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-rw-r--r--Userland/Libraries/LibC/netinet/in.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/Userland/Libraries/LibC/netinet/in.h b/Userland/Libraries/LibC/netinet/in.h
index 5b8e1274e5..c31dfe01cf 100644
--- a/Userland/Libraries/LibC/netinet/in.h
+++ b/Userland/Libraries/LibC/netinet/in.h
@@ -41,6 +41,8 @@ static inline uint32_t ntohl(uint32_t value)
return htonl(value);
}
+#define IN_MULTICAST(x) (((x)&0xf0000000) == 0xe0000000)
+
// NOTE: The IPv6 Addressing Scheme that we detect are documented in RFC# 2373.
// See: https://datatracker.ietf.org/doc/html/rfc2373