From 644205aa076aa7a72bb60390c74b74c7b0e05978 Mon Sep 17 00:00:00 2001
From: Assar Westerlund <assar@sics.se>
Date: Thu, 16 Dec 1999 11:47:22 +0000
Subject: [PATCH] (krb5_expand_hostname): handle ai_canonname not being set

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@7607 ec53bebd-3082-4978-b11e-865c3cabbd6b
---
 lib/krb5/expand_hostname.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/lib/krb5/expand_hostname.c b/lib/krb5/expand_hostname.c
index 78cec5e58..2abd28780 100644
--- a/lib/krb5/expand_hostname.c
+++ b/lib/krb5/expand_hostname.c
@@ -35,6 +35,17 @@
 
 RCSID("$Id$");
 
+static krb5_error_code
+copy_hostname(krb5_context context,
+	      const char *orig_hostname,
+	      char **new_hostname)
+{
+    *new_hostname = strdup (orig_hostname);
+    if (*new_hostname == NULL)
+	return ENOMEM;
+    return 0;
+}
+
 krb5_error_code
 krb5_expand_hostname (krb5_context context,
 		      const char *orig_hostname,
@@ -47,11 +58,11 @@ krb5_expand_hostname (krb5_context context,
     hints.ai_flags = AI_CANONNAME;
 
     error = getaddrinfo (orig_hostname, NULL, &hints, &ai);
-    if (error) {
-	*new_hostname = strdup (orig_hostname);
-	if (*new_hostname == NULL)
-	    return ENOMEM;
-	return 0;
+    if (error)
+	return copy_hostname (context, orig_hostname, new_hostname);
+    if (ai->ai_canonname == NULL) {
+	freeaddrinfo (ai);
+	return copy_hostname (context, orig_hostname, new_hostname);
     }
     *new_hostname = strdup(ai->ai_canonname);
     freeaddrinfo (ai);