new files

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@6470 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/roken/copyhostent.c

@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 1999 Kungliga Tekniska H<>gskolan
+ * (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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the Kungliga Tekniska
+ *      H<>gskolan and its contributors.
+ * 
+ * 4. 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+RCSID("$Id$");
+#endif
+
+#include "roken.h"
+
+/*
+ * return a malloced copy of `h'
+ */
+
+struct hostent *
+copyhostent (const struct hostent *h)
+{
+    struct hostent *res;
+    char **p;
+    int i, n;
+
+    res = malloc (sizeof (*res));
+    if (res == NULL)
+	return NULL;
+    res->h_name      = NULL;
+    res->h_aliases   = NULL;
+    res->h_addrtype  = h->h_addrtype;
+    res->h_length    = h->h_length;
+    res->h_addr_list = NULL;
+    res->h_name = strdup (h->h_name);
+    if (res->h_name == NULL) {
+	freehostent (res);
+	return NULL;
+    }
+    for (n = 0, p = h->h_aliases; *p != NULL; ++p)
+	++n;
+    res->h_aliases = malloc ((n + 1) * sizeof(*res->h_aliases));
+    if (res->h_aliases == NULL) {
+	freehostent (res);
+	return NULL;
+    }
+    for (i = 0; i < n + 1; ++i)
+	res->h_aliases[i] = NULL;
+    for (i = 0; i < n; ++i) {
+	res->h_aliases[i] = strdup (h->h_aliases[i]);
+	if (res->h_aliases[i] == NULL) {
+	    freehostent (res);
+	    return NULL;
+	}
+    }
+
+    for (n = 0, p = h->h_addr_list; *p != NULL; ++p)
+	++n;
+    res->h_addr_list = malloc ((n + 1) * sizeof(*res->h_addr_list));
+    if (res->h_addr_list == NULL) {
+	freehostent (res);
+	return NULL;
+    }
+    for (i = 0; i < n + 1; ++i) {
+	res->h_addr_list[i] = NULL;
+    }
+    for (i = 0; i < n; ++i) {
+	res->h_addr_list[i] = malloc (h->h_length);
+	if (res->h_addr_list[i] == NULL) {
+	    freehostent (res);
+	    return NULL;
+	}
+	memcpy (res->h_addr_list[i], h->h_addr_list[i], h->h_length);
+    }
+    return res;
+}
+