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kiss_frame.h
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/* kiss_frame.h */
#ifndef KISS_FRAME_H
#define KISS_FRAME_H
#include "audio.h" /* for struct audio_s */
/*
* The first byte of a KISS frame has:
* channel in upper nybble.
* command in lower nybble.
*/
#define KISS_CMD_DATA_FRAME 0
#define KISS_CMD_TXDELAY 1
#define KISS_CMD_PERSISTENCE 2
#define KISS_CMD_SLOTTIME 3
#define KISS_CMD_TXTAIL 4
#define KISS_CMD_FULLDUPLEX 5
#define KISS_CMD_SET_HARDWARE 6
#define XKISS_CMD_DATA 12 // Not supported. http://he.fi/pub/oh7lzb/bpq/multi-kiss.pdf
#define XKISS_CMD_POLL 14 // Not supported.
#define KISS_CMD_END_KISS 15
/*
* Special characters used by SLIP protocol.
*/
#define FEND 0xC0
#define FESC 0xDB
#define TFEND 0xDC
#define TFESC 0xDD
enum kiss_state_e {
KS_SEARCHING = 0, /* Looking for FEND to start KISS frame. */
/* Must be 0 so we can simply zero whole structure to initialize. */
KS_COLLECTING}; /* In process of collecting KISS frame. */
#define MAX_KISS_LEN 2048 /* Spec calls for at least 1024. */
/* Might want to make it longer to accommodate */
/* maximum packet length. */
#define MAX_NOISE_LEN 100
typedef struct kiss_frame_s {
enum kiss_state_e state;
unsigned char kiss_msg[MAX_KISS_LEN];
/* Leading FEND is optional. */
/* Contains escapes and ending FEND. */
int kiss_len;
unsigned char noise[MAX_NOISE_LEN];
int noise_len;
} kiss_frame_t;
// This is used only for TCPKISS but it put in kissnet.h,
// there would be a circular dependency between the two header files.
// Each KISS TCP port has its own status block.
struct kissport_status_s {
struct kissport_status_s *pnext; // To next in list.
volatile int arg2; // temp for passing second arg into
// kissnet_listen_thread
int tcp_port; // default 8001
int chan; // Radio channel for this tcp port.
// -1 for all.
// The default is a limit of 3 client applications at the same time.
// You can increase the limit by changing the line below.
// A larger number consumes more resources so don't go crazy by making it larger than needed.
// TODO: Should this be moved to direwolf.h so max number of audio devices
// client apps are in the same place?
#define MAX_NET_CLIENTS 3
int client_sock[MAX_NET_CLIENTS];
/* File descriptor for socket for */
/* communication with client application. */
/* Set to -1 if not connected. */
/* (Don't use SOCKET type because it is unsigned.) */
kiss_frame_t kf[MAX_NET_CLIENTS];
/* Accumulated KISS frame and state of decoder. */
};
#ifndef KISSUTIL
void kiss_frame_init (struct audio_s *pa);
#endif
int kiss_encapsulate (unsigned char *in, int ilen, unsigned char *out);
int kiss_unwrap (unsigned char *in, int ilen, unsigned char *out);
void kiss_rec_byte (kiss_frame_t *kf, unsigned char ch, int debug, struct kissport_status_s *kps, int client,
void (*sendfun)(int chan, int kiss_cmd, unsigned char *fbuf, int flen, struct kissport_status_s *onlykps, int onlyclient));
typedef enum fromto_e { FROM_CLIENT=0, TO_CLIENT=1 } fromto_t;
void kiss_process_msg (unsigned char *kiss_msg, int kiss_len, int debug, struct kissport_status_s *kps, int client,
void (*sendfun)(int chan, int kiss_cmd, unsigned char *fbuf, int flen, struct kissport_status_s *onlykps, int onlyclient));
void kiss_debug_print (fromto_t fromto, char *special, unsigned char *pmsg, int msg_len);
#endif // KISS_FRAME_H
/* end kiss_frame.h */