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/*
* Copyright (c) 1999 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.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
RCSID("$Id: copyhostent.c,v 1.3 2005/04/12 11:28:36 lha Exp $");
#endif
#include <roken.h>
/*
* return a malloced copy of `h'
*/
struct hostent * ROKEN_LIB_FUNCTION
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;
}
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