38 lines
1.3 KiB
C
38 lines
1.3 KiB
C
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/* HEADER - P_LLMAC.H
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Copyright (C) Psion PLC 1991-92
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VER DATE BY DESCRIPTION
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===== ======== === ===========
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1.00F 26/04/90 NSM First relase
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1.10F 07/07/92 NSM Second release
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*/
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#ifndef P_LLMAC_H
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#define P_LLMAC_H
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#include <stdepoc.h>
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#define P_MAXILEN 300 /* maximum length of information field */
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#define MAXFRM 4 /* maximum number of frames in supervisory Q */
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#define SERNOCHAR (-1) /* no character to transmit */
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/* Frame type codes */
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#define LA_LPDU 0 /* The Link Acknowledge PDU */
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#define LD_LPDU 1 /* The Link disconnect PDU */
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#define LR_LPDU 2 /* The Link Request PDU*/
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#define LT_LPDU 3 /* The Link Data PDU */
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#define P_FRM_BROKEN 4 /* A broken frame */
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typedef struct
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{
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unsigned char type; /* frame type or P_FRM_BROKEN for a broken frame */
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unsigned char seq; /* frame sequence */
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short int len; /* length of information field */
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unsigned char *pbuf; /* data buffer (INFO) */
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} P_FRAME;
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/* LLMAC layer characteristics */
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typedef struct
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{
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unsigned short int ilen; /* maximum information field length */
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unsigned short int speed; /* nominal speed in characters per second */
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unsigned short int rtint; /* suggested retransmission interval */
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} P_LLMAC;
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#endif // P_LLMAC_H
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