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view src/core/ngx_regex.h @ 9170:c80d111340dc
QUIC: prevented generating ACK frames with discarded keys.
Previously it was possible to generate ACK frames using formally discarded
protection keys, in particular, when acknowledging a client Handshake packet
used to complete the TLS handshake and to discard handshake protection keys.
As it happens late in packet processing, it could be possible to generate ACK
frames after the keys were already discarded.
ACK frames are generated from ngx_quic_ack_packet(), either using a posted
push event, which envolves ngx_quic_generate_ack() as a part of the final
packet assembling, or directly in ngx_quic_ack_packet(), such as when there
is no room to add a new ACK range or when the received packet is out of order.
The added keys availability check is used to avoid generating late ACK frames
in both cases.
author | Sergey Kandaurov <pluknet@nginx.com> |
---|---|
date | Fri, 20 Oct 2023 18:05:07 +0400 |
parents | d07456044b61 |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_REGEX_H_INCLUDED_ #define _NGX_REGEX_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #if (NGX_PCRE2) #define PCRE2_CODE_UNIT_WIDTH 8 #include <pcre2.h> #define NGX_REGEX_NO_MATCHED PCRE2_ERROR_NOMATCH /* -1 */ typedef pcre2_code ngx_regex_t; #else #include <pcre.h> #define NGX_REGEX_NO_MATCHED PCRE_ERROR_NOMATCH /* -1 */ typedef struct { pcre *code; pcre_extra *extra; } ngx_regex_t; #endif #define NGX_REGEX_CASELESS 0x00000001 #define NGX_REGEX_MULTILINE 0x00000002 typedef struct { ngx_str_t pattern; ngx_pool_t *pool; ngx_uint_t options; ngx_regex_t *regex; int captures; int named_captures; int name_size; u_char *names; ngx_str_t err; } ngx_regex_compile_t; typedef struct { ngx_regex_t *regex; u_char *name; } ngx_regex_elt_t; void ngx_regex_init(void); ngx_int_t ngx_regex_compile(ngx_regex_compile_t *rc); ngx_int_t ngx_regex_exec(ngx_regex_t *re, ngx_str_t *s, int *captures, ngx_uint_t size); #if (NGX_PCRE2) #define ngx_regex_exec_n "pcre2_match()" #else #define ngx_regex_exec_n "pcre_exec()" #endif ngx_int_t ngx_regex_exec_array(ngx_array_t *a, ngx_str_t *s, ngx_log_t *log); #endif /* _NGX_REGEX_H_INCLUDED_ */