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"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 im
by 1vuio0pswjnm7 10mo 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
- immibis 10mo agoYour 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.
- 1vuio0pswjnm7 10mo agoNB. 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
- 1vuio0pswjnm7 10mo agoO5QXGIBLGIXC4LQK
- 1vuio0pswjnm7 10mo agoSometimes software written by others provides compile-time options to disable getaddrinfo or IPv6. Sometimes the software onllly uses gethostbyname For example, tinydns (only uses gethostbyname) nsd (--disable-ipv6) I compile static binaries with musl. I do not use glibc
- 1vuio0pswjnm7 10mo agoIt appears that some people prefer IPv4 and do not need IPv6 For example, from another story (about IP addresses) on today's HN front page: https://news.ycombinator.com/item?id=46693867 https://news.ycombinator.com/item?id=46693867 https://news.ycombinator.com/item?id=46695198 https://news.ycombinator.com/item?id=46695198
- 1vuio0pswjnm7 10mo agoAnd not long ago: https://news.ycombinator.com/item?id=46472163 https://news.ycombinator.com/item?id=46472163