /* highest packet # we have sent */
  90         u_short s_snxt;                 /* which packet to send next */
  91
  92 /* congestion control */
  93 #define CUNIT   1024                    /* scaling for ... */
  94         int     s_cwnd;                 /* Congestion-controlled window */
  95                                         /* in packets * CUNIT */
  96         short   s_swnd;                 /* == tcp snd_wnd, in packets */
  97         short   s_smxw;                 /* == tcp max_sndwnd */
  98                                         /* difference of two spp_seq's can be
  99                                            no bigger than a short */
 100         u_short s_swl1;                 /* == tcp snd_wl1 */
 101         u_short s_swl2;                 /* == tcp snd_wl2 */
 102         int     s_cwmx;                 /* max allowable cwnd */
 103         int     s_ssthresh;             /* s_cwnd size threshhold for
 104                                          * slow start exponential-to-
 105                                          * linear switch */
 106 /* transmit timing stuff
 107  * srtt and rttvar are stored as fixed point, for convenience in smoothing.
 108  * srtt has 3 bits to the right of the binary point, rttvar has 2.
 109  */
 110         short   s_idle;                 /* time idle */
 111         short   s_timer[SPPT_NTIMERS];  /* timers */
 112         short   s_rxtshift;             /* log(2) of rexmt exp. backoff */
 113         short   s_rxtcur;               /* current retransmit value */
 114         u_short s_rtseq;                /* packet being timed */
 115         short   s_rtt;                  /* timer for round trips */
 116         short   s_srtt;                 /* averaged timer */
 117         short   s_rttvar;               /* variance in round trip time */
 118         char    s_force;                /* which timer expired */
 119         char    s_dupacks;              /* counter to intuit xmt loss */
 120
 121 /* out of band data */
 122         char    s_oobflags;
 123 #define SF_SOOB 0x08                    /* sending out of band data */
 124 #define SF_IOOB 0x10                    /* receiving out of band data */
 125         char    s_iobc;                 /* input characters */
 126 /* debug stuff */
 127         u_short s_want;                 /* Last candidate for sending */
 128         char    s_outx;                 /* exit taken from spp_output */
 129         char    s_inx;                  /* exit taken from spp_input */
 130         u_short s_flags2;               /* more flags for testing */
 131 #define SF_NEWCALL      0x100           /* for new_recvmsg */
 132 #define SO_NEWCALL      10              /* for new_recvmsg */
 133 };
 134
 135 #define nstosppcb(np)   ((struct sppcb *)(np)->nsp_pcb)
 136 #define sotosppcb(so)   (nstosppcb(sotonspcb(so)))
 137
 138 struct  sppstat {
 139         long    spps_connattempt;       /* connections initiated */
 140         long    spps_accepts;           /* connections accepted */
 141         long    spps_connects;          /* connections established */
 142         long    spps_drops;             /* connections dropped */
 143         long    spps_conndrops;         /* embryonic connections dropped */
 144         long    spps_closed;            /* conn. closed (includes drops) */
 145         long    spps_segstimed;         /* segs where we tried to get rtt */
 146         long    spps_rttupdated;        /* times we succeeded */
 147         long    spps_delack;            /* delayed acks sent */
 148         long    spps_timeoutdrop;       /* conn. dropped in rxmt timeout */
 149         long    spps_rexmttimeo;        /* retransmit timeouts */
 150         long    spps_persisttimeo;      /* persist timeouts */
 151         long    spps_keeptimeo;         /* keepalive timeouts */
 152         long    spps_keepprobe;         /* keepalive probes sent */
 153         long    spps_keepdrops;         /* connections dropped in keepalive */
 154
 155         long    spps_sndtotal;          /* total packets sent */
 156         long    spps_sndpack;           /* data packets sent */
 157         long    spps_sndbyte;           /* data bytes sent */
 158         long    spps_sndrexmitpack;     /* data packets retransmitted */
 159         long    spps_sndrexmitbyte;     /* data bytes retransmitted */
 160         long    spps_sndacks;           /* ack-only packets sent */
 161         long    spps_sndprobe;          /* window probes sent */
 162         long    spps_sndurg;            /* packets sent with URG only */
 163         long    spps_sndwinup;          /* window update-only packets sent */
 164         long    spps_sndctrl;           /* control (SYN|FIN|RST) packets sent */
 165         long    spps_sndvoid;           /* couldn't find requested packet*/
 166
 167         long    spps_rcvtotal;          /* total packets received */
 168         long    spps_rcvpack;           /* packets received in sequence */
 169         long    spps_rcvbyte;           /* bytes received in sequence */
 170         long    spps_rcvbadsum;         /* packets received with ccksum errs */
 171         long    spps_rcvbadoff;         /* packets received with bad offset */
 172         long    spps_rcvshort;          /* packets received too short */
 173         long    spps_rcvduppack;        /* duplicate-only packets received */
 174         long    spps_rcvdupbyte;        /* duplicate-only bytes received */
 175         long    spps_rcvpartduppack;    /* packets with some duplicate data */
 176         long    spps_rcvpartdupbyte;    /* dup. bytes in part-dup. packets */
 177         long    spps_rcvoopack;         /* out-of-order packets received */
 178         long    spps_rcvoobyte;         /* out-of-order bytes received */
 179         long    spps_rcvpackafterwin;   /* packets with data after window */
 180         long    spps_rcvbyteafterwin;   /* bytes rcvd after window */
 181         long    spps_rcvafterclose;     /* packets rcvd after "close" */
 182         long    spps_rcvwinprobe;       /* rcvd window probe packets */
 183         long    spps_rcvdupack;         /* rcvd duplicate acks */
 184         long    spps_rcvacktoomuch;     /* rcvd acks for unsent data */
 185         long    spps_rcvackpack;        /* rcvd ack packets */
 186         long    spps_rcvackbyte;        /* bytes acked by rcvd acks */
 187         long    spps_rcvwinupd;         /* rcvd window update packets */
 188 };
 189 struct  spp_istat {
 190         short   hdrops;
 191         short   badsum;
 192         short   badlen;
 193         short   slotim;
 194         short   fastim;
 195         short   nonucn;
 196         short   noconn;
 197         short   notme;
 198         short   wrncon;
 199         short   bdreas;
 200         short   gonawy;
 201         short   notyet;
 202         short   lstdup;
 203         struct sppstat newstats;
 204 };
 205
 206 #ifdef KERNEL
 207 struct spp_istat spp_istat;
 208
 209 /* Following was struct sppstat sppstat; */
 210 #ifndef sppstat
 211 #define sppstat spp_istat.newstats
 212 #endif
 213
 214 u_short spp_iss;
 215 extern struct sppcb *spp_close(), *spp_disconnect(),
 216         *spp_usrclosed(), *spp_timers(), *spp_drop();
 217 #endif
 218
 219 #define SPP_ISSINCR     128
 220 /*
 221  * SPP sequence numbers are 16 bit integers operated
 222  * on with modular arithmetic.  These macros can be
 223  * used to compare such integers.
 224  */
 225 #ifdef sun
 226 short xnsCbug;
 227 #define SSEQ_LT(a,b)    ((xnsCbug = (short)((a)-(b))) < 0)
 228 #define SSEQ_LEQ(a,b)   ((xnsCbug = (short)((a)-(b))) <= 0)
 229 #define SSEQ_GT(a,b)    ((xnsCbug = (short)((a)-(b))) > 0)
 230 #define SSEQ_GEQ(a,b)   ((xnsCbug = (short)((a)-(b))) >= 0)
 231 #else
 232 #define SSEQ_LT(a,b)    (((short)((a)-(b))) < 0)
 233 #define SSEQ_LEQ(a,b)   (((short)((a)-(b))) <= 0)
 234 #define SSEQ_GT(a,b)    (((short)((a)-(b))) > 0)
 235 #define SSEQ_GEQ(a,b)   (((short)((a)-(b))) >= 0)
 236 #endif