Don't treat private IPv4 addresses as being in a non-global scope. The effect of this change is essentially to prefer NATed IPv4 over 6to4.
Change-Id: I53a8613ca9eb61cac0bf18f0b5f98a2d35ab9c50
diff --git a/libc/netbsd/net/getaddrinfo.c b/libc/netbsd/net/getaddrinfo.c
index 4510652..778f44c 100644
--- a/libc/netbsd/net/getaddrinfo.c
+++ b/libc/netbsd/net/getaddrinfo.c
@@ -1497,11 +1497,13 @@
if (IN_LOOPBACK(na) || /* 127.0.0.0/8 */
(na & 0xffff0000) == 0xa9fe0000) { /* 169.254.0.0/16 */
return IPV6_ADDR_SCOPE_LINKLOCAL;
- } else if ((na & 0xff000000) == 0x0a000000 || /* 10.0.0.0/8 */
- (na & 0xfff00000) == 0xac100000 || /* 172.16.0.0/12 */
- (na & 0xffff0000) == 0xc0a80000) { /* 192.168.0.0/16 */
- return IPV6_ADDR_SCOPE_SITELOCAL;
} else {
+ /*
+ * According to draft-ietf-6man-rfc3484-revise-01 section 2.3,
+ * it is best not to treat the private IPv4 ranges
+ * (10.0.0.0/8, 172.16.0.0/12 and 192.168.0.0/16) as being
+ * in a special scope, so we don't.
+ */
return IPV6_ADDR_SCOPE_GLOBAL;
}
} else {
