usr/src/sys/deprecated/netdecnet/nsp_var.h

/*      nsp_var.h       1.2     82/05/15        */

/*
 * Kernel variables for NSP
 */

typedef short nsp_seq;

/*
 * NSP control block, ala Session Control Port,
 * p. 41-44, NSP spec.
 */
struct nspcb {
        struct  nspcb *n_next, *n_prev; /* list of all NSP cb's */
        struct  nspcb *n_head;          /* pointer to head of list */
        struct  nspq *nq_next, *nq_prev;        /* retransmit queue */
/* NEED STUFF FOR INPUT REASSEMBLY */
        struct  socket *n_socket;       /* back pointer to socket */
        char    n_state;        /* state of the port */
        char    n_flags;        /* flags, see below */
        short   n_retrans;      /* count of message retransmissions */
        short   n_segsize;      /* transmit segment size */
        u_short n_node;         /* remote node address */
        u_short n_loc;          /* local link address */
        u_short n_rem;          /* remote link address */
/* timer variables */
        u_short nt_dat;         /* timeout for data segments */
        u_short nt_oth;         /* timeout for other data */
        u_short nt_con;         /* timeout for connect, disconnect */
/* sequence variables */
        nsp_seq nn_dat;         /* number of next data segment to transmit */
        nsp_seq nn_oth;         /* number of next other data segment */
        nsp_seq nn_high;        /* highest numbered data segment queued */
/* error control variables */
        nsp_seq na_xmtdat;      /* number of last data segment we acked */
        nsp_seq na_xmtoth;      /* number of last other data we acked */
        nsp_seq na_rcvdat;      /* number of highest data segment ack rcv'ed */
/* flow control variables */
        char    nf_locdat;      /* data request count */
        char    nf_locint;      /* flow control state for receiving intr data */
        char    nf_remdat;      /* data request count from remote */
        char    nf_remint;      /* interrupt request count from remote */
/* buffers for optional data */
        u_short nb_src;         /* source node addr for rcv CI */
        struct  mbuf *nb_con;   /* data for rcv or xmt CI */
        struct  mbuf *nb_xmt;   /* data for xmt CC, DI, Intr */
        struct  mbuf *nb_rcv;   /* data for rcv CC, DI, Intr */
};

#define sotonspcb(so)   ((struct nspcb *)(so)->so_pcb)

/* port states, p. 34-36 */
#define NS_O            0       /* open */
#define NS_CR           1       /* connect received */
#define NS_DR           2       /* disconnect reject */
#define NS_DRC          3       /* disconnect reject complete */
#define NS_CC           4       /* connect confirm */
#define NS_CI           5       /* connect initiate */
#define NS_NR           6       /* no resources */
#define NS_NC           7       /* no communication */
#define NS_CD           8       /* connect delivered */
#define NS_RJ           9       /* rejected */
#define NS_RUN          10      /* running */
#define NS_DI           11      /* disconnect initiate */
#define NS_DIC          12      /* disconnect complete */
#define NS_DN           13      /* disconnect notification */
#define NS_CL           14      /* closed */
#define NS_CN           15      /* closed notification */
#define NS_LI           16      /* listen for connection */

/* flags */
#define NF_DATACK       0001    /* data acknowledgement required */
#define NF_OTHACK       0002    /* other data acknowledgement required */
#define NF_CON          0004    /* connect data available */
#define NF_INTAVAIL     0010    /* transmit interrupt data available */
#define NF_OTHSENT      0020    /* other data message has been sent */
#define NF_OTHINTR      0040    /* other data message was an interrupt msg */
#define NF_DATOFF       0100    /* on/off switch for data flow control */

/* locint states */
/* I STILL DON'T UNDERSTAND THIS WELL ENOUGH */
#define NFL_EMPTY       0
#define NFL_INTR        1
#define NFL_SEND        2