* sysdeps/posix/getaddrinfo.c (defaults_scopes, scopes): New variables.

	(get_scope): For IPv4 scope, use scopes table.
	(fini): Free scopes table if necessary.
	(free_scopelist): New function.
	(scopecmp): New function.
	(gaiconf_init): Also handle scopev4 entries.
	* posix/tst-rfc3484.c (do_test): Initialize scopes.
	* posix/tst-rfc3484-2.c (do_test): Likewise.
	* posix/gai.conf: Document scopev4 defaults.
	* posix/Makefile (tests): Add tst-rfc3484-3.
	* posix/tst-rfc3484-3.c: New file.

5 files changed, 154 insertions, 0 deletions

diff --git a/posix/Makefile b/posix/Makefile
index 0025408b..c904636 100644
--- a/posix/Makefile
+++ b/posix/Makefile
@@ -90,6 +90,7 @@ tests		:= tstgetopt testfnm runtests runptests	     \
 		   tst-execv1 tst-execv2 tst-execl1 tst-execl2 \
 		   tst-execve1 tst-execve2 tst-execle1 tst-execle2 \
 		   tst-execvp3 tst-execvp4 tst-rfc3484 tst-rfc3484-2 \
+		   tst-rfc3484-3 \
 		   tst-getaddrinfo3 tst-fnmatch2 tst-cpucount tst-cpuset
 xtests		:= bug-ga2
 ifeq (yes,$(build-shared))
diff --git a/posix/gai.conf b/posix/gai.conf
index fe5774b..b4abfc1 100644
--- a/posix/gai.conf
+++ b/posix/gai.conf
@@ -52,3 +52,17 @@
 #    For sites which prefer IPv4 connections change the last line to
 #
 #precedence ::ffff:0:0/96  100
+
+#
+# scopev4  <mask>  <value>
+#    Add another rule to the RFC 3484 scope table for IPv4 addresses.
+#    By default the scope IDs described in section 3.2 in RFC 3484 are
+#    used.  Changing these defaults should hardly ever be necessary.
+#    The defaults are equivalent to:
+#
+#scopev4 ::ffff:169.254.0.0/112  2
+#scopev4 ::ffff:127.0.0.0/104    2
+#scopev4 ::ffff:10.0.0.0/104     5
+#scopev4 ::ffff:172.16.0.0/108   5
+#scopev4 ::ffff:192.168.0.0/112  5
+#scopev4 ::ffff:0.0.0.0          14
diff --git a/posix/tst-rfc3484-2.c b/posix/tst-rfc3484-2.c
index 6d60ccd..d29f072 100644
--- a/posix/tst-rfc3484-2.c
+++ b/posix/tst-rfc3484-2.c
@@ -66,6 +66,7 @@ do_test (void)
 {
   labels = default_labels;
   precedence = default_precedence;
+  scopes = default_scopes;
 
   struct sockaddr_in so1;
   so1.sin_family = AF_INET;
diff --git a/posix/tst-rfc3484-3.c b/posix/tst-rfc3484-3.c
new file mode 100644
index 0000000..4aede81
--- /dev/null
+++ b/posix/tst-rfc3484-3.c
@@ -0,0 +1,137 @@
+#include <stdbool.h>
+#include <stdio.h>
+#include <ifaddrs.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, struct in6addrinfo **in6ai, size_t *in6ailen)
+{
+  *p1 = *p2 = true;
+  *in6ai = NULL;
+  *in6ailen = 0;
+}
+void
+attribute_hidden
+__check_native (uint32_t a1_index, int *a1_native,
+		uint32_t a2_index, int *a2_native)
+{
+}
+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)
+{
+  *output = NULL;
+  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 (0xa0a86d1d) } },
+  { .sin_family = AF_INET, .sin_addr = { h (0xa0a85d03) } },
+  { .sin_family = AF_INET, .sin_addr = { h (0xa0a82c3d) } },
+  { .sin_family = AF_INET, .sin_addr = { h (0xa0a86002) } },
+  { .sin_family = AF_INET, .sin_addr = { h (0xa0a802f3) } },
+  { .sin_family = AF_INET, .sin_addr = { h (0xa0a80810) } },
+  { .sin_family = AF_INET, .sin_addr = { h (0xa0a85e02) } },
+  { .sin_family = AF_INET, .sin_addr = { h (0xac162311) } },
+  { .sin_family = AF_INET, .sin_addr = { h (0x0a324572) } }
+};
+#define naddrs (sizeof (addrs) / sizeof (addrs[0]))
+static struct addrinfo ais[naddrs];
+static struct sort_result results[naddrs];
+
+static const int expected[naddrs] =
+  {
+    8, 0, 1, 2, 3, 4, 5, 6, 7
+  };
+
+static const struct scopeentry new_scopes[] =
+  {
+    { { { 169, 254, 0, 0 } }, h (0xffff0000), 2 },
+    { { { 127, 0, 0, 0 } }, h (0xff000000), 2 },
+    { { { 10, 0, 0, 0 } }, h (0xff000000), 5 },
+    { { { 192, 168, 0, 0 } }, h(0xffff0000), 5 },
+    { { { 0, 0, 0, 0 } }, h (0x00000000), 14 }
+  };
+
+
+ssize_t
+__getline (char **lineptr, size_t *n, FILE *s)
+{
+  *lineptr = NULL;
+  *n = 0;
+  return 0;
+}
+
+
+static int
+do_test (void)
+{
+  labels = default_labels;
+  precedence = default_precedence;
+  scopes= new_scopes;
+
+  struct sockaddr_in so;
+  so.sin_family = AF_INET;
+  so.sin_addr.s_addr = h (0x0aa85f19);
+
+  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);
+      results[i].source_addr_flags = 0;
+      results[i].service_order = i;
+      results[i].prefixlen = 8;
+      results[i].index = 0;
+    }
+
+  struct sort_result_combo combo = { .results = results, .nresults = naddrs };
+  qsort_r (results, naddrs, sizeof (results[0]), rfc3484_sort, &combo);
+
+  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"
diff --git a/posix/tst-rfc3484.c b/posix/tst-rfc3484.c
index c4dd04e..fe06255 100644
--- a/posix/tst-rfc3484.c
+++ b/posix/tst-rfc3484.c
@@ -85,6 +85,7 @@ do_test (void)
 {
   labels = default_labels;
   precedence = default_precedence;
+  scopes= default_scopes;
 
   struct sockaddr_in so;
   so.sin_family = AF_INET;