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/*
* Copyright (C) F5, Inc.
*/
#ifndef _NXT_OTEL_H_INCLUDED_
#define _NXT_OTEL_H_INCLUDED_
#include <nxt_router.h>
#include <nxt_string.h>
#if (NXT_HAVE_OTEL)
#define NXT_OTEL_TRACE() nxt_otel_test_and_call_state(task, r)
#else
#define NXT_OTEL_TRACE()
#endif
#if (NXT_HAVE_OTEL)
extern void nxt_otel_rs_send_trace(void *trace);
extern void * nxt_otel_rs_get_or_create_trace(u_char *trace_id);
extern void nxt_otel_rs_init(
void (*log_callback)(nxt_uint_t log_level, const char *log_string),
const nxt_str_t *endpoint, const nxt_str_t *protocol,
double sample_fraction, double batch_size);
extern void nxt_otel_rs_copy_traceparent(u_char *buffer, void *span);
extern void nxt_otel_rs_add_event_to_trace(void *trace, nxt_str_t *key,
nxt_str_t *val);
extern uint8_t nxt_otel_rs_is_init(void);
extern void nxt_otel_rs_uninit(void);
#endif
typedef enum nxt_otel_status_e nxt_otel_status_t;
typedef struct nxt_otel_state_s nxt_otel_state_t;
/*
* nxt_otel_status_t
* more efficient than a single handler state struct
*/
enum nxt_otel_status_e {
NXT_OTEL_UNINIT_STATE = 0,
NXT_OTEL_INIT_STATE,
NXT_OTEL_HEADER_STATE,
NXT_OTEL_BODY_STATE,
NXT_OTEL_COLLECT_STATE,
NXT_OTEL_ERROR_STATE,
};
/*
* nxt_otel_state_t
* cache of trace data needed per request and
* includes indicator as to current flow state
*/
struct nxt_otel_state_s {
u_char *trace_id;
u_char *version;
u_char *parent_id;
u_char *trace_flags;
void *trace;
nxt_otel_status_t status;
nxt_str_t trace_state;
};
nxt_int_t nxt_otel_parse_traceparent(void *ctx, nxt_http_field_t *field,
uintptr_t data);
nxt_int_t nxt_otel_parse_tracestate(void *ctx, nxt_http_field_t *field,
uintptr_t data);
void nxt_otel_log_callback(nxt_uint_t log_level, const char *arg);
void nxt_otel_test_and_call_state(nxt_task_t *task, nxt_http_request_t *r);
void nxt_otel_request_error_path(nxt_task_t *task, nxt_http_request_t *r);
#endif /* _NXT_OTEL_H_INCLUDED_ */
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