do not listen anywhere by default.

listen on *
listens, well, everywhere.

src/usr.sbin/ntpd/config.c

@@ -1,4 +1,4 @@
-/*	$OpenBSD: config.c,v 1.5 2004/07/07 03:53:14 henning Exp $ */
+/*	$OpenBSD: config.c,v 1.6 2004/07/07 05:47:57 henning Exp $ */
 
 /*
  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
@@ -77,6 +77,10 @@ host(const char *s, u_int8_t *len)
 		mask = 128;
 	}
 
+	if (!strcmp(s, "*"))
+		if ((h = calloc(1, sizeof(struct ntp_addr))) == NULL)
+			fatal(NULL);
+
 	/* IPv4 address? */
 	if (h == NULL)
 		h = host_v4(s, len);

src/usr.sbin/ntpd/ntpd.h

@@ -1,4 +1,4 @@
-/*	$OpenBSD: ntpd.h,v 1.15 2004/07/07 03:15:37 henning Exp $ */
+/*	$OpenBSD: ntpd.h,v 1.16 2004/07/07 05:47:57 henning Exp $ */
 
 /*
  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
@@ -90,6 +90,7 @@ struct ntpd_conf {
 	TAILQ_HEAD(listen_addrs, listen_addr)	listen_addrs;
 	TAILQ_HEAD(ntp_peers, ntp_peer)		ntp_peers;
 	u_int8_t				opts;
+	u_int8_t				listen_all;
 };
 
 struct buf {

src/usr.sbin/ntpd/parse.y

@@ -1,4 +1,4 @@
-/*	$OpenBSD: parse.y,v 1.5 2004/07/07 03:15:37 henning Exp $ */
+/*	$OpenBSD: parse.y,v 1.6 2004/07/07 05:47:57 henning Exp $ */
 
 /*
  * Copyright (c) 2002, 2003, 2004 Henning Brauer <henning@openbsd.org>
@@ -124,12 +124,17 @@ varset		: STRING '=' string		{
 		}
 		;
 
-conf_main	:  LISTEN ON address	{
+conf_main	: LISTEN ON address	{
 			struct listen_addr	*la;
 			struct ntp_addr		*h, *next;
 
 			for (h = $3; h != NULL; h = next) {
 				next = h->next;
+				if (h->ss.ss_family == AF_UNSPEC) {
+					conf->listen_all = 1;
+					free(h);
+					continue;
+				}
 				la = calloc(1, sizeof(struct listen_addr));
 				if (la == NULL)
 					fatal("listen on calloc");
@@ -144,9 +149,15 @@ conf_main	:  LISTEN ON address	{
 		| SERVER address	{
 			struct ntp_peer		*p;
 			struct ntp_addr		*h, *next;
-
-			for (h = $2; h != NULL; h = next) {			
+			
+			for (h = $2; h != NULL; h = next) {
 				next = h->next;
+				if (h->ss.ss_family != AF_INET &&
+				    h->ss.ss_family != AF_INET6) {
+					yyerror("IPv4 or IPv6 address "
+					    "or hostname expected");
+					YYERROR;
+				}
 				p = calloc(1, sizeof(struct ntp_peer));
 				if (p == NULL)
 					fatal("conf_main server calloc");
@@ -483,6 +494,8 @@ parse_config(char *filename, struct ntpd_conf *xconf)
 		TAILQ_INSERT_TAIL(&xconf->ntp_peers, p, entry);
 	}
 
+	xconf->listen_all = conf->listen_all;
+
 	free(conf);
 
 	return (errors ? -1 : 0);

src/usr.sbin/ntpd/server.c

@@ -1,4 +1,4 @@
-/*	$OpenBSD: server.c,v 1.4 2004/07/04 18:07:15 henning Exp $ */
+/*	$OpenBSD: server.c,v 1.5 2004/07/07 05:47:57 henning Exp $ */
 
 /*
  * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org>
@@ -36,7 +36,7 @@ setup_listeners(struct servent *se, struct ntpd_conf *conf, u_int *cnt)
 	struct sockaddr		*sap;
 	u_int			 new_cnt = 0;
 
-	if (TAILQ_EMPTY(&conf->listen_addrs)) {
+	if (conf->listen_all) {
 		if (getifaddrs(&ifap) == -1)
 			fatal("getifaddrs");