Renamed ngx_http_limit_zone_module to ngx_http_limit_conn_module.

1 files changed, 0 insertions, 751 deletions

diff --git a/src/http/modules/ngx_http_limit_zone_module.c b/src/http/modules/ngx_http_limit_zone_module.c
deleted file mode 100644
index 1dda9f45d..000000000
--- a/src/http/modules/ngx_http_limit_zone_module.c
+++ /dev/null
@@ -1,751 +0,0 @@
-
-/*
- * Copyright (C) Igor Sysoev
- */
-
-
-#include <ngx_config.h>
-#include <ngx_core.h>
-#include <ngx_http.h>
-
-
-typedef struct {
-    u_char              color;
-    u_char              len;
-    u_short             conn;
-    u_char              data[1];
-} ngx_http_limit_zone_node_t;
-
-
-typedef struct {
-    ngx_shm_zone_t     *shm_zone;
-    ngx_rbtree_node_t  *node;
-} ngx_http_limit_zone_cleanup_t;
-
-
-typedef struct {
-    ngx_rbtree_t       *rbtree;
-    ngx_int_t           index;
-    ngx_str_t           var;
-} ngx_http_limit_zone_ctx_t;
-
-
-typedef struct {
-    ngx_shm_zone_t     *shm_zone;
-    ngx_uint_t          conn;
-} ngx_http_limit_zone_limit_t;
-
-
-typedef struct {
-    ngx_array_t         limits;
-    ngx_uint_t          log_level;
-} ngx_http_limit_zone_conf_t;
-
-
-static ngx_rbtree_node_t *ngx_http_limit_zone_lookup(ngx_rbtree_t *rbtree,
-    ngx_http_variable_value_t *vv, uint32_t hash);
-static void ngx_http_limit_zone_cleanup(void *data);
-static ngx_inline void ngx_http_limit_zone_cleanup_all(ngx_pool_t *pool);
-
-static void *ngx_http_limit_zone_create_conf(ngx_conf_t *cf);
-static char *ngx_http_limit_zone_merge_conf(ngx_conf_t *cf, void *parent,
-    void *child);
-static char *ngx_http_limit_conn_zone(ngx_conf_t *cf, ngx_command_t *cmd,
-    void *conf);
-static char *ngx_http_limit_zone(ngx_conf_t *cf, ngx_command_t *cmd,
-    void *conf);
-static char *ngx_http_limit_conn(ngx_conf_t *cf, ngx_command_t *cmd,
-    void *conf);
-static ngx_int_t ngx_http_limit_zone_init(ngx_conf_t *cf);
-
-
-static ngx_conf_deprecated_t  ngx_conf_deprecated_limit_zone = {
-    ngx_conf_deprecated, "limit_zone", "limit_conn_zone"
-};
-
-
-static ngx_conf_enum_t  ngx_http_limit_conn_log_levels[] = {
-    { ngx_string("info"), NGX_LOG_INFO },
-    { ngx_string("notice"), NGX_LOG_NOTICE },
-    { ngx_string("warn"), NGX_LOG_WARN },
-    { ngx_string("error"), NGX_LOG_ERR },
-    { ngx_null_string, 0 }
-};
-
-
-static ngx_command_t  ngx_http_limit_zone_commands[] = {
-
-    { ngx_string("limit_conn_zone"),
-      NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE2,
-      ngx_http_limit_conn_zone,
-      0,
-      0,
-      NULL },
-
-    { ngx_string("limit_zone"),
-      NGX_HTTP_MAIN_CONF|NGX_CONF_TAKE3,
-      ngx_http_limit_zone,
-      0,
-      0,
-      NULL },
-
-    { ngx_string("limit_conn"),
-      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
-      ngx_http_limit_conn,
-      NGX_HTTP_LOC_CONF_OFFSET,
-      0,
-      NULL },
-
-    { ngx_string("limit_conn_log_level"),
-      NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
-      ngx_conf_set_enum_slot,
-      NGX_HTTP_LOC_CONF_OFFSET,
-      offsetof(ngx_http_limit_zone_conf_t, log_level),
-      &ngx_http_limit_conn_log_levels },
-
-      ngx_null_command
-};
-
-
-static ngx_http_module_t  ngx_http_limit_zone_module_ctx = {
-    NULL,                                  /* preconfiguration */
-    ngx_http_limit_zone_init,              /* postconfiguration */
-
-    NULL,                                  /* create main configuration */
-    NULL,                                  /* init main configuration */
-
-    NULL,                                  /* create server configuration */
-    NULL,                                  /* merge server configuration */
-
-    ngx_http_limit_zone_create_conf,       /* create location configration */
-    ngx_http_limit_zone_merge_conf         /* merge location configration */
-};
-
-
-ngx_module_t  ngx_http_limit_zone_module = {
-    NGX_MODULE_V1,
-    &ngx_http_limit_zone_module_ctx,       /* module context */
-    ngx_http_limit_zone_commands,          /* module directives */
-    NGX_HTTP_MODULE,                       /* module type */
-    NULL,                                  /* init master */
-    NULL,                                  /* init module */
-    NULL,                                  /* init process */
-    NULL,                                  /* init thread */
-    NULL,                                  /* exit thread */
-    NULL,                                  /* exit process */
-    NULL,                                  /* exit master */
-    NGX_MODULE_V1_PADDING
-};
-
-
-static ngx_int_t
-ngx_http_limit_zone_handler(ngx_http_request_t *r)
-{
-    size_t                          len, n;
-    uint32_t                        hash;
-    ngx_uint_t                      i;
-    ngx_slab_pool_t                *shpool;
-    ngx_rbtree_node_t              *node;
-    ngx_pool_cleanup_t             *cln;
-    ngx_http_variable_value_t      *vv;
-    ngx_http_limit_zone_ctx_t      *ctx;
-    ngx_http_limit_zone_node_t     *lz;
-    ngx_http_limit_zone_conf_t     *lzcf;
-    ngx_http_limit_zone_limit_t    *limits;
-    ngx_http_limit_zone_cleanup_t  *lzcln;
-
-    if (r->main->limit_zone_set) {
-        return NGX_DECLINED;
-    }
-
-    lzcf = ngx_http_get_module_loc_conf(r, ngx_http_limit_zone_module);
-    limits = lzcf->limits.elts;
-
-    r->main->limit_zone_set = 1;
-
-    for (i = 0; i < lzcf->limits.nelts; i++) {
-        ctx = limits[i].shm_zone->data;
-
-        vv = ngx_http_get_indexed_variable(r, ctx->index);
-
-        if (vv == NULL || vv->not_found) {
-            continue;
-        }
-
-        len = vv->len;
-
-        if (len == 0) {
-            continue;
-        }
-
-        if (len > 255) {
-            ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
-                          "the value of the \"%V\" variable "
-                          "is more than 255 bytes: \"%v\"",
-                          &ctx->var, vv);
-            continue;
-        }
-
-        hash = ngx_crc32_short(vv->data, len);
-
-        shpool = (ngx_slab_pool_t *) limits[i].shm_zone->shm.addr;
-
-        ngx_shmtx_lock(&shpool->mutex);
-
-        node = ngx_http_limit_zone_lookup(ctx->rbtree, vv, hash);
-
-        if (node == NULL) {
-
-            n = offsetof(ngx_rbtree_node_t, color)
-                + offsetof(ngx_http_limit_zone_node_t, data)
-                + len;
-
-            node = ngx_slab_alloc_locked(shpool, n);
-
-            if (node == NULL) {
-                ngx_shmtx_unlock(&shpool->mutex);
-                ngx_http_limit_zone_cleanup_all(r->pool);
-                return NGX_HTTP_SERVICE_UNAVAILABLE;
-            }
-
-            lz = (ngx_http_limit_zone_node_t *) &node->color;
-
-            node->key = hash;
-            lz->len = (u_char) len;
-            lz->conn = 1;
-            ngx_memcpy(lz->data, vv->data, len);
-
-            ngx_rbtree_insert(ctx->rbtree, node);
-
-        } else {
-
-            lz = (ngx_http_limit_zone_node_t *) &node->color;
-
-            if ((ngx_uint_t) lz->conn >= limits[i].conn) {
-
-                ngx_shmtx_unlock(&shpool->mutex);
-
-                ngx_log_error(lzcf->log_level, r->connection->log, 0,
-                              "limiting connections by zone \"%V\"",
-                              &limits[i].shm_zone->shm.name);
-
-                ngx_http_limit_zone_cleanup_all(r->pool);
-                return NGX_HTTP_SERVICE_UNAVAILABLE;
-            }
-
-            lz->conn++;
-        }
-
-        ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
-                       "limit zone: %08XD %d", node->key, lz->conn);
-
-        ngx_shmtx_unlock(&shpool->mutex);
-
-        cln = ngx_pool_cleanup_add(r->pool,
-                                   sizeof(ngx_http_limit_zone_cleanup_t));
-        if (cln == NULL) {
-            return NGX_HTTP_INTERNAL_SERVER_ERROR;
-        }
-
-        cln->handler = ngx_http_limit_zone_cleanup;
-        lzcln = cln->data;
-
-        lzcln->shm_zone = limits[i].shm_zone;
-        lzcln->node = node;
-    }
-
-    return NGX_DECLINED;
-}
-
-
-static void
-ngx_http_limit_zone_rbtree_insert_value(ngx_rbtree_node_t *temp,
-    ngx_rbtree_node_t *node, ngx_rbtree_node_t *sentinel)
-{
-    ngx_rbtree_node_t           **p;
-    ngx_http_limit_zone_node_t   *lzn, *lznt;
-
-    for ( ;; ) {
-
-        if (node->key < temp->key) {
-
-            p = &temp->left;
-
-        } else if (node->key > temp->key) {
-
-            p = &temp->right;
-
-        } else { /* node->key == temp->key */
-
-            lzn = (ngx_http_limit_zone_node_t *) &node->color;
-            lznt = (ngx_http_limit_zone_node_t *) &temp->color;
-
-            p = (ngx_memn2cmp(lzn->data, lznt->data, lzn->len, lznt->len) < 0)
-                ? &temp->left : &temp->right;
-        }
-
-        if (*p == sentinel) {
-            break;
-        }
-
-        temp = *p;
-    }
-
-    *p = node;
-    node->parent = temp;
-    node->left = sentinel;
-    node->right = sentinel;
-    ngx_rbt_red(node);
-}
-
-
-static ngx_rbtree_node_t *
-ngx_http_limit_zone_lookup(ngx_rbtree_t *rbtree, ngx_http_variable_value_t *vv,
-    uint32_t hash)
-{
-    ngx_int_t                    rc;
-    ngx_rbtree_node_t           *node, *sentinel;
-    ngx_http_limit_zone_node_t  *lzn;
-
-    node = rbtree->root;
-    sentinel = rbtree->sentinel;
-
-    while (node != sentinel) {
-
-        if (hash < node->key) {
-            node = node->left;
-            continue;
-        }
-
-        if (hash > node->key) {
-            node = node->right;
-            continue;
-        }
-
-        /* hash == node->key */
-
-        do {
-            lzn = (ngx_http_limit_zone_node_t *) &node->color;
-
-            rc = ngx_memn2cmp(vv->data, lzn->data,
-                              (size_t) vv->len, (size_t) lzn->len);
-            if (rc == 0) {
-                return node;
-            }
-
-            node = (rc < 0) ? node->left : node->right;
-
-        } while (node != sentinel && hash == node->key);
-
-        break;
-    }
-
-    return NULL;
-}
-
-
-static void
-ngx_http_limit_zone_cleanup(void *data)
-{
-    ngx_http_limit_zone_cleanup_t  *lzcln = data;
-
-    ngx_slab_pool_t             *shpool;
-    ngx_rbtree_node_t           *node;
-    ngx_http_limit_zone_ctx_t   *ctx;
-    ngx_http_limit_zone_node_t  *lz;
-
-    ctx = lzcln->shm_zone->data;
-    shpool = (ngx_slab_pool_t *) lzcln->shm_zone->shm.addr;
-    node = lzcln->node;
-    lz = (ngx_http_limit_zone_node_t *) &node->color;
-
-    ngx_shmtx_lock(&shpool->mutex);
-
-    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, lzcln->shm_zone->shm.log, 0,
-                   "limit zone cleanup: %08XD %d", node->key, lz->conn);
-
-    lz->conn--;
-
-    if (lz->conn == 0) {
-        ngx_rbtree_delete(ctx->rbtree, node);
-        ngx_slab_free_locked(shpool, node);
-    }
-
-    ngx_shmtx_unlock(&shpool->mutex);
-}
-
-
-static ngx_inline void
-ngx_http_limit_zone_cleanup_all(ngx_pool_t *pool)
-{
-    ngx_pool_cleanup_t  *cln;
-
-    cln = pool->cleanup;
-
-    while (cln && cln->handler == ngx_http_limit_zone_cleanup) {
-        ngx_http_limit_zone_cleanup(cln->data);
-        cln = cln->next;
-    }
-
-    pool->cleanup = cln;
-}
-
-
-static ngx_int_t
-ngx_http_limit_zone_init_zone(ngx_shm_zone_t *shm_zone, void *data)
-{
-    ngx_http_limit_zone_ctx_t  *octx = data;
-
-    size_t                      len;
-    ngx_slab_pool_t            *shpool;
-    ngx_rbtree_node_t          *sentinel;
-    ngx_http_limit_zone_ctx_t  *ctx;
-
-    ctx = shm_zone->data;
-
-    if (octx) {
-        if (ngx_strcmp(ctx->var.data, octx->var.data) != 0) {
-            ngx_log_error(NGX_LOG_EMERG, shm_zone->shm.log, 0,
-                          "limit_conn_zone \"%V\" uses the \"%V\" variable "
-                          "while previously it used the \"%V\" variable",
-                          &shm_zone->shm.name, &ctx->var, &octx->var);
-            return NGX_ERROR;
-        }
-
-        ctx->rbtree = octx->rbtree;
-
-        return NGX_OK;
-    }
-
-    shpool = (ngx_slab_pool_t *) shm_zone->shm.addr;
-
-    if (shm_zone->shm.exists) {
-        ctx->rbtree = shpool->data;
-
-        return NGX_OK;
-    }
-
-    ctx->rbtree = ngx_slab_alloc(shpool, sizeof(ngx_rbtree_t));
-    if (ctx->rbtree == NULL) {
-        return NGX_ERROR;
-    }
-
-    shpool->data = ctx->rbtree;
-
-    sentinel = ngx_slab_alloc(shpool, sizeof(ngx_rbtree_node_t));
-    if (sentinel == NULL) {
-        return NGX_ERROR;
-    }
-
-    ngx_rbtree_init(ctx->rbtree, sentinel,
-                    ngx_http_limit_zone_rbtree_insert_value);
-
-    len = sizeof(" in limit_conn_zone \"\"") + shm_zone->shm.name.len;
-
-    shpool->log_ctx = ngx_slab_alloc(shpool, len);
-    if (shpool->log_ctx == NULL) {
-        return NGX_ERROR;
-    }
-
-    ngx_sprintf(shpool->log_ctx, " in limit_conn_zone \"%V\"%Z",
-                &shm_zone->shm.name);
-
-    return NGX_OK;
-}
-
-
-static void *
-ngx_http_limit_zone_create_conf(ngx_conf_t *cf)
-{
-    ngx_http_limit_zone_conf_t  *conf;
-
-    conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_zone_conf_t));
-    if (conf == NULL) {
-        return NULL;
-    }
-
-    /*
-     * set by ngx_pcalloc():
-     *
-     *     conf->limits.elts = NULL;
-     */
-
-    conf->log_level = NGX_CONF_UNSET_UINT;
-
-    return conf;
-}
-
-
-static char *
-ngx_http_limit_zone_merge_conf(ngx_conf_t *cf, void *parent, void *child)
-{
-    ngx_http_limit_zone_conf_t *prev = parent;
-    ngx_http_limit_zone_conf_t *conf = child;
-
-    if (conf->limits.elts == NULL) {
-        *conf = *prev;
-    }
-
-    ngx_conf_merge_uint_value(conf->log_level, prev->log_level, NGX_LOG_ERR);
-
-    return NGX_CONF_OK;
-}
-
-
-static char *
-ngx_http_limit_conn_zone(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
-{
-    u_char                     *p;
-    ssize_t                     size;
-    ngx_str_t                  *value, name, s;
-    ngx_uint_t                  i;
-    ngx_shm_zone_t             *shm_zone;
-    ngx_http_limit_zone_ctx_t  *ctx;
-
-    value = cf->args->elts;
-
-    ctx = NULL;
-    size = 0;
-    name.len = 0;
-
-    for (i = 1; i < cf->args->nelts; i++) {
-
-        if (ngx_strncmp(value[i].data, "zone=", 5) == 0) {
-
-            name.data = value[i].data + 5;
-
-            p = (u_char *) ngx_strchr(name.data, ':');
-
-            if (p == NULL) {
-                ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                                   "invalid zone size \"%V\"", &value[i]);
-                return NGX_CONF_ERROR;
-            }
-
-            name.len = p - name.data;
-
-            s.data = p + 1;
-            s.len = value[i].data + value[i].len - s.data;
-
-            size = ngx_parse_size(&s);
-
-            if (size == NGX_ERROR) {
-                ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                                   "invalid zone size \"%V\"", &value[i]);
-                return NGX_CONF_ERROR;
-            }
-
-            if (size < (ssize_t) (8 * ngx_pagesize)) {
-                ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                                   "zone \"%V\" is too small", &value[i]);
-                return NGX_CONF_ERROR;
-            }
-
-            continue;
-        }
-
-        if (value[i].data[0] == '$') {
-
-            value[i].len--;
-            value[i].data++;
-
-            ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_zone_ctx_t));
-            if (ctx == NULL) {
-                return NGX_CONF_ERROR;
-            }
-
-            ctx->index = ngx_http_get_variable_index(cf, &value[i]);
-            if (ctx->index == NGX_ERROR) {
-                return NGX_CONF_ERROR;
-            }
-
-            ctx->var = value[i];
-
-            continue;
-        }
-
-        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                           "invalid parameter \"%V\"", &value[i]);
-        return NGX_CONF_ERROR;
-    }
-
-    if (name.len == 0) {
-        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                           "\"%V\" must have \"zone\" parameter",
-                           &cmd->name);
-        return NGX_CONF_ERROR;
-    }
-
-    if (ctx == NULL) {
-        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                           "no variable is defined for %V \"%V\"",
-                           &cmd->name, &name);
-        return NGX_CONF_ERROR;
-    }
-
-    shm_zone = ngx_shared_memory_add(cf, &name, size,
-                                     &ngx_http_limit_zone_module);
-    if (shm_zone == NULL) {
-        return NGX_CONF_ERROR;
-    }
-
-    if (shm_zone->data) {
-        ctx = shm_zone->data;
-
-        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                           "%V \"%V\" is already bound to variable \"%V\"",
-                           &cmd->name, &name, &ctx->var);
-        return NGX_CONF_ERROR;
-    }
-
-    shm_zone->init = ngx_http_limit_zone_init_zone;
-    shm_zone->data = ctx;
-
-    return NGX_CONF_OK;
-}
-
-
-static char *
-ngx_http_limit_zone(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
-{
-    ssize_t                     n;
-    ngx_str_t                  *value;
-    ngx_shm_zone_t             *shm_zone;
-    ngx_http_limit_zone_ctx_t  *ctx;
-
-    ngx_conf_deprecated(cf, &ngx_conf_deprecated_limit_zone, NULL);
-
-    value = cf->args->elts;
-
-    if (value[2].data[0] != '$') {
-        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                           "invalid variable name \"%V\"", &value[2]);
-        return NGX_CONF_ERROR;
-    }
-
-    value[2].len--;
-    value[2].data++;
-
-    ctx = ngx_pcalloc(cf->pool, sizeof(ngx_http_limit_zone_ctx_t));
-    if (ctx == NULL) {
-        return NGX_CONF_ERROR;
-    }
-
-    ctx->index = ngx_http_get_variable_index(cf, &value[2]);
-    if (ctx->index == NGX_ERROR) {
-        return NGX_CONF_ERROR;
-    }
-
-    ctx->var = value[2];
-
-    n = ngx_parse_size(&value[3]);
-
-    if (n == NGX_ERROR) {
-        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                           "invalid size of limit_zone \"%V\"", &value[3]);
-        return NGX_CONF_ERROR;
-    }
-
-    if (n < (ngx_int_t) (8 * ngx_pagesize)) {
-        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                           "limit_zone \"%V\" is too small", &value[1]);
-        return NGX_CONF_ERROR;
-    }
-
-
-    shm_zone = ngx_shared_memory_add(cf, &value[1], n,
-                                     &ngx_http_limit_zone_module);
-    if (shm_zone == NULL) {
-        return NGX_CONF_ERROR;
-    }
-
-    if (shm_zone->data) {
-        ctx = shm_zone->data;
-
-        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                        "limit_zone \"%V\" is already bound to variable \"%V\"",
-                        &value[1], &ctx->var);
-        return NGX_CONF_ERROR;
-    }
-
-    shm_zone->init = ngx_http_limit_zone_init_zone;
-    shm_zone->data = ctx;
-
-    return NGX_CONF_OK;
-}
-
-
-static char *
-ngx_http_limit_conn(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
-{
-    ngx_shm_zone_t               *shm_zone;
-    ngx_http_limit_zone_conf_t   *lzcf = conf;
-    ngx_http_limit_zone_limit_t  *limit, *limits;
-
-    ngx_str_t  *value;
-    ngx_int_t   n;
-    ngx_uint_t  i;
-
-    value = cf->args->elts;
-
-    shm_zone = ngx_shared_memory_add(cf, &value[1], 0,
-                                     &ngx_http_limit_zone_module);
-    if (shm_zone == NULL) {
-        return NGX_CONF_ERROR;
-    }
-
-    limits = lzcf->limits.elts;
-
-    if (limits == NULL) {
-        if (ngx_array_init(&lzcf->limits, cf->pool, 1,
-                           sizeof(ngx_http_limit_zone_limit_t))
-            != NGX_OK)
-        {
-            return NGX_CONF_ERROR;
-        }
-    }
-
-    for (i = 0; i < lzcf->limits.nelts; i++) {
-        if (shm_zone == limits[i].shm_zone) {
-            return "is duplicate";
-        }
-    }
-
-    n = ngx_atoi(value[2].data, value[2].len);
-    if (n <= 0) {
-        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                           "invalid number of connections \"%V\"", &value[2]);
-        return NGX_CONF_ERROR;
-    }
-
-    if (n > 65535) {
-        ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-                           "connection limit must be less 65536");
-        return NGX_CONF_ERROR;
-    }
-
-    limit = ngx_array_push(&lzcf->limits);
-    limit->conn = n;
-    limit->shm_zone = shm_zone;
-
-    return NGX_CONF_OK;
-}
-
-
-static ngx_int_t
-ngx_http_limit_zone_init(ngx_conf_t *cf)
-{
-    ngx_http_handler_pt        *h;
-    ngx_http_core_main_conf_t  *cmcf;
-
-    cmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_core_module);
-
-    h = ngx_array_push(&cmcf->phases[NGX_HTTP_PREACCESS_PHASE].handlers);
-    if (h == NULL) {
-        return NGX_ERROR;
-    }
-
-    *h = ngx_http_limit_zone_handler;
-
-    return NGX_OK;
-}