Mercurial > hg > nginx
view src/os/unix/ngx_socket.h @ 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 | efd71d49bde0 |
children | 23880e4ad3e2 |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_SOCKET_H_INCLUDED_ #define _NGX_SOCKET_H_INCLUDED_ #include <ngx_config.h> #define NGX_WRITE_SHUTDOWN SHUT_WR typedef int ngx_socket_t; #define ngx_socket socket #define ngx_socket_n "socket()" #if (NGX_HAVE_FIONBIO) int ngx_nonblocking(ngx_socket_t s); int ngx_blocking(ngx_socket_t s); #define ngx_nonblocking_n "ioctl(FIONBIO)" #define ngx_blocking_n "ioctl(!FIONBIO)" #else #define ngx_nonblocking(s) fcntl(s, F_SETFL, fcntl(s, F_GETFL) | O_NONBLOCK) #define ngx_nonblocking_n "fcntl(O_NONBLOCK)" #define ngx_blocking(s) fcntl(s, F_SETFL, fcntl(s, F_GETFL) & ~O_NONBLOCK) #define ngx_blocking_n "fcntl(!O_NONBLOCK)" #endif #if (NGX_HAVE_FIONREAD) #define ngx_socket_nread(s, n) ioctl(s, FIONREAD, n) #define ngx_socket_nread_n "ioctl(FIONREAD)" #endif int ngx_tcp_nopush(ngx_socket_t s); int ngx_tcp_push(ngx_socket_t s); #if (NGX_LINUX) #define ngx_tcp_nopush_n "setsockopt(TCP_CORK)" #define ngx_tcp_push_n "setsockopt(!TCP_CORK)" #else #define ngx_tcp_nopush_n "setsockopt(TCP_NOPUSH)" #define ngx_tcp_push_n "setsockopt(!TCP_NOPUSH)" #endif #define ngx_shutdown_socket shutdown #define ngx_shutdown_socket_n "shutdown()" #define ngx_close_socket close #define ngx_close_socket_n "close() socket" #endif /* _NGX_SOCKET_H_INCLUDED_ */