Update IsIPv6ULA

Per spec https://datatracker.ietf.org/doc/html/rfc4193#section-3.1 fc/7 prefixes are local addresses, fe/8 uses a specific method and address format, but fc/8 is still a unique local address block, just with an undefined format
project-chip · Apr 5, 2024 · e65f3df · e65f3df
1 parent 11da2b1
commit e65f3df
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/inet/IPAddress.cpp b/src/inet/IPAddress.cpp
@@ -319,7 +319,7 @@ bool IPAddress::IsIPv6GlobalUnicast() const
 // Is address an IPv6 Unique Local Address?
 bool IPAddress::IsIPv6ULA() const
 {
-    return (ntohl(Addr[0]) & 0xFF000000U) == 0xFD000000U;
+    return (ntohl(Addr[0]) & 0xFE000000U) == 0xFC000000U;
 }
 
 // Is address an IPv6 Link-local Address?