Supports unique local unicast addresses.

diff --git a/lib/ipv6.c b/lib/ipv6.c
index 88c54eb6e733550a3ecbfa9640bc46dca3c4f953..7c28c48a0549be2eeeb6e232b2ea8326646e2acc 100644 (file)
--- a/lib/ipv6.c
+++ b/lib/ipv6.c
@@ -67,13 +67,15 @@ ipv6_classify(ip_addr *a)
 {
   u32 x = a->addr[0];
 
-  if ((x & 0xe0000000) == 0x20000000)          /* Aggregatable Global Unicast Address */
+  if ((x & 0xe0000000) == 0x20000000)          /* 2000::/3  Aggregatable Global Unicast Address */
     return IADDR_HOST | SCOPE_UNIVERSE;
-  if ((x & 0xffc00000) == 0xfe800000)          /* Link-Local Address */
+  if ((x & 0xffc00000) == 0xfe800000)          /* fe80::/10 Link-Local Address */
     return IADDR_HOST | SCOPE_LINK;
-  if ((x & 0xffc00000) == 0xfec00000)          /* Site-Local Address */
+  if ((x & 0xffc00000) == 0xfec00000)          /* fec0::/10 Site-Local Address */
     return IADDR_HOST | SCOPE_SITE;
-  if ((x & 0xff000000) == 0xff000000)          /* Multicast Address */
+  if ((x & 0xfe000000) == 0xfc000000)          /* fc00::/7  Unique Local Unicast Address (RFC 4193) */
+    return IADDR_HOST | SCOPE_SITE;
+  if ((x & 0xff000000) == 0xff000000)          /* ff00::/8  Multicast Address */
     {
       unsigned int scope = (x >> 16) & 0x0f;
       switch (scope)