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annotate src/os/unix/ngx_shmem.h @ 7851:aa5f8825f24d

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Resolver: fixed label types handling in ngx_resolver_copy(). Previously, anything with any of the two high bits set were interpreted as compression pointers. This is incorrect, as RFC 1035 clearly states that "The 10 and 01 combinations are reserved for future use". Further, the 01 combination is actually allocated for EDNS extended label type (see RFC 2671 and RFC 6891), not really used though. Fix is to reject unrecognized label types rather than misinterpreting them as compression pointers.
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 25 May 2021 15:17:41 +0300
parents d620f497c50f
children
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 * Copyright (C) Nginx, Inc.
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5 */
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8 #ifndef _NGX_SHMEM_H_INCLUDED_
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9 #define _NGX_SHMEM_H_INCLUDED_
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12 #include <ngx_config.h>
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13 #include <ngx_core.h>
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16 typedef struct {
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17 u_char *addr;
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18 size_t size;
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19 ngx_str_t name;
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20 ngx_log_t *log;
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21 ngx_uint_t exists; /* unsigned exists:1; */
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22 } ngx_shm_t;
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25 ngx_int_t ngx_shm_alloc(ngx_shm_t *shm);
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26 void ngx_shm_free(ngx_shm_t *shm);
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29 #endif /* _NGX_SHMEM_H_INCLUDED_ */