new file mode 100644
--- /dev/null
+++ b/src/http/ngx_http_config.h
@@ -0,0 +1,70 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#ifndef _NGX_HTTP_CONFIG_H_INCLUDED_
+#define _NGX_HTTP_CONFIG_H_INCLUDED_
+
+
+#include <ngx_alloc.h>
+#include <ngx_http.h>
+
+
+typedef struct {
+    void   **main_conf;
+    void   **srv_conf;
+    void   **loc_conf;
+} ngx_http_conf_ctx_t;
+
+
+typedef struct {
+    ngx_int_t   (*pre_conf)(ngx_conf_t *cf);
+
+    void       *(*create_main_conf)(ngx_conf_t *cf);
+    char       *(*init_main_conf)(ngx_conf_t *cf, void *conf);
+
+    void       *(*create_srv_conf)(ngx_conf_t *cf);
+    char       *(*merge_srv_conf)(ngx_conf_t *cf, void *prev, void *conf);
+
+    void       *(*create_loc_conf)(ngx_conf_t *cf);
+    char       *(*merge_loc_conf)(ngx_conf_t *cf, void *prev, void *conf);
+} ngx_http_module_t;
+
+
+#define NGX_HTTP_MODULE           0x50545448   /* "HTTP" */
+
+#define NGX_HTTP_MAIN_CONF        0x02000000
+#define NGX_HTTP_SRV_CONF         0x04000000
+#define NGX_HTTP_LOC_CONF         0x08000000
+
+
+#define NGX_HTTP_MAIN_CONF_OFFSET  offsetof(ngx_http_conf_ctx_t, main_conf)
+#define NGX_HTTP_SRV_CONF_OFFSET   offsetof(ngx_http_conf_ctx_t, srv_conf)
+#define NGX_HTTP_LOC_CONF_OFFSET   offsetof(ngx_http_conf_ctx_t, loc_conf)
+
+
+#define ngx_http_get_module_main_conf(r, module) r->main_conf[module.ctx_index]
+#define ngx_http_get_module_srv_conf(r, module)  r->srv_conf[module.ctx_index]
+#define ngx_http_get_module_loc_conf(r, module)  r->loc_conf[module.ctx_index]
+
+/*
+ * ngx_http_conf_get_module_srv_conf() and ngx_http_conf_get_module_loc_conf()
+ * must not be used at the merge phase because cf->ctx points to http{}'s ctx
+ */
+
+#define ngx_http_conf_get_module_main_conf(cf, module)                        \
+            ((ngx_http_conf_ctx_t *) cf->ctx)->main_conf[module.ctx_index]
+#define ngx_http_conf_get_module_srv_conf(cf, module)                         \
+            ((ngx_http_conf_ctx_t *) cf->ctx)->srv_conf[module.ctx_index]
+#define ngx_http_conf_get_module_loc_conf(cf, module)                         \
+            ((ngx_http_conf_ctx_t *) cf->ctx)->loc_conf[module.ctx_index]
+
+#define ngx_http_cycle_get_module_main_conf(cycle, module)                    \
+       ((ngx_http_conf_ctx_t *)                                               \
+           cycle->conf_ctx[ngx_http_module.index])->main_conf[module.ctx_index]
+
+
+
+#endif /* _NGX_HTTP_CONFIG_H_INCLUDED_ */