/* SPDX-License-Identifier: Apache-2.0 */
/*
* Copyright (C) Andrew Clayton
* Copyright (C) F5, Inc.
*/
#ifndef _UNIT_WASM_H_
#define _UNIT_WASM_H_
#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
#ifdef __cplusplus
extern "C" {
#endif
#define LUW_VERSION_MAJOR 0
#define LUW_VERSION_MINOR 1
#define LUW_VERSION_PATCH 0
/* Version number in hex 0xMMmmpp00 */
#define LUW_VERSION_NUMBER \
( (LUW_VERSION_MAJOR << 24) | \
(LUW_VERSION_MINOR << 16) | \
(LUW_VERSION_PATCH << 8) )
#define __luw_export_name(name) __attribute__((export_name(name)))
#define __luw_unused __attribute__((unused))
#define __luw_maybe_unused __luw_unused
typedef uint64_t u64;
typedef int64_t s64;
typedef uint32_t u32;
typedef int32_t s32;
typedef uint16_t u16;
typedef int16_t s16;
typedef uint8_t u8;
typedef int8_t s8;
struct luw_hdr_field {
u32 name_off;
u32 name_len;
u32 value_off;
u32 value_len;
};
struct luw_req {
u32 method_off;
u32 method_len;
u32 version_off;
u32 version_len;
u32 path_off;
u32 path_len;
u32 query_off;
u32 query_len;
u32 remote_off;
u32 remote_len;
u32 local_addr_off;
u32 local_addr_len;
u32 local_port_off;
u32 local_port_len;
u32 server_name_off;
u32 server_name_len;
u32 content_off;
u32 content_len;
u32 content_sent;
u32 total_content_sent;
u32 request_size;
u32 nr_fields;
u32 tls;
struct luw_hdr_field fields[];
};
struct luw_resp {
u32 size;
u8 data[];
};
struct luw_resp_hdr {
u32 nr_fields;
struct luw_hdr_field fields[];
};
typedef struct {
/* pointer to the shared memory */
u8 *addr;
/* points to the end of ctx->resp->data */
u8 *mem;
/* struct luw_req representation of the shared memory */
struct luw_req *req;
/* struct luw_resp representation of the shared memory */
struct luw_resp *resp;
/* struct luw_resp_hdr represnetation of the shared memory */
struct luw_resp_hdr *resp_hdr;
/* offset to where the struct resp starts in the shared memory */
size_t resp_offset;
/* points to the external buffer used for a copy of the request */
u8 *req_buf;
/* points to the end of the fields array in struct luw_resp_hdr */
u8 *hdrp;
/* points to the end of ctx->req_buf */
u8 *reqp;
/* tracks the response header index number */
s32 resp_hdr_idx;
} luw_ctx_t;
typedef enum {
LUW_SRB_NONE = 0x00,
LUW_SRB_APPEND = 0x01,
LUW_SRB_ALLOC = 0x02,
LUW_SRB_FULL_SIZE = 0x04,
LUW_SRB_FLAGS_ALL = (LUW_SRB_NONE|LUW_SRB_APPEND|LUW_SRB_ALLOC|
LUW_SRB_FULL_SIZE)
} luw_srb_flags_t;
typedef struct luw_hdr_field luw_http_hdr_iter_t;
#define luw_foreach_http_hdr(ctx, iter, name, value) \
for (iter = ctx.req->fields, \
name = (const char *)ctx.req + iter->name_off; \
(iter < (ctx.req->fields + ctx.req->nr_fields)) && \
(value = (const char *)ctx.req + iter->value_off); \
iter++, name = (const char *)ctx.req + iter->name_off)
/* Imported functions from the host/runtime */
__attribute__((import_module("env"), import_name("nxt_wasm_get_init_mem_size")))
u32 nxt_wasm_get_init_mem_size(void);
__attribute__((import_module("env"), import_name("nxt_wasm_response_end")))
void nxt_wasm_response_end(void);
__attribute__((import_module("env"), import_name("nxt_wasm_send_headers")))
void nxt_wasm_send_headers(u32 offset);
__attribute__((import_module("env"), import_name("nxt_wasm_send_response")))
void nxt_wasm_send_response(u32 offset);
extern void luw_module_init_handler(void);
extern void luw_module_end_handler(void);
extern void luw_request_init_handler(void);
extern void luw_request_end_handler(void);
extern void luw_response_end_handler(void);
extern int luw_request_handler(u8 *addr);
extern void luw_free_handler(u32 addr);
extern u32 luw_malloc_handler(size_t size);
#pragma GCC visibility push(default)
extern void luw_init_ctx(luw_ctx_t *ctx, u8 *addr, size_t offset);
extern int luw_set_req_buf(luw_ctx_t *ctx, u8 **buf, unsigned int flags);
extern const char *luw_get_http_path(const luw_ctx_t *ctx);
extern const char *luw_get_http_method(const luw_ctx_t *ctx);
extern const char *luw_get_http_version(const luw_ctx_t *ctx);
extern const char *luw_get_http_query(const luw_ctx_t *ctx);
extern const char *luw_get_http_remote(const luw_ctx_t *ctx);
extern const char *luw_get_http_local_addr(const luw_ctx_t *ctx);
extern const char *luw_get_http_local_port(const luw_ctx_t *ctx);
extern const char *luw_get_http_server_name(const luw_ctx_t *ctx);
extern const u8 *luw_get_http_content(const luw_ctx_t *ctx);
extern size_t luw_get_http_content_len(const luw_ctx_t *ctx);
extern size_t luw_get_http_content_sent(const luw_ctx_t *ctx);
extern bool luw_http_is_tls(const luw_ctx_t *ctx);
extern void luw_http_hdr_iter(luw_ctx_t *ctx,
bool (*luw_http_hdr_iter_func)(luw_ctx_t *ctx,
const char *name,
const char *value,
void *data),
void *user_data);
extern const char *luw_http_hdr_get_value(luw_ctx_t *ctx, const char *hdr);
extern size_t luw_get_response_data_size(const luw_ctx_t *ctx);
extern int luw_mem_writep(luw_ctx_t *ctx, const char *fmt, ...);
extern size_t luw_mem_writep_data(luw_ctx_t *ctx, const u8 *src, size_t size);
extern void luw_req_buf_append(luw_ctx_t *ctx, const u8 *src);
extern size_t luw_mem_fill_buf_from_req(luw_ctx_t *ctx, size_t from);
extern void luw_mem_reset(luw_ctx_t *ctx);
extern void luw_http_send_response(const luw_ctx_t *ctx);
extern void luw_http_init_headers(luw_ctx_t *ctx, size_t nr, size_t offset);
extern void luw_http_add_header(luw_ctx_t *ctx, const char *name,
const char *value);
extern void luw_http_send_headers(const luw_ctx_t *ctx);
extern void luw_http_response_end(void);
extern u32 luw_mem_get_init_size(void);
/*
* Convenience wrappers for the Rust bindings, not for general consumption.
*/
extern void *luw_malloc(size_t size);
extern void luw_free(void *ptr);
#pragma GCC visibility pop
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* _UNIT_WASM_H_ */
