1 files changed, 58 insertions, 0 deletions
diff --git a/lib/hostname.c b/lib/hostname.c
new file mode 100644
index 0000000..b8295d4
--- /dev/null
+++ b/lib/hostname.c
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2002-2003 by Darren Reed.
+ * 
+ * See the IPFILTER.LICENCE file for details on licencing.  
+ *   
+ * $Id: hostname.c,v 1.6.2.2 2007/01/16 02:25:22 darrenr Exp $ 
+ */     
+
+#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;
+
+	memset(&ipa, 0, sizeof(ipa));	/* XXX gcc */
+
+	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
+}