From 783aa1c48b89473fe06a17c5eeecc38f67fc4188 Mon Sep 17 00:00:00 2001
From: Daniel Hartmeier <dhartmei@cvs.openbsd.org>
Date: Fri, 19 Jul 2002 12:32:00 +0000
Subject: Use getnameinfo() instead of gethostbyaddr() to support IPv6 reverse
 lookups with pfctl -r. Makes things actually simpler.

---
 sbin/pfctl/pf_print_state.c | 60 ++++++++++++++++++++-------------------------
 sbin/pfctl/pf_print_state.h |  3 +--
 2 files changed, 28 insertions(+), 35 deletions(-)

diff --git a/sbin/pfctl/pf_print_state.c b/sbin/pfctl/pf_print_state.c
index e05c5ba89a2..c6da620b4df 100644
--- a/sbin/pfctl/pf_print_state.c
+++ b/sbin/pfctl/pf_print_state.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pf_print_state.c,v 1.3 2002/07/18 21:25:01 deraadt Exp $	*/
+/*	$OpenBSD: pf_print_state.c,v 1.4 2002/07/19 12:31:59 dhartmei Exp $	*/
 
 /*
  * Copyright (c) 2001 Daniel Hartmeier
@@ -101,19 +101,34 @@ print_addr(struct pf_addr_wrap *addr, struct pf_addr *mask, u_int8_t af)
 void
 print_name(struct pf_addr *addr, struct pf_addr *mask, int af)
 {
-	char buf[48];
-	struct hostent *hp;
-
-	if (inet_ntop(af, addr, buf, sizeof(buf)) == NULL)
-		printf("?");
-	else {
-		hp = getpfhostname(buf);
-		printf("%s", hp->h_name);
+	char host[NI_MAXHOST];
+
+	strlcpy(host, "?", sizeof(host));
+	switch (af) {
+	case AF_INET: {
+		struct sockaddr_in sin;
+
+		memset(&sin, 0, sizeof(sin));
+		sin.sin_len = sizeof(sin);
+		sin.sin_family = AF_INET;
+		sin.sin_addr = addr->v4;
+		getnameinfo((struct sockaddr *)&sin, sin.sin_len,
+		    host, sizeof(host), NULL, 0, NI_NOFQDN);
+		break;
+	}
+	case AF_INET6: {
+		struct sockaddr_in6 sin6;
+
+		memset(&sin6, 0, sizeof(sin6));
+		sin6.sin6_len = sizeof(sin6);
+		sin6.sin6_family = AF_INET6;
+		sin6.sin6_addr = addr->v6;
+		getnameinfo((struct sockaddr *)&sin6, sin6.sin6_len,
+		    host, sizeof(host), NULL, 0, NI_NOFQDN);
+		break;
 	}
-	if (mask != NULL) {
-		if (!PF_AZERO(mask, af))
-			printf("/%u", unmask(mask, af));
 	}
+	printf("%s", host);
 }
 
 void
@@ -230,24 +245,3 @@ print_state(struct pf_state *s, int opts)
 		printf("\n");
 	}
 }
-
-struct hostent *
-getpfhostname(const char *addr_str)
-{
-	struct in_addr		inaddr;
-	struct hostent		*hp;
-	static struct hostent	 myhp;
-
-	if (inet_aton(addr_str, &inaddr) == 0) {
-		myhp.h_name = (char *)addr_str;
-		hp = &myhp;
-		return (hp);
-	}
-	hp = gethostbyaddr((char *)&inaddr.s_addr, sizeof(inaddr.s_addr),
-	    AF_INET);
-	if (hp == NULL) {
-		myhp.h_name = (char *)addr_str;
-		hp = &myhp;
-	}
-	return (hp);
-}
diff --git a/sbin/pfctl/pf_print_state.h b/sbin/pfctl/pf_print_state.h
index afe7b26cc55..e88b5054bcb 100644
--- a/sbin/pfctl/pf_print_state.h
+++ b/sbin/pfctl/pf_print_state.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: pf_print_state.h,v 1.3 2002/06/11 03:14:05 dhartmei Exp $ */
+/*	$OpenBSD: pf_print_state.h,v 1.4 2002/07/19 12:31:59 dhartmei Exp $ */
 
 /*
  * Copyright (c) 2001 Daniel Hartmeier
@@ -37,6 +37,5 @@ void	print_addr (struct pf_addr_wrap *, struct pf_addr *, u_int8_t);
 void	print_host (struct pf_state_host *, u_int8_t, int);
 void	print_seq (struct pf_state_peer *);
 void	print_state(struct pf_state *s, int);
-struct hostent *getpfhostname(const char *);
 
 #endif /* _PF_PRINT_STATE_H_ */
-- 
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