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patches/glibc/2.9/170-2.10-dns-no-gethostbyname4.patch
author Michael Hope <michael.hope@linaro.org>
Wed Oct 19 15:27:32 2011 +1300 (2011-10-19)
changeset 2739 f320e22f2cba
parent 1201 c9967a6e3b25
permissions -rw-r--r--
arch: add softfp support

Some architectures support a mixed hard/soft floating point, where
the compiler emits hardware floating point instructions, but passes
the operands in core (aka integer) registers.

For example, ARM supports this mode (to come in the next changeset).

Add support for softfp cross compilers to the GCC and GLIBC
configuration. Needed for Ubuntu and other distros that are softfp.

Signed-off-by: Michael Hope <michael.hope@linaro.org>
[yann.morin.1998@anciens.enib.fr: split the original patch]
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> 
     1 Original patch from: gentoo/src/patchsets/glibc/2.9/0080_all_glibc-2.10-dns-no-gethostbyname4.patch

     2 

     3 -= BEGIN original header =-

     4 http://sourceware.org/bugzilla/show_bug.cgi?id=7060

     5 http://bugs.gentoo.org/250468

     6 

     7 The gethostbyname4() lookup method is problematic since it fires out both

     8 the A and AAAA DNS queries in parallel and over the same socket. This

     9 should work in theory, but it turns out that many cheap DSL modems and

    10 similar devices have buggy DNS servers - if the AAAA query arrives too

    11 quickly after the A query, the server will generate only a single reply

    12 with the A query id but returning an error for the AAAA query; we get

    13 stuck waiting for the second reply.

    14 

    15 For gethostbyname4() users affected, disabling IPv6 in the system might

    16 work around the issue, unfortunately it only helps with applications

    17 using AI_ADDRCONFIG (e.g. Firefox); some (notably e.g. Pidgin) neglect

    18 to do that.

    19 

    20 Real fix should be using separate ports for the A and AAAA queries.

    21 

    22 -= END original header =-

    23 

    24 diff -durN glibc-2_9.orig/resolv/Versions glibc-2_9/resolv/Versions

    25 --- glibc-2_9.orig/resolv/Versions	2008-08-01 19:15:34.000000000 +0200

    26 +++ glibc-2_9/resolv/Versions	2009-02-02 22:00:46.000000000 +0100

    27 @@ -102,7 +102,7 @@

    28      _nss_dns_gethostbyname_r; _nss_dns_getnetbyaddr_r;

    29      _nss_dns_getnetbyname_r; _nss_dns_getcanonname_r;

    30      _nss_dns_gethostbyaddr2_r;

    31 -    _nss_dns_gethostbyname4_r;

    32 +#    _nss_dns_gethostbyname4_r;

    33    }

    34  }

    35
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