diff --git a/libc/include/netinet/in.h b/libc/include/netinet/in.h
index 0ebd926..7a4b6c7 100644
--- a/libc/include/netinet/in.h
+++ b/libc/include/netinet/in.h
@@ -38,6 +38,8 @@
 
 #define IPPORT_RESERVED  1024
 
+#define INET_ADDRSTRLEN 16
+
 extern int bindresvport (int sd, struct sockaddr_in *sin);
 
 static const struct in6_addr in6addr_any = IN6ADDR_ANY_INIT;
diff --git a/libc/include/netinet/in6.h b/libc/include/netinet/in6.h
index 2f5fee1..c7a6374 100644
--- a/libc/include/netinet/in6.h
+++ b/libc/include/netinet/in6.h
@@ -74,6 +74,9 @@
 #define IPV6_ADDR_MC_SCOPE(a)	\
 	((a)->s6_addr[1] & 0x0f)
 
+#define IN6_IS_ADDR_MC_NODELOCAL(a)     \
+	(IN6_IS_ADDR_MULTICAST(a) &&  \
+	 (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_NODELOCAL))
 #define IN6_IS_ADDR_MC_LINKLOCAL(a)	\
 	(IN6_IS_ADDR_MULTICAST(a) &&  \
 	 (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_LINKLOCAL))
@@ -83,7 +86,9 @@
 #define IN6_IS_ADDR_MC_ORGLOCAL(a)     \
 	(IN6_IS_ADDR_MULTICAST(a) &&  \
 	 (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_ORGLOCAL))
-
+#define IN6_IS_ADDR_MC_GLOBAL(a)       \
+	(IN6_IS_ADDR_MULTICAST(a) &&  \
+	 (IPV6_ADDR_MC_SCOPE(a) == IPV6_ADDR_SCOPE_GLOBAL))
 
 #define IN6_ARE_ADDR_EQUAL(a, b)			\
     (memcmp(&(a)->s6_addr[0], &(b)->s6_addr[0], sizeof(struct in6_addr)) == 0)