Mercurial > hg > nginx
annotate src/os/unix/ngx_socket.h @ 7142:b9d919b53593 stable-1.12
Stream: relaxed next upstream condition (ticket #1317).
When switching to a next upstream, some buffers could be stuck in the middle
of the filter chain. A condition existed that raised an error when this
happened. As it turned out, this condition prevented switching to a next
upstream if ssl preread was used with the TCP protocol (see the ticket).
In fact, the condition does not make sense for TCP, since after successful
connection to an upstream switching to another upstream never happens. As for
UDP, the issue with stuck buffers is unlikely to happen, but is still possible.
Specifically, if a filter delays sending data to upstream.
The condition can be relaxed to only check the "buffered" bitmask of the
upstream connection. The new condition is simpler and fixes the ticket issue
as well. Additionally, the upstream_out chain is now reset for UDP prior to
connecting to a new upstream to prevent repeating the client data twice.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Mon, 11 Sep 2017 15:32:31 +0300 |
parents | d620f497c50f |
children | efd71d49bde0 |
rev | line source |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
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5 */ |
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8 #ifndef _NGX_SOCKET_H_INCLUDED_ |
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9 #define _NGX_SOCKET_H_INCLUDED_ |
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12 #include <ngx_config.h> |
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15 #define NGX_WRITE_SHUTDOWN SHUT_WR |
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17 typedef int ngx_socket_t; |
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461 | 19 #define ngx_socket socket |
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20 #define ngx_socket_n "socket()" |
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469 | 23 #if (NGX_HAVE_FIONBIO) |
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25 int ngx_nonblocking(ngx_socket_t s); |
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26 int ngx_blocking(ngx_socket_t s); |
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28 #define ngx_nonblocking_n "ioctl(FIONBIO)" |
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29 #define ngx_blocking_n "ioctl(!FIONBIO)" |
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31 #else |
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645 | 33 #define ngx_nonblocking(s) fcntl(s, F_SETFL, fcntl(s, F_GETFL) | O_NONBLOCK) |
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34 #define ngx_nonblocking_n "fcntl(O_NONBLOCK)" |
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645 | 36 #define ngx_blocking(s) fcntl(s, F_SETFL, fcntl(s, F_GETFL) & ~O_NONBLOCK) |
37 #define ngx_blocking_n "fcntl(!O_NONBLOCK)" | |
38 | |
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39 #endif |
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41 int ngx_tcp_nopush(ngx_socket_t s); |
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42 int ngx_tcp_push(ngx_socket_t s); |
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455 | 44 #if (NGX_LINUX) |
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46 #define ngx_tcp_nopush_n "setsockopt(TCP_CORK)" |
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47 #define ngx_tcp_push_n "setsockopt(!TCP_CORK)" |
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49 #else |
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51 #define ngx_tcp_nopush_n "setsockopt(TCP_NOPUSH)" |
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52 #define ngx_tcp_push_n "setsockopt(!TCP_NOPUSH)" |
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54 #endif |
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57 #define ngx_shutdown_socket shutdown |
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58 #define ngx_shutdown_socket_n "shutdown()" |
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60 #define ngx_close_socket close |
465 | 61 #define ngx_close_socket_n "close() socket" |
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64 #endif /* _NGX_SOCKET_H_INCLUDED_ */ |