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Fix IPv6-only lookups through getaddrinfo
A recent patch introduced a problem where IPv6 lookups happily returned IPv4 addresses.
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2011-06-21 Ulrich Drepper <drepper@gmail.com>
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[BZ #12885]
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* sysdeps/posix/getaddrinfo.c (gaih_inet): When looking up only IPv6
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addresses using gethostbyname4_r ignore IPv4 addresses.
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* sysdeps/posix/getaddrinfo.c (gaih_inet): After the last change the
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branch using gethostbyname2 is only for AF_INET. Optimize accordingly.
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6
NEWS
6
NEWS
@ -1,4 +1,4 @@
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GNU C Library NEWS -- history of user-visible changes. 2011-6-15
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GNU C Library NEWS -- history of user-visible changes. 2011-6-21
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Copyright (C) 1992-2009, 2010, 2011 Free Software Foundation, Inc.
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See the end for copying conditions.
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@ -7,6 +7,10 @@ using `glibc' in the "product" field.
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Version 2.15
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* The following bugs are resolved with this release:
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12885
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* New program pldd to list loaded object of a process
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Implemented by Ulrich Drepper.
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@ -871,16 +871,44 @@ gaih_inet (const char *name, const struct gaih_service *service,
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}
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}
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no_inet6_data = no_data;
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if (status == NSS_STATUS_SUCCESS)
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{
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assert (!no_data);
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no_data = 1;
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if ((req->ai_flags & AI_CANONNAME) != 0 && canon == NULL)
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canon = (*pat)->name;
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while (*pat != NULL)
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pat = &((*pat)->next);
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{
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if ((*pat)->family == AF_INET
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&& req->ai_family == AF_INET6
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&& (req->ai_flags & AI_V4MAPPED) != 0)
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{
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uint32_t *pataddr = (*pat)->addr;
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(*pat)->family = AF_INET6;
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pataddr[3] = pataddr[0];
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pataddr[2] = htonl (0xffff);
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pataddr[1] = 0;
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pataddr[0] = 0;
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pat = &((*pat)->next);
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no_data = 0;
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}
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else if ((*pat)->family == AF_UNSPEC
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|| (*pat)->family == req->ai_family)
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{
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pat = &((*pat)->next);
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no_data = 0;
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if (req->ai_family == AF_INET6)
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got_ipv6 = true;
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}
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else
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*pat = ((*pat)->next);
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}
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}
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no_inet6_data = no_data;
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}
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else
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{
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