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view src/stream/ngx_stream_script.h @ 7623:72b792bb3885

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HTTP/2: fixed socket leak with an incomplete HEADERS frame. A connection could get stuck without timers if a client has partially sent the HEADERS frame such that it was split on the individual header boundary. In this case, it cannot be processed without the rest of the HEADERS frame. The fix is to call ngx_http_v2_state_headers_save() in this case. Normally, it would be called from the ngx_http_v2_state_header_block() handler on the next iteration, when there is not enough data to continue processing. This isn't the case if recv_buffer became empty and there's no more data to read.
author Sergey Kandaurov <pluknet@nginx.com>
date Wed, 05 Feb 2020 16:29:23 +0300
parents b82162b8496a
children 3ab8e1e2f0f7
line wrap: on
line source


/*
 * 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;

    union {
        size_t                    size;
    } u;
} 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);
size_t ngx_stream_complex_value_size(ngx_stream_session_t *s,
    ngx_stream_complex_value_t *val, size_t default_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);
char *ngx_stream_set_complex_value_size_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_ */