Mercurial > hg > nginx
view src/os/win32/ngx_errno.c @ 7851:aa5f8825f24d
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 | 746567d633ac |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #include <ngx_config.h> #include <ngx_core.h> u_char * ngx_strerror(ngx_err_t err, u_char *errstr, size_t size) { u_int len; static u_long lang = MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US); if (size == 0) { return errstr; } len = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, err, lang, (char *) errstr, size, NULL); if (len == 0 && lang) { /* * Try to use English messages first and fallback to a language, * based on locale: non-English Windows have no English messages * at all. This way allows to use English messages at least on * Windows with MUI. */ lang = 0; len = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM, NULL, err, lang, (char *) errstr, size, NULL); } if (len == 0) { return ngx_snprintf(errstr, size, "FormatMessage() error:(%d)", GetLastError()); } /* remove ".\r\n\0" */ while (errstr[len] == '\0' || errstr[len] == CR || errstr[len] == LF || errstr[len] == '.') { --len; } return &errstr[++len]; } ngx_int_t ngx_strerror_init(void) { return NGX_OK; }