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view src/http/v3/ngx_http_v3_encode.h @ 9282:acb8548c00e9

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HTTP/3: fixed dynamic table overflow. While inserting a new entry into the dynamic table, first the entry is added, and then older entries are evicted until table size is within capacity. After the first step, the number of entries may temporarily exceed the maximum calculated from capacity by one entry, which previously caused table overflow. The easiest way to trigger the issue is to keep adding entries with empty names and values until first eviction. The issue was introduced by 987bee4363d1.
author Roman Arutyunyan <arut@nginx.com>
date Tue, 28 May 2024 17:18:50 +0400
parents 0ac25efb2da3
children
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/*
 * Copyright (C) Roman Arutyunyan
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_HTTP_V3_ENCODE_H_INCLUDED_
#define _NGX_HTTP_V3_ENCODE_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_http.h>


uintptr_t ngx_http_v3_encode_varlen_int(u_char *p, uint64_t value);
uintptr_t ngx_http_v3_encode_prefix_int(u_char *p, uint64_t value,
    ngx_uint_t prefix);

uintptr_t ngx_http_v3_encode_field_section_prefix(u_char *p,
    ngx_uint_t insert_count, ngx_uint_t sign, ngx_uint_t delta_base);
uintptr_t ngx_http_v3_encode_field_ri(u_char *p, ngx_uint_t dynamic,
    ngx_uint_t index);
uintptr_t ngx_http_v3_encode_field_lri(u_char *p, ngx_uint_t dynamic,
    ngx_uint_t index, u_char *data, size_t len);
uintptr_t ngx_http_v3_encode_field_l(u_char *p, ngx_str_t *name,
    ngx_str_t *value);
uintptr_t ngx_http_v3_encode_field_pbi(u_char *p, ngx_uint_t index);
uintptr_t ngx_http_v3_encode_field_lpbi(u_char *p, ngx_uint_t index,
    u_char *data, size_t len);


#endif /* _NGX_HTTP_V3_ENCODE_H_INCLUDED_ */