This is useful for memory constrained systems such as esp32
to improve heap usage minfree/watermark.
On esp32 with simultaneous_ssl_restriction = 2 (MQTT+H1),
Without this change, sys heap minfree ranges from 59k to 71k
in 100 iterations, average 66.5k.
With this change, sys heap minfree ranges from 64k to 71k
in 100 interations, average 68.7k
lws_tls_restrict_borrow() returns error when tls restriction limit is
reached. However lws_ssl_close() still calls lws_tls_restrict_return()
to decrease simultaneous_ssl. Thus LWS accepts more than allowed ssl
links, making simultaneous_ssl_restriction useless.
Fix it by tracking lws_tls_restrict_borrow() return value and only
calling lws_tls_restrict_return() if lws_tls_restrict_borrow() is
successful.
Add -Wextra (with -Wno-unused-parameter) to unix builds in addition to
-Wall -Werror.
This can successfully build everything in Sai without warnings / errors.
On some platforms AF_INET and AF_INET6 must be listened for on separate
sockets. Adapt the vhost server creation code to use the new support for
multiple listen sockets per vhost to create up to two listen sockets for
AF_INET and AF_INET6.
It refactors how the decision about the AF is made and propagated so
there's only one place for it.
Some platforms need two sockets with AF_INET and AF_INET6 to listen to both
protocols.
This patch changes the single listen socket each vhost could previously
handle to become an lws_dll2 and adapts the related code to handle them as
a linked-list rather than as a singleton.
The next patch adapts the listen / server code to create multiple listen
wsi for vhosts listening on multiple ip protocols.
Until now although we can follow redirects, and they can promote the
protocol from h1->h2, we couldn't handle h2 wsi reuse since there are many
states in the wsi affected by being h2.
This wipes the related states in lws_wsi_reset() and follows the generic
wsi close flow before deviating into the redirect really close to the end,
ensuring we cleaned out evidence of our previous life properly.
h2->h2 redirects work properly after this.
The max number of redirects is increased from 3 -> 4 since this was seen in
the wild with www and then geographic-based redirects.
Add support for dynamically determining the CAs needed to validate server
certificates. This allows you to avoid instantiating > 120 X.509 trusted
CA certs and have them take up heap the whole time.
Works for both openssl and mbedtls.
See READMEs/README.jit-trust.md for the documentation
You likely want the next patch for http redirect enhancements as well.
We have access to a simplified report of the problem name for tls
validation inside the validation cb, let's bring it out and
use it for OpenSSL CCE reporting.
Mbedtls does not have the same concept as openssl about preloading the
system trust store into every SSL_CTX.
This patch allows you to simulate the behaviour by passing in a context
creation-time filepath that all client SSL_CTX will be initialized from.
This provides a build option LWS_WITH_CONMON that lets user code recover
detailed connection stats on client connections with the LCCSCF_CONMON
flag.
In addition to latencies for dns, socket connection, tls and first protocol
response where possible, it also provides the user code an unfiltered list
of DNS responses that the client received, and the peer it actually
succeded to connect to.
There are a few build options that are trying to keep and report
various statistics
- DETAILED_LATENCY
- SERVER_STATUS
- WITH_STATS
remove all those and establish a generic rplacement, lws_metrics.
lws_metrics makes its stats available via an lws_system ops function
pointer that the user code can set.
Openmetrics export is supported, for, eg, prometheus scraping.
openssl v3-alpha11 has marked EC_KEY pieces as deprecated... we use it in
LWS_WITH_GENCRYPTO but the related RSA etc pieces were already deprecated
for that. We use EC_KEY pieces in vhost init...
The apis are not removed but deprecated, we should have a way to keep
trucking, but as it is the deprecation warning is promoted to an error.
Let's add LWS_SUPPRESS_DEPRECATED_API_WARNINGS option off by default. If
enabled at cmake, external deprecated api warnings are suppressed. This
gives a general workaround for now for opensslv3.
In addition, even if you don't do that, let's notice we are on openssl v3
and don't build the EC curve selection stuff, I don't think anyone is
actually using it anyway.
Update libressl rules for options api type,
add some docs to build, use CHECK_SYMBOL_EXISTS since
CHECK_FUNCTION_EXISTS is fooled by the conditionals
in the headers
On h2 server POST, there's a race to see if the POST body is going to be
received coalesced with the headers.
The problem is on h2, we can't action the stream http request or body until
the stream is writeable, since we may start issuing the response right away;
there's already DEFERRING_ACTION state to manage this. And indeed, the
coalesced, not-immediately-actionable POST body is buflisted properly.
However when we come to action the POST using buflisted data, we don't follow
the same pattern as dealing with the incoming data immediately.
This patch aligns the pattern dumping the buflist content to track
expected rx_content_length and handle BODY_COMPLETION if we got to
the end of it, along with removal from the pt list of wsi with pending
buflists if we used it up.
