File iputils-pingnamelookuponce.diff of Package iputils

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File iputils-pingnamelookuponce.diff of Package iputils

diff -ur iputils/ping.c iputils.new/ping.c
--- ping.c	2004-03-17 12:36:43.000000000 +0100
+++ ping.c	2004-03-17 12:35:49.000000000 +0100
@@ -1141,15 +1141,24 @@
 char *
 pr_addr(__u32 addr)
 {
-	struct hostent *hp;
+	struct hostent *hp = NULL;
+	static __u32 last_addr;
 	static char buf[4096];
 
-	if ((options & F_NUMERIC) ||
-	    !(hp = gethostbyaddr((char *)&addr, 4, AF_INET)))
-		sprintf(buf, "%s", inet_ntoa(*(struct in_addr *)&addr));
-	else
+	if (!(options & F_NUMERIC)) {
+		if (buf[0] && addr == last_addr)
+			return buf;
+	    	hp = gethostbyaddr((char *)&addr, 4, AF_INET);
+	}
+
+	if (hp) {
 		snprintf(buf, sizeof(buf), "%s (%s)", hp->h_name,
 			 inet_ntoa(*(struct in_addr *)&addr));
+	} else {
+		sprintf(buf, "%s", inet_ntoa(*(struct in_addr *)&addr));
+	}
+
+	last_addr = addr;
 	return(buf);
 }
 
diff -ur iputils/ping6.c iputils.new/ping6.c
--- ping6.c	2004-03-17 12:36:43.000000000 +0100
+++ ping6.c	2004-03-17 12:36:29.000000000 +0100
@@ -898,11 +898,22 @@
 char * pr_addr(struct in6_addr *addr)
 {
 	struct hostent *hp = NULL;
+	static struct in6_addr last_addr;
+	static char buf[1024];
 
-	if (!(options&F_NUMERIC))
+	if (!(options&F_NUMERIC)) {
+		if (buf[0] && !memcmp(&last_addr, addr, sizeof(*addr)))
+			return buf;
 		hp = gethostbyaddr((__u8*)addr, sizeof(struct in6_addr), AF_INET6);
+	}
 
-	return hp ? hp->h_name : pr_addr_n(addr);
+	if (hp && strlen(hp->h_name) < sizeof(buf)) {
+		strcpy(buf, hp->h_name);
+	} else {
+		inet_ntop(AF_INET6, addr, buf, sizeof(buf));
+	}
+	last_addr = *addr;
+	return buf;
 }
 
 char * pr_addr_n(struct in6_addr *addr)

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File iputils-pingnamelookuponce.diff of Package iputils

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