Bug#468801: libc6: RFC3484 scoping rules should only affect IPv6, not IPv4
Just a little update here: Fedora has commited the change and it'll be
part of F13. See <https://bugzilla.redhat.com/show_bug.cgi?id=577626>. I
have tested their patch (attached) and it works as expected.
It would really be fantastic if this could be commited to Debian as well!
Best regards,
--
Tore Anderson
--- glibc-2.11-332-g2e7c805/ChangeLog
+++ glibc-2.11.90-17/ChangeLog
@@ -1,3 +1,9 @@
+2010-04-06 Ulrich Drepper <drepper@redhat.com>
+
+ * sysdeps/posix/getaddrinfo.c (default_scopes): Assign global
+ scope to RFC 1918 addresses.
+ * posix/gai.conf: Document difference from RFC 3484.
+
2010-04-05 Thomas Schwinge <thomas@schwinge.name>
* sysdeps/gnu/unwind-resume.c: New, moved from nptl/sysdeps/pthread/.
--- glibc-2.11-332-g2e7c805/posix/gai.conf
+++ glibc-2.11.90-17/posix/gai.conf
@@ -41,7 +41,7 @@
#
# precedence <mask> <value>
# Add another rule to the RFC 3484 precedence table. See section 2.1
-# and 10.3 in RFC 3484. The default is:
+# and 10.3 in RFC 3484. The RFC requires:
#
#precedence ::1/128 50
#precedence ::/0 40
@@ -58,7 +58,7 @@
# 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:
+# The definitions in RFC 1918 are equivalent to:
#
#scopev4 ::ffff:169.254.0.0/112 2
#scopev4 ::ffff:127.0.0.0/104 2
@@ -75,3 +75,5 @@
#scopev4 ::ffff:169.254.0.0/112 2
#scopev4 ::ffff:127.0.0.0/104 2
#scopev4 ::ffff:0.0.0.0/96 14
+#
+# This is what the Red Hat setting currently uses.
--- glibc-2.11-332-g2e7c805/sysdeps/posix/getaddrinfo.c
+++ glibc-2.11.90-17/sysdeps/posix/getaddrinfo.c
@@ -1099,10 +1099,12 @@ static const struct scopeentry
/* Link-local addresses: scope 2. */
{ { { 169, 254, 0, 0 } }, htonl_c (0xffff0000), 2 },
{ { { 127, 0, 0, 0 } }, htonl_c (0xff000000), 2 },
+#if 0
/* Site-local addresses: scope 5. */
{ { { 10, 0, 0, 0 } }, htonl_c (0xff000000), 5 },
{ { { 172, 16, 0, 0 } }, htonl_c (0xfff00000), 5 },
{ { { 192, 168, 0, 0 } }, htonl_c (0xffff0000), 5 },
+#endif
/* Default: scope 14. */
{ { { 0, 0, 0, 0 } }, htonl_c (0x00000000), 14 }
};
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