[BZ #644]

	* sysdeps/posix/getaddrinfo.c (fls): New function.
	(gaih_inet): Don't use ffs, use fls.  Convert address to native byte
	order first.
	* posix/Makefile (tests): Add tst-rfc3484.
	* posix/tst-rfc3484.c: New file.

2 files changed, 99 insertions, 1 deletions

diff --git a/posix/Makefile b/posix/Makefile
index 39b078c7fd..8e53fdac44 100644
--- a/posix/Makefile
+++ b/posix/Makefile
@@ -87,7 +87,7 @@ tests		:= tstgetopt testfnm runtests runptests	     \
 		   tst-execvp1 tst-execvp2 tst-execlp1 tst-execlp2 \
 		   tst-execv1 tst-execv2 tst-execl1 tst-execl2 \
 		   tst-execve1 tst-execve2 tst-execle1 tst-execle2 \
-		   tst-execvp3 tst-execvp4
+		   tst-execvp3 tst-execvp4 tst-rfc3484
 xtests		:= bug-ga2
 ifeq (yes,$(build-shared))
 test-srcs	:= globtest
diff --git a/posix/tst-rfc3484.c b/posix/tst-rfc3484.c
new file mode 100644
index 0000000000..378e43a011
--- /dev/null
+++ b/posix/tst-rfc3484.c
@@ -0,0 +1,98 @@
+#include <stdbool.h>
+#include <stdio.h>
+
+/* Internal definitions used in the libc code.  */
+#define __getservbyname_r getservbyname_r
+#define __socket socket
+#define __getsockname getsockname
+#define __inet_aton inet_aton
+#define __gethostbyaddr_r gethostbyaddr_r
+#define __gethostbyname2_r gethostbyname2_r
+
+void
+attribute_hidden
+__check_pf (bool *p1, bool *p2)
+{
+  *p1 = *p2 = true;
+}
+int
+__idna_to_ascii_lz (const char *input, char **output, int flags)
+{
+  return 0;
+}
+int
+__idna_to_unicode_lzlz (const char *input, char **output, int flags)
+{
+  return 0;
+}
+
+#include "../sysdeps/posix/getaddrinfo.c"
+
+service_user *__nss_hosts_database attribute_hidden;
+
+
+/* This is the beginning of the real test code.  The above defines
+   (among other things) the function rfc3484_sort.  */
+
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+# define h(n) n
+#else
+# define h(n) __bswap_constant_32 (n)
+#endif
+
+struct sockaddr_in addrs[] =
+{
+  { .sin_family = AF_INET, .sin_addr = { h (0xc0a86d1d) } },
+  { .sin_family = AF_INET, .sin_addr = { h (0xc0a85d03) } },
+  { .sin_family = AF_INET, .sin_addr = { h (0xc0a82c3d) } },
+  { .sin_family = AF_INET, .sin_addr = { h (0xc0a86002) } },
+  { .sin_family = AF_INET, .sin_addr = { h (0xc0a802f3) } },
+  { .sin_family = AF_INET, .sin_addr = { h (0xc0a80810) } },
+  { .sin_family = AF_INET, .sin_addr = { h (0xc0a85e02) } }
+};
+#define naddrs (sizeof (addrs) / sizeof (addrs[0]))
+static struct addrinfo ais[naddrs];
+static struct sort_result results[naddrs];
+
+static int expected[naddrs] =
+  {
+    6, 1, 0, 3, 2, 4, 5
+  };
+
+
+static int
+do_test (void)
+{
+  struct sockaddr_in so;
+  so.sin_family = AF_INET;
+  so.sin_addr.s_addr = h (0xc0a85f19);
+
+  for (int i = 0; i < naddrs; ++i)
+    {
+      ais[i].ai_family = AF_INET;
+      ais[i].ai_addr = (struct sockaddr *) &addrs[i];
+      results[i].dest_addr = &ais[i];
+      results[i].got_source_addr = true;
+      memcpy(&results[i].source_addr, &so, sizeof (so));
+      results[i].source_addr_len = sizeof (so);
+    }
+
+  qsort (results, naddrs, sizeof (results[0]), rfc3484_sort);
+
+  int result = 0;
+  for (int i = 0; i < naddrs; ++i)
+    {
+      struct in_addr addr = ((struct sockaddr_in *) (results[i].dest_addr->ai_addr))->sin_addr;
+
+      int here = memcmp (&addr, &addrs[expected[i]].sin_addr,
+			 sizeof (struct in_addr));
+      printf ("[%d] = %s: %s\n", i, inet_ntoa (addr), here ? "FAIL" : "OK");
+      result |= here;
+    }
+
+  return result;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"