Re: [uclibc-ng-devel] [PATCH] inet/getaddrinfo: fix AF_V4MAPPED behavior for non IPv6 host resolution

When trying to resolve a hostname by getaddrinfo() using some specific settings, it will always return -EAI_NONAME (Name or service not known). To reproduce this behavior, you need to request an IPv6 address with the additional AF_V4MAPPED flag set from an non IPv6 capable hostname. If you choose a IPv4/IPv6 capable hostname like google.com, everything works fine. This patch is more or less a port [1][2] from the glibc and their behavior for the AF_V4MAPPED flag. To test the bug you can use the following snippet. ---- 8< ---- int ret; struct addrinfo* result; struct addrinfo hints; memset(&hints, 0, sizeof(struct addrinfo)); hints.ai_family = AF_INET6; hints.ai_flags = AI_V4MAPPED; ret = getaddrinfo("test.com", NULL, &hints, &result); printf("getaddrinfo(): %i", ret); ---- 8< ---- [1] https://sourceware.org/git/?p=glibc.git;a=commit;f=sysdeps/posix/getaddrinf… [2] https://sourceware.org/git/?p=glibc.git;a=commit;f=sysdeps/posix/getaddrinf… Signed-off-by: Alexander Wenzel &lt;alexander.wenzel(a)qsc.de&gt; --- libc/inet/getaddrinfo.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-)