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

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1984, 1985, 1986 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  *
        !             6:  *     @(#)spp_var.h   7.1 (Berkeley) 6/5/86
        !             7:  */
        !             8: 
        !             9: /*
        !            10:  * Sp control block, one per connection
        !            11:  */
        !            12: struct sppcb {
        !            13:        struct  spidp_q s_q;            /* queue for out-of-order receipt */
        !            14:        struct  nspcb   *s_nspcb;       /* backpointer to internet pcb */
        !            15:        u_char  s_state;
        !            16:        u_char  s_flags;
        !            17: #define SF_AK  0x01                    /* Acknowledgement requested */
        !            18: #define SF_DELACK 0x02                 /* Ak, waiting to see if we xmit*/
        !            19: #define SF_HI  0x04                    /* Show headers on input */
        !            20: #define SF_HO  0x08                    /* Show headers on output */
        !            21: #define SF_PI  0x10                    /* Packet (datagram) interface */
        !            22:        u_short s_mtu;                  /* Max packet size for this stream */
        !            23: /* use sequence fields in headers to store sequence numbers for this
        !            24:    connection */
        !            25:        struct  spidp s_shdr;           /* prototype header to transmit */
        !            26: #define s_cc s_shdr.si_cc              /* connection control (for EM bit) */
        !            27: #define s_dt s_shdr.si_dt              /* datastream type */
        !            28: #define s_sid s_shdr.si_sid            /* source connection identifier */
        !            29: #define s_did s_shdr.si_did            /* destination connection identifier */
        !            30: #define s_seq s_shdr.si_seq            /* sequence number */
        !            31: #define s_ack s_shdr.si_ack            /* acknowledge number */
        !            32: #define s_alo s_shdr.si_alo            /* allocation number */
        !            33: #define s_dport s_shdr.si_dna.x_port   /* where we are sending */
        !            34:        struct sphdr s_rhdr;            /* last received header (in effect!)*/
        !            35:        u_short s_rack;                 /* their acknowledge number */
        !            36:        u_short s_ralo;                 /* their allocation number */
        !            37:        u_short s_snt;                  /* highest packet # we have sent */
        !            38: 
        !            39: /* timeout stuff */
        !            40:        short   s_idle;                 /* time idle */
        !            41:        short   s_timer[TCPT_NTIMERS];  /* timers */
        !            42:        short   s_rxtshift;             /* log(2) of rexmt exp. backoff */
        !            43:        u_short s_rtseq;                /* packet being timed */
        !            44:        short   s_rtt;                  /* timer for round trips */
        !            45:        short   s_srtt;                 /* averaged timer */
        !            46:        char    s_force;                /* which timer expired */
        !            47: 
        !            48: /* out of band data */
        !            49:        char    s_oobflags;
        !            50: #define SF_SOOB        0x08                    /* sending out of band data */
        !            51: #define SF_IOOB 0x10                   /* receiving out of band data */
        !            52:        char    s_iobc;                 /* input characters */
        !            53: /* debug stuff */
        !            54:        u_short s_want;                 /* Last candidate for sending */
        !            55: };
        !            56: 
        !            57: #define        nstosppcb(np)   ((struct sppcb *)(np)->nsp_pcb)
        !            58: #define        sotosppcb(so)   (nstosppcb(sotonspcb(so)))
        !            59: 
        !            60: struct spp_istat {
        !            61:        short   hdrops;
        !            62:        short   badsum;
        !            63:        short   badlen;
        !            64:        short   slotim;
        !            65:        short   fastim;
        !            66:        short   nonucn;
        !            67:        short   noconn;
        !            68:        short   notme;
        !            69:        short   wrncon;
        !            70:        short   bdreas;
        !            71:        short   gonawy;
        !            72:        short   notyet;
        !            73:        short   lstdup;
        !            74: };
        !            75: 
        !            76: #ifdef KERNEL
        !            77: struct spp_istat spp_istat;
        !            78: u_short spp_iss;
        !            79: extern struct sppcb *spp_close(), *spp_disconnect(),
        !            80:        *spp_usrclosed(), *spp_timers(), *spp_drop();
        !            81: #endif
        !            82: 
        !            83: #define        SPP_ISSINCR     128
        !            84: /*
        !            85:  * SPP sequence numbers are 16 bit integers operated
        !            86:  * on with modular arithmetic.  These macros can be
        !            87:  * used to compare such integers.
        !            88:  */
        !            89: #define        SSEQ_LT(a,b)    (((short)((a)-(b))) < 0)
        !            90: #define        SSEQ_LEQ(a,b)   (((short)((a)-(b))) <= 0)
        !            91: #define        SSEQ_GT(a,b)    (((short)((a)-(b))) > 0)
        !            92: #define        SSEQ_GEQ(a,b)   (((short)((a)-(b))) >= 0)

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