--- iputils/ping.c.addrcache	2002-09-20 17:08:11.000000000 +0200

+++ iputils/ping.c	2003-05-15 16:41:19.000000000 +0200

@@ -1124,6 +1124,12 @@

 {

 	struct hostent *hp;

 	static char buf[4096];

+	static __u32 addr_cache = 0;

+

+	if ( addr == addr_cache )

+		return buf;

+

+	addr_cache = addr;

 	if ((options & F_NUMERIC) ||

 	    !(hp = gethostbyaddr((char *)&addr, 4, AF_INET)))

--- iputils/ping6.c.addrcache	2002-09-20 17:08:11.000000000 +0200

+++ iputils/ping6.c	2003-05-15 16:41:19.000000000 +0200

@@ -893,7 +893,14 @@

  */

 char * pr_addr(struct in6_addr *addr)

 {

-	struct hostent *hp = NULL;

+	static struct hostent *hp = NULL;

+	static struct in6_addr addr_cache = {{{0,0,0,0}}};

+

+	if ( addr->s6_addr32[0] == addr_cache.s6_addr32[0] &&

+	     addr->s6_addr32[1] == addr_cache.s6_addr32[1] &&

+	     addr->s6_addr32[2] == addr_cache.s6_addr32[2] &&

+	     addr->s6_addr32[3] == addr_cache.s6_addr32[3] )

+		return hp ? hp->h_name : pr_addr_n(addr);

 	if (!(options&F_NUMERIC))

 		hp = gethostbyaddr((__u8*)addr, sizeof(struct in6_addr), AF_INET6);