From d438802dcb3e270d6fcc65f075c808c64853a7c2 Mon Sep 17 00:00:00 2001
From: darrenr <darrenr@FreeBSD.org>
Date: Mon, 25 Apr 2005 17:31:50 +0000
Subject: import ipfilter 4.1.8 into the vendor branch

---
 contrib/ipfilter/lib/hostname.c | 51 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 contrib/ipfilter/lib/hostname.c

(limited to 'contrib/ipfilter/lib/hostname.c')

diff --git a/contrib/ipfilter/lib/hostname.c b/contrib/ipfilter/lib/hostname.c
new file mode 100644
index 0000000..a0109da
--- /dev/null
+++ b/contrib/ipfilter/lib/hostname.c
@@ -0,0 +1,51 @@
+/*	$NetBSD$	*/
+
+
+#include "ipf.h"
+
+char *hostname(v, ip)
+int v;
+void *ip;
+{
+	static char hostbuf[MAXHOSTNAMELEN+1];
+	struct hostent *hp;
+	struct in_addr ipa;
+	struct netent *np;
+
+	if (v == 4) {
+		ipa.s_addr = *(u_32_t *)ip;
+		if (ipa.s_addr == htonl(0xfedcba98))
+			return "test.host.dots";
+	}
+
+	if ((opts & OPT_NORESOLVE) == 0) {
+		if (v == 4) {
+			hp = gethostbyaddr(ip, 4, AF_INET);
+			if (hp != NULL && hp->h_name != NULL &&
+			    *hp->h_name != '\0') {
+				strncpy(hostbuf, hp->h_name, sizeof(hostbuf));
+				hostbuf[sizeof(hostbuf) - 1] = '\0';
+				return hostbuf;
+			}
+
+			np = getnetbyaddr(ipa.s_addr, AF_INET);
+			if (np != NULL && np->n_name != NULL &&
+			    *np->n_name != '\0') {
+				strncpy(hostbuf, np->n_name, sizeof(hostbuf));
+				hostbuf[sizeof(hostbuf) - 1] = '\0';
+				return hostbuf;
+			}
+		}
+	}
+
+	if (v == 4) {
+		return inet_ntoa(ipa);
+	}
+#ifdef  USE_INET6
+	(void) inet_ntop(AF_INET6, ip, hostbuf, sizeof(hostbuf) - 1);
+	hostbuf[MAXHOSTNAMELEN] = '\0';
+	return hostbuf;
+#else
+	return "IPv6";
+#endif
+}
-- 
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