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Annotation of researchv9/jerq/src/mux/proto/packets.h, revision 1.1.1.1

1.1       root        1: #ifdef XT
                      2: #ifndef        NPCBUFS
                      3: #include       "sys/xtproto.h"
                      4: #endif
                      5: #define        freepkts        outen
                      6: #define        user            flags
                      7: #else  XT
                      8: 
                      9: /*
                     10: **     Definition of a structure to hold status information
                     11: **     for a conversation with a channel.
                     12: */
                     13: 
                     14: #define        NPCBUFS         2                       /* Double buffered protocol */
                     15: 
                     16: struct Pktstate
                     17: {
                     18:        struct Packet   pkt;                    /* The packet */
                     19:        short           timo;                   /* Timeout count */
                     20:        unsigned char   state;                  /* Protocol state */
                     21:        unsigned char   size;                   /* Packet size */
                     22: };
                     23: 
                     24: typedef struct Pktstate        *Pks_p;
                     25: 
                     26: struct Pchannel
                     27: {
                     28:        struct Pktstate pkts[NPCBUFS];          /* The packets */
                     29:        Pks_p           nextpkt;                /* Next packet to be acknowledged */
                     30:        unsigned char   cdata[SEQMOD];          /* Remember control data */
                     31:        unsigned char   rseq;                   /* Next receive sequence number */
                     32:        unsigned char   xseq;                   /* Next transmit sequence number */
                     33:        char            freepkts;               /* Number of free buffers */
                     34:        char            user;                   /* Spare byte for users */
                     35: };
                     36: 
                     37: typedef struct Pchannel        *       Pch_p;
                     38: 
                     39: /**    Transmit packet states  **/
                     40: 
                     41: enum pxenum /* required to have name for m32 sgs */ {  px_null, px_wait, px_ok };
                     42: 
                     43: #define        PX_NULL         (int)px_null            /* Empty packet */
                     44: #define        PX_WAIT         (int)px_wait            /* Packet awaiting acknowledgement */
                     45: #define        PX_OK           (int)px_ok              /* Packet has been acknowledged */
                     46: 
                     47: /**    Receive packet states   **/
                     48: 
                     49: enum prenum /* required to have name for m32 sgs */ { pr_null, pr_size, pr_data };
                     50: 
                     51: #define        PR_NULL         (int)pr_null            /* New packet expected */
                     52: #define        PR_SIZE         (int)pr_size            /* Size byte next */
                     53: #define        PR_DATA         (int)pr_data            /* Receiving data */
                     54: #endif XT
                     55: 
                     56: /*
                     57: **     Interface routines
                     58: */
                     59: 
                     60: extern int             psend();                /* Send data to channel */
                     61: extern void            precv();                /* Receive data/control from channel */
                     62: extern void            ptimeout();             /* Catch alarm timeouts */
                     63: extern int             pinit();                /* Initialise conversations */
                     64: 
                     65: /*
                     66: **     Pointers to externally declared data and functions
                     67: */
                     68: 
                     69: extern struct Pchannel pconvs[];               /* Array of conversations */
                     70: extern Pch_p           pconvsend;              /* Pointer to end of pconvs */
                     71: 
                     72: /*
                     73: **     Receiver data
                     74: */
                     75: 
                     76: extern struct Pktstate precvpkt;               /* Current receive packet */
                     77: extern Pbyte           pseqtable[];            /* Table of ordered sequence numbers */
                     78: 
                     79: #ifdef EBUG
                     80: /*
                     81: **     Debugging
                     82: */
                     83: 
                     84: #define        PDEBUG          1
                     85: #ifndef        PSTATISTICS
                     86: #define        PSTATISTICS     1
                     87: #endif
                     88: #ifndef        PSTATSDESC
                     89: #define        PSTATSDESC      1
                     90: #endif
                     91: #define        PKTHIST         40
                     92: #define        PLOGIN          0
                     93: #define        PLOGOUT         1
                     94: 
                     95: #include               <stdio.h>
                     96: 
                     97: extern FILE *          ptracefd;
                     98: extern void            ptracepkt();
                     99: extern void            plogpkt();
                    100: extern void            pdumphist();
                    101: 
                    102: #define        ptrace(A)       fprintf(ptracefd,"trace: %s\n",A)
                    103: 
                    104: #else  EBUG
                    105: 
                    106: #define        ptrace(A)
                    107: #define        ptracepkt(A,B)
                    108: #define        plogpkt(A,B)
                    109: #define        pdumphist(A)
                    110: 
                    111: #endif EBUG

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