1 files changed, 80 insertions, 0 deletions
diff --git a/crypto/heimdal/lib/krb5/expand_hostname.c b/crypto/heimdal/lib/krb5/expand_hostname.c
new file mode 100644
index 0000000..698b300
--- /dev/null
+++ b/crypto/heimdal/lib/krb5/expand_hostname.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 1999 - 2000 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden). 
+ * All rights reserved. 
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions 
+ * are met: 
+ *
+ * 1. Redistributions of source code must retain the above copyright 
+ *    notice, this list of conditions and the following disclaimer. 
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright 
+ *    notice, this list of conditions and the following disclaimer in the 
+ *    documentation and/or other materials provided with the distribution. 
+ *
+ * 3. Neither the name of the Institute nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software 
+ *    without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+ * SUCH DAMAGE. 
+ */
+
+#include "krb5_locl.h"
+
+RCSID("$Id: expand_hostname.c,v 1.5 2000/01/08 08:07:18 assar Exp $");
+
+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;
+}
+
+/*
+ * Try to make `orig_hostname' into a more canonical one in the newly
+ * allocated space returned in `new_hostname'.
+ */
+
+krb5_error_code
+krb5_expand_hostname (krb5_context context,
+		      const char *orig_hostname,
+		      char **new_hostname)
+{
+    struct addrinfo *ai, *a, hints;
+    int error;
+
+    memset (&hints, 0, sizeof(hints));
+    hints.ai_flags = AI_CANONNAME;
+
+    error = getaddrinfo (orig_hostname, NULL, &hints, &ai);
+    if (error)
+	return copy_hostname (context, orig_hostname, new_hostname);
+    for (a = ai; a != NULL; a = a->ai_next) {
+	if (a->ai_canonname != NULL) {
+	    *new_hostname = strdup (a->ai_canonname);
+	    freeaddrinfo (ai);
+	    if (*new_hostname == NULL)
+		return ENOMEM;
+	    else
+		return 0;
+	}
+    }
+    freeaddrinfo (ai);
+    return copy_hostname (context, orig_hostname, new_hostname);
+}