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annotate src/event/ngx_event_posted.h @ 6982:ac9b1df5b246

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SSL: disabled renegotiation detection in client mode. CVE-2009-3555 is no longer relevant and mitigated by the renegotiation info extension (secure renegotiation). On the other hand, unexpected renegotiation still introduces potential security risks, and hence we do not allow renegotiation on the server side, as we never request renegotiation. On the client side the situation is different though. There are backends which explicitly request renegotiation, and disabled renegotiation introduces interoperability problems. This change allows renegotiation on the client side, and fixes interoperability problems as observed with such backends (ticket #872). Additionally, with TLSv1.3 the SSL_CB_HANDSHAKE_START flag is currently set by OpenSSL when receiving a NewSessionTicket message, and was detected by nginx as a renegotiation attempt. This looks like a bug in OpenSSL, though this change also allows better interoperability till the problem is fixed.
author Sergey Kandaurov <pluknet@nginx.com>
date Tue, 18 Apr 2017 16:08:44 +0300
parents 3d4730eada9c
children 9d2ad2fb4423
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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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_EVENT_POSTED_H_INCLUDED_
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9 #define _NGX_EVENT_POSTED_H_INCLUDED_
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12 #include <ngx_config.h>
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13 #include <ngx_core.h>
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14 #include <ngx_event.h>
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17 #define ngx_post_event(ev, q) \
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18 \
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19 if (!(ev)->posted) { \
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20 (ev)->posted = 1; \
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21 ngx_queue_insert_tail(q, &(ev)->queue); \
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22 \
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23 ngx_log_debug1(NGX_LOG_DEBUG_CORE, (ev)->log, 0, "post event %p", ev);\
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24 \
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25 } else { \
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26 ngx_log_debug1(NGX_LOG_DEBUG_CORE, (ev)->log, 0, \
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27 "update posted event %p", ev); \
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28 }
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31 #define ngx_delete_posted_event(ev) \
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32 \
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33 (ev)->posted = 0; \
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34 ngx_queue_remove(&(ev)->queue); \
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35 \
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36 ngx_log_debug1(NGX_LOG_DEBUG_CORE, (ev)->log, 0, \
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37 "delete posted event %p", ev);
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41 void ngx_event_process_posted(ngx_cycle_t *cycle, ngx_queue_t *posted);
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44 extern ngx_queue_t ngx_posted_accept_events;
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45 extern ngx_queue_t ngx_posted_events;
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48 #endif /* _NGX_EVENT_POSTED_H_INCLUDED_ */