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The FreeBSD SO_SETFIB support.
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The FreeBSD accept filters support.
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The Linux TCP_DEFER_ACCEPT support.
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Server name is taken either from ngx_stream_ssl_module or
ngx_stream_ssl_preread_module.
The change adds "default_server" parameter to the "listen" directive,
as well as the following directives: "server_names_hash_max_size",
"server_names_hash_bucket_size", "server_name" and "ssl_reject_handshake".
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Previously, ngx_udp_rbtree_insert_value() was used for plain UDP and
ngx_quic_rbtree_insert_value() was used for QUIC. Because of this it was
impossible to initialize connection tree in ngx_create_listening() since
this function is not aware what kind of listening it creates.
Now ngx_udp_rbtree_insert_value() is used for both QUIC and UDP. To make
is possible, a generic key field is added to ngx_udp_connection_t. It keeps
client address for UDP and connection ID for QUIC.
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Previously, QUIC used the existing UDP framework, which was created for UDP in
Stream. However the way QUIC connections are created and looked up is different
from the way UDP connections in Stream are created and looked up. Now these
two implementations are decoupled.
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Based on a patch by Anbang Wen.
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Also, introduced ngx_stream_quic_module.
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Previously only one address was used by the listen directive handler even if
host name resolved to multiple addresses. Now a separate listening socket is
created for each address.
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Previously, listenings sockets were not cloned if the worker_processes
directive was specified after "listen ... reuseport".
This also simplifies upcoming configuration check on the number
of worker connections, as it needs to know the number of listening
sockets before cloning.
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The "rcvbuf" and "sndbuf" parameters are now supported by
the "listen" directive.
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External structures are now identical regardless of stream SSL module
compiled in or not.
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The IPV6_V6ONLY macro is now checked only while parsing appropriate flag
and when using the macro.
The ipv6only field in listen structures is always initialized to 1,
even if not supported on a given platform. This is expected to prevent
a module compiled without IPV6_V6ONLY from accidentally creating dual
sockets if loaded into main binary with proper IPV6_V6ONLY support.
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In this phase, head of a stream is read and analysed before proceeding to the
content phase. Amount of data read is controlled by the module implementing
the phase, but not more than defined by the "preread_buffer_size" directive.
The time spent on processing preread is controlled by the "preread_timeout"
directive.
The typical preread phase module will parse the beginning of a stream and set
variable that may be used by the content phase, for example to make routing
decision.
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This is a port of corresponding http code with unrelated features excluded.
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Such configurations have very limited use, introduce various problems and
are not officially supported.
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When configured, an individual listen socket on a given address is
created for each worker process. This allows to reduce in-kernel lock
contention on configurations with high accept rates, resulting in better
performance. As of now it works on Linux and DragonFly BSD.
Note that on Linux incoming connection requests are currently tied up
to a specific listen socket, and if some sockets are closed, connection
requests will be reset, see https://lwn.net/Articles/542629/. With
nginx, this may happen if the number of worker processes is reduced.
There is no such problem on DragonFly BSD.
Based on previous work by Sepherosa Ziehau and Yingqi Lu.
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There is no need to set "i" to 0, as it's expected to be 0 assuming
the bindings are properly sorted, and we already rely on this when
explicitly set hport->naddrs to 1. Remaining conditional code is
replaced with identical "hport->naddrs = i + 1".
Identical modifications are done in the mail and stream modules,
in the ngx_mail_optimize_servers() and ngx_stream_optimize_servers()
functions, respectively.
No functional changes.
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The http and stream versions of this macro were identical.
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There's no loc_conf in the mail module.
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On Linux, sockaddr length is required to process unix socket addresses properly
due to unnamed sockets (which don't have sun_path set at all) and abstract
namespace sockets.
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This makes AF_UNIX addresses in mail officially supported.
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For http module this problem was already fixed in r4756.
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The "so_keepalive" directive in mail module was deprecated.
Thanks to Vsevolod Stakhov for initial work.
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error_log with zero level, and r2447, r2466, r2467 were not enough
*) remove bogus "stderr" level
*) some functions and fields renames
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*) no default ssl_cetificate and ssl_cetificate_key
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*) use ngx_snprintf() in ngx_inet_ntop() and ngx_sock_ntop()
as they are called just once per connection
*) NGX_INET_ADDRSTRLEN
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