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A prototype stores linked application processes structures. When an
application process terminates, it's removed from the list. To avoid double
removal, the pointer to the next element should be set to NULL.
The issue was introduced in c8790d2a89bb.
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Port's "data" field may be used by application and thus need to be set to NULL.
The issue was introduced in the f8a0992944df commit.
Found by Coverity (CID 374352).
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In PHP, custom fastcgi_finish_request() and overloaded chdir() functions can be
invoked by an OPcache preloading script (it runs when php_module_startup() is
called in the app process setup handler). In this case, there was no runtime
context set so trying to access it caused a segmentation fault.
This closes #602 issue on GitHub.
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The reference to the access_log structure is stored in the current
nxt_router_conf_t and the global nxt_router_t. When the reference is copied,
the reference counter should be adjusted accordingly.
This closes #593 issue on GitHub.
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After the c8790d2a89bb commit, the SIGCHLD handler may return before processing
all awaiting PIDs. To avoid zombie processes and ensure successful main
process termination, waitpid() must be called until an error is returned.
This closes #600 issue on GitHub.
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Splitting the process type connectivity matrix to 'keep ports' and 'send
ports'; the 'keep ports' matrix is used to clean up unnecessary ports after
forking a new process, and the 'send ports' matrix determines which process
types expect to get created process ports.
Unfortunately, the original single connectivity matrix no longer works because
of an application stop delay caused by prototypes. Existing applications
should not get the new router port at the moment.
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Application process started with shared port (and queue) already configured.
But still waits for PORT_ACK message from router to start request processing
(so-called "ready state").
Waiting for router confirmation is necessary. Otherwise, the application may
produce response and send it to router before the router have the information
about the application process. This is a subject of further optimizations.
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The "recv_msg.incoming_buf" is checked after jumping to the "done" label
if nxt_socket_msg_oob_get_fds() returns an error.
Also moved initialization of "port_msg" near to its first usage.
Found by Coverity (CID 373899).
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It was accidentally added in 4645a43bc248.
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This enables the reuse of process creation functions.
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The "query" option matches decoded arguments, including plus ('+') to
space (' '). Like "uri", it can be a string or an array of strings.
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A valid query string argument is a string of "key=value\[&key=value ...\]"
pairs with non-empty keys. The fix removes invalid empty arguments.
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Introducting application graceful stop. For now only used when application
process reach request limit value.
This closes #585 issue on GitHub.
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port->app field is not thread safe and should be used in main thread only.
To release port after request processing, application reference should be
obtained from corresponding request descriptor.
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Memory allocated for "mem" and "mmap_handler" leaked in that case.
Also removed one dead assigment of "hdr" pointer.
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Compared to the previous implementation based on OpenSSL, the new implementation
has these advantages:
1. Strict and reliable detection of invalid strings, including strings with
less than 4 bytes of garbage at the end;
2. Allows to use Base64 strings without '=' padding.
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Declarations became unused after 6976d36be926.
No functional changes.
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The bug has been introduced in 0bca988e9541.
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It's not needed after 69d823e5710a.
Found by Clang Static Analyzer.
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This commit supports variable in the "share" option, the finding path to
file serve is the value from "share". An example:
{
"share": "/www/data/static$uri"
}
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Because the configuration values were read from the listener's configuration,
an established WebSocket connection was unable to work properly (i. e. stuck)
if the listener was removed. The correct source of configuration values is the
request config joint.
This is related to issue #581 on GitHub.
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Explicitly using the sysconf() call to obtain the minimum thread stack size
instead of the PTHREAD_STACK_MIN macro.
This closes #576 PR on GitHub.
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Since the "pass" option supports both strings and variables, a generic
nxt_var_t structure can be used in the configuration phase, and the "name"
field in actions is redundant.
No functional changes.
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Deduplicated code and improved style.
No functional changes.
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No functional changes.
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This commit introduces the replacement of the client address based on the value
of a specified HTTP header. This is intended for use when Unit is placed
behind a reverse proxy like nginx or a CDN.
You must specify the source addresses of the trusted proxies. This can be
accomplished with any valid IP pattern supported by Unit's match block:
["10.0.0.1", "10.4.0.0/16", "!192.168.1.1"]
The feature is configured per listener.
The client address replacement functionality only operates when there is a
source IP match and the specified header is present. Typically this would be
an 'X-Forwarded-For' header.
{
"listeners": {
"127.0.0.1:8080": {
"client_ip": {
"header": "X-Forwarded-For",
"source": [
"10.0.0.0/8"
]
},
"pass": "applications/my_app"
},
}
}
If a request occurs and Unit receives a header like below:
"X-Forwarded-For: 84.123.23.23"
By default, Unit trusts the last rightmost IP in the header, so REMOTE_ADDR
will be set to 84.123.23.23 if the connection originated from 10.0.0.0/8.
If Unit runs behind consecutive reverse proxies and receives a header similar
to the following:
"X-Forwarded-For: 84.123.23.23, 10.0.0.254"
You will need to enable "recursive" checking, which walks the header from
last address to first and chooses the first non-trusted address it finds.
{
"listeners": {
"127.0.0.1:8080": {
"client_ip": {
"header": "X-Forwarded-For",
"source": [
"10.0.0.0/8"
]
"recursive": true,
},
"pass": "applications/my_app"
},
}
}
If a connection from 10.0.0.0/8 occurs, the chain is walked. Here, 10.0.0.254
is also a trusted address so the client address will be replaced with
84.123.23.23.
If all IP addresses in the header are trusted, the client address is set to
the first address in the header:
If 10.0.0.0/8 is trusted and "X-Forwarded-For: 10.0.0.3, 10.0.0.2, 10.0.0.1",
the client address will be replaced with 10.0.0.3.
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A crash would occur when the router tried to match an
against an empty address pattern array.
The following configuration was used to reproduce the
issue:
{
"listeners": {
"127.0.0.1:8082": {
"pass": "routes"
}
},
"routes": [
{
"match": {
"source": []
},
"action": {
"return": 200
}
}
]
}
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In the case that routes or upstreams is empty and the pass option is a variable.
If the resolved pass is routes or upstreams, a segment error occurred.
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Found by Clang Static Analyzer.
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When processing a restart request, the router sends a QUIT message to all
existing processes of the application. Then, a new shared application port is
created to ensure that new requests won't be handled by the old processes of
the application.
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No functional changes.
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No functional changes.
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No functional changes.
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