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libax25ext.h
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libax25ext.h
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/*
* libax25ext.h: Some added functions for libax25. Conditionally
* compiled only if the installed libax25 has not integrated them.
* Copyright (c) 1999 E. Alan Crosswell, N2YGK
*/
#ifndef HAVE_LIBAX25_EXTENSIONS
struct ax_calls {
ax25_address ax_to_call;
ax25_address ax_from_call;
int ax_n_digis; /* number of digis to follow */
ax25_address ax_digi_call[AX25_MAX_DIGIS];
int ax_next_digi; /* index of next digi (1st non-repeated) */
unsigned char ax_type; /* frame type */
unsigned char ax_pid; /* protocol ID */
};
/*
* parse a received kiss data frame into ax_calls and update data pointer
* and length next byte of frame. Returns -1 on invalid frame, 0
* on valid frame, 1 on valid frame that still has a non-repeated digi.
*/
typedef enum {PK_INVALID=-1,PK_VALID=0,PK_VALDIGI=1} pk_val;
extern pk_val parse_raw_ax25(unsigned char **, int *, struct ax_calls *);
/* parse a received cooked TNC-2 or AEA format data frame */
extern pk_val parse_cooked_ax25(unsigned char **, int *, struct ax_calls *);
/* generate a raw kiss data frame header (converse of parse_raw_ax25) */
extern int gen_raw_ax25(unsigned char **, int *, struct ax_calls *);
/* generate a cooked TNC-2 format data frame header (converse of parse_cooked_ax25) */
extern int gen_cooked_ax25(unsigned char **, int *, struct ax_calls *);
/* pretty version of stand libax25's ax25_ntoa */
extern char *ax25_ntoa_pretty(const ax25_address *a);
#endif