diff options
| author | Ulrich Drepper <drepper@gmail.com> | 2011-06-21 17:03:38 -0400 |
|---|---|---|
| committer | Andreas Schwab <schwab@redhat.com> | 2011-06-22 10:49:40 +0200 |
| commit | 0e779ef2a9fcfd13f5243224c82894ba797ecec3 (patch) | |
| tree | 41355d9d55bf26be780e8dec2d2a28bc4abcaab1 | |
| parent | 5babac1535735419921ca9edbf5f6c96a40296da (diff) | |
| download | glibc-0e779ef2a9fcfd13f5243224c82894ba797ecec3.tar.gz | |
Fix IPv6-only lookups through getaddrinfo
A recent patch introduced a problem where IPv6 lookups happily returned
IPv4 addresses.
(cherry picked from commit c0244a9dedce43a4b950d91451b16a7cf5408476)
| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | sysdeps/posix/getaddrinfo.c | 34 |
2 files changed, 37 insertions, 3 deletions
@@ -1,3 +1,9 @@ +2011-06-21 Ulrich Drepper <drepper@gmail.com> + + [BZ #12885] + * sysdeps/posix/getaddrinfo.c (gaih_inet): When looking up only IPv6 + addresses using gethostbyname4_r ignore IPv4 addresses. + 2011-06-15 Ulrich Drepper <drepper@gmail.com> * resolv/res_send.c (__libc_res_nsend): Fix typos in last patch. We diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c index 469abe22de..abd8551074 100644 --- a/sysdeps/posix/getaddrinfo.c +++ b/sysdeps/posix/getaddrinfo.c @@ -881,16 +881,44 @@ gaih_inet (const char *name, const struct gaih_service *service, } } - no_inet6_data = no_data; - if (status == NSS_STATUS_SUCCESS) { + assert (!no_data); + no_data = 1; + if ((req->ai_flags & AI_CANONNAME) != 0 && canon == NULL) canon = (*pat)->name; while (*pat != NULL) - pat = &((*pat)->next); + { + if ((*pat)->family == AF_INET + && req->ai_family == AF_INET6 + && (req->ai_flags & AI_V4MAPPED) != 0) + { + uint32_t *pataddr = (*pat)->addr; + (*pat)->family = AF_INET6; + pataddr[3] = pataddr[0]; + pataddr[2] = htonl (0xffff); + pataddr[1] = 0; + pataddr[0] = 0; + pat = &((*pat)->next); + no_data = 0; + } + else if ((*pat)->family == AF_UNSPEC + || (*pat)->family == req->ai_family) + { + pat = &((*pat)->next); + + no_data = 0; + if (req->ai_family == AF_INET6) + got_ipv6 = true; + } + else + *pat = ((*pat)->next); + } } + + no_inet6_data = no_data; } else { |