diff --git a/UDPSocket.cpp b/UDPSocket.cpp
index beec3ce..0bbe27b 100644
--- a/UDPSocket.cpp
+++ b/UDPSocket.cpp
@@ -118,6 +118,27 @@ bool CUDPSocket::match(const sockaddr_storage &addr1, const sockaddr_storage &ad
 	}
 }
 
+bool CUDPSocket::match_addr(const sockaddr_storage &addr1, const sockaddr_storage &addr2)
+{
+	if (addr1.ss_family != addr2.ss_family)
+		return false;
+
+	switch (addr1.ss_family) {
+	case AF_INET:
+		struct sockaddr_in *in_1, *in_2;
+		in_1 = (struct sockaddr_in *)&addr1;
+		in_2 = (struct sockaddr_in *)&addr2;
+		return (in_1->sin_addr.s_addr == in_2->sin_addr.s_addr);
+	case AF_INET6:
+		struct sockaddr_in6 *in6_1, *in6_2;
+		in6_1 = (struct sockaddr_in6 *)&addr1;
+		in6_2 = (struct sockaddr_in6 *)&addr2;
+		return IN6_ARE_ADDR_EQUAL(&in6_1->sin6_addr, &in6_2->sin6_addr);
+	default:
+		return false;
+	}
+}
+
 bool CUDPSocket::isnone(const sockaddr_storage &addr)
 {
 	struct sockaddr_in *in = (struct sockaddr_in *)&addr;
diff --git a/UDPSocket.h b/UDPSocket.h
index 46b2370..ad5b2a1 100644
--- a/UDPSocket.h
+++ b/UDPSocket.h
@@ -52,6 +52,7 @@ public:
 	static int lookup(const std::string& hostName, unsigned int port, sockaddr_storage &address, unsigned int &address_length);
 	static int lookup(const std::string& hostName, unsigned int port, sockaddr_storage &address, unsigned int &address_length, struct addrinfo &hints);
 	static bool match(const sockaddr_storage &addr1, const sockaddr_storage &addr2);
+	static bool match_addr(const sockaddr_storage &addr1, const sockaddr_storage &addr2);
 	static bool isnone(const sockaddr_storage &addr);
 
 private: