Mercurial > hg > nginx-quic
view src/stream/ngx_stream_script.h @ 7377:d4448892a294
HTTP/2: flood detection.
Fixed uncontrolled memory growth in case peer is flooding us with
some frames (e.g., SETTINGS and PING) and doesn't read data. Fix
is to limit the number of allocated control frames.
author | Ruslan Ermilov <ru@nginx.com> |
---|---|
date | Tue, 06 Nov 2018 16:29:35 +0300 |
parents | 0125b151c9a5 |
children | b82162b8496a |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_STREAM_SCRIPT_H_INCLUDED_ #define _NGX_STREAM_SCRIPT_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_stream.h> typedef struct { u_char *ip; u_char *pos; ngx_stream_variable_value_t *sp; ngx_str_t buf; ngx_str_t line; unsigned flushed:1; unsigned skip:1; ngx_stream_session_t *session; } ngx_stream_script_engine_t; typedef struct { ngx_conf_t *cf; ngx_str_t *source; ngx_array_t **flushes; ngx_array_t **lengths; ngx_array_t **values; ngx_uint_t variables; ngx_uint_t ncaptures; ngx_uint_t size; void *main; unsigned complete_lengths:1; unsigned complete_values:1; unsigned zero:1; unsigned conf_prefix:1; unsigned root_prefix:1; } ngx_stream_script_compile_t; typedef struct { ngx_str_t value; ngx_uint_t *flushes; void *lengths; void *values; } ngx_stream_complex_value_t; typedef struct { ngx_conf_t *cf; ngx_str_t *value; ngx_stream_complex_value_t *complex_value; unsigned zero:1; unsigned conf_prefix:1; unsigned root_prefix:1; } ngx_stream_compile_complex_value_t; typedef void (*ngx_stream_script_code_pt) (ngx_stream_script_engine_t *e); typedef size_t (*ngx_stream_script_len_code_pt) (ngx_stream_script_engine_t *e); typedef struct { ngx_stream_script_code_pt code; uintptr_t len; } ngx_stream_script_copy_code_t; typedef struct { ngx_stream_script_code_pt code; uintptr_t index; } ngx_stream_script_var_code_t; typedef struct { ngx_stream_script_code_pt code; uintptr_t n; } ngx_stream_script_copy_capture_code_t; typedef struct { ngx_stream_script_code_pt code; uintptr_t conf_prefix; } ngx_stream_script_full_name_code_t; void ngx_stream_script_flush_complex_value(ngx_stream_session_t *s, ngx_stream_complex_value_t *val); ngx_int_t ngx_stream_complex_value(ngx_stream_session_t *s, ngx_stream_complex_value_t *val, ngx_str_t *value); ngx_int_t ngx_stream_compile_complex_value( ngx_stream_compile_complex_value_t *ccv); char *ngx_stream_set_complex_value_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); ngx_uint_t ngx_stream_script_variables_count(ngx_str_t *value); ngx_int_t ngx_stream_script_compile(ngx_stream_script_compile_t *sc); u_char *ngx_stream_script_run(ngx_stream_session_t *s, ngx_str_t *value, void *code_lengths, size_t reserved, void *code_values); void ngx_stream_script_flush_no_cacheable_variables(ngx_stream_session_t *s, ngx_array_t *indices); void *ngx_stream_script_add_code(ngx_array_t *codes, size_t size, void *code); size_t ngx_stream_script_copy_len_code(ngx_stream_script_engine_t *e); void ngx_stream_script_copy_code(ngx_stream_script_engine_t *e); size_t ngx_stream_script_copy_var_len_code(ngx_stream_script_engine_t *e); void ngx_stream_script_copy_var_code(ngx_stream_script_engine_t *e); size_t ngx_stream_script_copy_capture_len_code(ngx_stream_script_engine_t *e); void ngx_stream_script_copy_capture_code(ngx_stream_script_engine_t *e); #endif /* _NGX_STREAM_SCRIPT_H_INCLUDED_ */