view src/core/ngx_hash.h @ 7731:fd0b2226919b

Stream: proxy_ssl_conf_command directive. Similarly to ssl_conf_command, proxy_ssl_conf_command can be used to set arbitrary OpenSSL configuration parameters as long as nginx is compiled with OpenSSL 1.0.2 or later, when connecting to upstream servers with SSL. Full list of available configuration commands can be found in the SSL_CONF_cmd manual page (https://www.openssl.org/docs/man1.1.1/man3/SSL_CONF_cmd.html).
author Maxim Dounin <mdounin@mdounin.ru>
date Thu, 22 Oct 2020 18:00:27 +0300
parents d620f497c50f
children f8f6b9fee66a
line wrap: on
line source


/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_HASH_H_INCLUDED_
#define _NGX_HASH_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>


typedef struct {
    void             *value;
    u_short           len;
    u_char            name[1];
} ngx_hash_elt_t;


typedef struct {
    ngx_hash_elt_t  **buckets;
    ngx_uint_t        size;
} ngx_hash_t;


typedef struct {
    ngx_hash_t        hash;
    void             *value;
} ngx_hash_wildcard_t;


typedef struct {
    ngx_str_t         key;
    ngx_uint_t        key_hash;
    void             *value;
} ngx_hash_key_t;


typedef ngx_uint_t (*ngx_hash_key_pt) (u_char *data, size_t len);


typedef struct {
    ngx_hash_t            hash;
    ngx_hash_wildcard_t  *wc_head;
    ngx_hash_wildcard_t  *wc_tail;
} ngx_hash_combined_t;


typedef struct {
    ngx_hash_t       *hash;
    ngx_hash_key_pt   key;

    ngx_uint_t        max_size;
    ngx_uint_t        bucket_size;

    char             *name;
    ngx_pool_t       *pool;
    ngx_pool_t       *temp_pool;
} ngx_hash_init_t;


#define NGX_HASH_SMALL            1
#define NGX_HASH_LARGE            2

#define NGX_HASH_LARGE_ASIZE      16384
#define NGX_HASH_LARGE_HSIZE      10007

#define NGX_HASH_WILDCARD_KEY     1
#define NGX_HASH_READONLY_KEY     2


typedef struct {
    ngx_uint_t        hsize;

    ngx_pool_t       *pool;
    ngx_pool_t       *temp_pool;

    ngx_array_t       keys;
    ngx_array_t      *keys_hash;

    ngx_array_t       dns_wc_head;
    ngx_array_t      *dns_wc_head_hash;

    ngx_array_t       dns_wc_tail;
    ngx_array_t      *dns_wc_tail_hash;
} ngx_hash_keys_arrays_t;


typedef struct {
    ngx_uint_t        hash;
    ngx_str_t         key;
    ngx_str_t         value;
    u_char           *lowcase_key;
} ngx_table_elt_t;


void *ngx_hash_find(ngx_hash_t *hash, ngx_uint_t key, u_char *name, size_t len);
void *ngx_hash_find_wc_head(ngx_hash_wildcard_t *hwc, u_char *name, size_t len);
void *ngx_hash_find_wc_tail(ngx_hash_wildcard_t *hwc, u_char *name, size_t len);
void *ngx_hash_find_combined(ngx_hash_combined_t *hash, ngx_uint_t key,
    u_char *name, size_t len);

ngx_int_t ngx_hash_init(ngx_hash_init_t *hinit, ngx_hash_key_t *names,
    ngx_uint_t nelts);
ngx_int_t ngx_hash_wildcard_init(ngx_hash_init_t *hinit, ngx_hash_key_t *names,
    ngx_uint_t nelts);

#define ngx_hash(key, c)   ((ngx_uint_t) key * 31 + c)
ngx_uint_t ngx_hash_key(u_char *data, size_t len);
ngx_uint_t ngx_hash_key_lc(u_char *data, size_t len);
ngx_uint_t ngx_hash_strlow(u_char *dst, u_char *src, size_t n);


ngx_int_t ngx_hash_keys_array_init(ngx_hash_keys_arrays_t *ha, ngx_uint_t type);
ngx_int_t ngx_hash_add_key(ngx_hash_keys_arrays_t *ha, ngx_str_t *key,
    void *value, ngx_uint_t flags);


#endif /* _NGX_HASH_H_INCLUDED_ */