Comment by 1vuio0pswjnm7
12 hours ago
"One such implementation that broke is the getaddrinfo function in glibc, which is commonly used on Linux for DNS resolution. When looking at its getanswer_r implementation, we can indeed see it expects to find the CNAME records before any answers:"
Wherever possible I compile with gethostbyname instead of getaddrinfo. I use musl instead of glibc
Nothing against IPv6 but I do not use it on the computers and networks I control
NB. This is not code that belongs to me
When compiling software written by others, sometimes there are compile-time options that allow not using getaddrinfo or IPv6
For example,
links (--without-getaddrinfo)
haproxy (USE_GETADDRINFO="")
tnftp (--disable-ipv6)
elinks (--disable-ipv6)
wolfssl (ipv6 disabled by default)
stunnel (--disable-ipv6)
socat (--disable-ipv6)
and many more
Together with localhost TLS forward proxy I also use lots of older software that only used gethostbyname, e.g., original netcat, ucspi-tcp, libwww, original links, etc.
Generally I avoid mobile OS (corporate OS for data collection, surveillance and ad services)
Mobile data is disabled. I almost never use cellular networks for internet
Mobile sucks for internet IMHO; I have zero expectation re: speed and I cannot control what ISPs choose to do
For me, non-corporate UNIX-like OS are smaller, faster, easier to control, more interesting
Your code runs slower on mobile devices, since (as a rule of thumb) mobile networks are ipv6-only and ipv4 traffic has to pass through a few layers of tunneling.
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