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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.

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Change-Id: I53a8613ca9eb61cac0bf18f0b5f98a2d35ab9c50
This commit is contained in:
Steinar H. Gunderson 2010-12-20 11:15:33 +01:00
parent d4a65d28d4
commit d1624add2b
1 changed files with 6 additions and 4 deletions
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10
libc/netbsd/net/getaddrinfo.c
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@ -1497,11 +1497,13 @@ _get_scope(const struct sockaddr *addr)
if (IN_LOOPBACK(na) || /* 127.0.0.0/8 */ if (IN_LOOPBACK(na) || /* 127.0.0.0/8 */
(na & 0xffff0000) == 0xa9fe0000) { /* 169.254.0.0/16 */ (na & 0xffff0000) == 0xa9fe0000) { /* 169.254.0.0/16 */
return IPV6_ADDR_SCOPE_LINKLOCAL; 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 { } 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; return IPV6_ADDR_SCOPE_GLOBAL;
} }
} else { } else {