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/*
* Copyright (C) Andrew Clayton
* Copyright (C) F5, Inc.
*/
#ifndef _NXT_WASM_H_INCLUDED_
#define _NXT_WASM_H_INCLUDED_
#include <stddef.h>
#include <stdint.h>
#include <nxt_unit.h>
#if defined(NXT_HAVE_WASM_WASMTIME)
#include <wasm.h>
#include <wasmtime.h>
#elif defined(NXT_HAVE_WASM_WAMR)
#include <wasm_export.h>
#endif
#define NXT_WASM_PAGE_SIZE (64 * 1024)
#define NXT_WASM_MEM_SIZE (32UL * 1024 * 1024)
#if defined(NXT_HAVE_WASM_WASMTIME)
typedef wasmtime_func_t nxt_wasm_func_t;
#elif defined(NXT_HAVE_WASM_WAMR)
typedef wasm_function_inst_t nxt_wasm_func_t;
#endif
typedef struct nxt_wasm_http_field_s nxt_wasm_http_field_t;
typedef struct nxt_wasm_request_s nxt_wasm_request_t;
typedef struct nxt_wasm_response_s nxt_wasm_response_t;
typedef struct nxt_wasm_response_fields_s nxt_wasm_response_fields_t;
typedef enum nxt_wasm_fh_e nxt_wasm_fh_t;
typedef struct nxt_wasm_func_handler_s nxt_wasm_func_handler_t;
typedef struct nxt_wasm_ctx_s nxt_wasm_ctx_t;
typedef struct nxt_wasm_operations_s nxt_wasm_operations_t;
struct nxt_wasm_http_field_s {
uint32_t name_off;
uint32_t name_len;
uint32_t value_off;
uint32_t value_len;
};
struct nxt_wasm_request_s {
uint32_t method_off;
uint32_t method_len;
uint32_t version_off;
uint32_t version_len;
uint32_t path_off;
uint32_t path_len;
uint32_t query_off;
uint32_t query_len;
uint32_t remote_off;
uint32_t remote_len;
uint32_t local_addr_off;
uint32_t local_addr_len;
uint32_t local_port_off;
uint32_t local_port_len;
uint32_t server_name_off;
uint32_t server_name_len;
uint64_t content_len;
uint64_t total_content_sent;
uint32_t content_sent;
uint32_t content_off;
uint32_t request_size;
uint32_t nfields;
uint32_t tls;
char __pad[4];
nxt_wasm_http_field_t fields[];
};
struct nxt_wasm_response_s {
uint32_t size;
uint8_t data[];
};
struct nxt_wasm_response_fields_s {
uint32_t nfields;
nxt_wasm_http_field_t fields[];
};
enum nxt_wasm_fh_e {
NXT_WASM_FH_REQUEST = 0,
NXT_WASM_FH_MALLOC,
NXT_WASM_FH_FREE,
/* Optional handlers */
NXT_WASM_FH_MODULE_INIT,
NXT_WASM_FH_MODULE_END,
NXT_WASM_FH_REQUEST_INIT,
NXT_WASM_FH_REQUEST_END,
NXT_WASM_FH_RESPONSE_END,
NXT_WASM_FH_NR
};
struct nxt_wasm_func_handler_s {
const char *func_name;
nxt_wasm_func_t func;
};
struct nxt_wasm_ctx_s {
const char *module_path;
nxt_wasm_func_handler_t fh[NXT_WASM_FH_NR];
char **dirs;
size_t nr_dirs;
nxt_unit_request_info_t *req;
uint8_t *baddr;
size_t baddr_off;
size_t response_off;
uint16_t status;
};
struct nxt_wasm_operations_s {
int (*init)(nxt_wasm_ctx_t *ctx);
void (*destroy)(const nxt_wasm_ctx_t *ctx);
int (*exec_request)(const nxt_wasm_ctx_t *ctx);
void (*exec_hook)(const nxt_wasm_ctx_t *ctx, nxt_wasm_fh_t hook);
};
extern const nxt_wasm_operations_t nxt_wasm_ops;
/* Exported to the WASM module */
extern void nxt_wasm_do_response_end(nxt_wasm_ctx_t *ctx);
extern void nxt_wasm_do_send_response(nxt_wasm_ctx_t *ctx, uint32_t offset);
extern void nxt_wasm_do_send_headers(nxt_wasm_ctx_t *ctx, uint32_t offset);
#endif /* _NXT_WASM_H_INCLUDED_ */
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