88 lines
2.0 KiB
C
88 lines
2.0 KiB
C
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/* ax25_link.h */
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#ifndef AX25_LINK_H
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#define AX25_LINK_H 1
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#include "ax25_pad.h" // for AX25_MAX_INFO_LEN
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#include "dlq.h" // for dlq_item_t
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#include "config.h" // for struct misc_config_s
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// Limits and defaults for parameters.
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#define AX25_N1_PACLEN_MIN 1 // Max bytes in Information part of frame.
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#define AX25_N1_PACLEN_DEFAULT 256 // some v2.0 implementations have 128
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#define AX25_N1_PACLEN_MAX AX25_MAX_INFO_LEN // from ax25_pad.h
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#define AX25_N2_RETRY_MIN 1 // Number of times to retry before giving up.
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#define AX25_N2_RETRY_DEFAULT 10
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#define AX25_N2_RETRY_MAX 15
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#define AX25_T1V_FRACK_MIN 1 // Number of seconds to wait before retrying.
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#define AX25_T1V_FRACK_DEFAULT 3 // KPC-3+ has 4. TM-D710A has 3.
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#define AX25_T1V_FRACK_MAX 15
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#define AX25_K_MAXFRAME_BASIC_MIN 1 // Window size - number of I frames to send before waiting for ack.
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#define AX25_K_MAXFRAME_BASIC_DEFAULT 4
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#define AX25_K_MAXFRAME_BASIC_MAX 7
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#define AX25_K_MAXFRAME_EXTENDED_MIN 1
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#define AX25_K_MAXFRAME_EXTENDED_DEFAULT 32
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#define AX25_K_MAXFRAME_EXTENDED_MAX 63 // In theory 127 but I'm restricting as explained in SREJ handling.
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// Call once at startup time.
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void ax25_link_init (struct misc_config_s *pconfig);
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// IMPORTANT:
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// These functions must be called on a single thread, one at a time.
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// The Data Link Queue (DLQ) is used to serialize events from multiple sources.
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// Maybe the dispatch switch should be moved to ax25_link.c so they can all
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// be made static and they can't be called from the wrong place accidentally.
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void dl_connect_request (dlq_item_t *E);
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void dl_disconnect_request (dlq_item_t *E);
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void dl_data_request (dlq_item_t *E);
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void dl_register_callsign (dlq_item_t *E);
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void dl_unregister_callsign (dlq_item_t *E);
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void dl_outstanding_frames_request (dlq_item_t *E);
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void dl_client_cleanup (dlq_item_t *E);
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void lm_data_indication (dlq_item_t *E);
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void lm_seize_confirm (dlq_item_t *E);
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void lm_channel_busy (dlq_item_t *E);
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void dl_timer_expiry (void);
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double ax25_link_get_next_timer_expiry (void);
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#endif
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/* end ax25_link.h */
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