1/*
2 * Copyright (c) 1999 Kungliga Tekniska H�gskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifdef HAVE_CONFIG_H
35#include <config.h>
36RCSID("$Id: copyhostent.c 14773 2005-04-12 11:29:18Z lha $");
37#endif
38
39#include "roken.h"
40
41/*
42 * return a malloced copy of `h'
43 */
44
45struct hostent * ROKEN_LIB_FUNCTION
46copyhostent (const struct hostent *h)
47{
48    struct hostent *res;
49    char **p;
50    int i, n;
51
52    res = malloc (sizeof (*res));
53    if (res == NULL)
54	return NULL;
55    res->h_name      = NULL;
56    res->h_aliases   = NULL;
57    res->h_addrtype  = h->h_addrtype;
58    res->h_length    = h->h_length;
59    res->h_addr_list = NULL;
60    res->h_name = strdup (h->h_name);
61    if (res->h_name == NULL) {
62	freehostent (res);
63	return NULL;
64    }
65    for (n = 0, p = h->h_aliases; *p != NULL; ++p)
66	++n;
67    res->h_aliases = malloc ((n + 1) * sizeof(*res->h_aliases));
68    if (res->h_aliases == NULL) {
69	freehostent (res);
70	return NULL;
71    }
72    for (i = 0; i < n + 1; ++i)
73	res->h_aliases[i] = NULL;
74    for (i = 0; i < n; ++i) {
75	res->h_aliases[i] = strdup (h->h_aliases[i]);
76	if (res->h_aliases[i] == NULL) {
77	    freehostent (res);
78	    return NULL;
79	}
80    }
81
82    for (n = 0, p = h->h_addr_list; *p != NULL; ++p)
83	++n;
84    res->h_addr_list = malloc ((n + 1) * sizeof(*res->h_addr_list));
85    if (res->h_addr_list == NULL) {
86	freehostent (res);
87	return NULL;
88    }
89    for (i = 0; i < n + 1; ++i) {
90	res->h_addr_list[i] = NULL;
91    }
92    for (i = 0; i < n; ++i) {
93	res->h_addr_list[i] = malloc (h->h_length);
94	if (res->h_addr_list[i] == NULL) {
95	    freehostent (res);
96	    return NULL;
97	}
98	memcpy (res->h_addr_list[i], h->h_addr_list[i], h->h_length);
99    }
100    return res;
101}
102
103