Mercurial > hg > nginx-quic
view src/stream/ngx_stream_ssl_module.h @ 8867:5119c8150478
Fixed runtime handling of systems without EPOLLRDHUP support.
In 7583:efd71d49bde0 (nginx 1.17.5) along with introduction of the
ioctl(FIONREAD) support proper handling of systems without EPOLLRDHUP
support in the kernel (but with EPOLLRDHUP in headers) was broken.
Before the change, rev->available was never set to 0 unless
ngx_use_epoll_rdhup was also set (that is, runtime test for EPOLLRDHUP
introduced in 6536:f7849bfb6d21 succeeded). After the change,
rev->available might reach 0 on systems without runtime EPOLLRDHUP
support, stopping further reading in ngx_readv_chain() and ngx_unix_recv().
And, if EOF happened to be already reported along with the last event,
it is not reported again by epoll_wait(), leading to connection hangs
and timeouts on such systems.
This affects Linux kernels before 2.6.17 if nginx was compiled
with newer headers, and, more importantly, emulation layers, such as
DigitalOcean's App Platform's / gVisor's epoll emulation layer.
Fix is to explicitly check ngx_use_epoll_rdhup before the corresponding
rev->pending_eof tests in ngx_readv_chain() and ngx_unix_recv().
author | Marcus Ball <marcus.ball@live.com> |
---|---|
date | Mon, 30 May 2022 02:38:07 +0300 |
parents | b9e02e9b2f1d |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_STREAM_SSL_H_INCLUDED_ #define _NGX_STREAM_SSL_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #include <ngx_stream.h> typedef struct { ngx_msec_t handshake_timeout; ngx_flag_t prefer_server_ciphers; ngx_ssl_t ssl; ngx_uint_t listen; ngx_uint_t protocols; ngx_uint_t verify; ngx_uint_t verify_depth; ssize_t builtin_session_cache; time_t session_timeout; ngx_array_t *certificates; ngx_array_t *certificate_keys; ngx_array_t *certificate_values; ngx_array_t *certificate_key_values; ngx_str_t dhparam; ngx_str_t ecdh_curve; ngx_str_t client_certificate; ngx_str_t trusted_certificate; ngx_str_t crl; ngx_str_t alpn; ngx_str_t ciphers; ngx_array_t *passwords; ngx_array_t *conf_commands; ngx_shm_zone_t *shm_zone; ngx_flag_t session_tickets; ngx_array_t *session_ticket_keys; u_char *file; ngx_uint_t line; } ngx_stream_ssl_conf_t; extern ngx_module_t ngx_stream_ssl_module; #endif /* _NGX_STREAM_SSL_H_INCLUDED_ */