kopia lustrzana https://github.com/markqvist/LibAPRS
71 wiersze
1.6 KiB
C
71 wiersze
1.6 KiB
C
#ifndef PROTOCOL_AX25_H
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#define PROTOCOL_AX25_H
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#include <stdio.h>
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#include <stdbool.h>
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#include "device.h"
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#define AX25_MIN_FRAME_LEN 18
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#ifndef CUSTOM_FRAME_SIZE
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#define AX25_MAX_FRAME_LEN 330
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#else
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#define AX25_MAX_FRAME_LEN CUSTOM_FRAME_SIZE
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#endif
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#define AX25_CRC_CORRECT 0xF0B8
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#define AX25_CTRL_UI 0x03
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#define AX25_PID_NOLAYER3 0xF0
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struct AX25Ctx; // Forward declarations
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struct AX25Msg;
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typedef void (*ax25_callback_t)(struct AX25Msg *msg);
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typedef struct AX25Ctx {
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uint8_t buf[AX25_MAX_FRAME_LEN];
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FILE *ch;
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size_t frame_len;
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uint16_t crc_in;
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uint16_t crc_out;
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ax25_callback_t hook;
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bool sync;
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bool escape;
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} AX25Ctx;
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#define AX25_CALL(str, id) {.call = (str), .ssid = (id) }
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#define AX25_MAX_RPT 8
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#define AX25_REPEATED(msg, n) ((msg)->rpt_flags & BV(n))
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#define CALL_OVERSPACE 1
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typedef struct AX25Call {
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char call[6+CALL_OVERSPACE];
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//char STRING_TERMINATION = 0;
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uint8_t ssid;
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} AX25Call;
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typedef struct AX25Msg {
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AX25Call src;
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AX25Call dst;
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AX25Call rpt_list[AX25_MAX_RPT];
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uint8_t rpt_count;
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uint8_t rpt_flags;
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uint16_t ctrl;
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uint8_t pid;
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const uint8_t *info;
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size_t len;
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} AX25Msg;
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void ax25_sendVia(AX25Ctx *ctx, const AX25Call *path, size_t path_len, const void *_buf, size_t len);
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#define ax25_send(ctx, dst, src, buf, len) ax25_sendVia(ctx, ({static AX25Call __path[]={dst, src}; __path;}), 2, buf, len)
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void ax25_poll(AX25Ctx *ctx);
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void ax25_sendRaw(AX25Ctx *ctx, void *_buf, size_t len);
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void ax25_init(AX25Ctx *ctx, ax25_callback_t hook);
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#endif
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