94 lines
1.5 KiB
C
94 lines
1.5 KiB
C
#pragma once
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#include <stdint.h>
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#include <unistd.h>
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//////// peer
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// All specific peer structs must be castable to this.
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struct peer {
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enum peer_type {
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PEER_BACKEND,
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PEER_CLIENT,
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} type;
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};
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//////// buf
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#define BUF_LEN_MAX 256
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struct buf {
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char buf[BUF_LEN_MAX];
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size_t start;
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size_t length;
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};
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#define BUF_INIT { \
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.start = 0, \
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.length = 0, \
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}
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#define buf_chr(buff, at) ((buff)->buf[(buff)->start + (at)])
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#define buf_at(buff, at) (&buf_chr(buff, at))
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void buf_init(struct buf *);
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ssize_t buf_fill(struct buf *, int);
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void buf_consume(struct buf *, size_t);
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//////// packet
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#define DATA_LEN_MAX 14
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struct backend;
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struct packet {
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enum {
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MODE_AC,
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MODE_S_SHORT,
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MODE_S_LONG,
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} type;
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uint8_t payload[DATA_LEN_MAX];
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uint64_t mlat_timestamp;
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uint32_t rssi;
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struct backend *backend;
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};
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//////// mlat
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#define MLAT_MHZ 120
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// Use the signed max to avoid problems with some consumers; it's large enough to not matter.
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#define MLAT_MAX INT64_MAX
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#define RSSI_MAX UINT32_MAX
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struct mlat_state {
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uint64_t timestamp_last;
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uint64_t timestamp_generation;
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};
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uint64_t mlat_timestamp_scale_in(uint64_t, uint64_t, uint16_t, struct mlat_state *);
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//////// rssi
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uint32_t rssi_scale_in(uint32_t, uint32_t);
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//////// hex
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void hex_init();
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void hex_to_bin(uint8_t *, char *, size_t);
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uint64_t hex_to_int(char *, size_t);
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void hex_from_bin(char *, uint8_t *, size_t);
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///////// uuid
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#define UUID_LEN 37
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void uuid_gen(char *);
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///////// server
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extern char server_id[];
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void server_init();
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