mirror of https://github.com/wb2osz/direwolf.git
143 lines
3.5 KiB
C
143 lines
3.5 KiB
C
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/*------------------------------------------------------------------
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*
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* Module: dlq.h
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*
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*---------------------------------------------------------------*/
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#ifndef DLQ_H
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#define DLQ_H 1
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#include "ax25_pad.h"
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#include "audio.h"
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/* A transmit or receive data block for connected mode. */
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typedef struct cdata_s {
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int magic; /* For integrity checking. */
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#define TXDATA_MAGIC 0x09110911
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struct cdata_s *next; /* Pointer to next when part of a list. */
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int pid; /* Protocol id. */
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int size; /* Number of bytes allocated. */
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int len; /* Number of bytes actually used. */
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char data[]; /* Variable length data. */
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} cdata_t;
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/* Types of things that can be in queue. */
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typedef enum dlq_type_e {DLQ_REC_FRAME, DLQ_CONNECT_REQUEST, DLQ_DISCONNECT_REQUEST, DLQ_XMIT_DATA_REQUEST, DLQ_REGISTER_CALLSIGN, DLQ_UNREGISTER_CALLSIGN, DLQ_CHANNEL_BUSY, DLQ_SEIZE_CONFIRM, DLQ_CLIENT_CLEANUP} dlq_type_t;
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/* A queue item. */
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// TODO: call this event rather than item.
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// TODO: should add fences.
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typedef struct dlq_item_s {
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struct dlq_item_s *nextp; /* Next item in queue. */
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dlq_type_t type; /* Type of item. */
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/* See enum definition above. */
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int chan; /* Radio channel of origin. */
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// I'm not worried about amount of memory used but this might be a
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// little clearer if a union was used for the different event types.
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// Used for received frame.
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int subchan; /* Winning "subchannel" when using multiple */
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/* decoders on one channel. */
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/* Special case, -1 means DTMF decoder. */
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/* Maybe we should have a different type in this case? */
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int slice; /* Winning slicer. */
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packet_t pp; /* Pointer to frame structure. */
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alevel_t alevel; /* Audio level. */
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retry_t retries; /* Effort expended to get a valid CRC. */
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char spectrum[MAX_SUBCHANS*MAX_SLICERS+1]; /* "Spectrum" display for multi-decoders. */
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// Used by requests from a client application, connect, etc.
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char addrs[AX25_MAX_ADDRS][AX25_MAX_ADDR_LEN];
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int num_addr; /* Range 2 .. 10. */
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int client;
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// Used only by client request to transmit connected data.
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cdata_t *txdata;
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// Used for channel activity change.
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// It is useful to know when the channel is busy either for carrier detect
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// or when we are transmitting.
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int activity; /* OCTYPE_PTT for my transmission start/end. */
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/* OCTYPE_DCD if we hear someone else. */
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int status; /* 1 for active or 0 for quiet. */
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} dlq_item_t;
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void dlq_init (void);
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void dlq_rec_frame (int chan, int subchan, int slice, packet_t pp, alevel_t alevel, retry_t retries, char *spectrum);
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void dlq_connect_request (char addrs[AX25_MAX_ADDRS][AX25_MAX_ADDR_LEN], int num_addr, int chan, int client, int pid);
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void dlq_disconnect_request (char addrs[AX25_MAX_ADDRS][AX25_MAX_ADDR_LEN], int num_addr, int chan, int client);
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void dlq_xmit_data_request (char addrs[AX25_MAX_ADDRS][AX25_MAX_ADDR_LEN], int num_addr, int chan, int client, int pid, char *xdata_ptr, int xdata_len);
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void dlq_register_callsign (char addr[AX25_MAX_ADDR_LEN], int chan, int client);
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void dlq_unregister_callsign (char addr[AX25_MAX_ADDR_LEN], int chan, int client);
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void dlq_channel_busy (int chan, int activity, int status);
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void dlq_seize_confirm (int chan);
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void dlq_client_cleanup (int client);
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int dlq_wait_while_empty (double timeout_val);
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struct dlq_item_s *dlq_remove (void);
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void dlq_delete (struct dlq_item_s *pitem);
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cdata_t *cdata_new (int pid, char *data, int len);
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void cdata_delete (cdata_t *txdata);
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void cdata_check_leak (void);
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#endif
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/* end dlq.h */
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