Fix incorrect getaddrinfo assertion trigger

[BZ #9954]

With the following /etc/hosts:
127.0.0.1       www.my-domain.es
127.0.1.1       www.my-domain.es
192.168.0.1     www.my-domain.es

Using getaddrinfo() on www.my-domain.es, trigger the following assertion:
../sysdeps/posix/getaddrinfo.c:1473: rfc3484_sort: Assertion
`src->results[i].native == -1 || src->results[i].native == a1_native' failed.

This is due to two different bugs:
- In rfc3484_sort() rule 7, src->results[i].native is assigned even if
src->results[i].index is -1, meaning that no interface is associated.
- In getaddrinfo() the source IP address used with the lo interface needs a
special case, as it can be any IP within 127.X.Y.Z.

1 files changed, 8 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index aa01fa7216..85cc5da1b2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2013-10-25  Aurelien Jarno  <aurelien@aurel32.net>
+
+	[BZ #9954]
+	* sysdeps/posix/getaddrinfo.c (rfc3484_sort): do not assign native
+	result if the result has no associated interface.
+	* sysdeps/posix/getaddrinfo.c (getaddrinfo): correctly detect
+	interface for all 127.X.Y.Z addresses.
+
 2013-10-24  Chris Leonard  <cjl@sugarlabs.org>
 
 	* locale/iso-639.def: Add Ligurian (lij)