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Annotation of 43BSDReno/sys/netns/spp_var.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1984, 1985, 1986, 1987 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution is only permitted until one year after the first shipment
        !             6:  * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
        !             7:  * binary forms are permitted provided that: (1) source distributions retain
        !             8:  * this entire copyright notice and comment, and (2) distributions including
        !             9:  * binaries display the following acknowledgement:  This product includes
        !            10:  * software developed by the University of California, Berkeley and its
        !            11:  * contributors'' in the documentation or other materials provided with the
        !            12:  * distribution and in all advertising materials mentioning features or use
        !            13:  * of this software.  Neither the name of the University nor the names of
        !            14:  * its contributors may be used to endorse or promote products derived from
        !            15:  * this software without specific prior written permission.
        !            16:  * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            17:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            18:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            19:  *
        !            20:  *     @(#)spp_var.h   7.7 (Berkeley) 6/28/90
        !            21:  */
        !            22: 
        !            23: /*
        !            24:  * Sp control block, one per connection
        !            25:  */
        !            26: struct sppcb {
        !            27:        struct  spidp_q s_q;            /* queue for out-of-order receipt */
        !            28:        struct  nspcb   *s_nspcb;       /* backpointer to internet pcb */
        !            29:        u_char  s_state;
        !            30:        u_char  s_flags;
        !            31: #define        SF_ACKNOW       0x01            /* Ack peer immediately */
        !            32: #define        SF_DELACK       0x02            /* Ack, but try to delay it */
        !            33: #define        SF_HI   0x04                    /* Show headers on input */
        !            34: #define        SF_HO   0x08                    /* Show headers on output */
        !            35: #define        SF_PI   0x10                    /* Packet (datagram) interface */
        !            36: #define SF_WIN 0x20                    /* Window info changed */
        !            37: #define SF_RXT 0x40                    /* Rxt info changed */
        !            38: #define SF_RVD 0x80                    /* Calling from read usrreq routine */
        !            39:        u_short s_mtu;                  /* Max packet size for this stream */
        !            40: /* use sequence fields in headers to store sequence numbers for this
        !            41:    connection */
        !            42:        struct  idp     *s_idp;
        !            43:        struct  sphdr   s_shdr;         /* prototype header to transmit */
        !            44: #define s_cc s_shdr.sp_cc              /* connection control (for EM bit) */
        !            45: #define s_dt s_shdr.sp_dt              /* datastream type */
        !            46: #define s_sid s_shdr.sp_sid            /* source connection identifier */
        !            47: #define s_did s_shdr.sp_did            /* destination connection identifier */
        !            48: #define s_seq s_shdr.sp_seq            /* sequence number */
        !            49: #define s_ack s_shdr.sp_ack            /* acknowledge number */
        !            50: #define s_alo s_shdr.sp_alo            /* allocation number */
        !            51: #define s_dport s_idp->idp_dna.x_port  /* where we are sending */
        !            52:        struct sphdr s_rhdr;            /* last received header (in effect!)*/
        !            53:        u_short s_rack;                 /* their acknowledge number */
        !            54:        u_short s_ralo;                 /* their allocation number */
        !            55:        u_short s_smax;                 /* highest packet # we have sent */
        !            56:        u_short s_snxt;                 /* which packet to send next */
        !            57: 
        !            58: /* congestion control */
        !            59: #define        CUNIT   1024                    /* scaling for ... */
        !            60:        int     s_cwnd;                 /* Congestion-controlled window */
        !            61:                                        /* in packets * CUNIT */
        !            62:        short   s_swnd;                 /* == tcp snd_wnd, in packets */
        !            63:        short   s_smxw;                 /* == tcp max_sndwnd */
        !            64:                                        /* difference of two spp_seq's can be
        !            65:                                           no bigger than a short */
        !            66:        u_short s_swl1;                 /* == tcp snd_wl1 */
        !            67:        u_short s_swl2;                 /* == tcp snd_wl2 */
        !            68:        int     s_cwmx;                 /* max allowable cwnd */
        !            69:        int     s_ssthresh;             /* s_cwnd size threshhold for
        !            70:                                         * slow start exponential-to-
        !            71:                                         * linear switch */
        !            72: /* transmit timing stuff
        !            73:  * srtt and rttvar are stored as fixed point, for convenience in smoothing.
        !            74:  * srtt has 3 bits to the right of the binary point, rttvar has 2.
        !            75:  */
        !            76:        short   s_idle;                 /* time idle */
        !            77:        short   s_timer[SPPT_NTIMERS];  /* timers */
        !            78:        short   s_rxtshift;             /* log(2) of rexmt exp. backoff */
        !            79:        short   s_rxtcur;               /* current retransmit value */
        !            80:        u_short s_rtseq;                /* packet being timed */
        !            81:        short   s_rtt;                  /* timer for round trips */
        !            82:        short   s_srtt;                 /* averaged timer */
        !            83:        short   s_rttvar;               /* variance in round trip time */
        !            84:        char    s_force;                /* which timer expired */
        !            85:        char    s_dupacks;              /* counter to intuit xmt loss */
        !            86: 
        !            87: /* out of band data */
        !            88:        char    s_oobflags;
        !            89: #define SF_SOOB        0x08                    /* sending out of band data */
        !            90: #define SF_IOOB 0x10                   /* receiving out of band data */
        !            91:        char    s_iobc;                 /* input characters */
        !            92: /* debug stuff */
        !            93:        u_short s_want;                 /* Last candidate for sending */
        !            94:        char    s_outx;                 /* exit taken from spp_output */
        !            95:        char    s_inx;                  /* exit taken from spp_input */
        !            96:        u_short s_flags2;               /* more flags for testing */
        !            97: #define SF_NEWCALL     0x100           /* for new_recvmsg */
        !            98: #define SO_NEWCALL     10              /* for new_recvmsg */
        !            99: };
        !           100: 
        !           101: #define        nstosppcb(np)   ((struct sppcb *)(np)->nsp_pcb)
        !           102: #define        sotosppcb(so)   (nstosppcb(sotonspcb(so)))
        !           103: 
        !           104: struct sppstat {
        !           105:        long    spps_connattempt;       /* connections initiated */
        !           106:        long    spps_accepts;           /* connections accepted */
        !           107:        long    spps_connects;          /* connections established */
        !           108:        long    spps_drops;             /* connections dropped */
        !           109:        long    spps_conndrops;         /* embryonic connections dropped */
        !           110:        long    spps_closed;            /* conn. closed (includes drops) */
        !           111:        long    spps_segstimed;         /* segs where we tried to get rtt */
        !           112:        long    spps_rttupdated;        /* times we succeeded */
        !           113:        long    spps_delack;            /* delayed acks sent */
        !           114:        long    spps_timeoutdrop;       /* conn. dropped in rxmt timeout */
        !           115:        long    spps_rexmttimeo;        /* retransmit timeouts */
        !           116:        long    spps_persisttimeo;      /* persist timeouts */
        !           117:        long    spps_keeptimeo;         /* keepalive timeouts */
        !           118:        long    spps_keepprobe;         /* keepalive probes sent */
        !           119:        long    spps_keepdrops;         /* connections dropped in keepalive */
        !           120: 
        !           121:        long    spps_sndtotal;          /* total packets sent */
        !           122:        long    spps_sndpack;           /* data packets sent */
        !           123:        long    spps_sndbyte;           /* data bytes sent */
        !           124:        long    spps_sndrexmitpack;     /* data packets retransmitted */
        !           125:        long    spps_sndrexmitbyte;     /* data bytes retransmitted */
        !           126:        long    spps_sndacks;           /* ack-only packets sent */
        !           127:        long    spps_sndprobe;          /* window probes sent */
        !           128:        long    spps_sndurg;            /* packets sent with URG only */
        !           129:        long    spps_sndwinup;          /* window update-only packets sent */
        !           130:        long    spps_sndctrl;           /* control (SYN|FIN|RST) packets sent */
        !           131:        long    spps_sndvoid;           /* couldn't find requested packet*/
        !           132: 
        !           133:        long    spps_rcvtotal;          /* total packets received */
        !           134:        long    spps_rcvpack;           /* packets received in sequence */
        !           135:        long    spps_rcvbyte;           /* bytes received in sequence */
        !           136:        long    spps_rcvbadsum;         /* packets received with ccksum errs */
        !           137:        long    spps_rcvbadoff;         /* packets received with bad offset */
        !           138:        long    spps_rcvshort;          /* packets received too short */
        !           139:        long    spps_rcvduppack;        /* duplicate-only packets received */
        !           140:        long    spps_rcvdupbyte;        /* duplicate-only bytes received */
        !           141:        long    spps_rcvpartduppack;    /* packets with some duplicate data */
        !           142:        long    spps_rcvpartdupbyte;    /* dup. bytes in part-dup. packets */
        !           143:        long    spps_rcvoopack;         /* out-of-order packets received */
        !           144:        long    spps_rcvoobyte;         /* out-of-order bytes received */
        !           145:        long    spps_rcvpackafterwin;   /* packets with data after window */
        !           146:        long    spps_rcvbyteafterwin;   /* bytes rcvd after window */
        !           147:        long    spps_rcvafterclose;     /* packets rcvd after "close" */
        !           148:        long    spps_rcvwinprobe;       /* rcvd window probe packets */
        !           149:        long    spps_rcvdupack;         /* rcvd duplicate acks */
        !           150:        long    spps_rcvacktoomuch;     /* rcvd acks for unsent data */
        !           151:        long    spps_rcvackpack;        /* rcvd ack packets */
        !           152:        long    spps_rcvackbyte;        /* bytes acked by rcvd acks */
        !           153:        long    spps_rcvwinupd;         /* rcvd window update packets */
        !           154: };
        !           155: struct spp_istat {
        !           156:        short   hdrops;
        !           157:        short   badsum;
        !           158:        short   badlen;
        !           159:        short   slotim;
        !           160:        short   fastim;
        !           161:        short   nonucn;
        !           162:        short   noconn;
        !           163:        short   notme;
        !           164:        short   wrncon;
        !           165:        short   bdreas;
        !           166:        short   gonawy;
        !           167:        short   notyet;
        !           168:        short   lstdup;
        !           169:        struct sppstat newstats;
        !           170: };
        !           171: 
        !           172: #ifdef KERNEL
        !           173: struct spp_istat spp_istat;
        !           174: 
        !           175: /* Following was struct sppstat sppstat; */
        !           176: #ifndef sppstat
        !           177: #define sppstat spp_istat.newstats
        !           178: #endif
        !           179: 
        !           180: u_short spp_iss;
        !           181: extern struct sppcb *spp_close(), *spp_disconnect(),
        !           182:        *spp_usrclosed(), *spp_timers(), *spp_drop();
        !           183: #endif
        !           184: 
        !           185: #define        SPP_ISSINCR     128
        !           186: /*
        !           187:  * SPP sequence numbers are 16 bit integers operated
        !           188:  * on with modular arithmetic.  These macros can be
        !           189:  * used to compare such integers.
        !           190:  */
        !           191: #ifdef sun
        !           192: short xnsCbug;
        !           193: #define        SSEQ_LT(a,b)    ((xnsCbug = (short)((a)-(b))) < 0)
        !           194: #define        SSEQ_LEQ(a,b)   ((xnsCbug = (short)((a)-(b))) <= 0)
        !           195: #define        SSEQ_GT(a,b)    ((xnsCbug = (short)((a)-(b))) > 0)
        !           196: #define        SSEQ_GEQ(a,b)   ((xnsCbug = (short)((a)-(b))) >= 0)
        !           197: #else
        !           198: #define        SSEQ_LT(a,b)    (((short)((a)-(b))) < 0)
        !           199: #define        SSEQ_LEQ(a,b)   (((short)((a)-(b))) <= 0)
        !           200: #define        SSEQ_GT(a,b)    (((short)((a)-(b))) > 0)
        !           201: #define        SSEQ_GEQ(a,b)   (((short)((a)-(b))) >= 0)
        !           202: #endif

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