Bart Van Severen b9c7d79eba package/libwebsockets: add an option to enable lws async dns ...

Lws now features optional asynchronous, ie, nonblocking recursive DNS
resolution done on the event loop, enable `-DLWS_WITH_SYS_ASYNC_DNS=1`
at cmake to build it in.

The default libc name resolution is via libc `getaddrinfo()`, which is
blocking, possibly for quite long periods (seconds).  If you are
taking care about latency, but want to create outgoing connections,
you can't tolerate this exception from the rule that everything in
lws is nonblocking.

Lws' asynchronous DNS resolver creates a caching name resolver
that directly queries the configured nameserver itself over UDP,
from the event loop.

https://libwebsockets.org/lws-api-doc-main/html/md_READMEs_2README_8async-dns.html

Signed-off-by: Bart Van Severen <bart.vanseveren@barco.com>
Signed-off-by: Thomas Devoogdt <thomas.devoogdt@barco.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

2024-10-26 16:40:08 +02:00

890 B

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