nginx 0.7.63 *) Security: now "/../" are disabled in "Destination" request header line. *) Change: minimum supported OpenSSL version is 0.9.7. *) Change: the "ask" parameter of the "ssl_verify_client" directive was changed to the "optional" parameter and now it checks a client certificate if it was offered. Thanks to Brice Figureau. *) Feature: now the "-V" switch shows TLS SNI support. *) Feature: the $ssl_client_verify variable. Thanks to Brice Figureau. *) Feature: the "ssl_crl" directive. Thanks to Brice Figureau. *) Bugfix: the $ssl_client_cert variable usage corrupted memory; the bug had appeared in 0.7.7. Thanks to Sergey Zhuravlev. *) Feature: now the start cache loader runs in a separate process; this should improve large caches handling. *) Feature: now temporary files and permanent storage area may reside at different file systems. *) Bugfix: nginx counted incorrectly disk cache size. *) Change: now directive "gzip_disable msie6" does not disable gzipping for MSIE 6.0 SV1. *) Bugfix: nginx always added "Vary: Accept-Encoding" response header line, if both "gzip_static" and "gzip_vary" were on. *) Feature: the "proxy" parameter of the "geo" directive. *) Feature: the ngx_http_geoip_module. *) Feature: the "limit_rate_after" directive. Thanks to Ivan Debnar. *) Feature: the "limit_req_log_level" and "limit_conn_log_level" directives. *) Bugfix: now "limit_req" directive conforms to the leaky bucket algorithm. Thanks to Maxim Dounin. *) Bugfix: in ngx_http_limit_req_module. Thanks to Maxim Dounin. *) Bugfix: now nginx allows underscores in a request method. *) Bugfix: "proxy_pass_header" and "fastcgi_pass_header" directives did not pass to a client the "X-Accel-Redirect", "X-Accel-Limit-Rate", "X-Accel-Buffering", and "X-Accel-Charset" lines from backend response header. Thanks to Maxim Dounin. *) Bugfix: in handling "Last-Modified" and "Accept-Ranges" backend response header lines; the bug had appeared in 0.7.44. Thanks to Maxim Dounin. *) Feature: the "image_filter_transparency" directive. *) Feature: the "image_filter" directive supports variables for setting size. *) Bugfix: in PNG alpha-channel support in the ngx_http_image_filter_module. *) Bugfix: in transparency support in the ngx_http_image_filter_module. *) Feature: now several "perl_modules" directives may be used. *) Bugfix: ngx_http_perl_module responses did not work in subrequests. *) Bugfix: nginx sent '\0' in a "Location" response header line on MKCOL request. Thanks to Xie Zhenye. *) Bugfix: an "error_page" directive did not redirect a 413 error; the bug had appeared in 0.6.10. *) Bugfix: in memory allocation error handling. Thanks to Maxim Dounin and Kirill A. Korinskiy.

/*
 * Copyright (C) Igor Sysoev
 */


#ifndef _NGX_HASH_H_INCLUDED_
#define _NGX_HASH_H_INCLUDED_


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


typedef struct {
    void             *value;
    u_char            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_ */