From b03afa868c547f323c121c33b53f94da35391af5 Mon Sep 17 00:00:00 2001
From: Pierangelo Masarati <ando@openldap.org>
Date: Sat, 5 Aug 2006 17:08:40 +0000
Subject: [PATCH] skip host="" and port=0 (ITS#4610)

---
 libraries/libldap/dnssrv.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/libraries/libldap/dnssrv.c b/libraries/libldap/dnssrv.c
index 3090c66d4d..09e3936cc3 100644
--- a/libraries/libldap/dnssrv.c
+++ b/libraries/libldap/dnssrv.c
@@ -275,8 +275,12 @@ int ldap_domain2hostlist(
 		/* weight = (p[2] << 8) | p[3]; */
 		port = (p[4] << 8) | p[5];
 
-		buflen = strlen(host) + sizeof(":65355 ");
-		hostlist = (char *) LDAP_REALLOC(hostlist, cur + buflen);
+		if ( port == 0 || host[ 0 ] == '\0' ) {
+		    goto add_size;
+		}
+
+		buflen = strlen(host) + STRLENOF(":65355 ");
+		hostlist = (char *) LDAP_REALLOC(hostlist, cur + buflen + 1);
 		if (hostlist == NULL) {
 		    rc = LDAP_NO_MEMORY;
 		    goto out;
@@ -287,6 +291,7 @@ int ldap_domain2hostlist(
 		}
 		cur += sprintf(&hostlist[cur], "%s:%hd", host, port);
 	    }
+add_size:;
 	    p += size;
 	}
     }
-- 
2.39.5