--- libaitio/src/Attic/tools.c	2012/09/19 15:19:53	1.18
+++ libaitio/src/Attic/tools.c	2012/11/19 21:12:03	1.19
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@elwix.org>
 *
 * $Author: misho $
-* $Id: tools.c,v 1.18 2012/09/19 15:19:53 misho Exp $
+* $Id: tools.c,v 1.19 2012/11/19 21:12:03 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -638,6 +638,41 @@ io_gethostbyname(const char *psHost, u_short port, io_
 	}
 
 	return NULL;
+}
+
+/*
+ * io_addrcmp() - Compare network addresses
+ *
+ * @a = 1st address
+ * @b = 2nd address
+ * @p = compare and ports, if family is AF_INET or AF_INET6
+ * return: 0 is equal or !=0 is different
+ */
+int
+io_addrcmp(io_sockaddr_t * __restrict a, io_sockaddr_t * __restrict b, int p)
+{
+	if (a && b && a->sa.sa_family == b->sa.sa_family)
+		switch (a->sa.sa_family) {
+			case AF_LOCAL:
+				return strcmp(a->sun.sun_path, b->sun.sun_path);
+			case AF_INET:
+				if (p && (a->sin.sin_port - b->sin.sin_port))
+					return (int) !!(a->sin.sin_port - b->sin.sin_port);
+				else
+					return memcmp(&a->sin.sin_addr, &b->sin.sin_addr, 
+							sizeof a->sin.sin_addr);
+			case AF_INET6:
+				if (p && (a->sin6.sin6_port - b->sin6.sin6_port))
+					return (int) !!(a->sin6.sin6_port - b->sin6.sin6_port);
+				else
+					return memcmp(&a->sin6.sin6_addr, &b->sin6.sin6_addr, 
+							sizeof a->sin6.sin6_addr);
+			case AF_LINK:
+				return memcmp(&a->sdl.sdl_data, &b->sdl.sdl_data, 
+						sizeof a->sdl.sdl_data);
+		}
+
+	return (int) !!(a - b);
 }
 
 /*