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> 36 RCSID("$Id: copyhostent.c,v 1.2 1999/12/02 16:58:45 joda Exp $"); 37 #endif 38 39 #include "roken.h" 40 41 /* 42 * return a malloced copy of `h' 43 */ 44 45 struct hostent * 46 copyhostent (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