From 27fdd04153e886a882fe773c7f1bc1503ae0c132 Mon Sep 17 00:00:00 2001
From: Kurt Zeilenga <kurt@openldap.org>
Date: Sat, 15 Jun 2002 22:01:39 +0000
Subject: [PATCH] Add -4/-6 flags to slapd to force use of IPv4 or IPv6

---
 doc/man/man8/slapd.8   |  7 +++++++
 servers/slapd/daemon.c |  4 +++-
 servers/slapd/main.c   | 14 ++++++++++++++
 servers/slapd/slap.h   |  4 ++++
 4 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/doc/man/man8/slapd.8 b/doc/man/man8/slapd.8
index afb12e712f..f30dcc0a9f 100644
--- a/doc/man/man8/slapd.8
+++ b/doc/man/man8/slapd.8
@@ -6,6 +6,7 @@
 slapd \- Stand-alone LDAP Daemon
 .SH SYNOPSIS
 .B LIBEXECDIR/slapd 
+.B [\-[4|6]]
 .B [\-d debug\-level]
 .B [\-f slapd\-config\-file]
 .B [\-h URLs]
@@ -57,6 +58,12 @@ See the "OpenLDAP Administrator's Guide" for more details on
 .BR slapd .
 .SH OPTIONS
 .TP
+.B \-4
+Listen on IPv4 addresses only.
+.TP
+.B \-6
+Listen on IPv6 addresses only.
+.TP
 .BI \-d " debug\-level"
 Turn on debugging as defined by
 .I debug\-level.
diff --git a/servers/slapd/daemon.c b/servers/slapd/daemon.c
index 80de649bea..c34077e224 100644
--- a/servers/slapd/daemon.c
+++ b/servers/slapd/daemon.c
@@ -33,6 +33,8 @@ int deny_severity = LOG_NOTICE;
 #define LDAPI_MOD_URLEXT		"x-mod"
 #endif /* LDAP_PF_LOCAL */
 
+int slap_inet4or6 = AF_UNSPEC;
+
 /* globals */
 time_t starttime;
 ber_socket_t dtblsize;
@@ -414,7 +416,7 @@ static int slap_get_listener_addresses(
 		memset( &hints, '\0', sizeof(hints) );
 		hints.ai_flags = AI_PASSIVE;
 		hints.ai_socktype = SOCK_STREAM;
-		hints.ai_family = AF_UNSPEC;
+		hints.ai_family = slap_inet4or6;
 		snprintf(serv, sizeof serv, "%d", port);
 
 		if ( (err = getaddrinfo(host, serv, &hints, &res)) ) {
diff --git a/servers/slapd/main.c b/servers/slapd/main.c
index b48f222450..cea889cf7a 100644
--- a/servers/slapd/main.c
+++ b/servers/slapd/main.c
@@ -96,6 +96,8 @@ usage( char *name )
 	fprintf( stderr,
 		"usage: %s options\n", name );
 	fprintf( stderr,
+		"\t-4\t\tIPv4 only\n"
+		"\t-6\t\tIPv6 only\n"
 		"\t-d level\tDebug level" "\n"
 		"\t-f filename\tConfiguration file\n"
 #if defined(HAVE_SETUID) && defined(HAVE_SETGID)
@@ -216,6 +218,9 @@ int main( int argc, char **argv )
 
 	while ( (i = getopt( argc, argv,
 			     "d:f:h:s:n:t"
+#if LDAP_PF_INET6
+				"46"
+#endif
 #ifdef HAVE_CHROOT
 				"r:"
 #endif
@@ -227,6 +232,15 @@ int main( int argc, char **argv )
 #endif
 			     )) != EOF ) {
 		switch ( i ) {
+#ifdef LDAP_PF_INET6
+		case '4':
+			slap_inet4or6 = AF_INET;
+			break;
+		case '6':
+			slap_inet4or6 = AF_INET6;
+			break;
+#endif
+
 		case 'h':	/* listen URLs */
 			if ( urls != NULL ) free( urls );
 			urls = ch_strdup( optarg );
diff --git a/servers/slapd/slap.h b/servers/slapd/slap.h
index b4c0d795dd..b3b129ba10 100644
--- a/servers/slapd/slap.h
+++ b/servers/slapd/slap.h
@@ -250,6 +250,10 @@ typedef union slap_sockaddr {
 #endif
 } Sockaddr;
 
+#ifdef LDAP_PF_INET6
+extern int slap_inet4or6;
+#endif
+
 typedef struct slap_oid_macro {
 	struct berval som_oid;
 	char **som_names;
-- 
2.39.5