Programs linked against muslc cannot resolve the peer name against a DNS provided by Netbird client . getaddrinfo with default addrinfo returns EAI_NONAME.
Musl's getaddrinfo with default settings (specifically addrinfo.af_family == AF_UNSPEC) asks for both A and AAAA entry. If any response contains a flag "No such name", error EAI_NONAME is returned. This behaviour is different in glibc. Relevant mailing list: https://www.openwall.com/lists/musl/2021/07/19/8
To Reproduce
Steps to reproduce the behavior:
Connect to a netbird network.
$ docker run --network host -it alpine
In a container: $ ping <valid-peer-domain-name>
Failure occurs
You can also see that choosing to resolve only IPv4 works
$ ping -4 <valid-peer-name
Expected behavior
Proper peer name resolution. Not sure what Netbird's DNS should do but DNSes for example for github.com seem to respond with an empty response but a flag is "No error" instead of "No such name"? Not sure.
Describe the problem
Programs linked against
muslccannot resolve the peer name against a DNS provided by Netbird client .getaddrinfowith defaultaddrinforeturnsEAI_NONAME.Musl's
getaddrinfowith default settings (specificallyaddrinfo.af_family == AF_UNSPEC) asks for bothAandAAAAentry. If any response contains a flag "No such name", errorEAI_NONAMEis returned. This behaviour is different in glibc. Relevant mailing list: https://www.openwall.com/lists/musl/2021/07/19/8To Reproduce
Steps to reproduce the behavior:
$ docker run --network host -it alpine$ ping <valid-peer-domain-name>You can also see that choosing to resolve only IPv4 works
$ ping -4 <valid-peer-nameExpected behavior
Proper peer name resolution. Not sure what Netbird's DNS should do but DNSes for example for
github.comseem to respond with an empty response but a flag is "No error" instead of "No such name"? Not sure.Thanks a lot.