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authorWenzel, Alexander <alexander.wenzel@qsc.de>2016-06-21 15:49:54 +0000
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2016-06-21 20:56:28 +0200
commit35adc1fa7fbecea572afaf829a33454da0f764b0 (patch)
treedcfdda8fbb42d41a03833260205f9c7b2fe473dc /MAINTAINERS
parente3848e3dd64a8d6437531488fe341354bc02eaed (diff)
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/getaddrinfo.c;h=925c3c5c71596c02f7e58a0ffcdcaae44eb065c1 [2] https://sourceware.org/git/?p=glibc.git;a=commit;f=sysdeps/posix/getaddrinfo.c;h=28977c2c1acb789660ad47e0d88e42486059c916 Signed-off-by: Alexander Wenzel <alexander.wenzel@qsc.de>
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